/*
* linux/drivers/ide/ide-taskfile.c Version 0.38 March 05, 2003
*
* Copyright (C) 2000-2002 Michael Cornwell <cornwell@acm.org>
* 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.
*
* Problems to be fixed because of BH interface or the lack therefore.
*
* Fill me in stupid !!!
*
* HOST:
* General refers to the Controller and Driver "pair".
* DATA HANDLER:
* Under the context of Linux it generally refers to an interrupt handler.
* However, it correctly describes the 'HOST'
* DATA BLOCK:
* The amount of data needed to be transfered as predefined in the
* setup of the device.
* STORAGE ATOMIC:
* The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as
* small as a single sector or as large as the entire command block
* request.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/blkpg.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/bitops.h>
#define DEBUG_TASKFILE 0 /* unset when fixed */
#if DEBUG_TASKFILE
#define DTF(x...) printk(x)
#else
#define DTF(x...)
#endif
static void ata_bswap_data (void *buffer, int wcount)
{
u16 *p = buffer;
while (wcount--) {
*p = *p << 8 | *p >> 8; p++;
*p = *p << 8 | *p >> 8; p++;
}
}
void taskfile_input_data (ide_drive_t *drive, void *buffer, u32 wcount)
{
HWIF(drive)->ata_input_data(drive, buffer, wcount);
if (drive->bswap)
ata_bswap_data(buffer, wcount);
}
EXPORT_SYMBOL(taskfile_input_data);
void taskfile_output_data (ide_drive_t *drive, void *buffer, u32 wcount)
{
if (drive->bswap) {
ata_bswap_data(buffer, wcount);
HWIF(drive)->ata_output_data(drive, buffer, wcount);
ata_bswap_data(buffer, wcount);
} else {
HWIF(drive)->ata_output_data(drive, buffer, wcount);
}
}
EXPORT_SYMBOL(taskfile_output_data);
int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
{
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
if (drive->media == ide_disk)
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_IDENTIFY;
else
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_PIDENTIFY;
args.command_type = IDE_DRIVE_TASK_IN;
args.handler = &task_in_intr;
return ide_raw_taskfile(drive, &args, buf);
}
EXPORT_SYMBOL(taskfile_lib_get_identify);
#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
void debug_taskfile (ide_drive_t *drive, ide_task_t *args)
{
printk(KERN_INFO "%s: ", drive->name);
// printk("TF.0=x%02x ", args->tfRegister[IDE_DATA_OFFSET]);
printk("TF.1=x%02x ", args->tfRegister[IDE_FEATURE_OFFSET]);
printk("TF.2=x%02x ", args->tfRegister[IDE_NSECTOR_OFFSET]);
printk("TF.3=x%02x ", args->tfRegister[IDE_SECTOR_OFFSET]);
printk("TF.4=x%02x ", args->tfRegister[IDE_LCYL_OFFSET]);
printk("TF.5=x%02x ", args->tfRegister[IDE_HCYL_OFFSET]);
printk("TF.6=x%02x ", args->tfRegister[IDE_SELECT_OFFSET]);
printk("TF.7=x%02x\n", args->tfRegister[IDE_COMMAND_OFFSET]);
printk(KERN_INFO "%s: ", drive->name);
// printk("HTF.0=x%02x ", args->hobRegister[IDE_DATA_OFFSET]);
printk("HTF.1=x%02x ", args->hobRegister[IDE_FEATURE_OFFSET]);
printk("HTF.2=x%02x ", args->hobRegister[IDE_NSECTOR_OFFSET]);
printk("HTF.3=x%02x ", args->hobRegister[IDE_SECTOR_OFFSET]);
printk("HTF.4=x%02x ", args->hobRegister[IDE_LCYL_OFFSET]);
printk("HTF.5=x%02x ", args->hobRegister[IDE_HCYL_OFFSET]);
printk("HTF.6=x%02x ", args->hobRegister[IDE_SELECT_OFFSET]);
printk("HTF.7=x%02x\n", args->hobRegister[IDE_CONTROL_OFFSET_HOB]);
}
#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */
ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
{
ide_hwif_t *hwif = HWIF(drive);
task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF;
#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
void debug_taskfile(drive, task);
#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */
/* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
if (IDE_CONTROL_REG) {
/* clear nIEN */
hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
}
SELECT_MASK(drive, 0);
if (drive->addressing == 1) {
hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
}
hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
#ifdef CONFIG_IDE_TASKFILE_IO
if (task->handler != 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;
}
#else
if (task->handler != NULL) {
ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
if (task->prehandler != NULL)
return task->prehandler(drive, task->rq);
return ide_started;
}
#endif
if (!drive->using_dma)
return ide_stopped;
switch (taskfile->command) {
case WIN_WRITEDMA_ONCE:
case WIN_WRITEDMA:
case WIN_WRITEDMA_EXT:
if (!hwif->ide_dma_write(drive))
return ide_started;
break;
case WIN_READDMA_ONCE:
case WIN_READDMA:
case WIN_READDMA_EXT:
case WIN_IDENTIFY_DMA:
if (!hwif->ide_dma_read(drive))
return ide_started;
break;
default:
if (task->handler == NULL)
return ide_stopped;
}
return ide_stopped;
}
EXPORT_SYMBOL(do_rw_taskfile);
/*
* set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
*/
ide_startstop_t set_multmode_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 stat;
if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
drive->mult_count = drive->mult_req;
} else {
drive->mult_req = drive->mult_count = 0;
drive->special.b.recalibrate = 1;
(void) ide_dump_status(drive, "set_multmode", stat);
}
return ide_stopped;
}
EXPORT_SYMBOL(set_multmode_intr);
/*
* set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
*/
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--)
udelay(10);
if (OK_STAT(stat, READY_STAT, BAD_STAT))
return ide_stopped;
if (stat & (ERR_STAT|DRQ_STAT))
return DRIVER(drive)->error(drive, "set_geometry_intr", stat);
if (HWGROUP(drive)->handler != NULL)
BUG();
ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
EXPORT_SYMBOL(set_geometry_intr);
/*
* recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
*/
ide_startstop_t recal_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 stat;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
return DRIVER(drive)->error(drive, "recal_intr", stat);
return ide_stopped;
}
EXPORT_SYMBOL(recal_intr);
/*
* Handler for commands without a data phase
*/
ide_startstop_t task_no_data_intr (ide_drive_t *drive)
{
ide_task_t *args = HWGROUP(drive)->rq->special;
ide_hwif_t *hwif = HWIF(drive);
u8 stat;
local_irq_enable();
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
DTF("%s: command opcode 0x%02x\n", drive->name,
args->tfRegister[IDE_COMMAND_OFFSET]);
return DRIVER(drive)->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));
return ide_stopped;
}
EXPORT_SYMBOL(task_no_data_intr);
/*
* old taskfile PIO handlers, to be killed as soon as possible.
*/
#ifndef CONFIG_IDE_TASKFILE_IO
/*
* 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;
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, "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;
}
}
pBuf = rq->buffer + task_rq_offset(rq);
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);
/* FIXME: check drive status */
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
*/
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;
unsigned int nsect;
u8 stat;
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, "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);
return ide_started;
}
do {
nsect = rq->current_nr_sectors;
if (nsect > msect)
nsect = msect;
pBuf = rq->buffer + task_rq_offset(rq);
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);
rq->errors = 0;
rq->current_nr_sectors -= nsect;
msect -= nsect;
/* FIXME: check drive status */
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);
/*
* 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)
{
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 WRITE%s\n",
drive->name,
drive->addressing ? "_EXT" : "");
return startstop;
}
/* For Write_sectors we need to stuff the first sector */
taskfile_output_data(drive, rq->buffer + task_rq_offset(rq), SECTOR_WORDS);
rq->current_nr_sectors--;
return ide_started;
}
EXPORT_SYMBOL(pre_task_out_intr);
/*
* Handler for command with PIO data-out phase WRITE
*
* WOOHOO this is a CORRECT STATE DIAGRAM NOW, <andre@linux-ide.org>
*/
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;
u8 stat;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), DRIVE_READY, drive->bad_wstat)) {
return DRIVER(drive)->error(drive, "task_out_intr", stat);
}
/*
* Safe to update request for partial completions.
* We have a good STATUS CHECK!!!
*/
if (!rq->current_nr_sectors)
if (!DRIVER(drive)->end_request(drive, 1, 0))
return ide_stopped;
if ((rq->current_nr_sectors==1) ^ (stat & DRQ_STAT)) {
rq = HWGROUP(drive)->rq;
pBuf = rq->buffer + task_rq_offset(rq);
DTF("write: %p, rq->current_nr_sectors: %d\n",
pBuf, (int) rq->current_nr_sectors);
taskfile_output_data(drive, pBuf, SECTOR_WORDS);
rq->errors = 0;
rq->current_nr_sectors--;
}
if (HWGROUP(drive)->handler == NULL)
ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
EXPORT_SYMBOL(task_out_intr);
ide_startstop_t pre_task_mulout_intr (ide_drive_t *drive, struct request *rq)
{
ide_task_t *args = rq->special;
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 %s\n",
drive->name,
drive->addressing ? "MULTWRITE_EXT" : "MULTWRITE");
return startstop;
}
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);
}
EXPORT_SYMBOL(pre_task_mulout_intr);
/*
* Handler for command write multiple
* Called directly from execute_drive_cmd for the first bunch of sectors,
* afterwards only by the ISR
*/
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;
unsigned int msect = drive->mult_count;
unsigned int nsect;
if (!OK_STAT(stat, DATA_READY, BAD_R_STAT) || !rq->current_nr_sectors) {
if (stat & (ERR_STAT|DRQ_STAT)) {
return DRIVER(drive)->error(drive, "task_mulout_intr", stat);
}
/* Handle last IRQ, occurs after all data was sent. */
if (!rq->current_nr_sectors) {
DRIVER(drive)->end_request(drive, 1, 0);
return ide_stopped;
}
/* 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;
}
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);
}
do {
nsect = rq->current_nr_sectors;
if (nsect > msect)
nsect = msect;
pBuf = rq->buffer + task_rq_offset(rq);
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);
rq->current_nr_sectors -= nsect;
/* FIXME: check drive status */
if (!rq->current_nr_sectors) {
if (!DRIVER(drive)->end_request(drive, 1, 0))
if (!rq->bio)
return ide_stopped;
}
} 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);
#else /* !CONFIG_IDE_TASKFILE_IO */
static u8 wait_drive_not_busy(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
int retries = 100;
u8 stat;
/*
* Last sector was transfered, wait until drive is ready.
* This can take up to 10 usec, but we will wait max 1 ms
* (drive_cmd_intr() waits that long).
*/
while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
udelay(10);
if (!retries)
printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
return stat;
}
/*
* 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;
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;
}
/*
* 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;
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);
return ide_started;
}
EXPORT_SYMBOL(task_in_intr);
/*
* Handler for command with PIO data-in phase (Read Multiple).
*/
ide_startstop_t task_mulin_intr (ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
unsigned int msect = drive->mult_count;
unsigned int nsect;
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;
task_sectors(drive, rq, nsect, IDE_PIO_IN);
if (!rq->nr_sectors)
msect = 0;
else
msect -= nsect;
} while (msect);
/* 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_mulin_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
EXPORT_SYMBOL(task_mulin_intr);
/*
* Handler for command with PIO data-out phase (Write).
*/
ide_startstop_t task_out_intr (ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
u8 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;
}
}
/* 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.
*/
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;
}
/* 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);
ide_startstop_t pre_task_out_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 WRITE%s\n",
drive->name, drive->addressing ? "_EXT" : "");
return startstop;
}
if (!drive->unmask)
local_irq_disable();
return task_out_intr(drive);
}
EXPORT_SYMBOL(pre_task_out_intr);
/*
* Handler for command with PIO data-out phase (Write Multiple).
*/
ide_startstop_t task_mulout_intr (ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
unsigned int msect = drive->mult_count;
unsigned int nsect;
u8 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;
}
}
/* 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.
*/
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;
}
/* 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;
task_sectors(drive, rq, nsect, IDE_PIO_OUT);
if (!rq->nr_sectors)
msect = 0;
else
msect -= nsect;
} while (msect);
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;
}
if (!drive->unmask)
local_irq_disable();
return task_mulout_intr(drive);
}
EXPORT_SYMBOL(pre_task_mulout_intr);
#endif /* !CONFIG_IDE_TASKFILE_IO */
int ide_diag_taskfile (ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
{
struct request rq;
memset(&rq, 0, sizeof(rq));
rq.flags = REQ_DRIVE_TASKFILE;
rq.buffer = buf;
/*
* (ks) We transfer currently only whole sectors.
* This is suffient for now. But, it would be great,
* if we would find a solution to transfer any size.
* To support special commands like READ LONG.
*/
if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
if (data_size == 0)
rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
else
rq.nr_sectors = data_size / SECTOR_SIZE;
if (!rq.nr_sectors) {
printk(KERN_ERR "%s: in/out command without data\n",
drive->name);
return -EFAULT;
}
rq.hard_nr_sectors = rq.nr_sectors;
rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
}
rq.special = args;
return ide_do_drive_cmd(drive, &rq, ide_wait);
}
EXPORT_SYMBOL(ide_diag_taskfile);
int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
{
return ide_diag_taskfile(drive, args, 0, buf);
}
EXPORT_SYMBOL(ide_raw_taskfile);
#define MAX_DMA (256*SECTOR_WORDS)
ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
ide_startstop_t flagged_task_no_data_intr(ide_drive_t *);
ide_startstop_t flagged_task_in_intr(ide_drive_t *);
ide_startstop_t flagged_task_mulin_intr(ide_drive_t *);
ide_startstop_t flagged_pre_task_out_intr(ide_drive_t *, struct request *);
ide_startstop_t flagged_task_out_intr(ide_drive_t *);
ide_startstop_t flagged_pre_task_mulout_intr(ide_drive_t *, struct request *);
ide_startstop_t flagged_task_mulout_intr(ide_drive_t *);
int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
{
ide_task_request_t *req_task;
ide_task_t args;
u8 *outbuf = NULL;
u8 *inbuf = NULL;
task_ioreg_t *argsptr = args.tfRegister;
task_ioreg_t *hobsptr = args.hobRegister;
int err = 0;
int tasksize = sizeof(struct ide_task_request_s);
int taskin = 0;
int taskout = 0;
u8 io_32bit = drive->io_32bit;
char __user *buf = (char __user *)arg;
// printk("IDE Taskfile ...\n");
req_task = kmalloc(tasksize, GFP_KERNEL);
if (req_task == NULL) return -ENOMEM;
memset(req_task, 0, tasksize);
if (copy_from_user(req_task, buf, tasksize)) {
kfree(req_task);
return -EFAULT;
}
taskout = (int) req_task->out_size;
taskin = (int) req_task->in_size;
if (taskout) {
int outtotal = tasksize;
outbuf = kmalloc(taskout, GFP_KERNEL);
if (outbuf == NULL) {
err = -ENOMEM;
goto abort;
}
memset(outbuf, 0, taskout);
if (copy_from_user(outbuf, buf + outtotal, taskout)) {
err = -EFAULT;
goto abort;
}
}
if (taskin) {
int intotal = tasksize + taskout;
inbuf = kmalloc(taskin, GFP_KERNEL);
if (inbuf == NULL) {
err = -ENOMEM;
goto abort;
}
memset(inbuf, 0, taskin);
if (copy_from_user(inbuf, buf + intotal, taskin)) {
err = -EFAULT;
goto abort;
}
}
memset(&args, 0, sizeof(ide_task_t));
memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
args.tf_in_flags = req_task->in_flags;
args.tf_out_flags = req_task->out_flags;
args.data_phase = req_task->data_phase;
args.command_type = req_task->req_cmd;
drive->io_32bit = 0;
switch(req_task->data_phase) {
case TASKFILE_OUT_DMAQ:
case TASKFILE_OUT_DMA:
err = ide_diag_taskfile(drive, &args, taskout, outbuf);
break;
case TASKFILE_IN_DMAQ:
case TASKFILE_IN_DMA:
err = ide_diag_taskfile(drive, &args, taskin, inbuf);
break;
case TASKFILE_IN_OUT:
#if 0
args.prehandler = &pre_task_out_intr;
args.handler = &task_out_intr;
err = ide_diag_taskfile(drive, &args, taskout, outbuf);
args.prehandler = NULL;
args.handler = &task_in_intr;
err = ide_diag_taskfile(drive, &args, taskin, inbuf);
break;
#else
err = -EFAULT;
goto abort;
#endif
case TASKFILE_MULTI_OUT:
if (!drive->mult_count) {
/* (hs): give up if multcount is not set */
printk(KERN_ERR "%s: %s Multimode Write " \
"multcount is not set\n",
drive->name, __FUNCTION__);
err = -EPERM;
goto abort;
}
if (args.tf_out_flags.all != 0) {
args.prehandler = &flagged_pre_task_mulout_intr;
args.handler = &flagged_task_mulout_intr;
} else {
args.prehandler = &pre_task_mulout_intr;
args.handler = &task_mulout_intr;
}
err = ide_diag_taskfile(drive, &args, taskout, outbuf);
break;
case TASKFILE_OUT:
if (args.tf_out_flags.all != 0) {
args.prehandler = &flagged_pre_task_out_intr;
args.handler = &flagged_task_out_intr;
} else {
args.prehandler = &pre_task_out_intr;
args.handler = &task_out_intr;
}
err = ide_diag_taskfile(drive, &args, taskout, outbuf);
break;
case TASKFILE_MULTI_IN:
if (!drive->mult_count) {
/* (hs): give up if multcount is not set */
printk(KERN_ERR "%s: %s Multimode Read failure " \
"multcount is not set\n",
drive->name, __FUNCTION__);
err = -EPERM;
goto abort;
}
if (args.tf_out_flags.all != 0) {
args.handler = &flagged_task_mulin_intr;
} else {
args.handler = &task_mulin_intr;
}
err = ide_diag_taskfile(drive, &args, taskin, inbuf);
break;
case TASKFILE_IN:
if (args.tf_out_flags.all != 0) {
args.handler = &flagged_task_in_intr;
} else {
args.handler = &task_in_intr;
}
err = ide_diag_taskfile(drive, &args, taskin, inbuf);
break;
case TASKFILE_NO_DATA:
if (args.tf_out_flags.all != 0) {
args.handler = &flagged_task_no_data_intr;
} else {
args.handler = &task_no_data_intr;
}
err = ide_diag_taskfile(drive, &args, 0, NULL);
break;
default:
err = -EFAULT;
goto abort;
}
memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
req_task->in_flags = args.tf_in_flags;
req_task->out_flags = args.tf_out_flags;
if (copy_to_user(buf, req_task, tasksize)) {
err = -EFAULT;
goto abort;
}
if (taskout) {
int outtotal = tasksize;
if (copy_to_user(buf + outtotal, outbuf, taskout)) {
err = -EFAULT;
goto abort;
}
}
if (taskin) {
int intotal = tasksize + taskout;
if (copy_to_user(buf + intotal, inbuf, taskin)) {
err = -EFAULT;
goto abort;
}
}
abort:
kfree(req_task);
if (outbuf != NULL)
kfree(outbuf);
if (inbuf != NULL)
kfree(inbuf);
// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
drive->io_32bit = io_32bit;
return err;
}
EXPORT_SYMBOL(ide_taskfile_ioctl);
int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
{
struct request rq;
u8 buffer[4];
if (!buf)
buf = buffer;
memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
ide_init_drive_cmd(&rq);
rq.buffer = buf;
*buf++ = cmd;
*buf++ = nsect;
*buf++ = feature;
*buf++ = sectors;
return ide_do_drive_cmd(drive, &rq, ide_wait);
}
EXPORT_SYMBOL(ide_wait_cmd);
/*
* FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
*/
int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
{
int err = 0;
u8 args[4], *argbuf = args;
u8 xfer_rate = 0;
int argsize = 4;
ide_task_t tfargs;
if (NULL == (void *) arg) {
struct request rq;
ide_init_drive_cmd(&rq);
return ide_do_drive_cmd(drive, &rq, ide_wait);
}
if (copy_from_user(args, (void __user *)arg, 4))
return -EFAULT;
memset(&tfargs, 0, sizeof(ide_task_t));
tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
tfargs.tfRegister[IDE_SECTOR_OFFSET] = args[1];
tfargs.tfRegister[IDE_LCYL_OFFSET] = 0x00;
tfargs.tfRegister[IDE_HCYL_OFFSET] = 0x00;
tfargs.tfRegister[IDE_SELECT_OFFSET] = 0x00;
tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
if (args[3]) {
argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
argbuf = kmalloc(argsize, GFP_KERNEL);
if (argbuf == NULL)
return -ENOMEM;
memcpy(argbuf, args, 4);
}
if (set_transfer(drive, &tfargs)) {
xfer_rate = args[1];
if (ide_ata66_check(drive, &tfargs))
goto abort;
}
err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
if (!err && xfer_rate) {
/* active-retuning-calls future */
ide_set_xfer_rate(drive, xfer_rate);
ide_driveid_update(drive);
}
abort:
if (copy_to_user((void __user *)arg, argbuf, argsize))
err = -EFAULT;
if (argsize > 4)
kfree(argbuf);
return err;
}
EXPORT_SYMBOL(ide_cmd_ioctl);
int ide_wait_cmd_task (ide_drive_t *drive, u8 *buf)
{
struct request rq;
ide_init_drive_cmd(&rq);
rq.flags = REQ_DRIVE_TASK;
rq.buffer = buf;
return ide_do_drive_cmd(drive, &rq, ide_wait);
}
EXPORT_SYMBOL(ide_wait_cmd_task);
/*
* FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
*/
int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
{
void __user *p = (void __user *)arg;
int err = 0;
u8 args[7], *argbuf = args;
int argsize = 7;
if (copy_from_user(args, p, 7))
return -EFAULT;
err = ide_wait_cmd_task(drive, argbuf);
if (copy_to_user(p, argbuf, argsize))
err = -EFAULT;
return err;
}
EXPORT_SYMBOL(ide_task_ioctl);
/*
* NOTICE: This is additions from IBM to provide a discrete interface,
* for selective taskregister access operations. Nice JOB Klaus!!!
* Glad to be able to work and co-develop this with you and IBM.
*/
ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
{
ide_hwif_t *hwif = HWIF(drive);
task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
hob_struct_t *hobfile = (hob_struct_t *) task->hobRegister;
#if DEBUG_TASKFILE
u8 status;
#endif
#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
void debug_taskfile(drive, task);
#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */
/*
* (ks) Check taskfile in/out flags.
* If set, then execute as it is defined.
* If not set, then define default settings.
* The default values are:
* write and read all taskfile registers (except data)
* write and read the hob registers (sector,nsector,lcyl,hcyl)
*/
if (task->tf_out_flags.all == 0) {
task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS;
if (drive->addressing == 1)
task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8);
}
if (task->tf_in_flags.all == 0) {
task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
if (drive->addressing == 1)
task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
}
/* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
if (IDE_CONTROL_REG)
/* clear nIEN */
hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
SELECT_MASK(drive, 0);
#if DEBUG_TASKFILE
status = hwif->INB(IDE_STATUS_REG);
if (status & 0x80) {
printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status);
udelay(100);
status = hwif->INB(IDE_STATUS_REG);
printk("flagged_taskfile -> Status = %02x\n", status);
}
#endif
if (task->tf_out_flags.b.data) {
u16 data = taskfile->data + (hobfile->data << 8);
hwif->OUTW(data, IDE_DATA_REG);
}
/* (ks) send hob registers first */
if (task->tf_out_flags.b.nsector_hob)
hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
if (task->tf_out_flags.b.sector_hob)
hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
if (task->tf_out_flags.b.lcyl_hob)
hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
if (task->tf_out_flags.b.hcyl_hob)
hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
/* (ks) Send now the standard registers */
if (task->tf_out_flags.b.error_feature)
hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
/* refers to number of sectors to transfer */
if (task->tf_out_flags.b.nsector)
hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
/* refers to sector offset or start sector */
if (task->tf_out_flags.b.sector)
hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
if (task->tf_out_flags.b.lcyl)
hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
if (task->tf_out_flags.b.hcyl)
hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
/*
* (ks) In the flagged taskfile approch, we will used all specified
* registers and the register value will not be changed. Except the
* select bit (master/slave) in the drive_head register. We must make
* sure that the desired drive is selected.
*/
hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
switch(task->data_phase) {
case TASKFILE_OUT_DMAQ:
case TASKFILE_OUT_DMA:
hwif->ide_dma_write(drive);
break;
case TASKFILE_IN_DMAQ:
case TASKFILE_IN_DMA:
hwif->ide_dma_read(drive);
break;
default:
if (task->handler == NULL)
return ide_stopped;
/* Issue the command */
ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
if (task->prehandler != NULL)
return task->prehandler(drive, HWGROUP(drive)->rq);
}
return ide_started;
}
EXPORT_SYMBOL(flagged_taskfile);
ide_startstop_t flagged_task_no_data_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 stat;
local_irq_enable();
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT)) {
if (stat & ERR_STAT) {
return DRIVER(drive)->error(drive, "flagged_task_no_data_intr", stat);
}
/*
* (ks) Unexpected ATA data phase detected.
* This should not happen. But, it can !
* I am not sure, which function is best to clean up
* this situation. I choose: ide_error(...)
*/
return DRIVER(drive)->error(drive, "flagged_task_no_data_intr (unexpected phase)", stat);
}
ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
return ide_stopped;
}
/*
* Handler for command with PIO data-in phase
*/
ide_startstop_t flagged_task_in_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;
int retries = 5;
if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
if (stat & ERR_STAT) {
return DRIVER(drive)->error(drive, "flagged_task_in_intr", stat);
}
/*
* (ks) Unexpected ATA data phase detected.
* This should not happen. But, it can !
* I am not sure, which function is best to clean up
* this situation. I choose: ide_error(...)
*/
return DRIVER(drive)->error(drive, "flagged_task_in_intr (unexpected data phase)", stat);
}
pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
DTF("Read - rq->current_nr_sectors: %d, status: %02x\n", (int) rq->current_nr_sectors, stat);
taskfile_input_data(drive, pBuf, SECTOR_WORDS);
if (--rq->current_nr_sectors != 0) {
/*
* (ks) We don't know which command was executed.
* So, we wait the 'WORSTCASE' value.
*/
ide_set_handler(drive, &flagged_task_in_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
/*
* (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);
ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
return ide_stopped;
}
ide_startstop_t flagged_task_mulin_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;
int retries = 5;
unsigned int msect, nsect;
msect = drive->mult_count;
if (msect == 0)
return DRIVER(drive)->error(drive, "flagged_task_mulin_intr (multimode not set)", stat);
if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
if (stat & ERR_STAT) {
return DRIVER(drive)->error(drive, "flagged_task_mulin_intr", stat);
}
/*
* (ks) Unexpected ATA data phase detected.
* This should not happen. But, it can !
* I am not sure, which function is best to clean up
* this situation. I choose: ide_error(...)
*/
return DRIVER(drive)->error(drive, "flagged_task_mulin_intr (unexpected data phase)", stat);
}
nsect = (rq->current_nr_sectors > msect) ? msect : rq->current_nr_sectors;
pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
DTF("Multiread: %p, nsect: %d , rq->current_nr_sectors: %ld\n",
pBuf, nsect, rq->current_nr_sectors);
taskfile_input_data(drive, pBuf, nsect * SECTOR_WORDS);
rq->current_nr_sectors -= nsect;
if (rq->current_nr_sectors != 0) {
/*
* (ks) We don't know which command was executed.
* So, we wait the 'WORSTCASE' value.
*/
ide_set_handler(drive, &flagged_task_mulin_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
/*
* (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);
ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
return ide_stopped;
}
/*
* Pre handler for command with PIO data-out phase
*/
ide_startstop_t flagged_pre_task_out_intr (ide_drive_t *drive, struct request *rq)
{
ide_startstop_t startstop;
if (ide_wait_stat(&startstop, drive, DATA_READY,
BAD_W_STAT, WAIT_DRQ)) {
printk(KERN_ERR "%s: No DRQ bit after issuing write command.\n", drive->name);
return startstop;
}
taskfile_output_data(drive, rq->buffer, SECTOR_WORDS);
--rq->current_nr_sectors;
return ide_started;
}
ide_startstop_t flagged_task_out_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;
if (!OK_STAT(stat, DRIVE_READY, BAD_W_STAT))
return DRIVER(drive)->error(drive, "flagged_task_out_intr", stat);
if (!rq->current_nr_sectors) {
ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
return ide_stopped;
}
if (!OK_STAT(stat, DATA_READY, BAD_W_STAT)) {
/*
* (ks) Unexpected ATA data phase detected.
* This should not happen. But, it can !
* I am not sure, which function is best to clean up
* this situation. I choose: ide_error(...)
*/
return DRIVER(drive)->error(drive, "flagged_task_out_intr (unexpected data phase)", stat);
}
pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
DTF("Write - rq->current_nr_sectors: %d, status: %02x\n",
(int) rq->current_nr_sectors, stat);
taskfile_output_data(drive, pBuf, SECTOR_WORDS);
--rq->current_nr_sectors;
/*
* (ks) We don't know which command was executed.
* So, we wait the 'WORSTCASE' value.
*/
ide_set_handler(drive, &flagged_task_out_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
ide_startstop_t flagged_pre_task_mulout_intr (ide_drive_t *drive, struct request *rq)
{
ide_hwif_t *hwif = HWIF(drive);
u8 stat = hwif->INB(IDE_STATUS_REG);
char *pBuf = NULL;
ide_startstop_t startstop;
unsigned int msect, nsect;
msect = drive->mult_count;
if (msect == 0)
return DRIVER(drive)->error(drive, "flagged_pre_task_mulout_intr (multimode not set)", stat);
if (ide_wait_stat(&startstop, drive, DATA_READY,
BAD_W_STAT, WAIT_DRQ)) {
printk(KERN_ERR "%s: No DRQ bit after issuing write command.\n", drive->name);
return startstop;
}
nsect = (rq->current_nr_sectors > msect) ? msect : rq->current_nr_sectors;
pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
DTF("Multiwrite: %p, nsect: %d , rq->current_nr_sectors: %ld\n",
pBuf, nsect, rq->current_nr_sectors);
taskfile_output_data(drive, pBuf, nsect * SECTOR_WORDS);
rq->current_nr_sectors -= nsect;
return ide_started;
}
ide_startstop_t flagged_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;
unsigned int msect, nsect;
msect = drive->mult_count;
if (msect == 0)
return DRIVER(drive)->error(drive, "flagged_task_mulout_intr (multimode not set)", stat);
if (!OK_STAT(stat, DRIVE_READY, BAD_W_STAT))
return DRIVER(drive)->error(drive, "flagged_task_mulout_intr", stat);
if (!rq->current_nr_sectors) {
ide_end_drive_cmd (drive, stat, hwif->INB(IDE_ERROR_REG));
return ide_stopped;
}
if (!OK_STAT(stat, DATA_READY, BAD_W_STAT)) {
/*
* (ks) Unexpected ATA data phase detected.
* This should not happen. But, it can !
* I am not sure, which function is best to clean up
* this situation. I choose: ide_error(...)
*/
return DRIVER(drive)->error(drive, "flagged_task_mulout_intr (unexpected data phase)", stat);
}
nsect = (rq->current_nr_sectors > msect) ? msect : rq->current_nr_sectors;
pBuf = rq->buffer + ((rq->nr_sectors - rq->current_nr_sectors) * SECTOR_SIZE);
DTF("Multiwrite: %p, nsect: %d , rq->current_nr_sectors: %ld\n",
pBuf, nsect, rq->current_nr_sectors);
taskfile_output_data(drive, pBuf, nsect * SECTOR_WORDS);
rq->current_nr_sectors -= nsect;
/*
* (ks) We don't know which command was executed.
* So, we wait the 'WORSTCASE' value.
*/
ide_set_handler(drive, &flagged_task_mulout_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
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