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Commit 0c5c55d1 authored by Jens Axboe's avatar Jens Axboe
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ide-dma updates: 

o ide-iops changes
o driver->end_request and ide_end_request changes
o ->dmaproc() is now split into separate functions
o work on new mmio adapters
o init cleanup
parent f89f8b52
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Showing with 577 additions and 461 deletions
drivers/ide/ide-dma.c
View file @ 0c5c55d1
...@@ -70,14 +70,13 @@ ...@@ -70,14 +70,13 @@
* *
* And, yes, Intel Zappa boards really *do* use both PIIX IDE ports. * And, yes, Intel Zappa boards really *do* use both PIIX IDE ports.
* *
* check_drive_lists(ide_drive_t *drive, int good_bad)
*
* ATA-66/100 and recovery functions, I forgot the rest...... * ATA-66/100 and recovery functions, I forgot the rest......
* SELECT_READ_WRITE(hwif,drive,func) for active tuning based on IO direction.
* *
*/ */
#include <linux/config.h> #include <linux/config.h>
#define __NO_VERSION__
#include <linux/module.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/timer.h> #include <linux/timer.h>
...@@ -86,21 +85,11 @@ ...@@ -86,21 +85,11 @@
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/ide.h> #include <linux/ide.h>
#include <linux/delay.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/irq.h> #include <asm/irq.h>
/*
* Long lost data from 2.0.34 that is now in 2.0.39
*
* This was used in ./drivers/block/triton.c to do DMA Base address setup
* when PnP failed. Oh the things we forget. I believe this was part
* of SFF-8038i that has been withdrawn from public access... :-((
*/
#define DEFAULT_BMIBA 0xe800 /* in case BIOS did not init it */
#define DEFAULT_BMCRBA 0xcc00 /* VIA's default value */
#define DEFAULT_BMALIBA 0xd400 /* ALI's default value */
#ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS #ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS
struct drive_list_entry { struct drive_list_entry {
...@@ -205,19 +194,15 @@ const char *bad_dma_drives[] = {"WDC AC11000H", ...@@ -205,19 +194,15 @@ const char *bad_dma_drives[] = {"WDC AC11000H",
*/ */
ide_startstop_t ide_dma_intr (ide_drive_t *drive) ide_startstop_t ide_dma_intr (ide_drive_t *drive)
{ {
int i; u8 stat = 0, dma_stat = 0;
byte stat, dma_stat;
dma_stat = HWIF(drive)->dmaproc(ide_dma_end, drive); dma_stat = HWIF(drive)->ide_dma_end(drive);
stat = GET_STAT(); /* get drive status */ stat = HWIF(drive)->INB(IDE_STATUS_REG); /* get drive status */
if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) { if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) {
if (!dma_stat) { if (!dma_stat) {
struct request *rq = HWGROUP(drive)->rq; struct request *rq = HWGROUP(drive)->rq;
rq = HWGROUP(drive)->rq;
for (i = rq->nr_sectors; i > 0;) { DRIVER(drive)->end_request(drive, 1, rq->nr_sectors);
i -= rq->current_nr_sectors;
DRIVER(drive)->end_request(drive, 1);
}
return ide_stopped; return ide_stopped;
} }
printk("%s: dma_intr: bad DMA status (dma_stat=%x)\n", printk("%s: dma_intr: bad DMA status (dma_stat=%x)\n",
...@@ -251,7 +236,7 @@ static int ide_raw_build_sglist (ide_drive_t *drive, struct request *rq) ...@@ -251,7 +236,7 @@ static int ide_raw_build_sglist (ide_drive_t *drive, struct request *rq)
struct scatterlist *sg = hwif->sg_table; struct scatterlist *sg = hwif->sg_table;
int nents = 0; int nents = 0;
ide_task_t *args = rq->special; ide_task_t *args = rq->special;
unsigned char *virt_addr = rq->buffer; u8 *virt_addr = rq->buffer;
int sector_count = rq->nr_sectors; int sector_count = rq->nr_sectors;
if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
...@@ -297,27 +282,24 @@ static int ide_raw_build_sglist (ide_drive_t *drive, struct request *rq) ...@@ -297,27 +282,24 @@ static int ide_raw_build_sglist (ide_drive_t *drive, struct request *rq)
* Returns 0 if all went okay, returns 1 otherwise. * Returns 0 if all went okay, returns 1 otherwise.
* May also be invoked from trm290.c * May also be invoked from trm290.c
*/ */
int ide_build_dmatable (ide_drive_t *drive, ide_dma_action_t func) int ide_build_dmatable (ide_drive_t *drive, struct request *rq)
{ {
unsigned int *table = HWIF(drive)->dmatable_cpu; ide_hwif_t *hwif = HWIF(drive);
#ifdef CONFIG_BLK_DEV_TRM290 unsigned int *table = hwif->dmatable_cpu;
unsigned int is_trm290_chipset = (HWIF(drive)->chipset == ide_trm290); unsigned int is_trm290 = (hwif->chipset == ide_trm290) ? 1 : 0;
#else
const int is_trm290_chipset = 0;
#endif
unsigned int count = 0; unsigned int count = 0;
int i; int i;
struct scatterlist *sg; struct scatterlist *sg;
if (HWGROUP(drive)->rq->flags & REQ_DRIVE_TASKFILE) if (HWGROUP(drive)->rq->flags & REQ_DRIVE_TASKFILE)
HWIF(drive)->sg_nents = i = ide_raw_build_sglist(drive, HWGROUP(drive)->rq); hwif->sg_nents = i = ide_raw_build_sglist(drive, rq);
else else
HWIF(drive)->sg_nents = i = ide_build_sglist(drive, HWGROUP(drive)->rq); hwif->sg_nents = i = ide_build_sglist(drive, rq);
if (!i) if (!i)
return 0; return 0;
sg = HWIF(drive)->sg_table; sg = hwif->sg_table;
while (i) { while (i) {
u32 cur_addr; u32 cur_addr;
u32 cur_len; u32 cur_len;
...@@ -342,14 +324,14 @@ int ide_build_dmatable (ide_drive_t *drive, ide_dma_action_t func) ...@@ -342,14 +324,14 @@ int ide_build_dmatable (ide_drive_t *drive, ide_dma_action_t func)
bcount = cur_len; bcount = cur_len;
*table++ = cpu_to_le32(cur_addr); *table++ = cpu_to_le32(cur_addr);
xcount = bcount & 0xffff; xcount = bcount & 0xffff;
if (is_trm290_chipset) if (is_trm290)
xcount = ((xcount >> 2) - 1) << 16; xcount = ((xcount >> 2) - 1) << 16;
if (xcount == 0x0000) { if (xcount == 0x0000) {
/* /*
* Most chipsets correctly interpret a length of 0x0000 as 64KB, * Most chipsets correctly interpret a length of 0x0000 as 64KB,
* but at least one (e.g. CS5530) misinterprets it as zero (!). * but at least one (e.g. CS5530) misinterprets it as zero (!).
* So here we break the 64KB entry into two 32KB entries instead. * So here we break the 64KB entry into two 32KB entries instead.
*/ */
if (count++ >= PRD_ENTRIES) { if (count++ >= PRD_ENTRIES) {
printk("%s: DMA table too small\n", drive->name); printk("%s: DMA table too small\n", drive->name);
goto use_pio_instead; goto use_pio_instead;
...@@ -369,17 +351,17 @@ int ide_build_dmatable (ide_drive_t *drive, ide_dma_action_t func) ...@@ -369,17 +351,17 @@ int ide_build_dmatable (ide_drive_t *drive, ide_dma_action_t func)
} }
if (count) { if (count) {
if (!is_trm290_chipset) if (!is_trm290)
*--table |= cpu_to_le32(0x80000000); *--table |= cpu_to_le32(0x80000000);
return count; return count;
} }
printk("%s: empty DMA table?\n", drive->name); printk("%s: empty DMA table?\n", drive->name);
use_pio_instead: use_pio_instead:
pci_unmap_sg(HWIF(drive)->pci_dev, pci_unmap_sg(hwif->pci_dev,
HWIF(drive)->sg_table, hwif->sg_table,
HWIF(drive)->sg_nents, hwif->sg_nents,
HWIF(drive)->sg_dma_direction); hwif->sg_dma_direction);
HWIF(drive)->sg_dma_active = 0; hwif->sg_dma_active = 0;
return 0; /* revert to PIO for this request */ return 0; /* revert to PIO for this request */
} }
...@@ -394,86 +376,6 @@ void ide_destroy_dmatable (ide_drive_t *drive) ...@@ -394,86 +376,6 @@ void ide_destroy_dmatable (ide_drive_t *drive)
HWIF(drive)->sg_dma_active = 0; HWIF(drive)->sg_dma_active = 0;
} }
/*
* For both Blacklisted and Whitelisted drives.
* This is setup to be called as an extern for future support
* to other special driver code.
*/
int check_drive_lists (ide_drive_t *drive, int good_bad)
{
struct hd_driveid *id = drive->id;
#ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS
if (good_bad) {
return in_drive_list(id, drive_whitelist);
} else {
int blacklist = in_drive_list(id, drive_blacklist);
if (blacklist)
printk("%s: Disabling (U)DMA for %s\n", drive->name, id->model);
return(blacklist);
}
#else /* !CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */
const char **list;
if (good_bad) {
/* Consult the list of known "good" drives */
list = good_dma_drives;
while (*list) {
if (!strcmp(*list++,id->model))
return 1;
}
} else {
/* Consult the list of known "bad" drives */
list = bad_dma_drives;
while (*list) {
if (!strcmp(*list++,id->model)) {
printk("%s: Disabling (U)DMA for %s\n",
drive->name, id->model);
return 1;
}
}
}
#endif /* CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */
return 0;
}
int report_drive_dmaing (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
if ((id->field_valid & 4) && (eighty_ninty_three(drive)) &&
(id->dma_ultra & (id->dma_ultra >> 14) & 3)) {
if ((id->dma_ultra >> 15) & 1) {
printk(", UDMA(mode 7)"); /* UDMA BIOS-enabled! */
} else {
printk(", UDMA(133)"); /* UDMA BIOS-enabled! */
}
} else if ((id->field_valid & 4) && (eighty_ninty_three(drive)) &&
(id->dma_ultra & (id->dma_ultra >> 11) & 7)) {
if ((id->dma_ultra >> 13) & 1) {
printk(", UDMA(100)"); /* UDMA BIOS-enabled! */
} else if ((id->dma_ultra >> 12) & 1) {
printk(", UDMA(66)"); /* UDMA BIOS-enabled! */
} else {
printk(", UDMA(44)"); /* UDMA BIOS-enabled! */
}
} else if ((id->field_valid & 4) &&
(id->dma_ultra & (id->dma_ultra >> 8) & 7)) {
if ((id->dma_ultra >> 10) & 1) {
printk(", UDMA(33)"); /* UDMA BIOS-enabled! */
} else if ((id->dma_ultra >> 9) & 1) {
printk(", UDMA(25)"); /* UDMA BIOS-enabled! */
} else {
printk(", UDMA(16)"); /* UDMA BIOS-enabled! */
}
} else if (id->field_valid & 4) {
printk(", (U)DMA"); /* Can be BIOS-enabled! */
} else {
printk(", DMA");
}
return 1;
}
static int config_drive_for_dma (ide_drive_t *drive) static int config_drive_for_dma (ide_drive_t *drive)
{ {
struct hd_driveid *id = drive->id; struct hd_driveid *id = drive->id;
...@@ -481,102 +383,67 @@ static int config_drive_for_dma (ide_drive_t *drive) ...@@ -481,102 +383,67 @@ static int config_drive_for_dma (ide_drive_t *drive)
if (id && (id->capability & 1) && hwif->autodma) { if (id && (id->capability & 1) && hwif->autodma) {
/* Consult the list of known "bad" drives */ /* Consult the list of known "bad" drives */
if (ide_dmaproc(ide_dma_bad_drive, drive)) if (hwif->ide_dma_bad_drive(drive))
return hwif->dmaproc(ide_dma_off, drive); return hwif->ide_dma_off(drive);
/* Enable DMA on any drive that has UltraDMA (mode 6/7/?) enabled */ /*
if ((id->field_valid & 4) && (eighty_ninty_three(drive))) * Enable DMA on any drive that has
if ((id->dma_ultra & (id->dma_ultra >> 14) & 2)) * UltraDMA (mode 0/1/2/3/4/5/6) enabled
return hwif->dmaproc(ide_dma_on, drive); */
/* Enable DMA on any drive that has UltraDMA (mode 3/4/5) enabled */ if ((id->field_valid & 4) && ((id->dma_ultra >> 8) & 0x7f))
if ((id->field_valid & 4) && (eighty_ninty_three(drive))) return hwif->ide_dma_on(drive);
if ((id->dma_ultra & (id->dma_ultra >> 11) & 7)) /*
return hwif->dmaproc(ide_dma_on, drive); * Enable DMA on any drive that has mode2 DMA
/* Enable DMA on any drive that has UltraDMA (mode 0/1/2) enabled */ * (multi or single) enabled
if (id->field_valid & 4) /* UltraDMA */ */
if ((id->dma_ultra & (id->dma_ultra >> 8) & 7))
return hwif->dmaproc(ide_dma_on, drive);
/* Enable DMA on any drive that has mode2 DMA (multi or single) enabled */
if (id->field_valid & 2) /* regular DMA */ if (id->field_valid & 2) /* regular DMA */
if ((id->dma_mword & 0x404) == 0x404 || (id->dma_1word & 0x404) == 0x404) if ((id->dma_mword & 0x404) == 0x404 ||
return hwif->dmaproc(ide_dma_on, drive); (id->dma_1word & 0x404) == 0x404)
return hwif->ide_dma_on(drive);
/* Consult the list of known "good" drives */ /* Consult the list of known "good" drives */
if (ide_dmaproc(ide_dma_good_drive, drive)) if (hwif->ide_dma_good_drive(drive))
return hwif->dmaproc(ide_dma_on, drive); return hwif->ide_dma_on(drive);
} }
return hwif->dmaproc(ide_dma_off_quietly, drive); // if (hwif->tuneproc != NULL) hwif->tuneproc(drive, 255);
return hwif->ide_dma_off_quietly(drive);
} }
#ifndef __IDEDMA_TIMEOUT
/* /*
* 1 dmaing, 2 error, 4 intr * 1 dmaing, 2 error, 4 intr
*/ */
static int dma_timer_expiry (ide_drive_t *drive) static int dma_timer_expiry (ide_drive_t *drive)
{ {
byte dma_stat = IN_BYTE(HWIF(drive)->dma_base+2); ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat = hwif->INB(hwif->dma_status);
#ifdef DEBUG printk("%s: dma_timer_expiry: dma status == 0x%02x\n",
printk("%s: dma_timer_expiry: dma status == 0x%02x\n", drive->name, dma_stat); drive->name, dma_stat);
#endif /* DEBUG */
if ((dma_stat & 0x18) == 0x18) /* BUSY Stupid Early Timer !! */
return WAIT_CMD;
#if 0
HWGROUP(drive)->expiry = NULL; /* one free ride for now */ HWGROUP(drive)->expiry = NULL; /* one free ride for now */
#endif
if (dma_stat & 2) { /* ERROR */ if (dma_stat & 2) { /* ERROR */
byte stat = GET_STAT(); (void) hwif->ide_dma_end(drive);
return DRIVER(drive)->error(drive, "dma_timer_expiry", stat); return DRIVER(drive)->error(drive,
"dma_timer_expiry", hwif->INB(IDE_STATUS_REG));
} }
if (dma_stat & 1) /* DMAing */ if (dma_stat & 1) /* DMAing */
return WAIT_CMD; return WAIT_CMD;
return 0;
}
#else /* __IDEDMA_TIMEOUT */
static int ide_dma_timeout_recovery (ide_drive_t *drive)
{
struct request *rq = HWGROUP(drive)->rq;
int enable_dma = drive->using_dma;
int speed = drive->current_speed;
unsigned long flags;
spin_lock_irqsave(&ide_lock, flags);
HWGROUP(drive)->handler = NULL;
del_timer(&HWGROUP(drive)->timer);
HWGROUP(drive)->expiry = NULL;
HWGROUP(drive)->rq = NULL;
spin_unlock_irqrestore(&ide_lock, flags);
(void) HWIF(drive)->dmaproc(ide_dma_off, drive);
drive->waiting_for_dma = 0;
(void) ide_do_reset(drive); if (dma_stat & 4) /* Got an Interrupt */
HWGROUP(drive)->handler(drive);
if (!(drive_is_ready(drive))) { return 0;
/* FIXME: Replace hard-coded 100, error handling? */
int i;
for (i=0; i<100; i++) {
if (drive_is_ready(drive))
break;
}
}
if ((HWIF(drive)->speedproc) != NULL) {
HWIF(drive)->speedproc(drive, speed);
drive->current_speed = speed;
}
if ((enable_dma) && !(drive->using_dma))
(void) HWIF(drive)->dmaproc(ide_dma_on, drive);
return restart_request(drive, rq);
} }
#endif /* __IDEDMA_TIMEOUT */
static void ide_toggle_bounce(ide_drive_t *drive, int on) static void ide_toggle_bounce(ide_drive_t *drive, int on)
{ {
u64 addr = BLK_BOUNCE_HIGH; u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */
if (on && drive->media == ide_disk && !HWIF(drive)->no_highmem) { if (on && drive->media == ide_disk) {
if (!PCI_DMA_BUS_IS_PHYS) if (!PCI_DMA_BUS_IS_PHYS)
addr = BLK_BOUNCE_ANY; addr = BLK_BOUNCE_ANY;
else else
...@@ -586,186 +453,373 @@ static void ide_toggle_bounce(ide_drive_t *drive, int on) ...@@ -586,186 +453,373 @@ static void ide_toggle_bounce(ide_drive_t *drive, int on)
blk_queue_bounce_limit(&drive->queue, addr); blk_queue_bounce_limit(&drive->queue, addr);
} }
/* int __ide_dma_host_off (ide_drive_t *drive)
* ide_dmaproc() initiates/aborts DMA read/write operations on a drive. {
* ide_hwif_t *hwif = HWIF(drive);
* The caller is assumed to have selected the drive and programmed the drive's u8 unit = (drive->select.b.unit & 0x01);
* sector address using CHS or LBA. All that remains is to prepare for DMA u8 dma_stat = hwif->INB(hwif->dma_status);
* and then issue the actual read/write DMA/PIO command to the drive.
* hwif->OUTB((dma_stat & ~(1<<(5+unit))), hwif->dma_status);
* For ATAPI devices, we just prepare for DMA and return. The caller should return 0;
* then issue the packet command to the drive and call us again with }
* ide_dma_begin afterwards.
* EXPORT_SYMBOL(__ide_dma_host_off);
* Returns 0 if all went well.
* Returns 1 if DMA read/write could not be started, in which case int __ide_dma_off_quietly (ide_drive_t *drive)
* the caller should revert to PIO for the current request. {
* May also be invoked from trm290.c drive->using_dma = 0;
*/ ide_toggle_bounce(drive, 0);
int ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive) return HWIF(drive)->ide_dma_host_off(drive);
{ }
ide_hwif_t *hwif = HWIF(drive);
// ide_task_t *args = HWGROUP(drive)->rq->special; EXPORT_SYMBOL(__ide_dma_off_quietly);
unsigned long dma_base = hwif->dma_base;
byte unit = (drive->select.b.unit & 0x01); int __ide_dma_off (ide_drive_t *drive)
unsigned int count, reading = 0; {
unsigned int set_high = 1; printk("%s: DMA disabled\n", drive->name);
byte dma_stat; return HWIF(drive)->ide_dma_off_quietly(drive);
}
switch (func) {
case ide_dma_off: EXPORT_SYMBOL(__ide_dma_off);
printk("%s: DMA disabled\n", drive->name);
case ide_dma_off_quietly: int __ide_dma_host_on (ide_drive_t *drive)
case ide_dma_host_off: {
OUT_BYTE(IN_BYTE(dma_base+2) & ~(1<<(5+unit)), dma_base+2); if (drive->using_dma) {
if (func == ide_dma_host_off) ide_hwif_t *hwif = HWIF(drive);
return 0; u8 unit = (drive->select.b.unit & 0x01);
set_high = 0; u8 dma_stat = hwif->INB(hwif->dma_status);
case ide_dma_on:
drive->using_dma = (func == ide_dma_on); hwif->OUTB((dma_stat|(1<<(5+unit))), hwif->dma_status);
if (!drive->using_dma) return 0;
return 0; }
case ide_dma_host_on: return 1;
if (drive->using_dma) }
OUT_BYTE(IN_BYTE(dma_base+2)|(1<<(5+unit)), dma_base+2);
ide_toggle_bounce(drive, set_high); EXPORT_SYMBOL(__ide_dma_host_on);
return 0;
case ide_dma_check: int __ide_dma_on (ide_drive_t *drive)
return config_drive_for_dma (drive); {
case ide_dma_read: drive->using_dma = 1;
reading = 1 << 3; ide_toggle_bounce(drive, 1);
case ide_dma_write: return HWIF(drive)->ide_dma_host_on(drive);
SELECT_READ_WRITE(hwif,drive,func); }
if (!(count = ide_build_dmatable(drive, func)))
/* try PIO instead of DMA */ EXPORT_SYMBOL(__ide_dma_on);
return 1;
/* PRD table */ int __ide_dma_check (ide_drive_t *drive)
outl(hwif->dmatable_dma, dma_base + 4); {
/* specify r/w */ return config_drive_for_dma(drive);
OUT_BYTE(reading, dma_base); }
/* clear INTR & ERROR flags */
OUT_BYTE(IN_BYTE(dma_base+2)|6, dma_base+2); EXPORT_SYMBOL(__ide_dma_check);
drive->waiting_for_dma = 1;
if (drive->media != ide_disk) int __ide_dma_read (ide_drive_t *drive /*, struct request *rq */)
return 0; {
/* paranoia check */ ide_hwif_t *hwif = HWIF(drive);
if (HWGROUP(drive)->handler != NULL) struct request *rq = HWGROUP(drive)->rq;
BUG(); // ide_task_t *args = rq->special;
#ifndef __IDEDMA_TIMEOUT unsigned int reading = 1 << 3;
ide_set_handler(drive, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry); unsigned int count = 0;
#else /* __IDEDMA_TIMEOUT */ u8 dma_stat = 0, lba48 = (drive->addressing == 1) ? 1 : 0;
ide_set_handler(drive, &ide_dma_intr, 2*WAIT_CMD, NULL); task_ioreg_t command = WIN_NOP;
#endif /* __IDEDMA_TIMEOUT */
/* issue cmd to drive */ if (!(count = ide_build_dmatable(drive, rq)))
/* /* try PIO instead of DMA */
* FIX ME to use only ACB ide_task_t args Struct return 1;
*/ /* PRD table */
hwif->OUTL(hwif->dmatable_dma, hwif->dma_prdtable);
/* specify r/w */
hwif->OUTB(reading, hwif->dma_command);
/* read dma_status for INTR & ERROR flags */
dma_stat = hwif->INB(hwif->dma_status);
/* clear INTR & ERROR flags */
hwif->OUTB(dma_stat|6, hwif->dma_status);
drive->waiting_for_dma = 1;
if (drive->media != ide_disk)
return 0;
/* paranoia check */
if (HWGROUP(drive)->handler != NULL)
BUG();
ide_set_handler(drive, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
/*
* FIX ME to use only ACB ide_task_t args Struct
*/
#if 0 #if 0
{ {
ide_task_t *args = HWGROUP(drive)->rq->special; ide_task_t *args = rq->special;
OUT_BYTE(args->tfRegister[IDE_COMMAND_OFFSET], IDE_COMMAND_REG); command = args->tfRegister[IDE_COMMAND_OFFSET];
} }
#else #else
if (HWGROUP(drive)->rq->flags & REQ_DRIVE_TASKFILE) { command = (lba48) ? WIN_READDMA_EXT : WIN_READDMA;
ide_task_t *args = HWGROUP(drive)->rq->special; if (rq->flags & REQ_DRIVE_TASKFILE) {
OUT_BYTE(args->tfRegister[IDE_COMMAND_OFFSET], IDE_COMMAND_REG); ide_task_t *args = rq->special;
} else if (drive->addressing == 1) command = args->tfRegister[IDE_COMMAND_OFFSET];
OUT_BYTE(reading ? WIN_READDMA_EXT : WIN_WRITEDMA_EXT, IDE_COMMAND_REG); }
else
OUT_BYTE(reading ? WIN_READDMA : WIN_WRITEDMA, IDE_COMMAND_REG);
#endif
return HWIF(drive)->dmaproc(ide_dma_begin, drive);
case ide_dma_begin:
/* Note that this is done *after* the cmd has
* been issued to the drive, as per the BM-IDE spec.
* The Promise Ultra33 doesn't work correctly when
* we do this part before issuing the drive cmd.
*/
/* start DMA */
OUT_BYTE(IN_BYTE(dma_base)|1, dma_base);
return 0;
case ide_dma_end: /* returns 1 on error, 0 otherwise */
drive->waiting_for_dma = 0;
/* stop DMA */
OUT_BYTE(IN_BYTE(dma_base)&~1, dma_base);
/* get DMA status */
dma_stat = IN_BYTE(dma_base+2);
/* clear the INTR & ERROR bits */
OUT_BYTE(dma_stat|6, dma_base+2);
/* purge DMA mappings */
ide_destroy_dmatable(drive);
/* verify good DMA status */
return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
case ide_dma_test_irq: /* returns 1 if dma irq issued, 0 otherwise */
dma_stat = IN_BYTE(dma_base+2);
#if 0 /* do not set unless you know what you are doing */
if (dma_stat & 4) {
byte stat = GET_STAT();
OUT_BYTE(dma_base+2, dma_stat & 0xE4);
}
#endif #endif
/* return 1 if INTR asserted */ /* issue cmd to drive */
return (dma_stat & 4) == 4; hwif->OUTB(command, IDE_COMMAND_REG);
case ide_dma_bad_drive:
case ide_dma_good_drive: return HWIF(drive)->ide_dma_count(drive);
return check_drive_lists(drive, (func == ide_dma_good_drive)); }
case ide_dma_verbose:
return report_drive_dmaing(drive); EXPORT_SYMBOL(__ide_dma_read);
case ide_dma_timeout:
// FIXME: Many IDE chipsets do not permit command file register access int __ide_dma_write (ide_drive_t *drive /*, struct request *rq */)
// FIXME: while the bus-master function is still active. {
// FIXME: To prevent deadlock with those chipsets, we must be extremely ide_hwif_t *hwif = HWIF(drive);
// FIXME: careful here (and in ide_intr() as well) to NOT access any struct request *rq = HWGROUP(drive)->rq;
// FIXME: registers from the 0x1Fx/0x17x sets before terminating the // ide_task_t *args = rq->special;
// FIXME: bus-master operation via the bus-master control reg. unsigned int reading = 0;
// FIXME: Otherwise, chipset deadlock will occur, and some systems will unsigned int count = 0;
// FIXME: lock up completely!! u8 dma_stat = 0, lba48 = (drive->addressing == 1) ? 1 : 0;
#ifdef __IDEDMA_TIMEOUT task_ioreg_t command = WIN_NOP;
/*
* Have to issue an abort and requeue the request if (!(count = ide_build_dmatable(drive, rq)))
* DMA engine got turned off by a goofy ASIC, and /* try PIO instead of DMA */
* we have to clean up the mess, and here is as good return 1;
* as any. Do it globally for all chipsets. /* PRD table */
*/ hwif->OUTL(hwif->dmatable_dma, hwif->dma_prdtable);
/* specify r/w */
hwif->OUTB(reading, hwif->dma_command);
/* read dma_status for INTR & ERROR flags */
dma_stat = hwif->INB(hwif->dma_status);
/* clear INTR & ERROR flags */
hwif->OUTB(dma_stat|6, hwif->dma_status);
drive->waiting_for_dma = 1;
if (drive->media != ide_disk)
return 0;
/* paranoia check */
if (HWGROUP(drive)->handler != NULL)
BUG();
ide_set_handler(drive, &ide_dma_intr, 2*WAIT_CMD, dma_timer_expiry);
/*
* FIX ME to use only ACB ide_task_t args Struct
*/
#if 0 #if 0
dma_stat = HWIF(drive)->dmaproc(ide_dma_end, drive); {
ide_task_t *args = rq->special;
command = args->tfRegister[IDE_COMMAND_OFFSET];
}
#else #else
drive->waiting_for_dma = 0; command = (lba48) ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
/* stop DMA */ if (rq->flags & REQ_DRIVE_TASKFILE) {
OUT_BYTE(IN_BYTE(dma_base)&~1, dma_base); ide_task_t *args = rq->special;
// OUT_BYTE(0x00, dma_base); command = args->tfRegister[IDE_COMMAND_OFFSET];
/* get DMA status */ }
dma_stat = IN_BYTE(dma_base+2);
/* clear the INTR & ERROR bits */
OUT_BYTE(dma_stat|6, dma_base+2);
/* purge DMA mappings */
ide_destroy_dmatable(drive);
#endif #endif
printk("%s: %s: Lets do it again!" \ /* issue cmd to drive */
"stat = 0x%02x, dma_stat = 0x%02x\n", hwif->OUTB(command, IDE_COMMAND_REG);
drive->name, ide_dmafunc_verbose(func), return HWIF(drive)->ide_dma_count(drive);
GET_STAT(), dma_stat); }
if (dma_stat & 0xF0) EXPORT_SYMBOL(__ide_dma_write);
return ide_dma_timeout_recovery(drive);
#endif /* __IDEDMA_TIMEOUT */ int __ide_dma_begin (ide_drive_t *drive)
case ide_dma_retune: {
case ide_dma_lostirq: ide_hwif_t *hwif = HWIF(drive);
printk("ide_dmaproc: chipset supported %s " u8 dma_cmd = hwif->INB(hwif->dma_command);
"func only: %d\n",
ide_dmafunc_verbose(func), func); /* Note that this is done *after* the cmd has
* been issued to the drive, as per the BM-IDE spec.
* The Promise Ultra33 doesn't work correctly when
* we do this part before issuing the drive cmd.
*/
/* start DMA */
hwif->OUTB(dma_cmd|1, hwif->dma_command);
return 0;
}
EXPORT_SYMBOL(__ide_dma_begin);
/* returns 1 on error, 0 otherwise */
int __ide_dma_end (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat = 0, dma_cmd = 0;
drive->waiting_for_dma = 0;
/* get dma_command mode */
dma_cmd = hwif->INB(hwif->dma_command);
/* stop DMA */
hwif->OUTB(dma_cmd&~1, hwif->dma_command);
/* get DMA status */
dma_stat = hwif->INB(hwif->dma_status);
/* clear the INTR & ERROR bits */
hwif->OUTB(dma_stat|6, hwif->dma_status);
/* purge DMA mappings */
ide_destroy_dmatable(drive);
/* verify good DMA status */
return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
}
EXPORT_SYMBOL(__ide_dma_end);
/* returns 1 if dma irq issued, 0 otherwise */
int __ide_dma_test_irq (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat = hwif->INB(hwif->dma_status);
#if 0 /* do not set unless you know what you are doing */
if (dma_stat & 4) {
u8 stat = hwif->INB(IDE_STATUS_REG);
hwif->OUTB(hwif->dma_status, dma_stat & 0xE4);
}
#endif
/* return 1 if INTR asserted */
if ((dma_stat & 4) == 4)
return 1;
if (!drive->waiting_for_dma)
printk(KERN_WARNING "%s: (%s) called while not waiting\n",
drive->name, __FUNCTION__);
drive->waiting_for_dma++;
return 0;
}
EXPORT_SYMBOL(__ide_dma_test_irq);
int __ide_dma_bad_drive (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
#ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS
int blacklist = in_drive_list(id, drive_blacklist);
if (blacklist) {
printk("%s: Disabling (U)DMA for %s\n", drive->name, id->model);
return(blacklist);
}
#else /* !CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */
const char **list;
/* Consult the list of known "bad" drives */
list = bad_dma_drives;
while (*list) {
if (!strcmp(*list++,id->model)) {
printk("%s: Disabling (U)DMA for %s\n",
drive->name, id->model);
return 1; return 1;
default: }
printk("ide_dmaproc: unsupported %s func: %d\n", }
ide_dmafunc_verbose(func), func); #endif /* CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */
return 0;
}
EXPORT_SYMBOL(__ide_dma_bad_drive);
int __ide_dma_good_drive (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
#ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS
return in_drive_list(id, drive_whitelist);
#else /* !CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */
const char **list;
/* Consult the list of known "good" drives */
list = good_dma_drives;
while (*list) {
if (!strcmp(*list++,id->model))
return 1; return 1;
} }
#endif /* CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */
return 0;
}
EXPORT_SYMBOL(__ide_dma_good_drive);
/*
* Used for HOST FIFO counters for VDMA
* PIO over DMA, effective ATA-Bridge operator.
*/
int __ide_dma_count (ide_drive_t *drive)
{
return HWIF(drive)->ide_dma_begin(drive);
}
EXPORT_SYMBOL(__ide_dma_count);
int __ide_dma_verbose (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
ide_hwif_t *hwif = HWIF(drive);
if (id->field_valid & 4) {
if ((id->dma_ultra >> 8) && (id->dma_mword >> 8)) {
printk(", BUG DMA OFF");
return hwif->ide_dma_off_quietly(drive);
}
if (id->dma_ultra & ((id->dma_ultra >> 8) & hwif->ultra_mask)) {
if (((id->dma_ultra >> 11) & 0x1F) &&
eighty_ninty_three(drive)) {
if ((id->dma_ultra >> 15) & 1) {
printk(", UDMA(mode 7)");
} else if ((id->dma_ultra >> 14) & 1) {
printk(", UDMA(133)");
} else if ((id->dma_ultra >> 13) & 1) {
printk(", UDMA(100)");
} else if ((id->dma_ultra >> 12) & 1) {
printk(", UDMA(66)");
} else if ((id->dma_ultra >> 11) & 1) {
printk(", UDMA(44)");
} else
goto mode_two;
} else {
mode_two:
if ((id->dma_ultra >> 10) & 1) {
printk(", UDMA(33)");
} else if ((id->dma_ultra >> 9) & 1) {
printk(", UDMA(25)");
} else if ((id->dma_ultra >> 8) & 1) {
printk(", UDMA(16)");
}
}
} else {
printk(", (U)DMA"); /* Can be BIOS-enabled! */
}
} else if (id->field_valid & 2) {
if ((id->dma_mword >> 8) && (id->dma_1word >> 8)) {
printk(", BUG DMA OFF");
return hwif->ide_dma_off_quietly(drive);
}
printk(", DMA");
} else if (id->field_valid & 1) {
printk(", BUG");
}
return 1;
} }
EXPORT_SYMBOL(__ide_dma_verbose);
int __ide_dma_retune (ide_drive_t *drive)
{
printk("%s: chipset supported call only\n", __FUNCTION__);
return 1;
}
EXPORT_SYMBOL(__ide_dma_retune);
int __ide_dma_lostirq (ide_drive_t *drive)
{
printk("%s: DMA interrupt recovery\n", drive->name);
return 1;
}
EXPORT_SYMBOL(__ide_dma_lostirq);
int __ide_dma_timeout (ide_drive_t *drive)
{
printk("%s: timeout waiting for DMA\n", drive->name);
if (HWIF(drive)->ide_dma_test_irq(drive))
return 0;
return HWIF(drive)->ide_dma_end(drive);
}
EXPORT_SYMBOL(__ide_dma_timeout);
/* /*
* Needed for allowing full modular support of ide-driver * Needed for allowing full modular support of ide-driver
*/ */
int ide_release_dma (ide_hwif_t *hwif) int ide_release_dma_engine (ide_hwif_t *hwif)
{ {
if (hwif->dmatable_cpu) { if (hwif->dmatable_cpu) {
pci_free_consistent(hwif->pci_dev, pci_free_consistent(hwif->pci_dev,
...@@ -778,129 +832,191 @@ int ide_release_dma (ide_hwif_t *hwif) ...@@ -778,129 +832,191 @@ int ide_release_dma (ide_hwif_t *hwif)
kfree(hwif->sg_table); kfree(hwif->sg_table);
hwif->sg_table = NULL; hwif->sg_table = NULL;
} }
return 1;
}
int ide_release_mmio_dma (ide_hwif_t *hwif)
{
if ((hwif->dma_extra) && (hwif->channel == 0))
release_mem_region((hwif->dma_base + 16), hwif->dma_extra);
release_mem_region(hwif->dma_base, 8);
if (hwif->dma_base2)
release_mem_region(hwif->dma_base, 8);
return 1;
}
int ide_release_iomio_dma (ide_hwif_t *hwif)
{
if ((hwif->dma_extra) && (hwif->channel == 0)) if ((hwif->dma_extra) && (hwif->channel == 0))
release_region((hwif->dma_base + 16), hwif->dma_extra); release_region((hwif->dma_base + 16), hwif->dma_extra);
release_region(hwif->dma_base, 8); release_region(hwif->dma_base, 8);
if (hwif->dma_base2)
release_region(hwif->dma_base, 8);
return 1; return 1;
} }
/* /*
* This can be called for a dynamically installed interface. Don't __init it * Needed for allowing full modular support of ide-driver
*/ */
int ide_release_dma (ide_hwif_t *hwif)
void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_ports) {
if (hwif->chipset == ide_etrax100)
return 1;
ide_release_dma_engine(hwif);
if (hwif->mmio)
return ide_release_mmio_dma(hwif);
return ide_release_iomio_dma(hwif);
}
int ide_allocate_dma_engine (ide_hwif_t *hwif)
{ {
printk(" %s: BM-DMA at 0x%04lx-0x%04lx", hwif->name, dma_base, dma_base + num_ports - 1);
if (check_region(dma_base, num_ports)) {
printk(" -- ERROR, PORT ADDRESSES ALREADY IN USE\n");
return;
}
request_region(dma_base, num_ports, hwif->name);
hwif->dma_base = dma_base;
hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev, hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
PRD_ENTRIES * PRD_BYTES, PRD_ENTRIES * PRD_BYTES,
&hwif->dmatable_dma); &hwif->dmatable_dma);
if (hwif->dmatable_cpu == NULL)
goto dma_alloc_failure;
hwif->sg_table = kmalloc(sizeof(struct scatterlist) * PRD_ENTRIES, hwif->sg_table = kmalloc(sizeof(struct scatterlist) * PRD_ENTRIES,
GFP_KERNEL); GFP_KERNEL);
if (hwif->sg_table == NULL) {
pci_free_consistent(hwif->pci_dev, PRD_ENTRIES * PRD_BYTES,
hwif->dmatable_cpu, hwif->dmatable_dma);
goto dma_alloc_failure;
}
hwif->dmaproc = &ide_dmaproc; if ((hwif->dmatable_cpu) && (hwif->sg_table))
return 0;
if (hwif->chipset != ide_trm290) { printk("%s: -- Error, unable to allocate%s%s table(s).\n",
byte dma_stat = IN_BYTE(dma_base+2); (hwif->dmatable_cpu == NULL) ? " CPU" : "",
printk(", BIOS settings: %s:%s, %s:%s", (hwif->sg_table == NULL) ? " SG DMA" : " DMA",
hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "pio", hwif->cds->name);
hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio");
ide_release_dma_engine(hwif);
return 1;
}
int ide_mmio_dma (ide_hwif_t *hwif, unsigned long base, unsigned int ports)
{
printk(" %s: MMIO-DMA at 0x%08lx-0x%08lx",
hwif->name, base, base + ports - 1);
if (check_mem_region(base, ports)) {
printk(" -- Error, MMIO ports already in use.\n");
return 1;
} }
printk("\n"); request_mem_region(base, ports, hwif->name);
return; hwif->dma_base = base;
if ((hwif->cds->extra) && (hwif->channel == 0)) {
request_region(base+16, hwif->cds->extra, hwif->cds->name);
hwif->dma_extra = hwif->cds->extra;
}
hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base : base;
if (hwif->dma_base2) {
if (!check_mem_region(hwif->dma_base2, ports))
request_mem_region(hwif->dma_base2, ports, hwif->name);
}
return 0;
}
dma_alloc_failure: int ide_iomio_dma (ide_hwif_t *hwif, unsigned long base, unsigned int ports)
printk(" -- ERROR, UNABLE TO ALLOCATE DMA TABLES\n"); {
printk(" %s: BM-DMA at 0x%04lx-0x%04lx",
hwif->name, base, base + ports - 1);
if (!request_region(base, ports, hwif->name)) {
printk(" -- Error, ports in use.\n");
return 1;
}
hwif->dma_base = base;
if ((hwif->cds->extra) && (hwif->channel == 0)) {
request_region(base+16, hwif->cds->extra, hwif->cds->name);
hwif->dma_extra = hwif->cds->extra;
}
hwif->dma_master = (hwif->channel) ? hwif->mate->dma_base : base;
if (hwif->dma_base2) {
if (!request_region(hwif->dma_base2, ports, hwif->name))
{
printk(" -- Error, secondary ports in use.\n");
release_region(base, ports);
return 1;
}
}
return 0;
} }
/* /*
* Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space: *
*/ */
unsigned long __init ide_get_or_set_dma_base (ide_hwif_t *hwif, int extra, const char *name) int ide_dma_iobase (ide_hwif_t *hwif, unsigned long base, unsigned int ports)
{ {
unsigned long dma_base = 0; if (hwif->mmio)
struct pci_dev *dev = hwif->pci_dev; return ide_mmio_dma(hwif, base, ports);
return ide_iomio_dma(hwif, base, ports);
#ifdef CONFIG_BLK_DEV_IDEDMA_FORCED }
int second_chance = 0;
second_chance_to_dma: /*
#endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */ * This can be called for a dynamically installed interface. Don't __init it
*/
void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_ports)
{
if (ide_dma_iobase(hwif, dma_base, num_ports))
return;
if (hwif->mate && hwif->mate->dma_base) { if (ide_allocate_dma_engine(hwif)) {
dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8); ide_release_dma(hwif);
} else { return;
dma_base = pci_resource_start(dev, 4);
if (!dma_base) {
printk("%s: dma_base is invalid (0x%04lx)\n", name, dma_base);
dma_base = 0;
}
} }
#ifdef CONFIG_BLK_DEV_IDEDMA_FORCED if (!(hwif->dma_command))
if ((!dma_base) && (!second_chance)) { hwif->dma_command = hwif->dma_base;
unsigned long set_bmiba = 0; if (!(hwif->dma_vendor1))
second_chance++; hwif->dma_vendor1 = (hwif->dma_base + 1);
switch(dev->vendor) { if (!(hwif->dma_status))
case PCI_VENDOR_ID_AL: hwif->dma_status = (hwif->dma_base + 2);
set_bmiba = DEFAULT_BMALIBA; break; if (!(hwif->dma_vendor3))
case PCI_VENDOR_ID_VIA: hwif->dma_vendor3 = (hwif->dma_base + 3);
set_bmiba = DEFAULT_BMCRBA; break; if (!(hwif->dma_prdtable))
case PCI_VENDOR_ID_INTEL: hwif->dma_prdtable = (hwif->dma_base + 4);
set_bmiba = DEFAULT_BMIBA; break;
default: if (!hwif->ide_dma_off)
return dma_base; hwif->ide_dma_off = &__ide_dma_off;
} if (!hwif->ide_dma_off_quietly)
pci_write_config_dword(dev, 0x20, set_bmiba|1); hwif->ide_dma_off_quietly = &__ide_dma_off_quietly;
goto second_chance_to_dma; if (!hwif->ide_dma_host_off)
} hwif->ide_dma_host_off = &__ide_dma_host_off;
#endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */ if (!hwif->ide_dma_on)
hwif->ide_dma_on = &__ide_dma_on;
if (dma_base) { if (!hwif->ide_dma_host_on)
if (extra) /* PDC20246, PDC20262, HPT343, & HPT366 */ hwif->ide_dma_host_on = &__ide_dma_host_on;
request_region(dma_base+16, extra, name); if (!hwif->ide_dma_check)
dma_base += hwif->channel ? 8 : 0; hwif->ide_dma_check = &__ide_dma_check;
hwif->dma_extra = extra; if (!hwif->ide_dma_read)
hwif->ide_dma_read = &__ide_dma_read;
switch(dev->device) { if (!hwif->ide_dma_write)
case PCI_DEVICE_ID_AL_M5219: hwif->ide_dma_write = &__ide_dma_write;
case PCI_DEVICE_ID_AMD_VIPER_7409: if (!hwif->ide_dma_count)
case PCI_DEVICE_ID_CMD_643: hwif->ide_dma_count = &__ide_dma_count;
case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE: if (!hwif->ide_dma_begin)
OUT_BYTE(IN_BYTE(dma_base+2) & 0x60, dma_base+2); hwif->ide_dma_begin = &__ide_dma_begin;
if (IN_BYTE(dma_base+2) & 0x80) { if (!hwif->ide_dma_end)
printk("%s: simplex device: DMA forced\n", name); hwif->ide_dma_end = &__ide_dma_end;
} if (!hwif->ide_dma_test_irq)
break; hwif->ide_dma_test_irq = &__ide_dma_test_irq;
default: if (!hwif->ide_dma_bad_drive)
/* hwif->ide_dma_bad_drive = &__ide_dma_bad_drive;
* If the device claims "simplex" DMA, if (!hwif->ide_dma_good_drive)
* this means only one of the two interfaces hwif->ide_dma_good_drive = &__ide_dma_good_drive;
* can be trusted with DMA at any point in time. if (!hwif->ide_dma_verbose)
* So we should enable DMA only on one of the hwif->ide_dma_verbose = &__ide_dma_verbose;
* two interfaces. if (!hwif->ide_dma_timeout)
*/ hwif->ide_dma_timeout = &__ide_dma_timeout;
if ((IN_BYTE(dma_base+2) & 0x80)) { /* simplex device? */ if (!hwif->ide_dma_retune)
if ((!hwif->drives[0].present && !hwif->drives[1].present) || hwif->ide_dma_retune = &__ide_dma_retune;
(hwif->mate && hwif->mate->dma_base)) { if (!hwif->ide_dma_lostirq)
printk("%s: simplex device: DMA disabled\n", name); hwif->ide_dma_lostirq = &__ide_dma_lostirq;
dma_base = 0;
} if (hwif->chipset != ide_trm290) {
} u8 dma_stat = hwif->INB(hwif->dma_status);
} printk(", BIOS settings: %s:%s, %s:%s",
hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "pio",
hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio");
} }
return dma_base; printk("\n");
if (!(hwif->dma_master))
BUG();
} }
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