scsi: lpfc: Revise lpfc_error_lost_link() reason code evaluation logic

Extended status reason code errors should mask off the IOERR_PARAM_MASK
before checking strict equalities for IOERR values.

Update the lpfc_error_lost_link() routine as such.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20230301231626.9621-9-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_crtn.h

@@ -458,6 +458,8 @@ void lpfc_get_cfgparam(struct lpfc_hba *);
 void lpfc_get_vport_cfgparam(struct lpfc_vport *);
 int lpfc_alloc_sysfs_attr(struct lpfc_vport *);
 void lpfc_free_sysfs_attr(struct lpfc_vport *);
+bool lpfc_error_lost_link(struct lpfc_vport *vport, u32 ulp_status,
+			  u32 ulp_word4);
 extern const struct attribute_group *lpfc_hba_groups[];
 extern const struct attribute_group *lpfc_vport_groups[];
 extern struct scsi_host_template lpfc_template;

drivers/scsi/lpfc/lpfc_ct.c

@@ -958,7 +958,7 @@ lpfc_cmpl_ct_cmd_gid_ft(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 		goto out;
 	}
-	if (lpfc_error_lost_link(ulp_status, ulp_word4)) {
+	if (lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
 		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 				 "0226 NS query failed due to link event: "
 				 "ulp_status x%x ulp_word4 x%x fc_flag x%x "
@@ -1181,7 +1181,7 @@ lpfc_cmpl_ct_cmd_gid_pt(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 		goto out;
 	}
-	if (lpfc_error_lost_link(ulp_status, ulp_word4)) {
+	if (lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
 		lpfc_printf_vlog(vport, KERN_INFO, LOG_DISCOVERY,
 				 "4166 NS query failed due to link event: "
 				 "ulp_status x%x ulp_word4 x%x fc_flag x%x "

drivers/scsi/lpfc/lpfc_els.c

@@ -1088,7 +1088,7 @@ stop_rr_fcf_flogi:
 			}
 
 			/* Do not register VFI if the driver aborted FLOGI */
-			if (!lpfc_error_lost_link(ulp_status, ulp_word4))
+			if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
 				lpfc_issue_reg_vfi(vport);
 
 			lpfc_nlp_put(ndlp);
@@ -1207,7 +1207,7 @@ flogifail:
 	phba->fcf.fcf_flag &= ~FCF_DISCOVERY;
 	spin_unlock_irq(&phba->hbalock);
 
-	if (!lpfc_error_lost_link(ulp_status, ulp_word4)) {
+	if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
 		/* FLOGI failed, so just use loop map to make discovery list */
 		lpfc_disc_list_loopmap(vport);
 
@@ -2087,7 +2087,7 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 					 ulp_word4);
 
 		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
-		if (!lpfc_error_lost_link(ulp_status, ulp_word4))
+		if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
 			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
 						NLP_EVT_CMPL_PLOGI);
 
@@ -2383,7 +2383,7 @@ lpfc_cmpl_els_prli(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 				 ndlp->fc4_prli_sent);
 
 		/* Do not call DSM for lpfc_els_abort'ed ELS cmds */
-		if (!lpfc_error_lost_link(ulp_status, ulp_word4))
+		if (!lpfc_error_lost_link(vport, ulp_status, ulp_word4))
 			lpfc_disc_state_machine(vport, ndlp, cmdiocb,
 						NLP_EVT_CMPL_PRLI);
 
@@ -3038,7 +3038,7 @@ lpfc_cmpl_els_logo(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 				 ndlp->nlp_DID, ulp_status,
 				 ulp_word4);
 
-		if (lpfc_error_lost_link(ulp_status, ulp_word4))
+		if (lpfc_error_lost_link(vport, ulp_status, ulp_word4))
 			skip_recovery = 1;
 	}
 
@@ -4930,7 +4930,7 @@ lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 
 	if ((cmd == ELS_CMD_FLOGI) &&
 	    (phba->fc_topology != LPFC_TOPOLOGY_LOOP) &&
-	    !lpfc_error_lost_link(ulp_status, ulp_word4)) {
+	    !lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
 		/* FLOGI retry policy */
 		retry = 1;
 		/* retry FLOGI forever */
@@ -4944,7 +4944,7 @@ lpfc_els_retry(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 		else if (cmdiocb->retry >= 32)
 			delay = 1000;
 	} else if ((cmd == ELS_CMD_FDISC) &&
-	    !lpfc_error_lost_link(ulp_status, ulp_word4)) {
+	    !lpfc_error_lost_link(vport, ulp_status, ulp_word4)) {
 		/* retry FDISCs every second up to devloss */
 		retry = 1;
 		maxretry = vport->cfg_devloss_tmo;

drivers/scsi/lpfc/lpfc_hbadisc.c

@@ -7269,3 +7269,38 @@ lpfc_parse_fcoe_conf(struct lpfc_hba *phba,
 		lpfc_read_fcf_conn_tbl(phba, rec_ptr);
 
 }
+
+/*
+ * lpfc_error_lost_link - IO failure from link event or FW reset check.
+ *
+ * @vport: Pointer to lpfc_vport data structure.
+ * @ulp_status: IO completion status.
+ * @ulp_word4: Reason code for the ulp_status.
+ *
+ * This function evaluates the ulp_status and ulp_word4 values
+ * for specific error values that indicate an internal link fault
+ * or fw reset event for the completing IO.  Callers require this
+ * common data to decide next steps on the IO.
+ *
+ * Return:
+ * false - No link or reset error occurred.
+ * true - A link or reset error occurred.
+ */
+bool
+lpfc_error_lost_link(struct lpfc_vport *vport, u32 ulp_status, u32 ulp_word4)
+{
+	/* Mask off the extra port data to get just the reason code. */
+	u32 rsn_code = IOERR_PARAM_MASK & ulp_word4;
+
+	if (ulp_status == IOSTAT_LOCAL_REJECT &&
+	    (rsn_code == IOERR_SLI_ABORTED ||
+	     rsn_code == IOERR_LINK_DOWN ||
+	     rsn_code == IOERR_SLI_DOWN)) {
+		lpfc_printf_vlog(vport, KERN_WARNING, LOG_SLI | LOG_ELS,
+				 "0408 Report link error true: <x%x:x%x>\n",
+				 ulp_status, ulp_word4);
+		return true;
+	}
+
+	return false;
+}

drivers/scsi/lpfc/lpfc_hw.h

@@ -4435,16 +4435,4 @@ lpfc_is_LC_HBA(unsigned short device)
 		return 0;
 }
 
-/*
- * Determine if failed because of a link event or firmware reset.
- */
-static inline int
-lpfc_error_lost_link(u32 ulp_status, u32 ulp_word4)
-{
-	return (ulp_status == IOSTAT_LOCAL_REJECT &&
-		(ulp_word4 == IOERR_SLI_ABORTED ||
-		 ulp_word4 == IOERR_LINK_DOWN ||
-		 ulp_word4 == IOERR_SLI_DOWN));
-}
-
 #define BPL_ALIGN_SZ 8 /* 8 byte alignment for bpl and mbufs */