X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fide%2Fide-io.c;h=f8d8642903daf1f2569055c9a80386f7d88513c9;hb=0d346ba0730d84f04022f9f984d3f606f69cef37;hp=a896a283f27fdd04d7e211c2c2d81b3924d8bd9f;hpb=8d7ccaa545490cdffdfaff0842436a8dd85cf47b;p=linux-2.6-omap-h63xx.git diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index a896a283f27..f8d8642903d 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #include #include @@ -77,8 +78,9 @@ static int __ide_end_request(ide_drive_t *drive, struct request *rq, * 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); } @@ -130,21 +132,6 @@ int ide_end_request (ide_drive_t *drive, int uptodate, int nr_sectors) } 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; @@ -153,20 +140,20 @@ static void ide_complete_power_step(ide_drive_t *drive, struct request *rq, u8 s return; switch (pm->pm_step) { - case ide_pm_flush_cache: /* Suspend step 1 (flush cache) complete */ + case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */ if (pm->pm_state == PM_EVENT_FREEZE) - pm->pm_step = ide_pm_state_completed; + pm->pm_step = IDE_PM_COMPLETED; else - pm->pm_step = idedisk_pm_standby; + pm->pm_step = IDE_PM_STANDBY; break; - case idedisk_pm_standby: /* Suspend step 2 (standby) complete */ - pm->pm_step = ide_pm_state_completed; + case IDE_PM_STANDBY: /* Suspend step 2 (standby) */ + pm->pm_step = IDE_PM_COMPLETED; break; - case idedisk_pm_restore_pio: /* Resume step 1 complete */ - pm->pm_step = idedisk_pm_idle; + case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */ + pm->pm_step = IDE_PM_IDLE; break; - case idedisk_pm_idle: /* Resume step 2 (idle) complete */ - pm->pm_step = ide_pm_restore_dma; + case IDE_PM_IDLE: /* Resume step 2 (idle)*/ + pm->pm_step = IDE_PM_RESTORE_DMA; break; } } @@ -179,40 +166,37 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request * memset(args, 0, sizeof(*args)); switch (pm->pm_step) { - case ide_pm_flush_cache: /* Suspend step 1 (flush cache) */ + 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)) { + if (ata_id_flush_enabled(drive->id) == 0 || + (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) { 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; + if (ata_id_flush_ext_enabled(drive->id)) + args->tf.command = ATA_CMD_FLUSH_EXT; else - args->tf.command = WIN_FLUSH_CACHE; + args->tf.command = ATA_CMD_FLUSH; goto out_do_tf; - - case idedisk_pm_standby: /* Suspend step 2 (standby) */ - args->tf.command = WIN_STANDBYNOW1; + case IDE_PM_STANDBY: /* Suspend step 2 (standby) */ + args->tf.command = ATA_CMD_STANDBYNOW1; goto out_do_tf; - - case idedisk_pm_restore_pio: /* Resume step 1 (restore PIO) */ + case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */ ide_set_max_pio(drive); /* - * skip idedisk_pm_idle for ATAPI devices + * skip IDE_PM_IDLE for ATAPI devices */ if (drive->media != ide_disk) - pm->pm_step = ide_pm_restore_dma; + 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; + case IDE_PM_IDLE: /* Resume step 2 (idle) */ + args->tf.command = ATA_CMD_IDLEIMMEDIATE; goto out_do_tf; - - case ide_pm_restore_dma: /* Resume step 3 (restore DMA) */ + 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 @@ -221,12 +205,13 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request * if (drive->hwif->dma_ops == NULL) break; /* - * TODO: respect ->using_dma setting + * TODO: respect IDE_DFLAG_USING_DMA */ ide_set_dma(drive); break; } - pm->pm_step = ide_pm_state_completed; + + pm->pm_step = IDE_PM_COMPLETED; return ide_stopped; out_do_tf: @@ -286,7 +271,7 @@ static void ide_complete_pm_request (ide_drive_t *drive, struct request *rq) if (blk_pm_suspend_request(rq)) { blk_stop_queue(drive->queue); } else { - drive->blocked = 0; + drive->dev_flags &= ~IDE_DFLAG_BLOCKED; blk_start_queue(drive->queue); } HWGROUP(drive)->rq = NULL; @@ -322,7 +307,7 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err) ide_task_t *task = (ide_task_t *)rq->special; if (rq->errors == 0) - rq->errors = !OK_STAT(stat, READY_STAT, BAD_STAT); + rq->errors = !OK_STAT(stat, ATA_DRDY, BAD_STAT); if (task) { struct ide_taskfile *tf = &task->tf; @@ -342,7 +327,7 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err) 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) + if (pm->pm_step == IDE_PM_COMPLETED) ide_complete_pm_request(drive, rq); return; } @@ -373,29 +358,30 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8 { 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->tp_ops->read_status(hwif) == 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; @@ -407,7 +393,7 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8 return ide_stopped; } - if (hwif->tp_ops->read_status(hwif) & (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) { @@ -427,16 +413,17 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, u { 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 (hwif->tp_ops->read_status(hwif) & (BUSY_STAT | DRQ_STAT)) + if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) /* force an abort */ - hwif->tp_ops->exec_command(hwif, WIN_IDLEIMMEDIATE); + hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE); if (rq->errors >= ERROR_MAX) { ide_kill_rq(drive, rq); @@ -508,20 +495,20 @@ static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf) 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.all; + 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) @@ -540,8 +527,6 @@ 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; @@ -586,9 +571,10 @@ static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio) * 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) @@ -607,7 +593,7 @@ static ide_startstop_t do_special (ide_drive_t *drive) if (set_pio_mode_abuse(drive->hwif, req_pio)) { /* - * take ide_lock for drive->[no_]unmask/[no_]io_32bit + * take ide_lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */ if (req_pio == 8 || req_pio == 9) { unsigned long flags; @@ -618,7 +604,8 @@ static ide_startstop_t do_special (ide_drive_t *drive) } else port_ops->set_pio_mode(drive, req_pio); } else { - int keep_dma = drive->using_dma; + int keep_dma = + !!(drive->dev_flags & IDE_DFLAG_USING_DMA); ide_set_pio(drive, req_pio); @@ -716,9 +703,49 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *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_KERNEL); + if (!rq) + return -ENOMEM; + + 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]) { + 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: @@ -733,11 +760,11 @@ 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) + pm->pm_step == IDE_PM_START_SUSPEND) /* Mark drive blocked when starting the suspend sequence. */ - drive->blocked = 1; + drive->dev_flags |= IDE_DFLAG_BLOCKED; else if (blk_pm_resume_request(rq) && - pm->pm_step == ide_pm_state_start_resume) { + pm->pm_step == IDE_PM_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 @@ -766,9 +793,7 @@ static void ide_check_pm_state(ide_drive_t *drive, struct request *rq) * 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 */ @@ -776,7 +801,6 @@ static void ide_check_pm_state(ide_drive_t *drive, struct request *rq) 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)); @@ -791,21 +815,12 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq) 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; } @@ -829,7 +844,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq) #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)) @@ -844,7 +859,8 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq) return ide_special_rq(drive, rq); drv = *(ide_driver_t **)rq->rq_disk->private_data; - return drv->do_request(drive, rq, block); + + return drv->do_request(drive, rq, rq->sector); } return do_special(drive); kill_rq: @@ -866,7 +882,7 @@ 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); @@ -906,18 +922,23 @@ repeat: } 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)))) - { + u8 dev_s = !!(drive->dev_flags & IDE_DFLAG_SLEEPING); + u8 best_s = (best && !!(best->dev_flags & IDE_DFLAG_SLEEPING)); + + if ((dev_s == 0 || time_after_eq(jiffies, drive->sleep)) && + !elv_queue_empty(drive->queue)) { + if (best == NULL || + (dev_s && (best_s == 0 || time_before(drive->sleep, best->sleep))) || + (best_s == 0 && 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) { + + if (best && (best->dev_flags & IDE_DFLAG_NICE1) && + (best->dev_flags & IDE_DFLAG_SLEEPING) == 0 && + best != hwgroup->drive && best->service_time > WAIT_MIN_SLEEP) { long t = (signed long)(WAKEUP(best) - jiffies); if (t >= WAIT_MIN_SLEEP) { /* @@ -926,7 +947,7 @@ repeat: */ drive = best->next; do { - if (!drive->sleeping + if ((drive->dev_flags & IDE_DFLAG_SLEEPING) == 0 && time_before(jiffies - best->service_time, WAKEUP(drive)) && time_before(WAKEUP(drive), jiffies + t)) { @@ -997,7 +1018,9 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq) hwgroup->rq = NULL; drive = hwgroup->drive; do { - if (drive->sleeping && (!sleeping || time_before(drive->sleep, sleep))) { + if ((drive->dev_flags & IDE_DFLAG_SLEEPING) && + (sleeping == 0 || + time_before(drive->sleep, sleep))) { sleeping = 1; sleep = drive->sleep; } @@ -1046,7 +1069,7 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq) } hwgroup->hwif = hwif; hwgroup->drive = drive; - drive->sleeping = 0; + drive->dev_flags &= ~IDE_DFLAG_SLEEPING; drive->service_start = jiffies; if (blk_queue_plugged(drive->queue)) { @@ -1080,7 +1103,9 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq) * 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)) { + if ((drive->dev_flags & IDE_DFLAG_BLOCKED) && + blk_pm_request(rq) == 0 && + (rq->cmd_flags & REQ_PREEMPT) == 0) { drive = drive->next ? drive->next : hwgroup->drive; if (loops++ < 4 && !blk_queue_plugged(drive->queue)) goto again; @@ -1153,8 +1178,8 @@ static ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error) * 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); /* @@ -1325,7 +1350,7 @@ static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup) if (hwif->irq == irq) { stat = hwif->tp_ops->read_status(hwif); - if (!OK_STAT(stat, READY_STAT, BAD_STAT)) { + if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) { /* Try to not flood the console with msgs */ static unsigned long last_msgtime, count; ++count; @@ -1462,7 +1487,7 @@ irqreturn_t ide_intr (int irq, void *dev_id) */ hwif->ide_dma_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);