#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/ide.h>
+#include <linux/hdreg.h>
#include <linux/completion.h>
#include <linux/reboot.h>
#include <linux/cdrom.h>
* decide whether to reenable DMA -- 3 is a random magic for now,
* if we DMA timeout more than 3 times, just stay in PIO
*/
- if (drive->state == DMA_PIO_RETRY && drive->retry_pio <= 3) {
- drive->state = 0;
+ if ((drive->dev_flags & IDE_DFLAG_DMA_PIO_RETRY) &&
+ drive->retry_pio <= 3) {
+ drive->dev_flags &= ~IDE_DFLAG_DMA_PIO_RETRY;
ide_dma_on(drive);
}
- if (!__blk_end_request(rq, error, nr_bytes)) {
- if (dequeue)
- HWGROUP(drive)->rq = NULL;
+ if (!blk_end_request(rq, error, nr_bytes))
ret = 0;
- }
+
+ if (ret == 0 && dequeue)
+ drive->hwif->rq = NULL;
return ret;
}
int ide_end_request (ide_drive_t *drive, int uptodate, int nr_sectors)
{
unsigned int nr_bytes = nr_sectors << 9;
- struct request *rq;
- unsigned long flags;
- int ret = 1;
-
- /*
- * room for locking improvements here, the calls below don't
- * need the queue lock held at all
- */
- spin_lock_irqsave(&ide_lock, flags);
- rq = HWGROUP(drive)->rq;
+ struct request *rq = drive->hwif->rq;
if (!nr_bytes) {
if (blk_pc_request(rq))
nr_bytes = rq->hard_cur_sectors << 9;
}
- ret = __ide_end_request(drive, rq, uptodate, nr_bytes, 1);
-
- spin_unlock_irqrestore(&ide_lock, flags);
- return ret;
+ return __ide_end_request(drive, rq, uptodate, nr_bytes, 1);
}
EXPORT_SYMBOL(ide_end_request);
-/*
- * Power Management state machine. This one is rather trivial for now,
- * we should probably add more, like switching back to PIO on suspend
- * to help some BIOSes, re-do the door locking on resume, etc...
- */
-
-enum {
- ide_pm_flush_cache = ide_pm_state_start_suspend,
- idedisk_pm_standby,
-
- idedisk_pm_restore_pio = ide_pm_state_start_resume,
- idedisk_pm_idle,
- ide_pm_restore_dma,
-};
-
-static void ide_complete_power_step(ide_drive_t *drive, struct request *rq, u8 stat, u8 error)
-{
- struct request_pm_state *pm = rq->data;
-
- if (drive->media != ide_disk)
- return;
-
- switch (pm->pm_step) {
- case ide_pm_flush_cache: /* Suspend step 1 (flush cache) complete */
- if (pm->pm_state == PM_EVENT_FREEZE)
- pm->pm_step = ide_pm_state_completed;
- else
- pm->pm_step = idedisk_pm_standby;
- break;
- case idedisk_pm_standby: /* Suspend step 2 (standby) complete */
- pm->pm_step = ide_pm_state_completed;
- break;
- case idedisk_pm_restore_pio: /* Resume step 1 complete */
- pm->pm_step = idedisk_pm_idle;
- break;
- case idedisk_pm_idle: /* Resume step 2 (idle) complete */
- pm->pm_step = ide_pm_restore_dma;
- break;
- }
-}
-
-static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
-{
- struct request_pm_state *pm = rq->data;
- ide_task_t *args = rq->special;
-
- memset(args, 0, sizeof(*args));
-
- switch (pm->pm_step) {
- case ide_pm_flush_cache: /* Suspend step 1 (flush cache) */
- if (drive->media != ide_disk)
- break;
- /* Not supported? Switch to next step now. */
- if (!drive->wcache || !ide_id_has_flush_cache(drive->id)) {
- ide_complete_power_step(drive, rq, 0, 0);
- return ide_stopped;
- }
- if (ide_id_has_flush_cache_ext(drive->id))
- args->tf.command = WIN_FLUSH_CACHE_EXT;
- else
- args->tf.command = WIN_FLUSH_CACHE;
- goto out_do_tf;
-
- case idedisk_pm_standby: /* Suspend step 2 (standby) */
- args->tf.command = WIN_STANDBYNOW1;
- goto out_do_tf;
-
- case idedisk_pm_restore_pio: /* Resume step 1 (restore PIO) */
- ide_set_max_pio(drive);
- /*
- * skip idedisk_pm_idle for ATAPI devices
- */
- if (drive->media != ide_disk)
- pm->pm_step = ide_pm_restore_dma;
- else
- ide_complete_power_step(drive, rq, 0, 0);
- return ide_stopped;
-
- case idedisk_pm_idle: /* Resume step 2 (idle) */
- args->tf.command = WIN_IDLEIMMEDIATE;
- goto out_do_tf;
-
- case ide_pm_restore_dma: /* Resume step 3 (restore DMA) */
- /*
- * Right now, all we do is call ide_set_dma(drive),
- * we could be smarter and check for current xfer_speed
- * in struct drive etc...
- */
- if (drive->hwif->dma_ops == NULL)
- break;
- /*
- * TODO: respect ->using_dma setting
- */
- ide_set_dma(drive);
- break;
- }
- pm->pm_step = ide_pm_state_completed;
- return ide_stopped;
-
-out_do_tf:
- args->tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
- args->data_phase = TASKFILE_NO_DATA;
- return do_rw_taskfile(drive, args);
-}
-
/**
* ide_end_dequeued_request - complete an IDE I/O
* @drive: IDE device for the I/O
int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
int uptodate, int nr_sectors)
{
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&ide_lock, flags);
BUG_ON(!blk_rq_started(rq));
- ret = __ide_end_request(drive, rq, uptodate, nr_sectors << 9, 0);
- spin_unlock_irqrestore(&ide_lock, flags);
- return ret;
+ return __ide_end_request(drive, rq, uptodate, nr_sectors << 9, 0);
}
EXPORT_SYMBOL_GPL(ide_end_dequeued_request);
-
-/**
- * ide_complete_pm_request - end the current Power Management request
- * @drive: target drive
- * @rq: request
- *
- * This function cleans up the current PM request and stops the queue
- * if necessary.
- */
-static void ide_complete_pm_request (ide_drive_t *drive, struct request *rq)
-{
- unsigned long flags;
-
-#ifdef DEBUG_PM
- printk("%s: completing PM request, %s\n", drive->name,
- blk_pm_suspend_request(rq) ? "suspend" : "resume");
-#endif
- spin_lock_irqsave(&ide_lock, flags);
- if (blk_pm_suspend_request(rq)) {
- blk_stop_queue(drive->queue);
- } else {
- drive->blocked = 0;
- blk_start_queue(drive->queue);
- }
- HWGROUP(drive)->rq = NULL;
- if (__blk_end_request(rq, 0, 0))
- BUG();
- spin_unlock_irqrestore(&ide_lock, flags);
-}
-
/**
* ide_end_drive_cmd - end an explicit drive command
* @drive: command
void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
{
- unsigned long flags;
- struct request *rq;
-
- spin_lock_irqsave(&ide_lock, flags);
- rq = HWGROUP(drive)->rq;
- spin_unlock_irqrestore(&ide_lock, flags);
+ ide_hwif_t *hwif = drive->hwif;
+ struct request *rq = hwif->rq;
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
ide_task_t *task = (ide_task_t *)rq->special;
- if (rq->errors == 0)
- rq->errors = !OK_STAT(stat, READY_STAT, BAD_STAT);
-
if (task) {
struct ide_taskfile *tf = &task->tf;
tf->error = err;
tf->status = stat;
- drive->hwif->tf_read(drive, task);
+ drive->hwif->tp_ops->tf_read(drive, task);
if (task->tf_flags & IDE_TFLAG_DYN)
kfree(task);
}
} else if (blk_pm_request(rq)) {
struct request_pm_state *pm = rq->data;
-#ifdef DEBUG_PM
- printk("%s: complete_power_step(step: %d, stat: %x, err: %x)\n",
- drive->name, rq->pm->pm_step, stat, err);
-#endif
- ide_complete_power_step(drive, rq, stat, err);
- if (pm->pm_step == ide_pm_state_completed)
+
+ ide_complete_power_step(drive, rq);
+ if (pm->pm_step == IDE_PM_COMPLETED)
ide_complete_pm_request(drive, rq);
return;
}
- spin_lock_irqsave(&ide_lock, flags);
- HWGROUP(drive)->rq = NULL;
+ hwif->rq = NULL;
+
rq->errors = err;
- if (unlikely(__blk_end_request(rq, (rq->errors ? -EIO : 0),
- blk_rq_bytes(rq))))
+
+ if (unlikely(blk_end_request(rq, (rq->errors ? -EIO : 0),
+ blk_rq_bytes(rq))))
BUG();
- spin_unlock_irqrestore(&ide_lock, flags);
}
-
EXPORT_SYMBOL(ide_end_drive_cmd);
static void ide_kill_rq(ide_drive_t *drive, struct request *rq)
{
if (rq->rq_disk) {
- ide_driver_t *drv;
+ struct ide_driver *drv;
- drv = *(ide_driver_t **)rq->rq_disk->private_data;
+ drv = *(struct ide_driver **)rq->rq_disk->private_data;
drv->end_request(drive, 0, 0);
} else
ide_end_request(drive, 0, 0);
{
ide_hwif_t *hwif = drive->hwif;
- if (stat & BUSY_STAT || ((stat & WRERR_STAT) && !drive->nowerr)) {
+ if ((stat & ATA_BUSY) ||
+ ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
/* other bits are useless when BUSY */
rq->errors |= ERROR_RESET;
- } else if (stat & ERR_STAT) {
+ } else if (stat & ATA_ERR) {
/* err has different meaning on cdrom and tape */
- if (err == ABRT_ERR) {
- if (drive->select.b.lba &&
- /* some newer drives don't support WIN_SPECIFY */
- hwif->INB(hwif->io_ports.command_addr) ==
- WIN_SPECIFY)
+ if (err == ATA_ABORTED) {
+ if ((drive->dev_flags & IDE_DFLAG_LBA) &&
+ /* some newer drives don't support ATA_CMD_INIT_DEV_PARAMS */
+ hwif->tp_ops->read_status(hwif) == ATA_CMD_INIT_DEV_PARAMS)
return ide_stopped;
} else if ((err & BAD_CRC) == BAD_CRC) {
/* UDMA crc error, just retry the operation */
drive->crc_count++;
- } else if (err & (BBD_ERR | ECC_ERR)) {
+ } else if (err & (ATA_BBK | ATA_UNC)) {
/* retries won't help these */
rq->errors = ERROR_MAX;
- } else if (err & TRK0_ERR) {
+ } else if (err & ATA_TRK0NF) {
/* help it find track zero */
rq->errors |= ERROR_RECAL;
}
}
- if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ &&
+ if ((stat & ATA_DRQ) && rq_data_dir(rq) == READ &&
(hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) {
int nsect = drive->mult_count ? drive->mult_count : 1;
return ide_stopped;
}
- if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
+ if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
rq->errors |= ERROR_RESET;
if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
{
ide_hwif_t *hwif = drive->hwif;
- if (stat & BUSY_STAT || ((stat & WRERR_STAT) && !drive->nowerr)) {
+ if ((stat & ATA_BUSY) ||
+ ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
/* other bits are useless when BUSY */
rq->errors |= ERROR_RESET;
} else {
/* add decoding error stuff */
}
- if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
+ if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
/* force an abort */
- hwif->OUTBSYNC(hwif, WIN_IDLEIMMEDIATE,
- hwif->io_ports.command_addr);
+ hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
if (rq->errors >= ERROR_MAX) {
ide_kill_rq(drive, rq);
return ide_stopped;
}
-ide_startstop_t
+static ide_startstop_t
__ide_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
{
if (drive->media == ide_disk)
return ide_atapi_error(drive, rq, stat, err);
}
-EXPORT_SYMBOL_GPL(__ide_error);
-
/**
* ide_error - handle an error on the IDE
* @drive: drive the error occurred on
err = ide_dump_status(drive, msg, stat);
- if ((rq = HWGROUP(drive)->rq) == NULL)
+ rq = drive->hwif->rq;
+ if (rq == NULL)
return ide_stopped;
/* retry only "normal" I/O: */
return ide_stopped;
}
- if (rq->rq_disk) {
- ide_driver_t *drv;
-
- drv = *(ide_driver_t **)rq->rq_disk->private_data;
- return drv->error(drive, rq, stat, err);
- } else
- return __ide_error(drive, rq, stat, err);
+ return __ide_error(drive, rq, stat, err);
}
-
EXPORT_SYMBOL_GPL(ide_error);
-ide_startstop_t __ide_abort(ide_drive_t *drive, struct request *rq)
-{
- if (drive->media != ide_disk)
- rq->errors |= ERROR_RESET;
-
- ide_kill_rq(drive, rq);
-
- return ide_stopped;
-}
-
-EXPORT_SYMBOL_GPL(__ide_abort);
-
-/**
- * ide_abort - abort pending IDE operations
- * @drive: drive the error occurred on
- * @msg: message to report
- *
- * ide_abort kills and cleans up when we are about to do a
- * host initiated reset on active commands. Longer term we
- * want handlers to have sensible abort handling themselves
- *
- * This differs fundamentally from ide_error because in
- * this case the command is doing just fine when we
- * blow it away.
- */
-
-ide_startstop_t ide_abort(ide_drive_t *drive, const char *msg)
-{
- struct request *rq;
-
- if (drive == NULL || (rq = HWGROUP(drive)->rq) == NULL)
- return ide_stopped;
-
- /* retry only "normal" I/O: */
- if (!blk_fs_request(rq)) {
- rq->errors = 1;
- ide_end_drive_cmd(drive, BUSY_STAT, 0);
- return ide_stopped;
- }
-
- if (rq->rq_disk) {
- ide_driver_t *drv;
-
- drv = *(ide_driver_t **)rq->rq_disk->private_data;
- return drv->abort(drive, rq);
- } else
- return __ide_abort(drive, rq);
-}
-
static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
{
tf->nsect = drive->sect;
tf->lbal = drive->sect;
tf->lbam = drive->cyl;
tf->lbah = drive->cyl >> 8;
- tf->device = ((drive->head - 1) | drive->select.all) & ~ATA_LBA;
- tf->command = WIN_SPECIFY;
+ tf->device = (drive->head - 1) | drive->select;
+ tf->command = ATA_CMD_INIT_DEV_PARAMS;
}
static void ide_tf_set_restore_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
{
tf->nsect = drive->sect;
- tf->command = WIN_RESTORE;
+ tf->command = ATA_CMD_RESTORE;
}
static void ide_tf_set_setmult_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
{
tf->nsect = drive->mult_req;
- tf->command = WIN_SETMULT;
+ tf->command = ATA_CMD_SET_MULTI;
}
static ide_startstop_t ide_disk_special(ide_drive_t *drive)
ide_tf_set_restore_cmd(drive, &args.tf);
} else if (s->b.set_multmode) {
s->b.set_multmode = 0;
- if (drive->mult_req > drive->id->max_multsect)
- drive->mult_req = drive->id->max_multsect;
ide_tf_set_setmult_cmd(drive, &args.tf);
} else if (s->all) {
int special = s->all;
return ide_started;
}
-/*
- * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away
- */
-static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio)
-{
- switch (req_pio) {
- case 202:
- case 201:
- case 200:
- case 102:
- case 101:
- case 100:
- return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0;
- case 9:
- case 8:
- return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0;
- case 7:
- case 6:
- return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0;
- default:
- return 0;
- }
-}
-
/**
* do_special - issue some special commands
* @drive: drive the command is for
*
- * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
- * commands to a drive. It used to do much more, but has been scaled
- * back.
+ * do_special() is used to issue ATA_CMD_INIT_DEV_PARAMS,
+ * ATA_CMD_RESTORE and ATA_CMD_SET_MULTI commands to a drive.
+ *
+ * It used to do much more, but has been scaled back.
*/
static ide_startstop_t do_special (ide_drive_t *drive)
#ifdef DEBUG
printk("%s: do_special: 0x%02x\n", drive->name, s->all);
#endif
- if (s->b.set_tune) {
- ide_hwif_t *hwif = drive->hwif;
- const struct ide_port_ops *port_ops = hwif->port_ops;
- u8 req_pio = drive->tune_req;
-
- s->b.set_tune = 0;
-
- if (set_pio_mode_abuse(drive->hwif, req_pio)) {
- /*
- * take ide_lock for drive->[no_]unmask/[no_]io_32bit
- */
- if (req_pio == 8 || req_pio == 9) {
- unsigned long flags;
-
- spin_lock_irqsave(&ide_lock, flags);
- port_ops->set_pio_mode(drive, req_pio);
- spin_unlock_irqrestore(&ide_lock, flags);
- } else
- port_ops->set_pio_mode(drive, req_pio);
- } else {
- int keep_dma = drive->using_dma;
-
- ide_set_pio(drive, req_pio);
-
- if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) {
- if (keep_dma)
- ide_dma_on(drive);
- }
- }
-
- return ide_stopped;
- } else {
- if (drive->media == ide_disk)
- return ide_disk_special(drive);
+ if (drive->media == ide_disk)
+ return ide_disk_special(drive);
- s->all = 0;
- drive->mult_req = 0;
- return ide_stopped;
- }
+ s->all = 0;
+ drive->mult_req = 0;
+ return ide_stopped;
}
void ide_map_sg(ide_drive_t *drive, struct request *rq)
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
- if (hwif->sg_mapped) /* needed by ide-scsi */
- return;
-
- if (rq->cmd_type != REQ_TYPE_ATA_TASKFILE) {
- hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
- } else {
+ if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
sg_init_one(sg, rq->buffer, rq->nr_sectors * SECTOR_SIZE);
hwif->sg_nents = 1;
+ } else if (!rq->bio) {
+ sg_init_one(sg, rq->data, rq->data_len);
+ hwif->sg_nents = 1;
+ } else {
+ hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
}
}
static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
struct request *rq)
{
- ide_hwif_t *hwif = HWIF(drive);
+ ide_hwif_t *hwif = drive->hwif;
ide_task_t *task = rq->special;
if (task) {
#ifdef DEBUG
printk("%s: DRIVE_CMD (null)\n", drive->name);
#endif
- ide_end_drive_cmd(drive, ide_read_status(drive), ide_read_error(drive));
+ ide_end_drive_cmd(drive, hwif->tp_ops->read_status(hwif),
+ ide_read_error(drive));
return ide_stopped;
}
+int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
+ int arg)
+{
+ struct request_queue *q = drive->queue;
+ struct request *rq;
+ int ret = 0;
+
+ if (!(setting->flags & DS_SYNC))
+ return setting->set(drive, arg);
+
+ rq = blk_get_request(q, READ, __GFP_WAIT);
+ rq->cmd_type = REQ_TYPE_SPECIAL;
+ rq->cmd_len = 5;
+ rq->cmd[0] = REQ_DEVSET_EXEC;
+ *(int *)&rq->cmd[1] = arg;
+ rq->special = setting->set;
+
+ if (blk_execute_rq(q, NULL, rq, 0))
+ ret = rq->errors;
+ blk_put_request(rq);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ide_devset_execute);
+
static ide_startstop_t ide_special_rq(ide_drive_t *drive, struct request *rq)
{
- switch (rq->cmd[0]) {
+ u8 cmd = rq->cmd[0];
+
+ if (cmd == REQ_PARK_HEADS || cmd == REQ_UNPARK_HEADS) {
+ ide_task_t task;
+ struct ide_taskfile *tf = &task.tf;
+
+ memset(&task, 0, sizeof(task));
+ if (cmd == REQ_PARK_HEADS) {
+ drive->sleep = *(unsigned long *)rq->special;
+ drive->dev_flags |= IDE_DFLAG_SLEEPING;
+ tf->command = ATA_CMD_IDLEIMMEDIATE;
+ tf->feature = 0x44;
+ tf->lbal = 0x4c;
+ tf->lbam = 0x4e;
+ tf->lbah = 0x55;
+ task.tf_flags |= IDE_TFLAG_CUSTOM_HANDLER;
+ } else /* cmd == REQ_UNPARK_HEADS */
+ tf->command = ATA_CMD_CHK_POWER;
+
+ task.tf_flags |= IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
+ task.rq = rq;
+ drive->hwif->data_phase = task.data_phase = TASKFILE_NO_DATA;
+ return do_rw_taskfile(drive, &task);
+ }
+
+ switch (cmd) {
+ case REQ_DEVSET_EXEC:
+ {
+ int err, (*setfunc)(ide_drive_t *, int) = rq->special;
+
+ err = setfunc(drive, *(int *)&rq->cmd[1]);
+ if (err)
+ rq->errors = err;
+ else
+ err = 1;
+ ide_end_request(drive, err, 0);
+ return ide_stopped;
+ }
case REQ_DRIVE_RESET:
return ide_do_reset(drive);
default:
}
}
-static void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
-{
- struct request_pm_state *pm = rq->data;
-
- if (blk_pm_suspend_request(rq) &&
- pm->pm_step == ide_pm_state_start_suspend)
- /* Mark drive blocked when starting the suspend sequence. */
- drive->blocked = 1;
- else if (blk_pm_resume_request(rq) &&
- pm->pm_step == ide_pm_state_start_resume) {
- /*
- * The first thing we do on wakeup is to wait for BSY bit to
- * go away (with a looong timeout) as a drive on this hwif may
- * just be POSTing itself.
- * We do that before even selecting as the "other" device on
- * the bus may be broken enough to walk on our toes at this
- * point.
- */
- int rc;
-#ifdef DEBUG_PM
- printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);
-#endif
- rc = ide_wait_not_busy(HWIF(drive), 35000);
- if (rc)
- printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);
- SELECT_DRIVE(drive);
- ide_set_irq(drive, 1);
- rc = ide_wait_not_busy(HWIF(drive), 100000);
- if (rc)
- printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);
- }
-}
-
/**
* start_request - start of I/O and command issuing for IDE
*
* start_request() initiates handling of a new I/O request. It
- * accepts commands and I/O (read/write) requests. It also does
- * the final remapping for weird stuff like EZDrive. Once
- * device mapper can work sector level the EZDrive stuff can go away
+ * accepts commands and I/O (read/write) requests.
*
* FIXME: this function needs a rename
*/
static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
{
ide_startstop_t startstop;
- sector_t block;
BUG_ON(!blk_rq_started(rq));
#ifdef DEBUG
printk("%s: start_request: current=0x%08lx\n",
- HWIF(drive)->name, (unsigned long) rq);
+ drive->hwif->name, (unsigned long) rq);
#endif
/* bail early if we've exceeded max_failures */
goto kill_rq;
}
- block = rq->sector;
- if (blk_fs_request(rq) &&
- (drive->media == ide_disk || drive->media == ide_floppy)) {
- block += drive->sect0;
- }
- /* Yecch - this will shift the entire interval,
- possibly killing some innocent following sector */
- if (block == 0 && drive->remap_0_to_1 == 1)
- block = 1; /* redirect MBR access to EZ-Drive partn table */
-
if (blk_pm_request(rq))
ide_check_pm_state(drive, rq);
SELECT_DRIVE(drive);
- if (ide_wait_stat(&startstop, drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) {
+ if (ide_wait_stat(&startstop, drive, drive->ready_stat,
+ ATA_BUSY | ATA_DRQ, WAIT_READY)) {
printk(KERN_ERR "%s: drive not ready for command\n", drive->name);
return startstop;
}
if (!drive->special.all) {
- ide_driver_t *drv;
+ struct ide_driver *drv;
/*
* We reset the drive so we need to issue a SETFEATURES.
struct request_pm_state *pm = rq->data;
#ifdef DEBUG_PM
printk("%s: start_power_step(step: %d)\n",
- drive->name, rq->pm->pm_step);
+ drive->name, pm->pm_step);
#endif
startstop = ide_start_power_step(drive, rq);
if (startstop == ide_stopped &&
- pm->pm_step == ide_pm_state_completed)
+ pm->pm_step == IDE_PM_COMPLETED)
ide_complete_pm_request(drive, rq);
return startstop;
} else if (!rq->rq_disk && blk_special_request(rq))
*/
return ide_special_rq(drive, rq);
- drv = *(ide_driver_t **)rq->rq_disk->private_data;
- return drv->do_request(drive, rq, block);
+ drv = *(struct ide_driver **)rq->rq_disk->private_data;
+
+ return drv->do_request(drive, rq, rq->sector);
}
return do_special(drive);
kill_rq:
* @timeout: time to stall for (jiffies)
*
* ide_stall_queue() can be used by a drive to give excess bandwidth back
- * to the hwgroup by sleeping for timeout jiffies.
+ * to the port by sleeping for timeout jiffies.
*/
void ide_stall_queue (ide_drive_t *drive, unsigned long timeout)
if (timeout > WAIT_WORSTCASE)
timeout = WAIT_WORSTCASE;
drive->sleep = timeout + jiffies;
- drive->sleeping = 1;
+ drive->dev_flags |= IDE_DFLAG_SLEEPING;
}
-
EXPORT_SYMBOL(ide_stall_queue);
-#define WAKEUP(drive) ((drive)->service_start + 2 * (drive)->service_time)
+static inline int ide_lock_port(ide_hwif_t *hwif)
+{
+ if (hwif->busy)
+ return 1;
-/**
- * choose_drive - select a drive to service
- * @hwgroup: hardware group to select on
- *
- * choose_drive() selects the next drive which will be serviced.
- * This is necessary because the IDE layer can't issue commands
- * to both drives on the same cable, unlike SCSI.
- */
-
-static inline ide_drive_t *choose_drive (ide_hwgroup_t *hwgroup)
+ hwif->busy = 1;
+
+ return 0;
+}
+
+static inline void ide_unlock_port(ide_hwif_t *hwif)
{
- ide_drive_t *drive, *best;
+ hwif->busy = 0;
+}
+
+static inline int ide_lock_host(struct ide_host *host, ide_hwif_t *hwif)
+{
+ int rc = 0;
+
+ if (host->host_flags & IDE_HFLAG_SERIALIZE) {
+ rc = test_and_set_bit_lock(IDE_HOST_BUSY, &host->host_busy);
+ if (rc == 0) {
+ /* for atari only */
+ ide_get_lock(ide_intr, hwif);
+ }
+ }
+ return rc;
+}
+
+static inline void ide_unlock_host(struct ide_host *host)
+{
+ if (host->host_flags & IDE_HFLAG_SERIALIZE) {
+ /* for atari only */
+ ide_release_lock();
+ clear_bit_unlock(IDE_HOST_BUSY, &host->host_busy);
+ }
+}
-repeat:
- best = NULL;
- drive = hwgroup->drive;
+/*
+ * Issue a new request to a device.
+ */
+void do_ide_request(struct request_queue *q)
+{
+ ide_drive_t *drive = q->queuedata;
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_host *host = hwif->host;
+ struct request *rq = NULL;
+ ide_startstop_t startstop;
/*
* drive is doing pre-flush, ordered write, post-flush sequence. even
* though that is 3 requests, it must be seen as a single transaction.
* we must not preempt this drive until that is complete
*/
- if (blk_queue_flushing(drive->queue)) {
+ if (blk_queue_flushing(q))
/*
* small race where queue could get replugged during
* the 3-request flush cycle, just yank the plug since
* we want it to finish asap
*/
- blk_remove_plug(drive->queue);
- return drive;
- }
+ blk_remove_plug(q);
- do {
- if ((!drive->sleeping || time_after_eq(jiffies, drive->sleep))
- && !elv_queue_empty(drive->queue)) {
- if (!best
- || (drive->sleeping && (!best->sleeping || time_before(drive->sleep, best->sleep)))
- || (!best->sleeping && time_before(WAKEUP(drive), WAKEUP(best))))
- {
- if (!blk_queue_plugged(drive->queue))
- best = drive;
- }
- }
- } while ((drive = drive->next) != hwgroup->drive);
- if (best && best->nice1 && !best->sleeping && best != hwgroup->drive && best->service_time > WAIT_MIN_SLEEP) {
- long t = (signed long)(WAKEUP(best) - jiffies);
- if (t >= WAIT_MIN_SLEEP) {
- /*
- * We *may* have some time to spare, but first let's see if
- * someone can potentially benefit from our nice mood today..
- */
- drive = best->next;
- do {
- if (!drive->sleeping
- && time_before(jiffies - best->service_time, WAKEUP(drive))
- && time_before(WAKEUP(drive), jiffies + t))
- {
- ide_stall_queue(best, min_t(long, t, 10 * WAIT_MIN_SLEEP));
- goto repeat;
- }
- } while ((drive = drive->next) != best);
- }
- }
- return best;
-}
+ spin_unlock_irq(q->queue_lock);
-/*
- * Issue a new request to a drive from hwgroup
- * Caller must have already done spin_lock_irqsave(&ide_lock, ..);
- *
- * A hwgroup is a serialized group of IDE interfaces. Usually there is
- * exactly one hwif (interface) per hwgroup, but buggy controllers (eg. CMD640)
- * may have both interfaces in a single hwgroup to "serialize" access.
- * Or possibly multiple ISA interfaces can share a common IRQ by being grouped
- * together into one hwgroup for serialized access.
- *
- * Note also that several hwgroups can end up sharing a single IRQ,
- * possibly along with many other devices. This is especially common in
- * PCI-based systems with off-board IDE controller cards.
- *
- * The IDE driver uses the single global ide_lock spinlock to protect
- * access to the request queues, and to protect the hwgroup->busy flag.
- *
- * The first thread into the driver for a particular hwgroup sets the
- * hwgroup->busy flag to indicate that this hwgroup is now active,
- * and then initiates processing of the top request from the request queue.
- *
- * Other threads attempting entry notice the busy setting, and will simply
- * queue their new requests and exit immediately. Note that hwgroup->busy
- * remains set even when the driver is merely awaiting the next interrupt.
- * Thus, the meaning is "this hwgroup is busy processing a request".
- *
- * When processing of a request completes, the completing thread or IRQ-handler
- * will start the next request from the queue. If no more work remains,
- * the driver will clear the hwgroup->busy flag and exit.
- *
- * The ide_lock (spinlock) is used to protect all access to the
- * hwgroup->busy flag, but is otherwise not needed for most processing in
- * the driver. This makes the driver much more friendlier to shared IRQs
- * than previous designs, while remaining 100% (?) SMP safe and capable.
- */
-static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
-{
- ide_drive_t *drive;
- ide_hwif_t *hwif;
- struct request *rq;
- ide_startstop_t startstop;
- int loops = 0;
-
- /* for atari only: POSSIBLY BROKEN HERE(?) */
- ide_get_lock(ide_intr, hwgroup);
-
- /* caller must own ide_lock */
- BUG_ON(!irqs_disabled());
-
- while (!hwgroup->busy) {
- hwgroup->busy = 1;
- drive = choose_drive(hwgroup);
- if (drive == NULL) {
- int sleeping = 0;
- unsigned long sleep = 0; /* shut up, gcc */
- hwgroup->rq = NULL;
- drive = hwgroup->drive;
- do {
- if (drive->sleeping && (!sleeping || time_before(drive->sleep, sleep))) {
- sleeping = 1;
- sleep = drive->sleep;
- }
- } while ((drive = drive->next) != hwgroup->drive);
- if (sleeping) {
- /*
- * Take a short snooze, and then wake up this hwgroup again.
- * This gives other hwgroups on the same a chance to
- * play fairly with us, just in case there are big differences
- * in relative throughputs.. don't want to hog the cpu too much.
- */
- if (time_before(sleep, jiffies + WAIT_MIN_SLEEP))
- sleep = jiffies + WAIT_MIN_SLEEP;
-#if 1
- if (timer_pending(&hwgroup->timer))
- printk(KERN_CRIT "ide_set_handler: timer already active\n");
-#endif
- /* so that ide_timer_expiry knows what to do */
- hwgroup->sleeping = 1;
- hwgroup->req_gen_timer = hwgroup->req_gen;
- mod_timer(&hwgroup->timer, sleep);
- /* we purposely leave hwgroup->busy==1
- * while sleeping */
- } else {
- /* Ugly, but how can we sleep for the lock
- * otherwise? perhaps from tq_disk?
- */
-
- /* for atari only */
- ide_release_lock();
- hwgroup->busy = 0;
- }
+ if (ide_lock_host(host, hwif))
+ goto plug_device_2;
- /* no more work for this hwgroup (for now) */
- return;
+ spin_lock_irq(&hwif->lock);
+
+ if (!ide_lock_port(hwif)) {
+ ide_hwif_t *prev_port;
+repeat:
+ prev_port = hwif->host->cur_port;
+ hwif->rq = NULL;
+
+ if (drive->dev_flags & IDE_DFLAG_SLEEPING) {
+ if (time_before(drive->sleep, jiffies)) {
+ ide_unlock_port(hwif);
+ goto plug_device;
+ }
}
- again:
- hwif = HWIF(drive);
- if (hwgroup->hwif->sharing_irq && hwif != hwgroup->hwif) {
+
+ if ((hwif->host->host_flags & IDE_HFLAG_SERIALIZE) &&
+ hwif != prev_port) {
/*
- * set nIEN for previous hwif, drives in the
+ * set nIEN for previous port, drives in the
* quirk_list may not like intr setups/cleanups
*/
- if (drive->quirk_list != 1)
- ide_set_irq(drive, 0);
- }
- hwgroup->hwif = hwif;
- hwgroup->drive = drive;
- drive->sleeping = 0;
- drive->service_start = jiffies;
+ if (prev_port && prev_port->cur_dev->quirk_list == 0)
+ prev_port->tp_ops->set_irq(prev_port, 0);
- if (blk_queue_plugged(drive->queue)) {
- printk(KERN_ERR "ide: huh? queue was plugged!\n");
- break;
+ hwif->host->cur_port = hwif;
}
+ hwif->cur_dev = drive;
+ drive->dev_flags &= ~(IDE_DFLAG_SLEEPING | IDE_DFLAG_PARKED);
+ spin_unlock_irq(&hwif->lock);
+ spin_lock_irq(q->queue_lock);
/*
* we know that the queue isn't empty, but this can happen
* if the q->prep_rq_fn() decides to kill a request
*/
rq = elv_next_request(drive->queue);
+ spin_unlock_irq(q->queue_lock);
+ spin_lock_irq(&hwif->lock);
+
if (!rq) {
- hwgroup->busy = 0;
- break;
+ ide_unlock_port(hwif);
+ goto out;
}
/*
* though. I hope that doesn't happen too much, hopefully not
* unless the subdriver triggers such a thing in its own PM
* state machine.
- *
- * We count how many times we loop here to make sure we service
- * all drives in the hwgroup without looping for ever
*/
- if (drive->blocked && !blk_pm_request(rq) && !(rq->cmd_flags & REQ_PREEMPT)) {
- drive = drive->next ? drive->next : hwgroup->drive;
- if (loops++ < 4 && !blk_queue_plugged(drive->queue))
- goto again;
- /* We clear busy, there should be no pending ATA command at this point. */
- hwgroup->busy = 0;
- break;
+ if ((drive->dev_flags & IDE_DFLAG_BLOCKED) &&
+ blk_pm_request(rq) == 0 &&
+ (rq->cmd_flags & REQ_PREEMPT) == 0) {
+ /* there should be no pending command at this point */
+ ide_unlock_port(hwif);
+ goto plug_device;
}
- hwgroup->rq = rq;
+ hwif->rq = rq;
- /*
- * Some systems have trouble with IDE IRQs arriving while
- * the driver is still setting things up. So, here we disable
- * the IRQ used by this interface while the request is being started.
- * This may look bad at first, but pretty much the same thing
- * happens anyway when any interrupt comes in, IDE or otherwise
- * -- the kernel masks the IRQ while it is being handled.
- */
- if (masked_irq != IDE_NO_IRQ && hwif->irq != masked_irq)
- disable_irq_nosync(hwif->irq);
- spin_unlock(&ide_lock);
- local_irq_enable_in_hardirq();
- /* allow other IRQs while we start this request */
+ spin_unlock_irq(&hwif->lock);
startstop = start_request(drive, rq);
- spin_lock_irq(&ide_lock);
- if (masked_irq != IDE_NO_IRQ && hwif->irq != masked_irq)
- enable_irq(hwif->irq);
- if (startstop == ide_stopped)
- hwgroup->busy = 0;
- }
-}
+ spin_lock_irq(&hwif->lock);
-/*
- * Passes the stuff to ide_do_request
- */
-void do_ide_request(struct request_queue *q)
-{
- ide_drive_t *drive = q->queuedata;
-
- ide_do_request(HWGROUP(drive), IDE_NO_IRQ);
+ if (startstop == ide_stopped)
+ goto repeat;
+ } else
+ goto plug_device;
+out:
+ spin_unlock_irq(&hwif->lock);
+ if (rq == NULL)
+ ide_unlock_host(host);
+ spin_lock_irq(q->queue_lock);
+ return;
+
+plug_device:
+ spin_unlock_irq(&hwif->lock);
+ ide_unlock_host(host);
+plug_device_2:
+ spin_lock_irq(q->queue_lock);
+
+ if (!elv_queue_empty(q))
+ blk_plug_device(q);
}
/*
- * un-busy the hwgroup etc, and clear any pending DMA status. we want to
+ * un-busy the port etc, and clear any pending DMA status. we want to
* retry the current request in pio mode instead of risking tossing it
* all away
*/
static ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
{
- ide_hwif_t *hwif = HWIF(drive);
+ ide_hwif_t *hwif = drive->hwif;
struct request *rq;
ide_startstop_t ret = ide_stopped;
printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
(void)hwif->dma_ops->dma_end(drive);
ret = ide_error(drive, "dma timeout error",
- ide_read_status(drive));
+ hwif->tp_ops->read_status(hwif));
} else {
printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name);
hwif->dma_ops->dma_timeout(drive);
* a timeout -- we'll reenable after we finish this next request
* (or rather the first chunk of it) in pio.
*/
+ drive->dev_flags |= IDE_DFLAG_DMA_PIO_RETRY;
drive->retry_pio++;
- drive->state = DMA_PIO_RETRY;
ide_dma_off_quietly(drive);
/*
- * un-busy drive etc (hwgroup->busy is cleared on return) and
- * make sure request is sane
+ * un-busy drive etc and make sure request is sane
*/
- rq = HWGROUP(drive)->rq;
+ rq = hwif->rq;
if (!rq)
goto out;
- HWGROUP(drive)->rq = NULL;
+ hwif->rq = NULL;
rq->errors = 0;
return ret;
}
+static void ide_plug_device(ide_drive_t *drive)
+{
+ struct request_queue *q = drive->queue;
+ unsigned long flags;
+
+ spin_lock_irqsave(q->queue_lock, flags);
+ if (!elv_queue_empty(q))
+ blk_plug_device(q);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+}
+
/**
* ide_timer_expiry - handle lack of an IDE interrupt
- * @data: timer callback magic (hwgroup)
+ * @data: timer callback magic (hwif)
*
* An IDE command has timed out before the expected drive return
* occurred. At this point we attempt to clean up the current
void ide_timer_expiry (unsigned long data)
{
- ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data;
+ ide_hwif_t *hwif = (ide_hwif_t *)data;
+ ide_drive_t *uninitialized_var(drive);
ide_handler_t *handler;
- ide_expiry_t *expiry;
unsigned long flags;
- unsigned long wait = -1;
+ int wait = -1;
+ int plug_device = 0;
+
+ spin_lock_irqsave(&hwif->lock, flags);
- spin_lock_irqsave(&ide_lock, flags);
+ handler = hwif->handler;
- if (((handler = hwgroup->handler) == NULL) ||
- (hwgroup->req_gen != hwgroup->req_gen_timer)) {
+ if (handler == NULL || hwif->req_gen != hwif->req_gen_timer) {
/*
* Either a marginal timeout occurred
* (got the interrupt just as timer expired),
* or we were "sleeping" to give other devices a chance.
* Either way, we don't really want to complain about anything.
*/
- if (hwgroup->sleeping) {
- hwgroup->sleeping = 0;
- hwgroup->busy = 0;
- }
} else {
- ide_drive_t *drive = hwgroup->drive;
- if (!drive) {
- printk(KERN_ERR "ide_timer_expiry: hwgroup->drive was NULL\n");
- hwgroup->handler = NULL;
- } else {
- ide_hwif_t *hwif;
- ide_startstop_t startstop = ide_stopped;
- if (!hwgroup->busy) {
- hwgroup->busy = 1; /* paranoia */
- printk(KERN_ERR "%s: ide_timer_expiry: hwgroup->busy was 0 ??\n", drive->name);
+ ide_expiry_t *expiry = hwif->expiry;
+ ide_startstop_t startstop = ide_stopped;
+
+ drive = hwif->cur_dev;
+
+ if (expiry) {
+ wait = expiry(drive);
+ if (wait > 0) { /* continue */
+ /* reset timer */
+ hwif->timer.expires = jiffies + wait;
+ hwif->req_gen_timer = hwif->req_gen;
+ add_timer(&hwif->timer);
+ spin_unlock_irqrestore(&hwif->lock, flags);
+ return;
}
- if ((expiry = hwgroup->expiry) != NULL) {
- /* continue */
- if ((wait = expiry(drive)) > 0) {
- /* reset timer */
- hwgroup->timer.expires = jiffies + wait;
- hwgroup->req_gen_timer = hwgroup->req_gen;
- add_timer(&hwgroup->timer);
- spin_unlock_irqrestore(&ide_lock, flags);
- return;
- }
- }
- hwgroup->handler = NULL;
- /*
- * We need to simulate a real interrupt when invoking
- * the handler() function, which means we need to
- * globally mask the specific IRQ:
- */
- spin_unlock(&ide_lock);
- hwif = HWIF(drive);
- /* disable_irq_nosync ?? */
- disable_irq(hwif->irq);
- /* local CPU only,
- * as if we were handling an interrupt */
- local_irq_disable();
- if (hwgroup->polling) {
- startstop = handler(drive);
- } else if (drive_is_ready(drive)) {
- if (drive->waiting_for_dma)
- hwif->dma_ops->dma_lost_irq(drive);
- (void)ide_ack_intr(hwif);
- printk(KERN_WARNING "%s: lost interrupt\n", drive->name);
- startstop = handler(drive);
- } else {
- if (drive->waiting_for_dma) {
- startstop = ide_dma_timeout_retry(drive, wait);
- } else
- startstop =
- ide_error(drive, "irq timeout",
- ide_read_status(drive));
- }
- drive->service_time = jiffies - drive->service_start;
- spin_lock_irq(&ide_lock);
- enable_irq(hwif->irq);
- if (startstop == ide_stopped)
- hwgroup->busy = 0;
+ }
+ hwif->handler = NULL;
+ /*
+ * We need to simulate a real interrupt when invoking
+ * the handler() function, which means we need to
+ * globally mask the specific IRQ:
+ */
+ spin_unlock(&hwif->lock);
+ /* disable_irq_nosync ?? */
+ disable_irq(hwif->irq);
+ /* local CPU only, as if we were handling an interrupt */
+ local_irq_disable();
+ if (hwif->polling) {
+ startstop = handler(drive);
+ } else if (drive_is_ready(drive)) {
+ if (drive->waiting_for_dma)
+ hwif->dma_ops->dma_lost_irq(drive);
+ (void)ide_ack_intr(hwif);
+ printk(KERN_WARNING "%s: lost interrupt\n",
+ drive->name);
+ startstop = handler(drive);
+ } else {
+ if (drive->waiting_for_dma)
+ startstop = ide_dma_timeout_retry(drive, wait);
+ else
+ startstop = ide_error(drive, "irq timeout",
+ hwif->tp_ops->read_status(hwif));
+ }
+ spin_lock_irq(&hwif->lock);
+ enable_irq(hwif->irq);
+ if (startstop == ide_stopped) {
+ ide_unlock_port(hwif);
+ plug_device = 1;
}
}
- ide_do_request(hwgroup, IDE_NO_IRQ);
- spin_unlock_irqrestore(&ide_lock, flags);
+ spin_unlock_irqrestore(&hwif->lock, flags);
+
+ if (plug_device) {
+ ide_unlock_host(hwif->host);
+ ide_plug_device(drive);
+ }
}
/**
* unexpected_intr - handle an unexpected IDE interrupt
* @irq: interrupt line
- * @hwgroup: hwgroup being processed
+ * @hwif: port being processed
*
* There's nothing really useful we can do with an unexpected interrupt,
* other than reading the status register (to clear it), and logging it.
* before completing the issuance of any new drive command, so we will not
* be accidentally invoked as a result of any valid command completion
* interrupt.
- *
- * Note that we must walk the entire hwgroup here. We know which hwif
- * is doing the current command, but we don't know which hwif burped
- * mysteriously.
*/
-
-static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup)
-{
- u8 stat;
- ide_hwif_t *hwif = hwgroup->hwif;
- /*
- * handle the unexpected interrupt
- */
- do {
- if (hwif->irq == irq) {
- stat = hwif->INB(hwif->io_ports.status_addr);
- if (!OK_STAT(stat, READY_STAT, BAD_STAT)) {
- /* Try to not flood the console with msgs */
- static unsigned long last_msgtime, count;
- ++count;
- if (time_after(jiffies, last_msgtime + HZ)) {
- last_msgtime = jiffies;
- printk(KERN_ERR "%s%s: unexpected interrupt, "
- "status=0x%02x, count=%ld\n",
- hwif->name,
- (hwif->next==hwgroup->hwif) ? "" : "(?)", stat, count);
- }
- }
+static void unexpected_intr(int irq, ide_hwif_t *hwif)
+{
+ u8 stat = hwif->tp_ops->read_status(hwif);
+
+ if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
+ /* Try to not flood the console with msgs */
+ static unsigned long last_msgtime, count;
+ ++count;
+
+ if (time_after(jiffies, last_msgtime + HZ)) {
+ last_msgtime = jiffies;
+ printk(KERN_ERR "%s: unexpected interrupt, "
+ "status=0x%02x, count=%ld\n",
+ hwif->name, stat, count);
}
- } while ((hwif = hwif->next) != hwgroup->hwif);
+ }
}
/**
* ide_intr - default IDE interrupt handler
* @irq: interrupt number
- * @dev_id: hwif group
+ * @dev_id: hwif
* @regs: unused weirdness from the kernel irq layer
*
* This is the default IRQ handler for the IDE layer. You should
* not need to override it. If you do be aware it is subtle in
* places
*
- * hwgroup->hwif is the interface in the group currently performing
- * a command. hwgroup->drive is the drive and hwgroup->handler is
+ * hwif is the interface in the group currently performing
+ * a command. hwif->cur_dev is the drive and hwif->handler is
* the IRQ handler to call. As we issue a command the handlers
* step through multiple states, reassigning the handler to the
* next step in the process. Unlike a smart SCSI controller IDE
*
* The handler eventually returns ide_stopped to indicate the
* request completed. At this point we issue the next request
- * on the hwgroup and the process begins again.
+ * on the port and the process begins again.
*/
-
+
irqreturn_t ide_intr (int irq, void *dev_id)
{
- unsigned long flags;
- ide_hwgroup_t *hwgroup = (ide_hwgroup_t *)dev_id;
- ide_hwif_t *hwif;
- ide_drive_t *drive;
+ ide_hwif_t *hwif = (ide_hwif_t *)dev_id;
+ ide_drive_t *uninitialized_var(drive);
ide_handler_t *handler;
+ unsigned long flags;
ide_startstop_t startstop;
+ irqreturn_t irq_ret = IRQ_NONE;
+ int plug_device = 0;
- spin_lock_irqsave(&ide_lock, flags);
- hwif = hwgroup->hwif;
-
- if (!ide_ack_intr(hwif)) {
- spin_unlock_irqrestore(&ide_lock, flags);
- return IRQ_NONE;
+ if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) {
+ if (hwif != hwif->host->cur_port)
+ goto out_early;
}
- if ((handler = hwgroup->handler) == NULL || hwgroup->polling) {
+ spin_lock_irqsave(&hwif->lock, flags);
+
+ if (!ide_ack_intr(hwif))
+ goto out;
+
+ handler = hwif->handler;
+
+ if (handler == NULL || hwif->polling) {
/*
* Not expecting an interrupt from this drive.
* That means this could be:
* Probably not a shared PCI interrupt,
* so we can safely try to do something about it:
*/
- unexpected_intr(irq, hwgroup);
+ unexpected_intr(irq, hwif);
#ifdef CONFIG_BLK_DEV_IDEPCI
} else {
/*
* Whack the status register, just in case
* we have a leftover pending IRQ.
*/
- (void) hwif->INB(hwif->io_ports.status_addr);
+ (void)hwif->tp_ops->read_status(hwif);
#endif /* CONFIG_BLK_DEV_IDEPCI */
}
- spin_unlock_irqrestore(&ide_lock, flags);
- return IRQ_NONE;
- }
- drive = hwgroup->drive;
- if (!drive) {
- /*
- * This should NEVER happen, and there isn't much
- * we could do about it here.
- *
- * [Note - this can occur if the drive is hot unplugged]
- */
- spin_unlock_irqrestore(&ide_lock, flags);
- return IRQ_HANDLED;
+ goto out;
}
- if (!drive_is_ready(drive)) {
+
+ drive = hwif->cur_dev;
+
+ if (!drive_is_ready(drive))
/*
* This happens regularly when we share a PCI IRQ with
* another device. Unfortunately, it can also happen
* their status register is up to date. Hopefully we have
* enough advance overhead that the latter isn't a problem.
*/
- spin_unlock_irqrestore(&ide_lock, flags);
- return IRQ_NONE;
- }
- if (!hwgroup->busy) {
- hwgroup->busy = 1; /* paranoia */
- printk(KERN_ERR "%s: ide_intr: hwgroup->busy was 0 ??\n", drive->name);
- }
- hwgroup->handler = NULL;
- hwgroup->req_gen++;
- del_timer(&hwgroup->timer);
- spin_unlock(&ide_lock);
-
- /* Some controllers might set DMA INTR no matter DMA or PIO;
- * bmdma status might need to be cleared even for
- * PIO interrupts to prevent spurious/lost irq.
- */
- if (hwif->ide_dma_clear_irq && !(drive->waiting_for_dma))
- /* ide_dma_end() needs bmdma status for error checking.
- * So, skip clearing bmdma status here and leave it
- * to ide_dma_end() if this is dma interrupt.
- */
- hwif->ide_dma_clear_irq(drive);
+ goto out;
+
+ hwif->handler = NULL;
+ hwif->req_gen++;
+ del_timer(&hwif->timer);
+ spin_unlock(&hwif->lock);
+
+ if (hwif->port_ops && hwif->port_ops->clear_irq)
+ hwif->port_ops->clear_irq(drive);
- if (drive->unmask)
+ if (drive->dev_flags & IDE_DFLAG_UNMASK)
local_irq_enable_in_hardirq();
+
/* service this interrupt, may set handler for next interrupt */
startstop = handler(drive);
- spin_lock_irq(&ide_lock);
+ spin_lock_irq(&hwif->lock);
/*
* Note that handler() may have set things up for another
* interrupt to occur soon, but it cannot happen until
* same irq as is currently being serviced here, and Linux
* won't allow another of the same (on any CPU) until we return.
*/
- drive->service_time = jiffies - drive->service_start;
if (startstop == ide_stopped) {
- if (hwgroup->handler == NULL) { /* paranoia */
- hwgroup->busy = 0;
- ide_do_request(hwgroup, hwif->irq);
- } else {
- printk(KERN_ERR "%s: ide_intr: huh? expected NULL handler "
- "on exit\n", drive->name);
- }
+ BUG_ON(hwif->handler);
+ ide_unlock_port(hwif);
+ plug_device = 1;
+ }
+ irq_ret = IRQ_HANDLED;
+out:
+ spin_unlock_irqrestore(&hwif->lock, flags);
+out_early:
+ if (plug_device) {
+ ide_unlock_host(hwif->host);
+ ide_plug_device(drive);
}
- spin_unlock_irqrestore(&ide_lock, flags);
- return IRQ_HANDLED;
+
+ return irq_ret;
}
+EXPORT_SYMBOL_GPL(ide_intr);
/**
* ide_do_drive_cmd - issue IDE special command
void ide_do_drive_cmd(ide_drive_t *drive, struct request *rq)
{
+ struct request_queue *q = drive->queue;
unsigned long flags;
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- spin_lock_irqsave(&ide_lock, flags);
- hwgroup->rq = NULL;
- __elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 1);
- __generic_unplug_device(drive->queue);
- spin_unlock_irqrestore(&ide_lock, flags);
-}
+ drive->hwif->rq = NULL;
+ spin_lock_irqsave(q->queue_lock, flags);
+ __elv_add_request(q, rq, ELEVATOR_INSERT_FRONT, 0);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+}
EXPORT_SYMBOL(ide_do_drive_cmd);
void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma)
{
+ ide_hwif_t *hwif = drive->hwif;
ide_task_t task;
memset(&task, 0, sizeof(task));
task.tf.lbah = (bcount >> 8) & 0xff;
ide_tf_dump(drive->name, &task.tf);
- ide_set_irq(drive, 1);
+ hwif->tp_ops->set_irq(hwif, 1);
SELECT_MASK(drive, 0);
- drive->hwif->tf_load(drive, &task);
+ hwif->tp_ops->tf_load(drive, &task);
}
EXPORT_SYMBOL_GPL(ide_pktcmd_tf_load);
while (len > 0) {
if (write)
- hwif->output_data(drive, NULL, buf, min(4, len));
+ hwif->tp_ops->output_data(drive, NULL, buf, min(4, len));
else
- hwif->input_data(drive, NULL, buf, min(4, len));
+ hwif->tp_ops->input_data(drive, NULL, buf, min(4, len));
len -= 4;
}
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff