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Commit 4949833a authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Anton Blanchard
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[PATCH] switch ide to taskfile IO 

- rewrite taskfile PIO handlers
  (they now comply with ide state machine and use bio walking)
- switch ide-disk.c to use *only* taskfile IO
- swicth pdc4030.c to use *only* taskfile IO (untested)
- remove old cruft (>600 lines)
parent 319a0865
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Showing with 290 additions and 927 deletions
drivers/ide/Kconfig
View file @ 4949833a
......@@ -219,7 +219,6 @@ config IDE_TASK_IOCTL
If you are unsure, say N here.
#bool ' IDE Taskfile IO' CONFIG_IDE_TASKFILE_IO
comment "IDE chipset support/bugfixes"
depends on BLK_DEV_IDE
......@@ -1071,11 +1070,6 @@ config BLK_DEV_PDC202XX
If unsure, say N.
##if [ "$CONFIG_IDE_TASKFILE_IO" = "y" ]; then
## dep_mbool CONFIG_BLK_DEV_TF_DISK $CONFIG_BLK_DEV_IDEDISK
##else
## dep_mbool CONFIG_BLK_DEV_NTF_DISK $CONFIG_BLK_DEV_IDEDISK
##fi
config BLK_DEV_IDE_MODES
bool
depends on BLK_DEV_4DRIVES || BLK_DEV_ALI14XX || BLK_DEV_DTC2278 || BLK_DEV_HT6560B || BLK_DEV_PDC4030 || BLK_DEV_QD65XX || BLK_DEV_UMC8672 || BLK_DEV_AEC62XX=y || BLK_DEV_ALI15X3=y || BLK_DEV_AMD74XX=y || BLK_DEV_CMD640 || BLK_DEV_CMD64X=y || BLK_DEV_CS5530=y || BLK_DEV_CY82C693=y || BLK_DEV_HPT34X=y || BLK_DEV_HPT366=y || BLK_DEV_IDE_PMAC || BLK_DEV_IT8172 || BLK_DEV_MPC8xx_IDE || BLK_DEV_NFORCE=y || BLK_DEV_OPTI621=y || BLK_DEV_PDC202XX || BLK_DEV_PIIX=y || BLK_DEV_SVWKS=y || BLK_DEV_SIIMAGE=y || BLK_DEV_SIS5513=y || BLK_DEV_SL82C105=y || BLK_DEV_SLC90E66=y || BLK_DEV_VIA82CXXX=y
......
drivers/ide/ide-disk.c
View file @ 4949833a
......@@ -136,423 +136,6 @@ static int idedisk_start_tag(ide_drive_t *drive, struct request *rq)
return ret;
}
#ifndef CONFIG_IDE_TASKFILE_IO
static int driver_blocked;
/*
* read_intr() is the handler for disk read/multread interrupts
*/
static ide_startstop_t read_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u32 i = 0, nsect = 0, msect = drive->mult_count;
struct request *rq;
unsigned long flags;
u8 stat;
char *to;
/* new way for dealing with premature shared PCI interrupts */
if (!OK_STAT(stat=hwif->INB(IDE_STATUS_REG),DATA_READY,BAD_R_STAT)) {
if (stat & (ERR_STAT|DRQ_STAT)) {
return DRIVER(drive)->error(drive, "read_intr", stat);
}
/* no data yet, so wait for another interrupt */
ide_set_handler(drive, &read_intr, WAIT_CMD, NULL);
return ide_started;
}
read_next:
rq = HWGROUP(drive)->rq;
if (msect) {
if ((nsect = rq->current_nr_sectors) > msect)
nsect = msect;
msect -= nsect;
} else
nsect = 1;
to = ide_map_buffer(rq, &flags);
taskfile_input_data(drive, to, nsect * SECTOR_WORDS);
#ifdef DEBUG
printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
drive->name, rq->sector, rq->sector+nsect-1,
(unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
#endif
ide_unmap_buffer(rq, to, &flags);
rq->sector += nsect;
rq->errors = 0;
i = (rq->nr_sectors -= nsect);
if (((long)(rq->current_nr_sectors -= nsect)) <= 0)
ide_end_request(drive, 1, rq->hard_cur_sectors);
/*
* Another BH Page walker and DATA INTEGRITY Questioned on ERROR.
* If passed back up on multimode read, BAD DATA could be ACKED
* to FILE SYSTEMS above ...
*/
if (i > 0) {
if (msect)
goto read_next;
ide_set_handler(drive, &read_intr, WAIT_CMD, NULL);
return ide_started;
}
return ide_stopped;
}
/*
* write_intr() is the handler for disk write interrupts
*/
static ide_startstop_t write_intr (ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
ide_hwif_t *hwif = HWIF(drive);
struct request *rq = hwgroup->rq;
u32 i = 0;
u8 stat;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),
DRIVE_READY, drive->bad_wstat)) {
printk("%s: write_intr error1: nr_sectors=%ld, stat=0x%02x\n",
drive->name, rq->nr_sectors, stat);
} else {
#ifdef DEBUG
printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n",
drive->name, rq->sector, (unsigned long) rq->buffer,
rq->nr_sectors-1);
#endif
if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) {
rq->sector++;
rq->errors = 0;
i = --rq->nr_sectors;
--rq->current_nr_sectors;
if (((long)rq->current_nr_sectors) <= 0)
ide_end_request(drive, 1, rq->hard_cur_sectors);
if (i > 0) {
unsigned long flags;
char *to = ide_map_buffer(rq, &flags);
taskfile_output_data(drive, to, SECTOR_WORDS);
ide_unmap_buffer(rq, to, &flags);
ide_set_handler(drive, &write_intr, WAIT_CMD, NULL);
return ide_started;
}
return ide_stopped;
}
/* the original code did this here (?) */
return ide_stopped;
}
return DRIVER(drive)->error(drive, "write_intr", stat);
}
/*
* ide_multwrite() transfers a block of up to mcount sectors of data
* to a drive as part of a disk multiple-sector write operation.
*
* Returns 0 on success.
*
* Note that we may be called from two contexts - __ide_do_rw_disk() context
* and IRQ context. The IRQ can happen any time after we've output the
* full "mcount" number of sectors, so we must make sure we update the
* state _before_ we output the final part of the data!
*
* The update and return to BH is a BLOCK Layer Fakey to get more data
* to satisfy the hardware atomic segment. If the hardware atomic segment
* is shorter or smaller than the BH segment then we should be OKAY.
* This is only valid if we can rewind the rq->current_nr_sectors counter.
*/
int ide_multwrite (ide_drive_t *drive, unsigned int mcount)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
struct request *rq = &hwgroup->wrq;
do {
char *buffer;
int nsect = rq->current_nr_sectors;
unsigned long flags;
if (nsect > mcount)
nsect = mcount;
mcount -= nsect;
buffer = ide_map_buffer(rq, &flags);
rq->sector += nsect;
rq->nr_sectors -= nsect;
rq->current_nr_sectors -= nsect;
/* Do we move to the next bh after this? */
if (!rq->current_nr_sectors) {
struct bio *bio = rq->bio;
/*
* only move to next bio, when we have processed
* all bvecs in this one.
*/
if (++bio->bi_idx >= bio->bi_vcnt) {
bio->bi_idx = 0;
bio = bio->bi_next;
}
/* end early early we ran out of requests */
if (!bio) {
mcount = 0;
} else {
rq->bio = bio;
rq->current_nr_sectors = bio_iovec(bio)->bv_len >> 9;
rq->hard_cur_sectors = rq->current_nr_sectors;
}
}
/*
* Ok, we're all setup for the interrupt
* re-entering us on the last transfer.
*/
taskfile_output_data(drive, buffer, nsect<<7);
ide_unmap_buffer(rq, buffer, &flags);
} while (mcount);
return 0;
}
/*
* multwrite_intr() is the handler for disk multwrite interrupts
*/
static ide_startstop_t multwrite_intr (ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
ide_hwif_t *hwif = HWIF(drive);
struct request *rq = &hwgroup->wrq;
u8 stat;
stat = hwif->INB(IDE_STATUS_REG);
if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) {
if (stat & DRQ_STAT) {
/*
* The drive wants data. Remember rq is the copy
* of the request
*/
if (rq->nr_sectors) {
if (ide_multwrite(drive, drive->mult_count))
return ide_stopped;
ide_set_handler(drive, &multwrite_intr, WAIT_CMD, NULL);
return ide_started;
}
} else {
/*
* If the copy has all the blocks completed then
* we can end the original request.
*/
if (!rq->nr_sectors) { /* all done? */
rq = hwgroup->rq;
ide_end_request(drive, 1, rq->nr_sectors);
return ide_stopped;
}
}
/* the original code did this here (?) */
return ide_stopped;
}
return DRIVER(drive)->error(drive, "multwrite_intr", stat);
}
/*
* __ide_do_rw_disk() issues READ and WRITE commands to a disk,
* using LBA if supported, or CHS otherwise, to address sectors.
* It also takes care of issuing special DRIVE_CMDs.
*/
ide_startstop_t __ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
ide_hwif_t *hwif = HWIF(drive);
u8 lba48 = (drive->addressing == 1) ? 1 : 0;
task_ioreg_t command = WIN_NOP;
ata_nsector_t nsectors;
nsectors.all = (u16) rq->nr_sectors;
if (driver_blocked)
panic("Request while ide driver is blocked?");
if (drive->using_tcq && idedisk_start_tag(drive, rq)) {
if (!ata_pending_commands(drive))
BUG();
return ide_started;
}
if (IDE_CONTROL_REG)
hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
if (drive->select.b.lba) {
if (drive->addressing == 1) {
task_ioreg_t tasklets[10];
if (blk_rq_tagged(rq)) {
tasklets[0] = nsectors.b.low;
tasklets[1] = nsectors.b.high;
tasklets[2] = rq->tag << 3;
tasklets[3] = 0;
} else {
tasklets[0] = 0;
tasklets[1] = 0;
tasklets[2] = nsectors.b.low;
tasklets[3] = nsectors.b.high;
}
tasklets[4] = (task_ioreg_t) block;
tasklets[5] = (task_ioreg_t) (block>>8);
tasklets[6] = (task_ioreg_t) (block>>16);
tasklets[7] = (task_ioreg_t) (block>>24);
if (sizeof(block) == 4) {
tasklets[8] = (task_ioreg_t) 0;
tasklets[9] = (task_ioreg_t) 0;
} else {
tasklets[8] = (task_ioreg_t)((u64)block >> 32);
tasklets[9] = (task_ioreg_t)((u64)block >> 40);
}
#ifdef DEBUG
printk("%s: %sing: LBAsect=%lu, sectors=%ld, "
"buffer=0x%08lx, LBAsect=0x%012lx\n",
drive->name,
rq_data_dir(rq)==READ?"read":"writ",
block,
rq->nr_sectors,
(unsigned long) rq->buffer,
block);
printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n",
drive->name, tasklets[3], tasklets[2],
tasklets[9], tasklets[8], tasklets[7],
tasklets[6], tasklets[5], tasklets[4]);
#endif
hwif->OUTB(tasklets[1], IDE_FEATURE_REG);
hwif->OUTB(tasklets[3], IDE_NSECTOR_REG);
hwif->OUTB(tasklets[7], IDE_SECTOR_REG);
hwif->OUTB(tasklets[8], IDE_LCYL_REG);
hwif->OUTB(tasklets[9], IDE_HCYL_REG);
hwif->OUTB(tasklets[0], IDE_FEATURE_REG);
hwif->OUTB(tasklets[2], IDE_NSECTOR_REG);
hwif->OUTB(tasklets[4], IDE_SECTOR_REG);
hwif->OUTB(tasklets[5], IDE_LCYL_REG);
hwif->OUTB(tasklets[6], IDE_HCYL_REG);
hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG);
} else {
#ifdef DEBUG
printk("%s: %sing: LBAsect=%llu, sectors=%ld, "
"buffer=0x%08lx\n",
drive->name,
rq_data_dir(rq)==READ?"read":"writ",
(unsigned long long)block, rq->nr_sectors,
(unsigned long) rq->buffer);
#endif
if (blk_rq_tagged(rq)) {
hwif->OUTB(nsectors.b.low, IDE_FEATURE_REG);
hwif->OUTB(rq->tag << 3, IDE_NSECTOR_REG);
} else {
hwif->OUTB(0x00, IDE_FEATURE_REG);
hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
}
hwif->OUTB(block, IDE_SECTOR_REG);
hwif->OUTB(block>>=8, IDE_LCYL_REG);
hwif->OUTB(block>>=8, IDE_HCYL_REG);
hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
}
} else {
unsigned int sect,head,cyl,track;
track = (int)block / drive->sect;
sect = (int)block % drive->sect + 1;
hwif->OUTB(sect, IDE_SECTOR_REG);
head = track % drive->head;
cyl = track / drive->head;
if (blk_rq_tagged(rq)) {
hwif->OUTB(nsectors.b.low, IDE_FEATURE_REG);
hwif->OUTB(rq->tag << 3, IDE_NSECTOR_REG);
} else {
hwif->OUTB(0x00, IDE_FEATURE_REG);
hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
}
hwif->OUTB(cyl, IDE_LCYL_REG);
hwif->OUTB(cyl>>8, IDE_HCYL_REG);
hwif->OUTB(head|drive->select.all,IDE_SELECT_REG);
#ifdef DEBUG
printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
drive->name, rq_data_dir(rq)==READ?"read":"writ", cyl,
head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
#endif
}
if (rq_data_dir(rq) == READ) {
if (blk_rq_tagged(rq))
return hwif->ide_dma_queued_read(drive);
if (drive->using_dma && !hwif->ide_dma_read(drive))
return ide_started;
command = ((drive->mult_count) ?
((lba48) ? WIN_MULTREAD_EXT : WIN_MULTREAD) :
((lba48) ? WIN_READ_EXT : WIN_READ));
ide_execute_command(drive, command, &read_intr, WAIT_CMD, NULL);
return ide_started;
} else if (rq_data_dir(rq) == WRITE) {
ide_startstop_t startstop;
if (blk_rq_tagged(rq))
return hwif->ide_dma_queued_write(drive);
if (drive->using_dma && !(HWIF(drive)->ide_dma_write(drive)))
return ide_started;
command = ((drive->mult_count) ?
((lba48) ? WIN_MULTWRITE_EXT : WIN_MULTWRITE) :
((lba48) ? WIN_WRITE_EXT : WIN_WRITE));
hwif->OUTB(command, IDE_COMMAND_REG);
if (ide_wait_stat(&startstop, drive, DATA_READY,
drive->bad_wstat, WAIT_DRQ)) {
printk(KERN_ERR "%s: no DRQ after issuing %s\n",
drive->name,
drive->mult_count ? "MULTWRITE" : "WRITE");
return startstop;
}
if (!drive->unmask)
local_irq_disable();
if (drive->mult_count) {
ide_hwgroup_t *hwgroup = HWGROUP(drive);
/*
* Ugh.. this part looks ugly because we MUST set up
* the interrupt handler before outputting the first block
* of data to be written. If we hit an error (corrupted buffer list)
* in ide_multwrite(), then we need to remove the handler/timer
* before returning. Fortunately, this NEVER happens (right?).
*
* Except when you get an error it seems...
*
* MAJOR DATA INTEGRITY BUG !!! only if we error
*/
hwgroup->wrq = *rq; /* scratchpad */
ide_set_handler(drive, &multwrite_intr, WAIT_CMD, NULL);
if (ide_multwrite(drive, drive->mult_count)) {
unsigned long flags;
spin_lock_irqsave(&ide_lock, flags);
hwgroup->handler = NULL;
del_timer(&hwgroup->timer);
spin_unlock_irqrestore(&ide_lock, flags);
return ide_stopped;
}
} else {
unsigned long flags;
char *to = ide_map_buffer(rq, &flags);
ide_set_handler(drive, &write_intr, WAIT_CMD, NULL);
taskfile_output_data(drive, to, SECTOR_WORDS);
ide_unmap_buffer(rq, to, &flags);
}
return ide_started;
}
blk_dump_rq_flags(rq, "__ide_do_rw_disk - bad command");
ide_end_request(drive, 0, 0);
return ide_stopped;
}
EXPORT_SYMBOL_GPL(__ide_do_rw_disk);
#else /* CONFIG_IDE_TASKFILE_IO */
static ide_startstop_t chs_rw_disk(ide_drive_t *, struct request *, unsigned long);
static ide_startstop_t lba_28_rw_disk(ide_drive_t *, struct request *, unsigned long);
static ide_startstop_t lba_48_rw_disk(ide_drive_t *, struct request *, unsigned long long);
......@@ -750,8 +333,6 @@ static ide_startstop_t lba_48_rw_disk (ide_drive_t *drive, struct request *rq, u
return do_rw_taskfile(drive, &args);
}
#endif /* CONFIG_IDE_TASKFILE_IO */
static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
ide_hwif_t *hwif = HWIF(drive);
......@@ -866,6 +447,9 @@ ide_startstop_t idedisk_error (ide_drive_t *drive, const char *msg, u8 stat)
return ide_stopped;
}
#endif
/* make rq completion pointers new submission pointers */
blk_rq_prep_restart(rq);
if (stat & BUSY_STAT || ((stat & WRERR_STAT) && !drive->nowerr)) {
/* other bits are useless when BUSY */
rq->errors |= ERROR_RESET;
......
drivers/ide/ide-taskfile.c
View file @ 4949833a
......@@ -5,6 +5,7 @@
* Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
* Copyright (C) 2001-2002 Klaus Smolin
* IBM Storage Technology Division
* Copyright (C) 2003 Bartlomiej Zolnierkiewicz
*
* The big the bad and the ugly.
*
......@@ -58,9 +59,6 @@
#define DTF(x...)
#endif
#define task_map_rq(rq, flags) ide_map_buffer((rq), (flags))
#define task_unmap_rq(rq, buf, flags) ide_unmap_buffer((rq), (buf), (flags))
static void ata_bswap_data (void *buffer, int wcount)
{
u16 *p = buffer;
......@@ -167,9 +165,12 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
if (task->handler != NULL) {
ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
if (task->prehandler != NULL)
if (task->prehandler != NULL) {
hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
ndelay(400); /* FIXME */
return task->prehandler(drive, task->rq);
}
ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
return ide_started;
}
......@@ -351,404 +352,271 @@ ide_startstop_t task_no_data_intr (ide_drive_t *drive)
EXPORT_SYMBOL(task_no_data_intr);
static u8 wait_drive_not_busy(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
int retries = 5;
u8 stat;
/*
* (ks) Last sector was transfered, wait until drive is ready.
* This can take up to 10 usec. We willl wait max 50 us.
*/
while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
udelay(10);
return stat;
}
/*
* Handler for command with PIO data-in phase, READ
*/
/*
* FIXME before 2.4 enable ...
* DATA integrity issue upon error. <andre@linux-ide.org>
* Handler for command with PIO data-in phase (Read).
*/
ide_startstop_t task_in_intr (ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
ide_hwif_t *hwif = HWIF(drive);
char *pBuf = NULL;
u8 stat;
unsigned long flags;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),DATA_READY,BAD_R_STAT)) {
if (stat & (ERR_STAT|DRQ_STAT)) {
#if 0
DTF("%s: attempting to recover last " \
"sector counter status=0x%02x\n",
drive->name, stat);
/*
* Expect a BUG BOMB if we attempt to rewind the
* offset in the BH aka PAGE in the current BLOCK
* segment. This is different than the HOST segment.
*/
#endif
if (!rq->bio)
rq->current_nr_sectors++;
return DRIVER(drive)->error(drive, "task_in_intr", stat);
}
if (!(stat & BUSY_STAT)) {
DTF("task_in_intr to Soon wait for next interrupt\n");
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
struct request *rq = HWGROUP(drive)->rq;
u8 stat, good_stat;
good_stat = DATA_READY;
stat = HWIF(drive)->INB(IDE_STATUS_REG);
check_status:
if (!OK_STAT(stat, good_stat, BAD_R_STAT)) {
if (stat & (ERR_STAT | DRQ_STAT))
return DRIVER(drive)->error(drive, __FUNCTION__, stat);
/* BUSY_STAT: No data yet, so wait for another IRQ. */
ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
#if 0
/*
* Holding point for a brain dump of a thought :-/
* Complete previously submitted bios (if any).
* Status was already verifyied.
*/
if (!OK_STAT(stat,DRIVE_READY,drive->bad_wstat)) {
DTF("%s: READ attempting to recover last " \
"sector counter status=0x%02x\n",
drive->name, stat);
rq->current_nr_sectors++;
return DRIVER(drive)->error(drive, "task_in_intr", stat);
}
if (!rq->current_nr_sectors)
if (!DRIVER(drive)->end_request(drive, 1, 0))
while (rq->bio != rq->cbio)
if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
return ide_stopped;
/* Complete rq->buffer based request (ioctls). */
if (!rq->bio && !rq->nr_sectors) {
ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
return ide_stopped;
}
if (--rq->current_nr_sectors <= 0)
if (!DRIVER(drive)->end_request(drive, 1, 0))
return ide_stopped;
#endif
rq->errors = 0;
task_sectors(drive, rq, 1, IDE_PIO_IN);
/* If it was the last datablock check status and finish transfer. */
if (!rq->nr_sectors) {
good_stat = 0;
stat = wait_drive_not_busy(drive);
goto check_status;
}
/* Still data left to transfer. */
ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
pBuf = task_map_rq(rq, &flags);
DTF("Read: %p, rq->current_nr_sectors: %d, stat: %02x\n",
pBuf, (int) rq->current_nr_sectors, stat);
taskfile_input_data(drive, pBuf, SECTOR_WORDS);
task_unmap_rq(rq, pBuf, &flags);
/*
* FIXME :: We really can not legally get a new page/bh
* regardless, if this is the end of our segment.
* BH walking or segment can only be updated after we have a good
* hwif->INB(IDE_STATUS_REG); return.
*/
if (--rq->current_nr_sectors <= 0)
if (!DRIVER(drive)->end_request(drive, 1, 0))
return ide_stopped;
/*
* ERM, it is techincally legal to leave/exit here but it makes
* a mess of the code ...
*/
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
EXPORT_SYMBOL(task_in_intr);
/*
* Handler for command with Read Multiple
* Handler for command with PIO data-in phase (Read Multiple).
*/
ide_startstop_t task_mulin_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
struct request *rq = HWGROUP(drive)->rq;
char *pBuf = NULL;
unsigned int msect = drive->mult_count;
struct request *rq = HWGROUP(drive)->rq;
unsigned int msect = drive->mult_count;
unsigned int nsect;
unsigned long flags;
u8 stat;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),DATA_READY,BAD_R_STAT)) {
if (stat & (ERR_STAT|DRQ_STAT)) {
if (!rq->bio) {
rq->current_nr_sectors += drive->mult_count;
/*
* NOTE: could rewind beyond beginning :-/
*/
} else {
printk(KERN_ERR "%s: MULTI-READ assume all data " \
"transfered is bad status=0x%02x\n",
drive->name, stat);
}
return DRIVER(drive)->error(drive, "task_mulin_intr", stat);
}
/* no data yet, so wait for another interrupt */
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
u8 stat, good_stat;
good_stat = DATA_READY;
stat = HWIF(drive)->INB(IDE_STATUS_REG);
check_status:
if (!OK_STAT(stat, good_stat, BAD_R_STAT)) {
if (stat & (ERR_STAT | DRQ_STAT))
return DRIVER(drive)->error(drive, __FUNCTION__, stat);
/* BUSY_STAT: No data yet, so wait for another IRQ. */
ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
/*
* Complete previously submitted bios (if any).
* Status was already verifyied.
*/
while (rq->bio != rq->cbio)
if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
return ide_stopped;
/* Complete rq->buffer based request (ioctls). */
if (!rq->bio && !rq->nr_sectors) {
ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
return ide_stopped;
}
rq->errors = 0;
do {
nsect = rq->current_nr_sectors;
if (nsect > msect)
nsect = msect;
pBuf = task_map_rq(rq, &flags);
DTF("Multiread: %p, nsect: %d, msect: %d, " \
" rq->current_nr_sectors: %d\n",
pBuf, nsect, msect, rq->current_nr_sectors);
taskfile_input_data(drive, pBuf, nsect * SECTOR_WORDS);
task_unmap_rq(rq, pBuf, &flags);
rq->errors = 0;
rq->current_nr_sectors -= nsect;
msect -= nsect;
/*
* FIXME :: We really can not legally get a new page/bh
* regardless, if this is the end of our segment.
* BH walking or segment can only be updated after we have a
* good hwif->INB(IDE_STATUS_REG); return.
*/
if (!rq->current_nr_sectors) {
if (!DRIVER(drive)->end_request(drive, 1, 0))
return ide_stopped;
}
} while (msect);
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
EXPORT_SYMBOL(task_mulin_intr);
task_sectors(drive, rq, nsect, IDE_PIO_IN);
/*
* VERIFY ME before 2.4 ... unexpected race is possible based on details
* RMK with 74LS245/373/374 TTL buffer logic because of passthrough.
*/
ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
{
char *pBuf = NULL;
unsigned long flags;
ide_startstop_t startstop;
if (!rq->nr_sectors)
msect = 0;
else
msect -= nsect;
} while (msect);
if (ide_wait_stat(&startstop, drive, DATA_READY,
drive->bad_wstat, WAIT_DRQ)) {
printk(KERN_ERR "%s: no DRQ after issuing WRITE%s\n",
drive->name,
drive->addressing ? "_EXT" : "");
return startstop;
/* If it was the last datablock check status and finish transfer. */
if (!rq->nr_sectors) {
good_stat = 0;
stat = wait_drive_not_busy(drive);
goto check_status;
}
/* For Write_sectors we need to stuff the first sector */
pBuf = task_map_rq(rq, &flags);
taskfile_output_data(drive, pBuf, SECTOR_WORDS);
rq->current_nr_sectors--;
task_unmap_rq(rq, pBuf, &flags);
/* Still data left to transfer. */
ide_set_handler(drive, &task_mulin_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
EXPORT_SYMBOL(pre_task_out_intr);
EXPORT_SYMBOL(task_mulin_intr);
/*
* Handler for command with PIO data-out phase WRITE
*
* WOOHOO this is a CORRECT STATE DIAGRAM NOW, <andre@linux-ide.org>
* Handler for command with PIO data-out phase (Write).
*/
ide_startstop_t task_out_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
struct request *rq = HWGROUP(drive)->rq;
char *pBuf = NULL;
unsigned long flags;
struct request *rq = HWGROUP(drive)->rq;
u8 stat;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), DRIVE_READY, drive->bad_wstat)) {
DTF("%s: WRITE attempting to recover last " \
"sector counter status=0x%02x\n",
drive->name, stat);
rq->current_nr_sectors++;
return DRIVER(drive)->error(drive, "task_out_intr", stat);
stat = HWIF(drive)->INB(IDE_STATUS_REG);
if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) {
if ((stat & (ERR_STAT | DRQ_STAT)) ||
((stat & WRERR_STAT) && !drive->nowerr))
return DRIVER(drive)->error(drive, __FUNCTION__, stat);
if (stat & BUSY_STAT) {
/* Not ready yet, so wait for another IRQ. */
ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
}
/*
* Safe to update request for partial completions.
* We have a good STATUS CHECK!!!
/* Deal with unexpected ATA data phase. */
if ((!(stat & DATA_READY) && rq->nr_sectors) ||
((stat & DATA_READY) && !rq->nr_sectors))
return DRIVER(drive)->error(drive, __FUNCTION__, stat);
/*
* Complete previously submitted bios (if any).
* Status was already verifyied.
*/
if (!rq->current_nr_sectors)
if (!DRIVER(drive)->end_request(drive, 1, 0))
while (rq->bio != rq->cbio)
if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
return ide_stopped;
if ((rq->current_nr_sectors==1) ^ (stat & DRQ_STAT)) {
rq = HWGROUP(drive)->rq;
pBuf = task_map_rq(rq, &flags);
DTF("write: %p, rq->current_nr_sectors: %d\n",
pBuf, (int) rq->current_nr_sectors);
taskfile_output_data(drive, pBuf, SECTOR_WORDS);
task_unmap_rq(rq, pBuf, &flags);
rq->errors = 0;
rq->current_nr_sectors--;
/* Complete rq->buffer based request (ioctls). */
if (!rq->bio && !rq->nr_sectors) {
ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
return ide_stopped;
}
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
/* Still data left to transfer. */
ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
rq->errors = 0;
task_sectors(drive, rq, 1, IDE_PIO_OUT);
return ide_started;
}
EXPORT_SYMBOL(task_out_intr);
#undef ALTERNATE_STATE_DIAGRAM_MULTI_OUT
ide_startstop_t pre_task_mulout_intr (ide_drive_t *drive, struct request *rq)
ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
{
#ifdef ALTERNATE_STATE_DIAGRAM_MULTI_OUT
ide_hwif_t *hwif = HWIF(drive);
char *pBuf = NULL;
unsigned int nsect = 0, msect = drive->mult_count;
u8 stat;
unsigned long flags;
#endif /* ALTERNATE_STATE_DIAGRAM_MULTI_OUT */
ide_task_t *args = rq->special;
ide_startstop_t startstop;
#if 0
/*
* assign private copy for multi-write
*/
memcpy(&HWGROUP(drive)->wrq, rq, sizeof(struct request));
#endif
if (ide_wait_stat(&startstop, drive, DATA_READY,
drive->bad_wstat, WAIT_DRQ)) {
printk(KERN_ERR "%s: no DRQ after issuing %s\n",
drive->name,
drive->addressing ? "MULTWRITE_EXT" : "MULTWRITE");
drive->bad_wstat, WAIT_DRQ)) {
printk(KERN_ERR "%s: no DRQ after issuing WRITE%s\n",
drive->name, drive->addressing ? "_EXT" : "");
return startstop;
}
#ifdef ALTERNATE_STATE_DIAGRAM_MULTI_OUT
do {
nsect = rq->current_nr_sectors;
if (nsect > msect)
nsect = msect;
pBuf = task_map_rq(rq, &flags);
DTF("Pre-Multiwrite: %p, nsect: %d, msect: %d, " \
"rq->current_nr_sectors: %ld\n",
pBuf, nsect, msect, rq->current_nr_sectors);
msect -= nsect;
taskfile_output_data(drive, pBuf, nsect * SECTOR_WORDS);
task_unmap_rq(rq, pBuf, &flags);
rq->current_nr_sectors -= nsect;
if (!rq->current_nr_sectors) {
if (!DRIVER(drive)->end_request(drive, 1, 0))
if (!rq->bio) {
stat = hwif->INB(IDE_STATUS_REG);
return ide_stopped;
}
}
} while (msect);
rq->errors = 0;
return ide_started;
#else /* ! ALTERNATE_STATE_DIAGRAM_MULTI_OUT */
if (!(drive_is_ready(drive))) {
int i;
for (i=0; i<100; i++) {
if (drive_is_ready(drive))
break;
}
}
/*
* WARNING :: if the drive as not acked good status we may not
* move the DATA-TRANSFER T-Bar as BSY != 0. <andre@linux-ide.org>
*/
return args->handler(drive);
#endif /* ALTERNATE_STATE_DIAGRAM_MULTI_OUT */
return task_out_intr(drive);
}
EXPORT_SYMBOL(pre_task_mulout_intr);
EXPORT_SYMBOL(pre_task_out_intr);
/*
* FIXME before enabling in 2.4 ... DATA integrity issue upon error.
*/
/*
* Handler for command write multiple
* Called directly from execute_drive_cmd for the first bunch of sectors,
* afterwards only by the ISR
* Handler for command with PIO data-out phase (Write Multiple).
*/
ide_startstop_t task_mulout_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 stat = hwif->INB(IDE_STATUS_REG);
struct request *rq = HWGROUP(drive)->rq;
char *pBuf = NULL;
ide_startstop_t startstop = ide_stopped;
unsigned int msect = drive->mult_count;
struct request *rq = HWGROUP(drive)->rq;
unsigned int msect = drive->mult_count;
unsigned int nsect;
unsigned long flags;
u8 stat;
/*
* (ks/hs): Handle last IRQ on multi-sector transfer,
* occurs after all data was sent in this chunk
*/
if (rq->current_nr_sectors == 0) {
if (stat & (ERR_STAT|DRQ_STAT)) {
if (!rq->bio) {
rq->current_nr_sectors += drive->mult_count;
/*
* NOTE: could rewind beyond beginning :-/
*/
} else {
printk(KERN_ERR "%s: MULTI-WRITE assume all data " \
"transfered is bad status=0x%02x\n",
drive->name, stat);
}
return DRIVER(drive)->error(drive, "task_mulout_intr", stat);
stat = HWIF(drive)->INB(IDE_STATUS_REG);
if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat)) {
if ((stat & (ERR_STAT | DRQ_STAT)) ||
((stat & WRERR_STAT) && !drive->nowerr))
return DRIVER(drive)->error(drive, __FUNCTION__, stat);
if (stat & BUSY_STAT) {
/* Not ready yet, so wait for another IRQ. */
ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
if (!rq->bio)
DRIVER(drive)->end_request(drive, 1, 0);
return startstop;
}
/*
* DON'T be lazy code the above and below togather !!!
/* Deal with unexpected ATA data phase. */
if ((!(stat & DATA_READY) && rq->nr_sectors) ||
((stat & DATA_READY) && !rq->nr_sectors))
return DRIVER(drive)->error(drive, __FUNCTION__, stat);
/*
* Complete previously submitted bios (if any).
* Status was already verifyied.
*/
if (!OK_STAT(stat,DATA_READY,BAD_R_STAT)) {
if (stat & (ERR_STAT|DRQ_STAT)) {
if (!rq->bio) {
rq->current_nr_sectors += drive->mult_count;
/*
* NOTE: could rewind beyond beginning :-/
*/
} else {
printk("%s: MULTI-WRITE assume all data " \
"transfered is bad status=0x%02x\n",
drive->name, stat);
}
return DRIVER(drive)->error(drive, "task_mulout_intr", stat);
}
/* no data yet, so wait for another interrupt */
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
return ide_started;
while (rq->bio != rq->cbio)
if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
return ide_stopped;
/* Complete rq->buffer based request (ioctls). */
if (!rq->bio && !rq->nr_sectors) {
ide_end_drive_cmd(drive, stat, HWIF(drive)->INB(IDE_ERROR_REG));
return ide_stopped;
}
#ifndef ALTERNATE_STATE_DIAGRAM_MULTI_OUT
if (HWGROUP(drive)->handler != NULL) {
unsigned long lflags;
spin_lock_irqsave(&ide_lock, lflags);
HWGROUP(drive)->handler = NULL;
del_timer(&HWGROUP(drive)->timer);
spin_unlock_irqrestore(&ide_lock, lflags);
}
#endif /* ALTERNATE_STATE_DIAGRAM_MULTI_OUT */
/* Still data left to transfer. */
ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
rq->errors = 0;
do {
nsect = rq->current_nr_sectors;
if (nsect > msect)
nsect = msect;
pBuf = task_map_rq(rq, &flags);
DTF("Multiwrite: %p, nsect: %d, msect: %d, " \
"rq->current_nr_sectors: %ld\n",
pBuf, nsect, msect, rq->current_nr_sectors);
msect -= nsect;
taskfile_output_data(drive, pBuf, nsect * SECTOR_WORDS);
task_unmap_rq(rq, pBuf, &flags);
rq->current_nr_sectors -= nsect;
/*
* FIXME :: We really can not legally get a new page/bh
* regardless, if this is the end of our segment.
* BH walking or segment can only be updated after we
* have a good hwif->INB(IDE_STATUS_REG); return.
*/
if (!rq->current_nr_sectors) {
if (!DRIVER(drive)->end_request(drive, 1, 0))
if (!rq->bio)
return ide_stopped;
}
task_sectors(drive, rq, nsect, IDE_PIO_OUT);
if (!rq->nr_sectors)
msect = 0;
else
msect -= nsect;
} while (msect);
rq->errors = 0;
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_mulout_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
EXPORT_SYMBOL(task_mulout_intr);
ide_startstop_t pre_task_mulout_intr (ide_drive_t *drive, struct request *rq)
{
ide_startstop_t startstop;
if (ide_wait_stat(&startstop, drive, DATA_READY,
drive->bad_wstat, WAIT_DRQ)) {
printk(KERN_ERR "%s: no DRQ after issuing MULTWRITE%s\n",
drive->name, drive->addressing ? "_EXT" : "");
return startstop;
}
return task_mulout_intr(drive);
}
EXPORT_SYMBOL(pre_task_mulout_intr);
/* Called by internal to feature out type of command being called */
//ide_pre_handler_t * ide_pre_handler_parser (task_struct_t *taskfile, hob_struct_t *hobfile)
ide_pre_handler_t * ide_pre_handler_parser (struct hd_drive_task_hdr *taskfile, struct hd_drive_hob_hdr *hobfile)
......@@ -1092,11 +960,12 @@ int ide_diag_taskfile (ide_drive_t *drive, ide_task_t *args, unsigned long data_
*/
if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
if (data_size == 0)
rq.current_nr_sectors = rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET_HOB] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
/* rq.hard_cur_sectors */
rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET_HOB] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
else
rq.current_nr_sectors = rq.nr_sectors = data_size / SECTOR_SIZE;
/* rq.hard_cur_sectors */
rq.nr_sectors = data_size / SECTOR_SIZE;
rq.hard_nr_sectors = rq.nr_sectors;
rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
}
if (args->tf_out_flags.all == 0) {
......
drivers/ide/legacy/pdc4030.c
View file @ 4949833a
......@@ -94,7 +94,7 @@
#include "pdc4030.h"
static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block);
static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block);
/*
* promise_selectproc() is invoked by ide.c
......@@ -408,67 +408,44 @@ module_exit(pdc4030_mod_exit);
*/
static ide_startstop_t promise_read_intr (ide_drive_t *drive)
{
int total_remaining;
unsigned int sectors_left, sectors_avail, nsect;
struct request *rq;
struct request *rq = HWGROUP(drive)->rq;
ata_status_t status;
#ifdef CONFIG_IDE_TASKFILE_IO
unsigned long flags;
char *to;
#endif /* CONFIG_IDE_TASKFILE_IO */
status.all = HWIF(drive)->INB(IDE_STATUS_REG);
if (!OK_STAT(status.all, DATA_READY, BAD_R_STAT))
return DRIVER(drive)->error(drive,
"promise_read_intr", status.all);
return DRIVER(drive)->error(drive, __FUNCTION__, status.all);
read_again:
do {
sectors_left = HWIF(drive)->INB(IDE_NSECTOR_REG);
HWIF(drive)->INB(IDE_SECTOR_REG);
} while (HWIF(drive)->INB(IDE_NSECTOR_REG) != sectors_left);
rq = HWGROUP(drive)->rq;
sectors_avail = rq->nr_sectors - sectors_left;
if (!sectors_avail)
goto read_again;
read_next:
rq = HWGROUP(drive)->rq;
nsect = rq->current_nr_sectors;
if (nsect > sectors_avail)
nsect = sectors_avail;
sectors_avail -= nsect;
#ifdef CONFIG_IDE_TASKFILE_IO
to = ide_map_buffer(rq, &flags);
HWIF(drive)->ata_input_data(drive, to, nsect * SECTOR_WORDS);
#else /* !CONFIG_IDE_TASKFILE_IO */
HWIF(drive)->ata_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
#endif /* CONFIG_IDE_TASKFILE_IO */
#ifdef DEBUG_READ
printk(KERN_DEBUG "%s: promise_read: sectors(%ld-%ld), "
"buf=0x%08lx, rem=%ld\n", drive->name, (long)rq->sector,
(long)rq->sector+nsect-1,
#ifdef CONFIG_IDE_TASKFILE_IO
(unsigned long) to,
#else /* !CONFIG_IDE_TASKFILE_IO */
(unsigned long) rq->buffer,
#endif /* CONFIG_IDE_TASKFILE_IO */
rq->nr_sectors-nsect);
printk(KERN_DEBUG "%s: %s: sectors(%lu-%lu), rem=%lu\n",
drive->name, __FUNCTION__,
(unsigned long)rq->sector,
(unsigned long)rq->sector + nsect - 1,
(unsigned long)rq->nr_sectors - nsect);
#endif /* DEBUG_READ */
#ifdef CONFIG_IDE_TASKFILE_IO
ide_unmap_buffer(to, &flags);
#else /* !CONFIG_IDE_TASKFILE_IO */
rq->buffer += nsect<<9;
#endif /* CONFIG_IDE_TASKFILE_IO */
rq->sector += nsect;
rq->errors = 0;
rq->nr_sectors -= nsect;
total_remaining = rq->nr_sectors;
if ((rq->current_nr_sectors -= nsect) <= 0) {
DRIVER(drive)->end_request(drive, 1, 0);
}
task_sectors(drive, rq, nsect, IDE_PIO_IN);
/* FIXME: can we check status after transfer on pdc4030? */
/* Complete previously submitted bios. */
while (rq->bio != rq->cbio)
if (!DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio)))
return ide_stopped;
/*
* Now the data has been read in, do the following:
*
......@@ -480,7 +457,7 @@ static ide_startstop_t promise_read_intr (ide_drive_t *drive)
* else if BUSY is asserted, we are going to get an interrupt, so
* set the handler for the interrupt and just return
*/
if (total_remaining > 0) {
if (rq->nr_sectors > 0) {
if (sectors_avail)
goto read_next;
status.all = HWIF(drive)->INB(IDE_STATUS_REG);
......@@ -519,7 +496,6 @@ static ide_startstop_t promise_complete_pollfunc(ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
struct request *rq = hwgroup->rq;
int i;
if ((HWIF(drive)->INB(IDE_STATUS_REG)) & BUSY_STAT) {
if (time_before(jiffies, hwgroup->poll_timeout)) {
......@@ -542,85 +518,35 @@ static ide_startstop_t promise_complete_pollfunc(ide_drive_t *drive)
#ifdef DEBUG_WRITE
printk(KERN_DEBUG "%s: Write complete - end_request\n", drive->name);
#endif /* DEBUG_WRITE */
for (i = rq->nr_sectors; i > 0; ) {
i -= rq->current_nr_sectors;
DRIVER(drive)->end_request(drive, 1, 0);
}
/* Complete previously submitted bios. */
while (rq->bio != rq->cbio)
(void) DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio));
return ide_stopped;
}
/*
* promise_multwrite() transfers a block of up to mcount sectors of data
* to a drive as part of a disk multiple-sector write operation.
*
* Returns 0 on success.
*
* Note that we may be called from two contexts - the do_rw_disk context
* and IRQ context. The IRQ can happen any time after we've output the
* full "mcount" number of sectors, so we must make sure we update the
* state _before_ we output the final part of the data!
*/
int promise_multwrite (ide_drive_t *drive, unsigned int mcount)
static void promise_multwrite (ide_drive_t *drive, unsigned int msect)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
struct request *rq = &hwgroup->wrq;
struct request* rq = HWGROUP(drive)->rq;
unsigned int nsect;
rq->errors = 0;
do {
char *buffer;
int nsect = rq->current_nr_sectors;
#ifdef CONFIG_IDE_TASKFILE_IO
unsigned long flags;
#endif /* CONFIG_IDE_TASKFILE_IO */
if (nsect > mcount)
nsect = mcount;
mcount -= nsect;
#ifdef CONFIG_IDE_TASKFILE_IO
buffer = ide_map_buffer(rq, &flags);
rq->sector += nsect;
#else /* !CONFIG_IDE_TASKFILE_IO */
buffer = rq->buffer;
rq->sector += nsect;
rq->buffer += nsect << 9;
#endif /* CONFIG_IDE_TASKFILE_IO */
rq->nr_sectors -= nsect;
rq->current_nr_sectors -= nsect;
/* Do we move to the next bh after this? */
if (!rq->current_nr_sectors) {
struct bio *bio = rq->bio;
/*
* only move to next bio, when we have processed
* all bvecs in this one.
*/
if (++bio->bi_idx >= bio->bi_vcnt) {
bio->bi_idx = 0;
bio = bio->bi_next;
}
nsect = rq->current_nr_sectors;
if (nsect > msect)
nsect = msect;
/* end early early we ran out of requests */
if (!bio) {
mcount = 0;
} else {
rq->bio = bio;
rq->current_nr_sectors = bio_iovec(bio)->bv_len >> 9;
rq->hard_cur_sectors = rq->current_nr_sectors;
}
}
task_sectors(drive, rq, nsect, IDE_PIO_OUT);
/*
* Ok, we're all setup for the interrupt
* re-entering us on the last transfer.
*/
taskfile_output_data(drive, buffer, nsect<<7);
#ifdef CONFIG_IDE_TASKFILE_IO
ide_unmap_buffer(buffer, &flags);
#endif /* CONFIG_IDE_TASKFILE_IO */
} while (mcount);
return 0;
if (!rq->nr_sectors)
msect = 0;
else
msect -= nsect;
} while (msect);
}
/*
......@@ -629,6 +555,7 @@ int promise_multwrite (ide_drive_t *drive, unsigned int mcount)
static ide_startstop_t promise_write_pollfunc (ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
struct request *rq = hwgroup->rq;
if (HWIF(drive)->INB(IDE_NSECTOR_REG) != 0) {
if (time_before(jiffies, hwgroup->poll_timeout)) {
......@@ -646,6 +573,10 @@ static ide_startstop_t promise_write_pollfunc (ide_drive_t *drive)
HWIF(drive)->INB(IDE_STATUS_REG));
}
/* Complete previously submitted bios. */
while (rq->bio != rq->cbio)
(void) DRIVER(drive)->end_request(drive, 1, bio_sectors(rq->bio));
/*
* Now write out last 4 sectors and poll for not BUSY
*/
......@@ -671,12 +602,13 @@ static ide_startstop_t promise_write_pollfunc (ide_drive_t *drive)
static ide_startstop_t promise_write (ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
struct request *rq = &hwgroup->wrq;
struct request *rq = hwgroup->rq;
#ifdef DEBUG_WRITE
printk(KERN_DEBUG "%s: promise_write: sectors(%ld-%ld), "
"buffer=%p\n", drive->name, (long)rq->sector,
(long)rq->sector + rq->nr_sectors - 1, rq->buffer);
printk(KERN_DEBUG "%s: %s: sectors(%lu-%lu)\n",
drive->name, __FUNCTION__,
(unsigned long)rq->sector,
(unsigned long)rq->sector + rq->nr_sectors - 1);
#endif /* DEBUG_WRITE */
/*
......@@ -684,8 +616,7 @@ static ide_startstop_t promise_write (ide_drive_t *drive)
* the polling strategy as defined above.
*/
if (rq->nr_sectors > 4) {
if (promise_multwrite(drive, rq->nr_sectors - 4))
return ide_stopped;
promise_multwrite(drive, rq->nr_sectors - 4);
hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
if (hwgroup->handler != NULL) /* paranoia check */
BUG();
......@@ -696,8 +627,7 @@ static ide_startstop_t promise_write (ide_drive_t *drive)
* There are 4 or fewer sectors to transfer, do them all in one go
* and wait for NOT BUSY.
*/
if (promise_multwrite(drive, rq->nr_sectors))
return ide_stopped;
promise_multwrite(drive, rq->nr_sectors);
hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
if (hwgroup->handler != NULL)
BUG();
......@@ -720,26 +650,14 @@ static ide_startstop_t promise_write (ide_drive_t *drive)
* already set up. It issues a READ or WRITE command to the Promise
* controller, assuming LBA has been used to set up the block number.
*/
#ifndef CONFIG_IDE_TASKFILE_IO
ide_startstop_t do_pdc4030_io (ide_drive_t *drive, struct request *rq)
{
#else /* CONFIG_IDE_TASKFILE_IO */
ide_startstop_t do_pdc4030_io (ide_drive_t *drive, ide_task_t *task)
static ide_startstop_t do_pdc4030_io (ide_drive_t *drive, ide_task_t *task)
{
struct request *rq = HWGROUP(drive)->rq;
task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
#endif /* CONFIG_IDE_TASKFILE_IO */
ide_startstop_t startstop;
unsigned long timeout;
u8 stat = 0;
if (!blk_fs_request(rq)) {
blk_dump_rq_flags(rq, "do_pdc4030_io - bad command");
DRIVER(drive)->end_request(drive, 0, 0);
return ide_stopped;
}
#ifdef CONFIG_IDE_TASKFILE_IO
if (IDE_CONTROL_REG)
HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
SELECT_MASK(drive, 0);
......@@ -752,12 +670,8 @@ ide_startstop_t do_pdc4030_io (ide_drive_t *drive, ide_task_t *task)
HWIF(drive)->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
HWIF(drive)->OUTB(taskfile->device_head, IDE_SELECT_REG);
HWIF(drive)->OUTB(taskfile->command, IDE_COMMAND_REG);
#endif /* CONFIG_IDE_TASKFILE_IO */
if (rq_data_dir(rq) == READ) {
#ifndef CONFIG_IDE_TASKFILE_IO
HWIF(drive)->OUTB(PROMISE_READ, IDE_COMMAND_REG);
#endif /* CONFIG_IDE_TASKFILE_IO */
/*
* The card's behaviour is odd at this point. If the data is
* available, DRQ will be true, and no interrupt will be
......@@ -793,9 +707,6 @@ ide_startstop_t do_pdc4030_io (ide_drive_t *drive, ide_task_t *task)
"waiting - Odd!\n", drive->name);
return ide_stopped;
} else {
#ifndef CONFIG_IDE_TASKFILE_IO
HWIF(drive)->OUTB(PROMISE_WRITE, IDE_COMMAND_REG);
#endif /* CONFIG_IDE_TASKFILE_IO */
if (ide_wait_stat(&startstop, drive, DATA_READY,
drive->bad_wstat, WAIT_DRQ)) {
printk(KERN_ERR "%s: no DRQ after issuing "
......@@ -804,12 +715,11 @@ ide_startstop_t do_pdc4030_io (ide_drive_t *drive, ide_task_t *task)
}
if (!drive->unmask)
local_irq_disable();
HWGROUP(drive)->wrq = *rq; /* scratchpad */
return promise_write(drive);
}
}
static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
/* The four drives on the two logical (one physical) interfaces
are distinguished by writing the drive number (0-3) to the
......@@ -817,33 +727,22 @@ static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq,
FIXME: Is promise_selectproc now redundant??
*/
int drive_number = (HWIF(drive)->channel << 1) + drive->select.b.unit;
#ifndef CONFIG_IDE_TASKFILE_IO
ide_hwif_t *hwif = HWIF(drive);
struct hd_drive_task_hdr taskfile;
ide_task_t args;
BUG_ON(rq->nr_sectors > 127);
if (IDE_CONTROL_REG)
hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
if (!blk_fs_request(rq)) {
blk_dump_rq_flags(rq, "promise_rw_disk - bad command");
DRIVER(drive)->end_request(drive, 0, 0);
return ide_stopped;
}
#ifdef DEBUG
printk("%s: %sing: LBAsect=%ld, sectors=%ld, "
"buffer=0x%08lx\n", drive->name,
(rq->cmd==READ)?"read":"writ", block,
rq->nr_sectors, (unsigned long) rq->buffer);
printk(KERN_DEBUG "%s: %sing: LBAsect=%lu, sectors=%lu\n",
drive->name, rq_data_dir(rq) ? "writ" : "read",
block, rq->nr_sectors);
#endif
hwif->OUTB(drive_number, IDE_FEATURE_REG);
hwif->OUTB(rq->nr_sectors, IDE_NSECTOR_REG);
hwif->OUTB(block,IDE_SECTOR_REG);
hwif->OUTB(block>>=8,IDE_LCYL_REG);
hwif->OUTB(block>>=8,IDE_HCYL_REG);
hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
return do_pdc4030_io(drive, rq);
#else /* CONFIG_IDE_TASKFILE_IO */
struct hd_drive_task_hdr taskfile;
ide_task_t args;
memset(&taskfile, 0, sizeof(struct hd_drive_task_hdr));
......@@ -867,5 +766,4 @@ static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq,
rq->special = (ide_task_t *)&args;
return do_pdc4030_io(drive, &args);
#endif /* CONFIG_IDE_TASKFILE_IO */
}
include/linux/blkdev.h
View file @ 4949833a
......@@ -457,6 +457,7 @@ extern void blk_queue_invalidate_tags(request_queue_t *);
extern void blk_congestion_wait(int rw, long timeout);
extern void blk_rq_bio_prep(request_queue_t *, struct request *, struct bio *);
extern void blk_rq_prep_restart(struct request *);
#define MAX_PHYS_SEGMENTS 128
#define MAX_HW_SEGMENTS 128
......
include/linux/ide.h
View file @ 4949833a
......@@ -817,33 +817,25 @@ typedef struct ide_dma_ops_s {
*
* temporarily mapping a (possible) highmem bio for PIO transfer
*/
#define ide_rq_offset(rq) \
(((rq)->hard_cur_sectors - (rq)->current_nr_sectors) << 9)
/*
* taskfiles really should use hard_cur_sectors as well!
*/
#define task_rq_offset(rq) \
(((rq)->nr_sectors - (rq)->current_nr_sectors) * SECTOR_SIZE)
static inline void *ide_map_buffer(struct request *rq, unsigned long *flags)
static inline void *task_map_rq(struct request *rq, unsigned long *flags)
{
/*
* fs request
*/
if (rq->bio)
return bio_kmap_irq(rq->bio, flags) + ide_rq_offset(rq);
if (rq->cbio)
return rq_map_buffer(rq, flags);
/*
* task request
*/
return rq->buffer + task_rq_offset(rq);
return rq->buffer + blk_rq_offset(rq);
}
static inline void ide_unmap_buffer(struct request *rq, char *buffer, unsigned long *flags)
static inline void task_unmap_rq(struct request *rq, char *buffer, unsigned long *flags)
{
if (rq->bio)
bio_kunmap_irq(buffer, flags);
if (rq->cbio)
rq_unmap_buffer(buffer, flags);
}
#define IDE_CHIPSET_PCI_MASK \
......@@ -1418,6 +1410,31 @@ extern void atapi_output_bytes(ide_drive_t *, void *, u32);
extern void taskfile_input_data(ide_drive_t *, void *, u32);
extern void taskfile_output_data(ide_drive_t *, void *, u32);
#define IDE_PIO_IN 0
#define IDE_PIO_OUT 1
static inline void task_sectors(ide_drive_t *drive, struct request *rq,
unsigned nsect, int rw)
{
unsigned long flags;
char *buf;
buf = task_map_rq(rq, &flags);
/*
* IRQ can happen instantly after reading/writing
* last sector of the datablock.
*/
process_that_request_first(rq, nsect);
if (rw == IDE_PIO_OUT)
taskfile_output_data(drive, buf, nsect * SECTOR_WORDS);
else
taskfile_input_data(drive, buf, nsect * SECTOR_WORDS);
task_unmap_rq(rq, buf, &flags);
}
extern int drive_is_ready(ide_drive_t *);
extern int wait_for_ready(ide_drive_t *, int /* timeout */);
......
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