#include <linux/cdrom.h>
#include <linux/delay.h>
#include <linux/ide.h>
+#include <linux/scatterlist.h>
+#include <linux/gfp.h>
+
#include <scsi/scsi.h>
+#define DRV_NAME "ide-atapi"
+#define PFX DRV_NAME ": "
+
#ifdef DEBUG
#define debug_log(fmt, args...) \
printk(KERN_INFO "ide: " fmt, ## args)
#define debug_log(fmt, args...) do {} while (0)
#endif
+#define ATAPI_MIN_CDB_BYTES 12
+
static inline int dev_is_idecd(ide_drive_t *drive)
{
- return (drive->media == ide_cdrom || drive->media == ide_optical) &&
- !(drive->dev_flags & IDE_DFLAG_SCSI);
+ return drive->media == ide_cdrom || drive->media == ide_optical;
}
/*
}
EXPORT_SYMBOL_GPL(ide_check_atapi_device);
-/* 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);
-
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);
/*
- * 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.
- */
-static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
- struct ide_atapi_pc *pc, struct request *rq)
-{
- blk_rq_init(NULL, rq);
- rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->cmd_flags |= REQ_PREEMPT;
- rq->buffer = (char *)pc;
- rq->rq_disk = disk;
- memcpy(rq->cmd, pc->c, 12);
- if (drive->media == ide_tape)
- rq->cmd[13] = REQ_IDETAPE_PC1;
- ide_do_drive_cmd(drive, rq);
-}
-
-/*
* 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 ide_atapi_pc *pc, void *buf, unsigned int bufflen)
{
struct request *rq;
int error;
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->buffer = (char *)pc;
+ rq->special = (char *)pc;
+
+ if (buf && bufflen) {
+ error = blk_rq_map_kern(drive->queue, rq, buf, bufflen,
+ GFP_NOIO);
+ if (error)
+ goto put_req;
+ }
+
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);
+put_req:
blk_put_request(rq);
-
return error;
}
EXPORT_SYMBOL_GPL(ide_queue_pc_tail);
ide_init_pc(&pc);
pc.c[0] = TEST_UNIT_READY;
- return ide_queue_pc_tail(drive, disk, &pc);
+ return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
}
EXPORT_SYMBOL_GPL(ide_do_test_unit_ready);
if (drive->media == ide_tape)
pc.flags |= PC_FLAG_WAIT_FOR_DSC;
- return ide_queue_pc_tail(drive, disk, &pc);
+ return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
}
EXPORT_SYMBOL_GPL(ide_do_start_stop);
pc.c[0] = ALLOW_MEDIUM_REMOVAL;
pc.c[4] = on;
- return ide_queue_pc_tail(drive, disk, &pc);
+ return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
}
EXPORT_SYMBOL_GPL(ide_set_media_lock);
}
EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd);
+void ide_prep_sense(ide_drive_t *drive, struct request *rq)
+{
+ struct request_sense *sense = &drive->sense_data;
+ struct request *sense_rq = &drive->sense_rq;
+ unsigned int cmd_len, sense_len;
+ int err;
+
+ switch (drive->media) {
+ case ide_floppy:
+ cmd_len = 255;
+ sense_len = 18;
+ break;
+ case ide_tape:
+ cmd_len = 20;
+ sense_len = 20;
+ break;
+ default:
+ cmd_len = 18;
+ sense_len = 18;
+ }
+
+ BUG_ON(sense_len > sizeof(*sense));
+
+ if (blk_sense_request(rq) || drive->sense_rq_armed)
+ return;
+
+ memset(sense, 0, sizeof(*sense));
+
+ blk_rq_init(rq->q, sense_rq);
+
+ err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len,
+ GFP_NOIO);
+ if (unlikely(err)) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING PFX "%s: failed to map sense "
+ "buffer\n", drive->name);
+ return;
+ }
+
+ sense_rq->rq_disk = rq->rq_disk;
+ sense_rq->cmd[0] = GPCMD_REQUEST_SENSE;
+ sense_rq->cmd[4] = cmd_len;
+ sense_rq->cmd_type = REQ_TYPE_SENSE;
+ sense_rq->cmd_flags |= REQ_PREEMPT;
+
+ if (drive->media == ide_tape)
+ sense_rq->cmd[13] = REQ_IDETAPE_PC1;
+
+ drive->sense_rq_armed = true;
+}
+EXPORT_SYMBOL_GPL(ide_prep_sense);
+
+int ide_queue_sense_rq(ide_drive_t *drive, void *special)
+{
+ /* deferred failure from ide_prep_sense() */
+ if (!drive->sense_rq_armed) {
+ printk(KERN_WARNING PFX "%s: error queuing a sense request\n",
+ drive->name);
+ return -ENOMEM;
+ }
+
+ drive->sense_rq.special = special;
+ drive->sense_rq_armed = false;
+
+ drive->hwif->rq = NULL;
+
+ elv_add_request(drive->queue, &drive->sense_rq,
+ ELEVATOR_INSERT_FRONT, 0);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
+
/*
* 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.
+ * We queue a request sense packet command at the head of the request
+ * queue.
*/
-void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk)
+void ide_retry_pc(ide_drive_t *drive)
{
- struct request *rq = &drive->request_sense_rq;
+ struct request *failed_rq = drive->hwif->rq;
+ struct request *sense_rq = &drive->sense_rq;
struct ide_atapi_pc *pc = &drive->request_sense_pc;
(void)ide_read_error(drive);
- ide_create_request_sense_cmd(drive, pc);
+
+ /* init pc from sense_rq */
+ ide_init_pc(pc);
+ memcpy(pc->c, sense_rq->cmd, 12);
+
if (drive->media == ide_tape)
- set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- ide_queue_pc_head(drive, disk, pc, rq);
+ drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
+
+ /*
+ * Push back the failed request and put request sense on top
+ * of it. The failed command will be retried after sense data
+ * is acquired.
+ */
+ drive->hwif->rq = NULL;
+ ide_requeue_and_plug(drive, failed_rq);
+ if (ide_queue_sense_rq(drive, pc)) {
+ blk_start_request(failed_rq);
+ ide_complete_rq(drive, -EIO, blk_rq_bytes(failed_rq));
+ }
}
EXPORT_SYMBOL_GPL(ide_retry_pc);
int ide_cd_expiry(ide_drive_t *drive)
{
- struct request *rq = HWGROUP(drive)->rq;
+ struct request *rq = drive->hwif->rq;
unsigned long wait = 0;
debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]);
break;
default:
if (!(rq->cmd_flags & REQ_QUIET))
- printk(KERN_INFO "cmd 0x%x timed out\n",
+ printk(KERN_INFO PFX "cmd 0x%x timed out\n",
rq->cmd[0]);
wait = 0;
break;
return 32768;
else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC)
- return rq->data_len;
+ return blk_rq_bytes(rq);
else
return 0;
}
EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
+void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
+{
+ struct ide_taskfile tf;
+
+ drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT |
+ IDE_VALID_LBAM | IDE_VALID_LBAH);
+
+ *bcount = (tf.lbah << 8) | tf.lbam;
+ *ireason = tf.nsect & 3;
+}
+EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
+
+/*
+ * Check the contents of the interrupt reason register and attempt to recover if
+ * there are problems.
+ *
+ * Returns:
+ * - 0 if everything's ok
+ * - 1 if the request has to be terminated.
+ */
+int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len,
+ int ireason, int rw)
+{
+ ide_hwif_t *hwif = drive->hwif;
+
+ debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw);
+
+ if (ireason == (!rw << 1))
+ return 0;
+ else if (ireason == (rw << 1)) {
+ printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
+ drive->name, __func__);
+
+ if (dev_is_idecd(drive))
+ ide_pad_transfer(drive, rw, len);
+ } else if (!rw && ireason == ATAPI_COD) {
+ if (dev_is_idecd(drive)) {
+ /*
+ * Some drives (ASUS) seem to tell us that status info
+ * is available. Just get it and ignore.
+ */
+ (void)hwif->tp_ops->read_status(hwif);
+ return 0;
+ }
+ } else {
+ if (ireason & ATAPI_COD)
+ printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name,
+ __func__);
+
+ /* drive wants a command packet, or invalid ireason... */
+ printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
+ drive->name, __func__, ireason);
+ }
+
+ if (dev_is_idecd(drive) && rq->cmd_type == REQ_TYPE_ATA_PC)
+ rq->cmd_flags |= REQ_FAILED;
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(ide_check_ireason);
+
/*
* 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)
{
struct ide_atapi_pc *pc = drive->pc;
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->hwgroup->rq;
+ struct ide_cmd *cmd = &hwif->cmd;
+ struct request *rq = hwif->rq;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
- xfer_func_t *xferfunc;
- unsigned int timeout, temp;
+ unsigned int timeout, done;
u16 bcount;
u8 stat, ireason, dsc = 0;
+ u8 write = !!(pc->flags & PC_FLAG_WRITING);
debug_log("Enter %s - interrupt handler\n", __func__);
timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
: WAIT_TAPE_CMD;
- if (pc->flags & PC_FLAG_TIMEDOUT) {
- drive->pc_callback(drive, 0);
- return ide_stopped;
- }
-
/* Clear the interrupt */
stat = tp_ops->read_status(hwif);
if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
- if (hwif->dma_ops->dma_end(drive) ||
- (drive->media == ide_tape && (stat & ATA_ERR))) {
+ int rc;
+
+ drive->waiting_for_dma = 0;
+ rc = hwif->dma_ops->dma_end(drive);
+ ide_dma_unmap_sg(drive, cmd);
+
+ if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) {
if (drive->media == ide_floppy)
- printk(KERN_ERR "%s: DMA %s error\n",
+ printk(KERN_ERR PFX "%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;
- if (drive->pc_update_buffers)
- drive->pc_update_buffers(drive, pc);
- }
+ } else
+ rq->resid_len = 0;
debug_log("%s: DMA finished\n", drive->name);
}
/* No more interrupts */
if ((stat & ATA_DRQ) == 0) {
+ int uptodate, error;
+
debug_log("Packet command completed, %d bytes transferred\n",
- pc->xferred);
+ blk_rq_bytes(rq));
pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
pc->rq->errors++;
if (rq->cmd[0] == REQUEST_SENSE) {
- printk(KERN_ERR "%s: I/O error in request sense"
- " command\n", drive->name);
+ printk(KERN_ERR PFX "%s: I/O error in request "
+ "sense command\n", drive->name);
return ide_do_reset(drive);
}
debug_log("[cmd %x]: check condition\n", rq->cmd[0]);
/* Retry operation */
- ide_retry_pc(drive, rq->rq_disk);
+ ide_retry_pc(drive);
/* queued, but not started */
return ide_stopped;
if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0)
dsc = 1;
+ /*
+ * ->pc_callback() might change rq->data_len for
+ * residual count, cache total length.
+ */
+ done = blk_rq_bytes(rq);
+
/* Command finished - Call the callback function */
- drive->pc_callback(drive, dsc);
+ uptodate = drive->pc_callback(drive, dsc);
+
+ if (uptodate == 0)
+ drive->failed_pc = NULL;
+
+ if (blk_special_request(rq)) {
+ rq->errors = 0;
+ error = 0;
+ } else {
+ if (blk_fs_request(rq) == 0 && uptodate <= 0) {
+ if (rq->errors == 0)
+ rq->errors = -EIO;
+ }
+
+ error = uptodate ? 0 : -EIO;
+ }
+
+ ide_complete_rq(drive, error, blk_rq_bytes(rq));
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);
+ printk(KERN_ERR PFX "%s: The device wants to issue more "
+ "interrupts in DMA mode\n", drive->name);
ide_dma_off(drive);
return ide_do_reset(drive);
}
/* Get the number of bytes to transfer on this interrupt. */
ide_read_bcount_and_ireason(drive, &bcount, &ireason);
- if (ireason & ATAPI_COD) {
- printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__);
+ if (ide_check_ireason(drive, rq, bcount, ireason, write))
return ide_do_reset(drive);
- }
- if (((ireason & ATAPI_IO) == ATAPI_IO) ==
- !!(pc->flags & PC_FLAG_WRITING)) {
- /* Hopefully, we will never get here */
- printk(KERN_ERR "%s: We wanted to %s, but the device wants us "
- "to %s!\n", drive->name,
- (ireason & ATAPI_IO) ? "Write" : "Read",
- (ireason & ATAPI_IO) ? "Read" : "Write");
- return ide_do_reset(drive);
- }
+ done = min_t(unsigned int, bcount, cmd->nleft);
+ ide_pio_bytes(drive, cmd, write, done);
+
+ /* Update transferred byte count */
+ rq->resid_len -= done;
+
+ bcount -= done;
+
+ if (bcount)
+ ide_pad_transfer(drive, write, bcount);
+
+ debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n",
+ rq->cmd[0], done, bcount, rq->resid_len);
- 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);
-
- ide_pad_transfer(drive, 0, bcount);
- goto next_irq;
- }
- debug_log("The device wants to send us more data than "
- "expected - allowing transfer\n");
- }
- xferfunc = tp_ops->input_data;
- } else
- xferfunc = tp_ops->output_data;
-
- if ((drive->media == ide_floppy && !pc->buf) ||
- (drive->media == ide_tape && pc->bh)) {
- int done = drive->pc_io_buffers(drive, pc, bcount,
- !!(pc->flags & PC_FLAG_WRITING));
-
- /* FIXME: don't do partial completions */
- if (drive->media == ide_floppy)
- ide_end_request(drive, 1, done >> 9);
- } else
- 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",
- rq->cmd[0], bcount);
-next_irq:
/* And set the interrupt handler again */
- ide_set_handler(drive, ide_pc_intr, timeout, NULL);
+ ide_set_handler(drive, ide_pc_intr, timeout);
return ide_started;
}
-static u8 ide_read_ireason(ide_drive_t *drive)
+static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf,
+ u16 bcount, u8 dma)
{
- ide_task_t task;
+ cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO;
+ cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM |
+ IDE_VALID_FEATURE | valid_tf;
+ cmd->tf.command = ATA_CMD_PACKET;
+ cmd->tf.feature = dma; /* Use PIO/DMA */
+ cmd->tf.lbam = bcount & 0xff;
+ cmd->tf.lbah = (bcount >> 8) & 0xff;
+}
- memset(&task, 0, sizeof(task));
- task.tf_flags = IDE_TFLAG_IN_NSECT;
+static u8 ide_read_ireason(ide_drive_t *drive)
+{
+ struct ide_taskfile tf;
- drive->hwif->tp_ops->tf_read(drive, &task);
+ drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT);
- return task.tf.nsect & 3;
+ return tf.nsect & 3;
}
static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
while (retries-- && ((ireason & ATAPI_COD) == 0 ||
(ireason & ATAPI_IO))) {
- printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
+ printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing "
"a packet command, retrying\n", drive->name);
udelay(100);
ireason = ide_read_ireason(drive);
if (retries == 0) {
- printk(KERN_ERR "%s: (IO,CoD != (0,1) while issuing "
- "a packet command, ignoring\n",
+ printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing"
+ " a packet command, ignoring\n",
drive->name);
ireason |= ATAPI_COD;
ireason &= ~ATAPI_IO;
static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
{
- struct ide_atapi_pc *pc = drive->pc;
+ struct ide_atapi_pc *uninitialized_var(pc);
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->hwgroup->rq;
+ struct request *rq = hwif->rq;
ide_expiry_t *expiry;
unsigned int timeout;
+ int cmd_len;
ide_startstop_t startstop;
u8 ireason;
if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) {
- printk(KERN_ERR "%s: Strange, packet command initiated yet "
+ printk(KERN_ERR PFX "%s: Strange, packet command initiated yet "
"DRQ isn't asserted\n", drive->name);
return startstop;
}
drive->waiting_for_dma = 1;
}
- 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);
- }
+ 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;
- /*
- * 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;
+ timeout = rq->timeout;
+ expiry = ide_cd_expiry;
} else {
- timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
- : WAIT_TAPE_CMD;
- expiry = NULL;
- }
+ pc = drive->pc;
+
+ cmd_len = ATAPI_MIN_CDB_BYTES;
+
+ /*
+ * If necessary schedule the packet transfer to occur 'timeout'
+ * milliseconds 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;
+ }
- /* Set the interrupt routine */
- ide_set_handler(drive, ide_pc_intr, timeout, expiry);
+ ireason = ide_read_ireason(drive);
+ if (drive->media == ide_tape)
+ ireason = ide_wait_ireason(drive, ireason);
- /* Begin DMA, if necessary */
- if (pc->flags & PC_FLAG_DMA_OK) {
- pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
- hwif->dma_ops->dma_start(drive);
+ if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
+ printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while "
+ "issuing a packet command\n", drive->name);
+
+ return ide_do_reset(drive);
+ }
}
+ hwif->expiry = expiry;
+
+ /* Set the interrupt routine */
+ ide_set_handler(drive,
+ (dev_is_idecd(drive) ? drive->irq_handler
+ : ide_pc_intr),
+ timeout);
+
/* Send the actual packet */
if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
- hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12);
+ hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
+
+ /* Begin DMA, if necessary */
+ 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);
+ }
+ }
return ide_started;
}
-ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout)
+ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
{
- struct ide_atapi_pc *pc = drive->pc;
+ struct ide_atapi_pc *pc;
ide_hwif_t *hwif = drive->hwif;
ide_expiry_t *expiry = NULL;
- u32 tf_flags;
+ struct request *rq = hwif->rq;
+ unsigned int timeout, bytes;
u16 bcount;
-
- /* We haven't transferred any data yet */
- pc->xferred = 0;
- pc->cur_pos = pc->buf;
+ u8 valid_tf;
+ u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT);
if (dev_is_idecd(drive)) {
- tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
- bcount = ide_cd_get_xferlen(hwif->hwgroup->rq);
+ valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL;
+ bcount = ide_cd_get_xferlen(rq);
expiry = ide_cd_expiry;
+ timeout = ATAPI_WAIT_PC;
+
+ if (drive->dma)
+ drive->dma = !ide_dma_prepare(drive, cmd);
} else {
- tf_flags = IDE_TFLAG_OUT_DEVICE;
- bcount = ((drive->media == ide_tape) ?
- pc->req_xfer :
- min(pc->req_xfer, 63 * 1024));
- }
+ pc = drive->pc;
- if (pc->flags & PC_FLAG_DMA_ERROR) {
- pc->flags &= ~PC_FLAG_DMA_ERROR;
- ide_dma_off(drive);
- }
+ valid_tf = IDE_VALID_DEVICE;
+ bytes = blk_rq_bytes(rq);
+ bcount = ((drive->media == ide_tape) ? bytes
+ : min_t(unsigned int,
+ bytes, 63 * 1024));
- if (((pc->flags & PC_FLAG_DMA_OK) &&
- (drive->dev_flags & IDE_DFLAG_USING_DMA)) ||
- drive->dma)
- drive->dma = !hwif->dma_ops->dma_setup(drive);
+ /* We haven't transferred any data yet */
+ rq->resid_len = bcount;
- if (!drive->dma)
- pc->flags &= ~PC_FLAG_DMA_OK;
+ if (pc->flags & PC_FLAG_DMA_ERROR) {
+ pc->flags &= ~PC_FLAG_DMA_ERROR;
+ ide_dma_off(drive);
+ }
- ide_pktcmd_tf_load(drive, tf_flags, bcount, drive->dma);
+ if (pc->flags & PC_FLAG_DMA_OK)
+ drive->dma = !ide_dma_prepare(drive, cmd);
- /* Issue the packet command */
- if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+ if (!drive->dma)
+ pc->flags &= ~PC_FLAG_DMA_OK;
+
+ timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+ : WAIT_TAPE_CMD;
+ }
+
+ ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma);
+
+ (void)do_rw_taskfile(drive, cmd);
+
+ if (drq_int) {
if (drive->dma)
drive->waiting_for_dma = 0;
- ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc,
- timeout, expiry);
- return ide_started;
- } else {
- ide_execute_pkt_cmd(drive);
- return ide_transfer_pc(drive);
+ hwif->expiry = expiry;
}
+
+ ide_execute_command(drive, cmd, ide_transfer_pc, timeout);
+
+ return drq_int ? ide_started : ide_transfer_pc(drive);
}
EXPORT_SYMBOL_GPL(ide_issue_pc);