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authorDan Williams <dan.j.williams@intel.com>2011-12-04 00:06:57 -0800
committerJames Bottomley <JBottomley@Parallels.com>2012-02-19 14:18:01 -0600
commit2a559f4ba443265b4c58925b48296f1cf81b49f9 (patch)
tree79b2c0ea7e06ce19d00ca097e5df34595afea314 /drivers/scsi
parent81c757bc696284f39f07766f0c2ca67af64ce9bd (diff)
[SCSI] libsas: sas_phy_enable via transport_sas_phy_reset
Execute the link-reset triggered by sas_phy_enable via transport_sas_phy_reset so that it can be managed by libata. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/libsas/sas_init.c57
-rw-r--r--drivers/scsi/libsas/sas_internal.h3
-rw-r--r--drivers/scsi/libsas/sas_scsi_host.c1
3 files changed, 52 insertions, 9 deletions
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index a15fb861dab..53ae893e8b0 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -249,15 +249,15 @@ static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset)
return ret;
}
-int sas_phy_enable(struct sas_phy *phy, int enable)
+static int sas_phy_enable(struct sas_phy *phy, int enable)
{
int ret;
- enum phy_func command;
+ enum phy_func cmd;
if (enable)
- command = PHY_FUNC_LINK_RESET;
+ cmd = PHY_FUNC_LINK_RESET;
else
- command = PHY_FUNC_DISABLE;
+ cmd = PHY_FUNC_DISABLE;
if (scsi_is_sas_phy_local(phy)) {
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
@@ -266,15 +266,21 @@ int sas_phy_enable(struct sas_phy *phy, int enable)
struct sas_internal *i =
to_sas_internal(sas_ha->core.shost->transportt);
- if (!enable) {
+ if (enable)
+ ret = transport_sas_phy_reset(phy, 0);
+ else {
sas_phy_disconnected(asd_phy);
sas_ha->notify_phy_event(asd_phy, PHYE_LOSS_OF_SIGNAL);
+ ret = i->dft->lldd_control_phy(asd_phy, cmd, NULL);
}
- ret = i->dft->lldd_control_phy(asd_phy, command, NULL);
} else {
struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
struct domain_device *ddev = sas_find_dev_by_rphy(rphy);
- ret = sas_smp_phy_control(ddev, phy->number, command, NULL);
+
+ if (enable)
+ ret = transport_sas_phy_reset(phy, 0);
+ else
+ ret = sas_smp_phy_control(ddev, phy->number, cmd, NULL);
}
return ret;
}
@@ -357,6 +363,13 @@ static void phy_reset_work(struct work_struct *work)
d->reset_result = transport_sas_phy_reset(d->phy, d->hard_reset);
}
+static void phy_enable_work(struct work_struct *work)
+{
+ struct sas_phy_data *d = container_of(work, typeof(*d), enable_work);
+
+ d->enable_result = sas_phy_enable(d->phy, d->enable);
+}
+
static int sas_phy_setup(struct sas_phy *phy)
{
struct sas_phy_data *d = kzalloc(sizeof(*d), GFP_KERNEL);
@@ -366,6 +379,7 @@ static int sas_phy_setup(struct sas_phy *phy)
mutex_init(&d->event_lock);
INIT_WORK(&d->reset_work, phy_reset_work);
+ INIT_WORK(&d->enable_work, phy_enable_work);
d->phy = phy;
phy->hostdata = d;
@@ -399,8 +413,35 @@ static int queue_phy_reset(struct sas_phy *phy, int hard_reset)
return rc;
}
+static int queue_phy_enable(struct sas_phy *phy, int enable)
+{
+ struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
+ struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
+ struct sas_phy_data *d = phy->hostdata;
+ int rc;
+
+ if (!d)
+ return -ENOMEM;
+
+ /* libsas workqueue coordinates ata-eh reset with discovery */
+ mutex_lock(&d->event_lock);
+ d->enable_result = 0;
+ d->enable = enable;
+
+ spin_lock_irq(&ha->state_lock);
+ sas_queue_work(ha, &d->enable_work);
+ spin_unlock_irq(&ha->state_lock);
+
+ rc = sas_drain_work(ha);
+ if (rc == 0)
+ rc = d->enable_result;
+ mutex_unlock(&d->event_lock);
+
+ return rc;
+}
+
static struct sas_function_template sft = {
- .phy_enable = sas_phy_enable,
+ .phy_enable = queue_phy_enable,
.phy_reset = queue_phy_reset,
.phy_setup = sas_phy_setup,
.phy_release = sas_phy_release,
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index ae9698d9d85..9e960b2d535 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -45,6 +45,9 @@ struct sas_phy_data {
int hard_reset;
int reset_result;
struct work_struct reset_work;
+ int enable;
+ int enable_result;
+ struct work_struct enable_work;
};
void sas_scsi_recover_host(struct Scsi_Host *shost);
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index af71a6d0eda..5cc44fddfe9 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -1077,7 +1077,6 @@ EXPORT_SYMBOL_GPL(sas_change_queue_type);
EXPORT_SYMBOL_GPL(sas_bios_param);
EXPORT_SYMBOL_GPL(sas_task_abort);
EXPORT_SYMBOL_GPL(sas_phy_reset);
-EXPORT_SYMBOL_GPL(sas_phy_enable);
EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler);
EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler);
EXPORT_SYMBOL_GPL(sas_slave_alloc);