aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/ide/ide-cd.c146
-rw-r--r--drivers/ide/ide-taskfile.c5
-rw-r--r--include/linux/ide.h4
3 files changed, 50 insertions, 105 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 30113e69c8b..5f15859c2c7 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -539,64 +539,12 @@ static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
{
ide_debug_log(IDE_DBG_RQ, "rq->cmd_flags: 0x%x", rq->cmd_flags);
- if (rq_data_dir(rq) == READ) {
- unsigned short sectors_per_frame =
- queue_hardsect_size(drive->queue) >> SECTOR_BITS;
- int nskip = rq->sector & (sectors_per_frame - 1);
-
- /*
- * If the requested sector doesn't start on a frame boundary,
- * we must adjust the start of the transfer so that it does,
- * and remember to skip the first few sectors.
- *
- * If the rq->current_nr_sectors field is larger than the size
- * of the buffer, it will mean that we're to skip a number of
- * sectors equal to the amount by which rq->current_nr_sectors
- * is larger than the buffer size.
- */
- if (nskip > 0) {
- /* sanity check... */
- if (rq->current_nr_sectors !=
- bio_cur_sectors(rq->bio)) {
- printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n",
- drive->name, __func__,
- rq->current_nr_sectors);
- return ide_stopped;
- }
- rq->current_nr_sectors += nskip;
- }
- }
-
/* set up the command */
rq->timeout = ATAPI_WAIT_PC;
return ide_started;
}
-/*
- * Fix up a possibly partially-processed request so that we can start it over
- * entirely, or even put it back on the request queue.
- */
-static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq)
-{
-
- ide_debug_log(IDE_DBG_FUNC, "enter");
-
- if (rq->buffer != bio_data(rq->bio)) {
- sector_t n =
- (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE;
-
- rq->buffer = bio_data(rq->bio);
- rq->nr_sectors += n;
- rq->sector -= n;
- }
- rq->current_nr_sectors = bio_cur_sectors(rq->bio);
- rq->hard_cur_sectors = rq->current_nr_sectors;
- rq->hard_nr_sectors = rq->nr_sectors;
- rq->hard_sector = rq->sector;
- rq->q->prep_rq_fn(rq->q, rq);
-}
-
static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq)
{
ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
@@ -690,6 +638,17 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
return (flags & REQ_FAILED) ? -EIO : 0;
}
+static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
+
+ if (cmd->tf_flags & IDE_TFLAG_WRITE)
+ nr_bytes -= cmd->last_xfer_len;
+
+ if (nr_bytes > 0)
+ ide_complete_rq(drive, 0, nr_bytes);
+}
+
/*
* Called from blk_end_request_callback() after the data of the request is
* completed and before the request itself is completed. By returning value '1',
@@ -703,6 +662,7 @@ static int cdrom_newpc_intr_dummy_cb(struct request *rq)
static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
struct request *rq = hwif->rq;
xfer_func_t *xferfunc;
ide_expiry_t *expiry = NULL;
@@ -769,11 +729,10 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
* Otherwise, complete the command normally.
*/
uptodate = 1;
- if (rq->current_nr_sectors > 0) {
+ if (cmd->nleft > 0) {
printk(KERN_ERR PFX "%s: %s: data underrun "
- "(%d blocks)\n",
- drive->name, __func__,
- rq->current_nr_sectors);
+ "(%u bytes)\n", drive->name, __func__,
+ cmd->nleft);
if (!write)
rq->cmd_flags |= REQ_FAILED;
uptodate = 0;
@@ -795,24 +754,10 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
if (blk_fs_request(rq)) {
if (write == 0) {
- int nskip;
-
if (ide_cd_check_transfer_size(drive, len))
goto out_end;
-
- /*
- * First, figure out if we need to bit-bucket
- * any of the leading sectors.
- */
- nskip = min_t(int, rq->current_nr_sectors
- - bio_cur_sectors(rq->bio),
- thislen >> 9);
- if (nskip > 0) {
- ide_pad_transfer(drive, write, nskip << 9);
- rq->current_nr_sectors -= nskip;
- thislen -= (nskip << 9);
- }
}
+ cmd->last_xfer_len = 0;
}
if (ireason == 0) {
@@ -835,15 +780,15 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
/* bio backed? */
if (rq->bio) {
if (blk_fs_request(rq)) {
- ptr = rq->buffer;
- blen = rq->current_nr_sectors << 9;
+ blen = min_t(int, thislen, cmd->nleft);
} else {
ptr = bio_data(rq->bio);
blen = bio_iovec(rq->bio)->bv_len;
}
}
- if (!ptr) {
+ if ((blk_fs_request(rq) && cmd->nleft == 0) ||
+ (blk_fs_request(rq) == 0 && ptr == NULL)) {
if (blk_fs_request(rq) && !write)
/*
* If the buffers are full, pipe the rest into
@@ -863,26 +808,16 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
if (blen > thislen)
blen = thislen;
- xferfunc(drive, NULL, ptr, blen);
+ if (blk_fs_request(rq)) {
+ ide_pio_bytes(drive, cmd, write, blen);
+ cmd->last_xfer_len += blen;
+ } else
+ xferfunc(drive, NULL, ptr, blen);
thislen -= blen;
len -= blen;
- if (blk_fs_request(rq)) {
- rq->buffer += blen;
- rq->nr_sectors -= (blen >> 9);
- rq->current_nr_sectors -= (blen >> 9);
- rq->sector += (blen >> 9);
-
- if (rq->current_nr_sectors == 0 && rq->nr_sectors) {
- nsectors = rq->hard_cur_sectors;
-
- if (nsectors == 0)
- nsectors = 1;
-
- ide_complete_rq(drive, 0, nsectors << 9);
- }
- } else {
+ if (blk_fs_request(rq) == 0) {
rq->data_len -= blen;
/*
@@ -933,8 +868,10 @@ out_end:
ide_cd_complete_failed_rq(drive, rq);
if (blk_fs_request(rq)) {
- if (rq->current_nr_sectors == 0)
+ if (cmd->nleft == 0)
uptodate = 1;
+ if (uptodate == 0)
+ ide_cd_error_cmd(drive, cmd);
} else {
if (uptodate <= 0 && rq->errors == 0)
rq->errors = -EIO;
@@ -944,7 +881,7 @@ out_end:
if (blk_pc_request(rq))
nsectors = (rq->data_len + 511) >> 9;
else
- nsectors = rq->hard_cur_sectors;
+ nsectors = rq->hard_nr_sectors;
if (nsectors == 0)
nsectors = 1;
@@ -960,9 +897,10 @@ out_end:
static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *cd = drive->driver_data;
+ struct request_queue *q = drive->queue;
int write = rq_data_dir(rq) == WRITE;
unsigned short sectors_per_frame =
- queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+ queue_hardsect_size(q) >> SECTOR_BITS;
ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, write: 0x%x, "
"secs_per_frame: %u",
@@ -977,17 +915,16 @@ static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
* We may be retrying this request after an error. Fix up any
* weirdness which might be present in the request packet.
*/
- ide_cd_restore_request(drive, rq);
+ q->prep_rq_fn(q, rq);
}
- /* use DMA, if possible / writes *must* be hardware frame aligned */
+ /* fs requests *must* be hardware frame aligned */
if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
- (rq->sector & (sectors_per_frame - 1))) {
- if (write)
- return ide_stopped;
- drive->dma = 0;
- } else
- drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+ (rq->sector & (sectors_per_frame - 1)))
+ return ide_stopped;
+
+ /* use DMA, if possible */
+ drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
if (write)
cd->devinfo.media_written = 1;
@@ -1050,8 +987,6 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
if (blk_fs_request(rq)) {
if (cdrom_start_rw(drive, rq) == ide_stopped ||
ide_cd_prepare_rw_request(drive, rq) == ide_stopped) {
- if (rq->current_nr_sectors == 0)
- uptodate = 1;
goto out_end;
}
} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
@@ -1078,6 +1013,11 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
cmd.rq = rq;
+ if (blk_fs_request(rq)) {
+ ide_init_sg_cmd(&cmd, rq->nr_sectors << 9);
+ ide_map_sg(drive, &cmd);
+ }
+
return ide_issue_pc(drive, &cmd);
out_end:
nsectors = rq->hard_nr_sectors;
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 0e333ecf2ad..a3b7a50562b 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -188,8 +188,8 @@ static u8 wait_drive_not_busy(ide_drive_t *drive)
return stat;
}
-static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
- unsigned int write, unsigned int len)
+void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
+ unsigned int write, unsigned int len)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
@@ -243,6 +243,7 @@ static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
len -= nr_bytes;
}
}
+EXPORT_SYMBOL_GPL(ide_pio_bytes);
static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
unsigned int write)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index d5d832271f4..c2841c0c36c 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -352,6 +352,8 @@ struct ide_cmd {
unsigned int nbytes;
unsigned int nleft;
+ unsigned int last_xfer_len;
+
struct scatterlist *cursg;
unsigned int cursg_ofs;
@@ -1226,6 +1228,8 @@ ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_cmd *);
ide_startstop_t do_rw_taskfile(ide_drive_t *, struct ide_cmd *);
+void ide_pio_bytes(ide_drive_t *, struct ide_cmd *, unsigned int, unsigned int);
+
void ide_finish_cmd(ide_drive_t *, struct ide_cmd *, u8);
int ide_raw_taskfile(ide_drive_t *, struct ide_cmd *, u8 *, u16);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 08:11:10 +0000