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-rw-r--r--drivers/ata/libata-eh.c1
-rw-r--r--drivers/ata/libata.h1
-rw-r--r--drivers/scsi/libsas/sas_ata.c11
-rw-r--r--drivers/scsi/libsas/sas_expander.c2
-rw-r--r--drivers/scsi/libsas/sas_init.c56
-rw-r--r--drivers/scsi/libsas/sas_internal.h1
-rw-r--r--include/linux/libata.h1
-rw-r--r--include/scsi/sas_ata.h4
8 files changed, 74 insertions, 3 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index a9b2820..c61316e 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -863,6 +863,7 @@ void ata_port_wait_eh(struct ata_port *ap)
goto retry;
}
}
+EXPORT_SYMBOL_GPL(ata_port_wait_eh);
static int ata_eh_nr_in_flight(struct ata_port *ap)
{
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 814486d..1fab235 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -151,7 +151,6 @@ extern void ata_eh_acquire(struct ata_port *ap);
extern void ata_eh_release(struct ata_port *ap);
extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
extern void ata_scsi_error(struct Scsi_Host *host);
-extern void ata_port_wait_eh(struct ata_port *ap);
extern void ata_eh_fastdrain_timerfn(unsigned long arg);
extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
extern void ata_dev_disable(struct ata_device *dev);
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 48cadf8..03930a0 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -698,3 +698,14 @@ void sas_ata_schedule_reset(struct domain_device *dev)
ata_port_schedule_eh(ap);
spin_unlock_irqrestore(ap->lock, flags);
}
+
+void sas_ata_wait_eh(struct domain_device *dev)
+{
+ struct ata_port *ap;
+
+ if (!dev_is_sata(dev))
+ return;
+
+ ap = dev->sata_dev.ap;
+ ata_port_wait_eh(ap);
+}
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index f4894b0..d3c1a29b 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -228,7 +228,7 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
}
/* check if we have an existing attached ata device on this expander phy */
-static struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
+struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
{
struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id];
struct domain_device *dev;
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index cb65adf..a15fb86 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -28,6 +28,7 @@
#include <linux/init.h>
#include <linux/device.h>
#include <linux/spinlock.h>
+#include <scsi/sas_ata.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_transport.h>
@@ -195,6 +196,59 @@ static int sas_get_linkerrors(struct sas_phy *phy)
return sas_smp_get_phy_events(phy);
}
+/**
+ * transport_sas_phy_reset - reset a phy and permit libata to manage the link
+ *
+ * phy reset request via sysfs in host workqueue context so we know we
+ * can block on eh and safely traverse the domain_device topology
+ */
+static int transport_sas_phy_reset(struct sas_phy *phy, int hard_reset)
+{
+ int ret;
+ enum phy_func reset_type;
+
+ if (hard_reset)
+ reset_type = PHY_FUNC_HARD_RESET;
+ else
+ reset_type = PHY_FUNC_LINK_RESET;
+
+ if (scsi_is_sas_phy_local(phy)) {
+ struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
+ struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
+ struct asd_sas_phy *asd_phy = sas_ha->sas_phy[phy->number];
+ struct sas_internal *i =
+ to_sas_internal(sas_ha->core.shost->transportt);
+ struct domain_device *dev = NULL;
+
+ if (asd_phy->port)
+ dev = asd_phy->port->port_dev;
+
+ /* validate that dev has been probed */
+ if (dev)
+ dev = sas_find_dev_by_rphy(dev->rphy);
+
+ if (dev && dev_is_sata(dev) && !hard_reset) {
+ sas_ata_schedule_reset(dev);
+ sas_ata_wait_eh(dev);
+ ret = 0;
+ } else
+ ret = i->dft->lldd_control_phy(asd_phy, reset_type, NULL);
+ } else {
+ struct sas_rphy *rphy = dev_to_rphy(phy->dev.parent);
+ struct domain_device *ddev = sas_find_dev_by_rphy(rphy);
+ struct domain_device *ata_dev = sas_ex_to_ata(ddev, phy->number);
+
+ if (ata_dev && !hard_reset) {
+ sas_ata_schedule_reset(ata_dev);
+ sas_ata_wait_eh(ata_dev);
+ ret = 0;
+ } else
+ ret = sas_smp_phy_control(ddev, phy->number, reset_type, NULL);
+ }
+
+ return ret;
+}
+
int sas_phy_enable(struct sas_phy *phy, int enable)
{
int ret;
@@ -300,7 +354,7 @@ static void phy_reset_work(struct work_struct *work)
{
struct sas_phy_data *d = container_of(work, typeof(*d), reset_work);
- d->reset_result = sas_phy_reset(d->phy, d->hard_reset);
+ d->reset_result = transport_sas_phy_reset(d->phy, d->hard_reset);
}
static int sas_phy_setup(struct sas_phy *phy)
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index 9ba65e0..ae9698d 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -85,6 +85,7 @@ int sas_smp_phy_control(struct domain_device *dev, int phy_id,
int sas_smp_get_phy_events(struct sas_phy *phy);
struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
+struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
void sas_hae_reset(struct work_struct *work);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index cafc09a..aa42704 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1147,6 +1147,7 @@ static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
* EH - drivers/ata/libata-eh.c
*/
extern void ata_port_schedule_eh(struct ata_port *ap);
+extern void ata_port_wait_eh(struct ata_port *ap);
extern int ata_link_abort(struct ata_link *link);
extern int ata_port_abort(struct ata_port *ap);
extern int ata_port_freeze(struct ata_port *ap);
diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h
index c0bcd30..da3f377 100644
--- a/include/scsi/sas_ata.h
+++ b/include/scsi/sas_ata.h
@@ -45,6 +45,7 @@ int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
struct list_head *done_q);
void sas_probe_sata(struct work_struct *work);
void sas_ata_schedule_reset(struct domain_device *dev);
+void sas_ata_wait_eh(struct domain_device *dev);
#else
@@ -79,6 +80,9 @@ static inline void sas_ata_schedule_reset(struct domain_device *dev)
{
}
+static inline void sas_ata_wait_eh(struct domain_device *dev)
+{
+}
#endif
#endif /* _SAS_ATA_H_ */
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