33079b2197
This patch changes the way we complete commands. In the old method when we got a completion we searched our command list from the top until we find it. This method uses a tag associated with each command (not SCSI command tagging) to index us directly to the completed command. This helps performance. Signed-off-by: Don Brace <dab@hp.com> Signed-off-by: Mike Miller <mike.miller@hp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
275 lines
7.2 KiB
C
275 lines
7.2 KiB
C
#ifndef CCISS_CMD_H
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#define CCISS_CMD_H
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//###########################################################################
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//DEFINES
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//###########################################################################
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#define CISS_VERSION "1.00"
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//general boundary defintions
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#define SENSEINFOBYTES 32//note that this value may vary between host implementations
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#define MAXSGENTRIES 31
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#define MAXREPLYQS 256
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//Command Status value
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#define CMD_SUCCESS 0x0000
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#define CMD_TARGET_STATUS 0x0001
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#define CMD_DATA_UNDERRUN 0x0002
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#define CMD_DATA_OVERRUN 0x0003
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#define CMD_INVALID 0x0004
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#define CMD_PROTOCOL_ERR 0x0005
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#define CMD_HARDWARE_ERR 0x0006
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#define CMD_CONNECTION_LOST 0x0007
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#define CMD_ABORTED 0x0008
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#define CMD_ABORT_FAILED 0x0009
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#define CMD_UNSOLICITED_ABORT 0x000A
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#define CMD_TIMEOUT 0x000B
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#define CMD_UNABORTABLE 0x000C
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//transfer direction
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#define XFER_NONE 0x00
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#define XFER_WRITE 0x01
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#define XFER_READ 0x02
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#define XFER_RSVD 0x03
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//task attribute
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#define ATTR_UNTAGGED 0x00
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#define ATTR_SIMPLE 0x04
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#define ATTR_HEADOFQUEUE 0x05
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#define ATTR_ORDERED 0x06
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#define ATTR_ACA 0x07
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//cdb type
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#define TYPE_CMD 0x00
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#define TYPE_MSG 0x01
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//config space register offsets
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#define CFG_VENDORID 0x00
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#define CFG_DEVICEID 0x02
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#define CFG_I2OBAR 0x10
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#define CFG_MEM1BAR 0x14
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//i2o space register offsets
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#define I2O_IBDB_SET 0x20
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#define I2O_IBDB_CLEAR 0x70
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#define I2O_INT_STATUS 0x30
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#define I2O_INT_MASK 0x34
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#define I2O_IBPOST_Q 0x40
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#define I2O_OBPOST_Q 0x44
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//Configuration Table
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#define CFGTBL_ChangeReq 0x00000001l
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#define CFGTBL_AccCmds 0x00000001l
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#define CFGTBL_Trans_Simple 0x00000002l
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#define CFGTBL_BusType_Ultra2 0x00000001l
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#define CFGTBL_BusType_Ultra3 0x00000002l
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#define CFGTBL_BusType_Fibre1G 0x00000100l
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#define CFGTBL_BusType_Fibre2G 0x00000200l
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typedef struct _vals32
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{
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__u32 lower;
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__u32 upper;
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} vals32;
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typedef union _u64bit
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{
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vals32 val32;
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__u64 val;
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} u64bit;
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// Type defs used in the following structs
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#define BYTE __u8
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#define WORD __u16
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#define HWORD __u16
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#define DWORD __u32
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#define QWORD vals32
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//###########################################################################
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//STRUCTURES
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//###########################################################################
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#define CISS_MAX_LUN 16
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#define CISS_MAX_PHYS_LUN 1024
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// SCSI-3 Cmmands
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#pragma pack(1)
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#define CISS_INQUIRY 0x12
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//Date returned
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typedef struct _InquiryData_struct
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{
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BYTE data_byte[36];
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} InquiryData_struct;
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#define CISS_REPORT_LOG 0xc2 /* Report Logical LUNs */
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#define CISS_REPORT_PHYS 0xc3 /* Report Physical LUNs */
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// Data returned
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typedef struct _ReportLUNdata_struct
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{
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BYTE LUNListLength[4];
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DWORD reserved;
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BYTE LUN[CISS_MAX_LUN][8];
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} ReportLunData_struct;
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#define CCISS_READ_CAPACITY 0x25 /* Read Capacity */
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typedef struct _ReadCapdata_struct
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{
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BYTE total_size[4]; // Total size in blocks
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BYTE block_size[4]; // Size of blocks in bytes
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} ReadCapdata_struct;
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// 12 byte commands not implemented in firmware yet.
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// #define CCISS_READ 0xa8 // Read(12)
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// #define CCISS_WRITE 0xaa // Write(12)
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#define CCISS_READ 0x28 // Read(10)
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#define CCISS_WRITE 0x2a // Write(10)
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// BMIC commands
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#define BMIC_READ 0x26
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#define BMIC_WRITE 0x27
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#define BMIC_CACHE_FLUSH 0xc2
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#define CCISS_CACHE_FLUSH 0x01 //C2 was already being used by CCISS
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//Command List Structure
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typedef union _SCSI3Addr_struct {
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struct {
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BYTE Dev;
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BYTE Bus:6;
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BYTE Mode:2; // b00
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} PeripDev;
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struct {
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BYTE DevLSB;
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BYTE DevMSB:6;
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BYTE Mode:2; // b01
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} LogDev;
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struct {
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BYTE Dev:5;
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BYTE Bus:3;
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BYTE Targ:6;
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BYTE Mode:2; // b10
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} LogUnit;
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} SCSI3Addr_struct;
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typedef struct _PhysDevAddr_struct {
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DWORD TargetId:24;
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DWORD Bus:6;
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DWORD Mode:2;
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SCSI3Addr_struct Target[2]; //2 level target device addr
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} PhysDevAddr_struct;
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typedef struct _LogDevAddr_struct {
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DWORD VolId:30;
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DWORD Mode:2;
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BYTE reserved[4];
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} LogDevAddr_struct;
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typedef union _LUNAddr_struct {
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BYTE LunAddrBytes[8];
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SCSI3Addr_struct SCSI3Lun[4];
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PhysDevAddr_struct PhysDev;
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LogDevAddr_struct LogDev;
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} LUNAddr_struct;
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typedef struct _CommandListHeader_struct {
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BYTE ReplyQueue;
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BYTE SGList;
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HWORD SGTotal;
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QWORD Tag;
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LUNAddr_struct LUN;
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} CommandListHeader_struct;
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typedef struct _RequestBlock_struct {
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BYTE CDBLen;
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struct {
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BYTE Type:3;
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BYTE Attribute:3;
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BYTE Direction:2;
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} Type;
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HWORD Timeout;
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BYTE CDB[16];
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} RequestBlock_struct;
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typedef struct _ErrDescriptor_struct {
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QWORD Addr;
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DWORD Len;
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} ErrDescriptor_struct;
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typedef struct _SGDescriptor_struct {
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QWORD Addr;
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DWORD Len;
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DWORD Ext;
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} SGDescriptor_struct;
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typedef union _MoreErrInfo_struct{
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struct {
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BYTE Reserved[3];
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BYTE Type;
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DWORD ErrorInfo;
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}Common_Info;
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struct{
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BYTE Reserved[2];
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BYTE offense_size;//size of offending entry
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BYTE offense_num; //byte # of offense 0-base
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DWORD offense_value;
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}Invalid_Cmd;
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}MoreErrInfo_struct;
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typedef struct _ErrorInfo_struct {
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BYTE ScsiStatus;
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BYTE SenseLen;
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HWORD CommandStatus;
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DWORD ResidualCnt;
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MoreErrInfo_struct MoreErrInfo;
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BYTE SenseInfo[SENSEINFOBYTES];
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} ErrorInfo_struct;
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/* Command types */
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#define CMD_RWREQ 0x00
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#define CMD_IOCTL_PEND 0x01
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#define CMD_SCSI 0x03
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#define CMD_MSG_DONE 0x04
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#define CMD_MSG_TIMEOUT 0x05
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/* This structure needs to be divisible by 8 for new
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* indexing method.
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*/
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#define PADSIZE (sizeof(long) - 4)
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typedef struct _CommandList_struct {
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CommandListHeader_struct Header;
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RequestBlock_struct Request;
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ErrDescriptor_struct ErrDesc;
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SGDescriptor_struct SG[MAXSGENTRIES];
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/* information associated with the command */
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__u32 busaddr; /* physical address of this record */
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ErrorInfo_struct * err_info; /* pointer to the allocated mem */
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int ctlr;
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int cmd_type;
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long cmdindex;
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struct _CommandList_struct *prev;
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struct _CommandList_struct *next;
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struct request * rq;
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struct completion *waiting;
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int retry_count;
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void * scsi_cmd;
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char pad[PADSIZE];
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} CommandList_struct;
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//Configuration Table Structure
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typedef struct _HostWrite_struct {
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DWORD TransportRequest;
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DWORD Reserved;
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DWORD CoalIntDelay;
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DWORD CoalIntCount;
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} HostWrite_struct;
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typedef struct _CfgTable_struct {
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BYTE Signature[4];
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DWORD SpecValence;
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DWORD TransportSupport;
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DWORD TransportActive;
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HostWrite_struct HostWrite;
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DWORD CmdsOutMax;
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DWORD BusTypes;
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DWORD Reserved;
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BYTE ServerName[16];
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DWORD HeartBeat;
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DWORD SCSI_Prefetch;
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} CfgTable_struct;
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#pragma pack()
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#endif // CCISS_CMD_H
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