4983 lines
119 KiB
C
4983 lines
119 KiB
C
/*
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* libata-core.c - helper library for ATA
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*
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* Maintained by: Jeff Garzik <jgarzik@pobox.com>
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* Please ALWAYS copy linux-ide@vger.kernel.org
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* on emails.
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*
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* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
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* Copyright 2003-2004 Jeff Garzik
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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* Hardware documentation available from http://www.t13.org/ and
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* http://www.sata-io.org/
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/spinlock.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/completion.h>
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#include <linux/suspend.h>
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#include <linux/workqueue.h>
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#include <linux/jiffies.h>
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#include <linux/scatterlist.h>
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#include <scsi/scsi.h>
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#include "scsi_priv.h"
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <asm/io.h>
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#include <asm/semaphore.h>
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#include <asm/byteorder.h>
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#include "libata.h"
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static unsigned int ata_dev_init_params(struct ata_port *ap,
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struct ata_device *dev,
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u16 heads,
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u16 sectors);
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static void ata_set_mode(struct ata_port *ap);
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static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
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struct ata_device *dev);
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static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev);
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static unsigned int ata_unique_id = 1;
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static struct workqueue_struct *ata_wq;
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int atapi_enabled = 1;
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module_param(atapi_enabled, int, 0444);
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MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
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int libata_fua = 0;
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module_param_named(fua, libata_fua, int, 0444);
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MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
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MODULE_AUTHOR("Jeff Garzik");
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MODULE_DESCRIPTION("Library module for ATA devices");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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/**
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* ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
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* @tf: Taskfile to convert
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* @fis: Buffer into which data will output
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* @pmp: Port multiplier port
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*
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* Converts a standard ATA taskfile to a Serial ATA
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* FIS structure (Register - Host to Device).
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*
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* LOCKING:
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* Inherited from caller.
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*/
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void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp)
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{
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fis[0] = 0x27; /* Register - Host to Device FIS */
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fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number,
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bit 7 indicates Command FIS */
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fis[2] = tf->command;
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fis[3] = tf->feature;
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fis[4] = tf->lbal;
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fis[5] = tf->lbam;
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fis[6] = tf->lbah;
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fis[7] = tf->device;
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fis[8] = tf->hob_lbal;
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fis[9] = tf->hob_lbam;
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fis[10] = tf->hob_lbah;
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fis[11] = tf->hob_feature;
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fis[12] = tf->nsect;
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fis[13] = tf->hob_nsect;
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fis[14] = 0;
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fis[15] = tf->ctl;
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fis[16] = 0;
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fis[17] = 0;
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fis[18] = 0;
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fis[19] = 0;
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}
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/**
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* ata_tf_from_fis - Convert SATA FIS to ATA taskfile
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* @fis: Buffer from which data will be input
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* @tf: Taskfile to output
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*
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* Converts a serial ATA FIS structure to a standard ATA taskfile.
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*
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* LOCKING:
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* Inherited from caller.
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*/
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void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
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{
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tf->command = fis[2]; /* status */
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tf->feature = fis[3]; /* error */
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tf->lbal = fis[4];
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tf->lbam = fis[5];
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tf->lbah = fis[6];
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tf->device = fis[7];
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tf->hob_lbal = fis[8];
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tf->hob_lbam = fis[9];
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tf->hob_lbah = fis[10];
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tf->nsect = fis[12];
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tf->hob_nsect = fis[13];
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}
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static const u8 ata_rw_cmds[] = {
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/* pio multi */
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ATA_CMD_READ_MULTI,
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ATA_CMD_WRITE_MULTI,
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ATA_CMD_READ_MULTI_EXT,
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ATA_CMD_WRITE_MULTI_EXT,
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0,
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0,
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0,
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ATA_CMD_WRITE_MULTI_FUA_EXT,
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/* pio */
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ATA_CMD_PIO_READ,
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ATA_CMD_PIO_WRITE,
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ATA_CMD_PIO_READ_EXT,
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ATA_CMD_PIO_WRITE_EXT,
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0,
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0,
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0,
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0,
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/* dma */
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ATA_CMD_READ,
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ATA_CMD_WRITE,
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ATA_CMD_READ_EXT,
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ATA_CMD_WRITE_EXT,
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0,
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0,
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0,
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ATA_CMD_WRITE_FUA_EXT
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};
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/**
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* ata_rwcmd_protocol - set taskfile r/w commands and protocol
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* @qc: command to examine and configure
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*
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* Examine the device configuration and tf->flags to calculate
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* the proper read/write commands and protocol to use.
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*
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* LOCKING:
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* caller.
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*/
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int ata_rwcmd_protocol(struct ata_queued_cmd *qc)
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{
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struct ata_taskfile *tf = &qc->tf;
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struct ata_device *dev = qc->dev;
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u8 cmd;
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int index, fua, lba48, write;
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fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
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lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
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write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
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if (dev->flags & ATA_DFLAG_PIO) {
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tf->protocol = ATA_PROT_PIO;
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index = dev->multi_count ? 0 : 8;
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} else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) {
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/* Unable to use DMA due to host limitation */
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tf->protocol = ATA_PROT_PIO;
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index = dev->multi_count ? 0 : 8;
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} else {
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tf->protocol = ATA_PROT_DMA;
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index = 16;
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}
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cmd = ata_rw_cmds[index + fua + lba48 + write];
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if (cmd) {
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tf->command = cmd;
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return 0;
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}
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return -1;
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}
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/**
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* ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
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* @pio_mask: pio_mask
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* @mwdma_mask: mwdma_mask
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* @udma_mask: udma_mask
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*
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* Pack @pio_mask, @mwdma_mask and @udma_mask into a single
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* unsigned int xfer_mask.
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*
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* LOCKING:
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* None.
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*
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* RETURNS:
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* Packed xfer_mask.
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*/
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static unsigned int ata_pack_xfermask(unsigned int pio_mask,
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unsigned int mwdma_mask,
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unsigned int udma_mask)
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{
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return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
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((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
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((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
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}
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/**
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* ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
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* @xfer_mask: xfer_mask to unpack
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* @pio_mask: resulting pio_mask
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* @mwdma_mask: resulting mwdma_mask
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* @udma_mask: resulting udma_mask
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*
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* Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
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* Any NULL distination masks will be ignored.
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*/
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static void ata_unpack_xfermask(unsigned int xfer_mask,
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unsigned int *pio_mask,
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unsigned int *mwdma_mask,
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unsigned int *udma_mask)
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{
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if (pio_mask)
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*pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
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if (mwdma_mask)
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*mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
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if (udma_mask)
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*udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
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}
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static const struct ata_xfer_ent {
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int shift, bits;
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u8 base;
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} ata_xfer_tbl[] = {
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{ ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
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{ ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
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{ ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
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{ -1, },
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};
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/**
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* ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
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* @xfer_mask: xfer_mask of interest
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*
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* Return matching XFER_* value for @xfer_mask. Only the highest
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* bit of @xfer_mask is considered.
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*
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* LOCKING:
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* None.
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*
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* RETURNS:
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* Matching XFER_* value, 0 if no match found.
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*/
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static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
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{
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int highbit = fls(xfer_mask) - 1;
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const struct ata_xfer_ent *ent;
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for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
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if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
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return ent->base + highbit - ent->shift;
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return 0;
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}
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/**
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* ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
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* @xfer_mode: XFER_* of interest
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*
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* Return matching xfer_mask for @xfer_mode.
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*
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* LOCKING:
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* None.
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*
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* RETURNS:
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* Matching xfer_mask, 0 if no match found.
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*/
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static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
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{
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const struct ata_xfer_ent *ent;
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for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
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if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
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return 1 << (ent->shift + xfer_mode - ent->base);
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return 0;
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}
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/**
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* ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
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* @xfer_mode: XFER_* of interest
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*
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* Return matching xfer_shift for @xfer_mode.
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*
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* LOCKING:
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* None.
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*
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* RETURNS:
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* Matching xfer_shift, -1 if no match found.
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*/
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static int ata_xfer_mode2shift(unsigned int xfer_mode)
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{
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const struct ata_xfer_ent *ent;
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for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
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if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
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return ent->shift;
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return -1;
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}
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/**
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* ata_mode_string - convert xfer_mask to string
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* @xfer_mask: mask of bits supported; only highest bit counts.
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*
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* Determine string which represents the highest speed
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* (highest bit in @modemask).
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*
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* LOCKING:
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* None.
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*
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* RETURNS:
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* Constant C string representing highest speed listed in
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* @mode_mask, or the constant C string "<n/a>".
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*/
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static const char *ata_mode_string(unsigned int xfer_mask)
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{
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static const char * const xfer_mode_str[] = {
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"PIO0",
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"PIO1",
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"PIO2",
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"PIO3",
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"PIO4",
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"MWDMA0",
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"MWDMA1",
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"MWDMA2",
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"UDMA/16",
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"UDMA/25",
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"UDMA/33",
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"UDMA/44",
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"UDMA/66",
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"UDMA/100",
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"UDMA/133",
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"UDMA7",
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};
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int highbit;
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highbit = fls(xfer_mask) - 1;
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if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
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return xfer_mode_str[highbit];
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return "<n/a>";
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}
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static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
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{
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if (ata_dev_present(dev)) {
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printk(KERN_WARNING "ata%u: dev %u disabled\n",
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ap->id, dev->devno);
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dev->class++;
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}
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}
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/**
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* ata_pio_devchk - PATA device presence detection
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* @ap: ATA channel to examine
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* @device: Device to examine (starting at zero)
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*
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* This technique was originally described in
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* Hale Landis's ATADRVR (www.ata-atapi.com), and
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* later found its way into the ATA/ATAPI spec.
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*
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* Write a pattern to the ATA shadow registers,
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* and if a device is present, it will respond by
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* correctly storing and echoing back the
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* ATA shadow register contents.
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*
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* LOCKING:
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* caller.
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*/
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static unsigned int ata_pio_devchk(struct ata_port *ap,
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unsigned int device)
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{
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struct ata_ioports *ioaddr = &ap->ioaddr;
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u8 nsect, lbal;
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ap->ops->dev_select(ap, device);
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outb(0x55, ioaddr->nsect_addr);
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outb(0xaa, ioaddr->lbal_addr);
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outb(0xaa, ioaddr->nsect_addr);
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outb(0x55, ioaddr->lbal_addr);
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outb(0x55, ioaddr->nsect_addr);
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outb(0xaa, ioaddr->lbal_addr);
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nsect = inb(ioaddr->nsect_addr);
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lbal = inb(ioaddr->lbal_addr);
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if ((nsect == 0x55) && (lbal == 0xaa))
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return 1; /* we found a device */
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return 0; /* nothing found */
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}
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|
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/**
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* ata_mmio_devchk - PATA device presence detection
|
|
* @ap: ATA channel to examine
|
|
* @device: Device to examine (starting at zero)
|
|
*
|
|
* This technique was originally described in
|
|
* Hale Landis's ATADRVR (www.ata-atapi.com), and
|
|
* later found its way into the ATA/ATAPI spec.
|
|
*
|
|
* Write a pattern to the ATA shadow registers,
|
|
* and if a device is present, it will respond by
|
|
* correctly storing and echoing back the
|
|
* ATA shadow register contents.
|
|
*
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* LOCKING:
|
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* caller.
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|
*/
|
|
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static unsigned int ata_mmio_devchk(struct ata_port *ap,
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unsigned int device)
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{
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struct ata_ioports *ioaddr = &ap->ioaddr;
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u8 nsect, lbal;
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ap->ops->dev_select(ap, device);
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writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
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writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
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writeb(0xaa, (void __iomem *) ioaddr->nsect_addr);
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writeb(0x55, (void __iomem *) ioaddr->lbal_addr);
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writeb(0x55, (void __iomem *) ioaddr->nsect_addr);
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writeb(0xaa, (void __iomem *) ioaddr->lbal_addr);
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nsect = readb((void __iomem *) ioaddr->nsect_addr);
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lbal = readb((void __iomem *) ioaddr->lbal_addr);
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if ((nsect == 0x55) && (lbal == 0xaa))
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return 1; /* we found a device */
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|
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return 0; /* nothing found */
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|
}
|
|
|
|
/**
|
|
* ata_devchk - PATA device presence detection
|
|
* @ap: ATA channel to examine
|
|
* @device: Device to examine (starting at zero)
|
|
*
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|
* Dispatch ATA device presence detection, depending
|
|
* on whether we are using PIO or MMIO to talk to the
|
|
* ATA shadow registers.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
|
|
static unsigned int ata_devchk(struct ata_port *ap,
|
|
unsigned int device)
|
|
{
|
|
if (ap->flags & ATA_FLAG_MMIO)
|
|
return ata_mmio_devchk(ap, device);
|
|
return ata_pio_devchk(ap, device);
|
|
}
|
|
|
|
/**
|
|
* ata_dev_classify - determine device type based on ATA-spec signature
|
|
* @tf: ATA taskfile register set for device to be identified
|
|
*
|
|
* Determine from taskfile register contents whether a device is
|
|
* ATA or ATAPI, as per "Signature and persistence" section
|
|
* of ATA/PI spec (volume 1, sect 5.14).
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*
|
|
* RETURNS:
|
|
* Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
|
|
* the event of failure.
|
|
*/
|
|
|
|
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,
|
|
* So, we only check those. It's sufficient for uniqueness.
|
|
*/
|
|
|
|
if (((tf->lbam == 0) && (tf->lbah == 0)) ||
|
|
((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) {
|
|
DPRINTK("found ATA device by sig\n");
|
|
return ATA_DEV_ATA;
|
|
}
|
|
|
|
if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) ||
|
|
((tf->lbam == 0x69) && (tf->lbah == 0x96))) {
|
|
DPRINTK("found ATAPI device by sig\n");
|
|
return ATA_DEV_ATAPI;
|
|
}
|
|
|
|
DPRINTK("unknown device\n");
|
|
return ATA_DEV_UNKNOWN;
|
|
}
|
|
|
|
/**
|
|
* ata_dev_try_classify - Parse returned ATA device signature
|
|
* @ap: ATA channel to examine
|
|
* @device: Device to examine (starting at zero)
|
|
* @r_err: Value of error register on completion
|
|
*
|
|
* After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
|
|
* an ATA/ATAPI-defined set of values is placed in the ATA
|
|
* shadow registers, indicating the results of device detection
|
|
* and diagnostics.
|
|
*
|
|
* Select the ATA device, and read the values from the ATA shadow
|
|
* registers. Then parse according to the Error register value,
|
|
* and the spec-defined values examined by ata_dev_classify().
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*
|
|
* RETURNS:
|
|
* Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
|
|
*/
|
|
|
|
static unsigned int
|
|
ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
|
|
{
|
|
struct ata_taskfile tf;
|
|
unsigned int class;
|
|
u8 err;
|
|
|
|
ap->ops->dev_select(ap, device);
|
|
|
|
memset(&tf, 0, sizeof(tf));
|
|
|
|
ap->ops->tf_read(ap, &tf);
|
|
err = tf.feature;
|
|
if (r_err)
|
|
*r_err = err;
|
|
|
|
/* see if device passed diags */
|
|
if (err == 1)
|
|
/* do nothing */ ;
|
|
else if ((device == 0) && (err == 0x81))
|
|
/* do nothing */ ;
|
|
else
|
|
return ATA_DEV_NONE;
|
|
|
|
/* determine if device is ATA or ATAPI */
|
|
class = ata_dev_classify(&tf);
|
|
|
|
if (class == ATA_DEV_UNKNOWN)
|
|
return ATA_DEV_NONE;
|
|
if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0))
|
|
return ATA_DEV_NONE;
|
|
return class;
|
|
}
|
|
|
|
/**
|
|
* ata_id_string - Convert IDENTIFY DEVICE page into string
|
|
* @id: IDENTIFY DEVICE results we will examine
|
|
* @s: string into which data is output
|
|
* @ofs: offset into identify device page
|
|
* @len: length of string to return. must be an even number.
|
|
*
|
|
* The strings in the IDENTIFY DEVICE page are broken up into
|
|
* 16-bit chunks. Run through the string, and output each
|
|
* 8-bit chunk linearly, regardless of platform.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
|
|
void ata_id_string(const u16 *id, unsigned char *s,
|
|
unsigned int ofs, unsigned int len)
|
|
{
|
|
unsigned int c;
|
|
|
|
while (len > 0) {
|
|
c = id[ofs] >> 8;
|
|
*s = c;
|
|
s++;
|
|
|
|
c = id[ofs] & 0xff;
|
|
*s = c;
|
|
s++;
|
|
|
|
ofs++;
|
|
len -= 2;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_id_c_string - Convert IDENTIFY DEVICE page into C string
|
|
* @id: IDENTIFY DEVICE results we will examine
|
|
* @s: string into which data is output
|
|
* @ofs: offset into identify device page
|
|
* @len: length of string to return. must be an odd number.
|
|
*
|
|
* This function is identical to ata_id_string except that it
|
|
* trims trailing spaces and terminates the resulting string with
|
|
* null. @len must be actual maximum length (even number) + 1.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
void ata_id_c_string(const u16 *id, unsigned char *s,
|
|
unsigned int ofs, unsigned int len)
|
|
{
|
|
unsigned char *p;
|
|
|
|
WARN_ON(!(len & 1));
|
|
|
|
ata_id_string(id, s, ofs, len - 1);
|
|
|
|
p = s + strnlen(s, len - 1);
|
|
while (p > s && p[-1] == ' ')
|
|
p--;
|
|
*p = '\0';
|
|
}
|
|
|
|
static u64 ata_id_n_sectors(const u16 *id)
|
|
{
|
|
if (ata_id_has_lba(id)) {
|
|
if (ata_id_has_lba48(id))
|
|
return ata_id_u64(id, 100);
|
|
else
|
|
return ata_id_u32(id, 60);
|
|
} else {
|
|
if (ata_id_current_chs_valid(id))
|
|
return ata_id_u32(id, 57);
|
|
else
|
|
return id[1] * id[3] * id[6];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_noop_dev_select - Select device 0/1 on ATA bus
|
|
* @ap: ATA channel to manipulate
|
|
* @device: ATA device (numbered from zero) to select
|
|
*
|
|
* This function performs no actual function.
|
|
*
|
|
* May be used as the dev_select() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
|
|
{
|
|
}
|
|
|
|
|
|
/**
|
|
* ata_std_dev_select - Select device 0/1 on ATA bus
|
|
* @ap: ATA channel to manipulate
|
|
* @device: ATA device (numbered from zero) to select
|
|
*
|
|
* Use the method defined in the ATA specification to
|
|
* make either device 0, or device 1, active on the
|
|
* ATA channel. Works with both PIO and MMIO.
|
|
*
|
|
* May be used as the dev_select() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
|
|
void ata_std_dev_select (struct ata_port *ap, unsigned int device)
|
|
{
|
|
u8 tmp;
|
|
|
|
if (device == 0)
|
|
tmp = ATA_DEVICE_OBS;
|
|
else
|
|
tmp = ATA_DEVICE_OBS | ATA_DEV1;
|
|
|
|
if (ap->flags & ATA_FLAG_MMIO) {
|
|
writeb(tmp, (void __iomem *) ap->ioaddr.device_addr);
|
|
} else {
|
|
outb(tmp, ap->ioaddr.device_addr);
|
|
}
|
|
ata_pause(ap); /* needed; also flushes, for mmio */
|
|
}
|
|
|
|
/**
|
|
* ata_dev_select - Select device 0/1 on ATA bus
|
|
* @ap: ATA channel to manipulate
|
|
* @device: ATA device (numbered from zero) to select
|
|
* @wait: non-zero to wait for Status register BSY bit to clear
|
|
* @can_sleep: non-zero if context allows sleeping
|
|
*
|
|
* Use the method defined in the ATA specification to
|
|
* make either device 0, or device 1, active on the
|
|
* ATA channel.
|
|
*
|
|
* This is a high-level version of ata_std_dev_select(),
|
|
* which additionally provides the services of inserting
|
|
* the proper pauses and status polling, where needed.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
|
|
void ata_dev_select(struct ata_port *ap, unsigned int device,
|
|
unsigned int wait, unsigned int can_sleep)
|
|
{
|
|
VPRINTK("ENTER, ata%u: device %u, wait %u\n",
|
|
ap->id, device, wait);
|
|
|
|
if (wait)
|
|
ata_wait_idle(ap);
|
|
|
|
ap->ops->dev_select(ap, device);
|
|
|
|
if (wait) {
|
|
if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI)
|
|
msleep(150);
|
|
ata_wait_idle(ap);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_dump_id - IDENTIFY DEVICE info debugging output
|
|
* @id: IDENTIFY DEVICE page to dump
|
|
*
|
|
* Dump selected 16-bit words from the given IDENTIFY DEVICE
|
|
* page.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
|
|
static inline void ata_dump_id(const u16 *id)
|
|
{
|
|
DPRINTK("49==0x%04x "
|
|
"53==0x%04x "
|
|
"63==0x%04x "
|
|
"64==0x%04x "
|
|
"75==0x%04x \n",
|
|
id[49],
|
|
id[53],
|
|
id[63],
|
|
id[64],
|
|
id[75]);
|
|
DPRINTK("80==0x%04x "
|
|
"81==0x%04x "
|
|
"82==0x%04x "
|
|
"83==0x%04x "
|
|
"84==0x%04x \n",
|
|
id[80],
|
|
id[81],
|
|
id[82],
|
|
id[83],
|
|
id[84]);
|
|
DPRINTK("88==0x%04x "
|
|
"93==0x%04x\n",
|
|
id[88],
|
|
id[93]);
|
|
}
|
|
|
|
/**
|
|
* ata_id_xfermask - Compute xfermask from the given IDENTIFY data
|
|
* @id: IDENTIFY data to compute xfer mask from
|
|
*
|
|
* Compute the xfermask 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 ?).
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*
|
|
* RETURNS:
|
|
* Computed xfermask
|
|
*/
|
|
static unsigned int ata_id_xfermask(const u16 *id)
|
|
{
|
|
unsigned int pio_mask, mwdma_mask, udma_mask;
|
|
|
|
/* Usual case. Word 53 indicates word 64 is valid */
|
|
if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
|
|
pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
|
|
pio_mask <<= 3;
|
|
pio_mask |= 0x7;
|
|
} else {
|
|
/* If word 64 isn't valid then Word 51 high byte holds
|
|
* the PIO timing number for the maximum. Turn it into
|
|
* a mask.
|
|
*/
|
|
pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
|
|
|
|
/* But wait.. there's more. Design your standards by
|
|
* committee and you too can get a free iordy field to
|
|
* process. However its the speeds not the modes that
|
|
* are supported... Note drivers using the timing API
|
|
* will get this right anyway
|
|
*/
|
|
}
|
|
|
|
mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
|
|
|
|
udma_mask = 0;
|
|
if (id[ATA_ID_FIELD_VALID] & (1 << 2))
|
|
udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
|
|
|
|
return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
|
|
}
|
|
|
|
/**
|
|
* ata_port_queue_task - Queue port_task
|
|
* @ap: The ata_port to queue port_task for
|
|
* @fn: workqueue function to be scheduled
|
|
* @data: data value to pass to workqueue function
|
|
* @delay: delay time for workqueue function
|
|
*
|
|
* Schedule @fn(@data) for execution after @delay jiffies using
|
|
* port_task. There is one port_task per port and it's the
|
|
* user(low level driver)'s responsibility to make sure that only
|
|
* one task is active at any given time.
|
|
*
|
|
* libata core layer takes care of synchronization between
|
|
* port_task and EH. ata_port_queue_task() may be ignored for EH
|
|
* synchronization.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
|
|
unsigned long delay)
|
|
{
|
|
int rc;
|
|
|
|
if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
|
|
return;
|
|
|
|
PREPARE_WORK(&ap->port_task, fn, data);
|
|
|
|
if (!delay)
|
|
rc = queue_work(ata_wq, &ap->port_task);
|
|
else
|
|
rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
|
|
|
|
/* rc == 0 means that another user is using port task */
|
|
WARN_ON(rc == 0);
|
|
}
|
|
|
|
/**
|
|
* ata_port_flush_task - Flush port_task
|
|
* @ap: The ata_port to flush port_task for
|
|
*
|
|
* After this function completes, port_task is guranteed not to
|
|
* be running or scheduled.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*/
|
|
void ata_port_flush_task(struct ata_port *ap)
|
|
{
|
|
unsigned long flags;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
spin_lock_irqsave(&ap->host_set->lock, flags);
|
|
ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
|
|
spin_unlock_irqrestore(&ap->host_set->lock, flags);
|
|
|
|
DPRINTK("flush #1\n");
|
|
flush_workqueue(ata_wq);
|
|
|
|
/*
|
|
* At this point, if a task is running, it's guaranteed to see
|
|
* the FLUSH flag; thus, it will never queue pio tasks again.
|
|
* Cancel and flush.
|
|
*/
|
|
if (!cancel_delayed_work(&ap->port_task)) {
|
|
DPRINTK("flush #2\n");
|
|
flush_workqueue(ata_wq);
|
|
}
|
|
|
|
spin_lock_irqsave(&ap->host_set->lock, flags);
|
|
ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
|
|
spin_unlock_irqrestore(&ap->host_set->lock, flags);
|
|
|
|
DPRINTK("EXIT\n");
|
|
}
|
|
|
|
void ata_qc_complete_internal(struct ata_queued_cmd *qc)
|
|
{
|
|
struct completion *waiting = qc->private_data;
|
|
|
|
qc->ap->ops->tf_read(qc->ap, &qc->tf);
|
|
complete(waiting);
|
|
}
|
|
|
|
/**
|
|
* ata_exec_internal - execute libata internal command
|
|
* @ap: Port to which the command is sent
|
|
* @dev: Device to which the command is sent
|
|
* @tf: Taskfile registers for the command and the result
|
|
* @dma_dir: Data tranfer direction of the command
|
|
* @buf: Data buffer of the command
|
|
* @buflen: Length of data buffer
|
|
*
|
|
* Executes libata internal command with timeout. @tf contains
|
|
* command on entry and result on return. Timeout and error
|
|
* conditions are reported via return value. No recovery action
|
|
* is taken after a command times out. It's caller's duty to
|
|
* clean up after timeout.
|
|
*
|
|
* LOCKING:
|
|
* None. Should be called with kernel context, might sleep.
|
|
*/
|
|
|
|
static unsigned
|
|
ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
|
|
struct ata_taskfile *tf,
|
|
int dma_dir, void *buf, unsigned int buflen)
|
|
{
|
|
u8 command = tf->command;
|
|
struct ata_queued_cmd *qc;
|
|
DECLARE_COMPLETION(wait);
|
|
unsigned long flags;
|
|
unsigned int err_mask;
|
|
|
|
spin_lock_irqsave(&ap->host_set->lock, flags);
|
|
|
|
qc = ata_qc_new_init(ap, dev);
|
|
BUG_ON(qc == NULL);
|
|
|
|
qc->tf = *tf;
|
|
qc->dma_dir = dma_dir;
|
|
if (dma_dir != DMA_NONE) {
|
|
ata_sg_init_one(qc, buf, buflen);
|
|
qc->nsect = buflen / ATA_SECT_SIZE;
|
|
}
|
|
|
|
qc->private_data = &wait;
|
|
qc->complete_fn = ata_qc_complete_internal;
|
|
|
|
ata_qc_issue(qc);
|
|
|
|
spin_unlock_irqrestore(&ap->host_set->lock, flags);
|
|
|
|
if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
|
|
ata_port_flush_task(ap);
|
|
|
|
spin_lock_irqsave(&ap->host_set->lock, flags);
|
|
|
|
/* We're racing with irq here. If we lose, the
|
|
* following test prevents us from completing the qc
|
|
* again. If completion irq occurs after here but
|
|
* before the caller cleans up, it will result in a
|
|
* spurious interrupt. We can live with that.
|
|
*/
|
|
if (qc->flags & ATA_QCFLAG_ACTIVE) {
|
|
qc->err_mask = AC_ERR_TIMEOUT;
|
|
ata_qc_complete(qc);
|
|
printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
|
|
ap->id, command);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ap->host_set->lock, flags);
|
|
}
|
|
|
|
*tf = qc->tf;
|
|
err_mask = qc->err_mask;
|
|
|
|
ata_qc_free(qc);
|
|
|
|
/* XXX - Some LLDDs (sata_mv) disable port on command failure.
|
|
* Until those drivers are fixed, we detect the condition
|
|
* here, fail the command with AC_ERR_SYSTEM and reenable the
|
|
* port.
|
|
*
|
|
* Note that this doesn't change any behavior as internal
|
|
* command failure results in disabling the device in the
|
|
* higher layer for LLDDs without new reset/EH callbacks.
|
|
*
|
|
* Kill the following code as soon as those drivers are fixed.
|
|
*/
|
|
if (ap->flags & ATA_FLAG_PORT_DISABLED) {
|
|
err_mask |= AC_ERR_SYSTEM;
|
|
ata_port_probe(ap);
|
|
}
|
|
|
|
return err_mask;
|
|
}
|
|
|
|
/**
|
|
* ata_pio_need_iordy - check if iordy needed
|
|
* @adev: ATA device
|
|
*
|
|
* Check if the current speed of the device requires IORDY. Used
|
|
* by various controllers for chip configuration.
|
|
*/
|
|
|
|
unsigned int ata_pio_need_iordy(const struct ata_device *adev)
|
|
{
|
|
int pio;
|
|
int speed = adev->pio_mode - XFER_PIO_0;
|
|
|
|
if (speed < 2)
|
|
return 0;
|
|
if (speed > 2)
|
|
return 1;
|
|
|
|
/* If we have no drive specific rule, then PIO 2 is non IORDY */
|
|
|
|
if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
|
|
pio = adev->id[ATA_ID_EIDE_PIO];
|
|
/* Is the speed faster than the drive allows non IORDY ? */
|
|
if (pio) {
|
|
/* This is cycle times not frequency - watch the logic! */
|
|
if (pio > 240) /* PIO2 is 240nS per cycle */
|
|
return 1;
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_dev_read_id - Read ID data from the specified device
|
|
* @ap: port on which target device resides
|
|
* @dev: target device
|
|
* @p_class: pointer to class of the target device (may be changed)
|
|
* @post_reset: is this read ID post-reset?
|
|
* @p_id: read IDENTIFY page (newly allocated)
|
|
*
|
|
* Read ID data from the specified device. ATA_CMD_ID_ATA is
|
|
* performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
|
|
* devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
|
|
* for pre-ATA4 drives.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise.
|
|
*/
|
|
static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
|
|
unsigned int *p_class, int post_reset, u16 **p_id)
|
|
{
|
|
unsigned int class = *p_class;
|
|
struct ata_taskfile tf;
|
|
unsigned int err_mask = 0;
|
|
u16 *id;
|
|
const char *reason;
|
|
int rc;
|
|
|
|
DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
|
|
|
|
ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
|
|
|
|
id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
|
|
if (id == NULL) {
|
|
rc = -ENOMEM;
|
|
reason = "out of memory";
|
|
goto err_out;
|
|
}
|
|
|
|
retry:
|
|
ata_tf_init(ap, &tf, dev->devno);
|
|
|
|
switch (class) {
|
|
case ATA_DEV_ATA:
|
|
tf.command = ATA_CMD_ID_ATA;
|
|
break;
|
|
case ATA_DEV_ATAPI:
|
|
tf.command = ATA_CMD_ID_ATAPI;
|
|
break;
|
|
default:
|
|
rc = -ENODEV;
|
|
reason = "unsupported class";
|
|
goto err_out;
|
|
}
|
|
|
|
tf.protocol = ATA_PROT_PIO;
|
|
|
|
err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
|
|
id, sizeof(id[0]) * ATA_ID_WORDS);
|
|
if (err_mask) {
|
|
rc = -EIO;
|
|
reason = "I/O error";
|
|
goto err_out;
|
|
}
|
|
|
|
swap_buf_le16(id, ATA_ID_WORDS);
|
|
|
|
/* sanity check */
|
|
if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) {
|
|
rc = -EINVAL;
|
|
reason = "device reports illegal type";
|
|
goto err_out;
|
|
}
|
|
|
|
if (post_reset && class == ATA_DEV_ATA) {
|
|
/*
|
|
* 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 (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
|
|
err_mask = ata_dev_init_params(ap, dev, id[3], id[6]);
|
|
if (err_mask) {
|
|
rc = -EIO;
|
|
reason = "INIT_DEV_PARAMS failed";
|
|
goto err_out;
|
|
}
|
|
|
|
/* current CHS translation info (id[53-58]) might be
|
|
* changed. reread the identify device info.
|
|
*/
|
|
post_reset = 0;
|
|
goto retry;
|
|
}
|
|
}
|
|
|
|
*p_class = class;
|
|
*p_id = id;
|
|
return 0;
|
|
|
|
err_out:
|
|
printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n",
|
|
ap->id, dev->devno, reason);
|
|
kfree(id);
|
|
return rc;
|
|
}
|
|
|
|
static inline u8 ata_dev_knobble(const struct ata_port *ap,
|
|
struct ata_device *dev)
|
|
{
|
|
return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
|
|
}
|
|
|
|
/**
|
|
* ata_dev_configure - Configure the specified ATA/ATAPI device
|
|
* @ap: Port on which target device resides
|
|
* @dev: Target device to configure
|
|
* @print_info: Enable device info printout
|
|
*
|
|
* Configure @dev according to @dev->id. Generic and low-level
|
|
* driver specific fixups are also applied.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise
|
|
*/
|
|
static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev,
|
|
int print_info)
|
|
{
|
|
const u16 *id = dev->id;
|
|
unsigned int xfer_mask;
|
|
int i, rc;
|
|
|
|
if (!ata_dev_present(dev)) {
|
|
DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
|
|
ap->id, dev->devno);
|
|
return 0;
|
|
}
|
|
|
|
DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
|
|
|
|
/* print device capabilities */
|
|
if (print_info)
|
|
printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
|
|
"84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
|
|
ap->id, dev->devno, id[49], id[82], id[83],
|
|
id[84], id[85], id[86], id[87], id[88]);
|
|
|
|
/* initialize to-be-configured parameters */
|
|
dev->flags = 0;
|
|
dev->max_sectors = 0;
|
|
dev->cdb_len = 0;
|
|
dev->n_sectors = 0;
|
|
dev->cylinders = 0;
|
|
dev->heads = 0;
|
|
dev->sectors = 0;
|
|
|
|
/*
|
|
* common ATA, ATAPI feature tests
|
|
*/
|
|
|
|
/* find max transfer mode; for printk only */
|
|
xfer_mask = ata_id_xfermask(id);
|
|
|
|
ata_dump_id(id);
|
|
|
|
/* ATA-specific feature tests */
|
|
if (dev->class == ATA_DEV_ATA) {
|
|
dev->n_sectors = ata_id_n_sectors(id);
|
|
|
|
if (ata_id_has_lba(id)) {
|
|
const char *lba_desc;
|
|
|
|
lba_desc = "LBA";
|
|
dev->flags |= ATA_DFLAG_LBA;
|
|
if (ata_id_has_lba48(id)) {
|
|
dev->flags |= ATA_DFLAG_LBA48;
|
|
lba_desc = "LBA48";
|
|
}
|
|
|
|
/* print device info to dmesg */
|
|
if (print_info)
|
|
printk(KERN_INFO "ata%u: dev %u ATA-%d, "
|
|
"max %s, %Lu sectors: %s\n",
|
|
ap->id, dev->devno,
|
|
ata_id_major_version(id),
|
|
ata_mode_string(xfer_mask),
|
|
(unsigned long long)dev->n_sectors,
|
|
lba_desc);
|
|
} else {
|
|
/* CHS */
|
|
|
|
/* Default translation */
|
|
dev->cylinders = id[1];
|
|
dev->heads = id[3];
|
|
dev->sectors = id[6];
|
|
|
|
if (ata_id_current_chs_valid(id)) {
|
|
/* Current CHS translation is valid. */
|
|
dev->cylinders = id[54];
|
|
dev->heads = id[55];
|
|
dev->sectors = id[56];
|
|
}
|
|
|
|
/* print device info to dmesg */
|
|
if (print_info)
|
|
printk(KERN_INFO "ata%u: dev %u ATA-%d, "
|
|
"max %s, %Lu sectors: CHS %u/%u/%u\n",
|
|
ap->id, dev->devno,
|
|
ata_id_major_version(id),
|
|
ata_mode_string(xfer_mask),
|
|
(unsigned long long)dev->n_sectors,
|
|
dev->cylinders, dev->heads, dev->sectors);
|
|
}
|
|
|
|
dev->cdb_len = 16;
|
|
}
|
|
|
|
/* ATAPI-specific feature tests */
|
|
else if (dev->class == ATA_DEV_ATAPI) {
|
|
rc = atapi_cdb_len(id);
|
|
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
|
|
printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
|
|
rc = -EINVAL;
|
|
goto err_out_nosup;
|
|
}
|
|
dev->cdb_len = (unsigned int) rc;
|
|
|
|
/* print device info to dmesg */
|
|
if (print_info)
|
|
printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
|
|
ap->id, dev->devno, ata_mode_string(xfer_mask));
|
|
}
|
|
|
|
ap->host->max_cmd_len = 0;
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
ap->host->max_cmd_len = max_t(unsigned int,
|
|
ap->host->max_cmd_len,
|
|
ap->device[i].cdb_len);
|
|
|
|
/* limit bridge transfers to udma5, 200 sectors */
|
|
if (ata_dev_knobble(ap, dev)) {
|
|
if (print_info)
|
|
printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
|
|
ap->id, dev->devno);
|
|
dev->udma_mask &= ATA_UDMA5;
|
|
dev->max_sectors = ATA_MAX_SECTORS;
|
|
}
|
|
|
|
if (ap->ops->dev_config)
|
|
ap->ops->dev_config(ap, dev);
|
|
|
|
DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
|
|
return 0;
|
|
|
|
err_out_nosup:
|
|
DPRINTK("EXIT, err\n");
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ata_bus_probe - Reset and probe ATA bus
|
|
* @ap: Bus to probe
|
|
*
|
|
* Master ATA bus probing function. Initiates a hardware-dependent
|
|
* bus reset, then attempts to identify any devices found on
|
|
* the bus.
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, non-zero on error.
|
|
*/
|
|
|
|
static int ata_bus_probe(struct ata_port *ap)
|
|
{
|
|
unsigned int classes[ATA_MAX_DEVICES];
|
|
unsigned int i, rc, found = 0;
|
|
|
|
ata_port_probe(ap);
|
|
|
|
/* reset and determine device classes */
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
classes[i] = ATA_DEV_UNKNOWN;
|
|
|
|
if (ap->ops->probe_reset) {
|
|
rc = ap->ops->probe_reset(ap, classes);
|
|
if (rc) {
|
|
printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
|
|
return rc;
|
|
}
|
|
} else {
|
|
ap->ops->phy_reset(ap);
|
|
|
|
if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
classes[i] = ap->device[i].class;
|
|
|
|
ata_port_probe(ap);
|
|
}
|
|
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
if (classes[i] == ATA_DEV_UNKNOWN)
|
|
classes[i] = ATA_DEV_NONE;
|
|
|
|
/* read IDENTIFY page and configure devices */
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
struct ata_device *dev = &ap->device[i];
|
|
|
|
dev->class = classes[i];
|
|
|
|
if (!ata_dev_present(dev))
|
|
continue;
|
|
|
|
WARN_ON(dev->id != NULL);
|
|
if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
|
|
dev->class = ATA_DEV_NONE;
|
|
continue;
|
|
}
|
|
|
|
if (ata_dev_configure(ap, dev, 1)) {
|
|
ata_dev_disable(ap, dev);
|
|
continue;
|
|
}
|
|
|
|
found = 1;
|
|
}
|
|
|
|
if (!found)
|
|
goto err_out_disable;
|
|
|
|
if (ap->ops->set_mode)
|
|
ap->ops->set_mode(ap);
|
|
else
|
|
ata_set_mode(ap);
|
|
|
|
if (ap->flags & ATA_FLAG_PORT_DISABLED)
|
|
goto err_out_disable;
|
|
|
|
return 0;
|
|
|
|
err_out_disable:
|
|
ap->ops->port_disable(ap);
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* ata_port_probe - Mark port as enabled
|
|
* @ap: Port for which we indicate enablement
|
|
*
|
|
* Modify @ap data structure such that the system
|
|
* thinks that the entire port is enabled.
|
|
*
|
|
* LOCKING: host_set lock, or some other form of
|
|
* serialization.
|
|
*/
|
|
|
|
void ata_port_probe(struct ata_port *ap)
|
|
{
|
|
ap->flags &= ~ATA_FLAG_PORT_DISABLED;
|
|
}
|
|
|
|
/**
|
|
* sata_print_link_status - Print SATA link status
|
|
* @ap: SATA port to printk link status about
|
|
*
|
|
* This function prints link speed and status of a SATA link.
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
static void sata_print_link_status(struct ata_port *ap)
|
|
{
|
|
u32 sstatus, tmp;
|
|
const char *speed;
|
|
|
|
if (!ap->ops->scr_read)
|
|
return;
|
|
|
|
sstatus = scr_read(ap, SCR_STATUS);
|
|
|
|
if (sata_dev_present(ap)) {
|
|
tmp = (sstatus >> 4) & 0xf;
|
|
if (tmp & (1 << 0))
|
|
speed = "1.5";
|
|
else if (tmp & (1 << 1))
|
|
speed = "3.0";
|
|
else
|
|
speed = "<unknown>";
|
|
printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
|
|
ap->id, speed, sstatus);
|
|
} else {
|
|
printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
|
|
ap->id, sstatus);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* __sata_phy_reset - Wake/reset a low-level SATA PHY
|
|
* @ap: SATA port associated with target SATA PHY.
|
|
*
|
|
* This function issues commands to standard SATA Sxxx
|
|
* PHY registers, to wake up the phy (and device), and
|
|
* clear any reset condition.
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*
|
|
*/
|
|
void __sata_phy_reset(struct ata_port *ap)
|
|
{
|
|
u32 sstatus;
|
|
unsigned long timeout = jiffies + (HZ * 5);
|
|
|
|
if (ap->flags & ATA_FLAG_SATA_RESET) {
|
|
/* issue phy wake/reset */
|
|
scr_write_flush(ap, SCR_CONTROL, 0x301);
|
|
/* Couldn't find anything in SATA I/II specs, but
|
|
* AHCI-1.1 10.4.2 says at least 1 ms. */
|
|
mdelay(1);
|
|
}
|
|
scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
|
|
|
|
/* wait for phy to become ready, if necessary */
|
|
do {
|
|
msleep(200);
|
|
sstatus = scr_read(ap, SCR_STATUS);
|
|
if ((sstatus & 0xf) != 1)
|
|
break;
|
|
} while (time_before(jiffies, timeout));
|
|
|
|
/* print link status */
|
|
sata_print_link_status(ap);
|
|
|
|
/* TODO: phy layer with polling, timeouts, etc. */
|
|
if (sata_dev_present(ap))
|
|
ata_port_probe(ap);
|
|
else
|
|
ata_port_disable(ap);
|
|
|
|
if (ap->flags & ATA_FLAG_PORT_DISABLED)
|
|
return;
|
|
|
|
if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
|
|
ata_port_disable(ap);
|
|
return;
|
|
}
|
|
|
|
ap->cbl = ATA_CBL_SATA;
|
|
}
|
|
|
|
/**
|
|
* sata_phy_reset - Reset SATA bus.
|
|
* @ap: SATA port associated with target SATA PHY.
|
|
*
|
|
* This function resets the SATA bus, and then probes
|
|
* the bus for devices.
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*
|
|
*/
|
|
void sata_phy_reset(struct ata_port *ap)
|
|
{
|
|
__sata_phy_reset(ap);
|
|
if (ap->flags & ATA_FLAG_PORT_DISABLED)
|
|
return;
|
|
ata_bus_reset(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_dev_pair - return other device on cable
|
|
* @ap: port
|
|
* @adev: device
|
|
*
|
|
* Obtain the other device on the same cable, or if none is
|
|
* present NULL is returned
|
|
*/
|
|
|
|
struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
|
|
{
|
|
struct ata_device *pair = &ap->device[1 - adev->devno];
|
|
if (!ata_dev_present(pair))
|
|
return NULL;
|
|
return pair;
|
|
}
|
|
|
|
/**
|
|
* ata_port_disable - Disable port.
|
|
* @ap: Port to be disabled.
|
|
*
|
|
* Modify @ap data structure such that the system
|
|
* thinks that the entire port is disabled, and should
|
|
* never attempt to probe or communicate with devices
|
|
* on this port.
|
|
*
|
|
* LOCKING: host_set lock, or some other form of
|
|
* serialization.
|
|
*/
|
|
|
|
void ata_port_disable(struct ata_port *ap)
|
|
{
|
|
ap->device[0].class = ATA_DEV_NONE;
|
|
ap->device[1].class = ATA_DEV_NONE;
|
|
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;
|
|
|
|
memcpy(t, s, sizeof(*s));
|
|
|
|
/*
|
|
* 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(t, 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);
|
|
}
|
|
|
|
/*
|
|
* Lengthen 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 int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
|
|
{
|
|
unsigned int err_mask;
|
|
int rc;
|
|
|
|
if (dev->xfer_shift == ATA_SHIFT_PIO)
|
|
dev->flags |= ATA_DFLAG_PIO;
|
|
|
|
err_mask = ata_dev_set_xfermode(ap, dev);
|
|
if (err_mask) {
|
|
printk(KERN_ERR
|
|
"ata%u: failed to set xfermode (err_mask=0x%x)\n",
|
|
ap->id, err_mask);
|
|
return -EIO;
|
|
}
|
|
|
|
rc = ata_dev_revalidate(ap, dev, 0);
|
|
if (rc) {
|
|
printk(KERN_ERR
|
|
"ata%u: failed to revalidate after set xfermode\n",
|
|
ap->id);
|
|
return rc;
|
|
}
|
|
|
|
DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
|
|
dev->xfer_shift, (int)dev->xfer_mode);
|
|
|
|
printk(KERN_INFO "ata%u: dev %u configured for %s\n",
|
|
ap->id, dev->devno,
|
|
ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
|
|
return 0;
|
|
}
|
|
|
|
static int ata_host_set_pio(struct ata_port *ap)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
struct ata_device *dev = &ap->device[i];
|
|
|
|
if (!ata_dev_present(dev))
|
|
continue;
|
|
|
|
if (!dev->pio_mode) {
|
|
printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i);
|
|
return -1;
|
|
}
|
|
|
|
dev->xfer_mode = dev->pio_mode;
|
|
dev->xfer_shift = ATA_SHIFT_PIO;
|
|
if (ap->ops->set_piomode)
|
|
ap->ops->set_piomode(ap, dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ata_host_set_dma(struct ata_port *ap)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
struct ata_device *dev = &ap->device[i];
|
|
|
|
if (!ata_dev_present(dev) || !dev->dma_mode)
|
|
continue;
|
|
|
|
dev->xfer_mode = dev->dma_mode;
|
|
dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
|
|
if (ap->ops->set_dmamode)
|
|
ap->ops->set_dmamode(ap, dev);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_set_mode - Program timings and issue SET FEATURES - XFER
|
|
* @ap: port on which timings will be programmed
|
|
*
|
|
* Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*/
|
|
static void ata_set_mode(struct ata_port *ap)
|
|
{
|
|
int i, rc, used_dma = 0;
|
|
|
|
/* step 1: calculate xfer_mask */
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
struct ata_device *dev = &ap->device[i];
|
|
unsigned int pio_mask, dma_mask;
|
|
|
|
if (!ata_dev_present(dev))
|
|
continue;
|
|
|
|
ata_dev_xfermask(ap, dev);
|
|
|
|
/* TODO: let LLDD filter dev->*_mask here */
|
|
|
|
pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
|
|
dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
|
|
dev->pio_mode = ata_xfer_mask2mode(pio_mask);
|
|
dev->dma_mode = ata_xfer_mask2mode(dma_mask);
|
|
|
|
if (dev->dma_mode)
|
|
used_dma = 1;
|
|
}
|
|
|
|
/* step 2: always set host PIO timings */
|
|
rc = ata_host_set_pio(ap);
|
|
if (rc)
|
|
goto err_out;
|
|
|
|
/* step 3: set host DMA timings */
|
|
ata_host_set_dma(ap);
|
|
|
|
/* step 4: update devices' xfer mode */
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
struct ata_device *dev = &ap->device[i];
|
|
|
|
if (!ata_dev_present(dev))
|
|
continue;
|
|
|
|
if (ata_dev_set_mode(ap, dev))
|
|
goto err_out;
|
|
}
|
|
|
|
/*
|
|
* Record simplex status. If we selected DMA then the other
|
|
* host channels are not permitted to do so.
|
|
*/
|
|
|
|
if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
|
|
ap->host_set->simplex_claimed = 1;
|
|
|
|
/*
|
|
* Chip specific finalisation
|
|
*/
|
|
if (ap->ops->post_set_mode)
|
|
ap->ops->post_set_mode(ap);
|
|
|
|
return;
|
|
|
|
err_out:
|
|
ata_port_disable(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_tf_to_host - issue ATA taskfile to host controller
|
|
* @ap: port to which command is being issued
|
|
* @tf: ATA taskfile register set
|
|
*
|
|
* Issues ATA taskfile register set to ATA host controller,
|
|
* with proper synchronization with interrupt handler and
|
|
* other threads.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
static inline void ata_tf_to_host(struct ata_port *ap,
|
|
const struct ata_taskfile *tf)
|
|
{
|
|
ap->ops->tf_load(ap, tf);
|
|
ap->ops->exec_command(ap, tf);
|
|
}
|
|
|
|
/**
|
|
* ata_busy_sleep - sleep until BSY clears, or timeout
|
|
* @ap: port containing status register to be polled
|
|
* @tmout_pat: impatience timeout
|
|
* @tmout: overall timeout
|
|
*
|
|
* Sleep until ATA Status register bit BSY clears,
|
|
* or a timeout occurs.
|
|
*
|
|
* LOCKING: None.
|
|
*/
|
|
|
|
unsigned int ata_busy_sleep (struct ata_port *ap,
|
|
unsigned long tmout_pat, unsigned long tmout)
|
|
{
|
|
unsigned long timer_start, timeout;
|
|
u8 status;
|
|
|
|
status = ata_busy_wait(ap, ATA_BUSY, 300);
|
|
timer_start = jiffies;
|
|
timeout = timer_start + tmout_pat;
|
|
while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
|
|
msleep(50);
|
|
status = ata_busy_wait(ap, ATA_BUSY, 3);
|
|
}
|
|
|
|
if (status & ATA_BUSY)
|
|
printk(KERN_WARNING "ata%u is slow to respond, "
|
|
"please be patient\n", ap->id);
|
|
|
|
timeout = timer_start + tmout;
|
|
while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
|
|
msleep(50);
|
|
status = ata_chk_status(ap);
|
|
}
|
|
|
|
if (status & ATA_BUSY) {
|
|
printk(KERN_ERR "ata%u failed to respond (%lu secs)\n",
|
|
ap->id, tmout / HZ);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask)
|
|
{
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
unsigned int dev0 = devmask & (1 << 0);
|
|
unsigned int dev1 = devmask & (1 << 1);
|
|
unsigned long timeout;
|
|
|
|
/* if device 0 was found in ata_devchk, wait for its
|
|
* BSY bit to clear
|
|
*/
|
|
if (dev0)
|
|
ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
|
|
|
|
/* if device 1 was found in ata_devchk, wait for
|
|
* register access, then wait for BSY to clear
|
|
*/
|
|
timeout = jiffies + ATA_TMOUT_BOOT;
|
|
while (dev1) {
|
|
u8 nsect, lbal;
|
|
|
|
ap->ops->dev_select(ap, 1);
|
|
if (ap->flags & ATA_FLAG_MMIO) {
|
|
nsect = readb((void __iomem *) ioaddr->nsect_addr);
|
|
lbal = readb((void __iomem *) ioaddr->lbal_addr);
|
|
} else {
|
|
nsect = inb(ioaddr->nsect_addr);
|
|
lbal = inb(ioaddr->lbal_addr);
|
|
}
|
|
if ((nsect == 1) && (lbal == 1))
|
|
break;
|
|
if (time_after(jiffies, timeout)) {
|
|
dev1 = 0;
|
|
break;
|
|
}
|
|
msleep(50); /* give drive a breather */
|
|
}
|
|
if (dev1)
|
|
ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
|
|
|
|
/* is all this really necessary? */
|
|
ap->ops->dev_select(ap, 0);
|
|
if (dev1)
|
|
ap->ops->dev_select(ap, 1);
|
|
if (dev0)
|
|
ap->ops->dev_select(ap, 0);
|
|
}
|
|
|
|
static unsigned int ata_bus_softreset(struct ata_port *ap,
|
|
unsigned int devmask)
|
|
{
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
|
|
DPRINTK("ata%u: bus reset via SRST\n", ap->id);
|
|
|
|
/* software reset. causes dev0 to be selected */
|
|
if (ap->flags & ATA_FLAG_MMIO) {
|
|
writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
|
|
udelay(20); /* FIXME: flush */
|
|
writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr);
|
|
udelay(20); /* FIXME: flush */
|
|
writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
|
|
} else {
|
|
outb(ap->ctl, ioaddr->ctl_addr);
|
|
udelay(10);
|
|
outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
|
|
udelay(10);
|
|
outb(ap->ctl, ioaddr->ctl_addr);
|
|
}
|
|
|
|
/* spec mandates ">= 2ms" before checking status.
|
|
* We wait 150ms, because that was the magic delay used for
|
|
* ATAPI devices in Hale Landis's ATADRVR, for the period of time
|
|
* between when the ATA command register is written, and then
|
|
* status is checked. Because waiting for "a while" before
|
|
* checking status is fine, post SRST, we perform this magic
|
|
* delay here as well.
|
|
*
|
|
* Old drivers/ide uses the 2mS rule and then waits for ready
|
|
*/
|
|
msleep(150);
|
|
|
|
/* Before we perform post reset processing we want to see if
|
|
* the bus shows 0xFF because the odd clown forgets the D7
|
|
* pulldown resistor.
|
|
*/
|
|
if (ata_check_status(ap) == 0xFF)
|
|
return AC_ERR_OTHER;
|
|
|
|
ata_bus_post_reset(ap, devmask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_bus_reset - reset host port and associated ATA channel
|
|
* @ap: port to reset
|
|
*
|
|
* This is typically the first time we actually start issuing
|
|
* commands to the ATA channel. We wait for BSY to clear, then
|
|
* issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
|
|
* result. Determine what devices, if any, are on the channel
|
|
* by looking at the device 0/1 error register. Look at the signature
|
|
* stored in each device's taskfile registers, to determine if
|
|
* the device is ATA or ATAPI.
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
* Obtains host_set lock.
|
|
*
|
|
* SIDE EFFECTS:
|
|
* Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
|
|
*/
|
|
|
|
void ata_bus_reset(struct ata_port *ap)
|
|
{
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
|
|
u8 err;
|
|
unsigned int dev0, dev1 = 0, devmask = 0;
|
|
|
|
DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no);
|
|
|
|
/* determine if device 0/1 are present */
|
|
if (ap->flags & ATA_FLAG_SATA_RESET)
|
|
dev0 = 1;
|
|
else {
|
|
dev0 = ata_devchk(ap, 0);
|
|
if (slave_possible)
|
|
dev1 = ata_devchk(ap, 1);
|
|
}
|
|
|
|
if (dev0)
|
|
devmask |= (1 << 0);
|
|
if (dev1)
|
|
devmask |= (1 << 1);
|
|
|
|
/* select device 0 again */
|
|
ap->ops->dev_select(ap, 0);
|
|
|
|
/* issue bus reset */
|
|
if (ap->flags & ATA_FLAG_SRST)
|
|
if (ata_bus_softreset(ap, devmask))
|
|
goto err_out;
|
|
|
|
/*
|
|
* determine by signature whether we have ATA or ATAPI devices
|
|
*/
|
|
ap->device[0].class = ata_dev_try_classify(ap, 0, &err);
|
|
if ((slave_possible) && (err != 0x81))
|
|
ap->device[1].class = ata_dev_try_classify(ap, 1, &err);
|
|
|
|
/* re-enable interrupts */
|
|
if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
|
|
ata_irq_on(ap);
|
|
|
|
/* is double-select really necessary? */
|
|
if (ap->device[1].class != ATA_DEV_NONE)
|
|
ap->ops->dev_select(ap, 1);
|
|
if (ap->device[0].class != ATA_DEV_NONE)
|
|
ap->ops->dev_select(ap, 0);
|
|
|
|
/* if no devices were detected, disable this port */
|
|
if ((ap->device[0].class == ATA_DEV_NONE) &&
|
|
(ap->device[1].class == ATA_DEV_NONE))
|
|
goto err_out;
|
|
|
|
if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
|
|
/* set up device control for ATA_FLAG_SATA_RESET */
|
|
if (ap->flags & ATA_FLAG_MMIO)
|
|
writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
|
|
else
|
|
outb(ap->ctl, ioaddr->ctl_addr);
|
|
}
|
|
|
|
DPRINTK("EXIT\n");
|
|
return;
|
|
|
|
err_out:
|
|
printk(KERN_ERR "ata%u: disabling port\n", ap->id);
|
|
ap->ops->port_disable(ap);
|
|
|
|
DPRINTK("EXIT\n");
|
|
}
|
|
|
|
static int sata_phy_resume(struct ata_port *ap)
|
|
{
|
|
unsigned long timeout = jiffies + (HZ * 5);
|
|
u32 sstatus;
|
|
|
|
scr_write_flush(ap, SCR_CONTROL, 0x300);
|
|
|
|
/* Wait for phy to become ready, if necessary. */
|
|
do {
|
|
msleep(200);
|
|
sstatus = scr_read(ap, SCR_STATUS);
|
|
if ((sstatus & 0xf) != 1)
|
|
return 0;
|
|
} while (time_before(jiffies, timeout));
|
|
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* ata_std_probeinit - initialize probing
|
|
* @ap: port to be probed
|
|
*
|
|
* @ap is about to be probed. Initialize it. This function is
|
|
* to be used as standard callback for ata_drive_probe_reset().
|
|
*
|
|
* NOTE!!! Do not use this function as probeinit if a low level
|
|
* driver implements only hardreset. Just pass NULL as probeinit
|
|
* in that case. Using this function is probably okay but doing
|
|
* so makes reset sequence different from the original
|
|
* ->phy_reset implementation and Jeff nervous. :-P
|
|
*/
|
|
void ata_std_probeinit(struct ata_port *ap)
|
|
{
|
|
if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) {
|
|
sata_phy_resume(ap);
|
|
if (sata_dev_present(ap))
|
|
ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_std_softreset - reset host port via ATA SRST
|
|
* @ap: port to reset
|
|
* @verbose: fail verbosely
|
|
* @classes: resulting classes of attached devices
|
|
*
|
|
* Reset host port using ATA SRST. This function is to be used
|
|
* as standard callback for ata_drive_*_reset() functions.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise.
|
|
*/
|
|
int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes)
|
|
{
|
|
unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
|
|
unsigned int devmask = 0, err_mask;
|
|
u8 err;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
if (ap->ops->scr_read && !sata_dev_present(ap)) {
|
|
classes[0] = ATA_DEV_NONE;
|
|
goto out;
|
|
}
|
|
|
|
/* determine if device 0/1 are present */
|
|
if (ata_devchk(ap, 0))
|
|
devmask |= (1 << 0);
|
|
if (slave_possible && ata_devchk(ap, 1))
|
|
devmask |= (1 << 1);
|
|
|
|
/* select device 0 again */
|
|
ap->ops->dev_select(ap, 0);
|
|
|
|
/* issue bus reset */
|
|
DPRINTK("about to softreset, devmask=%x\n", devmask);
|
|
err_mask = ata_bus_softreset(ap, devmask);
|
|
if (err_mask) {
|
|
if (verbose)
|
|
printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n",
|
|
ap->id, err_mask);
|
|
else
|
|
DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
|
|
err_mask);
|
|
return -EIO;
|
|
}
|
|
|
|
/* determine by signature whether we have ATA or ATAPI devices */
|
|
classes[0] = ata_dev_try_classify(ap, 0, &err);
|
|
if (slave_possible && err != 0x81)
|
|
classes[1] = ata_dev_try_classify(ap, 1, &err);
|
|
|
|
out:
|
|
DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sata_std_hardreset - reset host port via SATA phy reset
|
|
* @ap: port to reset
|
|
* @verbose: fail verbosely
|
|
* @class: resulting class of attached device
|
|
*
|
|
* SATA phy-reset host port using DET bits of SControl register.
|
|
* This function is to be used as standard callback for
|
|
* ata_drive_*_reset().
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise.
|
|
*/
|
|
int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
|
|
{
|
|
DPRINTK("ENTER\n");
|
|
|
|
/* Issue phy wake/reset */
|
|
scr_write_flush(ap, SCR_CONTROL, 0x301);
|
|
|
|
/*
|
|
* Couldn't find anything in SATA I/II specs, but AHCI-1.1
|
|
* 10.4.2 says at least 1 ms.
|
|
*/
|
|
msleep(1);
|
|
|
|
/* Bring phy back */
|
|
sata_phy_resume(ap);
|
|
|
|
/* TODO: phy layer with polling, timeouts, etc. */
|
|
if (!sata_dev_present(ap)) {
|
|
*class = ATA_DEV_NONE;
|
|
DPRINTK("EXIT, link offline\n");
|
|
return 0;
|
|
}
|
|
|
|
if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
|
|
if (verbose)
|
|
printk(KERN_ERR "ata%u: COMRESET failed "
|
|
"(device not ready)\n", ap->id);
|
|
else
|
|
DPRINTK("EXIT, device not ready\n");
|
|
return -EIO;
|
|
}
|
|
|
|
ap->ops->dev_select(ap, 0); /* probably unnecessary */
|
|
|
|
*class = ata_dev_try_classify(ap, 0, NULL);
|
|
|
|
DPRINTK("EXIT, class=%u\n", *class);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_std_postreset - standard postreset callback
|
|
* @ap: the target ata_port
|
|
* @classes: classes of attached devices
|
|
*
|
|
* This function is invoked after a successful reset. Note that
|
|
* the device might have been reset more than once using
|
|
* different reset methods before postreset is invoked.
|
|
*
|
|
* This function is to be used as standard callback for
|
|
* ata_drive_*_reset().
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*/
|
|
void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
|
|
{
|
|
DPRINTK("ENTER\n");
|
|
|
|
/* set cable type if it isn't already set */
|
|
if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA)
|
|
ap->cbl = ATA_CBL_SATA;
|
|
|
|
/* print link status */
|
|
if (ap->cbl == ATA_CBL_SATA)
|
|
sata_print_link_status(ap);
|
|
|
|
/* re-enable interrupts */
|
|
if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
|
|
ata_irq_on(ap);
|
|
|
|
/* is double-select really necessary? */
|
|
if (classes[0] != ATA_DEV_NONE)
|
|
ap->ops->dev_select(ap, 1);
|
|
if (classes[1] != ATA_DEV_NONE)
|
|
ap->ops->dev_select(ap, 0);
|
|
|
|
/* bail out if no device is present */
|
|
if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
|
|
DPRINTK("EXIT, no device\n");
|
|
return;
|
|
}
|
|
|
|
/* set up device control */
|
|
if (ap->ioaddr.ctl_addr) {
|
|
if (ap->flags & ATA_FLAG_MMIO)
|
|
writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr);
|
|
else
|
|
outb(ap->ctl, ap->ioaddr.ctl_addr);
|
|
}
|
|
|
|
DPRINTK("EXIT\n");
|
|
}
|
|
|
|
/**
|
|
* ata_std_probe_reset - standard probe reset method
|
|
* @ap: prot to perform probe-reset
|
|
* @classes: resulting classes of attached devices
|
|
*
|
|
* The stock off-the-shelf ->probe_reset method.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -errno otherwise.
|
|
*/
|
|
int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
|
|
{
|
|
ata_reset_fn_t hardreset;
|
|
|
|
hardreset = NULL;
|
|
if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
|
|
hardreset = sata_std_hardreset;
|
|
|
|
return ata_drive_probe_reset(ap, ata_std_probeinit,
|
|
ata_std_softreset, hardreset,
|
|
ata_std_postreset, classes);
|
|
}
|
|
|
|
static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset,
|
|
ata_postreset_fn_t postreset,
|
|
unsigned int *classes)
|
|
{
|
|
int i, rc;
|
|
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
classes[i] = ATA_DEV_UNKNOWN;
|
|
|
|
rc = reset(ap, 0, classes);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* If any class isn't ATA_DEV_UNKNOWN, consider classification
|
|
* is complete and convert all ATA_DEV_UNKNOWN to
|
|
* ATA_DEV_NONE.
|
|
*/
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
if (classes[i] != ATA_DEV_UNKNOWN)
|
|
break;
|
|
|
|
if (i < ATA_MAX_DEVICES)
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
if (classes[i] == ATA_DEV_UNKNOWN)
|
|
classes[i] = ATA_DEV_NONE;
|
|
|
|
if (postreset)
|
|
postreset(ap, classes);
|
|
|
|
return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV;
|
|
}
|
|
|
|
/**
|
|
* ata_drive_probe_reset - Perform probe reset with given methods
|
|
* @ap: port to reset
|
|
* @probeinit: probeinit method (can be NULL)
|
|
* @softreset: softreset method (can be NULL)
|
|
* @hardreset: hardreset method (can be NULL)
|
|
* @postreset: postreset method (can be NULL)
|
|
* @classes: resulting classes of attached devices
|
|
*
|
|
* Reset the specified port and classify attached devices using
|
|
* given methods. This function prefers softreset but tries all
|
|
* possible reset sequences to reset and classify devices. This
|
|
* function is intended to be used for constructing ->probe_reset
|
|
* callback by low level drivers.
|
|
*
|
|
* Reset methods should follow the following rules.
|
|
*
|
|
* - Return 0 on sucess, -errno on failure.
|
|
* - If classification is supported, fill classes[] with
|
|
* recognized class codes.
|
|
* - If classification is not supported, leave classes[] alone.
|
|
* - If verbose is non-zero, print error message on failure;
|
|
* otherwise, shut up.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
|
|
* if classification fails, and any error code from reset
|
|
* methods.
|
|
*/
|
|
int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
|
|
ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
|
|
ata_postreset_fn_t postreset, unsigned int *classes)
|
|
{
|
|
int rc = -EINVAL;
|
|
|
|
if (probeinit)
|
|
probeinit(ap);
|
|
|
|
if (softreset) {
|
|
rc = do_probe_reset(ap, softreset, postreset, classes);
|
|
if (rc == 0)
|
|
return 0;
|
|
}
|
|
|
|
if (!hardreset)
|
|
return rc;
|
|
|
|
rc = do_probe_reset(ap, hardreset, postreset, classes);
|
|
if (rc == 0 || rc != -ENODEV)
|
|
return rc;
|
|
|
|
if (softreset)
|
|
rc = do_probe_reset(ap, softreset, postreset, classes);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ata_dev_same_device - Determine whether new ID matches configured device
|
|
* @ap: port on which the device to compare against resides
|
|
* @dev: device to compare against
|
|
* @new_class: class of the new device
|
|
* @new_id: IDENTIFY page of the new device
|
|
*
|
|
* Compare @new_class and @new_id against @dev and determine
|
|
* whether @dev is the device indicated by @new_class and
|
|
* @new_id.
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*
|
|
* RETURNS:
|
|
* 1 if @dev matches @new_class and @new_id, 0 otherwise.
|
|
*/
|
|
static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev,
|
|
unsigned int new_class, const u16 *new_id)
|
|
{
|
|
const u16 *old_id = dev->id;
|
|
unsigned char model[2][41], serial[2][21];
|
|
u64 new_n_sectors;
|
|
|
|
if (dev->class != new_class) {
|
|
printk(KERN_INFO
|
|
"ata%u: dev %u class mismatch %d != %d\n",
|
|
ap->id, dev->devno, dev->class, new_class);
|
|
return 0;
|
|
}
|
|
|
|
ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
|
|
ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
|
|
ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
|
|
ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
|
|
new_n_sectors = ata_id_n_sectors(new_id);
|
|
|
|
if (strcmp(model[0], model[1])) {
|
|
printk(KERN_INFO
|
|
"ata%u: dev %u model number mismatch '%s' != '%s'\n",
|
|
ap->id, dev->devno, model[0], model[1]);
|
|
return 0;
|
|
}
|
|
|
|
if (strcmp(serial[0], serial[1])) {
|
|
printk(KERN_INFO
|
|
"ata%u: dev %u serial number mismatch '%s' != '%s'\n",
|
|
ap->id, dev->devno, serial[0], serial[1]);
|
|
return 0;
|
|
}
|
|
|
|
if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
|
|
printk(KERN_INFO
|
|
"ata%u: dev %u n_sectors mismatch %llu != %llu\n",
|
|
ap->id, dev->devno, (unsigned long long)dev->n_sectors,
|
|
(unsigned long long)new_n_sectors);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* ata_dev_revalidate - Revalidate ATA device
|
|
* @ap: port on which the device to revalidate resides
|
|
* @dev: device to revalidate
|
|
* @post_reset: is this revalidation after reset?
|
|
*
|
|
* Re-read IDENTIFY page and make sure @dev is still attached to
|
|
* the port.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, negative errno otherwise
|
|
*/
|
|
int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
|
|
int post_reset)
|
|
{
|
|
unsigned int class;
|
|
u16 *id;
|
|
int rc;
|
|
|
|
if (!ata_dev_present(dev))
|
|
return -ENODEV;
|
|
|
|
class = dev->class;
|
|
id = NULL;
|
|
|
|
/* allocate & read ID data */
|
|
rc = ata_dev_read_id(ap, dev, &class, post_reset, &id);
|
|
if (rc)
|
|
goto fail;
|
|
|
|
/* is the device still there? */
|
|
if (!ata_dev_same_device(ap, dev, class, id)) {
|
|
rc = -ENODEV;
|
|
goto fail;
|
|
}
|
|
|
|
kfree(dev->id);
|
|
dev->id = id;
|
|
|
|
/* configure device according to the new ID */
|
|
return ata_dev_configure(ap, dev, 0);
|
|
|
|
fail:
|
|
printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n",
|
|
ap->id, dev->devno, rc);
|
|
kfree(id);
|
|
return rc;
|
|
}
|
|
|
|
static const char * const ata_dma_blacklist [] = {
|
|
"WDC AC11000H", NULL,
|
|
"WDC AC22100H", NULL,
|
|
"WDC AC32500H", NULL,
|
|
"WDC AC33100H", NULL,
|
|
"WDC AC31600H", NULL,
|
|
"WDC AC32100H", "24.09P07",
|
|
"WDC AC23200L", "21.10N21",
|
|
"Compaq CRD-8241B", NULL,
|
|
"CRD-8400B", NULL,
|
|
"CRD-8480B", NULL,
|
|
"CRD-8482B", NULL,
|
|
"CRD-84", NULL,
|
|
"SanDisk SDP3B", NULL,
|
|
"SanDisk SDP3B-64", NULL,
|
|
"SANYO CD-ROM CRD", NULL,
|
|
"HITACHI CDR-8", NULL,
|
|
"HITACHI CDR-8335", NULL,
|
|
"HITACHI CDR-8435", NULL,
|
|
"Toshiba CD-ROM XM-6202B", NULL,
|
|
"TOSHIBA CD-ROM XM-1702BC", NULL,
|
|
"CD-532E-A", NULL,
|
|
"E-IDE CD-ROM CR-840", NULL,
|
|
"CD-ROM Drive/F5A", NULL,
|
|
"WPI CDD-820", NULL,
|
|
"SAMSUNG CD-ROM SC-148C", NULL,
|
|
"SAMSUNG CD-ROM SC", NULL,
|
|
"SanDisk SDP3B-64", NULL,
|
|
"ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
|
|
"_NEC DV5800A", NULL,
|
|
"SAMSUNG CD-ROM SN-124", "N001"
|
|
};
|
|
|
|
static int ata_strim(char *s, size_t len)
|
|
{
|
|
len = strnlen(s, len);
|
|
|
|
/* ATAPI specifies that empty space is blank-filled; remove blanks */
|
|
while ((len > 0) && (s[len - 1] == ' ')) {
|
|
len--;
|
|
s[len] = 0;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static int ata_dma_blacklisted(const struct ata_device *dev)
|
|
{
|
|
unsigned char model_num[40];
|
|
unsigned char model_rev[16];
|
|
unsigned int nlen, rlen;
|
|
int i;
|
|
|
|
ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
|
|
sizeof(model_num));
|
|
ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
|
|
sizeof(model_rev));
|
|
nlen = ata_strim(model_num, sizeof(model_num));
|
|
rlen = ata_strim(model_rev, sizeof(model_rev));
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
|
|
if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
|
|
if (ata_dma_blacklist[i+1] == NULL)
|
|
return 1;
|
|
if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_dev_xfermask - Compute supported xfermask of the given device
|
|
* @ap: Port on which the device to compute xfermask for resides
|
|
* @dev: Device to compute xfermask for
|
|
*
|
|
* Compute supported xfermask of @dev and store it in
|
|
* dev->*_mask. This function is responsible for applying all
|
|
* known limits including host controller limits, device
|
|
* blacklist, etc...
|
|
*
|
|
* FIXME: The current implementation limits all transfer modes to
|
|
* the fastest of the lowested device on the port. This is not
|
|
* required on most controllers.
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
|
|
{
|
|
struct ata_host_set *hs = ap->host_set;
|
|
unsigned long xfer_mask;
|
|
int i;
|
|
|
|
xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
|
|
ap->udma_mask);
|
|
|
|
/* FIXME: Use port-wide xfermask for now */
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
struct ata_device *d = &ap->device[i];
|
|
if (!ata_dev_present(d))
|
|
continue;
|
|
xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
|
|
d->udma_mask);
|
|
xfer_mask &= ata_id_xfermask(d->id);
|
|
if (ata_dma_blacklisted(d))
|
|
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
|
|
/* Apply cable rule here. Don't apply it early because when
|
|
we handle hot plug the cable type can itself change */
|
|
if (ap->cbl == ATA_CBL_PATA40)
|
|
xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
|
|
}
|
|
|
|
if (ata_dma_blacklisted(dev))
|
|
printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
|
|
"disabling DMA\n", ap->id, dev->devno);
|
|
|
|
if (hs->flags & ATA_HOST_SIMPLEX) {
|
|
if (hs->simplex_claimed)
|
|
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
|
|
}
|
|
if (ap->ops->mode_filter)
|
|
xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
|
|
|
|
ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
|
|
&dev->udma_mask);
|
|
}
|
|
|
|
/**
|
|
* ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
|
|
* @ap: Port associated with device @dev
|
|
* @dev: Device to which command will be sent
|
|
*
|
|
* Issue SET FEATURES - XFER MODE command to device @dev
|
|
* on port @ap.
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, AC_ERR_* mask otherwise.
|
|
*/
|
|
|
|
static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
|
|
struct ata_device *dev)
|
|
{
|
|
struct ata_taskfile tf;
|
|
unsigned int err_mask;
|
|
|
|
/* set up set-features taskfile */
|
|
DPRINTK("set features - xfer mode\n");
|
|
|
|
ata_tf_init(ap, &tf, dev->devno);
|
|
tf.command = ATA_CMD_SET_FEATURES;
|
|
tf.feature = SETFEATURES_XFER;
|
|
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
|
|
tf.protocol = ATA_PROT_NODATA;
|
|
tf.nsect = dev->xfer_mode;
|
|
|
|
err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
|
|
|
|
DPRINTK("EXIT, err_mask=%x\n", err_mask);
|
|
return err_mask;
|
|
}
|
|
|
|
/**
|
|
* ata_dev_init_params - Issue INIT DEV PARAMS command
|
|
* @ap: Port associated with device @dev
|
|
* @dev: Device to which command will be sent
|
|
* @heads: Number of heads (taskfile parameter)
|
|
* @sectors: Number of sectors (taskfile parameter)
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, AC_ERR_* mask otherwise.
|
|
*/
|
|
|
|
static unsigned int ata_dev_init_params(struct ata_port *ap,
|
|
struct ata_device *dev,
|
|
u16 heads,
|
|
u16 sectors)
|
|
{
|
|
struct ata_taskfile tf;
|
|
unsigned int err_mask;
|
|
|
|
/* Number of sectors per track 1-255. Number of heads 1-16 */
|
|
if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
|
|
return AC_ERR_INVALID;
|
|
|
|
/* set up init dev params taskfile */
|
|
DPRINTK("init dev params \n");
|
|
|
|
ata_tf_init(ap, &tf, dev->devno);
|
|
tf.command = ATA_CMD_INIT_DEV_PARAMS;
|
|
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
|
|
tf.protocol = ATA_PROT_NODATA;
|
|
tf.nsect = sectors;
|
|
tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
|
|
|
|
err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
|
|
|
|
DPRINTK("EXIT, err_mask=%x\n", err_mask);
|
|
return err_mask;
|
|
}
|
|
|
|
/**
|
|
* ata_sg_clean - Unmap DMA memory associated with command
|
|
* @qc: Command containing DMA memory to be released
|
|
*
|
|
* Unmap all mapped DMA memory associated with this command.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
static void ata_sg_clean(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct scatterlist *sg = qc->__sg;
|
|
int dir = qc->dma_dir;
|
|
void *pad_buf = NULL;
|
|
|
|
WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP));
|
|
WARN_ON(sg == NULL);
|
|
|
|
if (qc->flags & ATA_QCFLAG_SINGLE)
|
|
WARN_ON(qc->n_elem > 1);
|
|
|
|
VPRINTK("unmapping %u sg elements\n", qc->n_elem);
|
|
|
|
/* if we padded the buffer out to 32-bit bound, and data
|
|
* xfer direction is from-device, we must copy from the
|
|
* pad buffer back into the supplied buffer
|
|
*/
|
|
if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE))
|
|
pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
|
|
|
|
if (qc->flags & ATA_QCFLAG_SG) {
|
|
if (qc->n_elem)
|
|
dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
|
|
/* restore last sg */
|
|
sg[qc->orig_n_elem - 1].length += qc->pad_len;
|
|
if (pad_buf) {
|
|
struct scatterlist *psg = &qc->pad_sgent;
|
|
void *addr = kmap_atomic(psg->page, KM_IRQ0);
|
|
memcpy(addr + psg->offset, pad_buf, qc->pad_len);
|
|
kunmap_atomic(addr, KM_IRQ0);
|
|
}
|
|
} else {
|
|
if (qc->n_elem)
|
|
dma_unmap_single(ap->dev,
|
|
sg_dma_address(&sg[0]), sg_dma_len(&sg[0]),
|
|
dir);
|
|
/* restore sg */
|
|
sg->length += qc->pad_len;
|
|
if (pad_buf)
|
|
memcpy(qc->buf_virt + sg->length - qc->pad_len,
|
|
pad_buf, qc->pad_len);
|
|
}
|
|
|
|
qc->flags &= ~ATA_QCFLAG_DMAMAP;
|
|
qc->__sg = NULL;
|
|
}
|
|
|
|
/**
|
|
* ata_fill_sg - Fill PCI IDE PRD table
|
|
* @qc: Metadata associated with taskfile to be transferred
|
|
*
|
|
* Fill PCI IDE PRD (scatter-gather) table with segments
|
|
* associated with the current disk command.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
*/
|
|
static void ata_fill_sg(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct scatterlist *sg;
|
|
unsigned int idx;
|
|
|
|
WARN_ON(qc->__sg == NULL);
|
|
WARN_ON(qc->n_elem == 0 && qc->pad_len == 0);
|
|
|
|
idx = 0;
|
|
ata_for_each_sg(sg, qc) {
|
|
u32 addr, offset;
|
|
u32 sg_len, len;
|
|
|
|
/* determine if physical DMA addr spans 64K boundary.
|
|
* Note h/w doesn't support 64-bit, so we unconditionally
|
|
* truncate dma_addr_t to u32.
|
|
*/
|
|
addr = (u32) sg_dma_address(sg);
|
|
sg_len = sg_dma_len(sg);
|
|
|
|
while (sg_len) {
|
|
offset = addr & 0xffff;
|
|
len = sg_len;
|
|
if ((offset + sg_len) > 0x10000)
|
|
len = 0x10000 - offset;
|
|
|
|
ap->prd[idx].addr = cpu_to_le32(addr);
|
|
ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff);
|
|
VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
|
|
|
|
idx++;
|
|
sg_len -= len;
|
|
addr += len;
|
|
}
|
|
}
|
|
|
|
if (idx)
|
|
ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
|
|
}
|
|
/**
|
|
* ata_check_atapi_dma - Check whether ATAPI DMA can be supported
|
|
* @qc: Metadata associated with taskfile to check
|
|
*
|
|
* Allow low-level driver to filter ATA PACKET commands, returning
|
|
* a status indicating whether or not it is OK to use DMA for the
|
|
* supplied PACKET command.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS: 0 when ATAPI DMA can be used
|
|
* nonzero otherwise
|
|
*/
|
|
int ata_check_atapi_dma(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
int rc = 0; /* Assume ATAPI DMA is OK by default */
|
|
|
|
if (ap->ops->check_atapi_dma)
|
|
rc = ap->ops->check_atapi_dma(qc);
|
|
|
|
return rc;
|
|
}
|
|
/**
|
|
* ata_qc_prep - Prepare taskfile for submission
|
|
* @qc: Metadata associated with taskfile to be prepared
|
|
*
|
|
* Prepare ATA taskfile for submission.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
void ata_qc_prep(struct ata_queued_cmd *qc)
|
|
{
|
|
if (!(qc->flags & ATA_QCFLAG_DMAMAP))
|
|
return;
|
|
|
|
ata_fill_sg(qc);
|
|
}
|
|
|
|
void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
|
|
|
|
/**
|
|
* ata_sg_init_one - Associate command with memory buffer
|
|
* @qc: Command to be associated
|
|
* @buf: Memory buffer
|
|
* @buflen: Length of memory buffer, in bytes.
|
|
*
|
|
* Initialize the data-related elements of queued_cmd @qc
|
|
* to point to a single memory buffer, @buf of byte length @buflen.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
|
|
{
|
|
struct scatterlist *sg;
|
|
|
|
qc->flags |= ATA_QCFLAG_SINGLE;
|
|
|
|
memset(&qc->sgent, 0, sizeof(qc->sgent));
|
|
qc->__sg = &qc->sgent;
|
|
qc->n_elem = 1;
|
|
qc->orig_n_elem = 1;
|
|
qc->buf_virt = buf;
|
|
|
|
sg = qc->__sg;
|
|
sg_init_one(sg, buf, buflen);
|
|
}
|
|
|
|
/**
|
|
* ata_sg_init - Associate command with scatter-gather table.
|
|
* @qc: Command to be associated
|
|
* @sg: Scatter-gather table.
|
|
* @n_elem: Number of elements in s/g table.
|
|
*
|
|
* Initialize the data-related elements of queued_cmd @qc
|
|
* to point to a scatter-gather table @sg, containing @n_elem
|
|
* elements.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
|
|
unsigned int n_elem)
|
|
{
|
|
qc->flags |= ATA_QCFLAG_SG;
|
|
qc->__sg = sg;
|
|
qc->n_elem = n_elem;
|
|
qc->orig_n_elem = n_elem;
|
|
}
|
|
|
|
/**
|
|
* ata_sg_setup_one - DMA-map the memory buffer associated with a command.
|
|
* @qc: Command with memory buffer to be mapped.
|
|
*
|
|
* DMA-map the memory buffer associated with queued_cmd @qc.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, negative on error.
|
|
*/
|
|
|
|
static int ata_sg_setup_one(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
int dir = qc->dma_dir;
|
|
struct scatterlist *sg = qc->__sg;
|
|
dma_addr_t dma_address;
|
|
int trim_sg = 0;
|
|
|
|
/* we must lengthen transfers to end on a 32-bit boundary */
|
|
qc->pad_len = sg->length & 3;
|
|
if (qc->pad_len) {
|
|
void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
|
|
struct scatterlist *psg = &qc->pad_sgent;
|
|
|
|
WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
|
|
|
|
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
|
|
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE)
|
|
memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len,
|
|
qc->pad_len);
|
|
|
|
sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
|
|
sg_dma_len(psg) = ATA_DMA_PAD_SZ;
|
|
/* trim sg */
|
|
sg->length -= qc->pad_len;
|
|
if (sg->length == 0)
|
|
trim_sg = 1;
|
|
|
|
DPRINTK("padding done, sg->length=%u pad_len=%u\n",
|
|
sg->length, qc->pad_len);
|
|
}
|
|
|
|
if (trim_sg) {
|
|
qc->n_elem--;
|
|
goto skip_map;
|
|
}
|
|
|
|
dma_address = dma_map_single(ap->dev, qc->buf_virt,
|
|
sg->length, dir);
|
|
if (dma_mapping_error(dma_address)) {
|
|
/* restore sg */
|
|
sg->length += qc->pad_len;
|
|
return -1;
|
|
}
|
|
|
|
sg_dma_address(sg) = dma_address;
|
|
sg_dma_len(sg) = sg->length;
|
|
|
|
skip_map:
|
|
DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
|
|
qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_sg_setup - DMA-map the scatter-gather table associated with a command.
|
|
* @qc: Command with scatter-gather table to be mapped.
|
|
*
|
|
* DMA-map the scatter-gather table associated with queued_cmd @qc.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, negative on error.
|
|
*
|
|
*/
|
|
|
|
static int ata_sg_setup(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct scatterlist *sg = qc->__sg;
|
|
struct scatterlist *lsg = &sg[qc->n_elem - 1];
|
|
int n_elem, pre_n_elem, dir, trim_sg = 0;
|
|
|
|
VPRINTK("ENTER, ata%u\n", ap->id);
|
|
WARN_ON(!(qc->flags & ATA_QCFLAG_SG));
|
|
|
|
/* we must lengthen transfers to end on a 32-bit boundary */
|
|
qc->pad_len = lsg->length & 3;
|
|
if (qc->pad_len) {
|
|
void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ);
|
|
struct scatterlist *psg = &qc->pad_sgent;
|
|
unsigned int offset;
|
|
|
|
WARN_ON(qc->dev->class != ATA_DEV_ATAPI);
|
|
|
|
memset(pad_buf, 0, ATA_DMA_PAD_SZ);
|
|
|
|
/*
|
|
* psg->page/offset are used to copy to-be-written
|
|
* data in this function or read data in ata_sg_clean.
|
|
*/
|
|
offset = lsg->offset + lsg->length - qc->pad_len;
|
|
psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT);
|
|
psg->offset = offset_in_page(offset);
|
|
|
|
if (qc->tf.flags & ATA_TFLAG_WRITE) {
|
|
void *addr = kmap_atomic(psg->page, KM_IRQ0);
|
|
memcpy(pad_buf, addr + psg->offset, qc->pad_len);
|
|
kunmap_atomic(addr, KM_IRQ0);
|
|
}
|
|
|
|
sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ);
|
|
sg_dma_len(psg) = ATA_DMA_PAD_SZ;
|
|
/* trim last sg */
|
|
lsg->length -= qc->pad_len;
|
|
if (lsg->length == 0)
|
|
trim_sg = 1;
|
|
|
|
DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
|
|
qc->n_elem - 1, lsg->length, qc->pad_len);
|
|
}
|
|
|
|
pre_n_elem = qc->n_elem;
|
|
if (trim_sg && pre_n_elem)
|
|
pre_n_elem--;
|
|
|
|
if (!pre_n_elem) {
|
|
n_elem = 0;
|
|
goto skip_map;
|
|
}
|
|
|
|
dir = qc->dma_dir;
|
|
n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir);
|
|
if (n_elem < 1) {
|
|
/* restore last sg */
|
|
lsg->length += qc->pad_len;
|
|
return -1;
|
|
}
|
|
|
|
DPRINTK("%d sg elements mapped\n", n_elem);
|
|
|
|
skip_map:
|
|
qc->n_elem = n_elem;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_poll_qc_complete - turn irq back on and finish qc
|
|
* @qc: Command to complete
|
|
* @err_mask: ATA status register content
|
|
*
|
|
* LOCKING:
|
|
* None. (grabs host lock)
|
|
*/
|
|
|
|
void ata_poll_qc_complete(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ap->host_set->lock, flags);
|
|
ap->flags &= ~ATA_FLAG_NOINTR;
|
|
ata_irq_on(ap);
|
|
ata_qc_complete(qc);
|
|
spin_unlock_irqrestore(&ap->host_set->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* ata_pio_poll - poll using PIO, depending on current state
|
|
* @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)
|
|
{
|
|
struct ata_queued_cmd *qc;
|
|
u8 status;
|
|
unsigned int poll_state = HSM_ST_UNKNOWN;
|
|
unsigned int reg_state = HSM_ST_UNKNOWN;
|
|
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
WARN_ON(qc == NULL);
|
|
|
|
switch (ap->hsm_task_state) {
|
|
case HSM_ST:
|
|
case HSM_ST_POLL:
|
|
poll_state = HSM_ST_POLL;
|
|
reg_state = HSM_ST;
|
|
break;
|
|
case HSM_ST_LAST:
|
|
case HSM_ST_LAST_POLL:
|
|
poll_state = HSM_ST_LAST_POLL;
|
|
reg_state = HSM_ST_LAST;
|
|
break;
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
status = ata_chk_status(ap);
|
|
if (status & ATA_BUSY) {
|
|
if (time_after(jiffies, ap->pio_task_timeout)) {
|
|
qc->err_mask |= AC_ERR_TIMEOUT;
|
|
ap->hsm_task_state = HSM_ST_TMOUT;
|
|
return 0;
|
|
}
|
|
ap->hsm_task_state = poll_state;
|
|
return ATA_SHORT_PAUSE;
|
|
}
|
|
|
|
ap->hsm_task_state = reg_state;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_pio_complete - check if drive is busy or idle
|
|
* @ap: the target ata_port
|
|
*
|
|
* LOCKING:
|
|
* None. (executing in kernel thread context)
|
|
*
|
|
* RETURNS:
|
|
* Non-zero if qc completed, zero otherwise.
|
|
*/
|
|
|
|
static int ata_pio_complete (struct ata_port *ap)
|
|
{
|
|
struct ata_queued_cmd *qc;
|
|
u8 drv_stat;
|
|
|
|
/*
|
|
* 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 chk-status again. If still busy, fall back to
|
|
* HSM_ST_POLL state.
|
|
*/
|
|
drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
|
|
if (drv_stat & ATA_BUSY) {
|
|
msleep(2);
|
|
drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
|
|
if (drv_stat & ATA_BUSY) {
|
|
ap->hsm_task_state = HSM_ST_LAST_POLL;
|
|
ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
WARN_ON(qc == NULL);
|
|
|
|
drv_stat = ata_wait_idle(ap);
|
|
if (!ata_ok(drv_stat)) {
|
|
qc->err_mask |= __ac_err_mask(drv_stat);
|
|
ap->hsm_task_state = HSM_ST_ERR;
|
|
return 0;
|
|
}
|
|
|
|
ap->hsm_task_state = HSM_ST_IDLE;
|
|
|
|
WARN_ON(qc->err_mask);
|
|
ata_poll_qc_complete(qc);
|
|
|
|
/* another command may start at this point */
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/**
|
|
* swap_buf_le16 - swap halves of 16-bit words in place
|
|
* @buf: Buffer to swap
|
|
* @buf_words: Number of 16-bit words in buffer.
|
|
*
|
|
* Swap halves of 16-bit words if needed to convert from
|
|
* little-endian byte order to native cpu byte order, or
|
|
* vice-versa.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
void swap_buf_le16(u16 *buf, unsigned int buf_words)
|
|
{
|
|
#ifdef __BIG_ENDIAN
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < buf_words; i++)
|
|
buf[i] = le16_to_cpu(buf[i]);
|
|
#endif /* __BIG_ENDIAN */
|
|
}
|
|
|
|
/**
|
|
* ata_mmio_data_xfer - Transfer data by MMIO
|
|
* @ap: port to read/write
|
|
* @buf: data buffer
|
|
* @buflen: buffer length
|
|
* @write_data: read/write
|
|
*
|
|
* Transfer data from/to the device data register by MMIO.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
|
|
unsigned int buflen, int write_data)
|
|
{
|
|
unsigned int i;
|
|
unsigned int words = buflen >> 1;
|
|
u16 *buf16 = (u16 *) buf;
|
|
void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr;
|
|
|
|
/* Transfer multiple of 2 bytes */
|
|
if (write_data) {
|
|
for (i = 0; i < words; i++)
|
|
writew(le16_to_cpu(buf16[i]), mmio);
|
|
} else {
|
|
for (i = 0; i < words; i++)
|
|
buf16[i] = cpu_to_le16(readw(mmio));
|
|
}
|
|
|
|
/* Transfer trailing 1 byte, if any. */
|
|
if (unlikely(buflen & 0x01)) {
|
|
u16 align_buf[1] = { 0 };
|
|
unsigned char *trailing_buf = buf + buflen - 1;
|
|
|
|
if (write_data) {
|
|
memcpy(align_buf, trailing_buf, 1);
|
|
writew(le16_to_cpu(align_buf[0]), mmio);
|
|
} else {
|
|
align_buf[0] = cpu_to_le16(readw(mmio));
|
|
memcpy(trailing_buf, align_buf, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_pio_data_xfer - Transfer data by PIO
|
|
* @ap: port to read/write
|
|
* @buf: data buffer
|
|
* @buflen: buffer length
|
|
* @write_data: read/write
|
|
*
|
|
* Transfer data from/to the device data register by PIO.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
|
|
unsigned int buflen, int write_data)
|
|
{
|
|
unsigned int words = buflen >> 1;
|
|
|
|
/* Transfer multiple of 2 bytes */
|
|
if (write_data)
|
|
outsw(ap->ioaddr.data_addr, buf, words);
|
|
else
|
|
insw(ap->ioaddr.data_addr, buf, words);
|
|
|
|
/* Transfer trailing 1 byte, if any. */
|
|
if (unlikely(buflen & 0x01)) {
|
|
u16 align_buf[1] = { 0 };
|
|
unsigned char *trailing_buf = buf + buflen - 1;
|
|
|
|
if (write_data) {
|
|
memcpy(align_buf, trailing_buf, 1);
|
|
outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr);
|
|
} else {
|
|
align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr));
|
|
memcpy(trailing_buf, align_buf, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_data_xfer - Transfer data from/to the data register.
|
|
* @ap: port to read/write
|
|
* @buf: data buffer
|
|
* @buflen: buffer length
|
|
* @do_write: read/write
|
|
*
|
|
* Transfer data from/to the device data register.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
|
|
unsigned int buflen, int do_write)
|
|
{
|
|
/* Make the crap hardware pay the costs not the good stuff */
|
|
if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
|
|
unsigned long flags;
|
|
local_irq_save(flags);
|
|
if (ap->flags & ATA_FLAG_MMIO)
|
|
ata_mmio_data_xfer(ap, buf, buflen, do_write);
|
|
else
|
|
ata_pio_data_xfer(ap, buf, buflen, do_write);
|
|
local_irq_restore(flags);
|
|
} else {
|
|
if (ap->flags & ATA_FLAG_MMIO)
|
|
ata_mmio_data_xfer(ap, buf, buflen, do_write);
|
|
else
|
|
ata_pio_data_xfer(ap, buf, buflen, do_write);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
|
|
* @qc: Command on going
|
|
*
|
|
* Transfer ATA_SECT_SIZE of data from/to the ATA device.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
static void ata_pio_sector(struct ata_queued_cmd *qc)
|
|
{
|
|
int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
|
|
struct scatterlist *sg = qc->__sg;
|
|
struct ata_port *ap = qc->ap;
|
|
struct page *page;
|
|
unsigned int offset;
|
|
unsigned char *buf;
|
|
|
|
if (qc->cursect == (qc->nsect - 1))
|
|
ap->hsm_task_state = HSM_ST_LAST;
|
|
|
|
page = sg[qc->cursg].page;
|
|
offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE;
|
|
|
|
/* get the current page and offset */
|
|
page = nth_page(page, (offset >> PAGE_SHIFT));
|
|
offset %= PAGE_SIZE;
|
|
|
|
buf = kmap(page) + offset;
|
|
|
|
qc->cursect++;
|
|
qc->cursg_ofs++;
|
|
|
|
if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
|
|
qc->cursg++;
|
|
qc->cursg_ofs = 0;
|
|
}
|
|
|
|
DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
|
|
|
|
/* do the actual data transfer */
|
|
do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
|
|
ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
|
|
|
|
kunmap(page);
|
|
}
|
|
|
|
/**
|
|
* __atapi_pio_bytes - Transfer data from/to the ATAPI device.
|
|
* @qc: Command on going
|
|
* @bytes: number of bytes
|
|
*
|
|
* Transfer Transfer data from/to the ATAPI device.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*
|
|
*/
|
|
|
|
static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
|
|
{
|
|
int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
|
|
struct scatterlist *sg = qc->__sg;
|
|
struct ata_port *ap = qc->ap;
|
|
struct page *page;
|
|
unsigned char *buf;
|
|
unsigned int offset, count;
|
|
|
|
if (qc->curbytes + bytes >= qc->nbytes)
|
|
ap->hsm_task_state = HSM_ST_LAST;
|
|
|
|
next_sg:
|
|
if (unlikely(qc->cursg >= qc->n_elem)) {
|
|
/*
|
|
* The end of qc->sg is reached and the device expects
|
|
* more data to transfer. In order not to overrun qc->sg
|
|
* and fulfill length specified in the byte count register,
|
|
* - for read case, discard trailing data from the device
|
|
* - for write case, padding zero data to the device
|
|
*/
|
|
u16 pad_buf[1] = { 0 };
|
|
unsigned int words = bytes >> 1;
|
|
unsigned int i;
|
|
|
|
if (words) /* warning if bytes > 1 */
|
|
printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
|
|
ap->id, bytes);
|
|
|
|
for (i = 0; i < words; i++)
|
|
ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
|
|
|
|
ap->hsm_task_state = HSM_ST_LAST;
|
|
return;
|
|
}
|
|
|
|
sg = &qc->__sg[qc->cursg];
|
|
|
|
page = sg->page;
|
|
offset = sg->offset + qc->cursg_ofs;
|
|
|
|
/* get the current page and offset */
|
|
page = nth_page(page, (offset >> PAGE_SHIFT));
|
|
offset %= PAGE_SIZE;
|
|
|
|
/* don't overrun current sg */
|
|
count = min(sg->length - qc->cursg_ofs, bytes);
|
|
|
|
/* don't cross page boundaries */
|
|
count = min(count, (unsigned int)PAGE_SIZE - offset);
|
|
|
|
buf = kmap(page) + offset;
|
|
|
|
bytes -= count;
|
|
qc->curbytes += count;
|
|
qc->cursg_ofs += count;
|
|
|
|
if (qc->cursg_ofs == sg->length) {
|
|
qc->cursg++;
|
|
qc->cursg_ofs = 0;
|
|
}
|
|
|
|
DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
|
|
|
|
/* do the actual data transfer */
|
|
ata_data_xfer(ap, buf, count, do_write);
|
|
|
|
kunmap(page);
|
|
|
|
if (bytes)
|
|
goto next_sg;
|
|
}
|
|
|
|
/**
|
|
* atapi_pio_bytes - Transfer data from/to the ATAPI device.
|
|
* @qc: Command on going
|
|
*
|
|
* Transfer Transfer data from/to the ATAPI device.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
static void atapi_pio_bytes(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct ata_device *dev = qc->dev;
|
|
unsigned int ireason, bc_lo, bc_hi, bytes;
|
|
int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
|
|
|
|
ap->ops->tf_read(ap, &qc->tf);
|
|
ireason = qc->tf.nsect;
|
|
bc_lo = qc->tf.lbam;
|
|
bc_hi = qc->tf.lbah;
|
|
bytes = (bc_hi << 8) | bc_lo;
|
|
|
|
/* shall be cleared to zero, indicating xfer of data */
|
|
if (ireason & (1 << 0))
|
|
goto err_out;
|
|
|
|
/* make sure transfer direction matches expected */
|
|
i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0;
|
|
if (do_write != i_write)
|
|
goto err_out;
|
|
|
|
__atapi_pio_bytes(qc, bytes);
|
|
|
|
return;
|
|
|
|
err_out:
|
|
printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
|
|
ap->id, dev->devno);
|
|
qc->err_mask |= AC_ERR_HSM;
|
|
ap->hsm_task_state = HSM_ST_ERR;
|
|
}
|
|
|
|
/**
|
|
* ata_pio_block - start PIO on a block
|
|
* @ap: the target ata_port
|
|
*
|
|
* LOCKING:
|
|
* None. (executing in kernel thread context)
|
|
*/
|
|
|
|
static void ata_pio_block(struct ata_port *ap)
|
|
{
|
|
struct ata_queued_cmd *qc;
|
|
u8 status;
|
|
|
|
/*
|
|
* 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
|
|
* chk-status again. If still busy, fall back to
|
|
* 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->hsm_task_state = HSM_ST_POLL;
|
|
ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
|
|
return;
|
|
}
|
|
}
|
|
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
WARN_ON(qc == NULL);
|
|
|
|
/* check error */
|
|
if (status & (ATA_ERR | ATA_DF)) {
|
|
qc->err_mask |= AC_ERR_DEV;
|
|
ap->hsm_task_state = HSM_ST_ERR;
|
|
return;
|
|
}
|
|
|
|
/* transfer data if any */
|
|
if (is_atapi_taskfile(&qc->tf)) {
|
|
/* DRQ=0 means no more data to transfer */
|
|
if ((status & ATA_DRQ) == 0) {
|
|
ap->hsm_task_state = HSM_ST_LAST;
|
|
return;
|
|
}
|
|
|
|
atapi_pio_bytes(qc);
|
|
} else {
|
|
/* handle BSY=0, DRQ=0 as error */
|
|
if ((status & ATA_DRQ) == 0) {
|
|
qc->err_mask |= AC_ERR_HSM;
|
|
ap->hsm_task_state = HSM_ST_ERR;
|
|
return;
|
|
}
|
|
|
|
ata_pio_sector(qc);
|
|
}
|
|
|
|
ata_altstatus(ap); /* flush */
|
|
}
|
|
|
|
static void ata_pio_error(struct ata_port *ap)
|
|
{
|
|
struct ata_queued_cmd *qc;
|
|
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
WARN_ON(qc == NULL);
|
|
|
|
if (qc->tf.command != ATA_CMD_PACKET)
|
|
printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
|
|
|
|
/* make sure qc->err_mask is available to
|
|
* know what's wrong and recover
|
|
*/
|
|
WARN_ON(qc->err_mask == 0);
|
|
|
|
ap->hsm_task_state = HSM_ST_IDLE;
|
|
|
|
ata_poll_qc_complete(qc);
|
|
}
|
|
|
|
static void ata_pio_task(void *_data)
|
|
{
|
|
struct ata_port *ap = _data;
|
|
unsigned long timeout;
|
|
int qc_completed;
|
|
|
|
fsm_start:
|
|
timeout = 0;
|
|
qc_completed = 0;
|
|
|
|
switch (ap->hsm_task_state) {
|
|
case HSM_ST_IDLE:
|
|
return;
|
|
|
|
case HSM_ST:
|
|
ata_pio_block(ap);
|
|
break;
|
|
|
|
case HSM_ST_LAST:
|
|
qc_completed = ata_pio_complete(ap);
|
|
break;
|
|
|
|
case HSM_ST_POLL:
|
|
case HSM_ST_LAST_POLL:
|
|
timeout = ata_pio_poll(ap);
|
|
break;
|
|
|
|
case HSM_ST_TMOUT:
|
|
case HSM_ST_ERR:
|
|
ata_pio_error(ap);
|
|
return;
|
|
}
|
|
|
|
if (timeout)
|
|
ata_port_queue_task(ap, ata_pio_task, ap, timeout);
|
|
else if (!qc_completed)
|
|
goto fsm_start;
|
|
}
|
|
|
|
/**
|
|
* atapi_packet_task - Write CDB bytes to hardware
|
|
* @_data: Port to which ATAPI device is attached.
|
|
*
|
|
* When device has indicated its readiness to accept
|
|
* a CDB, this function is called. Send the CDB.
|
|
* If DMA is to be performed, exit immediately.
|
|
* Otherwise, we are in polling mode, so poll
|
|
* status under operation succeeds or fails.
|
|
*
|
|
* LOCKING:
|
|
* Kernel thread context (may sleep)
|
|
*/
|
|
|
|
static void atapi_packet_task(void *_data)
|
|
{
|
|
struct ata_port *ap = _data;
|
|
struct ata_queued_cmd *qc;
|
|
u8 status;
|
|
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
WARN_ON(qc == NULL);
|
|
WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
|
|
|
|
/* sleep-wait for BSY to clear */
|
|
DPRINTK("busy wait\n");
|
|
if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
|
|
qc->err_mask |= AC_ERR_TIMEOUT;
|
|
goto err_out;
|
|
}
|
|
|
|
/* make sure DRQ is set */
|
|
status = ata_chk_status(ap);
|
|
if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
|
|
qc->err_mask |= AC_ERR_HSM;
|
|
goto err_out;
|
|
}
|
|
|
|
/* send SCSI cdb */
|
|
DPRINTK("send cdb\n");
|
|
WARN_ON(qc->dev->cdb_len < 12);
|
|
|
|
if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
|
|
qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
|
|
unsigned long flags;
|
|
|
|
/* Once we're done issuing command and kicking bmdma,
|
|
* irq handler takes over. To not lose irq, we need
|
|
* to clear NOINTR flag before sending cdb, but
|
|
* interrupt handler shouldn't be invoked before we're
|
|
* finished. Hence, the following locking.
|
|
*/
|
|
spin_lock_irqsave(&ap->host_set->lock, flags);
|
|
ap->flags &= ~ATA_FLAG_NOINTR;
|
|
ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
|
|
ata_altstatus(ap); /* flush */
|
|
|
|
if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
|
|
ap->ops->bmdma_start(qc); /* initiate bmdma */
|
|
spin_unlock_irqrestore(&ap->host_set->lock, flags);
|
|
} else {
|
|
ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
|
|
ata_altstatus(ap); /* flush */
|
|
|
|
/* PIO commands are handled by polling */
|
|
ap->hsm_task_state = HSM_ST;
|
|
ata_port_queue_task(ap, ata_pio_task, ap, 0);
|
|
}
|
|
|
|
return;
|
|
|
|
err_out:
|
|
ata_poll_qc_complete(qc);
|
|
}
|
|
|
|
/**
|
|
* ata_qc_timeout - Handle timeout of queued command
|
|
* @qc: Command that timed out
|
|
*
|
|
* Some part of the kernel (currently, only the SCSI layer)
|
|
* has noticed that the active command on port @ap has not
|
|
* completed after a specified length of time. Handle this
|
|
* condition by disabling DMA (if necessary) and completing
|
|
* transactions, with error if necessary.
|
|
*
|
|
* This also handles the case of the "lost interrupt", where
|
|
* for some reason (possibly hardware bug, possibly driver bug)
|
|
* an interrupt was not delivered to the driver, even though the
|
|
* transaction completed successfully.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from SCSI layer (none, can sleep)
|
|
*/
|
|
|
|
static void ata_qc_timeout(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct ata_host_set *host_set = ap->host_set;
|
|
u8 host_stat = 0, drv_stat;
|
|
unsigned long flags;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
ap->hsm_task_state = HSM_ST_IDLE;
|
|
|
|
spin_lock_irqsave(&host_set->lock, flags);
|
|
|
|
switch (qc->tf.protocol) {
|
|
|
|
case ATA_PROT_DMA:
|
|
case ATA_PROT_ATAPI_DMA:
|
|
host_stat = ap->ops->bmdma_status(ap);
|
|
|
|
/* before we do anything else, clear DMA-Start bit */
|
|
ap->ops->bmdma_stop(qc);
|
|
|
|
/* fall through */
|
|
|
|
default:
|
|
ata_altstatus(ap);
|
|
drv_stat = ata_chk_status(ap);
|
|
|
|
/* ack bmdma irq events */
|
|
ap->ops->irq_clear(ap);
|
|
|
|
printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
|
|
ap->id, qc->tf.command, drv_stat, host_stat);
|
|
|
|
/* complete taskfile transaction */
|
|
qc->err_mask |= ac_err_mask(drv_stat);
|
|
break;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&host_set->lock, flags);
|
|
|
|
ata_eh_qc_complete(qc);
|
|
|
|
DPRINTK("EXIT\n");
|
|
}
|
|
|
|
/**
|
|
* ata_eng_timeout - Handle timeout of queued command
|
|
* @ap: Port on which timed-out command is active
|
|
*
|
|
* Some part of the kernel (currently, only the SCSI layer)
|
|
* has noticed that the active command on port @ap has not
|
|
* completed after a specified length of time. Handle this
|
|
* condition by disabling DMA (if necessary) and completing
|
|
* transactions, with error if necessary.
|
|
*
|
|
* This also handles the case of the "lost interrupt", where
|
|
* for some reason (possibly hardware bug, possibly driver bug)
|
|
* an interrupt was not delivered to the driver, even though the
|
|
* transaction completed successfully.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from SCSI layer (none, can sleep)
|
|
*/
|
|
|
|
void ata_eng_timeout(struct ata_port *ap)
|
|
{
|
|
DPRINTK("ENTER\n");
|
|
|
|
ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
|
|
|
|
DPRINTK("EXIT\n");
|
|
}
|
|
|
|
/**
|
|
* ata_qc_new - Request an available ATA command, for queueing
|
|
* @ap: Port associated with device @dev
|
|
* @dev: Device from whom we request an available command structure
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
|
|
static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
|
|
{
|
|
struct ata_queued_cmd *qc = NULL;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ATA_MAX_QUEUE; i++)
|
|
if (!test_and_set_bit(i, &ap->qactive)) {
|
|
qc = ata_qc_from_tag(ap, i);
|
|
break;
|
|
}
|
|
|
|
if (qc)
|
|
qc->tag = i;
|
|
|
|
return qc;
|
|
}
|
|
|
|
/**
|
|
* ata_qc_new_init - Request an available ATA command, and initialize it
|
|
* @ap: Port associated with device @dev
|
|
* @dev: Device from whom we request an available command structure
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
|
|
struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
|
|
struct ata_device *dev)
|
|
{
|
|
struct ata_queued_cmd *qc;
|
|
|
|
qc = ata_qc_new(ap);
|
|
if (qc) {
|
|
qc->scsicmd = NULL;
|
|
qc->ap = ap;
|
|
qc->dev = dev;
|
|
|
|
ata_qc_reinit(qc);
|
|
}
|
|
|
|
return qc;
|
|
}
|
|
|
|
/**
|
|
* ata_qc_free - free unused ata_queued_cmd
|
|
* @qc: Command to complete
|
|
*
|
|
* Designed to free unused ata_queued_cmd object
|
|
* in case something prevents using it.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
void ata_qc_free(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
unsigned int tag;
|
|
|
|
WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
|
|
|
|
qc->flags = 0;
|
|
tag = qc->tag;
|
|
if (likely(ata_tag_valid(tag))) {
|
|
if (tag == ap->active_tag)
|
|
ap->active_tag = ATA_TAG_POISON;
|
|
qc->tag = ATA_TAG_POISON;
|
|
clear_bit(tag, &ap->qactive);
|
|
}
|
|
}
|
|
|
|
void __ata_qc_complete(struct ata_queued_cmd *qc)
|
|
{
|
|
WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
|
|
WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
|
|
|
|
if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
|
|
ata_sg_clean(qc);
|
|
|
|
/* atapi: mark qc as inactive to prevent the interrupt handler
|
|
* from completing the command twice later, before the error handler
|
|
* is called. (when rc != 0 and atapi request sense is needed)
|
|
*/
|
|
qc->flags &= ~ATA_QCFLAG_ACTIVE;
|
|
|
|
/* call completion callback */
|
|
qc->complete_fn(qc);
|
|
}
|
|
|
|
static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
|
|
switch (qc->tf.protocol) {
|
|
case ATA_PROT_DMA:
|
|
case ATA_PROT_ATAPI_DMA:
|
|
return 1;
|
|
|
|
case ATA_PROT_ATAPI:
|
|
case ATA_PROT_PIO:
|
|
if (ap->flags & ATA_FLAG_PIO_DMA)
|
|
return 1;
|
|
|
|
/* fall through */
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
/* never reached */
|
|
}
|
|
|
|
/**
|
|
* ata_qc_issue - issue taskfile to device
|
|
* @qc: command to issue to device
|
|
*
|
|
* Prepare an ATA command to submission to device.
|
|
* This includes mapping the data into a DMA-able
|
|
* area, filling in the S/G table, and finally
|
|
* writing the taskfile to hardware, starting the command.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
void ata_qc_issue(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
|
|
qc->ap->active_tag = qc->tag;
|
|
qc->flags |= ATA_QCFLAG_ACTIVE;
|
|
|
|
if (ata_should_dma_map(qc)) {
|
|
if (qc->flags & ATA_QCFLAG_SG) {
|
|
if (ata_sg_setup(qc))
|
|
goto sg_err;
|
|
} else if (qc->flags & ATA_QCFLAG_SINGLE) {
|
|
if (ata_sg_setup_one(qc))
|
|
goto sg_err;
|
|
}
|
|
} else {
|
|
qc->flags &= ~ATA_QCFLAG_DMAMAP;
|
|
}
|
|
|
|
ap->ops->qc_prep(qc);
|
|
|
|
qc->err_mask |= ap->ops->qc_issue(qc);
|
|
if (unlikely(qc->err_mask))
|
|
goto err;
|
|
return;
|
|
|
|
sg_err:
|
|
qc->flags &= ~ATA_QCFLAG_DMAMAP;
|
|
qc->err_mask |= AC_ERR_SYSTEM;
|
|
err:
|
|
ata_qc_complete(qc);
|
|
}
|
|
|
|
/**
|
|
* ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
|
|
* @qc: command to issue to device
|
|
*
|
|
* Using various libata functions and hooks, this function
|
|
* starts an ATA command. ATA commands are grouped into
|
|
* classes called "protocols", and issuing each type of protocol
|
|
* is slightly different.
|
|
*
|
|
* May be used as the qc_issue() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, AC_ERR_* mask on failure
|
|
*/
|
|
|
|
unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
|
|
ata_dev_select(ap, qc->dev->devno, 1, 0);
|
|
|
|
switch (qc->tf.protocol) {
|
|
case ATA_PROT_NODATA:
|
|
ata_tf_to_host(ap, &qc->tf);
|
|
break;
|
|
|
|
case ATA_PROT_DMA:
|
|
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
|
|
ap->ops->bmdma_setup(qc); /* set up bmdma */
|
|
ap->ops->bmdma_start(qc); /* initiate bmdma */
|
|
break;
|
|
|
|
case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
|
|
ata_qc_set_polling(qc);
|
|
ata_tf_to_host(ap, &qc->tf);
|
|
ap->hsm_task_state = HSM_ST;
|
|
ata_port_queue_task(ap, ata_pio_task, ap, 0);
|
|
break;
|
|
|
|
case ATA_PROT_ATAPI:
|
|
ata_qc_set_polling(qc);
|
|
ata_tf_to_host(ap, &qc->tf);
|
|
ata_port_queue_task(ap, atapi_packet_task, ap, 0);
|
|
break;
|
|
|
|
case ATA_PROT_ATAPI_NODATA:
|
|
ap->flags |= ATA_FLAG_NOINTR;
|
|
ata_tf_to_host(ap, &qc->tf);
|
|
ata_port_queue_task(ap, atapi_packet_task, ap, 0);
|
|
break;
|
|
|
|
case ATA_PROT_ATAPI_DMA:
|
|
ap->flags |= ATA_FLAG_NOINTR;
|
|
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
|
|
ap->ops->bmdma_setup(qc); /* set up bmdma */
|
|
ata_port_queue_task(ap, atapi_packet_task, ap, 0);
|
|
break;
|
|
|
|
default:
|
|
WARN_ON(1);
|
|
return AC_ERR_SYSTEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_host_intr - Handle host interrupt for given (port, task)
|
|
* @ap: Port on which interrupt arrived (possibly...)
|
|
* @qc: Taskfile currently active in engine
|
|
*
|
|
* Handle host interrupt for given queued command. Currently,
|
|
* only DMA interrupts are handled. All other commands are
|
|
* handled via polling with interrupts disabled (nIEN bit).
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* One if interrupt was handled, zero if not (shared irq).
|
|
*/
|
|
|
|
inline unsigned int ata_host_intr (struct ata_port *ap,
|
|
struct ata_queued_cmd *qc)
|
|
{
|
|
u8 status, host_stat;
|
|
|
|
switch (qc->tf.protocol) {
|
|
|
|
case ATA_PROT_DMA:
|
|
case ATA_PROT_ATAPI_DMA:
|
|
case ATA_PROT_ATAPI:
|
|
/* check status of DMA engine */
|
|
host_stat = ap->ops->bmdma_status(ap);
|
|
VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
|
|
|
|
/* if it's not our irq... */
|
|
if (!(host_stat & ATA_DMA_INTR))
|
|
goto idle_irq;
|
|
|
|
/* before we do anything else, clear DMA-Start bit */
|
|
ap->ops->bmdma_stop(qc);
|
|
|
|
/* fall through */
|
|
|
|
case ATA_PROT_ATAPI_NODATA:
|
|
case ATA_PROT_NODATA:
|
|
/* check altstatus */
|
|
status = ata_altstatus(ap);
|
|
if (status & ATA_BUSY)
|
|
goto idle_irq;
|
|
|
|
/* check main status, clearing INTRQ */
|
|
status = ata_chk_status(ap);
|
|
if (unlikely(status & ATA_BUSY))
|
|
goto idle_irq;
|
|
DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
|
|
ap->id, qc->tf.protocol, status);
|
|
|
|
/* ack bmdma irq events */
|
|
ap->ops->irq_clear(ap);
|
|
|
|
/* complete taskfile transaction */
|
|
qc->err_mask |= ac_err_mask(status);
|
|
ata_qc_complete(qc);
|
|
break;
|
|
|
|
default:
|
|
goto idle_irq;
|
|
}
|
|
|
|
return 1; /* irq handled */
|
|
|
|
idle_irq:
|
|
ap->stats.idle_irq++;
|
|
|
|
#ifdef ATA_IRQ_TRAP
|
|
if ((ap->stats.idle_irq % 1000) == 0) {
|
|
ata_irq_ack(ap, 0); /* debug trap */
|
|
printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
|
|
return 1;
|
|
}
|
|
#endif
|
|
return 0; /* irq not handled */
|
|
}
|
|
|
|
/**
|
|
* ata_interrupt - Default ATA host interrupt handler
|
|
* @irq: irq line (unused)
|
|
* @dev_instance: pointer to our ata_host_set information structure
|
|
* @regs: unused
|
|
*
|
|
* Default interrupt handler for PCI IDE devices. Calls
|
|
* ata_host_intr() for each port that is not disabled.
|
|
*
|
|
* LOCKING:
|
|
* Obtains host_set lock during operation.
|
|
*
|
|
* RETURNS:
|
|
* IRQ_NONE or IRQ_HANDLED.
|
|
*/
|
|
|
|
irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
|
|
{
|
|
struct ata_host_set *host_set = dev_instance;
|
|
unsigned int i;
|
|
unsigned int handled = 0;
|
|
unsigned long flags;
|
|
|
|
/* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
|
|
spin_lock_irqsave(&host_set->lock, flags);
|
|
|
|
for (i = 0; i < host_set->n_ports; i++) {
|
|
struct ata_port *ap;
|
|
|
|
ap = host_set->ports[i];
|
|
if (ap &&
|
|
!(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) {
|
|
struct ata_queued_cmd *qc;
|
|
|
|
qc = ata_qc_from_tag(ap, ap->active_tag);
|
|
if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
|
|
(qc->flags & ATA_QCFLAG_ACTIVE))
|
|
handled |= ata_host_intr(ap, qc);
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&host_set->lock, flags);
|
|
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
|
|
/*
|
|
* Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
|
|
* without filling any other registers
|
|
*/
|
|
static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev,
|
|
u8 cmd)
|
|
{
|
|
struct ata_taskfile tf;
|
|
int err;
|
|
|
|
ata_tf_init(ap, &tf, dev->devno);
|
|
|
|
tf.command = cmd;
|
|
tf.flags |= ATA_TFLAG_DEVICE;
|
|
tf.protocol = ATA_PROT_NODATA;
|
|
|
|
err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
|
|
if (err)
|
|
printk(KERN_ERR "%s: ata command failed: %d\n",
|
|
__FUNCTION__, err);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev)
|
|
{
|
|
u8 cmd;
|
|
|
|
if (!ata_try_flush_cache(dev))
|
|
return 0;
|
|
|
|
if (ata_id_has_flush_ext(dev->id))
|
|
cmd = ATA_CMD_FLUSH_EXT;
|
|
else
|
|
cmd = ATA_CMD_FLUSH;
|
|
|
|
return ata_do_simple_cmd(ap, dev, cmd);
|
|
}
|
|
|
|
static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev)
|
|
{
|
|
return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1);
|
|
}
|
|
|
|
static int ata_start_drive(struct ata_port *ap, struct ata_device *dev)
|
|
{
|
|
return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE);
|
|
}
|
|
|
|
/**
|
|
* ata_device_resume - wakeup a previously suspended devices
|
|
* @ap: port the device is connected to
|
|
* @dev: the device to resume
|
|
*
|
|
* Kick the drive back into action, by sending it an idle immediate
|
|
* command and making sure its transfer mode matches between drive
|
|
* and host.
|
|
*
|
|
*/
|
|
int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
|
|
{
|
|
if (ap->flags & ATA_FLAG_SUSPENDED) {
|
|
ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
|
|
ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
|
|
ap->flags &= ~ATA_FLAG_SUSPENDED;
|
|
ata_set_mode(ap);
|
|
}
|
|
if (!ata_dev_present(dev))
|
|
return 0;
|
|
if (dev->class == ATA_DEV_ATA)
|
|
ata_start_drive(ap, dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_device_suspend - prepare a device for suspend
|
|
* @ap: port the device is connected to
|
|
* @dev: the device to suspend
|
|
* @state: target power management state
|
|
*
|
|
* Flush the cache on the drive, if appropriate, then issue a
|
|
* standbynow command.
|
|
*/
|
|
int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
|
|
{
|
|
if (!ata_dev_present(dev))
|
|
return 0;
|
|
if (dev->class == ATA_DEV_ATA)
|
|
ata_flush_cache(ap, dev);
|
|
|
|
if (state.event != PM_EVENT_FREEZE)
|
|
ata_standby_drive(ap, dev);
|
|
ap->flags |= ATA_FLAG_SUSPENDED;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_port_start - Set port up for dma.
|
|
* @ap: Port to initialize
|
|
*
|
|
* Called just after data structures for each port are
|
|
* initialized. Allocates space for PRD table.
|
|
*
|
|
* May be used as the port_start() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
int ata_port_start (struct ata_port *ap)
|
|
{
|
|
struct device *dev = ap->dev;
|
|
int rc;
|
|
|
|
ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
|
|
if (!ap->prd)
|
|
return -ENOMEM;
|
|
|
|
rc = ata_pad_alloc(ap, dev);
|
|
if (rc) {
|
|
dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
|
|
return rc;
|
|
}
|
|
|
|
DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* ata_port_stop - Undo ata_port_start()
|
|
* @ap: Port to shut down
|
|
*
|
|
* Frees the PRD table.
|
|
*
|
|
* May be used as the port_stop() entry in ata_port_operations.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
void ata_port_stop (struct ata_port *ap)
|
|
{
|
|
struct device *dev = ap->dev;
|
|
|
|
dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
|
|
ata_pad_free(ap, dev);
|
|
}
|
|
|
|
void ata_host_stop (struct ata_host_set *host_set)
|
|
{
|
|
if (host_set->mmio_base)
|
|
iounmap(host_set->mmio_base);
|
|
}
|
|
|
|
|
|
/**
|
|
* ata_host_remove - Unregister SCSI host structure with upper layers
|
|
* @ap: Port to unregister
|
|
* @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)
|
|
{
|
|
struct Scsi_Host *sh = ap->host;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
if (do_unregister)
|
|
scsi_remove_host(sh);
|
|
|
|
ap->ops->port_stop(ap);
|
|
}
|
|
|
|
/**
|
|
* ata_host_init - Initialize an ata_port structure
|
|
* @ap: Structure to initialize
|
|
* @host: associated SCSI mid-layer structure
|
|
* @host_set: Collection of hosts to which @ap belongs
|
|
* @ent: Probe information provided by low-level driver
|
|
* @port_no: Port number associated with this ata_port
|
|
*
|
|
* Initialize a new ata_port structure, and its associated
|
|
* scsi_host.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from caller.
|
|
*/
|
|
|
|
static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
|
|
struct ata_host_set *host_set,
|
|
const struct ata_probe_ent *ent, unsigned int port_no)
|
|
{
|
|
unsigned int i;
|
|
|
|
host->max_id = 16;
|
|
host->max_lun = 1;
|
|
host->max_channel = 1;
|
|
host->unique_id = ata_unique_id++;
|
|
host->max_cmd_len = 12;
|
|
|
|
ap->flags = ATA_FLAG_PORT_DISABLED;
|
|
ap->id = host->unique_id;
|
|
ap->host = host;
|
|
ap->ctl = ATA_DEVCTL_OBS;
|
|
ap->host_set = host_set;
|
|
ap->dev = ent->dev;
|
|
ap->port_no = port_no;
|
|
ap->hard_port_no =
|
|
ent->legacy_mode ? ent->hard_port_no : port_no;
|
|
ap->pio_mask = ent->pio_mask;
|
|
ap->mwdma_mask = ent->mwdma_mask;
|
|
ap->udma_mask = ent->udma_mask;
|
|
ap->flags |= ent->host_flags;
|
|
ap->ops = ent->port_ops;
|
|
ap->cbl = ATA_CBL_NONE;
|
|
ap->active_tag = ATA_TAG_POISON;
|
|
ap->last_ctl = 0xFF;
|
|
|
|
INIT_WORK(&ap->port_task, NULL, NULL);
|
|
INIT_LIST_HEAD(&ap->eh_done_q);
|
|
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
struct ata_device *dev = &ap->device[i];
|
|
dev->devno = i;
|
|
dev->pio_mask = UINT_MAX;
|
|
dev->mwdma_mask = UINT_MAX;
|
|
dev->udma_mask = UINT_MAX;
|
|
}
|
|
|
|
#ifdef ATA_IRQ_TRAP
|
|
ap->stats.unhandled_irq = 1;
|
|
ap->stats.idle_irq = 1;
|
|
#endif
|
|
|
|
memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports));
|
|
}
|
|
|
|
/**
|
|
* ata_host_add - Attach low-level ATA driver to system
|
|
* @ent: Information provided by low-level driver
|
|
* @host_set: Collections of ports to which we add
|
|
* @port_no: Port number associated with this host
|
|
*
|
|
* Attach low-level ATA driver to system.
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*
|
|
* RETURNS:
|
|
* New ata_port on success, for NULL on error.
|
|
*/
|
|
|
|
static struct ata_port * ata_host_add(const struct ata_probe_ent *ent,
|
|
struct ata_host_set *host_set,
|
|
unsigned int port_no)
|
|
{
|
|
struct Scsi_Host *host;
|
|
struct ata_port *ap;
|
|
int rc;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
if (!ent->port_ops->probe_reset &&
|
|
!(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
|
|
printk(KERN_ERR "ata%u: no reset mechanism available\n",
|
|
port_no);
|
|
return NULL;
|
|
}
|
|
|
|
host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
|
|
if (!host)
|
|
return NULL;
|
|
|
|
host->transportt = &ata_scsi_transport_template;
|
|
|
|
ap = (struct ata_port *) &host->hostdata[0];
|
|
|
|
ata_host_init(ap, host, host_set, ent, port_no);
|
|
|
|
rc = ap->ops->port_start(ap);
|
|
if (rc)
|
|
goto err_out;
|
|
|
|
return ap;
|
|
|
|
err_out:
|
|
scsi_host_put(host);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* ata_device_add - Register hardware device with ATA and SCSI layers
|
|
* @ent: Probe information describing hardware device to be registered
|
|
*
|
|
* This function processes the information provided in the probe
|
|
* information struct @ent, allocates the necessary ATA and SCSI
|
|
* host information structures, initializes them, and registers
|
|
* everything with requisite kernel subsystems.
|
|
*
|
|
* This function requests irqs, probes the ATA bus, and probes
|
|
* the SCSI bus.
|
|
*
|
|
* LOCKING:
|
|
* PCI/etc. bus probe sem.
|
|
*
|
|
* RETURNS:
|
|
* Number of ports registered. Zero on error (no ports registered).
|
|
*/
|
|
|
|
int ata_device_add(const struct ata_probe_ent *ent)
|
|
{
|
|
unsigned int count = 0, i;
|
|
struct device *dev = ent->dev;
|
|
struct ata_host_set *host_set;
|
|
|
|
DPRINTK("ENTER\n");
|
|
/* alloc a container for our list of ATA ports (buses) */
|
|
host_set = kzalloc(sizeof(struct ata_host_set) +
|
|
(ent->n_ports * sizeof(void *)), GFP_KERNEL);
|
|
if (!host_set)
|
|
return 0;
|
|
spin_lock_init(&host_set->lock);
|
|
|
|
host_set->dev = dev;
|
|
host_set->n_ports = ent->n_ports;
|
|
host_set->irq = ent->irq;
|
|
host_set->mmio_base = ent->mmio_base;
|
|
host_set->private_data = ent->private_data;
|
|
host_set->ops = ent->port_ops;
|
|
host_set->flags = ent->host_set_flags;
|
|
|
|
/* register each port bound to this device */
|
|
for (i = 0; i < ent->n_ports; i++) {
|
|
struct ata_port *ap;
|
|
unsigned long xfer_mode_mask;
|
|
|
|
ap = ata_host_add(ent, host_set, i);
|
|
if (!ap)
|
|
goto err_out;
|
|
|
|
host_set->ports[i] = ap;
|
|
xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) |
|
|
(ap->mwdma_mask << ATA_SHIFT_MWDMA) |
|
|
(ap->pio_mask << ATA_SHIFT_PIO);
|
|
|
|
/* print per-port info to dmesg */
|
|
printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
|
|
"bmdma 0x%lX irq %lu\n",
|
|
ap->id,
|
|
ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
|
|
ata_mode_string(xfer_mode_mask),
|
|
ap->ioaddr.cmd_addr,
|
|
ap->ioaddr.ctl_addr,
|
|
ap->ioaddr.bmdma_addr,
|
|
ent->irq);
|
|
|
|
ata_chk_status(ap);
|
|
host_set->ops->irq_clear(ap);
|
|
count++;
|
|
}
|
|
|
|
if (!count)
|
|
goto err_free_ret;
|
|
|
|
/* obtain irq, that is shared between channels */
|
|
if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
|
|
DRV_NAME, host_set))
|
|
goto err_out;
|
|
|
|
/* perform each probe synchronously */
|
|
DPRINTK("probe begin\n");
|
|
for (i = 0; i < count; i++) {
|
|
struct ata_port *ap;
|
|
int rc;
|
|
|
|
ap = host_set->ports[i];
|
|
|
|
DPRINTK("ata%u: bus probe begin\n", ap->id);
|
|
rc = ata_bus_probe(ap);
|
|
DPRINTK("ata%u: bus probe end\n", ap->id);
|
|
|
|
if (rc) {
|
|
/* FIXME: do something useful here?
|
|
* Current libata behavior will
|
|
* tear down everything when
|
|
* the module is removed
|
|
* or the h/w is unplugged.
|
|
*/
|
|
}
|
|
|
|
rc = scsi_add_host(ap->host, dev);
|
|
if (rc) {
|
|
printk(KERN_ERR "ata%u: scsi_add_host failed\n",
|
|
ap->id);
|
|
/* FIXME: do something useful here */
|
|
/* FIXME: handle unconditional calls to
|
|
* scsi_scan_host and ata_host_remove, below,
|
|
* at the very least
|
|
*/
|
|
}
|
|
}
|
|
|
|
/* probes are done, now scan each port's disk(s) */
|
|
DPRINTK("host probe begin\n");
|
|
for (i = 0; i < count; i++) {
|
|
struct ata_port *ap = host_set->ports[i];
|
|
|
|
ata_scsi_scan_host(ap);
|
|
}
|
|
|
|
dev_set_drvdata(dev, host_set);
|
|
|
|
VPRINTK("EXIT, returning %u\n", ent->n_ports);
|
|
return ent->n_ports; /* success */
|
|
|
|
err_out:
|
|
for (i = 0; i < count; i++) {
|
|
ata_host_remove(host_set->ports[i], 1);
|
|
scsi_host_put(host_set->ports[i]->host);
|
|
}
|
|
err_free_ret:
|
|
kfree(host_set);
|
|
VPRINTK("EXIT, returning 0\n");
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_host_set_remove - PCI layer callback for device removal
|
|
* @host_set: ATA host set that was removed
|
|
*
|
|
* Unregister all objects associated with this host set. Free those
|
|
* objects.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from calling layer (may sleep).
|
|
*/
|
|
|
|
void ata_host_set_remove(struct ata_host_set *host_set)
|
|
{
|
|
struct ata_port *ap;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < host_set->n_ports; i++) {
|
|
ap = host_set->ports[i];
|
|
scsi_remove_host(ap->host);
|
|
}
|
|
|
|
free_irq(host_set->irq, host_set);
|
|
|
|
for (i = 0; i < host_set->n_ports; i++) {
|
|
ap = host_set->ports[i];
|
|
|
|
ata_scsi_release(ap->host);
|
|
|
|
if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) {
|
|
struct ata_ioports *ioaddr = &ap->ioaddr;
|
|
|
|
if (ioaddr->cmd_addr == 0x1f0)
|
|
release_region(0x1f0, 8);
|
|
else if (ioaddr->cmd_addr == 0x170)
|
|
release_region(0x170, 8);
|
|
}
|
|
|
|
scsi_host_put(ap->host);
|
|
}
|
|
|
|
if (host_set->ops->host_stop)
|
|
host_set->ops->host_stop(host_set);
|
|
|
|
kfree(host_set);
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_release - SCSI layer callback hook for host unload
|
|
* @host: libata host to be unloaded
|
|
*
|
|
* Performs all duties necessary to shut down a libata port...
|
|
* Kill port kthread, disable port, and release resources.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from SCSI layer.
|
|
*
|
|
* RETURNS:
|
|
* One.
|
|
*/
|
|
|
|
int ata_scsi_release(struct Scsi_Host *host)
|
|
{
|
|
struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
|
|
int i;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
ap->ops->port_disable(ap);
|
|
ata_host_remove(ap, 0);
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++)
|
|
kfree(ap->device[i].id);
|
|
|
|
DPRINTK("EXIT\n");
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* ata_std_ports - initialize ioaddr with standard port offsets.
|
|
* @ioaddr: IO address structure to be initialized
|
|
*
|
|
* Utility function which initializes data_addr, error_addr,
|
|
* feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
|
|
* device_addr, status_addr, and command_addr to standard offsets
|
|
* relative to cmd_addr.
|
|
*
|
|
* Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
|
|
*/
|
|
|
|
void ata_std_ports(struct ata_ioports *ioaddr)
|
|
{
|
|
ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
|
|
ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR;
|
|
ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE;
|
|
ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT;
|
|
ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL;
|
|
ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM;
|
|
ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH;
|
|
ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE;
|
|
ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS;
|
|
ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
void ata_pci_host_stop (struct ata_host_set *host_set)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(host_set->dev);
|
|
|
|
pci_iounmap(pdev, host_set->mmio_base);
|
|
}
|
|
|
|
/**
|
|
* ata_pci_remove_one - PCI layer callback for device removal
|
|
* @pdev: PCI device that was removed
|
|
*
|
|
* PCI layer indicates to libata via this hook that
|
|
* 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.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from PCI layer (may sleep).
|
|
*/
|
|
|
|
void ata_pci_remove_one (struct pci_dev *pdev)
|
|
{
|
|
struct device *dev = pci_dev_to_dev(pdev);
|
|
struct ata_host_set *host_set = dev_get_drvdata(dev);
|
|
|
|
ata_host_set_remove(host_set);
|
|
pci_release_regions(pdev);
|
|
pci_disable_device(pdev);
|
|
dev_set_drvdata(dev, NULL);
|
|
}
|
|
|
|
/* move to PCI subsystem */
|
|
int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
|
|
{
|
|
unsigned long tmp = 0;
|
|
|
|
switch (bits->width) {
|
|
case 1: {
|
|
u8 tmp8 = 0;
|
|
pci_read_config_byte(pdev, bits->reg, &tmp8);
|
|
tmp = tmp8;
|
|
break;
|
|
}
|
|
case 2: {
|
|
u16 tmp16 = 0;
|
|
pci_read_config_word(pdev, bits->reg, &tmp16);
|
|
tmp = tmp16;
|
|
break;
|
|
}
|
|
case 4: {
|
|
u32 tmp32 = 0;
|
|
pci_read_config_dword(pdev, bits->reg, &tmp32);
|
|
tmp = tmp32;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
tmp &= bits->mask;
|
|
|
|
return (tmp == bits->val) ? 1 : 0;
|
|
}
|
|
|
|
int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state)
|
|
{
|
|
pci_save_state(pdev);
|
|
pci_disable_device(pdev);
|
|
pci_set_power_state(pdev, PCI_D3hot);
|
|
return 0;
|
|
}
|
|
|
|
int ata_pci_device_resume(struct pci_dev *pdev)
|
|
{
|
|
pci_set_power_state(pdev, PCI_D0);
|
|
pci_restore_state(pdev);
|
|
pci_enable_device(pdev);
|
|
pci_set_master(pdev);
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_PCI */
|
|
|
|
|
|
static int __init ata_init(void)
|
|
{
|
|
ata_wq = create_workqueue("ata");
|
|
if (!ata_wq)
|
|
return -ENOMEM;
|
|
|
|
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ata_exit(void)
|
|
{
|
|
destroy_workqueue(ata_wq);
|
|
}
|
|
|
|
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
|
|
* likely to change as new drivers are added and updated.
|
|
* Do not depend on ABI/API stability.
|
|
*/
|
|
|
|
EXPORT_SYMBOL_GPL(ata_std_bios_param);
|
|
EXPORT_SYMBOL_GPL(ata_std_ports);
|
|
EXPORT_SYMBOL_GPL(ata_device_add);
|
|
EXPORT_SYMBOL_GPL(ata_host_set_remove);
|
|
EXPORT_SYMBOL_GPL(ata_sg_init);
|
|
EXPORT_SYMBOL_GPL(ata_sg_init_one);
|
|
EXPORT_SYMBOL_GPL(__ata_qc_complete);
|
|
EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
|
|
EXPORT_SYMBOL_GPL(ata_eng_timeout);
|
|
EXPORT_SYMBOL_GPL(ata_tf_load);
|
|
EXPORT_SYMBOL_GPL(ata_tf_read);
|
|
EXPORT_SYMBOL_GPL(ata_noop_dev_select);
|
|
EXPORT_SYMBOL_GPL(ata_std_dev_select);
|
|
EXPORT_SYMBOL_GPL(ata_tf_to_fis);
|
|
EXPORT_SYMBOL_GPL(ata_tf_from_fis);
|
|
EXPORT_SYMBOL_GPL(ata_check_status);
|
|
EXPORT_SYMBOL_GPL(ata_altstatus);
|
|
EXPORT_SYMBOL_GPL(ata_exec_command);
|
|
EXPORT_SYMBOL_GPL(ata_port_start);
|
|
EXPORT_SYMBOL_GPL(ata_port_stop);
|
|
EXPORT_SYMBOL_GPL(ata_host_stop);
|
|
EXPORT_SYMBOL_GPL(ata_interrupt);
|
|
EXPORT_SYMBOL_GPL(ata_qc_prep);
|
|
EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
|
|
EXPORT_SYMBOL_GPL(ata_bmdma_setup);
|
|
EXPORT_SYMBOL_GPL(ata_bmdma_start);
|
|
EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
|
|
EXPORT_SYMBOL_GPL(ata_bmdma_status);
|
|
EXPORT_SYMBOL_GPL(ata_bmdma_stop);
|
|
EXPORT_SYMBOL_GPL(ata_port_probe);
|
|
EXPORT_SYMBOL_GPL(sata_phy_reset);
|
|
EXPORT_SYMBOL_GPL(__sata_phy_reset);
|
|
EXPORT_SYMBOL_GPL(ata_bus_reset);
|
|
EXPORT_SYMBOL_GPL(ata_std_probeinit);
|
|
EXPORT_SYMBOL_GPL(ata_std_softreset);
|
|
EXPORT_SYMBOL_GPL(sata_std_hardreset);
|
|
EXPORT_SYMBOL_GPL(ata_std_postreset);
|
|
EXPORT_SYMBOL_GPL(ata_std_probe_reset);
|
|
EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
|
|
EXPORT_SYMBOL_GPL(ata_dev_revalidate);
|
|
EXPORT_SYMBOL_GPL(ata_dev_classify);
|
|
EXPORT_SYMBOL_GPL(ata_dev_pair);
|
|
EXPORT_SYMBOL_GPL(ata_port_disable);
|
|
EXPORT_SYMBOL_GPL(ata_ratelimit);
|
|
EXPORT_SYMBOL_GPL(ata_busy_sleep);
|
|
EXPORT_SYMBOL_GPL(ata_port_queue_task);
|
|
EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
|
|
EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
|
|
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
|
|
EXPORT_SYMBOL_GPL(ata_scsi_release);
|
|
EXPORT_SYMBOL_GPL(ata_host_intr);
|
|
EXPORT_SYMBOL_GPL(ata_id_string);
|
|
EXPORT_SYMBOL_GPL(ata_id_c_string);
|
|
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
|
|
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
|
|
EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
|
|
|
|
EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
|
|
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);
|
|
EXPORT_SYMBOL_GPL(ata_pci_init_native_mode);
|
|
EXPORT_SYMBOL_GPL(ata_pci_init_one);
|
|
EXPORT_SYMBOL_GPL(ata_pci_remove_one);
|
|
EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
|
|
EXPORT_SYMBOL_GPL(ata_pci_device_resume);
|
|
EXPORT_SYMBOL_GPL(ata_pci_default_filter);
|
|
EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
|
|
#endif /* CONFIG_PCI */
|
|
|
|
EXPORT_SYMBOL_GPL(ata_device_suspend);
|
|
EXPORT_SYMBOL_GPL(ata_device_resume);
|
|
EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
|
|
EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
|