* The big the bad and the ugly.
*/
-#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/sched.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 <linux/bitops.h>
#include <linux/scatterlist.h>
-#include <asm/byteorder.h>
-#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
-void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
+void ide_tf_dump(const char *s, struct ide_taskfile *tf)
{
- ide_hwif_t *hwif = drive->hwif;
- struct ide_taskfile *tf = &task->tf;
- u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
-
- if (task->tf_flags & IDE_TFLAG_FLAGGED)
- HIHI = 0xFF;
-
#ifdef DEBUG
printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
- drive->name, tf->feature, tf->nsect, tf->lbal,
+ s, tf->feature, tf->nsect, tf->lbal,
tf->lbam, tf->lbah, tf->device, tf->command);
printk("%s: hob: nsect 0x%02x lbal 0x%02x "
"lbam 0x%02x lbah 0x%02x\n",
- drive->name, tf->hob_nsect, tf->hob_lbal,
+ s, tf->hob_nsect, tf->hob_lbal,
tf->hob_lbam, tf->hob_lbah);
#endif
-
- ide_set_irq(drive, 1);
-
- if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
- SELECT_MASK(drive, 0);
-
- if (task->tf_flags & IDE_TFLAG_OUT_DATA)
- hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
-
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
- hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
- hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
- hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
- hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
- hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
-
- if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
- hwif->OUTB(tf->feature, IDE_FEATURE_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
- hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
- hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
- hwif->OUTB(tf->lbam, IDE_LCYL_REG);
- if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
- hwif->OUTB(tf->lbah, IDE_HCYL_REG);
-
- if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
- hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
}
int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
return ide_raw_taskfile(drive, &args, buf, 1);
}
-static int inline task_dma_ok(ide_task_t *task)
-{
- if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
- return 1;
-
- switch (task->tf.command) {
- case WIN_WRITEDMA_ONCE:
- case WIN_WRITEDMA:
- case WIN_WRITEDMA_EXT:
- case WIN_READDMA_ONCE:
- case WIN_READDMA:
- case WIN_READDMA_EXT:
- case WIN_IDENTIFY_DMA:
- return 1;
- }
-
- return 0;
-}
-
static ide_startstop_t task_no_data_intr(ide_drive_t *);
static ide_startstop_t set_geometry_intr(ide_drive_t *);
static ide_startstop_t recal_intr(ide_drive_t *);
ide_hwif_t *hwif = HWIF(drive);
struct ide_taskfile *tf = &task->tf;
ide_handler_t *handler = NULL;
+ const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+ const struct ide_dma_ops *dma_ops = hwif->dma_ops;
if (task->data_phase == TASKFILE_MULTI_IN ||
task->data_phase == TASKFILE_MULTI_OUT) {
if (task->tf_flags & IDE_TFLAG_FLAGGED)
task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
- if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
- ide_tf_load(drive, task);
+ if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
+ ide_tf_dump(drive->name, tf);
+ tp_ops->set_irq(hwif, 1);
+ SELECT_MASK(drive, 0);
+ tp_ops->tf_load(drive, task);
+ }
switch (task->data_phase) {
case TASKFILE_MULTI_OUT:
case TASKFILE_OUT:
- hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
+ tp_ops->exec_command(hwif, tf->command);
ndelay(400); /* FIXME */
return pre_task_out_intr(drive, task->rq);
case TASKFILE_MULTI_IN:
WAIT_WORSTCASE, NULL);
return ide_started;
default:
- if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
- hwif->dma_setup(drive))
+ if (drive->using_dma == 0 || dma_ops->dma_setup(drive))
return ide_stopped;
- hwif->dma_exec_cmd(drive, tf->command);
- hwif->dma_start(drive);
+ dma_ops->dma_exec_cmd(drive, tf->command);
+ dma_ops->dma_start(drive);
return ide_started;
}
}
*/
static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
{
- u8 stat = ide_read_status(drive);
+ ide_hwif_t *hwif = drive->hwif;
+ u8 stat;
+
+ local_irq_enable_in_hardirq();
+ stat = hwif->tp_ops->read_status(hwif);
if (OK_STAT(stat, READY_STAT, BAD_STAT))
drive->mult_count = drive->mult_req;
*/
static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
{
+ ide_hwif_t *hwif = drive->hwif;
int retries = 5;
u8 stat;
- while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
+ local_irq_enable_in_hardirq();
+
+ while (1) {
+ stat = hwif->tp_ops->read_status(hwif);
+ if ((stat & BUSY_STAT) == 0 || retries-- == 0)
+ break;
udelay(10);
+ };
if (OK_STAT(stat, READY_STAT, BAD_STAT))
return ide_stopped;
if (stat & (ERR_STAT|DRQ_STAT))
return ide_error(drive, "set_geometry_intr", stat);
- BUG_ON(HWGROUP(drive)->handler != NULL);
ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
return ide_started;
}
*/
static ide_startstop_t recal_intr(ide_drive_t *drive)
{
- u8 stat = ide_read_status(drive);
+ ide_hwif_t *hwif = drive->hwif;
+ u8 stat;
+
+ local_irq_enable_in_hardirq();
+ stat = hwif->tp_ops->read_status(hwif);
if (!OK_STAT(stat, READY_STAT, BAD_STAT))
return ide_error(drive, "recal_intr", stat);
*/
static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
{
- ide_task_t *args = HWGROUP(drive)->rq->special;
+ ide_hwif_t *hwif = drive->hwif;
+ ide_task_t *args = hwif->hwgroup->rq->special;
u8 stat;
local_irq_enable_in_hardirq();
- stat = ide_read_status(drive);
+ stat = hwif->tp_ops->read_status(hwif);
if (!OK_STAT(stat, READY_STAT, BAD_STAT))
return ide_error(drive, "task_no_data_intr", stat);
static u8 wait_drive_not_busy(ide_drive_t *drive)
{
+ ide_hwif_t *hwif = drive->hwif;
int retries;
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.
+ * Last sector was transfered, wait until device is ready. This can
+ * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
*/
- for (retries = 0; retries < 100; retries++) {
- stat = ide_read_status(drive);
+ for (retries = 0; retries < 1000; retries++) {
+ stat = hwif->tp_ops->read_status(hwif);
if (stat & BUSY_STAT)
udelay(10);
return stat;
}
-static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
+static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
+ unsigned int write)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
/* do the actual data transfer */
if (write)
- hwif->ata_output_data(drive, buf, SECTOR_WORDS);
+ hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
else
- hwif->ata_input_data(drive, buf, SECTOR_WORDS);
+ hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
kunmap_atomic(buf, KM_BIO_SRC_IRQ);
#ifdef CONFIG_HIGHMEM
#endif
}
-static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
+static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
+ unsigned int write)
{
unsigned int nsect;
nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
while (nsect--)
- ide_pio_sector(drive, write);
+ ide_pio_sector(drive, rq, write);
}
static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
switch (drive->hwif->data_phase) {
case TASKFILE_MULTI_IN:
case TASKFILE_MULTI_OUT:
- ide_pio_multi(drive, write);
+ ide_pio_multi(drive, rq, write);
break;
default:
- ide_pio_sector(drive, write);
+ ide_pio_sector(drive, rq, write);
break;
}
}
/*
+ * We got an interrupt on a task_in case, but no errors and no DRQ.
+ *
+ * It might be a spurious irq (shared irq), but it might be a
+ * command that had no output.
+ */
+static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
+{
+ /* Command all done? */
+ if (OK_STAT(stat, READY_STAT, BUSY_STAT)) {
+ task_end_request(drive, rq, stat);
+ return ide_stopped;
+ }
+
+ /* Assume it was a spurious irq */
+ ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
+ return ide_started;
+}
+
+/*
* Handler for command with PIO data-in phase (Read/Read Multiple).
*/
static ide_startstop_t task_in_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = HWGROUP(drive)->rq;
- u8 stat = ide_read_status(drive);
-
- /* new way for dealing with premature shared PCI interrupts */
- if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
- if (stat & (ERR_STAT | DRQ_STAT))
- return task_error(drive, rq, __FUNCTION__, stat);
- /* No data yet, so wait for another IRQ. */
- ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
- return ide_started;
- }
+ struct request *rq = hwif->hwgroup->rq;
+ u8 stat = hwif->tp_ops->read_status(hwif);
+
+ /* Error? */
+ if (stat & ERR_STAT)
+ return task_error(drive, rq, __func__, stat);
+
+ /* Didn't want any data? Odd. */
+ if (!(stat & DRQ_STAT))
+ return task_in_unexpected(drive, rq, stat);
ide_pio_datablock(drive, rq, 0);
- /* If it was the last datablock check status and finish transfer. */
+ /* Are we done? Check status and finish transfer. */
if (!hwif->nleft) {
stat = wait_drive_not_busy(drive);
if (!OK_STAT(stat, 0, BAD_STAT))
- return task_error(drive, rq, __FUNCTION__, stat);
+ return task_error(drive, rq, __func__, stat);
task_end_request(drive, rq, stat);
return ide_stopped;
}
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = HWGROUP(drive)->rq;
- u8 stat = ide_read_status(drive);
+ u8 stat = hwif->tp_ops->read_status(hwif);
if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
- return task_error(drive, rq, __FUNCTION__, stat);
+ return task_error(drive, rq, __func__, stat);
/* Deal with unexpected ATA data phase. */
if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
- return task_error(drive, rq, __FUNCTION__, stat);
+ return task_error(drive, rq, __func__, stat);
if (!hwif->nleft) {
task_end_request(drive, rq, stat);
int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
{
- struct request rq;
+ struct request *rq;
+ int error;
- memset(&rq, 0, sizeof(rq));
- rq.ref_count = 1;
- rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
- rq.buffer = buf;
+ rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
+ rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
+ rq->buffer = buf;
/*
* (ks) We transfer currently only whole sectors.
* if we would find a solution to transfer any size.
* To support special commands like READ LONG.
*/
- rq.hard_nr_sectors = rq.nr_sectors = nsect;
- rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
+ rq->hard_nr_sectors = rq->nr_sectors = nsect;
+ rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
if (task->tf_flags & IDE_TFLAG_WRITE)
- rq.cmd_flags |= REQ_RW;
+ rq->cmd_flags |= REQ_RW;
+
+ rq->special = task;
+ task->rq = rq;
- rq.special = task;
- task->rq = &rq;
+ error = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_put_request(rq);
- return ide_do_drive_cmd(drive, &rq, ide_wait);
+ return error;
}
EXPORT_SYMBOL(ide_raw_taskfile);
/* (hs): give up if multcount is not set */
printk(KERN_ERR "%s: %s Multimode Write " \
"multcount is not set\n",
- drive->name, __FUNCTION__);
+ drive->name, __func__);
err = -EPERM;
goto abort;
}
/* (hs): give up if multcount is not set */
printk(KERN_ERR "%s: %s Multimode Read failure " \
"multcount is not set\n",
- drive->name, __FUNCTION__);
+ drive->name, __func__);
err = -EPERM;
goto abort;
}
struct hd_driveid *id = drive->id;
if (NULL == (void *) arg) {
- struct request rq;
+ struct request *rq;
- ide_init_drive_cmd(&rq);
- rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
+ rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
+ rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
+ err = blk_execute_rq(drive->queue, NULL, rq, 0);
+ blk_put_request(rq);
- return ide_do_drive_cmd(drive, &rq, ide_wait);
+ return err;
}
if (copy_from_user(args, (void __user *)arg, 4))
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