1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index f7fa8cd2ecad..c9cc40e5db24 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -302,6 +302,10 @@ struct ipr_config_table_entry {
 #define IPR_SUBTYPE_GENERIC_SCSI        1
 #define IPR_SUBTYPE_VOLUME_SET          2
 
+#define IPR_QUEUEING_MODEL(res) ((((res)->cfgte.flags) & 0x70) >> 4)
+#define IPR_QUEUE_FROZEN_MODEL  0
+#define IPR_QUEUE_NACA_MODEL            1
+
         struct ipr_res_addr res_addr;
         __be32 res_handle;
         __be32 reserved4[2];
@@ -1294,6 +1298,20 @@ static inline int ipr_is_gscsi(struct ipr_resource_entry *res)
 }
 
 /**
+ * ipr_is_naca_model - Determine if a resource is using NACA queueing model
+ * @res:        resource entry struct
+ *
+ * Return value:
+ *      1 if NACA queueing model / 0 if not NACA queueing model
+ **/
+static inline int ipr_is_naca_model(struct ipr_resource_entry *res)
+{
+        if (ipr_is_gscsi(res) && IPR_QUEUEING_MODEL(res) == IPR_QUEUE_NACA_MODEL)
+                return 1;
+        return 0;
+}
+
+/**
  * ipr_is_device - Determine if resource address is that of a device
  * @res_addr:   resource address struct
  *