cdrom_analyze_sense_data(drive, NULL, sense);
}
-static void cdrom_end_request(ide_drive_t *drive, int uptodate)
-{
- struct request *rq = drive->hwif->rq;
- int nsectors = rq->hard_cur_sectors;
-
- ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, uptodate: 0x%x, nsectors: %d",
- rq->cmd[0], uptodate, nsectors);
-
- if (blk_sense_request(rq) && uptodate)
- ide_cd_complete_failed_rq(drive, rq);
-
- if (!rq->current_nr_sectors && blk_fs_request(rq))
- uptodate = 1;
- /* make sure it's fully ended */
- if (blk_pc_request(rq))
- nsectors = (rq->data_len + 511) >> 9;
- if (!nsectors)
- nsectors = 1;
-
- ide_debug_log(IDE_DBG_FUNC, "uptodate: 0x%x, nsectors: %d",
- uptodate, nsectors);
-
- if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
- rq->errors = -EIO;
-
- ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
-}
-
/*
* Returns:
* 0: if the request should be continued.
- * 1: if the request was ended.
+ * 1: if the request will be going through error recovery.
+ * 2: if the request should be ended.
*/
static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
{
* Just give up.
*/
rq->cmd_flags |= REQ_FAILED;
- cdrom_end_request(drive, 0);
- ide_error(drive, "request sense failure", stat);
- return 1;
-
+ return 2;
} else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
/* All other functions, except for READ. */
*/
if (stat & ATA_ERR)
cdrom_queue_request_sense(drive, NULL, NULL);
+ return 1;
} else {
blk_dump_rq_flags(rq, PFX "bad rq");
- cdrom_end_request(drive, 0);
+ return 2;
}
- /* retry, or handle the next request */
- return 1;
-
end_request:
if (stat & ATA_ERR) {
struct request_queue *q = drive->queue;
hwif->rq = NULL;
cdrom_queue_request_sense(drive, rq->sense, rq);
+ return 1;
} else
- cdrom_end_request(drive, 0);
-
- return 1;
+ return 2;
}
/*
if (rq->cmd_type == REQ_TYPE_ATA_PC)
rq->cmd_flags |= REQ_FAILED;
- cdrom_end_request(drive, 0);
return -1;
}
-/*
- * Assume that the drive will always provide data in multiples of at least
- * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
- */
-static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
-{
- ide_debug_log(IDE_DBG_FUNC, "len: %d", len);
-
- if ((len % SECTOR_SIZE) == 0)
- return 0;
-
- printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name,
- __func__, len);
-
- if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES)
- printk(KERN_ERR PFX "This drive is not supported by this "
- "version of the driver\n");
- else {
- printk(KERN_ERR PFX "Trying to limit transfer sizes\n");
- drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES;
- }
-
- return 1;
-}
-
-static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive,
- struct request *rq)
-{
- 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)
+static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
{
+ struct request *rq = cmd->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]);
/*
* and some drives don't send them. Sigh.
*/
if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
- rq->data_len > 0 && rq->data_len <= 5)
- while (rq->data_len > 0) {
- *(u8 *)rq->data++ = 0;
- --rq->data_len;
+ cmd->nleft > 0 && cmd->nleft <= 5) {
+ unsigned int ofs = cmd->nbytes - cmd->nleft;
+
+ while (cmd->nleft > 0) {
+ *((u8 *)rq->data + ofs++) = 0;
+ cmd->nleft--;
}
+ }
}
int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
return (flags & REQ_FAILED) ? -EIO : 0;
}
-/*
- * 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',
- * blk_end_request_callback() returns immediately without completing it.
- */
-static int cdrom_newpc_intr_dummy_cb(struct request *rq)
+static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
{
- return 1;
+ 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);
}
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;
int dma_error = 0, dma, stat, thislen, uptodate = 0;
- int write = (rq_data_dir(rq) == WRITE) ? 1 : 0;
+ int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors;
+ int sense = blk_sense_request(rq);
unsigned int timeout;
u16 len;
u8 ireason;
}
}
- if (cdrom_decode_status(drive, 0, &stat))
+ rc = cdrom_decode_status(drive, 0, &stat);
+ if (rc) {
+ if (rc == 2)
+ goto out_end;
return ide_stopped;
+ }
/* using dma, transfer is complete now */
if (dma) {
if (dma_error)
return ide_error(drive, "dma error", stat);
- if (blk_fs_request(rq)) {
- ide_complete_rq(drive, 0, rq->nr_sectors
- ? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
- return ide_stopped;
- } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
- ide_complete_rq(drive, 0, 512);
- return ide_stopped;
- }
- goto end_request;
+ uptodate = 1;
+ goto out_end;
}
ide_read_bcount_and_ireason(drive, &len, &ireason);
- thislen = blk_fs_request(rq) ? len : rq->data_len;
+ thislen = blk_fs_request(rq) ? len : cmd->nleft;
if (thislen > len)
thislen = len;
* 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;
}
- cdrom_end_request(drive, uptodate);
- return ide_stopped;
} else if (!blk_pc_request(rq)) {
- ide_cd_request_sense_fixup(drive, rq);
+ ide_cd_request_sense_fixup(drive, cmd);
/* complain if we still have data left to transfer */
- uptodate = rq->data_len ? 0 : 1;
+ uptodate = cmd->nleft ? 0 : 1;
+ if (uptodate == 0)
+ rq->cmd_flags |= REQ_FAILED;
}
- goto end_request;
+ goto out_end;
}
/* check which way to transfer data */
- if (ide_cd_check_ireason(drive, rq, len, ireason, write))
- return ide_stopped;
-
- if (blk_fs_request(rq)) {
- if (write == 0) {
- int nskip;
-
- if (ide_cd_check_transfer_size(drive, len)) {
- cdrom_end_request(drive, 0);
- return ide_stopped;
- }
-
- /*
- * 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);
- }
- }
- }
+ rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
+ if (rc)
+ goto out_end;
- if (ireason == 0) {
- write = 1;
- xferfunc = hwif->tp_ops->output_data;
- } else {
- write = 0;
- xferfunc = hwif->tp_ops->input_data;
- }
+ cmd->last_xfer_len = 0;
ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
"ireason: 0x%x",
/* transfer data */
while (thislen > 0) {
- u8 *ptr = blk_fs_request(rq) ? NULL : rq->data;
- int blen = rq->data_len;
-
- /* bio backed? */
- if (rq->bio) {
- if (blk_fs_request(rq)) {
- ptr = rq->buffer;
- blen = rq->current_nr_sectors << 9;
- } else {
- ptr = bio_data(rq->bio);
- blen = bio_iovec(rq->bio)->bv_len;
- }
- }
+ int blen = min_t(int, thislen, cmd->nleft);
- if (!ptr) {
+ if (cmd->nleft == 0) {
if (blk_fs_request(rq) && !write)
/*
* If the buffers are full, pipe the rest into
break;
}
- if (blen > thislen)
- blen = thislen;
-
- xferfunc(drive, NULL, ptr, blen);
+ ide_pio_bytes(drive, cmd, write, blen);
+ cmd->last_xfer_len += 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)
- cdrom_end_request(drive, 1);
- } else {
- rq->data_len -= blen;
-
- /*
- * The request can't be completed until DRQ is cleared.
- * So complete the data, but don't complete the request
- * using the dummy function for the callback feature
- * of blk_end_request_callback().
- */
- if (rq->bio)
- blk_end_request_callback(rq, 0, blen,
- cdrom_newpc_intr_dummy_cb);
- else
- rq->data += blen;
- }
- if (!write && blk_sense_request(rq))
+ if (sense && write == 0)
rq->sense_len += blen;
}
ide_set_handler(drive, cdrom_newpc_intr, timeout);
return ide_started;
-end_request:
- if (blk_pc_request(rq)) {
+out_end:
+ if (blk_pc_request(rq) && rc == 0) {
unsigned int dlen = rq->data_len;
- if (dma)
- rq->data_len = 0;
+ rq->data_len = 0;
if (blk_end_request(rq, 0, dlen))
BUG();
hwif->rq = NULL;
} else {
- if (!uptodate)
- rq->cmd_flags |= REQ_FAILED;
- cdrom_end_request(drive, uptodate);
+ if (sense && uptodate)
+ ide_cd_complete_failed_rq(drive, rq);
+
+ if (blk_fs_request(rq)) {
+ if (cmd->nleft == 0)
+ uptodate = 1;
+ } else {
+ if (uptodate <= 0 && rq->errors == 0)
+ rq->errors = -EIO;
+ }
+
+ if (uptodate == 0)
+ ide_cd_error_cmd(drive, cmd);
+
+ /* make sure it's fully ended */
+ if (blk_pc_request(rq))
+ nsectors = (rq->data_len + 511) >> 9;
+ else
+ nsectors = rq->hard_nr_sectors;
+
+ if (nsectors == 0)
+ nsectors = 1;
+
+ if (blk_fs_request(rq) == 0) {
+ rq->data_len -= (cmd->nbytes - cmd->nleft);
+ if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
+ rq->data_len += cmd->last_xfer_len;
+ }
+
+ ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
+
+ if (sense && rc == 2)
+ ide_error(drive, "request sense failure", stat);
}
return ide_stopped;
}
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, "
+ ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
"secs_per_frame: %u",
- rq->cmd[0], write, sectors_per_frame);
+ rq->cmd[0], rq->cmd_flags, sectors_per_frame);
if (write) {
/* disk has become write protected */
* 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;
+ rq->timeout = ATAPI_WAIT_PC;
+
return ide_started;
}
sector_t block)
{
struct ide_cmd cmd;
- int uptodate = 0;
+ int uptodate = 0, nsectors;
ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
rq->cmd[0], (unsigned long long)block);
blk_dump_rq_flags(rq, "ide_cd_do_request");
if (blk_fs_request(rq)) {
- if (cdrom_start_rw(drive, rq) == ide_stopped ||
- ide_cd_prepare_rw_request(drive, rq) == ide_stopped)
+ if (cdrom_start_rw(drive, rq) == ide_stopped)
goto out_end;
} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC) {
goto out_end;
} else {
blk_dump_rq_flags(rq, DRV_NAME " bad flags");
+ if (rq->errors == 0)
+ rq->errors = -EIO;
goto out_end;
}
cmd.rq = rq;
+ if (blk_fs_request(rq) || rq->data_len) {
+ ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
+ : rq->data_len);
+ ide_map_sg(drive, &cmd);
+ }
+
return ide_issue_pc(drive, &cmd);
out_end:
- cdrom_end_request(drive, uptodate);
+ nsectors = rq->hard_nr_sectors;
+
+ if (nsectors == 0)
+ nsectors = 1;
+
+ ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
+
return ide_stopped;
}
#endif
static const struct cd_list_entry ide_cd_quirks_list[] = {
- /* Limit transfer size per interrupt. */
- { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES },
- { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES },
/* SCR-3231 doesn't support the SET_CD_SPEED command. */
{ "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
/* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
projects / linux-2.6-omap-h63xx.git / blobdiff