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authorJames Bottomley <JBottomley@Parallels.com>2012-10-02 08:55:12 +0100
committerJames Bottomley <JBottomley@Parallels.com>2012-10-02 08:55:12 +0100
commitfe709ed827d370e6b0c0a9f9456da1c22bdcd118 (patch)
treec5a7fd72a745a5f6656a58acc9a1d277e26f9595 /drivers/ata/libata-core.c
parent1c4cf1d5845b59cdcbfad8e67272cf5b219ab062 (diff)
parent0644f5393e915f13733bcc65f13195ff39aeb63e (diff)
downloadlinux-linaro-stable-fe709ed827d370e6b0c0a9f9456da1c22bdcd118.tar.gz
Merge SCSI misc branch into isci-for-3.6 tag
Diffstat (limited to 'drivers/ata/libata-core.c')
-rw-r--r--drivers/ata/libata-core.c69
1 files changed, 49 insertions, 20 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 8e1039c8e159..abd729fc094a 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5253,16 +5253,20 @@ bool ata_link_offline(struct ata_link *link)
#ifdef CONFIG_PM
static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
unsigned int action, unsigned int ehi_flags,
- int wait)
+ int *async)
{
struct ata_link *link;
unsigned long flags;
- int rc;
+ int rc = 0;
/* Previous resume operation might still be in
* progress. Wait for PM_PENDING to clear.
*/
if (ap->pflags & ATA_PFLAG_PM_PENDING) {
+ if (async) {
+ *async = -EAGAIN;
+ return 0;
+ }
ata_port_wait_eh(ap);
WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
}
@@ -5271,10 +5275,10 @@ static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
spin_lock_irqsave(ap->lock, flags);
ap->pm_mesg = mesg;
- if (wait) {
- rc = 0;
+ if (async)
+ ap->pm_result = async;
+ else
ap->pm_result = &rc;
- }
ap->pflags |= ATA_PFLAG_PM_PENDING;
ata_for_each_link(link, ap, HOST_FIRST) {
@@ -5287,7 +5291,7 @@ static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
spin_unlock_irqrestore(ap->lock, flags);
/* wait and check result */
- if (wait) {
+ if (!async) {
ata_port_wait_eh(ap);
WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
}
@@ -5295,9 +5299,8 @@ static int ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
return rc;
}
-static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
+static int __ata_port_suspend_common(struct ata_port *ap, pm_message_t mesg, int *async)
{
- struct ata_port *ap = to_ata_port(dev);
unsigned int ehi_flags = ATA_EHI_QUIET;
int rc;
@@ -5312,10 +5315,17 @@ static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
if (mesg.event == PM_EVENT_SUSPEND)
ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY;
- rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, 1);
+ rc = ata_port_request_pm(ap, mesg, 0, ehi_flags, async);
return rc;
}
+static int ata_port_suspend_common(struct device *dev, pm_message_t mesg)
+{
+ struct ata_port *ap = to_ata_port(dev);
+
+ return __ata_port_suspend_common(ap, mesg, NULL);
+}
+
static int ata_port_suspend(struct device *dev)
{
if (pm_runtime_suspended(dev))
@@ -5340,16 +5350,22 @@ static int ata_port_poweroff(struct device *dev)
return ata_port_suspend_common(dev, PMSG_HIBERNATE);
}
-static int ata_port_resume_common(struct device *dev)
+static int __ata_port_resume_common(struct ata_port *ap, int *async)
{
- struct ata_port *ap = to_ata_port(dev);
int rc;
rc = ata_port_request_pm(ap, PMSG_ON, ATA_EH_RESET,
- ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 1);
+ ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, async);
return rc;
}
+static int ata_port_resume_common(struct device *dev)
+{
+ struct ata_port *ap = to_ata_port(dev);
+
+ return __ata_port_resume_common(ap, NULL);
+}
+
static int ata_port_resume(struct device *dev)
{
int rc;
@@ -5382,6 +5398,24 @@ static const struct dev_pm_ops ata_port_pm_ops = {
.runtime_idle = ata_port_runtime_idle,
};
+/* sas ports don't participate in pm runtime management of ata_ports,
+ * and need to resume ata devices at the domain level, not the per-port
+ * level. sas suspend/resume is async to allow parallel port recovery
+ * since sas has multiple ata_port instances per Scsi_Host.
+ */
+int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
+{
+ return __ata_port_suspend_common(ap, PMSG_SUSPEND, async);
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_async_suspend);
+
+int ata_sas_port_async_resume(struct ata_port *ap, int *async)
+{
+ return __ata_port_resume_common(ap, async);
+}
+EXPORT_SYMBOL_GPL(ata_sas_port_async_resume);
+
+
/**
* ata_host_suspend - suspend host
* @host: host to suspend
@@ -5927,24 +5961,18 @@ int ata_host_start(struct ata_host *host)
}
/**
- * ata_sas_host_init - Initialize a host struct
+ * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas)
* @host: host to initialize
* @dev: device host is attached to
- * @flags: host flags
* @ops: port_ops
*
- * LOCKING:
- * PCI/etc. bus probe sem.
- *
*/
-/* KILLME - the only user left is ipr */
void ata_host_init(struct ata_host *host, struct device *dev,
- unsigned long flags, struct ata_port_operations *ops)
+ struct ata_port_operations *ops)
{
spin_lock_init(&host->lock);
mutex_init(&host->eh_mutex);
host->dev = dev;
- host->flags = flags;
host->ops = ops;
}
@@ -6388,6 +6416,7 @@ static int __init ata_parse_force_one(char **cur,
{ "nohrst", .lflags = ATA_LFLAG_NO_HRST },
{ "nosrst", .lflags = ATA_LFLAG_NO_SRST },
{ "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
+ { "rstonce", .lflags = ATA_LFLAG_RST_ONCE },
};
char *start = *cur, *p = *cur;
char *id, *val, *endp;