#include "libata.h"
-static unsigned int ata_dev_init_params(struct ata_port *ap,
- struct ata_device *dev,
- u16 heads,
- u16 sectors);
-static void ata_set_mode(struct ata_port *ap);
-static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
- struct ata_device *dev);
-static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev);
+/* 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 void ata_dev_xfermask(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)");
+int atapi_dmadir = 0;
+module_param(atapi_dmadir, int, 0444);
+MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
+
int libata_fua = 0;
module_param_named(fua, libata_fua, int, 0444);
MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
return "<n/a>";
}
-static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
+static const char *sata_spd_string(unsigned int spd)
+{
+ static const char * const spd_str[] = {
+ "1.5 Gbps",
+ "3.0 Gbps",
+ };
+
+ if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
+ return "<unknown>";
+ return spd_str[spd - 1];
+}
+
+void ata_dev_disable(struct ata_device *dev)
{
- if (ata_dev_present(dev)) {
- printk(KERN_WARNING "ata%u: dev %u disabled\n",
- ap->id, dev->devno);
+ if (ata_dev_enabled(dev)) {
+ ata_dev_printk(dev, KERN_WARNING, "disabled\n");
dev->class++;
}
}
{
struct completion *waiting = qc->private_data;
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
complete(waiting);
}
/**
* ata_exec_internal - execute libata internal command
- * @ap: Port to which the command is sent
* @dev: Device to which the command is sent
* @tf: Taskfile registers for the command and the result
+ * @cdb: CDB for packet command
* @dma_dir: Data tranfer direction of the command
* @buf: Data buffer of the command
* @buflen: Length of data buffer
*
* LOCKING:
* None. Should be called with kernel context, might sleep.
+ *
+ * RETURNS:
+ * Zero on success, AC_ERR_* mask on failure
*/
-
-static unsigned
-ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
- struct ata_taskfile *tf,
- int dma_dir, void *buf, unsigned int buflen)
+unsigned ata_exec_internal(struct ata_device *dev,
+ struct ata_taskfile *tf, const u8 *cdb,
+ int dma_dir, void *buf, unsigned int buflen)
{
+ struct ata_port *ap = dev->ap;
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);
- qc = ata_qc_new_init(ap, dev);
- BUG_ON(qc == NULL);
+ /* 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
+ * drivers choke if any other tag is given. This breaks
+ * ata_tag_internal() test for those drivers. Don't use new
+ * EH stuff without converting to it.
+ */
+ if (ap->ops->error_handler)
+ tag = ATA_TAG_INTERNAL;
+ else
+ tag = 0;
+
+ if (test_and_set_bit(tag, &ap->qc_allocated))
+ BUG();
+ qc = __ata_qc_from_tag(ap, tag);
+
+ qc->tag = tag;
+ qc->scsicmd = NULL;
+ qc->ap = ap;
+ qc->dev = dev;
+ 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;
+ if (cdb)
+ memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
+ qc->flags |= ATA_QCFLAG_RESULT_TF;
qc->dma_dir = dma_dir;
if (dma_dir != DMA_NONE) {
ata_sg_init_one(qc, buf, buflen);
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);
- printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
- ap->id, command);
+ 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);
}
- *tf = qc->tf;
+ /* 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);
+
+ *tf = qc->result_tf;
err_mask = qc->err_mask;
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
*
* Kill the following code as soon as those drivers are fixed.
*/
- if (ap->flags & ATA_FLAG_PORT_DISABLED) {
+ if (ap->flags & ATA_FLAG_DISABLED) {
err_mask |= AC_ERR_SYSTEM;
ata_port_probe(ap);
}
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
return err_mask;
}
/**
* ata_dev_read_id - Read ID data from the specified device
- * @ap: port on which target device resides
* @dev: target device
* @p_class: pointer to class of the target device (may be changed)
* @post_reset: is this read ID post-reset?
- * @p_id: read IDENTIFY page (newly allocated)
+ * @id: buffer to read IDENTIFY data into
*
* Read ID data from the specified device. ATA_CMD_ID_ATA is
* performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
* RETURNS:
* 0 on success, -errno otherwise.
*/
-static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
- unsigned int *p_class, int post_reset, u16 **p_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;
struct ata_taskfile tf;
unsigned int err_mask = 0;
- u16 *id;
const char *reason;
int rc;
ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
- id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
- if (id == NULL) {
- rc = -ENOMEM;
- reason = "out of memory";
- goto err_out;
- }
-
retry:
- ata_tf_init(ap, &tf, dev->devno);
+ ata_tf_init(dev, &tf);
switch (class) {
case ATA_DEV_ATA:
tf.protocol = ATA_PROT_PIO;
- err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
+ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
id, sizeof(id[0]) * ATA_ID_WORDS);
if (err_mask) {
rc = -EIO;
* Some drives were very specific about that exact sequence.
*/
if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
- err_mask = ata_dev_init_params(ap, dev, id[3], id[6]);
+ err_mask = ata_dev_init_params(dev, id[3], id[6]);
if (err_mask) {
rc = -EIO;
reason = "INIT_DEV_PARAMS failed";
}
*p_class = class;
- *p_id = id;
+
return 0;
err_out:
- printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n",
- ap->id, dev->devno, reason);
- kfree(id);
+ ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
+ "(%s, err_mask=0x%x)\n", reason, err_mask);
return rc;
}
-static inline u8 ata_dev_knobble(const struct ata_port *ap,
- struct ata_device *dev)
+static inline u8 ata_dev_knobble(struct ata_device *dev)
+{
+ 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)
{
- return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
+ 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
- * @ap: Port on which target device resides
* @dev: Target device to configure
* @print_info: Enable device info printout
*
* RETURNS:
* 0 on success, -errno otherwise
*/
-static int ata_dev_configure(struct ata_port *ap, 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;
unsigned int xfer_mask;
int i, rc;
- if (!ata_dev_present(dev)) {
+ if (!ata_dev_enabled(dev)) {
DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
ap->id, dev->devno);
return 0;
/* print device capabilities */
if (print_info)
- printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
- "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
- ap->id, dev->devno, id[49], id[82], id[83],
- id[84], id[85], id[86], id[87], id[88]);
+ ata_dev_printk(dev, KERN_DEBUG, "cfg 49:%04x 82:%04x 83:%04x "
+ "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
+ id[49], id[82], id[83], id[84],
+ id[85], id[86], id[87], id[88]);
/* initialize to-be-configured parameters */
- dev->flags = 0;
+ dev->flags &= ~ATA_DFLAG_CFG_MASK;
dev->max_sectors = 0;
dev->cdb_len = 0;
dev->n_sectors = 0;
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)
- printk(KERN_INFO "ata%u: dev %u ATA-%d, "
- "max %s, %Lu sectors: %s\n",
- ap->id, dev->devno,
- ata_id_major_version(id),
- ata_mode_string(xfer_mask),
- (unsigned long long)dev->n_sectors,
- lba_desc);
+ ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
+ "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, ncq_desc);
} else {
/* CHS */
/* print device info to dmesg */
if (print_info)
- printk(KERN_INFO "ata%u: dev %u ATA-%d, "
- "max %s, %Lu sectors: CHS %u/%u/%u\n",
- ap->id, dev->devno,
- ata_id_major_version(id),
- ata_mode_string(xfer_mask),
- (unsigned long long)dev->n_sectors,
- dev->cylinders, dev->heads, dev->sectors);
+ ata_dev_printk(dev, KERN_INFO, "ATA-%d, "
+ "max %s, %Lu sectors: CHS %u/%u/%u\n",
+ ata_id_major_version(id),
+ ata_mode_string(xfer_mask),
+ (unsigned long long)dev->n_sectors,
+ 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)) {
- printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
+ ata_dev_printk(dev, KERN_WARNING,
+ "unsupported CDB len\n");
rc = -EINVAL;
goto err_out_nosup;
}
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)
- printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
- ap->id, dev->devno, 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;
ap->device[i].cdb_len);
/* limit bridge transfers to udma5, 200 sectors */
- if (ata_dev_knobble(ap, dev)) {
+ if (ata_dev_knobble(dev)) {
if (print_info)
- printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
- ap->id, dev->devno);
+ ata_dev_printk(dev, KERN_INFO,
+ "applying bridge limits\n");
dev->udma_mask &= ATA_UDMA5;
dev->max_sectors = ATA_MAX_SECTORS;
}
* PCI/etc. bus probe sem.
*
* RETURNS:
- * Zero on success, non-zero on error.
+ * Zero on success, negative errno otherwise.
*/
static int ata_bus_probe(struct ata_port *ap)
{
unsigned int classes[ATA_MAX_DEVICES];
- unsigned int i, rc, found = 0;
+ int tries[ATA_MAX_DEVICES];
+ int i, rc, down_xfermask;
+ struct ata_device *dev;
ata_port_probe(ap);
- /* reset and determine device classes */
for (i = 0; i < ATA_MAX_DEVICES; i++)
- classes[i] = ATA_DEV_UNKNOWN;
+ tries[i] = ATA_PROBE_MAX_TRIES;
- if (ap->ops->probe_reset) {
- rc = ap->ops->probe_reset(ap, classes);
- if (rc) {
- printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
- return rc;
- }
- } else {
- ap->ops->phy_reset(ap);
+ retry:
+ down_xfermask = 0;
- if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- classes[i] = ap->device[i].class;
+ /* reset and determine device classes */
+ ap->ops->phy_reset(ap);
- ata_port_probe(ap);
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ dev = &ap->device[i];
+
+ if (!(ap->flags & ATA_FLAG_DISABLED) &&
+ dev->class != ATA_DEV_UNKNOWN)
+ classes[dev->devno] = dev->class;
+ else
+ classes[dev->devno] = ATA_DEV_NONE;
+
+ dev->class = ATA_DEV_UNKNOWN;
}
+ ata_port_probe(ap);
+
+ /* 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++)
- if (classes[i] == ATA_DEV_UNKNOWN)
- classes[i] = ATA_DEV_NONE;
+ ap->device[i].pio_mode = XFER_PIO_0;
/* read IDENTIFY page and configure devices */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
+ dev = &ap->device[i];
- dev->class = classes[i];
+ if (tries[i])
+ dev->class = classes[i];
- if (!ata_dev_present(dev))
+ if (!ata_dev_enabled(dev))
continue;
- WARN_ON(dev->id != NULL);
- if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
- dev->class = ATA_DEV_NONE;
- continue;
- }
+ rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
+ if (rc)
+ goto fail;
- if (ata_dev_configure(ap, dev, 1)) {
- ata_dev_disable(ap, dev);
- continue;
- }
+ rc = ata_dev_configure(dev, 1);
+ if (rc)
+ goto fail;
+ }
- found = 1;
+ /* configure transfer mode */
+ rc = ata_set_mode(ap, &dev);
+ if (rc) {
+ down_xfermask = 1;
+ goto fail;
}
- if (!found)
- goto err_out_disable;
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ if (ata_dev_enabled(&ap->device[i]))
+ return 0;
- if (ap->ops->set_mode)
- ap->ops->set_mode(ap);
- else
- ata_set_mode(ap);
+ /* no device present, disable port */
+ ata_port_disable(ap);
+ ap->ops->port_disable(ap);
+ return -ENODEV;
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
- goto err_out_disable;
+ fail:
+ switch (rc) {
+ case -EINVAL:
+ case -ENODEV:
+ tries[dev->devno] = 0;
+ break;
+ case -EIO:
+ sata_down_spd_limit(ap);
+ /* fall through */
+ default:
+ tries[dev->devno]--;
+ if (down_xfermask &&
+ ata_down_xfermask_limit(dev, tries[dev->devno] == 1))
+ tries[dev->devno] = 0;
+ }
- return 0;
+ if (!tries[dev->devno]) {
+ ata_down_xfermask_limit(dev, 1);
+ ata_dev_disable(dev);
+ }
-err_out_disable:
- ap->ops->port_disable(ap);
- return -1;
+ goto retry;
}
/**
void ata_port_probe(struct ata_port *ap)
{
- ap->flags &= ~ATA_FLAG_PORT_DISABLED;
+ ap->flags &= ~ATA_FLAG_DISABLED;
}
/**
*/
static void sata_print_link_status(struct ata_port *ap)
{
- u32 sstatus, tmp;
- const char *speed;
+ u32 sstatus, scontrol, tmp;
- if (!ap->ops->scr_read)
+ if (sata_scr_read(ap, SCR_STATUS, &sstatus))
return;
+ sata_scr_read(ap, SCR_CONTROL, &scontrol);
- sstatus = scr_read(ap, SCR_STATUS);
-
- if (sata_dev_present(ap)) {
+ if (ata_port_online(ap)) {
tmp = (sstatus >> 4) & 0xf;
- if (tmp & (1 << 0))
- speed = "1.5";
- else if (tmp & (1 << 1))
- speed = "3.0";
- else
- speed = "<unknown>";
- printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n",
- ap->id, speed, sstatus);
+ ata_port_printk(ap, KERN_INFO,
+ "SATA link up %s (SStatus %X SControl %X)\n",
+ sata_spd_string(tmp), sstatus, scontrol);
} else {
- printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n",
- ap->id, sstatus);
+ ata_port_printk(ap, KERN_INFO,
+ "SATA link down (SStatus %X SControl %X)\n",
+ sstatus, scontrol);
}
}
if (ap->flags & ATA_FLAG_SATA_RESET) {
/* issue phy wake/reset */
- scr_write_flush(ap, SCR_CONTROL, 0x301);
+ sata_scr_write_flush(ap, SCR_CONTROL, 0x301);
/* Couldn't find anything in SATA I/II specs, but
* AHCI-1.1 10.4.2 says at least 1 ms. */
mdelay(1);
}
- scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
+ /* phy wake/clear reset */
+ sata_scr_write_flush(ap, SCR_CONTROL, 0x300);
/* wait for phy to become ready, if necessary */
do {
msleep(200);
- sstatus = scr_read(ap, SCR_STATUS);
+ sata_scr_read(ap, SCR_STATUS, &sstatus);
if ((sstatus & 0xf) != 1)
break;
} while (time_before(jiffies, timeout));
sata_print_link_status(ap);
/* TODO: phy layer with polling, timeouts, etc. */
- if (sata_dev_present(ap))
+ if (!ata_port_offline(ap))
ata_port_probe(ap);
else
ata_port_disable(ap);
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
+ if (ap->flags & ATA_FLAG_DISABLED)
return;
if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
void sata_phy_reset(struct ata_port *ap)
{
__sata_phy_reset(ap);
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
+ if (ap->flags & ATA_FLAG_DISABLED)
return;
ata_bus_reset(ap);
}
/**
* ata_dev_pair - return other device on cable
- * @ap: port
* @adev: device
*
* Obtain the other device on the same cable, or if none is
* present NULL is returned
*/
-struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
+struct ata_device *ata_dev_pair(struct ata_device *adev)
{
+ struct ata_port *ap = adev->ap;
struct ata_device *pair = &ap->device[1 - adev->devno];
- if (!ata_dev_present(pair))
+ if (!ata_dev_enabled(pair))
return NULL;
return pair;
}
{
ap->device[0].class = ATA_DEV_NONE;
ap->device[1].class = ATA_DEV_NONE;
- ap->flags |= ATA_FLAG_PORT_DISABLED;
+ ap->flags |= ATA_FLAG_DISABLED;
+}
+
+/**
+ * sata_down_spd_limit - adjust SATA spd limit downward
+ * @ap: Port to adjust SATA spd limit for
+ *
+ * Adjust SATA spd limit of @ap downward. Note that this
+ * function only adjusts the limit. The change must be applied
+ * using sata_set_spd().
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 0 on success, negative errno on failure
+ */
+int sata_down_spd_limit(struct ata_port *ap)
+{
+ u32 sstatus, spd, mask;
+ int rc, highbit;
+
+ rc = sata_scr_read(ap, SCR_STATUS, &sstatus);
+ if (rc)
+ return rc;
+
+ mask = ap->sata_spd_limit;
+ if (mask <= 1)
+ return -EINVAL;
+ highbit = fls(mask) - 1;
+ mask &= ~(1 << highbit);
+
+ spd = (sstatus >> 4) & 0xf;
+ if (spd <= 1)
+ return -EINVAL;
+ spd--;
+ mask &= (1 << spd) - 1;
+ if (!mask)
+ return -EINVAL;
+
+ ap->sata_spd_limit = mask;
+
+ ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n",
+ sata_spd_string(fls(mask)));
+
+ return 0;
+}
+
+static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol)
+{
+ u32 spd, limit;
+
+ if (ap->sata_spd_limit == UINT_MAX)
+ limit = 0;
+ else
+ limit = fls(ap->sata_spd_limit);
+
+ spd = (*scontrol >> 4) & 0xf;
+ *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4);
+
+ return spd != limit;
+}
+
+/**
+ * sata_set_spd_needed - is SATA spd configuration needed
+ * @ap: Port in question
+ *
+ * Test whether the spd limit in SControl matches
+ * @ap->sata_spd_limit. This function is used to determine
+ * whether hardreset is necessary to apply SATA spd
+ * configuration.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 1 if SATA spd configuration is needed, 0 otherwise.
+ */
+int sata_set_spd_needed(struct ata_port *ap)
+{
+ u32 scontrol;
+
+ if (sata_scr_read(ap, SCR_CONTROL, &scontrol))
+ return 0;
+
+ return __sata_set_spd_needed(ap, &scontrol);
+}
+
+/**
+ * sata_set_spd - set SATA spd according to spd limit
+ * @ap: Port to set SATA spd for
+ *
+ * Set SATA spd of @ap according to sata_spd_limit.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 0 if spd doesn't need to be changed, 1 if spd has been
+ * changed. Negative errno if SCR registers are inaccessible.
+ */
+int sata_set_spd(struct ata_port *ap)
+{
+ u32 scontrol;
+ int rc;
+
+ if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+ return rc;
+
+ if (!__sata_set_spd_needed(ap, &scontrol))
+ return 0;
+
+ if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
+ return rc;
+
+ return 1;
}
/*
return 0;
}
-static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
+/**
+ * ata_down_xfermask_limit - adjust dev xfer masks downward
+ * @dev: Device to adjust xfer masks
+ * @force_pio0: Force PIO0
+ *
+ * Adjust xfer masks of @dev downward. Note that this function
+ * does not apply the change. Invoking ata_set_mode() afterwards
+ * will apply the limit.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ *
+ * RETURNS:
+ * 0 on success, negative errno on failure
+ */
+int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0)
+{
+ unsigned long xfer_mask;
+ int highbit;
+
+ xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask,
+ dev->udma_mask);
+
+ if (!xfer_mask)
+ goto fail;
+ /* don't gear down to MWDMA from UDMA, go directly to PIO */
+ if (xfer_mask & ATA_MASK_UDMA)
+ xfer_mask &= ~ATA_MASK_MWDMA;
+
+ highbit = fls(xfer_mask) - 1;
+ xfer_mask &= ~(1 << highbit);
+ if (force_pio0)
+ xfer_mask &= 1 << ATA_SHIFT_PIO;
+ if (!xfer_mask)
+ goto fail;
+
+ ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
+ &dev->udma_mask);
+
+ ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n",
+ ata_mode_string(xfer_mask));
+
+ return 0;
+
+ fail:
+ return -EINVAL;
+}
+
+static int ata_dev_set_mode(struct ata_device *dev)
{
unsigned int err_mask;
int rc;
+ dev->flags &= ~ATA_DFLAG_PIO;
if (dev->xfer_shift == ATA_SHIFT_PIO)
dev->flags |= ATA_DFLAG_PIO;
- err_mask = ata_dev_set_xfermode(ap, dev);
+ err_mask = ata_dev_set_xfermode(dev);
if (err_mask) {
- printk(KERN_ERR
- "ata%u: failed to set xfermode (err_mask=0x%x)\n",
- ap->id, err_mask);
+ ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
+ "(err_mask=0x%x)\n", err_mask);
return -EIO;
}
- rc = ata_dev_revalidate(ap, dev, 0);
- if (rc) {
- printk(KERN_ERR
- "ata%u: failed to revalidate after set xfermode\n",
- ap->id);
+ rc = ata_dev_revalidate(dev, 0);
+ if (rc)
return rc;
- }
DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
dev->xfer_shift, (int)dev->xfer_mode);
- printk(KERN_INFO "ata%u: dev %u configured for %s\n",
- ap->id, dev->devno,
- ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
- return 0;
-}
-
-static int ata_host_set_pio(struct ata_port *ap)
-{
- int i;
-
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
-
- if (!ata_dev_present(dev))
- continue;
-
- if (!dev->pio_mode) {
- printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i);
- return -1;
- }
-
- dev->xfer_mode = dev->pio_mode;
- dev->xfer_shift = ATA_SHIFT_PIO;
- if (ap->ops->set_piomode)
- ap->ops->set_piomode(ap, dev);
- }
-
+ ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
+ ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
return 0;
}
-static void ata_host_set_dma(struct ata_port *ap)
-{
- int i;
-
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
-
- if (!ata_dev_present(dev) || !dev->dma_mode)
- continue;
-
- dev->xfer_mode = dev->dma_mode;
- dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
- if (ap->ops->set_dmamode)
- ap->ops->set_dmamode(ap, dev);
- }
-}
-
/**
* ata_set_mode - Program timings and issue SET FEATURES - XFER
* @ap: port on which timings will be programmed
+ * @r_failed_dev: out paramter for failed device
*
- * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
+ * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If
+ * ata_set_mode() fails, pointer to the failing device is
+ * returned in @r_failed_dev.
*
* LOCKING:
* PCI/etc. bus probe sem.
+ *
+ * RETURNS:
+ * 0 on success, negative errno otherwise
*/
-static void ata_set_mode(struct ata_port *ap)
+int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
{
- int i, rc, used_dma = 0;
+ struct ata_device *dev;
+ int i, rc = 0, used_dma = 0, found = 0;
+
+ /* has private set_mode? */
+ if (ap->ops->set_mode) {
+ /* FIXME: make ->set_mode handle no device case and
+ * return error code and failing device on failure.
+ */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ if (ata_dev_enabled(&ap->device[i])) {
+ ap->ops->set_mode(ap);
+ break;
+ }
+ }
+ return 0;
+ }
/* step 1: calculate xfer_mask */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
unsigned int pio_mask, dma_mask;
- if (!ata_dev_present(dev))
- continue;
+ dev = &ap->device[i];
- ata_dev_xfermask(ap, dev);
+ if (!ata_dev_enabled(dev))
+ continue;
- /* TODO: let LLDD filter dev->*_mask here */
+ ata_dev_xfermask(dev);
pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
dev->pio_mode = ata_xfer_mask2mode(pio_mask);
dev->dma_mode = ata_xfer_mask2mode(dma_mask);
+ found = 1;
if (dev->dma_mode)
used_dma = 1;
}
+ if (!found)
+ goto out;
/* step 2: always set host PIO timings */
- rc = ata_host_set_pio(ap);
- if (rc)
- goto err_out;
-
- /* step 3: set host DMA timings */
- ata_host_set_dma(ap);
-
- /* step 4: update devices' xfer mode */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
-
- if (!ata_dev_present(dev))
+ dev = &ap->device[i];
+ if (!ata_dev_enabled(dev))
continue;
- if (ata_dev_set_mode(ap, dev))
- goto err_out;
- }
-
- /*
- * Record simplex status. If we selected DMA then the other
- * host channels are not permitted to do so.
- */
+ if (!dev->pio_mode) {
+ ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
+ rc = -EINVAL;
+ goto out;
+ }
+
+ dev->xfer_mode = dev->pio_mode;
+ dev->xfer_shift = ATA_SHIFT_PIO;
+ if (ap->ops->set_piomode)
+ ap->ops->set_piomode(ap, dev);
+ }
+
+ /* step 3: set host DMA timings */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ dev = &ap->device[i];
+
+ if (!ata_dev_enabled(dev) || !dev->dma_mode)
+ continue;
+ dev->xfer_mode = dev->dma_mode;
+ dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
+ if (ap->ops->set_dmamode)
+ ap->ops->set_dmamode(ap, dev);
+ }
+
+ /* step 4: update devices' xfer mode */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ dev = &ap->device[i];
+
+ if (!ata_dev_enabled(dev))
+ continue;
+
+ rc = ata_dev_set_mode(dev);
+ if (rc)
+ goto out;
+ }
+
+ /* Record simplex status. If we selected DMA then the other
+ * host channels are not permitted to do so.
+ */
if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX))
ap->host_set->simplex_claimed = 1;
- /*
- * Chip specific finalisation
- */
+ /* step5: chip specific finalisation */
if (ap->ops->post_set_mode)
ap->ops->post_set_mode(ap);
- return;
-
-err_out:
- ata_port_disable(ap);
+ out:
+ if (rc)
+ *r_failed_dev = dev;
+ return rc;
}
/**
}
if (status & ATA_BUSY)
- printk(KERN_WARNING "ata%u is slow to respond, "
- "please be patient\n", ap->id);
+ ata_port_printk(ap, KERN_WARNING,
+ "port is slow to respond, please be patient\n");
timeout = timer_start + tmout;
while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) {
}
if (status & ATA_BUSY) {
- printk(KERN_ERR "ata%u failed to respond (%lu secs)\n",
- ap->id, tmout / HZ);
+ ata_port_printk(ap, KERN_ERR, "port failed to respond "
+ "(%lu secs)\n", tmout / HZ);
return 1;
}
* the bus shows 0xFF because the odd clown forgets the D7
* pulldown resistor.
*/
- if (ata_check_status(ap) == 0xFF)
+ if (ata_check_status(ap) == 0xFF) {
+ ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n");
return AC_ERR_OTHER;
+ }
ata_bus_post_reset(ap, devmask);
* Obtains host_set lock.
*
* SIDE EFFECTS:
- * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
+ * Sets ATA_FLAG_DISABLED if bus reset fails.
*/
void ata_bus_reset(struct ata_port *ap)
return;
err_out:
- printk(KERN_ERR "ata%u: disabling port\n", ap->id);
+ ata_port_printk(ap, KERN_ERR, "disabling port\n");
ap->ops->port_disable(ap);
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 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;
- scr_write_flush(ap, SCR_CONTROL, 0x300);
+ if ((rc = sata_scr_read(ap, SCR_STATUS, &cur)))
+ return rc;
+ cur &= 0xf;
- /* Wait for phy to become ready, if necessary. */
- do {
- msleep(200);
- sstatus = scr_read(ap, SCR_STATUS);
- if ((sstatus & 0xf) != 1)
- return 0;
- } while (time_before(jiffies, timeout));
+ last = cur;
+ last_jiffies = jiffies;
- return -1;
+ 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;
+ }
}
/**
- * ata_std_probeinit - initialize probing
- * @ap: port to be probed
+ * sata_phy_resume - resume SATA phy
+ * @ap: ATA port to resume SATA phy for
+ * @params: timing parameters { interval, duratinon, timeout } in msec
*
- * @ap is about to be probed. Initialize it. This function is
- * to be used as standard callback for ata_drive_probe_reset().
+ * Resume SATA phy of @ap and debounce it.
*
- * NOTE!!! Do not use this function as probeinit if a low level
- * driver implements only hardreset. Just pass NULL as probeinit
- * in that case. Using this function is probably okay but doing
- * so makes reset sequence different from the original
- * ->phy_reset implementation and Jeff nervous. :-P
+ * 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)))
+ return rc;
+
+ scontrol = (scontrol & 0x0f0) | 0x300;
+
+ if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
+ return rc;
+
+ /* 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.
*/
-void ata_std_probeinit(struct ata_port *ap)
+int ata_std_prereset(struct ata_port *ap)
{
- if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) {
- sata_phy_resume(ap);
- if (sata_dev_present(ap))
- ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
+ 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;
+ }
}
+
+ /* 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 0;
}
/**
* ata_std_softreset - reset host port via ATA SRST
* @ap: port to reset
- * @verbose: fail verbosely
* @classes: resulting classes of attached devices
*
- * Reset host port using ATA SRST. This function is to be used
- * as standard callback for ata_drive_*_reset() functions.
+ * Reset host port using ATA SRST.
*
* LOCKING:
* Kernel thread context (may sleep)
* RETURNS:
* 0 on success, -errno otherwise.
*/
-int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes)
+int ata_std_softreset(struct ata_port *ap, unsigned int *classes)
{
unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
unsigned int devmask = 0, err_mask;
DPRINTK("ENTER\n");
- if (ap->ops->scr_read && !sata_dev_present(ap)) {
+ if (ata_port_offline(ap)) {
classes[0] = ATA_DEV_NONE;
goto out;
}
DPRINTK("about to softreset, devmask=%x\n", devmask);
err_mask = ata_bus_softreset(ap, devmask);
if (err_mask) {
- if (verbose)
- printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n",
- ap->id, err_mask);
- else
- DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
+ ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n",
err_mask);
return -EIO;
}
/**
* sata_std_hardreset - reset host port via SATA phy reset
* @ap: port to reset
- * @verbose: fail verbosely
* @class: resulting class of attached device
*
* SATA phy-reset host port using DET bits of SControl register.
- * This function is to be used as standard callback for
- * ata_drive_*_reset().
*
* LOCKING:
* Kernel thread context (may sleep)
* RETURNS:
* 0 on success, -errno otherwise.
*/
-int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class)
+int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
{
+ u32 scontrol;
+ int rc;
+
DPRINTK("ENTER\n");
- /* Issue phy wake/reset */
- scr_write_flush(ap, SCR_CONTROL, 0x301);
+ if (sata_set_spd_needed(ap)) {
+ /* SATA spec says nothing about how to reconfigure
+ * spd. To be on the safe side, turn off phy during
+ * reconfiguration. This works for at least ICH7 AHCI
+ * and Sil3124.
+ */
+ if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+ return rc;
- /*
- * Couldn't find anything in SATA I/II specs, but AHCI-1.1
+ scontrol = (scontrol & 0x0f0) | 0x302;
+
+ if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
+ return rc;
+
+ sata_set_spd(ap);
+ }
+
+ /* issue phy wake/reset */
+ if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+ return rc;
+
+ scontrol = (scontrol & 0x0f0) | 0x301;
+
+ if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol)))
+ return rc;
+
+ /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
* 10.4.2 says at least 1 ms.
*/
msleep(1);
- /* Bring phy back */
- sata_phy_resume(ap);
+ /* bring phy back */
+ sata_phy_resume(ap, sata_deb_timing_eh);
/* TODO: phy layer with polling, timeouts, etc. */
- if (!sata_dev_present(ap)) {
+ if (ata_port_offline(ap)) {
*class = ATA_DEV_NONE;
DPRINTK("EXIT, link offline\n");
return 0;
}
if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
- if (verbose)
- printk(KERN_ERR "ata%u: COMRESET failed "
- "(device not ready)\n", ap->id);
- else
- DPRINTK("EXIT, device not ready\n");
+ ata_port_printk(ap, KERN_ERR,
+ "COMRESET failed (device not ready)\n");
return -EIO;
}
* the device might have been reset more than once using
* different reset methods before postreset is invoked.
*
- * This function is to be used as standard callback for
- * ata_drive_*_reset().
- *
* LOCKING:
* Kernel thread context (may sleep)
*/
void ata_std_postreset(struct ata_port *ap, unsigned int *classes)
{
- DPRINTK("ENTER\n");
+ u32 serror;
- /* set cable type if it isn't already set */
- if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA)
- ap->cbl = ATA_CBL_SATA;
+ DPRINTK("ENTER\n");
/* print link status */
- if (ap->cbl == ATA_CBL_SATA)
- sata_print_link_status(ap);
+ sata_print_link_status(ap);
+
+ /* clear SError */
+ if (sata_scr_read(ap, SCR_ERROR, &serror) == 0)
+ 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)
DPRINTK("EXIT\n");
}
-/**
- * ata_std_probe_reset - standard probe reset method
- * @ap: prot to perform probe-reset
- * @classes: resulting classes of attached devices
- *
- * The stock off-the-shelf ->probe_reset method.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
-int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes)
-{
- ata_reset_fn_t hardreset;
-
- hardreset = NULL;
- if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
- hardreset = sata_std_hardreset;
-
- return ata_drive_probe_reset(ap, ata_std_probeinit,
- ata_std_softreset, hardreset,
- ata_std_postreset, classes);
-}
-
-static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset,
- ata_postreset_fn_t postreset,
- unsigned int *classes)
-{
- int i, rc;
-
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- classes[i] = ATA_DEV_UNKNOWN;
-
- rc = reset(ap, 0, classes);
- if (rc)
- return rc;
-
- /* If any class isn't ATA_DEV_UNKNOWN, consider classification
- * is complete and convert all ATA_DEV_UNKNOWN to
- * ATA_DEV_NONE.
- */
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (classes[i] != ATA_DEV_UNKNOWN)
- break;
-
- if (i < ATA_MAX_DEVICES)
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- if (classes[i] == ATA_DEV_UNKNOWN)
- classes[i] = ATA_DEV_NONE;
-
- if (postreset)
- postreset(ap, classes);
-
- return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV;
-}
-
-/**
- * ata_drive_probe_reset - Perform probe reset with given methods
- * @ap: port to reset
- * @probeinit: probeinit method (can be NULL)
- * @softreset: softreset method (can be NULL)
- * @hardreset: hardreset method (can be NULL)
- * @postreset: postreset method (can be NULL)
- * @classes: resulting classes of attached devices
- *
- * Reset the specified port and classify attached devices using
- * given methods. This function prefers softreset but tries all
- * possible reset sequences to reset and classify devices. This
- * function is intended to be used for constructing ->probe_reset
- * callback by low level drivers.
- *
- * Reset methods should follow the following rules.
- *
- * - Return 0 on sucess, -errno on failure.
- * - If classification is supported, fill classes[] with
- * recognized class codes.
- * - If classification is not supported, leave classes[] alone.
- * - If verbose is non-zero, print error message on failure;
- * otherwise, shut up.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- *
- * RETURNS:
- * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
- * if classification fails, and any error code from reset
- * methods.
- */
-int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
- ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
- ata_postreset_fn_t postreset, unsigned int *classes)
-{
- int rc = -EINVAL;
-
- if (probeinit)
- probeinit(ap);
-
- if (softreset) {
- rc = do_probe_reset(ap, softreset, postreset, classes);
- if (rc == 0)
- return 0;
- }
-
- if (!hardreset)
- return rc;
-
- rc = do_probe_reset(ap, hardreset, postreset, classes);
- if (rc == 0 || rc != -ENODEV)
- return rc;
-
- if (softreset)
- rc = do_probe_reset(ap, softreset, postreset, classes);
-
- return rc;
-}
-
/**
* ata_dev_same_device - Determine whether new ID matches configured device
- * @ap: port on which the device to compare against resides
* @dev: device to compare against
* @new_class: class of the new device
* @new_id: IDENTIFY page of the new device
* RETURNS:
* 1 if @dev matches @new_class and @new_id, 0 otherwise.
*/
-static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev,
- unsigned int new_class, const u16 *new_id)
+static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
+ const u16 *new_id)
{
const u16 *old_id = dev->id;
unsigned char model[2][41], serial[2][21];
u64 new_n_sectors;
if (dev->class != new_class) {
- printk(KERN_INFO
- "ata%u: dev %u class mismatch %d != %d\n",
- ap->id, dev->devno, dev->class, new_class);
+ ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
+ dev->class, new_class);
return 0;
}
new_n_sectors = ata_id_n_sectors(new_id);
if (strcmp(model[0], model[1])) {
- printk(KERN_INFO
- "ata%u: dev %u model number mismatch '%s' != '%s'\n",
- ap->id, dev->devno, model[0], model[1]);
+ ata_dev_printk(dev, KERN_INFO, "model number mismatch "
+ "'%s' != '%s'\n", model[0], model[1]);
return 0;
}
if (strcmp(serial[0], serial[1])) {
- printk(KERN_INFO
- "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
- ap->id, dev->devno, serial[0], serial[1]);
+ ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
+ "'%s' != '%s'\n", serial[0], serial[1]);
return 0;
}
if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
- printk(KERN_INFO
- "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
- ap->id, dev->devno, (unsigned long long)dev->n_sectors,
- (unsigned long long)new_n_sectors);
+ ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
+ "%llu != %llu\n",
+ (unsigned long long)dev->n_sectors,
+ (unsigned long long)new_n_sectors);
return 0;
}
/**
* ata_dev_revalidate - Revalidate ATA device
- * @ap: port on which the device to revalidate resides
* @dev: device to revalidate
* @post_reset: is this revalidation after reset?
*
* RETURNS:
* 0 on success, negative errno otherwise
*/
-int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
- int post_reset)
+int ata_dev_revalidate(struct ata_device *dev, int post_reset)
{
- unsigned int class;
- u16 *id;
+ unsigned int class = dev->class;
+ u16 *id = (void *)dev->ap->sector_buf;
int rc;
- if (!ata_dev_present(dev))
- return -ENODEV;
-
- class = dev->class;
- id = NULL;
+ if (!ata_dev_enabled(dev)) {
+ rc = -ENODEV;
+ goto fail;
+ }
- /* allocate & read ID data */
- rc = ata_dev_read_id(ap, dev, &class, post_reset, &id);
+ /* read ID data */
+ rc = ata_dev_read_id(dev, &class, post_reset, id);
if (rc)
goto fail;
/* is the device still there? */
- if (!ata_dev_same_device(ap, dev, class, id)) {
+ if (!ata_dev_same_device(dev, class, id)) {
rc = -ENODEV;
goto fail;
}
- kfree(dev->id);
- dev->id = id;
+ memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
/* configure device according to the new ID */
- return ata_dev_configure(ap, dev, 0);
+ rc = ata_dev_configure(dev, 0);
+ if (rc == 0)
+ return 0;
fail:
- printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n",
- ap->id, dev->devno, rc);
- kfree(id);
+ ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
return rc;
}
/**
* ata_dev_xfermask - Compute supported xfermask of the given device
- * @ap: Port on which the device to compute xfermask for resides
* @dev: Device to compute xfermask for
*
* Compute supported xfermask of @dev and store it in
* LOCKING:
* None.
*/
-static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
+static void ata_dev_xfermask(struct ata_device *dev)
{
+ struct ata_port *ap = dev->ap;
struct ata_host_set *hs = ap->host_set;
unsigned long xfer_mask;
int i;
- xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
- ap->udma_mask);
+ xfer_mask = ata_pack_xfermask(ap->pio_mask,
+ ap->mwdma_mask, ap->udma_mask);
+
+ /* Apply cable rule here. Don't apply it early because when
+ * we handle hot plug the cable type can itself change.
+ */
+ if (ap->cbl == ATA_CBL_PATA40)
+ xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
/* FIXME: Use port-wide xfermask for now */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *d = &ap->device[i];
- if (!ata_dev_present(d))
+
+ if (ata_dev_absent(d))
+ continue;
+
+ if (ata_dev_disabled(d)) {
+ /* to avoid violating device selection timing */
+ xfer_mask &= ata_pack_xfermask(d->pio_mask,
+ UINT_MAX, UINT_MAX);
continue;
- xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
- d->udma_mask);
+ }
+
+ xfer_mask &= ata_pack_xfermask(d->pio_mask,
+ d->mwdma_mask, d->udma_mask);
xfer_mask &= ata_id_xfermask(d->id);
if (ata_dma_blacklisted(d))
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
- /* Apply cable rule here. Don't apply it early because when
- we handle hot plug the cable type can itself change */
- if (ap->cbl == ATA_CBL_PATA40)
- xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
}
if (ata_dma_blacklisted(dev))
- printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
- "disabling DMA\n", ap->id, dev->devno);
+ ata_dev_printk(dev, KERN_WARNING,
+ "device is on DMA blacklist, disabling DMA\n");
if (hs->flags & ATA_HOST_SIMPLEX) {
if (hs->simplex_claimed)
xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
}
+
if (ap->ops->mode_filter)
xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask);
- ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
- &dev->udma_mask);
+ ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
+ &dev->mwdma_mask, &dev->udma_mask);
}
/**
* ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
- * @ap: Port associated with device @dev
* @dev: Device to which command will be sent
*
* Issue SET FEATURES - XFER MODE command to device @dev
* 0 on success, AC_ERR_* mask otherwise.
*/
-static unsigned int ata_dev_set_xfermode(struct ata_port *ap,
- struct ata_device *dev)
+static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
{
struct ata_taskfile tf;
unsigned int err_mask;
/* set up set-features taskfile */
DPRINTK("set features - xfer mode\n");
- ata_tf_init(ap, &tf, dev->devno);
+ ata_tf_init(dev, &tf);
tf.command = ATA_CMD_SET_FEATURES;
tf.feature = SETFEATURES_XFER;
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf.protocol = ATA_PROT_NODATA;
tf.nsect = dev->xfer_mode;
- err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
+ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
DPRINTK("EXIT, err_mask=%x\n", err_mask);
return err_mask;
/**
* ata_dev_init_params - Issue INIT DEV PARAMS command
- * @ap: Port associated with device @dev
* @dev: Device to which command will be sent
* @heads: Number of heads (taskfile parameter)
* @sectors: Number of sectors (taskfile parameter)
* RETURNS:
* 0 on success, AC_ERR_* mask otherwise.
*/
-
-static unsigned int ata_dev_init_params(struct ata_port *ap,
- struct ata_device *dev,
- u16 heads,
- u16 sectors)
+static unsigned int ata_dev_init_params(struct ata_device *dev,
+ u16 heads, u16 sectors)
{
struct ata_taskfile tf;
unsigned int err_mask;
/* set up init dev params taskfile */
DPRINTK("init dev params \n");
- ata_tf_init(ap, &tf, dev->devno);
+ ata_tf_init(dev, &tf);
tf.command = ATA_CMD_INIT_DEV_PARAMS;
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf.protocol = ATA_PROT_NODATA;
tf.nsect = sectors;
tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
- err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
+ err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
DPRINTK("EXIT, err_mask=%x\n", err_mask);
return err_mask;
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;
}
/**
qc->n_elem = 1;
qc->orig_n_elem = 1;
qc->buf_virt = buf;
+ qc->nbytes = buflen;
sg = qc->__sg;
sg_init_one(sg, buf, buflen);
}
/**
- * ata_poll_qc_complete - turn irq back on and finish qc
- * @qc: Command to complete
- * @err_mask: ATA status register content
+ * swap_buf_le16 - swap halves of 16-bit words in place
+ * @buf: Buffer to swap
+ * @buf_words: Number of 16-bit words in buffer.
+ *
+ * Swap halves of 16-bit words if needed to convert from
+ * little-endian byte order to native cpu byte order, or
+ * vice-versa.
*
* LOCKING:
- * None. (grabs host lock)
+ * Inherited from caller.
*/
-
-void ata_poll_qc_complete(struct ata_queued_cmd *qc)
+void swap_buf_le16(u16 *buf, unsigned int buf_words)
{
- struct ata_port *ap = qc->ap;
- unsigned long flags;
+#ifdef __BIG_ENDIAN
+ unsigned int i;
- 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);
+ for (i = 0; i < buf_words; i++)
+ buf[i] = le16_to_cpu(buf[i]);
+#endif /* __BIG_ENDIAN */
}
/**
- * ata_pio_poll - poll using PIO, depending on current state
- * @ap: the target ata_port
+ * ata_mmio_data_xfer - Transfer data by MMIO
+ * @adev: device for this I/O
+ * @buf: data buffer
+ * @buflen: buffer length
+ * @write_data: read/write
*
- * LOCKING:
- * None. (executing in kernel thread context)
+ * Transfer data from/to the device data register by MMIO.
*
- * RETURNS:
- * timeout value to use
+ * LOCKING:
+ * Inherited from caller.
*/
-static unsigned long ata_pio_poll(struct ata_port *ap)
-{
- struct ata_queued_cmd *qc;
- u8 status;
- unsigned int poll_state = HSM_ST_UNKNOWN;
- unsigned int reg_state = HSM_ST_UNKNOWN;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
-
- 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
- * @ap: the target ata_port
- *
- * LOCKING:
- * None. (executing in kernel thread context)
- *
- * RETURNS:
- * Non-zero if qc completed, zero otherwise.
- */
-
-static int ata_pio_complete (struct ata_port *ap)
-{
- struct ata_queued_cmd *qc;
- 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;
- }
- }
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
-
- 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
- * @buf_words: Number of 16-bit words in buffer.
- *
- * Swap halves of 16-bit words if needed to convert from
- * little-endian byte order to native cpu byte order, or
- * vice-versa.
- *
- * LOCKING:
- * Inherited from caller.
- */
-void swap_buf_le16(u16 *buf, unsigned int buf_words)
-{
-#ifdef __BIG_ENDIAN
- unsigned int i;
-
- for (i = 0; i < buf_words; i++)
- buf[i] = le16_to_cpu(buf[i]);
-#endif /* __BIG_ENDIAN */
-}
-
-/**
- * ata_mmio_data_xfer - Transfer data by MMIO
- * @ap: port to read/write
- * @buf: data buffer
- * @buflen: buffer length
- * @write_data: read/write
- *
- * Transfer data from/to the device data register by MMIO.
- *
- * LOCKING:
- * 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");
+/**
+ * ata_pio_sectors - Transfer one or many 512-byte sectors.
+ * @qc: Command on going
+ *
+ * Transfer one or many ATA_SECT_SIZE of data from/to the
+ * ATA device for the DRQ request.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
+static void ata_pio_sectors(struct ata_queued_cmd *qc)
+{
+ if (is_multi_taskfile(&qc->tf)) {
+ /* READ/WRITE MULTIPLE */
+ unsigned int nsect;
- /* do the actual data transfer */
- do_write = (qc->tf.flags & ATA_TFLAG_WRITE);
- ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write);
+ WARN_ON(qc->dev->multi_count == 0);
- kunmap(page);
+ nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count);
+ while (nsect--)
+ ata_pio_sector(qc);
+ } else
+ ata_pio_sector(qc);
+}
+
+/**
+ * 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;
+ }
}
/**
unsigned int i;
if (words) /* warning if bytes > 1 */
- printk(KERN_WARNING "ata%u: %u bytes trailing data\n",
- ap->id, bytes);
+ 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;
err_out:
- printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
- ap->id, dev->devno);
+ ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n");
qc->err_mask |= AC_ERR_HSM;
ap->hsm_task_state = HSM_ST_ERR;
}
/**
- * ata_pio_block - start PIO on a block
+ * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
* @ap: the target ata_port
+ * @qc: qc on going
*
- * LOCKING:
- * None. (executing in kernel thread context)
+ * RETURNS:
+ * 1 if ok in workqueue, 0 otherwise.
*/
-static void ata_pio_block(struct ata_port *ap)
+static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
{
- struct ata_queued_cmd *qc;
- u8 status;
+ if (qc->tf.flags & ATA_TFLAG_POLLING)
+ return 1;
- /*
- * 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->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;
}
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
+ return 0;
+}
- /* check error */
- if (status & (ATA_ERR | ATA_DF)) {
- qc->err_mask |= AC_ERR_DEV;
- ap->hsm_task_state = HSM_ST_ERR;
- return;
- }
+/**
+ * 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:
+ * If @in_wq is zero, spin_lock_irqsave(host_set lock).
+ * Otherwise, none on entry and grabs host lock.
+ */
+static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq)
+{
+ struct ata_port *ap = qc->ap;
+ unsigned long flags;
- /* 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;
- }
+ if (ap->ops->error_handler) {
+ if (in_wq) {
+ spin_lock_irqsave(&ap->host_set->lock, flags);
- atapi_pio_bytes(qc);
- } else {
- /* handle BSY=0, DRQ=0 as error */
- if ((status & ATA_DRQ) == 0) {
- qc->err_mask |= AC_ERR_HSM;
- ap->hsm_task_state = HSM_ST_ERR;
- return;
- }
+ /* 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);
+ }
- ata_pio_sector(qc);
+ 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);
}
ata_altstatus(ap); /* flush */
}
-static void ata_pio_error(struct ata_port *ap)
+/**
+ * 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)
{
- struct ata_queued_cmd *qc;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
+ unsigned long flags = 0;
+ int poll_next;
- if (qc->tf.command != ATA_CMD_PACKET)
- printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
+ WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0);
- /* make sure qc->err_mask is available to
- * know what's wrong and recover
+ /* 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(qc->err_mask == 0);
-
- ap->hsm_task_state = HSM_ST_IDLE;
-
- ata_poll_qc_complete(qc);
-}
-
-static void ata_pio_task(void *_data)
-{
- struct ata_port *ap = _data;
- unsigned long timeout;
- int qc_completed;
+ WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
fsm_start:
- timeout = 0;
- qc_completed = 0;
+ 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_IDLE:
- return;
-
- case HSM_ST:
- ata_pio_block(ap);
- break;
-
- case HSM_ST_LAST:
- qc_completed = ata_pio_complete(ap);
- break;
-
- case HSM_ST_POLL:
- case HSM_ST_LAST_POLL:
- timeout = ata_pio_poll(ap);
- break;
-
- case HSM_ST_TMOUT:
- case HSM_ST_ERR:
- ata_pio_error(ap);
- return;
- }
+ case HSM_ST_FIRST:
+ /* Send first data block or PACKET CDB */
- if (timeout)
- ata_port_queue_task(ap, ata_pio_task, ap, timeout);
- else if (!qc_completed)
- goto fsm_start;
-}
-
-/**
- * atapi_packet_task - Write CDB bytes to hardware
- * @_data: Port to which ATAPI device is attached.
- *
- * 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)
-{
- struct ata_port *ap = _data;
- struct ata_queued_cmd *qc;
- u8 status;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
- WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
+ /* 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;
- /* 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;
- }
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
- /* 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;
- }
+ /* 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;
+ }
- /* send SCSI cdb */
- DPRINTK("send cdb\n");
- WARN_ON(qc->dev->cdb_len < 12);
+ /* 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);
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
- qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
- unsigned long flags;
+ if (qc->tf.protocol == ATA_PROT_PIO) {
+ /* PIO data out protocol.
+ * send first data block.
+ */
- /* 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.
+ /* 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.
*/
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
- ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
- ata_altstatus(ap); /* flush */
+ break;
- 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);
- ata_altstatus(ap); /* flush */
+ 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;
+ }
- /* PIO commands are handled by polling */
- ap->hsm_task_state = HSM_ST;
- ata_port_queue_task(ap, ata_pio_task, ap, 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;
+ goto fsm_start;
+ }
- return;
+ atapi_pio_bytes(qc);
-err_out:
- ata_poll_qc_complete(qc);
-}
+ if (unlikely(ap->hsm_task_state == HSM_ST_ERR))
+ /* bad ireason reported by device */
+ goto fsm_start;
-/**
- * ata_qc_timeout - Handle timeout of queued command
- * @qc: Command that timed out
- *
- * Some part of the kernel (currently, only the SCSI layer)
- * has noticed that the active command on port @ap has not
- * completed after a specified length of time. Handle this
- * condition by disabling DMA (if necessary) and completing
- * transactions, with error if necessary.
- *
- * This also handles the case of the "lost interrupt", where
- * for some reason (possibly hardware bug, possibly driver bug)
- * an interrupt was not delivered to the driver, even though the
- * transaction completed successfully.
- *
- * LOCKING:
- * Inherited from SCSI layer (none, can sleep)
- */
+ } 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;
+ }
-static void ata_qc_timeout(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct ata_host_set *host_set = ap->host_set;
- u8 host_stat = 0, drv_stat;
- unsigned long flags;
+ /* 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;
+ }
- DPRINTK("ENTER\n");
+ ata_pio_sectors(qc);
- ap->hsm_task_state = HSM_ST_IDLE;
+ 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;
+ }
+ }
- spin_lock_irqsave(&host_set->lock, flags);
+ ata_altstatus(ap); /* flush */
+ poll_next = 1;
+ break;
- switch (qc->tf.protocol) {
+ case HSM_ST_LAST:
+ if (unlikely(!ata_ok(status))) {
+ qc->err_mask |= __ac_err_mask(status);
+ ap->hsm_task_state = HSM_ST_ERR;
+ goto fsm_start;
+ }
- case ATA_PROT_DMA:
- case ATA_PROT_ATAPI_DMA:
- host_stat = ap->ops->bmdma_status(ap);
+ /* no more data to transfer */
+ DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
+ ap->id, qc->dev->devno, status);
- /* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(qc);
+ WARN_ON(qc->err_mask);
- /* fall through */
+ ap->hsm_task_state = HSM_ST_IDLE;
- default:
- ata_altstatus(ap);
- drv_stat = ata_chk_status(ap);
+ /* complete taskfile transaction */
+ ata_hsm_qc_complete(qc, in_wq);
- /* ack bmdma irq events */
- ap->ops->irq_clear(ap);
+ poll_next = 0;
+ break;
- printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
- ap->id, qc->tf.command, drv_stat, host_stat);
+ case HSM_ST_ERR:
+ /* 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 */
- qc->err_mask |= ac_err_mask(drv_stat);
+ ata_hsm_qc_complete(qc, in_wq);
+
+ poll_next = 0;
break;
+ default:
+ poll_next = 0;
+ BUG();
}
- spin_unlock_irqrestore(&host_set->lock, flags);
-
- ata_eh_qc_complete(qc);
-
- DPRINTK("EXIT\n");
+ return poll_next;
}
-/**
- * ata_eng_timeout - Handle timeout of queued command
- * @ap: Port on which timed-out command is active
- *
- * Some part of the kernel (currently, only the SCSI layer)
- * has noticed that the active command on port @ap has not
- * completed after a specified length of time. Handle this
- * condition by disabling DMA (if necessary) and completing
- * transactions, with error if necessary.
- *
- * This also handles the case of the "lost interrupt", where
- * for some reason (possibly hardware bug, possibly driver bug)
- * an interrupt was not delivered to the driver, even though the
- * transaction completed successfully.
- *
- * LOCKING:
- * Inherited from SCSI layer (none, can sleep)
- */
-
-void ata_eng_timeout(struct ata_port *ap)
+static void ata_pio_task(void *_data)
{
- DPRINTK("ENTER\n");
+ struct ata_queued_cmd *qc = _data;
+ struct ata_port *ap = qc->ap;
+ u8 status;
+ int poll_next;
- ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
+fsm_start:
+ WARN_ON(ap->hsm_task_state == HSM_ST_IDLE);
- DPRINTK("EXIT\n");
+ /*
+ * 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;
+ }
+ }
+
+ /* move the HSM */
+ poll_next = ata_hsm_move(ap, qc, status, 1);
+
+ /* 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;
- for (i = 0; i < ATA_MAX_QUEUE; i++)
- if (!test_and_set_bit(i, &ap->qactive)) {
- qc = ata_qc_from_tag(ap, 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->qc_allocated)) {
+ qc = __ata_qc_from_tag(ap, i);
break;
}
/**
* ata_qc_new_init - Request an available ATA command, and initialize it
- * @ap: Port associated with device @dev
* @dev: Device from whom we request an available command structure
*
* LOCKING:
* None.
*/
-struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
- struct ata_device *dev)
+struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
{
+ struct ata_port *ap = dev->ap;
struct ata_queued_cmd *qc;
qc = ata_qc_new(ap);
qc->flags = 0;
tag = qc->tag;
if (likely(ata_tag_valid(tag))) {
- if (tag == ap->active_tag)
- ap->active_tag = ATA_TAG_POISON;
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));
if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
ata_sg_clean(qc);
+ /* command should be marked inactive atomically with qc completion */
+ 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, ap, 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, ap, 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, ap, 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, ap, 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;
-
- /* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(qc);
+ u8 status, host_stat = 0;
- /* fall through */
+ VPRINTK("ata%u: protocol %d task_state %d\n",
+ ap->id, qc->tf.protocol, ap->hsm_task_state);
- 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:
#ifdef ATA_IRQ_TRAP
if ((ap->stats.idle_irq % 1000) == 0) {
ata_irq_ack(ap, 0); /* debug trap */
- printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
+ ata_port_printk(ap, KERN_WARNING, "irq trap\n");
return 1;
}
#endif
ap = host_set->ports[i];
if (ap &&
- !(ap->flags & (ATA_FLAG_PORT_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);
}
return IRQ_RETVAL(handled);
}
+/**
+ * sata_scr_valid - test whether SCRs are accessible
+ * @ap: ATA port to test SCR accessibility for
+ *
+ * Test whether SCRs are accessible for @ap.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * 1 if SCRs are accessible, 0 otherwise.
+ */
+int sata_scr_valid(struct ata_port *ap)
+{
+ return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read;
+}
+
+/**
+ * sata_scr_read - read SCR register of the specified port
+ * @ap: ATA port to read SCR for
+ * @reg: SCR to read
+ * @val: Place to store read value
+ *
+ * Read SCR register @reg of @ap into *@val. This function is
+ * guaranteed to succeed if the cable type of the port is SATA
+ * and the port implements ->scr_read.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * 0 on success, negative errno on failure.
+ */
+int sata_scr_read(struct ata_port *ap, int reg, u32 *val)
+{
+ if (sata_scr_valid(ap)) {
+ *val = ap->ops->scr_read(ap, reg);
+ return 0;
+ }
+ return -EOPNOTSUPP;
+}
+
+/**
+ * sata_scr_write - write SCR register of the specified port
+ * @ap: ATA port to write SCR for
+ * @reg: SCR to write
+ * @val: value to write
+ *
+ * Write @val to SCR register @reg of @ap. This function is
+ * guaranteed to succeed if the cable type of the port is SATA
+ * and the port implements ->scr_read.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * 0 on success, negative errno on failure.
+ */
+int sata_scr_write(struct ata_port *ap, int reg, u32 val)
+{
+ if (sata_scr_valid(ap)) {
+ ap->ops->scr_write(ap, reg, val);
+ return 0;
+ }
+ return -EOPNOTSUPP;
+}
+
+/**
+ * sata_scr_write_flush - write SCR register of the specified port and flush
+ * @ap: ATA port to write SCR for
+ * @reg: SCR to write
+ * @val: value to write
+ *
+ * This function is identical to sata_scr_write() except that this
+ * function performs flush after writing to the register.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * 0 on success, negative errno on failure.
+ */
+int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val)
+{
+ if (sata_scr_valid(ap)) {
+ ap->ops->scr_write(ap, reg, val);
+ ap->ops->scr_read(ap, reg);
+ return 0;
+ }
+ return -EOPNOTSUPP;
+}
+
+/**
+ * ata_port_online - test whether the given port is online
+ * @ap: ATA port to test
+ *
+ * Test whether @ap is online. Note that this function returns 0
+ * if online status of @ap cannot be obtained, so
+ * ata_port_online(ap) != !ata_port_offline(ap).
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * 1 if the port online status is available and online.
+ */
+int ata_port_online(struct ata_port *ap)
+{
+ u32 sstatus;
+
+ if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3)
+ return 1;
+ return 0;
+}
+
+/**
+ * ata_port_offline - test whether the given port is offline
+ * @ap: ATA port to test
+ *
+ * Test whether @ap is offline. Note that this function returns
+ * 0 if offline status of @ap cannot be obtained, so
+ * ata_port_online(ap) != !ata_port_offline(ap).
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * 1 if the port offline status is available and offline.
+ */
+int ata_port_offline(struct ata_port *ap)
+{
+ u32 sstatus;
+
+ if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3)
+ return 1;
+ return 0;
+}
/*
* Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
* without filling any other registers
*/
-static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev,
- u8 cmd)
+static int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
{
struct ata_taskfile tf;
int err;
- ata_tf_init(ap, &tf, dev->devno);
+ ata_tf_init(dev, &tf);
tf.command = cmd;
tf.flags |= ATA_TFLAG_DEVICE;
tf.protocol = ATA_PROT_NODATA;
- err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0);
+ err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0);
if (err)
- printk(KERN_ERR "%s: ata command failed: %d\n",
- __FUNCTION__, err);
+ ata_dev_printk(dev, KERN_ERR, "%s: ata command failed: %d\n",
+ __FUNCTION__, err);
return err;
}
-static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev)
+static int ata_flush_cache(struct ata_device *dev)
{
u8 cmd;
else
cmd = ATA_CMD_FLUSH;
- return ata_do_simple_cmd(ap, dev, cmd);
+ return ata_do_simple_cmd(dev, cmd);
}
-static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev)
+static int ata_standby_drive(struct ata_device *dev)
{
- return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1);
+ return ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1);
}
-static int ata_start_drive(struct ata_port *ap, struct ata_device *dev)
+static int ata_start_drive(struct ata_device *dev)
{
- return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE);
+ return ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE);
}
/**
* ata_device_resume - wakeup a previously suspended devices
- * @ap: port the device is connected to
* @dev: the device to resume
*
* Kick the drive back into action, by sending it an idle immediate
* and host.
*
*/
-int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
+int ata_device_resume(struct ata_device *dev)
{
+ struct ata_port *ap = dev->ap;
+
if (ap->flags & ATA_FLAG_SUSPENDED) {
+ struct ata_device *failed_dev;
+
+ ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 200000);
+
ap->flags &= ~ATA_FLAG_SUSPENDED;
- ata_set_mode(ap);
+ while (ata_set_mode(ap, &failed_dev))
+ ata_dev_disable(failed_dev);
}
- if (!ata_dev_present(dev))
+ if (!ata_dev_enabled(dev))
return 0;
if (dev->class == ATA_DEV_ATA)
- ata_start_drive(ap, dev);
+ ata_start_drive(dev);
return 0;
}
/**
* ata_device_suspend - prepare a device for suspend
- * @ap: port the device is connected to
* @dev: the device to suspend
* @state: target power management state
*
* Flush the cache on the drive, if appropriate, then issue a
* standbynow command.
*/
-int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
+int ata_device_suspend(struct ata_device *dev, pm_message_t state)
{
- if (!ata_dev_present(dev))
+ struct ata_port *ap = dev->ap;
+
+ if (!ata_dev_enabled(dev))
return 0;
if (dev->class == ATA_DEV_ATA)
- ata_flush_cache(ap, dev);
+ ata_flush_cache(dev);
if (state.event != PM_EVENT_FREEZE)
- ata_standby_drive(ap, dev);
+ ata_standby_drive(dev);
ap->flags |= ATA_FLAG_SUSPENDED;
return 0;
}
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)
host->unique_id = ata_unique_id++;
host->max_cmd_len = 12;
- ap->flags = ATA_FLAG_PORT_DISABLED;
+ ap->flags = ATA_FLAG_DISABLED;
ap->id = host->unique_id;
ap->host = host;
ap->ctl = ATA_DEVCTL_OBS;
ap->udma_mask = ent->udma_mask;
ap->flags |= ent->host_flags;
ap->ops = ent->port_ops;
- ap->cbl = ATA_CBL_NONE;
+ ap->hw_sata_spd_limit = UINT_MAX;
ap->active_tag = ATA_TAG_POISON;
ap->last_ctl = 0xFF;
+#if defined(ATA_VERBOSE_DEBUG)
+ /* turn on all debugging levels */
+ ap->msg_enable = 0x00FF;
+#elif defined(ATA_DEBUG)
+ ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
+#else
+ ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR;
+#endif
+
INIT_WORK(&ap->port_task, NULL, NULL);
+ INIT_WORK(&ap->hotplug_task, ata_scsi_hotplug, ap);
+ INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan, ap);
INIT_LIST_HEAD(&ap->eh_done_q);
+ init_waitqueue_head(&ap->eh_wait_q);
+
+ /* set cable type */
+ ap->cbl = ATA_CBL_NONE;
+ if (ap->flags & ATA_FLAG_SATA)
+ ap->cbl = ATA_CBL_SATA;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
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->error_handler &&
!(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) {
printk(KERN_ERR "ata%u: no reset mechanism available\n",
port_no);
host->transportt = &ata_scsi_transport_template;
- ap = (struct ata_port *) &host->hostdata[0];
+ ap = ata_shost_to_port(host);
ata_host_init(ap, host, host_set, ent, 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;
struct device *dev = ent->dev;
struct ata_host_set *host_set;
+ int rc;
DPRINTK("ENTER\n");
/* alloc a container for our list of ATA ports (buses) */
(ap->pio_mask << ATA_SHIFT_PIO);
/* print per-port info to dmesg */
- printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
- "bmdma 0x%lX irq %lu\n",
- ap->id,
- ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
- ata_mode_string(xfer_mode_mask),
- ap->ioaddr.cmd_addr,
- ap->ioaddr.ctl_addr,
- ap->ioaddr.bmdma_addr,
- ent->irq);
+ ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX "
+ "ctl 0x%lX bmdma 0x%lX irq %lu\n",
+ ap->flags & ATA_FLAG_SATA ? 'S' : 'P',
+ ata_mode_string(xfer_mode_mask),
+ ap->ioaddr.cmd_addr,
+ ap->ioaddr.ctl_addr,
+ ap->ioaddr.bmdma_addr,
+ ent->irq);
ata_chk_status(ap);
host_set->ops->irq_clear(ap);
+ ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */
count++;
}
goto err_free_ret;
/* obtain irq, that is shared between channels */
- if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
- DRV_NAME, host_set))
+ rc = request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags,
+ DRV_NAME, host_set);
+ if (rc) {
+ dev_printk(KERN_ERR, dev, "irq %lu request failed: %d\n",
+ ent->irq, rc);
goto err_out;
+ }
/* perform each probe synchronously */
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) {
- printk(KERN_ERR "ata%u: scsi_add_host failed\n",
- ap->id);
+ ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n");
/* FIXME: do something useful here */
/* FIXME: handle unconditional calls to
* scsi_scan_host and ata_host_remove, below,
* at the very least
*/
}
+
+ if (ap->ops->error_handler) {
+ 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);
int ata_scsi_release(struct Scsi_Host *host)
{
- struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
- int i;
+ struct ata_port *ap = ata_shost_to_port(host);
DPRINTK("ENTER\n");
ap->ops->port_disable(ap);
ata_host_remove(ap, 0);
- for (i = 0; i < ATA_MAX_DEVICES; i++)
- kfree(ap->device[i].id);
DPRINTK("EXIT\n");
return 1;
{
struct device *dev = pci_dev_to_dev(pdev);
struct ata_host_set *host_set = dev_get_drvdata(dev);
+ struct ata_host_set *host_set2 = host_set->next;
ata_host_set_remove(host_set);
+ if (host_set2)
+ ata_host_set_remove(host_set2);
+
pci_release_regions(pdev);
pci_disable_device(pdev);
dev_set_drvdata(dev, NULL);
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);
return rc;
}
+/**
+ * ata_wait_register - wait until register value changes
+ * @reg: IO-mapped register
+ * @mask: Mask to apply to read register value
+ * @val: Wait condition
+ * @interval_msec: polling interval in milliseconds
+ * @timeout_msec: timeout in milliseconds
+ *
+ * Waiting for some bits of register to change is a common
+ * operation for ATA controllers. This function reads 32bit LE
+ * IO-mapped register @reg and tests for the following condition.
+ *
+ * (*@reg & mask) != val
+ *
+ * If the condition is met, it returns; otherwise, the process is
+ * repeated after @interval_msec until timeout.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * The final register value.
+ */
+u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
+ unsigned long interval_msec,
+ unsigned long timeout_msec)
+{
+ unsigned long timeout;
+ u32 tmp;
+
+ tmp = ioread32(reg);
+
+ /* Calculate timeout _after_ the first read to make sure
+ * preceding writes reach the controller before starting to
+ * eat away the timeout.
+ */
+ timeout = jiffies + (timeout_msec * HZ) / 1000;
+
+ while ((tmp & mask) == val && time_before(jiffies, timeout)) {
+ msleep(interval_msec);
+ tmp = ioread32(reg);
+ }
+
+ return tmp;
+}
+
/*
* libata is essentially a library of internal helper functions for
* low-level ATA host controller drivers. As such, the API/ABI is
* 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_eng_timeout);
EXPORT_SYMBOL_GPL(ata_tf_load);
EXPORT_SYMBOL_GPL(ata_tf_read);
EXPORT_SYMBOL_GPL(ata_noop_dev_select);
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_std_probe_reset);
-EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
EXPORT_SYMBOL_GPL(ata_dev_revalidate);
EXPORT_SYMBOL_GPL(ata_dev_classify);
EXPORT_SYMBOL_GPL(ata_dev_pair);
EXPORT_SYMBOL_GPL(ata_port_disable);
EXPORT_SYMBOL_GPL(ata_ratelimit);
+EXPORT_SYMBOL_GPL(ata_wait_register);
EXPORT_SYMBOL_GPL(ata_busy_sleep);
EXPORT_SYMBOL_GPL(ata_port_queue_task);
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(sata_scr_read);
+EXPORT_SYMBOL_GPL(sata_scr_write);
+EXPORT_SYMBOL_GPL(sata_scr_write_flush);
+EXPORT_SYMBOL_GPL(ata_port_online);
+EXPORT_SYMBOL_GPL(ata_port_offline);
EXPORT_SYMBOL_GPL(ata_id_string);
EXPORT_SYMBOL_GPL(ata_id_c_string);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
-EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
-EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
EXPORT_SYMBOL_GPL(ata_timing_compute);
EXPORT_SYMBOL_GPL(ata_device_resume);
EXPORT_SYMBOL_GPL(ata_scsi_device_suspend);
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);
#include <linux/spinlock.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
+ #include <scsi/scsi_cmnd.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_device.h>
- #include <scsi/scsi_request.h>
+#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport.h>
#include <linux/libata.h>
#include <linux/hdreg.h>
#define SECTOR_SIZE 512
typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
-static struct ata_device *
-ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
-static void ata_scsi_error(struct Scsi_Host *host);
-enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
+
+static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
+ const struct scsi_device *scsidev);
+static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
+ const struct scsi_device *scsidev);
+static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
+ unsigned int id, unsigned int lun);
+
#define RW_RECOVERY_MPAGE 0x1
#define RW_RECOVERY_MPAGE_LEN 12
struct scsi_transport_template ata_scsi_transport_template = {
.eh_strategy_handler = ata_scsi_error,
.eh_timed_out = ata_scsi_timed_out,
+ .user_scan = ata_scsi_user_scan,
};
/**
* ata_scsi_qc_new - acquire new ata_queued_cmd reference
- * @ap: ATA port to which the new command is attached
* @dev: ATA device to which the new command is attached
* @cmd: SCSI command that originated this ATA command
* @done: SCSI command completion function
* RETURNS:
* Command allocated, or %NULL if none available.
*/
-struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
- struct ata_device *dev,
+struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
struct ata_queued_cmd *qc;
- qc = ata_qc_new_init(ap, dev);
+ qc = ata_qc_new_init(dev);
if (qc) {
qc->scsicmd = cmd;
qc->scsidone = done;
int ata_scsi_device_resume(struct scsi_device *sdev)
{
- struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
- struct ata_device *dev = &ap->device[sdev->id];
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
- return ata_device_resume(ap, dev);
+ return ata_device_resume(dev);
}
int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
{
- struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
- struct ata_device *dev = &ap->device[sdev->id];
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
- return ata_device_suspend(ap, dev, state);
+ return ata_device_suspend(dev, state);
}
/**
* @sk: the sense key we'll fill out
* @asc: the additional sense code we'll fill out
* @ascq: the additional sense code qualifier we'll fill out
+ * @verbose: be verbose
*
* Converts an ATA error into a SCSI error. Fill out pointers to
* SK, ASC, and ASCQ bytes for later use in fixed or descriptor
* spin_lock_irqsave(host_set lock)
*/
void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
- u8 *ascq)
+ u8 *ascq, int verbose)
{
int i;
}
}
/* No immediate match */
- printk(KERN_WARNING "ata%u: no sense translation for "
- "error 0x%02x\n", id, drv_err);
+ if (verbose)
+ printk(KERN_WARNING "ata%u: no sense translation for "
+ "error 0x%02x\n", id, drv_err);
}
/* Fall back to interpreting status bits */
}
}
/* No error? Undecoded? */
- printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
- id, drv_stat);
+ if (verbose)
+ printk(KERN_WARNING "ata%u: no sense translation for "
+ "status: 0x%02x\n", id, drv_stat);
/* We need a sensible error return here, which is tricky, and one
that won't cause people to do things like return a disk wrongly */
*ascq = 0x00;
translate_done:
- printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
- "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
- *sk, *asc, *ascq);
+ if (verbose)
+ printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
+ "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
+ id, drv_stat, drv_err, *sk, *asc, *ascq);
return;
}
void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->tf;
+ struct ata_taskfile *tf = &qc->result_tf;
unsigned char *sb = cmd->sense_buffer;
unsigned char *desc = sb + 8;
+ int verbose = qc->ap->ops->error_handler == NULL;
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
- /*
- * Read the controller registers.
- */
- WARN_ON(qc->ap->ops->tf_read == NULL);
- qc->ap->ops->tf_read(qc->ap, tf);
-
/*
* Use ata_to_sense_error() to map status register bits
* onto sense key, asc & ascq.
*/
- if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
+ if (qc->err_mask ||
+ tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
- &sb[1], &sb[2], &sb[3]);
+ &sb[1], &sb[2], &sb[3], verbose);
sb[1] &= 0x0f;
}
void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->tf;
+ struct ata_taskfile *tf = &qc->result_tf;
unsigned char *sb = cmd->sense_buffer;
+ int verbose = qc->ap->ops->error_handler == NULL;
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
- /*
- * Read the controller registers.
- */
- WARN_ON(qc->ap->ops->tf_read == NULL);
- qc->ap->ops->tf_read(qc->ap, tf);
-
/*
* Use ata_to_sense_error() to map status register bits
* onto sense key, asc & ascq.
*/
- if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
+ if (qc->err_mask ||
+ tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
- &sb[2], &sb[12], &sb[13]);
+ &sb[2], &sb[12], &sb[13], verbose);
sb[2] &= 0x0f;
}
*/
max_sectors = ATA_MAX_SECTORS;
if (dev->flags & ATA_DFLAG_LBA48)
- max_sectors = 2048;
+ max_sectors = ATA_MAX_SECTORS_LBA48;
if (dev->max_sectors)
max_sectors = dev->max_sectors;
request_queue_t *q = sdev->request_queue;
blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
}
+
+ if (dev->flags & ATA_DFLAG_NCQ) {
+ int depth;
+
+ depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
+ depth = min(ATA_MAX_QUEUE - 1, depth);
+ scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
+ }
}
/**
int ata_scsi_slave_config(struct scsi_device *sdev)
{
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
+
ata_scsi_sdev_config(sdev);
blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
- if (sdev->id < ATA_MAX_DEVICES) {
- struct ata_port *ap;
- struct ata_device *dev;
-
- ap = (struct ata_port *) &sdev->host->hostdata[0];
- dev = &ap->device[sdev->id];
-
+ if (dev)
ata_scsi_dev_config(sdev, dev);
- }
return 0; /* scsi layer doesn't check return value, sigh */
}
/**
- * ata_scsi_timed_out - SCSI layer time out callback
- * @cmd: timed out SCSI command
+ * ata_scsi_slave_destroy - SCSI device is about to be destroyed
+ * @sdev: SCSI device to be destroyed
*
- * Handles SCSI layer timeout. We race with normal completion of
- * the qc for @cmd. If the qc is already gone, we lose and let
- * the scsi command finish (EH_HANDLED). Otherwise, the qc has
- * timed out and EH should be invoked. Prevent ata_qc_complete()
- * from finishing it by setting EH_SCHEDULED and return
- * EH_NOT_HANDLED.
+ * @sdev is about to be destroyed for hot/warm unplugging. If
+ * this unplugging was initiated by libata as indicated by NULL
+ * dev->sdev, this function doesn't have to do anything.
+ * Otherwise, SCSI layer initiated warm-unplug is in progress.
+ * Clear dev->sdev, schedule the device for ATA detach and invoke
+ * EH.
*
* LOCKING:
- * Called from timer context
- *
- * RETURNS:
- * EH_HANDLED or EH_NOT_HANDLED
+ * Defined by SCSI layer. We don't really care.
*/
-enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
+void ata_scsi_slave_destroy(struct scsi_device *sdev)
{
- struct Scsi_Host *host = cmd->device->host;
- struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
unsigned long flags;
- struct ata_queued_cmd *qc;
- enum scsi_eh_timer_return ret = EH_HANDLED;
+ struct ata_device *dev;
- DPRINTK("ENTER\n");
+ if (!ap->ops->error_handler)
+ return;
spin_lock_irqsave(&ap->host_set->lock, flags);
- qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc) {
- WARN_ON(qc->scsicmd != cmd);
- qc->flags |= ATA_QCFLAG_EH_SCHEDULED;
- qc->err_mask |= AC_ERR_TIMEOUT;
- ret = EH_NOT_HANDLED;
+ dev = __ata_scsi_find_dev(ap, sdev);
+ if (dev && dev->sdev) {
+ /* SCSI device already in CANCEL state, no need to offline it */
+ dev->sdev = NULL;
+ dev->flags |= ATA_DFLAG_DETACH;
+ ata_port_schedule_eh(ap);
}
spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
- DPRINTK("EXIT, ret=%d\n", ret);
- return ret;
}
/**
- * ata_scsi_error - SCSI layer error handler callback
- * @host: SCSI host on which error occurred
+ * ata_scsi_change_queue_depth - SCSI callback for queue depth config
+ * @sdev: SCSI device to configure queue depth for
+ * @queue_depth: new queue depth
*
- * Handles SCSI-layer-thrown error events.
+ * This is libata standard hostt->change_queue_depth callback.
+ * SCSI will call into this callback when user tries to set queue
+ * depth via sysfs.
*
* LOCKING:
- * Inherited from SCSI layer (none, can sleep)
+ * SCSI layer (we don't care)
+ *
+ * RETURNS:
+ * Newly configured queue depth.
*/
-
-static void ata_scsi_error(struct Scsi_Host *host)
+int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
{
- struct ata_port *ap;
- unsigned long flags;
-
- DPRINTK("ENTER\n");
-
- ap = (struct ata_port *) &host->hostdata[0];
-
- spin_lock_irqsave(&ap->host_set->lock, flags);
- WARN_ON(ap->flags & ATA_FLAG_IN_EH);
- ap->flags |= ATA_FLAG_IN_EH;
- WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
- ata_port_flush_task(ap);
-
- ap->ops->eng_timeout(ap);
-
- WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q));
-
- scsi_eh_flush_done_q(&ap->eh_done_q);
-
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_IN_EH;
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
-
- DPRINTK("EXIT\n");
-}
-
-static void ata_eh_scsidone(struct scsi_cmnd *scmd)
-{
- /* nada */
-}
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *dev;
+ int max_depth;
-static void __ata_eh_qc_complete(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct scsi_cmnd *scmd = qc->scsicmd;
- unsigned long flags;
+ if (queue_depth < 1)
+ return sdev->queue_depth;
- spin_lock_irqsave(&ap->host_set->lock, flags);
- qc->scsidone = ata_eh_scsidone;
- __ata_qc_complete(qc);
- WARN_ON(ata_tag_valid(qc->tag));
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ dev = ata_scsi_find_dev(ap, sdev);
+ if (!dev || !ata_dev_enabled(dev))
+ return sdev->queue_depth;
- scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
-}
+ max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
+ max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
+ if (queue_depth > max_depth)
+ queue_depth = max_depth;
-/**
- * ata_eh_qc_complete - Complete an active ATA command from EH
- * @qc: Command to complete
- *
- * Indicate to the mid and upper layers that an ATA command has
- * completed. To be used from EH.
- */
-void ata_eh_qc_complete(struct ata_queued_cmd *qc)
-{
- struct scsi_cmnd *scmd = qc->scsicmd;
- scmd->retries = scmd->allowed;
- __ata_eh_qc_complete(qc);
-}
-
-/**
- * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
- * @qc: Command to retry
- *
- * Indicate to the mid and upper layers that an ATA command
- * should be retried. To be used from EH.
- *
- * SCSI midlayer limits the number of retries to scmd->allowed.
- * This function might need to adjust scmd->retries for commands
- * which get retried due to unrelated NCQ failures.
- */
-void ata_eh_qc_retry(struct ata_queued_cmd *qc)
-{
- __ata_eh_qc_complete(qc);
+ scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
+ return queue_depth;
}
/**
tf->nsect = 1; /* 1 sector, lba=0 */
if (qc->dev->flags & ATA_DFLAG_LBA) {
- qc->tf.flags |= ATA_TFLAG_LBA;
+ tf->flags |= ATA_TFLAG_LBA;
tf->lbah = 0x0;
tf->lbam = 0x0;
u64 block;
u32 n_block;
+ qc->flags |= ATA_QCFLAG_IO;
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
*/
goto nothing_to_do;
- if (dev->flags & ATA_DFLAG_LBA) {
+ if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
+ /* yay, NCQ */
+ if (!lba_48_ok(block, n_block))
+ goto out_of_range;
+
+ tf->protocol = ATA_PROT_NCQ;
+ tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
+
+ if (tf->flags & ATA_TFLAG_WRITE)
+ tf->command = ATA_CMD_FPDMA_WRITE;
+ else
+ tf->command = ATA_CMD_FPDMA_READ;
+
+ qc->nsect = n_block;
+
+ tf->nsect = qc->tag << 3;
+ tf->hob_feature = (n_block >> 8) & 0xff;
+ tf->feature = n_block & 0xff;
+
+ tf->hob_lbah = (block >> 40) & 0xff;
+ tf->hob_lbam = (block >> 32) & 0xff;
+ tf->hob_lbal = (block >> 24) & 0xff;
+ tf->lbah = (block >> 16) & 0xff;
+ tf->lbam = (block >> 8) & 0xff;
+ tf->lbal = block & 0xff;
+
+ tf->device = 1 << 6;
+ if (tf->flags & ATA_TFLAG_FUA)
+ tf->device |= 1 << 7;
+ } else if (dev->flags & ATA_DFLAG_LBA) {
tf->flags |= ATA_TFLAG_LBA;
if (lba_28_ok(block, n_block)) {
u8 *cdb = cmd->cmnd;
int need_sense = (qc->err_mask != 0);
+ /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
+ * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
+ * cache
+ */
+ if (!need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
+ ((qc->tf.feature == SETFEATURES_WC_ON) ||
+ (qc->tf.feature == SETFEATURES_WC_OFF))) {
+ qc->ap->eh_info.action |= ATA_EH_REVALIDATE;
+ ata_port_schedule_eh(qc->ap);
+ }
+
/* For ATA pass thru (SAT) commands, generate a sense block if
* user mandated it or if there's an error. Note that if we
* generate because the user forced us to, a check condition
}
}
- if (need_sense) {
- /* The ata_gen_..._sense routines fill in tf */
- ata_dump_status(qc->ap->id, &qc->tf);
- }
+ if (need_sense && !qc->ap->ops->error_handler)
+ ata_dump_status(qc->ap->id, &qc->result_tf);
qc->scsidone(cmd);
ata_qc_free(qc);
}
+/**
+ * ata_scmd_need_defer - Check whether we need to defer scmd
+ * @dev: ATA device to which the command is addressed
+ * @is_io: Is the command IO (and thus possibly NCQ)?
+ *
+ * NCQ and non-NCQ commands cannot run together. As upper layer
+ * only knows the queue depth, we are responsible for maintaining
+ * exclusion. This function checks whether a new command can be
+ * issued to @dev.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * 1 if deferring is needed, 0 otherwise.
+ */
+static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
+{
+ struct ata_port *ap = dev->ap;
+
+ if (!(dev->flags & ATA_DFLAG_NCQ))
+ return 0;
+
+ if (is_io) {
+ if (!ata_tag_valid(ap->active_tag))
+ return 0;
+ } else {
+ if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
+ return 0;
+ }
+ return 1;
+}
+
/**
* ata_scsi_translate - Translate then issue SCSI command to ATA device
- * @ap: ATA port to which the command is addressed
* @dev: ATA device to which the command is addressed
* @cmd: SCSI command to execute
* @done: SCSI command completion function
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
+ * needs to be deferred.
*/
-
-static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
- struct scsi_cmnd *cmd,
+static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *),
ata_xlat_func_t xlat_func)
{
struct ata_queued_cmd *qc;
u8 *scsicmd = cmd->cmnd;
+ int is_io = xlat_func == ata_scsi_rw_xlat;
VPRINTK("ENTER\n");
- qc = ata_scsi_qc_new(ap, dev, cmd, done);
+ if (unlikely(ata_scmd_need_defer(dev, is_io)))
+ goto defer;
+
+ qc = ata_scsi_qc_new(dev, cmd, done);
if (!qc)
goto err_mem;
if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
cmd->sc_data_direction == DMA_TO_DEVICE) {
if (unlikely(cmd->request_bufflen < 1)) {
- printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
- ap->id, dev->devno);
+ ata_dev_printk(dev, KERN_WARNING,
+ "WARNING: zero len r/w req\n");
goto err_did;
}
ata_qc_issue(qc);
VPRINTK("EXIT\n");
- return;
+ return 0;
early_finish:
ata_qc_free(qc);
done(cmd);
DPRINTK("EXIT - early finish (good or error)\n");
- return;
+ return 0;
err_did:
ata_qc_free(qc);
cmd->result = (DID_ERROR << 16);
done(cmd);
DPRINTK("EXIT - internal\n");
- return;
+ return 0;
+
+defer:
+ DPRINTK("EXIT - defer\n");
+ return SCSI_MLQUEUE_DEVICE_BUSY;
}
/**
return 0;
dpofua = 0;
- if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
+ if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
(!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
dpofua = 1 << 4;
static void atapi_sense_complete(struct ata_queued_cmd *qc)
{
- if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0))
+ if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
/* FIXME: not quite right; we don't want the
* translation of taskfile registers into
* a sense descriptors, since that's only
* correct for ATA, not ATAPI
*/
ata_gen_ata_desc_sense(qc);
+ }
qc->scsidone(qc->scsicmd);
ata_qc_free(qc);
VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
+ /* handle completion from new EH */
+ if (unlikely(qc->ap->ops->error_handler &&
+ (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
+
+ if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
+ /* FIXME: not quite right; we don't want the
+ * translation of taskfile registers into a
+ * sense descriptors, since that's only
+ * correct for ATA, not ATAPI
+ */
+ ata_gen_ata_desc_sense(qc);
+ }
+
+ qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
+ qc->scsidone(cmd);
+ ata_qc_free(qc);
+ return;
+ }
+
+ /* successful completion or old EH failure path */
if (unlikely(err_mask & AC_ERR_DEV)) {
cmd->result = SAM_STAT_CHECK_CONDITION;
atapi_request_sense(qc);
return;
- }
-
- else if (unlikely(err_mask))
+ } else if (unlikely(err_mask)) {
/* FIXME: not quite right; we don't want the
* translation of taskfile registers into
* a sense descriptors, since that's only
* correct for ATA, not ATAPI
*/
ata_gen_ata_desc_sense(qc);
-
- else {
+ } else {
u8 *scsicmd = cmd->cmnd;
if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
qc->tf.protocol = ATA_PROT_ATAPI_DMA;
qc->tf.feature |= ATAPI_PKT_DMA;
-#ifdef ATAPI_ENABLE_DMADIR
- /* some SATA bridges need us to indicate data xfer direction */
- if (cmd->sc_data_direction != DMA_TO_DEVICE)
+ if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
+ /* some SATA bridges need us to indicate data xfer direction */
qc->tf.feature |= ATAPI_DMADIR;
-#endif
}
- qc->nbytes = cmd->bufflen;
+ qc->nbytes = cmd->request_bufflen;
return 0;
}
+static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
+{
+ if (likely(id < ATA_MAX_DEVICES))
+ return &ap->device[id];
+ return NULL;
+}
+
+static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
+ const struct scsi_device *scsidev)
+{
+ /* skip commands not addressed to targets we simulate */
+ if (unlikely(scsidev->channel || scsidev->lun))
+ return NULL;
+
+ return ata_find_dev(ap, scsidev->id);
+}
+
/**
* ata_scsi_find_dev - lookup ata_device from scsi_cmnd
* @ap: ATA port to which the device is attached
* RETURNS:
* Associated ATA device, or %NULL if not found.
*/
-
static struct ata_device *
ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
{
- struct ata_device *dev;
-
- /* skip commands not addressed to targets we simulate */
- if (likely(scsidev->id < ATA_MAX_DEVICES))
- dev = &ap->device[scsidev->id];
- else
- return NULL;
+ struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
- if (unlikely((scsidev->channel != 0) ||
- (scsidev->lun != 0)))
- return NULL;
-
- if (unlikely(!ata_dev_present(dev)))
+ if (unlikely(!dev || !ata_dev_enabled(dev)))
return NULL;
if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
if (unlikely(dev->class == ATA_DEV_ATAPI)) {
- printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
- ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
+ ata_dev_printk(dev, KERN_WARNING,
+ "WARNING: ATAPI is %s, device ignored.\n",
+ atapi_enabled ? "not supported with this driver" : "disabled");
return NULL;
}
}
{
struct ata_taskfile *tf = &(qc->tf);
struct scsi_cmnd *cmd = qc->scsicmd;
+ struct ata_device *dev = qc->dev;
if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
goto invalid_fld;
+ /* We may not issue DMA commands if no DMA mode is set */
+ if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
+ goto invalid_fld;
+
if (scsicmd[1] & 0xe0)
/* PIO multi not supported yet */
goto invalid_fld;
* TODO: find out if we need to do more here to
* cover scatter/gather case.
*/
- qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
+ qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
+ /* request result TF */
+ qc->flags |= ATA_QCFLAG_RESULT_TF;
+
return 0;
invalid_fld:
#endif
}
-static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
- struct ata_port *ap, struct ata_device *dev)
+static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
+ void (*done)(struct scsi_cmnd *),
+ struct ata_device *dev)
{
+ int rc = 0;
+
if (dev->class == ATA_DEV_ATA) {
ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
cmd->cmnd[0]);
if (xlat_func)
- ata_scsi_translate(ap, dev, cmd, done, xlat_func);
+ rc = ata_scsi_translate(dev, cmd, done, xlat_func);
else
- ata_scsi_simulate(ap, dev, cmd, done);
+ ata_scsi_simulate(dev, cmd, done);
} else
- ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
+ rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
+
+ return rc;
}
/**
* Releases scsi-layer-held lock, and obtains host_set lock.
*
* RETURNS:
- * Zero.
+ * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
+ * 0 otherwise.
*/
-
int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
struct ata_port *ap;
struct ata_device *dev;
struct scsi_device *scsidev = cmd->device;
struct Scsi_Host *shost = scsidev->host;
+ int rc = 0;
- ap = (struct ata_port *) &shost->hostdata[0];
+ ap = ata_shost_to_port(shost);
spin_unlock(shost->host_lock);
spin_lock(&ap->host_set->lock);
dev = ata_scsi_find_dev(ap, scsidev);
if (likely(dev))
- __ata_scsi_queuecmd(cmd, done, ap, dev);
+ rc = __ata_scsi_queuecmd(cmd, done, dev);
else {
cmd->result = (DID_BAD_TARGET << 16);
done(cmd);
spin_unlock(&ap->host_set->lock);
spin_lock(shost->host_lock);
- return 0;
+ return rc;
}
/**
* ata_scsi_simulate - simulate SCSI command on ATA device
- * @ap: port the device is connected to
* @dev: the target device
* @cmd: SCSI command being sent to device.
* @done: SCSI command completion function.
* spin_lock_irqsave(host_set lock)
*/
-void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
- struct scsi_cmnd *cmd,
+void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
struct ata_scsi_args args;
const u8 *scsicmd = cmd->cmnd;
- args.ap = ap;
args.dev = dev;
args.id = dev->id;
args.cmd = cmd;
void ata_scsi_scan_host(struct ata_port *ap)
{
- struct ata_device *dev;
unsigned int i;
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
+ if (ap->flags & ATA_FLAG_DISABLED)
return;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
+ struct ata_device *dev = &ap->device[i];
+ struct scsi_device *sdev;
+
+ if (!ata_dev_enabled(dev) || dev->sdev)
+ continue;
+
+ sdev = __scsi_add_device(ap->host, 0, i, 0, NULL);
+ if (!IS_ERR(sdev)) {
+ dev->sdev = sdev;
+ scsi_device_put(sdev);
+ }
+ }
+}
+
+/**
+ * ata_scsi_offline_dev - offline attached SCSI device
+ * @dev: ATA device to offline attached SCSI device for
+ *
+ * This function is called from ata_eh_hotplug() and responsible
+ * for taking the SCSI device attached to @dev offline. This
+ * function is called with host_set lock which protects dev->sdev
+ * against clearing.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * 1 if attached SCSI device exists, 0 otherwise.
+ */
+int ata_scsi_offline_dev(struct ata_device *dev)
+{
+ if (dev->sdev) {
+ scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * ata_scsi_remove_dev - remove attached SCSI device
+ * @dev: ATA device to remove attached SCSI device for
+ *
+ * This function is called from ata_eh_scsi_hotplug() and
+ * responsible for removing the SCSI device attached to @dev.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+static void ata_scsi_remove_dev(struct ata_device *dev)
+{
+ struct ata_port *ap = dev->ap;
+ struct scsi_device *sdev;
+ unsigned long flags;
+
+ /* Alas, we need to grab scan_mutex to ensure SCSI device
+ * state doesn't change underneath us and thus
+ * scsi_device_get() always succeeds. The mutex locking can
+ * be removed if there is __scsi_device_get() interface which
+ * increments reference counts regardless of device state.
+ */
+ mutex_lock(&ap->host->scan_mutex);
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+
+ /* clearing dev->sdev is protected by host_set lock */
+ sdev = dev->sdev;
+ dev->sdev = NULL;
+
+ if (sdev) {
+ /* If user initiated unplug races with us, sdev can go
+ * away underneath us after the host_set lock and
+ * scan_mutex are released. Hold onto it.
+ */
+ if (scsi_device_get(sdev) == 0) {
+ /* The following ensures the attached sdev is
+ * offline on return from ata_scsi_offline_dev()
+ * regardless it wins or loses the race
+ * against this function.
+ */
+ scsi_device_set_state(sdev, SDEV_OFFLINE);
+ } else {
+ WARN_ON(1);
+ sdev = NULL;
+ }
+ }
+
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ mutex_unlock(&ap->host->scan_mutex);
+
+ if (sdev) {
+ ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
+ sdev->sdev_gendev.bus_id);
+
+ scsi_remove_device(sdev);
+ scsi_device_put(sdev);
+ }
+}
- if (ata_dev_present(dev))
- scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
+/**
+ * ata_scsi_hotplug - SCSI part of hotplug
+ * @data: Pointer to ATA port to perform SCSI hotplug on
+ *
+ * Perform SCSI part of hotplug. It's executed from a separate
+ * workqueue after EH completes. This is necessary because SCSI
+ * hot plugging requires working EH and hot unplugging is
+ * synchronized with hot plugging with a mutex.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+void ata_scsi_hotplug(void *data)
+{
+ struct ata_port *ap = data;
+ int i;
+
+ if (ap->flags & ATA_FLAG_UNLOADING) {
+ DPRINTK("ENTER/EXIT - unloading\n");
+ return;
}
+
+ DPRINTK("ENTER\n");
+
+ /* unplug detached devices */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ unsigned long flags;
+
+ if (!(dev->flags & ATA_DFLAG_DETACHED))
+ continue;
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ dev->flags &= ~ATA_DFLAG_DETACHED;
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ ata_scsi_remove_dev(dev);
+ }
+
+ /* scan for new ones */
+ ata_scsi_scan_host(ap);
+
+ /* If we scanned while EH was in progress, scan would have
+ * failed silently. Requeue if there are enabled but
+ * unattached devices.
+ */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ if (ata_dev_enabled(dev) && !dev->sdev) {
+ queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
+ break;
+ }
+ }
+
+ DPRINTK("EXIT\n");
}
+/**
+ * ata_scsi_user_scan - indication for user-initiated bus scan
+ * @shost: SCSI host to scan
+ * @channel: Channel to scan
+ * @id: ID to scan
+ * @lun: LUN to scan
+ *
+ * This function is called when user explicitly requests bus
+ * scan. Set probe pending flag and invoke EH.
+ *
+ * LOCKING:
+ * SCSI layer (we don't care)
+ *
+ * RETURNS:
+ * Zero.
+ */
+static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
+ unsigned int id, unsigned int lun)
+{
+ struct ata_port *ap = ata_shost_to_port(shost);
+ unsigned long flags;
+ int rc = 0;
+
+ if (!ap->ops->error_handler)
+ return -EOPNOTSUPP;
+
+ if ((channel != SCAN_WILD_CARD && channel != 0) ||
+ (lun != SCAN_WILD_CARD && lun != 0))
+ return -EINVAL;
+
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+
+ if (id == SCAN_WILD_CARD) {
+ ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
+ ap->eh_info.action |= ATA_EH_SOFTRESET;
+ } else {
+ struct ata_device *dev = ata_find_dev(ap, id);
+
+ if (dev) {
+ ap->eh_info.probe_mask |= 1 << dev->devno;
+ ap->eh_info.action |= ATA_EH_SOFTRESET;
+ } else
+ rc = -EINVAL;
+ }
+
+ if (rc == 0)
+ ata_port_schedule_eh(ap);
+
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+
+ return rc;
+}
+
+/**
+ * ata_scsi_dev_rescan - initiate scsi_rescan_device()
+ * @data: Pointer to ATA port to perform scsi_rescan_device()
+ *
+ * After ATA pass thru (SAT) commands are executed successfully,
+ * libata need to propagate the changes to SCSI layer. This
+ * function must be executed from ata_aux_wq such that sdev
+ * attach/detach don't race with rescan.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep).
+ */
+void ata_scsi_dev_rescan(void *data)
+{
+ struct ata_port *ap = data;
+ struct ata_device *dev;
+ unsigned int i;
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ dev = &ap->device[i];
+
+ if (ata_dev_enabled(dev) && dev->sdev)
+ scsi_rescan_device(&(dev->sdev->sdev_gendev));
+ }
+}
projects / cascardo / linux.git / commitdiff