[SCSI] mpt2sas v00.100.11.15

* This is new scsi lld device driver from LSI supporting the SAS 2.0
  standard. I have split patchs by filename.

* Here is list of new 6gb host controllers:

  LSI SAS2004
  LSI SAS2008
  LSI SAS2108
  LSI SAS2116

* Here are the changes in the 4th posting of this patch set:

(1) fix compile errors when SCSI_MPT2SAS_LOGGING is not enabled
(2) add mpt2sas to the SCSI Mid Layer Makefile
(3) append mpt2sas_ to the naming of all non-static functions
(4) fix oops for SMP_PASSTHRU
(5) doorbell algorithm imported changes from windows driver

* Here are the changes in the 3rd posting of this patch set:

(1) add readl following writel from the function that disables interrupts
(2) replace 0xFFFFFFFFFFFFFFFFULL with ~0ULL
(3) when calling pci_enable_msix, only pass one msix entry (instead of 15).
(4) remove the "current HW implementation uses..... " comment in the sources
(5) merged bug fix for SIGIO/POLLIN notifcation; reported by the storlib team.

* Here are the changes in the 2nd posting of this patch set:

(1) use little endian types in the mpi headers
(2) merged in bug fix's from inhouse drivers.

Signed-off-by: Eric Moore <eric.moore@lsi.com>
Tested-by: peter Bogdanovic <pbog@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

20 files changed, 21993 insertions, 0 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index e420ad0acebf..e2f44e6c0bcb 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -571,6 +571,7 @@ config SCSI_ARCMSR_AER
 	  To enable this function, choose Y here.
 
 source "drivers/scsi/megaraid/Kconfig.megaraid"
+source "drivers/scsi/mpt2sas/Kconfig"
 
 config SCSI_HPTIOP
 	tristate "HighPoint RocketRAID 3xxx/4xxx Controller support"
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 05558b170419..cf7929634668 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -99,6 +99,7 @@ obj-$(CONFIG_SCSI_DC390T)	+= tmscsim.o
 obj-$(CONFIG_MEGARAID_LEGACY)	+= megaraid.o
 obj-$(CONFIG_MEGARAID_NEWGEN)	+= megaraid/
 obj-$(CONFIG_MEGARAID_SAS)	+= megaraid/
+obj-$(CONFIG_SCSI_MPT2SAS)	+= mpt2sas/
 obj-$(CONFIG_SCSI_ACARD)	+= atp870u.o
 obj-$(CONFIG_SCSI_SUNESP)	+= esp_scsi.o	sun_esp.o
 obj-$(CONFIG_SCSI_GDTH)		+= gdth.o
diff --git a/drivers/scsi/mpt2sas/Kconfig b/drivers/scsi/mpt2sas/Kconfig
new file mode 100644
index 000000000000..4a86855c23b3
--- /dev/null
+++ b/drivers/scsi/mpt2sas/Kconfig
@@ -0,0 +1,66 @@
+#
+# Kernel configuration file for the MPT2SAS
+#
+# This code is based on drivers/scsi/mpt2sas/Kconfig
+# Copyright (C) 2007-2008  LSI Corporation
+#  (mailto:DL-MPTFusionLinux@lsi.com)
+
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# NO WARRANTY
+# THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
+# LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
+# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
+# solely responsible for determining the appropriateness of using and
+# distributing the Program and assumes all risks associated with its
+# exercise of rights under this Agreement, including but not limited to
+# the risks and costs of program errors, damage to or loss of data,
+# programs or equipment, and unavailability or interruption of operations.
+
+# DISCLAIMER OF LIABILITY
+# NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+# USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
+# HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
+# USA.
+
+config SCSI_MPT2SAS
+	tristate "LSI MPT Fusion SAS 2.0 Device Driver"
+	depends on PCI && SCSI
+	select SCSI_SAS_ATTRS
+	---help---
+	This driver supports PCI-Express SAS 6Gb/s Host Adapters.
+
+config SCSI_MPT2SAS_MAX_SGE
+	int "LSI MPT Fusion Max number of SG Entries (16 - 128)"
+	depends on PCI && SCSI && SCSI_MPT2SAS
+	default "128"
+	range 16 128
+	---help---
+	This option allows you to specify the maximum number of scatter-
+	gather entries per I/O. The driver default is 128, which matches
+	SAFE_PHYS_SEGMENTS.  However, it may decreased down to 16.
+	Decreasing this parameter will reduce memory requirements
+	on a per controller instance.
+
+config SCSI_MPT2SAS_LOGGING
+	bool "LSI MPT Fusion logging facility"
+	depends on PCI && SCSI && SCSI_MPT2SAS
+	---help---
+	This turns on a logging facility.
diff --git a/drivers/scsi/mpt2sas/Makefile b/drivers/scsi/mpt2sas/Makefile
new file mode 100644
index 000000000000..728f0475711d
--- /dev/null
+++ b/drivers/scsi/mpt2sas/Makefile
@@ -0,0 +1,7 @@
+# mpt2sas makefile
+obj-$(CONFIG_SCSI_MPT2SAS) += mpt2sas.o
+mpt2sas-y +=  mpt2sas_base.o        \
+		mpt2sas_config.o    \
+		mpt2sas_scsih.o     \
+		mpt2sas_transport.o \
+		mpt2sas_ctl.o
diff --git a/drivers/scsi/mpt2sas/mpi/mpi2.h b/drivers/scsi/mpt2sas/mpi/mpi2.h
new file mode 100644
index 000000000000..7bb2ece8b2e4
--- /dev/null
+++ b/drivers/scsi/mpt2sas/mpi/mpi2.h
@@ -0,0 +1,1067 @@
+/*
+ *  Copyright (c) 2000-2009 LSI Corporation.
+ *
+ *
+ *           Name:  mpi2.h
+ *          Title:  MPI Message independent structures and definitions
+ *                  including System Interface Register Set and
+ *                  scatter/gather formats.
+ *  Creation Date:  June 21, 2006
+ *
+ *  mpi2.h Version:  02.00.11
+ *
+ *  Version History
+ *  ---------------
+ *
+ *  Date      Version   Description
+ *  --------  --------  ------------------------------------------------------
+ *  04-30-07  02.00.00  Corresponds to Fusion-MPT MPI Specification Rev A.
+ *  06-04-07  02.00.01  Bumped MPI2_HEADER_VERSION_UNIT.
+ *  06-26-07  02.00.02  Bumped MPI2_HEADER_VERSION_UNIT.
+ *  08-31-07  02.00.03  Bumped MPI2_HEADER_VERSION_UNIT.
+ *                      Moved ReplyPostHostIndex register to offset 0x6C of the
+ *                      MPI2_SYSTEM_INTERFACE_REGS and modified the define for
+ *                      MPI2_REPLY_POST_HOST_INDEX_OFFSET.
+ *                      Added union of request descriptors.
+ *                      Added union of reply descriptors.
+ *  10-31-07  02.00.04  Bumped MPI2_HEADER_VERSION_UNIT.
+ *                      Added define for MPI2_VERSION_02_00.
+ *                      Fixed the size of the FunctionDependent5 field in the
+ *                      MPI2_DEFAULT_REPLY structure.
+ *  12-18-07  02.00.05  Bumped MPI2_HEADER_VERSION_UNIT.
+ *                      Removed the MPI-defined Fault Codes and extended the
+ *                      product specific codes up to 0xEFFF.
+ *                      Added a sixth key value for the WriteSequence register
+ *                      and changed the flush value to 0x0.
+ *                      Added message function codes for Diagnostic Buffer Post
+ *                      and Diagnsotic Release.
+ *                      New IOCStatus define: MPI2_IOCSTATUS_DIAGNOSTIC_RELEASED
+ *                      Moved MPI2_VERSION_UNION from mpi2_ioc.h.
+ *  02-29-08  02.00.06  Bumped MPI2_HEADER_VERSION_UNIT.
+ *  03-03-08  02.00.07  Bumped MPI2_HEADER_VERSION_UNIT.
+ *  05-21-08  02.00.08  Bumped MPI2_HEADER_VERSION_UNIT.
+ *                      Added #defines for marking a reply descriptor as unused.
+ *  06-27-08  02.00.09  Bumped MPI2_HEADER_VERSION_UNIT.
+ *  10-02-08  02.00.10  Bumped MPI2_HEADER_VERSION_UNIT.
+ *                      Moved LUN field defines from mpi2_init.h.
+ *  01-19-09  02.00.11  Bumped MPI2_HEADER_VERSION_UNIT.
+ *  --------------------------------------------------------------------------
+ */
+
+#ifndef MPI2_H
+#define MPI2_H
+
+
+/*****************************************************************************
+*
+*        MPI Version Definitions
+*
+*****************************************************************************/
+
+#define MPI2_VERSION_MAJOR                  (0x02)
+#define MPI2_VERSION_MINOR                  (0x00)
+#define MPI2_VERSION_MAJOR_MASK             (0xFF00)
+#define MPI2_VERSION_MAJOR_SHIFT            (8)
+#define MPI2_VERSION_MINOR_MASK             (0x00FF)
+#define MPI2_VERSION_MINOR_SHIFT            (0)
+#define MPI2_VERSION ((MPI2_VERSION_MAJOR << MPI2_VERSION_MAJOR_SHIFT) |   \
+                                      MPI2_VERSION_MINOR)
+
+#define MPI2_VERSION_02_00                  (0x0200)
+
+/* versioning for this MPI header set */
+#define MPI2_HEADER_VERSION_UNIT            (0x0B)
+#define MPI2_HEADER_VERSION_DEV             (0x00)
+#define MPI2_HEADER_VERSION_UNIT_MASK       (0xFF00)
+#define MPI2_HEADER_VERSION_UNIT_SHIFT      (8)
+#define MPI2_HEADER_VERSION_DEV_MASK        (0x00FF)
+#define MPI2_HEADER_VERSION_DEV_SHIFT       (0)
+#define MPI2_HEADER_VERSION ((MPI2_HEADER_VERSION_UNIT << 8) | MPI2_HEADER_VERSION_DEV)
+
+
+/*****************************************************************************
+*
+*        IOC State Definitions
+*
+*****************************************************************************/
+
+#define MPI2_IOC_STATE_RESET               (0x00000000)
+#define MPI2_IOC_STATE_READY               (0x10000000)
+#define MPI2_IOC_STATE_OPERATIONAL         (0x20000000)
+#define MPI2_IOC_STATE_FAULT               (0x40000000)
+
+#define MPI2_IOC_STATE_MASK                (0xF0000000)
+#define MPI2_IOC_STATE_SHIFT               (28)
+
+/* Fault state range for prodcut specific codes */
+#define MPI2_FAULT_PRODUCT_SPECIFIC_MIN                 (0x0000)
+#define MPI2_FAULT_PRODUCT_SPECIFIC_MAX                 (0xEFFF)
+
+
+/*****************************************************************************
+*
+*        System Interface Register Definitions
+*
+*****************************************************************************/
+
+typedef volatile struct _MPI2_SYSTEM_INTERFACE_REGS
+{
+    U32         Doorbell;                   /* 0x00 */
+    U32         WriteSequence;              /* 0x04 */
+    U32         HostDiagnostic;             /* 0x08 */
+    U32         Reserved1;                  /* 0x0C */
+    U32         DiagRWData;                 /* 0x10 */
+    U32         DiagRWAddressLow;           /* 0x14 */
+    U32         DiagRWAddressHigh;          /* 0x18 */
+    U32         Reserved2[5];               /* 0x1C */
+    U32         HostInterruptStatus;        /* 0x30 */
+    U32         HostInterruptMask;          /* 0x34 */
+    U32         DCRData;                    /* 0x38 */
+    U32         DCRAddress;                 /* 0x3C */
+    U32         Reserved3[2];               /* 0x40 */
+    U32         ReplyFreeHostIndex;         /* 0x48 */
+    U32         Reserved4[8];               /* 0x4C */
+    U32         ReplyPostHostIndex;         /* 0x6C */
+    U32         Reserved5;                  /* 0x70 */
+    U32         HCBSize;                    /* 0x74 */
+    U32         HCBAddressLow;              /* 0x78 */
+    U32         HCBAddressHigh;             /* 0x7C */
+    U32         Reserved6[16];              /* 0x80 */
+    U32         RequestDescriptorPostLow;   /* 0xC0 */
+    U32         RequestDescriptorPostHigh;  /* 0xC4 */
+    U32         Reserved7[14];              /* 0xC8 */
+} MPI2_SYSTEM_INTERFACE_REGS, MPI2_POINTER PTR_MPI2_SYSTEM_INTERFACE_REGS,
+  Mpi2SystemInterfaceRegs_t, MPI2_POINTER pMpi2SystemInterfaceRegs_t;
+
+/*
+ * Defines for working with the Doorbell register.
+ */
+#define MPI2_DOORBELL_OFFSET                    (0x00000000)
+
+/* IOC --> System values */
+#define MPI2_DOORBELL_USED                      (0x08000000)
+#define MPI2_DOORBELL_WHO_INIT_MASK             (0x07000000)
+#define MPI2_DOORBELL_WHO_INIT_SHIFT            (24)
+#define MPI2_DOORBELL_FAULT_CODE_MASK           (0x0000FFFF)
+#define MPI2_DOORBELL_DATA_MASK                 (0x0000FFFF)
+
+/* System --> IOC values */
+#define MPI2_DOORBELL_FUNCTION_MASK             (0xFF000000)
+#define MPI2_DOORBELL_FUNCTION_SHIFT            (24)
+#define MPI2_DOORBELL_ADD_DWORDS_MASK           (0x00FF0000)
+#define MPI2_DOORBELL_ADD_DWORDS_SHIFT          (16)
+
+
+/*
+ * Defines for the WriteSequence register
+ */
+#define MPI2_WRITE_SEQUENCE_OFFSET              (0x00000004)
+#define MPI2_WRSEQ_KEY_VALUE_MASK               (0x0000000F)
+#define MPI2_WRSEQ_FLUSH_KEY_VALUE              (0x0)
+#define MPI2_WRSEQ_1ST_KEY_VALUE                (0xF)
+#define MPI2_WRSEQ_2ND_KEY_VALUE                (0x4)
+#define MPI2_WRSEQ_3RD_KEY_VALUE                (0xB)
+#define MPI2_WRSEQ_4TH_KEY_VALUE                (0x2)
+#define MPI2_WRSEQ_5TH_KEY_VALUE                (0x7)
+#define MPI2_WRSEQ_6TH_KEY_VALUE                (0xD)
+
+/*
+ * Defines for the HostDiagnostic register
+ */
+#define MPI2_HOST_DIAGNOSTIC_OFFSET             (0x00000008)
+
+#define MPI2_DIAG_BOOT_DEVICE_SELECT_MASK       (0x00001800)
+#define MPI2_DIAG_BOOT_DEVICE_SELECT_DEFAULT    (0x00000000)
+#define MPI2_DIAG_BOOT_DEVICE_SELECT_HCDW       (0x00000800)
+
+#define MPI2_DIAG_CLEAR_FLASH_BAD_SIG           (0x00000400)
+#define MPI2_DIAG_FORCE_HCB_ON_RESET            (0x00000200)
+#define MPI2_DIAG_HCB_MODE                      (0x00000100)
+#define MPI2_DIAG_DIAG_WRITE_ENABLE             (0x00000080)
+#define MPI2_DIAG_FLASH_BAD_SIG                 (0x00000040)
+#define MPI2_DIAG_RESET_HISTORY                 (0x00000020)
+#define MPI2_DIAG_DIAG_RW_ENABLE                (0x00000010)
+#define MPI2_DIAG_RESET_ADAPTER                 (0x00000004)
+#define MPI2_DIAG_HOLD_IOC_RESET                (0x00000002)
+
+/*
+ * Offsets for DiagRWData and address
+ */
+#define MPI2_DIAG_RW_DATA_OFFSET                (0x00000010)
+#define MPI2_DIAG_RW_ADDRESS_LOW_OFFSET         (0x00000014)
+#define MPI2_DIAG_RW_ADDRESS_HIGH_OFFSET        (0x00000018)
+
+/*
+ * Defines for the HostInterruptStatus register
+ */
+#define MPI2_HOST_INTERRUPT_STATUS_OFFSET       (0x00000030)
+#define MPI2_HIS_SYS2IOC_DB_STATUS              (0x80000000)
+#define MPI2_HIS_IOP_DOORBELL_STATUS            MPI2_HIS_SYS2IOC_DB_STATUS
+#define MPI2_HIS_RESET_IRQ_STATUS               (0x40000000)
+#define MPI2_HIS_REPLY_DESCRIPTOR_INTERRUPT     (0x00000008)
+#define MPI2_HIS_IOC2SYS_DB_STATUS              (0x00000001)
+#define MPI2_HIS_DOORBELL_INTERRUPT             MPI2_HIS_IOC2SYS_DB_STATUS
+
+/*
+ * Defines for the HostInterruptMask register
+ */
+#define MPI2_HOST_INTERRUPT_MASK_OFFSET         (0x00000034)
+#define MPI2_HIM_RESET_IRQ_MASK                 (0x40000000)
+#define MPI2_HIM_REPLY_INT_MASK                 (0x00000008)
+#define MPI2_HIM_RIM                            MPI2_HIM_REPLY_INT_MASK
+#define MPI2_HIM_IOC2SYS_DB_MASK                (0x00000001)
+#define MPI2_HIM_DIM                            MPI2_HIM_IOC2SYS_DB_MASK
+
+/*
+ * Offsets for DCRData and address
+ */
+#define MPI2_DCR_DATA_OFFSET                    (0x00000038)
+#define MPI2_DCR_ADDRESS_OFFSET                 (0x0000003C)
+
+/*
+ * Offset for the Reply Free Queue
+ */
+#define MPI2_REPLY_FREE_HOST_INDEX_OFFSET       (0x00000048)
+
+/*
+ * Offset for the Reply Descriptor Post Queue
+ */
+#define MPI2_REPLY_POST_HOST_INDEX_OFFSET       (0x0000006C)
+
+/*
+ * Defines for the HCBSize and address
+ */
+#define MPI2_HCB_SIZE_OFFSET                    (0x00000074)
+#define MPI2_HCB_SIZE_SIZE_MASK                 (0xFFFFF000)
+#define MPI2_HCB_SIZE_HCB_ENABLE                (0x00000001)
+
+#define MPI2_HCB_ADDRESS_LOW_OFFSET             (0x00000078)
+#define MPI2_HCB_ADDRESS_HIGH_OFFSET            (0x0000007C)
+
+/*
+ * Offsets for the Request Queue
+ */
+#define MPI2_REQUEST_DESCRIPTOR_POST_LOW_OFFSET     (0x000000C0)
+#define MPI2_REQUEST_DESCRIPTOR_POST_HIGH_OFFSET    (0x000000C4)
+
+
+/*****************************************************************************
+*
+*        Message Descriptors
+*
+*****************************************************************************/
+
+/* Request Descriptors */
+
+/* Default Request Descriptor */
+typedef struct _MPI2_DEFAULT_REQUEST_DESCRIPTOR
+{
+    U8              RequestFlags;               /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             SMID;                       /* 0x02 */
+    U16             LMID;                       /* 0x04 */
+    U16             DescriptorTypeDependent;    /* 0x06 */
+} MPI2_DEFAULT_REQUEST_DESCRIPTOR,
+  MPI2_POINTER PTR_MPI2_DEFAULT_REQUEST_DESCRIPTOR,
+  Mpi2DefaultRequestDescriptor_t, MPI2_POINTER pMpi2DefaultRequestDescriptor_t;
+
+/* defines for the RequestFlags field */
+#define MPI2_REQ_DESCRIPT_FLAGS_TYPE_MASK               (0x0E)
+#define MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO                 (0x00)
+#define MPI2_REQ_DESCRIPT_FLAGS_SCSI_TARGET             (0x02)
+#define MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY           (0x06)
+#define MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE            (0x08)
+
+#define MPI2_REQ_DESCRIPT_FLAGS_IOC_FIFO_MARKER (0x01)
+
+
+/* High Priority Request Descriptor */
+typedef struct _MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR
+{
+    U8              RequestFlags;               /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             SMID;                       /* 0x02 */
+    U16             LMID;                       /* 0x04 */
+    U16             Reserved1;                  /* 0x06 */
+} MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR,
+  MPI2_POINTER PTR_MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR,
+  Mpi2HighPriorityRequestDescriptor_t,
+  MPI2_POINTER pMpi2HighPriorityRequestDescriptor_t;
+
+
+/* SCSI IO Request Descriptor */
+typedef struct _MPI2_SCSI_IO_REQUEST_DESCRIPTOR
+{
+    U8              RequestFlags;               /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             SMID;                       /* 0x02 */
+    U16             LMID;                       /* 0x04 */
+    U16             DevHandle;                  /* 0x06 */
+} MPI2_SCSI_IO_REQUEST_DESCRIPTOR,
+  MPI2_POINTER PTR_MPI2_SCSI_IO_REQUEST_DESCRIPTOR,
+  Mpi2SCSIIORequestDescriptor_t, MPI2_POINTER pMpi2SCSIIORequestDescriptor_t;
+
+
+/* SCSI Target Request Descriptor */
+typedef struct _MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR
+{
+    U8              RequestFlags;               /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             SMID;                       /* 0x02 */
+    U16             LMID;                       /* 0x04 */
+    U16             IoIndex;                    /* 0x06 */
+} MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR,
+  MPI2_POINTER PTR_MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR,
+  Mpi2SCSITargetRequestDescriptor_t,
+  MPI2_POINTER pMpi2SCSITargetRequestDescriptor_t;
+
+/* union of Request Descriptors */
+typedef union _MPI2_REQUEST_DESCRIPTOR_UNION
+{
+    MPI2_DEFAULT_REQUEST_DESCRIPTOR         Default;
+    MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR   HighPriority;
+    MPI2_SCSI_IO_REQUEST_DESCRIPTOR         SCSIIO;
+    MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR     SCSITarget;
+    U64                                     Words;
+} MPI2_REQUEST_DESCRIPTOR_UNION, MPI2_POINTER PTR_MPI2_REQUEST_DESCRIPTOR_UNION,
+  Mpi2RequestDescriptorUnion_t, MPI2_POINTER pMpi2RequestDescriptorUnion_t;
+
+
+/* Reply Descriptors */
+
+/* Default Reply Descriptor */
+typedef struct _MPI2_DEFAULT_REPLY_DESCRIPTOR
+{
+    U8              ReplyFlags;                 /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             DescriptorTypeDependent1;   /* 0x02 */
+    U32             DescriptorTypeDependent2;   /* 0x04 */
+} MPI2_DEFAULT_REPLY_DESCRIPTOR, MPI2_POINTER PTR_MPI2_DEFAULT_REPLY_DESCRIPTOR,
+  Mpi2DefaultReplyDescriptor_t, MPI2_POINTER pMpi2DefaultReplyDescriptor_t;
+
+/* defines for the ReplyFlags field */
+#define MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK               (0x0F)
+#define MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS         (0x00)
+#define MPI2_RPY_DESCRIPT_FLAGS_ADDRESS_REPLY           (0x01)
+#define MPI2_RPY_DESCRIPT_FLAGS_TARGETASSIST_SUCCESS    (0x02)
+#define MPI2_RPY_DESCRIPT_FLAGS_TARGET_COMMAND_BUFFER   (0x03)
+#define MPI2_RPY_DESCRIPT_FLAGS_UNUSED                  (0x0F)
+
+/* values for marking a reply descriptor as unused */
+#define MPI2_RPY_DESCRIPT_UNUSED_WORD0_MARK             (0xFFFFFFFF)
+#define MPI2_RPY_DESCRIPT_UNUSED_WORD1_MARK             (0xFFFFFFFF)
+
+/* Address Reply Descriptor */
+typedef struct _MPI2_ADDRESS_REPLY_DESCRIPTOR
+{
+    U8              ReplyFlags;                 /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             SMID;                       /* 0x02 */
+    U32             ReplyFrameAddress;          /* 0x04 */
+} MPI2_ADDRESS_REPLY_DESCRIPTOR, MPI2_POINTER PTR_MPI2_ADDRESS_REPLY_DESCRIPTOR,
+  Mpi2AddressReplyDescriptor_t, MPI2_POINTER pMpi2AddressReplyDescriptor_t;
+
+#define MPI2_ADDRESS_REPLY_SMID_INVALID                 (0x00)
+
+
+/* SCSI IO Success Reply Descriptor */
+typedef struct _MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR
+{
+    U8              ReplyFlags;                 /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             SMID;                       /* 0x02 */
+    U16             TaskTag;                    /* 0x04 */
+    U16             DevHandle;                  /* 0x06 */
+} MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR,
+  MPI2_POINTER PTR_MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR,
+  Mpi2SCSIIOSuccessReplyDescriptor_t,
+  MPI2_POINTER pMpi2SCSIIOSuccessReplyDescriptor_t;
+
+
+/* TargetAssist Success Reply Descriptor */
+typedef struct _MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR
+{
+    U8              ReplyFlags;                 /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U16             SMID;                       /* 0x02 */
+    U8              SequenceNumber;             /* 0x04 */
+    U8              Reserved1;                  /* 0x05 */
+    U16             IoIndex;                    /* 0x06 */
+} MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR,
+  MPI2_POINTER PTR_MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR,
+  Mpi2TargetAssistSuccessReplyDescriptor_t,
+  MPI2_POINTER pMpi2TargetAssistSuccessReplyDescriptor_t;
+
+
+/* Target Command Buffer Reply Descriptor */
+typedef struct _MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR
+{
+    U8              ReplyFlags;                 /* 0x00 */
+    U8              VF_ID;                      /* 0x01 */
+    U8              VP_ID;                      /* 0x02 */
+    U8              Flags;                      /* 0x03 */
+    U16             InitiatorDevHandle;         /* 0x04 */
+    U16             IoIndex;                    /* 0x06 */
+} MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR,
+  MPI2_POINTER PTR_MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR,
+  Mpi2TargetCommandBufferReplyDescriptor_t,
+  MPI2_POINTER pMpi2TargetCommandBufferReplyDescriptor_t;
+
+/* defines for Flags field */
+#define MPI2_RPY_DESCRIPT_TCB_FLAGS_PHYNUM_MASK     (0x3F)
+
+
+/* union of Reply Descriptors */
+typedef union _MPI2_REPLY_DESCRIPTORS_UNION
+{
+    MPI2_DEFAULT_REPLY_DESCRIPTOR               Default;
+    MPI2_ADDRESS_REPLY_DESCRIPTOR               AddressReply;
+    MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR       SCSIIOSuccess;
+    MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR  TargetAssistSuccess;
+    MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR TargetCommandBuffer;
+    U64                                         Words;
+} MPI2_REPLY_DESCRIPTORS_UNION, MPI2_POINTER PTR_MPI2_REPLY_DESCRIPTORS_UNION,
+  Mpi2ReplyDescriptorsUnion_t, MPI2_POINTER pMpi2ReplyDescriptorsUnion_t;
+
+
+
+/*****************************************************************************
+*
+*        Message Functions
+*              0x80 -> 0x8F reserved for private message use per product
+*
+*
+*****************************************************************************/
+
+#define MPI2_FUNCTION_SCSI_IO_REQUEST               (0x00) /* SCSI IO */
+#define MPI2_FUNCTION_SCSI_TASK_MGMT                (0x01) /* SCSI Task Management */
+#define MPI2_FUNCTION_IOC_INIT                      (0x02) /* IOC Init */
+#define MPI2_FUNCTION_IOC_FACTS                     (0x03) /* IOC Facts */
+#define MPI2_FUNCTION_CONFIG                        (0x04) /* Configuration */
+#define MPI2_FUNCTION_PORT_FACTS                    (0x05) /* Port Facts */
+#define MPI2_FUNCTION_PORT_ENABLE                   (0x06) /* Port Enable */
+#define MPI2_FUNCTION_EVENT_NOTIFICATION            (0x07) /* Event Notification */
+#define MPI2_FUNCTION_EVENT_ACK                     (0x08) /* Event Acknowledge */
+#define MPI2_FUNCTION_FW_DOWNLOAD                   (0x09) /* FW Download */
+#define MPI2_FUNCTION_TARGET_ASSIST                 (0x0B) /* Target Assist */
+#define MPI2_FUNCTION_TARGET_STATUS_SEND            (0x0C) /* Target Status Send */
+#define MPI2_FUNCTION_TARGET_MODE_ABORT             (0x0D) /* Target Mode Abort */
+#define MPI2_FUNCTION_FW_UPLOAD                     (0x12) /* FW Upload */
+#define MPI2_FUNCTION_RAID_ACTION                   (0x15) /* RAID Action */
+#define MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH      (0x16) /* SCSI IO RAID Passthrough */
+#define MPI2_FUNCTION_TOOLBOX                       (0x17) /* Toolbox */
+#define MPI2_FUNCTION_SCSI_ENCLOSURE_PROCESSOR      (0x18) /* SCSI Enclosure Processor */
+#define MPI2_FUNCTION_SMP_PASSTHROUGH               (0x1A) /* SMP Passthrough */
+#define MPI2_FUNCTION_SAS_IO_UNIT_CONTROL           (0x1B) /* SAS IO Unit Control */
+#define MPI2_FUNCTION_SATA_PASSTHROUGH              (0x1C) /* SATA Passthrough */
+#define MPI2_FUNCTION_DIAG_BUFFER_POST              (0x1D) /* Diagnostic Buffer Post */
+#define MPI2_FUNCTION_DIAG_RELEASE                  (0x1E) /* Diagnostic Release */
+#define MPI2_FUNCTION_TARGET_CMD_BUF_BASE_POST      (0x24) /* Target Command Buffer Post Base */
+#define MPI2_FUNCTION_TARGET_CMD_BUF_LIST_POST      (0x25) /* Target Command Buffer Post List */
+
+
+
+/* Doorbell functions */
+#define MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET        (0x40)
+/* #define MPI2_FUNCTION_IO_UNIT_RESET                 (0x41) */
+#define MPI2_FUNCTION_HANDSHAKE                     (0x42)
+
+
+/*****************************************************************************
+*
+*        IOC Status Values
+*
+*****************************************************************************/
+
+/* mask for IOCStatus status value */
+#define MPI2_IOCSTATUS_MASK                     (0x7FFF)
+
+/****************************************************************************
+*  Common IOCStatus values for all replies
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_SUCCESS                      (0x0000)
+#define MPI2_IOCSTATUS_INVALID_FUNCTION             (0x0001)
+#define MPI2_IOCSTATUS_BUSY                         (0x0002)
+#define MPI2_IOCSTATUS_INVALID_SGL                  (0x0003)
+#define MPI2_IOCSTATUS_INTERNAL_ERROR               (0x0004)
+#define MPI2_IOCSTATUS_INVALID_VPID                 (0x0005)
+#define MPI2_IOCSTATUS_INSUFFICIENT_RESOURCES       (0x0006)
+#define MPI2_IOCSTATUS_INVALID_FIELD                (0x0007)
+#define MPI2_IOCSTATUS_INVALID_STATE                (0x0008)
+#define MPI2_IOCSTATUS_OP_STATE_NOT_SUPPORTED       (0x0009)
+
+/****************************************************************************
+*  Config IOCStatus values
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_CONFIG_INVALID_ACTION        (0x0020)
+#define MPI2_IOCSTATUS_CONFIG_INVALID_TYPE          (0x0021)
+#define MPI2_IOCSTATUS_CONFIG_INVALID_PAGE          (0x0022)
+#define MPI2_IOCSTATUS_CONFIG_INVALID_DATA          (0x0023)
+#define MPI2_IOCSTATUS_CONFIG_NO_DEFAULTS           (0x0024)
+#define MPI2_IOCSTATUS_CONFIG_CANT_COMMIT           (0x0025)
+
+/****************************************************************************
+*  SCSI IO Reply
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_SCSI_RECOVERED_ERROR         (0x0040)
+#define MPI2_IOCSTATUS_SCSI_INVALID_DEVHANDLE       (0x0042)
+#define MPI2_IOCSTATUS_SCSI_DEVICE_NOT_THERE        (0x0043)
+#define MPI2_IOCSTATUS_SCSI_DATA_OVERRUN            (0x0044)
+#define MPI2_IOCSTATUS_SCSI_DATA_UNDERRUN           (0x0045)
+#define MPI2_IOCSTATUS_SCSI_IO_DATA_ERROR           (0x0046)
+#define MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR          (0x0047)
+#define MPI2_IOCSTATUS_SCSI_TASK_TERMINATED         (0x0048)
+#define MPI2_IOCSTATUS_SCSI_RESIDUAL_MISMATCH       (0x0049)
+#define MPI2_IOCSTATUS_SCSI_TASK_MGMT_FAILED        (0x004A)
+#define MPI2_IOCSTATUS_SCSI_IOC_TERMINATED          (0x004B)
+#define MPI2_IOCSTATUS_SCSI_EXT_TERMINATED          (0x004C)
+
+/****************************************************************************
+*  For use by SCSI Initiator and SCSI Target end-to-end data protection
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_EEDP_GUARD_ERROR             (0x004D)
+#define MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR           (0x004E)
+#define MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR           (0x004F)
+
+/****************************************************************************
+*  SCSI Target values
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_TARGET_INVALID_IO_INDEX      (0x0062)
+#define MPI2_IOCSTATUS_TARGET_ABORTED               (0x0063)
+#define MPI2_IOCSTATUS_TARGET_NO_CONN_RETRYABLE     (0x0064)
+#define MPI2_IOCSTATUS_TARGET_NO_CONNECTION         (0x0065)
+#define MPI2_IOCSTATUS_TARGET_XFER_COUNT_MISMATCH   (0x006A)
+#define MPI2_IOCSTATUS_TARGET_DATA_OFFSET_ERROR     (0x006D)
+#define MPI2_IOCSTATUS_TARGET_TOO_MUCH_WRITE_DATA   (0x006E)
+#define MPI2_IOCSTATUS_TARGET_IU_TOO_SHORT          (0x006F)
+#define MPI2_IOCSTATUS_TARGET_ACK_NAK_TIMEOUT       (0x0070)
+#define MPI2_IOCSTATUS_TARGET_NAK_RECEIVED          (0x0071)
+
+/****************************************************************************
+*  Serial Attached SCSI values
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_SAS_SMP_REQUEST_FAILED       (0x0090)
+#define MPI2_IOCSTATUS_SAS_SMP_DATA_OVERRUN         (0x0091)
+
+/****************************************************************************
+*  Diagnostic Buffer Post / Diagnostic Release values
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_DIAGNOSTIC_RELEASED          (0x00A0)
+
+
+/****************************************************************************
+*  IOCStatus flag to indicate that log info is available
+****************************************************************************/
+
+#define MPI2_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE  (0x8000)
+
+/****************************************************************************
+*  IOCLogInfo Types
+****************************************************************************/
+
+#define MPI2_IOCLOGINFO_TYPE_MASK               (0xF0000000)
+#define MPI2_IOCLOGINFO_TYPE_SHIFT              (28)
+#define MPI2_IOCLOGINFO_TYPE_NONE               (0x0)
+#define MPI2_IOCLOGINFO_TYPE_SCSI               (0x1)
+#define MPI2_IOCLOGINFO_TYPE_FC                 (0x2)
+#define MPI2_IOCLOGINFO_TYPE_SAS                (0x3)
+#define MPI2_IOCLOGINFO_TYPE_ISCSI              (0x4)
+#define MPI2_IOCLOGINFO_LOG_DATA_MASK           (0x0FFFFFFF)
+
+
+/*****************************************************************************
+*
+*        Standard Message Structures
+*
+*****************************************************************************/
+
+/****************************************************************************
+* Request Message Header for all request messages
+****************************************************************************/
+
+typedef struct _MPI2_REQUEST_HEADER
+{
+    U16             FunctionDependent1;         /* 0x00 */
+    U8              ChainOffset;                /* 0x02 */
+    U8              Function;                   /* 0x03 */
+    U16             FunctionDependent2;         /* 0x04 */
+    U8              FunctionDependent3;         /* 0x06 */
+    U8              MsgFlags;                   /* 0x07 */
+    U8              VP_ID;                      /* 0x08 */
+    U8              VF_ID;                      /* 0x09 */
+    U16             Reserved1;                  /* 0x0A */
+} MPI2_REQUEST_HEADER, MPI2_POINTER PTR_MPI2_REQUEST_HEADER,
+  MPI2RequestHeader_t, MPI2_POINTER pMPI2RequestHeader_t;
+
+
+/****************************************************************************
+*  Default Reply
+****************************************************************************/
+
+typedef struct _MPI2_DEFAULT_REPLY
+{
+    U16             FunctionDependent1;         /* 0x00 */
+    U8              MsgLength;                  /* 0x02 */
+    U8              Function;                   /* 0x03 */
+    U16             FunctionDependent2;         /* 0x04 */
+    U8              FunctionDependent3;         /* 0x06 */
+    U8              MsgFlags;                   /* 0x07 */
+    U8              VP_ID;                      /* 0x08 */
+    U8              VF_ID;                      /* 0x09 */
+    U16             Reserved1;                  /* 0x0A */
+    U16             FunctionDependent5;         /* 0x0C */
+    U16             IOCStatus;                  /* 0x0E */
+    U32             IOCLogInfo;                 /* 0x10 */
+} MPI2_DEFAULT_REPLY, MPI2_POINTER PTR_MPI2_DEFAULT_REPLY,
+  MPI2DefaultReply_t, MPI2_POINTER pMPI2DefaultReply_t;
+
+