[SCSI] scsi_dh_rdac : Add definitions for different RDAC operating modes

This patch adds definitions to support for different operating modes
for LSI rdac storage.  Currently, rdac support 3 operation modes.

1. RDAC mode(legacy)
2. AVT mode
3. IOSHIP mode

These definitions are used while activating the path(rdac_activate).

Signed-off-by: Babu Moger <babu.moger@lsi.com>
Reviewed-by: Yanling Qi <yanling.qi@lsi.com>
Reviewed-by: Sudhir Dachepalli <Sudhir.Dachepalli@lis.com>
Reviewed-by: Somasundaram Krishnasamy <Somasundaram.Krishnasamy@lsi.com>
Reviewed-by: Bob Stankey <Robert.Stankey@lsi.com>
Reviewed-by: Vijay Chauhan <Vijay.Chauhan@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 19 insertions, 3 deletions

diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index 293c183dfe6d..afb2fb1a5186 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -182,6 +182,12 @@ struct rdac_dh_data {
         struct rdac_controller  *ctlr;
 #define UNINITIALIZED_LUN       (1 << 8)
         unsigned                lun;
+
+#define RDAC_MODE               0
+#define RDAC_MODE_AVT           1
+#define RDAC_MODE_IOSHIP        2
+        unsigned char           mode;
+
 #define RDAC_STATE_ACTIVE       0
 #define RDAC_STATE_PASSIVE      1
         unsigned char           state;
@@ -190,6 +196,11 @@ struct rdac_dh_data {
 #define RDAC_LUN_OWNED          1
 #define RDAC_LUN_AVT            2
         char                    lun_state;
+
+#define RDAC_PREFERRED          0
+#define RDAC_NON_PREFERRED      1
+        char                    preferred;
+
         unsigned char           sense[SCSI_SENSE_BUFFERSIZE];
         union                   {
                 struct c2_inquiry c2;
@@ -199,11 +210,15 @@ struct rdac_dh_data {
         } inq;
 };
 
+static const char *mode[] = {
+        "RDAC",
+        "AVT",
+        "IOSHIP",
+};
 static const char *lun_state[] =
 {
         "unowned",
         "owned",
-        "owned (AVT mode)",
 };
 
 struct rdac_queue_data {
@@ -836,8 +851,9 @@ static int rdac_bus_attach(struct scsi_device *sdev)
         spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
 
         sdev_printk(KERN_NOTICE, sdev,
-                    "%s: LUN %d (%s)\n",
-                    RDAC_NAME, h->lun, lun_state[(int)h->lun_state]);
+                    "%s: LUN %d (%s) (%s)\n",
+                    RDAC_NAME, h->lun, mode[(int)h->mode],
+                    lun_state[(int)h->lun_state]);
 
         return 0;