#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
-#include <asm/semaphore.h>
#include <asm/byteorder.h>
#include <linux/cdrom.h>
const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
const struct ata_port_operations ata_base_port_ops = {
- .irq_clear = ata_noop_irq_clear,
.prereset = ata_std_prereset,
- .hardreset = sata_std_hardreset,
.postreset = ata_std_postreset,
.error_handler = ata_std_error_handler,
};
.inherits = &ata_base_port_ops,
.qc_defer = ata_std_qc_defer,
- .dev_select = ata_noop_dev_select,
-};
-
-const struct ata_port_operations sata_pmp_port_ops = {
- .inherits = &sata_port_ops,
-
- .pmp_prereset = sata_pmp_std_prereset,
- .pmp_hardreset = sata_pmp_std_hardreset,
- .pmp_postreset = sata_pmp_std_postreset,
- .error_handler = sata_pmp_error_handler,
+ .hardreset = sata_std_hardreset,
};
static unsigned int ata_dev_init_params(struct ata_device *dev,
}
}
-/**
- * ata_noop_irq_clear - Noop placeholder for irq_clear
- * @ap: Port associated with this ATA transaction.
- */
-void ata_noop_irq_clear(struct ata_port *ap)
-{
-}
-
/**
* ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
* @tf: Taskfile to convert
return 0;
}
-/**
- * ata_noop_dev_select - Select device 0/1 on ATA bus
- * @ap: ATA channel to manipulate
- * @device: ATA device (numbered from zero) to select
- *
- * This function performs no actual function.
- *
- * May be used as the dev_select() entry in ata_port_operations.
- *
- * LOCKING:
- * caller.
- */
-void ata_noop_dev_select(struct ata_port *ap, unsigned int device)
-{
-}
-
/**
* ata_dump_id - IDENTIFY DEVICE info debugging output
* @id: IDENTIFY DEVICE page to dump
* changed notifications and ATAPI ANs.
*/
if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
- (!ap->nr_pmp_links ||
+ (!sata_pmp_attached(ap) ||
sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
unsigned int err_mask;
* LOCKING:
* None.
*/
-void sata_print_link_status(struct ata_link *link)
+static void sata_print_link_status(struct ata_link *link)
{
u32 sstatus, scontrol, tmp;
* RETURNS:
* 1 if SATA spd configuration is needed, 0 otherwise.
*/
-int sata_set_spd_needed(struct ata_link *link)
+static int sata_set_spd_needed(struct ata_link *link)
{
u32 scontrol;
if (rc)
return rc;
- /* Old CFA may refuse this command, which is just fine */
- if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
- ign_dev_err = 1;
-
- /* Some very old devices and some bad newer ones fail any kind of
- SET_XFERMODE request but support PIO0-2 timings and no IORDY */
- if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) &&
- dev->pio_mode <= XFER_PIO_2)
- ign_dev_err = 1;
-
+ if (dev->xfer_shift == ATA_SHIFT_PIO) {
+ /* Old CFA may refuse this command, which is just fine */
+ if (ata_id_is_cfa(dev->id))
+ ign_dev_err = 1;
+ /* Catch several broken garbage emulations plus some pre
+ ATA devices */
+ if (ata_id_major_version(dev->id) == 0 &&
+ dev->pio_mode <= XFER_PIO_2)
+ ign_dev_err = 1;
+ /* Some very old devices and some bad newer ones fail
+ any kind of SET_XFERMODE request but support PIO0-2
+ timings and no IORDY */
+ if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
+ ign_dev_err = 1;
+ }
/* Early MWDMA devices do DMA but don't allow DMA mode setting.
Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
return rc;
}
+/**
+ * ata_wait_ready - wait for link to become ready
+ * @link: link to be waited on
+ * @deadline: deadline jiffies for the operation
+ * @check_ready: callback to check link readiness
+ *
+ * Wait for @link to become ready. @check_ready should return
+ * positive number if @link is ready, 0 if it isn't, -ENODEV if
+ * link doesn't seem to be occupied, other errno for other error
+ * conditions.
+ *
+ * Transient -ENODEV conditions are allowed for
+ * ATA_TMOUT_FF_WAIT.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 if @linke is ready before @deadline; otherwise, -errno.
+ */
+int ata_wait_ready(struct ata_link *link, unsigned long deadline,
+ int (*check_ready)(struct ata_link *link))
+{
+ unsigned long start = jiffies;
+ unsigned long nodev_deadline = start + ATA_TMOUT_FF_WAIT;
+ int warned = 0;
+
+ if (time_after(nodev_deadline, deadline))
+ nodev_deadline = deadline;
+
+ while (1) {
+ unsigned long now = jiffies;
+ int ready, tmp;
+
+ ready = tmp = check_ready(link);
+ if (ready > 0)
+ return 0;
+
+ /* -ENODEV could be transient. Ignore -ENODEV if link
+ * is online. Also, some SATA devices take a long
+ * time to clear 0xff after reset. For example,
+ * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
+ * GoVault needs even more than that. Wait for
+ * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
+ *
+ * Note that some PATA controllers (pata_ali) explode
+ * if status register is read more than once when
+ * there's no device attached.
+ */
+ if (ready == -ENODEV) {
+ if (ata_link_online(link))
+ ready = 0;
+ else if ((link->ap->flags & ATA_FLAG_SATA) &&
+ !ata_link_offline(link) &&
+ time_before(now, nodev_deadline))
+ ready = 0;
+ }
+
+ if (ready)
+ return ready;
+ if (time_after(now, deadline))
+ return -EBUSY;
+
+ if (!warned && time_after(now, start + 5 * HZ) &&
+ (deadline - now > 3 * HZ)) {
+ ata_link_printk(link, KERN_WARNING,
+ "link is slow to respond, please be patient "
+ "(ready=%d)\n", tmp);
+ warned = 1;
+ }
+
+ msleep(50);
+ }
+}
+
+/**
+ * ata_wait_after_reset - wait for link to become ready after reset
+ * @link: link to be waited on
+ * @deadline: deadline jiffies for the operation
+ * @check_ready: callback to check link readiness
+ *
+ * Wait for @link to become ready after reset.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 if @linke is ready before @deadline; otherwise, -errno.
+ */
+int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
+ int (*check_ready)(struct ata_link *link))
+{
+ msleep(ATA_WAIT_AFTER_RESET_MSECS);
+
+ return ata_wait_ready(link, deadline, check_ready);
+}
+
/**
* sata_link_debounce - debounce SATA phy status
* @link: ATA link to debounce SATA phy status for
int sata_link_resume(struct ata_link *link, const unsigned long *params,
unsigned long deadline)
{
- u32 scontrol;
+ u32 scontrol, serror;
int rc;
if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
*/
msleep(200);
- return sata_link_debounce(link, params, deadline);
+ if ((rc = sata_link_debounce(link, params, deadline)))
+ return rc;
+
+ /* Clear SError. PMP and some host PHYs require this to
+ * operate and clearing should be done before checking PHY
+ * online status to avoid race condition (hotplugging between
+ * link resume and status check).
+ */
+ if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
+ rc = sata_scr_write(link, SCR_ERROR, serror);
+ if (rc == 0 || rc == -EINVAL) {
+ unsigned long flags;
+
+ spin_lock_irqsave(link->ap->lock, flags);
+ link->eh_info.serror = 0;
+ spin_unlock_irqrestore(link->ap->lock, flags);
+ rc = 0;
+ }
+ return rc;
}
/**
"link for reset (errno=%d)\n", rc);
}
- /* wait for !BSY if we don't know that no device is attached */
- if (!ata_link_offline(link)) {
- rc = ata_wait_ready(ap, deadline);
- if (rc && rc != -ENODEV) {
- ata_link_printk(link, KERN_WARNING, "device not ready "
- "(errno=%d), forcing hardreset\n", rc);
- ehc->i.action |= ATA_EH_HARDRESET;
- }
- }
+ /* no point in trying softreset on offline link */
+ if (ata_link_offline(link))
+ ehc->i.action &= ~ATA_EH_SOFTRESET;
return 0;
}
* @link: link to reset
* @timing: timing parameters { interval, duratinon, timeout } in msec
* @deadline: deadline jiffies for the operation
+ * @online: optional out parameter indicating link onlineness
+ * @check_ready: optional callback to check link readiness
*
* SATA phy-reset @link using DET bits of SControl register.
+ * After hardreset, link readiness is waited upon using
+ * ata_wait_ready() if @check_ready is specified. LLDs are
+ * allowed to not specify @check_ready and wait itself after this
+ * function returns. Device classification is LLD's
+ * responsibility.
+ *
+ * *@online is set to one iff reset succeeded and @link is online
+ * after reset.
*
* LOCKING:
* Kernel thread context (may sleep)
* 0 on success, -errno otherwise.
*/
int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
- unsigned long deadline)
+ unsigned long deadline,
+ bool *online, int (*check_ready)(struct ata_link *))
{
u32 scontrol;
int rc;
DPRINTK("ENTER\n");
+ if (online)
+ *online = false;
+
if (sata_set_spd_needed(link)) {
/* SATA spec says nothing about how to reconfigure
* spd. To be on the safe side, turn off phy during
/* bring link back */
rc = sata_link_resume(link, timing, deadline);
+ if (rc)
+ goto out;
+ /* if link is offline nothing more to do */
+ if (ata_link_offline(link))
+ goto out;
+
+ /* Link is online. From this point, -ENODEV too is an error. */
+ if (online)
+ *online = true;
+
+ if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
+ /* If PMP is supported, we have to do follow-up SRST.
+ * Some PMPs don't send D2H Reg FIS after hardreset if
+ * the first port is empty. Wait only for
+ * ATA_TMOUT_PMP_SRST_WAIT.
+ */
+ if (check_ready) {
+ unsigned long pmp_deadline;
+
+ pmp_deadline = jiffies + ATA_TMOUT_PMP_SRST_WAIT;
+ if (time_after(pmp_deadline, deadline))
+ pmp_deadline = deadline;
+ ata_wait_ready(link, pmp_deadline, check_ready);
+ }
+ rc = -EAGAIN;
+ goto out;
+ }
+
+ rc = 0;
+ if (check_ready)
+ rc = ata_wait_ready(link, deadline, check_ready);
out:
+ if (rc && rc != -EAGAIN)
+ ata_link_printk(link, KERN_ERR,
+ "COMRESET failed (errno=%d)\n", rc);
DPRINTK("EXIT, rc=%d\n", rc);
return rc;
}
+/**
+ * sata_std_hardreset - COMRESET w/o waiting or classification
+ * @link: link to reset
+ * @class: resulting class of attached device
+ * @deadline: deadline jiffies for the operation
+ *
+ * Standard SATA COMRESET w/o waiting or classification.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 if link offline, -EAGAIN if link online, -errno on errors.
+ */
+int sata_std_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
+ bool online;
+ int rc;
+
+ /* do hardreset */
+ rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
+ return online ? -EAGAIN : rc;
+}
+
/**
* ata_std_postreset - standard postreset callback
* @link: the target ata_link
*/
void ata_std_postreset(struct ata_link *link, unsigned int *classes)
{
- struct ata_port *ap = link->ap;
- u32 serror;
-
DPRINTK("ENTER\n");
/* print link status */
sata_print_link_status(link);
- /* clear SError */
- if (sata_scr_read(link, SCR_ERROR, &serror) == 0)
- sata_scr_write(link, SCR_ERROR, serror);
- link->eh_info.serror = 0;
-
- /* is double-select really necessary? */
- if (classes[0] != ATA_DEV_NONE)
- ap->ops->dev_select(ap, 1);
- if (classes[1] != ATA_DEV_NONE)
- ap->ops->dev_select(ap, 0);
-
- /* bail out if no device is present */
- if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) {
- DPRINTK("EXIT, no device\n");
- return;
- }
-
- /* set up device control */
- if (ap->ioaddr.ctl_addr)
- iowrite8(ap->ctl, ap->ioaddr.ctl_addr);
-
DPRINTK("EXIT\n");
}
/* Devices which get the IVB wrong */
{ "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
+ /* Maybe we should just blacklist TSSTcorp... */
+ { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
+ { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
{ "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
{ "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
{ "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
/* If the controller thinks we are 80 wire, we are */
if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
return 0;
+ /* If the system is known to be 40 wire short cable (eg laptop),
+ then we allow 80 wire modes even if the drive isn't sure */
+ if (ap->cbl == ATA_CBL_PATA40_SHORT)
+ return 0;
/* If the controller doesn't know we scan
- Note: We look for all 40 wire detects at this point.
struct ata_port *ap = qc->ap;
qc->result_tf.flags = qc->tf.flags;
- ap->ops->tf_read(ap, &qc->result_tf);
+ ap->ops->qc_fill_rtf(qc);
}
static void ata_verify_xfer(struct ata_queued_cmd *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
* 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 ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
{
int nr_done = 0;
u32 done_mask;
continue;
if ((qc = ata_qc_from_tag(ap, i))) {
- if (finish_qc)
- finish_qc(qc);
ata_qc_complete(qc);
nr_done++;
}
return 0;
}
-int ata_flush_cache(struct ata_device *dev)
-{
- unsigned int err_mask;
- u8 cmd;
-
- if (!ata_try_flush_cache(dev))
- return 0;
-
- if (dev->flags & ATA_DFLAG_FLUSH_EXT)
- cmd = ATA_CMD_FLUSH_EXT;
- else
- cmd = ATA_CMD_FLUSH;
-
- /* This is wrong. On a failed flush we get back the LBA of the lost
- sector and we should (assuming it wasn't aborted as unknown) issue
- a further flush command to continue the writeback until it
- does not error */
- err_mask = ata_do_simple_cmd(dev, cmd);
- if (err_mask) {
- ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n");
- return -EIO;
- }
-
- return 0;
-}
-
#ifdef CONFIG_PM
static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
unsigned int action, unsigned int ehi_flags,
ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
#endif
+#ifdef CONFIG_ATA_SFF
INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
+#endif
INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
INIT_LIST_HEAD(&ap->eh_done_q);
/*
* Dummy port_ops
*/
-static void ata_dummy_noret(struct ata_port *ap) { }
-static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
-static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { }
-
-static u8 ata_dummy_check_status(struct ata_port *ap)
+static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
{
- return ATA_DRDY;
+ return AC_ERR_SYSTEM;
}
-static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
+static void ata_dummy_error_handler(struct ata_port *ap)
{
- return AC_ERR_SYSTEM;
+ /* truly dummy */
}
struct ata_port_operations ata_dummy_port_ops = {
- .check_status = ata_dummy_check_status,
- .check_altstatus = ata_dummy_check_status,
- .dev_select = ata_noop_dev_select,
.qc_prep = ata_noop_qc_prep,
.qc_issue = ata_dummy_qc_issue,
- .freeze = ata_dummy_noret,
- .thaw = ata_dummy_noret,
- .error_handler = ata_dummy_noret,
- .post_internal_cmd = ata_dummy_qc_noret,
- .irq_clear = ata_dummy_noret,
- .port_start = ata_dummy_ret0,
- .port_stop = ata_dummy_noret,
+ .error_handler = ata_dummy_error_handler,
};
const struct ata_port_info ata_dummy_port_info = {
EXPORT_SYMBOL_GPL(sata_deb_timing_long);
EXPORT_SYMBOL_GPL(ata_base_port_ops);
EXPORT_SYMBOL_GPL(sata_port_ops);
-EXPORT_SYMBOL_GPL(sata_pmp_port_ops);
EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
EXPORT_SYMBOL_GPL(ata_dummy_port_info);
EXPORT_SYMBOL_GPL(ata_std_bios_param);
EXPORT_SYMBOL_GPL(ata_sg_init);
EXPORT_SYMBOL_GPL(ata_qc_complete);
EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
-EXPORT_SYMBOL_GPL(ata_noop_dev_select);
-EXPORT_SYMBOL_GPL(sata_print_link_status);
EXPORT_SYMBOL_GPL(atapi_cmd_type);
EXPORT_SYMBOL_GPL(ata_tf_to_fis);
EXPORT_SYMBOL_GPL(ata_tf_from_fis);
EXPORT_SYMBOL_GPL(ata_do_set_mode);
EXPORT_SYMBOL_GPL(ata_std_qc_defer);
EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
-EXPORT_SYMBOL_GPL(ata_noop_irq_clear);
EXPORT_SYMBOL_GPL(ata_port_probe);
EXPORT_SYMBOL_GPL(ata_dev_disable);
EXPORT_SYMBOL_GPL(sata_set_spd);
+EXPORT_SYMBOL_GPL(ata_wait_after_reset);
EXPORT_SYMBOL_GPL(sata_link_debounce);
EXPORT_SYMBOL_GPL(sata_link_resume);
+EXPORT_SYMBOL_GPL(ata_std_prereset);
EXPORT_SYMBOL_GPL(sata_link_hardreset);
+EXPORT_SYMBOL_GPL(sata_std_hardreset);
+EXPORT_SYMBOL_GPL(ata_std_postreset);
EXPORT_SYMBOL_GPL(ata_dev_classify);
EXPORT_SYMBOL_GPL(ata_dev_pair);
EXPORT_SYMBOL_GPL(ata_port_disable);
#endif /* CONFIG_PM */
#endif /* CONFIG_PCI */
-EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch);
-EXPORT_SYMBOL_GPL(sata_pmp_std_prereset);
-EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset);
-EXPORT_SYMBOL_GPL(sata_pmp_std_postreset);
-EXPORT_SYMBOL_GPL(sata_pmp_error_handler);
-
EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
projects / linux-2.6-block.git / blobdiff