[SCSI] lpfc 8.3.14: PCI fixes and enhancements

- Allow enabling MSI-X intterupts with fewer vectors than requested
  by looking at the return value from pci_enable_msix.
- Implemented driver PCI AER error handling routines for supporting
  AER error recovering on SLI4 devices.
- Remove redundant SLI_ACTIVE checks
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/lpfc/lpfc_attr.c

@@ -864,7 +864,6 @@ lpfc_get_hba_info(struct lpfc_hba *phba,
 		  uint32_t *mrpi, uint32_t *arpi,
 		  uint32_t *mvpi, uint32_t *avpi)
 {
-	struct lpfc_sli *psli = &phba->sli;
 	struct lpfc_mbx_read_config *rd_config;
 	LPFC_MBOXQ_t *pmboxq;
 	MAILBOX_t *pmb;
@@ -893,8 +892,7 @@ lpfc_get_hba_info(struct lpfc_hba *phba,
 	pmb->mbxOwner = OWN_HOST;
 	pmboxq->context1 = NULL;
 
-	if ((phba->pport->fc_flag & FC_OFFLINE_MODE) ||
-		(!(psli->sli_flag & LPFC_SLI_ACTIVE)))
+	if (phba->pport->fc_flag & FC_OFFLINE_MODE)
 		rc = MBX_NOT_FINISHED;
 	else
 		rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);
@@ -2943,9 +2941,6 @@ lpfc_aer_support_store(struct device *dev, struct device_attribute *attr,
 	struct lpfc_hba *phba = vport->phba;
 	int val = 0, rc = -EINVAL;
 
-	/* AER not supported on OC devices yet */
-	if (phba->pci_dev_grp == LPFC_PCI_DEV_OC)
-		return -EPERM;
 	if (!isdigit(buf[0]))
 		return -EINVAL;
 	if (sscanf(buf, "%i", &val) != 1)
@@ -3018,12 +3013,6 @@ lpfc_param_show(aer_support)
 static int
 lpfc_aer_support_init(struct lpfc_hba *phba, int val)
 {
-	/* AER not supported on OC devices yet */
-	if (phba->pci_dev_grp == LPFC_PCI_DEV_OC) {
-		phba->cfg_aer_support = 0;
-		return -EPERM;
-	}
-
 	if (val == 0 || val == 1) {
 		phba->cfg_aer_support = val;
 		return 0;
@@ -3068,9 +3057,6 @@ lpfc_aer_cleanup_state(struct device *dev, struct device_attribute *attr,
 	struct lpfc_hba   *phba = vport->phba;
 	int val, rc = -1;
 
-	/* AER not supported on OC devices yet */
-	if (phba->pci_dev_grp == LPFC_PCI_DEV_OC)
-		return -EPERM;
 	if (!isdigit(buf[0]))
 		return -EINVAL;
 	if (sscanf(buf, "%i", &val) != 1)
@@ -4099,8 +4085,7 @@ lpfc_get_stats(struct Scsi_Host *shost)
 	pmboxq->context1 = NULL;
 	pmboxq->vport = vport;
 
-	if ((vport->fc_flag & FC_OFFLINE_MODE) ||
-		(!(psli->sli_flag & LPFC_SLI_ACTIVE)))
+	if (vport->fc_flag & FC_OFFLINE_MODE)
 		rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
 	else
 		rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);
@@ -4124,8 +4109,7 @@ lpfc_get_stats(struct Scsi_Host *shost)
 	pmboxq->context1 = NULL;
 	pmboxq->vport = vport;
 
-	if ((vport->fc_flag & FC_OFFLINE_MODE) ||
-	    (!(psli->sli_flag & LPFC_SLI_ACTIVE)))
+	if (vport->fc_flag & FC_OFFLINE_MODE)
 		rc = lpfc_sli_issue_mbox(phba, pmboxq, MBX_POLL);
 	else
 		rc = lpfc_sli_issue_mbox_wait(phba, pmboxq, phba->fc_ratov * 2);

drivers/scsi/lpfc/lpfc_scsi.c

@@ -2295,15 +2295,21 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 	struct lpfc_vport      *vport = pIocbIn->vport;
 	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
 	struct lpfc_nodelist *pnode = rdata->pnode;
-	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
+	struct scsi_cmnd *cmd;
 	int result;
 	struct scsi_device *tmp_sdev;
 	int depth;
 	unsigned long flags;
 	struct lpfc_fast_path_event *fast_path_evt;
-	struct Scsi_Host *shost = cmd->device->host;
+	struct Scsi_Host *shost;
 	uint32_t queue_depth, scsi_id;
 
+	/* Sanity check on return of outstanding command */
+	if (!(lpfc_cmd->pCmd))
+		return;
+	cmd = lpfc_cmd->pCmd;
+	shost = cmd->device->host;
+
 	lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
 	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
 	/* pick up SLI4 exhange busy status from HBA */

drivers/scsi/lpfc/lpfc_sli.c

@@ -3593,13 +3593,16 @@ static int
 lpfc_sli_brdrestart_s4(struct lpfc_hba *phba)
 {
 	struct lpfc_sli *psli = &phba->sli;
-
+	uint32_t hba_aer_enabled;
 
 	/* Restart HBA */
 	lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
 			"0296 Restart HBA Data: x%x x%x\n",
 			phba->pport->port_state, psli->sli_flag);
 
+	/* Take PCIe device Advanced Error Reporting (AER) state */
+	hba_aer_enabled = phba->hba_flag & HBA_AER_ENABLED;
+
 	lpfc_sli4_brdreset(phba);
 
 	spin_lock_irq(&phba->hbalock);
@@ -3611,6 +3614,10 @@ lpfc_sli_brdrestart_s4(struct lpfc_hba *phba)
 	memset(&psli->lnk_stat_offsets, 0, sizeof(psli->lnk_stat_offsets));
 	psli->stats_start = get_seconds();
 
+	/* Reset HBA AER if it was enabled, note hba_flag was reset above */
+	if (hba_aer_enabled)
+		pci_disable_pcie_error_reporting(phba->pcidev);
+
 	lpfc_hba_down_post(phba);
 
 	return 0;
@@ -4554,6 +4561,24 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 	/* Start error attention (ERATT) polling timer */
 	mod_timer(&phba->eratt_poll, jiffies + HZ * LPFC_ERATT_POLL_INTERVAL);
 
+	/* Enable PCIe device Advanced Error Reporting (AER) if configured */
+	if (phba->cfg_aer_support == 1 && !(phba->hba_flag & HBA_AER_ENABLED)) {
+		rc = pci_enable_pcie_error_reporting(phba->pcidev);
+		if (!rc) {
+			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+					"2829 This device supports "
+					"Advanced Error Reporting (AER)\n");
+			spin_lock_irq(&phba->hbalock);
+			phba->hba_flag |= HBA_AER_ENABLED;
+			spin_unlock_irq(&phba->hbalock);
+		} else {
+			lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+					"2830 This device does not support "
+					"Advanced Error Reporting (AER)\n");
+			phba->cfg_aer_support = 0;
+		}
+	}
+
 	/*
 	 * The port is ready, set the host's link state to LINK_DOWN
 	 * in preparation for link interrupts.
@@ -9089,9 +9114,10 @@ lpfc_sli4_sp_handle_eqe(struct lpfc_hba *phba, struct lpfc_eqe *eqe)
 		}
 	}
 	if (unlikely(!cq)) {
+		if (phba->sli.sli_flag & LPFC_SLI_ACTIVE)
 			lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
-				"0365 Slow-path CQ identifier (%d) does "
-				"not exist\n", cqid);
+					"0365 Slow-path CQ identifier "
+					"(%d) does not exist\n", cqid);
 		return;
 	}
 
@@ -9321,9 +9347,10 @@ lpfc_sli4_fp_handle_eqe(struct lpfc_hba *phba, struct lpfc_eqe *eqe,
 
 	cq = phba->sli4_hba.fcp_cq[fcp_cqidx];
 	if (unlikely(!cq)) {
+		if (phba->sli.sli_flag & LPFC_SLI_ACTIVE)
 			lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
-				"0367 Fast-path completion queue does not "
-				"exist\n");
+					"0367 Fast-path completion queue "
+					"does not exist\n");
 		return;
 	}
 

drivers/scsi/lpfc/lpfc_sli4.h

@@ -382,6 +382,7 @@ struct lpfc_sli4_hba {
 	struct lpfc_pc_sli4_params pc_sli4_params;
 	struct msix_entry *msix_entries;
 	uint32_t cfg_eqn;
+	uint32_t msix_vec_nr;
 	struct lpfc_fcp_eq_hdl *fcp_eq_hdl; /* FCP per-WQ handle */
 	/* Pointers to the constructed SLI4 queues */
 	struct lpfc_queue **fp_eq; /* Fast-path event queue */