Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (110 commits)
  [SCSI] qla2xxx: Refactor call to qla2xxx_read_sfp for thermal temperature.
  [SCSI] qla2xxx: Unify the read/write sfp mailbox command routines.
  [SCSI] qla2xxx: Clear complete initialization control block.
  [SCSI] qla2xxx: Allow an override of the registered maximum LUN.
  [SCSI] qla2xxx: Add host number in reset and quiescent message logs.
  [SCSI] qla2xxx: Correctly read sfp single byte mailbox register.
  [SCSI] qla2xxx: Add qla82xx_rom_unlock() function.
  [SCSI] qla2xxx: Log if qla82xx firmware fails to load from flash.
  [SCSI] qla2xxx: Use passed in host to initialize local scsi_qla_host in queuecommand function
  [SCSI] qla2xxx: Correct buffer start in edc sysfs debug print.
  [SCSI] qla2xxx: Update firmware version after flash update for ISP82xx.
  [SCSI] qla2xxx: Fix hang during driver unload when vport is active.
  [SCSI] qla2xxx: Properly set the dsd_list_len for dsd_chaining in cmd type 6.
  [SCSI] qla2xxx: Fix virtual port failing to login after chip reset.
  [SCSI] qla2xxx: Fix vport delete hang when logins are outstanding.
  [SCSI] hpsa: Change memset using sizeof(ptr) to sizeof(*ptr)
  [SCSI] ipr: Rate limit DMA mapping errors
  [SCSI] hpsa: add P2000 to list of shared SAS devices
  [SCSI] hpsa: do not attempt PCI power management reset method if we know it won't work.
  [SCSI] hpsa: remove superfluous sleeps around reset code
  ...

5 files changed, 638 insertions, 76 deletions

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 3346357031e..efa0255491c 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -522,7 +522,8 @@ _base_display_event_data(struct MPT2SAS_ADAPTER *ioc,
                 desc = "Device Status Change";
                 break;
         case MPI2_EVENT_IR_OPERATION_STATUS:
-                desc = "IR Operation Status";
+                if (!ioc->hide_ir_msg)
+                        desc = "IR Operation Status";
                 break;
         case MPI2_EVENT_SAS_DISCOVERY:
         {
@@ -553,16 +554,20 @@ _base_display_event_data(struct MPT2SAS_ADAPTER *ioc,
                 desc = "SAS Enclosure Device Status Change";
                 break;
         case MPI2_EVENT_IR_VOLUME:
-                desc = "IR Volume";
+                if (!ioc->hide_ir_msg)
+                        desc = "IR Volume";
                 break;
         case MPI2_EVENT_IR_PHYSICAL_DISK:
-                desc = "IR Physical Disk";
+                if (!ioc->hide_ir_msg)
+                        desc = "IR Physical Disk";
                 break;
         case MPI2_EVENT_IR_CONFIGURATION_CHANGE_LIST:
-                desc = "IR Configuration Change List";
+                if (!ioc->hide_ir_msg)
+                        desc = "IR Configuration Change List";
                 break;
         case MPI2_EVENT_LOG_ENTRY_ADDED:
-                desc = "Log Entry Added";
+                if (!ioc->hide_ir_msg)
+                        desc = "Log Entry Added";
                 break;
         }
 
@@ -616,7 +621,10 @@ _base_sas_log_info(struct MPT2SAS_ADAPTER *ioc , u32 log_info)
                 originator_str = "PL";
                 break;
         case 2:
-                originator_str = "IR";
+                if (!ioc->hide_ir_msg)
+                        originator_str = "IR";
+                else
+                        originator_str = "WarpDrive";
                 break;
         }
 
@@ -1508,6 +1516,7 @@ mpt2sas_base_free_smid(struct MPT2SAS_ADAPTER *ioc, u16 smid)
                 }
                 ioc->scsi_lookup[i].cb_idx = 0xFF;
                 ioc->scsi_lookup[i].scmd = NULL;
+                ioc->scsi_lookup[i].direct_io = 0;
                 list_add_tail(&ioc->scsi_lookup[i].tracker_list,
                     &ioc->free_list);
                 spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
@@ -1844,10 +1853,12 @@ _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
         printk("), ");
         printk("Capabilities=(");
 
-        if (ioc->facts.IOCCapabilities &
-            MPI2_IOCFACTS_CAPABILITY_INTEGRATED_RAID) {
-                printk("Raid");
-                i++;
+        if (!ioc->hide_ir_msg) {
+                if (ioc->facts.IOCCapabilities &
+                    MPI2_IOCFACTS_CAPABILITY_INTEGRATED_RAID) {
+                        printk("Raid");
+                        i++;
+                }
         }
 
         if (ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_TLR) {
@@ -3680,6 +3691,7 @@ _base_make_ioc_operational(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
         u32 reply_address;
         u16 smid;
         struct _tr_list *delayed_tr, *delayed_tr_next;
+        u8 hide_flag;
 
         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
             __func__));
@@ -3706,6 +3718,7 @@ _base_make_ioc_operational(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
                 ioc->scsi_lookup[i].cb_idx = 0xFF;
                 ioc->scsi_lookup[i].smid = smid;
                 ioc->scsi_lookup[i].scmd = NULL;
+                ioc->scsi_lookup[i].direct_io = 0;
                 list_add_tail(&ioc->scsi_lookup[i].tracker_list,
                     &ioc->free_list);
         }
@@ -3766,6 +3779,15 @@ _base_make_ioc_operational(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
         if (sleep_flag == CAN_SLEEP)
                 _base_static_config_pages(ioc);
 
+        if (ioc->wait_for_port_enable_to_complete && ioc->is_warpdrive) {
+                if (ioc->manu_pg10.OEMIdentifier  == 0x80) {
+                        hide_flag = (u8) (ioc->manu_pg10.OEMSpecificFlags0 &
+                            MFG_PAGE10_HIDE_SSDS_MASK);
+                        if (hide_flag != MFG_PAGE10_HIDE_SSDS_MASK)
+                                ioc->mfg_pg10_hide_flag = hide_flag;
+                }
+        }
+
         if (ioc->wait_for_port_enable_to_complete) {
                 if (diag_buffer_enable != 0)
                         mpt2sas_enable_diag_buffer(ioc, diag_buffer_enable);
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index 500328245f6..2a3c05f6db8 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -69,11 +69,11 @@
 #define MPT2SAS_DRIVER_NAME             "mpt2sas"
 #define MPT2SAS_AUTHOR  "LSI Corporation <DL-MPTFusionLinux@lsi.com>"
 #define MPT2SAS_DESCRIPTION     "LSI MPT Fusion SAS 2.0 Device Driver"
-#define MPT2SAS_DRIVER_VERSION          "08.100.00.00"
+#define MPT2SAS_DRIVER_VERSION          "08.100.00.01"
 #define MPT2SAS_MAJOR_VERSION           08
 #define MPT2SAS_MINOR_VERSION           100
 #define MPT2SAS_BUILD_VERSION           00
-#define MPT2SAS_RELEASE_VERSION         00
+#define MPT2SAS_RELEASE_VERSION         01
 
 /*
  * Set MPT2SAS_SG_DEPTH value based on user input.
@@ -189,6 +189,16 @@
 #define MPT2SAS_HP_DAUGHTER_2_4_INTERNAL_SSDID        0x0046
 
 /*
+ *  WarpDrive Specific Log codes
+ */
+
+#define MPT2_WARPDRIVE_LOGENTRY         (0x8002)
+#define MPT2_WARPDRIVE_LC_SSDT          (0x41)
+#define MPT2_WARPDRIVE_LC_SSDLW         (0x43)
+#define MPT2_WARPDRIVE_LC_SSDLF         (0x44)
+#define MPT2_WARPDRIVE_LC_BRMF          (0x4D)
+
+/*
  * per target private data
  */
 #define MPT_TARGET_FLAGS_RAID_COMPONENT 0x01
@@ -199,6 +209,7 @@
  * struct MPT2SAS_TARGET - starget private hostdata
  * @starget: starget object
  * @sas_address: target sas address
+ * @raid_device: raid_device pointer to access volume data
  * @handle: device handle
  * @num_luns: number luns
  * @flags: MPT_TARGET_FLAGS_XXX flags
@@ -208,6 +219,7 @@
 struct MPT2SAS_TARGET {
         struct scsi_target *starget;
         u64     sas_address;
+        struct _raid_device *raid_device;
         u16     handle;
         int     num_luns;
         u32     flags;
@@ -215,6 +227,7 @@ struct MPT2SAS_TARGET {
         u8      tm_busy;
 };
 
+
 /*
  * per device private data
  */
@@ -262,6 +275,12 @@ typedef struct _MPI2_CONFIG_PAGE_MAN_10 {
   MPI2_POINTER PTR_MPI2_CONFIG_PAGE_MAN_10,
   Mpi2ManufacturingPage10_t, MPI2_POINTER pMpi2ManufacturingPage10_t;
 
+#define MFG_PAGE10_HIDE_SSDS_MASK       (0x00000003)
+#define MFG_PAGE10_HIDE_ALL_DISKS       (0x00)
+#define MFG_PAGE10_EXPOSE_ALL_DISKS     (0x01)
+#define MFG_PAGE10_HIDE_IF_VOL_PRESENT  (0x02)
+
+
 struct MPT2SAS_DEVICE {
         struct MPT2SAS_TARGET *sas_target;
         unsigned int    lun;
@@ -341,6 +360,7 @@ struct _sas_device {
  * @sdev: scsi device struct (volumes are single lun)
  * @wwid: unique identifier for the volume
  * @handle: device handle
+ * @block_size: Block size of the volume
  * @id: target id
  * @channel: target channel
  * @volume_type: the raid level
@@ -348,20 +368,33 @@ struct _sas_device {
  * @num_pds: number of hidden raid components
  * @responding: used in _scsih_raid_device_mark_responding
  * @percent_complete: resync percent complete
+ * @direct_io_enabled: Whether direct io to PDs are allowed or not
+ * @stripe_exponent: X where 2powX is the stripe sz in blocks
+ * @max_lba: Maximum number of LBA in the volume
+ * @stripe_sz: Stripe Size of the volume
+ * @device_info: Device info of the volume member disk
+ * @pd_handle: Array of handles of the physical drives for direct I/O in le16
  */
+#define MPT_MAX_WARPDRIVE_PDS           8
 struct _raid_device {
         struct list_head list;
         struct scsi_target *starget;
         struct scsi_device *sdev;
         u64     wwid;
         u16     handle;
+        u16     block_sz;
         int     id;
         int     channel;
         u8      volume_type;
-        u32     device_info;
         u8      num_pds;
         u8      responding;
         u8      percent_complete;
+        u8      direct_io_enabled;
+        u8      stripe_exponent;
+        u64     max_lba;
+        u32     stripe_sz;
+        u32     device_info;
+        u16     pd_handle[MPT_MAX_WARPDRIVE_PDS];
 };
 
 /**
@@ -470,6 +503,7 @@ struct chain_tracker {
  * @smid: system message id
  * @scmd: scsi request pointer
  * @cb_idx: callback index
+ * @direct_io: To indicate whether I/O is direct (WARPDRIVE)
  * @chain_list: list of chains associated to this IO
  * @tracker_list: list of free request (ioc->free_list)
  */
@@ -477,14 +511,14 @@ struct scsiio_tracker {
         u16     smid;
         struct scsi_cmnd *scmd;
         u8      cb_idx;
+        u8      direct_io;
         struct list_head chain_list;
         struct list_head tracker_list;
 };
 
 /**
- * struct request_tracker - misc mf request tracker
+ * struct request_tracker - firmware request tracker
  * @smid: system message id
- * @scmd: scsi request pointer
  * @cb_idx: callback index
  * @tracker_list: list of free request (ioc->free_list)
  */
@@ -832,6 +866,11 @@ struct MPT2SAS_ADAPTER {
         u32             diagnostic_flags[MPI2_DIAG_BUF_TYPE_COUNT];
         u32             ring_buffer_offset;
         u32             ring_buffer_sz;
+        u8              is_warpdrive;
+        u8              hide_ir_msg;
+        u8              mfg_pg10_hide_flag;
+        u8              hide_drives;
+
 };
 
 typedef u8 (*MPT_CALLBACK)(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
index d72f1f2b139..437c2d94c45 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -1041,7 +1041,10 @@ _ctl_getiocinfo(void __user *arg)
             __func__));
 
         memset(&karg, 0 , sizeof(karg));
-        karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
+        if (ioc->is_warpdrive)
+                karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
+        else
+                karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
         if (ioc->pfacts)
                 karg.port_number = ioc->pfacts[0].PortNumber;
         pci_read_config_byte(ioc->pdev, PCI_CLASS_REVISION, &revision);
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.h b/drivers/scsi/mpt2sas/mpt2sas_ctl.h
index 69916e46e04..11ff1d5fb8f 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.h
@@ -133,6 +133,7 @@ struct mpt2_ioctl_pci_info {
 #define MPT2_IOCTL_INTERFACE_FC_IP      (0x02)
 #define MPT2_IOCTL_INTERFACE_SAS        (0x03)
 #define MPT2_IOCTL_INTERFACE_SAS2       (0x04)
+#define MPT2_IOCTL_INTERFACE_SAS2_SSS6200       (0x05)
 #define MPT2_IOCTL_VERSION_LENGTH       (32)
 
 /**
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index d2064a0533a..f12e02358d6 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -233,6 +233,9 @@ static struct pci_device_id scsih_pci_table[] = {
                 PCI_ANY_ID, PCI_ANY_ID },
         { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2308_3,
                 PCI_ANY_ID, PCI_ANY_ID },
+        /* SSS6200 */
+        { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SSS6200,
+                PCI_ANY_ID, PCI_ANY_ID },
         {0}     /* Terminating entry */
 };
 MODULE_DEVICE_TABLE(pci, scsih_pci_table);
@@ -1256,6 +1259,7 @@ _scsih_target_alloc(struct scsi_target *starget)
                         sas_target_priv_data->handle = raid_device->handle;
                         sas_target_priv_data->sas_address = raid_device->wwid;
                         sas_target_priv_data->flags |= MPT_TARGET_FLAGS_VOLUME;
+                        sas_target_priv_data->raid_device = raid_device;
                         raid_device->starget = starget;
                 }
                 spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
@@ -1455,7 +1459,10 @@ static int
 _scsih_is_raid(struct device *dev)
 {
         struct scsi_device *sdev = to_scsi_device(dev);
+        struct MPT2SAS_ADAPTER *ioc = shost_priv(sdev->host);
 
+        if (ioc->is_warpdrive)
+                return 0;
         return (sdev->channel == RAID_CHANNEL) ? 1 : 0;
 }
 
@@ -1480,7 +1487,7 @@ _scsih_get_resync(struct device *dev)
             sdev->channel);
         spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
 
-        if (!raid_device)
+        if (!raid_device || ioc->is_warpdrive)
                 goto out;
 
         if (mpt2sas_config_get_raid_volume_pg0(ioc, &mpi_reply, &vol_pg0,
@@ -1640,6 +1647,212 @@ _scsih_get_volume_capabilities(struct MPT2SAS_ADAPTER *ioc,
 
         kfree(vol_pg0);
 }
+/**
+ * _scsih_disable_ddio - Disable direct I/O for all the volumes
+ * @ioc: per adapter object
+ */
+static void
+_scsih_disable_ddio(struct MPT2SAS_ADAPTER *ioc)
+{
+        Mpi2RaidVolPage1_t vol_pg1;
+        Mpi2ConfigReply_t mpi_reply;
+        struct _raid_device *raid_device;
+        u16 handle;
+        u16 ioc_status;
+
+        handle = 0xFFFF;
+        while (!(mpt2sas_config_get_raid_volume_pg1(ioc, &mpi_reply,
+            &vol_pg1, MPI2_RAID_VOLUME_PGAD_FORM_GET_NEXT_HANDLE, handle))) {
+                ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
+                    MPI2_IOCSTATUS_MASK;
+                if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
+                        break;
+                handle = le16_to_cpu(vol_pg1.DevHandle);
+                raid_device = _scsih_raid_device_find_by_handle(ioc, handle);
+                if (raid_device)
+                        raid_device->direct_io_enabled = 0;
+        }
+        return;
+}
+
+
+/**
+ * _scsih_get_num_volumes - Get number of volumes in the ioc
+ * @ioc: per adapter object
+ */
+static u8
+_scsih_get_num_volumes(struct MPT2SAS_ADAPTER *ioc)
+{
+        Mpi2RaidVolPage1_t vol_pg1;
+        Mpi2ConfigReply_t mpi_reply;
+        u16 handle;
+        u8 vol_cnt = 0;
+        u16 ioc_status;
+
+        handle = 0xFFFF;
+        while (!(mpt2sas_config_get_raid_volume_pg1(ioc, &mpi_reply,
+            &vol_pg1, MPI2_RAID_VOLUME_PGAD_FORM_GET_NEXT_HANDLE, handle))) {
+                ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
+                    MPI2_IOCSTATUS_MASK;
+                if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
+                        break;
+                vol_cnt++;
+                handle = le16_to_cpu(vol_pg1.DevHandle);
+        }
+        return vol_cnt;
+}
+
+
+/**
+ * _scsih_init_warpdrive_properties - Set properties for warpdrive direct I/O.
+ * @ioc: per adapter object
+ * @raid_device: the raid_device object
+ */
+static void
+_scsih_init_warpdrive_properties(struct MPT2SAS_ADAPTER *ioc,
+        struct _raid_device *raid_device)
+{
+        Mpi2RaidVolPage0_t *vol_pg0;
+        Mpi2RaidPhysDiskPage0_t pd_pg0;
+        Mpi2ConfigReply_t mpi_reply;
+        u16 sz;
+        u8 num_pds, count;
+        u64 mb = 1024 * 1024;
+        u64 tb_2 = 2 * mb * mb;
+        u64 capacity;
+        u32 stripe_sz;
+        u8 i, stripe_exp;
+
+        if (!ioc->is_warpdrive)
+                return;
+
+        if (ioc->mfg_pg10_hide_flag ==  MFG_PAGE10_EXPOSE_ALL_DISKS) {
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                    "globally as drives are exposed\n", ioc->name);
+                return;
+        }
+        if (_scsih_get_num_volumes(ioc) > 1) {
+                _scsih_disable_ddio(ioc);
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                    "globally as number of drives > 1\n", ioc->name);
+                return;
+        }
+        if ((mpt2sas_config_get_number_pds(ioc, raid_device->handle,
+            &num_pds)) || !num_pds) {
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                    "Failure in computing number of drives\n", ioc->name);
+                return;
+        }
+
+        sz = offsetof(Mpi2RaidVolPage0_t, PhysDisk) + (num_pds *
+            sizeof(Mpi2RaidVol0PhysDisk_t));
+        vol_pg0 = kzalloc(sz, GFP_KERNEL);
+        if (!vol_pg0) {
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                    "Memory allocation failure for RVPG0\n", ioc->name);
+                return;
+        }
+
+        if ((mpt2sas_config_get_raid_volume_pg0(ioc, &mpi_reply, vol_pg0,
+             MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, raid_device->handle, sz))) {
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                    "Failure in retrieving RVPG0\n", ioc->name);
+                kfree(vol_pg0);
+                return;
+        }
+
+        /*
+         * WARPDRIVE:If number of physical disks in a volume exceeds the max pds
+         * assumed for WARPDRIVE, disable direct I/O
+         */
+        if (num_pds > MPT_MAX_WARPDRIVE_PDS) {
+                printk(MPT2SAS_WARN_FMT "WarpDrive : Direct IO is disabled "
+                    "for the drive with handle(0x%04x): num_mem=%d, "
+                    "max_mem_allowed=%d\n", ioc->name, raid_device->handle,
+                    num_pds, MPT_MAX_WARPDRIVE_PDS);
+                kfree(vol_pg0);
+                return;
+        }
+        for (count = 0; count < num_pds; count++) {
+                if (mpt2sas_config_get_phys_disk_pg0(ioc, &mpi_reply,
+                    &pd_pg0, MPI2_PHYSDISK_PGAD_FORM_PHYSDISKNUM,
+                    vol_pg0->PhysDisk[count].PhysDiskNum) ||
+                    pd_pg0.DevHandle == MPT2SAS_INVALID_DEVICE_HANDLE) {
+                        printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is "
+                            "disabled for the drive with handle(0x%04x) member"
+                            "handle retrieval failed for member number=%d\n",
+                            ioc->name, raid_device->handle,
+                            vol_pg0->PhysDisk[count].PhysDiskNum);
+                        goto out_error;
+                }
+                raid_device->pd_handle[count] = le16_to_cpu(pd_pg0.DevHandle);
+        }
+
+        /*
+         * Assumption for WD: Direct I/O is not supported if the volume is
+         * not RAID0, if the stripe size is not 64KB, if the block size is
+         * not 512 and if the volume size is >2TB
+         */
+        if (raid_device->volume_type != MPI2_RAID_VOL_TYPE_RAID0 ||
+            le16_to_cpu(vol_pg0->BlockSize) != 512) {
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                    "for the drive with handle(0x%04x): type=%d, "
+                    "s_sz=%uK, blk_size=%u\n", ioc->name,
+                    raid_device->handle, raid_device->volume_type,
+                    le32_to_cpu(vol_pg0->StripeSize)/2,
+                    le16_to_cpu(vol_pg0->BlockSize));
+                goto out_error;
+        }
+
+        capacity = (u64) le16_to_cpu(vol_pg0->BlockSize) *
+            (le64_to_cpu(vol_pg0->MaxLBA) + 1);
+
+        if (capacity > tb_2) {
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                "for the drive with handle(0x%04x) since drive sz > 2TB\n",
+                ioc->name, raid_device->handle);
+                goto out_error;
+        }
+
+        stripe_sz = le32_to_cpu(vol_pg0->StripeSize);
+        stripe_exp = 0;
+        for (i = 0; i < 32; i++) {
+                if (stripe_sz & 1)
+                        break;
+                stripe_exp++;
+                stripe_sz >>= 1;
+        }
+        if (i == 32) {
+                printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is disabled "
+                    "for the drive with handle(0x%04x) invalid stripe sz %uK\n",
+                    ioc->name, raid_device->handle,
+                    le32_to_cpu(vol_pg0->StripeSize)/2);
+                goto out_error;
+        }
+        raid_device->stripe_exponent = stripe_exp;
+        raid_device->direct_io_enabled = 1;
+
+        printk(MPT2SAS_INFO_FMT "WarpDrive : Direct IO is Enabled for the drive"
+            " with handle(0x%04x)\n", ioc->name, raid_device->handle);
+        /*
+         * WARPDRIVE: Though the following fields are not used for direct IO,
+         * stored for future purpose:
+         */
+        raid_device->max_lba = le64_to_cpu(vol_pg0->MaxLBA);
+        raid_device->stripe_sz = le32_to_cpu(vol_pg0->StripeSize);
+        raid_device->block_sz = le16_to_cpu(vol_pg0->BlockSize);
+
+
+        kfree(vol_pg0);
+        return;
+
+out_error:
+        raid_device->direct_io_enabled = 0;
+        for (count = 0; count < num_pds; count++)
+                raid_device->pd_handle[count] = 0;
+        kfree(vol_pg0);
+        return;
+}
 
 /**
  * _scsih_enable_tlr - setting TLR flags
@@ -1710,6 +1923,11 @@ _scsih_slave_configure(struct scsi_device *sdev)
 
                 _scsih_get_volume_capabilities(ioc, raid_device);
 
+                /*
+                 * WARPDRIVE: Initialize the required data for Direct IO
+                 */
+                _scsih_init_warpdrive_properties(ioc, raid_device);
+
                 /* RAID Queue Depth Support
                  * IS volume = underlying qdepth of drive type, either
                  *    MPT2SAS_SAS_QUEUE_DEPTH or MPT2SAS_SATA_QUEUE_DEPTH
@@ -1757,14 +1975,16 @@ _scsih_slave_configure(struct scsi_device *sdev)
                         break;
                 }
 
-                sdev_printk(KERN_INFO, sdev, "%s: "
-                    "handle(0x%04x), wwid(0x%016llx), pd_count(%d), type(%s)\n",
-                    r_level, raid_device->handle,
-                    (unsigned long long)raid_device->wwid,
-                    raid_device->num_pds, ds);
+                if (!ioc->hide_ir_msg)
+                        sdev_printk(KERN_INFO, sdev, "%s: handle(0x%04x), "
+                            "wwid(0x%016llx), pd_count(%d), type(%s)\n",
+                            r_level, raid_device->handle,
+                            (unsigned long long)raid_device->wwid,
+                            raid_device->num_pds, ds);
                 _scsih_change_queue_depth(sdev, qdepth, SCSI_QDEPTH_DEFAULT);
                 /* raid transport support */
-                _scsih_set_level(sdev, raid_device);
+                if (!ioc->is_warpdrive)
+                        _scsih_set_level(sdev, raid_device);
                 return 0;
         }
 
@@ -2133,8 +2353,7 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint channel,
         switch (type) {
         case MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK:
                 scmd_lookup = _scsih_scsi_lookup_get(ioc, smid_task);
-                if (scmd_lookup && (scmd_lookup->serial_number ==
-                    scmd->serial_number))
+                if (scmd_lookup)
                         rc = FAILED;
                 else
                         rc = SUCCESS;
@@ -2182,16 +2401,20 @@ _scsih_tm_display_info(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd)
         struct MPT2SAS_TARGET *priv_target = starget->hostdata;
         struct _sas_device *sas_device = NULL;
         unsigned long flags;
+        char *device_str = NULL;
 
         if (!priv_target)
                 return;
+        if (ioc->hide_ir_msg)
+                device_str = "WarpDrive";
+        else
+                device_str = "volume";
 
         scsi_print_command(scmd);
         if (priv_target->flags & MPT_TARGET_FLAGS_VOLUME) {
-                starget_printk(KERN_INFO, starget, "volume handle(0x%04x), "
-                    "volume wwid(0x%016llx)\n",
-                    priv_target->handle,
-                    (unsigned long long)priv_target->sas_address);
+                starget_printk(KERN_INFO, starget, "%s handle(0x%04x), "
+                    "%s wwid(0x%016llx)\n", device_str, priv_target->handle,
+                    device_str, (unsigned long long)priv_target->sas_address);
         } else {
                 spin_lock_irqsave(&ioc->sas_device_lock, flags);
                 sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
@@ -3130,6 +3353,9 @@ _scsih_check_ir_config_unhide_events(struct MPT2SAS_ADAPTER *ioc,
         a = 0;
         b = 0;
 
+        if (ioc->is_warpdrive)
+                return;
+
         /* Volume Resets for Deleted or Removed */
         element = (Mpi2EventIrConfigElement_t *)&event_data->ConfigElement[0];
         for (i = 0; i < event_data->NumElements; i++, element++) {
@@ -3347,6 +3573,105 @@ _scsih_eedp_error_handling(struct scsi_cmnd *scmd, u16 ioc_status)
 }
 
 /**
+ * _scsih_scsi_direct_io_get - returns direct io flag
+ * @ioc: per adapter object
+ * @smid: system request message index
+ *
+ * Returns the smid stored scmd pointer.
+ */
+static inline u8
+_scsih_scsi_direct_io_get(struct MPT2SAS_ADAPTER *ioc, u16 smid)
+{
+        return ioc->scsi_lookup[smid - 1].direct_io;
+}
+
+/**
+ * _scsih_scsi_direct_io_set - sets direct io flag
+ * @ioc: per adapter object
+ * @smid: system request message index
+ * @direct_io: Zero or non-zero value to set in the direct_io flag
+ *
+ * Returns Nothing.
+ */
+static inline void
+_scsih_scsi_direct_io_set(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 direct_io)
+{
+        ioc->scsi_lookup[smid - 1].direct_io = direct_io;
+}
+
+
+/**
+ * _scsih_setup_direct_io - setup MPI request for WARPDRIVE Direct I/O
+ * @ioc: per adapter object
+ * @scmd: pointer to scsi command object
+ * @raid_device: pointer to raid device data structure
+ * @mpi_request: pointer to the SCSI_IO reqest message frame
+ * @smid: system request message index
+ *
+ * Returns nothing
+ */
+static void
+_scsih_setup_direct_io(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
+        struct _raid_device *raid_device, Mpi2SCSIIORequest_t *mpi_request,
+        u16 smid)
+{
+        u32 v_lba, p_lba, stripe_off, stripe_unit, column, io_size;
+        u32 stripe_sz, stripe_exp;
+        u8 num_pds, *cdb_ptr, *tmp_ptr, *lba_ptr1, *lba_ptr2;
+        u8 cdb0 = scmd->cmnd[0];
+
+        /*
+         * Try Direct I/O to RAID memeber disks
+         */
+        if (cdb0 == READ_16 || cdb0 == READ_10 ||
+            cdb0 == WRITE_16 || cdb0 == WRITE_10) {
+                cdb_ptr = mpi_request->CDB.CDB32;
+
+                if ((cdb0 < READ_16) || !(cdb_ptr[2] | cdb_ptr[3] | cdb_ptr[4]
+                        | cdb_ptr[5])) {
+                        io_size = scsi_bufflen(scmd) >> 9;
+                        /* get virtual lba */
+                        lba_ptr1 = lba_ptr2 = (cdb0 < READ_16) ? &cdb_ptr[2] :
+                            &cdb_ptr[6];
+                        tmp_ptr = (u8 *)&v_lba + 3;
+                        *tmp_ptr-- = *lba_ptr1++;
+                        *tmp_ptr-- = *lba_ptr1++;
+                        *tmp_ptr-- = *lba_ptr1++;
+                        *tmp_ptr = *lba_ptr1;
+
+                        if (((u64)v_lba + (u64)io_size - 1) <=
+                            (u32)raid_device->max_lba) {
+                                stripe_sz = raid_device->stripe_sz;
+                                stripe_exp = raid_device->stripe_exponent;
+                                stripe_off = v_lba & (stripe_sz - 1);
+
+                                /* Check whether IO falls within a stripe */
+                                if ((stripe_off + io_size) <= stripe_sz) {
+                                        num_pds = raid_device->num_pds;
+                                        p_lba = v_lba >> stripe_exp;
+                                        stripe_unit = p_lba / num_pds;
+                                        column = p_lba % num_pds;
+                                        p_lba = (stripe_unit << stripe_exp) +
+                                            stripe_off;
+                                        mpi_request->DevHandle =
+                                                cpu_to_le16(raid_device->
+                                                    pd_handle[column]);
+                                        tmp_ptr = (u8 *)&p_lba + 3;
+                                        *lba_ptr2++ = *tmp_ptr--;
+                                        *lba_ptr2++ = *tmp_ptr--;
+                                        *lba_ptr2++ = *tmp_ptr--;
+                                        *lba_ptr2 = *tmp_ptr;
+                                        /*
+                                        * WD: To indicate this I/O is directI/O
+                                        */
+                                        _scsih_scsi_direct_io_set(ioc, smid, 1);
+                                }
+                        }
+                }
+        }
+}
+
+/**
  * _scsih_qcmd - main scsi request entry point
  * @scmd: pointer to scsi command object
  * @done: function pointer to be invoked on completion
@@ -3363,6 +3688,7 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
         struct MPT2SAS_ADAPTER *ioc = shost_priv(scmd->device->host);
         struct MPT2SAS_DEVICE *sas_device_priv_data;
         struct MPT2SAS_TARGET *sas_target_priv_data;
+        struct _raid_device *raid_device;
         Mpi2SCSIIORequest_t *mpi_request;
         u32 mpi_control;
         u16 smid;
@@ -3424,8 +3750,10 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
 
         } else
                 mpi_control |= MPI2_SCSIIO_CONTROL_SIMPLEQ;
-        /* Make sure Device is not raid volume */
-        if (!_scsih_is_raid(&scmd->device->sdev_gendev) &&
+        /* Make sure Device is not raid volume.
+         * We do not expose raid functionality to upper layer for warpdrive.
+         */
+        if (!ioc->is_warpdrive && !_scsih_is_raid(&scmd->device->sdev_gendev) &&
             sas_is_tlr_enabled(scmd->device) && scmd->cmd_len != 32)
                 mpi_control |= MPI2_SCSIIO_CONTROL_TLR_ON;
 
@@ -3473,9 +3801,14 @@ _scsih_qcmd_lck(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
                 }
         }
 
+        raid_device = sas_target_priv_data->raid_device;
+        if (raid_device && raid_device->direct_io_enabled)
+                _scsih_setup_direct_io(ioc, scmd, raid_device, mpi_request,
+                    smid);
+
         if (likely(mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST))
                 mpt2sas_base_put_smid_scsi_io(ioc, smid,
-                    sas_device_priv_data->sas_target->handle);
+                    le16_to_cpu(mpi_request->DevHandle));
         else
                 mpt2sas_base_put_smid_default(ioc, smid);
         return 0;
@@ -3540,10 +3873,16 @@ _scsih_scsi_ioc_info(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
         unsigned long flags;
         struct scsi_target *starget = scmd->device->sdev_target;
         struct MPT2SAS_TARGET *priv_target = starget->hostdata;
+        char *device_str = NULL;
 
         if (!priv_target)
                 return;
 
+        if (ioc->hide_ir_msg)
+                device_str = "WarpDrive";
+        else
+                device_str = "volume";
+
         if (log_info == 0x31170000)
                 return;
 
@@ -3660,8 +3999,8 @@ _scsih_scsi_ioc_info(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
         scsi_print_command(scmd);
 
         if (priv_target->flags & MPT_TARGET_FLAGS_VOLUME) {
-                printk(MPT2SAS_WARN_FMT "\tvolume wwid(0x%016llx)\n", ioc->name,
-                    (unsigned long long)priv_target->sas_address);
+                printk(MPT2SAS_WARN_FMT "\t%s wwid(0x%016llx)\n", ioc->name,
+                    device_str, (unsigned long long)priv_target->sas_address);
         } else {
                 spin_lock_irqsave(&ioc->sas_device_lock, flags);
                 sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
@@ -3840,6 +4179,20 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
                 scmd->result = DID_NO_CONNECT << 16;
                 goto out;
         }
+        /*
+         * WARPDRIVE: If direct_io is set then it is directIO,
+         * the failed direct I/O should be redirected to volume
+         */
+        if (_scsih_scsi_direct_io_get(ioc, smid)) {
+                _scsih_scsi_direct_io_set(ioc, smid, 0);
+                memcpy(mpi_request->CDB.CDB32, scmd->cmnd, scmd->cmd_len);
+                mpi_request->DevHandle =
+                    cpu_to_le16(sas_device_priv_data->sas_target->handle);
+                mpt2sas_base_put_smid_scsi_io(ioc, smid,
+                    sas_device_priv_data->sas_target->handle);
+                return 0;
+        }
+
 
         /* turning off TLR */
         scsi_state = mpi_reply->SCSIState;
@@ -3848,7 +4201,10 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
                     le32_to_cpu(mpi_reply->ResponseInfo) & 0xFF;
         if (!sas_device_priv_data->tlr_snoop_check) {
                 sas_device_priv_data->tlr_snoop_check++;
-        if (!_scsih_is_raid(&scmd->device->sdev_gendev) &&
+        /* Make sure Device is not raid volume.
+         * We do not expose raid functionality to upper layer for warpdrive.
+         */
+        if (!ioc->is_warpdrive && !_scsih_is_raid(&scmd->device->sdev_gendev) &&
                 sas_is_tlr_enabled(scmd->device) &&
                     response_code == MPI2_SCSITASKMGMT_RSP_INVALID_FRAME) {
                         sas_disable_tlr(scmd->device);
@@ -4681,8 +5037,10 @@ _scsih_remove_device(struct MPT2SAS_ADAPTER *ioc,
 
         _scsih_ublock_io_device(ioc, sas_device_backup.handle);
 
-        mpt2sas_transport_port_remove(ioc, sas_device_backup.sas_address,
-            sas_device_backup.sas_address_parent);
+        if (!ioc->hide_drives)
+                mpt2sas_transport_port_remove(ioc,
+                    sas_device_backup.sas_address,
+                    sas_device_backup.sas_address_parent);
 
         printk(MPT2SAS_INFO_FMT "removing handle(0x%04x), sas_addr"
             "(0x%016llx)\n", ioc->name, sas_device_backup.handle,
@@ -5413,6 +5771,7 @@ _scsih_sas_pd_hide(struct MPT2SAS_ADAPTER *ioc,
             &sas_device->volume_wwid);
         set_bit(handle, ioc->pd_handles);
         _scsih_reprobe_target(sas_device->starget, 1);
+
 }
 
 /**
@@ -5591,7 +5950,8 @@ _scsih_sas_ir_config_change_event(struct MPT2SAS_ADAPTER *ioc,
         Mpi2EventDataIrConfigChangeList_t *event_data = fw_event->event_data;
 
 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
-        if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
+        if ((ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
+            && !ioc->hide_ir_msg)
                 _scsih_sas_ir_config_change_event_debug(ioc, event_data);
 
 #endif
@@ -5614,16 +5974,20 @@ _scsih_sas_ir_config_change_event(struct MPT2SAS_ADAPTER *ioc,
                                     le16_to_cpu(element->VolDevHandle));
                         break;
                 case MPI2_EVENT_IR_CHANGE_RC_PD_CREATED:
-                        _scsih_sas_pd_hide(ioc, element);
+                        if (!ioc->is_warpdrive)
+                                _scsih_sas_pd_hide(ioc, element);
                         break;
                 case MPI2_EVENT_IR_CHANGE_RC_PD_DELETED:
-                        _scsih_sas_pd_expose(ioc, element);
+                        if (!ioc->is_warpdrive)
+                                _scsih_sas_pd_expose(ioc, element);
                         break;
                 case MPI2_EVENT_IR_CHANGE_RC_HIDE:
-                        _scsih_sas_pd_add(ioc, element);
+                        if (!ioc->is_warpdrive)
+                                _scsih_sas_pd_add(ioc, element);
                         break;
                 case MPI2_EVENT_IR_CHANGE_RC_UNHIDE:
-                        _scsih_sas_pd_delete(ioc, element);
+                        if (!ioc->is_warpdrive)
+                                _scsih_sas_pd_delete(ioc, element);
                         break;
                 }
         }
@@ -5654,9 +6018,10 @@ _scsih_sas_ir_volume_event(struct MPT2SAS_ADAPTER *ioc,
 
         handle = le16_to_cpu(event_data->VolDevHandle);
         state = le32_to_cpu(event_data->NewValue);
-        dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: handle(0x%04x), "
-            "old(0x%08x), new(0x%08x)\n", ioc->name, __func__,  handle,
-            le32_to_cpu(event_data->PreviousValue), state));
+        if (!ioc->hide_ir_msg)
+                dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: handle(0x%04x), "
+                    "old(0x%08x), new(0x%08x)\n", ioc->name, __func__,  handle,
+                    le32_to_cpu(event_data->PreviousValue), state));
 
         switch (state) {
         case MPI2_RAID_VOL_STATE_MISSING:
@@ -5736,9 +6101,10 @@ _scsih_sas_ir_physical_disk_event(struct MPT2SAS_ADAPTER *ioc,
         handle = le16_to_cpu(event_data->PhysDiskDevHandle);
         state = le32_to_cpu(event_data->NewValue);
 
-        dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: handle(0x%04x), "
-            "old(0x%08x), new(0x%08x)\n", ioc->name, __func__,  handle,
-            le32_to_cpu(event_data->PreviousValue), state));
+        if (!ioc->hide_ir_msg)
+                dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: handle(0x%04x), "
+                    "old(0x%08x), new(0x%08x)\n", ioc->name, __func__,  handle,
+                    le32_to_cpu(event_data->PreviousValue), state));
 
         switch (state) {
         case MPI2_RAID_PD_STATE_ONLINE:
@@ -5747,7 +6113,8 @@ _scsih_sas_ir_physical_disk_event(struct MPT2SAS_ADAPTER *ioc,
         case MPI2_RAID_PD_STATE_OPTIMAL:
         case MPI2_RAID_PD_STATE_HOT_SPARE:
 
-                set_bit(handle, ioc->pd_handles);
+                if (!ioc->is_warpdrive)
+                        set_bit(handle, ioc->pd_handles);
 
                 spin_lock_irqsave(&ioc->sas_device_lock, flags);
                 sas_device = _scsih_sas_device_find_by_handle(ioc, handle);
@@ -5851,7 +6218,8 @@ _scsih_sas_ir_operation_status_event(struct MPT2SAS_ADAPTER *ioc,
         u16 handle;
 
 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
-        if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
+        if ((ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
+            && !ioc->hide_ir_msg)
                 _scsih_sas_ir_operation_status_event_debug(ioc,
                      event_data);
 #endif
@@ -5910,7 +6278,7 @@ static void
 _scsih_mark_responding_sas_device(struct MPT2SAS_ADAPTER *ioc, u64 sas_address,
     u16 slot, u16 handle)
 {
-        struct MPT2SAS_TARGET *sas_target_priv_data;
+        struct MPT2SAS_TARGET *sas_target_priv_data = NULL;
         struct scsi_target *starget;
         struct _sas_device *sas_device;
         unsigned long flags;
@@ -5918,7 +6286,7 @@ _scsih_mark_responding_sas_device(struct MPT2SAS_ADAPTER *ioc, u64 sas_address,
         spin_lock_irqsave(&ioc->sas_device_lock, flags);
         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
                 if (sas_device->sas_address == sas_address &&
-                    sas_device->slot == slot && sas_device->starget) {
+                    sas_device->slot == slot) {
                         sas_device->responding = 1;
                         starget = sas_device->starget;
                         if (starget && starget->hostdata) {
@@ -5927,13 +6295,15 @@ _scsih_mark_responding_sas_device(struct MPT2SAS_ADAPTER *ioc, u64 sas_address,
                                 sas_target_priv_data->deleted = 0;
                         } else
                                 sas_target_priv_data = NULL;
-                        starget_printk(KERN_INFO, sas_device->starget,
-                            "handle(0x%04x), sas_addr(0x%016llx), enclosure "
-                            "logical id(0x%016llx), slot(%d)\n", handle,
-                            (unsigned long long)sas_device->sas_address,
-                            (unsigned long long)
-                            sas_device->enclosure_logical_id,
-                            sas_device->slot);
+                        if (starget)
+                                starget_printk(KERN_INFO, starget,
+                                    "handle(0x%04x), sas_addr(0x%016llx), "
+                                    "enclosure logical id(0x%016llx), "
+                                    "slot(%d)\n", handle,
+                                    (unsigned long long)sas_device->sas_address,
+                                    (unsigned long long)
+                                    sas_device->enclosure_logical_id,
+                                    sas_device->slot);
                         if (sas_device->handle == handle)
                                 goto out;
                         printk(KERN_INFO "\thandle changed from(0x%04x)!!!\n",
@@ -6025,6 +6395,12 @@ _scsih_mark_responding_raid_device(struct MPT2SAS_ADAPTER *ioc, u64 wwid,
                         starget_printk(KERN_INFO, raid_device->starget,
                             "handle(0x%04x), wwid(0x%016llx)\n", handle,
                             (unsigned long long)raid_device->wwid);
+                        /*
+                         * WARPDRIVE: The handles of the PDs might have changed
+                         * across the host reset so re-initialize the
+                         * required data for Direct IO
+                         */
+                        _scsih_init_warpdrive_properties(ioc, raid_device);
                         if (raid_device->handle == handle)
                                 goto out;
                         printk(KERN_INFO "\thandle changed from(0x%04x)!!!\n",
@@ -6086,18 +6462,20 @@ _scsih_search_responding_raid_devices(struct MPT2SAS_ADAPTER *ioc)
         }
 
         /* refresh the pd_handles */
-        phys_disk_num = 0xFF;
-        memset(ioc->pd_handles, 0, ioc->pd_handles_sz);
-        while (!(mpt2sas_config_get_phys_disk_pg0(ioc, &mpi_reply,
-            &pd_pg0, MPI2_PHYSDISK_PGAD_FORM_GET_NEXT_PHYSDISKNUM,
-            phys_disk_num))) {
-                ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
-                    MPI2_IOCSTATUS_MASK;
-                if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
-                        break;
-                phys_disk_num = pd_pg0.PhysDiskNum;
-                handle = le16_to_cpu(pd_pg0.DevHandle);
-                set_bit(handle, ioc->pd_handles);
+        if (!ioc->is_warpdrive) {
+                phys_disk_num = 0xFF;
+                memset(ioc->pd_handles, 0, ioc->pd_handles_sz);
+                while (!(mpt2sas_config_get_phys_disk_pg0(ioc, &mpi_reply,
+                    &pd_pg0, MPI2_PHYSDISK_PGAD_FORM_GET_NEXT_PHYSDISKNUM,
+                    phys_disk_num))) {
+                        ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
+                            MPI2_IOCSTATUS_MASK;
+                        if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
+                                break;
+                        phys_disk_num = pd_pg0.PhysDiskNum;
+                        handle = le16_to_cpu(pd_pg0.DevHandle);
+                        set_bit(handle, ioc->pd_handles);
+                }
         }
 }
 
@@ -6243,6 +6621,50 @@ _scsih_remove_unresponding_sas_devices(struct MPT2SAS_ADAPTER *ioc)
 }
 
 /**
+ * _scsih_hide_unhide_sas_devices - add/remove device to/from OS
+ * @ioc: per adapter object
+ *
+ * Return nothing.
+ */
+static void
+_scsih_hide_unhide_sas_devices(struct MPT2SAS_ADAPTER *ioc)
+{
+        struct _sas_device *sas_device, *sas_device_next;
+
+        if (!ioc->is_warpdrive || ioc->mfg_pg10_hide_flag !=
+            MFG_PAGE10_HIDE_IF_VOL_PRESENT)
+                return;
+
+        if (ioc->hide_drives) {
+                if (_scsih_get_num_volumes(ioc))
+                        return;
+                ioc->hide_drives = 0;
+                list_for_each_entry_safe(sas_device, sas_device_next,
+                    &ioc->sas_device_list, list) {
+                        if (!mpt2sas_transport_port_add(ioc, sas_device->handle,
+                                sas_device->sas_address_parent)) {
+                                _scsih_sas_device_remove(ioc, sas_device);
+                        } else if (!sas_device->starget) {
+                                mpt2sas_transport_port_remove(ioc,
+                                    sas_device->sas_address,
+                                    sas_device->sas_address_parent);
+                                _scsih_sas_device_remove(ioc, sas_device);
+                        }
+                }
+        } else {
+                if (!_scsih_get_num_volumes(ioc))
+                        return;
+                ioc->hide_drives = 1;
+                list_for_each_entry_safe(sas_device, sas_device_next,
+                    &ioc->sas_device_list, list) {
+                        mpt2sas_transport_port_remove(ioc,
+                            sas_device->sas_address,
+                            sas_device->sas_address_parent);
+                }
+        }
+}
+
+/**
  * mpt2sas_scsih_reset_handler - reset callback handler (for scsih)
  * @ioc: per adapter object
  * @reset_phase: phase
@@ -6326,6 +6748,7 @@ _firmware_event_work(struct work_struct *work)
                         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock,
                             flags);
                 _scsih_remove_unresponding_sas_devices(ioc);
+                _scsih_hide_unhide_sas_devices(ioc);
                 return;
         }
 
@@ -6425,6 +6848,53 @@ mpt2sas_scsih_event_callback(struct MPT2SAS_ADAPTER *ioc, u8 msix_index,
                     (Mpi2EventDataIrVolume_t *)
                     mpi_reply->EventData);
                 break;
+        case MPI2_EVENT_LOG_ENTRY_ADDED:
+        {
+                Mpi2EventDataLogEntryAdded_t *log_entry;
+                u32 *log_code;
+
+                if (!ioc->is_warpdrive)
+                        break;
+
+                log_entry = (Mpi2EventDataLogEntryAdded_t *)
+                    mpi_reply->EventData;
+                log_code = (u32 *)log_entry->LogData;
+
+                if (le16_to_cpu(log_entry->LogEntryQualifier)
+                    != MPT2_WARPDRIVE_LOGENTRY)
+                        break;
+
+                switch (le32_to_cpu(*log_code)) {
+                case MPT2_WARPDRIVE_LC_SSDT:
+                        printk(MPT2SAS_WARN_FMT "WarpDrive Warning: "
+                            "IO Throttling has occurred in the WarpDrive "
+                            "subsystem. Check WarpDrive documentation for "
+                            "additional details.\n", ioc->name);
+                        break;
+                case MPT2_WARPDRIVE_LC_SSDLW:
+                        printk(MPT2SAS_WARN_FMT "WarpDrive Warning: "
+                            "Program/Erase Cycles for the WarpDrive subsystem "
+                            "in degraded range. Check WarpDrive documentation "
+                            "for additional details.\n", ioc->name);
+                        break;
+                case MPT2_WARPDRIVE_LC_SSDLF:
+                        printk(MPT2SAS_ERR_FMT "WarpDrive Fatal Error: "
+                            "There are no Program/Erase Cycles for the "
+                            "WarpDrive subsystem. The storage device will be "
+                            "in read-only mode. Check WarpDrive documentation "
+                            "for additional details.\n", ioc->name);
+                        break;
+                case MPT2_WARPDRIVE_LC_BRMF:
+                        printk(MPT2SAS_ERR_FMT "WarpDrive Fatal Error: "
+                            "The Backup Rail Monitor has failed on the "
+                            "WarpDrive subsystem. Check WarpDrive "
+                            "documentation for additional details.\n",
+                            ioc->name);
+                        break;
+                }
+
+                break;
+        }
         case MPI2_EVENT_SAS_DEVICE_STATUS_CHANGE:
         case MPI2_EVENT_IR_OPERATION_STATUS:
         case MPI2_EVENT_SAS_DISCOVERY:
@@ -6583,7 +7053,8 @@ _scsih_ir_shutdown(struct MPT2SAS_ADAPTER *ioc)
         mpi_request->Function = MPI2_FUNCTION_RAID_ACTION;
         mpi_request->Action = MPI2_RAID_ACTION_SYSTEM_SHUTDOWN_INITIATED;
 
-        printk(MPT2SAS_INFO_FMT "IR shutdown (sending)\n", ioc->name);
+        if (!ioc->hide_ir_msg)
+                printk(MPT2SAS_INFO_FMT "IR shutdown (sending)\n", ioc->name);
         init_completion(&ioc->scsih_cmds.done);
         mpt2sas_base_put_smid_default(ioc, smid);
         wait_for_completion_timeout(&ioc->scsih_cmds.done, 10*HZ);
@@ -6597,10 +7068,11 @@ _scsih_ir_shutdown(struct MPT2SAS_ADAPTER *ioc)
         if (ioc->scsih_cmds.status & MPT2_CMD_REPLY_VALID) {
                 mpi_reply = ioc->scsih_cmds.reply;
 
-                printk(MPT2SAS_INFO_FMT "IR shutdown (complete): "
-                    "ioc_status(0x%04x), loginfo(0x%08x)\n",
-                    ioc->name, le16_to_cpu(mpi_reply->IOCStatus),
-                    le32_to_cpu(mpi_reply->IOCLogInfo));
+                if (!ioc->hide_ir_msg)
+                        printk(MPT2SAS_INFO_FMT "IR shutdown (complete): "
+                            "ioc_status(0x%04x), loginfo(0x%08x)\n",
+                            ioc->name, le16_to_cpu(mpi_reply->IOCStatus),
+                            le32_to_cpu(mpi_reply->IOCLogInfo));
         }
 
  out:
@@ -6759,6 +7231,9 @@ _scsih_probe_boot_devices(struct MPT2SAS_ADAPTER *ioc)
                 spin_lock_irqsave(&ioc->sas_device_lock, flags);
                 list_move_tail(&sas_device->list, &ioc->sas_device_list);
                 spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+
+                if (ioc->hide_drives)
+                        return;
                 if (!mpt2sas_transport_port_add(ioc, sas_device->handle,
                     sas_device->sas_address_parent)) {
                         _scsih_sas_device_remove(ioc, sas_device);
@@ -6812,6 +7287,9 @@ _scsih_probe_sas(struct MPT2SAS_ADAPTER *ioc)
                 list_move_tail(&sas_device->list, &ioc->sas_device_list);
                 spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
 
+                if (ioc->hide_drives)
+                        continue;
+
                 if (!mpt2sas_transport_port_add(ioc, sas_device->handle,
                     sas_device->sas_address_parent)) {
                         _scsih_sas_device_remove(ioc, sas_device);
@@ -6882,6 +7360,11 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         ioc->id = mpt_ids++;
         sprintf(ioc->name, "%s%d", MPT2SAS_DRIVER_NAME, ioc->id);
         ioc->pdev = pdev;
+        if (id->device == MPI2_MFGPAGE_DEVID_SSS6200) {
+                ioc->is_warpdrive = 1;
+                ioc->hide_ir_msg = 1;
+        } else
+                ioc->mfg_pg10_hide_flag = MFG_PAGE10_EXPOSE_ALL_DISKS;
         ioc->scsi_io_cb_idx = scsi_io_cb_idx;
         ioc->tm_cb_idx = tm_cb_idx;
         ioc->ctl_cb_idx = ctl_cb_idx;
@@ -6947,6 +7430,20 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         }
 
         ioc->wait_for_port_enable_to_complete = 0;
+        if (ioc->is_warpdrive) {
+                if (ioc->mfg_pg10_hide_flag ==  MFG_PAGE10_EXPOSE_ALL_DISKS)
+                        ioc->hide_drives = 0;
+                else if (ioc->mfg_pg10_hide_flag ==  MFG_PAGE10_HIDE_ALL_DISKS)
+                        ioc->hide_drives = 1;
+                else {
+                        if (_scsih_get_num_volumes(ioc))
+                                ioc->hide_drives = 1;
+                        else
+                                ioc->hide_drives = 0;
+                }
+        } else
+                ioc->hide_drives = 0;
+
         _scsih_probe_devices(ioc);
         return 0;