2008-07-15 13:21:58 -06:00
|
|
|
/*
|
|
|
|
* ATAPI support.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
2009-01-02 08:12:53 -07:00
|
|
|
#include <linux/cdrom.h>
|
2008-07-15 13:21:58 -06:00
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/ide.h>
|
2009-03-31 12:14:57 -06:00
|
|
|
#include <linux/scatterlist.h>
|
|
|
|
|
2008-07-15 13:22:03 -06:00
|
|
|
#include <scsi/scsi.h>
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
#define debug_log(fmt, args...) \
|
|
|
|
printk(KERN_INFO "ide: " fmt, ## args)
|
|
|
|
#else
|
|
|
|
#define debug_log(fmt, args...) do {} while (0)
|
|
|
|
#endif
|
|
|
|
|
2009-01-02 08:12:54 -07:00
|
|
|
#define ATAPI_MIN_CDB_BYTES 12
|
|
|
|
|
2009-01-02 08:12:52 -07:00
|
|
|
static inline int dev_is_idecd(ide_drive_t *drive)
|
|
|
|
{
|
2009-01-02 08:12:54 -07:00
|
|
|
return drive->media == ide_cdrom || drive->media == ide_optical;
|
2009-01-02 08:12:52 -07:00
|
|
|
}
|
|
|
|
|
2008-10-10 14:39:34 -06:00
|
|
|
/*
|
|
|
|
* Check whether we can support a device,
|
|
|
|
* based on the ATAPI IDENTIFY command results.
|
|
|
|
*/
|
|
|
|
int ide_check_atapi_device(ide_drive_t *drive, const char *s)
|
|
|
|
{
|
|
|
|
u16 *id = drive->id;
|
|
|
|
u8 gcw[2], protocol, device_type, removable, drq_type, packet_size;
|
|
|
|
|
|
|
|
*((u16 *)&gcw) = id[ATA_ID_CONFIG];
|
|
|
|
|
|
|
|
protocol = (gcw[1] & 0xC0) >> 6;
|
|
|
|
device_type = gcw[1] & 0x1F;
|
|
|
|
removable = (gcw[0] & 0x80) >> 7;
|
|
|
|
drq_type = (gcw[0] & 0x60) >> 5;
|
|
|
|
packet_size = gcw[0] & 0x03;
|
|
|
|
|
|
|
|
#ifdef CONFIG_PPC
|
|
|
|
/* kludge for Apple PowerBook internal zip */
|
|
|
|
if (drive->media == ide_floppy && device_type == 5 &&
|
|
|
|
!strstr((char *)&id[ATA_ID_PROD], "CD-ROM") &&
|
|
|
|
strstr((char *)&id[ATA_ID_PROD], "ZIP"))
|
|
|
|
device_type = 0;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if (protocol != 2)
|
|
|
|
printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n",
|
|
|
|
s, drive->name, protocol);
|
|
|
|
else if ((drive->media == ide_floppy && device_type != 0) ||
|
|
|
|
(drive->media == ide_tape && device_type != 1))
|
|
|
|
printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n",
|
|
|
|
s, drive->name, device_type);
|
|
|
|
else if (removable == 0)
|
|
|
|
printk(KERN_ERR "%s: %s: the removable flag is not set\n",
|
|
|
|
s, drive->name);
|
|
|
|
else if (drive->media == ide_floppy && drq_type == 3)
|
|
|
|
printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not "
|
|
|
|
"supported\n", s, drive->name, drq_type);
|
|
|
|
else if (packet_size != 0)
|
|
|
|
printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 "
|
|
|
|
"bytes\n", s, drive->name, packet_size);
|
|
|
|
else
|
|
|
|
return 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_check_atapi_device);
|
|
|
|
|
2008-10-10 14:39:36 -06:00
|
|
|
/* PIO data transfer routine using the scatter gather table. */
|
|
|
|
int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
|
|
|
|
unsigned int bcount, int write)
|
|
|
|
{
|
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
|
|
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
|
|
|
|
xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data;
|
|
|
|
struct scatterlist *sg = pc->sg;
|
|
|
|
char *buf;
|
|
|
|
int count, done = 0;
|
|
|
|
|
|
|
|
while (bcount) {
|
|
|
|
count = min(sg->length - pc->b_count, bcount);
|
|
|
|
|
|
|
|
if (PageHighMem(sg_page(sg))) {
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
|
|
|
|
xf(drive, NULL, buf + pc->b_count, count);
|
|
|
|
kunmap_atomic(buf - sg->offset, KM_IRQ0);
|
|
|
|
local_irq_restore(flags);
|
|
|
|
} else {
|
|
|
|
buf = sg_virt(sg);
|
|
|
|
xf(drive, NULL, buf + pc->b_count, count);
|
|
|
|
}
|
|
|
|
|
|
|
|
bcount -= count;
|
|
|
|
pc->b_count += count;
|
|
|
|
done += count;
|
|
|
|
|
|
|
|
if (pc->b_count == sg->length) {
|
|
|
|
if (!--pc->sg_cnt)
|
|
|
|
break;
|
|
|
|
pc->sg = sg = sg_next(sg);
|
|
|
|
pc->b_count = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (bcount) {
|
|
|
|
printk(KERN_ERR "%s: %d leftover bytes, %s\n", drive->name,
|
|
|
|
bcount, write ? "padding with zeros"
|
|
|
|
: "discarding data");
|
|
|
|
ide_pad_transfer(drive, write, bcount);
|
|
|
|
}
|
|
|
|
|
|
|
|
return done;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_io_buffers);
|
|
|
|
|
2008-10-10 14:39:37 -06:00
|
|
|
void ide_init_pc(struct ide_atapi_pc *pc)
|
|
|
|
{
|
|
|
|
memset(pc, 0, sizeof(*pc));
|
|
|
|
pc->buf = pc->pc_buf;
|
|
|
|
pc->buf_size = IDE_PC_BUFFER_SIZE;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_init_pc);
|
|
|
|
|
2008-10-10 14:39:37 -06:00
|
|
|
/*
|
|
|
|
* Generate a new packet command request in front of the request queue, before
|
|
|
|
* the current request, so that it will be processed immediately, on the next
|
|
|
|
* pass through the driver.
|
|
|
|
*/
|
2008-10-13 13:39:32 -06:00
|
|
|
static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
|
|
|
|
struct ide_atapi_pc *pc, struct request *rq)
|
2008-10-10 14:39:37 -06:00
|
|
|
{
|
|
|
|
blk_rq_init(NULL, rq);
|
|
|
|
rq->cmd_type = REQ_TYPE_SPECIAL;
|
|
|
|
rq->cmd_flags |= REQ_PREEMPT;
|
|
|
|
rq->buffer = (char *)pc;
|
|
|
|
rq->rq_disk = disk;
|
2009-03-13 14:16:12 -06:00
|
|
|
|
|
|
|
if (pc->req_xfer) {
|
|
|
|
rq->data = pc->buf;
|
|
|
|
rq->data_len = pc->req_xfer;
|
|
|
|
}
|
|
|
|
|
2008-10-10 14:39:37 -06:00
|
|
|
memcpy(rq->cmd, pc->c, 12);
|
|
|
|
if (drive->media == ide_tape)
|
|
|
|
rq->cmd[13] = REQ_IDETAPE_PC1;
|
2009-03-24 16:22:44 -06:00
|
|
|
|
|
|
|
drive->hwif->rq = NULL;
|
|
|
|
|
|
|
|
elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
|
2008-10-10 14:39:37 -06:00
|
|
|
}
|
|
|
|
|
2008-10-10 14:39:38 -06:00
|
|
|
/*
|
|
|
|
* Add a special packet command request to the tail of the request queue,
|
|
|
|
* and wait for it to be serviced.
|
|
|
|
*/
|
|
|
|
int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
|
|
|
|
struct ide_atapi_pc *pc)
|
|
|
|
{
|
|
|
|
struct request *rq;
|
|
|
|
int error;
|
|
|
|
|
|
|
|
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
|
|
|
|
rq->cmd_type = REQ_TYPE_SPECIAL;
|
|
|
|
rq->buffer = (char *)pc;
|
2009-03-13 14:16:12 -06:00
|
|
|
|
|
|
|
if (pc->req_xfer) {
|
|
|
|
rq->data = pc->buf;
|
|
|
|
rq->data_len = pc->req_xfer;
|
|
|
|
}
|
|
|
|
|
2008-10-10 14:39:38 -06:00
|
|
|
memcpy(rq->cmd, pc->c, 12);
|
|
|
|
if (drive->media == ide_tape)
|
|
|
|
rq->cmd[13] = REQ_IDETAPE_PC1;
|
|
|
|
error = blk_execute_rq(drive->queue, disk, rq, 0);
|
|
|
|
blk_put_request(rq);
|
|
|
|
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_queue_pc_tail);
|
|
|
|
|
2008-10-10 14:39:39 -06:00
|
|
|
int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk)
|
|
|
|
{
|
|
|
|
struct ide_atapi_pc pc;
|
|
|
|
|
|
|
|
ide_init_pc(&pc);
|
|
|
|
pc.c[0] = TEST_UNIT_READY;
|
|
|
|
|
|
|
|
return ide_queue_pc_tail(drive, disk, &pc);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_do_test_unit_ready);
|
|
|
|
|
2008-10-10 14:39:39 -06:00
|
|
|
int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start)
|
|
|
|
{
|
|
|
|
struct ide_atapi_pc pc;
|
|
|
|
|
|
|
|
ide_init_pc(&pc);
|
|
|
|
pc.c[0] = START_STOP;
|
|
|
|
pc.c[4] = start;
|
|
|
|
|
|
|
|
if (drive->media == ide_tape)
|
|
|
|
pc.flags |= PC_FLAG_WAIT_FOR_DSC;
|
|
|
|
|
|
|
|
return ide_queue_pc_tail(drive, disk, &pc);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_do_start_stop);
|
|
|
|
|
2008-10-10 14:39:38 -06:00
|
|
|
int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on)
|
|
|
|
{
|
|
|
|
struct ide_atapi_pc pc;
|
|
|
|
|
2008-10-17 10:09:11 -06:00
|
|
|
if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
|
2008-10-10 14:39:38 -06:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
ide_init_pc(&pc);
|
|
|
|
pc.c[0] = ALLOW_MEDIUM_REMOVAL;
|
|
|
|
pc.c[4] = on;
|
|
|
|
|
|
|
|
return ide_queue_pc_tail(drive, disk, &pc);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_set_media_lock);
|
|
|
|
|
2008-10-13 13:39:32 -06:00
|
|
|
void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc)
|
|
|
|
{
|
|
|
|
ide_init_pc(pc);
|
|
|
|
pc->c[0] = REQUEST_SENSE;
|
|
|
|
if (drive->media == ide_floppy) {
|
|
|
|
pc->c[4] = 255;
|
|
|
|
pc->req_xfer = 18;
|
|
|
|
} else {
|
|
|
|
pc->c[4] = 20;
|
|
|
|
pc->req_xfer = 20;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Called when an error was detected during the last packet command.
|
|
|
|
* We queue a request sense packet command in the head of the request list.
|
|
|
|
*/
|
|
|
|
void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk)
|
|
|
|
{
|
|
|
|
struct request *rq = &drive->request_sense_rq;
|
|
|
|
struct ide_atapi_pc *pc = &drive->request_sense_pc;
|
|
|
|
|
|
|
|
(void)ide_read_error(drive);
|
|
|
|
ide_create_request_sense_cmd(drive, pc);
|
|
|
|
if (drive->media == ide_tape)
|
|
|
|
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
|
|
|
|
ide_queue_pc_head(drive, disk, pc, rq);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_retry_pc);
|
|
|
|
|
2009-01-02 08:12:53 -07:00
|
|
|
int ide_cd_expiry(ide_drive_t *drive)
|
|
|
|
{
|
2009-01-06 09:20:50 -07:00
|
|
|
struct request *rq = drive->hwif->rq;
|
2009-01-02 08:12:53 -07:00
|
|
|
unsigned long wait = 0;
|
|
|
|
|
|
|
|
debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Some commands are *slow* and normally take a long time to complete.
|
|
|
|
* Usually we can use the ATAPI "disconnect" to bypass this, but not all
|
|
|
|
* commands/drives support that. Let ide_timer_expiry keep polling us
|
|
|
|
* for these.
|
|
|
|
*/
|
|
|
|
switch (rq->cmd[0]) {
|
|
|
|
case GPCMD_BLANK:
|
|
|
|
case GPCMD_FORMAT_UNIT:
|
|
|
|
case GPCMD_RESERVE_RZONE_TRACK:
|
|
|
|
case GPCMD_CLOSE_TRACK:
|
|
|
|
case GPCMD_FLUSH_CACHE:
|
|
|
|
wait = ATAPI_WAIT_PC;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
if (!(rq->cmd_flags & REQ_QUIET))
|
|
|
|
printk(KERN_INFO "cmd 0x%x timed out\n",
|
|
|
|
rq->cmd[0]);
|
|
|
|
wait = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return wait;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_cd_expiry);
|
|
|
|
|
2009-01-02 08:12:52 -07:00
|
|
|
int ide_cd_get_xferlen(struct request *rq)
|
|
|
|
{
|
|
|
|
if (blk_fs_request(rq))
|
|
|
|
return 32768;
|
|
|
|
else if (blk_sense_request(rq) || blk_pc_request(rq) ||
|
|
|
|
rq->cmd_type == REQ_TYPE_ATA_PC)
|
|
|
|
return rq->data_len;
|
|
|
|
else
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
|
|
|
|
|
2009-03-24 16:22:46 -06:00
|
|
|
void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
|
|
|
|
{
|
2009-03-27 05:46:37 -06:00
|
|
|
struct ide_cmd cmd;
|
2009-03-24 16:22:46 -06:00
|
|
|
|
2009-03-27 05:46:37 -06:00
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
cmd.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
|
|
|
|
IDE_TFLAG_IN_NSECT;
|
2009-03-24 16:22:46 -06:00
|
|
|
|
2009-03-27 05:46:37 -06:00
|
|
|
drive->hwif->tp_ops->tf_read(drive, &cmd);
|
2009-03-24 16:22:46 -06:00
|
|
|
|
2009-03-27 05:46:37 -06:00
|
|
|
*bcount = (cmd.tf.lbah << 8) | cmd.tf.lbam;
|
|
|
|
*ireason = cmd.tf.nsect & 3;
|
2009-03-24 16:22:46 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
|
|
|
|
|
2008-10-13 13:39:32 -06:00
|
|
|
/*
|
|
|
|
* This is the usual interrupt handler which will be called during a packet
|
|
|
|
* command. We will transfer some of the data (as requested by the drive)
|
|
|
|
* and will re-point interrupt handler to us.
|
|
|
|
*/
|
|
|
|
static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
|
2008-07-15 13:22:03 -06:00
|
|
|
{
|
2008-10-13 13:39:31 -06:00
|
|
|
struct ide_atapi_pc *pc = drive->pc;
|
2008-07-15 13:22:03 -06:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2009-01-06 09:20:50 -07:00
|
|
|
struct request *rq = hwif->rq;
|
2008-07-23 11:55:56 -06:00
|
|
|
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
|
2008-07-15 13:22:03 -06:00
|
|
|
xfer_func_t *xferfunc;
|
2008-10-13 13:39:31 -06:00
|
|
|
unsigned int timeout, temp;
|
2008-07-15 13:22:03 -06:00
|
|
|
u16 bcount;
|
2009-01-02 08:12:54 -07:00
|
|
|
u8 stat, ireason, dsc = 0;
|
2008-07-15 13:22:03 -06:00
|
|
|
|
|
|
|
debug_log("Enter %s - interrupt handler\n", __func__);
|
|
|
|
|
2009-01-02 08:12:54 -07:00
|
|
|
timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
|
|
|
|
: WAIT_TAPE_CMD;
|
2008-10-13 13:39:31 -06:00
|
|
|
|
2008-07-15 13:22:03 -06:00
|
|
|
/* Clear the interrupt */
|
2008-07-23 11:55:56 -06:00
|
|
|
stat = tp_ops->read_status(hwif);
|
2008-07-15 13:22:03 -06:00
|
|
|
|
|
|
|
if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
|
|
|
|
if (hwif->dma_ops->dma_end(drive) ||
|
2009-01-02 08:12:54 -07:00
|
|
|
(drive->media == ide_tape && (stat & ATA_ERR))) {
|
|
|
|
if (drive->media == ide_floppy)
|
2008-07-15 13:22:03 -06:00
|
|
|
printk(KERN_ERR "%s: DMA %s error\n",
|
|
|
|
drive->name, rq_data_dir(pc->rq)
|
|
|
|
? "write" : "read");
|
|
|
|
pc->flags |= PC_FLAG_DMA_ERROR;
|
|
|
|
} else {
|
|
|
|
pc->xferred = pc->req_xfer;
|
2008-10-13 13:39:32 -06:00
|
|
|
if (drive->pc_update_buffers)
|
|
|
|
drive->pc_update_buffers(drive, pc);
|
2008-07-15 13:22:03 -06:00
|
|
|
}
|
|
|
|
debug_log("%s: DMA finished\n", drive->name);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* No more interrupts */
|
2008-10-10 14:39:21 -06:00
|
|
|
if ((stat & ATA_DRQ) == 0) {
|
2009-03-27 05:46:36 -06:00
|
|
|
int uptodate;
|
|
|
|
|
2008-07-15 13:22:03 -06:00
|
|
|
debug_log("Packet command completed, %d bytes transferred\n",
|
|
|
|
pc->xferred);
|
|
|
|
|
|
|
|
pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
|
|
|
|
|
|
|
|
local_irq_enable_in_hardirq();
|
|
|
|
|
2009-01-02 08:12:54 -07:00
|
|
|
if (drive->media == ide_tape &&
|
2008-10-10 14:39:21 -06:00
|
|
|
(stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE)
|
|
|
|
stat &= ~ATA_ERR;
|
2008-07-23 11:56:01 -06:00
|
|
|
|
2008-10-10 14:39:21 -06:00
|
|
|
if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) {
|
2008-07-15 13:22:03 -06:00
|
|
|
/* Error detected */
|
|
|
|
debug_log("%s: I/O error\n", drive->name);
|
|
|
|
|
2009-01-02 08:12:54 -07:00
|
|
|
if (drive->media != ide_tape)
|
2008-07-15 13:22:03 -06:00
|
|
|
pc->rq->errors++;
|
|
|
|
|
2008-07-23 11:56:01 -06:00
|
|
|
if (rq->cmd[0] == REQUEST_SENSE) {
|
2008-07-15 13:22:03 -06:00
|
|
|
printk(KERN_ERR "%s: I/O error in request sense"
|
|
|
|
" command\n", drive->name);
|
|
|
|
return ide_do_reset(drive);
|
|
|
|
}
|
|
|
|
|
2008-07-23 11:56:01 -06:00
|
|
|
debug_log("[cmd %x]: check condition\n", rq->cmd[0]);
|
2008-07-15 13:22:03 -06:00
|
|
|
|
|
|
|
/* Retry operation */
|
2008-10-13 13:39:32 -06:00
|
|
|
ide_retry_pc(drive, rq->rq_disk);
|
2008-07-23 11:56:01 -06:00
|
|
|
|
2008-07-15 13:22:03 -06:00
|
|
|
/* queued, but not started */
|
|
|
|
return ide_stopped;
|
|
|
|
}
|
|
|
|
pc->error = 0;
|
2008-10-13 13:39:30 -06:00
|
|
|
|
|
|
|
if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0)
|
|
|
|
dsc = 1;
|
2008-07-23 11:56:01 -06:00
|
|
|
|
2008-07-15 13:22:03 -06:00
|
|
|
/* Command finished - Call the callback function */
|
2009-03-27 05:46:36 -06:00
|
|
|
uptodate = drive->pc_callback(drive, dsc);
|
|
|
|
|
|
|
|
if (uptodate == 0)
|
|
|
|
drive->failed_pc = NULL;
|
|
|
|
|
2009-03-27 05:46:43 -06:00
|
|
|
if (blk_special_request(rq)) {
|
|
|
|
rq->errors = 0;
|
2009-03-27 05:46:44 -06:00
|
|
|
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
|
2009-03-27 05:46:43 -06:00
|
|
|
} else {
|
|
|
|
if (blk_fs_request(rq) == 0 && uptodate <= 0) {
|
|
|
|
if (rq->errors == 0)
|
|
|
|
rq->errors = -EIO;
|
|
|
|
}
|
2009-03-27 05:46:45 -06:00
|
|
|
ide_complete_rq(drive, uptodate ? 0 : -EIO,
|
|
|
|
ide_rq_bytes(rq));
|
2009-03-27 05:46:43 -06:00
|
|
|
}
|
2008-07-23 11:56:01 -06:00
|
|
|
|
2008-07-15 13:22:03 -06:00
|
|
|
return ide_stopped;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
|
|
|
|
pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
|
|
|
|
printk(KERN_ERR "%s: The device wants to issue more interrupts "
|
|
|
|
"in DMA mode\n", drive->name);
|
|
|
|
ide_dma_off(drive);
|
|
|
|
return ide_do_reset(drive);
|
|
|
|
}
|
|
|
|
|
2008-07-23 11:55:54 -06:00
|
|
|
/* Get the number of bytes to transfer on this interrupt. */
|
|
|
|
ide_read_bcount_and_ireason(drive, &bcount, &ireason);
|
2008-07-15 13:22:03 -06:00
|
|
|
|
2008-10-10 14:39:21 -06:00
|
|
|
if (ireason & ATAPI_COD) {
|
2008-07-15 13:22:03 -06:00
|
|
|
printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
|
|
|
|
return ide_do_reset(drive);
|
|
|
|
}
|
2008-07-23 11:56:01 -06:00
|
|
|
|
2008-10-10 14:39:21 -06:00
|
|
|
if (((ireason & ATAPI_IO) == ATAPI_IO) ==
|
|
|
|
!!(pc->flags & PC_FLAG_WRITING)) {
|
2008-07-15 13:22:03 -06:00
|
|
|
/* Hopefully, we will never get here */
|
|
|
|
printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
|
|
|
|
"to %s!\n", drive->name,
|
2008-10-10 14:39:21 -06:00
|
|
|
(ireason & ATAPI_IO) ? "Write" : "Read",
|
|
|
|
(ireason & ATAPI_IO) ? "Read" : "Write");
|
2008-07-15 13:22:03 -06:00
|
|
|
return ide_do_reset(drive);
|
|
|
|
}
|
2008-07-23 11:56:01 -06:00
|
|
|
|
2008-07-15 13:22:03 -06:00
|
|
|
if (!(pc->flags & PC_FLAG_WRITING)) {
|
|
|
|
/* Reading - Check that we have enough space */
|
|
|
|
temp = pc->xferred + bcount;
|
|
|
|
if (temp > pc->req_xfer) {
|
|
|
|
if (temp > pc->buf_size) {
|
|
|
|
printk(KERN_ERR "%s: The device wants to send "
|
|
|
|
"us more data than expected - "
|
|
|
|
"discarding data\n",
|
|
|
|
drive->name);
|
2009-01-02 08:12:54 -07:00
|
|
|
|
|
|
|
ide_pad_transfer(drive, 0, bcount);
|
2008-10-13 13:39:31 -06:00
|
|
|
goto next_irq;
|
2008-07-15 13:22:03 -06:00
|
|
|
}
|
|
|
|
debug_log("The device wants to send us more data than "
|
|
|
|
"expected - allowing transfer\n");
|
|
|
|
}
|
2008-07-23 11:55:56 -06:00
|
|
|
xferfunc = tp_ops->input_data;
|
2008-07-15 13:22:03 -06:00
|
|
|
} else
|
2008-07-23 11:55:56 -06:00
|
|
|
xferfunc = tp_ops->output_data;
|
2008-07-15 13:22:03 -06:00
|
|
|
|
2009-01-02 08:12:54 -07:00
|
|
|
if ((drive->media == ide_floppy && !pc->buf) ||
|
|
|
|
(drive->media == ide_tape && pc->bh)) {
|
2008-10-13 13:39:32 -06:00
|
|
|
int done = drive->pc_io_buffers(drive, pc, bcount,
|
2008-10-10 14:39:36 -06:00
|
|
|
!!(pc->flags & PC_FLAG_WRITING));
|
|
|
|
|
|
|
|
/* FIXME: don't do partial completions */
|
2009-01-02 08:12:54 -07:00
|
|
|
if (drive->media == ide_floppy)
|
2009-03-27 05:46:45 -06:00
|
|
|
ide_complete_rq(drive, 0,
|
|
|
|
done ? done : ide_rq_bytes(rq));
|
2008-10-10 14:39:36 -06:00
|
|
|
} else
|
2008-07-15 13:22:03 -06:00
|
|
|
xferfunc(drive, NULL, pc->cur_pos, bcount);
|
|
|
|
|
|
|
|
/* Update the current position */
|
|
|
|
pc->xferred += bcount;
|
|
|
|
pc->cur_pos += bcount;
|
|
|
|
|
|
|
|
debug_log("[cmd %x] transferred %d bytes on that intr.\n",
|
2008-07-23 11:56:01 -06:00
|
|
|
rq->cmd[0], bcount);
|
2008-10-13 13:39:31 -06:00
|
|
|
next_irq:
|
2008-07-15 13:22:03 -06:00
|
|
|
/* And set the interrupt handler again */
|
2009-03-27 05:46:46 -06:00
|
|
|
ide_set_handler(drive, ide_pc_intr, timeout);
|
2008-07-15 13:22:03 -06:00
|
|
|
return ide_started;
|
|
|
|
}
|
2008-07-15 13:21:58 -06:00
|
|
|
|
2009-03-27 05:46:46 -06:00
|
|
|
static void ide_init_packet_cmd(struct ide_cmd *cmd, u32 tf_flags,
|
|
|
|
u16 bcount, u8 dma)
|
2009-03-24 16:22:39 -06:00
|
|
|
{
|
2009-03-27 05:46:46 -06:00
|
|
|
cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO;
|
|
|
|
cmd->tf_flags |= IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM |
|
|
|
|
IDE_TFLAG_OUT_FEATURE | tf_flags;
|
2009-03-27 05:46:47 -06:00
|
|
|
cmd->tf.command = ATA_CMD_PACKET;
|
2009-03-27 05:46:46 -06:00
|
|
|
cmd->tf.feature = dma; /* Use PIO/DMA */
|
|
|
|
cmd->tf.lbam = bcount & 0xff;
|
|
|
|
cmd->tf.lbah = (bcount >> 8) & 0xff;
|
2009-03-24 16:22:39 -06:00
|
|
|
}
|
|
|
|
|
2008-07-23 11:55:54 -06:00
|
|
|
static u8 ide_read_ireason(ide_drive_t *drive)
|
|
|
|
{
|
2009-03-27 05:46:37 -06:00
|
|
|
struct ide_cmd cmd;
|
2008-07-23 11:55:54 -06:00
|
|
|
|
2009-03-27 05:46:37 -06:00
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
cmd.tf_flags = IDE_TFLAG_IN_NSECT;
|
2008-07-23 11:55:54 -06:00
|
|
|
|
2009-03-27 05:46:37 -06:00
|
|
|
drive->hwif->tp_ops->tf_read(drive, &cmd);
|
2008-07-23 11:55:54 -06:00
|
|
|
|
2009-03-27 05:46:37 -06:00
|
|
|
return cmd.tf.nsect & 3;
|
2008-07-23 11:55:54 -06:00
|
|
|
}
|
|
|
|
|
2008-07-15 13:21:58 -06:00
|
|
|
static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
|
|
|
|
{
|
|
|
|
int retries = 100;
|
|
|
|
|
2008-10-10 14:39:21 -06:00
|
|
|
while (retries-- && ((ireason & ATAPI_COD) == 0 ||
|
|
|
|
(ireason & ATAPI_IO))) {
|
2008-07-15 13:21:58 -06:00
|
|
|
printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
|
|
|
|
"a packet command, retrying\n", drive->name);
|
|
|
|
udelay(100);
|
2008-07-23 11:55:54 -06:00
|
|
|
ireason = ide_read_ireason(drive);
|
2008-07-15 13:21:58 -06:00
|
|
|
if (retries == 0) {
|
|
|
|
printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
|
|
|
|
"a packet command, ignoring\n",
|
|
|
|
drive->name);
|
2008-10-10 14:39:21 -06:00
|
|
|
ireason |= ATAPI_COD;
|
|
|
|
ireason &= ~ATAPI_IO;
|
2008-07-15 13:21:58 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return ireason;
|
|
|
|
}
|
|
|
|
|
2008-10-13 13:39:32 -06:00
|
|
|
static int ide_delayed_transfer_pc(ide_drive_t *drive)
|
|
|
|
{
|
|
|
|
/* Send the actual packet */
|
|
|
|
drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
|
|
|
|
|
|
|
|
/* Timeout for the packet command */
|
|
|
|
return WAIT_FLOPPY_CMD;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
|
2008-07-15 13:21:58 -06:00
|
|
|
{
|
2009-01-02 08:12:56 -07:00
|
|
|
struct ide_atapi_pc *uninitialized_var(pc);
|
2008-07-15 13:21:58 -06:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2009-01-06 09:20:50 -07:00
|
|
|
struct request *rq = hwif->rq;
|
2008-10-13 13:39:32 -06:00
|
|
|
ide_expiry_t *expiry;
|
|
|
|
unsigned int timeout;
|
2009-01-02 08:12:54 -07:00
|
|
|
int cmd_len;
|
2008-07-15 13:21:58 -06:00
|
|
|
ide_startstop_t startstop;
|
|
|
|
u8 ireason;
|
|
|
|
|
2008-10-10 14:39:21 -06:00
|
|
|
if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) {
|
2008-07-15 13:21:58 -06:00
|
|
|
printk(KERN_ERR "%s: Strange, packet command initiated yet "
|
|
|
|
"DRQ isn't asserted\n", drive->name);
|
|
|
|
return startstop;
|
|
|
|
}
|
|
|
|
|
2009-01-02 08:12:53 -07:00
|
|
|
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
|
|
|
|
if (drive->dma)
|
|
|
|
drive->waiting_for_dma = 1;
|
|
|
|
}
|
|
|
|
|
2009-01-02 08:12:54 -07:00
|
|
|
if (dev_is_idecd(drive)) {
|
|
|
|
/* ATAPI commands get padded out to 12 bytes minimum */
|
|
|
|
cmd_len = COMMAND_SIZE(rq->cmd[0]);
|
|
|
|
if (cmd_len < ATAPI_MIN_CDB_BYTES)
|
|
|
|
cmd_len = ATAPI_MIN_CDB_BYTES;
|
|
|
|
|
2009-01-02 08:12:55 -07:00
|
|
|
timeout = rq->timeout;
|
|
|
|
expiry = ide_cd_expiry;
|
2008-10-13 13:39:32 -06:00
|
|
|
} else {
|
2009-01-02 08:12:56 -07:00
|
|
|
pc = drive->pc;
|
|
|
|
|
2009-01-02 08:12:55 -07:00
|
|
|
cmd_len = ATAPI_MIN_CDB_BYTES;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If necessary schedule the packet transfer to occur 'timeout'
|
|
|
|
* miliseconds later in ide_delayed_transfer_pc() after the
|
|
|
|
* device says it's ready for a packet.
|
|
|
|
*/
|
|
|
|
if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
|
|
|
|
timeout = drive->pc_delay;
|
|
|
|
expiry = &ide_delayed_transfer_pc;
|
|
|
|
} else {
|
|
|
|
timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
|
|
|
|
: WAIT_TAPE_CMD;
|
|
|
|
expiry = NULL;
|
|
|
|
}
|
2009-01-02 08:12:56 -07:00
|
|
|
|
|
|
|
ireason = ide_read_ireason(drive);
|
|
|
|
if (drive->media == ide_tape)
|
|
|
|
ireason = ide_wait_ireason(drive, ireason);
|
|
|
|
|
|
|
|
if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
|
|
|
|
printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
|
|
|
|
"a packet command\n", drive->name);
|
|
|
|
|
|
|
|
return ide_do_reset(drive);
|
|
|
|
}
|
2008-10-13 13:39:32 -06:00
|
|
|
}
|
|
|
|
|
2009-03-27 05:46:46 -06:00
|
|
|
hwif->expiry = expiry;
|
|
|
|
|
2008-07-15 13:21:58 -06:00
|
|
|
/* Set the interrupt routine */
|
2009-01-06 09:20:58 -07:00
|
|
|
ide_set_handler(drive,
|
|
|
|
(dev_is_idecd(drive) ? drive->irq_handler
|
|
|
|
: ide_pc_intr),
|
2009-03-27 05:46:46 -06:00
|
|
|
timeout);
|
2008-07-15 13:21:58 -06:00
|
|
|
|
|
|
|
/* Begin DMA, if necessary */
|
2009-01-02 08:12:56 -07:00
|
|
|
if (dev_is_idecd(drive)) {
|
|
|
|
if (drive->dma)
|
|
|
|
hwif->dma_ops->dma_start(drive);
|
|
|
|
} else {
|
|
|
|
if (pc->flags & PC_FLAG_DMA_OK) {
|
|
|
|
pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
|
|
|
|
hwif->dma_ops->dma_start(drive);
|
|
|
|
}
|
2008-07-15 13:21:58 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Send the actual packet */
|
2008-07-23 11:56:01 -06:00
|
|
|
if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
|
2009-01-02 08:12:54 -07:00
|
|
|
hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
|
2008-07-15 13:21:58 -06:00
|
|
|
|
|
|
|
return ide_started;
|
|
|
|
}
|
2008-07-15 13:22:00 -06:00
|
|
|
|
2009-03-27 05:46:46 -06:00
|
|
|
ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
|
2008-07-15 13:22:00 -06:00
|
|
|
{
|
2009-01-02 08:12:55 -07:00
|
|
|
struct ide_atapi_pc *pc;
|
2008-07-15 13:22:00 -06:00
|
|
|
ide_hwif_t *hwif = drive->hwif;
|
2009-03-27 05:46:46 -06:00
|
|
|
const struct ide_dma_ops *dma_ops = hwif->dma_ops;
|
2009-01-02 08:12:53 -07:00
|
|
|
ide_expiry_t *expiry = NULL;
|
2009-03-27 05:46:37 -06:00
|
|
|
struct request *rq = hwif->rq;
|
2009-01-02 08:12:56 -07:00
|
|
|
unsigned int timeout;
|
2008-10-13 13:39:50 -06:00
|
|
|
u32 tf_flags;
|
2009-01-02 08:12:52 -07:00
|
|
|
u16 bcount;
|
2009-03-27 05:46:47 -06:00
|
|
|
u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT);
|
2008-07-15 13:22:00 -06:00
|
|
|
|
2009-01-02 08:12:52 -07:00
|
|
|
if (dev_is_idecd(drive)) {
|
|
|
|
tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
|
2009-03-27 05:46:37 -06:00
|
|
|
bcount = ide_cd_get_xferlen(rq);
|
2009-01-02 08:12:53 -07:00
|
|
|
expiry = ide_cd_expiry;
|
2009-01-02 08:12:56 -07:00
|
|
|
timeout = ATAPI_WAIT_PC;
|
2009-01-02 08:12:55 -07:00
|
|
|
|
2009-03-27 05:46:37 -06:00
|
|
|
if (drive->dma) {
|
2009-03-27 05:46:46 -06:00
|
|
|
if (ide_build_sglist(drive, cmd))
|
|
|
|
drive->dma = !dma_ops->dma_setup(drive, cmd);
|
2009-03-27 05:46:37 -06:00
|
|
|
else
|
|
|
|
drive->dma = 0;
|
|
|
|
}
|
2009-01-02 08:12:52 -07:00
|
|
|
} else {
|
2009-01-02 08:12:55 -07:00
|
|
|
pc = drive->pc;
|
|
|
|
|
|
|
|
/* We haven't transferred any data yet */
|
|
|
|
pc->xferred = 0;
|
|
|
|
pc->cur_pos = pc->buf;
|
|
|
|
|
2009-01-02 08:12:52 -07:00
|
|
|
tf_flags = IDE_TFLAG_OUT_DEVICE;
|
|
|
|
bcount = ((drive->media == ide_tape) ?
|
|
|
|
pc->req_xfer :
|
|
|
|
min(pc->req_xfer, 63 * 1024));
|
2008-07-15 13:22:00 -06:00
|
|
|
|
2009-01-02 08:12:55 -07:00
|
|
|
if (pc->flags & PC_FLAG_DMA_ERROR) {
|
|
|
|
pc->flags &= ~PC_FLAG_DMA_ERROR;
|
|
|
|
ide_dma_off(drive);
|
|
|
|
}
|
2008-07-15 13:22:00 -06:00
|
|
|
|
2009-01-02 08:12:55 -07:00
|
|
|
if ((pc->flags & PC_FLAG_DMA_OK) &&
|
2009-03-27 05:46:37 -06:00
|
|
|
(drive->dev_flags & IDE_DFLAG_USING_DMA)) {
|
2009-03-27 05:46:46 -06:00
|
|
|
if (ide_build_sglist(drive, cmd))
|
|
|
|
drive->dma = !dma_ops->dma_setup(drive, cmd);
|
2009-03-27 05:46:37 -06:00
|
|
|
else
|
|
|
|
drive->dma = 0;
|
|
|
|
}
|
2008-07-15 13:22:00 -06:00
|
|
|
|
2009-01-02 08:12:55 -07:00
|
|
|
if (!drive->dma)
|
|
|
|
pc->flags &= ~PC_FLAG_DMA_OK;
|
2009-01-02 08:12:56 -07:00
|
|
|
|
|
|
|
timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
|
|
|
|
: WAIT_TAPE_CMD;
|
2009-01-02 08:12:55 -07:00
|
|
|
}
|
2008-07-15 13:22:00 -06:00
|
|
|
|
2009-03-27 05:46:46 -06:00
|
|
|
ide_init_packet_cmd(cmd, tf_flags, bcount, drive->dma);
|
|
|
|
|
|
|
|
(void)do_rw_taskfile(drive, cmd);
|
2008-07-15 13:22:00 -06:00
|
|
|
|
2009-03-27 05:46:47 -06:00
|
|
|
if (drq_int) {
|
2009-01-02 08:12:53 -07:00
|
|
|
if (drive->dma)
|
|
|
|
drive->waiting_for_dma = 0;
|
2009-03-27 05:46:47 -06:00
|
|
|
hwif->expiry = expiry;
|
2008-07-15 13:22:00 -06:00
|
|
|
}
|
2009-03-27 05:46:47 -06:00
|
|
|
|
|
|
|
ide_execute_command(drive, cmd, ide_transfer_pc, timeout);
|
|
|
|
|
|
|
|
return drq_int ? ide_started : ide_transfer_pc(drive);
|
2008-07-15 13:22:00 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ide_issue_pc);
|