From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: use do_rw_taskfile() for ATA_CMD_PACKET commands
* Pass command to ide_issue_pc() and update ->do_request methods
in ide-{cd,floppy,tape}.c accordingly.
* Convert ide_pktcmd_tf_load() to ide_init_packet_cmd() which
just initializes command structure and use do_rw_taskfile()
to load ATA_CMD_PACKET commands.
While at it:
* Rename ide{floppy,tape}_issue_pc() to ide_{floppy,tape}_issue_pc().
There should be no functional changes caused by this patch.
Cc: Borislav Petkov <petkovbb@xxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/ide-atapi.c | 37 ++++++++++++-------------------------
drivers/ide/ide-cd.c | 11 ++++++++++-
drivers/ide/ide-floppy.c | 24 ++++++++++++++----------
drivers/ide/ide-tape.c | 19 ++++++++++++++-----
drivers/ide/ide-taskfile.c | 3 ++-
include/linux/ide.h | 2 +-
6 files changed, 53 insertions(+), 43 deletions(-)
Index: b/drivers/ide/ide-atapi.c
===================================================================
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -475,23 +475,15 @@ next_irq:
return ide_started;
}
-static void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount)
+static void ide_init_packet_cmd(struct ide_cmd *cmd, u32 tf_flags,
+ u16 bcount, u8 dma)
{
- ide_hwif_t *hwif = drive->hwif;
- struct ide_cmd cmd;
- u8 dma = drive->dma;
-
- memset(&cmd, 0, sizeof(cmd));
- cmd.tf_flags = IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM |
- IDE_TFLAG_OUT_FEATURE | tf_flags;
- cmd.tf.feature = dma; /* Use PIO/DMA */
- cmd.tf.lbam = bcount & 0xff;
- cmd.tf.lbah = (bcount >> 8) & 0xff;
-
- ide_tf_dump(drive->name, &cmd.tf);
- hwif->tp_ops->set_irq(hwif, 1);
- SELECT_MASK(drive, 0);
- hwif->tp_ops->tf_load(drive, &cmd);
+ 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.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)
@@ -622,24 +614,17 @@ static ide_startstop_t ide_transfer_pc(i
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;
- struct ide_cmd *cmd = &hwif->cmd;
ide_expiry_t *expiry = NULL;
struct request *rq = hwif->rq;
unsigned int timeout;
u32 tf_flags;
u16 bcount;
- if (drive->media != ide_floppy) {
- if (rq_data_dir(rq))
- cmd->tf_flags |= IDE_TFLAG_WRITE;
- cmd->rq = rq;
- }
-
if (dev_is_idecd(drive)) {
tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
bcount = ide_cd_get_xferlen(rq);
@@ -684,7 +669,9 @@ ide_startstop_t ide_issue_pc(ide_drive_t
: WAIT_TAPE_CMD;
}
- ide_pktcmd_tf_load(drive, tf_flags, bcount);
+ ide_init_packet_cmd(cmd, tf_flags, bcount, drive->dma);
+
+ (void)do_rw_taskfile(drive, cmd);
/* Issue the packet command */
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1060,6 +1060,8 @@ static void cdrom_do_block_pc(ide_drive_
static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
sector_t block)
{
+ struct ide_cmd cmd;
+
ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
rq->cmd[0], (unsigned long long)block);
@@ -1088,7 +1090,14 @@ static ide_startstop_t ide_cd_do_request
return ide_stopped;
}
- return ide_issue_pc(drive);
+ memset(&cmd, 0, sizeof(cmd));
+
+ if (rq_data_dir(rq))
+ cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+ cmd.rq = rq;
+
+ return ide_issue_pc(drive, &cmd);
}
/*
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -130,8 +130,9 @@ static void ide_floppy_report_error(stru
}
-static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
- struct ide_atapi_pc *pc)
+static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
+ struct ide_cmd *cmd,
+ struct ide_atapi_pc *pc)
{
struct ide_disk_obj *floppy = drive->driver_data;
@@ -157,7 +158,7 @@ static ide_startstop_t idefloppy_issue_p
pc->retries++;
- return ide_issue_pc(drive);
+ return ide_issue_pc(drive, cmd);
}
void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
@@ -244,7 +245,7 @@ static ide_startstop_t ide_floppy_do_req
{
struct ide_disk_obj *floppy = drive->driver_data;
ide_hwif_t *hwif = drive->hwif;
- struct ide_cmd *cmd = &hwif->cmd;
+ struct ide_cmd cmd;
struct ide_atapi_pc *pc;
if (drive->debug_mask & IDE_DBG_RQ)
@@ -285,19 +286,22 @@ static ide_startstop_t ide_floppy_do_req
goto out_end;
}
+ memset(&cmd, 0, sizeof(cmd));
+
if (rq_data_dir(rq))
- cmd->tf_flags |= IDE_TFLAG_WRITE;
- cmd->rq = rq;
+ cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+ cmd.rq = rq;
- ide_init_sg_cmd(cmd, rq->nr_sectors);
- ide_map_sg(drive, cmd);
+ ide_init_sg_cmd(&cmd, rq->nr_sectors);
+ ide_map_sg(drive, &cmd);
pc->sg = hwif->sg_table;
- pc->sg_cnt = cmd->sg_nents;
+ pc->sg_cnt = cmd.sg_nents;
pc->rq = rq;
- return idefloppy_issue_pc(drive, pc);
+ return ide_floppy_issue_pc(drive, &cmd, pc);
out_end:
drive->failed_pc = NULL;
if (blk_fs_request(rq) == 0 && rq->errors == 0)
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -580,7 +580,7 @@ static int ide_tape_io_buffers(ide_drive
*
* The handling will be done in three stages:
*
- * 1. idetape_issue_pc will send the packet command to the drive, and will set
+ * 1. ide_tape_issue_pc will send the packet command to the drive, and will set
* the interrupt handler to ide_pc_intr.
*
* 2. On each interrupt, ide_pc_intr will be called. This step will be
@@ -608,8 +608,9 @@ static int ide_tape_io_buffers(ide_drive
* request.
*/
-static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
- struct ide_atapi_pc *pc)
+static ide_startstop_t ide_tape_issue_pc(ide_drive_t *drive,
+ struct ide_cmd *cmd,
+ struct ide_atapi_pc *pc)
{
idetape_tape_t *tape = drive->driver_data;
@@ -654,7 +655,7 @@ static ide_startstop_t idetape_issue_pc(
pc->retries++;
- return ide_issue_pc(drive);
+ return ide_issue_pc(drive, cmd);
}
/* A mode sense command is used to "sense" tape parameters. */
@@ -749,6 +750,7 @@ static ide_startstop_t idetape_do_reques
idetape_tape_t *tape = drive->driver_data;
struct ide_atapi_pc *pc = NULL;
struct request *postponed_rq = tape->postponed_rq;
+ struct ide_cmd cmd;
u8 stat;
debug_log(DBG_SENSE, "sector: %llu, nr_sectors: %lu,"
@@ -844,7 +846,14 @@ static ide_startstop_t idetape_do_reques
BUG();
out:
- return idetape_issue_pc(drive, pc);
+ memset(&cmd, 0, sizeof(cmd));
+
+ if (rq_data_dir(rq))
+ cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+ cmd.rq = rq;
+
+ return ide_tape_issue_pc(drive, &cmd, pc);
}
/*
Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -100,13 +100,14 @@ ide_startstop_t do_rw_taskfile(ide_drive
ide_execute_command(drive, tf->command, handler,
WAIT_WORSTCASE, NULL);
return ide_started;
- default:
+ case ATA_PROT_DMA:
if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
ide_build_sglist(drive, cmd) == 0 ||
dma_ops->dma_setup(drive, cmd))
return ide_stopped;
dma_ops->dma_exec_cmd(drive, tf->command);
dma_ops->dma_start(drive);
+ default:
return ide_started;
}
}
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1223,7 +1223,7 @@ int ide_cd_expiry(ide_drive_t *);
int ide_cd_get_xferlen(struct request *);
-ide_startstop_t ide_issue_pc(ide_drive_t *);
+ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_cmd *);
ide_startstop_t do_rw_taskfile(ide_drive_t *, struct ide_cmd *);
--
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