[SCSI] lpfc 8.3.28: Add support for ABTS failure handling

Add support for ABTS failure handling:

- Add asynchronous ABTS notification event feature to driver (CR 124578)
- Change driver message 3092 and 3116 to KERN_WARNING (CR 124768)
- Alter the SCR ELS command to use the temporary RPI and the
  Destination DID for SLI4-FC (CR 126070)

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 177 insertions, 37 deletions

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 4c4d77356bb2..97bbafb21bc2 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -4339,6 +4339,11 @@ lpfc_sli_config_port(struct lpfc_hba *phba, int sli_mode)
 			phba->sli.sli_flag &= ~LPFC_SLI_ASYNC_MBX_BLK;
 			spin_unlock_irq(&phba->hbalock);
 			done = 1;
+
+			if ((pmb->u.mb.un.varCfgPort.casabt == 1) &&
+			    (pmb->u.mb.un.varCfgPort.gasabt == 0))
+				lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
+					"3110 Port did not grant ASABT\n");
 		}
 	}
 	if (!done) {
@@ -7704,6 +7709,7 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
 					iocbq->context2)->virt);
 		if (phba->fc_topology == LPFC_TOPOLOGY_LOOP) {
 			if (pcmd && (*pcmd == ELS_CMD_FLOGI ||
+				*pcmd == ELS_CMD_SCR ||
 				*pcmd == ELS_CMD_PLOGI)) {
 				bf_set(els_req64_sp, &wqe->els_req, 1);
 				bf_set(els_req64_sid, &wqe->els_req,
@@ -8213,6 +8219,137 @@ lpfc_extra_ring_setup( struct lpfc_hba *phba)
 	return 0;
 }
 
+/* lpfc_sli_abts_recover_port - Recover a port that failed an ABTS.
+ * @vport: pointer to virtual port object.
+ * @ndlp: nodelist pointer for the impacted rport.
+ *
+ * The driver calls this routine in response to a XRI ABORT CQE
+ * event from the port.  In this event, the driver is required to
+ * recover its login to the rport even though its login may be valid
+ * from the driver's perspective.  The failed ABTS notice from the
+ * port indicates the rport is not responding.
+ */
+static void
+lpfc_sli_abts_recover_port(struct lpfc_vport *vport,
+			   struct lpfc_nodelist *ndlp)
+{
+	struct Scsi_Host *shost;
+	struct lpfc_hba *phba;
+	unsigned long flags = 0;
+
+	shost = lpfc_shost_from_vport(vport);
+	phba = vport->phba;
+	if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
+		lpfc_printf_log(phba, KERN_INFO,
+			LOG_SLI, "3093 No rport recovery needed. "
+			"rport in state 0x%x\n",
+			ndlp->nlp_state);
+		return;
+	}
+	lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
+			"3094 Start rport recovery on shost id 0x%x "
+			"fc_id 0x%06x vpi 0x%x rpi 0x%x state 0x%x "
+			"flags 0x%x\n",
+			shost->host_no, ndlp->nlp_DID,
+			vport->vpi, ndlp->nlp_rpi, ndlp->nlp_state,
+			ndlp->nlp_flag);
+	/*
+	 * The rport is not responding.  Don't attempt ADISC recovery.
+	 * Remove the FCP-2 flag to force a PLOGI.
+	 */
+	spin_lock_irqsave(shost->host_lock, flags);
+	ndlp->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	lpfc_disc_state_machine(vport, ndlp, NULL,
+				NLP_EVT_DEVICE_RECOVERY);
+	lpfc_cancel_retry_delay_tmo(vport, ndlp);
+	spin_lock_irqsave(shost->host_lock, flags);
+	ndlp->nlp_flag |= NLP_NPR_2B_DISC;
+	spin_unlock_irqrestore(shost->host_lock, flags);
+	lpfc_disc_start(vport);
+}
+
+/* lpfc_sli_abts_err_handler - handle a failed ABTS request from an SLI3 port.
+ * @phba: Pointer to HBA context object.
+ * @iocbq: Pointer to iocb object.
+ *
+ * The async_event handler calls this routine when it receives
+ * an ASYNC_STATUS_CN event from the port.  The port generates
+ * this event when an Abort Sequence request to an rport fails
+ * twice in succession.  The abort could be originated by the
+ * driver or by the port.  The ABTS could have been for an ELS
+ * or FCP IO.  The port only generates this event when an ABTS
+ * fails to complete after one retry.
+ */
+static void
+lpfc_sli_abts_err_handler(struct lpfc_hba *phba,
+			  struct lpfc_iocbq *iocbq)
+{
+	struct lpfc_nodelist *ndlp = NULL;
+	uint16_t rpi = 0, vpi = 0;
+	struct lpfc_vport *vport = NULL;
+
+	/* The rpi in the ulpContext is vport-sensitive. */
+	vpi = iocbq->iocb.un.asyncstat.sub_ctxt_tag;
+	rpi = iocbq->iocb.ulpContext;
+
+	lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
+			"3092 Port generated ABTS async event "
+			"on vpi %d rpi %d status 0x%x\n",
+			vpi, rpi, iocbq->iocb.ulpStatus);
+
+	vport = lpfc_find_vport_by_vpid(phba, vpi);
+	if (!vport)
+		goto err_exit;
+	ndlp = lpfc_findnode_rpi(vport, rpi);
+	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
+		goto err_exit;
+
+	if (iocbq->iocb.ulpStatus == IOSTAT_LOCAL_REJECT)
+		lpfc_sli_abts_recover_port(vport, ndlp);
+	return;
+
+ err_exit:
+	lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
+			"3095 Event Context not found, no "
+			"action on vpi %d rpi %d status 0x%x, reason 0x%x\n",
+			iocbq->iocb.ulpContext, iocbq->iocb.ulpStatus,
+			vpi, rpi);
+}
+
+/* lpfc_sli4_abts_err_handler - handle a failed ABTS request from an SLI4 port.
+ * @phba: pointer to HBA context object.
+ * @ndlp: nodelist pointer for the impacted rport.
+ * @axri: pointer to the wcqe containing the failed exchange.
+ *
+ * The driver calls this routine when it receives an ABORT_XRI_FCP CQE from the
+ * port.  The port generates this event when an abort exchange request to an
+ * rport fails twice in succession with no reply.  The abort could be originated
+ * by the driver or by the port.  The ABTS could have been for an ELS or FCP IO.
+ */
+void
+lpfc_sli4_abts_err_handler(struct lpfc_hba *phba,
+			   struct lpfc_nodelist *ndlp,
+			   struct sli4_wcqe_xri_aborted *axri)
+{
+	struct lpfc_vport *vport;
+
+	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp))
+		lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
+				"3115 Node Context not found, driver "
+				"ignoring abts err event\n");
+	vport = ndlp->vport;
+	lpfc_printf_log(phba, KERN_WARNING, LOG_SLI,
+			"3116 Port generated FCP XRI ABORT event on "
+			"vpi %d rpi %d xri x%x status 0x%x\n",
+			ndlp->vport->vpi, ndlp->nlp_rpi,
+			bf_get(lpfc_wcqe_xa_xri, axri),
+			bf_get(lpfc_wcqe_xa_status, axri));
+
+	if (bf_get(lpfc_wcqe_xa_status, axri) == IOSTAT_LOCAL_REJECT)
+		lpfc_sli_abts_recover_port(vport, ndlp);
+}
+
 /**
  * lpfc_sli_async_event_handler - ASYNC iocb handler function
  * @phba: Pointer to HBA context object.
@@ -8232,63 +8369,58 @@ lpfc_sli_async_event_handler(struct lpfc_hba * phba,
 {
 	IOCB_t *icmd;
 	uint16_t evt_code;
-	uint16_t temp;
 	struct temp_event temp_event_data;
 	struct Scsi_Host *shost;
 	uint32_t *iocb_w;
 
 	icmd = &iocbq->iocb;
 	evt_code = icmd->un.asyncstat.evt_code;
-	temp = icmd->ulpContext;
 
-	if ((evt_code != ASYNC_TEMP_WARN) &&
-		(evt_code != ASYNC_TEMP_SAFE)) {
+	switch (evt_code) {
+	case ASYNC_TEMP_WARN:
+	case ASYNC_TEMP_SAFE:
+		temp_event_data.data = (uint32_t) icmd->ulpContext;
+		temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT;
+		if (evt_code == ASYNC_TEMP_WARN) {
+			temp_event_data.event_code = LPFC_THRESHOLD_TEMP;
+			lpfc_printf_log(phba, KERN_ERR, LOG_TEMP,
+				"0347 Adapter is very hot, please take "
+				"corrective action. temperature : %d Celsius\n",
+				(uint32_t) icmd->ulpContext);
+		} else {
+			temp_event_data.event_code = LPFC_NORMAL_TEMP;
+			lpfc_printf_log(phba, KERN_ERR, LOG_TEMP,
+				"0340 Adapter temperature is OK now. "
+				"temperature : %d Celsius\n",
+				(uint32_t) icmd->ulpContext);
+		}
+
+		/* Send temperature change event to applications */
+		shost = lpfc_shost_from_vport(phba->pport);
+		fc_host_post_vendor_event(shost, fc_get_event_number(),
+			sizeof(temp_event_data), (char *) &temp_event_data,
+			LPFC_NL_VENDOR_ID);
+		break;
+	case ASYNC_STATUS_CN:
+		lpfc_sli_abts_err_handler(phba, iocbq);
+		break;
+	default:
 		iocb_w = (uint32_t *) icmd;
-		lpfc_printf_log(phba,
-			KERN_ERR,
-			LOG_SLI,
+		lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
 			"0346 Ring %d handler: unexpected ASYNC_STATUS"
 			" evt_code 0x%x\n"
 			"W0  0x%08x W1  0x%08x W2  0x%08x W3  0x%08x\n"
 			"W4  0x%08x W5  0x%08x W6  0x%08x W7  0x%08x\n"
 			"W8  0x%08x W9  0x%08x W10 0x%08x W11 0x%08x\n"
 			"W12 0x%08x W13 0x%08x W14 0x%08x W15 0x%08x\n",
-			pring->ringno,
-			icmd->un.asyncstat.evt_code,
+			pring->ringno, icmd->un.asyncstat.evt_code,
 			iocb_w[0], iocb_w[1], iocb_w[2], iocb_w[3],
 			iocb_w[4], iocb_w[5], iocb_w[6], iocb_w[7],
 			iocb_w[8], iocb_w[9], iocb_w[10], iocb_w[11],
 			iocb_w[12], iocb_w[13], iocb_w[14], iocb_w[15]);
 
-		return;
-	}
-	temp_event_data.data = (uint32_t)temp;
-	temp_event_data.event_type = FC_REG_TEMPERATURE_EVENT;
-	if (evt_code == ASYNC_TEMP_WARN) {
-		temp_event_data.event_code = LPFC_THRESHOLD_TEMP;
-		lpfc_printf_log(phba,
-				KERN_ERR,
-				LOG_TEMP,
-				"0347 Adapter is very hot, please take "
-				"corrective action. temperature : %d Celsius\n",
-				temp);
-	}
-	if (evt_code == ASYNC_TEMP_SAFE) {
-		temp_event_data.event_code = LPFC_NORMAL_TEMP;
-		lpfc_printf_log(phba,
-				KERN_ERR,
-				LOG_TEMP,
-				"0340 Adapter temperature is OK now. "
-				"temperature : %d Celsius\n",
-				temp);
+		break;
 	}
-
-	/* Send temperature change event to applications */
-	shost = lpfc_shost_from_vport(phba->pport);
-	fc_host_post_vendor_event(shost, fc_get_event_number(),
-		sizeof(temp_event_data), (char *) &temp_event_data,
-		LPFC_NL_VENDOR_ID);
-
 }
 
 
@@ -9247,6 +9379,14 @@ void
 lpfc_sli_abort_fcp_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 			struct lpfc_iocbq *rspiocb)
 {
+	lpfc_printf_log(phba, KERN_INFO, LOG_SLI,
+			"3096 ABORT_XRI_CN completing on xri x%x "
+			"original iotag x%x, abort cmd iotag x%x "
+			"status 0x%x, reason 0x%x\n",
+			cmdiocb->iocb.un.acxri.abortContextTag,
+			cmdiocb->iocb.un.acxri.abortIoTag,
+			cmdiocb->iotag, rspiocb->iocb.ulpStatus,
+			rspiocb->iocb.un.ulpWord[4]);
 	lpfc_sli_release_iocbq(phba, cmdiocb);
 	return;
 }