[PATCH v3 05/19] lpfc: vmid: API to check if VMID is enabled.

[Muneendra]

From: Gaurav Srivastava <gaurav.srivastava at broadcom.com>

This API will determine if VMID is enabled by the user or not.

Signed-off-by: Gaurav Srivastava  <gaurav.srivastava at broadcom.com>
Signed-off-by: James Smart <jsmart2021 at gmail.com>

---
v3:
No change

v2:
Ported the patch on top of 5.10/scsi-queue
---
 drivers/scsi/lpfc/lpfc.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 8f0062d2b891..a62e985aa180 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -1506,3 +1506,27 @@ static const char *routine(enum enum_name table_key)			\
 	}								\
 	return name;							\
 }
+
+/**
+ * lpfc_is_vmid_enabled - returns if VMID is enabled for either switch types
+ * @phba: Pointer to HBA context object.
+ *
+ * Relationship between the enable, target support and if vmid tag is required
+ * for the particular combination
+ * ---------------------------------------------------
+ * Switch    Enable Flag  Target Support  VMID Needed
+ * ---------------------------------------------------
+ * App Id     0              NA              N
+ * App Id     1               0              N
+ * App Id     1               1              Y
+ * Pr Tag     0              NA              N
+ * Pr Tag     1               0              N
+ * Pr Tag     1               1              Y
+ * Pr Tag     2               *              Y
+ ---------------------------------------------------
+ *
+ **/
+static inline int lpfc_is_vmid_enabled(struct lpfc_hba *phba)
+{
+	return phba->cfg_vmid_app_header || phba->cfg_vmid_priority_tagging;
+}
-- 
2.26.2

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