drivers/scsi/hpsa_cmd.h - kernel/msm-4.9 - Gitiles

 /*
  *    Disk Array driver for HP Smart Array SAS controllers
  *    Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
  *
  *    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; version 2 of the License.
  *
  *    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, GOOD TITLE or
  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  *
  *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  *    Questions/Comments/Bugfixes to iss_storagedev@hp.com
  *
  */
 #ifndef HPSA_CMD_H
 #define HPSA_CMD_H

 /* general boundary defintions */
 #define SENSEINFOBYTES          32 /* may vary between hbas */
 #define SG_ENTRIES_IN_CMD	32 /* Max SG entries excluding chain blocks */
 #define HPSA_SG_CHAIN		0x80000000
 #define MAXREPLYQS              256

 /* Command Status value */
 #define CMD_SUCCESS             0x0000
 #define CMD_TARGET_STATUS       0x0001
 #define CMD_DATA_UNDERRUN       0x0002
 #define CMD_DATA_OVERRUN        0x0003
 #define CMD_INVALID             0x0004
 #define CMD_PROTOCOL_ERR        0x0005
 #define CMD_HARDWARE_ERR        0x0006
 #define CMD_CONNECTION_LOST     0x0007
 #define CMD_ABORTED             0x0008
 #define CMD_ABORT_FAILED        0x0009
 #define CMD_UNSOLICITED_ABORT   0x000A
 #define CMD_TIMEOUT             0x000B
 #define CMD_UNABORTABLE		0x000C

 /* Unit Attentions ASC's as defined for the MSA2012sa */
 #define POWER_OR_RESET			0x29
 #define STATE_CHANGED			0x2a
 #define UNIT_ATTENTION_CLEARED		0x2f
 #define LUN_FAILED			0x3e
 #define REPORT_LUNS_CHANGED		0x3f

 /* Unit Attentions ASCQ's as defined for the MSA2012sa */

 	/* These ASCQ's defined for ASC = POWER_OR_RESET */
 #define POWER_ON_RESET			0x00
 #define POWER_ON_REBOOT			0x01
 #define SCSI_BUS_RESET			0x02
 #define MSA_TARGET_RESET		0x03
 #define CONTROLLER_FAILOVER		0x04
 #define TRANSCEIVER_SE			0x05
 #define TRANSCEIVER_LVD			0x06

 	/* These ASCQ's defined for ASC = STATE_CHANGED */
 #define RESERVATION_PREEMPTED		0x03
 #define ASYM_ACCESS_CHANGED		0x06
 #define LUN_CAPACITY_CHANGED		0x09

 /* transfer direction */
 #define XFER_NONE               0x00
 #define XFER_WRITE              0x01
 #define XFER_READ               0x02
 #define XFER_RSVD               0x03

 /* task attribute */
 #define ATTR_UNTAGGED           0x00
 #define ATTR_SIMPLE             0x04
 #define ATTR_HEADOFQUEUE        0x05
 #define ATTR_ORDERED            0x06
 #define ATTR_ACA                0x07

 /* cdb type */
 #define TYPE_CMD				0x00
 #define TYPE_MSG				0x01

 /* Message Types  */
 #define HPSA_TASK_MANAGEMENT    0x00
 #define HPSA_RESET              0x01
 #define HPSA_SCAN               0x02
 #define HPSA_NOOP               0x03

 #define HPSA_CTLR_RESET_TYPE    0x00
 #define HPSA_BUS_RESET_TYPE     0x01
 #define HPSA_TARGET_RESET_TYPE  0x03
 #define HPSA_LUN_RESET_TYPE     0x04
 #define HPSA_NEXUS_RESET_TYPE   0x05

 /* Task Management Functions */
 #define HPSA_TMF_ABORT_TASK     0x00
 #define HPSA_TMF_ABORT_TASK_SET 0x01
 #define HPSA_TMF_CLEAR_ACA      0x02
 #define HPSA_TMF_CLEAR_TASK_SET 0x03
 #define HPSA_TMF_QUERY_TASK     0x04
 #define HPSA_TMF_QUERY_TASK_SET 0x05
 #define HPSA_TMF_QUERY_ASYNCEVENT 0x06


 /* config space register offsets */
 #define CFG_VENDORID            0x00
 #define CFG_DEVICEID            0x02
 #define CFG_I2OBAR              0x10
 #define CFG_MEM1BAR             0x14

 /* i2o space register offsets */
 #define I2O_IBDB_SET            0x20
 #define I2O_IBDB_CLEAR          0x70
 #define I2O_INT_STATUS          0x30
 #define I2O_INT_MASK            0x34
 #define I2O_IBPOST_Q            0x40
 #define I2O_OBPOST_Q            0x44
 #define I2O_DMA1_CFG		0x214

 /* Configuration Table */
 #define CFGTBL_ChangeReq        0x00000001l
 #define CFGTBL_AccCmds          0x00000001l
 #define DOORBELL_CTLR_RESET	0x00000004l
 #define DOORBELL_CTLR_RESET2	0x00000020l

 #define CFGTBL_Trans_Simple     0x00000002l
 #define CFGTBL_Trans_Performant 0x00000004l
 #define CFGTBL_Trans_use_short_tags 0x20000000l
 #define CFGTBL_Trans_enable_directed_msix (1 << 30)

 #define CFGTBL_BusType_Ultra2   0x00000001l
 #define CFGTBL_BusType_Ultra3   0x00000002l
 #define CFGTBL_BusType_Fibre1G  0x00000100l
 #define CFGTBL_BusType_Fibre2G  0x00000200l
 struct vals32 {
 	u32   lower;
 	u32   upper;
 };

 union u64bit {
 	struct vals32 val32;
 	u64 val;
 };

 /* FIXME this is a per controller value (barf!) */
 #define HPSA_MAX_LUN 1024
 #define HPSA_MAX_PHYS_LUN 1024
 #define MAX_EXT_TARGETS 32
 #define HPSA_MAX_DEVICES (HPSA_MAX_PHYS_LUN + HPSA_MAX_LUN + \
 	MAX_EXT_TARGETS + 1) /* + 1 is for the controller itself */

 /* SCSI-3 Commands */
 #pragma pack(1)

 #define HPSA_INQUIRY 0x12
 struct InquiryData {
 	u8 data_byte[36];
 };

 #define HPSA_REPORT_LOG 0xc2    /* Report Logical LUNs */
 #define HPSA_REPORT_PHYS 0xc3   /* Report Physical LUNs */
 struct ReportLUNdata {
 	u8 LUNListLength[4];
 	u32 reserved;
 	u8 LUN[HPSA_MAX_LUN][8];
 };

 struct ReportExtendedLUNdata {
 	u8 LUNListLength[4];
 	u8 extended_response_flag;
 	u8 reserved[3];
 	u8 LUN[HPSA_MAX_LUN][24];
 };

 struct SenseSubsystem_info {
 	u8 reserved[36];
 	u8 portname[8];
 	u8 reserved1[1108];
 };

 /* BMIC commands */
 #define BMIC_READ 0x26
 #define BMIC_WRITE 0x27
 #define BMIC_CACHE_FLUSH 0xc2
 #define HPSA_CACHE_FLUSH 0x01	/* C2 was already being used by HPSA */
 #define BMIC_FLASH_FIRMWARE 0xF7

 /* Command List Structure */
 union SCSI3Addr {
 	struct {
 		u8 Dev;
 		u8 Bus:6;
 		u8 Mode:2;        /* b00 */
 	} PeripDev;
 	struct {
 		u8 DevLSB;
 		u8 DevMSB:6;
 		u8 Mode:2;        /* b01 */
 	} LogDev;
 	struct {
 		u8 Dev:5;
 		u8 Bus:3;
 		u8 Targ:6;
 		u8 Mode:2;        /* b10 */
 	} LogUnit;
 };

 struct PhysDevAddr {
 	u32             TargetId:24;
 	u32             Bus:6;
 	u32             Mode:2;
 	/* 2 level target device addr */
 	union SCSI3Addr  Target[2];
 };

 struct LogDevAddr {
 	u32            VolId:30;
 	u32            Mode:2;
 	u8             reserved[4];
 };

 union LUNAddr {
 	u8               LunAddrBytes[8];
 	union SCSI3Addr    SCSI3Lun[4];
 	struct PhysDevAddr PhysDev;
 	struct LogDevAddr  LogDev;
 };

 struct CommandListHeader {
 	u8              ReplyQueue;
 	u8              SGList;
 	u16             SGTotal;
 	struct vals32     Tag;
 	union LUNAddr     LUN;
 };

 struct RequestBlock {
 	u8   CDBLen;
 	struct {
 		u8 Type:3;
 		u8 Attribute:3;
 		u8 Direction:2;
 	} Type;
 	u16  Timeout;
 	u8   CDB[16];
 };

 struct ErrDescriptor {
 	struct vals32 Addr;
 	u32  Len;
 };

 struct SGDescriptor {
 	struct vals32 Addr;
 	u32  Len;
 	u32  Ext;
 };

 union MoreErrInfo {
 	struct {
 		u8  Reserved[3];
 		u8  Type;
 		u32 ErrorInfo;
 	} Common_Info;
 	struct {
 		u8  Reserved[2];
 		u8  offense_size; /* size of offending entry */
 		u8  offense_num;  /* byte # of offense 0-base */
 		u32 offense_value;
 	} Invalid_Cmd;
 };
 struct ErrorInfo {
 	u8               ScsiStatus;
 	u8               SenseLen;
 	u16              CommandStatus;
 	u32              ResidualCnt;
 	union MoreErrInfo  MoreErrInfo;
 	u8               SenseInfo[SENSEINFOBYTES];
 };
 /* Command types */
 #define CMD_IOCTL_PEND  0x01
 #define CMD_SCSI	0x03

 #define DIRECT_LOOKUP_SHIFT 5
 #define DIRECT_LOOKUP_BIT 0x10
 #define DIRECT_LOOKUP_MASK (~((1 << DIRECT_LOOKUP_SHIFT) - 1))

 #define HPSA_ERROR_BIT          0x02
 struct ctlr_info; /* defined in hpsa.h */
 /* The size of this structure needs to be divisible by 32
  * on all architectures because low 5 bits of the addresses
  * are used as follows:
  *
  * bit 0: to device, used to indicate "performant mode" command
  *        from device, indidcates error status.
  * bit 1-3: to device, indicates block fetch table entry for
  *          reducing DMA in fetching commands from host memory.
  * bit 4: used to indicate whether tag is "direct lookup" (index),
  *        or a bus address.
  */

 struct CommandList {
 	struct CommandListHeader Header;
 	struct RequestBlock      Request;
 	struct ErrDescriptor     ErrDesc;
 	struct SGDescriptor      SG[SG_ENTRIES_IN_CMD];
 	/* information associated with the command */
 	u32			   busaddr; /* physical addr of this record */
 	struct ErrorInfo *err_info; /* pointer to the allocated mem */
 	struct ctlr_info	   *h;
 	int			   cmd_type;
 	long			   cmdindex;
 	struct list_head list;
 	struct request *rq;
 	struct completion *waiting;
 	void   *scsi_cmd;

 /* on 64 bit architectures, to get this to be 32-byte-aligned
  * it so happens we need PAD_64 bytes of padding, on 32 bit systems,
  * we need PAD_32 bytes of padding (see below).   This does that.
  * If it happens that 64 bit and 32 bit systems need different
  * padding, PAD_32 and PAD_64 can be set independently, and.
  * the code below will do the right thing.
  */
 #define IS_32_BIT ((8 - sizeof(long))/4)
 #define IS_64_BIT (!IS_32_BIT)
 #define PAD_32 (4)
 #define PAD_64 (4)
 #define COMMANDLIST_PAD (IS_32_BIT * PAD_32 + IS_64_BIT * PAD_64)
 	u8 pad[COMMANDLIST_PAD];
 };

 /* Configuration Table Structure */
 struct HostWrite {
 	u32 TransportRequest;
 	u32 Reserved;
 	u32 CoalIntDelay;
 	u32 CoalIntCount;
 };

 #define SIMPLE_MODE     0x02
 #define PERFORMANT_MODE 0x04
 #define MEMQ_MODE       0x08

 struct CfgTable {
 	u8            Signature[4];
 	u32		SpecValence;
 	u32           TransportSupport;
 	u32           TransportActive;
 	struct 		HostWrite HostWrite;
 	u32           CmdsOutMax;
 	u32           BusTypes;
 	u32           TransMethodOffset;
 	u8            ServerName[16];
 	u32           HeartBeat;
 	u32           SCSI_Prefetch;
 	u32	 	MaxScatterGatherElements;
 	u32		MaxLogicalUnits;
 	u32		MaxPhysicalDevices;
 	u32		MaxPhysicalDrivesPerLogicalUnit;
 	u32		MaxPerformantModeCommands;
 	u32		MaxBlockFetch;
 	u32		PowerConservationSupport;
 	u32		PowerConservationEnable;
 	u32		TMFSupportFlags;
 	u8		TMFTagMask[8];
 	u8		reserved[0x78 - 0x70];
 	u32		misc_fw_support; /* offset 0x78 */
 #define			MISC_FW_DOORBELL_RESET (0x02)
 #define			MISC_FW_DOORBELL_RESET2 (0x010)
 	u8		driver_version[32];

 };

 #define NUM_BLOCKFETCH_ENTRIES 8
 struct TransTable_struct {
 	u32            BlockFetch[NUM_BLOCKFETCH_ENTRIES];
 	u32            RepQSize;
 	u32            RepQCount;
 	u32            RepQCtrAddrLow32;
 	u32            RepQCtrAddrHigh32;
 #define MAX_REPLY_QUEUES 8
 	struct vals32  RepQAddr[MAX_REPLY_QUEUES];
 };

 struct hpsa_pci_info {
 	unsigned char	bus;
 	unsigned char	dev_fn;
 	unsigned short	domain;
 	u32		board_id;
 };

 #pragma pack()
 #endif /* HPSA_CMD_H */
	/*
	* Disk Array driver for HP Smart Array SAS controllers
	* Copyright 2000, 2009 Hewlett-Packard Development Company, L.P.
	*
	* 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; version 2 of the License.
	*
	* 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, GOOD TITLE or
	* NON INFRINGEMENT. See the GNU General Public License for more details.
	*
	* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	* Questions/Comments/Bugfixes to iss_storagedev@hp.com
	*
	*/
	#ifndef HPSA_CMD_H
	#define HPSA_CMD_H

	/* general boundary defintions */
	#define SENSEINFOBYTES 32 /* may vary between hbas */
	#define SG_ENTRIES_IN_CMD 32 /* Max SG entries excluding chain blocks */
	#define HPSA_SG_CHAIN 0x80000000
	#define MAXREPLYQS 256

	/* Command Status value */
	#define CMD_SUCCESS 0x0000
	#define CMD_TARGET_STATUS 0x0001
	#define CMD_DATA_UNDERRUN 0x0002
	#define CMD_DATA_OVERRUN 0x0003
	#define CMD_INVALID 0x0004
	#define CMD_PROTOCOL_ERR 0x0005
	#define CMD_HARDWARE_ERR 0x0006
	#define CMD_CONNECTION_LOST 0x0007
	#define CMD_ABORTED 0x0008
	#define CMD_ABORT_FAILED 0x0009
	#define CMD_UNSOLICITED_ABORT 0x000A
	#define CMD_TIMEOUT 0x000B
	#define CMD_UNABORTABLE 0x000C

	/* Unit Attentions ASC's as defined for the MSA2012sa */
	#define POWER_OR_RESET 0x29
	#define STATE_CHANGED 0x2a
	#define UNIT_ATTENTION_CLEARED 0x2f
	#define LUN_FAILED 0x3e
	#define REPORT_LUNS_CHANGED 0x3f

	/* Unit Attentions ASCQ's as defined for the MSA2012sa */

	/* These ASCQ's defined for ASC = POWER_OR_RESET */
	#define POWER_ON_RESET 0x00
	#define POWER_ON_REBOOT 0x01
	#define SCSI_BUS_RESET 0x02
	#define MSA_TARGET_RESET 0x03
	#define CONTROLLER_FAILOVER 0x04
	#define TRANSCEIVER_SE 0x05
	#define TRANSCEIVER_LVD 0x06

	/* These ASCQ's defined for ASC = STATE_CHANGED */
	#define RESERVATION_PREEMPTED 0x03
	#define ASYM_ACCESS_CHANGED 0x06
	#define LUN_CAPACITY_CHANGED 0x09

	/* transfer direction */
	#define XFER_NONE 0x00
	#define XFER_WRITE 0x01
	#define XFER_READ 0x02
	#define XFER_RSVD 0x03

	/* task attribute */
	#define ATTR_UNTAGGED 0x00
	#define ATTR_SIMPLE 0x04
	#define ATTR_HEADOFQUEUE 0x05
	#define ATTR_ORDERED 0x06
	#define ATTR_ACA 0x07

	/* cdb type */
	#define TYPE_CMD 0x00
	#define TYPE_MSG 0x01

	/* Message Types */
	#define HPSA_TASK_MANAGEMENT 0x00
	#define HPSA_RESET 0x01
	#define HPSA_SCAN 0x02
	#define HPSA_NOOP 0x03

	#define HPSA_CTLR_RESET_TYPE 0x00
	#define HPSA_BUS_RESET_TYPE 0x01
	#define HPSA_TARGET_RESET_TYPE 0x03
	#define HPSA_LUN_RESET_TYPE 0x04
	#define HPSA_NEXUS_RESET_TYPE 0x05

	/* Task Management Functions */
	#define HPSA_TMF_ABORT_TASK 0x00
	#define HPSA_TMF_ABORT_TASK_SET 0x01
	#define HPSA_TMF_CLEAR_ACA 0x02
	#define HPSA_TMF_CLEAR_TASK_SET 0x03
	#define HPSA_TMF_QUERY_TASK 0x04
	#define HPSA_TMF_QUERY_TASK_SET 0x05
	#define HPSA_TMF_QUERY_ASYNCEVENT 0x06



	/* config space register offsets */
	#define CFG_VENDORID 0x00
	#define CFG_DEVICEID 0x02
	#define CFG_I2OBAR 0x10
	#define CFG_MEM1BAR 0x14

	/* i2o space register offsets */
	#define I2O_IBDB_SET 0x20
	#define I2O_IBDB_CLEAR 0x70
	#define I2O_INT_STATUS 0x30
	#define I2O_INT_MASK 0x34
	#define I2O_IBPOST_Q 0x40
	#define I2O_OBPOST_Q 0x44
	#define I2O_DMA1_CFG 0x214

	/* Configuration Table */
	#define CFGTBL_ChangeReq 0x00000001l
	#define CFGTBL_AccCmds 0x00000001l
	#define DOORBELL_CTLR_RESET 0x00000004l
	#define DOORBELL_CTLR_RESET2 0x00000020l

	#define CFGTBL_Trans_Simple 0x00000002l
	#define CFGTBL_Trans_Performant 0x00000004l
	#define CFGTBL_Trans_use_short_tags 0x20000000l
	#define CFGTBL_Trans_enable_directed_msix (1 << 30)

	#define CFGTBL_BusType_Ultra2 0x00000001l
	#define CFGTBL_BusType_Ultra3 0x00000002l
	#define CFGTBL_BusType_Fibre1G 0x00000100l
	#define CFGTBL_BusType_Fibre2G 0x00000200l
	struct vals32 {
	u32 lower;
	u32 upper;
	};

	union u64bit {
	struct vals32 val32;
	u64 val;
	};

	/* FIXME this is a per controller value (barf!) */
	#define HPSA_MAX_LUN 1024
	#define HPSA_MAX_PHYS_LUN 1024
	#define MAX_EXT_TARGETS 32
	#define HPSA_MAX_DEVICES (HPSA_MAX_PHYS_LUN + HPSA_MAX_LUN + \
	MAX_EXT_TARGETS + 1) /* + 1 is for the controller itself */

	/* SCSI-3 Commands */
	#pragma pack(1)

	#define HPSA_INQUIRY 0x12
	struct InquiryData {
	u8 data_byte[36];
	};

	#define HPSA_REPORT_LOG 0xc2 /* Report Logical LUNs */
	#define HPSA_REPORT_PHYS 0xc3 /* Report Physical LUNs */
	struct ReportLUNdata {
	u8 LUNListLength[4];
	u32 reserved;
	u8 LUN[HPSA_MAX_LUN][8];
	};

	struct ReportExtendedLUNdata {
	u8 LUNListLength[4];
	u8 extended_response_flag;
	u8 reserved[3];
	u8 LUN[HPSA_MAX_LUN][24];
	};

	struct SenseSubsystem_info {
	u8 reserved[36];
	u8 portname[8];
	u8 reserved1[1108];
	};

	/* BMIC commands */
	#define BMIC_READ 0x26
	#define BMIC_WRITE 0x27
	#define BMIC_CACHE_FLUSH 0xc2
	#define HPSA_CACHE_FLUSH 0x01 /* C2 was already being used by HPSA */
	#define BMIC_FLASH_FIRMWARE 0xF7

	/* Command List Structure */
	union SCSI3Addr {
	struct {
	u8 Dev;
	u8 Bus:6;
	u8 Mode:2; /* b00 */
	} PeripDev;
	struct {
	u8 DevLSB;
	u8 DevMSB:6;
	u8 Mode:2; /* b01 */
	} LogDev;
	struct {
	u8 Dev:5;
	u8 Bus:3;
	u8 Targ:6;
	u8 Mode:2; /* b10 */
	} LogUnit;
	};

	struct PhysDevAddr {
	u32 TargetId:24;
	u32 Bus:6;
	u32 Mode:2;
	/* 2 level target device addr */
	union SCSI3Addr Target[2];
	};

	struct LogDevAddr {
	u32 VolId:30;
	u32 Mode:2;
	u8 reserved[4];
	};

	union LUNAddr {
	u8 LunAddrBytes[8];
	union SCSI3Addr SCSI3Lun[4];
	struct PhysDevAddr PhysDev;
	struct LogDevAddr LogDev;
	};

	struct CommandListHeader {
	u8 ReplyQueue;
	u8 SGList;
	u16 SGTotal;
	struct vals32 Tag;
	union LUNAddr LUN;
	};

	struct RequestBlock {
	u8 CDBLen;
	struct {
	u8 Type:3;
	u8 Attribute:3;
	u8 Direction:2;
	} Type;
	u16 Timeout;
	u8 CDB[16];
	};

	struct ErrDescriptor {
	struct vals32 Addr;
	u32 Len;
	};

	struct SGDescriptor {
	struct vals32 Addr;
	u32 Len;
	u32 Ext;
	};

	union MoreErrInfo {
	struct {
	u8 Reserved[3];
	u8 Type;
	u32 ErrorInfo;
	} Common_Info;
	struct {
	u8 Reserved[2];
	u8 offense_size; /* size of offending entry */
	u8 offense_num; /* byte # of offense 0-base */
	u32 offense_value;
	} Invalid_Cmd;
	};
	struct ErrorInfo {
	u8 ScsiStatus;
	u8 SenseLen;
	u16 CommandStatus;
	u32 ResidualCnt;
	union MoreErrInfo MoreErrInfo;
	u8 SenseInfo[SENSEINFOBYTES];
	};
	/* Command types */
	#define CMD_IOCTL_PEND 0x01
	#define CMD_SCSI 0x03

	#define DIRECT_LOOKUP_SHIFT 5
	#define DIRECT_LOOKUP_BIT 0x10
	#define DIRECT_LOOKUP_MASK (~((1 << DIRECT_LOOKUP_SHIFT) - 1))

	#define HPSA_ERROR_BIT 0x02
	struct ctlr_info; /* defined in hpsa.h */
	/* The size of this structure needs to be divisible by 32
	* on all architectures because low 5 bits of the addresses
	* are used as follows:
	*
	* bit 0: to device, used to indicate "performant mode" command
	* from device, indidcates error status.
	* bit 1-3: to device, indicates block fetch table entry for
	* reducing DMA in fetching commands from host memory.
	* bit 4: used to indicate whether tag is "direct lookup" (index),
	* or a bus address.
	*/

	struct CommandList {
	struct CommandListHeader Header;
	struct RequestBlock Request;
	struct ErrDescriptor ErrDesc;
	struct SGDescriptor SG[SG_ENTRIES_IN_CMD];
	/* information associated with the command */
	u32 busaddr; /* physical addr of this record */
	struct ErrorInfo err_info; / pointer to the allocated mem */
	struct ctlr_info *h;
	int cmd_type;
	long cmdindex;
	struct list_head list;
	struct request *rq;
	struct completion *waiting;
	void *scsi_cmd;

	/* on 64 bit architectures, to get this to be 32-byte-aligned
	* it so happens we need PAD_64 bytes of padding, on 32 bit systems,
	* we need PAD_32 bytes of padding (see below). This does that.
	* If it happens that 64 bit and 32 bit systems need different
	* padding, PAD_32 and PAD_64 can be set independently, and.
	* the code below will do the right thing.
	*/
	#define IS_32_BIT ((8 - sizeof(long))/4)
	#define IS_64_BIT (!IS_32_BIT)
	#define PAD_32 (4)
	#define PAD_64 (4)
	#define COMMANDLIST_PAD (IS_32_BIT * PAD_32 + IS_64_BIT * PAD_64)
	u8 pad[COMMANDLIST_PAD];
	};

	/* Configuration Table Structure */
	struct HostWrite {
	u32 TransportRequest;
	u32 Reserved;
	u32 CoalIntDelay;
	u32 CoalIntCount;
	};

	#define SIMPLE_MODE 0x02
	#define PERFORMANT_MODE 0x04
	#define MEMQ_MODE 0x08

	struct CfgTable {
	u8 Signature[4];
	u32 SpecValence;
	u32 TransportSupport;
	u32 TransportActive;
	struct HostWrite HostWrite;
	u32 CmdsOutMax;
	u32 BusTypes;
	u32 TransMethodOffset;
	u8 ServerName[16];
	u32 HeartBeat;
	u32 SCSI_Prefetch;
	u32 MaxScatterGatherElements;
	u32 MaxLogicalUnits;
	u32 MaxPhysicalDevices;
	u32 MaxPhysicalDrivesPerLogicalUnit;
	u32 MaxPerformantModeCommands;
	u32 MaxBlockFetch;
	u32 PowerConservationSupport;
	u32 PowerConservationEnable;
	u32 TMFSupportFlags;
	u8 TMFTagMask[8];
	u8 reserved[0x78 - 0x70];
	u32 misc_fw_support; /* offset 0x78 */
	#define MISC_FW_DOORBELL_RESET (0x02)
	#define MISC_FW_DOORBELL_RESET2 (0x010)
	u8 driver_version[32];

	};

	#define NUM_BLOCKFETCH_ENTRIES 8
	struct TransTable_struct {
	u32 BlockFetch[NUM_BLOCKFETCH_ENTRIES];
	u32 RepQSize;
	u32 RepQCount;
	u32 RepQCtrAddrLow32;
	u32 RepQCtrAddrHigh32;
	#define MAX_REPLY_QUEUES 8
	struct vals32 RepQAddr[MAX_REPLY_QUEUES];
	};

	struct hpsa_pci_info {
	unsigned char bus;
	unsigned char dev_fn;
	unsigned short domain;
	u32 board_id;
	};

	#pragma pack()
	#endif /* HPSA_CMD_H */