From 8bf62ecee58360749c5f0e68bc97d5e02a6816b1 Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Thu, 12 May 2005 15:29:42 -0400 Subject: [PATCH 01/59] [libata] C/H/S support, for older devices --- drivers/scsi/libata-core.c | 140 ++++++++++++++---- drivers/scsi/libata-scsi.c | 292 +++++++++++++++++++++++-------------- include/linux/ata.h | 14 ++ include/linux/libata.h | 6 + 4 files changed, 318 insertions(+), 134 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 0b5d3a5b7eda..96355b05fe5c 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -52,6 +52,7 @@ static unsigned int ata_busy_sleep (struct ata_port *ap, unsigned long tmout_pat, unsigned long tmout); +static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev); static void ata_set_mode(struct ata_port *ap); static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift); @@ -1008,7 +1009,7 @@ static inline void ata_dump_id(struct ata_device *dev) static void ata_dev_identify(struct ata_port *ap, unsigned int device) { struct ata_device *dev = &ap->device[device]; - unsigned int i; + unsigned int major_version; u16 tmp; unsigned long xfer_modes; u8 status; @@ -1106,9 +1107,9 @@ retry: * common ATA, ATAPI feature tests */ - /* we require LBA and DMA support (bits 8 & 9 of word 49) */ - if (!ata_id_has_dma(dev->id) || !ata_id_has_lba(dev->id)) { - printk(KERN_DEBUG "ata%u: no dma/lba\n", ap->id); + /* we require DMA support (bits 8 of word 49) */ + if (!ata_id_has_dma(dev->id)) { + printk(KERN_DEBUG "ata%u: no dma\n", ap->id); goto err_out_nosup; } @@ -1128,32 +1129,69 @@ retry: if (!ata_id_is_ata(dev->id)) /* sanity check */ goto err_out_nosup; + /* get major version */ tmp = dev->id[ATA_ID_MAJOR_VER]; - for (i = 14; i >= 1; i--) - if (tmp & (1 << i)) + for (major_version = 14; major_version >= 1; major_version--) + if (tmp & (1 << major_version)) break; - /* we require at least ATA-3 */ - if (i < 3) { - printk(KERN_DEBUG "ata%u: no ATA-3\n", ap->id); - goto err_out_nosup; - } + /* + * The exact sequence expected by certain pre-ATA4 drives is: + * SRST RESET + * IDENTIFY + * INITIALIZE DEVICE PARAMETERS + * anything else.. + * Some drives were very specific about that exact sequence. + */ + if (major_version < 4 || (!ata_id_has_lba(dev->id))) + ata_dev_init_params(ap, dev); + + if (ata_id_has_lba(dev->id)) { + dev->flags |= ATA_DFLAG_LBA; + + if (ata_id_has_lba48(dev->id)) { + dev->flags |= ATA_DFLAG_LBA48; + dev->n_sectors = ata_id_u64(dev->id, 100); + } else { + dev->n_sectors = ata_id_u32(dev->id, 60); + } + + /* print device info to dmesg */ + printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n", + ap->id, device, + major_version, + ata_mode_string(xfer_modes), + (unsigned long long)dev->n_sectors, + dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA"); + } else { + /* CHS */ + + /* Default translation */ + dev->cylinders = dev->id[1]; + dev->heads = dev->id[3]; + dev->sectors = dev->id[6]; + dev->n_sectors = dev->cylinders * dev->heads * dev->sectors; + + if (ata_id_current_chs_valid(dev->id)) { + /* Current CHS translation is valid. */ + dev->cylinders = dev->id[54]; + dev->heads = dev->id[55]; + dev->sectors = dev->id[56]; + + dev->n_sectors = ata_id_u32(dev->id, 57); + } + + /* print device info to dmesg */ + printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n", + ap->id, device, + major_version, + ata_mode_string(xfer_modes), + (unsigned long long)dev->n_sectors, + (int)dev->cylinders, (int)dev->heads, (int)dev->sectors); - if (ata_id_has_lba48(dev->id)) { - dev->flags |= ATA_DFLAG_LBA48; - dev->n_sectors = ata_id_u64(dev->id, 100); - } else { - dev->n_sectors = ata_id_u32(dev->id, 60); } ap->host->max_cmd_len = 16; - - /* print device info to dmesg */ - printk(KERN_INFO "ata%u: dev %u ATA, max %s, %Lu sectors:%s\n", - ap->id, device, - ata_mode_string(xfer_modes), - (unsigned long long)dev->n_sectors, - dev->flags & ATA_DFLAG_LBA48 ? " lba48" : ""); } /* ATAPI-specific feature tests */ @@ -1946,6 +1984,54 @@ static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev) DPRINTK("EXIT\n"); } +/** + * ata_dev_init_params - Issue INIT DEV PARAMS command + * @ap: Port associated with device @dev + * @dev: Device to which command will be sent + * + * LOCKING: + */ + +static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev) +{ + DECLARE_COMPLETION(wait); + struct ata_queued_cmd *qc; + int rc; + unsigned long flags; + u16 sectors = dev->id[6]; + u16 heads = dev->id[3]; + + /* Number of sectors per track 1-255. Number of heads 1-16 */ + if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) + return; + + /* set up init dev params taskfile */ + DPRINTK("init dev params \n"); + + qc = ata_qc_new_init(ap, dev); + BUG_ON(qc == NULL); + + qc->tf.command = ATA_CMD_INIT_DEV_PARAMS; + qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + qc->tf.protocol = ATA_PROT_NODATA; + qc->tf.nsect = sectors; + qc->tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ + + qc->waiting = &wait; + qc->complete_fn = ata_qc_complete_noop; + + spin_lock_irqsave(&ap->host_set->lock, flags); + rc = ata_qc_issue(qc); + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + if (rc) + ata_port_disable(ap); + else + wait_for_completion(&wait); + + DPRINTK("EXIT\n"); +} + /** * ata_sg_clean - * @qc: @@ -2736,8 +2822,12 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, ata_tf_init(ap, &qc->tf, dev->devno); - if (dev->flags & ATA_DFLAG_LBA48) - qc->tf.flags |= ATA_TFLAG_LBA48; + if (dev->flags & ATA_DFLAG_LBA) { + qc->tf.flags |= ATA_TFLAG_LBA; + + if (dev->flags & ATA_DFLAG_LBA48) + qc->tf.flags |= ATA_TFLAG_LBA48; + } } return qc; diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 4c96df060c3b..8b065ef0e39a 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -435,78 +435,108 @@ static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; + struct ata_device *dev = qc->dev; + unsigned int lba = tf->flags & ATA_TFLAG_LBA; unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; u64 dev_sectors = qc->dev->n_sectors; - u64 sect = 0; - u32 n_sect = 0; + u64 block = 0; + u32 n_block = 0; tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf->protocol = ATA_PROT_NODATA; - tf->device |= ATA_LBA; if (scsicmd[0] == VERIFY) { - sect |= ((u64)scsicmd[2]) << 24; - sect |= ((u64)scsicmd[3]) << 16; - sect |= ((u64)scsicmd[4]) << 8; - sect |= ((u64)scsicmd[5]); + block |= ((u64)scsicmd[2]) << 24; + block |= ((u64)scsicmd[3]) << 16; + block |= ((u64)scsicmd[4]) << 8; + block |= ((u64)scsicmd[5]); - n_sect |= ((u32)scsicmd[7]) << 8; - n_sect |= ((u32)scsicmd[8]); + n_block |= ((u32)scsicmd[7]) << 8; + n_block |= ((u32)scsicmd[8]); } else if (scsicmd[0] == VERIFY_16) { - sect |= ((u64)scsicmd[2]) << 56; - sect |= ((u64)scsicmd[3]) << 48; - sect |= ((u64)scsicmd[4]) << 40; - sect |= ((u64)scsicmd[5]) << 32; - sect |= ((u64)scsicmd[6]) << 24; - sect |= ((u64)scsicmd[7]) << 16; - sect |= ((u64)scsicmd[8]) << 8; - sect |= ((u64)scsicmd[9]); + block |= ((u64)scsicmd[2]) << 56; + block |= ((u64)scsicmd[3]) << 48; + block |= ((u64)scsicmd[4]) << 40; + block |= ((u64)scsicmd[5]) << 32; + block |= ((u64)scsicmd[6]) << 24; + block |= ((u64)scsicmd[7]) << 16; + block |= ((u64)scsicmd[8]) << 8; + block |= ((u64)scsicmd[9]); - n_sect |= ((u32)scsicmd[10]) << 24; - n_sect |= ((u32)scsicmd[11]) << 16; - n_sect |= ((u32)scsicmd[12]) << 8; - n_sect |= ((u32)scsicmd[13]); + n_block |= ((u32)scsicmd[10]) << 24; + n_block |= ((u32)scsicmd[11]) << 16; + n_block |= ((u32)scsicmd[12]) << 8; + n_block |= ((u32)scsicmd[13]); } else return 1; - if (!n_sect) + if (!n_block) return 1; - if (sect >= dev_sectors) + if (block >= dev_sectors) return 1; - if ((sect + n_sect) > dev_sectors) + if ((block + n_block) > dev_sectors) return 1; if (lba48) { - if (n_sect > (64 * 1024)) + if (n_block > (64 * 1024)) return 1; } else { - if (n_sect > 256) + if (n_block > 256) return 1; } - if (lba48) { - tf->command = ATA_CMD_VERIFY_EXT; + if (lba) { + if (lba48) { + tf->command = ATA_CMD_VERIFY_EXT; - tf->hob_nsect = (n_sect >> 8) & 0xff; + tf->hob_nsect = (n_block >> 8) & 0xff; - tf->hob_lbah = (sect >> 40) & 0xff; - tf->hob_lbam = (sect >> 32) & 0xff; - tf->hob_lbal = (sect >> 24) & 0xff; + tf->hob_lbah = (block >> 40) & 0xff; + tf->hob_lbam = (block >> 32) & 0xff; + tf->hob_lbal = (block >> 24) & 0xff; + } else { + tf->command = ATA_CMD_VERIFY; + + tf->device |= (block >> 24) & 0xf; + } + + tf->nsect = n_block & 0xff; + + tf->lbah = (block >> 16) & 0xff; + tf->lbam = (block >> 8) & 0xff; + tf->lbal = block & 0xff; + + tf->device |= ATA_LBA; } else { + /* CHS */ + u32 sect, head, cyl, track; + + /* Convert LBA to CHS */ + track = (u32)block / dev->sectors; + cyl = track / dev->heads; + head = track % dev->heads; + sect = (u32)block % dev->sectors + 1; + + DPRINTK("block[%u] track[%u] cyl[%u] head[%u] sect[%u] \n", (u32)block, track, cyl, head, sect); + + /* Check whether the converted CHS can fit. + Cylinder: 0-65535 + Head: 0-15 + Sector: 1-255*/ + if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) + return 1; + tf->command = ATA_CMD_VERIFY; - - tf->device |= (sect >> 24) & 0xf; + tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ + tf->lbal = sect; + tf->lbam = cyl; + tf->lbah = cyl >> 8; + tf->device |= head; } - tf->nsect = n_sect & 0xff; - - tf->lbah = (sect >> 16) & 0xff; - tf->lbam = (sect >> 8) & 0xff; - tf->lbal = sect & 0xff; - return 0; } @@ -533,11 +563,14 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; + struct ata_device *dev = qc->dev; + unsigned int lba = tf->flags & ATA_TFLAG_LBA; unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; + u64 block = 0; + u32 n_block = 0; tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf->protocol = qc->dev->xfer_protocol; - tf->device |= ATA_LBA; if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 || scsicmd[0] == READ_16) { @@ -547,80 +580,111 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) tf->flags |= ATA_TFLAG_WRITE; } + /* Calculate the SCSI LBA and transfer length. */ if (scsicmd[0] == READ_10 || scsicmd[0] == WRITE_10) { - if (lba48) { - tf->hob_nsect = scsicmd[7]; - tf->hob_lbal = scsicmd[2]; + block |= ((u64)scsicmd[2]) << 24; + block |= ((u64)scsicmd[3]) << 16; + block |= ((u64)scsicmd[4]) << 8; + block |= ((u64)scsicmd[5]); - qc->nsect = ((unsigned int)scsicmd[7] << 8) | - scsicmd[8]; - } else { - /* if we don't support LBA48 addressing, the request - * -may- be too large. */ - if ((scsicmd[2] & 0xf0) || scsicmd[7]) - return 1; - - /* stores LBA27:24 in lower 4 bits of device reg */ - tf->device |= scsicmd[2]; - - qc->nsect = scsicmd[8]; - } - - tf->nsect = scsicmd[8]; - tf->lbal = scsicmd[5]; - tf->lbam = scsicmd[4]; - tf->lbah = scsicmd[3]; + n_block |= ((u32)scsicmd[7]) << 8; + n_block |= ((u32)scsicmd[8]); VPRINTK("ten-byte command\n"); - return 0; - } - - if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) { - qc->nsect = tf->nsect = scsicmd[4]; - tf->lbal = scsicmd[3]; - tf->lbam = scsicmd[2]; - tf->lbah = scsicmd[1] & 0x1f; /* mask out reserved bits */ - + } else if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) { + block |= ((u64)scsicmd[2]) << 8; + block |= ((u64)scsicmd[3]); + n_block |= ((u32)scsicmd[4]); + VPRINTK("six-byte command\n"); - return 0; - } + } else if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) { + block |= ((u64)scsicmd[2]) << 56; + block |= ((u64)scsicmd[3]) << 48; + block |= ((u64)scsicmd[4]) << 40; + block |= ((u64)scsicmd[5]) << 32; + block |= ((u64)scsicmd[6]) << 24; + block |= ((u64)scsicmd[7]) << 16; + block |= ((u64)scsicmd[8]) << 8; + block |= ((u64)scsicmd[9]); - if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) { - /* rule out impossible LBAs and sector counts */ - if (scsicmd[2] || scsicmd[3] || scsicmd[10] || scsicmd[11]) - return 1; - - if (lba48) { - tf->hob_nsect = scsicmd[12]; - tf->hob_lbal = scsicmd[6]; - tf->hob_lbam = scsicmd[5]; - tf->hob_lbah = scsicmd[4]; - - qc->nsect = ((unsigned int)scsicmd[12] << 8) | - scsicmd[13]; - } else { - /* once again, filter out impossible non-zero values */ - if (scsicmd[4] || scsicmd[5] || scsicmd[12] || - (scsicmd[6] & 0xf0)) - return 1; - - /* stores LBA27:24 in lower 4 bits of device reg */ - tf->device |= scsicmd[6]; - - qc->nsect = scsicmd[13]; - } - - tf->nsect = scsicmd[13]; - tf->lbal = scsicmd[9]; - tf->lbam = scsicmd[8]; - tf->lbah = scsicmd[7]; + n_block |= ((u32)scsicmd[10]) << 24; + n_block |= ((u32)scsicmd[11]) << 16; + n_block |= ((u32)scsicmd[12]) << 8; + n_block |= ((u32)scsicmd[13]); VPRINTK("sixteen-byte command\n"); - return 0; + } else { + DPRINTK("no-byte command\n"); + return 1; } - DPRINTK("no-byte command\n"); - return 1; + /* Check and compose ATA command */ + if (!n_block) + /* In ATA, sector count 0 means 256 or 65536 sectors, not 0 sectors. */ + return 1; + + if (lba) { + if (lba48) { + /* The request -may- be too large for LBA48. */ + if ((block >> 48) || (n_block > 65536)) + return 1; + + tf->hob_nsect = (n_block >> 8) & 0xff; + + tf->hob_lbah = (block >> 40) & 0xff; + tf->hob_lbam = (block >> 32) & 0xff; + tf->hob_lbal = (block >> 24) & 0xff; + } else { + /* LBA28 */ + + /* The request -may- be too large for LBA28. */ + if ((block >> 28) || (n_block > 256)) + return 1; + + tf->device |= (block >> 24) & 0xf; + } + + qc->nsect = n_block; + tf->nsect = n_block & 0xff; + + tf->lbah = (block >> 16) & 0xff; + tf->lbam = (block >> 8) & 0xff; + tf->lbal = block & 0xff; + + tf->device |= ATA_LBA; + } else { + /* CHS */ + u32 sect, head, cyl, track; + + /* The request -may- be too large for CHS addressing. */ + if ((block >> 28) || (n_block > 256)) + return 1; + + /* Convert LBA to CHS */ + track = (u32)block / dev->sectors; + cyl = track / dev->heads; + head = track % dev->heads; + sect = (u32)block % dev->sectors + 1; + + DPRINTK("block[%u] track[%u] cyl[%u] head[%u] sect[%u] \n", + (u32)block, track, cyl, head, sect); + + /* Check whether the converted CHS can fit. + Cylinder: 0-65535 + Head: 0-15 + Sector: 1-255*/ + if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) + return 1; + + qc->nsect = n_block; + tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ + tf->lbal = sect; + tf->lbam = cyl; + tf->lbah = cyl >> 8; + tf->device |= head; + } + + return 0; } static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) @@ -1167,10 +1231,20 @@ unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf, VPRINTK("ENTER\n"); - if (ata_id_has_lba48(args->id)) - n_sectors = ata_id_u64(args->id, 100); - else - n_sectors = ata_id_u32(args->id, 60); + if (ata_id_has_lba(args->id)) { + if (ata_id_has_lba48(args->id)) + n_sectors = ata_id_u64(args->id, 100); + else + n_sectors = ata_id_u32(args->id, 60); + } else { + /* CHS default translation */ + n_sectors = args->id[1] * args->id[3] * args->id[6]; + + if (ata_id_current_chs_valid(args->id)) + /* CHS current translation */ + n_sectors = ata_id_u32(args->id, 57); + } + n_sectors--; /* ATA TotalUserSectors - 1 */ tmp = n_sectors; /* note: truncates, if lba48 */ diff --git a/include/linux/ata.h b/include/linux/ata.h index f178894edd04..d8981402cd5b 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -125,6 +125,7 @@ enum { ATA_CMD_PACKET = 0xA0, ATA_CMD_VERIFY = 0x40, ATA_CMD_VERIFY_EXT = 0x42, + ATA_CMD_INIT_DEV_PARAMS = 0x91, /* SETFEATURES stuff */ SETFEATURES_XFER = 0x03, @@ -174,6 +175,7 @@ enum { ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */ ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */ ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */ + ATA_TFLAG_LBA = (1 << 4), /* enable LBA */ }; enum ata_tf_protocols { @@ -242,6 +244,18 @@ struct ata_taskfile { ((u64) (id)[(n) + 1] << 16) | \ ((u64) (id)[(n) + 0]) ) +static inline int ata_id_current_chs_valid(u16 *id) +{ + /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command + has not been issued to the device then the values of + id[54] to id[56] are vendor specific. */ + return (id[53] & 0x01) && /* Current translation valid */ + id[54] && /* cylinders in current translation */ + id[55] && /* heads in current translation */ + id[55] <= 16 && + id[56]; /* sectors in current translation */ +} + static inline int atapi_cdb_len(u16 *dev_id) { u16 tmp = dev_id[0] & 0x3; diff --git a/include/linux/libata.h b/include/linux/libata.h index 505160ab472b..bd0df84cfd87 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -95,6 +95,7 @@ enum { ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */ ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */ ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */ + ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */ ATA_DEV_UNKNOWN = 0, /* unknown device */ ATA_DEV_ATA = 1, /* ATA device */ @@ -278,6 +279,11 @@ struct ata_device { u8 xfer_protocol; /* taskfile xfer protocol */ u8 read_cmd; /* opcode to use on read */ u8 write_cmd; /* opcode to use on write */ + + /* for CHS addressing */ + u16 cylinders; /* Number of cylinders */ + u16 heads; /* Number of heads */ + u16 sectors; /* Number of sectors per track */ }; struct ata_port { From edb3366703224d5d8df573ae698ccd6b488dc743 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 28 Jul 2005 10:36:22 +0900 Subject: [PATCH 02/59] [PATCH] SATA: rewritten sil24 driver This is rewritten sil24 driver against v2.6.13-rc3. Rewritten based on driver originally submitted by Silicon Image. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/Kconfig | 8 + drivers/scsi/Makefile | 1 + drivers/scsi/sata_sil24.c | 786 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 795 insertions(+) create mode 100644 drivers/scsi/sata_sil24.c diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 96df148ed969..939d3442c13a 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -499,6 +499,14 @@ config SCSI_SATA_SIL If unsure, say N. +config SCSI_SATA_SIL24 + tristate "Silicon Image 3124/3132 SATA support" + depends on SCSI_SATA && PCI && EXPERIMENTAL + help + This option enables support for Silicon Image 3124/3132 Serial ATA. + + If unsure, say N. + config SCSI_SATA_SIS tristate "SiS 964/180 SATA support" depends on SCSI_SATA && PCI && EXPERIMENTAL diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 3746fb9fa2f5..64aaab64aeb6 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -126,6 +126,7 @@ obj-$(CONFIG_SCSI_ATA_PIIX) += libata.o ata_piix.o obj-$(CONFIG_SCSI_SATA_PROMISE) += libata.o sata_promise.o obj-$(CONFIG_SCSI_SATA_QSTOR) += libata.o sata_qstor.o obj-$(CONFIG_SCSI_SATA_SIL) += libata.o sata_sil.o +obj-$(CONFIG_SCSI_SATA_SIL24) += libata.o sata_sil24.o obj-$(CONFIG_SCSI_SATA_VIA) += libata.o sata_via.o obj-$(CONFIG_SCSI_SATA_VITESSE) += libata.o sata_vsc.o obj-$(CONFIG_SCSI_SATA_SIS) += libata.o sata_sis.o diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c new file mode 100644 index 000000000000..9958bc10a258 --- /dev/null +++ b/drivers/scsi/sata_sil24.c @@ -0,0 +1,786 @@ +/* + * sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers + * + * Copyright 2005 Tejun Heo + * + * Based on preview driver from Silicon Image. + * + * NOTE: No NCQ/ATAPI support yet. The preview driver didn't support + * NCQ nor ATAPI, and, unfortunately, I couldn't find out how to make + * those work. Enabling those shouldn't be difficult. Basic + * structure is all there (in libata-dev tree). If you have any + * information about this hardware, please contact me or linux-ide. + * Info is needed on... + * + * - How to issue tagged commands and turn on sactive on issue accordingly. + * - Where to put an ATAPI command and how to tell the device to send it. + * - How to enable/use 64bit. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "scsi.h" +#include +#include + +#define DRV_NAME "sata_sil24" +#define DRV_VERSION "0.20" /* Silicon Image's preview driver was 0.10 */ + +#define NR_PORTS 4 + +/* + * Port request block (PRB) 32 bytes + */ +struct sil24_prb { + u16 ctrl; + u16 prot; + u32 rx_cnt; + u8 fis[6 * 4]; +}; + +/* + * Scatter gather entry (SGE) 16 bytes + */ +struct sil24_sge { + u64 addr; + u32 cnt; + u32 flags; +}; + +/* + * Port multiplier + */ +struct sil24_port_multiplier { + u32 diag; + u32 sactive; +}; + +enum { + /* + * Global controller registers (128 bytes @ BAR0) + */ + /* 32 bit regs */ + HOST_SLOT_STAT = 0x00, /* 32 bit slot stat * 4 */ + HOST_CTRL = 0x40, + HOST_IRQ_STAT = 0x44, + HOST_PHY_CFG = 0x48, + HOST_BIST_CTRL = 0x50, + HOST_BIST_PTRN = 0x54, + HOST_BIST_STAT = 0x58, + HOST_MEM_BIST_STAT = 0x5c, + HOST_FLASH_CMD = 0x70, + /* 8 bit regs */ + HOST_FLASH_DATA = 0x74, + HOST_TRANSITION_DETECT = 0x75, + HOST_GPIO_CTRL = 0x76, + HOST_I2C_ADDR = 0x78, /* 32 bit */ + HOST_I2C_DATA = 0x7c, + HOST_I2C_XFER_CNT = 0x7e, + HOST_I2C_CTRL = 0x7f, + + /* HOST_SLOT_STAT bits */ + HOST_SSTAT_ATTN = (1 << 31), + + /* + * Port registers + * (8192 bytes @ +0x0000, +0x2000, +0x4000 and +0x6000 @ BAR2) + */ + PORT_REGS_SIZE = 0x2000, + PORT_PRB = 0x0000, /* (32 bytes PRB + 16 bytes SGEs * 6) * 31 (3968 bytes) */ + /* TF is overlayed w/ PRB regs in the preview driver, + * but it doesn't seem to work. */ + PORT_TF = 0x0000, + + PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */ + /* 32 bit regs */ + PORT_CTRL_STAT = 0x1000, /* write:ctrl, read:stat */ + PORT_CTRL_CLR = 0x1004, + PORT_IRQ_STAT = 0x1008, + PORT_IRQ_ENABLE_SET = 0x1010, + PORT_IRQ_ENABLE_CLR = 0x1014, + PORT_ACTIVATE_UPPER_ADDR= 0x101c, + PORT_EXEC_FIFO = 0x1020, + PORT_CMD_ERR = 0x1024, + PORT_FIS_CFG = 0x1028, + PORT_FIFO_THRES = 0x102c, + /* 16 bit regs */ + PORT_DECODE_ERR_CNT = 0x1040, + PORT_DECODE_ERR_THRESH = 0x1042, + PORT_CRC_ERR_CNT = 0x1044, + PORT_CRC_ERR_THRESH = 0x1046, + PORT_HSHK_ERR_CNT = 0x1048, + PORT_HSHK_ERR_THRESH = 0x104a, + /* 32 bit regs */ + PORT_PHY_CFG = 0x1050, + PORT_SLOT_STAT = 0x1800, + PORT_CMD_ACTIVATE = 0x1c00, /* 64 bit cmd activate * 31 (248 bytes) */ + PORT_EXEC_DIAG = 0x1e00, /* 32bit exec diag * 16 (64 bytes, 0-10 used on 3124) */ + PORT_PSD_DIAG = 0x1e40, /* 32bit psd diag * 16 (64 bytes, 0-8 used on 3124) */ + PORT_SCONTROL = 0x1f00, + PORT_SSTATUS = 0x1f04, + PORT_SERROR = 0x1f08, + PORT_SACTIVE = 0x1f0c, + + /* PORT_CTRL_STAT bits */ + PORT_CS_PORT_RST = (1 << 0), /* port reset */ + PORT_CS_DEV_RST = (1 << 1), /* device reset */ + PORT_CS_INIT = (1 << 2), /* port initialize */ + PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */ + PORT_CS_RESUME = (1 << 4), /* port resume */ + PORT_CS_32BIT_ACTV = (1 << 5), /* 32-bit activation */ + PORT_CS_PM_EN = (1 << 6), /* port multiplier enable */ + PORT_CS_RDY = (1 << 7), /* port ready to accept commands */ + + /* PORT_IRQ_STAT/ENABLE_SET/CLR */ + /* bits[11:0] are masked */ + PORT_IRQ_COMPLETE = (1 << 0), /* command(s) completed */ + PORT_IRQ_ERROR = (1 << 1), /* command execution error */ + PORT_IRQ_PORTRDY_CHG = (1 << 2), /* port ready change */ + PORT_IRQ_PWR_CHG = (1 << 3), /* power management change */ + PORT_IRQ_PHYRDY_CHG = (1 << 4), /* PHY ready change */ + PORT_IRQ_COMWAKE = (1 << 5), /* COMWAKE received */ + PORT_IRQ_UNK_FIS = (1 << 6), /* Unknown FIS received */ + PORT_IRQ_SDB_FIS = (1 << 11), /* SDB FIS received */ + + /* bits[27:16] are unmasked (raw) */ + PORT_IRQ_RAW_SHIFT = 16, + PORT_IRQ_MASKED_MASK = 0x7ff, + PORT_IRQ_RAW_MASK = (0x7ff << PORT_IRQ_RAW_SHIFT), + + /* ENABLE_SET/CLR specific, intr steering - 2 bit field */ + PORT_IRQ_STEER_SHIFT = 30, + PORT_IRQ_STEER_MASK = (3 << PORT_IRQ_STEER_SHIFT), + + /* PORT_CMD_ERR constants */ + PORT_CERR_DEV = 1, /* Error bit in D2H Register FIS */ + PORT_CERR_SDB = 2, /* Error bit in SDB FIS */ + PORT_CERR_DATA = 3, /* Error in data FIS not detected by dev */ + PORT_CERR_SEND = 4, /* Initial cmd FIS transmission failure */ + PORT_CERR_INCONSISTENT = 5, /* Protocol mismatch */ + PORT_CERR_DIRECTION = 6, /* Data direction mismatch */ + PORT_CERR_UNDERRUN = 7, /* Ran out of SGEs while writing */ + PORT_CERR_OVERRUN = 8, /* Ran out of SGEs while reading */ + PORT_CERR_PKT_PROT = 11, /* DIR invalid in 1st PIO setup of ATAPI */ + PORT_CERR_SGT_BOUNDARY = 16, /* PLD ecode 00 - SGT not on qword boundary */ + PORT_CERR_SGT_TGTABRT = 17, /* PLD ecode 01 - target abort */ + PORT_CERR_SGT_MSTABRT = 18, /* PLD ecode 10 - master abort */ + PORT_CERR_SGT_PCIPERR = 19, /* PLD ecode 11 - PCI parity err while fetching SGT */ + PORT_CERR_CMD_BOUNDARY = 24, /* ctrl[15:13] 001 - PRB not on qword boundary */ + PORT_CERR_CMD_TGTABRT = 25, /* ctrl[15:13] 010 - target abort */ + PORT_CERR_CMD_MSTABRT = 26, /* ctrl[15:13] 100 - master abort */ + PORT_CERR_CMD_PCIPERR = 27, /* ctrl[15:13] 110 - PCI parity err while fetching PRB */ + PORT_CERR_XFR_UNDEF = 32, /* PSD ecode 00 - undefined */ + PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */ + PORT_CERR_XFR_MSGABRT = 34, /* PSD ecode 10 - master abort */ + PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */ + PORT_CERR_SENDSERVICE = 36, /* FIS received whiel sending service */ + + /* + * Other constants + */ + SGE_TRM = (1 << 31), /* Last SGE in chain */ + PRB_SOFT_RST = (1 << 7), /* Soft reset request (ign BSY?) */ + + /* board id */ + BID_SIL3124 = 0, + BID_SIL3132 = 1, + + IRQ_STAT_4PORTS = 0xf, +}; + +struct sil24_cmd_block { + struct sil24_prb prb; + struct sil24_sge sge[LIBATA_MAX_PRD]; +}; + +/* + * ap->private_data + * + * The preview driver always returned 0 for status. We emulate it + * here from the previous interrupt. + */ +struct sil24_port_priv { + void *port; + struct sil24_cmd_block *cmd_block; /* 32 cmd blocks */ + dma_addr_t cmd_block_dma; /* DMA base addr for them */ +}; + +/* ap->host_set->private_data */ +struct sil24_host_priv { + void *host_base; /* global controller control (128 bytes @BAR0) */ + void *port_base; /* port registers (4 * 8192 bytes @BAR2) */ +}; + +static u8 sil24_check_status(struct ata_port *ap); +static u8 sil24_check_err(struct ata_port *ap); +static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg); +static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val); +static void sil24_phy_reset(struct ata_port *ap); +static void sil24_qc_prep(struct ata_queued_cmd *qc); +static int sil24_qc_issue(struct ata_queued_cmd *qc); +static void sil24_irq_clear(struct ata_port *ap); +static void sil24_eng_timeout(struct ata_port *ap); +static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static int sil24_port_start(struct ata_port *ap); +static void sil24_port_stop(struct ata_port *ap); +static void sil24_host_stop(struct ata_host_set *host_set); +static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); + +static struct pci_device_id sil24_pci_tbl[] = { + { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 }, + { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 }, +}; + +static struct pci_driver sil24_pci_driver = { + .name = DRV_NAME, + .id_table = sil24_pci_tbl, + .probe = sil24_init_one, + .remove = ata_pci_remove_one, /* safe? */ +}; + +static Scsi_Host_Template sil24_sht = { + .module = THIS_MODULE, + .name = DRV_NAME, + .ioctl = ata_scsi_ioctl, + .queuecommand = ata_scsi_queuecmd, + .eh_strategy_handler = ata_scsi_error, + .can_queue = ATA_DEF_QUEUE, + .this_id = ATA_SHT_THIS_ID, + .sg_tablesize = LIBATA_MAX_PRD, + .max_sectors = ATA_MAX_SECTORS, + .cmd_per_lun = ATA_SHT_CMD_PER_LUN, + .emulated = ATA_SHT_EMULATED, + .use_clustering = ATA_SHT_USE_CLUSTERING, + .proc_name = DRV_NAME, + .dma_boundary = ATA_DMA_BOUNDARY, + .slave_configure = ata_scsi_slave_config, + .bios_param = ata_std_bios_param, + .ordered_flush = 1, /* NCQ not supported yet */ +}; + +static struct ata_port_operations sil24_ops = { + .port_disable = ata_port_disable, + + .check_status = sil24_check_status, + .check_altstatus = sil24_check_status, + .check_err = sil24_check_err, + .dev_select = ata_noop_dev_select, + + .phy_reset = sil24_phy_reset, + + .qc_prep = sil24_qc_prep, + .qc_issue = sil24_qc_issue, + + .eng_timeout = sil24_eng_timeout, + + .irq_handler = sil24_interrupt, + .irq_clear = sil24_irq_clear, + + .scr_read = sil24_scr_read, + .scr_write = sil24_scr_write, + + .port_start = sil24_port_start, + .port_stop = sil24_port_stop, + .host_stop = sil24_host_stop, +}; + +static struct ata_port_info sil24_port_info[] = { + /* sil_3124 */ + { + .sht = &sil24_sht, + .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | + ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | + ATA_FLAG_PIO_DMA, + .pio_mask = 0x1f, /* pio0-4 */ + .mwdma_mask = 0x07, /* mwdma0-2 */ + .udma_mask = 0x3f, /* udma0-5 */ + .port_ops = &sil24_ops, + }, + /* sil_3132 */ + { + .sht = &sil24_sht, + .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | + ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | + ATA_FLAG_PIO_DMA, + .pio_mask = 0x1f, /* pio0-4 */ + .mwdma_mask = 0x07, /* mwdma0-2 */ + .udma_mask = 0x3f, /* udma0-5 */ + .port_ops = &sil24_ops, + }, +}; + +static u8 sil24_check_status(struct ata_port *ap) +{ + return ATA_DRDY; +} + +static u8 sil24_check_err(struct ata_port *ap) +{ + return 0; +} + +static int sil24_scr_map[] = { + [SCR_CONTROL] = 0, + [SCR_STATUS] = 1, + [SCR_ERROR] = 2, + [SCR_ACTIVE] = 3, +}; + +static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg) +{ + void *scr_addr = (void *)ap->ioaddr.scr_addr; + if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { + void *addr; + addr = scr_addr + sil24_scr_map[sc_reg] * 4; + return readl(scr_addr + sil24_scr_map[sc_reg] * 4); + } + return 0xffffffffU; +} + +static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) +{ + void *scr_addr = (void *)ap->ioaddr.scr_addr; + if (sc_reg < ARRAY_SIZE(sil24_scr_map)) { + void *addr; + addr = scr_addr + sil24_scr_map[sc_reg] * 4; + writel(val, scr_addr + sil24_scr_map[sc_reg] * 4); + } +} + +static void sil24_phy_reset(struct ata_port *ap) +{ + __sata_phy_reset(ap); + /* + * No ATAPI yet. Just unconditionally indicate ATA device. + * If ATAPI device is attached, it will fail ATA_CMD_ID_ATA + * and libata core will ignore the device. + */ + if (!(ap->flags & ATA_FLAG_PORT_DISABLED)) + ap->device[0].class = ATA_DEV_ATA; +} + +static inline void sil24_fill_sg(struct ata_queued_cmd *qc, + struct sil24_cmd_block *cb) +{ + struct scatterlist *sg = qc->sg; + struct sil24_sge *sge = cb->sge; + unsigned i; + + for (i = 0; i < qc->n_elem; i++, sg++, sge++) { + sge->addr = cpu_to_le64(sg_dma_address(sg)); + sge->cnt = cpu_to_le32(sg_dma_len(sg)); + sge->flags = 0; + sge->flags = i < qc->n_elem - 1 ? 0 : cpu_to_le32(SGE_TRM); + } +} + +static void sil24_qc_prep(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct sil24_port_priv *pp = ap->private_data; + struct sil24_cmd_block *cb = pp->cmd_block + qc->tag; + struct sil24_prb *prb = &cb->prb; + + switch (qc->tf.protocol) { + case ATA_PROT_PIO: + case ATA_PROT_DMA: + case ATA_PROT_NODATA: + break; + default: + /* ATAPI isn't supported yet */ + BUG(); + } + + ata_tf_to_fis(&qc->tf, prb->fis, 0); + + if (qc->flags & ATA_QCFLAG_DMAMAP) + sil24_fill_sg(qc, cb); +} + +static int sil24_qc_issue(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct sil24_port_priv *pp = ap->private_data; + dma_addr_t paddr = pp->cmd_block_dma + qc->tag * sizeof(*pp->cmd_block); + + writel((u32)paddr, pp->port + PORT_CMD_ACTIVATE); + return 0; +} + +static void sil24_irq_clear(struct ata_port *ap) +{ + /* unused */ +} + +static void sil24_reset_controller(struct ata_port *ap) +{ + struct sil24_port_priv *pp = ap->private_data; + void *port = pp->port; + int cnt; + u32 tmp; + + printk(KERN_NOTICE DRV_NAME + " ata%u: resetting controller...\n", ap->id); + + /* Reset controller state. Is this correct? */ + writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); + readl(port + PORT_CTRL_STAT); /* sync */ + + /* Max ~100ms */ + for (cnt = 0; cnt < 1000; cnt++) { + udelay(100); + tmp = readl(port + PORT_CTRL_STAT); + if (!(tmp & PORT_CS_DEV_RST)) + break; + } + if (tmp & PORT_CS_DEV_RST) + printk(KERN_ERR DRV_NAME + " ata%u: failed to reset controller\n", ap->id); +} + +static void sil24_eng_timeout(struct ata_port *ap) +{ + struct ata_queued_cmd *qc; + + qc = ata_qc_from_tag(ap, ap->active_tag); + if (!qc) { + printk(KERN_ERR "ata%u: BUG: tiemout without command\n", + ap->id); + return; + } + + /* + * hack alert! We cannot use the supplied completion + * function from inside the ->eh_strategy_handler() thread. + * libata is the only user of ->eh_strategy_handler() in + * any kernel, so the default scsi_done() assumes it is + * not being called from the SCSI EH. + */ + printk(KERN_ERR "ata%u: command timeout\n", ap->id); + qc->scsidone = scsi_finish_command; + ata_qc_complete(qc, ATA_ERR); + + sil24_reset_controller(ap); +} + +static inline void sil24_host_intr(struct ata_port *ap) +{ + struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); + struct sil24_port_priv *pp = ap->private_data; + void *port = pp->port; + u32 slot_stat; + + slot_stat = readl(port + PORT_SLOT_STAT); + if (!(slot_stat & HOST_SSTAT_ATTN)) { + if (qc) + ata_qc_complete(qc, 0); + } else { + u32 irq_stat, cmd_err, sstatus, serror; + + irq_stat = readl(port + PORT_IRQ_STAT); + cmd_err = readl(port + PORT_CMD_ERR); + sstatus = readl(port + PORT_SSTATUS); + serror = readl(port + PORT_SERROR); + + /* Clear IRQ/errors */ + writel(irq_stat, port + PORT_IRQ_STAT); + if (cmd_err) + writel(cmd_err, port + PORT_CMD_ERR); + if (serror) + writel(serror, port + PORT_SERROR); + + printk(KERN_ERR DRV_NAME " ata%u: error interrupt on port%d\n" + " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n", + ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror); + + if (qc) + ata_qc_complete(qc, ATA_ERR); + + sil24_reset_controller(ap); + } +} + +static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs) +{ + struct ata_host_set *host_set = dev_instance; + struct sil24_host_priv *hpriv = host_set->private_data; + unsigned handled = 0; + u32 status; + int i; + + status = readl(hpriv->host_base + HOST_IRQ_STAT); + + if (!(status & IRQ_STAT_4PORTS)) + goto out; + + spin_lock(&host_set->lock); + + for (i = 0; i < host_set->n_ports; i++) + if (status & (1 << i)) { + struct ata_port *ap = host_set->ports[i]; + if (ap && !(ap->flags & ATA_FLAG_PORT_DISABLED)) + sil24_host_intr(host_set->ports[i]); + else { + u32 tmp; + printk(KERN_WARNING DRV_NAME + ": spurious interrupt from port %d\n", i); + tmp = readl(hpriv->host_base + HOST_CTRL); + tmp &= ~(1 << i); + writel(tmp, hpriv->host_base + HOST_CTRL); + } + handled++; + } + + spin_unlock(&host_set->lock); + out: + return IRQ_RETVAL(handled); +} + +static int sil24_port_start(struct ata_port *ap) +{ + struct device *dev = ap->host_set->dev; + struct sil24_host_priv *hpriv = ap->host_set->private_data; + struct sil24_port_priv *pp; + struct sil24_cmd_block *cb; + size_t cb_size = sizeof(*cb); + dma_addr_t cb_dma; + + pp = kmalloc(sizeof(*pp), GFP_KERNEL); + if (!pp) + return -ENOMEM; + memset(pp, 0, sizeof(*pp)); + + cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); + if (!cb) { + kfree(pp); + return -ENOMEM; + } + memset(cb, 0, cb_size); + + pp->port = hpriv->port_base + ap->port_no * PORT_REGS_SIZE; + pp->cmd_block = cb; + pp->cmd_block_dma = cb_dma; + + ap->private_data = pp; + + return 0; +} + +static void sil24_port_stop(struct ata_port *ap) +{ + struct device *dev = ap->host_set->dev; + struct sil24_port_priv *pp = ap->private_data; + size_t cb_size = sizeof(*pp->cmd_block); + + dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma); + kfree(pp); +} + +static void sil24_host_stop(struct ata_host_set *host_set) +{ + struct sil24_host_priv *hpriv = host_set->private_data; + + iounmap(hpriv->host_base); + iounmap(hpriv->port_base); + kfree(hpriv); +} + +static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + static int printed_version = 0; + unsigned int board_id = (unsigned int)ent->driver_data; + struct ata_probe_ent *probe_ent = NULL; + struct sil24_host_priv *hpriv = NULL; + void *host_base = NULL, *port_base = NULL; + int i, rc; + + if (!printed_version++) + printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); + + rc = pci_enable_device(pdev); + if (rc) + return rc; + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto out_disable; + + rc = -ENOMEM; + /* ioremap mmio registers */ + host_base = ioremap(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (!host_base) + goto out_free; + port_base = ioremap(pci_resource_start(pdev, 2), + pci_resource_len(pdev, 2)); + if (!port_base) + goto out_free; + + /* allocate & init probe_ent and hpriv */ + probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); + if (!probe_ent) + goto out_free; + + hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL); + if (!hpriv) + goto out_free; + + memset(probe_ent, 0, sizeof(*probe_ent)); + probe_ent->dev = pci_dev_to_dev(pdev); + INIT_LIST_HEAD(&probe_ent->node); + + probe_ent->sht = sil24_port_info[board_id].sht; + probe_ent->host_flags = sil24_port_info[board_id].host_flags; + probe_ent->pio_mask = sil24_port_info[board_id].pio_mask; + probe_ent->udma_mask = sil24_port_info[board_id].udma_mask; + probe_ent->port_ops = sil24_port_info[board_id].port_ops; + probe_ent->n_ports = (board_id == BID_SIL3124) ? 4 : 2; + + probe_ent->irq = pdev->irq; + probe_ent->irq_flags = SA_SHIRQ; + probe_ent->mmio_base = port_base; + probe_ent->private_data = hpriv; + + memset(hpriv, 0, sizeof(*hpriv)); + hpriv->host_base = host_base; + hpriv->port_base = port_base; + + /* + * Configure the device + */ + /* + * FIXME: This device is certainly 64-bit capable. We just + * don't know how to use it. After fixing 32bit activation in + * this function, enable 64bit masks here. + */ + rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + printk(KERN_ERR DRV_NAME "(%s): 32-bit DMA enable failed\n", + pci_name(pdev)); + goto out_free; + } + rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + printk(KERN_ERR DRV_NAME "(%s): 32-bit consistent DMA enable failed\n", + pci_name(pdev)); + goto out_free; + } + + /* GPIO off */ + writel(0, host_base + HOST_FLASH_CMD); + + /* Mask interrupts during initialization */ + writel(0, host_base + HOST_CTRL); + + for (i = 0; i < probe_ent->n_ports; i++) { + void *port = port_base + i * PORT_REGS_SIZE; + unsigned long portu = (unsigned long)port; + u32 tmp; + int cnt; + + probe_ent->port[i].cmd_addr = portu + PORT_TF; + probe_ent->port[i].ctl_addr = portu + PORT_TF + 0xa; + probe_ent->port[i].altstatus_addr = portu + PORT_TF + 0xa; + probe_ent->port[i].scr_addr = portu + PORT_SCONTROL; + + ata_std_ports(&probe_ent->port[i]); + + /* Initial PHY setting */ + writel(0x20c, port + PORT_PHY_CFG); + + /* Clear port RST */ + tmp = readl(port + PORT_CTRL_STAT); + if (tmp & PORT_CS_PORT_RST) { + writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR); + readl(port + PORT_CTRL_STAT); /* sync */ + for (cnt = 0; cnt < 10; cnt++) { + msleep(10); + tmp = readl(port + PORT_CTRL_STAT); + if (!(tmp & PORT_CS_PORT_RST)) + break; + } + if (tmp & PORT_CS_PORT_RST) + printk(KERN_ERR DRV_NAME + "(%s): failed to clear port RST\n", + pci_name(pdev)); + } + + /* Zero error counters. */ + writel(0x8000, port + PORT_DECODE_ERR_THRESH); + writel(0x8000, port + PORT_CRC_ERR_THRESH); + writel(0x8000, port + PORT_HSHK_ERR_THRESH); + writel(0x0000, port + PORT_DECODE_ERR_CNT); + writel(0x0000, port + PORT_CRC_ERR_CNT); + writel(0x0000, port + PORT_HSHK_ERR_CNT); + + /* FIXME: 32bit activation? */ + writel(0, port + PORT_ACTIVATE_UPPER_ADDR); + writel(PORT_CS_32BIT_ACTV, port + PORT_CTRL_STAT); + + /* Configure interrupts */ + writel(0xffff, port + PORT_IRQ_ENABLE_CLR); + writel(PORT_IRQ_COMPLETE | PORT_IRQ_ERROR | PORT_IRQ_SDB_FIS, + port + PORT_IRQ_ENABLE_SET); + + /* Clear interrupts */ + writel(0x0fff0fff, port + PORT_IRQ_STAT); + writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); + } + + /* Turn on interrupts */ + writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL); + + pci_set_master(pdev); + + ata_device_add(probe_ent); + + kfree(probe_ent); + return 0; + + out_free: + if (host_base) + iounmap(host_base); + if (port_base) + iounmap(port_base); + kfree(probe_ent); + kfree(hpriv); + pci_release_regions(pdev); + out_disable: + pci_disable_device(pdev); + return rc; +} + +static int __init sil24_init(void) +{ + return pci_module_init(&sil24_pci_driver); +} + +static void __exit sil24_exit(void) +{ + pci_unregister_driver(&sil24_pci_driver); +} + +MODULE_AUTHOR("Tejun Heo"); +MODULE_DESCRIPTION("Silicon Image 3124/3132 SATA low-level driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, sil24_pci_tbl); + +module_init(sil24_init); +module_exit(sil24_exit); From 1483467faa0170cf401955b3d8d3486ea0fe802d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:08:42 +0900 Subject: [PATCH 03/59] [PATCH] sil24: add FIXME comment above ata_device_add 01_sil24_add-FIXME-comment.patch Add FIXME comment above ata_device_add. Signed-off-by: Tejun Heo sata_sil24.c | 1 + 1 files changed, 1 insertion(+) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 9958bc10a258..4868ad79b92e 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -749,6 +749,7 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) pci_set_master(pdev); + /* FIXME: check ata_device_add return value */ ata_device_add(probe_ent); kfree(probe_ent); From 3cc4571c4106735665e048850ff6656de9558d60 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:08:47 +0900 Subject: [PATCH 04/59] [PATCH] sil24: remove irq disable code on spurious interrupt 02_sil24_remove-irq-disable-on-spurious-intr.patch If interrupt occurs on a disabled port, the driver used to mask the port's interrupt, but we don't know if such action is necessary yet and that's not what other drives do. So, just do nothing and tell IRQ subsystem that it's not our interrupt. Signed-off-by: Tejun Heo sata_sil24.c | 15 +++++---------- 1 files changed, 5 insertions(+), 10 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 4868ad79b92e..0f810cdd3cc2 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -535,17 +535,12 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs * for (i = 0; i < host_set->n_ports; i++) if (status & (1 << i)) { struct ata_port *ap = host_set->ports[i]; - if (ap && !(ap->flags & ATA_FLAG_PORT_DISABLED)) + if (ap && !(ap->flags & ATA_FLAG_PORT_DISABLED)) { sil24_host_intr(host_set->ports[i]); - else { - u32 tmp; - printk(KERN_WARNING DRV_NAME - ": spurious interrupt from port %d\n", i); - tmp = readl(hpriv->host_base + HOST_CTRL); - tmp &= ~(1 << i); - writel(tmp, hpriv->host_base + HOST_CTRL); - } - handled++; + handled++; + } else + printk(KERN_ERR DRV_NAME + ": interrupt from disabled port %d\n", i); } spin_unlock(&host_set->lock); From 06460aeaa26ed4a86b92c8451365d3f48abd3786 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:08:52 +0900 Subject: [PATCH 05/59] [PATCH] sil24: add testing for PCI fault 03_sil24_add-pci-fault-check.patch On entry to interrupt handler, PORT_SLOT_STAT register is read first. Check if PCI fault or device removal has occurred by testing the value for 0xffffffff. Signed-off-by: Tejun Heo sata_sil24.c | 6 ++++++ 1 files changed, 6 insertions(+) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 0f810cdd3cc2..c9318bda46a3 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -527,6 +527,12 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs * status = readl(hpriv->host_base + HOST_IRQ_STAT); + if (status == 0xffffffff) { + printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, " + "PCI fault or device removal?\n"); + goto out; + } + if (!(status & IRQ_STAT_4PORTS)) goto out; From 8746618d4f18fab25916686b0d8a6be2c2912de1 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:08:57 +0900 Subject: [PATCH 06/59] [PATCH] sil24: move error handling out of hot interrupt path 04_sil24_add-error_intr-function.patch Move error handling from sil24_host_intr into separate function - sil24_error_intr. Signed-off-by: Tejun Heo sata_sil24.c | 55 +++++++++++++++++++++++++++++++------------------------ 1 files changed, 31 insertions(+), 24 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 55 ++++++++++++++++++++++----------------- 1 file changed, 31 insertions(+), 24 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index c9318bda46a3..6544226c1b28 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -480,6 +480,35 @@ static void sil24_eng_timeout(struct ata_port *ap) sil24_reset_controller(ap); } +static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) +{ + struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); + struct sil24_port_priv *pp = ap->private_data; + void *port = pp->port; + u32 irq_stat, cmd_err, sstatus, serror; + + irq_stat = readl(port + PORT_IRQ_STAT); + cmd_err = readl(port + PORT_CMD_ERR); + sstatus = readl(port + PORT_SSTATUS); + serror = readl(port + PORT_SERROR); + + /* Clear IRQ/errors */ + writel(irq_stat, port + PORT_IRQ_STAT); + if (cmd_err) + writel(cmd_err, port + PORT_CMD_ERR); + if (serror) + writel(serror, port + PORT_SERROR); + + printk(KERN_ERR DRV_NAME " ata%u: error interrupt on port%d\n" + " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n", + ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror); + + if (qc) + ata_qc_complete(qc, ATA_ERR); + + sil24_reset_controller(ap); +} + static inline void sil24_host_intr(struct ata_port *ap) { struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); @@ -491,30 +520,8 @@ static inline void sil24_host_intr(struct ata_port *ap) if (!(slot_stat & HOST_SSTAT_ATTN)) { if (qc) ata_qc_complete(qc, 0); - } else { - u32 irq_stat, cmd_err, sstatus, serror; - - irq_stat = readl(port + PORT_IRQ_STAT); - cmd_err = readl(port + PORT_CMD_ERR); - sstatus = readl(port + PORT_SSTATUS); - serror = readl(port + PORT_SERROR); - - /* Clear IRQ/errors */ - writel(irq_stat, port + PORT_IRQ_STAT); - if (cmd_err) - writel(cmd_err, port + PORT_CMD_ERR); - if (serror) - writel(serror, port + PORT_SERROR); - - printk(KERN_ERR DRV_NAME " ata%u: error interrupt on port%d\n" - " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n", - ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror); - - if (qc) - ata_qc_complete(qc, ATA_ERR); - - sil24_reset_controller(ap); - } + } else + sil24_error_intr(ap, slot_stat); } static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs *regs) From 33d015b9f24d143859bb40dbe7bbb4c7805cee7d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:09:02 +0900 Subject: [PATCH 07/59] [PATCH] sil24: remove PORT_TF 05_sil24_remove-PORT_TF.patch Remove PORT_TF, as taskfile isn't located at PORT_TF. Signed-off-by: Tejun Heo sata_sil24.c | 7 +------ 1 files changed, 1 insertion(+), 6 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 6544226c1b28..47a7bfc4a6d8 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -104,9 +104,6 @@ enum { */ PORT_REGS_SIZE = 0x2000, PORT_PRB = 0x0000, /* (32 bytes PRB + 16 bytes SGEs * 6) * 31 (3968 bytes) */ - /* TF is overlayed w/ PRB regs in the preview driver, - * but it doesn't seem to work. */ - PORT_TF = 0x0000, PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */ /* 32 bit regs */ @@ -703,9 +700,7 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) u32 tmp; int cnt; - probe_ent->port[i].cmd_addr = portu + PORT_TF; - probe_ent->port[i].ctl_addr = portu + PORT_TF + 0xa; - probe_ent->port[i].altstatus_addr = portu + PORT_TF + 0xa; + probe_ent->port[i].cmd_addr = portu; probe_ent->port[i].scr_addr = portu + PORT_SCONTROL; ata_std_ports(&probe_ent->port[i]); From 4f50c3cbb4b608ae4d8ee73ce273d819d901a83f Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:09:07 +0900 Subject: [PATCH 08/59] [PATCH] sil24: replace pp->port w/ ap->ioaddr.cmd_addr 06_sil24_remove-pp-port.patch As ap->ioaddr.cmd_addr isn't used for PORT_TF anymore, replace pp->port w/ it as AHCI does. Signed-off-by: Tejun Heo sata_sil24.c | 17 ++++++----------- 1 files changed, 6 insertions(+), 11 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 47a7bfc4a6d8..547c29a5613b 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -214,7 +214,6 @@ struct sil24_cmd_block { * here from the previous interrupt. */ struct sil24_port_priv { - void *port; struct sil24_cmd_block *cmd_block; /* 32 cmd blocks */ dma_addr_t cmd_block_dma; /* DMA base addr for them */ }; @@ -414,10 +413,11 @@ static void sil24_qc_prep(struct ata_queued_cmd *qc) static int sil24_qc_issue(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; + void *port = (void *)ap->ioaddr.cmd_addr; struct sil24_port_priv *pp = ap->private_data; dma_addr_t paddr = pp->cmd_block_dma + qc->tag * sizeof(*pp->cmd_block); - writel((u32)paddr, pp->port + PORT_CMD_ACTIVATE); + writel((u32)paddr, port + PORT_CMD_ACTIVATE); return 0; } @@ -428,8 +428,7 @@ static void sil24_irq_clear(struct ata_port *ap) static void sil24_reset_controller(struct ata_port *ap) { - struct sil24_port_priv *pp = ap->private_data; - void *port = pp->port; + void *port = (void *)ap->ioaddr.cmd_addr; int cnt; u32 tmp; @@ -480,8 +479,7 @@ static void sil24_eng_timeout(struct ata_port *ap) static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) { struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); - struct sil24_port_priv *pp = ap->private_data; - void *port = pp->port; + void *port = (void *)ap->ioaddr.cmd_addr; u32 irq_stat, cmd_err, sstatus, serror; irq_stat = readl(port + PORT_IRQ_STAT); @@ -509,8 +507,7 @@ static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) static inline void sil24_host_intr(struct ata_port *ap) { struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); - struct sil24_port_priv *pp = ap->private_data; - void *port = pp->port; + void *port = (void *)ap->ioaddr.cmd_addr; u32 slot_stat; slot_stat = readl(port + PORT_SLOT_STAT); @@ -561,7 +558,6 @@ static irqreturn_t sil24_interrupt(int irq, void *dev_instance, struct pt_regs * static int sil24_port_start(struct ata_port *ap) { struct device *dev = ap->host_set->dev; - struct sil24_host_priv *hpriv = ap->host_set->private_data; struct sil24_port_priv *pp; struct sil24_cmd_block *cb; size_t cb_size = sizeof(*cb); @@ -579,7 +575,6 @@ static int sil24_port_start(struct ata_port *ap) } memset(cb, 0, cb_size); - pp->port = hpriv->port_base + ap->port_no * PORT_REGS_SIZE; pp->cmd_block = cb; pp->cmd_block_dma = cb_dma; @@ -700,7 +695,7 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) u32 tmp; int cnt; - probe_ent->port[i].cmd_addr = portu; + probe_ent->port[i].cmd_addr = portu + PORT_PRB; probe_ent->port[i].scr_addr = portu + PORT_SCONTROL; ata_std_ports(&probe_ent->port[i]); From e382eb1dbdb2dec69806a72551bcb4a736142f6d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:09:13 +0900 Subject: [PATCH 09/59] [PATCH] sil24: fix PORT_CTRL_STAT constants 07_sil24_fix-PORT_CTRL_STAT-constants.patch PORT_CTRL_STAT constants were copied incorrectly from the preview driver. Signed-off-by: Edward Falk sata_sil24.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 547c29a5613b..7a3d50dcd938 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -140,10 +140,10 @@ enum { PORT_CS_DEV_RST = (1 << 1), /* device reset */ PORT_CS_INIT = (1 << 2), /* port initialize */ PORT_CS_IRQ_WOC = (1 << 3), /* interrupt write one to clear */ - PORT_CS_RESUME = (1 << 4), /* port resume */ - PORT_CS_32BIT_ACTV = (1 << 5), /* 32-bit activation */ - PORT_CS_PM_EN = (1 << 6), /* port multiplier enable */ - PORT_CS_RDY = (1 << 7), /* port ready to accept commands */ + PORT_CS_RESUME = (1 << 6), /* port resume */ + PORT_CS_32BIT_ACTV = (1 << 10), /* 32-bit activation */ + PORT_CS_PM_EN = (1 << 13), /* port multiplier enable */ + PORT_CS_RDY = (1 << 31), /* port ready to accept commands */ /* PORT_IRQ_STAT/ENABLE_SET/CLR */ /* bits[11:0] are masked */ From 83bbecc905b3431c60fe282830e09aaaab97b26a Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 17 Aug 2005 13:09:18 +0900 Subject: [PATCH 10/59] [PATCH] sil24: add more comments for constants 08_sil24_add-comments-for-constants.patch Add more comments to constants. Signed-off-by: Edward Falk sata_sil24.c | 16 ++++++++-------- 1 files changed, 8 insertions(+), 8 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 7a3d50dcd938..cb91894471f2 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -107,14 +107,14 @@ enum { PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */ /* 32 bit regs */ - PORT_CTRL_STAT = 0x1000, /* write:ctrl, read:stat */ - PORT_CTRL_CLR = 0x1004, - PORT_IRQ_STAT = 0x1008, - PORT_IRQ_ENABLE_SET = 0x1010, - PORT_IRQ_ENABLE_CLR = 0x1014, + PORT_CTRL_STAT = 0x1000, /* write: ctrl-set, read: stat */ + PORT_CTRL_CLR = 0x1004, /* write: ctrl-clear */ + PORT_IRQ_STAT = 0x1008, /* high: status, low: interrupt */ + PORT_IRQ_ENABLE_SET = 0x1010, /* write: enable-set */ + PORT_IRQ_ENABLE_CLR = 0x1014, /* write: enable-clear */ PORT_ACTIVATE_UPPER_ADDR= 0x101c, - PORT_EXEC_FIFO = 0x1020, - PORT_CMD_ERR = 0x1024, + PORT_EXEC_FIFO = 0x1020, /* command execution fifo */ + PORT_CMD_ERR = 0x1024, /* command error number */ PORT_FIS_CFG = 0x1028, PORT_FIFO_THRES = 0x102c, /* 16 bit regs */ @@ -187,7 +187,7 @@ enum { PORT_CERR_XFR_TGTABRT = 33, /* PSD ecode 01 - target abort */ PORT_CERR_XFR_MSGABRT = 34, /* PSD ecode 10 - master abort */ PORT_CERR_XFR_PCIPERR = 35, /* PSD ecode 11 - PCI prity err during transfer */ - PORT_CERR_SENDSERVICE = 36, /* FIS received whiel sending service */ + PORT_CERR_SENDSERVICE = 36, /* FIS received while sending service */ /* * Other constants From 923f122573851d18a3832ca808269fa2d5046fb1 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 13 Sep 2005 13:21:29 +0900 Subject: [PATCH 11/59] [PATCH] sil24: initialization fix sil24 0.20 didn't use to perform (what seems to be) port multiplier initialization and controller reset 0.10 driver does. This makes some sil24 controllers malfunction. This patch adds PM initialization and controller resetting to initilization and bumps version to 0.21. Please refer to the following thread for more information. http://marc.theaimsgroup.com/?l=linux-ide&m=112582819830324&w=2 http://marc.theaimsgroup.com/?l=linux-ide&m=112636045531060&w=2 Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 31 +++++++++++++++++++++++-------- 1 file changed, 23 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index cb91894471f2..d8a2f5f04e82 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -41,7 +41,7 @@ #include #define DRV_NAME "sata_sil24" -#define DRV_VERSION "0.20" /* Silicon Image's preview driver was 0.10 */ +#define DRV_VERSION "0.21" /* Silicon Image's preview driver was 0.10 */ #define NR_PORTS 4 @@ -426,15 +426,11 @@ static void sil24_irq_clear(struct ata_port *ap) /* unused */ } -static void sil24_reset_controller(struct ata_port *ap) +static int __sil24_reset_controller(void *port) { - void *port = (void *)ap->ioaddr.cmd_addr; int cnt; u32 tmp; - printk(KERN_NOTICE DRV_NAME - " ata%u: resetting controller...\n", ap->id); - /* Reset controller state. Is this correct? */ writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT); readl(port + PORT_CTRL_STAT); /* sync */ @@ -446,9 +442,19 @@ static void sil24_reset_controller(struct ata_port *ap) if (!(tmp & PORT_CS_DEV_RST)) break; } + if (tmp & PORT_CS_DEV_RST) - printk(KERN_ERR DRV_NAME - " ata%u: failed to reset controller\n", ap->id); + return -1; + return 0; +} + +static void sil24_reset_controller(struct ata_port *ap) +{ + printk(KERN_NOTICE DRV_NAME + " ata%u: resetting controller...\n", ap->id); + if (__sil24_reset_controller((void *)ap->ioaddr.cmd_addr)) + printk(KERN_ERR DRV_NAME + " ata%u: failed to reset controller\n", ap->id); } static void sil24_eng_timeout(struct ata_port *ap) @@ -740,6 +746,15 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) /* Clear interrupts */ writel(0x0fff0fff, port + PORT_IRQ_STAT); writel(PORT_CS_IRQ_WOC, port + PORT_CTRL_CLR); + + /* Clear port multiplier enable and resume bits */ + writel(PORT_CS_PM_EN | PORT_CS_RESUME, port + PORT_CTRL_CLR); + + /* Reset itself */ + if (__sil24_reset_controller(port)) + printk(KERN_ERR DRV_NAME + "(%s): failed to reset controller\n", + pci_name(pdev)); } /* Turn on interrupts */ From ee500aabf10323a7e313731b8c0be7c2c6dd27c7 Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Tue, 27 Sep 2005 17:34:38 +0800 Subject: [PATCH 12/59] [PATCH] libata: indent and whitespace change Signed-off-by: Albert Lee Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 2 +- drivers/scsi/sata_promise.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index e5b01997117a..cc68f5706acf 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -3586,7 +3586,7 @@ u8 ata_bmdma_status(struct ata_port *ap) void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; host_stat = readb(mmio + ATA_DMA_STATUS); } else - host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); + host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); return host_stat; } diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c index 538ad727bd2e..def7e0d9dacb 100644 --- a/drivers/scsi/sata_promise.c +++ b/drivers/scsi/sata_promise.c @@ -438,11 +438,11 @@ static inline unsigned int pdc_host_intr( struct ata_port *ap, break; default: - ap->stats.idle_irq++; - break; + ap->stats.idle_irq++; + break; } - return handled; + return handled; } static void pdc_irq_clear(struct ata_port *ap) From 14be71f4c5c5ad1e222c5202ee6d234e9c8828b7 Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Tue, 27 Sep 2005 17:36:35 +0800 Subject: [PATCH 13/59] [PATCH] libata: rename host states Changes: s/PIO_ST_/HSM_ST_/ and s/pio_task_state/hsm_task_state/. Signed-off-by: Albert Lee Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 76 +++++++++++++++++++------------------- include/linux/libata.h | 20 +++++----- 2 files changed, 48 insertions(+), 48 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index cc68f5706acf..c4fcdc30f18c 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -2425,20 +2425,20 @@ void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) static unsigned long ata_pio_poll(struct ata_port *ap) { u8 status; - unsigned int poll_state = PIO_ST_UNKNOWN; - unsigned int reg_state = PIO_ST_UNKNOWN; - const unsigned int tmout_state = PIO_ST_TMOUT; + unsigned int poll_state = HSM_ST_UNKNOWN; + unsigned int reg_state = HSM_ST_UNKNOWN; + const unsigned int tmout_state = HSM_ST_TMOUT; - switch (ap->pio_task_state) { - case PIO_ST: - case PIO_ST_POLL: - poll_state = PIO_ST_POLL; - reg_state = PIO_ST; + switch (ap->hsm_task_state) { + case HSM_ST: + case HSM_ST_POLL: + poll_state = HSM_ST_POLL; + reg_state = HSM_ST; break; - case PIO_ST_LAST: - case PIO_ST_LAST_POLL: - poll_state = PIO_ST_LAST_POLL; - reg_state = PIO_ST_LAST; + case HSM_ST_LAST: + case HSM_ST_LAST_POLL: + poll_state = HSM_ST_LAST_POLL; + reg_state = HSM_ST_LAST; break; default: BUG(); @@ -2448,14 +2448,14 @@ static unsigned long ata_pio_poll(struct ata_port *ap) status = ata_chk_status(ap); if (status & ATA_BUSY) { if (time_after(jiffies, ap->pio_task_timeout)) { - ap->pio_task_state = tmout_state; + ap->hsm_task_state = tmout_state; return 0; } - ap->pio_task_state = poll_state; + ap->hsm_task_state = poll_state; return ATA_SHORT_PAUSE; } - ap->pio_task_state = reg_state; + ap->hsm_task_state = reg_state; return 0; } @@ -2480,14 +2480,14 @@ static int ata_pio_complete (struct ata_port *ap) * we enter, BSY will be cleared in a chk-status or two. If not, * the drive is probably seeking or something. Snooze for a couple * msecs, then chk-status again. If still busy, fall back to - * PIO_ST_POLL state. + * HSM_ST_POLL state. */ drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); if (drv_stat & (ATA_BUSY | ATA_DRQ)) { msleep(2); drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); if (drv_stat & (ATA_BUSY | ATA_DRQ)) { - ap->pio_task_state = PIO_ST_LAST_POLL; + ap->hsm_task_state = HSM_ST_LAST_POLL; ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; return 0; } @@ -2495,14 +2495,14 @@ static int ata_pio_complete (struct ata_port *ap) drv_stat = ata_wait_idle(ap); if (!ata_ok(drv_stat)) { - ap->pio_task_state = PIO_ST_ERR; + ap->hsm_task_state = HSM_ST_ERR; return 0; } qc = ata_qc_from_tag(ap, ap->active_tag); assert(qc != NULL); - ap->pio_task_state = PIO_ST_IDLE; + ap->hsm_task_state = HSM_ST_IDLE; ata_poll_qc_complete(qc, drv_stat); @@ -2662,7 +2662,7 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) unsigned char *buf; if (qc->cursect == (qc->nsect - 1)) - ap->pio_task_state = PIO_ST_LAST; + ap->hsm_task_state = HSM_ST_LAST; page = sg[qc->cursg].page; offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; @@ -2712,7 +2712,7 @@ static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) unsigned int offset, count; if (qc->curbytes + bytes >= qc->nbytes) - ap->pio_task_state = PIO_ST_LAST; + ap->hsm_task_state = HSM_ST_LAST; next_sg: if (unlikely(qc->cursg >= qc->n_elem)) { @@ -2734,7 +2734,7 @@ next_sg: for (i = 0; i < words; i++) ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); - ap->pio_task_state = PIO_ST_LAST; + ap->hsm_task_state = HSM_ST_LAST; return; } @@ -2815,7 +2815,7 @@ static void atapi_pio_bytes(struct ata_queued_cmd *qc) err_out: printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", ap->id, dev->devno); - ap->pio_task_state = PIO_ST_ERR; + ap->hsm_task_state = HSM_ST_ERR; } /** @@ -2837,14 +2837,14 @@ static void ata_pio_block(struct ata_port *ap) * a chk-status or two. If not, the drive is probably seeking * or something. Snooze for a couple msecs, then * chk-status again. If still busy, fall back to - * PIO_ST_POLL state. + * HSM_ST_POLL state. */ status = ata_busy_wait(ap, ATA_BUSY, 5); if (status & ATA_BUSY) { msleep(2); status = ata_busy_wait(ap, ATA_BUSY, 10); if (status & ATA_BUSY) { - ap->pio_task_state = PIO_ST_POLL; + ap->hsm_task_state = HSM_ST_POLL; ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; return; } @@ -2856,7 +2856,7 @@ static void ata_pio_block(struct ata_port *ap) if (is_atapi_taskfile(&qc->tf)) { /* no more data to transfer or unsupported ATAPI command */ if ((status & ATA_DRQ) == 0) { - ap->pio_task_state = PIO_ST_LAST; + ap->hsm_task_state = HSM_ST_LAST; return; } @@ -2864,7 +2864,7 @@ static void ata_pio_block(struct ata_port *ap) } else { /* handle BSY=0, DRQ=0 as error */ if ((status & ATA_DRQ) == 0) { - ap->pio_task_state = PIO_ST_ERR; + ap->hsm_task_state = HSM_ST_ERR; return; } @@ -2884,7 +2884,7 @@ static void ata_pio_error(struct ata_port *ap) printk(KERN_WARNING "ata%u: PIO error, drv_stat 0x%x\n", ap->id, drv_stat); - ap->pio_task_state = PIO_ST_IDLE; + ap->hsm_task_state = HSM_ST_IDLE; ata_poll_qc_complete(qc, drv_stat | ATA_ERR); } @@ -2899,25 +2899,25 @@ fsm_start: timeout = 0; qc_completed = 0; - switch (ap->pio_task_state) { - case PIO_ST_IDLE: + switch (ap->hsm_task_state) { + case HSM_ST_IDLE: return; - case PIO_ST: + case HSM_ST: ata_pio_block(ap); break; - case PIO_ST_LAST: + case HSM_ST_LAST: qc_completed = ata_pio_complete(ap); break; - case PIO_ST_POLL: - case PIO_ST_LAST_POLL: + case HSM_ST_POLL: + case HSM_ST_LAST_POLL: timeout = ata_pio_poll(ap); break; - case PIO_ST_TMOUT: - case PIO_ST_ERR: + case HSM_ST_TMOUT: + case HSM_ST_ERR: ata_pio_error(ap); return; } @@ -3360,7 +3360,7 @@ int ata_qc_issue_prot(struct ata_queued_cmd *qc) case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ ata_qc_set_polling(qc); ata_tf_to_host_nolock(ap, &qc->tf); - ap->pio_task_state = PIO_ST; + ap->hsm_task_state = HSM_ST; queue_work(ata_wq, &ap->pio_task); break; @@ -3806,7 +3806,7 @@ static void atapi_packet_task(void *_data) ata_data_xfer(ap, qc->cdb, ap->cdb_len, 1); /* PIO commands are handled by polling */ - ap->pio_task_state = PIO_ST; + ap->hsm_task_state = HSM_ST; queue_work(ata_wq, &ap->pio_task); } diff --git a/include/linux/libata.h b/include/linux/libata.h index ceee1fc42c60..bb2d916bce44 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -156,15 +156,15 @@ enum { ATA_SHIFT_PIO = 11, }; -enum pio_task_states { - PIO_ST_UNKNOWN, - PIO_ST_IDLE, - PIO_ST_POLL, - PIO_ST_TMOUT, - PIO_ST, - PIO_ST_LAST, - PIO_ST_LAST_POLL, - PIO_ST_ERR, +enum hsm_task_states { + HSM_ST_UNKNOWN, + HSM_ST_IDLE, + HSM_ST_POLL, + HSM_ST_TMOUT, + HSM_ST, + HSM_ST_LAST, + HSM_ST_LAST_POLL, + HSM_ST_ERR, }; /* forward declarations */ @@ -319,7 +319,7 @@ struct ata_port { struct work_struct packet_task; struct work_struct pio_task; - unsigned int pio_task_state; + unsigned int hsm_task_state; unsigned long pio_task_timeout; void *private_data; From bfd00722ac230a39bc5234c5f7a514ea6a77996d Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 26 Sep 2005 11:28:47 +0900 Subject: [PATCH 14/59] [PATCH] libata EH document update Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- Documentation/DocBook/libata.tmpl | 356 ++++++++++++++++++++++++++++++ 1 file changed, 356 insertions(+) diff --git a/Documentation/DocBook/libata.tmpl b/Documentation/DocBook/libata.tmpl index 375ae760dc1e..fcbb58fc0fee 100644 --- a/Documentation/DocBook/libata.tmpl +++ b/Documentation/DocBook/libata.tmpl @@ -413,6 +413,362 @@ and other resources, etc. + + Error handling + + + This chapter describes how errors are handled under libata. + Readers are advised to read SCSI EH + (Documentation/scsi/scsi_eh.txt) and ATA exceptions doc first. + + + Origins of commands + + In libata, a command is represented with struct ata_queued_cmd + or qc. qc's are preallocated during port initialization and + repetitively used for command executions. Currently only one + qc is allocated per port but yet-to-be-merged NCQ branch + allocates one for each tag and maps each qc to NCQ tag 1-to-1. + + + libata commands can originate from two sources - libata itself + and SCSI midlayer. libata internal commands are used for + initialization and error handling. All normal blk requests + and commands for SCSI emulation are passed as SCSI commands + through queuecommand callback of SCSI host template. + + + + How commands are issued + + + + Internal commands + + + First, qc is allocated and initialized using + ata_qc_new_init(). Although ata_qc_new_init() doesn't + implement any wait or retry mechanism when qc is not + available, internal commands are currently issued only during + initialization and error recovery, so no other command is + active and allocation is guaranteed to succeed. + + + Once allocated qc's taskfile is initialized for the command to + be executed. qc currently has two mechanisms to notify + completion. One is via qc->complete_fn() callback and the + other is completion qc->waiting. qc->complete_fn() callback + is the asynchronous path used by normal SCSI translated + commands and qc->waiting is the synchronous (issuer sleeps in + process context) path used by internal commands. + + + Once initialization is complete, host_set lock is acquired + and the qc is issued. + + + + + SCSI commands + + + All libata drivers use ata_scsi_queuecmd() as + hostt->queuecommand callback. scmds can either be simulated + or translated. No qc is involved in processing a simulated + scmd. The result is computed right away and the scmd is + completed. + + + For a translated scmd, ata_qc_new_init() is invoked to + allocate a qc and the scmd is translated into the qc. SCSI + midlayer's completion notification function pointer is stored + into qc->scsidone. + + + qc->complete_fn() callback is used for completion + notification. ATA commands use ata_scsi_qc_complete() while + ATAPI commands use atapi_qc_complete(). Both functions end up + calling qc->scsidone to notify upper layer when the qc is + finished. After translation is completed, the qc is issued + with ata_qc_issue(). + + + Note that SCSI midlayer invokes hostt->queuecommand while + holding host_set lock, so all above occur while holding + host_set lock. + + + + + + + + How commands are processed + + Depending on which protocol and which controller are used, + commands are processed differently. For the purpose of + discussion, a controller which uses taskfile interface and all + standard callbacks is assumed. + + + Currently 6 ATA command protocols are used. They can be + sorted into the following four categories according to how + they are processed. + + + + ATA NO DATA or DMA + + + ATA_PROT_NODATA and ATA_PROT_DMA fall into this category. + These types of commands don't require any software + intervention once issued. Device will raise interrupt on + completion. + + + + + ATA PIO + + + ATA_PROT_PIO is in this category. libata currently + implements PIO with polling. ATA_NIEN bit is set to turn + off interrupt and pio_task on ata_wq performs polling and + IO. + + + + + ATAPI NODATA or DMA + + + ATA_PROT_ATAPI_NODATA and ATA_PROT_ATAPI_DMA are in this + category. packet_task is used to poll BSY bit after + issuing PACKET command. Once BSY is turned off by the + device, packet_task transfers CDB and hands off processing + to interrupt handler. + + + + + ATAPI PIO + + + ATA_PROT_ATAPI is in this category. ATA_NIEN bit is set + and, as in ATAPI NODATA or DMA, packet_task submits cdb. + However, after submitting cdb, further processing (data + transfer) is handed off to pio_task. + + + + + + + How commands are completed + + Once issued, all qc's are either completed with + ata_qc_complete() or time out. For commands which are handled + by interrupts, ata_host_intr() invokes ata_qc_complete(), and, + for PIO tasks, pio_task invokes ata_qc_complete(). In error + cases, packet_task may also complete commands. + + + ata_qc_complete() does the following. + + + + + + + DMA memory is unmapped. + + + + + + ATA_QCFLAG_ACTIVE is clared from qc->flags. + + + + + + qc->complete_fn() callback is invoked. If the return value of + the callback is not zero. Completion is short circuited and + ata_qc_complete() returns. + + + + + + __ata_qc_complete() is called, which does + + + + + qc->flags is cleared to zero. + + + + + + ap->active_tag and qc->tag are poisoned. + + + + + + qc->waiting is claread & completed (in that order). + + + + + + qc is deallocated by clearing appropriate bit in ap->qactive. + + + + + + + + + + + So, it basically notifies upper layer and deallocates qc. One + exception is short-circuit path in #3 which is used by + atapi_qc_complete(). + + + For all non-ATAPI commands, whether it fails or not, almost + the same code path is taken and very little error handling + takes place. A qc is completed with success status if it + succeeded, with failed status otherwise. + + + However, failed ATAPI commands require more handling as + REQUEST SENSE is needed to acquire sense data. If an ATAPI + command fails, ata_qc_complete() is invoked with error status, + which in turn invokes atapi_qc_complete() via + qc->complete_fn() callback. + + + This makes atapi_qc_complete() set scmd->result to + SAM_STAT_CHECK_CONDITION, complete the scmd and return 1. As + the sense data is empty but scmd->result is CHECK CONDITION, + SCSI midlayer will invoke EH for the scmd, and returning 1 + makes ata_qc_complete() to return without deallocating the qc. + This leads us to ata_scsi_error() with partially completed qc. + + + + + ata_scsi_error() + + ata_scsi_error() is the current hostt->eh_strategy_handler() + for libata. As discussed above, this will be entered in two + cases - timeout and ATAPI error completion. This function + calls low level libata driver's eng_timeout() callback, the + standard callback for which is ata_eng_timeout(). It checks + if a qc is active and calls ata_qc_timeout() on the qc if so. + Actual error handling occurs in ata_qc_timeout(). + + + If EH is invoked for timeout, ata_qc_timeout() stops BMDMA and + completes the qc. Note that as we're currently in EH, we + cannot call scsi_done. As described in SCSI EH doc, a + recovered scmd should be either retried with + scsi_queue_insert() or finished with scsi_finish_command(). + Here, we override qc->scsidone with scsi_finish_command() and + calls ata_qc_complete(). + + + If EH is invoked due to a failed ATAPI qc, the qc here is + completed but not deallocated. The purpose of this + half-completion is to use the qc as place holder to make EH + code reach this place. This is a bit hackish, but it works. + + + Once control reaches here, the qc is deallocated by invoking + __ata_qc_complete() explicitly. Then, internal qc for REQUEST + SENSE is issued. Once sense data is acquired, scmd is + finished by directly invoking scsi_finish_command() on the + scmd. Note that as we already have completed and deallocated + the qc which was associated with the scmd, we don't need + to/cannot call ata_qc_complete() again. + + + + + Problems with the current EH + + + + + + Error representation is too crude. Currently any and all + error conditions are represented with ATA STATUS and ERROR + registers. Errors which aren't ATA device errors are treated + as ATA device errors by setting ATA_ERR bit. Better error + descriptor which can properly represent ATA and other + errors/exceptions is needed. + + + + + + When handling timeouts, no action is taken to make device + forget about the timed out command and ready for new commands. + + + + + + EH handling via ata_scsi_error() is not properly protected + from usual command processing. On EH entrance, the device is + not in quiescent state. Timed out commands may succeed or + fail any time. pio_task and atapi_task may still be running. + + + + + + Too weak error recovery. Devices / controllers causing HSM + mismatch errors and other errors quite often require reset to + return to known state. Also, advanced error handling is + necessary to support features like NCQ and hotplug. + + + + + + ATA errors are directly handled in the interrupt handler and + PIO errors in pio_task. This is problematic for advanced + error handling for the following reasons. + + + First, advanced error handling often requires context and + internal qc execution. + + + Second, even a simple failure (say, CRC error) needs + information gathering and could trigger complex error handling + (say, resetting & reconfiguring). Having multiple code + paths to gather information, enter EH and trigger actions + makes life painful. + + + Third, scattered EH code makes implementing low level drivers + difficult. Low level drivers override libata callbacks. If + EH is scattered over several places, each affected callbacks + should perform its part of error handling. This can be error + prone and painful. + + + + + + + From a1213499b0ef75d8c627b461047805a235c9dd00 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Wed, 28 Sep 2005 13:26:47 -0400 Subject: [PATCH 15/59] libata: move EH docs to separate DocBook chapter --- Documentation/DocBook/libata.tmpl | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/Documentation/DocBook/libata.tmpl b/Documentation/DocBook/libata.tmpl index fcbb58fc0fee..b2ec780bcda1 100644 --- a/Documentation/DocBook/libata.tmpl +++ b/Documentation/DocBook/libata.tmpl @@ -413,7 +413,9 @@ and other resources, etc. - + + + Error handling @@ -422,7 +424,7 @@ and other resources, etc. (Documentation/scsi/scsi_eh.txt) and ATA exceptions doc first. - Origins of commands + Origins of commands In libata, a command is represented with struct ata_queued_cmd or qc. qc's are preallocated during port initialization and @@ -437,9 +439,9 @@ and other resources, etc. and commands for SCSI emulation are passed as SCSI commands through queuecommand callback of SCSI host template. - + - How commands are issued + How commands are issued @@ -501,9 +503,9 @@ and other resources, etc. - + - How commands are processed + How commands are processed Depending on which protocol and which controller are used, commands are processed differently. For the purpose of @@ -562,9 +564,9 @@ and other resources, etc. - + - How commands are completed + How commands are completed Once issued, all qc's are either completed with ata_qc_complete() or time out. For commands which are handled @@ -660,9 +662,9 @@ and other resources, etc. This leads us to ata_scsi_error() with partially completed qc. - + - ata_scsi_error() + ata_scsi_error() ata_scsi_error() is the current hostt->eh_strategy_handler() for libata. As discussed above, this will be entered in two @@ -697,9 +699,9 @@ and other resources, etc. to/cannot call ata_qc_complete() again. - + - Problems with the current EH + Problems with the current EH @@ -766,9 +768,7 @@ and other resources, etc. - - - + From b4b52db71529bbe46da914eda772fb574914c94d Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 26 Sep 2005 12:48:41 +0100 Subject: [PATCH 16/59] [PATCH] ata: re-order speeds sensibly. Signed-off-by: Jeff Garzik --- include/linux/ata.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/ata.h b/include/linux/ata.h index 85169ea9eb01..ecb7346d0c16 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -147,14 +147,14 @@ enum { XFER_MW_DMA_2 = 0x22, XFER_MW_DMA_1 = 0x21, XFER_MW_DMA_0 = 0x20, + XFER_SW_DMA_2 = 0x12, + XFER_SW_DMA_1 = 0x11, + XFER_SW_DMA_0 = 0x10, XFER_PIO_4 = 0x0C, XFER_PIO_3 = 0x0B, XFER_PIO_2 = 0x0A, XFER_PIO_1 = 0x09, XFER_PIO_0 = 0x08, - XFER_SW_DMA_2 = 0x12, - XFER_SW_DMA_1 = 0x11, - XFER_SW_DMA_0 = 0x10, XFER_PIO_SLOW = 0x00, /* ATAPI stuff */ From 644dd0cc494702ecd0698f467de113ace9593888 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Mon, 3 Oct 2005 15:55:19 -0400 Subject: [PATCH 17/59] [libata] improve device scan Replace SCSI's legacy "bang at the door" method of probing with one directly controlled by the underlying ATA transport layer. We now only call scsi_scan_target() for devices we find, rather than probing every possible channel/id within a certain range. --- drivers/scsi/libata-core.c | 2 +- drivers/scsi/libata-scsi.c | 12 ++++++++++++ drivers/scsi/libata.h | 1 + 3 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index e5b01997117a..902c76364af7 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -4113,7 +4113,7 @@ int ata_device_add(struct ata_probe_ent *ent) for (i = 0; i < count; i++) { struct ata_port *ap = host_set->ports[i]; - scsi_scan_host(ap->host); + ata_scsi_scan_host(ap); } dev_set_drvdata(dev, host_set); diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 104fd9a63e73..4fc0134d4272 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -1678,3 +1678,15 @@ void ata_scsi_simulate(u16 *id, } } +void ata_scsi_scan_host(struct ata_port *ap) +{ + unsigned int i; + + if (ap->flags & ATA_FLAG_PORT_DISABLED) + return; + + for (i = 0; i < ATA_MAX_DEVICES; i++) + if (ata_dev_present(&ap->device[i])) + scsi_scan_target(&ap->host->shost_gendev, 0, i, ~0, 0); +} + diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h index d608b3a0f6fe..c7a1fa1c9abc 100644 --- a/drivers/scsi/libata.h +++ b/drivers/scsi/libata.h @@ -51,6 +51,7 @@ extern void swap_buf_le16(u16 *buf, unsigned int buf_words); /* libata-scsi.c */ +extern void ata_scsi_scan_host(struct ata_port *ap); extern void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat); extern int ata_scsi_error(struct Scsi_Host *host); extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf, From 3f19ee8cb3a1003cb5183696bc55934f5865f868 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Mon, 3 Oct 2005 21:36:41 -0400 Subject: [PATCH 18/59] [libata] improve device scan even more Since our max_lun is unconditionally set to 1, we might as well hardcode a LUN 0 probe, rather than a wildcard LUN scan. The ide-scsi driver sets max_lun to a value greater than under certain conditions: if ((drive->id->last_lun & 0x7) != 7) host->max_lun = (drive->id->last_lun & 0x7) + 1; else host->max_lun = 1; last_lun is Word 126 of IDENTIFY PACKET DEVICE, marked as obsolete and undocumented in non-ancient specs. We'll leave it out for now. Should the need arise to support multi-LUN ATAPI devices, we'll probably want to add the above code. Finally, there have been reports of REPORT LUNS commands locking up ATAPI drives. Eliminating the wildcard LUN scan could help reduce the trouble from problematic drives. --- drivers/scsi/libata-scsi.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 4fc0134d4272..8295a656e521 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -1680,13 +1680,17 @@ void ata_scsi_simulate(u16 *id, void ata_scsi_scan_host(struct ata_port *ap) { + struct ata_device *dev; unsigned int i; if (ap->flags & ATA_FLAG_PORT_DISABLED) return; - for (i = 0; i < ATA_MAX_DEVICES; i++) - if (ata_dev_present(&ap->device[i])) - scsi_scan_target(&ap->host->shost_gendev, 0, i, ~0, 0); + for (i = 0; i < ATA_MAX_DEVICES; i++) { + dev = &ap->device[i]; + + if (ata_dev_present(dev)) + scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); + } } From 31961943e3110c5a1c36b1e0069c29f7c4380e51 Mon Sep 17 00:00:00 2001 From: Brett Russ Date: Fri, 30 Sep 2005 01:36:00 -0400 Subject: [PATCH 19/59] [PATCH] libata: Marvell SATA support (DMA mode) (resend: v0.22) This is my libata compatible low level driver for the Marvell SATA family. Currently it runs in DMA mode on a 6081 chip. The 5xxx series parts are not yet DMA capable in this driver because the registers have differences that haven't been accounted for yet. Basically, I'm focused on the 6xxx series right now. I apologize for those seeing problems on the 5xxx series, I've not had a chance to look at those problems yet. For those curious, the previous bug causing the SCSI timeout and subsequent panics was caused by an improper clear of hc_irq_cause in mv_host_intr(). This version is running well in my environment (6081 chips, with/without SW raid1) and is showing equal or better performance compared to the Marvell driver (mv_sata) in my initial tests (timed dd's of reads/writes to/from memory/disk). I still need to look at the causes of occasional problems such as this: ata11: translating stat 0x35 err 0x00 to sense ata11: status=0x35 { DeviceFault SeekComplete CorrectedError Error } SCSI error : <10 0 0 0> return code = 0x8000002 Current sda: sense key Hardware Error end_request: I/O error, dev sda, sector 3155010 and this, seen at init time: ATA: abnormal status 0x80 on port 0xE093911C but they aren't showstoppers. Signed-off-by: Brett Russ Signed-off-by: Jeff Garzik --- drivers/scsi/sata_mv.c | 946 ++++++++++++++++++++++++++++++++--------- 1 file changed, 753 insertions(+), 193 deletions(-) diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index ea76fe44585e..ecda7df21142 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -35,7 +35,7 @@ #include #define DRV_NAME "sata_mv" -#define DRV_VERSION "0.12" +#define DRV_VERSION "0.22" enum { /* BAR's are enumerated in terms of pci_resource_start() terms */ @@ -55,31 +55,61 @@ enum { MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */ MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ, - MV_Q_CT = 32, - MV_CRQB_SZ = 32, - MV_CRPB_SZ = 8, + MV_USE_Q_DEPTH = ATA_DEF_QUEUE, - MV_DMA_BOUNDARY = 0xffffffffU, - SATAHC_MASK = (~(MV_SATAHC_REG_SZ - 1)), + MV_MAX_Q_DEPTH = 32, + MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1, + + /* CRQB needs alignment on a 1KB boundary. Size == 1KB + * CRPB needs alignment on a 256B boundary. Size == 256B + * SG count of 176 leads to MV_PORT_PRIV_DMA_SZ == 4KB + * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B + */ + MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH), + MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH), + MV_MAX_SG_CT = 176, + MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT), + MV_PORT_PRIV_DMA_SZ = (MV_CRQB_Q_SZ + MV_CRPB_Q_SZ + MV_SG_TBL_SZ), + + /* Our DMA boundary is determined by an ePRD being unable to handle + * anything larger than 64KB + */ + MV_DMA_BOUNDARY = 0xffffU, MV_PORTS_PER_HC = 4, /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */ MV_PORT_HC_SHIFT = 2, - /* == (port % MV_PORTS_PER_HC) to determine port from 0-7 port */ + /* == (port % MV_PORTS_PER_HC) to determine hard port from 0-7 port */ MV_PORT_MASK = 3, /* Host Flags */ MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */ MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */ - MV_FLAG_BDMA = (1 << 28), /* Basic DMA */ + MV_FLAG_GLBL_SFT_RST = (1 << 28), /* Global Soft Reset support */ + MV_COMMON_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | + ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO), + MV_6XXX_FLAGS = (MV_FLAG_IRQ_COALESCE | + MV_FLAG_GLBL_SFT_RST), chip_504x = 0, chip_508x = 1, chip_604x = 2, chip_608x = 3, + CRQB_FLAG_READ = (1 << 0), + CRQB_TAG_SHIFT = 1, + CRQB_CMD_ADDR_SHIFT = 8, + CRQB_CMD_CS = (0x2 << 11), + CRQB_CMD_LAST = (1 << 15), + + CRPB_FLAG_STATUS_SHIFT = 8, + + EPRD_FLAG_END_OF_TBL = (1 << 31), + /* PCI interface registers */ + PCI_COMMAND_OFS = 0xc00, + PCI_MAIN_CMD_STS_OFS = 0xd30, STOP_PCI_MASTER = (1 << 2), PCI_MASTER_EMPTY = (1 << 3), @@ -111,20 +141,13 @@ enum { HC_CFG_OFS = 0, HC_IRQ_CAUSE_OFS = 0x14, - CRBP_DMA_DONE = (1 << 0), /* shift by port # */ + CRPB_DMA_DONE = (1 << 0), /* shift by port # */ HC_IRQ_COAL = (1 << 4), /* IRQ coalescing */ DEV_IRQ = (1 << 8), /* shift by port # */ /* Shadow block registers */ - SHD_PIO_DATA_OFS = 0x100, - SHD_FEA_ERR_OFS = 0x104, - SHD_SECT_CNT_OFS = 0x108, - SHD_LBA_L_OFS = 0x10C, - SHD_LBA_M_OFS = 0x110, - SHD_LBA_H_OFS = 0x114, - SHD_DEV_HD_OFS = 0x118, - SHD_CMD_STA_OFS = 0x11C, - SHD_CTL_AST_OFS = 0x120, + SHD_BLK_OFS = 0x100, + SHD_CTL_AST_OFS = 0x20, /* ofs from SHD_BLK_OFS */ /* SATA registers */ SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */ @@ -132,6 +155,11 @@ enum { /* Port registers */ EDMA_CFG_OFS = 0, + EDMA_CFG_Q_DEPTH = 0, /* queueing disabled */ + EDMA_CFG_NCQ = (1 << 5), + EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */ + EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */ + EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */ EDMA_ERR_IRQ_CAUSE_OFS = 0x8, EDMA_ERR_IRQ_MASK_OFS = 0xc, @@ -161,33 +189,85 @@ enum { EDMA_ERR_LNK_DATA_TX | EDMA_ERR_TRANS_PROTO), + EDMA_REQ_Q_BASE_HI_OFS = 0x10, + EDMA_REQ_Q_IN_PTR_OFS = 0x14, /* also contains BASE_LO */ + EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U, + + EDMA_REQ_Q_OUT_PTR_OFS = 0x18, + EDMA_REQ_Q_PTR_SHIFT = 5, + + EDMA_RSP_Q_BASE_HI_OFS = 0x1c, + EDMA_RSP_Q_IN_PTR_OFS = 0x20, + EDMA_RSP_Q_OUT_PTR_OFS = 0x24, /* also contains BASE_LO */ + EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U, + EDMA_RSP_Q_PTR_SHIFT = 3, + EDMA_CMD_OFS = 0x28, EDMA_EN = (1 << 0), EDMA_DS = (1 << 1), ATA_RST = (1 << 2), - /* BDMA is 6xxx part only */ - BDMA_CMD_OFS = 0x224, - BDMA_START = (1 << 0), + /* Host private flags (hp_flags) */ + MV_HP_FLAG_MSI = (1 << 0), - MV_UNDEF = 0, + /* Port private flags (pp_flags) */ + MV_PP_FLAG_EDMA_EN = (1 << 0), + MV_PP_FLAG_EDMA_DS_ACT = (1 << 1), +}; + +/* Command ReQuest Block: 32B */ +struct mv_crqb { + u32 sg_addr; + u32 sg_addr_hi; + u16 ctrl_flags; + u16 ata_cmd[11]; +}; + +/* Command ResPonse Block: 8B */ +struct mv_crpb { + u16 id; + u16 flags; + u32 tmstmp; +}; + +/* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */ +struct mv_sg { + u32 addr; + u32 flags_size; + u32 addr_hi; + u32 reserved; }; struct mv_port_priv { + struct mv_crqb *crqb; + dma_addr_t crqb_dma; + struct mv_crpb *crpb; + dma_addr_t crpb_dma; + struct mv_sg *sg_tbl; + dma_addr_t sg_tbl_dma; + unsigned req_producer; /* cp of req_in_ptr */ + unsigned rsp_consumer; /* cp of rsp_out_ptr */ + u32 pp_flags; }; struct mv_host_priv { - + u32 hp_flags; }; static void mv_irq_clear(struct ata_port *ap); static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in); static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val); +static u8 mv_check_err(struct ata_port *ap); static void mv_phy_reset(struct ata_port *ap); -static int mv_master_reset(void __iomem *mmio_base); +static void mv_host_stop(struct ata_host_set *host_set); +static int mv_port_start(struct ata_port *ap); +static void mv_port_stop(struct ata_port *ap); +static void mv_qc_prep(struct ata_queued_cmd *qc); +static int mv_qc_issue(struct ata_queued_cmd *qc); static irqreturn_t mv_interrupt(int irq, void *dev_instance, struct pt_regs *regs); +static void mv_eng_timeout(struct ata_port *ap); static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static Scsi_Host_Template mv_sht = { @@ -196,13 +276,13 @@ static Scsi_Host_Template mv_sht = { .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .eh_strategy_handler = ata_scsi_error, - .can_queue = ATA_DEF_QUEUE, + .can_queue = MV_USE_Q_DEPTH, .this_id = ATA_SHT_THIS_ID, - .sg_tablesize = MV_UNDEF, + .sg_tablesize = MV_MAX_SG_CT, .max_sectors = ATA_MAX_SECTORS, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, - .use_clustering = MV_UNDEF, + .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = MV_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, @@ -216,15 +296,16 @@ static struct ata_port_operations mv_ops = { .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, + .check_err = mv_check_err, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .phy_reset = mv_phy_reset, - .qc_prep = ata_qc_prep, - .qc_issue = ata_qc_issue_prot, + .qc_prep = mv_qc_prep, + .qc_issue = mv_qc_issue, - .eng_timeout = ata_eng_timeout, + .eng_timeout = mv_eng_timeout, .irq_handler = mv_interrupt, .irq_clear = mv_irq_clear, @@ -232,46 +313,39 @@ static struct ata_port_operations mv_ops = { .scr_read = mv_scr_read, .scr_write = mv_scr_write, - .port_start = ata_port_start, - .port_stop = ata_port_stop, - .host_stop = ata_host_stop, + .port_start = mv_port_start, + .port_stop = mv_port_stop, + .host_stop = mv_host_stop, }; static struct ata_port_info mv_port_info[] = { { /* chip_504x */ .sht = &mv_sht, - .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO), - .pio_mask = 0x1f, /* pio4-0 */ - .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */ + .host_flags = MV_COMMON_FLAGS, + .pio_mask = 0x1f, /* pio0-4 */ + .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */ .port_ops = &mv_ops, }, { /* chip_508x */ .sht = &mv_sht, - .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | - MV_FLAG_DUAL_HC), - .pio_mask = 0x1f, /* pio4-0 */ - .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */ + .host_flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC), + .pio_mask = 0x1f, /* pio0-4 */ + .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */ .port_ops = &mv_ops, }, { /* chip_604x */ .sht = &mv_sht, - .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | - MV_FLAG_IRQ_COALESCE | MV_FLAG_BDMA), - .pio_mask = 0x1f, /* pio4-0 */ - .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */ + .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS), + .pio_mask = 0x1f, /* pio0-4 */ + .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &mv_ops, }, { /* chip_608x */ .sht = &mv_sht, - .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | - ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | - MV_FLAG_IRQ_COALESCE | MV_FLAG_DUAL_HC | - MV_FLAG_BDMA), - .pio_mask = 0x1f, /* pio4-0 */ - .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */ + .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS | + MV_FLAG_DUAL_HC), + .pio_mask = 0x1f, /* pio0-4 */ + .udma_mask = 0x7f, /* udma0-6 */ .port_ops = &mv_ops, }, }; @@ -306,12 +380,6 @@ static inline void writelfl(unsigned long data, void __iomem *addr) (void) readl(addr); /* flush to avoid PCI posted write */ } -static inline void __iomem *mv_port_addr_to_hc_base(void __iomem *port_mmio) -{ - return ((void __iomem *)((unsigned long)port_mmio & - (unsigned long)SATAHC_MASK)); -} - static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc) { return (base + MV_SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ)); @@ -329,26 +397,143 @@ static inline void __iomem *mv_ap_base(struct ata_port *ap) return mv_port_base(ap->host_set->mmio_base, ap->port_no); } -static inline int mv_get_hc_count(unsigned long flags) +static inline int mv_get_hc_count(unsigned long hp_flags) { - return ((flags & MV_FLAG_DUAL_HC) ? 2 : 1); -} - -static inline int mv_is_edma_active(struct ata_port *ap) -{ - void __iomem *port_mmio = mv_ap_base(ap); - return (EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)); -} - -static inline int mv_port_bdma_capable(struct ata_port *ap) -{ - return (ap->flags & MV_FLAG_BDMA); + return ((hp_flags & MV_FLAG_DUAL_HC) ? 2 : 1); } static void mv_irq_clear(struct ata_port *ap) { } +static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp, + struct ata_port *ap) +{ + unsigned long flags; + + spin_lock_irqsave(&ap->host_set->lock, flags); + + writelfl(EDMA_EN, base + EDMA_CMD_OFS); + pp->pp_flags |= MV_PP_FLAG_EDMA_EN; + + spin_unlock_irqrestore(&ap->host_set->lock, flags); +} + +static void mv_stop_dma(struct ata_port *ap) +{ + void __iomem *port_mmio = mv_ap_base(ap); + struct mv_port_priv *pp = ap->private_data; + unsigned long flags; + u32 reg; + int i; + + spin_lock_irqsave(&ap->host_set->lock, flags); + + if (!(MV_PP_FLAG_EDMA_DS_ACT & pp->pp_flags) && + ((MV_PP_FLAG_EDMA_EN & pp->pp_flags) || + (EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)))) { + /* Disable EDMA if we're not already trying to disable it + * and it is currently active. The disable bit auto clears. + */ + pp->pp_flags |= MV_PP_FLAG_EDMA_DS_ACT; + writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS); + pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; + } + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + /* now properly wait for the eDMA to stop */ + for (i = 1000; i > 0; i--) { + reg = readl(port_mmio + EDMA_CMD_OFS); + if (!(EDMA_EN & reg)) { + break; + } + udelay(100); + } + + spin_lock_irqsave(&ap->host_set->lock, flags); + pp->pp_flags &= ~MV_PP_FLAG_EDMA_DS_ACT; + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + if (EDMA_EN & reg) { + printk(KERN_ERR "ata%u: Unable to stop eDMA\n", ap->id); + } +} + +static void mv_dump_mem(void __iomem *start, unsigned bytes) +{ +#ifdef ATA_DEBUG + int b, w; + for (b = 0; b < bytes; ) { + DPRINTK("%p: ", start + b); + for (w = 0; b < bytes && w < 4; w++) { + printk("%08x ",readl(start + b)); + b += sizeof(u32); + } + printk("\n"); + } +#endif +} +static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes) +{ +#ifdef ATA_DEBUG + int b, w; + u32 dw; + for (b = 0; b < bytes; ) { + DPRINTK("%02x: ", b); + for (w = 0; b < bytes && w < 4; w++) { + (void) pci_read_config_dword(pdev,b,&dw); + printk("%08x ",dw); + b += sizeof(u32); + } + printk("\n"); + } +#endif +} +static void mv_dump_all_regs(void __iomem *mmio_base, int port, + struct pci_dev *pdev) +{ +#ifdef ATA_DEBUG + void __iomem *hc_base = mv_hc_base(mmio_base, + port >> MV_PORT_HC_SHIFT); + void __iomem *port_base; + int start_port, num_ports, p, start_hc, num_hcs, hc; + + if (0 > port) { + start_hc = start_port = 0; + num_ports = 8; /* shld be benign for 4 port devs */ + num_hcs = 2; + } else { + start_hc = port >> MV_PORT_HC_SHIFT; + start_port = port; + num_ports = num_hcs = 1; + } + DPRINTK("All registers for port(s) %u-%u:\n", start_port, + num_ports > 1 ? num_ports - 1 : start_port); + + if (NULL != pdev) { + DPRINTK("PCI config space regs:\n"); + mv_dump_pci_cfg(pdev, 0x68); + } + DPRINTK("PCI regs:\n"); + mv_dump_mem(mmio_base+0xc00, 0x3c); + mv_dump_mem(mmio_base+0xd00, 0x34); + mv_dump_mem(mmio_base+0xf00, 0x4); + mv_dump_mem(mmio_base+0x1d00, 0x6c); + for (hc = start_hc; hc < start_hc + num_hcs; hc++) { + hc_base = mv_hc_base(mmio_base, port >> MV_PORT_HC_SHIFT); + DPRINTK("HC regs (HC %i):\n", hc); + mv_dump_mem(hc_base, 0x1c); + } + for (p = start_port; p < start_port + num_ports; p++) { + port_base = mv_port_base(mmio_base, p); + DPRINTK("EDMA regs (port %i):\n",p); + mv_dump_mem(port_base, 0x54); + DPRINTK("SATA regs (port %i):\n",p); + mv_dump_mem(port_base+0x300, 0x60); + } +#endif +} + static unsigned int mv_scr_offset(unsigned int sc_reg_in) { unsigned int ofs; @@ -389,30 +574,29 @@ static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val) } } -static int mv_master_reset(void __iomem *mmio_base) +/* This routine only applies to 6xxx parts */ +static int mv_global_soft_reset(void __iomem *mmio_base) { void __iomem *reg = mmio_base + PCI_MAIN_CMD_STS_OFS; int i, rc = 0; u32 t; - VPRINTK("ENTER\n"); - /* Following procedure defined in PCI "main command and status * register" table. */ t = readl(reg); writel(t | STOP_PCI_MASTER, reg); - for (i = 0; i < 100; i++) { - msleep(10); + for (i = 0; i < 1000; i++) { + udelay(1); t = readl(reg); if (PCI_MASTER_EMPTY & t) { break; } } if (!(PCI_MASTER_EMPTY & t)) { - printk(KERN_ERR DRV_NAME "PCI master won't flush\n"); - rc = 1; /* broken HW? */ + printk(KERN_ERR DRV_NAME ": PCI master won't flush\n"); + rc = 1; goto done; } @@ -425,40 +609,312 @@ static int mv_master_reset(void __iomem *mmio_base) } while (!(GLOB_SFT_RST & t) && (i-- > 0)); if (!(GLOB_SFT_RST & t)) { - printk(KERN_ERR DRV_NAME "can't set global reset\n"); - rc = 1; /* broken HW? */ + printk(KERN_ERR DRV_NAME ": can't set global reset\n"); + rc = 1; goto done; } - /* clear reset */ + /* clear reset and *reenable the PCI master* (not mentioned in spec) */ i = 5; do { - writel(t & ~GLOB_SFT_RST, reg); + writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg); t = readl(reg); udelay(1); } while ((GLOB_SFT_RST & t) && (i-- > 0)); if (GLOB_SFT_RST & t) { - printk(KERN_ERR DRV_NAME "can't clear global reset\n"); - rc = 1; /* broken HW? */ + printk(KERN_ERR DRV_NAME ": can't clear global reset\n"); + rc = 1; + } +done: + return rc; +} + +static void mv_host_stop(struct ata_host_set *host_set) +{ + struct mv_host_priv *hpriv = host_set->private_data; + struct pci_dev *pdev = to_pci_dev(host_set->dev); + + if (hpriv->hp_flags & MV_HP_FLAG_MSI) { + pci_disable_msi(pdev); + } else { + pci_intx(pdev, 0); + } + kfree(hpriv); + ata_host_stop(host_set); +} + +static int mv_port_start(struct ata_port *ap) +{ + struct device *dev = ap->host_set->dev; + struct mv_port_priv *pp; + void __iomem *port_mmio = mv_ap_base(ap); + void *mem; + dma_addr_t mem_dma; + + pp = kmalloc(sizeof(*pp), GFP_KERNEL); + if (!pp) { + return -ENOMEM; + } + memset(pp, 0, sizeof(*pp)); + + mem = dma_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma, + GFP_KERNEL); + if (!mem) { + kfree(pp); + return -ENOMEM; + } + memset(mem, 0, MV_PORT_PRIV_DMA_SZ); + + /* First item in chunk of DMA memory: + * 32-slot command request table (CRQB), 32 bytes each in size + */ + pp->crqb = mem; + pp->crqb_dma = mem_dma; + mem += MV_CRQB_Q_SZ; + mem_dma += MV_CRQB_Q_SZ; + + /* Second item: + * 32-slot command response table (CRPB), 8 bytes each in size + */ + pp->crpb = mem; + pp->crpb_dma = mem_dma; + mem += MV_CRPB_Q_SZ; + mem_dma += MV_CRPB_Q_SZ; + + /* Third item: + * Table of scatter-gather descriptors (ePRD), 16 bytes each + */ + pp->sg_tbl = mem; + pp->sg_tbl_dma = mem_dma; + + writelfl(EDMA_CFG_Q_DEPTH | EDMA_CFG_RD_BRST_EXT | + EDMA_CFG_WR_BUFF_LEN, port_mmio + EDMA_CFG_OFS); + + writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS); + writelfl(pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK, + port_mmio + EDMA_REQ_Q_IN_PTR_OFS); + + writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS); + writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS); + + writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS); + writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK, + port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); + + pp->req_producer = pp->rsp_consumer = 0; + + /* Don't turn on EDMA here...do it before DMA commands only. Else + * we'll be unable to send non-data, PIO, etc due to restricted access + * to shadow regs. + */ + ap->private_data = pp; + return 0; +} + +static void mv_port_stop(struct ata_port *ap) +{ + struct device *dev = ap->host_set->dev; + struct mv_port_priv *pp = ap->private_data; + + mv_stop_dma(ap); + + ap->private_data = NULL; + dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma); + kfree(pp); +} + +static void mv_fill_sg(struct ata_queued_cmd *qc) +{ + struct mv_port_priv *pp = qc->ap->private_data; + unsigned int i; + + for (i = 0; i < qc->n_elem; i++) { + u32 sg_len; + dma_addr_t addr; + + addr = sg_dma_address(&qc->sg[i]); + sg_len = sg_dma_len(&qc->sg[i]); + + pp->sg_tbl[i].addr = cpu_to_le32(addr & 0xffffffff); + pp->sg_tbl[i].addr_hi = cpu_to_le32((addr >> 16) >> 16); + assert(0 == (sg_len & ~MV_DMA_BOUNDARY)); + pp->sg_tbl[i].flags_size = cpu_to_le32(sg_len); + } + if (0 < qc->n_elem) { + pp->sg_tbl[qc->n_elem - 1].flags_size |= EPRD_FLAG_END_OF_TBL; + } +} + +static inline unsigned mv_inc_q_index(unsigned *index) +{ + *index = (*index + 1) & MV_MAX_Q_DEPTH_MASK; + return *index; +} + +static inline void mv_crqb_pack_cmd(u16 *cmdw, u8 data, u8 addr, unsigned last) +{ + *cmdw = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS | + (last ? CRQB_CMD_LAST : 0); +} + +static void mv_qc_prep(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + struct mv_port_priv *pp = ap->private_data; + u16 *cw; + struct ata_taskfile *tf; + u16 flags = 0; + + if (ATA_PROT_DMA != qc->tf.protocol) { + return; } - done: - VPRINTK("EXIT, rc = %i\n", rc); - return rc; + /* the req producer index should be the same as we remember it */ + assert(((readl(mv_ap_base(qc->ap) + EDMA_REQ_Q_IN_PTR_OFS) >> + EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == + pp->req_producer); + + /* Fill in command request block + */ + if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { + flags |= CRQB_FLAG_READ; + } + assert(MV_MAX_Q_DEPTH > qc->tag); + flags |= qc->tag << CRQB_TAG_SHIFT; + + pp->crqb[pp->req_producer].sg_addr = + cpu_to_le32(pp->sg_tbl_dma & 0xffffffff); + pp->crqb[pp->req_producer].sg_addr_hi = + cpu_to_le32((pp->sg_tbl_dma >> 16) >> 16); + pp->crqb[pp->req_producer].ctrl_flags = cpu_to_le16(flags); + + cw = &pp->crqb[pp->req_producer].ata_cmd[0]; + tf = &qc->tf; + + /* Sadly, the CRQB cannot accomodate all registers--there are + * only 11 bytes...so we must pick and choose required + * registers based on the command. So, we drop feature and + * hob_feature for [RW] DMA commands, but they are needed for + * NCQ. NCQ will drop hob_nsect. + */ + switch (tf->command) { + case ATA_CMD_READ: + case ATA_CMD_READ_EXT: + case ATA_CMD_WRITE: + case ATA_CMD_WRITE_EXT: + mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0); + break; +#ifdef LIBATA_NCQ /* FIXME: remove this line when NCQ added */ + case ATA_CMD_FPDMA_READ: + case ATA_CMD_FPDMA_WRITE: + mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0); + mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0); + break; +#endif /* FIXME: remove this line when NCQ added */ + default: + /* The only other commands EDMA supports in non-queued and + * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none + * of which are defined/used by Linux. If we get here, this + * driver needs work. + * + * FIXME: modify libata to give qc_prep a return value and + * return error here. + */ + BUG_ON(tf->command); + break; + } + mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0); + mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0); + mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0); + mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0); + mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0); + mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0); + mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0); + mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0); + mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */ + + if (!(qc->flags & ATA_QCFLAG_DMAMAP)) { + return; + } + mv_fill_sg(qc); +} + +static int mv_qc_issue(struct ata_queued_cmd *qc) +{ + void __iomem *port_mmio = mv_ap_base(qc->ap); + struct mv_port_priv *pp = qc->ap->private_data; + u32 in_ptr; + + if (ATA_PROT_DMA != qc->tf.protocol) { + /* We're about to send a non-EDMA capable command to the + * port. Turn off EDMA so there won't be problems accessing + * shadow block, etc registers. + */ + mv_stop_dma(qc->ap); + return ata_qc_issue_prot(qc); + } + + in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS); + + /* the req producer index should be the same as we remember it */ + assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == + pp->req_producer); + /* until we do queuing, the queue should be empty at this point */ + assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == + ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) >> + EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK)); + + mv_inc_q_index(&pp->req_producer); /* now incr producer index */ + + if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) { + /* turn on EDMA if not already on */ + mv_start_dma(port_mmio, pp, qc->ap); + } + assert(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)); + + /* and write the request in pointer to kick the EDMA to life */ + in_ptr &= EDMA_REQ_Q_BASE_LO_MASK; + in_ptr |= pp->req_producer << EDMA_REQ_Q_PTR_SHIFT; + writelfl(in_ptr, port_mmio + EDMA_REQ_Q_IN_PTR_OFS); + + return 0; +} + +static u8 mv_get_crpb_status(struct ata_port *ap) +{ + void __iomem *port_mmio = mv_ap_base(ap); + struct mv_port_priv *pp = ap->private_data; + u32 out_ptr; + + out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); + + /* the response consumer index should be the same as we remember it */ + assert(((out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == + pp->rsp_consumer); + + /* increment our consumer index... */ + pp->rsp_consumer = mv_inc_q_index(&pp->rsp_consumer); + + /* and, until we do NCQ, there should only be 1 CRPB waiting */ + assert(((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) >> + EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) == + pp->rsp_consumer); + + /* write out our inc'd consumer index so EDMA knows we're caught up */ + out_ptr &= EDMA_RSP_Q_BASE_LO_MASK; + out_ptr |= pp->rsp_consumer << EDMA_RSP_Q_PTR_SHIFT; + writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS); + + /* Return ATA status register for completed CRPB */ + return (pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT); } static void mv_err_intr(struct ata_port *ap) { - void __iomem *port_mmio; + void __iomem *port_mmio = mv_ap_base(ap); u32 edma_err_cause, serr = 0; - /* bug here b/c we got an err int on a port we don't know about, - * so there's no way to clear it - */ - BUG_ON(NULL == ap); - port_mmio = mv_ap_base(ap); - edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); if (EDMA_ERR_SERR & edma_err_cause) { @@ -477,8 +933,7 @@ static void mv_err_intr(struct ata_port *ap) } } -/* Handle any outstanding interrupts in a single SATAHC - */ +/* Handle any outstanding interrupts in a single SATAHC */ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, unsigned int hc) { @@ -487,8 +942,8 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, struct ata_port *ap; struct ata_queued_cmd *qc; u32 hc_irq_cause; - int shift, port, port0, hard_port; - u8 ata_status; + int shift, port, port0, hard_port, handled; + u8 ata_status = 0; if (hc == 0) { port0 = 0; @@ -499,7 +954,7 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, /* we'll need the HC success int register in most cases */ hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS); if (hc_irq_cause) { - writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS); + writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS); } VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n", @@ -508,35 +963,38 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) { ap = host_set->ports[port]; hard_port = port & MV_PORT_MASK; /* range 0-3 */ - ata_status = 0xffU; + handled = 0; /* ensure ata_status is set if handled++ */ - if (((CRBP_DMA_DONE | DEV_IRQ) << hard_port) & hc_irq_cause) { - BUG_ON(NULL == ap); - /* rcv'd new resp, basic DMA complete, or ATA IRQ */ - /* This is needed to clear the ATA INTRQ. - * FIXME: don't read the status reg in EDMA mode! + if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) { + /* new CRPB on the queue; just one at a time until NCQ + */ + ata_status = mv_get_crpb_status(ap); + handled++; + } else if ((DEV_IRQ << hard_port) & hc_irq_cause) { + /* received ATA IRQ; read the status reg to clear INTRQ */ ata_status = readb((void __iomem *) ap->ioaddr.status_addr); + handled++; } - shift = port * 2; + shift = port << 1; /* (port * 2) */ if (port >= MV_PORTS_PER_HC) { shift++; /* skip bit 8 in the HC Main IRQ reg */ } if ((PORT0_ERR << shift) & relevant) { mv_err_intr(ap); - /* FIXME: smart to OR in ATA_ERR? */ + /* OR in ATA_ERR to ensure libata knows we took one */ ata_status = readb((void __iomem *) ap->ioaddr.status_addr) | ATA_ERR; + handled++; } - if (ap) { + if (handled && ap) { qc = ata_qc_from_tag(ap, ap->active_tag); if (NULL != qc) { VPRINTK("port %u IRQ found for qc, " "ata_status 0x%x\n", port,ata_status); - BUG_ON(0xffU == ata_status); /* mark qc status appropriately */ ata_qc_complete(qc, ata_status); } @@ -550,12 +1008,10 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance, { struct ata_host_set *host_set = dev_instance; unsigned int hc, handled = 0, n_hcs; - void __iomem *mmio; + void __iomem *mmio = host_set->mmio_base; u32 irq_stat; - mmio = host_set->mmio_base; irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS); - n_hcs = mv_get_hc_count(host_set->ports[0]->flags); /* check the cases where we either have nothing pending or have read * a bogus register value which can indicate HW removal or PCI fault @@ -564,64 +1020,87 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance, return IRQ_NONE; } + n_hcs = mv_get_hc_count(host_set->ports[0]->flags); spin_lock(&host_set->lock); for (hc = 0; hc < n_hcs; hc++) { u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT)); if (relevant) { mv_host_intr(host_set, relevant, hc); - handled = 1; + handled++; } } if (PCI_ERR & irq_stat) { - /* FIXME: these are all masked by default, but still need - * to recover from them properly. - */ - } + printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n", + readl(mmio + PCI_IRQ_CAUSE_OFS)); + VPRINTK("All regs @ PCI error\n"); + mv_dump_all_regs(mmio, -1, to_pci_dev(host_set->dev)); + + writelfl(0, mmio + PCI_IRQ_CAUSE_OFS); + handled++; + } spin_unlock(&host_set->lock); return IRQ_RETVAL(handled); } +static u8 mv_check_err(struct ata_port *ap) +{ + mv_stop_dma(ap); /* can't read shadow regs if DMA on */ + return readb((void __iomem *) ap->ioaddr.error_addr); +} + +/* Part of this is taken from __sata_phy_reset and modified to not sleep + * since this routine gets called from interrupt level. + */ static void mv_phy_reset(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); struct ata_taskfile tf; struct ata_device *dev = &ap->device[0]; - u32 edma = 0, bdma; + unsigned long timeout; VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio); - edma = readl(port_mmio + EDMA_CMD_OFS); - if (EDMA_EN & edma) { - /* disable EDMA if active */ - edma &= ~EDMA_EN; - writelfl(edma | EDMA_DS, port_mmio + EDMA_CMD_OFS); - udelay(1); - } else if (mv_port_bdma_capable(ap) && - (bdma = readl(port_mmio + BDMA_CMD_OFS)) & BDMA_START) { - /* disable BDMA if active */ - writelfl(bdma & ~BDMA_START, port_mmio + BDMA_CMD_OFS); - } + mv_stop_dma(ap); - writelfl(edma | ATA_RST, port_mmio + EDMA_CMD_OFS); + writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS); udelay(25); /* allow reset propagation */ /* Spec never mentions clearing the bit. Marvell's driver does * clear the bit, however. */ - writelfl(edma & ~ATA_RST, port_mmio + EDMA_CMD_OFS); + writelfl(0, port_mmio + EDMA_CMD_OFS); - VPRINTK("Done. Now calling __sata_phy_reset()\n"); + VPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x " + "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS), + mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL)); /* proceed to init communications via the scr_control reg */ - __sata_phy_reset(ap); + scr_write_flush(ap, SCR_CONTROL, 0x301); + mdelay(1); + scr_write_flush(ap, SCR_CONTROL, 0x300); + timeout = jiffies + (HZ * 1); + do { + mdelay(10); + if ((scr_read(ap, SCR_STATUS) & 0xf) != 1) + break; + } while (time_before(jiffies, timeout)); - if (ap->flags & ATA_FLAG_PORT_DISABLED) { - VPRINTK("Port disabled pre-sig. Exiting.\n"); + VPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x " + "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS), + mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL)); + + if (sata_dev_present(ap)) { + ata_port_probe(ap); + } else { + printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n", + ap->id, scr_read(ap, SCR_STATUS)); + ata_port_disable(ap); return; } + ap->cbl = ATA_CBL_SATA; tf.lbah = readb((void __iomem *) ap->ioaddr.lbah_addr); tf.lbam = readb((void __iomem *) ap->ioaddr.lbam_addr); @@ -636,28 +1115,76 @@ static void mv_phy_reset(struct ata_port *ap) VPRINTK("EXIT\n"); } -static void mv_port_init(struct ata_ioports *port, unsigned long base) +static void mv_eng_timeout(struct ata_port *ap) { - /* PIO related setup */ - port->data_addr = base + SHD_PIO_DATA_OFS; - port->error_addr = port->feature_addr = base + SHD_FEA_ERR_OFS; - port->nsect_addr = base + SHD_SECT_CNT_OFS; - port->lbal_addr = base + SHD_LBA_L_OFS; - port->lbam_addr = base + SHD_LBA_M_OFS; - port->lbah_addr = base + SHD_LBA_H_OFS; - port->device_addr = base + SHD_DEV_HD_OFS; - port->status_addr = port->command_addr = base + SHD_CMD_STA_OFS; - port->altstatus_addr = port->ctl_addr = base + SHD_CTL_AST_OFS; - /* unused */ + struct ata_queued_cmd *qc; + unsigned long flags; + + printk(KERN_ERR "ata%u: Entering mv_eng_timeout\n",ap->id); + DPRINTK("All regs @ start of eng_timeout\n"); + mv_dump_all_regs(ap->host_set->mmio_base, ap->port_no, + to_pci_dev(ap->host_set->dev)); + + qc = ata_qc_from_tag(ap, ap->active_tag); + printk(KERN_ERR "mmio_base %p ap %p qc %p scsi_cmnd %p &cmnd %p\n", + ap->host_set->mmio_base, ap, qc, qc->scsicmd, + &qc->scsicmd->cmnd); + + mv_err_intr(ap); + mv_phy_reset(ap); + + if (!qc) { + printk(KERN_ERR "ata%u: BUG: timeout without command\n", + ap->id); + } else { + /* hack alert! We cannot use the supplied completion + * function from inside the ->eh_strategy_handler() thread. + * libata is the only user of ->eh_strategy_handler() in + * any kernel, so the default scsi_done() assumes it is + * not being called from the SCSI EH. + */ + spin_lock_irqsave(&ap->host_set->lock, flags); + qc->scsidone = scsi_finish_command; + ata_qc_complete(qc, ATA_ERR); + spin_unlock_irqrestore(&ap->host_set->lock, flags); + } +} + +static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio) +{ + unsigned long shd_base = (unsigned long) port_mmio + SHD_BLK_OFS; + unsigned serr_ofs; + + /* PIO related setup + */ + port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA); + port->error_addr = + port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR); + port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT); + port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL); + port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM); + port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH); + port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE); + port->status_addr = + port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS); + /* special case: control/altstatus doesn't have ATA_REG_ address */ + port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST_OFS; + + /* unused: */ port->cmd_addr = port->bmdma_addr = port->scr_addr = 0; + /* Clear any currently outstanding port interrupt conditions */ + serr_ofs = mv_scr_offset(SCR_ERROR); + writelfl(readl(port_mmio + serr_ofs), port_mmio + serr_ofs); + writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); + /* unmask all EDMA error interrupts */ - writel(~0, (void __iomem *)base + EDMA_ERR_IRQ_MASK_OFS); + writelfl(~0, port_mmio + EDMA_ERR_IRQ_MASK_OFS); VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n", - readl((void __iomem *)base + EDMA_CFG_OFS), - readl((void __iomem *)base + EDMA_ERR_IRQ_CAUSE_OFS), - readl((void __iomem *)base + EDMA_ERR_IRQ_MASK_OFS)); + readl(port_mmio + EDMA_CFG_OFS), + readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS), + readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS)); } static int mv_host_init(struct ata_probe_ent *probe_ent) @@ -666,7 +1193,8 @@ static int mv_host_init(struct ata_probe_ent *probe_ent) void __iomem *mmio = probe_ent->mmio_base; void __iomem *port_mmio; - if (mv_master_reset(probe_ent->mmio_base)) { + if ((MV_FLAG_GLBL_SFT_RST & probe_ent->host_flags) && + mv_global_soft_reset(probe_ent->mmio_base)) { rc = 1; goto done; } @@ -676,17 +1204,27 @@ static int mv_host_init(struct ata_probe_ent *probe_ent) for (port = 0; port < probe_ent->n_ports; port++) { port_mmio = mv_port_base(mmio, port); - mv_port_init(&probe_ent->port[port], (unsigned long)port_mmio); + mv_port_init(&probe_ent->port[port], port_mmio); } for (hc = 0; hc < n_hc; hc++) { - VPRINTK("HC%i: HC config=0x%08x HC IRQ cause=0x%08x\n", hc, - readl(mv_hc_base(mmio, hc) + HC_CFG_OFS), - readl(mv_hc_base(mmio, hc) + HC_IRQ_CAUSE_OFS)); + void __iomem *hc_mmio = mv_hc_base(mmio, hc); + + VPRINTK("HC%i: HC config=0x%08x HC IRQ cause " + "(before clear)=0x%08x\n", hc, + readl(hc_mmio + HC_CFG_OFS), + readl(hc_mmio + HC_IRQ_CAUSE_OFS)); + + /* Clear any currently outstanding hc interrupt conditions */ + writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS); } - writel(~HC_MAIN_MASKED_IRQS, mmio + HC_MAIN_IRQ_MASK_OFS); - writel(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS); + /* Clear any currently outstanding host interrupt conditions */ + writelfl(0, mmio + PCI_IRQ_CAUSE_OFS); + + /* and unmask interrupt generation for host regs */ + writelfl(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS); + writelfl(~HC_MAIN_MASKED_IRQS, mmio + HC_MAIN_IRQ_MASK_OFS); VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x " "PCI int cause/mask=0x%08x/0x%08x\n", @@ -694,11 +1232,37 @@ static int mv_host_init(struct ata_probe_ent *probe_ent) readl(mmio + HC_MAIN_IRQ_MASK_OFS), readl(mmio + PCI_IRQ_CAUSE_OFS), readl(mmio + PCI_IRQ_MASK_OFS)); - - done: +done: return rc; } +/* FIXME: complete this */ +static void mv_print_info(struct ata_probe_ent *probe_ent) +{ + struct pci_dev *pdev = to_pci_dev(probe_ent->dev); + struct mv_host_priv *hpriv = probe_ent->private_data; + u8 rev_id, scc; + const char *scc_s; + + /* Use this to determine the HW stepping of the chip so we know + * what errata to workaround + */ + pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id); + + pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc); + if (scc == 0) + scc_s = "SCSI"; + else if (scc == 0x01) + scc_s = "RAID"; + else + scc_s = "unknown"; + + printk(KERN_INFO DRV_NAME + "(%s) %u slots %u ports %s mode IRQ via %s\n", + pci_name(pdev), (unsigned)MV_MAX_Q_DEPTH, probe_ent->n_ports, + scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx"); +} + static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version = 0; @@ -706,16 +1270,12 @@ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) struct mv_host_priv *hpriv; unsigned int board_idx = (unsigned int)ent->driver_data; void __iomem *mmio_base; - int pci_dev_busy = 0; - int rc; + int pci_dev_busy = 0, rc; if (!printed_version++) { - printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); + printk(KERN_INFO DRV_NAME " version " DRV_VERSION "\n"); } - VPRINTK("ENTER for PCI Bus:Slot.Func=%u:%u.%u\n", pdev->bus->number, - PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); - rc = pci_enable_device(pdev); if (rc) { return rc; @@ -727,8 +1287,6 @@ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out; } - pci_intx(pdev, 1); - probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); if (probe_ent == NULL) { rc = -ENOMEM; @@ -739,8 +1297,7 @@ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) probe_ent->dev = pci_dev_to_dev(pdev); INIT_LIST_HEAD(&probe_ent->node); - mmio_base = ioremap_nocache(pci_resource_start(pdev, MV_PRIMARY_BAR), - pci_resource_len(pdev, MV_PRIMARY_BAR)); + mmio_base = pci_iomap(pdev, MV_PRIMARY_BAR, 0); if (mmio_base == NULL) { rc = -ENOMEM; goto err_out_free_ent; @@ -769,37 +1326,40 @@ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) if (rc) { goto err_out_hpriv; } -/* mv_print_info(probe_ent); */ - { - int b, w; - u32 dw[4]; /* hold a line of 16b */ - VPRINTK("PCI config space:\n"); - for (b = 0; b < 0x40; ) { - for (w = 0; w < 4; w++) { - (void) pci_read_config_dword(pdev,b,&dw[w]); - b += sizeof(*dw); - } - VPRINTK("%08x %08x %08x %08x\n", - dw[0],dw[1],dw[2],dw[3]); - } + /* Enable interrupts */ + if (pci_enable_msi(pdev) == 0) { + hpriv->hp_flags |= MV_HP_FLAG_MSI; + } else { + pci_intx(pdev, 1); } - /* FIXME: check ata_device_add return value */ - ata_device_add(probe_ent); - kfree(probe_ent); + mv_dump_pci_cfg(pdev, 0x68); + mv_print_info(probe_ent); + if (ata_device_add(probe_ent) == 0) { + rc = -ENODEV; /* No devices discovered */ + goto err_out_dev_add; + } + + kfree(probe_ent); return 0; - err_out_hpriv: +err_out_dev_add: + if (MV_HP_FLAG_MSI & hpriv->hp_flags) { + pci_disable_msi(pdev); + } else { + pci_intx(pdev, 0); + } +err_out_hpriv: kfree(hpriv); - err_out_iounmap: - iounmap(mmio_base); - err_out_free_ent: +err_out_iounmap: + pci_iounmap(pdev, mmio_base); +err_out_free_ent: kfree(probe_ent); - err_out_regions: +err_out_regions: pci_release_regions(pdev); - err_out: +err_out: if (!pci_dev_busy) { pci_disable_device(pdev); } From fe998aa7e27f125f6768ec6b137b0ce2c9790509 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 2 Oct 2005 11:54:29 +0900 Subject: [PATCH 20/59] [PATCH] libata: add ATA exceptions chapter to doc Hello, Jeff. This patch adds ATA errors & exceptions chapter to Documentation/DocBook/libata.tmpl. As suggested, the chapter is placed before low level driver specific chapters. Contents are unchanged from the last posting. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- Documentation/DocBook/libata.tmpl | 716 ++++++++++++++++++++++++++++++ 1 file changed, 716 insertions(+) diff --git a/Documentation/DocBook/libata.tmpl b/Documentation/DocBook/libata.tmpl index b2ec780bcda1..d260d92089ad 100644 --- a/Documentation/DocBook/libata.tmpl +++ b/Documentation/DocBook/libata.tmpl @@ -787,6 +787,722 @@ and other resources, etc. !Idrivers/scsi/libata-scsi.c + + ATA errors & exceptions + + + This chapter tries to identify what error/exception conditions exist + for ATA/ATAPI devices and describe how they should be handled in + implementation-neutral way. + + + + The term 'error' is used to describe conditions where either an + explicit error condition is reported from device or a command has + timed out. + + + + The term 'exception' is either used to describe exceptional + conditions which are not errors (say, power or hotplug events), or + to describe both errors and non-error exceptional conditions. Where + explicit distinction between error and exception is necessary, the + term 'non-error exception' is used. + + + + Exception categories + + Exceptions are described primarily with respect to legacy + taskfile + bus master IDE interface. If a controller provides + other better mechanism for error reporting, mapping those into + categories described below shouldn't be difficult. + + + + In the following sections, two recovery actions - reset and + reconfiguring transport - are mentioned. These are described + further in . + + + + HSM violation + + This error is indicated when STATUS value doesn't match HSM + requirement during issuing or excution any ATA/ATAPI command. + + + + Examples + + + + ATA_STATUS doesn't contain !BSY && DRDY && !DRQ while trying + to issue a command. + + + + + + !BSY && !DRQ during PIO data transfer. + + + + + + DRQ on command completion. + + + + + + !BSY && ERR after CDB tranfer starts but before the + last byte of CDB is transferred. ATA/ATAPI standard states + that "The device shall not terminate the PACKET command + with an error before the last byte of the command packet has + been written" in the error outputs description of PACKET + command and the state diagram doesn't include such + transitions. + + + + + + + In these cases, HSM is violated and not much information + regarding the error can be acquired from STATUS or ERROR + register. IOW, this error can be anything - driver bug, + faulty device, controller and/or cable. + + + + As HSM is violated, reset is necessary to restore known state. + Reconfiguring transport for lower speed might be helpful too + as transmission errors sometimes cause this kind of errors. + + + + + ATA/ATAPI device error (non-NCQ / non-CHECK CONDITION) + + + These are errors detected and reported by ATA/ATAPI devices + indicating device problems. For this type of errors, STATUS + and ERROR register values are valid and describe error + condition. Note that some of ATA bus errors are detected by + ATA/ATAPI devices and reported using the same mechanism as + device errors. Those cases are described later in this + section. + + + + For ATA commands, this type of errors are indicated by !BSY + && ERR during command execution and on completion. + + + For ATAPI commands, + + + + + + !BSY && ERR && ABRT right after issuing PACKET + indicates that PACKET command is not supported and falls in + this category. + + + + + + !BSY && ERR(==CHK) && !ABRT after the last + byte of CDB is transferred indicates CHECK CONDITION and + doesn't fall in this category. + + + + + + !BSY && ERR(==CHK) && ABRT after the last byte + of CDB is transferred *probably* indicates CHECK CONDITION and + doesn't fall in this category. + + + + + + + Of errors detected as above, the followings are not ATA/ATAPI + device errors but ATA bus errors and should be handled + according to . + + + + + + CRC error during data transfer + + + This is indicated by ICRC bit in the ERROR register and + means that corruption occurred during data transfer. Upto + ATA/ATAPI-7, the standard specifies that this bit is only + applicable to UDMA transfers but ATA/ATAPI-8 draft revision + 1f says that the bit may be applicable to multiword DMA and + PIO. + + + + + + ABRT error during data transfer or on completion + + + Upto ATA/ATAPI-7, the standard specifies that ABRT could be + set on ICRC errors and on cases where a device is not able + to complete a command. Combined with the fact that MWDMA + and PIO transfer errors aren't allowed to use ICRC bit upto + ATA/ATAPI-7, it seems to imply that ABRT bit alone could + indicate tranfer errors. + + + However, ATA/ATAPI-8 draft revision 1f removes the part + that ICRC errors can turn on ABRT. So, this is kind of + gray area. Some heuristics are needed here. + + + + + + + + ATA/ATAPI device errors can be further categorized as follows. + + + + + + Media errors + + + This is indicated by UNC bit in the ERROR register. ATA + devices reports UNC error only after certain number of + retries cannot recover the data, so there's nothing much + else to do other than notifying upper layer. + + + READ and WRITE commands report CHS or LBA of the first + failed sector but ATA/ATAPI standard specifies that the + amount of transferred data on error completion is + indeterminate, so we cannot assume that sectors preceding + the failed sector have been transferred and thus cannot + complete those sectors successfully as SCSI does. + + + + + + Media changed / media change requested error + + + <<TODO: fill here>> + + + + + Address error + + + This is indicated by IDNF bit in the ERROR register. + Report to upper layer. + + + + + Other errors + + + This can be invalid command or parameter indicated by ABRT + ERROR bit or some other error condition. Note that ABRT + bit can indicate a lot of things including ICRC and Address + errors. Heuristics needed. + + + + + + + + Depending on commands, not all STATUS/ERROR bits are + applicable. These non-applicable bits are marked with + "na" in the output descriptions but upto ATA/ATAPI-7 + no definition of "na" can be found. However, + ATA/ATAPI-8 draft revision 1f describes "N/A" as + follows. + + +
+ + 3.2.3.3a N/A + + + A keyword the indicates a field has no defined value in + this standard and should not be checked by the host or + device. N/A fields should be cleared to zero. + + + + +
+ + + So, it seems reasonable to assume that "na" bits are + cleared to zero by devices and thus need no explicit masking. + + + + + + ATAPI device CHECK CONDITION + + + ATAPI device CHECK CONDITION error is indicated by set CHK bit + (ERR bit) in the STATUS register after the last byte of CDB is + transferred for a PACKET command. For this kind of errors, + sense data should be acquired to gather information regarding + the errors. REQUEST SENSE packet command should be used to + acquire sense data. + + + + Once sense data is acquired, this type of errors can be + handled similary to other SCSI errors. Note that sense data + may indicate ATA bus error (e.g. Sense Key 04h HARDWARE ERROR + && ASC/ASCQ 47h/00h SCSI PARITY ERROR). In such + cases, the error should be considered as an ATA bus error and + handled according to . + + + + + + ATA device error (NCQ) + + + NCQ command error is indicated by cleared BSY and set ERR bit + during NCQ command phase (one or more NCQ commands + outstanding). Although STATUS and ERROR registers will + contain valid values describing the error, READ LOG EXT is + required to clear the error condition, determine which command + has failed and acquire more information. + + + + READ LOG EXT Log Page 10h reports which tag has failed and + taskfile register values describing the error. With this + information the failed command can be handled as a normal ATA + command error as in and all + other in-flight commands must be retried. Note that this + retry should not be counted - it's likely that commands + retried this way would have completed normally if it were not + for the failed command. + + + + Note that ATA bus errors can be reported as ATA device NCQ + errors. This should be handled as described in . + + + + If READ LOG EXT Log Page 10h fails or reports NQ, we're + thoroughly screwed. This condition should be treated + according to . + + + + + + ATA bus error + + + ATA bus error means that data corruption occurred during + transmission over ATA bus (SATA or PATA). This type of errors + can be indicated by + + + + + + + ICRC or ABRT error as described in . + + + + + + Controller-specific error completion with error information + indicating transmission error. + + + + + + On some controllers, command timeout. In this case, there may + be a mechanism to determine that the timeout is due to + transmission error. + + + + + + Unknown/random errors, timeouts and all sorts of weirdities. + + + + + + + As described above, transmission errors can cause wide variety + of symptoms ranging from device ICRC error to random device + lockup, and, for many cases, there is no way to tell if an + error condition is due to transmission error or not; + therefore, it's necessary to employ some kind of heuristic + when dealing with errors and timeouts. For example, + encountering repetitive ABRT errors for known supported + command is likely to indicate ATA bus error. + + + + Once it's determined that ATA bus errors have possibly + occurred, lowering ATA bus transmission speed is one of + actions which may alleviate the problem. See for more information. + + + + + + PCI bus error + + + Data corruption or other failures during transmission over PCI + (or other system bus). For standard BMDMA, this is indicated + by Error bit in the BMDMA Status register. This type of + errors must be logged as it indicates something is very wrong + with the system. Resetting host controller is recommended. + + + + + + Late completion + + + This occurs when timeout occurs and the timeout handler finds + out that the timed out command has completed successfully or + with error. This is usually caused by lost interrupts. This + type of errors must be logged. Resetting host controller is + recommended. + + + + + + Unknown error (timeout) + + + This is when timeout occurs and the command is still + processing or the host and device are in unknown state. When + this occurs, HSM could be in any valid or invalid state. To + bring the device to known state and make it forget about the + timed out command, resetting is necessary. The timed out + command may be retried. + + + + Timeouts can also be caused by transmission errors. Refer to + for more details. + + + + + + Hotplug and power management exceptions + + + <<TODO: fill here>> + + + + + + + + EH recovery actions + + + This section discusses several important recovery actions. + + + + Clearing error condition + + + Many controllers require its error registers to be cleared by + error handler. Different controllers may have different + requirements. + + + + For SATA, it's strongly recommended to clear at least SError + register during error handling. + + + + + Reset + + + During EH, resetting is necessary in the following cases. + + + + + + + HSM is in unknown or invalid state + + + + + + HBA is in unknown or invalid state + + + + + + EH needs to make HBA/device forget about in-flight commands + + + + + + HBA/device behaves weirdly + + + + + + + Resetting during EH might be a good idea regardless of error + condition to improve EH robustness. Whether to reset both or + either one of HBA and device depends on situation but the + following scheme is recommended. + + + + + + + When it's known that HBA is in ready state but ATA/ATAPI + device in in unknown state, reset only device. + + + + + + If HBA is in unknown state, reset both HBA and device. + + + + + + + HBA resetting is implementation specific. For a controller + complying to taskfile/BMDMA PCI IDE, stopping active DMA + transaction may be sufficient iff BMDMA state is the only HBA + context. But even mostly taskfile/BMDMA PCI IDE complying + controllers may have implementation specific requirements and + mechanism to reset themselves. This must be addressed by + specific drivers. + + + + OTOH, ATA/ATAPI standard describes in detail ways to reset + ATA/ATAPI devices. + + + + + PATA hardware reset + + + This is hardware initiated device reset signalled with + asserted PATA RESET- signal. There is no standard way to + initiate hardware reset from software although some + hardware provides registers that allow driver to directly + tweak the RESET- signal. + + + + + Software reset + + + This is achieved by turning CONTROL SRST bit on for at + least 5us. Both PATA and SATA support it but, in case of + SATA, this may require controller-specific support as the + second Register FIS to clear SRST should be transmitted + while BSY bit is still set. Note that on PATA, this resets + both master and slave devices on a channel. + + + + + EXECUTE DEVICE DIAGNOSTIC command + + + Although ATA/ATAPI standard doesn't describe exactly, EDD + implies some level of resetting, possibly similar level + with software reset. Host-side EDD protocol can be handled + with normal command processing and most SATA controllers + should be able to handle EDD's just like other commands. + As in software reset, EDD affects both devices on a PATA + bus. + + + Although EDD does reset devices, this doesn't suit error + handling as EDD cannot be issued while BSY is set and it's + unclear how it will act when device is in unknown/weird + state. + + + + + ATAPI DEVICE RESET command + + + This is very similar to software reset except that reset + can be restricted to the selected device without affecting + the other device sharing the cable. + + + + + SATA phy reset + + + This is the preferred way of resetting a SATA device. In + effect, it's identical to PATA hardware reset. Note that + this can be done with the standard SCR Control register. + As such, it's usually easier to implement than software + reset. + + + + + + + + One more thing to consider when resetting devices is that + resetting clears certain configuration parameters and they + need to be set to their previous or newly adjusted values + after reset. + + + + Parameters affected are. + + + + + + + CHS set up with INITIALIZE DEVICE PARAMETERS (seldomly used) + + + + + + Parameters set with SET FEATURES including transfer mode setting + + + + + + Block count set with SET MULTIPLE MODE + + + + + + Other parameters (SET MAX, MEDIA LOCK...) + + + + + + + ATA/ATAPI standard specifies that some parameters must be + maintained across hardware or software reset, but doesn't + strictly specify all of them. Always reconfiguring needed + parameters after reset is required for robustness. Note that + this also applies when resuming from deep sleep (power-off). + + + + Also, ATA/ATAPI standard requires that IDENTIFY DEVICE / + IDENTIFY PACKET DEVICE is issued after any configuration + parameter is updated or a hardware reset and the result used + for further operation. OS driver is required to implement + revalidation mechanism to support this. + + + + + + Reconfigure transport + + + For both PATA and SATA, a lot of corners are cut for cheap + connectors, cables or controllers and it's quite common to see + high transmission error rate. This can be mitigated by + lowering transmission speed. + + + + The following is a possible scheme Jeff Garzik suggested. + + +
+ + If more than $N (3?) transmission errors happen in 15 minutes, + + + + + if SATA, decrease SATA PHY speed. if speed cannot be decreased, + + + + + decrease UDMA xfer speed. if at UDMA0, switch to PIO4, + + + + + decrease PIO xfer speed. if at PIO3, complain, but continue + + + +
+ + + + + + + ata_piix Internals !Idrivers/scsi/ata_piix.c From 47a8659380d40d5c0786ddb62a89b3f7f1392430 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 4 Oct 2005 08:09:19 -0400 Subject: [PATCH 21/59] libata: bitmask based pci init functions for one or two ports This redoes the n_ports logic I proposed before as a bitmask. ata_pci_init_native_mode is now used with a mask allowing for mixed mode stuff later on. ata_pci_init_legacy_port is called with port number and does one port now not two. Instead it is called twice by the ata init logic which cleans both of them up. There are stil limits in the original code left over - IRQ/port mapping for legacy mode should be arch specific values - You can have one legacy mode IDE adapter per PCI root bridge on some systems - Doesn't handle mixed mode devices yet (but is now a lot closer to it) --- drivers/scsi/libata-core.c | 131 +++++++++++++++++++++---------------- drivers/scsi/sata_nv.c | 2 +- drivers/scsi/sata_sis.c | 2 +- drivers/scsi/sata_uli.c | 2 +- drivers/scsi/sata_via.c | 2 +- include/linux/libata.h | 6 +- 6 files changed, 84 insertions(+), 61 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 03d422e99e58..82ec7f30bf3f 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -4363,85 +4363,87 @@ void ata_pci_host_stop (struct ata_host_set *host_set) * ata_pci_init_native_mode - Initialize native-mode driver * @pdev: pci device to be initialized * @port: array[2] of pointers to port info structures. + * @ports: bitmap of ports present * * Utility function which allocates and initializes an * ata_probe_ent structure for a standard dual-port * PIO-based IDE controller. The returned ata_probe_ent * structure can be passed to ata_device_add(). The returned * ata_probe_ent structure should then be freed with kfree(). + * + * The caller need only pass the address of the primary port, the + * secondary will be deduced automatically. If the device has non + * standard secondary port mappings this function can be called twice, + * once for each interface. */ struct ata_probe_ent * -ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port) +ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports) { struct ata_probe_ent *probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); + int p = 0; + if (!probe_ent) return NULL; - probe_ent->n_ports = 2; probe_ent->irq = pdev->irq; probe_ent->irq_flags = SA_SHIRQ; - probe_ent->port[0].cmd_addr = pci_resource_start(pdev, 0); - probe_ent->port[0].altstatus_addr = - probe_ent->port[0].ctl_addr = - pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS; - probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4); + if (ports & ATA_PORT_PRIMARY) { + probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 0); + probe_ent->port[p].altstatus_addr = + probe_ent->port[p].ctl_addr = + pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS; + probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4); + ata_std_ports(&probe_ent->port[p]); + p++; + } - probe_ent->port[1].cmd_addr = pci_resource_start(pdev, 2); - probe_ent->port[1].altstatus_addr = - probe_ent->port[1].ctl_addr = - pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS; - probe_ent->port[1].bmdma_addr = pci_resource_start(pdev, 4) + 8; - - ata_std_ports(&probe_ent->port[0]); - ata_std_ports(&probe_ent->port[1]); + if (ports & ATA_PORT_SECONDARY) { + probe_ent->port[p].cmd_addr = pci_resource_start(pdev, 2); + probe_ent->port[p].altstatus_addr = + probe_ent->port[p].ctl_addr = + pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS; + probe_ent->port[p].bmdma_addr = pci_resource_start(pdev, 4) + 8; + ata_std_ports(&probe_ent->port[p]); + p++; + } + probe_ent->n_ports = p; return probe_ent; } -static struct ata_probe_ent * -ata_pci_init_legacy_mode(struct pci_dev *pdev, struct ata_port_info **port, - struct ata_probe_ent **ppe2) +static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, struct ata_port_info **port, int port_num) { - struct ata_probe_ent *probe_ent, *probe_ent2; + struct ata_probe_ent *probe_ent; probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]); if (!probe_ent) return NULL; - probe_ent2 = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[1]); - if (!probe_ent2) { - kfree(probe_ent); - return NULL; - } - probe_ent->n_ports = 1; - probe_ent->irq = 14; - - probe_ent->hard_port_no = 0; + probe_ent->legacy_mode = 1; + probe_ent->n_ports = 1; + probe_ent->hard_port_no = port_num; - probe_ent2->n_ports = 1; - probe_ent2->irq = 15; - - probe_ent2->hard_port_no = 1; - probe_ent2->legacy_mode = 1; - - probe_ent->port[0].cmd_addr = 0x1f0; - probe_ent->port[0].altstatus_addr = - probe_ent->port[0].ctl_addr = 0x3f6; - probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4); - - probe_ent2->port[0].cmd_addr = 0x170; - probe_ent2->port[0].altstatus_addr = - probe_ent2->port[0].ctl_addr = 0x376; - probe_ent2->port[0].bmdma_addr = pci_resource_start(pdev, 4)+8; - + switch(port_num) + { + case 0: + probe_ent->irq = 14; + probe_ent->port[0].cmd_addr = 0x1f0; + probe_ent->port[0].altstatus_addr = + probe_ent->port[0].ctl_addr = 0x3f6; + break; + case 1: + probe_ent->irq = 15; + probe_ent->port[0].cmd_addr = 0x170; + probe_ent->port[0].altstatus_addr = + probe_ent->port[0].ctl_addr = 0x376; + break; + } + probe_ent->port[0].bmdma_addr = pci_resource_start(pdev, 4) + 8 * port_num; ata_std_ports(&probe_ent->port[0]); - ata_std_ports(&probe_ent2->port[0]); - - *ppe2 = probe_ent2; return probe_ent; } @@ -4470,7 +4472,7 @@ ata_pci_init_legacy_mode(struct pci_dev *pdev, struct ata_port_info **port, int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, unsigned int n_ports) { - struct ata_probe_ent *probe_ent, *probe_ent2 = NULL; + struct ata_probe_ent *probe_ent = NULL, *probe_ent2 = NULL; struct ata_port_info *port[2]; u8 tmp8, mask; unsigned int legacy_mode = 0; @@ -4487,7 +4489,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, if ((port[0]->host_flags & ATA_FLAG_NO_LEGACY) == 0 && (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { - /* TODO: support transitioning to native mode? */ + /* TODO: What if one channel is in native mode ... */ pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); mask = (1 << 2) | (1 << 0); if ((tmp8 & mask) != mask) @@ -4495,11 +4497,20 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, } /* FIXME... */ - if ((!legacy_mode) && (n_ports > 1)) { - printk(KERN_ERR "ata: BUG: native mode, n_ports > 1\n"); - return -EINVAL; + if ((!legacy_mode) && (n_ports > 2)) { + printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n"); + n_ports = 2; + /* For now */ } + /* FIXME: Really for ATA it isn't safe because the device may be + multi-purpose and we want to leave it alone if it was already + enabled. Secondly for shared use as Arjan says we want refcounting + + Checking dev->is_enabled is insufficient as this is not set at + boot for the primary video which is BIOS enabled + */ + rc = pci_enable_device(pdev); if (rc) return rc; @@ -4510,6 +4521,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, goto err_out; } + /* FIXME: Should use platform specific mappers for legacy port ranges */ if (legacy_mode) { if (!request_region(0x1f0, 8, "libata")) { struct resource *conflict, res; @@ -4554,10 +4566,17 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, goto err_out_regions; if (legacy_mode) { - probe_ent = ata_pci_init_legacy_mode(pdev, port, &probe_ent2); - } else - probe_ent = ata_pci_init_native_mode(pdev, port); - if (!probe_ent) { + if (legacy_mode & (1 << 0)) + probe_ent = ata_pci_init_legacy_port(pdev, port, 0); + if (legacy_mode & (1 << 1)) + probe_ent2 = ata_pci_init_legacy_port(pdev, port, 1); + } else { + if (n_ports == 2) + probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); + else + probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY); + } + if (!probe_ent && !probe_ent2) { rc = -ENOMEM; goto err_out_regions; } diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c index c05653c7779d..749ff92d8c63 100644 --- a/drivers/scsi/sata_nv.c +++ b/drivers/scsi/sata_nv.c @@ -405,7 +405,7 @@ static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) rc = -ENOMEM; ppi = &nv_port_info; - probe_ent = ata_pci_init_native_mode(pdev, &ppi); + probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); if (!probe_ent) goto err_out_regions; diff --git a/drivers/scsi/sata_sis.c b/drivers/scsi/sata_sis.c index b227e51d12f4..0761a3234fcf 100644 --- a/drivers/scsi/sata_sis.c +++ b/drivers/scsi/sata_sis.c @@ -263,7 +263,7 @@ static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out_regions; ppi = &sis_port_info; - probe_ent = ata_pci_init_native_mode(pdev, &ppi); + probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); if (!probe_ent) { rc = -ENOMEM; goto err_out_regions; diff --git a/drivers/scsi/sata_uli.c b/drivers/scsi/sata_uli.c index 4c9fb8b71be1..9c06f2abe7f7 100644 --- a/drivers/scsi/sata_uli.c +++ b/drivers/scsi/sata_uli.c @@ -202,7 +202,7 @@ static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) goto err_out_regions; ppi = &uli_port_info; - probe_ent = ata_pci_init_native_mode(pdev, &ppi); + probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); if (!probe_ent) { rc = -ENOMEM; goto err_out_regions; diff --git a/drivers/scsi/sata_via.c b/drivers/scsi/sata_via.c index 128b996b07b7..565872479b9a 100644 --- a/drivers/scsi/sata_via.c +++ b/drivers/scsi/sata_via.c @@ -212,7 +212,7 @@ static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev) struct ata_probe_ent *probe_ent; struct ata_port_info *ppi = &svia_port_info; - probe_ent = ata_pci_init_native_mode(pdev, &ppi); + probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY); if (!probe_ent) return NULL; diff --git a/include/linux/libata.h b/include/linux/libata.h index 4739a75b983d..4d45179872cc 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -155,6 +155,10 @@ enum { ATA_SHIFT_UDMA = 0, ATA_SHIFT_MWDMA = 8, ATA_SHIFT_PIO = 11, + + /* Masks for port functions */ + ATA_PORT_PRIMARY = (1 << 0), + ATA_PORT_SECONDARY = (1 << 1), }; enum hsm_task_states { @@ -458,7 +462,7 @@ struct pci_bits { extern void ata_pci_host_stop (struct ata_host_set *host_set); extern struct ata_probe_ent * -ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port); +ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); #endif /* CONFIG_PCI */ From c187c4b58a9caff660a4c8ae39d0def88cc449af Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Tue, 4 Oct 2005 08:46:51 -0400 Subject: [PATCH 22/59] libata: minor whitespace, comment, debug message updates --- drivers/scsi/libata-scsi.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 03b7a6dd95fe..d67c3fc98f7b 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -589,7 +589,8 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) head = track % dev->heads; sect = (u32)block % dev->sectors + 1; - DPRINTK("block[%u] track[%u] cyl[%u] head[%u] sect[%u] \n", (u32)block, track, cyl, head, sect); + DPRINTK("block %u track %u cyl %u head %u sect %u\n", + (u32)block, track, cyl, head, sect); /* Check whether the converted CHS can fit. Cylinder: 0-65535 @@ -665,6 +666,10 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) block |= ((u64)scsicmd[3]); n_block |= ((u32)scsicmd[4]); + + /* for 6-byte r/w commands, transfer length 0 + * means 256 blocks of data, not 0 block. + */ if (!n_block) n_block = 256; @@ -692,7 +697,11 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) /* Check and compose ATA command */ if (!n_block) - /* In ATA, sector count 0 means 256 or 65536 sectors, not 0 sectors. */ + /* For 10-byte and 16-byte SCSI R/W commands, transfer + * length 0 means transfer 0 block of data. + * However, for ATA R/W commands, sector count 0 means + * 256 or 65536 sectors, not 0 sectors as in SCSI. + */ return 1; if (lba) { @@ -715,7 +724,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) tf->device |= (block >> 24) & 0xf; } - + qc->nsect = n_block; tf->nsect = n_block & 0xff; @@ -731,23 +740,23 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) /* The request -may- be too large for CHS addressing. */ if ((block >> 28) || (n_block > 256)) return 1; - + /* Convert LBA to CHS */ track = (u32)block / dev->sectors; cyl = track / dev->heads; head = track % dev->heads; sect = (u32)block % dev->sectors + 1; - DPRINTK("block[%u] track[%u] cyl[%u] head[%u] sect[%u] \n", + DPRINTK("block %u track %u cyl %u head %u sect %u\n", (u32)block, track, cyl, head, sect); - + /* Check whether the converted CHS can fit. Cylinder: 0-65535 Head: 0-15 Sector: 1-255*/ - if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) + if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) return 1; - + qc->nsect = n_block; tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ tf->lbal = sect; From 3aef52311bcb1f88aa5c786302f1ae14a787f61e Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Tue, 4 Oct 2005 08:47:43 -0400 Subject: [PATCH 23/59] [libata scsi] tidy up SCSI lba and xfer len calculations move the redundant SCSI lba and transfer length calculation code from ata_scsi_verify_xlat() and ata_scsi_rw_xlat() to common functions. --- drivers/scsi/libata-scsi.c | 179 ++++++++++++++++++++++++------------- 1 file changed, 115 insertions(+), 64 deletions(-) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index d67c3fc98f7b..22434e0d4e75 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -487,6 +487,99 @@ static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) return 0; } +/** + * scsi_6_lba_len - Get LBA and transfer length + * @scsicmd: SCSI command to translate + * + * Calculate LBA and transfer length for 6-byte commands. + * + * RETURNS: + * @plba: the LBA + * @plen: the transfer length + */ + +static void scsi_6_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) +{ + u64 lba = 0; + u32 len = 0; + + VPRINTK("six-byte command\n"); + + lba |= ((u64)scsicmd[2]) << 8; + lba |= ((u64)scsicmd[3]); + + len |= ((u32)scsicmd[4]); + + *plba = lba; + *plen = len; +} + +/** + * scsi_10_lba_len - Get LBA and transfer length + * @scsicmd: SCSI command to translate + * + * Calculate LBA and transfer length for 10-byte commands. + * + * RETURNS: + * @plba: the LBA + * @plen: the transfer length + */ + +static void scsi_10_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) +{ + u64 lba = 0; + u32 len = 0; + + VPRINTK("ten-byte command\n"); + + lba |= ((u64)scsicmd[2]) << 24; + lba |= ((u64)scsicmd[3]) << 16; + lba |= ((u64)scsicmd[4]) << 8; + lba |= ((u64)scsicmd[5]); + + len |= ((u32)scsicmd[7]) << 8; + len |= ((u32)scsicmd[8]); + + *plba = lba; + *plen = len; +} + +/** + * scsi_16_lba_len - Get LBA and transfer length + * @scsicmd: SCSI command to translate + * + * Calculate LBA and transfer length for 16-byte commands. + * + * RETURNS: + * @plba: the LBA + * @plen: the transfer length + */ + +static void scsi_16_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) +{ + u64 lba = 0; + u32 len = 0; + + VPRINTK("sixteen-byte command\n"); + + lba |= ((u64)scsicmd[2]) << 56; + lba |= ((u64)scsicmd[3]) << 48; + lba |= ((u64)scsicmd[4]) << 40; + lba |= ((u64)scsicmd[5]) << 32; + lba |= ((u64)scsicmd[6]) << 24; + lba |= ((u64)scsicmd[7]) << 16; + lba |= ((u64)scsicmd[8]) << 8; + lba |= ((u64)scsicmd[9]); + + len |= ((u32)scsicmd[10]) << 24; + len |= ((u32)scsicmd[11]) << 16; + len |= ((u32)scsicmd[12]) << 8; + len |= ((u32)scsicmd[13]); + + *plba = lba; + *plen = len; +} + /** * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one * @qc: Storage for translated ATA taskfile @@ -508,38 +601,16 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) unsigned int lba = tf->flags & ATA_TFLAG_LBA; unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; u64 dev_sectors = qc->dev->n_sectors; - u64 block = 0; - u32 n_block = 0; + u64 block; + u32 n_block; tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf->protocol = ATA_PROT_NODATA; - if (scsicmd[0] == VERIFY) { - block |= ((u64)scsicmd[2]) << 24; - block |= ((u64)scsicmd[3]) << 16; - block |= ((u64)scsicmd[4]) << 8; - block |= ((u64)scsicmd[5]); - - n_block |= ((u32)scsicmd[7]) << 8; - n_block |= ((u32)scsicmd[8]); - } - - else if (scsicmd[0] == VERIFY_16) { - block |= ((u64)scsicmd[2]) << 56; - block |= ((u64)scsicmd[3]) << 48; - block |= ((u64)scsicmd[4]) << 40; - block |= ((u64)scsicmd[5]) << 32; - block |= ((u64)scsicmd[6]) << 24; - block |= ((u64)scsicmd[7]) << 16; - block |= ((u64)scsicmd[8]) << 8; - block |= ((u64)scsicmd[9]); - - n_block |= ((u32)scsicmd[10]) << 24; - n_block |= ((u32)scsicmd[11]) << 16; - n_block |= ((u32)scsicmd[12]) << 8; - n_block |= ((u32)scsicmd[13]); - } - + if (scsicmd[0] == VERIFY) + scsi_10_lba_len(scsicmd, &block, &n_block); + else if (scsicmd[0] == VERIFY_16) + scsi_16_lba_len(scsicmd, &block, &n_block); else return 1; @@ -636,8 +707,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) struct ata_device *dev = qc->dev; unsigned int lba = tf->flags & ATA_TFLAG_LBA; unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; - u64 block = 0; - u32 n_block = 0; + u64 block; + u32 n_block; tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf->protocol = qc->dev->xfer_protocol; @@ -651,46 +722,26 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) } /* Calculate the SCSI LBA and transfer length. */ - if (scsicmd[0] == READ_10 || scsicmd[0] == WRITE_10) { - block |= ((u64)scsicmd[2]) << 24; - block |= ((u64)scsicmd[3]) << 16; - block |= ((u64)scsicmd[4]) << 8; - block |= ((u64)scsicmd[5]); - - n_block |= ((u32)scsicmd[7]) << 8; - n_block |= ((u32)scsicmd[8]); - - VPRINTK("ten-byte command\n"); - } else if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) { - block |= ((u64)scsicmd[2]) << 8; - block |= ((u64)scsicmd[3]); - - n_block |= ((u32)scsicmd[4]); + switch (scsicmd[0]) { + case READ_10: + case WRITE_10: + scsi_10_lba_len(scsicmd, &block, &n_block); + break; + case READ_6: + case WRITE_6: + scsi_6_lba_len(scsicmd, &block, &n_block); /* for 6-byte r/w commands, transfer length 0 * means 256 blocks of data, not 0 block. */ if (!n_block) n_block = 256; - - VPRINTK("six-byte command\n"); - } else if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) { - block |= ((u64)scsicmd[2]) << 56; - block |= ((u64)scsicmd[3]) << 48; - block |= ((u64)scsicmd[4]) << 40; - block |= ((u64)scsicmd[5]) << 32; - block |= ((u64)scsicmd[6]) << 24; - block |= ((u64)scsicmd[7]) << 16; - block |= ((u64)scsicmd[8]) << 8; - block |= ((u64)scsicmd[9]); - - n_block |= ((u32)scsicmd[10]) << 24; - n_block |= ((u32)scsicmd[11]) << 16; - n_block |= ((u32)scsicmd[12]) << 8; - n_block |= ((u32)scsicmd[13]); - - VPRINTK("sixteen-byte command\n"); - } else { + break; + case READ_16: + case WRITE_16: + scsi_16_lba_len(scsicmd, &block, &n_block); + break; + default: DPRINTK("no-byte command\n"); return 1; } From 9d5b13021375cad2d64d56105e5f4b5f1509ced2 Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Tue, 4 Oct 2005 08:48:17 -0400 Subject: [PATCH 24/59] [libata scsi] add CHS support to ata_scsi_start_stop_xlat() --- drivers/scsi/libata-scsi.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 22434e0d4e75..4982e6eff700 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -435,10 +435,21 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, return 1; /* power conditions not supported */ if (scsicmd[4] & 0x1) { tf->nsect = 1; /* 1 sector, lba=0 */ - tf->lbah = 0x0; - tf->lbam = 0x0; - tf->lbal = 0x0; - tf->device |= ATA_LBA; + + if (qc->dev->flags & ATA_DFLAG_LBA) { + qc->tf.flags |= ATA_TFLAG_LBA; + + tf->lbah = 0x0; + tf->lbam = 0x0; + tf->lbal = 0x0; + tf->device |= ATA_LBA; + } else { + /* CHS */ + tf->lbal = 0x1; /* sect */ + tf->lbam = 0x0; /* cyl low */ + tf->lbah = 0x0; /* cyl high */ + } + tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ } else { tf->nsect = 0; /* time period value (0 implies now) */ From 67846b30171cc4d706125f630193a76a26bb334a Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Wed, 5 Oct 2005 02:58:32 -0400 Subject: [PATCH 25/59] libata: add ata_ratelimit(), use it in AHCI driver irq handler --- drivers/scsi/ahci.c | 31 +++++++++++++++++++++++++------ drivers/scsi/libata-core.c | 23 +++++++++++++++++++++++ include/linux/libata.h | 2 ++ 3 files changed, 50 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index c2c8fa828e24..5ec866b00479 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -672,17 +672,36 @@ static irqreturn_t ahci_interrupt (int irq, void *dev_instance, struct pt_regs * for (i = 0; i < host_set->n_ports; i++) { struct ata_port *ap; - u32 tmp; - VPRINTK("port %u\n", i); + if (!(irq_stat & (1 << i))) + continue; + ap = host_set->ports[i]; - tmp = irq_stat & (1 << i); - if (tmp && ap) { + if (ap) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->active_tag); - if (ahci_host_intr(ap, qc)) - irq_ack |= (1 << i); + if (!ahci_host_intr(ap, qc)) + if (ata_ratelimit()) { + struct pci_dev *pdev = + to_pci_dev(ap->host_set->dev); + printk(KERN_WARNING + "ahci(%s): unhandled interrupt on port %u\n", + pci_name(pdev), i); + } + + VPRINTK("port %u\n", i); + } else { + VPRINTK("port %u (no irq)\n", i); + if (ata_ratelimit()) { + struct pci_dev *pdev = + to_pci_dev(ap->host_set->dev); + printk(KERN_WARNING + "ahci(%s): interrupt on disabled port %u\n", + pci_name(pdev), i); + } } + + irq_ack |= (1 << i); } if (irq_ack) { diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index f0894bfa908b..ceffaef37d17 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -48,6 +48,7 @@ #include #include #include +#include #include #include "scsi.h" #include "scsi_priv.h" @@ -4688,6 +4689,27 @@ static void __exit ata_exit(void) module_init(ata_init); module_exit(ata_exit); +static unsigned long ratelimit_time; +static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; + +int ata_ratelimit(void) +{ + int rc; + unsigned long flags; + + spin_lock_irqsave(&ata_ratelimit_lock, flags); + + if (time_after(jiffies, ratelimit_time)) { + rc = 1; + ratelimit_time = jiffies + (HZ/5); + } else + rc = 0; + + spin_unlock_irqrestore(&ata_ratelimit_lock, flags); + + return rc; +} + /* * libata is essentially a library of internal helper functions for * low-level ATA host controller drivers. As such, the API/ABI is @@ -4729,6 +4751,7 @@ EXPORT_SYMBOL_GPL(sata_phy_reset); EXPORT_SYMBOL_GPL(__sata_phy_reset); EXPORT_SYMBOL_GPL(ata_bus_reset); EXPORT_SYMBOL_GPL(ata_port_disable); +EXPORT_SYMBOL_GPL(ata_ratelimit); EXPORT_SYMBOL_GPL(ata_scsi_ioctl); EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); EXPORT_SYMBOL_GPL(ata_scsi_error); diff --git a/include/linux/libata.h b/include/linux/libata.h index 4d45179872cc..7929cfc9318d 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -410,6 +410,8 @@ extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmn extern int ata_scsi_error(struct Scsi_Host *host); extern int ata_scsi_release(struct Scsi_Host *host); extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); +extern int ata_ratelimit(void); + /* * Default driver ops implementations */ From a15dbeb4772626a015337dea06da67095aec3862 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Wed, 5 Oct 2005 15:02:14 -0400 Subject: [PATCH 26/59] libata: ATAPI command completion tweaks and notes 1) note urgent bug, that completes command twice 2) only fix up INQUIRY data if the SCSI version is zero (typically indicates ATAPI MMC-ish device) 3) if there is a problem on the ATA bus, don't bother with REQUEST SENSE, just directly handle the error based on Status/Error registers. --- drivers/scsi/libata-scsi.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 45ebe9fd52ea..1a1ef3429e55 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -1483,9 +1483,18 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) { struct scsi_cmnd *cmd = qc->scsicmd; - if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) { + if (unlikely(drv_stat & (ATA_BUSY | ATA_DRQ))) + ata_to_sense_error(qc, drv_stat); + else if (unlikely(drv_stat & ATA_ERR)) { DPRINTK("request check condition\n"); + /* FIXME: command completion with check condition + * but no sense causes the error handler to run, + * which then issues REQUEST SENSE, fills in the sense + * buffer, and completes the command (for the second + * time). We need to issue REQUEST SENSE some other + * way, to avoid completing the command twice. + */ cmd->result = SAM_STAT_CHECK_CONDITION; qc->scsidone(cmd); @@ -1499,10 +1508,26 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) unsigned int buflen; buflen = ata_scsi_rbuf_get(cmd, &buf); - buf[2] = 0x5; - buf[3] = (buf[3] & 0xf0) | 2; + + /* ATAPI devices typically report zero for their SCSI version, + * and sometimes deviate from the spec WRT response data + * format. If SCSI version is reported as zero like normal, + * then we make the following fixups: 1) Fake MMC-5 version, + * to indicate to the Linux scsi midlayer this is a modern + * device. 2) Ensure response data format / ATAPI information + * are always correct. + */ + /* FIXME: do we ever override EVPD pages and the like, with + * this code? + */ + if (buf[2] == 0) { + buf[2] = 0x5; + buf[3] = 0x32; + } + ata_scsi_rbuf_put(cmd, buf); } + cmd->result = SAM_STAT_GOOD; } From a939c9631527053aa38aa8795a6f7203c7f20b69 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Wed, 5 Oct 2005 17:09:16 -0400 Subject: [PATCH 27/59] libata: move atapi_request_sense() to libata-scsi module No content changes, just moving code around. --- drivers/scsi/libata-core.c | 49 +------------------------------------- drivers/scsi/libata-scsi.c | 46 +++++++++++++++++++++++++++++++++++ drivers/scsi/libata.h | 3 +++ 3 files changed, 50 insertions(+), 48 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index ceffaef37d17..f731bbdd4236 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -71,7 +71,6 @@ static int fgb(u32 bitmap); static int ata_choose_xfer_mode(struct ata_port *ap, u8 *xfer_mode_out, unsigned int *xfer_shift_out); -static int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat); static void __ata_qc_complete(struct ata_queued_cmd *qc); static unsigned int ata_unique_id = 1; @@ -3015,52 +3014,6 @@ fsm_start: goto fsm_start; } -static void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, - struct scsi_cmnd *cmd) -{ - DECLARE_COMPLETION(wait); - struct ata_queued_cmd *qc; - unsigned long flags; - int rc; - - DPRINTK("ATAPI request sense\n"); - - qc = ata_qc_new_init(ap, dev); - BUG_ON(qc == NULL); - - /* FIXME: is this needed? */ - memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); - - ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); - qc->dma_dir = DMA_FROM_DEVICE; - - memset(&qc->cdb, 0, ap->cdb_len); - qc->cdb[0] = REQUEST_SENSE; - qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; - - qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; - qc->tf.command = ATA_CMD_PACKET; - - qc->tf.protocol = ATA_PROT_ATAPI; - qc->tf.lbam = (8 * 1024) & 0xff; - qc->tf.lbah = (8 * 1024) >> 8; - qc->nbytes = SCSI_SENSE_BUFFERSIZE; - - qc->waiting = &wait; - qc->complete_fn = ata_qc_complete_noop; - - spin_lock_irqsave(&ap->host_set->lock, flags); - rc = ata_qc_issue(qc); - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - if (rc) - ata_port_disable(ap); - else - wait_for_completion(&wait); - - DPRINTK("EXIT\n"); -} - /** * ata_qc_timeout - Handle timeout of queued command * @qc: Command that timed out @@ -3254,7 +3207,7 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, return qc; } -static int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat) +int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat) { return 0; } diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 1a1ef3429e55..c58a7a19780f 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -1479,6 +1479,52 @@ void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 done(cmd); } +void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, + struct scsi_cmnd *cmd) +{ + DECLARE_COMPLETION(wait); + struct ata_queued_cmd *qc; + unsigned long flags; + int rc; + + DPRINTK("ATAPI request sense\n"); + + qc = ata_qc_new_init(ap, dev); + BUG_ON(qc == NULL); + + /* FIXME: is this needed? */ + memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); + + ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); + qc->dma_dir = DMA_FROM_DEVICE; + + memset(&qc->cdb, 0, ap->cdb_len); + qc->cdb[0] = REQUEST_SENSE; + qc->cdb[4] = SCSI_SENSE_BUFFERSIZE; + + qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + qc->tf.command = ATA_CMD_PACKET; + + qc->tf.protocol = ATA_PROT_ATAPI; + qc->tf.lbam = (8 * 1024) & 0xff; + qc->tf.lbah = (8 * 1024) >> 8; + qc->nbytes = SCSI_SENSE_BUFFERSIZE; + + qc->waiting = &wait; + qc->complete_fn = ata_qc_complete_noop; + + spin_lock_irqsave(&ap->host_set->lock, flags); + rc = ata_qc_issue(qc); + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + if (rc) + ata_port_disable(ap); + else + wait_for_completion(&wait); + + DPRINTK("EXIT\n"); +} + static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) { struct scsi_cmnd *cmd = qc->scsicmd; diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h index c7a1fa1c9abc..a4b55dc9c698 100644 --- a/drivers/scsi/libata.h +++ b/drivers/scsi/libata.h @@ -39,6 +39,7 @@ struct ata_scsi_args { /* libata-core.c */ extern int atapi_enabled; +extern int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat); extern struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, struct ata_device *dev); extern void ata_qc_free(struct ata_queued_cmd *qc); @@ -51,6 +52,8 @@ extern void swap_buf_le16(u16 *buf, unsigned int buf_words); /* libata-scsi.c */ +extern void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, + struct scsi_cmnd *cmd); extern void ata_scsi_scan_host(struct ata_port *ap); extern void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat); extern int ata_scsi_error(struct Scsi_Host *host); From afb0edd922c7ed6e73678730921dfcccebec17e8 Mon Sep 17 00:00:00 2001 From: Brett Russ Date: Wed, 5 Oct 2005 17:08:42 -0400 Subject: [PATCH 28/59] [PATCH] libata: Marvell spinlock fixes and simplification This should fix up lockups that people were seeing due to improper spinlock placement. Also, the start/stop DMA routines put guarded trust in the cached state of DMA. Signed-off-by: Brett Russ Signed-off-by: Jeff Garzik --- drivers/scsi/sata_mv.c | 58 +++++++++++++++++------------------------- 1 file changed, 24 insertions(+), 34 deletions(-) diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index ecda7df21142..c3084f8b3ee7 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -35,7 +35,7 @@ #include #define DRV_NAME "sata_mv" -#define DRV_VERSION "0.22" +#define DRV_VERSION "0.23" enum { /* BAR's are enumerated in terms of pci_resource_start() terms */ @@ -406,40 +406,30 @@ static void mv_irq_clear(struct ata_port *ap) { } -static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp, - struct ata_port *ap) +static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp) { - unsigned long flags; - - spin_lock_irqsave(&ap->host_set->lock, flags); - - writelfl(EDMA_EN, base + EDMA_CMD_OFS); - pp->pp_flags |= MV_PP_FLAG_EDMA_EN; - - spin_unlock_irqrestore(&ap->host_set->lock, flags); + if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) { + writelfl(EDMA_EN, base + EDMA_CMD_OFS); + pp->pp_flags |= MV_PP_FLAG_EDMA_EN; + } + assert(EDMA_EN & readl(base + EDMA_CMD_OFS)); } static void mv_stop_dma(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); struct mv_port_priv *pp = ap->private_data; - unsigned long flags; u32 reg; int i; - spin_lock_irqsave(&ap->host_set->lock, flags); - - if (!(MV_PP_FLAG_EDMA_DS_ACT & pp->pp_flags) && - ((MV_PP_FLAG_EDMA_EN & pp->pp_flags) || - (EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)))) { - /* Disable EDMA if we're not already trying to disable it - * and it is currently active. The disable bit auto clears. + if (MV_PP_FLAG_EDMA_EN & pp->pp_flags) { + /* Disable EDMA if active. The disable bit auto clears. */ - pp->pp_flags |= MV_PP_FLAG_EDMA_DS_ACT; writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS); pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; - } - spin_unlock_irqrestore(&ap->host_set->lock, flags); + } else { + assert(!(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS))); + } /* now properly wait for the eDMA to stop */ for (i = 1000; i > 0; i--) { @@ -450,12 +440,9 @@ static void mv_stop_dma(struct ata_port *ap) udelay(100); } - spin_lock_irqsave(&ap->host_set->lock, flags); - pp->pp_flags &= ~MV_PP_FLAG_EDMA_DS_ACT; - spin_unlock_irqrestore(&ap->host_set->lock, flags); - if (EDMA_EN & reg) { printk(KERN_ERR "ata%u: Unable to stop eDMA\n", ap->id); + /* FIXME: Consider doing a reset here to recover */ } } @@ -716,8 +703,11 @@ static void mv_port_stop(struct ata_port *ap) { struct device *dev = ap->host_set->dev; struct mv_port_priv *pp = ap->private_data; + unsigned long flags; + spin_lock_irqsave(&ap->host_set->lock, flags); mv_stop_dma(ap); + spin_unlock_irqrestore(&ap->host_set->lock, flags); ap->private_data = NULL; dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma); @@ -867,11 +857,7 @@ static int mv_qc_issue(struct ata_queued_cmd *qc) mv_inc_q_index(&pp->req_producer); /* now incr producer index */ - if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) { - /* turn on EDMA if not already on */ - mv_start_dma(port_mmio, pp, qc->ap); - } - assert(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)); + mv_start_dma(port_mmio, pp); /* and write the request in pointer to kick the EDMA to life */ in_ptr &= EDMA_REQ_Q_BASE_LO_MASK; @@ -921,8 +907,12 @@ static void mv_err_intr(struct ata_port *ap) serr = scr_read(ap, SCR_ERROR); scr_write_flush(ap, SCR_ERROR, serr); } - DPRINTK("port %u error; EDMA err cause: 0x%08x SERR: 0x%08x\n", - ap->port_no, edma_err_cause, serr); + if (EDMA_ERR_SELF_DIS & edma_err_cause) { + struct mv_port_priv *pp = ap->private_data; + pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN; + } + DPRINTK(KERN_ERR "ata%u: port error; EDMA err cause: 0x%08x " + "SERR: 0x%08x\n", ap->id, edma_err_cause, serr); /* Clear EDMA now that SERR cleanup done */ writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS); @@ -1034,7 +1024,7 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance, printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n", readl(mmio + PCI_IRQ_CAUSE_OFS)); - VPRINTK("All regs @ PCI error\n"); + DPRINTK("All regs @ PCI error\n"); mv_dump_all_regs(mmio, -1, to_pci_dev(host_set->dev)); writelfl(0, mmio + PCI_IRQ_CAUSE_OFS); From 05b308e1df6d9d673daedb517969241f41278b52 Mon Sep 17 00:00:00 2001 From: Brett Russ Date: Wed, 5 Oct 2005 17:08:53 -0400 Subject: [PATCH 29/59] [PATCH] libata: Marvell function headers adds helpful function header comments. Signed-off-by: Brett Russ Signed-off-by: Jeff Garzik --- drivers/scsi/sata_mv.c | 225 +++++++++++++++++++++++++++++++++++++++-- 1 file changed, 219 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index c3084f8b3ee7..84b488f81c75 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -35,7 +35,7 @@ #include #define DRV_NAME "sata_mv" -#define DRV_VERSION "0.23" +#define DRV_VERSION "0.24" enum { /* BAR's are enumerated in terms of pci_resource_start() terms */ @@ -406,6 +406,17 @@ static void mv_irq_clear(struct ata_port *ap) { } +/** + * mv_start_dma - Enable eDMA engine + * @base: port base address + * @pp: port private data + * + * Verify the local cache of the eDMA state is accurate with an + * assert. + * + * LOCKING: + * Inherited from caller. + */ static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp) { if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) { @@ -415,6 +426,16 @@ static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp) assert(EDMA_EN & readl(base + EDMA_CMD_OFS)); } +/** + * mv_stop_dma - Disable eDMA engine + * @ap: ATA channel to manipulate + * + * Verify the local cache of the eDMA state is accurate with an + * assert. + * + * LOCKING: + * Inherited from caller. + */ static void mv_stop_dma(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); @@ -561,7 +582,15 @@ static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val) } } -/* This routine only applies to 6xxx parts */ +/** + * mv_global_soft_reset - Perform the 6xxx global soft reset + * @mmio_base: base address of the HBA + * + * This routine only applies to 6xxx parts. + * + * LOCKING: + * Inherited from caller. + */ static int mv_global_soft_reset(void __iomem *mmio_base) { void __iomem *reg = mmio_base + PCI_MAIN_CMD_STS_OFS; @@ -617,6 +646,16 @@ done: return rc; } +/** + * mv_host_stop - Host specific cleanup/stop routine. + * @host_set: host data structure + * + * Disable ints, cleanup host memory, call general purpose + * host_stop. + * + * LOCKING: + * Inherited from caller. + */ static void mv_host_stop(struct ata_host_set *host_set) { struct mv_host_priv *hpriv = host_set->private_data; @@ -631,6 +670,16 @@ static void mv_host_stop(struct ata_host_set *host_set) ata_host_stop(host_set); } +/** + * mv_port_start - Port specific init/start routine. + * @ap: ATA channel to manipulate + * + * Allocate and point to DMA memory, init port private memory, + * zero indices. + * + * LOCKING: + * Inherited from caller. + */ static int mv_port_start(struct ata_port *ap) { struct device *dev = ap->host_set->dev; @@ -699,6 +748,15 @@ static int mv_port_start(struct ata_port *ap) return 0; } +/** + * mv_port_stop - Port specific cleanup/stop routine. + * @ap: ATA channel to manipulate + * + * Stop DMA, cleanup port memory. + * + * LOCKING: + * This routine uses the host_set lock to protect the DMA stop. + */ static void mv_port_stop(struct ata_port *ap) { struct device *dev = ap->host_set->dev; @@ -714,6 +772,15 @@ static void mv_port_stop(struct ata_port *ap) kfree(pp); } +/** + * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries + * @qc: queued command whose SG list to source from + * + * Populate the SG list and mark the last entry. + * + * LOCKING: + * Inherited from caller. + */ static void mv_fill_sg(struct ata_queued_cmd *qc) { struct mv_port_priv *pp = qc->ap->private_data; @@ -748,6 +815,18 @@ static inline void mv_crqb_pack_cmd(u16 *cmdw, u8 data, u8 addr, unsigned last) (last ? CRQB_CMD_LAST : 0); } +/** + * mv_qc_prep - Host specific command preparation. + * @qc: queued command to prepare + * + * This routine simply redirects to the general purpose routine + * if command is not DMA. Else, it handles prep of the CRQB + * (command request block), does some sanity checking, and calls + * the SG load routine. + * + * LOCKING: + * Inherited from caller. + */ static void mv_qc_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; @@ -830,6 +909,18 @@ static void mv_qc_prep(struct ata_queued_cmd *qc) mv_fill_sg(qc); } +/** + * mv_qc_issue - Initiate a command to the host + * @qc: queued command to start + * + * This routine simply redirects to the general purpose routine + * if command is not DMA. Else, it sanity checks our local + * caches of the request producer/consumer indices then enables + * DMA and bumps the request producer index. + * + * LOCKING: + * Inherited from caller. + */ static int mv_qc_issue(struct ata_queued_cmd *qc) { void __iomem *port_mmio = mv_ap_base(qc->ap); @@ -867,6 +958,19 @@ static int mv_qc_issue(struct ata_queued_cmd *qc) return 0; } +/** + * mv_get_crpb_status - get status from most recently completed cmd + * @ap: ATA channel to manipulate + * + * This routine is for use when the port is in DMA mode, when it + * will be using the CRPB (command response block) method of + * returning command completion information. We assert indices + * are good, grab status, and bump the response consumer index to + * prove that we're up to date. + * + * LOCKING: + * Inherited from caller. + */ static u8 mv_get_crpb_status(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); @@ -896,6 +1000,19 @@ static u8 mv_get_crpb_status(struct ata_port *ap) return (pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT); } +/** + * mv_err_intr - Handle error interrupts on the port + * @ap: ATA channel to manipulate + * + * In most cases, just clear the interrupt and move on. However, + * some cases require an eDMA reset, which is done right before + * the COMRESET in mv_phy_reset(). The SERR case requires a + * clear of pending errors in the SATA SERROR register. Finally, + * if the port disabled DMA, update our cached copy to match. + * + * LOCKING: + * Inherited from caller. + */ static void mv_err_intr(struct ata_port *ap) { void __iomem *port_mmio = mv_ap_base(ap); @@ -923,7 +1040,22 @@ static void mv_err_intr(struct ata_port *ap) } } -/* Handle any outstanding interrupts in a single SATAHC */ +/** + * mv_host_intr - Handle all interrupts on the given host controller + * @host_set: host specific structure + * @relevant: port error bits relevant to this host controller + * @hc: which host controller we're to look at + * + * Read then write clear the HC interrupt status then walk each + * port connected to the HC and see if it needs servicing. Port + * success ints are reported in the HC interrupt status reg, the + * port error ints are reported in the higher level main + * interrupt status register and thus are passed in via the + * 'relevant' argument. + * + * LOCKING: + * Inherited from caller. + */ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, unsigned int hc) { @@ -993,6 +1125,21 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant, VPRINTK("EXIT\n"); } +/** + * mv_interrupt - + * @irq: unused + * @dev_instance: private data; in this case the host structure + * @regs: unused + * + * Read the read only register to determine if any host + * controllers have pending interrupts. If so, call lower level + * routine to handle. Also check for PCI errors which are only + * reported here. + * + * LOCKING: + * This routine holds the host_set lock while processing pending + * interrupts. + */ static irqreturn_t mv_interrupt(int irq, void *dev_instance, struct pt_regs *regs) { @@ -1035,14 +1182,32 @@ static irqreturn_t mv_interrupt(int irq, void *dev_instance, return IRQ_RETVAL(handled); } +/** + * mv_check_err - Return the error shadow register to caller. + * @ap: ATA channel to manipulate + * + * Marvell requires DMA to be stopped before accessing shadow + * registers. So we do that, then return the needed register. + * + * LOCKING: + * Inherited from caller. FIXME: protect mv_stop_dma with lock? + */ static u8 mv_check_err(struct ata_port *ap) { mv_stop_dma(ap); /* can't read shadow regs if DMA on */ return readb((void __iomem *) ap->ioaddr.error_addr); } -/* Part of this is taken from __sata_phy_reset and modified to not sleep - * since this routine gets called from interrupt level. +/** + * mv_phy_reset - Perform eDMA reset followed by COMRESET + * @ap: ATA channel to manipulate + * + * Part of this is taken from __sata_phy_reset and modified to + * not sleep since this routine gets called from interrupt level. + * + * LOCKING: + * Inherited from caller. This is coded to safe to call at + * interrupt level, i.e. it does not sleep. */ static void mv_phy_reset(struct ata_port *ap) { @@ -1105,6 +1270,16 @@ static void mv_phy_reset(struct ata_port *ap) VPRINTK("EXIT\n"); } +/** + * mv_eng_timeout - Routine called by libata when SCSI times out I/O + * @ap: ATA channel to manipulate + * + * Intent is to clear all pending error conditions, reset the + * chip/bus, fail the command, and move on. + * + * LOCKING: + * This routine holds the host_set lock while failing the command. + */ static void mv_eng_timeout(struct ata_port *ap) { struct ata_queued_cmd *qc; @@ -1140,6 +1315,18 @@ static void mv_eng_timeout(struct ata_port *ap) } } +/** + * mv_port_init - Perform some early initialization on a single port. + * @port: libata data structure storing shadow register addresses + * @port_mmio: base address of the port + * + * Initialize shadow register mmio addresses, clear outstanding + * interrupts on the port, and unmask interrupts for the future + * start of the port. + * + * LOCKING: + * Inherited from caller. + */ static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio) { unsigned long shd_base = (unsigned long) port_mmio + SHD_BLK_OFS; @@ -1177,6 +1364,16 @@ static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio) readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS)); } +/** + * mv_host_init - Perform some early initialization of the host. + * @probe_ent: early data struct representing the host + * + * If possible, do an early global reset of the host. Then do + * our port init and clear/unmask all/relevant host interrupts. + * + * LOCKING: + * Inherited from caller. + */ static int mv_host_init(struct ata_probe_ent *probe_ent) { int rc = 0, n_hc, port, hc; @@ -1226,7 +1423,15 @@ done: return rc; } -/* FIXME: complete this */ +/** + * mv_print_info - Dump key info to kernel log for perusal. + * @probe_ent: early data struct representing the host + * + * FIXME: complete this. + * + * LOCKING: + * Inherited from caller. + */ static void mv_print_info(struct ata_probe_ent *probe_ent) { struct pci_dev *pdev = to_pci_dev(probe_ent->dev); @@ -1253,6 +1458,14 @@ static void mv_print_info(struct ata_probe_ent *probe_ent) scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx"); } +/** + * mv_init_one - handle a positive probe of a Marvell host + * @pdev: PCI device found + * @ent: PCI device ID entry for the matched host + * + * LOCKING: + * Inherited from caller. + */ static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version = 0; From 8a70f8dc08dd40b7f8ac77280eaa99a8c6bc46f4 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Wed, 5 Oct 2005 17:19:47 -0400 Subject: [PATCH 30/59] [libata sata_mv] fix warning shuffle ifdef location to fix the following warning: drivers/scsi/sata_mv.c:471: warning: 'mv_dump_mem' defined but not used --- drivers/scsi/sata_mv.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index 84b488f81c75..d457f5673476 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -467,9 +467,9 @@ static void mv_stop_dma(struct ata_port *ap) } } +#ifdef ATA_DEBUG static void mv_dump_mem(void __iomem *start, unsigned bytes) { -#ifdef ATA_DEBUG int b, w; for (b = 0; b < bytes; ) { DPRINTK("%p: ", start + b); @@ -479,8 +479,9 @@ static void mv_dump_mem(void __iomem *start, unsigned bytes) } printk("\n"); } -#endif } +#endif + static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes) { #ifdef ATA_DEBUG From e12669e774be403c84baa651306d305752a35cd8 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Wed, 5 Oct 2005 18:39:23 -0400 Subject: [PATCH 31/59] libata: minor cleanups A few code shuffles, to make merging future code easier. Add (DRIVER_SENSE << 24) to certain result codes, as noted by Douglas Gilbert. --- drivers/scsi/libata-core.c | 6 +++--- drivers/scsi/libata-scsi.c | 12 ++++++++---- 2 files changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index f731bbdd4236..d568914c4344 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -3131,14 +3131,14 @@ void ata_eng_timeout(struct ata_port *ap) DPRINTK("ENTER\n"); qc = ata_qc_from_tag(ap, ap->active_tag); - if (!qc) { + if (qc) + ata_qc_timeout(qc); + else { printk(KERN_ERR "ata%u: BUG: timeout without command\n", ap->id); goto out; } - ata_qc_timeout(qc); - out: DPRINTK("EXIT\n"); } diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index c58a7a19780f..1c3a10fb3c44 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -225,7 +225,7 @@ void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) }; int i = 0; - cmd->result = SAM_STAT_CHECK_CONDITION; + cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; /* * Is this an error we can process/parse @@ -1468,7 +1468,7 @@ unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) { DPRINTK("ENTER\n"); - cmd->result = SAM_STAT_CHECK_CONDITION; + cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; cmd->sense_buffer[0] = 0x70; cmd->sense_buffer[2] = ILLEGAL_REQUEST; @@ -1529,8 +1529,11 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) { struct scsi_cmnd *cmd = qc->scsicmd; + VPRINTK("ENTER, drv_stat == 0x%x\n", drv_stat); + if (unlikely(drv_stat & (ATA_BUSY | ATA_DRQ))) ata_to_sense_error(qc, drv_stat); + else if (unlikely(drv_stat & ATA_ERR)) { DPRINTK("request check condition\n"); @@ -1546,7 +1549,9 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) qc->scsidone(cmd); return 1; - } else { + } + + else { u8 *scsicmd = cmd->cmnd; if (scsicmd[0] == INQUIRY) { @@ -1578,7 +1583,6 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) } qc->scsidone(cmd); - return 0; } /** From ad6e90f6d0c4243cc35e07e2681a3323af533ce4 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 6 Oct 2005 11:43:29 +0900 Subject: [PATCH 32/59] [PATCH] sil24: ignore non-error exception irqs 01_sil24_ignore-non-error-exception-irqs.patch Do not error-finish commands for non-error exception irqs - just ignore them. This is taken from Edward's driver. Signed-off-by: Tejun Heo sata_sil24.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index d8a2f5f04e82..571302dc48a3 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -489,12 +489,21 @@ static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) u32 irq_stat, cmd_err, sstatus, serror; irq_stat = readl(port + PORT_IRQ_STAT); + writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */ + + if (!(irq_stat & PORT_IRQ_ERROR)) { + /* ignore non-completion, non-error irqs for now */ + printk(KERN_WARNING DRV_NAME + "ata%u: non-error exception irq (irq_stat %x)\n", + ap->id, irq_stat); + return; + } + cmd_err = readl(port + PORT_CMD_ERR); sstatus = readl(port + PORT_SSTATUS); serror = readl(port + PORT_SERROR); /* Clear IRQ/errors */ - writel(irq_stat, port + PORT_IRQ_STAT); if (cmd_err) writel(cmd_err, port + PORT_CMD_ERR); if (serror) From 46b93e7bce80a08ea07e250d03b0b596cbd32595 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 6 Oct 2005 11:43:34 +0900 Subject: [PATCH 33/59] [PATCH] sil24: remove CMDERR clearing 02_sil24_remove-cmderr-clearing.patch CMDERR register doesn't need clearing. This is from Edward's driver. Signed-off-by: Tejun Heo sata_sil24.c | 4 ---- 1 file changed, 4 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 571302dc48a3..032d9c093979 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -502,10 +502,6 @@ static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) cmd_err = readl(port + PORT_CMD_ERR); sstatus = readl(port + PORT_SSTATUS); serror = readl(port + PORT_SERROR); - - /* Clear IRQ/errors */ - if (cmd_err) - writel(cmd_err, port + PORT_CMD_ERR); if (serror) writel(serror, port + PORT_SERROR); From 6a575fa969beeddd0859f9e9d26ab16c6a0d8d6a Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 6 Oct 2005 11:43:39 +0900 Subject: [PATCH 34/59] [PATCH] sil24: implement proper TF register reading & caching 03_sil24_add-tf-reading.patch This patch implements proper TF register reading back and caching and bumps up version to 0.22. This is taken from Edward's driver. Signed-off-by: Tejun Heo sata_sil24.c | 50 +++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 45 insertions(+), 5 deletions(-) Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 50 +++++++++++++++++++++++++++++++++++---- 1 file changed, 45 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 032d9c093979..b65194c755f8 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -41,7 +41,7 @@ #include #define DRV_NAME "sata_sil24" -#define DRV_VERSION "0.21" /* Silicon Image's preview driver was 0.10 */ +#define DRV_VERSION "0.22" /* Silicon Image's preview driver was 0.10 */ #define NR_PORTS 4 @@ -216,6 +216,7 @@ struct sil24_cmd_block { struct sil24_port_priv { struct sil24_cmd_block *cmd_block; /* 32 cmd blocks */ dma_addr_t cmd_block_dma; /* DMA base addr for them */ + struct ata_taskfile tf; /* Cached taskfile registers */ }; /* ap->host_set->private_data */ @@ -322,14 +323,25 @@ static struct ata_port_info sil24_port_info[] = { }, }; +static inline void sil24_update_tf(struct ata_port *ap) +{ + struct sil24_port_priv *pp = ap->private_data; + void *port = (void *)ap->ioaddr.cmd_addr; + struct sil24_prb *prb = port; + + ata_tf_from_fis(prb->fis, &pp->tf); +} + static u8 sil24_check_status(struct ata_port *ap) { - return ATA_DRDY; + struct sil24_port_priv *pp = ap->private_data; + return pp->tf.command; } static u8 sil24_check_err(struct ata_port *ap) { - return 0; + struct sil24_port_priv *pp = ap->private_data; + return pp->tf.feature; } static int sil24_scr_map[] = { @@ -485,6 +497,7 @@ static void sil24_eng_timeout(struct ata_port *ap) static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) { struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag); + struct sil24_port_priv *pp = ap->private_data; void *port = (void *)ap->ioaddr.cmd_addr; u32 irq_stat, cmd_err, sstatus, serror; @@ -509,8 +522,22 @@ static void sil24_error_intr(struct ata_port *ap, u32 slot_stat) " stat=0x%x irq=0x%x cmd_err=%d sstatus=0x%x serror=0x%x\n", ap->id, ap->port_no, slot_stat, irq_stat, cmd_err, sstatus, serror); + if (cmd_err == PORT_CERR_DEV || cmd_err == PORT_CERR_SDB) { + /* + * Device is reporting error, tf registers are valid. + */ + sil24_update_tf(ap); + } else { + /* + * Other errors. libata currently doesn't have any + * mechanism to report these errors. Just turn on + * ATA_ERR. + */ + pp->tf.command = ATA_ERR; + } + if (qc) - ata_qc_complete(qc, ATA_ERR); + ata_qc_complete(qc, pp->tf.command); sil24_reset_controller(ap); } @@ -523,8 +550,19 @@ static inline void sil24_host_intr(struct ata_port *ap) slot_stat = readl(port + PORT_SLOT_STAT); if (!(slot_stat & HOST_SSTAT_ATTN)) { + struct sil24_port_priv *pp = ap->private_data; + /* + * !HOST_SSAT_ATTN guarantees successful completion, + * so reading back tf registers is unnecessary for + * most commands. TODO: read tf registers for + * commands which require these values on successful + * completion (EXECUTE DEVICE DIAGNOSTIC, CHECK POWER, + * DEVICE RESET and READ PORT MULTIPLIER (any more?). + */ + sil24_update_tf(ap); + if (qc) - ata_qc_complete(qc, 0); + ata_qc_complete(qc, pp->tf.command); } else sil24_error_intr(ap, slot_stat); } @@ -579,6 +617,8 @@ static int sil24_port_start(struct ata_port *ap) return -ENOMEM; memset(pp, 0, sizeof(*pp)); + pp->tf.command = ATA_DRDY; + cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL); if (!cb) { kfree(pp); From 7f726d125d570f38b9e7c8a2decebc39c0a343dc Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 7 Oct 2005 01:43:19 +0900 Subject: [PATCH 35/59] [PATCH] sil24: implement tf_read callback Hello, guys. This patch implements ->tf_read callback for sil24. It didn't use to be necessary but new ata_gen_fixed_sense now makes use of ->tf_read callback. This patch is taken from Edward Falk's driver. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil24.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index b65194c755f8..693330bdc821 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -229,6 +229,7 @@ static u8 sil24_check_status(struct ata_port *ap); static u8 sil24_check_err(struct ata_port *ap); static u32 sil24_scr_read(struct ata_port *ap, unsigned sc_reg); static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val); +static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf); static void sil24_phy_reset(struct ata_port *ap); static void sil24_qc_prep(struct ata_queued_cmd *qc); static int sil24_qc_issue(struct ata_queued_cmd *qc); @@ -280,6 +281,8 @@ static struct ata_port_operations sil24_ops = { .check_err = sil24_check_err, .dev_select = ata_noop_dev_select, + .tf_read = sil24_tf_read, + .phy_reset = sil24_phy_reset, .qc_prep = sil24_qc_prep, @@ -372,6 +375,12 @@ static void sil24_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val) } } +static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf) +{ + struct sil24_port_priv *pp = ap->private_data; + *tf = pp->tf; +} + static void sil24_phy_reset(struct ata_port *ap) { __sata_phy_reset(ap); From 845c5834d0aa60eb1588397696e7fabbaab2d3b0 Mon Sep 17 00:00:00 2001 From: Douglas Gilbert Date: Sun, 9 Oct 2005 08:55:41 -0400 Subject: [PATCH 36/59] [libata scsi] add ata_scsi_set_sense helper - add extern ata_scsi_set_sense() to build SCSI fixed sense data and corresponding SCSI status Signed-off-by: Douglas Gilbert Signed-off-by: Jeff Garzik --- drivers/scsi/libata-scsi.c | 28 ++++++++++++++++++++++++++++ drivers/scsi/libata.h | 2 ++ 2 files changed, 30 insertions(+) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 1c3a10fb3c44..bca9a5016b17 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -1450,6 +1450,34 @@ unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, return 0; } +/** + * ata_scsi_set_sense - Set SCSI sense data and status + * @cmd: SCSI request to be handled + * @sk: SCSI-defined sense key + * @asc: SCSI-defined additional sense code + * @ascq: SCSI-defined additional sense code qualifier + * + * Helper function that builds a valid fixed format, current + * response code and the given sense key (sk), additional sense + * code (asc) and additional sense code qualifier (ascq) with + * a SCSI command status of %SAM_STAT_CHECK_CONDITION and + * DRIVER_SENSE set in the upper bits of scsi_cmnd::result . + * + * LOCKING: + * Not required + */ + +void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) +{ + cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; + + cmd->sense_buffer[0] = 0x70; /* fixed format, current */ + cmd->sense_buffer[2] = sk; + cmd->sense_buffer[7] = 18 - 8; /* additional sense length */ + cmd->sense_buffer[12] = asc; + cmd->sense_buffer[13] = ascq; +} + /** * ata_scsi_badcmd - End a SCSI request with an error * @cmd: SCSI request to be handled diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h index a4b55dc9c698..4622e643ffd3 100644 --- a/drivers/scsi/libata.h +++ b/drivers/scsi/libata.h @@ -80,6 +80,8 @@ extern unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf, extern void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq); +extern void ata_scsi_set_sense(struct scsi_cmnd *cmd, + u8 sk, u8 asc, u8 ascq); extern void ata_scsi_rbuf_fill(struct ata_scsi_args *args, unsigned int (*actor) (struct ata_scsi_args *args, u8 *rbuf, unsigned int buflen)); From ae00651020413bd7eb5fa3bd0abbd78d7cf1abb2 Mon Sep 17 00:00:00 2001 From: Douglas Gilbert Date: Sun, 9 Oct 2005 09:09:35 -0400 Subject: [PATCH 37/59] [libata scsi] improve scsi error handling with ata_scsi_set_sense() - change "xlat" and "fill" actors in libata-scsi so they are responsible for SCSI status and sense data when they return 1. This allows GOOD status or a specialized error to be set. - yield an error for mode sense requests for saved values [sat-r06] - remove static inlines for ata_bad_scsiop() and ata_bad_cdb() which are no longer used Signed-off-by: Douglas Gilbert Signed-off-by: Jeff Garzik --- drivers/scsi/libata-scsi.c | 184 ++++++++++++++++++++++++------------- drivers/scsi/libata.h | 10 -- 2 files changed, 121 insertions(+), 73 deletions(-) diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index bca9a5016b17..c64169ca7ff0 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -49,6 +49,14 @@ static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev); +static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, + void (*done)(struct scsi_cmnd *)) +{ + ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0); + /* "Invalid field in cbd" */ + done(cmd); +} + /** * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd. * @sdev: SCSI device for which BIOS geometry is to be determined @@ -182,7 +190,6 @@ void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) { struct scsi_cmnd *cmd = qc->scsicmd; u8 err = 0; - unsigned char *sb = cmd->sense_buffer; /* Based on the 3ware driver translation table */ static unsigned char sense_table[][4] = { /* BBD|ECC|ID|MAR */ @@ -225,8 +232,6 @@ void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) }; int i = 0; - cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - /* * Is this an error we can process/parse */ @@ -281,11 +286,9 @@ void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) /* Look for best matches first */ if((sense_table[i][0] & err) == sense_table[i][0]) { - sb[0] = 0x70; - sb[2] = sense_table[i][1]; - sb[7] = 0x0a; - sb[12] = sense_table[i][2]; - sb[13] = sense_table[i][3]; + ata_scsi_set_sense(cmd, sense_table[i][1] /* sk */, + sense_table[i][2] /* asc */, + sense_table[i][3] /* ascq */ ); return; } i++; @@ -300,11 +303,9 @@ void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) { if(stat_table[i][0] & drv_stat) { - sb[0] = 0x70; - sb[2] = stat_table[i][1]; - sb[7] = 0x0a; - sb[12] = stat_table[i][2]; - sb[13] = stat_table[i][3]; + ata_scsi_set_sense(cmd, sense_table[i][1] /* sk */, + sense_table[i][2] /* asc */, + sense_table[i][3] /* ascq */ ); return; } i++; @@ -313,15 +314,12 @@ void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) printk(KERN_ERR "ata%u: called with no error (%02X)!\n", qc->ap->id, drv_stat); /* additional-sense-code[-qualifier] */ - sb[0] = 0x70; - sb[2] = MEDIUM_ERROR; - sb[7] = 0x0A; if (cmd->sc_data_direction == DMA_FROM_DEVICE) { - sb[12] = 0x11; /* "unrecovered read error" */ - sb[13] = 0x04; + ata_scsi_set_sense(cmd, MEDIUM_ERROR, 0x11, 0x4); + /* "unrecovered read error" */ } else { - sb[12] = 0x0C; /* "write error - */ - sb[13] = 0x02; /* auto-reallocation failed" */ + ata_scsi_set_sense(cmd, MEDIUM_ERROR, 0xc, 0x2); + /* "write error - auto-reallocation failed" */ } } @@ -430,9 +428,9 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, ; /* ignore IMMED bit, violates sat-r05 */ } if (scsicmd[4] & 0x2) - return 1; /* LOEJ bit set not supported */ + goto invalid_fld; /* LOEJ bit set not supported */ if (((scsicmd[4] >> 4) & 0xf) != 0) - return 1; /* power conditions not supported */ + goto invalid_fld; /* power conditions not supported */ if (scsicmd[4] & 0x1) { tf->nsect = 1; /* 1 sector, lba=0 */ @@ -464,6 +462,11 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, */ return 0; + +invalid_fld: + ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); + /* "Invalid field in cbd" */ + return 1; } @@ -623,20 +626,20 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) else if (scsicmd[0] == VERIFY_16) scsi_16_lba_len(scsicmd, &block, &n_block); else - return 1; + goto invalid_fld; if (!n_block) - return 1; + goto nothing_to_do; if (block >= dev_sectors) - return 1; + goto out_of_range; if ((block + n_block) > dev_sectors) - return 1; + goto out_of_range; if (lba48) { if (n_block > (64 * 1024)) - return 1; + goto invalid_fld; } else { if (n_block > 256) - return 1; + goto invalid_fld; } if (lba) { @@ -679,7 +682,7 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) Head: 0-15 Sector: 1-255*/ if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) - return 1; + goto out_of_range; tf->command = ATA_CMD_VERIFY; tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ @@ -690,6 +693,20 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) } return 0; + +invalid_fld: + ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); + /* "Invalid field in cbd" */ + return 1; + +out_of_range: + ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); + /* "Logical Block Address out of range" */ + return 1; + +nothing_to_do: + qc->scsicmd->result = SAM_STAT_GOOD; + return 1; } /** @@ -754,7 +771,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) break; default: DPRINTK("no-byte command\n"); - return 1; + goto invalid_fld; } /* Check and compose ATA command */ @@ -764,13 +781,13 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) * However, for ATA R/W commands, sector count 0 means * 256 or 65536 sectors, not 0 sectors as in SCSI. */ - return 1; + goto nothing_to_do; if (lba) { if (lba48) { /* The request -may- be too large for LBA48. */ if ((block >> 48) || (n_block > 65536)) - return 1; + goto out_of_range; tf->hob_nsect = (n_block >> 8) & 0xff; @@ -782,7 +799,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) /* The request -may- be too large for LBA28. */ if ((block >> 28) || (n_block > 256)) - return 1; + goto out_of_range; tf->device |= (block >> 24) & 0xf; } @@ -801,7 +818,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) /* The request -may- be too large for CHS addressing. */ if ((block >> 28) || (n_block > 256)) - return 1; + goto out_of_range; /* Convert LBA to CHS */ track = (u32)block / dev->sectors; @@ -817,7 +834,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) Head: 0-15 Sector: 1-255*/ if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) - return 1; + goto out_of_range; qc->nsect = n_block; tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ @@ -828,6 +845,20 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) } return 0; + +invalid_fld: + ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0); + /* "Invalid field in cbd" */ + return 1; + +out_of_range: + ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0); + /* "Logical Block Address out of range" */ + return 1; + +nothing_to_do: + qc->scsicmd->result = SAM_STAT_GOOD; + return 1; } static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) @@ -859,6 +890,12 @@ static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) * This function sets up an ata_queued_cmd structure for the * SCSI command, and sends that ata_queued_cmd to the hardware. * + * The xlat_func argument (actor) returns 0 if ready to execute + * ATA command, else 1 to finish translation. If 1 is returned + * then cmd->result (and possibly cmd->sense_buffer) are assumed + * to be set reflecting an error condition or clean (early) + * termination. + * * LOCKING: * spin_lock_irqsave(host_set lock) */ @@ -875,7 +912,7 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, qc = ata_scsi_qc_new(ap, dev, cmd, done); if (!qc) - return; + goto err_mem; /* data is present; dma-map it */ if (cmd->sc_data_direction == DMA_FROM_DEVICE || @@ -883,7 +920,7 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, if (unlikely(cmd->request_bufflen < 1)) { printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", ap->id, dev->devno); - goto err_out; + goto err_did; } if (cmd->use_sg) @@ -898,19 +935,28 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, qc->complete_fn = ata_scsi_qc_complete; if (xlat_func(qc, scsicmd)) - goto err_out; + goto early_finish; /* select device, send command to hardware */ if (ata_qc_issue(qc)) - goto err_out; + goto err_did; VPRINTK("EXIT\n"); return; -err_out: +early_finish: + ata_qc_free(qc); + done(cmd); + DPRINTK("EXIT - early finish (good or error)\n"); + return; + +err_did: ata_qc_free(qc); - ata_bad_cdb(cmd, done); - DPRINTK("EXIT - badcmd\n"); +err_mem: + cmd->result = (DID_ERROR << 16); + done(cmd); + DPRINTK("EXIT - internal\n"); + return; } /** @@ -977,7 +1023,8 @@ static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf) * Mapping the response buffer, calling the command's handler, * and handling the handler's return value. This return value * indicates whether the handler wishes the SCSI command to be - * completed successfully, or not. + * completed successfully (0), or not (in which case cmd->result + * and sense buffer are assumed to be set). * * LOCKING: * spin_lock_irqsave(host_set lock) @@ -996,12 +1043,9 @@ void ata_scsi_rbuf_fill(struct ata_scsi_args *args, rc = actor(args, rbuf, buflen); ata_scsi_rbuf_put(cmd, rbuf); - if (rc) - ata_bad_cdb(cmd, args->done); - else { + if (rc == 0) cmd->result = SAM_STAT_GOOD; - args->done(cmd); - } + args->done(cmd); } /** @@ -1307,8 +1351,16 @@ unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, * in the same manner) */ page_control = scsicmd[2] >> 6; - if ((page_control != 0) && (page_control != 3)) - return 1; + switch (page_control) { + case 0: /* current */ + break; /* supported */ + case 3: /* saved */ + goto saving_not_supp; + case 1: /* changeable */ + case 2: /* defaults */ + default: + goto invalid_fld; + } if (six_byte) output_len = 4; @@ -1339,7 +1391,7 @@ unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, break; default: /* invalid page code */ - return 1; + goto invalid_fld; } if (six_byte) { @@ -1352,6 +1404,16 @@ unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf, } return 0; + +invalid_fld: + ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0); + /* "Invalid field in cbd" */ + return 1; + +saving_not_supp: + ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0); + /* "Saving parameters not supported" */ + return 1; } /** @@ -1496,13 +1558,7 @@ void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq) void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq) { DPRINTK("ENTER\n"); - cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - - cmd->sense_buffer[0] = 0x70; - cmd->sense_buffer[2] = ILLEGAL_REQUEST; - cmd->sense_buffer[7] = 14 - 8; /* addnl. sense len. FIXME: correct? */ - cmd->sense_buffer[12] = asc; - cmd->sense_buffer[13] = ascq; + ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq); done(cmd); } @@ -1871,7 +1927,7 @@ void ata_scsi_simulate(u16 *id, case INQUIRY: if (scsicmd[1] & 2) /* is CmdDt set? */ - ata_bad_cdb(cmd, done); + ata_scsi_invalid_field(cmd, done); else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */ ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std); else if (scsicmd[2] == 0x00) @@ -1881,7 +1937,7 @@ void ata_scsi_simulate(u16 *id, else if (scsicmd[2] == 0x83) ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83); else - ata_bad_cdb(cmd, done); + ata_scsi_invalid_field(cmd, done); break; case MODE_SENSE: @@ -1891,7 +1947,7 @@ void ata_scsi_simulate(u16 *id, case MODE_SELECT: /* unconditionally return */ case MODE_SELECT_10: /* bad-field-in-cdb */ - ata_bad_cdb(cmd, done); + ata_scsi_invalid_field(cmd, done); break; case READ_CAPACITY: @@ -1902,7 +1958,7 @@ void ata_scsi_simulate(u16 *id, if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16) ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap); else - ata_bad_cdb(cmd, done); + ata_scsi_invalid_field(cmd, done); break; case REPORT_LUNS: @@ -1914,7 +1970,9 @@ void ata_scsi_simulate(u16 *id, /* all other commands */ default: - ata_bad_scsiop(cmd, done); + ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0); + /* "Invalid command operation code" */ + done(cmd); break; } } diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h index 4622e643ffd3..a18f2ac1d4a1 100644 --- a/drivers/scsi/libata.h +++ b/drivers/scsi/libata.h @@ -86,14 +86,4 @@ extern void ata_scsi_rbuf_fill(struct ata_scsi_args *args, unsigned int (*actor) (struct ata_scsi_args *args, u8 *rbuf, unsigned int buflen)); -static inline void ata_bad_scsiop(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) -{ - ata_scsi_badcmd(cmd, done, 0x20, 0x00); -} - -static inline void ata_bad_cdb(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) -{ - ata_scsi_badcmd(cmd, done, 0x24, 0x00); -} - #endif /* __LIBATA_H__ */ From 1fcce839a541ffcd50da99a1bfdfea594be0e3d3 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 9 Oct 2005 09:31:33 -0400 Subject: [PATCH 38/59] [libata sata_sil24] nit pickings This patch removes unused NR_PORTS macro and adds termination entry to sil24_pci_tbl. Signed-off-by: Tejun Heo --- drivers/scsi/sata_sil24.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 693330bdc821..dffa13c84639 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -43,8 +43,6 @@ #define DRV_NAME "sata_sil24" #define DRV_VERSION "0.22" /* Silicon Image's preview driver was 0.10 */ -#define NR_PORTS 4 - /* * Port request block (PRB) 32 bytes */ @@ -244,6 +242,7 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) static struct pci_device_id sil24_pci_tbl[] = { { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 }, { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 }, + { } /* terminate list */ }; static struct pci_driver sil24_pci_driver = { From 042c21fd2c3aa553907020131caa553a9da24589 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 9 Oct 2005 09:35:46 -0400 Subject: [PATCH 39/59] [libata sata_sil24] add support for 3131/3531 This patch adds support for sil_3131 and sil_3531. Both are identical to 3124 except that they have only one port. Bits 30 and 31 of ata_port_info->host_flags is used to encode available port numbers. Version number is bumped to 0.22. Edward Falk supplied all the necessary information and preliminary patch. Signed-off-by: Tejun Heo --- drivers/scsi/sata_sil24.c | 38 ++++++++++++++++++++++++++++++-------- 1 file changed, 30 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index dffa13c84639..19857814d69f 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -196,6 +196,7 @@ enum { /* board id */ BID_SIL3124 = 0, BID_SIL3132 = 1, + BID_SIL3131 = 2, IRQ_STAT_4PORTS = 0xf, }; @@ -242,6 +243,8 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) static struct pci_device_id sil24_pci_tbl[] = { { 0x1095, 0x3124, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3124 }, { 0x1095, 0x3132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3132 }, + { 0x1095, 0x3131, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 }, + { 0x1095, 0x3531, PCI_ANY_ID, PCI_ANY_ID, 0, 0, BID_SIL3131 }, { } /* terminate list */ }; @@ -300,13 +303,20 @@ static struct ata_port_operations sil24_ops = { .host_stop = sil24_host_stop, }; +/* + * Use bits 30-31 of host_flags to encode available port numbers. + * Current maxium is 4. + */ +#define SIL24_NPORTS2FLAG(nports) ((((unsigned)(nports) - 1) & 0x3) << 30) +#define SIL24_FLAG2NPORTS(flag) ((((flag) >> 30) & 0x3) + 1) + static struct ata_port_info sil24_port_info[] = { /* sil_3124 */ { .sht = &sil24_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | - ATA_FLAG_PIO_DMA, + ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(4), .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ @@ -317,7 +327,18 @@ static struct ata_port_info sil24_port_info[] = { .sht = &sil24_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | - ATA_FLAG_PIO_DMA, + ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(2), + .pio_mask = 0x1f, /* pio0-4 */ + .mwdma_mask = 0x07, /* mwdma0-2 */ + .udma_mask = 0x3f, /* udma0-5 */ + .port_ops = &sil24_ops, + }, + /* sil_3131/sil_3531 */ + { + .sht = &sil24_sht, + .host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | + ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO | + ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(1), .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = 0x3f, /* udma0-5 */ @@ -665,6 +686,7 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version = 0; unsigned int board_id = (unsigned int)ent->driver_data; + struct ata_port_info *pinfo = &sil24_port_info[board_id]; struct ata_probe_ent *probe_ent = NULL; struct sil24_host_priv *hpriv = NULL; void *host_base = NULL, *port_base = NULL; @@ -705,12 +727,12 @@ static int sil24_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) probe_ent->dev = pci_dev_to_dev(pdev); INIT_LIST_HEAD(&probe_ent->node); - probe_ent->sht = sil24_port_info[board_id].sht; - probe_ent->host_flags = sil24_port_info[board_id].host_flags; - probe_ent->pio_mask = sil24_port_info[board_id].pio_mask; - probe_ent->udma_mask = sil24_port_info[board_id].udma_mask; - probe_ent->port_ops = sil24_port_info[board_id].port_ops; - probe_ent->n_ports = (board_id == BID_SIL3124) ? 4 : 2; + probe_ent->sht = pinfo->sht; + probe_ent->host_flags = pinfo->host_flags; + probe_ent->pio_mask = pinfo->pio_mask; + probe_ent->udma_mask = pinfo->udma_mask; + probe_ent->port_ops = pinfo->port_ops; + probe_ent->n_ports = SIL24_FLAG2NPORTS(pinfo->host_flags); probe_ent->irq = pdev->irq; probe_ent->irq_flags = SA_SHIRQ; From e710245bb0f980adfb1dfe850e43761a8117c6be Mon Sep 17 00:00:00 2001 From: Andy Currid Date: Fri, 7 Oct 2005 08:53:39 -0700 Subject: [PATCH 40/59] [PATCH] Fix sata_nv handling of NVIDIA MCP51/55 Patch to fix sata_nv handling of NVIDIA MCP51/55 Signed-off-by: Andy Currid Signed-off-by: Jeff Garzik --- drivers/scsi/sata_nv.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c index 749ff92d8c63..9fa2535dd937 100644 --- a/drivers/scsi/sata_nv.c +++ b/drivers/scsi/sata_nv.c @@ -29,6 +29,8 @@ * NV-specific details such as register offsets, SATA phy location, * hotplug info, etc. * + * 0.09 + * - Fixed bug introduced by 0.08's MCP51 and MCP55 support. * * 0.08 * - Added support for MCP51 and MCP55. @@ -132,9 +134,7 @@ enum nv_host_type GENERIC, NFORCE2, NFORCE3, - CK804, - MCP51, - MCP55 + CK804 }; static struct pci_device_id nv_pci_tbl[] = { @@ -153,13 +153,13 @@ static struct pci_device_id nv_pci_tbl[] = { { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_SATA2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CK804 }, { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, MCP51 }, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC }, { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SATA2, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, MCP51 }, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC }, { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, MCP55 }, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC }, { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SATA2, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, MCP55 }, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, GENERIC }, { PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE<<8, 0xffff00, GENERIC }, From edea3ab58f8edd5f72d31f891ab4f34382e97e3a Mon Sep 17 00:00:00 2001 From: Mark Lord Date: Mon, 10 Oct 2005 17:53:58 -0400 Subject: [PATCH 41/59] libata: add new driver pdc_adma for PDC ADMA ATA cards --- drivers/scsi/Kconfig | 14 +- drivers/scsi/Makefile | 1 + drivers/scsi/pdc_adma.c | 737 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 749 insertions(+), 3 deletions(-) create mode 100644 drivers/scsi/pdc_adma.c diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index be96cb78e3b5..e2845b442776 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -489,11 +489,11 @@ config SCSI_SATA_NV If unsure, say N. -config SCSI_SATA_PROMISE - tristate "Promise SATA TX2/TX4 support" +config SCSI_PDC_ADMA + tristate "Pacific Digital ADMA support" depends on SCSI_SATA && PCI help - This option enables support for Promise Serial ATA TX2/TX4. + This option enables support for Pacific Digital ADMA controllers If unsure, say N. @@ -505,6 +505,14 @@ config SCSI_SATA_QSTOR If unsure, say N. +config SCSI_SATA_PROMISE + tristate "Promise SATA TX2/TX4 support" + depends on SCSI_SATA && PCI + help + This option enables support for Promise Serial ATA TX2/TX4. + + If unsure, say N. + config SCSI_SATA_SX4 tristate "Promise SATA SX4 support" depends on SCSI_SATA && PCI && EXPERIMENTAL diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index e2e3d8671930..2d4439826c08 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -138,6 +138,7 @@ obj-$(CONFIG_SCSI_SATA_SX4) += libata.o sata_sx4.o obj-$(CONFIG_SCSI_SATA_NV) += libata.o sata_nv.o obj-$(CONFIG_SCSI_SATA_ULI) += libata.o sata_uli.o obj-$(CONFIG_SCSI_SATA_MV) += libata.o sata_mv.o +obj-$(CONFIG_SCSI_PDC_ADMA) += libata.o pdc_adma.o obj-$(CONFIG_ARM) += arm/ diff --git a/drivers/scsi/pdc_adma.c b/drivers/scsi/pdc_adma.c new file mode 100644 index 000000000000..ce006a5b4533 --- /dev/null +++ b/drivers/scsi/pdc_adma.c @@ -0,0 +1,737 @@ +/* + * pdc_adma.c - Pacific Digital Corporation ADMA + * + * Maintained by: Mark Lord + * + * Copyright 2005 Mark Lord + * + * The contents of this file are subject to the Open + * Software License version 1.1 that can be found at + * http://www.opensource.org/licenses/osl-1.1.txt and is included herein + * by reference. + * + * Alternatively, the contents of this file may be used under the terms + * of the GNU General Public License version 2 (the "GPL") as distributed + * in the kernel source COPYING file, in which case the provisions of + * the GPL are applicable instead of the above. If you wish to allow + * the use of your version of this file only under the terms of the + * GPL and not to allow others to use your version of this file under + * the OSL, indicate your decision by deleting the provisions above and + * replace them with the notice and other provisions required by the GPL. + * If you do not delete the provisions above, a recipient may use your + * version of this file under either the OSL or the GPL. + * + * Supports ATA disks in single-packet ADMA mode. + * Uses PIO for everything else. + * + * TODO: Use ADMA transfers for ATAPI devices, when possible. + * This requires careful attention to a number of quirks of the chip. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "scsi.h" +#include +#include +#include + +#define DRV_NAME "pdc_adma" +#define DRV_VERSION "0.01" + +/* macro to calculate base address for ATA regs */ +#define ADMA_ATA_REGS(base,port_no) ((base) + ((port_no) * 0x40)) + +/* macro to calculate base address for ADMA regs */ +#define ADMA_REGS(base,port_no) ((base) + 0x80 + ((port_no) * 0x20)) + +enum { + ADMA_PORTS = 2, + ADMA_CPB_BYTES = 40, + ADMA_PRD_BYTES = LIBATA_MAX_PRD * 16, + ADMA_PKT_BYTES = ADMA_CPB_BYTES + ADMA_PRD_BYTES, + + ADMA_DMA_BOUNDARY = 0xffffffff, + + /* global register offsets */ + ADMA_MODE_LOCK = 0x00c7, + + /* per-channel register offsets */ + ADMA_CONTROL = 0x0000, /* ADMA control */ + ADMA_STATUS = 0x0002, /* ADMA status */ + ADMA_CPB_COUNT = 0x0004, /* CPB count */ + ADMA_CPB_CURRENT = 0x000c, /* current CPB address */ + ADMA_CPB_NEXT = 0x000c, /* next CPB address */ + ADMA_CPB_LOOKUP = 0x0010, /* CPB lookup table */ + ADMA_FIFO_IN = 0x0014, /* input FIFO threshold */ + ADMA_FIFO_OUT = 0x0016, /* output FIFO threshold */ + + /* ADMA_CONTROL register bits */ + aNIEN = (1 << 8), /* irq mask: 1==masked */ + aGO = (1 << 7), /* packet trigger ("Go!") */ + aRSTADM = (1 << 5), /* ADMA logic reset */ + aAUTEN = (1 << 3), /* packet trigger ("Go!") */ + aRSTA = (1 << 2), /* ATA hard reset */ + aPIOMD4 = 0x0003, /* PIO mode 4 */ + + /* ADMA_STATUS register bits */ + aPSD = (1 << 6), + aUIRQ = (1 << 4), + aPERR = (1 << 0), + + /* CPB bits */ + cDONE = (1 << 0), + cVLD = (1 << 0), + cDAT = (1 << 2), + cIEN = (1 << 3), + + /* PRD bits */ + pORD = (1 << 4), + pDIRO = (1 << 5), + pEND = (1 << 7), + + /* ATA register flags */ + rIGN = (1 << 5), + rEND = (1 << 7), + + /* ATA register addresses */ + ADMA_REGS_CONTROL = 0x0e, + ADMA_REGS_SECTOR_COUNT = 0x12, + ADMA_REGS_LBA_LOW = 0x13, + ADMA_REGS_LBA_MID = 0x14, + ADMA_REGS_LBA_HIGH = 0x15, + ADMA_REGS_DEVICE = 0x16, + ADMA_REGS_COMMAND = 0x17, + + /* PCI device IDs */ + board_1841_idx = 0, /* ADMA 2-port controller */ +}; + +typedef enum { adma_state_idle, adma_state_pkt, adma_state_mmio } adma_state_t; + +struct adma_port_priv { + u8 *pkt; + dma_addr_t pkt_dma; + adma_state_t state; +}; + +static int adma_ata_init_one (struct pci_dev *pdev, + const struct pci_device_id *ent); +static irqreturn_t adma_intr (int irq, void *dev_instance, + struct pt_regs *regs); +static int adma_port_start(struct ata_port *ap); +static void adma_host_stop(struct ata_host_set *host_set); +static void adma_port_stop(struct ata_port *ap); +static void adma_phy_reset(struct ata_port *ap); +static void adma_qc_prep(struct ata_queued_cmd *qc); +static int adma_qc_issue(struct ata_queued_cmd *qc); +static int adma_check_atapi_dma(struct ata_queued_cmd *qc); +static void adma_bmdma_stop(struct ata_queued_cmd *qc); +static u8 adma_bmdma_status(struct ata_port *ap); +static void adma_irq_clear(struct ata_port *ap); +static void adma_eng_timeout(struct ata_port *ap); + +static Scsi_Host_Template adma_ata_sht = { + .module = THIS_MODULE, + .name = DRV_NAME, + .ioctl = ata_scsi_ioctl, + .queuecommand = ata_scsi_queuecmd, + .eh_strategy_handler = ata_scsi_error, + .can_queue = ATA_DEF_QUEUE, + .this_id = ATA_SHT_THIS_ID, + .sg_tablesize = LIBATA_MAX_PRD, + .max_sectors = ATA_MAX_SECTORS, + .cmd_per_lun = ATA_SHT_CMD_PER_LUN, + .emulated = ATA_SHT_EMULATED, + .use_clustering = ENABLE_CLUSTERING, + .proc_name = DRV_NAME, + .dma_boundary = ADMA_DMA_BOUNDARY, + .slave_configure = ata_scsi_slave_config, + .bios_param = ata_std_bios_param, +}; + +static struct ata_port_operations adma_ata_ops = { + .port_disable = ata_port_disable, + .tf_load = ata_tf_load, + .tf_read = ata_tf_read, + .check_status = ata_check_status, + .check_atapi_dma = adma_check_atapi_dma, + .exec_command = ata_exec_command, + .dev_select = ata_std_dev_select, + .phy_reset = adma_phy_reset, + .qc_prep = adma_qc_prep, + .qc_issue = adma_qc_issue, + .eng_timeout = adma_eng_timeout, + .irq_handler = adma_intr, + .irq_clear = adma_irq_clear, + .port_start = adma_port_start, + .port_stop = adma_port_stop, + .host_stop = adma_host_stop, + .bmdma_stop = adma_bmdma_stop, + .bmdma_status = adma_bmdma_status, +}; + +static struct ata_port_info adma_port_info[] = { + /* board_1841_idx */ + { + .sht = &adma_ata_sht, + .host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | + ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO, + .pio_mask = 0x10, /* pio4 */ + .udma_mask = 0x1f, /* udma0-4 */ + .port_ops = &adma_ata_ops, + }, +}; + +static struct pci_device_id adma_ata_pci_tbl[] = { + { PCI_VENDOR_ID_PDC, 0x1841, PCI_ANY_ID, PCI_ANY_ID, 0, 0, + board_1841_idx }, + + { } /* terminate list */ +}; + +static struct pci_driver adma_ata_pci_driver = { + .name = DRV_NAME, + .id_table = adma_ata_pci_tbl, + .probe = adma_ata_init_one, + .remove = ata_pci_remove_one, +}; + +static int adma_check_atapi_dma(struct ata_queued_cmd *qc) +{ + return 1; /* ATAPI DMA not yet supported */ +} + +static void adma_bmdma_stop(struct ata_queued_cmd *qc) +{ + /* nothing */ +} + +static u8 adma_bmdma_status(struct ata_port *ap) +{ + return 0; +} + +static void adma_irq_clear(struct ata_port *ap) +{ + /* nothing */ +} + +static void adma_reset_engine(void __iomem *chan) +{ + /* reset ADMA to idle state */ + writew(aPIOMD4 | aNIEN | aRSTADM, chan + ADMA_CONTROL); + udelay(2); + writew(aPIOMD4, chan + ADMA_CONTROL); + udelay(2); +} + +static void adma_reinit_engine(struct ata_port *ap) +{ + struct adma_port_priv *pp = ap->private_data; + void __iomem *mmio_base = ap->host_set->mmio_base; + void __iomem *chan = ADMA_REGS(mmio_base, ap->port_no); + + /* mask/clear ATA interrupts */ + writeb(ATA_NIEN, (void __iomem *)ap->ioaddr.ctl_addr); + ata_check_status(ap); + + /* reset the ADMA engine */ + adma_reset_engine(chan); + + /* set in-FIFO threshold to 0x100 */ + writew(0x100, chan + ADMA_FIFO_IN); + + /* set CPB pointer */ + writel((u32)pp->pkt_dma, chan + ADMA_CPB_NEXT); + + /* set out-FIFO threshold to 0x100 */ + writew(0x100, chan + ADMA_FIFO_OUT); + + /* set CPB count */ + writew(1, chan + ADMA_CPB_COUNT); + + /* read/discard ADMA status */ + readb(chan + ADMA_STATUS); +} + +static inline void adma_enter_reg_mode(struct ata_port *ap) +{ + void __iomem *chan = ADMA_REGS(ap->host_set->mmio_base, ap->port_no); + + writew(aPIOMD4, chan + ADMA_CONTROL); + readb(chan + ADMA_STATUS); /* flush */ +} + +static void adma_phy_reset(struct ata_port *ap) +{ + struct adma_port_priv *pp = ap->private_data; + + pp->state = adma_state_idle; + adma_reinit_engine(ap); + ata_port_probe(ap); + ata_bus_reset(ap); +} + +static void adma_eng_timeout(struct ata_port *ap) +{ + struct adma_port_priv *pp = ap->private_data; + + if (pp->state != adma_state_idle) /* healthy paranoia */ + pp->state = adma_state_mmio; + adma_reinit_engine(ap); + ata_eng_timeout(ap); +} + +static int adma_fill_sg(struct ata_queued_cmd *qc) +{ + struct scatterlist *sg = qc->sg; + struct ata_port *ap = qc->ap; + struct adma_port_priv *pp = ap->private_data; + u8 *buf = pp->pkt; + int nelem, i = (2 + buf[3]) * 8; + u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0); + + for (nelem = 0; nelem < qc->n_elem; nelem++,sg++) { + u32 addr; + u32 len; + + addr = (u32)sg_dma_address(sg); + *(__le32 *)(buf + i) = cpu_to_le32(addr); + i += 4; + + len = sg_dma_len(sg) >> 3; + *(__le32 *)(buf + i) = cpu_to_le32(len); + i += 4; + + if ((nelem + 1) == qc->n_elem) + pFLAGS |= pEND; + buf[i++] = pFLAGS; + buf[i++] = qc->dev->dma_mode & 0xf; + buf[i++] = 0; /* pPKLW */ + buf[i++] = 0; /* reserved */ + + *(__le32 *)(buf + i) + = (pFLAGS & pEND) ? 0 : cpu_to_le32(pp->pkt_dma + i + 4); + i += 4; + + VPRINTK("PRD[%u] = (0x%lX, 0x%X)\n", nelem, + (unsigned long)addr, len); + } + return i; +} + +static void adma_qc_prep(struct ata_queued_cmd *qc) +{ + struct adma_port_priv *pp = qc->ap->private_data; + u8 *buf = pp->pkt; + u32 pkt_dma = (u32)pp->pkt_dma; + int i = 0; + + VPRINTK("ENTER\n"); + + adma_enter_reg_mode(qc->ap); + if (qc->tf.protocol != ATA_PROT_DMA) { + ata_qc_prep(qc); + return; + } + + buf[i++] = 0; /* Response flags */ + buf[i++] = 0; /* reserved */ + buf[i++] = cVLD | cDAT | cIEN; + i++; /* cLEN, gets filled in below */ + + *(__le32 *)(buf+i) = cpu_to_le32(pkt_dma); /* cNCPB */ + i += 4; /* cNCPB */ + i += 4; /* cPRD, gets filled in below */ + + buf[i++] = 0; /* reserved */ + buf[i++] = 0; /* reserved */ + buf[i++] = 0; /* reserved */ + buf[i++] = 0; /* reserved */ + + /* ATA registers; must be a multiple of 4 */ + buf[i++] = qc->tf.device; + buf[i++] = ADMA_REGS_DEVICE; + if ((qc->tf.flags & ATA_TFLAG_LBA48)) { + buf[i++] = qc->tf.hob_nsect; + buf[i++] = ADMA_REGS_SECTOR_COUNT; + buf[i++] = qc->tf.hob_lbal; + buf[i++] = ADMA_REGS_LBA_LOW; + buf[i++] = qc->tf.hob_lbam; + buf[i++] = ADMA_REGS_LBA_MID; + buf[i++] = qc->tf.hob_lbah; + buf[i++] = ADMA_REGS_LBA_HIGH; + } + buf[i++] = qc->tf.nsect; + buf[i++] = ADMA_REGS_SECTOR_COUNT; + buf[i++] = qc->tf.lbal; + buf[i++] = ADMA_REGS_LBA_LOW; + buf[i++] = qc->tf.lbam; + buf[i++] = ADMA_REGS_LBA_MID; + buf[i++] = qc->tf.lbah; + buf[i++] = ADMA_REGS_LBA_HIGH; + buf[i++] = 0; + buf[i++] = ADMA_REGS_CONTROL; + buf[i++] = rIGN; + buf[i++] = 0; + buf[i++] = qc->tf.command; + buf[i++] = ADMA_REGS_COMMAND | rEND; + + buf[3] = (i >> 3) - 2; /* cLEN */ + *(__le32 *)(buf+8) = cpu_to_le32(pkt_dma + i); /* cPRD */ + + i = adma_fill_sg(qc); + wmb(); /* flush PRDs and pkt to memory */ +#if 0 + /* dump out CPB + PRDs for debug */ + { + int j, len = 0; + static char obuf[2048]; + for (j = 0; j < i; ++j) { + len += sprintf(obuf+len, "%02x ", buf[j]); + if ((j & 7) == 7) { + printk("%s\n", obuf); + len = 0; + } + } + if (len) + printk("%s\n", obuf); + } +#endif +} + +static inline void adma_packet_start(struct ata_queued_cmd *qc) +{ + struct ata_port *ap = qc->ap; + void __iomem *chan = ADMA_REGS(ap->host_set->mmio_base, ap->port_no); + + VPRINTK("ENTER, ap %p\n", ap); + + /* fire up the ADMA engine */ + writew(aPIOMD4 | aGO | aAUTEN, chan + ADMA_CONTROL); +} + +static int adma_qc_issue(struct ata_queued_cmd *qc) +{ + struct adma_port_priv *pp = qc->ap->private_data; + + switch (qc->tf.protocol) { + case ATA_PROT_DMA: + pp->state = adma_state_pkt; + adma_packet_start(qc); + return 0; + + case ATA_PROT_ATAPI_DMA: + BUG(); + break; + + default: + break; + } + + pp->state = adma_state_mmio; + return ata_qc_issue_prot(qc); +} + +static inline unsigned int adma_intr_pkt(struct ata_host_set *host_set) +{ + unsigned int handled = 0, port_no; + u8 __iomem *mmio_base = host_set->mmio_base; + + for (port_no = 0; port_no < host_set->n_ports; ++port_no) { + struct ata_port *ap = host_set->ports[port_no]; + struct adma_port_priv *pp; + struct ata_queued_cmd *qc; + void __iomem *chan = ADMA_REGS(mmio_base, port_no); + u8 drv_stat, status = readb(chan + ADMA_STATUS); + + if (status == 0) + continue; + handled = 1; + adma_enter_reg_mode(ap); + if ((ap->flags & ATA_FLAG_PORT_DISABLED)) + continue; + pp = ap->private_data; + if (!pp || pp->state != adma_state_pkt) + continue; + qc = ata_qc_from_tag(ap, ap->active_tag); + drv_stat = 0; + if ((status & (aPERR | aPSD | aUIRQ))) + drv_stat = ATA_ERR; + else if (pp->pkt[0] != cDONE) + drv_stat = ATA_ERR; + ata_qc_complete(qc, drv_stat); + } + return handled; +} + +static inline unsigned int adma_intr_mmio(struct ata_host_set *host_set) +{ + unsigned int handled = 0, port_no; + + for (port_no = 0; port_no < host_set->n_ports; ++port_no) { + struct ata_port *ap; + ap = host_set->ports[port_no]; + if (ap && (!(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR)))) { + struct ata_queued_cmd *qc; + struct adma_port_priv *pp = ap->private_data; + if (!pp || pp->state != adma_state_mmio) + continue; + qc = ata_qc_from_tag(ap, ap->active_tag); + if (qc && (!(qc->tf.ctl & ATA_NIEN))) { + + /* check main status, clearing INTRQ */ + u8 status = ata_chk_status(ap); + if ((status & ATA_BUSY)) + continue; + DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", + ap->id, qc->tf.protocol, status); + + /* complete taskfile transaction */ + pp->state = adma_state_idle; + ata_qc_complete(qc, status); + handled = 1; + } + } + } + return handled; +} + +static irqreturn_t adma_intr(int irq, void *dev_instance, struct pt_regs *regs) +{ + struct ata_host_set *host_set = dev_instance; + unsigned int handled = 0; + + VPRINTK("ENTER\n"); + + spin_lock(&host_set->lock); + handled = adma_intr_pkt(host_set) | adma_intr_mmio(host_set); + spin_unlock(&host_set->lock); + + VPRINTK("EXIT\n"); + + return IRQ_RETVAL(handled); +} + +static void adma_ata_setup_port(struct ata_ioports *port, unsigned long base) +{ + port->cmd_addr = + port->data_addr = base + 0x000; + port->error_addr = + port->feature_addr = base + 0x004; + port->nsect_addr = base + 0x008; + port->lbal_addr = base + 0x00c; + port->lbam_addr = base + 0x010; + port->lbah_addr = base + 0x014; + port->device_addr = base + 0x018; + port->status_addr = + port->command_addr = base + 0x01c; + port->altstatus_addr = + port->ctl_addr = base + 0x038; +} + +static int adma_port_start(struct ata_port *ap) +{ + struct device *dev = ap->host_set->dev; + struct adma_port_priv *pp; + int rc; + + rc = ata_port_start(ap); + if (rc) + return rc; + adma_enter_reg_mode(ap); + rc = -ENOMEM; + pp = kcalloc(1, sizeof(*pp), GFP_KERNEL); + if (!pp) + goto err_out; + pp->pkt = dma_alloc_coherent(dev, ADMA_PKT_BYTES, &pp->pkt_dma, + GFP_KERNEL); + if (!pp->pkt) + goto err_out_kfree; + /* paranoia? */ + if ((pp->pkt_dma & 7) != 0) { + printk("bad alignment for pp->pkt_dma: %08x\n", + (u32)pp->pkt_dma); + goto err_out_kfree2; + } + memset(pp->pkt, 0, ADMA_PKT_BYTES); + ap->private_data = pp; + adma_reinit_engine(ap); + return 0; + +err_out_kfree2: + kfree(pp); +err_out_kfree: + kfree(pp); +err_out: + ata_port_stop(ap); + return rc; +} + +static void adma_port_stop(struct ata_port *ap) +{ + struct device *dev = ap->host_set->dev; + struct adma_port_priv *pp = ap->private_data; + + adma_reset_engine(ADMA_REGS(ap->host_set->mmio_base, ap->port_no)); + if (pp != NULL) { + ap->private_data = NULL; + if (pp->pkt != NULL) + dma_free_coherent(dev, ADMA_PKT_BYTES, + pp->pkt, pp->pkt_dma); + kfree(pp); + } + ata_port_stop(ap); +} + +static void adma_host_stop(struct ata_host_set *host_set) +{ + unsigned int port_no; + + for (port_no = 0; port_no < ADMA_PORTS; ++port_no) + adma_reset_engine(ADMA_REGS(host_set->mmio_base, port_no)); + + ata_pci_host_stop(host_set); +} + +static void adma_host_init(unsigned int chip_id, + struct ata_probe_ent *probe_ent) +{ + unsigned int port_no; + void __iomem *mmio_base = probe_ent->mmio_base; + + /* enable/lock aGO operation */ + writeb(7, mmio_base + ADMA_MODE_LOCK); + + /* reset the ADMA logic */ + for (port_no = 0; port_no < ADMA_PORTS; ++port_no) + adma_reset_engine(ADMA_REGS(mmio_base, port_no)); +} + +static int adma_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base) +{ + int rc; + + rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + printk(KERN_ERR DRV_NAME + "(%s): 32-bit DMA enable failed\n", + pci_name(pdev)); + return rc; + } + rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (rc) { + printk(KERN_ERR DRV_NAME + "(%s): 32-bit consistent DMA enable failed\n", + pci_name(pdev)); + return rc; + } + return 0; +} + +static int adma_ata_init_one(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + static int printed_version; + struct ata_probe_ent *probe_ent = NULL; + void __iomem *mmio_base; + unsigned int board_idx = (unsigned int) ent->driver_data; + int rc, port_no; + + if (!printed_version++) + printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); + + rc = pci_enable_device(pdev); + if (rc) + return rc; + + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) + goto err_out; + + if ((pci_resource_flags(pdev, 4) & IORESOURCE_MEM) == 0) { + rc = -ENODEV; + goto err_out_regions; + } + + mmio_base = pci_iomap(pdev, 4, 0); + if (mmio_base == NULL) { + rc = -ENOMEM; + goto err_out_regions; + } + + rc = adma_set_dma_masks(pdev, mmio_base); + if (rc) + goto err_out_iounmap; + + probe_ent = kcalloc(1, sizeof(*probe_ent), GFP_KERNEL); + if (probe_ent == NULL) { + rc = -ENOMEM; + goto err_out_iounmap; + } + + probe_ent->dev = pci_dev_to_dev(pdev); + INIT_LIST_HEAD(&probe_ent->node); + + probe_ent->sht = adma_port_info[board_idx].sht; + probe_ent->host_flags = adma_port_info[board_idx].host_flags; + probe_ent->pio_mask = adma_port_info[board_idx].pio_mask; + probe_ent->mwdma_mask = adma_port_info[board_idx].mwdma_mask; + probe_ent->udma_mask = adma_port_info[board_idx].udma_mask; + probe_ent->port_ops = adma_port_info[board_idx].port_ops; + + probe_ent->irq = pdev->irq; + probe_ent->irq_flags = SA_SHIRQ; + probe_ent->mmio_base = mmio_base; + probe_ent->n_ports = ADMA_PORTS; + + for (port_no = 0; port_no < probe_ent->n_ports; ++port_no) { + adma_ata_setup_port(&probe_ent->port[port_no], + ADMA_ATA_REGS((unsigned long)mmio_base, port_no)); + } + + pci_set_master(pdev); + + /* initialize adapter */ + adma_host_init(board_idx, probe_ent); + + rc = ata_device_add(probe_ent); + kfree(probe_ent); + if (rc != ADMA_PORTS) + goto err_out_iounmap; + return 0; + +err_out_iounmap: + pci_iounmap(pdev, mmio_base); +err_out_regions: + pci_release_regions(pdev); +err_out: + pci_disable_device(pdev); + return rc; +} + +static int __init adma_ata_init(void) +{ + return pci_module_init(&adma_ata_pci_driver); +} + +static void __exit adma_ata_exit(void) +{ + pci_unregister_driver(&adma_ata_pci_driver); +} + +MODULE_AUTHOR("Mark Lord"); +MODULE_DESCRIPTION("Pacific Digital Corporation ADMA low-level driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(pci, adma_ata_pci_tbl); +MODULE_VERSION(DRV_VERSION); + +module_init(adma_ata_init); +module_exit(adma_ata_exit); From 68399bb5080c1d96f2110b0a040b39d3ccd7a18a Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Tue, 11 Oct 2005 01:44:14 -0400 Subject: [PATCH 42/59] [libata pdc_adma] license update, minor cleanup from me: change from OSL+GPL to GPL (with approval) from Mark: Gets rid of an unneeded control bit, slightly increasing throughput. --- drivers/scsi/pdc_adma.c | 34 ++++++++++++++++++---------------- 1 file changed, 18 insertions(+), 16 deletions(-) diff --git a/drivers/scsi/pdc_adma.c b/drivers/scsi/pdc_adma.c index ce006a5b4533..53b8db4be1a9 100644 --- a/drivers/scsi/pdc_adma.c +++ b/drivers/scsi/pdc_adma.c @@ -5,21 +5,24 @@ * * Copyright 2005 Mark Lord * - * The contents of this file are subject to the Open - * Software License version 1.1 that can be found at - * http://www.opensource.org/licenses/osl-1.1.txt and is included herein - * by reference. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * libata documentation is available via 'make {ps|pdf}docs', + * as Documentation/DocBook/libata.* * - * Alternatively, the contents of this file may be used under the terms - * of the GNU General Public License version 2 (the "GPL") as distributed - * in the kernel source COPYING file, in which case the provisions of - * the GPL are applicable instead of the above. If you wish to allow - * the use of your version of this file only under the terms of the - * GPL and not to allow others to use your version of this file under - * the OSL, indicate your decision by deleting the provisions above and - * replace them with the notice and other provisions required by the GPL. - * If you do not delete the provisions above, a recipient may use your - * version of this file under either the OSL or the GPL. * * Supports ATA disks in single-packet ADMA mode. * Uses PIO for everything else. @@ -76,7 +79,6 @@ enum { aNIEN = (1 << 8), /* irq mask: 1==masked */ aGO = (1 << 7), /* packet trigger ("Go!") */ aRSTADM = (1 << 5), /* ADMA logic reset */ - aAUTEN = (1 << 3), /* packet trigger ("Go!") */ aRSTA = (1 << 2), /* ATA hard reset */ aPIOMD4 = 0x0003, /* PIO mode 4 */ @@ -415,7 +417,7 @@ static inline void adma_packet_start(struct ata_queued_cmd *qc) VPRINTK("ENTER, ap %p\n", ap); /* fire up the ADMA engine */ - writew(aPIOMD4 | aGO | aAUTEN, chan + ADMA_CONTROL); + writew(aPIOMD4 | aGO, chan + ADMA_CONTROL); } static int adma_qc_issue(struct ata_queued_cmd *qc) From 07506697d1c615924298406f2357810709c09bcd Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Wed, 12 Oct 2005 15:04:18 +0800 Subject: [PATCH 43/59] [PATCH] libata CHS: move the initialization of taskfile LBA flags (revise #6) move the initialization of taskfile LBA flags "ATA_TFLAG_LBA" and "ATA_TFLAG_LBA48 flags" to the SCSI translation functions Signed-off-by: Albert Lee ============= Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 7 ------- drivers/scsi/libata-scsi.c | 42 +++++++++++++++++++++++--------------- 2 files changed, 25 insertions(+), 24 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index d568914c4344..55d4dee133af 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -3195,13 +3195,6 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, qc->nbytes = qc->curbytes = 0; ata_tf_init(ap, &qc->tf, dev->devno); - - if (dev->flags & ATA_DFLAG_LBA) { - qc->tf.flags |= ATA_TFLAG_LBA; - - if (dev->flags & ATA_DFLAG_LBA48) - qc->tf.flags |= ATA_TFLAG_LBA48; - } } return qc; diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index c64169ca7ff0..ea7a4d8a6fc9 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -492,7 +492,7 @@ static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) tf->flags |= ATA_TFLAG_DEVICE; tf->protocol = ATA_PROT_NODATA; - if ((tf->flags & ATA_TFLAG_LBA48) && + if ((qc->dev->flags & ATA_DFLAG_LBA48) && (ata_id_has_flush_ext(qc->dev->id))) tf->command = ATA_CMD_FLUSH_EXT; else @@ -612,8 +612,6 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; struct ata_device *dev = qc->dev; - unsigned int lba = tf->flags & ATA_TFLAG_LBA; - unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; u64 dev_sectors = qc->dev->n_sectors; u64 block; u32 n_block; @@ -634,16 +632,16 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) goto out_of_range; if ((block + n_block) > dev_sectors) goto out_of_range; - if (lba48) { - if (n_block > (64 * 1024)) - goto invalid_fld; - } else { - if (n_block > 256) - goto invalid_fld; - } - if (lba) { - if (lba48) { + if (dev->flags & ATA_DFLAG_LBA) { + tf->flags |= ATA_TFLAG_LBA; + + if (dev->flags & ATA_DFLAG_LBA48) { + if (n_block > (64 * 1024)) + goto invalid_fld; + + /* use LBA48 */ + tf->flags |= ATA_TFLAG_LBA48; tf->command = ATA_CMD_VERIFY_EXT; tf->hob_nsect = (n_block >> 8) & 0xff; @@ -652,6 +650,10 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) tf->hob_lbam = (block >> 32) & 0xff; tf->hob_lbal = (block >> 24) & 0xff; } else { + if (n_block > 256) + goto invalid_fld; + + /* use LBA28 */ tf->command = ATA_CMD_VERIFY; tf->device |= (block >> 24) & 0xf; @@ -668,6 +670,9 @@ static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) /* CHS */ u32 sect, head, cyl, track; + if (n_block > 256) + goto invalid_fld; + /* Convert LBA to CHS */ track = (u32)block / dev->sectors; cyl = track / dev->heads; @@ -733,8 +738,6 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; struct ata_device *dev = qc->dev; - unsigned int lba = tf->flags & ATA_TFLAG_LBA; - unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; u64 block; u32 n_block; @@ -783,19 +786,24 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) */ goto nothing_to_do; - if (lba) { - if (lba48) { + if (dev->flags & ATA_DFLAG_LBA) { + tf->flags |= ATA_TFLAG_LBA; + + if (dev->flags & ATA_DFLAG_LBA48) { /* The request -may- be too large for LBA48. */ if ((block >> 48) || (n_block > 65536)) goto out_of_range; + /* use LBA48 */ + tf->flags |= ATA_TFLAG_LBA48; + tf->hob_nsect = (n_block >> 8) & 0xff; tf->hob_lbah = (block >> 40) & 0xff; tf->hob_lbam = (block >> 32) & 0xff; tf->hob_lbal = (block >> 24) & 0xff; } else { - /* LBA28 */ + /* use LBA28 */ /* The request -may- be too large for LBA28. */ if ((block >> 28) || (n_block > 256)) From 8cbd6df1f0ce977ab7b61feffa59879bb5e0ed8f Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Wed, 12 Oct 2005 15:06:27 +0800 Subject: [PATCH 44/59] [PATCH] libata CHS: calculate read/write commands and protocol on the fly (revise #6) - merge ata_prot_to_cmd() and ata_dev_set_protocol() as ata_rwcmd_protocol() - pave road for read/write multiple support - remove usage of pre-cached command and protocol values and call ata_rwcmd_protocol() instead Signed-off-by: Albert Lee ============== Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 105 +++++++++++++------------------------ drivers/scsi/libata-scsi.c | 13 +++-- drivers/scsi/libata.h | 1 + include/linux/ata.h | 4 ++ include/linux/libata.h | 6 +-- 5 files changed, 50 insertions(+), 79 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 55d4dee133af..19d3d717faf6 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -616,79 +616,53 @@ void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf) tf->hob_nsect = fis[13]; } -/** - * ata_prot_to_cmd - determine which read/write opcodes to use - * @protocol: ATA_PROT_xxx taskfile protocol - * @lba48: true is lba48 is present - * - * Given necessary input, determine which read/write commands - * to use to transfer data. - * - * LOCKING: - * None. - */ -static int ata_prot_to_cmd(int protocol, int lba48) -{ - int rcmd = 0, wcmd = 0; - - switch (protocol) { - case ATA_PROT_PIO: - if (lba48) { - rcmd = ATA_CMD_PIO_READ_EXT; - wcmd = ATA_CMD_PIO_WRITE_EXT; - } else { - rcmd = ATA_CMD_PIO_READ; - wcmd = ATA_CMD_PIO_WRITE; - } - break; - - case ATA_PROT_DMA: - if (lba48) { - rcmd = ATA_CMD_READ_EXT; - wcmd = ATA_CMD_WRITE_EXT; - } else { - rcmd = ATA_CMD_READ; - wcmd = ATA_CMD_WRITE; - } - break; - - default: - return -1; - } - - return rcmd | (wcmd << 8); -} +static const u8 ata_rw_cmds[] = { + /* pio multi */ + ATA_CMD_READ_MULTI, + ATA_CMD_WRITE_MULTI, + ATA_CMD_READ_MULTI_EXT, + ATA_CMD_WRITE_MULTI_EXT, + /* pio */ + ATA_CMD_PIO_READ, + ATA_CMD_PIO_WRITE, + ATA_CMD_PIO_READ_EXT, + ATA_CMD_PIO_WRITE_EXT, + /* dma */ + ATA_CMD_READ, + ATA_CMD_WRITE, + ATA_CMD_READ_EXT, + ATA_CMD_WRITE_EXT +}; /** - * ata_dev_set_protocol - set taskfile protocol and r/w commands - * @dev: device to examine and configure + * ata_rwcmd_protocol - set taskfile r/w commands and protocol + * @qc: command to examine and configure * - * Examine the device configuration, after we have - * read the identify-device page and configured the - * data transfer mode. Set internal state related to - * the ATA taskfile protocol (pio, pio mult, dma, etc.) - * and calculate the proper read/write commands to use. + * Examine the device configuration and tf->flags to calculate + * the proper read/write commands and protocol to use. * * LOCKING: * caller. */ -static void ata_dev_set_protocol(struct ata_device *dev) +void ata_rwcmd_protocol(struct ata_queued_cmd *qc) { - int pio = (dev->flags & ATA_DFLAG_PIO); - int lba48 = (dev->flags & ATA_DFLAG_LBA48); - int proto, cmd; + struct ata_taskfile *tf = &qc->tf; + struct ata_device *dev = qc->dev; - if (pio) - proto = dev->xfer_protocol = ATA_PROT_PIO; - else - proto = dev->xfer_protocol = ATA_PROT_DMA; + int index, lba48, write; + + lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; + write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; - cmd = ata_prot_to_cmd(proto, lba48); - if (cmd < 0) - BUG(); + if (dev->flags & ATA_DFLAG_PIO) { + tf->protocol = ATA_PROT_PIO; + index = dev->multi_count ? 0 : 4; + } else { + tf->protocol = ATA_PROT_DMA; + index = 8; + } - dev->read_cmd = cmd & 0xff; - dev->write_cmd = (cmd >> 8) & 0xff; + tf->command = ata_rw_cmds[index + lba48 + write]; } static const char * xfer_mode_str[] = { @@ -1641,7 +1615,7 @@ static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode, */ static void ata_set_mode(struct ata_port *ap) { - unsigned int i, xfer_shift; + unsigned int xfer_shift; u8 xfer_mode; int rc; @@ -1670,11 +1644,6 @@ static void ata_set_mode(struct ata_port *ap) if (ap->ops->post_set_mode) ap->ops->post_set_mode(ap); - for (i = 0; i < 2; i++) { - struct ata_device *dev = &ap->device[i]; - ata_dev_set_protocol(dev); - } - return; err_out: diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index ea7a4d8a6fc9..90bf22204668 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -742,15 +742,10 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) u32 n_block; tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; - tf->protocol = qc->dev->xfer_protocol; - if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 || - scsicmd[0] == READ_16) { - tf->command = qc->dev->read_cmd; - } else { - tf->command = qc->dev->write_cmd; + if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || + scsicmd[0] == WRITE_16) tf->flags |= ATA_TFLAG_WRITE; - } /* Calculate the SCSI LBA and transfer length. */ switch (scsicmd[0]) { @@ -812,6 +807,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) tf->device |= (block >> 24) & 0xf; } + ata_rwcmd_protocol(qc); + qc->nsect = n_block; tf->nsect = n_block & 0xff; @@ -828,6 +825,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) if ((block >> 28) || (n_block > 256)) goto out_of_range; + ata_rwcmd_protocol(qc); + /* Convert LBA to CHS */ track = (u32)block / dev->sectors; cyl = track / dev->heads; diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h index a18f2ac1d4a1..67d752ca8ae2 100644 --- a/drivers/scsi/libata.h +++ b/drivers/scsi/libata.h @@ -42,6 +42,7 @@ extern int atapi_enabled; extern int ata_qc_complete_noop(struct ata_queued_cmd *qc, u8 drv_stat); extern struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, struct ata_device *dev); +extern void ata_rwcmd_protocol(struct ata_queued_cmd *qc); extern void ata_qc_free(struct ata_queued_cmd *qc); extern int ata_qc_issue(struct ata_queued_cmd *qc); extern int ata_check_atapi_dma(struct ata_queued_cmd *qc); diff --git a/include/linux/ata.h b/include/linux/ata.h index ecb7346d0c16..630908c9378b 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -128,6 +128,10 @@ enum { ATA_CMD_PIO_READ_EXT = 0x24, ATA_CMD_PIO_WRITE = 0x30, ATA_CMD_PIO_WRITE_EXT = 0x34, + ATA_CMD_READ_MULTI = 0xC4, + ATA_CMD_READ_MULTI_EXT = 0x29, + ATA_CMD_WRITE_MULTI = 0xC5, + ATA_CMD_WRITE_MULTI_EXT = 0x39, ATA_CMD_SET_FEATURES = 0xEF, ATA_CMD_PACKET = 0xA0, ATA_CMD_VERIFY = 0x40, diff --git a/include/linux/libata.h b/include/linux/libata.h index 7929cfc9318d..0261c55f3483 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -283,10 +283,8 @@ struct ata_device { u8 xfer_mode; unsigned int xfer_shift; /* ATA_SHIFT_xxx */ - /* cache info about current transfer mode */ - u8 xfer_protocol; /* taskfile xfer protocol */ - u8 read_cmd; /* opcode to use on read */ - u8 write_cmd; /* opcode to use on write */ + unsigned int multi_count; /* sectors count for + READ/WRITE MULTIPLE */ /* for CHS addressing */ u16 cylinders; /* Number of cylinders */ From 59a10b172fccaea793352c00fd9065f0a5b4ef70 Mon Sep 17 00:00:00 2001 From: Albert Lee Date: Wed, 12 Oct 2005 15:09:42 +0800 Subject: [PATCH 45/59] [PATCH] libata CHS: reread device identify info (revise #6) problem: id[53-58] might be changed after initializing device CHS settings. changes: - call ata_dev_reread_id() to reread the identify device info, after initializing device CHS settings. Signed-off-by: Albert Lee ============ Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 65 +++++++++++++++++++++++++++++++++++++- 1 file changed, 64 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 19d3d717faf6..175d4646333d 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -63,6 +63,7 @@ static unsigned int ata_busy_sleep (struct ata_port *ap, unsigned long tmout_pat, unsigned long tmout); +static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev); static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev); static void ata_set_mode(struct ata_port *ap); static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); @@ -1240,9 +1241,15 @@ retry: * anything else.. * Some drives were very specific about that exact sequence. */ - if (major_version < 4 || (!ata_id_has_lba(dev->id))) + if (major_version < 4 || (!ata_id_has_lba(dev->id))) { ata_dev_init_params(ap, dev); + /* current CHS translation info (id[53-58]) might be + * changed. reread the identify device info. + */ + ata_dev_reread_id(ap, dev); + } + if (ata_id_has_lba(dev->id)) { dev->flags |= ATA_DFLAG_LBA; @@ -2150,6 +2157,62 @@ static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev) DPRINTK("EXIT\n"); } +/** + * ata_dev_reread_id - Reread the device identify device info + * @ap: port where the device is + * @dev: device to reread the identify device info + * + * LOCKING: + */ + +static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev) +{ + DECLARE_COMPLETION(wait); + struct ata_queued_cmd *qc; + unsigned long flags; + int rc; + + qc = ata_qc_new_init(ap, dev); + BUG_ON(qc == NULL); + + ata_sg_init_one(qc, dev->id, sizeof(dev->id)); + qc->dma_dir = DMA_FROM_DEVICE; + + if (dev->class == ATA_DEV_ATA) { + qc->tf.command = ATA_CMD_ID_ATA; + DPRINTK("do ATA identify\n"); + } else { + qc->tf.command = ATA_CMD_ID_ATAPI; + DPRINTK("do ATAPI identify\n"); + } + + qc->tf.flags |= ATA_TFLAG_DEVICE; + qc->tf.protocol = ATA_PROT_PIO; + qc->nsect = 1; + + qc->waiting = &wait; + qc->complete_fn = ata_qc_complete_noop; + + spin_lock_irqsave(&ap->host_set->lock, flags); + rc = ata_qc_issue(qc); + spin_unlock_irqrestore(&ap->host_set->lock, flags); + + if (rc) + goto err_out; + + wait_for_completion(&wait); + + swap_buf_le16(dev->id, ATA_ID_WORDS); + + ata_dump_id(dev); + + DPRINTK("EXIT\n"); + + return; +err_out: + ata_port_disable(ap); +} + /** * ata_dev_init_params - Issue INIT DEV PARAMS command * @ap: Port associated with device @dev From 7e6c1208598004a80b1c1fca4953eb9f2a6aa8bc Mon Sep 17 00:00:00 2001 From: Brett Russ Date: Thu, 20 Oct 2005 08:39:43 -0400 Subject: [PATCH 46/59] [PATCH] libata: Marvell endian fix Jeff found an endian bug in the Marvell driver (thanks!). Here's the fix for it. Signed-off-by: Brett Russ Signed-off-by: Jeff Garzik --- drivers/scsi/sata_mv.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index d457f5673476..9b6213928f7a 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -35,7 +35,7 @@ #include #define DRV_NAME "sata_mv" -#define DRV_VERSION "0.24" +#define DRV_VERSION "0.25" enum { /* BAR's are enumerated in terms of pci_resource_start() terms */ @@ -800,7 +800,8 @@ static void mv_fill_sg(struct ata_queued_cmd *qc) pp->sg_tbl[i].flags_size = cpu_to_le32(sg_len); } if (0 < qc->n_elem) { - pp->sg_tbl[qc->n_elem - 1].flags_size |= EPRD_FLAG_END_OF_TBL; + pp->sg_tbl[qc->n_elem - 1].flags_size |= + cpu_to_le32(EPRD_FLAG_END_OF_TBL); } } From 9ee0c0a2ccd66b90eaeb2f197c0a7da43071af52 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Oct 2005 06:46:02 +0100 Subject: [PATCH 47/59] [PATCH] iomem annotations (sata_nv) Signed-off-by: Al Viro Signed-off-by: Jeff Garzik --- drivers/scsi/sata_nv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c index 9fa2535dd937..8866530bc491 100644 --- a/drivers/scsi/sata_nv.c +++ b/drivers/scsi/sata_nv.c @@ -331,7 +331,7 @@ static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg) return 0xffffffffU; if (host->host_flags & NV_HOST_FLAGS_SCR_MMIO) - return readl((void*)ap->ioaddr.scr_addr + (sc_reg * 4)); + return readl((void __iomem *)ap->ioaddr.scr_addr + (sc_reg * 4)); else return inl(ap->ioaddr.scr_addr + (sc_reg * 4)); } @@ -345,7 +345,7 @@ static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) return; if (host->host_flags & NV_HOST_FLAGS_SCR_MMIO) - writel(val, (void*)ap->ioaddr.scr_addr + (sc_reg * 4)); + writel(val, (void __iomem *)ap->ioaddr.scr_addr + (sc_reg * 4)); else outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)); } From 1e4f2a96aeb373000ccd783e0f5b40294b5e668a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Oct 2005 06:46:02 +0100 Subject: [PATCH 48/59] [PATCH] iomem annotations (ahci) Signed-off-by: Al Viro Signed-off-by: Jeff Garzik --- drivers/scsi/ahci.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index 5ec866b00479..cfa22e4ee547 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -407,7 +407,7 @@ static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in) return 0xffffffffU; } - return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4)); + return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); } @@ -425,7 +425,7 @@ static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in, return; } - writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4)); + writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); } static void ahci_phy_reset(struct ata_port *ap) @@ -453,14 +453,14 @@ static void ahci_phy_reset(struct ata_port *ap) static u8 ahci_check_status(struct ata_port *ap) { - void *mmio = (void *) ap->ioaddr.cmd_addr; + void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr; return readl(mmio + PORT_TFDATA) & 0xFF; } static u8 ahci_check_err(struct ata_port *ap) { - void *mmio = (void *) ap->ioaddr.cmd_addr; + void __iomem *mmio = (void __iomem *) ap->ioaddr.cmd_addr; return (readl(mmio + PORT_TFDATA) >> 8) & 0xFF; } From b181d3b0121e141cb410ea3126b4dbe4f8e1751a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Oct 2005 06:46:02 +0100 Subject: [PATCH 49/59] [PATCH] iomem annotations (sata_promise) Signed-off-by: Al Viro Signed-off-by: Jeff Garzik --- drivers/scsi/sata_promise.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c index def7e0d9dacb..9bf8cbd29901 100644 --- a/drivers/scsi/sata_promise.c +++ b/drivers/scsi/sata_promise.c @@ -324,7 +324,7 @@ static u32 pdc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg) { if (sc_reg > SCR_CONTROL) return 0xffffffffU; - return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4)); + return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); } @@ -333,7 +333,7 @@ static void pdc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, { if (sc_reg > SCR_CONTROL) return; - writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4)); + writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); } static void pdc_qc_prep(struct ata_queued_cmd *qc) @@ -523,8 +523,8 @@ static inline void pdc_packet_start(struct ata_queued_cmd *qc) pp->pkt[2] = seq; wmb(); /* flush PRD, pkt writes */ - writel(pp->pkt_dma, (void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); - readl((void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); /* flush */ + writel(pp->pkt_dma, (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); + readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); /* flush */ } static int pdc_qc_issue_prot(struct ata_queued_cmd *qc) From 0420dd121d395e76f6b80fe232e7b4bc6a046f18 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Oct 2005 06:46:02 +0100 Subject: [PATCH 50/59] [PATCH] enum safety (sata_qstor) sata_qstor strays into a nasty area - gcc handling of wide enums is full of bugs that got fixed between gcc versions creating portability nightmare. Single-member enums are safe, so are ones that stay within the range of int or unsigned int. Anything beyond that is asking for trouble. Declaration of constants split in two enums, taking the ~0UL one into a separate enum. Signed-off-by: Al Viro Signed-off-by: Jeff Garzik --- drivers/scsi/sata_qstor.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/sata_qstor.c b/drivers/scsi/sata_qstor.c index ffcdeb68641c..e1c1dae27c52 100644 --- a/drivers/scsi/sata_qstor.c +++ b/drivers/scsi/sata_qstor.c @@ -51,8 +51,6 @@ enum { QS_PRD_BYTES = QS_MAX_PRD * 16, QS_PKT_BYTES = QS_CPB_BYTES + QS_PRD_BYTES, - QS_DMA_BOUNDARY = ~0UL, - /* global register offsets */ QS_HCF_CNFG3 = 0x0003, /* host configuration offset */ QS_HID_HPHY = 0x0004, /* host physical interface info */ @@ -101,6 +99,10 @@ enum { board_2068_idx = 0, /* QStor 4-port SATA/RAID */ }; +enum { + QS_DMA_BOUNDARY = ~0UL +}; + typedef enum { qs_state_idle, qs_state_pkt, qs_state_mmio } qs_state_t; struct qs_port_priv { From a9afd7cd2f65ff85f5ffe931beb879ccf12540e0 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Oct 2005 06:46:02 +0100 Subject: [PATCH 51/59] [PATCH] iomem annotations (sata_sx4) Signed-off-by: Al Viro Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sx4.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/sata_sx4.c b/drivers/scsi/sata_sx4.c index 540a85191172..d6d350a0b5e9 100644 --- a/drivers/scsi/sata_sx4.c +++ b/drivers/scsi/sata_sx4.c @@ -137,7 +137,7 @@ struct pdc_port_priv { }; struct pdc_host_priv { - void *dimm_mmio; + void __iomem *dimm_mmio; unsigned int doing_hdma; unsigned int hdma_prod; @@ -247,7 +247,7 @@ static void pdc20621_host_stop(struct ata_host_set *host_set) { struct pci_dev *pdev = to_pci_dev(host_set->dev); struct pdc_host_priv *hpriv = host_set->private_data; - void *dimm_mmio = hpriv->dimm_mmio; + void __iomem *dimm_mmio = hpriv->dimm_mmio; pci_iounmap(pdev, dimm_mmio); kfree(hpriv); @@ -669,8 +669,8 @@ static void pdc20621_packet_start(struct ata_queued_cmd *qc) readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */ writel(port_ofs + PDC_DIMM_ATA_PKT, - (void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); - readl((void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); + (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); + readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); VPRINTK("submitted ofs 0x%x (%u), seq %u\n", port_ofs + PDC_DIMM_ATA_PKT, port_ofs + PDC_DIMM_ATA_PKT, @@ -747,8 +747,8 @@ static inline unsigned int pdc20621_host_intr( struct ata_port *ap, writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4)); readl(mmio + PDC_20621_SEQCTL + (seq * 4)); writel(port_ofs + PDC_DIMM_ATA_PKT, - (void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); - readl((void *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); + (void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); + readl((void __iomem *) ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); } /* step two - execute ATA command */ @@ -1014,7 +1014,7 @@ static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource, idx++; dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size : (long) (window_size - offset); - memcpy_toio((char *) (dimm_mmio + offset / 4), (char *) psource, dist); + memcpy_toio(dimm_mmio + offset / 4, psource, dist); writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); @@ -1023,8 +1023,7 @@ static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource, for (; (long) size >= (long) window_size ;) { writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); - memcpy_toio((char *) (dimm_mmio), (char *) psource, - window_size / 4); + memcpy_toio(dimm_mmio, psource, window_size / 4); writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); psource += window_size; @@ -1035,7 +1034,7 @@ static void pdc20621_put_to_dimm(struct ata_probe_ent *pe, void *psource, if (size) { writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); - memcpy_toio((char *) (dimm_mmio), (char *) psource, size / 4); + memcpy_toio(dimm_mmio, psource, size / 4); writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); } From 9aa36e89b5677a98d951cf7bef6d99a0f93ea633 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Oct 2005 06:46:02 +0100 Subject: [PATCH 52/59] [PATCH] iomem annotations (sata_sil) Signed-off-by: Al Viro Signed-off-by: Jeff Garzik --- drivers/scsi/sata_sil.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c index ba98a175ee3a..f6f0184e1ac8 100644 --- a/drivers/scsi/sata_sil.c +++ b/drivers/scsi/sata_sil.c @@ -289,7 +289,7 @@ static inline unsigned long sil_scr_addr(struct ata_port *ap, unsigned int sc_re static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg) { - void *mmio = (void *) sil_scr_addr(ap, sc_reg); + void __iomem *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg); if (mmio) return readl(mmio); return 0xffffffffU; @@ -297,7 +297,7 @@ static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg) static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) { - void *mmio = (void *) sil_scr_addr(ap, sc_reg); + void *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg); if (mmio) writel(val, mmio); } From 307e4dc28ee255bf22b431f242f847c9d96fe3fa Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Oct 2005 06:46:02 +0100 Subject: [PATCH 53/59] [PATCH] iomem annotations (sata_vsc) Signed-off-by: Al Viro Signed-off-by: Jeff Garzik --- drivers/scsi/sata_vsc.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c index cf94e0158a8d..877b9fda3965 100644 --- a/drivers/scsi/sata_vsc.c +++ b/drivers/scsi/sata_vsc.c @@ -86,7 +86,7 @@ static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg) { if (sc_reg > SCR_CONTROL) return 0xffffffffU; - return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4)); + return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); } @@ -95,16 +95,16 @@ static void vsc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, { if (sc_reg > SCR_CONTROL) return; - writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4)); + writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); } static void vsc_intr_mask_update(struct ata_port *ap, u8 ctl) { - unsigned long mask_addr; + void __iomem *mask_addr; u8 mask; - mask_addr = (unsigned long) ap->host_set->mmio_base + + mask_addr = ap->host_set->mmio_base + VSC_SATA_INT_MASK_OFFSET + ap->port_no; mask = readb(mask_addr); if (ctl & ATA_NIEN) @@ -283,7 +283,7 @@ static int __devinit vsc_sata_init_one (struct pci_dev *pdev, const struct pci_d struct ata_probe_ent *probe_ent = NULL; unsigned long base; int pci_dev_busy = 0; - void *mmio_base; + void __iomem *mmio_base; int rc; if (!printed_version++) From 11e29e21514517f3022a1f30998ac4c7b1197658 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 21 Oct 2005 18:46:32 -0400 Subject: [PATCH 54/59] libata: handle early device PIO modes correctly --- drivers/scsi/libata-core.c | 31 +++++++++++++++++++++++++++---- include/linux/ata.h | 13 +++++++++---- 2 files changed, 36 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 175d4646333d..09639e7aaa71 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1082,6 +1082,31 @@ static inline void ata_dump_id(struct ata_device *dev) dev->id[93]); } +/* + * Compute the PIO modes available for this device. This is not as + * trivial as it seems if we must consider early devices correctly. + * + * FIXME: pre IDE drive timing (do we care ?). + */ + +static unsigned int ata_pio_modes(struct ata_device *adev) +{ + u16 modes; + + /* Usual case. Word 53 indicates word 88 is valid */ + if (adev->id[ATA_ID_FIELD_VALID] & (1 << 2)) { + modes = adev->id[ATA_ID_PIO_MODES] & 0x03; + modes <<= 3; + modes |= 0x7; + return modes; + } + + /* If word 88 isn't valid then Word 51 holds the PIO timing number + for the maximum. Turn it into a mask and return it */ + modes = (2 << (adev->id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ; + return modes; +} + /** * ata_dev_identify - obtain IDENTIFY x DEVICE page * @ap: port on which device we wish to probe resides @@ -1215,10 +1240,8 @@ retry: xfer_modes = dev->id[ATA_ID_UDMA_MODES]; if (!xfer_modes) xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA; - if (!xfer_modes) { - xfer_modes = (dev->id[ATA_ID_PIO_MODES]) << (ATA_SHIFT_PIO + 3); - xfer_modes |= (0x7 << ATA_SHIFT_PIO); - } + if (!xfer_modes) + xfer_modes = ata_pio_modes(dev); ata_dump_id(dev); diff --git a/include/linux/ata.h b/include/linux/ata.h index 630908c9378b..33276d1d05d2 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -42,13 +42,18 @@ enum { ATA_SECT_SIZE = 512, ATA_ID_WORDS = 256, - ATA_ID_PROD_OFS = 27, - ATA_ID_FW_REV_OFS = 23, ATA_ID_SERNO_OFS = 10, - ATA_ID_MAJOR_VER = 80, - ATA_ID_PIO_MODES = 64, + ATA_ID_FW_REV_OFS = 23, + ATA_ID_PROD_OFS = 27, + ATA_ID_OLD_PIO_MODES = 51, + ATA_ID_FIELD_VALID = 53, ATA_ID_MWDMA_MODES = 63, + ATA_ID_PIO_MODES = 64, + ATA_ID_EIDE_DMA_MIN = 65, + ATA_ID_EIDE_PIO = 67, + ATA_ID_EIDE_PIO_IORDY = 68, ATA_ID_UDMA_MODES = 88, + ATA_ID_MAJOR_VER = 80, ATA_ID_PIO4 = (1 << 1), ATA_PCI_CTL_OFS = 2, From 452503f993feffe96e8cc9fbff4888b96e2c5e40 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 21 Oct 2005 19:01:32 -0400 Subject: [PATCH 55/59] Add ide-timing functionality to libata. This is needed for full AMD and VIA drivers and possibly more. Functions to turn actual clocking and cycle timings into register values. Also to merge shared timings to compute an optimal timing set. Built from the drivers/ide version by Vojtech Pavlik Signed-off-by: Alan Cox Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 149 +++++++++++++++++++++++++++++++++++++ include/linux/libata.h | 39 ++++++++++ 2 files changed, 188 insertions(+) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 09639e7aaa71..9269fd9b814f 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1538,6 +1538,152 @@ void ata_port_disable(struct ata_port *ap) ap->flags |= ATA_FLAG_PORT_DISABLED; } +/* + * This mode timing computation functionality is ported over from + * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik + */ +/* + * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). + * These were taken from ATA/ATAPI-6 standard, rev 0a, except + * for PIO 5, which is a nonstandard extension and UDMA6, which + * is currently supported only by Maxtor drives. + */ + +static const struct ata_timing ata_timing[] = { + + { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, + { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, + { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, + { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, + + { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, + { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, + { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, + +/* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ + + { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, + { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, + { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, + + { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, + { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, + { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, + +/* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */ + { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, + { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, + + { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, + { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, + { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, + +/* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ + + { 0xFF } +}; + +#define ENOUGH(v,unit) (((v)-1)/(unit)+1) +#define EZ(v,unit) ((v)?ENOUGH(v,unit):0) + +static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) +{ + q->setup = EZ(t->setup * 1000, T); + q->act8b = EZ(t->act8b * 1000, T); + q->rec8b = EZ(t->rec8b * 1000, T); + q->cyc8b = EZ(t->cyc8b * 1000, T); + q->active = EZ(t->active * 1000, T); + q->recover = EZ(t->recover * 1000, T); + q->cycle = EZ(t->cycle * 1000, T); + q->udma = EZ(t->udma * 1000, UT); +} + +void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, + struct ata_timing *m, unsigned int what) +{ + if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); + if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); + if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); + if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); + if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); + if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); + if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); + if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); +} + +static const struct ata_timing* ata_timing_find_mode(unsigned short speed) +{ + const struct ata_timing *t; + + for (t = ata_timing; t->mode != speed; t++) + if (t->mode != 0xFF) + return NULL; + return t; +} + +int ata_timing_compute(struct ata_device *adev, unsigned short speed, + struct ata_timing *t, int T, int UT) +{ + const struct ata_timing *s; + struct ata_timing p; + + /* + * Find the mode. + */ + + if (!(s = ata_timing_find_mode(speed))) + return -EINVAL; + + /* + * If the drive is an EIDE drive, it can tell us it needs extended + * PIO/MW_DMA cycle timing. + */ + + if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ + memset(&p, 0, sizeof(p)); + if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { + if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; + else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; + } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { + p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; + } + ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); + } + + /* + * Convert the timing to bus clock counts. + */ + + ata_timing_quantize(s, t, T, UT); + + /* + * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T + * and some other commands. We have to ensure that the DMA cycle timing is + * slower/equal than the fastest PIO timing. + */ + + if (speed > XFER_PIO_4) { + ata_timing_compute(adev, adev->pio_mode, &p, T, UT); + ata_timing_merge(&p, t, t, ATA_TIMING_ALL); + } + + /* + * Lenghten active & recovery time so that cycle time is correct. + */ + + if (t->act8b + t->rec8b < t->cyc8b) { + t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; + t->rec8b = t->cyc8b - t->act8b; + } + + if (t->active + t->recover < t->cycle) { + t->active += (t->cycle - (t->active + t->recover)) / 2; + t->recover = t->cycle - t->active; + } + + return 0; +} + static struct { unsigned int shift; u8 base; @@ -4764,6 +4910,9 @@ EXPORT_SYMBOL_GPL(ata_dev_id_string); EXPORT_SYMBOL_GPL(ata_dev_config); EXPORT_SYMBOL_GPL(ata_scsi_simulate); +EXPORT_SYMBOL_GPL(ata_timing_compute); +EXPORT_SYMBOL_GPL(ata_timing_merge); + #ifdef CONFIG_PCI EXPORT_SYMBOL_GPL(pci_test_config_bits); EXPORT_SYMBOL_GPL(ata_pci_host_stop); diff --git a/include/linux/libata.h b/include/linux/libata.h index 0261c55f3483..0e214f8c8f9f 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -388,6 +388,19 @@ struct ata_port_info { struct ata_port_operations *port_ops; }; +struct ata_timing { + unsigned short mode; /* ATA mode */ + unsigned short setup; /* t1 */ + unsigned short act8b; /* t2 for 8-bit I/O */ + unsigned short rec8b; /* t2i for 8-bit I/O */ + unsigned short cyc8b; /* t0 for 8-bit I/O */ + unsigned short active; /* t2 or tD */ + unsigned short recover; /* t2i or tK */ + unsigned short cycle; /* t0 */ + unsigned short udma; /* t2CYCTYP/2 */ +}; + +#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) extern void ata_port_probe(struct ata_port *); extern void __sata_phy_reset(struct ata_port *ap); @@ -451,6 +464,32 @@ extern int ata_std_bios_param(struct scsi_device *sdev, sector_t capacity, int geom[]); extern int ata_scsi_slave_config(struct scsi_device *sdev); +/* + * Timing helpers + */ +extern int ata_timing_compute(struct ata_device *, unsigned short, + struct ata_timing *, int, int); +extern void ata_timing_merge(const struct ata_timing *, + const struct ata_timing *, struct ata_timing *, + unsigned int); + +enum { + ATA_TIMING_SETUP = (1 << 0), + ATA_TIMING_ACT8B = (1 << 1), + ATA_TIMING_REC8B = (1 << 2), + ATA_TIMING_CYC8B = (1 << 3), + ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | + ATA_TIMING_CYC8B, + ATA_TIMING_ACTIVE = (1 << 4), + ATA_TIMING_RECOVER = (1 << 5), + ATA_TIMING_CYCLE = (1 << 6), + ATA_TIMING_UDMA = (1 << 7), + ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | + ATA_TIMING_REC8B | ATA_TIMING_CYC8B | + ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | + ATA_TIMING_CYCLE | ATA_TIMING_UDMA, +}; + #ifdef CONFIG_PCI struct pci_bits { From cf482935c6abe5245e481213c6e6df808c976f56 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Sat, 22 Oct 2005 00:19:33 -0400 Subject: [PATCH 56/59] libata: turn on block layer clustering --- include/linux/libata.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/libata.h b/include/linux/libata.h index 0e214f8c8f9f..634b5aa0a615 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -91,7 +91,7 @@ enum { ATA_SHT_EMULATED = 1, ATA_SHT_CMD_PER_LUN = 1, ATA_SHT_THIS_ID = -1, - ATA_SHT_USE_CLUSTERING = 0, + ATA_SHT_USE_CLUSTERING = 1, /* struct ata_device stuff */ ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */ From 057ace5e79da9ebf2aa82833cfea825533ac06fb Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Sat, 22 Oct 2005 14:27:05 -0400 Subject: [PATCH 57/59] libata: const-ification bombing run Enforce access rules where appropriate. If the compiler is smart enough, this may buy us an optimization or two as a side effect. --- drivers/scsi/ahci.c | 2 +- drivers/scsi/ata_piix.c | 4 +-- drivers/scsi/libata-core.c | 68 ++++++++++++++++++------------------- drivers/scsi/libata-scsi.c | 24 ++++++------- drivers/scsi/libata.h | 2 +- drivers/scsi/pdc_adma.c | 2 +- drivers/scsi/sata_mv.c | 2 +- drivers/scsi/sata_nv.c | 2 +- drivers/scsi/sata_promise.c | 12 +++---- drivers/scsi/sata_qstor.c | 2 +- drivers/scsi/sata_sil.c | 2 +- drivers/scsi/sata_sil24.c | 2 +- drivers/scsi/sata_sis.c | 2 +- drivers/scsi/sata_svw.c | 4 +-- drivers/scsi/sata_sx4.c | 10 +++--- drivers/scsi/sata_uli.c | 2 +- drivers/scsi/sata_via.c | 2 +- drivers/scsi/sata_vsc.c | 4 +-- include/linux/ata.h | 6 ++-- include/linux/libata.h | 32 ++++++++--------- 20 files changed, 93 insertions(+), 93 deletions(-) diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index cfa22e4ee547..fe8187d6f58b 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -216,7 +216,7 @@ static Scsi_Host_Template ahci_sht = { .ordered_flush = 1, }; -static struct ata_port_operations ahci_ops = { +static const struct ata_port_operations ahci_ops = { .port_disable = ata_port_disable, .check_status = ahci_check_status, diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index d71cef767cec..be021478f416 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -147,7 +147,7 @@ static Scsi_Host_Template piix_sht = { .ordered_flush = 1, }; -static struct ata_port_operations piix_pata_ops = { +static const struct ata_port_operations piix_pata_ops = { .port_disable = ata_port_disable, .set_piomode = piix_set_piomode, .set_dmamode = piix_set_dmamode, @@ -177,7 +177,7 @@ static struct ata_port_operations piix_pata_ops = { .host_stop = ata_host_stop, }; -static struct ata_port_operations piix_sata_ops = { +static const struct ata_port_operations piix_sata_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index 9269fd9b814f..d55f12dacfcb 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -67,9 +67,9 @@ static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev); static void ata_dev_init_params(struct ata_port *ap, struct ata_device *dev); static void ata_set_mode(struct ata_port *ap); static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev); -static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift); +static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift); static int fgb(u32 bitmap); -static int ata_choose_xfer_mode(struct ata_port *ap, +static int ata_choose_xfer_mode(const struct ata_port *ap, u8 *xfer_mode_out, unsigned int *xfer_shift_out); static void __ata_qc_complete(struct ata_queued_cmd *qc); @@ -97,7 +97,7 @@ MODULE_VERSION(DRV_VERSION); * Inherited from caller. */ -static void ata_tf_load_pio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_tf_load_pio(struct ata_port *ap, const struct ata_taskfile *tf) { struct ata_ioports *ioaddr = &ap->ioaddr; unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; @@ -155,7 +155,7 @@ static void ata_tf_load_pio(struct ata_port *ap, struct ata_taskfile *tf) * Inherited from caller. */ -static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { struct ata_ioports *ioaddr = &ap->ioaddr; unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; @@ -224,7 +224,7 @@ static void ata_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) * LOCKING: * Inherited from caller. */ -void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) +void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) ata_tf_load_mmio(ap, tf); @@ -244,7 +244,7 @@ void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) * spin_lock_irqsave(host_set lock) */ -static void ata_exec_command_pio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_exec_command_pio(struct ata_port *ap, const struct ata_taskfile *tf) { DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); @@ -265,7 +265,7 @@ static void ata_exec_command_pio(struct ata_port *ap, struct ata_taskfile *tf) * spin_lock_irqsave(host_set lock) */ -static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command); @@ -285,7 +285,7 @@ static void ata_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) * LOCKING: * spin_lock_irqsave(host_set lock) */ -void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) +void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf) { if (ap->flags & ATA_FLAG_MMIO) ata_exec_command_mmio(ap, tf); @@ -305,7 +305,7 @@ void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf) * Obtains host_set lock. */ -static inline void ata_exec(struct ata_port *ap, struct ata_taskfile *tf) +static inline void ata_exec(struct ata_port *ap, const struct ata_taskfile *tf) { unsigned long flags; @@ -328,7 +328,7 @@ static inline void ata_exec(struct ata_port *ap, struct ata_taskfile *tf) * Obtains host_set lock. */ -static void ata_tf_to_host(struct ata_port *ap, struct ata_taskfile *tf) +static void ata_tf_to_host(struct ata_port *ap, const struct ata_taskfile *tf) { ap->ops->tf_load(ap, tf); @@ -348,7 +348,7 @@ static void ata_tf_to_host(struct ata_port *ap, struct ata_taskfile *tf) * spin_lock_irqsave(host_set lock) */ -void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf) +void ata_tf_to_host_nolock(struct ata_port *ap, const struct ata_taskfile *tf) { ap->ops->tf_load(ap, tf); ap->ops->exec_command(ap, tf); @@ -558,7 +558,7 @@ u8 ata_chk_err(struct ata_port *ap) * Inherited from caller. */ -void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp) +void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) { fis[0] = 0x27; /* Register - Host to Device FIS */ fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, @@ -599,7 +599,7 @@ void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp) * Inherited from caller. */ -void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf) +void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) { tf->command = fis[2]; /* status */ tf->feature = fis[3]; /* error */ @@ -845,7 +845,7 @@ static unsigned int ata_devchk(struct ata_port *ap, * the event of failure. */ -unsigned int ata_dev_classify(struct ata_taskfile *tf) +unsigned int ata_dev_classify(const struct ata_taskfile *tf) { /* Apple's open source Darwin code hints that some devices only * put a proper signature into the LBA mid/high registers, @@ -937,7 +937,7 @@ static u8 ata_dev_try_classify(struct ata_port *ap, unsigned int device) * caller. */ -void ata_dev_id_string(u16 *id, unsigned char *s, +void ata_dev_id_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len) { unsigned int c; @@ -1054,7 +1054,7 @@ void ata_dev_select(struct ata_port *ap, unsigned int device, * caller. */ -static inline void ata_dump_id(struct ata_device *dev) +static inline void ata_dump_id(const struct ata_device *dev) { DPRINTK("49==0x%04x " "53==0x%04x " @@ -1089,7 +1089,7 @@ static inline void ata_dump_id(struct ata_device *dev) * FIXME: pre IDE drive timing (do we care ?). */ -static unsigned int ata_pio_modes(struct ata_device *adev) +static unsigned int ata_pio_modes(const struct ata_device *adev) { u16 modes; @@ -1352,7 +1352,7 @@ err_out: } -static inline u8 ata_dev_knobble(struct ata_port *ap) +static inline u8 ata_dev_knobble(const struct ata_port *ap) { return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id))); } @@ -1684,7 +1684,7 @@ int ata_timing_compute(struct ata_device *adev, unsigned short speed, return 0; } -static struct { +static const struct { unsigned int shift; u8 base; } xfer_mode_classes[] = { @@ -2093,7 +2093,8 @@ err_out: DPRINTK("EXIT\n"); } -static void ata_pr_blacklisted(struct ata_port *ap, struct ata_device *dev) +static void ata_pr_blacklisted(const struct ata_port *ap, + const struct ata_device *dev) { printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n", ap->id, dev->devno); @@ -2131,7 +2132,7 @@ static const char * ata_dma_blacklist [] = { "_NEC DV5800A", }; -static int ata_dma_blacklisted(struct ata_port *ap, struct ata_device *dev) +static int ata_dma_blacklisted(const struct ata_device *dev) { unsigned char model_num[40]; char *s; @@ -2156,9 +2157,9 @@ static int ata_dma_blacklisted(struct ata_port *ap, struct ata_device *dev) return 0; } -static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) +static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift) { - struct ata_device *master, *slave; + const struct ata_device *master, *slave; unsigned int mask; master = &ap->device[0]; @@ -2170,14 +2171,14 @@ static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) mask = ap->udma_mask; if (ata_dev_present(master)) { mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff); - if (ata_dma_blacklisted(ap, master)) { + if (ata_dma_blacklisted(master)) { mask = 0; ata_pr_blacklisted(ap, master); } } if (ata_dev_present(slave)) { mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff); - if (ata_dma_blacklisted(ap, slave)) { + if (ata_dma_blacklisted(slave)) { mask = 0; ata_pr_blacklisted(ap, slave); } @@ -2187,14 +2188,14 @@ static unsigned int ata_get_mode_mask(struct ata_port *ap, int shift) mask = ap->mwdma_mask; if (ata_dev_present(master)) { mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07); - if (ata_dma_blacklisted(ap, master)) { + if (ata_dma_blacklisted(master)) { mask = 0; ata_pr_blacklisted(ap, master); } } if (ata_dev_present(slave)) { mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07); - if (ata_dma_blacklisted(ap, slave)) { + if (ata_dma_blacklisted(slave)) { mask = 0; ata_pr_blacklisted(ap, slave); } @@ -2258,7 +2259,7 @@ static int fgb(u32 bitmap) * Zero on success, negative on error. */ -static int ata_choose_xfer_mode(struct ata_port *ap, +static int ata_choose_xfer_mode(const struct ata_port *ap, u8 *xfer_mode_out, unsigned int *xfer_shift_out) { @@ -4144,7 +4145,7 @@ static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, struct ata_host_set *host_set, - struct ata_probe_ent *ent, unsigned int port_no) + const struct ata_probe_ent *ent, unsigned int port_no) { unsigned int i; @@ -4203,7 +4204,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, * */ -static struct ata_port * ata_host_add(struct ata_probe_ent *ent, +static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, struct ata_host_set *host_set, unsigned int port_no) { @@ -4251,7 +4252,7 @@ err_out: * */ -int ata_device_add(struct ata_probe_ent *ent) +int ata_device_add(const struct ata_probe_ent *ent) { unsigned int count = 0, i; struct device *dev = ent->dev; @@ -4470,7 +4471,7 @@ void ata_std_ports(struct ata_ioports *ioaddr) } static struct ata_probe_ent * -ata_probe_ent_alloc(struct device *dev, struct ata_port_info *port) +ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port) { struct ata_probe_ent *probe_ent; @@ -4570,7 +4571,6 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, stru if (!probe_ent) return NULL; - probe_ent->legacy_mode = 1; probe_ent->n_ports = 1; probe_ent->hard_port_no = port_num; @@ -4783,7 +4783,7 @@ void ata_pci_remove_one (struct pci_dev *pdev) } /* move to PCI subsystem */ -int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits) +int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) { unsigned long tmp = 0; diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 90bf22204668..58858886d751 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -44,9 +44,9 @@ #include "libata.h" -typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd); +typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd); static struct ata_device * -ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev); +ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev); static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, @@ -418,7 +418,7 @@ int ata_scsi_error(struct Scsi_Host *host) */ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc, - u8 *scsicmd) + const u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; @@ -485,7 +485,7 @@ invalid_fld: * Zero on success, non-zero on error. */ -static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) +static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; @@ -512,7 +512,7 @@ static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) * @plen: the transfer length */ -static void scsi_6_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) +static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) { u64 lba = 0; u32 len = 0; @@ -539,7 +539,7 @@ static void scsi_6_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) * @plen: the transfer length */ -static void scsi_10_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) +static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) { u64 lba = 0; u32 len = 0; @@ -569,7 +569,7 @@ static void scsi_10_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) * @plen: the transfer length */ -static void scsi_16_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) +static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen) { u64 lba = 0; u32 len = 0; @@ -608,7 +608,7 @@ static void scsi_16_lba_len(u8 *scsicmd, u64 *plba, u32 *plen) * Zero on success, non-zero on error. */ -static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) +static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; struct ata_device *dev = qc->dev; @@ -734,7 +734,7 @@ nothing_to_do: * Zero on success, non-zero on error. */ -static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) +static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) { struct ata_taskfile *tf = &qc->tf; struct ata_device *dev = qc->dev; @@ -1688,7 +1688,7 @@ static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) * Zero on success, non-zero on failure. */ -static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) +static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) { struct scsi_cmnd *cmd = qc->scsicmd; struct ata_device *dev = qc->dev; @@ -1757,7 +1757,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd) */ static struct ata_device * -ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev) +ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) { struct ata_device *dev; @@ -1914,7 +1914,7 @@ void ata_scsi_simulate(u16 *id, void (*done)(struct scsi_cmnd *)) { struct ata_scsi_args args; - u8 *scsicmd = cmd->cmnd; + const u8 *scsicmd = cmd->cmnd; args.id = id; args.cmd = cmd; diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h index 67d752ca8ae2..3d60190584ba 100644 --- a/drivers/scsi/libata.h +++ b/drivers/scsi/libata.h @@ -48,7 +48,7 @@ extern int ata_qc_issue(struct ata_queued_cmd *qc); extern int ata_check_atapi_dma(struct ata_queued_cmd *qc); extern void ata_dev_select(struct ata_port *ap, unsigned int device, unsigned int wait, unsigned int can_sleep); -extern void ata_tf_to_host_nolock(struct ata_port *ap, struct ata_taskfile *tf); +extern void ata_tf_to_host_nolock(struct ata_port *ap, const struct ata_taskfile *tf); extern void swap_buf_le16(u16 *buf, unsigned int buf_words); diff --git a/drivers/scsi/pdc_adma.c b/drivers/scsi/pdc_adma.c index 53b8db4be1a9..9820f272f889 100644 --- a/drivers/scsi/pdc_adma.c +++ b/drivers/scsi/pdc_adma.c @@ -158,7 +158,7 @@ static Scsi_Host_Template adma_ata_sht = { .bios_param = ata_std_bios_param, }; -static struct ata_port_operations adma_ata_ops = { +static const struct ata_port_operations adma_ata_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, .tf_read = ata_tf_read, diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c index 9b6213928f7a..422e0b6f603a 100644 --- a/drivers/scsi/sata_mv.c +++ b/drivers/scsi/sata_mv.c @@ -290,7 +290,7 @@ static Scsi_Host_Template mv_sht = { .ordered_flush = 1, }; -static struct ata_port_operations mv_ops = { +static const struct ata_port_operations mv_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c index 8866530bc491..1a56d6c79ddd 100644 --- a/drivers/scsi/sata_nv.c +++ b/drivers/scsi/sata_nv.c @@ -238,7 +238,7 @@ static Scsi_Host_Template nv_sht = { .ordered_flush = 1, }; -static struct ata_port_operations nv_ops = { +static const struct ata_port_operations nv_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, .tf_read = ata_tf_read, diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c index 9bf8cbd29901..eee93b0016df 100644 --- a/drivers/scsi/sata_promise.c +++ b/drivers/scsi/sata_promise.c @@ -87,8 +87,8 @@ static void pdc_port_stop(struct ata_port *ap); static void pdc_pata_phy_reset(struct ata_port *ap); static void pdc_sata_phy_reset(struct ata_port *ap); static void pdc_qc_prep(struct ata_queued_cmd *qc); -static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf); -static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf); +static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf); +static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf); static void pdc_irq_clear(struct ata_port *ap); static int pdc_qc_issue_prot(struct ata_queued_cmd *qc); @@ -113,7 +113,7 @@ static Scsi_Host_Template pdc_ata_sht = { .ordered_flush = 1, }; -static struct ata_port_operations pdc_sata_ops = { +static const struct ata_port_operations pdc_sata_ops = { .port_disable = ata_port_disable, .tf_load = pdc_tf_load_mmio, .tf_read = ata_tf_read, @@ -136,7 +136,7 @@ static struct ata_port_operations pdc_sata_ops = { .host_stop = ata_pci_host_stop, }; -static struct ata_port_operations pdc_pata_ops = { +static const struct ata_port_operations pdc_pata_ops = { .port_disable = ata_port_disable, .tf_load = pdc_tf_load_mmio, .tf_read = ata_tf_read, @@ -546,7 +546,7 @@ static int pdc_qc_issue_prot(struct ata_queued_cmd *qc) return ata_qc_issue_prot(qc); } -static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON (tf->protocol == ATA_PROT_DMA || tf->protocol == ATA_PROT_NODATA); @@ -554,7 +554,7 @@ static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) } -static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON (tf->protocol == ATA_PROT_DMA || tf->protocol == ATA_PROT_NODATA); diff --git a/drivers/scsi/sata_qstor.c b/drivers/scsi/sata_qstor.c index e1c1dae27c52..250dafa6bc36 100644 --- a/drivers/scsi/sata_qstor.c +++ b/drivers/scsi/sata_qstor.c @@ -147,7 +147,7 @@ static Scsi_Host_Template qs_ata_sht = { .bios_param = ata_std_bios_param, }; -static struct ata_port_operations qs_ata_ops = { +static const struct ata_port_operations qs_ata_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, .tf_read = ata_tf_read, diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c index f6f0184e1ac8..3a056173fb95 100644 --- a/drivers/scsi/sata_sil.c +++ b/drivers/scsi/sata_sil.c @@ -150,7 +150,7 @@ static Scsi_Host_Template sil_sht = { .ordered_flush = 1, }; -static struct ata_port_operations sil_ops = { +static const struct ata_port_operations sil_ops = { .port_disable = ata_port_disable, .dev_config = sil_dev_config, .tf_load = ata_tf_load, diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c index 19857814d69f..32d730bd5bb6 100644 --- a/drivers/scsi/sata_sil24.c +++ b/drivers/scsi/sata_sil24.c @@ -275,7 +275,7 @@ static Scsi_Host_Template sil24_sht = { .ordered_flush = 1, /* NCQ not supported yet */ }; -static struct ata_port_operations sil24_ops = { +static const struct ata_port_operations sil24_ops = { .port_disable = ata_port_disable, .check_status = sil24_check_status, diff --git a/drivers/scsi/sata_sis.c b/drivers/scsi/sata_sis.c index 0761a3234fcf..057f7b98b6c4 100644 --- a/drivers/scsi/sata_sis.c +++ b/drivers/scsi/sata_sis.c @@ -102,7 +102,7 @@ static Scsi_Host_Template sis_sht = { .ordered_flush = 1, }; -static struct ata_port_operations sis_ops = { +static const struct ata_port_operations sis_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, .tf_read = ata_tf_read, diff --git a/drivers/scsi/sata_svw.c b/drivers/scsi/sata_svw.c index d89d968bedac..e0f9570bc6dd 100644 --- a/drivers/scsi/sata_svw.c +++ b/drivers/scsi/sata_svw.c @@ -102,7 +102,7 @@ static void k2_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, } -static void k2_sata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) +static void k2_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) { struct ata_ioports *ioaddr = &ap->ioaddr; unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; @@ -297,7 +297,7 @@ static Scsi_Host_Template k2_sata_sht = { }; -static struct ata_port_operations k2_sata_ops = { +static const struct ata_port_operations k2_sata_ops = { .port_disable = ata_port_disable, .tf_load = k2_sata_tf_load, .tf_read = k2_sata_tf_read, diff --git a/drivers/scsi/sata_sx4.c b/drivers/scsi/sata_sx4.c index d6d350a0b5e9..af08f4f650c1 100644 --- a/drivers/scsi/sata_sx4.c +++ b/drivers/scsi/sata_sx4.c @@ -157,8 +157,8 @@ static void pdc_20621_phy_reset (struct ata_port *ap); static int pdc_port_start(struct ata_port *ap); static void pdc_port_stop(struct ata_port *ap); static void pdc20621_qc_prep(struct ata_queued_cmd *qc); -static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf); -static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf); +static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf); +static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf); static void pdc20621_host_stop(struct ata_host_set *host_set); static unsigned int pdc20621_dimm_init(struct ata_probe_ent *pe); static int pdc20621_detect_dimm(struct ata_probe_ent *pe); @@ -196,7 +196,7 @@ static Scsi_Host_Template pdc_sata_sht = { .ordered_flush = 1, }; -static struct ata_port_operations pdc_20621_ops = { +static const struct ata_port_operations pdc_20621_ops = { .port_disable = ata_port_disable, .tf_load = pdc_tf_load_mmio, .tf_read = ata_tf_read, @@ -899,7 +899,7 @@ out: DPRINTK("EXIT\n"); } -static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON (tf->protocol == ATA_PROT_DMA || tf->protocol == ATA_PROT_NODATA); @@ -907,7 +907,7 @@ static void pdc_tf_load_mmio(struct ata_port *ap, struct ata_taskfile *tf) } -static void pdc_exec_command_mmio(struct ata_port *ap, struct ata_taskfile *tf) +static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON (tf->protocol == ATA_PROT_DMA || tf->protocol == ATA_PROT_NODATA); diff --git a/drivers/scsi/sata_uli.c b/drivers/scsi/sata_uli.c index 9c06f2abe7f7..d68dc7d3422c 100644 --- a/drivers/scsi/sata_uli.c +++ b/drivers/scsi/sata_uli.c @@ -90,7 +90,7 @@ static Scsi_Host_Template uli_sht = { .ordered_flush = 1, }; -static struct ata_port_operations uli_ops = { +static const struct ata_port_operations uli_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, diff --git a/drivers/scsi/sata_via.c b/drivers/scsi/sata_via.c index 565872479b9a..80e291a909a9 100644 --- a/drivers/scsi/sata_via.c +++ b/drivers/scsi/sata_via.c @@ -109,7 +109,7 @@ static Scsi_Host_Template svia_sht = { .ordered_flush = 1, }; -static struct ata_port_operations svia_sata_ops = { +static const struct ata_port_operations svia_sata_ops = { .port_disable = ata_port_disable, .tf_load = ata_tf_load, diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c index 877b9fda3965..5af05fdf8544 100644 --- a/drivers/scsi/sata_vsc.c +++ b/drivers/scsi/sata_vsc.c @@ -115,7 +115,7 @@ static void vsc_intr_mask_update(struct ata_port *ap, u8 ctl) } -static void vsc_sata_tf_load(struct ata_port *ap, struct ata_taskfile *tf) +static void vsc_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) { struct ata_ioports *ioaddr = &ap->ioaddr; unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; @@ -231,7 +231,7 @@ static Scsi_Host_Template vsc_sata_sht = { }; -static struct ata_port_operations vsc_sata_ops = { +static const struct ata_port_operations vsc_sata_ops = { .port_disable = ata_port_disable, .tf_load = vsc_sata_tf_load, .tf_read = vsc_sata_tf_read, diff --git a/include/linux/ata.h b/include/linux/ata.h index 33276d1d05d2..d2873b732bb1 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -261,7 +261,7 @@ struct ata_taskfile { ((u64) (id)[(n) + 1] << 16) | \ ((u64) (id)[(n) + 0]) ) -static inline int ata_id_current_chs_valid(u16 *id) +static inline int ata_id_current_chs_valid(const u16 *id) { /* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command has not been issued to the device then the values of @@ -273,7 +273,7 @@ static inline int ata_id_current_chs_valid(u16 *id) id[56]; /* sectors in current translation */ } -static inline int atapi_cdb_len(u16 *dev_id) +static inline int atapi_cdb_len(const u16 *dev_id) { u16 tmp = dev_id[0] & 0x3; switch (tmp) { @@ -283,7 +283,7 @@ static inline int atapi_cdb_len(u16 *dev_id) } } -static inline int is_atapi_taskfile(struct ata_taskfile *tf) +static inline int is_atapi_taskfile(const struct ata_taskfile *tf) { return (tf->protocol == ATA_PROT_ATAPI) || (tf->protocol == ATA_PROT_ATAPI_NODATA) || diff --git a/include/linux/libata.h b/include/linux/libata.h index 634b5aa0a615..00a8a5738858 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -202,7 +202,7 @@ struct ata_ioports { struct ata_probe_ent { struct list_head node; struct device *dev; - struct ata_port_operations *port_ops; + const struct ata_port_operations *port_ops; Scsi_Host_Template *sht; struct ata_ioports port[ATA_MAX_PORTS]; unsigned int n_ports; @@ -225,7 +225,7 @@ struct ata_host_set { void __iomem *mmio_base; unsigned int n_ports; void *private_data; - struct ata_port_operations *ops; + const struct ata_port_operations *ops; struct ata_port * ports[0]; }; @@ -294,7 +294,7 @@ struct ata_device { struct ata_port { struct Scsi_Host *host; /* our co-allocated scsi host */ - struct ata_port_operations *ops; + const struct ata_port_operations *ops; unsigned long flags; /* ATA_FLAG_xxx */ unsigned int id; /* unique id req'd by scsi midlyr */ unsigned int port_no; /* unique port #; from zero */ @@ -341,10 +341,10 @@ struct ata_port_operations { void (*set_piomode) (struct ata_port *, struct ata_device *); void (*set_dmamode) (struct ata_port *, struct ata_device *); - void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf); + void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); - void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf); + void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); u8 (*check_status)(struct ata_port *ap); u8 (*check_altstatus)(struct ata_port *ap); u8 (*check_err)(struct ata_port *ap); @@ -385,7 +385,7 @@ struct ata_port_info { unsigned long pio_mask; unsigned long mwdma_mask; unsigned long udma_mask; - struct ata_port_operations *port_ops; + const struct ata_port_operations *port_ops; }; struct ata_timing { @@ -413,7 +413,7 @@ extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_i unsigned int n_ports); extern void ata_pci_remove_one (struct pci_dev *pdev); #endif /* CONFIG_PCI */ -extern int ata_device_add(struct ata_probe_ent *ent); +extern int ata_device_add(const struct ata_probe_ent *ent); extern void ata_host_set_remove(struct ata_host_set *host_set); extern int ata_scsi_detect(Scsi_Host_Template *sht); extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); @@ -426,16 +426,16 @@ extern int ata_ratelimit(void); /* * Default driver ops implementations */ -extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf); +extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); -extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp); -extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf); +extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); +extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); extern u8 ata_check_status(struct ata_port *ap); extern u8 ata_altstatus(struct ata_port *ap); extern u8 ata_chk_err(struct ata_port *ap); -extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf); +extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); extern int ata_port_start (struct ata_port *ap); extern void ata_port_stop (struct ata_port *ap); extern void ata_host_stop (struct ata_host_set *host_set); @@ -446,8 +446,8 @@ extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen); extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, unsigned int n_elem); -extern unsigned int ata_dev_classify(struct ata_taskfile *tf); -extern void ata_dev_id_string(u16 *id, unsigned char *s, +extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); +extern void ata_dev_id_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len); extern void ata_dev_config(struct ata_port *ap, unsigned int i); extern void ata_bmdma_setup (struct ata_queued_cmd *qc); @@ -502,7 +502,7 @@ struct pci_bits { extern void ata_pci_host_stop (struct ata_host_set *host_set); extern struct ata_probe_ent * ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); -extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits); +extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); #endif /* CONFIG_PCI */ @@ -512,7 +512,7 @@ static inline unsigned int ata_tag_valid(unsigned int tag) return (tag < ATA_MAX_QUEUE) ? 1 : 0; } -static inline unsigned int ata_dev_present(struct ata_device *dev) +static inline unsigned int ata_dev_present(const struct ata_device *dev) { return ((dev->class == ATA_DEV_ATA) || (dev->class == ATA_DEV_ATAPI)); @@ -711,7 +711,7 @@ static inline unsigned int sata_dev_present(struct ata_port *ap) return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; } -static inline int ata_try_flush_cache(struct ata_device *dev) +static inline int ata_try_flush_cache(const struct ata_device *dev) { return ata_id_wcache_enabled(dev->id) || ata_id_has_flush(dev->id) || From 6f0ef4fa57b9ba27d7b1c330bad041f1665501fe Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Tue, 25 Oct 2005 01:44:30 -0400 Subject: [PATCH 58/59] [PATCH] libata kernel-doc fixes Correct some function names in kernel-doc. Add some kernel-doc descriptions. Fix some typos. Remove a few blank lines. Signed-off-by: Randy Dunlap Signed-off-by: Jeff Garzik --- drivers/scsi/libata-core.c | 36 ++++++++++++++---------------------- 1 file changed, 14 insertions(+), 22 deletions(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index d55f12dacfcb..dcd3b5553cc8 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -87,7 +87,7 @@ MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); /** - * ata_tf_load - send taskfile registers to host controller + * ata_tf_load_pio - send taskfile registers to host controller * @ap: Port to which output is sent * @tf: ATA taskfile register set * @@ -2701,13 +2701,13 @@ void ata_poll_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) /** * ata_pio_poll - - * @ap: + * @ap: the target ata_port * * LOCKING: * None. (executing in kernel thread context) * * RETURNS: - * + * timeout value to use */ static unsigned long ata_pio_poll(struct ata_port *ap) @@ -2748,8 +2748,8 @@ static unsigned long ata_pio_poll(struct ata_port *ap) } /** - * ata_pio_complete - - * @ap: + * ata_pio_complete - check if drive is busy or idle + * @ap: the target ata_port * * LOCKING: * None. (executing in kernel thread context) @@ -2801,7 +2801,7 @@ static int ata_pio_complete (struct ata_port *ap) /** - * swap_buf_le16 - + * swap_buf_le16 - swap halves of 16-words in place * @buf: Buffer to swap * @buf_words: Number of 16-bit words in buffer. * @@ -2810,6 +2810,7 @@ static int ata_pio_complete (struct ata_port *ap) * vice-versa. * * LOCKING: + * Inherited from caller. */ void swap_buf_le16(u16 *buf, unsigned int buf_words) { @@ -2832,7 +2833,6 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words) * * LOCKING: * Inherited from caller. - * */ static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, @@ -2878,7 +2878,6 @@ static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, * * LOCKING: * Inherited from caller. - * */ static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, @@ -2918,7 +2917,6 @@ static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, * * LOCKING: * Inherited from caller. - * */ static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, @@ -3071,7 +3069,6 @@ next_sg: * * LOCKING: * Inherited from caller. - * */ static void atapi_pio_bytes(struct ata_queued_cmd *qc) @@ -3107,8 +3104,8 @@ err_out: } /** - * ata_pio_sector - - * @ap: + * ata_pio_block - start PIO on a block + * @ap: the target ata_port * * LOCKING: * None. (executing in kernel thread context) @@ -3120,7 +3117,7 @@ static void ata_pio_block(struct ata_port *ap) u8 status; /* - * This is purely hueristic. This is a fast path. + * This is purely heuristic. This is a fast path. * Sometimes when we enter, BSY will be cleared in * a chk-status or two. If not, the drive is probably seeking * or something. Snooze for a couple msecs, then @@ -3440,7 +3437,6 @@ static void __ata_qc_complete(struct ata_queued_cmd *qc) * * LOCKING: * spin_lock_irqsave(host_set lock) - * */ void ata_qc_free(struct ata_queued_cmd *qc) { @@ -3460,7 +3456,6 @@ void ata_qc_free(struct ata_queued_cmd *qc) * * LOCKING: * spin_lock_irqsave(host_set lock) - * */ void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) @@ -3954,7 +3949,6 @@ idle_irq: * * RETURNS: * IRQ_NONE or IRQ_HANDLED. - * */ irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) @@ -4066,6 +4060,7 @@ err_out: * May be used as the port_start() entry in ata_port_operations. * * LOCKING: + * Inherited from caller. */ int ata_port_start (struct ata_port *ap) @@ -4091,6 +4086,7 @@ int ata_port_start (struct ata_port *ap) * May be used as the port_stop() entry in ata_port_operations. * * LOCKING: + * Inherited from caller. */ void ata_port_stop (struct ata_port *ap) @@ -4113,6 +4109,7 @@ void ata_host_stop (struct ata_host_set *host_set) * @do_unregister: 1 if we fully unregister, 0 to just stop the port * * LOCKING: + * Inherited from caller. */ static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) @@ -4140,7 +4137,6 @@ static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) * * LOCKING: * Inherited from caller. - * */ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, @@ -4201,7 +4197,6 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, * * RETURNS: * New ata_port on success, for NULL on error. - * */ static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, @@ -4249,7 +4244,6 @@ err_out: * * RETURNS: * Number of ports registered. Zero on error (no ports registered). - * */ int ata_device_add(const struct ata_probe_ent *ent) @@ -4381,7 +4375,6 @@ err_out: * Inherited from calling layer (may sleep). */ - void ata_host_set_remove(struct ata_host_set *host_set) { struct ata_port *ap; @@ -4614,7 +4607,6 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, stru * * RETURNS: * Zero on success, negative on errno-based value on error. - * */ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, @@ -4762,7 +4754,7 @@ err_out: * @pdev: PCI device that was removed * * PCI layer indicates to libata via this hook that - * hot-unplug or module unload event has occured. + * hot-unplug or module unload event has occurred. * Handle this by unregistering all objects associated * with this PCI device. Free those objects. Then finally * release PCI resources and disable device. From 91190758d410a5d33c6051ba9ca95baa430256bb Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 26 Oct 2005 12:17:46 -0400 Subject: [PATCH 59/59] [libata] ata_timing fix --- drivers/scsi/libata-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index dcd3b5553cc8..f53d7b8ac33f 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -1616,7 +1616,7 @@ static const struct ata_timing* ata_timing_find_mode(unsigned short speed) const struct ata_timing *t; for (t = ata_timing; t->mode != speed; t++) - if (t->mode != 0xFF) + if (t->mode == 0xFF) return NULL; return t; }