ide: move error handling code to ide-eh.c (v2)
authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Tue, 24 Mar 2009 22:22:47 +0000 (23:22 +0100)
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Tue, 24 Mar 2009 22:22:47 +0000 (23:22 +0100)
Do some CodingStyle fixups in <linux/ide.h> while at it.

v2:
Add missing <linux/delay.h> include (reported by Stephen Rothwell).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
drivers/ide/Makefile
drivers/ide/ide-eh.c [new file with mode: 0644]
drivers/ide/ide-io.c
drivers/ide/ide-iops.c
include/linux/ide.h

index cbb1aea2aea3313efd1e189f604d0307a9f70930..9b4bbe1cdc1ad9eeb511fe607853d8a6ba985ba1 100644 (file)
@@ -6,7 +6,7 @@ EXTRA_CFLAGS                            += -Idrivers/ide
 
 ide-core-y += ide.o ide-ioctls.o ide-io.o ide-iops.o ide-lib.o ide-probe.o \
              ide-taskfile.o ide-pm.o ide-park.o ide-sysfs.o ide-devsets.o \
-             ide-io-std.o
+             ide-io-std.o ide-eh.o
 
 # core IDE code
 ide-core-$(CONFIG_IDE_XFER_MODE)       += ide-pio-blacklist.o ide-xfer-mode.o
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
new file mode 100644 (file)
index 0000000..1231b5e
--- /dev/null
@@ -0,0 +1,428 @@
+
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/delay.h>
+
+static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
+                                    u8 stat, u8 err)
+{
+       ide_hwif_t *hwif = drive->hwif;
+
+       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 & ATA_ERR) {
+               /* err has different meaning on cdrom and tape */
+               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 & (ATA_BBK | ATA_UNC)) {
+                       /* retries won't help these */
+                       rq->errors = ERROR_MAX;
+               } else if (err & ATA_TRK0NF) {
+                       /* help it find track zero */
+                       rq->errors |= ERROR_RECAL;
+               }
+       }
+
+       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;
+
+               ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
+       }
+
+       if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {
+               ide_kill_rq(drive, rq);
+               return ide_stopped;
+       }
+
+       if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
+               rq->errors |= ERROR_RESET;
+
+       if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
+               ++rq->errors;
+               return ide_do_reset(drive);
+       }
+
+       if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
+               drive->special.b.recalibrate = 1;
+
+       ++rq->errors;
+
+       return ide_stopped;
+}
+
+static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq,
+                                      u8 stat, u8 err)
+{
+       ide_hwif_t *hwif = drive->hwif;
+
+       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) & (ATA_BUSY | ATA_DRQ))
+               /* force an abort */
+               hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
+
+       if (rq->errors >= ERROR_MAX) {
+               ide_kill_rq(drive, rq);
+       } else {
+               if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
+                       ++rq->errors;
+                       return ide_do_reset(drive);
+               }
+               ++rq->errors;
+       }
+
+       return ide_stopped;
+}
+
+static ide_startstop_t __ide_error(ide_drive_t *drive, struct request *rq,
+                                  u8 stat, u8 err)
+{
+       if (drive->media == ide_disk)
+               return ide_ata_error(drive, rq, stat, err);
+       return ide_atapi_error(drive, rq, stat, err);
+}
+
+/**
+ *     ide_error       -       handle an error on the IDE
+ *     @drive: drive the error occurred on
+ *     @msg: message to report
+ *     @stat: status bits
+ *
+ *     ide_error() takes action based on the error returned by the drive.
+ *     For normal I/O that may well include retries. We deal with
+ *     both new-style (taskfile) and old style command handling here.
+ *     In the case of taskfile command handling there is work left to
+ *     do
+ */
+
+ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
+{
+       struct request *rq;
+       u8 err;
+
+       err = ide_dump_status(drive, msg, stat);
+
+       rq = drive->hwif->rq;
+       if (rq == NULL)
+               return ide_stopped;
+
+       /* retry only "normal" I/O: */
+       if (!blk_fs_request(rq)) {
+               rq->errors = 1;
+               ide_end_drive_cmd(drive, stat, err);
+               return ide_stopped;
+       }
+
+       return __ide_error(drive, rq, stat, err);
+}
+EXPORT_SYMBOL_GPL(ide_error);
+
+static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
+{
+       struct request *rq = drive->hwif->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);
+
+/*
+ * atapi_reset_pollfunc() gets invoked to poll the interface for completion
+ * every 50ms during an atapi drive reset operation.  If the drive has not yet
+ * responded, and we have not yet hit our maximum waiting time, then the timer
+ * is restarted for another 50ms.
+ */
+static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive)
+{
+       ide_hwif_t *hwif = drive->hwif;
+       u8 stat;
+
+       SELECT_DRIVE(drive);
+       udelay(10);
+       stat = hwif->tp_ops->read_status(hwif);
+
+       if (OK_STAT(stat, 0, ATA_BUSY))
+               printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name);
+       else {
+               if (time_before(jiffies, hwif->poll_timeout)) {
+                       ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20,
+                                       NULL);
+                       /* continue polling */
+                       return ide_started;
+               }
+               /* end of polling */
+               hwif->polling = 0;
+               printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n",
+                       drive->name, stat);
+               /* do it the old fashioned way */
+               return do_reset1(drive, 1);
+       }
+       /* done polling */
+       hwif->polling = 0;
+       ide_complete_drive_reset(drive, 0);
+       return ide_stopped;
+}
+
+static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
+{
+       static const char *err_master_vals[] =
+               { NULL, "passed", "formatter device error",
+                 "sector buffer error", "ECC circuitry error",
+                 "controlling MPU error" };
+
+       u8 err_master = err & 0x7f;
+
+       printk(KERN_ERR "%s: reset: master: ", hwif->name);
+       if (err_master && err_master < 6)
+               printk(KERN_CONT "%s", err_master_vals[err_master]);
+       else
+               printk(KERN_CONT "error (0x%02x?)", err);
+       if (err & 0x80)
+               printk(KERN_CONT "; slave: failed");
+       printk(KERN_CONT "\n");
+}
+
+/*
+ * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
+ * during an ide reset operation. If the drives have not yet responded,
+ * and we have not yet hit our maximum waiting time, then the timer is restarted
+ * for another 50ms.
+ */
+static ide_startstop_t reset_pollfunc(ide_drive_t *drive)
+{
+       ide_hwif_t *hwif = drive->hwif;
+       const struct ide_port_ops *port_ops = hwif->port_ops;
+       u8 tmp;
+       int err = 0;
+
+       if (port_ops && port_ops->reset_poll) {
+               err = port_ops->reset_poll(drive);
+               if (err) {
+                       printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
+                               hwif->name, drive->name);
+                       goto out;
+               }
+       }
+
+       tmp = hwif->tp_ops->read_status(hwif);
+
+       if (!OK_STAT(tmp, 0, ATA_BUSY)) {
+               if (time_before(jiffies, hwif->poll_timeout)) {
+                       ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
+                       /* continue polling */
+                       return ide_started;
+               }
+               printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n",
+                       hwif->name, tmp);
+               drive->failures++;
+               err = -EIO;
+       } else  {
+               tmp = ide_read_error(drive);
+
+               if (tmp == 1) {
+                       printk(KERN_INFO "%s: reset: success\n", hwif->name);
+                       drive->failures = 0;
+               } else {
+                       ide_reset_report_error(hwif, tmp);
+                       drive->failures++;
+                       err = -EIO;
+               }
+       }
+out:
+       hwif->polling = 0;      /* done polling */
+       ide_complete_drive_reset(drive, err);
+       return ide_stopped;
+}
+
+static void ide_disk_pre_reset(ide_drive_t *drive)
+{
+       int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
+
+       drive->special.all = 0;
+       drive->special.b.set_geometry = legacy;
+       drive->special.b.recalibrate  = legacy;
+
+       drive->mult_count = 0;
+       drive->dev_flags &= ~IDE_DFLAG_PARKED;
+
+       if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
+           (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
+               drive->mult_req = 0;
+
+       if (drive->mult_req != drive->mult_count)
+               drive->special.b.set_multmode = 1;
+}
+
+static void pre_reset(ide_drive_t *drive)
+{
+       const struct ide_port_ops *port_ops = drive->hwif->port_ops;
+
+       if (drive->media == ide_disk)
+               ide_disk_pre_reset(drive);
+       else
+               drive->dev_flags |= IDE_DFLAG_POST_RESET;
+
+       if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
+               if (drive->crc_count)
+                       ide_check_dma_crc(drive);
+               else
+                       ide_dma_off(drive);
+       }
+
+       if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
+               if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
+                       drive->dev_flags &= ~IDE_DFLAG_UNMASK;
+                       drive->io_32bit = 0;
+               }
+               return;
+       }
+
+       if (port_ops && port_ops->pre_reset)
+               port_ops->pre_reset(drive);
+
+       if (drive->current_speed != 0xff)
+               drive->desired_speed = drive->current_speed;
+       drive->current_speed = 0xff;
+}
+
+/*
+ * do_reset1() attempts to recover a confused drive by resetting it.
+ * Unfortunately, resetting a disk drive actually resets all devices on
+ * the same interface, so it can really be thought of as resetting the
+ * interface rather than resetting the drive.
+ *
+ * ATAPI devices have their own reset mechanism which allows them to be
+ * individually reset without clobbering other devices on the same interface.
+ *
+ * Unfortunately, the IDE interface does not generate an interrupt to let
+ * us know when the reset operation has finished, so we must poll for this.
+ * Equally poor, though, is the fact that this may a very long time to complete,
+ * (up to 30 seconds worstcase).  So, instead of busy-waiting here for it,
+ * we set a timer to poll at 50ms intervals.
+ */
+static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
+{
+       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;
+       const struct ide_port_ops *port_ops;
+       ide_drive_t *tdrive;
+       unsigned long flags, timeout;
+       int i;
+       DEFINE_WAIT(wait);
+
+       spin_lock_irqsave(&hwif->lock, flags);
+
+       /* We must not reset with running handlers */
+       BUG_ON(hwif->handler != NULL);
+
+       /* For an ATAPI device, first try an ATAPI SRST. */
+       if (drive->media != ide_disk && !do_not_try_atapi) {
+               pre_reset(drive);
+               SELECT_DRIVE(drive);
+               udelay(20);
+               tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
+               ndelay(400);
+               hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
+               hwif->polling = 1;
+               __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
+               spin_unlock_irqrestore(&hwif->lock, flags);
+               return ide_started;
+       }
+
+       /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
+       do {
+               unsigned long now;
+
+               prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
+               timeout = jiffies;
+               ide_port_for_each_present_dev(i, tdrive, hwif) {
+                       if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
+                           time_after(tdrive->sleep, timeout))
+                               timeout = tdrive->sleep;
+               }
+
+               now = jiffies;
+               if (time_before_eq(timeout, now))
+                       break;
+
+               spin_unlock_irqrestore(&hwif->lock, flags);
+               timeout = schedule_timeout_uninterruptible(timeout - now);
+               spin_lock_irqsave(&hwif->lock, flags);
+       } while (timeout);
+       finish_wait(&ide_park_wq, &wait);
+
+       /*
+        * First, reset any device state data we were maintaining
+        * for any of the drives on this interface.
+        */
+       ide_port_for_each_dev(i, tdrive, hwif)
+               pre_reset(tdrive);
+
+       if (io_ports->ctl_addr == 0) {
+               spin_unlock_irqrestore(&hwif->lock, flags);
+               ide_complete_drive_reset(drive, -ENXIO);
+               return ide_stopped;
+       }
+
+       /*
+        * Note that we also set nIEN while resetting the device,
+        * to mask unwanted interrupts from the interface during the reset.
+        * However, due to the design of PC hardware, this will cause an
+        * 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 */
+       tp_ops->set_irq(hwif, 4);
+       /* more than enough time */
+       udelay(10);
+       /* 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);
+       hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
+       hwif->polling = 1;
+       __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
+
+       /*
+        * Some weird controller like resetting themselves to a strange
+        * state when the disks are reset this way. At least, the Winbond
+        * 553 documentation says that
+        */
+       port_ops = hwif->port_ops;
+       if (port_ops && port_ops->resetproc)
+               port_ops->resetproc(drive);
+
+       spin_unlock_irqrestore(&hwif->lock, flags);
+       return ide_started;
+}
+
+/*
+ * ide_do_reset() is the entry point to the drive/interface reset code.
+ */
+
+ide_startstop_t ide_do_reset(ide_drive_t *drive)
+{
+       return do_reset1(drive, 0);
+}
+EXPORT_SYMBOL(ide_do_reset);
index 74d1a3e682529b1b14a26fe5c675c034c79910b2..2e92497b58aa02501b208562ab498d4f4d6c1e87 100644 (file)
@@ -196,7 +196,7 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
 }
 EXPORT_SYMBOL(ide_end_drive_cmd);
 
-static void ide_kill_rq(ide_drive_t *drive, struct request *rq)
+void ide_kill_rq(ide_drive_t *drive, struct request *rq)
 {
        if (rq->rq_disk) {
                struct ide_driver *drv;
@@ -207,133 +207,6 @@ static void ide_kill_rq(ide_drive_t *drive, struct request *rq)
                ide_end_request(drive, 0, 0);
 }
 
-static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
-{
-       ide_hwif_t *hwif = drive->hwif;
-
-       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 & ATA_ERR) {
-               /* err has different meaning on cdrom and tape */
-               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 & (ATA_BBK | ATA_UNC)) {
-                       /* retries won't help these */
-                       rq->errors = ERROR_MAX;
-               } else if (err & ATA_TRK0NF) {
-                       /* help it find track zero */
-                       rq->errors |= ERROR_RECAL;
-               }
-       }
-
-       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;
-
-               ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
-       }
-
-       if (rq->errors >= ERROR_MAX || blk_noretry_request(rq)) {
-               ide_kill_rq(drive, rq);
-               return ide_stopped;
-       }
-
-       if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
-               rq->errors |= ERROR_RESET;
-
-       if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
-               ++rq->errors;
-               return ide_do_reset(drive);
-       }
-
-       if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
-               drive->special.b.recalibrate = 1;
-
-       ++rq->errors;
-
-       return ide_stopped;
-}
-
-static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
-{
-       ide_hwif_t *hwif = drive->hwif;
-
-       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) & (ATA_BUSY | ATA_DRQ))
-               /* force an abort */
-               hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
-
-       if (rq->errors >= ERROR_MAX) {
-               ide_kill_rq(drive, rq);
-       } else {
-               if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
-                       ++rq->errors;
-                       return ide_do_reset(drive);
-               }
-               ++rq->errors;
-       }
-
-       return ide_stopped;
-}
-
-static ide_startstop_t
-__ide_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
-{
-       if (drive->media == ide_disk)
-               return ide_ata_error(drive, rq, stat, err);
-       return ide_atapi_error(drive, rq, stat, err);
-}
-
-/**
- *     ide_error       -       handle an error on the IDE
- *     @drive: drive the error occurred on
- *     @msg: message to report
- *     @stat: status bits
- *
- *     ide_error() takes action based on the error returned by the drive.
- *     For normal I/O that may well include retries. We deal with
- *     both new-style (taskfile) and old style command handling here.
- *     In the case of taskfile command handling there is work left to
- *     do
- */
-ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, u8 stat)
-{
-       struct request *rq;
-       u8 err;
-
-       err = ide_dump_status(drive, msg, stat);
-
-       rq = drive->hwif->rq;
-       if (rq == NULL)
-               return ide_stopped;
-
-       /* retry only "normal" I/O: */
-       if (!blk_fs_request(rq)) {
-               rq->errors = 1;
-               ide_end_drive_cmd(drive, stat, err);
-               return ide_stopped;
-       }
-
-       return __ide_error(drive, rq, stat, err);
-}
-EXPORT_SYMBOL_GPL(ide_error);
-
 static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
 {
        tf->nsect   = drive->sect;
index cf6c3036ae7f7a15ba83487ea9c8696a94329492..e0cfa2d2acc77c742230f73116bb186f15668692 100644 (file)
@@ -446,8 +446,8 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
  *
  * See also ide_execute_command
  */
-static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
-                     unsigned int timeout, ide_expiry_t *expiry)
+void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
+                      unsigned int timeout, ide_expiry_t *expiry)
 {
        ide_hwif_t *hwif = drive->hwif;
 
@@ -517,301 +517,6 @@ void ide_execute_pkt_cmd(ide_drive_t *drive)
 }
 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->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);
-
-/*
- * atapi_reset_pollfunc() gets invoked to poll the interface for completion
- * every 50ms during an atapi drive reset operation.  If the drive has not yet
- * responded, and we have not yet hit our maximum waiting time, then the timer
- * is restarted for another 50ms.
- */
-static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive)
-{
-       ide_hwif_t *hwif = drive->hwif;
-       u8 stat;
-
-       SELECT_DRIVE(drive);
-       udelay(10);
-       stat = hwif->tp_ops->read_status(hwif);
-
-       if (OK_STAT(stat, 0, ATA_BUSY))
-               printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name);
-       else {
-               if (time_before(jiffies, hwif->poll_timeout)) {
-                       ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20,
-                                       NULL);
-                       /* continue polling */
-                       return ide_started;
-               }
-               /* end of polling */
-               hwif->polling = 0;
-               printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n",
-                       drive->name, stat);
-               /* do it the old fashioned way */
-               return do_reset1(drive, 1);
-       }
-       /* done polling */
-       hwif->polling = 0;
-       ide_complete_drive_reset(drive, 0);
-       return ide_stopped;
-}
-
-static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
-{
-       static const char *err_master_vals[] =
-               { NULL, "passed", "formatter device error",
-                 "sector buffer error", "ECC circuitry error",
-                 "controlling MPU error" };
-
-       u8 err_master = err & 0x7f;
-
-       printk(KERN_ERR "%s: reset: master: ", hwif->name);
-       if (err_master && err_master < 6)
-               printk(KERN_CONT "%s", err_master_vals[err_master]);
-       else
-               printk(KERN_CONT "error (0x%02x?)", err);
-       if (err & 0x80)
-               printk(KERN_CONT "; slave: failed");
-       printk(KERN_CONT "\n");
-}
-
-/*
- * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
- * during an ide reset operation. If the drives have not yet responded,
- * and we have not yet hit our maximum waiting time, then the timer is restarted
- * for another 50ms.
- */
-static ide_startstop_t reset_pollfunc(ide_drive_t *drive)
-{
-       ide_hwif_t *hwif = drive->hwif;
-       const struct ide_port_ops *port_ops = hwif->port_ops;
-       u8 tmp;
-       int err = 0;
-
-       if (port_ops && port_ops->reset_poll) {
-               err = port_ops->reset_poll(drive);
-               if (err) {
-                       printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
-                               hwif->name, drive->name);
-                       goto out;
-               }
-       }
-
-       tmp = hwif->tp_ops->read_status(hwif);
-
-       if (!OK_STAT(tmp, 0, ATA_BUSY)) {
-               if (time_before(jiffies, hwif->poll_timeout)) {
-                       ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
-                       /* continue polling */
-                       return ide_started;
-               }
-               printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n",
-                       hwif->name, tmp);
-               drive->failures++;
-               err = -EIO;
-       } else  {
-               tmp = ide_read_error(drive);
-
-               if (tmp == 1) {
-                       printk(KERN_INFO "%s: reset: success\n", hwif->name);
-                       drive->failures = 0;
-               } else {
-                       ide_reset_report_error(hwif, tmp);
-                       drive->failures++;
-                       err = -EIO;
-               }
-       }
-out:
-       hwif->polling = 0;      /* done polling */
-       ide_complete_drive_reset(drive, err);
-       return ide_stopped;
-}
-
-static void ide_disk_pre_reset(ide_drive_t *drive)
-{
-       int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
-
-       drive->special.all = 0;
-       drive->special.b.set_geometry = legacy;
-       drive->special.b.recalibrate  = legacy;
-
-       drive->mult_count = 0;
-       drive->dev_flags &= ~IDE_DFLAG_PARKED;
-
-       if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
-           (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
-               drive->mult_req = 0;
-
-       if (drive->mult_req != drive->mult_count)
-               drive->special.b.set_multmode = 1;
-}
-
-static void pre_reset(ide_drive_t *drive)
-{
-       const struct ide_port_ops *port_ops = drive->hwif->port_ops;
-
-       if (drive->media == ide_disk)
-               ide_disk_pre_reset(drive);
-       else
-               drive->dev_flags |= IDE_DFLAG_POST_RESET;
-
-       if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
-               if (drive->crc_count)
-                       ide_check_dma_crc(drive);
-               else
-                       ide_dma_off(drive);
-       }
-
-       if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
-               if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
-                       drive->dev_flags &= ~IDE_DFLAG_UNMASK;
-                       drive->io_32bit = 0;
-               }
-               return;
-       }
-
-       if (port_ops && port_ops->pre_reset)
-               port_ops->pre_reset(drive);
-
-       if (drive->current_speed != 0xff)
-               drive->desired_speed = drive->current_speed;
-       drive->current_speed = 0xff;
-}
-
-/*
- * do_reset1() attempts to recover a confused drive by resetting it.
- * Unfortunately, resetting a disk drive actually resets all devices on
- * the same interface, so it can really be thought of as resetting the
- * interface rather than resetting the drive.
- *
- * ATAPI devices have their own reset mechanism which allows them to be
- * individually reset without clobbering other devices on the same interface.
- *
- * Unfortunately, the IDE interface does not generate an interrupt to let
- * us know when the reset operation has finished, so we must poll for this.
- * Equally poor, though, is the fact that this may a very long time to complete,
- * (up to 30 seconds worstcase).  So, instead of busy-waiting here for it,
- * we set a timer to poll at 50ms intervals.
- */
-static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
-{
-       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;
-       const struct ide_port_ops *port_ops;
-       ide_drive_t *tdrive;
-       unsigned long flags, timeout;
-       int i;
-       DEFINE_WAIT(wait);
-
-       spin_lock_irqsave(&hwif->lock, flags);
-
-       /* We must not reset with running handlers */
-       BUG_ON(hwif->handler != NULL);
-
-       /* For an ATAPI device, first try an ATAPI SRST. */
-       if (drive->media != ide_disk && !do_not_try_atapi) {
-               pre_reset(drive);
-               SELECT_DRIVE(drive);
-               udelay(20);
-               tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
-               ndelay(400);
-               hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
-               hwif->polling = 1;
-               __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
-               spin_unlock_irqrestore(&hwif->lock, flags);
-               return ide_started;
-       }
-
-       /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
-       do {
-               unsigned long now;
-
-               prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
-               timeout = jiffies;
-               ide_port_for_each_present_dev(i, tdrive, hwif) {
-                       if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
-                           time_after(tdrive->sleep, timeout))
-                               timeout = tdrive->sleep;
-               }
-
-               now = jiffies;
-               if (time_before_eq(timeout, now))
-                       break;
-
-               spin_unlock_irqrestore(&hwif->lock, flags);
-               timeout = schedule_timeout_uninterruptible(timeout - now);
-               spin_lock_irqsave(&hwif->lock, flags);
-       } while (timeout);
-       finish_wait(&ide_park_wq, &wait);
-
-       /*
-        * First, reset any device state data we were maintaining
-        * for any of the drives on this interface.
-        */
-       ide_port_for_each_dev(i, tdrive, hwif)
-               pre_reset(tdrive);
-
-       if (io_ports->ctl_addr == 0) {
-               spin_unlock_irqrestore(&hwif->lock, flags);
-               ide_complete_drive_reset(drive, -ENXIO);
-               return ide_stopped;
-       }
-
-       /*
-        * Note that we also set nIEN while resetting the device,
-        * to mask unwanted interrupts from the interface during the reset.
-        * However, due to the design of PC hardware, this will cause an
-        * 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 */
-       tp_ops->set_irq(hwif, 4);
-       /* more than enough time */
-       udelay(10);
-       /* 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);
-       hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
-       hwif->polling = 1;
-       __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
-
-       /*
-        * Some weird controller like resetting themselves to a strange
-        * state when the disks are reset this way. At least, the Winbond
-        * 553 documentation says that
-        */
-       port_ops = hwif->port_ops;
-       if (port_ops && port_ops->resetproc)
-               port_ops->resetproc(drive);
-
-       spin_unlock_irqrestore(&hwif->lock, flags);
-       return ide_started;
-}
-
-/*
- * ide_do_reset() is the entry point to the drive/interface reset code.
- */
-
-ide_startstop_t ide_do_reset(ide_drive_t *drive)
-{
-       return do_reset1(drive, 0);
-}
-EXPORT_SYMBOL(ide_do_reset);
-
 /*
  * ide_wait_not_busy() waits for the currently selected device on the hwif
  * to report a non-busy status, see comments in ide_probe_port().
index 323c3710fbf429a656623d91962ff1cb1b27a1fb..0c87ed52a875fae0432764326f41cb1b484231f6 100644 (file)
@@ -1146,11 +1146,14 @@ int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned, unsigned l
 extern int ide_vlb_clk;
 extern int ide_pci_clk;
 
-extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
-int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
-                            int uptodate, int nr_sectors);
-
-extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
+int ide_end_request(ide_drive_t *, int, int);
+int ide_end_dequeued_request(ide_drive_t *, struct request *, int, int);
+void ide_kill_rq(ide_drive_t *, struct request *);
+
+void __ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int,
+                      ide_expiry_t *);
+void ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int,
+                    ide_expiry_t *);
 
 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
                         ide_expiry_t *);