[PATCH 04/14] ide: pass command instead of request to ide_pio_datablock()

From: Bartlomiej Zolnierkiewicz
Date: Mon Feb 02 2009 - 16:39:43 EST

From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: pass command instead of request to ide_pio_datablock()

* Add IDE_TFLAG_FS taskfile flag and set it for REQ_TYPE_FS requests.

* Convert ->{in,out}put_data methods to take command instead of request
as an argument. Then convert pre_task_out_intr(), task_end_request(),
task_error(), task_in_unexpected(), ide_pio_sector(), ide_pio_multi()
and ide_pio_datablock() in similar way.

* Rename task_end_request() to ide_finish_cmd().

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/au1xxx-ide.c | 4 +-
drivers/ide/falconide.c | 8 ++--
drivers/ide/ide-disk.c | 2 +
drivers/ide/ide-dma.c | 4 +-
drivers/ide/ide-h8300.c | 4 +-
drivers/ide/ide-io-std.c | 4 +-
drivers/ide/ide-taskfile.c | 88 +++++++++++++++++++++------------------------
drivers/ide/q40ide.c | 8 ++--
drivers/ide/scc_pata.c | 4 +-
drivers/ide/tx4938ide.c | 4 +-
include/linux/ide.h | 17 ++++----
11 files changed, 74 insertions(+), 73 deletions(-)

Index: b/drivers/ide/au1xxx-ide.c
===================================================================
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -86,13 +86,13 @@ void auide_outsw(unsigned long port, voi
ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
}

-static void au1xxx_input_data(ide_drive_t *drive, struct request *rq,
+static void au1xxx_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
auide_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
}

-static void au1xxx_output_data(ide_drive_t *drive, struct request *rq,
+static void au1xxx_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
auide_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
Index: b/drivers/ide/falconide.c
===================================================================
--- a/drivers/ide/falconide.c
+++ b/drivers/ide/falconide.c
@@ -62,23 +62,23 @@ static void falconide_get_lock(irq_handl
}
}

-static void falconide_input_data(ide_drive_t *drive, struct request *rq,
+static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;

- if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+ if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS))
return insw(data_addr, buf, (len + 1) / 2);

raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
}

-static void falconide_output_data(ide_drive_t *drive, struct request *rq,
+static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;

- if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+ if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS))
return outsw(data_addr, buf, (len + 1) / 2);

raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
Index: b/drivers/ide/ide-disk.c
===================================================================
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -156,6 +156,8 @@ static ide_startstop_t __ide_do_rw_disk(
tf->device = head;
}

+ cmd.tf_flags |= IDE_TFLAG_FS;
+
if (rq_data_dir(rq))
cmd.tf_flags |= IDE_TFLAG_WRITE;

Index: b/drivers/ide/ide-dma.c
===================================================================
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -96,9 +96,9 @@ ide_startstop_t ide_dma_intr(ide_drive_t

if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
if (!dma_stat) {
- struct request *rq = hwif->rq;
+ struct ide_cmd *cmd = &hwif->cmd;

- task_end_request(drive, rq, stat);
+ ide_finish_cmd(drive, cmd, stat);
return ide_stopped;
}
printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
Index: b/drivers/ide/ide-h8300.c
===================================================================
--- a/drivers/ide/ide-h8300.c
+++ b/drivers/ide/ide-h8300.c
@@ -143,13 +143,13 @@ static void mm_insw(unsigned long addr,
*bp = bswap(*(volatile u16 *)addr);
}

-static void h8300_input_data(ide_drive_t *drive, struct request *rq,
+static void h8300_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
mm_insw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
}

-static void h8300_output_data(ide_drive_t *drive, struct request *rq,
+static void h8300_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
mm_outsw(drive->hwif->io_ports.data_addr, buf, (len + 1) / 2);
Index: b/drivers/ide/ide-io-std.c
===================================================================
--- a/drivers/ide/ide-io-std.c
+++ b/drivers/ide/ide-io-std.c
@@ -219,7 +219,7 @@ static void ata_vlb_sync(unsigned long p
* so if an odd len is specified, be sure that there's at least one
* extra byte allocated for the buffer.
*/
-void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf,
+void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
unsigned int len)
{
ide_hwif_t *hwif = drive->hwif;
@@ -265,7 +265,7 @@ EXPORT_SYMBOL_GPL(ide_input_data);
/*
* This is used for most PIO data transfers *to* the IDE interface
*/
-void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
+void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
unsigned int len)
{
ide_hwif_t *hwif = drive->hwif;
Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -54,19 +54,20 @@ int taskfile_lib_get_identify (ide_drive
}

static ide_startstop_t task_no_data_intr(ide_drive_t *);
-static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
+static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
static ide_startstop_t task_in_intr(ide_drive_t *);

-ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
+ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
{
ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
struct ide_taskfile *tf = &cmd->tf;
ide_handler_t *handler = NULL;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
const struct ide_dma_ops *dma_ops = hwif->dma_ops;

- if (cmd->data_phase == TASKFILE_MULTI_IN ||
- cmd->data_phase == TASKFILE_MULTI_OUT) {
+ if (orig_cmd->data_phase == TASKFILE_MULTI_IN ||
+ orig_cmd->data_phase == TASKFILE_MULTI_OUT) {
if (!drive->mult_count) {
printk(KERN_ERR "%s: multimode not set!\n",
drive->name);
@@ -74,10 +75,10 @@ ide_startstop_t do_rw_taskfile(ide_drive
}
}

- if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
- cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
+ if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
+ orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;

- memcpy(&hwif->cmd, cmd, sizeof(*cmd));
+ memcpy(cmd, orig_cmd, sizeof(*cmd));

if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
ide_tf_dump(drive->name, tf);
@@ -91,7 +92,7 @@ ide_startstop_t do_rw_taskfile(ide_drive
case TASKFILE_OUT:
tp_ops->exec_command(hwif, tf->command);
ndelay(400); /* FIXME */
- return pre_task_out_intr(drive, cmd->rq);
+ return pre_task_out_intr(drive, cmd);
case TASKFILE_MULTI_IN:
case TASKFILE_IN:
handler = task_in_intr;
@@ -199,7 +200,7 @@ static u8 wait_drive_not_busy(ide_drive_
return stat;
}

-static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
+static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
unsigned int write)
{
ide_hwif_t *hwif = drive->hwif;
@@ -240,9 +241,9 @@ static void ide_pio_sector(ide_drive_t *

/* do the actual data transfer */
if (write)
- hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
+ hwif->tp_ops->output_data(drive, cmd, buf, SECTOR_SIZE);
else
- hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
+ hwif->tp_ops->input_data(drive, cmd, buf, SECTOR_SIZE);

kunmap_atomic(buf, KM_BIO_SRC_IRQ);
#ifdef CONFIG_HIGHMEM
@@ -250,24 +251,23 @@ static void ide_pio_sector(ide_drive_t *
#endif
}

-static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
+static void ide_pio_multi(ide_drive_t *drive, struct ide_cmd *cmd,
unsigned int write)
{
unsigned int nsect;

nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
while (nsect--)
- ide_pio_sector(drive, rq, write);
+ ide_pio_sector(drive, cmd, write);
}

-static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
- unsigned int write)
+static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
+ unsigned int write)
{
- struct ide_cmd *cmd = &drive->hwif->cmd;
u8 saved_io_32bit = drive->io_32bit;

- if (blk_fs_request(rq))
- rq->errors = 0;
+ if (cmd->tf_flags & IDE_TFLAG_FS)
+ cmd->rq->errors = 0;

if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
drive->io_32bit = 0;
@@ -277,22 +277,21 @@ static void ide_pio_datablock(ide_drive_
switch (cmd->data_phase) {
case TASKFILE_MULTI_IN:
case TASKFILE_MULTI_OUT:
- ide_pio_multi(drive, rq, write);
+ ide_pio_multi(drive, cmd, write);
break;
default:
- ide_pio_sector(drive, rq, write);
+ ide_pio_sector(drive, cmd, write);
break;
}

drive->io_32bit = saved_io_32bit;
}

-static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
+static ide_startstop_t task_error(ide_drive_t *drive, struct ide_cmd *cmd,
const char *s, u8 stat)
{
- if (blk_fs_request(rq)) {
+ if (cmd->tf_flags & IDE_TFLAG_FS) {
ide_hwif_t *hwif = drive->hwif;
- struct ide_cmd *cmd = &hwif->cmd;
int sectors = hwif->nsect - hwif->nleft;

switch (cmd->data_phase) {
@@ -319,19 +318,17 @@ static ide_startstop_t task_error(ide_dr
return ide_error(drive, s, stat);
}

-void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
+void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
{
- if (blk_fs_request(rq) == 0) {
- struct ide_cmd *cmd = rq->special;
+ if ((cmd->tf_flags & IDE_TFLAG_FS) == 0) {
u8 err = ide_read_error(drive);

- if (cmd)
- ide_complete_cmd(drive, cmd, stat, err);
+ ide_complete_cmd(drive, cmd, stat, err);
ide_complete_rq(drive, err);
return;
}

- ide_end_request(drive, 1, rq->nr_sectors);
+ ide_end_request(drive, 1, cmd->rq->nr_sectors);
}

/*
@@ -340,11 +337,12 @@ void task_end_request(ide_drive_t *drive
* It might be a spurious irq (shared irq), but it might be a
* command that had no output.
*/
-static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
+static ide_startstop_t task_in_unexpected(ide_drive_t *drive,
+ struct ide_cmd *cmd, u8 stat)
{
/* Command all done? */
if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
- task_end_request(drive, rq, stat);
+ ide_finish_cmd(drive, cmd, stat);
return ide_stopped;
}

@@ -359,25 +357,25 @@ static ide_startstop_t task_in_unexpecte
static ide_startstop_t task_in_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->rq;
+ struct ide_cmd *cmd = &drive->hwif->cmd;
u8 stat = hwif->tp_ops->read_status(hwif);

/* Error? */
if (stat & ATA_ERR)
- return task_error(drive, rq, __func__, stat);
+ return task_error(drive, cmd, __func__, stat);

/* Didn't want any data? Odd. */
if ((stat & ATA_DRQ) == 0)
- return task_in_unexpected(drive, rq, stat);
+ return task_in_unexpected(drive, cmd, stat);

- ide_pio_datablock(drive, rq, 0);
+ ide_pio_datablock(drive, cmd, 0);

/* Are we done? Check status and finish transfer. */
if (!hwif->nleft) {
stat = wait_drive_not_busy(drive);
if (!OK_STAT(stat, 0, BAD_STAT))
- return task_error(drive, rq, __func__, stat);
- task_end_request(drive, rq, stat);
+ return task_error(drive, cmd, __func__, stat);
+ ide_finish_cmd(drive, cmd, stat);
return ide_stopped;
}

@@ -393,31 +391,31 @@ static ide_startstop_t task_in_intr(ide_
static ide_startstop_t task_out_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->rq;
+ struct ide_cmd *cmd = &drive->hwif->cmd;
u8 stat = hwif->tp_ops->read_status(hwif);

if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
- return task_error(drive, rq, __func__, stat);
+ return task_error(drive, cmd, __func__, stat);

/* Deal with unexpected ATA data phase. */
if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
- return task_error(drive, rq, __func__, stat);
+ return task_error(drive, cmd, __func__, stat);

if (!hwif->nleft) {
- task_end_request(drive, rq, stat);
+ ide_finish_cmd(drive, cmd, stat);
return ide_stopped;
}

/* Still data left to transfer. */
- ide_pio_datablock(drive, rq, 1);
+ ide_pio_datablock(drive, cmd, 1);
ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);

return ide_started;
}

-static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
+static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
+ struct ide_cmd *cmd)
{
- struct ide_cmd *cmd = &drive->hwif->cmd;
ide_startstop_t startstop;

if (ide_wait_stat(&startstop, drive, ATA_DRQ,
@@ -433,7 +431,7 @@ static ide_startstop_t pre_task_out_intr
local_irq_disable();

ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
- ide_pio_datablock(drive, rq, 1);
+ ide_pio_datablock(drive, cmd, 1);

return ide_started;
}
Index: b/drivers/ide/q40ide.c
===================================================================
--- a/drivers/ide/q40ide.c
+++ b/drivers/ide/q40ide.c
@@ -72,23 +72,23 @@ static void q40_ide_setup_ports(hw_regs_
hw->chipset = ide_generic;
}

-static void q40ide_input_data(ide_drive_t *drive, struct request *rq,
+static void q40ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;

- if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+ if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS))
return insw(data_addr, buf, (len + 1) / 2);

raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
}

-static void q40ide_output_data(ide_drive_t *drive, struct request *rq,
+static void q40ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;

- if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
+ if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS))
return outsw(data_addr, buf, (len + 1) / 2);

raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
Index: b/drivers/ide/scc_pata.c
===================================================================
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -750,7 +750,7 @@ static void scc_tf_read(ide_drive_t *dri
}
}

-static void scc_input_data(ide_drive_t *drive, struct request *rq,
+static void scc_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;
@@ -766,7 +766,7 @@ static void scc_input_data(ide_drive_t *
scc_ide_insw(data_addr, buf, len / 2);
}

-static void scc_output_data(ide_drive_t *drive, struct request *rq,
+static void scc_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long data_addr = drive->hwif->io_ports.data_addr;
Index: b/drivers/ide/tx4938ide.c
===================================================================
--- a/drivers/ide/tx4938ide.c
+++ b/drivers/ide/tx4938ide.c
@@ -174,7 +174,7 @@ static void tx4938ide_tf_read(ide_drive_
}
}

-static void tx4938ide_input_data_swap(ide_drive_t *drive, struct request *rq,
+static void tx4938ide_input_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long port = drive->hwif->io_ports.data_addr;
@@ -186,7 +186,7 @@ static void tx4938ide_input_data_swap(id
__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
}

-static void tx4938ide_output_data_swap(ide_drive_t *drive, struct request *rq,
+static void tx4938ide_output_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
void *buf, unsigned int len)
{
unsigned long port = drive->hwif->io_ports.data_addr;
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -297,6 +297,7 @@ enum {
IDE_TFLAG_IO_16BIT = (1 << 26),
/* struct ide_cmd was allocated using kmalloc() */
IDE_TFLAG_DYN = (1 << 27),
+ IDE_TFLAG_FS = (1 << 28),
};

enum {
@@ -655,10 +656,10 @@ struct ide_tp_ops {
void (*tf_load)(ide_drive_t *, struct ide_cmd *);
void (*tf_read)(ide_drive_t *, struct ide_cmd *);

- void (*input_data)(ide_drive_t *, struct request *, void *,
- unsigned int);
- void (*output_data)(ide_drive_t *, struct request *, void *,
- unsigned int);
+ void (*input_data)(ide_drive_t *, struct ide_cmd *,
+ void *, unsigned int);
+ void (*output_data)(ide_drive_t *, struct ide_cmd *,
+ void *, unsigned int);
};

extern const struct ide_tp_ops default_tp_ops;
@@ -863,7 +864,7 @@ typedef ide_startstop_t (ide_handler_t)(
typedef int (ide_expiry_t)(ide_drive_t *);

/* used by ide-cd, ide-floppy, etc. */
-typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
+typedef void (xfer_func_t)(ide_drive_t *, struct ide_cmd *, void *, unsigned);

extern struct mutex ide_setting_mtx;

@@ -1172,8 +1173,8 @@ void ide_set_irq(ide_hwif_t *, int);
void ide_tf_load(ide_drive_t *, struct ide_cmd *);
void ide_tf_read(ide_drive_t *, struct ide_cmd *);

-void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
-void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
+void ide_input_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
+void ide_output_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);

int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);

@@ -1223,7 +1224,7 @@ ide_startstop_t ide_issue_pc(ide_drive_t

ide_startstop_t do_rw_taskfile(ide_drive_t *, struct ide_cmd *);

-void task_end_request(ide_drive_t *, struct request *, u8);
+void ide_finish_cmd(ide_drive_t *, struct ide_cmd *, u8);

int ide_raw_taskfile(ide_drive_t *, struct ide_cmd *, u8 *, u16);
int ide_no_data_taskfile(ide_drive_t *, struct ide_cmd *);
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