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-rw-r--r--drivers/scsi/aic94xx/aic94xx_tmf.c9
-rw-r--r--drivers/scsi/isci/task.c9
-rw-r--r--drivers/scsi/libsas/sas_ata.c7
-rw-r--r--drivers/scsi/libsas/sas_discover.c24
-rw-r--r--drivers/scsi/libsas/sas_expander.c5
-rw-r--r--drivers/scsi/libsas/sas_internal.h1
-rw-r--r--drivers/scsi/libsas/sas_port.c7
-rw-r--r--drivers/scsi/libsas/sas_scsi_host.c38
-rw-r--r--drivers/scsi/mvsas/mv_sas.c3
-rw-r--r--drivers/scsi/pm8001/pm8001_sas.c19
-rw-r--r--drivers/scsi/scsi_transport_sas.c23
-rw-r--r--include/scsi/libsas.h9
-rw-r--r--include/scsi/scsi_transport_sas.h6
13 files changed, 116 insertions, 44 deletions
diff --git a/drivers/scsi/aic94xx/aic94xx_tmf.c b/drivers/scsi/aic94xx/aic94xx_tmf.c
index 0add73bdf2a4..50b914ffab94 100644
--- a/drivers/scsi/aic94xx/aic94xx_tmf.c
+++ b/drivers/scsi/aic94xx/aic94xx_tmf.c
@@ -181,7 +181,7 @@ static int asd_clear_nexus_I_T(struct domain_device *dev,
int asd_I_T_nexus_reset(struct domain_device *dev)
{
int res, tmp_res, i;
- struct sas_phy *phy = sas_find_local_phy(dev);
+ struct sas_phy *phy = sas_get_local_phy(dev);
/* Standard mandates link reset for ATA (type 0) and
* hard reset for SSP (type 1) */
int reset_type = (dev->dev_type == SATA_DEV ||
@@ -201,7 +201,7 @@ int asd_I_T_nexus_reset(struct domain_device *dev)
for (i = 0 ; i < 3; i++) {
tmp_res = asd_clear_nexus_I_T(dev, NEXUS_PHASE_RESUME);
if (tmp_res == TC_RESUME)
- return res;
+ goto out;
msleep(500);
}
@@ -211,7 +211,10 @@ int asd_I_T_nexus_reset(struct domain_device *dev)
dev_printk(KERN_ERR, &phy->dev,
"Failed to resume nexus after reset 0x%x\n", tmp_res);
- return TMF_RESP_FUNC_FAILED;
+ res = TMF_RESP_FUNC_FAILED;
+ out:
+ sas_put_local_phy(phy);
+ return res;
}
static int asd_clear_nexus_I_T_L(struct domain_device *dev, u8 *lun)
diff --git a/drivers/scsi/isci/task.c b/drivers/scsi/isci/task.c
index 4bd88ef83cdf..b96e6044eda9 100644
--- a/drivers/scsi/isci/task.c
+++ b/drivers/scsi/isci/task.c
@@ -1332,7 +1332,7 @@ isci_task_request_complete(struct isci_host *ihost,
static int isci_reset_device(struct isci_host *ihost,
struct isci_remote_device *idev)
{
- struct sas_phy *phy = sas_find_local_phy(idev->domain_dev);
+ struct sas_phy *phy = sas_get_local_phy(idev->domain_dev);
enum sci_status status;
unsigned long flags;
int rc;
@@ -1347,8 +1347,8 @@ static int isci_reset_device(struct isci_host *ihost,
dev_dbg(&ihost->pdev->dev,
"%s: sci_remote_device_reset(%p) returned %d!\n",
__func__, idev, status);
-
- return TMF_RESP_FUNC_FAILED;
+ rc = TMF_RESP_FUNC_FAILED;
+ goto out;
}
spin_unlock_irqrestore(&ihost->scic_lock, flags);
@@ -1369,7 +1369,8 @@ static int isci_reset_device(struct isci_host *ihost,
}
dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev);
-
+ out:
+ sas_put_local_phy(phy);
return rc;
}
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 5fdb63ad94b7..92f7e78a096c 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -284,9 +284,10 @@ static int smp_ata_check_ready(struct ata_link *link)
struct ata_port *ap = link->ap;
struct domain_device *dev = ap->private_data;
struct domain_device *ex_dev = dev->parent;
- struct sas_phy *phy = sas_find_local_phy(dev);
+ struct sas_phy *phy = sas_get_local_phy(dev);
res = sas_get_phy_attached_sas_addr(ex_dev, phy->number, addr);
+ sas_put_local_phy(phy);
/* break the wait early if the expander is unreachable,
* otherwise keep polling
*/
@@ -319,10 +320,10 @@ static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
int ret = 0, res;
+ struct sas_phy *phy;
struct ata_port *ap = link->ap;
int (*check_ready)(struct ata_link *link);
struct domain_device *dev = ap->private_data;
- struct sas_phy *phy = sas_find_local_phy(dev);
struct sas_internal *i = dev_to_sas_internal(dev);
res = i->dft->lldd_I_T_nexus_reset(dev);
@@ -330,10 +331,12 @@ static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
if (res != TMF_RESP_FUNC_COMPLETE)
SAS_DPRINTK("%s: Unable to reset ata device?\n", __func__);
+ phy = sas_get_local_phy(dev);
if (scsi_is_sas_phy_local(phy))
check_ready = local_ata_check_ready;
else
check_ready = smp_ata_check_ready;
+ sas_put_local_phy(phy);
ret = ata_wait_after_reset(link, deadline, check_ready);
if (ret && ret != -EAGAIN)
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index c56cc6400819..789b50861bb9 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -147,6 +147,7 @@ static int sas_get_port_device(struct asd_sas_port *port)
memset(port->disc.eeds_a, 0, SAS_ADDR_SIZE);
memset(port->disc.eeds_b, 0, SAS_ADDR_SIZE);
port->disc.max_level = 0;
+ sas_device_set_phy(dev, port->port);
dev->rphy = rphy;
@@ -234,6 +235,9 @@ void sas_free_device(struct kref *kref)
if (dev->parent)
sas_put_device(dev->parent);
+ sas_port_put_phy(dev->phy);
+ dev->phy = NULL;
+
/* remove the phys and ports, everything else should be gone */
if (dev->dev_type == EDGE_DEV || dev->dev_type == FANOUT_DEV)
kfree(dev->ex_dev.ex_phy);
@@ -308,6 +312,26 @@ void sas_unregister_domain_devices(struct asd_sas_port *port)
}
+void sas_device_set_phy(struct domain_device *dev, struct sas_port *port)
+{
+ struct sas_ha_struct *ha;
+ struct sas_phy *new_phy;
+
+ if (!dev)
+ return;
+
+ ha = dev->port->ha;
+ new_phy = sas_port_get_phy(port);
+
+ /* pin and record last seen phy */
+ spin_lock_irq(&ha->phy_port_lock);
+ if (new_phy) {
+ sas_port_put_phy(dev->phy);
+ dev->phy = new_phy;
+ }
+ spin_unlock_irq(&ha->phy_port_lock);
+}
+
/* ---------- Discovery and Revalidation ---------- */
/**
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 6fb1f3afd1e0..68a80a00f73f 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -723,6 +723,7 @@ static struct domain_device *sas_ex_discover_end_dev(
}
}
sas_ex_get_linkrate(parent, child, phy);
+ sas_device_set_phy(child, phy->port);
#ifdef CONFIG_SCSI_SAS_ATA
if ((phy->attached_tproto & SAS_PROTOCOL_STP) || phy->attached_sata_dev) {
@@ -1810,7 +1811,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent,
{
struct expander_device *ex_dev = &parent->ex_dev;
struct ex_phy *phy = &ex_dev->ex_phy[phy_id];
- struct domain_device *child, *n;
+ struct domain_device *child, *n, *found = NULL;
if (last) {
list_for_each_entry_safe(child, n,
&ex_dev->children, siblings) {
@@ -1822,6 +1823,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent,
sas_unregister_ex_tree(parent->port, child);
else
sas_unregister_dev(parent->port, child);
+ found = child;
break;
}
}
@@ -1830,6 +1832,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent,
memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE);
if (phy->port) {
sas_port_delete_phy(phy->port, phy->phy);
+ sas_device_set_phy(found, phy->port);
if (phy->port->num_phys == 0)
sas_port_delete(phy->port);
phy->port = NULL;
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index a9a3bb94c1bc..c8febc71c40d 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -87,6 +87,7 @@ int sas_smp_phy_control(struct domain_device *dev, int phy_id,
enum phy_func phy_func, struct sas_phy_linkrates *);
int sas_smp_get_phy_events(struct sas_phy *phy);
+void sas_device_set_phy(struct domain_device *dev, struct sas_port *port);
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);
int sas_get_phy_attached_sas_addr(struct domain_device *dev, int phy_id,
diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c
index 2980bde4e34a..31adcd1b4191 100644
--- a/drivers/scsi/libsas/sas_port.c
+++ b/drivers/scsi/libsas/sas_port.c
@@ -108,9 +108,6 @@ static void sas_form_port(struct asd_sas_phy *phy)
port->num_phys++;
port->phy_mask |= (1U << phy->id);
- if (!port->phy)
- port->phy = phy->phy;
-
if (*(u64 *)port->attached_sas_addr == 0) {
port->class = phy->class;
memcpy(port->attached_sas_addr, phy->attached_sas_addr,
@@ -175,8 +172,10 @@ void sas_deform_port(struct asd_sas_phy *phy, int gone)
sas_unregister_domain_devices(port);
sas_port_delete(port->port);
port->port = NULL;
- } else
+ } else {
sas_port_delete_phy(port->port, phy->phy);
+ sas_device_set_phy(dev, port->port);
+ }
if (si->dft->lldd_port_deformed)
si->dft->lldd_port_deformed(phy);
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 5cc44fddfe95..94ef76316c31 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -439,30 +439,26 @@ static int sas_recover_I_T(struct domain_device *dev)
return res;
}
-/* Find the sas_phy that's attached to this device */
-struct sas_phy *sas_find_local_phy(struct domain_device *dev)
+/* take a reference on the last known good phy for this device */
+struct sas_phy *sas_get_local_phy(struct domain_device *dev)
{
- struct domain_device *pdev = dev->parent;
- struct ex_phy *exphy = NULL;
- int i;
+ struct sas_ha_struct *ha = dev->port->ha;
+ struct sas_phy *phy;
+ unsigned long flags;
- /* Directly attached device */
- if (!pdev)
- return dev->port->phy;
+ /* a published domain device always has a valid phy, it may be
+ * stale, but it is never NULL
+ */
+ BUG_ON(!dev->phy);
- /* Otherwise look in the expander */
- for (i = 0; i < pdev->ex_dev.num_phys; i++)
- if (!memcmp(dev->sas_addr,
- pdev->ex_dev.ex_phy[i].attached_sas_addr,
- SAS_ADDR_SIZE)) {
- exphy = &pdev->ex_dev.ex_phy[i];
- break;
- }
+ spin_lock_irqsave(&ha->phy_port_lock, flags);
+ phy = dev->phy;
+ get_device(&phy->dev);
+ spin_unlock_irqrestore(&ha->phy_port_lock, flags);
- BUG_ON(!exphy);
- return exphy->phy;
+ return phy;
}
-EXPORT_SYMBOL_GPL(sas_find_local_phy);
+EXPORT_SYMBOL_GPL(sas_get_local_phy);
/* Attempt to send a LUN reset message to a device */
int sas_eh_device_reset_handler(struct scsi_cmnd *cmd)
@@ -489,7 +485,7 @@ int sas_eh_device_reset_handler(struct scsi_cmnd *cmd)
int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd)
{
struct domain_device *dev = cmd_to_domain_dev(cmd);
- struct sas_phy *phy = sas_find_local_phy(dev);
+ struct sas_phy *phy = sas_get_local_phy(dev);
int res;
res = sas_phy_reset(phy, 1);
@@ -497,6 +493,8 @@ int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd)
SAS_DPRINTK("Bus reset of %s failed 0x%x\n",
kobject_name(&phy->dev.kobj),
res);
+ sas_put_local_phy(phy);
+
if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
return SUCCESS;
diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index cd882230591f..b68a65390f0d 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -1474,10 +1474,11 @@ static int mvs_debug_issue_ssp_tmf(struct domain_device *dev,
static int mvs_debug_I_T_nexus_reset(struct domain_device *dev)
{
int rc;
- struct sas_phy *phy = sas_find_local_phy(dev);
+ struct sas_phy *phy = sas_get_local_phy(dev);
int reset_type = (dev->dev_type == SATA_DEV ||
(dev->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
rc = sas_phy_reset(phy, reset_type);
+ sas_put_local_phy(phy);
msleep(2000);
return rc;
}
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 310860e37d98..3b11edd4a50c 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -967,12 +967,14 @@ int pm8001_I_T_nexus_reset(struct domain_device *dev)
pm8001_dev = dev->lldd_dev;
pm8001_ha = pm8001_find_ha_by_dev(dev);
- phy = sas_find_local_phy(dev);
+ phy = sas_get_local_phy(dev);
if (dev_is_sata(dev)) {
DECLARE_COMPLETION_ONSTACK(completion_setstate);
- if (scsi_is_sas_phy_local(phy))
- return 0;
+ if (scsi_is_sas_phy_local(phy)) {
+ rc = 0;
+ goto out;
+ }
rc = sas_phy_reset(phy, 1);
msleep(2000);
rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
@@ -981,12 +983,14 @@ int pm8001_I_T_nexus_reset(struct domain_device *dev)
rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
pm8001_dev, 0x01);
wait_for_completion(&completion_setstate);
- } else{
- rc = sas_phy_reset(phy, 1);
- msleep(2000);
+ } else {
+ rc = sas_phy_reset(phy, 1);
+ msleep(2000);
}
PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
pm8001_dev->device_id, rc));
+ out:
+ sas_put_local_phy(phy);
return rc;
}
@@ -998,10 +1002,11 @@ int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
struct pm8001_device *pm8001_dev = dev->lldd_dev;
struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
if (dev_is_sata(dev)) {
- struct sas_phy *phy = sas_find_local_phy(dev);
+ struct sas_phy *phy = sas_get_local_phy(dev);
rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
dev, 1, 0);
rc = sas_phy_reset(phy, 1);
+ sas_put_local_phy(phy);
rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
pm8001_dev, 0x01);
msleep(2000);
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index ab3bd0b5ffd9..7d69a25d2004 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -1060,6 +1060,29 @@ int scsi_is_sas_port(const struct device *dev)
EXPORT_SYMBOL(scsi_is_sas_port);
/**
+ * sas_port_get_phy - try to take a reference on a port member
+ * @port: port to check
+ */
+struct sas_phy *sas_port_get_phy(struct sas_port *port)
+{
+ struct sas_phy *phy;
+
+ mutex_lock(&port->phy_list_mutex);
+ if (list_empty(&port->phy_list))
+ phy = NULL;
+ else {
+ struct list_head *ent = port->phy_list.next;
+
+ phy = list_entry(ent, typeof(*phy), port_siblings);
+ get_device(&phy->dev);
+ }
+ mutex_unlock(&port->phy_list_mutex);
+
+ return phy;
+}
+EXPORT_SYMBOL(sas_port_get_phy);
+
+/**
* sas_port_add_phy - add another phy to a port to form a wide port
* @port: port to add the phy to
* @phy: phy to add
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 2079b18467a1..55bab8633807 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -192,6 +192,7 @@ struct domain_device {
struct domain_device *parent;
struct list_head siblings; /* devices on the same level */
struct asd_sas_port *port; /* shortcut to root of the tree */
+ struct sas_phy *phy;
struct list_head dev_list_node;
struct list_head disco_list_node; /* awaiting probe or destruct */
@@ -243,7 +244,6 @@ struct asd_sas_port {
struct list_head destroy_list;
enum sas_linkrate linkrate;
- struct sas_phy *phy;
struct work_struct work;
/* public: */
@@ -429,6 +429,11 @@ static inline unsigned int to_sas_gpio_od(int device, int bit)
return 3 * device + bit;
}
+static inline void sas_put_local_phy(struct sas_phy *phy)
+{
+ put_device(&phy->dev);
+}
+
#ifdef CONFIG_SCSI_SAS_HOST_SMP
int try_test_sas_gpio_gp_bit(unsigned int od, u8 *data, u8 index, u8 count);
#else
@@ -684,7 +689,7 @@ extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
extern void sas_ssp_task_response(struct device *dev, struct sas_task *task,
struct ssp_response_iu *iu);
-struct sas_phy *sas_find_local_phy(struct domain_device *dev);
+struct sas_phy *sas_get_local_phy(struct domain_device *dev);
int sas_request_addr(struct Scsi_Host *shost, u8 *addr);
diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h
index 42817facaeda..98b3a20a0102 100644
--- a/include/scsi/scsi_transport_sas.h
+++ b/include/scsi/scsi_transport_sas.h
@@ -209,6 +209,12 @@ void sas_port_add_phy(struct sas_port *, struct sas_phy *);
void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
void sas_port_mark_backlink(struct sas_port *);
int scsi_is_sas_port(const struct device *);
+struct sas_phy *sas_port_get_phy(struct sas_port *port);
+static inline void sas_port_put_phy(struct sas_phy *phy)
+{
+ if (phy)
+ put_device(&phy->dev);
+}
extern struct scsi_transport_template *
sas_attach_transport(struct sas_function_template *);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 15:59:40 +0100