diff options
Diffstat (limited to 'drivers/ide/ide-iops.c')
-rw-r--r-- | drivers/ide/ide-iops.c | 254 |
1 files changed, 174 insertions, 80 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index 80ad4f234f3..07da5fb9eaf 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -42,18 +42,6 @@ static void ide_outb (u8 val, unsigned long port) outb(val, port); } -static void ide_outbsync(ide_hwif_t *hwif, u8 addr, unsigned long port) -{ - outb(addr, port); -} - -void default_hwif_iops (ide_hwif_t *hwif) -{ - hwif->OUTB = ide_outb; - hwif->OUTBSYNC = ide_outbsync; - hwif->INB = ide_inb; -} - /* * MMIO operations, typically used for SATA controllers */ @@ -68,31 +56,19 @@ static void ide_mm_outb (u8 value, unsigned long port) writeb(value, (void __iomem *) port); } -static void ide_mm_outbsync(ide_hwif_t *hwif, u8 value, unsigned long port) -{ - writeb(value, (void __iomem *) port); -} - -void default_hwif_mmiops (ide_hwif_t *hwif) -{ - hwif->OUTB = ide_mm_outb; - /* Most systems will need to override OUTBSYNC, alas however - this one is controller specific! */ - hwif->OUTBSYNC = ide_mm_outbsync; - hwif->INB = ide_mm_inb; -} - -EXPORT_SYMBOL(default_hwif_mmiops); - void SELECT_DRIVE (ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; const struct ide_port_ops *port_ops = hwif->port_ops; + ide_task_t task; if (port_ops && port_ops->selectproc) port_ops->selectproc(drive); - hwif->OUTB(drive->select.all, hwif->io_ports.device_addr); + memset(&task, 0, sizeof(task)); + task.tf_flags = IDE_TFLAG_OUT_DEVICE; + + drive->hwif->tp_ops->tf_load(drive, &task); } void SELECT_MASK(ide_drive_t *drive, int mask) @@ -103,7 +79,61 @@ void SELECT_MASK(ide_drive_t *drive, int mask) port_ops->maskproc(drive, mask); } -static void ide_tf_load(ide_drive_t *drive, ide_task_t *task) +void ide_exec_command(ide_hwif_t *hwif, u8 cmd) +{ + if (hwif->host_flags & IDE_HFLAG_MMIO) + writeb(cmd, (void __iomem *)hwif->io_ports.command_addr); + else + outb(cmd, hwif->io_ports.command_addr); +} +EXPORT_SYMBOL_GPL(ide_exec_command); + +u8 ide_read_status(ide_hwif_t *hwif) +{ + if (hwif->host_flags & IDE_HFLAG_MMIO) + return readb((void __iomem *)hwif->io_ports.status_addr); + else + return inb(hwif->io_ports.status_addr); +} +EXPORT_SYMBOL_GPL(ide_read_status); + +u8 ide_read_altstatus(ide_hwif_t *hwif) +{ + if (hwif->host_flags & IDE_HFLAG_MMIO) + return readb((void __iomem *)hwif->io_ports.ctl_addr); + else + return inb(hwif->io_ports.ctl_addr); +} +EXPORT_SYMBOL_GPL(ide_read_altstatus); + +u8 ide_read_sff_dma_status(ide_hwif_t *hwif) +{ + if (hwif->host_flags & IDE_HFLAG_MMIO) + return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS)); + else + return inb(hwif->dma_base + ATA_DMA_STATUS); +} +EXPORT_SYMBOL_GPL(ide_read_sff_dma_status); + +void ide_set_irq(ide_hwif_t *hwif, int on) +{ + u8 ctl = ATA_DEVCTL_OBS; + + if (on == 4) { /* hack for SRST */ + ctl |= 4; + on &= ~4; + } + + ctl |= on ? 0 : 2; + + if (hwif->host_flags & IDE_HFLAG_MMIO) + writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr); + else + outb(ctl, hwif->io_ports.ctl_addr); +} +EXPORT_SYMBOL_GPL(ide_set_irq); + +void ide_tf_load(ide_drive_t *drive, ide_task_t *task) { ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; @@ -155,8 +185,9 @@ static void ide_tf_load(ide_drive_t *drive, ide_task_t *task) tf_outb((tf->device & HIHI) | drive->select.all, io_ports->device_addr); } +EXPORT_SYMBOL_GPL(ide_tf_load); -static void ide_tf_read(ide_drive_t *drive, ide_task_t *task) +void ide_tf_read(ide_drive_t *drive, ide_task_t *task) { ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; @@ -188,6 +219,8 @@ static void ide_tf_read(ide_drive_t *drive, ide_task_t *task) /* be sure we're looking at the low order bits */ tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); + if (task->tf_flags & IDE_TFLAG_IN_FEATURE) + tf->feature = tf_inb(io_ports->feature_addr); if (task->tf_flags & IDE_TFLAG_IN_NSECT) tf->nsect = tf_inb(io_ports->nsect_addr); if (task->tf_flags & IDE_TFLAG_IN_LBAL) @@ -214,6 +247,7 @@ static void ide_tf_read(ide_drive_t *drive, ide_task_t *task) tf->hob_lbah = tf_inb(io_ports->lbah_addr); } } +EXPORT_SYMBOL_GPL(ide_tf_read); /* * Some localbus EIDE interfaces require a special access sequence @@ -236,8 +270,8 @@ static void ata_vlb_sync(unsigned long port) * so if an odd len is specified, be sure that there's at least one * extra byte allocated for the buffer. */ -static void ata_input_data(ide_drive_t *drive, struct request *rq, - void *buf, unsigned int len) +void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf, + unsigned int len) { ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; @@ -277,12 +311,13 @@ static void ata_input_data(ide_drive_t *drive, struct request *rq, insw(data_addr, buf, len / 2); } } +EXPORT_SYMBOL_GPL(ide_input_data); /* * This is used for most PIO data transfers *to* the IDE interface */ -static void ata_output_data(ide_drive_t *drive, struct request *rq, - void *buf, unsigned int len) +void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf, + unsigned int len) { ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; @@ -320,15 +355,50 @@ static void ata_output_data(ide_drive_t *drive, struct request *rq, outsw(data_addr, buf, len / 2); } } +EXPORT_SYMBOL_GPL(ide_output_data); -void default_hwif_transport(ide_hwif_t *hwif) +u8 ide_read_error(ide_drive_t *drive) { - hwif->tf_load = ide_tf_load; - hwif->tf_read = ide_tf_read; + ide_task_t task; - hwif->input_data = ata_input_data; - hwif->output_data = ata_output_data; + memset(&task, 0, sizeof(task)); + task.tf_flags = IDE_TFLAG_IN_FEATURE; + + drive->hwif->tp_ops->tf_read(drive, &task); + + return task.tf.error; } +EXPORT_SYMBOL_GPL(ide_read_error); + +void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) +{ + ide_task_t task; + + memset(&task, 0, sizeof(task)); + task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | + IDE_TFLAG_IN_NSECT; + + drive->hwif->tp_ops->tf_read(drive, &task); + + *bcount = (task.tf.lbah << 8) | task.tf.lbam; + *ireason = task.tf.nsect & 3; +} +EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); + +const struct ide_tp_ops default_tp_ops = { + .exec_command = ide_exec_command, + .read_status = ide_read_status, + .read_altstatus = ide_read_altstatus, + .read_sff_dma_status = ide_read_sff_dma_status, + + .set_irq = ide_set_irq, + + .tf_load = ide_tf_load, + .tf_read = ide_tf_read, + + .input_data = ide_input_data, + .output_data = ide_output_data, +}; void ide_fix_driveid (struct hd_driveid *id) { @@ -483,10 +553,10 @@ int drive_is_ready (ide_drive_t *drive) * about possible isa-pnp and pci-pnp issues yet. */ if (hwif->io_ports.ctl_addr) - stat = ide_read_altstatus(drive); + stat = hwif->tp_ops->read_altstatus(hwif); else /* Note: this may clear a pending IRQ!! */ - stat = ide_read_status(drive); + stat = hwif->tp_ops->read_status(hwif); if (stat & BUSY_STAT) /* drive busy: definitely not interrupting */ @@ -511,24 +581,26 @@ EXPORT_SYMBOL(drive_is_ready); */ static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) { + ide_hwif_t *hwif = drive->hwif; + const struct ide_tp_ops *tp_ops = hwif->tp_ops; unsigned long flags; int i; u8 stat; udelay(1); /* spec allows drive 400ns to assert "BUSY" */ - stat = ide_read_status(drive); + stat = tp_ops->read_status(hwif); if (stat & BUSY_STAT) { local_irq_set(flags); timeout += jiffies; - while ((stat = ide_read_status(drive)) & BUSY_STAT) { + while ((stat = tp_ops->read_status(hwif)) & BUSY_STAT) { if (time_after(jiffies, timeout)) { /* * One last read after the timeout in case * heavy interrupt load made us not make any * progress during the timeout.. */ - stat = ide_read_status(drive); + stat = tp_ops->read_status(hwif); if (!(stat & BUSY_STAT)) break; @@ -548,7 +620,7 @@ static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long ti */ for (i = 0; i < 10; i++) { udelay(1); - stat = ide_read_status(drive); + stat = tp_ops->read_status(hwif); if (OK_STAT(stat, good, bad)) { *rstat = stat; @@ -674,6 +746,7 @@ no_80w: int ide_driveid_update(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; + const struct ide_tp_ops *tp_ops = hwif->tp_ops; struct hd_driveid *id; unsigned long timeout, flags; u8 stat; @@ -684,9 +757,9 @@ int ide_driveid_update(ide_drive_t *drive) */ SELECT_MASK(drive, 1); - ide_set_irq(drive, 0); + tp_ops->set_irq(hwif, 0); msleep(50); - hwif->OUTBSYNC(hwif, WIN_IDENTIFY, hwif->io_ports.command_addr); + tp_ops->exec_command(hwif, WIN_IDENTIFY); timeout = jiffies + WAIT_WORSTCASE; do { if (time_after(jiffies, timeout)) { @@ -695,11 +768,11 @@ int ide_driveid_update(ide_drive_t *drive) } msleep(50); /* give drive a breather */ - stat = ide_read_altstatus(drive); + stat = tp_ops->read_altstatus(hwif); } while (stat & BUSY_STAT); msleep(50); /* wait for IRQ and DRQ_STAT */ - stat = ide_read_status(drive); + stat = tp_ops->read_status(hwif); if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) { SELECT_MASK(drive, 0); @@ -713,8 +786,8 @@ int ide_driveid_update(ide_drive_t *drive) local_irq_restore(flags); return 0; } - hwif->input_data(drive, NULL, id, SECTOR_SIZE); - (void)ide_read_status(drive); /* clear drive IRQ */ + tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); + (void)tp_ops->read_status(hwif); /* clear drive IRQ */ local_irq_enable(); local_irq_restore(flags); ide_fix_driveid(id); @@ -735,9 +808,10 @@ int ide_driveid_update(ide_drive_t *drive) int ide_config_drive_speed(ide_drive_t *drive, u8 speed) { ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; + const struct ide_tp_ops *tp_ops = hwif->tp_ops; int error = 0; u8 stat; + ide_task_t task; #ifdef CONFIG_BLK_DEV_IDEDMA if (hwif->dma_ops) /* check if host supports DMA */ @@ -770,12 +844,19 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) SELECT_DRIVE(drive); SELECT_MASK(drive, 0); udelay(1); - ide_set_irq(drive, 0); - hwif->OUTB(speed, io_ports->nsect_addr); - hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr); - hwif->OUTBSYNC(hwif, WIN_SETFEATURES, io_ports->command_addr); + tp_ops->set_irq(hwif, 0); + + memset(&task, 0, sizeof(task)); + task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT; + task.tf.feature = SETFEATURES_XFER; + task.tf.nsect = speed; + + tp_ops->tf_load(drive, &task); + + tp_ops->exec_command(hwif, WIN_SETFEATURES); + if (drive->quirk_list == 2) - ide_set_irq(drive, 1); + tp_ops->set_irq(hwif, 1); error = __ide_wait_stat(drive, drive->ready_stat, BUSY_STAT|DRQ_STAT|ERR_STAT, @@ -796,8 +877,7 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) skip: #ifdef CONFIG_BLK_DEV_IDEDMA - if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) && - drive->using_dma) + if (speed >= XFER_SW_DMA_0 && drive->using_dma) hwif->dma_ops->dma_host_set(drive, 1); else if (hwif->dma_ops) /* check if host supports DMA */ ide_dma_off_quietly(drive); @@ -881,7 +961,7 @@ void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, spin_lock_irqsave(&ide_lock, flags); __ide_set_handler(drive, handler, timeout, expiry); - hwif->OUTBSYNC(hwif, cmd, hwif->io_ports.command_addr); + hwif->tp_ops->exec_command(hwif, cmd); /* * Drive takes 400nS to respond, we must avoid the IRQ being * serviced before that. @@ -899,12 +979,20 @@ void ide_execute_pkt_cmd(ide_drive_t *drive) unsigned long flags; spin_lock_irqsave(&ide_lock, flags); - hwif->OUTBSYNC(hwif, WIN_PACKETCMD, hwif->io_ports.command_addr); + hwif->tp_ops->exec_command(hwif, WIN_PACKETCMD); ndelay(400); spin_unlock_irqrestore(&ide_lock, flags); } EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); +static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) +{ + struct request *rq = drive->hwif->hwgroup->rq; + + if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) + ide_end_request(drive, err ? err : 1, 0); +} + /* needed below */ static ide_startstop_t do_reset1 (ide_drive_t *, int); @@ -916,12 +1004,13 @@ static ide_startstop_t do_reset1 (ide_drive_t *, int); */ static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) { - ide_hwgroup_t *hwgroup = HWGROUP(drive); + ide_hwif_t *hwif = drive->hwif; + ide_hwgroup_t *hwgroup = hwif->hwgroup; u8 stat; SELECT_DRIVE(drive); udelay (10); - stat = ide_read_status(drive); + stat = hwif->tp_ops->read_status(hwif); if (OK_STAT(stat, 0, BUSY_STAT)) printk("%s: ATAPI reset complete\n", drive->name); @@ -940,7 +1029,7 @@ static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) } /* done polling */ hwgroup->polling = 0; - hwgroup->resetting = 0; + ide_complete_drive_reset(drive, 0); return ide_stopped; } @@ -956,16 +1045,18 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive) ide_hwif_t *hwif = HWIF(drive); const struct ide_port_ops *port_ops = hwif->port_ops; u8 tmp; + int err = 0; if (port_ops && port_ops->reset_poll) { - if (port_ops->reset_poll(drive)) { + err = port_ops->reset_poll(drive); + if (err) { printk(KERN_ERR "%s: host reset_poll failure for %s.\n", hwif->name, drive->name); - return ide_stopped; + goto out; } } - tmp = ide_read_status(drive); + tmp = hwif->tp_ops->read_status(hwif); if (!OK_STAT(tmp, 0, BUSY_STAT)) { if (time_before(jiffies, hwgroup->poll_timeout)) { @@ -975,6 +1066,7 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive) } printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); drive->failures++; + err = -EIO; } else { printk("%s: reset: ", hwif->name); tmp = ide_read_error(drive); @@ -1001,10 +1093,12 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive) if (tmp & 0x80) printk("; slave: failed"); printk("\n"); + err = -EIO; } } +out: hwgroup->polling = 0; /* done polling */ - hwgroup->resetting = 0; /* done reset attempt */ + ide_complete_drive_reset(drive, err); return ide_stopped; } @@ -1076,8 +1170,8 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) ide_hwif_t *hwif; ide_hwgroup_t *hwgroup; struct ide_io_ports *io_ports; + const struct ide_tp_ops *tp_ops; const struct ide_port_ops *port_ops; - u8 ctl; spin_lock_irqsave(&ide_lock, flags); hwif = HWIF(drive); @@ -1085,16 +1179,17 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) io_ports = &hwif->io_ports; + tp_ops = hwif->tp_ops; + /* We must not reset with running handlers */ BUG_ON(hwgroup->handler != NULL); /* For an ATAPI device, first try an ATAPI SRST. */ if (drive->media != ide_disk && !do_not_try_atapi) { - hwgroup->resetting = 1; pre_reset(drive); SELECT_DRIVE(drive); udelay (20); - hwif->OUTBSYNC(hwif, WIN_SRST, io_ports->command_addr); + tp_ops->exec_command(hwif, WIN_SRST); ndelay(400); hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; hwgroup->polling = 1; @@ -1112,10 +1207,10 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) if (io_ports->ctl_addr == 0) { spin_unlock_irqrestore(&ide_lock, flags); + ide_complete_drive_reset(drive, -ENXIO); return ide_stopped; } - hwgroup->resetting = 1; /* * Note that we also set nIEN while resetting the device, * to mask unwanted interrupts from the interface during the reset. @@ -1123,16 +1218,15 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) * immediate interrupt due to the edge transition it produces. * This single interrupt gives us a "fast poll" for drives that * recover from reset very quickly, saving us the first 50ms wait time. + * + * TODO: add ->softreset method and stop abusing ->set_irq */ /* set SRST and nIEN */ - hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | 6, io_ports->ctl_addr); + tp_ops->set_irq(hwif, 4); /* more than enough time */ udelay(10); - if (drive->quirk_list == 2) - ctl = ATA_DEVCTL_OBS; /* clear SRST and nIEN */ - else - ctl = ATA_DEVCTL_OBS | 2; /* clear SRST, leave nIEN */ - hwif->OUTBSYNC(hwif, ctl, io_ports->ctl_addr); + /* clear SRST, leave nIEN (unless device is on the quirk list) */ + tp_ops->set_irq(hwif, drive->quirk_list == 2); /* more than enough time */ udelay(10); hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; @@ -1177,7 +1271,7 @@ int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) * about locking issues (2.5 work ?). */ mdelay(1); - stat = hwif->INB(hwif->io_ports.status_addr); + stat = hwif->tp_ops->read_status(hwif); if ((stat & BUSY_STAT) == 0) return 0; /* |