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linux-sg2042/drivers/scsi/sata_sil24.c

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/*
* sata_sil24.c - Driver for Silicon Image 3124/3132 SATA-2 controllers
*
* Copyright 2005 Tejun Heo
*
* Based on preview driver from Silicon Image.
*
* 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 <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <linux/libata.h>
#include <asm/io.h>
#define DRV_NAME "sata_sil24"
#define DRV_VERSION "0.23"
/*
* 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) */
PORT_PM = 0x0f80, /* 8 bytes PM * 16 (128 bytes) */
/* 32 bit regs */
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, /* command execution fifo */
PORT_CMD_ERR = 0x1024, /* command error number */
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_CDB16 = (1 << 5), /* 0=12b cdb, 1=16b cdb */
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 */
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 while sending service */
/* bits of PRB control field */
PRB_CTRL_PROTOCOL = (1 << 0), /* override def. ATA protocol */
PRB_CTRL_PACKET_READ = (1 << 4), /* PACKET cmd read */
PRB_CTRL_PACKET_WRITE = (1 << 5), /* PACKET cmd write */
PRB_CTRL_NIEN = (1 << 6), /* Mask completion irq */
PRB_CTRL_SRST = (1 << 7), /* Soft reset request (ign BSY?) */
/* PRB protocol field */
PRB_PROT_PACKET = (1 << 0),
PRB_PROT_TCQ = (1 << 1),
PRB_PROT_NCQ = (1 << 2),
PRB_PROT_READ = (1 << 3),
PRB_PROT_WRITE = (1 << 4),
PRB_PROT_TRANSPARENT = (1 << 5),
/*
* Other constants
*/
SGE_TRM = (1 << 31), /* Last SGE in chain */
SGE_LNK = (1 << 30), /* linked list
Points to SGT, not SGE */
SGE_DRD = (1 << 29), /* discard data read (/dev/null)
data address ignored */
/* board id */
BID_SIL3124 = 0,
BID_SIL3132 = 1,
BID_SIL3131 = 2,
IRQ_STAT_4PORTS = 0xf,
};
struct sil24_ata_block {
struct sil24_prb prb;
struct sil24_sge sge[LIBATA_MAX_PRD];
};
struct sil24_atapi_block {
struct sil24_prb prb;
u8 cdb[16];
struct sil24_sge sge[LIBATA_MAX_PRD - 1];
};
union sil24_cmd_block {
struct sil24_ata_block ata;
struct sil24_atapi_block atapi;
};
/*
* ap->private_data
*
* The preview driver always returned 0 for status. We emulate it
* here from the previous interrupt.
*/
struct sil24_port_priv {
union 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 */
struct sil24_host_priv {
void __iomem *host_base; /* global controller control (128 bytes @BAR0) */
void __iomem *port_base; /* port registers (4 * 8192 bytes @BAR2) */
};
static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev);
static u8 sil24_check_status(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);
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 const 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 */
};
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 struct 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 const struct ata_port_operations sil24_ops = {
.port_disable = ata_port_disable,
.dev_config = sil24_dev_config,
.check_status = sil24_check_status,
.check_altstatus = sil24_check_status,
.dev_select = ata_noop_dev_select,
.tf_read = sil24_tf_read,
.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,
};
/*
* 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_SRST | ATA_FLAG_MMIO |
ATA_FLAG_PIO_DMA | SIL24_NPORTS2FLAG(4),
.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_SRST | ATA_FLAG_MMIO |
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_SRST | 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 */
.port_ops = &sil24_ops,
},
};
static void sil24_dev_config(struct ata_port *ap, struct ata_device *dev)
{
void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
if (ap->cdb_len == 16)
writel(PORT_CS_CDB16, port + PORT_CTRL_STAT);
else
writel(PORT_CS_CDB16, port + PORT_CTRL_CLR);
}
static inline void sil24_update_tf(struct ata_port *ap)
{
struct sil24_port_priv *pp = ap->private_data;
void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
struct sil24_prb __iomem *prb = port;
u8 fis[6 * 4];
memcpy_fromio(fis, prb->fis, 6 * 4);
ata_tf_from_fis(fis, &pp->tf);
}
static u8 sil24_check_status(struct ata_port *ap)
{
struct sil24_port_priv *pp = ap->private_data;
return pp->tf.command;
}
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 __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
void __iomem *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 __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
if (sc_reg < ARRAY_SIZE(sil24_scr_map)) {
void __iomem *addr;
addr = scr_addr + sil24_scr_map[sc_reg] * 4;
writel(val, scr_addr + sil24_scr_map[sc_reg] * 4);
}
}
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 int sil24_issue_SRST(struct ata_port *ap)
{
void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
struct sil24_port_priv *pp = ap->private_data;
struct sil24_prb *prb = &pp->cmd_block[0].ata.prb;
dma_addr_t paddr = pp->cmd_block_dma;
u32 irq_enable, irq_stat;
int cnt;
/* temporarily turn off IRQs during SRST */
irq_enable = readl(port + PORT_IRQ_ENABLE_SET);
writel(irq_enable, port + PORT_IRQ_ENABLE_CLR);
/*
* XXX: Not sure whether the following sleep is needed or not.
* The original driver had it. So....
*/
msleep(10);
prb->ctrl = PRB_CTRL_SRST;
prb->fis[1] = 0; /* no PM yet */
writel((u32)paddr, port + PORT_CMD_ACTIVATE);
for (cnt = 0; cnt < 100; cnt++) {
irq_stat = readl(port + PORT_IRQ_STAT);
writel(irq_stat, port + PORT_IRQ_STAT); /* clear irq */
irq_stat >>= PORT_IRQ_RAW_SHIFT;
if (irq_stat & (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR))
break;
msleep(1);
}
/* restore IRQs */
writel(irq_enable, port + PORT_IRQ_ENABLE_SET);
if (!(irq_stat & PORT_IRQ_COMPLETE))
return -1;
/* update TF */
sil24_update_tf(ap);
return 0;
}
static void sil24_phy_reset(struct ata_port *ap)
{
struct sil24_port_priv *pp = ap->private_data;
__sata_phy_reset(ap);
if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
if (sil24_issue_SRST(ap) < 0) {
printk(KERN_ERR DRV_NAME
" ata%u: SRST failed, disabling port\n", ap->id);
ap->ops->port_disable(ap);
return;
}
ap->device->class = ata_dev_classify(&pp->tf);
}
static inline void sil24_fill_sg(struct ata_queued_cmd *qc,
struct sil24_sge *sge)
{
struct scatterlist *sg;
unsigned int idx = 0;
ata_for_each_sg(sg, qc) {
sge->addr = cpu_to_le64(sg_dma_address(sg));
sge->cnt = cpu_to_le32(sg_dma_len(sg));
if (ata_sg_is_last(sg, qc))
sge->flags = cpu_to_le32(SGE_TRM);
else
sge->flags = 0;
sge++;
idx++;
}
}
static void sil24_qc_prep(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct sil24_port_priv *pp = ap->private_data;
union sil24_cmd_block *cb = pp->cmd_block + qc->tag;
struct sil24_prb *prb;
struct sil24_sge *sge;
switch (qc->tf.protocol) {
case ATA_PROT_PIO:
case ATA_PROT_DMA:
case ATA_PROT_NODATA:
prb = &cb->ata.prb;
sge = cb->ata.sge;
prb->ctrl = 0;
break;
case ATA_PROT_ATAPI:
case ATA_PROT_ATAPI_DMA:
case ATA_PROT_ATAPI_NODATA:
prb = &cb->atapi.prb;
sge = cb->atapi.sge;
memset(cb->atapi.cdb, 0, 32);
memcpy(cb->atapi.cdb, qc->cdb, ap->cdb_len);
if (qc->tf.protocol != ATA_PROT_ATAPI_NODATA) {
if (qc->tf.flags & ATA_TFLAG_WRITE)
prb->ctrl = PRB_CTRL_PACKET_WRITE;
else
prb->ctrl = PRB_CTRL_PACKET_READ;
} else
prb->ctrl = 0;
break;
default:
prb = NULL; /* shut up, gcc */
sge = NULL;
BUG();
}
ata_tf_to_fis(&qc->tf, prb->fis, 0);
if (qc->flags & ATA_QCFLAG_DMAMAP)
sil24_fill_sg(qc, sge);
}
static int sil24_qc_issue(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
void __iomem *port = (void __iomem *)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, port + PORT_CMD_ACTIVATE);
return 0;
}
static void sil24_irq_clear(struct ata_port *ap)
{
/* unused */
}
static int __sil24_restart_controller(void __iomem *port)
{
u32 tmp;
int cnt;
writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
/* Max ~10ms */
for (cnt = 0; cnt < 10000; cnt++) {
tmp = readl(port + PORT_CTRL_STAT);
if (tmp & PORT_CS_RDY)
return 0;
udelay(1);
}
return -1;
}
static void sil24_restart_controller(struct ata_port *ap)
{
if (__sil24_restart_controller((void __iomem *)ap->ioaddr.cmd_addr))
printk(KERN_ERR DRV_NAME
" ata%u: failed to restart controller\n", ap->id);
}
static int __sil24_reset_controller(void __iomem *port)
{
int cnt;
u32 tmp;
/* 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)
return -1;
if (tmp & PORT_CS_RDY)
return 0;
return __sil24_restart_controller(port);
}
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 __iomem *)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)
{
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
if (!qc) {
printk(KERN_ERR "ata%u: BUG: timeout 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, AC_ERR_OTHER);
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 __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
u32 irq_stat, cmd_err, sstatus, serror;
unsigned int err_mask;
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);
if (serror)
writel(serror, port + PORT_SERROR);
/*
* Don't log ATAPI device errors. They're supposed to happen
* and any serious errors will be logged using sense data by
* the SCSI layer.
*/
if (ap->device[0].class != ATA_DEV_ATAPI || cmd_err > PORT_CERR_SDB)
printk("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 (cmd_err == PORT_CERR_DEV || cmd_err == PORT_CERR_SDB) {
/*
* Device is reporting error, tf registers are valid.
*/
sil24_update_tf(ap);
err_mask = ac_err_mask(pp->tf.command);
sil24_restart_controller(ap);
} else {
/*
* Other errors. libata currently doesn't have any
* mechanism to report these errors. Just turn on
* ATA_ERR.
*/
err_mask = AC_ERR_OTHER;
sil24_reset_controller(ap);
}
if (qc)
ata_qc_complete(qc, err_mask);
}
static inline void sil24_host_intr(struct ata_port *ap)
{
struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
void __iomem *port = (void __iomem *)ap->ioaddr.cmd_addr;
u32 slot_stat;
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, ac_err_mask(pp->tf.command));
} else
sil24_error_intr(ap, slot_stat);
}
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 == 0xffffffff) {
printk(KERN_ERR DRV_NAME ": IRQ status == 0xffffffff, "
"PCI fault or device removal?\n");
goto out;
}
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]);
handled++;
} else
printk(KERN_ERR DRV_NAME
": interrupt from disabled port %d\n", i);
}
spin_unlock(&host_set->lock);
out:
return IRQ_RETVAL(handled);
}
static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev)
{
const size_t cb_size = sizeof(*pp->cmd_block);
dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);
}
static int sil24_port_start(struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
struct sil24_port_priv *pp;
union sil24_cmd_block *cb;
size_t cb_size = sizeof(*cb);
dma_addr_t cb_dma;
int rc = -ENOMEM;
pp = kzalloc(sizeof(*pp), GFP_KERNEL);
if (!pp)
goto err_out;
pp->tf.command = ATA_DRDY;
cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
if (!cb)
goto err_out_pp;
memset(cb, 0, cb_size);
rc = ata_pad_alloc(ap, dev);
if (rc)
goto err_out_pad;
pp->cmd_block = cb;
pp->cmd_block_dma = cb_dma;
ap->private_data = pp;
return 0;
err_out_pad:
sil24_cblk_free(pp, dev);
err_out_pp:
kfree(pp);
err_out:
return rc;
}
static void sil24_port_stop(struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
struct sil24_port_priv *pp = ap->private_data;
sil24_cblk_free(pp, dev);
ata_pad_free(ap, dev);
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_port_info *pinfo = &sil24_port_info[board_id];
struct ata_probe_ent *probe_ent = NULL;
struct sil24_host_priv *hpriv = NULL;
void __iomem *host_base = NULL;
void __iomem *port_base = NULL;
int i, rc;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "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 = 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;
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) {
dev_printk(KERN_ERR, &pdev->dev,
"32-bit DMA enable failed\n");
goto out_free;
}
rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
if (rc) {
dev_printk(KERN_ERR, &pdev->dev,
"32-bit consistent DMA enable failed\n");
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 __iomem *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_PRB;
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)
dev_printk(KERN_ERR, &pdev->dev,
"failed to clear port RST\n");
}
/* 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);
/* 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))
dev_printk(KERN_ERR, &pdev->dev,
"failed to reset controller\n");
}
/* Turn on interrupts */
writel(IRQ_STAT_4PORTS, host_base + HOST_CTRL);
pci_set_master(pdev);
/* FIXME: check ata_device_add return value */
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);
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