#include "libata.h"
-static unsigned int ata_dev_init_params(struct ata_port *ap,
- struct ata_device *dev,
- u16 heads,
- u16 sectors);
-static int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
-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);
+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;
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 spd_str[spd - 1];
}
-static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
+void ata_dev_disable(struct ata_device *dev)
{
if (ata_dev_enabled(dev)) {
- printk(KERN_WARNING "ata%u: dev %u disabled\n",
- ap->id, dev->devno);
+ 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
* None. Should be called with kernel context, might sleep.
*/
-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;
DECLARE_COMPLETION(wait);
unsigned long flags;
unsigned int err_mask;
spin_lock_irqsave(&ap->host_set->lock, flags);
- qc = ata_qc_new_init(ap, dev);
- BUG_ON(qc == NULL);
+ /* 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->qactive))
+ 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;
+ ap->active_tag = ATA_TAG_POISON;
+
+ /* 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);
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);
+
+ ata_dev_printk(dev, KERN_WARNING,
+ "qc timeout (cmd 0x%x)\n", command);
}
spin_unlock_irqrestore(&ap->host_set->lock, flags);
}
- *tf = qc->tf;
+ /* 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;
/* 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)
+static 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 ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
+ return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
}
/**
* 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)
+static 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;
/* 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;
/* 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\n",
+ ata_id_major_version(id),
+ ata_mode_string(xfer_mask),
+ (unsigned long long)dev->n_sectors,
+ lba_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);
}
dev->cdb_len = 16;
else if (dev->class == ATA_DEV_ATAPI) {
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;
}
/* 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\n",
+ ata_mode_string(xfer_mask));
}
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;
}
static int ata_bus_probe(struct ata_port *ap)
{
unsigned int classes[ATA_MAX_DEVICES];
- int i, rc, found = 0;
+ int tries[ATA_MAX_DEVICES];
+ int i, rc, down_xfermask;
struct ata_device *dev;
ata_port_probe(ap);
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ tries[i] = ATA_PROBE_MAX_TRIES;
+
+ retry:
+ down_xfermask = 0;
+
/* reset and determine device classes */
for (i = 0; i < ATA_MAX_DEVICES; i++)
classes[i] = ATA_DEV_UNKNOWN;
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);
+ ata_port_printk(ap, KERN_ERR,
+ "reset failed (errno=%d)\n", rc);
return rc;
}
} else {
ap->ops->phy_reset(ap);
- if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
- for (i = 0; i < ATA_MAX_DEVICES; i++)
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ if (!(ap->flags & ATA_FLAG_DISABLED))
classes[i] = ap->device[i].class;
+ ap->device[i].class = ATA_DEV_UNKNOWN;
+ }
ata_port_probe(ap);
}
/* read IDENTIFY page and configure devices */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
dev = &ap->device[i];
- dev->class = classes[i];
- if (!ata_dev_enabled(dev))
- continue;
+ if (tries[i])
+ dev->class = classes[i];
- WARN_ON(dev->id != NULL);
- if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
- dev->class = ATA_DEV_NONE;
+ if (!ata_dev_enabled(dev))
continue;
- }
- if (ata_dev_configure(ap, dev, 1)) {
- ata_dev_disable(ap, dev);
- continue;
- }
+ rc = ata_dev_read_id(dev, &dev->class, 1, dev->id);
+ if (rc)
+ goto fail;
- found = 1;
+ rc = ata_dev_configure(dev, 1);
+ if (rc)
+ goto fail;
}
/* configure transfer mode */
- if (ap->ops->set_mode) {
- /* FIXME: make ->set_mode handle no device case and
- * return error code and failing device on failure as
- * ata_set_mode() does.
- */
- if (found)
- ap->ops->set_mode(ap);
- rc = 0;
- } else {
- while (ata_set_mode(ap, &dev))
- ata_dev_disable(ap, dev);
+ rc = ata_set_mode(ap, &dev);
+ if (rc) {
+ down_xfermask = 1;
+ goto fail;
}
for (i = 0; i < ATA_MAX_DEVICES; i++)
ata_port_disable(ap);
ap->ops->port_disable(ap);
return -ENODEV;
+
+ 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;
+ }
+
+ if (!tries[dev->devno]) {
+ ata_down_xfermask_limit(dev, 1);
+ ata_dev_disable(dev);
+ }
+
+ 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;
+ 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;
- printk(KERN_INFO "ata%u: SATA link up %s (SStatus %X)\n",
- ap->id, sata_spd_string(tmp), 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_enabled(pair))
return NULL;
{
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)));
+ ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
+ ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
return 0;
}
* RETURNS:
* 0 on success, negative errno otherwise
*/
-static int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
{
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++) {
unsigned int pio_mask, dma_mask;
if (!ata_dev_enabled(dev))
continue;
- ata_dev_xfermask(ap, dev);
+ 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);
continue;
if (!dev->pio_mode) {
- printk(KERN_WARNING "ata%u: dev %u no PIO support\n",
- ap->id, dev->devno);
+ ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
rc = -EINVAL;
goto out;
}
if (!ata_dev_enabled(dev))
continue;
- rc = ata_dev_set_mode(ap, dev);
+ rc = ata_dev_set_mode(dev);
if (rc)
goto out;
}
}
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");
{
unsigned long timeout = jiffies + (HZ * 5);
u32 scontrol, sstatus;
+ int rc;
+
+ if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol)))
+ return rc;
- scontrol = scr_read(ap, SCR_CONTROL);
scontrol = (scontrol & 0x0f0) | 0x300;
- scr_write_flush(ap, SCR_CONTROL, scontrol);
+
+ if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol)))
+ return rc;
/* Wait for phy to become ready, if necessary. */
do {
msleep(200);
- sstatus = scr_read(ap, SCR_STATUS);
+ if ((rc = sata_scr_read(ap, SCR_STATUS, &sstatus)))
+ return rc;
if ((sstatus & 0xf) != 1)
return 0;
} while (time_before(jiffies, timeout));
- return -1;
+ return -EBUSY;
}
/**
*/
void ata_std_probeinit(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);
+ u32 scontrol;
+
+ /* resume link */
+ sata_phy_resume(ap);
+
+ /* init sata_spd_limit to the current value */
+ if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
+ int spd = (scontrol >> 4) & 0xf;
+ ap->sata_spd_limit &= (1 << spd) - 1;
}
+
+ /* wait for device */
+ if (ata_port_online(ap))
+ ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
}
/**
* 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
* 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.
* 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 */
- scontrol = scr_read(ap, SCR_CONTROL);
+ 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;
+
+ 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;
- scr_write_flush(ap, SCR_CONTROL, scontrol);
- /*
- * Couldn't find anything in SATA I/II specs, but AHCI-1.1
+ 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 */
+ /* bring phy back */
sata_phy_resume(ap);
/* 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;
}
*/
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_reset_fn_t hardreset;
hardreset = NULL;
- if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read)
+ if (sata_scr_valid(ap))
hardreset = sata_std_hardreset;
return ata_drive_probe_reset(ap, ata_std_probeinit,
ata_std_postreset, classes);
}
-static int ata_do_reset(struct ata_port *ap,
- ata_reset_fn_t reset, ata_postreset_fn_t postreset,
- int verbose, unsigned int *classes)
+int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
+ unsigned int *classes)
{
int i, rc;
for (i = 0; i < ATA_MAX_DEVICES; i++)
classes[i] = ATA_DEV_UNKNOWN;
- rc = reset(ap, verbose, classes);
+ rc = reset(ap, classes);
if (rc)
return rc;
if (classes[i] == ATA_DEV_UNKNOWN)
classes[i] = ATA_DEV_NONE;
- if (postreset)
- postreset(ap, classes);
-
return 0;
}
* - 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)
if (probeinit)
probeinit(ap);
- if (softreset) {
- rc = ata_do_reset(ap, softreset, postreset, 0, classes);
+ if (softreset && !sata_set_spd_needed(ap)) {
+ rc = ata_do_reset(ap, softreset, classes);
if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN)
goto done;
+ ata_port_printk(ap, KERN_INFO, "softreset failed, "
+ "will try hardreset in 5 secs\n");
+ ssleep(5);
}
if (!hardreset)
goto done;
- rc = ata_do_reset(ap, hardreset, postreset, 0, classes);
- if (rc || classes[0] != ATA_DEV_UNKNOWN)
- goto done;
+ while (1) {
+ rc = ata_do_reset(ap, hardreset, classes);
+ if (rc == 0) {
+ if (classes[0] != ATA_DEV_UNKNOWN)
+ goto done;
+ break;
+ }
- if (softreset)
- rc = ata_do_reset(ap, softreset, postreset, 0, classes);
+ if (sata_down_spd_limit(ap))
+ goto done;
+
+ ata_port_printk(ap, KERN_INFO, "hardreset failed, "
+ "will retry in 5 secs\n");
+ ssleep(5);
+ }
+
+ if (softreset) {
+ ata_port_printk(ap, KERN_INFO,
+ "hardreset succeeded without classification, "
+ "will retry softreset in 5 secs\n");
+ ssleep(5);
+
+ rc = ata_do_reset(ap, softreset, classes);
+ }
done:
- if (rc == 0 && classes[0] == ATA_DEV_UNKNOWN)
- rc = -ENODEV;
+ if (rc == 0) {
+ if (postreset)
+ postreset(ap, classes);
+ if (classes[0] == ATA_DEV_UNKNOWN)
+ rc = -ENODEV;
+ }
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_enabled(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_enabled(d))
+
+ if (ata_dev_absent(d))
continue;
- xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
- d->udma_mask);
+
+ 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_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
+ * @sectors: Number of sectors
*
* LOCKING:
* Kernel thread context (may sleep)
* 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;
/**
* ata_pio_poll - poll using PIO, depending on current state
- * @ap: the target ata_port
+ * @qc: qc in progress
*
* LOCKING:
* None. (executing in kernel thread context)
* RETURNS:
* timeout value to use
*/
-
-static unsigned long ata_pio_poll(struct ata_port *ap)
+static unsigned long ata_pio_poll(struct ata_queued_cmd *qc)
{
- struct ata_queued_cmd *qc;
+ struct ata_port *ap = qc->ap;
u8 status;
unsigned int poll_state = HSM_ST_UNKNOWN;
unsigned int reg_state = HSM_ST_UNKNOWN;
- 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:
/**
* ata_pio_complete - check if drive is busy or idle
- * @ap: the target ata_port
+ * @qc: qc to complete
*
* LOCKING:
* None. (executing in kernel thread context)
* RETURNS:
* Non-zero if qc completed, zero otherwise.
*/
-
-static int ata_pio_complete (struct ata_port *ap)
+static int ata_pio_complete(struct ata_queued_cmd *qc)
{
- struct ata_queued_cmd *qc;
+ struct ata_port *ap = qc->ap;
u8 drv_stat;
/*
}
}
- 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);
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);
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
- * @ap: the target ata_port
+ * @qc: qc to transfer block for
*
* LOCKING:
* None. (executing in kernel thread context)
*/
-
-static void ata_pio_block(struct ata_port *ap)
+static void ata_pio_block(struct ata_queued_cmd *qc)
{
- struct ata_queued_cmd *qc;
+ struct ata_port *ap = qc->ap;
u8 status;
/*
}
}
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
-
/* check error */
if (status & (ATA_ERR | ATA_DF)) {
qc->err_mask |= AC_ERR_DEV;
}
}
-static void ata_pio_error(struct ata_port *ap)
+static void ata_pio_error(struct ata_queued_cmd *qc)
{
- struct ata_queued_cmd *qc;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
+ struct ata_port *ap = qc->ap;
if (qc->tf.command != ATA_CMD_PACKET)
- printk(KERN_WARNING "ata%u: PIO error\n", ap->id);
+ ata_dev_printk(qc->dev, KERN_WARNING, "PIO error\n");
/* make sure qc->err_mask is available to
* know what's wrong and recover
static void ata_pio_task(void *_data)
{
- struct ata_port *ap = _data;
+ struct ata_queued_cmd *qc = _data;
+ struct ata_port *ap = qc->ap;
unsigned long timeout;
int qc_completed;
return;
case HSM_ST:
- ata_pio_block(ap);
+ ata_pio_block(qc);
break;
case HSM_ST_LAST:
- qc_completed = ata_pio_complete(ap);
+ qc_completed = ata_pio_complete(qc);
break;
case HSM_ST_POLL:
case HSM_ST_LAST_POLL:
- timeout = ata_pio_poll(ap);
+ timeout = ata_pio_poll(qc);
break;
case HSM_ST_TMOUT:
case HSM_ST_ERR:
- ata_pio_error(ap);
+ ata_pio_error(qc);
return;
}
if (timeout)
- ata_port_queue_task(ap, ata_pio_task, ap, timeout);
+ ata_port_queue_task(ap, ata_pio_task, qc, timeout);
else if (!qc_completed)
goto fsm_start;
}
/**
* atapi_packet_task - Write CDB bytes to hardware
- * @_data: Port to which ATAPI device is attached.
+ * @_data: qc in progress
*
* When device has indicated its readiness to accept
* a CDB, this function is called. Send the CDB.
* LOCKING:
* Kernel thread context (may sleep)
*/
-
static void atapi_packet_task(void *_data)
{
- struct ata_port *ap = _data;
- struct ata_queued_cmd *qc;
+ struct ata_queued_cmd *qc = _data;
+ struct ata_port *ap = qc->ap;
u8 status;
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
- WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
-
/* sleep-wait for BSY to clear */
DPRINTK("busy wait\n");
if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
/* PIO commands are handled by polling */
ap->hsm_task_state = HSM_ST;
- ata_port_queue_task(ap, ata_pio_task, ap, 0);
+ ata_port_queue_task(ap, ata_pio_task, qc, 0);
}
return;
ata_poll_qc_complete(qc);
}
-/**
- * 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)
- */
-
-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;
-
- DPRINTK("ENTER\n");
-
- ap->hsm_task_state = HSM_ST_IDLE;
-
- spin_lock_irqsave(&host_set->lock, flags);
-
- switch (qc->tf.protocol) {
-
- case ATA_PROT_DMA:
- case ATA_PROT_ATAPI_DMA:
- host_stat = ap->ops->bmdma_status(ap);
-
- /* before we do anything else, clear DMA-Start bit */
- ap->ops->bmdma_stop(qc);
-
- /* fall through */
-
- default:
- ata_altstatus(ap);
- drv_stat = ata_chk_status(ap);
-
- /* ack bmdma irq events */
- ap->ops->irq_clear(ap);
-
- 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);
-
- /* complete taskfile transaction */
- qc->err_mask |= ac_err_mask(drv_stat);
- break;
- }
-
- spin_unlock_irqrestore(&host_set->lock, flags);
-
- ata_eh_qc_complete(qc);
-
- DPRINTK("EXIT\n");
-}
-
-/**
- * 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)
-{
- DPRINTK("ENTER\n");
-
- ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag));
-
- DPRINTK("EXIT\n");
-}
-
/**
* ata_qc_new - Request an available ATA command, for queueing
* @ap: Port associated with device @dev
struct ata_queued_cmd *qc = NULL;
unsigned int i;
- for (i = 0; i < ATA_MAX_QUEUE; i++)
+ /* the last tag is reserved for internal command. */
+ for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
if (!test_and_set_bit(i, &ap->qactive)) {
- qc = ata_qc_from_tag(ap, i);
+ 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);
}
if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
ata_sg_clean(qc);
+ /* command should be marked inactive atomically with qc completion */
+ qc->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->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);
+ }
+}
+
static inline int ata_should_dma_map(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
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);
+ ata_port_queue_task(ap, ata_pio_task, qc, 0);
break;
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);
+ ata_port_queue_task(ap, atapi_packet_task, qc, 0);
break;
case ATA_PROT_ATAPI_NODATA:
ap->flags |= ATA_FLAG_NOINTR;
ata_tf_to_host(ap, &qc->tf);
- ata_port_queue_task(ap, atapi_packet_task, ap, 0);
+ ata_port_queue_task(ap, atapi_packet_task, qc, 0);
break;
case ATA_PROT_ATAPI_DMA:
ap->flags |= ATA_FLAG_NOINTR;
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);
+ ata_port_queue_task(ap, atapi_packet_task, qc, 0);
break;
default:
#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 | ATA_FLAG_NOINTR))) {
struct ata_queued_cmd *qc;
qc = ata_qc_from_tag(ap, ap->active_tag);
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;
ap->flags &= ~ATA_FLAG_SUSPENDED;
while (ata_set_mode(ap, &failed_dev))
- ata_dev_disable(ap, failed_dev);
+ ata_dev_disable(failed_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
*
* 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)
{
+ 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;
}
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->sata_spd_limit = UINT_MAX;
ap->active_tag = ATA_TAG_POISON;
ap->last_ctl = 0xFF;
INIT_WORK(&ap->port_task, NULL, NULL);
INIT_LIST_HEAD(&ap->eh_done_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;
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);
(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);
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,
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;
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
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_qc_complete);
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_bmdma_status);
EXPORT_SYMBOL_GPL(ata_bmdma_stop);
EXPORT_SYMBOL_GPL(ata_port_probe);
+EXPORT_SYMBOL_GPL(sata_set_spd);
EXPORT_SYMBOL_GPL(sata_phy_reset);
EXPORT_SYMBOL_GPL(__sata_phy_reset);
EXPORT_SYMBOL_GPL(ata_bus_reset);
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_error);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
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_eh_qc_complete);
+EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
projects / deliverable / linux.git / blobdiff