[SCSI] mpt fusion: Link speed change display support

When there is state change in FC links, a message is displayed with
old and new link speed.

signed-off-by: Sathya Prakash <sathya.prakash@lsi.com>
Acked-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 68 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index 04ef0a37a764..1197eba45bf5 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -698,6 +698,8 @@ typedef struct _MPT_ADAPTER
 
         struct work_struct       fc_setup_reset_work;
         struct list_head         fc_rports;
+        struct work_struct       fc_lsc_work;
+        u8                       fc_link_speed[2];
         spinlock_t               fc_rescan_work_lock;
         struct work_struct       fc_rescan_work;
         char                     fc_rescan_work_q_name[KOBJ_NAME_LEN];
diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c
index 2b3e27a58035..aadb0711cb61 100644
--- a/drivers/message/fusion/mptfc.c
+++ b/drivers/message/fusion/mptfc.c
@@ -675,6 +675,50 @@ mptfc_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
 }
 
 /*
+ *      mptfc_display_port_link_speed - displaying link speed
+ *      @ioc: Pointer to MPT_ADAPTER structure
+ *      @portnum: IOC Port number
+ *      @pp0dest: port page0 data payload
+ *
+ */
+static void
+mptfc_display_port_link_speed(MPT_ADAPTER *ioc, int portnum, FCPortPage0_t *pp0dest)
+{
+        u8      old_speed, new_speed, state;
+        char    *old, *new;
+
+        if (portnum >= 2)
+                return;
+
+        old_speed = ioc->fc_link_speed[portnum];
+        new_speed = pp0dest->CurrentSpeed;
+        state = pp0dest->PortState;
+
+        if (state != MPI_FCPORTPAGE0_PORTSTATE_OFFLINE &&
+            new_speed != MPI_FCPORTPAGE0_CURRENT_SPEED_UKNOWN) {
+
+                old = old_speed == MPI_FCPORTPAGE0_CURRENT_SPEED_1GBIT ? "1 Gbps" :
+                       old_speed == MPI_FCPORTPAGE0_CURRENT_SPEED_2GBIT ? "2 Gbps" :
+                        old_speed == MPI_FCPORTPAGE0_CURRENT_SPEED_4GBIT ? "4 Gbps" :
+                         "Unknown";
+                new = new_speed == MPI_FCPORTPAGE0_CURRENT_SPEED_1GBIT ? "1 Gbps" :
+                       new_speed == MPI_FCPORTPAGE0_CURRENT_SPEED_2GBIT ? "2 Gbps" :
+                        new_speed == MPI_FCPORTPAGE0_CURRENT_SPEED_4GBIT ? "4 Gbps" :
+                         "Unknown";
+                if (old_speed == 0)
+                        printk(MYIOC_s_NOTE_FMT
+                                "FC Link Established, Speed = %s\n",
+                                ioc->name, new);
+                else if (old_speed != new_speed)
+                        printk(MYIOC_s_WARN_FMT
+                                "FC Link Speed Change, Old Speed = %s, New Speed = %s\n",
+                                ioc->name, old, new);
+
+                ioc->fc_link_speed[portnum] = new_speed;
+        }
+}
+
+/*
  *      mptfc_GetFcPortPage0 - Fetch FCPort config Page0.
  *      @ioc: Pointer to MPT_ADAPTER structure
  *      @portnum: IOC Port number
@@ -773,6 +817,7 @@ mptfc_GetFcPortPage0(MPT_ADAPTER *ioc, int portnum)
                                                         " complete.\n",
                                                 ioc->name);
                         }
+                        mptfc_display_port_link_speed(ioc, portnum, pp0dest);
                 }
 
                 pci_free_consistent(ioc->pcidev, data_sz, (u8 *) ppage0_alloc, page0_dma);
@@ -1023,6 +1068,18 @@ mptfc_init_host_attr(MPT_ADAPTER *ioc,int portnum)
 }
 
 static void
+mptfc_link_status_change(struct work_struct *work)
+{
+        MPT_ADAPTER             *ioc =
+                container_of(work, MPT_ADAPTER, fc_rescan_work);
+        int ii;
+
+        for (ii=0; ii < ioc->facts.NumberOfPorts; ii++)
+                (void) mptfc_GetFcPortPage0(ioc, ii);
+
+}
+
+static void
 mptfc_setup_reset(struct work_struct *work)
 {
         MPT_ADAPTER             *ioc =
@@ -1163,6 +1220,7 @@ mptfc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         spin_lock_init(&ioc->fc_rescan_work_lock);
         INIT_WORK(&ioc->fc_rescan_work, mptfc_rescan_devices);
         INIT_WORK(&ioc->fc_setup_reset_work, mptfc_setup_reset);
+        INIT_WORK(&ioc->fc_lsc_work, mptfc_link_status_change);
 
         spin_lock_irqsave(&ioc->FreeQlock, flags);
 
@@ -1337,6 +1395,14 @@ mptfc_event_process(MPT_ADAPTER *ioc, EventNotificationReply_t *pEvReply)
                 }
                 spin_unlock_irqrestore(&ioc->fc_rescan_work_lock, flags);
                 break;
+        case MPI_EVENT_LINK_STATUS_CHANGE:
+                spin_lock_irqsave(&ioc->fc_rescan_work_lock, flags);
+                if (ioc->fc_rescan_work_q) {
+                        queue_work(ioc->fc_rescan_work_q,
+                                   &ioc->fc_lsc_work);
+                }
+                spin_unlock_irqrestore(&ioc->fc_rescan_work_lock, flags);
+                break;
         default:
                 rc = mptscsih_event_process(ioc,pEvReply);
                 break;