#include "libata.h"
+/* debounce timing parameters in msecs { interval, duration, timeout } */
+const unsigned long sata_deb_timing_boot[] = { 5, 100, 2000 };
+const unsigned long sata_deb_timing_eh[] = { 25, 500, 2000 };
+const unsigned long sata_deb_timing_before_fsrst[] = { 100, 2000, 5000 };
+
static unsigned int ata_dev_init_params(struct ata_device *dev,
u16 heads, u16 sectors);
static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
+struct workqueue_struct *ata_aux_wq;
+
int atapi_enabled = 1;
module_param(atapi_enabled, int, 0444);
MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
/**
* ata_port_queue_task - Queue port_task
* @ap: The ata_port to queue port_task for
+ * @fn: workqueue function to be scheduled
+ * @data: data value to pass to workqueue function
+ * @delay: delay time for workqueue function
*
* Schedule @fn(@data) for execution after @delay jiffies using
* port_task. There is one port_task per port and it's the
u8 command = tf->command;
struct ata_queued_cmd *qc;
unsigned int tag, preempted_tag;
+ u32 preempted_sactive, preempted_qc_active;
DECLARE_COMPLETION(wait);
unsigned long flags;
unsigned int err_mask;
+ int rc;
spin_lock_irqsave(&ap->host_set->lock, flags);
+ /* no internal command while frozen */
+ if (ap->flags & ATA_FLAG_FROZEN) {
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ return AC_ERR_SYSTEM;
+ }
+
/* initialize internal qc */
/* XXX: Tag 0 is used for drivers with legacy EH as some
else
tag = 0;
- if (test_and_set_bit(tag, &ap->qactive))
+ if (test_and_set_bit(tag, &ap->qc_allocated))
BUG();
qc = __ata_qc_from_tag(ap, tag);
ata_qc_reinit(qc);
preempted_tag = ap->active_tag;
+ preempted_sactive = ap->sactive;
+ preempted_qc_active = ap->qc_active;
ap->active_tag = ATA_TAG_POISON;
+ ap->sactive = 0;
+ ap->qc_active = 0;
/* prepare & issue qc */
qc->tf = *tf;
spin_unlock_irqrestore(&ap->host_set->lock, flags);
- if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
- ata_port_flush_task(ap);
+ rc = wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL);
+
+ ata_port_flush_task(ap);
+ if (!rc) {
spin_lock_irqsave(&ap->host_set->lock, flags);
/* We're racing with irq here. If we lose, the
* following test prevents us from completing the qc
- * again. If completion irq occurs after here but
- * before the caller cleans up, it will result in a
- * spurious interrupt. We can live with that.
+ * twice. If we win, the port is frozen and will be
+ * cleaned up by ->post_internal_cmd().
*/
if (qc->flags & ATA_QCFLAG_ACTIVE) {
- qc->err_mask = AC_ERR_TIMEOUT;
- ata_qc_complete(qc);
+ qc->err_mask |= AC_ERR_TIMEOUT;
+
+ if (ap->ops->error_handler)
+ ata_port_freeze(ap);
+ else
+ ata_qc_complete(qc);
ata_dev_printk(dev, KERN_WARNING,
"qc timeout (cmd 0x%x)\n", command);
spin_unlock_irqrestore(&ap->host_set->lock, flags);
}
+ /* do post_internal_cmd */
+ if (ap->ops->post_internal_cmd)
+ ap->ops->post_internal_cmd(qc);
+
+ if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) {
+ ata_dev_printk(dev, KERN_WARNING, "zero err_mask for failed "
+ "internal command, assuming AC_ERR_OTHER\n");
+ qc->err_mask |= AC_ERR_OTHER;
+ }
+
/* finish up */
spin_lock_irqsave(&ap->host_set->lock, flags);
ata_qc_free(qc);
ap->active_tag = preempted_tag;
+ ap->sactive = preempted_sactive;
+ ap->qc_active = preempted_qc_active;
/* XXX - Some LLDDs (sata_mv) disable port on command failure.
* Until those drivers are fixed, we detect the condition
* RETURNS:
* 0 on success, -errno otherwise.
*/
-static int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
- int post_reset, u16 *id)
+int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
+ int post_reset, u16 *id)
{
struct ata_port *ap = dev->ap;
unsigned int class = *p_class;
return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
}
+static void ata_dev_config_ncq(struct ata_device *dev,
+ char *desc, size_t desc_sz)
+{
+ struct ata_port *ap = dev->ap;
+ int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
+
+ if (!ata_id_has_ncq(dev->id)) {
+ desc[0] = '\0';
+ return;
+ }
+
+ if (ap->flags & ATA_FLAG_NCQ) {
+ hdepth = min(ap->host->can_queue, ATA_MAX_QUEUE - 1);
+ dev->flags |= ATA_DFLAG_NCQ;
+ }
+
+ if (hdepth >= ddepth)
+ snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
+ else
+ snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
+}
+
/**
* ata_dev_configure - Configure the specified ATA/ATAPI device
* @dev: Target device to configure
* RETURNS:
* 0 on success, -errno otherwise
*/
-static int ata_dev_configure(struct ata_device *dev, int print_info)
+int ata_dev_configure(struct ata_device *dev, int print_info)
{
struct ata_port *ap = dev->ap;
const u16 *id = dev->id;
if (ata_id_has_lba(id)) {
const char *lba_desc;
+ char ncq_desc[20];
lba_desc = "LBA";
dev->flags |= ATA_DFLAG_LBA;
lba_desc = "LBA48";
}
+ /* config NCQ */
+ ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
+
/* print device info to dmesg */
if (print_info)
ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
- "max %s, %Lu sectors: %s\n",
+ "max %s, %Lu sectors: %s %s\n",
ata_id_major_version(id),
ata_mode_string(xfer_mask),
(unsigned long long)dev->n_sectors,
- lba_desc);
+ lba_desc, ncq_desc);
} else {
/* CHS */
dev->cylinders, dev->heads, dev->sectors);
}
+ if (dev->id[59] & 0x100) {
+ dev->multi_count = dev->id[59] & 0xff;
+ DPRINTK("ata%u: dev %u multi count %u\n",
+ ap->id, dev->devno, dev->multi_count);
+ }
+
dev->cdb_len = 16;
}
/* ATAPI-specific feature tests */
else if (dev->class == ATA_DEV_ATAPI) {
+ char *cdb_intr_string = "";
+
rc = atapi_cdb_len(id);
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
ata_dev_printk(dev, KERN_WARNING,
}
dev->cdb_len = (unsigned int) rc;
+ if (ata_id_cdb_intr(dev->id)) {
+ dev->flags |= ATA_DFLAG_CDB_INTR;
+ cdb_intr_string = ", CDB intr";
+ }
+
/* print device info to dmesg */
if (print_info)
- ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s\n",
- ata_mode_string(xfer_mask));
+ ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n",
+ ata_mode_string(xfer_mask),
+ cdb_intr_string);
}
ap->host->max_cmd_len = 0;
if (classes[i] == ATA_DEV_UNKNOWN)
classes[i] = ATA_DEV_NONE;
+ /* after the reset the device state is PIO 0 and the controller
+ state is undefined. Record the mode */
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ ap->device[i].pio_mode = XFER_PIO_0;
+
/* read IDENTIFY page and configure devices */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
dev = &ap->device[i];
DPRINTK("EXIT\n");
}
-static int sata_phy_resume(struct ata_port *ap)
+/**
+ * sata_phy_debounce - debounce SATA phy status
+ * @ap: ATA port to debounce SATA phy status for
+ * @params: timing parameters { interval, duratinon, timeout } in msec
+ *
+ * Make sure SStatus of @ap reaches stable state, determined by
+ * holding the same value where DET is not 1 for @duration polled
+ * every @interval, before @timeout. Timeout constraints the
+ * beginning of the stable state. Because, after hot unplugging,
+ * DET gets stuck at 1 on some controllers, this functions waits
+ * until timeout then returns 0 if DET is stable at 1.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int sata_phy_debounce(struct ata_port *ap, const unsigned long *params)
{
- unsigned long timeout = jiffies + (HZ * 5);
- u32 scontrol, sstatus;
+ unsigned long interval_msec = params[0];
+ unsigned long duration = params[1] * HZ / 1000;
+ unsigned long timeout = jiffies + params[2] * HZ / 1000;
+ unsigned long last_jiffies;
+ u32 last, cur;
+ int rc;
+
+ if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
+ return rc;
+ cur &= 0xf;
+
+ last = cur;
+ last_jiffies = jiffies;
+
+ while (1) {
+ msleep(interval_msec);
+ if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
+ return rc;
+ cur &= 0xf;
+
+ /* DET stable? */
+ if (cur == last) {
+ if (cur == 1 && time_before(jiffies, timeout))
+ continue;
+ if (time_after(jiffies, last_jiffies + duration))
+ return 0;
+ continue;
+ }
+
+ /* unstable, start over */
+ last = cur;
+ last_jiffies = jiffies;
+
+ /* check timeout */
+ if (time_after(jiffies, timeout))
+ return -EBUSY;
+ }
+}
+
+/**
+ * sata_phy_resume - resume SATA phy
+ * @ap: ATA port to resume SATA phy for
+ * @params: timing parameters { interval, duratinon, timeout } in msec
+ *
+ * Resume SATA phy of @ap and debounce it.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int sata_phy_resume(struct ata_port *ap, const unsigned long *params)
+{
+ u32 scontrol;
int rc;
if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
return rc;
- /* Wait for phy to become ready, if necessary. */
- do {
- msleep(200);
- if ((rc = sata_scr_read(ap, SCR_STATUS, &sstatus)))
+ /* Some PHYs react badly if SStatus is pounded immediately
+ * after resuming. Delay 200ms before debouncing.
+ */
+ msleep(200);
+
+ return sata_phy_debounce(ap, params);
+}
+
+static void ata_wait_spinup(struct ata_port *ap)
+{
+ struct ata_eh_context *ehc = &ap->eh_context;
+ unsigned long end, secs;
+ int rc;
+
+ /* first, debounce phy if SATA */
+ if (ap->cbl == ATA_CBL_SATA) {
+ rc = sata_phy_debounce(ap, sata_deb_timing_eh);
+
+ /* if debounced successfully and offline, no need to wait */
+ if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap))
+ return;
+ }
+
+ /* okay, let's give the drive time to spin up */
+ end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000;
+ secs = ((end - jiffies) + HZ - 1) / HZ;
+
+ if (time_after(jiffies, end))
+ return;
+
+ if (secs > 5)
+ ata_port_printk(ap, KERN_INFO, "waiting for device to spin up "
+ "(%lu secs)\n", secs);
+
+ schedule_timeout_uninterruptible(end - jiffies);
+}
+
+/**
+ * ata_std_prereset - prepare for reset
+ * @ap: ATA port to be reset
+ *
+ * @ap is about to be reset. Initialize it.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ata_std_prereset(struct ata_port *ap)
+{
+ struct ata_eh_context *ehc = &ap->eh_context;
+ const unsigned long *timing;
+ int rc;
+
+ /* hotplug? */
+ if (ehc->i.flags & ATA_EHI_HOTPLUGGED) {
+ if (ap->flags & ATA_FLAG_HRST_TO_RESUME)
+ ehc->i.action |= ATA_EH_HARDRESET;
+ if (ap->flags & ATA_FLAG_SKIP_D2H_BSY)
+ ata_wait_spinup(ap);
+ }
+
+ /* if we're about to do hardreset, nothing more to do */
+ if (ehc->i.action & ATA_EH_HARDRESET)
+ return 0;
+
+ /* if SATA, resume phy */
+ if (ap->cbl == ATA_CBL_SATA) {
+ if (ap->flags & ATA_FLAG_LOADING)
+ timing = sata_deb_timing_boot;
+ else
+ timing = sata_deb_timing_eh;
+
+ rc = sata_phy_resume(ap, timing);
+ if (rc && rc != -EOPNOTSUPP) {
+ /* phy resume failed */
+ ata_port_printk(ap, KERN_WARNING, "failed to resume "
+ "link for reset (errno=%d)\n", rc);
return rc;
- if ((sstatus & 0xf) != 1)
- return 0;
- } while (time_before(jiffies, timeout));
+ }
+ }
+
+ /* Wait for !BSY if the controller can wait for the first D2H
+ * Reg FIS and we don't know that no device is attached.
+ */
+ if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap))
+ ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
- return -EBUSY;
+ return 0;
}
/**
*/
void ata_std_probeinit(struct ata_port *ap)
{
- u32 scontrol;
+ static const unsigned long deb_timing[] = { 5, 100, 5000 };
/* resume link */
- sata_phy_resume(ap);
-
- /* init sata_spd_limit to the current value */
- if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
- int spd = (scontrol >> 4) & 0xf;
- ap->sata_spd_limit &= (1 << spd) - 1;
- }
+ sata_phy_resume(ap, deb_timing);
/* wait for device */
if (ata_port_online(ap))
msleep(1);
/* bring phy back */
- sata_phy_resume(ap);
+ sata_phy_resume(ap, sata_deb_timing_eh);
/* TODO: phy layer with polling, timeouts, etc. */
if (ata_port_offline(ap)) {
sata_scr_write(ap, SCR_ERROR, serror);
/* re-enable interrupts */
- if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */
- ata_irq_on(ap);
+ if (!ap->ops->error_handler) {
+ /* FIXME: hack. create a hook instead */
+ if (ap->ioaddr.ctl_addr)
+ ata_irq_on(ap);
+ }
/* is double-select really necessary? */
if (classes[0] != ATA_DEV_NONE)
{
int rc = -EINVAL;
+ ata_eh_freeze_port(ap);
+
if (probeinit)
probeinit(ap);
if (rc == 0) {
if (postreset)
postreset(ap, classes);
+
+ ata_eh_thaw_port(ap);
+
if (classes[0] == ATA_DEV_UNKNOWN)
rc = -ENODEV;
}
/**
* ata_dev_init_params - Issue INIT DEV PARAMS command
* @dev: Device to which command will be sent
- * @heads: Number of heads
- * @sectors: Number of sectors
+ * @heads: Number of heads (taskfile parameter)
+ * @sectors: Number of sectors (taskfile parameter)
*
* LOCKING:
* Kernel thread context (may sleep)
if (ap->ops->check_atapi_dma)
rc = ap->ops->check_atapi_dma(qc);
+ /* We don't support polling DMA.
+ * Use PIO if the LLDD handles only interrupts in
+ * the HSM_ST_LAST state and the ATAPI device
+ * generates CDB interrupts.
+ */
+ if ((ap->flags & ATA_FLAG_PIO_POLLING) &&
+ (qc->dev->flags & ATA_DFLAG_CDB_INTR))
+ rc = 1;
+
return rc;
}
/**
return 0;
}
-/**
- * ata_poll_qc_complete - turn irq back on and finish qc
- * @qc: Command to complete
- * @err_mask: ATA status register content
- *
- * LOCKING:
- * None. (grabs host lock)
- */
-
-void ata_poll_qc_complete(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned long flags;
-
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
- ata_irq_on(ap);
- ata_qc_complete(qc);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
-}
-
-/**
- * ata_pio_poll - poll using PIO, depending on current state
- * @qc: qc in progress
- *
- * LOCKING:
- * None. (executing in kernel thread context)
- *
- * RETURNS:
- * timeout value to use
- */
-static unsigned long ata_pio_poll(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- u8 status;
- unsigned int poll_state = HSM_ST_UNKNOWN;
- unsigned int reg_state = HSM_ST_UNKNOWN;
-
- switch (ap->hsm_task_state) {
- case HSM_ST:
- case HSM_ST_POLL:
- poll_state = HSM_ST_POLL;
- reg_state = HSM_ST;
- break;
- case HSM_ST_LAST:
- case HSM_ST_LAST_POLL:
- poll_state = HSM_ST_LAST_POLL;
- reg_state = HSM_ST_LAST;
- break;
- default:
- BUG();
- break;
- }
-
- status = ata_chk_status(ap);
- if (status & ATA_BUSY) {
- if (time_after(jiffies, ap->pio_task_timeout)) {
- qc->err_mask |= AC_ERR_TIMEOUT;
- ap->hsm_task_state = HSM_ST_TMOUT;
- return 0;
- }
- ap->hsm_task_state = poll_state;
- return ATA_SHORT_PAUSE;
- }
-
- ap->hsm_task_state = reg_state;
- return 0;
-}
-
-/**
- * ata_pio_complete - check if drive is busy or idle
- * @qc: qc to complete
- *
- * LOCKING:
- * None. (executing in kernel thread context)
- *
- * RETURNS:
- * Non-zero if qc completed, zero otherwise.
- */
-static int ata_pio_complete(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- u8 drv_stat;
-
- /*
- * This is purely heuristic. This is a fast path. Sometimes when
- * we enter, BSY will be cleared in a chk-status or two. If not,
- * the drive is probably seeking or something. Snooze for a couple
- * msecs, then chk-status again. If still busy, fall back to
- * HSM_ST_POLL state.
- */
- drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
- if (drv_stat & ATA_BUSY) {
- msleep(2);
- drv_stat = ata_busy_wait(ap, ATA_BUSY, 10);
- if (drv_stat & ATA_BUSY) {
- ap->hsm_task_state = HSM_ST_LAST_POLL;
- ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
- return 0;
- }
- }
-
- drv_stat = ata_wait_idle(ap);
- if (!ata_ok(drv_stat)) {
- qc->err_mask |= __ac_err_mask(drv_stat);
- ap->hsm_task_state = HSM_ST_ERR;
- return 0;
- }
-
- ap->hsm_task_state = HSM_ST_IDLE;
-
- WARN_ON(qc->err_mask);
- ata_poll_qc_complete(qc);
-
- /* another command may start at this point */
-
- return 1;
-}
-
-
/**
* swap_buf_le16 - swap halves of 16-bit words in place
* @buf: Buffer to swap
/**
* ata_mmio_data_xfer - Transfer data by MMIO
- * @ap: port to read/write
+ * @dev: device for this I/O
* @buf: data buffer
* @buflen: buffer length
* @write_data: read/write
* Inherited from caller.
*/
-static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf,
- unsigned int buflen, int write_data)
+void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
+ unsigned int buflen, int write_data)
{
+ struct ata_port *ap = adev->ap;
unsigned int i;
unsigned int words = buflen >> 1;
u16 *buf16 = (u16 *) buf;
/**
* ata_pio_data_xfer - Transfer data by PIO
- * @ap: port to read/write
+ * @adev: device to target
* @buf: data buffer
* @buflen: buffer length
* @write_data: read/write
* Inherited from caller.
*/
-static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf,
- unsigned int buflen, int write_data)
+void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
+ unsigned int buflen, int write_data)
{
+ struct ata_port *ap = adev->ap;
unsigned int words = buflen >> 1;
/* Transfer multiple of 2 bytes */
}
/**
- * ata_data_xfer - Transfer data from/to the data register.
- * @ap: port to read/write
+ * ata_pio_data_xfer_noirq - Transfer data by PIO
+ * @adev: device to target
* @buf: data buffer
* @buflen: buffer length
- * @do_write: read/write
+ * @write_data: read/write
*
- * Transfer data from/to the device data register.
+ * Transfer data from/to the device data register by PIO. Do the
+ * transfer with interrupts disabled.
*
* LOCKING:
* Inherited from caller.
*/
-static void ata_data_xfer(struct ata_port *ap, unsigned char *buf,
- unsigned int buflen, int do_write)
+void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
+ unsigned int buflen, int write_data)
{
- /* Make the crap hardware pay the costs not the good stuff */
- if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) {
- unsigned long flags;
- local_irq_save(flags);
- if (ap->flags & ATA_FLAG_MMIO)
- ata_mmio_data_xfer(ap, buf, buflen, do_write);
- else
- ata_pio_data_xfer(ap, buf, buflen, do_write);
- local_irq_restore(flags);
- } else {
- if (ap->flags & ATA_FLAG_MMIO)
- ata_mmio_data_xfer(ap, buf, buflen, do_write);
- else
- ata_pio_data_xfer(ap, buf, buflen, do_write);
- }
+ unsigned long flags;
+ local_irq_save(flags);
+ ata_pio_data_xfer(adev, buf, buflen, write_data);
+ local_irq_restore(flags);
}
+
/**
* ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
* @qc: Command on going
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;
- buf = kmap(page) + offset;
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+
+ if (PageHighMem(page)) {
+ unsigned long flags;
+
+ /* FIXME: use a bounce buffer */
+ local_irq_save(flags);
+ buf = kmap_atomic(page, KM_IRQ0);
+
+ /* do the actual data transfer */
+ ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
+
+ kunmap_atomic(buf, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(page);
+ ap->ops->data_xfer(qc->dev, buf + offset, ATA_SECT_SIZE, do_write);
+ }
qc->cursect++;
qc->cursg_ofs++;
qc->cursg++;
qc->cursg_ofs = 0;
}
-
- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
-
- /* do the actual data transfer */
- do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
- ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
-
- kunmap(page);
}
/**
- * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
+ * ata_pio_sectors - Transfer one or many 512-byte sectors.
* @qc: Command on going
- * @bytes: number of bytes
*
- * Transfer Transfer data from/to the ATAPI device.
+ * Transfer one or many ATA_SECT_SIZE of data from/to the
+ * ATA device for the DRQ request.
*
* LOCKING:
* Inherited from caller.
- *
*/
-static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
+static void ata_pio_sectors(struct ata_queued_cmd *qc)
{
- int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
- struct scatterlist *sg = qc->__sg;
- struct ata_port *ap = qc->ap;
- struct page *page;
- unsigned char *buf;
- unsigned int offset, count;
+ if (is_multi_taskfile(&qc->tf)) {
+ /* READ/WRITE MULTIPLE */
+ unsigned int nsect;
- if (qc->curbytes + bytes >= qc->nbytes)
- ap->hsm_task_state = HSM_ST_LAST;
+ WARN_ON(qc->dev->multi_count == 0);
-next_sg:
- if (unlikely(qc->cursg >= qc->n_elem)) {
- /*
- * The end of qc->sg is reached and the device expects
- * more data to transfer. In order not to overrun qc->sg
- * and fulfill length specified in the byte count register,
- * - for read case, discard trailing data from the device
- * - for write case, padding zero data to the device
- */
- u16 pad_buf[1] = { 0 };
- unsigned int words = bytes >> 1;
- unsigned int i;
+ nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
+ while (nsect--)
+ ata_pio_sector(qc);
+ } else
+ ata_pio_sector(qc);
+}
- if (words) /* warning if bytes > 1 */
- ata_dev_printk(qc->dev, KERN_WARNING,
- "%u bytes trailing data\n", bytes);
+/**
+ * atapi_send_cdb - Write CDB bytes to hardware
+ * @ap: Port to which ATAPI device is attached.
+ * @qc: Taskfile currently active
+ *
+ * When device has indicated its readiness to accept
+ * a CDB, this function is called. Send the CDB.
+ *
+ * LOCKING:
+ * caller.
+ */
+
+static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
+{
+ /* send SCSI cdb */
+ DPRINTK("send cdb\n");
+ WARN_ON(qc->dev->cdb_len < 12);
+
+ ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1);
+ ata_altstatus(ap); /* flush */
+
+ switch (qc->tf.protocol) {
+ case ATA_PROT_ATAPI:
+ ap->hsm_task_state = HSM_ST;
+ break;
+ case ATA_PROT_ATAPI_NODATA:
+ ap->hsm_task_state = HSM_ST_LAST;
+ break;
+ case ATA_PROT_ATAPI_DMA:
+ ap->hsm_task_state = HSM_ST_LAST;
+ /* initiate bmdma */
+ ap->ops->bmdma_start(qc);
+ break;
+ }
+}
+
+/**
+ * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
+ * @qc: Command on going
+ * @bytes: number of bytes
+ *
+ * Transfer Transfer data from/to the ATAPI device.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ */
+
+static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
+{
+ int do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
+ struct scatterlist *sg = qc->__sg;
+ struct ata_port *ap = qc->ap;
+ struct page *page;
+ unsigned char *buf;
+ unsigned int offset, count;
+
+ if (qc->curbytes + bytes >= qc->nbytes)
+ ap->hsm_task_state = HSM_ST_LAST;
+
+next_sg:
+ if (unlikely(qc->cursg >= qc->n_elem)) {
+ /*
+ * The end of qc->sg is reached and the device expects
+ * more data to transfer. In order not to overrun qc->sg
+ * and fulfill length specified in the byte count register,
+ * - for read case, discard trailing data from the device
+ * - for write case, padding zero data to the device
+ */
+ u16 pad_buf[1] = { 0 };
+ unsigned int words = bytes >> 1;
+ unsigned int i;
+
+ if (words) /* warning if bytes > 1 */
+ ata_dev_printk(qc->dev, KERN_WARNING,
+ "%u bytes trailing data\n", bytes);
for (i = 0; i < words; i++)
- ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write);
+ ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write);
ap->hsm_task_state = HSM_ST_LAST;
return;
/* don't cross page boundaries */
count = min(count, (unsigned int)PAGE_SIZE - offset);
- buf = kmap(page) + offset;
+ DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+
+ if (PageHighMem(page)) {
+ unsigned long flags;
+
+ /* FIXME: use bounce buffer */
+ local_irq_save(flags);
+ buf = kmap_atomic(page, KM_IRQ0);
+
+ /* do the actual data transfer */
+ ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
+
+ kunmap_atomic(buf, KM_IRQ0);
+ local_irq_restore(flags);
+ } else {
+ buf = page_address(page);
+ ap->ops->data_xfer(qc->dev, buf + offset, count, do_write);
+ }
bytes -= count;
qc->curbytes += count;
qc->cursg_ofs = 0;
}
- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
-
- /* do the actual data transfer */
- ata_data_xfer(ap, buf, count, do_write);
-
- kunmap(page);
-
if (bytes)
goto next_sg;
}
unsigned int ireason, bc_lo, bc_hi, bytes;
int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0;
- ap->ops->tf_read(ap, &qc->tf);
- ireason = qc->tf.nsect;
- bc_lo = qc->tf.lbam;
- bc_hi = qc->tf.lbah;
+ /* Abuse qc->result_tf for temp storage of intermediate TF
+ * here to save some kernel stack usage.
+ * For normal completion, qc->result_tf is not relevant. For
+ * error, qc->result_tf is later overwritten by ata_qc_complete().
+ * So, the correctness of qc->result_tf is not affected.
+ */
+ ap->ops->tf_read(ap, &qc->result_tf);
+ ireason = qc->result_tf.nsect;
+ bc_lo = qc->result_tf.lbam;
+ bc_hi = qc->result_tf.lbah;
bytes = (bc_hi << 8) | bc_lo;
/* shall be cleared to zero, indicating xfer of data */
if (do_write != i_write)
goto err_out;
+ VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes);
+
__atapi_pio_bytes(qc, bytes);
return;
}
/**
- * ata_pio_block - start PIO on a block
- * @qc: qc to transfer block for
+ * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
+ * @ap: the target ata_port
+ * @qc: qc on going
+ *
+ * RETURNS:
+ * 1 if ok in workqueue, 0 otherwise.
+ */
+
+static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
+{
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ return 1;
+
+ if (ap->hsm_task_state == HSM_ST_FIRST) {
+ if (qc->tf.protocol == ATA_PROT_PIO &&
+ (qc->tf.flags & ATA_TFLAG_WRITE))
+ return 1;
+
+ if (is_atapi_taskfile(&qc->tf) &&
+ !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
+ return 1;
+ }
+
+ return 0;
+}
+
+/**
+ * ata_hsm_qc_complete - finish a qc running on standard HSM
+ * @qc: Command to complete
+ * @in_wq: 1 if called from workqueue, 0 otherwise
+ *
+ * Finish @qc which is running on standard HSM.
*
* LOCKING:
- * None. (executing in kernel thread context)
+ * If @in_wq is zero, spin_lock_irqsave(host_set lock).
+ * Otherwise, none on entry and grabs host lock.
*/
-static void ata_pio_block(struct ata_queued_cmd *qc)
+static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
{
struct ata_port *ap = qc->ap;
- u8 status;
+ unsigned long flags;
- /*
- * This is purely heuristic. This is a fast path.
- * Sometimes when we enter, BSY will be cleared in
- * a chk-status or two. If not, the drive is probably seeking
- * or something. Snooze for a couple msecs, then
- * chk-status again. If still busy, fall back to
- * HSM_ST_POLL state.
- */
- status = ata_busy_wait(ap, ATA_BUSY, 5);
- if (status & ATA_BUSY) {
- msleep(2);
- status = ata_busy_wait(ap, ATA_BUSY, 10);
- if (status & ATA_BUSY) {
- ap->hsm_task_state = HSM_ST_POLL;
- ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO;
- return;
+ if (ap->ops->error_handler) {
+ if (in_wq) {
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+
+ /* EH might have kicked in while host_set lock
+ * is released.
+ */
+ qc = ata_qc_from_tag(ap, qc->tag);
+ if (qc) {
+ if (likely(!(qc->err_mask & AC_ERR_HSM))) {
+ ata_irq_on(ap);
+ ata_qc_complete(qc);
+ } else
+ ata_port_freeze(ap);
+ }
+
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ } else {
+ if (likely(!(qc->err_mask & AC_ERR_HSM)))
+ ata_qc_complete(qc);
+ else
+ ata_port_freeze(ap);
}
+ } else {
+ if (in_wq) {
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ata_irq_on(ap);
+ ata_qc_complete(qc);
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ } else
+ ata_qc_complete(qc);
}
- /* check error */
- if (status & (ATA_ERR | ATA_DF)) {
- qc->err_mask |= AC_ERR_DEV;
- ap->hsm_task_state = HSM_ST_ERR;
- return;
- }
+ ata_altstatus(ap); /* flush */
+}
- /* transfer data if any */
- if (is_atapi_taskfile(&qc->tf)) {
- /* DRQ=0 means no more data to transfer */
- if ((status & ATA_DRQ) == 0) {
- ap->hsm_task_state = HSM_ST_LAST;
- return;
+/**
+ * ata_hsm_move - move the HSM to the next state.
+ * @ap: the target ata_port
+ * @qc: qc on going
+ * @status: current device status
+ * @in_wq: 1 if called from workqueue, 0 otherwise
+ *
+ * RETURNS:
+ * 1 when poll next status needed, 0 otherwise.
+ */
+int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
+ u8 status, int in_wq)
+{
+ unsigned long flags = 0;
+ int poll_next;
+
+ WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
+
+ /* Make sure ata_qc_issue_prot() does not throw things
+ * like DMA polling into the workqueue. Notice that
+ * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
+ */
+ WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
+
+fsm_start:
+ DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
+ ap->id, qc->tf.protocol, ap->hsm_task_state, status);
+
+ switch (ap->hsm_task_state) {
+ case HSM_ST_FIRST:
+ /* Send first data block or PACKET CDB */
+
+ /* If polling, we will stay in the work queue after
+ * sending the data. Otherwise, interrupt handler
+ * takes over after sending the data.
+ */
+ poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);
+
+ /* check device status */
+ if (unlikely((status & ATA_DRQ) == 0)) {
+ /* handle BSY=0, DRQ=0 as error */
+ if (likely(status & (ATA_ERR | ATA_DF)))
+ /* device stops HSM for abort/error */
+ qc->err_mask |= AC_ERR_DEV;
+ else
+ /* HSM violation. Let EH handle this */
+ qc->err_mask |= AC_ERR_HSM;
+
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
}
- atapi_pio_bytes(qc);
- } else {
- /* handle BSY=0, DRQ=0 as error */
- if ((status & ATA_DRQ) == 0) {
+ /* Device should not ask for data transfer (DRQ=1)
+ * when it finds something wrong.
+ * We ignore DRQ here and stop the HSM by
+ * changing hsm_task_state to HSM_ST_ERR and
+ * let the EH abort the command or reset the device.
+ */
+ if (unlikely(status & (ATA_ERR | ATA_DF))) {
+ printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
+ ap->id, status);
qc->err_mask |= AC_ERR_HSM;
ap->hsm_task_state = HSM_ST_ERR;
- return;
+ goto fsm_start;
}
- ata_pio_sector(qc);
- }
-}
+ /* Send the CDB (atapi) or the first data block (ata pio out).
+ * During the state transition, interrupt handler shouldn't
+ * be invoked before the data transfer is complete and
+ * hsm_task_state is changed. Hence, the following locking.
+ */
+ if (in_wq)
+ spin_lock_irqsave(&ap->host_set->lock, flags);
-static void ata_pio_error(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
+ if (qc->tf.protocol == ATA_PROT_PIO) {
+ /* PIO data out protocol.
+ * send first data block.
+ */
- if (qc->tf.command != ATA_CMD_PACKET)
- ata_dev_printk(qc->dev, KERN_WARNING, "PIO error\n");
+ /* ata_pio_sectors() might change the state
+ * to HSM_ST_LAST. so, the state is changed here
+ * before ata_pio_sectors().
+ */
+ ap->hsm_task_state = HSM_ST;
+ ata_pio_sectors(qc);
+ ata_altstatus(ap); /* flush */
+ } else
+ /* send CDB */
+ atapi_send_cdb(ap, qc);
+
+ if (in_wq)
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ /* if polling, ata_pio_task() handles the rest.
+ * otherwise, interrupt handler takes over from here.
+ */
+ break;
- /* make sure qc->err_mask is available to
- * know what's wrong and recover
- */
- WARN_ON(qc->err_mask == 0);
+ case HSM_ST:
+ /* complete command or read/write the data register */
+ if (qc->tf.protocol == ATA_PROT_ATAPI) {
+ /* ATAPI PIO protocol */
+ if ((status & ATA_DRQ) == 0) {
+ /* No more data to transfer or device error.
+ * Device error will be tagged in HSM_ST_LAST.
+ */
+ ap->hsm_task_state = HSM_ST_LAST;
+ goto fsm_start;
+ }
- ap->hsm_task_state = HSM_ST_IDLE;
+ /* Device should not ask for data transfer (DRQ=1)
+ * when it finds something wrong.
+ * We ignore DRQ here and stop the HSM by
+ * changing hsm_task_state to HSM_ST_ERR and
+ * let the EH abort the command or reset the device.
+ */
+ if (unlikely(status & (ATA_ERR | ATA_DF))) {
+ printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n",
+ ap->id, status);
+ qc->err_mask |= AC_ERR_HSM;
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
- ata_poll_qc_complete(qc);
-}
+ atapi_pio_bytes(qc);
-static void ata_pio_task(void *_data)
-{
- struct ata_queued_cmd *qc = _data;
- struct ata_port *ap = qc->ap;
- unsigned long timeout;
- int qc_completed;
+ if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
+ /* bad ireason reported by device */
+ goto fsm_start;
-fsm_start:
- timeout = 0;
- qc_completed = 0;
+ } else {
+ /* ATA PIO protocol */
+ if (unlikely((status & ATA_DRQ) == 0)) {
+ /* handle BSY=0, DRQ=0 as error */
+ if (likely(status & (ATA_ERR | ATA_DF)))
+ /* device stops HSM for abort/error */
+ qc->err_mask |= AC_ERR_DEV;
+ else
+ /* HSM violation. Let EH handle this */
+ qc->err_mask |= AC_ERR_HSM;
+
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
- switch (ap->hsm_task_state) {
- case HSM_ST_IDLE:
- return;
+ /* For PIO reads, some devices may ask for
+ * data transfer (DRQ=1) alone with ERR=1.
+ * We respect DRQ here and transfer one
+ * block of junk data before changing the
+ * hsm_task_state to HSM_ST_ERR.
+ *
+ * For PIO writes, ERR=1 DRQ=1 doesn't make
+ * sense since the data block has been
+ * transferred to the device.
+ */
+ if (unlikely(status & (ATA_ERR | ATA_DF))) {
+ /* data might be corrputed */
+ qc->err_mask |= AC_ERR_DEV;
+
+ if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
+ ata_pio_sectors(qc);
+ ata_altstatus(ap);
+ status = ata_wait_idle(ap);
+ }
+
+ if (status & (ATA_BUSY | ATA_DRQ))
+ qc->err_mask |= AC_ERR_HSM;
+
+ /* ata_pio_sectors() might change the
+ * state to HSM_ST_LAST. so, the state
+ * is changed after ata_pio_sectors().
+ */
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
- case HSM_ST:
- ata_pio_block(qc);
+ ata_pio_sectors(qc);
+
+ if (ap->hsm_task_state == HSM_ST_LAST &&
+ (!(qc->tf.flags & ATA_TFLAG_WRITE))) {
+ /* all data read */
+ ata_altstatus(ap);
+ status = ata_wait_idle(ap);
+ goto fsm_start;
+ }
+ }
+
+ ata_altstatus(ap); /* flush */
+ poll_next = 1;
break;
case HSM_ST_LAST:
- qc_completed = ata_pio_complete(qc);
- break;
+ if (unlikely(!ata_ok(status))) {
+ qc->err_mask |= __ac_err_mask(status);
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
+
+ /* no more data to transfer */
+ DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
+ ap->id, qc->dev->devno, status);
+
+ WARN_ON(qc->err_mask);
+
+ ap->hsm_task_state = HSM_ST_IDLE;
+
+ /* complete taskfile transaction */
+ ata_hsm_qc_complete(qc, in_wq);
- case HSM_ST_POLL:
- case HSM_ST_LAST_POLL:
- timeout = ata_pio_poll(qc);
+ poll_next = 0;
break;
- case HSM_ST_TMOUT:
case HSM_ST_ERR:
- ata_pio_error(qc);
- return;
+ /* make sure qc->err_mask is available to
+ * know what's wrong and recover
+ */
+ WARN_ON(qc->err_mask == 0);
+
+ ap->hsm_task_state = HSM_ST_IDLE;
+
+ /* complete taskfile transaction */
+ ata_hsm_qc_complete(qc, in_wq);
+
+ poll_next = 0;
+ break;
+ default:
+ poll_next = 0;
+ BUG();
}
- if (timeout)
- ata_port_queue_task(ap, ata_pio_task, qc, timeout);
- else if (!qc_completed)
- goto fsm_start;
+ return poll_next;
}
-/**
- * atapi_packet_task - Write CDB bytes to hardware
- * @_data: qc in progress
- *
- * When device has indicated its readiness to accept
- * a CDB, this function is called. Send the CDB.
- * If DMA is to be performed, exit immediately.
- * Otherwise, we are in polling mode, so poll
- * status under operation succeeds or fails.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- */
-static void atapi_packet_task(void *_data)
+static void ata_pio_task(void *_data)
{
struct ata_queued_cmd *qc = _data;
struct ata_port *ap = qc->ap;
u8 status;
+ int poll_next;
- /* sleep-wait for BSY to clear */
- DPRINTK("busy wait\n");
- if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
- qc->err_mask |= AC_ERR_TIMEOUT;
- goto err_out;
- }
-
- /* make sure DRQ is set */
- status = ata_chk_status(ap);
- if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
- qc->err_mask |= AC_ERR_HSM;
- goto err_out;
- }
-
- /* send SCSI cdb */
- DPRINTK("send cdb\n");
- WARN_ON(qc->dev->cdb_len < 12);
-
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
- qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
- unsigned long flags;
-
- /* Once we're done issuing command and kicking bmdma,
- * irq handler takes over. To not lose irq, we need
- * to clear NOINTR flag before sending cdb, but
- * interrupt handler shouldn't be invoked before we're
- * finished. Hence, the following locking.
- */
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
- ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
- ap->ops->bmdma_start(qc); /* initiate bmdma */
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
- } else {
- ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+fsm_start:
+ WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
- /* PIO commands are handled by polling */
- ap->hsm_task_state = HSM_ST;
- ata_port_queue_task(ap, ata_pio_task, qc, 0);
+ /*
+ * This is purely heuristic. This is a fast path.
+ * Sometimes when we enter, BSY will be cleared in
+ * a chk-status or two. If not, the drive is probably seeking
+ * or something. Snooze for a couple msecs, then
+ * chk-status again. If still busy, queue delayed work.
+ */
+ status = ata_busy_wait(ap, ATA_BUSY, 5);
+ if (status & ATA_BUSY) {
+ msleep(2);
+ status = ata_busy_wait(ap, ATA_BUSY, 10);
+ if (status & ATA_BUSY) {
+ ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE);
+ return;
+ }
}
- return;
+ /* move the HSM */
+ poll_next = ata_hsm_move(ap, qc, status, 1);
-err_out:
- ata_poll_qc_complete(qc);
+ /* another command or interrupt handler
+ * may be running at this point.
+ */
+ if (poll_next)
+ goto fsm_start;
}
/**
struct ata_queued_cmd *qc = NULL;
unsigned int i;
+ /* no command while frozen */
+ if (unlikely(ap->flags & ATA_FLAG_FROZEN))
+ return NULL;
+
/* the last tag is reserved for internal command. */
for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
- if (!test_and_set_bit(i, &ap->qactive)) {
+ if (!test_and_set_bit(i, &ap->qc_allocated)) {
qc = __ata_qc_from_tag(ap, i);
break;
}
tag = qc->tag;
if (likely(ata_tag_valid(tag))) {
qc->tag = ATA_TAG_POISON;
- clear_bit(tag, &ap->qactive);
+ clear_bit(tag, &ap->qc_allocated);
}
}
void __ata_qc_complete(struct ata_queued_cmd *qc)
{
+ struct ata_port *ap = qc->ap;
+
WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
ata_sg_clean(qc);
/* command should be marked inactive atomically with qc completion */
- qc->ap->active_tag = ATA_TAG_POISON;
+ if (qc->tf.protocol == ATA_PROT_NCQ)
+ ap->sactive &= ~(1 << qc->tag);
+ else
+ ap->active_tag = ATA_TAG_POISON;
/* atapi: mark qc as inactive to prevent the interrupt handler
* from completing the command twice later, before the error handler
* is called. (when rc != 0 and atapi request sense is needed)
*/
qc->flags &= ~ATA_QCFLAG_ACTIVE;
+ ap->qc_active &= ~(1 << qc->tag);
/* call completion callback */
qc->complete_fn(qc);
}
+/**
+ * ata_qc_complete - Complete an active ATA command
+ * @qc: Command to complete
+ * @err_mask: ATA Status register contents
+ *
+ * Indicate to the mid and upper layers that an ATA
+ * command has completed, with either an ok or not-ok status.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+void ata_qc_complete(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+
+ /* XXX: New EH and old EH use different mechanisms to
+ * synchronize EH with regular execution path.
+ *
+ * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
+ * Normal execution path is responsible for not accessing a
+ * failed qc. libata core enforces the rule by returning NULL
+ * from ata_qc_from_tag() for failed qcs.
+ *
+ * Old EH depends on ata_qc_complete() nullifying completion
+ * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
+ * not synchronize with interrupt handler. Only PIO task is
+ * taken care of.
+ */
+ if (ap->ops->error_handler) {
+ WARN_ON(ap->flags & ATA_FLAG_FROZEN);
+
+ if (unlikely(qc->err_mask))
+ qc->flags |= ATA_QCFLAG_FAILED;
+
+ if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
+ if (!ata_tag_internal(qc->tag)) {
+ /* always fill result TF for failed qc */
+ ap->ops->tf_read(ap, &qc->result_tf);
+ ata_qc_schedule_eh(qc);
+ return;
+ }
+ }
+
+ /* read result TF if requested */
+ if (qc->flags & ATA_QCFLAG_RESULT_TF)
+ ap->ops->tf_read(ap, &qc->result_tf);
+
+ __ata_qc_complete(qc);
+ } else {
+ if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
+ return;
+
+ /* read result TF if failed or requested */
+ if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
+ ap->ops->tf_read(ap, &qc->result_tf);
+
+ __ata_qc_complete(qc);
+ }
+}
+
+/**
+ * ata_qc_complete_multiple - Complete multiple qcs successfully
+ * @ap: port in question
+ * @qc_active: new qc_active mask
+ * @finish_qc: LLDD callback invoked before completing a qc
+ *
+ * Complete in-flight commands. This functions is meant to be
+ * called from low-level driver's interrupt routine to complete
+ * requests normally. ap->qc_active and @qc_active is compared
+ * and commands are completed accordingly.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * Number of completed commands on success, -errno otherwise.
+ */
+int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
+ void (*finish_qc)(struct ata_queued_cmd *))
+{
+ int nr_done = 0;
+ u32 done_mask;
+ int i;
+
+ done_mask = ap->qc_active ^ qc_active;
+
+ if (unlikely(done_mask & qc_active)) {
+ ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
+ "(%08x->%08x)\n", ap->qc_active, qc_active);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ATA_MAX_QUEUE; i++) {
+ struct ata_queued_cmd *qc;
+
+ if (!(done_mask & (1 << i)))
+ continue;
+
+ if ((qc = ata_qc_from_tag(ap, i))) {
+ if (finish_qc)
+ finish_qc(qc);
+ ata_qc_complete(qc);
+ nr_done++;
+ }
+ }
+
+ return nr_done;
+}
+
static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
switch (qc->tf.protocol) {
+ case ATA_PROT_NCQ:
case ATA_PROT_DMA:
case ATA_PROT_ATAPI_DMA:
return 1;
{
struct ata_port *ap = qc->ap;
- qc->ap->active_tag = qc->tag;
+ /* Make sure only one non-NCQ command is outstanding. The
+ * check is skipped for old EH because it reuses active qc to
+ * request ATAPI sense.
+ */
+ WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag));
+
+ if (qc->tf.protocol == ATA_PROT_NCQ) {
+ WARN_ON(ap->sactive & (1 << qc->tag));
+ ap->sactive |= 1 << qc->tag;
+ } else {
+ WARN_ON(ap->sactive);
+ ap->active_tag = qc->tag;
+ }
+
qc->flags |= ATA_QCFLAG_ACTIVE;
+ ap->qc_active |= 1 << qc->tag;
if (ata_should_dma_map(qc)) {
if (qc->flags & ATA_QCFLAG_SG) {
{
struct ata_port *ap = qc->ap;
+ /* Use polling pio if the LLD doesn't handle
+ * interrupt driven pio and atapi CDB interrupt.
+ */
+ if (ap->flags & ATA_FLAG_PIO_POLLING) {
+ switch (qc->tf.protocol) {
+ case ATA_PROT_PIO:
+ case ATA_PROT_ATAPI:
+ case ATA_PROT_ATAPI_NODATA:
+ qc->tf.flags |= ATA_TFLAG_POLLING;
+ break;
+ case ATA_PROT_ATAPI_DMA:
+ if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
+ /* see ata_check_atapi_dma() */
+ BUG();
+ break;
+ default:
+ break;
+ }
+ }
+
+ /* select the device */
ata_dev_select(ap, qc->dev->devno, 1, 0);
+ /* start the command */
switch (qc->tf.protocol) {
case ATA_PROT_NODATA:
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
+
ata_tf_to_host(ap, &qc->tf);
+ ap->hsm_task_state = HSM_ST_LAST;
+
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_port_queue_task(ap, ata_pio_task, qc, 0);
+
break;
case ATA_PROT_DMA:
+ WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
+
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
ap->ops->bmdma_start(qc); /* initiate bmdma */
+ ap->hsm_task_state = HSM_ST_LAST;
break;
- case ATA_PROT_PIO: /* load tf registers, initiate polling pio */
- ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
- ap->hsm_task_state = HSM_ST;
- ata_port_queue_task(ap, ata_pio_task, qc, 0);
- break;
+ case ATA_PROT_PIO:
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
- case ATA_PROT_ATAPI:
- ata_qc_set_polling(qc);
ata_tf_to_host(ap, &qc->tf);
- ata_port_queue_task(ap, atapi_packet_task, qc, 0);
+
+ if (qc->tf.flags & ATA_TFLAG_WRITE) {
+ /* PIO data out protocol */
+ ap->hsm_task_state = HSM_ST_FIRST;
+ ata_port_queue_task(ap, ata_pio_task, qc, 0);
+
+ /* always send first data block using
+ * the ata_pio_task() codepath.
+ */
+ } else {
+ /* PIO data in protocol */
+ ap->hsm_task_state = HSM_ST;
+
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_port_queue_task(ap, ata_pio_task, qc, 0);
+
+ /* if polling, ata_pio_task() handles the rest.
+ * otherwise, interrupt handler takes over from here.
+ */
+ }
+
break;
+ case ATA_PROT_ATAPI:
case ATA_PROT_ATAPI_NODATA:
- ap->flags |= ATA_FLAG_NOINTR;
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ ata_qc_set_polling(qc);
+
ata_tf_to_host(ap, &qc->tf);
- ata_port_queue_task(ap, atapi_packet_task, qc, 0);
+
+ ap->hsm_task_state = HSM_ST_FIRST;
+
+ /* send cdb by polling if no cdb interrupt */
+ if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) ||
+ (qc->tf.flags & ATA_TFLAG_POLLING))
+ ata_port_queue_task(ap, ata_pio_task, qc, 0);
break;
case ATA_PROT_ATAPI_DMA:
- ap->flags |= ATA_FLAG_NOINTR;
+ WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING);
+
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
- ata_port_queue_task(ap, atapi_packet_task, qc, 0);
+ ap->hsm_task_state = HSM_ST_FIRST;
+
+ /* send cdb by polling if no cdb interrupt */
+ if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
+ ata_port_queue_task(ap, ata_pio_task, qc, 0);
break;
default:
inline unsigned int ata_host_intr (struct ata_port *ap,
struct ata_queued_cmd *qc)
{
- u8 status, host_stat;
-
- switch (qc->tf.protocol) {
-
- case ATA_PROT_DMA:
- case ATA_PROT_ATAPI_DMA:
- case ATA_PROT_ATAPI:
- /* check status of DMA engine */
- host_stat = ap->ops->bmdma_status(ap);
- VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
-
- /* if it's not our irq... */
- if (!(host_stat & ATA_DMA_INTR))
- goto idle_irq;
+ u8 status, host_stat = 0;
- /* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(qc);
+ VPRINTK("ata%u: protocol %d task_state %d\n",
+ ap->id, qc->tf.protocol, ap->hsm_task_state);
- /* fall through */
-
- case ATA_PROT_ATAPI_NODATA:
- case ATA_PROT_NODATA:
- /* check altstatus */
- status = ata_altstatus(ap);
- if (status & ATA_BUSY)
- goto idle_irq;
+ /* Check whether we are expecting interrupt in this state */
+ switch (ap->hsm_task_state) {
+ case HSM_ST_FIRST:
+ /* Some pre-ATAPI-4 devices assert INTRQ
+ * at this state when ready to receive CDB.
+ */
- /* check main status, clearing INTRQ */
- status = ata_chk_status(ap);
- if (unlikely(status & ATA_BUSY))
+ /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
+ * The flag was turned on only for atapi devices.
+ * No need to check is_atapi_taskfile(&qc->tf) again.
+ */
+ if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR))
goto idle_irq;
- DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
- ap->id, qc->tf.protocol, status);
-
- /* ack bmdma irq events */
- ap->ops->irq_clear(ap);
-
- /* complete taskfile transaction */
- qc->err_mask |= ac_err_mask(status);
- ata_qc_complete(qc);
break;
-
+ case HSM_ST_LAST:
+ if (qc->tf.protocol == ATA_PROT_DMA ||
+ qc->tf.protocol == ATA_PROT_ATAPI_DMA) {
+ /* check status of DMA engine */
+ host_stat = ap->ops->bmdma_status(ap);
+ VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat);
+
+ /* if it's not our irq... */
+ if (!(host_stat & ATA_DMA_INTR))
+ goto idle_irq;
+
+ /* before we do anything else, clear DMA-Start bit */
+ ap->ops->bmdma_stop(qc);
+
+ if (unlikely(host_stat & ATA_DMA_ERR)) {
+ /* error when transfering data to/from memory */
+ qc->err_mask |= AC_ERR_HOST_BUS;
+ ap->hsm_task_state = HSM_ST_ERR;
+ }
+ }
+ break;
+ case HSM_ST:
+ break;
default:
goto idle_irq;
}
+ /* check altstatus */
+ status = ata_altstatus(ap);
+ if (status & ATA_BUSY)
+ goto idle_irq;
+
+ /* check main status, clearing INTRQ */
+ status = ata_chk_status(ap);
+ if (unlikely(status & ATA_BUSY))
+ goto idle_irq;
+
+ /* ack bmdma irq events */
+ ap->ops->irq_clear(ap);
+
+ ata_hsm_move(ap, qc, status, 0);
return 1; /* irq handled */
idle_irq:
ap = host_set->ports[i];
if (ap &&
- !(ap->flags & (ATA_FLAG_DISABLED | ATA_FLAG_NOINTR))) {
+ !(ap->flags & ATA_FLAG_DISABLED)) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
+ if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) &&
(qc->flags & ATA_QCFLAG_ACTIVE))
handled |= ata_host_intr(ap, qc);
}
if (ap->flags & ATA_FLAG_SUSPENDED) {
struct ata_device *failed_dev;
+
+ ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
+
ap->flags &= ~ATA_FLAG_SUSPENDED;
while (ata_set_mode(ap, &failed_dev))
ata_dev_disable(failed_dev);
/**
* ata_device_suspend - prepare a device for suspend
* @dev: the device to suspend
+ * @state: target power management state
*
* Flush the cache on the drive, if appropriate, then issue a
* standbynow command.
ap->ops->port_stop(ap);
}
+/**
+ * ata_dev_init - Initialize an ata_device structure
+ * @dev: Device structure to initialize
+ *
+ * Initialize @dev in preparation for probing.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+void ata_dev_init(struct ata_device *dev)
+{
+ struct ata_port *ap = dev->ap;
+ unsigned long flags;
+
+ /* SATA spd limit is bound to the first device */
+ ap->sata_spd_limit = ap->hw_sata_spd_limit;
+
+ /* High bits of dev->flags are used to record warm plug
+ * requests which occur asynchronously. Synchronize using
+ * host_set lock.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ dev->flags &= ~ATA_DFLAG_INIT_MASK;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
+ sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
+ dev->pio_mask = UINT_MAX;
+ dev->mwdma_mask = UINT_MAX;
+ dev->udma_mask = UINT_MAX;
+}
+
/**
* ata_host_init - Initialize an ata_port structure
* @ap: Structure to initialize
* LOCKING:
* Inherited from caller.
*/
-
static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
struct ata_host_set *host_set,
const struct ata_probe_ent *ent, unsigned int port_no)
ap->udma_mask = ent->udma_mask;
ap->flags |= ent->host_flags;
ap->ops = ent->port_ops;
- ap->sata_spd_limit = UINT_MAX;
+ ap->hw_sata_spd_limit = UINT_MAX;
ap->active_tag = ATA_TAG_POISON;
ap->last_ctl = 0xFF;
+ ap->msg_enable = ATA_MSG_DRV;
INIT_WORK(&ap->port_task, NULL, NULL);
+ INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
INIT_LIST_HEAD(&ap->eh_done_q);
+ init_waitqueue_head(&ap->eh_wait_q);
/* set cable type */
ap->cbl = ATA_CBL_NONE;
struct ata_device *dev = &ap->device[i];
dev->ap = ap;
dev->devno = i;
- dev->pio_mask = UINT_MAX;
- dev->mwdma_mask = UINT_MAX;
- dev->udma_mask = UINT_MAX;
+ ata_dev_init(dev);
}
#ifdef ATA_IRQ_TRAP
DPRINTK("ENTER\n");
- if (!ent->port_ops->probe_reset &&
+ if (!ent->port_ops->probe_reset && !ent->port_ops->error_handler &&
!(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
printk(KERN_ERR "ata%u: no reset mechanism available\n",
port_no);
* RETURNS:
* Number of ports registered. Zero on error (no ports registered).
*/
-
int ata_device_add(const struct ata_probe_ent *ent)
{
unsigned int count = 0, i;
ata_chk_status(ap);
host_set->ops->irq_clear(ap);
+ ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
count++;
}
DPRINTK("probe begin\n");
for (i = 0; i < count; i++) {
struct ata_port *ap;
+ u32 scontrol;
int rc;
ap = host_set->ports[i];
- DPRINTK("ata%u: bus probe begin\n", ap->id);
- rc = ata_bus_probe(ap);
- DPRINTK("ata%u: bus probe end\n", ap->id);
-
- if (rc) {
- /* FIXME: do something useful here?
- * Current libata behavior will
- * tear down everything when
- * the module is removed
- * or the h/w is unplugged.
- */
+ /* init sata_spd_limit to the current value */
+ if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
+ int spd = (scontrol >> 4) & 0xf;
+ ap->hw_sata_spd_limit &= (1 << spd) - 1;
}
+ ap->sata_spd_limit = ap->hw_sata_spd_limit;
rc = scsi_add_host(ap->host, dev);
if (rc) {
* at the very least
*/
}
+
+ if (!ap->ops->probe_reset) {
+ unsigned long flags;
+
+ ata_port_probe(ap);
+
+ /* kick EH for boot probing */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+
+ ap->eh_info.probe_mask = (1 << ATA_MAX_DEVICES) - 1;
+ ap->eh_info.action |= ATA_EH_SOFTRESET;
+
+ ap->flags |= ATA_FLAG_LOADING;
+ ata_port_schedule_eh(ap);
+
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ /* wait for EH to finish */
+ ata_port_wait_eh(ap);
+ } else {
+ DPRINTK("ata%u: bus probe begin\n", ap->id);
+ rc = ata_bus_probe(ap);
+ DPRINTK("ata%u: bus probe end\n", ap->id);
+
+ if (rc) {
+ /* FIXME: do something useful here?
+ * Current libata behavior will
+ * tear down everything when
+ * the module is removed
+ * or the h/w is unplugged.
+ */
+ }
+ }
}
/* probes are done, now scan each port's disk(s) */
return 0;
}
+/**
+ * ata_port_detach - Detach ATA port in prepration of device removal
+ * @ap: ATA port to be detached
+ *
+ * Detach all ATA devices and the associated SCSI devices of @ap;
+ * then, remove the associated SCSI host. @ap is guaranteed to
+ * be quiescent on return from this function.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+void ata_port_detach(struct ata_port *ap)
+{
+ unsigned long flags;
+ int i;
+
+ if (!ap->ops->error_handler)
+ return;
+
+ /* tell EH we're leaving & flush EH */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags |= ATA_FLAG_UNLOADING;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ ata_port_wait_eh(ap);
+
+ /* EH is now guaranteed to see UNLOADING, so no new device
+ * will be attached. Disable all existing devices.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ ata_dev_disable(&ap->device[i]);
+
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ /* Final freeze & EH. All in-flight commands are aborted. EH
+ * will be skipped and retrials will be terminated with bad
+ * target.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ata_port_freeze(ap); /* won't be thawed */
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ ata_port_wait_eh(ap);
+
+ /* Flush hotplug task. The sequence is similar to
+ * ata_port_flush_task().
+ */
+ flush_workqueue(ata_aux_wq);
+ cancel_delayed_work(&ap->hotplug_task);
+ flush_workqueue(ata_aux_wq);
+
+ /* remove the associated SCSI host */
+ scsi_remove_host(ap->host);
+}
+
/**
* ata_host_set_remove - PCI layer callback for device removal
* @host_set: ATA host set that was removed
void ata_host_set_remove(struct ata_host_set *host_set)
{
- struct ata_port *ap;
unsigned int i;
- for (i = 0; i < host_set->n_ports; i++) {
- ap = host_set->ports[i];
- scsi_remove_host(ap->host);
- }
+ for (i = 0; i < host_set->n_ports; i++)
+ ata_port_detach(host_set->ports[i]);
free_irq(host_set->irq, host_set);
for (i = 0; i < host_set->n_ports; i++) {
- ap = host_set->ports[i];
+ struct ata_port *ap = host_set->ports[i];
ata_scsi_release(ap->host);
if (!ata_wq)
return -ENOMEM;
+ ata_aux_wq = create_singlethread_workqueue("ata_aux");
+ if (!ata_aux_wq) {
+ destroy_workqueue(ata_wq);
+ return -ENOMEM;
+ }
+
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
return 0;
}
static void __exit ata_exit(void)
{
destroy_workqueue(ata_wq);
+ destroy_workqueue(ata_aux_wq);
}
module_init(ata_init);
* Do not depend on ABI/API stability.
*/
+EXPORT_SYMBOL_GPL(sata_deb_timing_boot);
+EXPORT_SYMBOL_GPL(sata_deb_timing_eh);
+EXPORT_SYMBOL_GPL(sata_deb_timing_before_fsrst);
EXPORT_SYMBOL_GPL(ata_std_bios_param);
EXPORT_SYMBOL_GPL(ata_std_ports);
EXPORT_SYMBOL_GPL(ata_device_add);
+EXPORT_SYMBOL_GPL(ata_port_detach);
EXPORT_SYMBOL_GPL(ata_host_set_remove);
EXPORT_SYMBOL_GPL(ata_sg_init);
EXPORT_SYMBOL_GPL(ata_sg_init_one);
-EXPORT_SYMBOL_GPL(__ata_qc_complete);
+EXPORT_SYMBOL_GPL(ata_hsm_move);
+EXPORT_SYMBOL_GPL(ata_qc_complete);
+EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
EXPORT_SYMBOL_GPL(ata_qc_issue_prot);
EXPORT_SYMBOL_GPL(ata_tf_load);
EXPORT_SYMBOL_GPL(ata_tf_read);
EXPORT_SYMBOL_GPL(ata_port_stop);
EXPORT_SYMBOL_GPL(ata_host_stop);
EXPORT_SYMBOL_GPL(ata_interrupt);
+EXPORT_SYMBOL_GPL(ata_mmio_data_xfer);
+EXPORT_SYMBOL_GPL(ata_pio_data_xfer);
+EXPORT_SYMBOL_GPL(ata_pio_data_xfer_noirq);
EXPORT_SYMBOL_GPL(ata_qc_prep);
EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
EXPORT_SYMBOL_GPL(ata_bmdma_setup);
EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
EXPORT_SYMBOL_GPL(ata_bmdma_status);
EXPORT_SYMBOL_GPL(ata_bmdma_stop);
+EXPORT_SYMBOL_GPL(ata_bmdma_freeze);
+EXPORT_SYMBOL_GPL(ata_bmdma_thaw);
+EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh);
+EXPORT_SYMBOL_GPL(ata_bmdma_error_handler);
+EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd);
EXPORT_SYMBOL_GPL(ata_port_probe);
EXPORT_SYMBOL_GPL(sata_set_spd);
+EXPORT_SYMBOL_GPL(sata_phy_debounce);
+EXPORT_SYMBOL_GPL(sata_phy_resume);
EXPORT_SYMBOL_GPL(sata_phy_reset);
EXPORT_SYMBOL_GPL(__sata_phy_reset);
EXPORT_SYMBOL_GPL(ata_bus_reset);
EXPORT_SYMBOL_GPL(ata_std_probeinit);
+EXPORT_SYMBOL_GPL(ata_std_prereset);
EXPORT_SYMBOL_GPL(ata_std_softreset);
EXPORT_SYMBOL_GPL(sata_std_hardreset);
EXPORT_SYMBOL_GPL(ata_std_postreset);
EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
+EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
+EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_host_intr);
EXPORT_SYMBOL_GPL(sata_scr_valid);
EXPORT_SYMBOL_GPL(ata_scsi_device_resume);
EXPORT_SYMBOL_GPL(ata_eng_timeout);
+EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
+EXPORT_SYMBOL_GPL(ata_port_abort);
+EXPORT_SYMBOL_GPL(ata_port_freeze);
+EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
+EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
+EXPORT_SYMBOL_GPL(ata_do_eh);
git.openpandora.org / pandora-kernel.git / blobdiff