[SCSI] mptfusion: Support SAS2.0 Devices with SAS1.0 Controllers

SAS1.0 Controller was not able to detect SAS2.0 Expanders due to Link
RATE detection was limited to 1.5 Gbps and 3.0 Gbps for SAS1
controllers. Added detection for 6.0 Gbps link.  Now, user can mix-up
6.0 Gpbs links with SAS1.0 controller.

e.g SAS1.0 HBA <----> SAS2.0 Expander <------> SAS2.0 Expander <--------> SAS1.0 Drive.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

4 files changed, 13 insertions, 2 deletions

diff --git a/drivers/message/fusion/lsi/mpi_cnfg.h b/drivers/message/fusion/lsi/mpi_cnfg.h
index 013c7d881948..22027e7946f7 100644
--- a/drivers/message/fusion/lsi/mpi_cnfg.h
+++ b/drivers/message/fusion/lsi/mpi_cnfg.h
@@ -2593,6 +2593,7 @@ typedef struct _CONFIG_PAGE_SAS_IO_UNIT_0
 #define MPI_SAS_IOUNIT0_RATE_SATA_OOB_COMPLETE              (0x03)
 #define MPI_SAS_IOUNIT0_RATE_1_5                            (0x08)
 #define MPI_SAS_IOUNIT0_RATE_3_0                            (0x09)
+#define MPI_SAS_IOUNIT0_RATE_6_0                            (0x0A)
 
 /* see mpi_sas.h for values for SAS IO Unit Page 0 ControllerPhyDeviceInfo values */
 
diff --git a/drivers/message/fusion/lsi/mpi_ioc.h b/drivers/message/fusion/lsi/mpi_ioc.h
index 8faa4fab7b89..fd6222882a0e 100644
--- a/drivers/message/fusion/lsi/mpi_ioc.h
+++ b/drivers/message/fusion/lsi/mpi_ioc.h
@@ -841,6 +841,7 @@ typedef struct _EVENT_DATA_SAS_PHY_LINK_STATUS
 #define MPI_EVENT_SAS_PLS_LR_RATE_SATA_OOB_COMPLETE         (0x03)
 #define MPI_EVENT_SAS_PLS_LR_RATE_1_5                       (0x08)
 #define MPI_EVENT_SAS_PLS_LR_RATE_3_0                       (0x09)
+#define MPI_EVENT_SAS_PLS_LR_RATE_6_0                       (0x0A)
 
 /* SAS Discovery Event data */
 
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 3358c0af3466..ec8080c98081 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -7418,7 +7418,12 @@ mpt_display_event_info(MPT_ADAPTER *ioc, EventNotificationReply_t *pEventReply)
                 case MPI_EVENT_SAS_PLS_LR_RATE_3_0:
                         snprintf(evStr, EVENT_DESCR_STR_SZ,
                            "SAS PHY Link Status: Phy=%d:"
-                           " Rate 3.0 Gpbs",PhyNumber);
+                           " Rate 3.0 Gbps", PhyNumber);
+                        break;
+                case MPI_EVENT_SAS_PLS_LR_RATE_6_0:
+                        snprintf(evStr, EVENT_DESCR_STR_SZ,
+                           "SAS PHY Link Status: Phy=%d:"
+                           " Rate 6.0 Gbps", PhyNumber);
                         break;
                 default:
                         snprintf(evStr, EVENT_DESCR_STR_SZ,
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 8aefb1829fcd..518cfcaaaa4e 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -3063,6 +3063,9 @@ static int mptsas_probe_one_phy(struct device *dev,
         case MPI_SAS_IOUNIT0_RATE_3_0:
                 phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
                 break;
+        case MPI_SAS_IOUNIT0_RATE_6_0:
+                phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
+                break;
         case MPI_SAS_IOUNIT0_RATE_SATA_OOB_COMPLETE:
         case MPI_SAS_IOUNIT0_RATE_UNKNOWN:
         default:
@@ -3691,7 +3694,8 @@ mptsas_send_link_status_event(struct fw_event_work *fw_event)
         }
 
         if (link_rate == MPI_SAS_IOUNIT0_RATE_1_5 ||
-            link_rate == MPI_SAS_IOUNIT0_RATE_3_0) {
+            link_rate == MPI_SAS_IOUNIT0_RATE_3_0 ||
+            link_rate == MPI_SAS_IOUNIT0_RATE_6_0) {
 
                 if (!port_info) {
                         if (ioc->old_sas_discovery_protocal) {