[PATCH 4/5] ide: add ide_read_[alt]status() inline helpers

From: Bartlomiej Zolnierkiewicz
Date: Fri Feb 01 2008 - 19:38:15 EST


Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/arm/icside.c | 2 -
drivers/ide/ide-cd.c | 7 +++---
drivers/ide/ide-dma.c | 3 +-
drivers/ide/ide-floppy.c | 4 +--
drivers/ide/ide-io.c | 12 +++++------
drivers/ide/ide-iops.c | 39 +++++++++++++++++++++++--------------
drivers/ide/ide-probe.c | 47 +++++++++++++++++++++++----------------------
drivers/ide/ide-tape.c | 7 +++---
drivers/ide/ide-taskfile.c | 30 ++++++++++++++--------------
drivers/scsi/ide-scsi.c | 4 +--
include/linux/ide.h | 14 +++++++++++++
11 files changed, 100 insertions(+), 69 deletions(-)

Index: b/drivers/ide/arm/icside.c
===================================================================
--- a/drivers/ide/arm/icside.c
+++ b/drivers/ide/arm/icside.c
@@ -365,7 +365,7 @@ static void icside_dma_timeout(ide_drive
if (icside_dma_test_irq(drive))
return;

- ide_dump_status(drive, "DMA timeout", HWIF(drive)->INB(IDE_STATUS_REG));
+ ide_dump_status(drive, "DMA timeout", ide_read_status(drive));

icside_dma_end(drive);
}
Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -295,7 +295,8 @@ static int cdrom_decode_status(ide_drive
int stat, err, sense_key;

/* Check for errors. */
- stat = HWIF(drive)->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);
+
if (stat_ret)
*stat_ret = stat;

@@ -692,7 +693,7 @@ int ide_cd_check_ireason(ide_drive_t *dr
/* Some drives (ASUS) seem to tell us that status
* info is available. just get it and ignore.
*/
- (void) HWIF(drive)->INB(IDE_STATUS_REG);
+ (void)ide_read_status(drive);
return 0;
} else {
/* Drive wants a command packet, or invalid ireason... */
@@ -1326,7 +1327,7 @@ ide_do_rw_cdrom (ide_drive_t *drive, str
if (blk_fs_request(rq)) {
if (info->cd_flags & IDE_CD_FLAG_SEEKING) {
unsigned long elapsed = jiffies - info->start_seek;
- int stat = HWIF(drive)->INB(IDE_STATUS_REG);
+ int stat = ide_read_status(drive);

if ((stat & SEEK_STAT) != SEEK_STAT) {
if (elapsed < IDECD_SEEK_TIMEOUT) {
Index: b/drivers/ide/ide-dma.c
===================================================================
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -147,7 +147,8 @@ ide_startstop_t ide_dma_intr (ide_drive_
u8 stat = 0, dma_stat = 0;

dma_stat = HWIF(drive)->ide_dma_end(drive);
- stat = HWIF(drive)->INB(IDE_STATUS_REG); /* get drive status */
+ stat = ide_read_status(drive);
+
if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
if (!dma_stat) {
struct request *rq = HWGROUP(drive)->rq;
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -503,7 +503,7 @@ static ide_startstop_t idefloppy_pc_intr
}

/* Clear the interrupt */
- stat = drive->hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

/* No more interrupts */
if ((stat & DRQ_STAT) == 0) {
@@ -1247,7 +1247,7 @@ static int idefloppy_get_format_progress
u8 stat;

local_irq_save(flags);
- stat = drive->hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);
local_irq_restore(flags);

progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -466,7 +466,7 @@ static ide_startstop_t ide_ata_error(ide
return ide_stopped;
}

- if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
+ if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
rq->errors |= ERROR_RESET;

if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
@@ -493,7 +493,7 @@ static ide_startstop_t ide_atapi_error(i
/* add decoding error stuff */
}

- if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
+ if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
/* force an abort */
hwif->OUTB(WIN_IDLEIMMEDIATE, IDE_COMMAND_REG);

@@ -821,8 +821,7 @@ static ide_startstop_t execute_drive_cmd
#ifdef DEBUG
printk("%s: DRIVE_CMD (null)\n", drive->name);
#endif
- ide_end_drive_cmd(drive,
- hwif->INB(IDE_STATUS_REG),
+ ide_end_drive_cmd(drive, ide_read_status(drive),
hwif->INB(IDE_ERROR_REG));
return ide_stopped;
}
@@ -1231,7 +1230,7 @@ static ide_startstop_t ide_dma_timeout_r
printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
(void)HWIF(drive)->ide_dma_end(drive);
ret = ide_error(drive, "dma timeout error",
- hwif->INB(IDE_STATUS_REG));
+ ide_read_status(drive));
} else {
printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name);
hwif->dma_timeout(drive);
@@ -1355,7 +1354,8 @@ void ide_timer_expiry (unsigned long dat
startstop = ide_dma_timeout_retry(drive, wait);
} else
startstop =
- ide_error(drive, "irq timeout", hwif->INB(IDE_STATUS_REG));
+ ide_error(drive, "irq timeout",
+ ide_read_status(drive));
}
drive->service_time = jiffies - drive->service_start;
spin_lock_irq(&ide_lock);
Index: b/drivers/ide/ide-iops.c
===================================================================
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -430,10 +430,10 @@ int drive_is_ready (ide_drive_t *drive)
* about possible isa-pnp and pci-pnp issues yet.
*/
if (IDE_CONTROL_REG)
- stat = hwif->INB(IDE_ALTSTATUS_REG);
+ stat = ide_read_altstatus(drive);
else
/* Note: this may clear a pending IRQ!! */
- stat = hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

if (stat & BUSY_STAT)
/* drive busy: definitely not interrupting */
@@ -458,23 +458,24 @@ EXPORT_SYMBOL(drive_is_ready);
*/
static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
{
- ide_hwif_t *hwif = drive->hwif;
unsigned long flags;
int i;
u8 stat;

udelay(1); /* spec allows drive 400ns to assert "BUSY" */
- if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+ stat = ide_read_status(drive);
+
+ if (stat & BUSY_STAT) {
local_irq_set(flags);
timeout += jiffies;
- while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) {
+ while ((stat = ide_read_status(drive)) & BUSY_STAT) {
if (time_after(jiffies, timeout)) {
/*
* One last read after the timeout in case
* heavy interrupt load made us not make any
* progress during the timeout..
*/
- stat = hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);
if (!(stat & BUSY_STAT))
break;

@@ -494,7 +495,9 @@ static int __ide_wait_stat(ide_drive_t *
*/
for (i = 0; i < 10; i++) {
udelay(1);
- if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) {
+ stat = ide_read_status(drive);
+
+ if (OK_STAT(stat, good, bad)) {
*rstat = stat;
return 0;
}
@@ -617,6 +620,7 @@ int ide_driveid_update(ide_drive_t *driv
ide_hwif_t *hwif = drive->hwif;
struct hd_driveid *id;
unsigned long timeout, flags;
+ u8 stat;

/*
* Re-read drive->id for possible DMA mode
@@ -633,10 +637,15 @@ int ide_driveid_update(ide_drive_t *driv
SELECT_MASK(drive, 0);
return 0; /* drive timed-out */
}
+
msleep(50); /* give drive a breather */
- } while (hwif->INB(IDE_ALTSTATUS_REG) & BUSY_STAT);
+ stat = ide_read_altstatus(drive);
+ } while (stat & BUSY_STAT);
+
msleep(50); /* wait for IRQ and DRQ_STAT */
- if (!OK_STAT(hwif->INB(IDE_STATUS_REG),DRQ_STAT,BAD_R_STAT)) {
+ stat = ide_read_status(drive);
+
+ if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
SELECT_MASK(drive, 0);
printk("%s: CHECK for good STATUS\n", drive->name);
return 0;
@@ -649,7 +658,7 @@ int ide_driveid_update(ide_drive_t *driv
return 0;
}
ata_input_data(drive, id, SECTOR_WORDS);
- (void) hwif->INB(IDE_STATUS_REG); /* clear drive IRQ */
+ (void)ide_read_status(drive); /* clear drive IRQ */
local_irq_enable();
local_irq_restore(flags);
ide_fix_driveid(id);
@@ -850,15 +859,15 @@ static ide_startstop_t do_reset1 (ide_dr
static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
- ide_hwif_t *hwif = HWIF(drive);
u8 stat;

SELECT_DRIVE(drive);
udelay (10);
+ stat = ide_read_status(drive);

- if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
+ if (OK_STAT(stat, 0, BUSY_STAT))
printk("%s: ATAPI reset complete\n", drive->name);
- } else {
+ else {
if (time_before(jiffies, hwgroup->poll_timeout)) {
ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
/* continue polling */
@@ -897,7 +906,9 @@ static ide_startstop_t reset_pollfunc (i
}
}

- if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) {
+ tmp = ide_read_status(drive);
+
+ if (!OK_STAT(tmp, 0, BUSY_STAT)) {
if (time_before(jiffies, hwgroup->poll_timeout)) {
ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
/* continue polling */
Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -264,8 +264,7 @@ err_misc:
static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
{
ide_hwif_t *hwif = HWIF(drive);
- int rc;
- unsigned long hd_status;
+ int use_altstatus = 0, rc;
unsigned long timeout;
u8 s = 0, a = 0;

@@ -273,19 +272,17 @@ static int actual_try_to_identify (ide_d
msleep(50);

if (IDE_CONTROL_REG) {
- a = hwif->INB(IDE_ALTSTATUS_REG);
- s = hwif->INB(IDE_STATUS_REG);
- if ((a ^ s) & ~INDEX_STAT) {
- printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of "
- "ALTSTATUS(0x%02x)\n", drive->name, s, a);
+ a = ide_read_altstatus(drive);
+ s = ide_read_status(drive);
+ if ((a ^ s) & ~INDEX_STAT)
/* ancient Seagate drives, broken interfaces */
- hd_status = IDE_STATUS_REG;
- } else {
+ printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
+ "instead of ALTSTATUS(0x%02x)\n",
+ drive->name, s, a);
+ else
/* use non-intrusive polling */
- hd_status = IDE_ALTSTATUS_REG;
- }
- } else
- hd_status = IDE_STATUS_REG;
+ use_altstatus = 1;
+ }

/* set features register for atapi
* identify command to be sure of reply
@@ -306,11 +303,15 @@ static int actual_try_to_identify (ide_d
}
/* give drive a breather */
msleep(50);
- } while ((hwif->INB(hd_status)) & BUSY_STAT);
+ s = use_altstatus ? ide_read_altstatus(drive)
+ : ide_read_status(drive);
+ } while (s & BUSY_STAT);

/* wait for IRQ and DRQ_STAT */
msleep(50);
- if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) {
+ s = ide_read_status(drive);
+
+ if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
unsigned long flags;

/* local CPU only; some systems need this */
@@ -320,7 +321,7 @@ static int actual_try_to_identify (ide_d
/* drive responded with ID */
rc = 0;
/* clear drive IRQ */
- (void) hwif->INB(IDE_STATUS_REG);
+ (void)ide_read_status(drive);
local_irq_restore(flags);
} else {
/* drive refused ID */
@@ -367,7 +368,7 @@ static int try_to_identify (ide_drive_t

ide_set_irq(drive, 0);
/* clear drive IRQ */
- (void) hwif->INB(IDE_STATUS_REG);
+ (void)ide_read_status(drive);
udelay(5);
irq = probe_irq_off(cookie);
if (!hwif->irq) {
@@ -455,7 +456,9 @@ static int do_probe (ide_drive_t *drive,
return 3;
}

- if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) ||
+ stat = ide_read_status(drive);
+
+ if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
drive->present || cmd == WIN_PIDENTIFY) {
/* send cmd and wait */
if ((rc = try_to_identify(drive, cmd))) {
@@ -463,7 +466,7 @@ static int do_probe (ide_drive_t *drive,
rc = try_to_identify(drive,cmd);
}

- stat = hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

if (stat == (BUSY_STAT | READY_STAT))
return 4;
@@ -482,7 +485,7 @@ static int do_probe (ide_drive_t *drive,
}

/* ensure drive IRQ is clear */
- stat = hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

if (rc == 1)
printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
@@ -496,7 +499,7 @@ static int do_probe (ide_drive_t *drive,
SELECT_DRIVE(&hwif->drives[0]);
msleep(50);
/* ensure drive irq is clear */
- (void) hwif->INB(IDE_STATUS_REG);
+ (void)ide_read_status(drive);
}
return rc;
}
@@ -521,7 +524,7 @@ static void enable_nest (ide_drive_t *dr

msleep(50);

- stat = hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

if (!OK_STAT(stat, 0, BAD_STAT))
printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1178,7 +1178,7 @@ static ide_startstop_t idetape_pc_intr (
#endif /* IDETAPE_DEBUG_LOG */

/* Clear the interrupt */
- stat = hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
if (hwif->ide_dma_end(drive) || (stat & ERR_STAT)) {
@@ -1598,7 +1598,8 @@ static ide_startstop_t idetape_media_acc
idetape_pc_t *pc = tape->pc;
u8 stat;

- stat = drive->hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);
+
if (stat & SEEK_STAT) {
if (stat & ERR_STAT) {
/* Error detected */
@@ -1758,7 +1759,7 @@ static ide_startstop_t idetape_do_reques
* If the tape is still busy, postpone our request and service
* the other device meanwhile.
*/
- stat = drive->hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

if (!drive->dsc_overlap && !(rq->cmd[0] & REQ_IDETAPE_PC2))
set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -189,12 +189,11 @@ EXPORT_SYMBOL_GPL(do_rw_taskfile);
*/
static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- u8 stat;
+ u8 stat = ide_read_status(drive);

- if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
+ if (OK_STAT(stat, READY_STAT, BAD_STAT))
drive->mult_count = drive->mult_req;
- } else {
+ else {
drive->mult_req = drive->mult_count = 0;
drive->special.b.recalibrate = 1;
(void) ide_dump_status(drive, "set_multmode", stat);
@@ -207,11 +206,10 @@ static ide_startstop_t set_multmode_intr
*/
static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
int retries = 5;
u8 stat;

- while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
+ while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
udelay(10);

if (OK_STAT(stat, READY_STAT, BAD_STAT))
@@ -230,10 +228,9 @@ static ide_startstop_t set_geometry_intr
*/
static ide_startstop_t recal_intr(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- u8 stat;
+ u8 stat = ide_read_status(drive);

- if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
+ if (!OK_STAT(stat, READY_STAT, BAD_STAT))
return ide_error(drive, "recal_intr", stat);
return ide_stopped;
}
@@ -248,10 +245,12 @@ static ide_startstop_t task_no_data_intr
u8 stat;

local_irq_enable_in_hardirq();
- if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
+ stat = ide_read_status(drive);
+
+ if (!OK_STAT(stat, READY_STAT, BAD_STAT))
return ide_error(drive, "task_no_data_intr", stat);
/* calls ide_end_drive_cmd */
- }
+
if (args)
ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));

@@ -260,7 +259,6 @@ static ide_startstop_t task_no_data_intr

u8 wait_drive_not_busy(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
int retries;
u8 stat;

@@ -269,7 +267,9 @@ u8 wait_drive_not_busy(ide_drive_t *driv
* This can take up to 10 usec, but we will wait max 1 ms.
*/
for (retries = 0; retries < 100; retries++) {
- if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
+ stat = ide_read_status(drive);
+
+ if (stat & BUSY_STAT)
udelay(10);
else
break;
@@ -430,7 +430,7 @@ static ide_startstop_t task_in_intr(ide_
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = HWGROUP(drive)->rq;
- u8 stat = hwif->INB(IDE_STATUS_REG);
+ u8 stat = ide_read_status(drive);

/* new way for dealing with premature shared PCI interrupts */
if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
@@ -465,7 +465,7 @@ static ide_startstop_t task_out_intr (id
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = HWGROUP(drive)->rq;
- u8 stat = hwif->INB(IDE_STATUS_REG);
+ u8 stat = ide_read_status(drive);

if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
return task_error(drive, rq, __FUNCTION__, stat);
Index: b/drivers/scsi/ide-scsi.c
===================================================================
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -287,7 +287,7 @@ static int idescsi_end_request(ide_drive
static ide_startstop_t
idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
{
- if (HWIF(drive)->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
+ if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
/* force an abort */
HWIF(drive)->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG);

@@ -423,7 +423,7 @@ static ide_startstop_t idescsi_pc_intr (
}

/* Clear the interrupt */
- stat = drive->hwif->INB(IDE_STATUS_REG);
+ stat = ide_read_status(drive);

if ((stat & DRQ_STAT) == 0) {
/* No more interrupts */
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1311,4 +1311,18 @@ static inline void ide_set_irq(ide_drive
drive->hwif->OUTB(drive->ctl | (on ? 0 : 2), IDE_CONTROL_REG);
}

+static inline u8 ide_read_status(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+
+ return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+}
+
+static inline u8 ide_read_altstatus(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+
+ return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
+}
+
#endif /* _IDE_H */
--
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