1 files changed, 229 insertions, 49 deletions

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index d29ac7c317d9..774663e8e1fe 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -29,6 +29,7 @@
 #include <linux/spinlock.h>
 #include <linux/ctype.h>
 #include <linux/aer.h>
+#include <linux/slab.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_device.h>
@@ -350,7 +351,12 @@ lpfc_config_port_post(struct lpfc_hba *phba)
         mb = &pmb->u.mb;
 
         /* Get login parameters for NID.  */
-        lpfc_read_sparam(phba, pmb, 0);
+        rc = lpfc_read_sparam(phba, pmb, 0);
+        if (rc) {
+                mempool_free(pmb, phba->mbox_mem_pool);
+                return -ENOMEM;
+        }
+
         pmb->vport = vport;
         if (lpfc_sli_issue_mbox(phba, pmb, MBX_POLL) != MBX_SUCCESS) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
@@ -359,7 +365,7 @@ lpfc_config_port_post(struct lpfc_hba *phba)
                                 mb->mbxCommand, mb->mbxStatus);
                 phba->link_state = LPFC_HBA_ERROR;
                 mp = (struct lpfc_dmabuf *) pmb->context1;
-                mempool_free( pmb, phba->mbox_mem_pool);
+                mempool_free(pmb, phba->mbox_mem_pool);
                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
                 kfree(mp);
                 return -EIO;
@@ -544,7 +550,7 @@ lpfc_config_port_post(struct lpfc_hba *phba)
                         mempool_free(pmb, phba->mbox_mem_pool);
                         return -EIO;
                 }
-        } else if (phba->cfg_suppress_link_up == 0) {
+        } else if (phba->cfg_suppress_link_up == LPFC_INITIALIZE_LINK) {
                 lpfc_init_link(phba, pmb, phba->cfg_topology,
                         phba->cfg_link_speed);
                 pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
@@ -571,6 +577,11 @@ lpfc_config_port_post(struct lpfc_hba *phba)
         }
         /* MBOX buffer will be freed in mbox compl */
         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+        if (!pmb) {
+                phba->link_state = LPFC_HBA_ERROR;
+                return -ENOMEM;
+        }
+
         lpfc_config_async(phba, pmb, LPFC_ELS_RING);
         pmb->mbox_cmpl = lpfc_config_async_cmpl;
         pmb->vport = phba->pport;
@@ -588,6 +599,11 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 
         /* Get Option rom version */
         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+        if (!pmb) {
+                phba->link_state = LPFC_HBA_ERROR;
+                return -ENOMEM;
+        }
+
         lpfc_dump_wakeup_param(phba, pmb);
         pmb->mbox_cmpl = lpfc_dump_wakeup_param_cmpl;
         pmb->vport = phba->pport;
@@ -652,7 +668,7 @@ lpfc_hba_init_link(struct lpfc_hba *phba)
                         mempool_free(pmb, phba->mbox_mem_pool);
                 return -EIO;
         }
-        phba->cfg_suppress_link_up = 0;
+        phba->cfg_suppress_link_up = LPFC_INITIALIZE_LINK;
 
         return 0;
 }
@@ -807,6 +823,8 @@ lpfc_hba_down_post_s4(struct lpfc_hba *phba)
         LIST_HEAD(aborts);
         int ret;
         unsigned long iflag = 0;
+        struct lpfc_sglq *sglq_entry = NULL;
+
         ret = lpfc_hba_down_post_s3(phba);
         if (ret)
                 return ret;
@@ -822,6 +840,10 @@ lpfc_hba_down_post_s4(struct lpfc_hba *phba)
          * list.
          */
         spin_lock(&phba->sli4_hba.abts_sgl_list_lock);
+        list_for_each_entry(sglq_entry,
+                &phba->sli4_hba.lpfc_abts_els_sgl_list, list)
+                sglq_entry->state = SGL_FREED;
+
         list_splice_init(&phba->sli4_hba.lpfc_abts_els_sgl_list,
                         &phba->sli4_hba.lpfc_sgl_list);
         spin_unlock(&phba->sli4_hba.abts_sgl_list_lock);
@@ -2178,8 +2200,10 @@ lpfc_stop_vport_timers(struct lpfc_vport *vport)
 void
 __lpfc_sli4_stop_fcf_redisc_wait_timer(struct lpfc_hba *phba)
 {
-        /* Clear pending FCF rediscovery wait timer */
-        phba->fcf.fcf_flag &= ~FCF_REDISC_PEND;
+        /* Clear pending FCF rediscovery wait and failover in progress flags */
+        phba->fcf.fcf_flag &= ~(FCF_REDISC_PEND |
+                                FCF_DEAD_DISC |
+                                FCF_ACVL_DISC);
         /* Now, try to stop the timer */
         del_timer(&phba->fcf.redisc_wait);
 }
@@ -2576,6 +2600,14 @@ lpfc_create_port(struct lpfc_hba *phba, int instance, struct device *dev)
         init_timer(&vport->els_tmofunc);
         vport->els_tmofunc.function = lpfc_els_timeout;
         vport->els_tmofunc.data = (unsigned long)vport;
+        if (phba->pcidev->device == PCI_DEVICE_ID_HORNET) {
+                phba->menlo_flag |= HBA_MENLO_SUPPORT;
+                /* check for menlo minimum sg count */
+                if (phba->cfg_sg_seg_cnt < LPFC_DEFAULT_MENLO_SG_SEG_CNT) {
+                        phba->cfg_sg_seg_cnt = LPFC_DEFAULT_MENLO_SG_SEG_CNT;
+                        shost->sg_tablesize = phba->cfg_sg_seg_cnt;
+                }
+        }
 
         error = scsi_add_host_with_dma(shost, dev, &phba->pcidev->dev);
         if (error)
@@ -2912,6 +2944,9 @@ lpfc_sli4_fcf_redisc_wait_tmo(unsigned long ptr)
         /* FCF rediscovery event to worker thread */
         phba->fcf.fcf_flag |= FCF_REDISC_EVT;
         spin_unlock_irq(&phba->hbalock);
+        lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
+                        "2776 FCF rediscover wait timer expired, post "
+                        "a worker thread event for FCF table scan\n");
         /* wake up worker thread */
         lpfc_worker_wake_up(phba);
 }
@@ -3183,6 +3218,68 @@ out_free_pmb:
 }
 
 /**
+ * lpfc_sli4_perform_vport_cvl - Perform clear virtual link on a vport
+ * @vport: pointer to vport data structure.
+ *
+ * This routine is to perform Clear Virtual Link (CVL) on a vport in
+ * response to a CVL event.
+ *
+ * Return the pointer to the ndlp with the vport if successful, otherwise
+ * return NULL.
+ **/
+static struct lpfc_nodelist *
+lpfc_sli4_perform_vport_cvl(struct lpfc_vport *vport)
+{
+        struct lpfc_nodelist *ndlp;
+        struct Scsi_Host *shost;
+        struct lpfc_hba *phba;
+
+        if (!vport)
+                return NULL;
+        ndlp = lpfc_findnode_did(vport, Fabric_DID);
+        if (!ndlp)
+                return NULL;
+        phba = vport->phba;
+        if (!phba)
+                return NULL;
+        if (phba->pport->port_state <= LPFC_FLOGI)
+                return NULL;
+        /* If virtual link is not yet instantiated ignore CVL */
+        if (vport->port_state <= LPFC_FDISC)
+                return NULL;
+        shost = lpfc_shost_from_vport(vport);
+        if (!shost)
+                return NULL;
+        lpfc_linkdown_port(vport);
+        lpfc_cleanup_pending_mbox(vport);
+        spin_lock_irq(shost->host_lock);
+        vport->fc_flag |= FC_VPORT_CVL_RCVD;
+        spin_unlock_irq(shost->host_lock);
+
+        return ndlp;
+}
+
+/**
+ * lpfc_sli4_perform_all_vport_cvl - Perform clear virtual link on all vports
+ * @vport: pointer to lpfc hba data structure.
+ *
+ * This routine is to perform Clear Virtual Link (CVL) on all vports in
+ * response to a FCF dead event.
+ **/
+static void
+lpfc_sli4_perform_all_vport_cvl(struct lpfc_hba *phba)
+{
+        struct lpfc_vport **vports;
+        int i;
+
+        vports = lpfc_create_vport_work_array(phba);
+        if (vports)
+                for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
+                        lpfc_sli4_perform_vport_cvl(vports[i]);
+        lpfc_destroy_vport_work_array(phba, vports);
+}
+
+/**
  * lpfc_sli4_async_fcoe_evt - Process the asynchronous fcoe event
  * @phba: pointer to lpfc hba data structure.
  * @acqe_link: pointer to the async fcoe completion queue entry.
@@ -3198,7 +3295,6 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
         struct lpfc_vport *vport;
         struct lpfc_nodelist *ndlp;
         struct Scsi_Host  *shost;
-        uint32_t link_state;
         int active_vlink_present;
         struct lpfc_vport **vports;
         int i;
@@ -3208,10 +3304,11 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
         switch (event_type) {
         case LPFC_FCOE_EVENT_TYPE_NEW_FCF:
         case LPFC_FCOE_EVENT_TYPE_FCF_PARAM_MOD:
-                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
-                        "2546 New FCF found index 0x%x tag 0x%x\n",
-                        acqe_fcoe->index,
-                        acqe_fcoe->event_tag);
+                lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
+                        "2546 New FCF found/FCF parameter modified event: "
+                        "evt_tag:x%x, fcf_index:x%x\n",
+                        acqe_fcoe->event_tag, acqe_fcoe->index);
+
                 spin_lock_irq(&phba->hbalock);
                 if ((phba->fcf.fcf_flag & FCF_SCAN_DONE) ||
                     (phba->hba_flag & FCF_DISC_INPROGRESS)) {
@@ -3222,6 +3319,7 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                         spin_unlock_irq(&phba->hbalock);
                         break;
                 }
+
                 if (phba->fcf.fcf_flag & FCF_REDISC_EVT) {
                         /*
                          * If fast FCF failover rescan event is pending,
@@ -3232,12 +3330,33 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                 }
                 spin_unlock_irq(&phba->hbalock);
 
-                /* Read the FCF table and re-discover SAN. */
-                rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
+                if ((phba->fcf.fcf_flag & FCF_DISCOVERY) &&
+                    !(phba->fcf.fcf_flag & FCF_REDISC_FOV)) {
+                        /*
+                         * During period of FCF discovery, read the FCF
+                         * table record indexed by the event to update
+                         * FCF round robin failover eligible FCF bmask.
+                         */
+                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP |
+                                        LOG_DISCOVERY,
+                                        "2779 Read new FCF record with "
+                                        "fcf_index:x%x for updating FCF "
+                                        "round robin failover bmask\n",
+                                        acqe_fcoe->index);
+                        rc = lpfc_sli4_read_fcf_rec(phba, acqe_fcoe->index);
+                }
+
+                /* Otherwise, scan the entire FCF table and re-discover SAN */
+                lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
+                                "2770 Start FCF table scan due to new FCF "
+                                "event: evt_tag:x%x, fcf_index:x%x\n",
+                                acqe_fcoe->event_tag, acqe_fcoe->index);
+                rc = lpfc_sli4_fcf_scan_read_fcf_rec(phba,
+                                                     LPFC_FCOE_FCF_GET_FIRST);
                 if (rc)
-                        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
-                                        "2547 Read FCF record failed 0x%x\n",
-                                        rc);
+                        lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
+                                        "2547 Issue FCF scan read FCF mailbox "
+                                        "command failed 0x%x\n", rc);
                 break;
 
         case LPFC_FCOE_EVENT_TYPE_FCF_TABLE_FULL:
@@ -3248,47 +3367,63 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                 break;
 
         case LPFC_FCOE_EVENT_TYPE_FCF_DEAD:
-                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
+                lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
                         "2549 FCF disconnected from network index 0x%x"
                         " tag 0x%x\n", acqe_fcoe->index,
                         acqe_fcoe->event_tag);
                 /* If the event is not for currently used fcf do nothing */
                 if (phba->fcf.current_rec.fcf_indx != acqe_fcoe->index)
                         break;
-                /*
-                 * Currently, driver support only one FCF - so treat this as
-                 * a link down, but save the link state because we don't want
-                 * it to be changed to Link Down unless it is already down.
+                /* We request port to rediscover the entire FCF table for
+                 * a fast recovery from case that the current FCF record
+                 * is no longer valid if we are not in the middle of FCF
+                 * failover process already.
                  */
-                link_state = phba->link_state;
-                lpfc_linkdown(phba);
-                phba->link_state = link_state;
-                /* Unregister FCF if no devices connected to it */
-                lpfc_unregister_unused_fcf(phba);
+                spin_lock_irq(&phba->hbalock);
+                if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
+                        spin_unlock_irq(&phba->hbalock);
+                        /* Update FLOGI FCF failover eligible FCF bmask */
+                        lpfc_sli4_fcf_rr_index_clear(phba, acqe_fcoe->index);
+                        break;
+                }
+                /* Mark the fast failover process in progress */
+                phba->fcf.fcf_flag |= FCF_DEAD_DISC;
+                spin_unlock_irq(&phba->hbalock);
+                lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
+                                "2771 Start FCF fast failover process due to "
+                                "FCF DEAD event: evt_tag:x%x, fcf_index:x%x "
+                                "\n", acqe_fcoe->event_tag, acqe_fcoe->index);
+                rc = lpfc_sli4_redisc_fcf_table(phba);
+                if (rc) {
+                        lpfc_printf_log(phba, KERN_ERR, LOG_FIP |
+                                        LOG_DISCOVERY,
+                                        "2772 Issue FCF rediscover mabilbox "
+                                        "command failed, fail through to FCF "
+                                        "dead event\n");
+                        spin_lock_irq(&phba->hbalock);
+                        phba->fcf.fcf_flag &= ~FCF_DEAD_DISC;
+                        spin_unlock_irq(&phba->hbalock);
+                        /*
+                         * Last resort will fail over by treating this
+                         * as a link down to FCF registration.
+                         */
+                        lpfc_sli4_fcf_dead_failthrough(phba);
+                } else
+                        /* Handling fast FCF failover to a DEAD FCF event
+                         * is considered equalivant to receiving CVL to all
+                         * vports.
+                         */
+                        lpfc_sli4_perform_all_vport_cvl(phba);
                 break;
         case LPFC_FCOE_EVENT_TYPE_CVL:
-                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
+                lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
                         "2718 Clear Virtual Link Received for VPI 0x%x"
                         " tag 0x%x\n", acqe_fcoe->index, acqe_fcoe->event_tag);
                 vport = lpfc_find_vport_by_vpid(phba,
                                 acqe_fcoe->index - phba->vpi_base);
-                if (!vport)
-                        break;
-                ndlp = lpfc_findnode_did(vport, Fabric_DID);
+                ndlp = lpfc_sli4_perform_vport_cvl(vport);
                 if (!ndlp)
                         break;
-                shost = lpfc_shost_from_vport(vport);
-                if (phba->pport->port_state <= LPFC_FLOGI)
-                        break;
-                /* If virtual link is not yet instantiated ignore CVL */
-                if (vport->port_state <= LPFC_FDISC)
-                        break;
-
-                lpfc_linkdown_port(vport);
-                lpfc_cleanup_pending_mbox(vport);
-                spin_lock_irq(shost->host_lock);
-                vport->fc_flag |= FC_VPORT_CVL_RCVD;
-                spin_unlock_irq(shost->host_lock);
                 active_vlink_present = 0;
 
                 vports = lpfc_create_vport_work_array(phba);
@@ -3311,6 +3446,7 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                          * re-instantiate the Vlink using FDISC.
                          */
                         mod_timer(&ndlp->nlp_delayfunc, jiffies + HZ);
+                        shost = lpfc_shost_from_vport(vport);
                         spin_lock_irq(shost->host_lock);
                         ndlp->nlp_flag |= NLP_DELAY_TMO;
                         spin_unlock_irq(shost->host_lock);
@@ -3321,15 +3457,38 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
                          * Otherwise, we request port to rediscover
                          * the entire FCF table for a fast recovery
                          * from possible case that the current FCF
-                         * is no longer valid.
+                         * is no longer valid if we are not already
+                         * in the FCF failover process.
                          */
+                        spin_lock_irq(&phba->hbalock);
+                        if (phba->fcf.fcf_flag & FCF_DISCOVERY) {
+                                spin_unlock_irq(&phba->hbalock);
+                                break;
+                        }
+                        /* Mark the fast failover process in progress */
+                        phba->fcf.fcf_flag |= FCF_ACVL_DISC;
+                        spin_unlock_irq(&phba->hbalock);
+                        lpfc_printf_log(phba, KERN_INFO, LOG_FIP |
+                                        LOG_DISCOVERY,
+                                        "2773 Start FCF fast failover due "
+                                        "to CVL event: evt_tag:x%x\n",
+                                        acqe_fcoe->event_tag);
                         rc = lpfc_sli4_redisc_fcf_table(phba);
-                        if (rc)
+                        if (rc) {
+                                lpfc_printf_log(phba, KERN_ERR, LOG_FIP |
+                                                LOG_DISCOVERY,
+                                                "2774 Issue FCF rediscover "
+                                                "mabilbox command failed, "
+                                                "through to CVL event\n");
+                                spin_lock_irq(&phba->hbalock);
+                                phba->fcf.fcf_flag &= ~FCF_ACVL_DISC;
+                                spin_unlock_irq(&phba->hbalock);
                                 /*
                                  * Last resort will be re-try on the
                                  * the current registered FCF entry.
                                  */
                                 lpfc_retry_pport_discovery(phba);
+                        }
                 }
                 break;
         default:
@@ -3426,11 +3585,14 @@ void lpfc_sli4_fcf_redisc_event_proc(struct lpfc_hba *phba)
         spin_unlock_irq(&phba->hbalock);
 
         /* Scan FCF table from the first entry to re-discover SAN */
-        rc = lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
+        lpfc_printf_log(phba, KERN_INFO, LOG_FIP | LOG_DISCOVERY,
+                        "2777 Start FCF table scan after FCF "
+                        "rediscovery quiescent period over\n");
+        rc = lpfc_sli4_fcf_scan_read_fcf_rec(phba, LPFC_FCOE_FCF_GET_FIRST);
         if (rc)
-                lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
-                                "2747 Post FCF rediscovery read FCF record "
-                                "failed 0x%x\n", rc);
+                lpfc_printf_log(phba, KERN_ERR, LOG_FIP | LOG_DISCOVERY,
+                                "2747 Issue FCF scan read FCF mailbox "
+                                "command failed 0x%x\n", rc);
 }
 
 /**
@@ -3722,6 +3884,7 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
         int rc, i, hbq_count, buf_size, dma_buf_size, max_buf_size;
         uint8_t pn_page[LPFC_MAX_SUPPORTED_PAGES] = {0};
         struct lpfc_mqe *mqe;
+        int longs;
 
         /* Before proceed, wait for POST done and device ready */
         rc = lpfc_sli4_post_status_check(phba);
@@ -3898,13 +4061,24 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
                 goto out_free_active_sgl;
         }
 
+        /* Allocate eligible FCF bmask memory for FCF round robin failover */
+        longs = (LPFC_SLI4_FCF_TBL_INDX_MAX + BITS_PER_LONG - 1)/BITS_PER_LONG;
+        phba->fcf.fcf_rr_bmask = kzalloc(longs * sizeof(unsigned long),
+                                         GFP_KERNEL);
+        if (!phba->fcf.fcf_rr_bmask) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                                "2759 Failed allocate memory for FCF round "
+                                "robin failover bmask\n");
+                goto out_remove_rpi_hdrs;
+        }
+
         phba->sli4_hba.fcp_eq_hdl = kzalloc((sizeof(struct lpfc_fcp_eq_hdl) *
                                     phba->cfg_fcp_eq_count), GFP_KERNEL);
         if (!phba->sli4_hba.fcp_eq_hdl) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                 "2572 Failed allocate memory for fast-path "
                                 "per-EQ handle array\n");
-                goto out_remove_rpi_hdrs;
+                goto out_free_fcf_rr_bmask;
         }
 
         phba->sli4_hba.msix_entries = kzalloc((sizeof(struct msix_entry) *
@@ -3957,6 +4131,8 @@ lpfc_sli4_driver_resource_setup(struct lpfc_hba *phba)
 
 out_free_fcp_eq_hdl:
         kfree(phba->sli4_hba.fcp_eq_hdl);
+out_free_fcf_rr_bmask:
+        kfree(phba->fcf.fcf_rr_bmask);
 out_remove_rpi_hdrs:
         lpfc_sli4_remove_rpi_hdrs(phba);
 out_free_active_sgl:
@@ -4002,6 +4178,9 @@ lpfc_sli4_driver_resource_unset(struct lpfc_hba *phba)
         lpfc_sli4_remove_rpi_hdrs(phba);
         lpfc_sli4_remove_rpis(phba);
 
+        /* Free eligible FCF index bmask */
+        kfree(phba->fcf.fcf_rr_bmask);
+
         /* Free the ELS sgl list */
         lpfc_free_active_sgl(phba);
         lpfc_free_sgl_list(phba);
@@ -4397,6 +4576,7 @@ lpfc_init_sgl_list(struct lpfc_hba *phba)
 
                 /* The list order is used by later block SGL registraton */
                 spin_lock_irq(&phba->hbalock);
+                sglq_entry->state = SGL_FREED;
                 list_add_tail(&sglq_entry->list, &phba->sli4_hba.lpfc_sgl_list);
                 phba->sli4_hba.lpfc_els_sgl_array[i] = sglq_entry;
                 phba->sli4_hba.total_sglq_bufs++;