[SCSI] pm8001: enhance error handle for IO patch

Enhance error handle for IO patch, when the port is down, fast return phy
down for task.

Signed-off-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

4 files changed, 84 insertions, 5 deletions

diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c
index 68695b72e1ef..3a121fbd4fc5 100644
--- a/drivers/scsi/pm8001/pm8001_hwi.c
+++ b/drivers/scsi/pm8001/pm8001_hwi.c
@@ -2906,13 +2906,17 @@ hw_event_sas_phy_up(struct pm8001_hba_info *pm8001_ha, void *piomb)
                 le32_to_cpu(pPayload->lr_evt_status_phyid_portid);
         u8 link_rate =
                 (u8)((lr_evt_status_phyid_portid & 0xF0000000) >> 28);
+        u8 port_id = (u8)(lr_evt_status_phyid_portid & 0x0000000F);
         u8 phy_id =
                 (u8)((lr_evt_status_phyid_portid & 0x000000F0) >> 4);
+        u32 npip_portstate = le32_to_cpu(pPayload->npip_portstate);
+        u8 portstate = (u8)(npip_portstate & 0x0000000F);
+        struct pm8001_port *port = &pm8001_ha->port[port_id];
         struct sas_ha_struct *sas_ha = pm8001_ha->sas;
         struct pm8001_phy *phy = &pm8001_ha->phy[phy_id];
         unsigned long flags;
         u8 deviceType = pPayload->sas_identify.dev_type;
-
+        port->port_state =  portstate;
         PM8001_MSG_DBG(pm8001_ha,
                 pm8001_printk("HW_EVENT_SAS_PHY_UP \n"));
 
@@ -2925,16 +2929,19 @@ hw_event_sas_phy_up(struct pm8001_hba_info *pm8001_ha, void *piomb)
                 PM8001_MSG_DBG(pm8001_ha, pm8001_printk("end device.\n"));
                 pm8001_chip_phy_ctl_req(pm8001_ha, phy_id,
                         PHY_NOTIFY_ENABLE_SPINUP);
+                port->port_attached = 1;
                 get_lrate_mode(phy, link_rate);
                 break;
         case SAS_EDGE_EXPANDER_DEVICE:
                 PM8001_MSG_DBG(pm8001_ha,
                         pm8001_printk("expander device.\n"));
+                port->port_attached = 1;
                 get_lrate_mode(phy, link_rate);
                 break;
         case SAS_FANOUT_EXPANDER_DEVICE:
                 PM8001_MSG_DBG(pm8001_ha,
                         pm8001_printk("fanout expander device.\n"));
+                port->port_attached = 1;
                 get_lrate_mode(phy, link_rate);
                 break;
         default:
@@ -2976,11 +2983,17 @@ hw_event_sata_phy_up(struct pm8001_hba_info *pm8001_ha, void *piomb)
                 le32_to_cpu(pPayload->lr_evt_status_phyid_portid);
         u8 link_rate =
                 (u8)((lr_evt_status_phyid_portid & 0xF0000000) >> 28);
+        u8 port_id = (u8)(lr_evt_status_phyid_portid & 0x0000000F);
         u8 phy_id =
                 (u8)((lr_evt_status_phyid_portid & 0x000000F0) >> 4);
+        u32 npip_portstate = le32_to_cpu(pPayload->npip_portstate);
+        u8 portstate = (u8)(npip_portstate & 0x0000000F);
+        struct pm8001_port *port = &pm8001_ha->port[port_id];
         struct sas_ha_struct *sas_ha = pm8001_ha->sas;
         struct pm8001_phy *phy = &pm8001_ha->phy[phy_id];
         unsigned long flags;
+        port->port_state =  portstate;
+        port->port_attached = 1;
         get_lrate_mode(phy, link_rate);
         phy->phy_type |= PORT_TYPE_SATA;
         phy->phy_attached = 1;
@@ -3014,7 +3027,13 @@ hw_event_phy_down(struct pm8001_hba_info *pm8001_ha, void *piomb)
                 (u8)((lr_evt_status_phyid_portid & 0x000000F0) >> 4);
         u32 npip_portstate = le32_to_cpu(pPayload->npip_portstate);
         u8 portstate = (u8)(npip_portstate & 0x0000000F);
-
+        struct pm8001_port *port = &pm8001_ha->port[port_id];
+        struct pm8001_phy *phy = &pm8001_ha->phy[phy_id];
+        port->port_state =  portstate;
+        phy->phy_type = 0;
+        phy->identify.device_type = 0;
+        phy->phy_attached = 0;
+        memset(&phy->dev_sas_addr, 0, SAS_ADDR_SIZE);
         switch (portstate) {
         case PORT_VALID:
                 break;
@@ -3023,26 +3042,30 @@ hw_event_phy_down(struct pm8001_hba_info *pm8001_ha, void *piomb)
                         pm8001_printk(" PortInvalid portID %d \n", port_id));
                 PM8001_MSG_DBG(pm8001_ha,
                         pm8001_printk(" Last phy Down and port invalid\n"));
+                port->port_attached = 0;
                 pm8001_hw_event_ack_req(pm8001_ha, 0, HW_EVENT_PHY_DOWN,
                         port_id, phy_id, 0, 0);
                 break;
         case PORT_IN_RESET:
                 PM8001_MSG_DBG(pm8001_ha,
-                        pm8001_printk(" PortInReset portID %d \n", port_id));
+                        pm8001_printk(" Port In Reset portID %d \n", port_id));
                 break;
         case PORT_NOT_ESTABLISHED:
                 PM8001_MSG_DBG(pm8001_ha,
                         pm8001_printk(" phy Down and PORT_NOT_ESTABLISHED\n"));
+                port->port_attached = 0;
                 break;
         case PORT_LOSTCOMM:
                 PM8001_MSG_DBG(pm8001_ha,
                         pm8001_printk(" phy Down and PORT_LOSTCOMM\n"));
                 PM8001_MSG_DBG(pm8001_ha,
                         pm8001_printk(" Last phy Down and port invalid\n"));
+                port->port_attached = 0;
                 pm8001_hw_event_ack_req(pm8001_ha, 0, HW_EVENT_PHY_DOWN,
                         port_id, phy_id, 0, 0);
                 break;
         default:
+                port->port_attached = 0;
                 PM8001_MSG_DBG(pm8001_ha,
                         pm8001_printk(" phy Down and(default) = %x\n",
                         portstate));
diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c
index 42ebe725d5a5..fb6379a4bee4 100644
--- a/drivers/scsi/pm8001/pm8001_init.c
+++ b/drivers/scsi/pm8001/pm8001_init.c
@@ -200,8 +200,13 @@ static int __devinit pm8001_alloc(struct pm8001_hba_info *pm8001_ha)
 {
         int i;
         spin_lock_init(&pm8001_ha->lock);
-        for (i = 0; i < pm8001_ha->chip->n_phy; i++)
+        for (i = 0; i < pm8001_ha->chip->n_phy; i++) {
                 pm8001_phy_init(pm8001_ha, i);
+                pm8001_ha->port[i].wide_port_phymap = 0;
+                pm8001_ha->port[i].port_attached = 0;
+                pm8001_ha->port[i].port_state = 0;
+                INIT_LIST_HEAD(&pm8001_ha->port[i].list);
+        }
 
         pm8001_ha->tags = kzalloc(PM8001_MAX_CCB, GFP_KERNEL);
         if (!pm8001_ha->tags)
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 1f767a0e727a..49721c886c26 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -329,6 +329,23 @@ int pm8001_slave_configure(struct scsi_device *sdev)
         }
         return 0;
 }
+ /* Find the local port id that's attached to this device */
+static int sas_find_local_port_id(struct domain_device *dev)
+{
+        struct domain_device *pdev = dev->parent;
+
+        /* Directly attached device */
+        if (!pdev)
+                return dev->port->id;
+        while (pdev) {
+                struct domain_device *pdev_p = pdev->parent;
+                if (!pdev_p)
+                        return pdev->port->id;
+                pdev = pdev->parent;
+        }
+        return 0;
+}
+
 /**
   * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
   * @task: the task to be execute.
@@ -346,11 +363,12 @@ static int pm8001_task_exec(struct sas_task *task, const int num,
         struct domain_device *dev = task->dev;
         struct pm8001_hba_info *pm8001_ha;
         struct pm8001_device *pm8001_dev;
+        struct pm8001_port *port = NULL;
         struct sas_task *t = task;
         struct pm8001_ccb_info *ccb;
         u32 tag = 0xdeadbeef, rc, n_elem = 0;
         u32 n = num;
-        unsigned long flags = 0;
+        unsigned long flags = 0, flags_libsas = 0;
 
         if (!dev->port) {
                 struct task_status_struct *tsm = &t->task_status;
@@ -379,6 +397,35 @@ static int pm8001_task_exec(struct sas_task *task, const int num,
                         rc = SAS_PHY_DOWN;
                         goto out_done;
                 }
+                port = &pm8001_ha->port[sas_find_local_port_id(dev)];
+                if (!port->port_attached) {
+                        if (sas_protocol_ata(t->task_proto)) {
+                                struct task_status_struct *ts = &t->task_status;
+                                ts->resp = SAS_TASK_UNDELIVERED;
+                                ts->stat = SAS_PHY_DOWN;
+
+                                spin_unlock_irqrestore(&pm8001_ha->lock, flags);
+                                spin_unlock_irqrestore(dev->sata_dev.ap->lock,
+                                                flags_libsas);
+                                t->task_done(t);
+                                spin_lock_irqsave(dev->sata_dev.ap->lock,
+                                        flags_libsas);
+                                spin_lock_irqsave(&pm8001_ha->lock, flags);
+                                if (n > 1)
+                                        t = list_entry(t->list.next,
+                                                        struct sas_task, list);
+                                continue;
+                        } else {
+                                struct task_status_struct *ts = &t->task_status;
+                                ts->resp = SAS_TASK_UNDELIVERED;
+                                ts->stat = SAS_PHY_DOWN;
+                                t->task_done(t);
+                                if (n > 1)
+                                        t = list_entry(t->list.next,
+                                                        struct sas_task, list);
+                                continue;
+                        }
+                }
                 rc = pm8001_tag_alloc(pm8001_ha, &tag);
                 if (rc)
                         goto err_out;
diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h
index 30f2ede55a75..c44a1150d70d 100644
--- a/drivers/scsi/pm8001/pm8001_sas.h
+++ b/drivers/scsi/pm8001/pm8001_sas.h
@@ -164,6 +164,10 @@ struct pm8001_chip_info {
 
 struct pm8001_port {
         struct asd_sas_port     sas_port;
+        u8                      port_attached;
+        u8                      wide_port_phymap;
+        u8                      port_state;
+        struct list_head        list;
 };
 
 struct pm8001_phy {