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path: root/drivers/ide/ide-atapi.c
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Diffstat (limited to 'drivers/ide/ide-atapi.c')
-rw-r--r--drivers/ide/ide-atapi.c116
1 files changed, 86 insertions, 30 deletions
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index e9d042dba0e..2fb5d28a9be 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -149,7 +149,10 @@ static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
- ide_do_drive_cmd(drive, rq);
+
+ drive->hwif->rq = NULL;
+
+ elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
}
/*
@@ -297,6 +300,21 @@ int ide_cd_get_xferlen(struct request *rq)
}
EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
+void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
+{
+ struct ide_cmd cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
+ IDE_TFLAG_IN_NSECT;
+
+ drive->hwif->tp_ops->tf_read(drive, &cmd);
+
+ *bcount = (cmd.tf.lbah << 8) | cmd.tf.lbam;
+ *ireason = cmd.tf.nsect & 3;
+}
+EXPORT_SYMBOL_GPL(ide_read_bcount_and_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)
@@ -318,11 +336,6 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
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);
@@ -344,6 +357,8 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
/* No more interrupts */
if ((stat & ATA_DRQ) == 0) {
+ int uptodate;
+
debug_log("Packet command completed, %d bytes transferred\n",
pc->xferred);
@@ -382,7 +397,22 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
dsc = 1;
/* 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;
+ ide_complete_rq(drive, 0, blk_rq_bytes(rq));
+ } else {
+ if (blk_fs_request(rq) == 0 && uptodate <= 0) {
+ if (rq->errors == 0)
+ rq->errors = -EIO;
+ }
+ ide_complete_rq(drive, uptodate ? 0 : -EIO,
+ ide_rq_bytes(rq));
+ }
return ide_stopped;
}
@@ -440,7 +470,8 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
/* FIXME: don't do partial completions */
if (drive->media == ide_floppy)
- ide_end_request(drive, 1, done >> 9);
+ ide_complete_rq(drive, 0,
+ done ? done : ide_rq_bytes(rq));
} else
xferfunc(drive, NULL, pc->cur_pos, bcount);
@@ -452,20 +483,32 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
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 void ide_init_packet_cmd(struct ide_cmd *cmd, u32 tf_flags,
+ u16 bcount, u8 dma)
+{
+ 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;
+ cmd->tf.command = ATA_CMD_PACKET;
+ cmd->tf.feature = dma; /* Use PIO/DMA */
+ cmd->tf.lbam = bcount & 0xff;
+ cmd->tf.lbah = (bcount >> 8) & 0xff;
+}
+
static u8 ide_read_ireason(ide_drive_t *drive)
{
- ide_task_t task;
+ struct ide_cmd cmd;
- memset(&task, 0, sizeof(task));
- task.tf_flags = IDE_TFLAG_IN_NSECT;
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.tf_flags = IDE_TFLAG_IN_NSECT;
- drive->hwif->tp_ops->tf_read(drive, &task);
+ drive->hwif->tp_ops->tf_read(drive, &cmd);
- return task.tf.nsect & 3;
+ return cmd.tf.nsect & 3;
}
static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
@@ -560,11 +603,13 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
}
}
+ hwif->expiry = expiry;
+
/* Set the interrupt routine */
ide_set_handler(drive,
(dev_is_idecd(drive) ? drive->irq_handler
: ide_pc_intr),
- timeout, expiry);
+ timeout);
/* Begin DMA, if necessary */
if (dev_is_idecd(drive)) {
@@ -584,23 +629,30 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
return ide_started;
}
-ide_startstop_t ide_issue_pc(ide_drive_t *drive)
+ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
{
struct ide_atapi_pc *pc;
ide_hwif_t *hwif = drive->hwif;
+ const struct ide_dma_ops *dma_ops = hwif->dma_ops;
ide_expiry_t *expiry = NULL;
+ struct request *rq = hwif->rq;
unsigned int timeout;
u32 tf_flags;
u16 bcount;
+ 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->rq);
+ bcount = ide_cd_get_xferlen(rq);
expiry = ide_cd_expiry;
timeout = ATAPI_WAIT_PC;
- if (drive->dma)
- drive->dma = !hwif->dma_ops->dma_setup(drive);
+ if (drive->dma) {
+ if (ide_build_sglist(drive, cmd))
+ drive->dma = !dma_ops->dma_setup(drive, cmd);
+ else
+ drive->dma = 0;
+ }
} else {
pc = drive->pc;
@@ -619,8 +671,12 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive)
}
if ((pc->flags & PC_FLAG_DMA_OK) &&
- (drive->dev_flags & IDE_DFLAG_USING_DMA))
- drive->dma = !hwif->dma_ops->dma_setup(drive);
+ (drive->dev_flags & IDE_DFLAG_USING_DMA)) {
+ if (ide_build_sglist(drive, cmd))
+ drive->dma = !dma_ops->dma_setup(drive, cmd);
+ else
+ drive->dma = 0;
+ }
if (!drive->dma)
pc->flags &= ~PC_FLAG_DMA_OK;
@@ -629,18 +685,18 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive)
: WAIT_TAPE_CMD;
}
- ide_pktcmd_tf_load(drive, tf_flags, bcount, drive->dma);
+ ide_init_packet_cmd(cmd, tf_flags, bcount, drive->dma);
- /* Issue the packet command */
- if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+ (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);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-26 04:17:13 +0000