ide-disk: use struct ide_taskfile in __ide_do_rw_disk()

Based on the earlier work by Tejun Heo.

There should be no functionality changes caused by this patch.

Cc: Tejun Heo <htejun@gmail.com>
Acked-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent d00e42dd
......@@ -140,6 +140,7 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
u8 lba48 = (drive->addressing == 1) ? 1 : 0;
u8 command = WIN_NOP;
ata_nsector_t nsectors;
struct ide_taskfile ltf, *tf = &ltf;
nsectors.all = (u16) rq->nr_sectors;
......@@ -160,53 +161,36 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
/* FIXME: SELECT_MASK(drive, 0) ? */
memset(tf, 0, sizeof(*tf));
if (drive->select.b.lba) {
if (lba48) {
u8 tasklets[10];
pr_debug("%s: LBA=0x%012llx\n", drive->name,
(unsigned long long)block);
tasklets[0] = 0;
tasklets[1] = 0;
tasklets[2] = nsectors.b.low;
tasklets[3] = nsectors.b.high;
tasklets[4] = (u8) block;
tasklets[5] = (u8)(block >> 8);
tasklets[6] = (u8)(block >> 16);
tasklets[7] = (u8)(block >> 24);
if (sizeof(block) == 4) {
tasklets[8] = 0;
tasklets[9] = 0;
} else {
tasklets[8] = (u8)((u64)block >> 32);
tasklets[9] = (u8)((u64)block >> 40);
tf->hob_nsect = nsectors.b.high;
tf->hob_lbal = (u8)(block >> 24);
if (sizeof(block) != 4) {
tf->hob_lbam = (u8)((u64)block >> 32);
tf->hob_lbah = (u8)((u64)block >> 40);
}
tf->nsect = nsectors.b.low;
tf->lbal = (u8) block;
tf->lbam = (u8)(block >> 8);
tf->lbah = (u8)(block >> 16);
#ifdef DEBUG
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]);
drive->name, tf->hob_nsect, tf->nsect,
tf->hob_lbah, tf->hob_lbam, tf->hob_lbal,
tf->lbah, tf->lbam, tf->lbal);
#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 {
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);
tf->nsect = nsectors.b.low;
tf->lbal = block;
tf->lbam = block >>= 8;
tf->lbah = block >>= 8;
tf->device = (block >> 8) & 0xf;
}
} else {
unsigned int sect,head,cyl,track;
......@@ -217,14 +201,29 @@ static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
hwif->OUTB(0x00, IDE_FEATURE_REG);
hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
hwif->OUTB(sect, IDE_SECTOR_REG);
hwif->OUTB(cyl, IDE_LCYL_REG);
hwif->OUTB(cyl>>8, IDE_HCYL_REG);
hwif->OUTB(head|drive->select.all,IDE_SELECT_REG);
tf->nsect = nsectors.b.low;
tf->lbal = sect;
tf->lbam = cyl;
tf->lbah = cyl >> 8;
tf->device = head;
}
if (drive->select.b.lba && lba48) {
hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
}
hwif->OUTB(tf->feature, IDE_FEATURE_REG);
hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
hwif->OUTB(tf->lbam, IDE_LCYL_REG);
hwif->OUTB(tf->lbah, IDE_HCYL_REG);
hwif->OUTB(tf->device | drive->select.all, IDE_SELECT_REG);
if (dma) {
if (!hwif->dma_setup(drive)) {
if (rq_data_dir(rq)) {
......
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