X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Fscsi%2Fscsi.h;h=00137a7769ee267f76679966cdb4e5e6005d9f8d;hb=765cbc6dad16b87724803e359d6be792ddf08614;hp=3507b3d7c0ebeed2fddc6bb8ac08e782d4063329;hpb=b6651129cc27d56a9cbefcb5f713cea7706fd6b7;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 3507b3d..00137a7 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -9,27 +9,32 @@ #define _SCSI_SCSI_H #include +#include /* - * The maximum sg list length SCSI can cope with - * (currently must be a power of 2 between 32 and 256) + * The maximum number of SG segments that we will put inside a + * scatterlist (unless chaining is used). Should ideally fit inside a + * single page, to avoid a higher order allocation. We could define this + * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The + * minimum value is 32 */ -#define SCSI_MAX_PHYS_SEGMENTS MAX_PHYS_SEGMENTS - +#define SCSI_MAX_SG_SEGMENTS 128 /* - * SCSI command lengths + * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit + * is totally arbitrary, a setting of 2048 will get you at least 8mb ios. */ - -extern const unsigned char scsi_command_size[8]; -#define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7] +#ifdef ARCH_HAS_SG_CHAIN +#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048 +#else +#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS +#endif /* - * SCSI device types + * Special value for scanning to specify scanning or rescanning of all + * possible channels, (target) ids, or luns on a given shost. */ - -#define MAX_SCSI_DEVICE_CODE 14 -extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE]; +#define SCAN_WILD_CARD ~0 /* * SCSI opcodes @@ -41,6 +46,7 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE]; #define FORMAT_UNIT 0x04 #define READ_BLOCK_LIMITS 0x05 #define REASSIGN_BLOCKS 0x07 +#define INITIALIZE_ELEMENT_STATUS 0x07 #define READ_6 0x08 #define WRITE_6 0x0a #define SEEK_6 0x0b @@ -65,6 +71,7 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE]; #define READ_10 0x28 #define WRITE_10 0x2a #define SEEK_10 0x2b +#define POSITION_TO_ELEMENT 0x2b #define WRITE_VERIFY 0x2e #define VERIFY 0x2f #define SEARCH_HIGH 0x30 @@ -89,14 +96,18 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE]; #define READ_TOC 0x43 #define LOG_SELECT 0x4c #define LOG_SENSE 0x4d +#define XDWRITEREAD_10 0x53 #define MODE_SELECT_10 0x55 #define RESERVE_10 0x56 #define RELEASE_10 0x57 #define MODE_SENSE_10 0x5a #define PERSISTENT_RESERVE_IN 0x5e #define PERSISTENT_RESERVE_OUT 0x5f +#define VARIABLE_LENGTH_CMD 0x7f #define REPORT_LUNS 0xa0 +#define MAINTENANCE_IN 0xa3 #define MOVE_MEDIUM 0xa5 +#define EXCHANGE_MEDIUM 0xa6 #define READ_12 0xa8 #define WRITE_12 0xaa #define WRITE_VERIFY_12 0xae @@ -112,7 +123,44 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE]; #define SERVICE_ACTION_IN 0x9e /* values for service action in */ #define SAI_READ_CAPACITY_16 0x10 +/* values for maintenance in */ +#define MI_REPORT_TARGET_PGS 0x0a + +/* Values for T10/04-262r7 */ +#define ATA_16 0x85 /* 16-byte pass-thru */ +#define ATA_12 0xa1 /* 12-byte pass-thru */ + +/* + * SCSI command lengths + */ +#define SCSI_MAX_VARLEN_CDB_SIZE 260 + +/* defined in T10 SCSI Primary Commands-2 (SPC2) */ +struct scsi_varlen_cdb_hdr { + u8 opcode; /* opcode always == VARIABLE_LENGTH_CMD */ + u8 control; + u8 misc[5]; + u8 additional_cdb_length; /* total cdb length - 8 */ + __be16 service_action; + /* service specific data follows */ +}; + +static inline unsigned +scsi_varlen_cdb_length(const void *hdr) +{ + return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8; +} + +extern const unsigned char scsi_command_size_tbl[8]; +#define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7] + +static inline unsigned +scsi_command_size(const unsigned char *cmnd) +{ + return (cmnd[0] == VARIABLE_LENGTH_CMD) ? + scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]); +} /* * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft @@ -195,6 +243,7 @@ static inline int scsi_status_is_good(int status) /* * DEVICE TYPES + * Please keep them in 0x%02x format for $MODALIAS to work */ #define TYPE_DISK 0x00 @@ -208,10 +257,28 @@ static inline int scsi_status_is_good(int status) * - treated as TYPE_DISK */ #define TYPE_MEDIUM_CHANGER 0x08 #define TYPE_COMM 0x09 /* Communications device */ -#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ #define TYPE_RAID 0x0c +#define TYPE_ENCLOSURE 0x0d /* Enclosure Services Device */ +#define TYPE_RBC 0x0e #define TYPE_NO_LUN 0x7f +/* SCSI protocols; these are taken from SPC-3 section 7.5 */ +enum scsi_protocol { + SCSI_PROTOCOL_FCP = 0, /* Fibre Channel */ + SCSI_PROTOCOL_SPI = 1, /* parallel SCSI */ + SCSI_PROTOCOL_SSA = 2, /* Serial Storage Architecture - Obsolete */ + SCSI_PROTOCOL_SBP = 3, /* firewire */ + SCSI_PROTOCOL_SRP = 4, /* Infiniband RDMA */ + SCSI_PROTOCOL_ISCSI = 5, + SCSI_PROTOCOL_SAS = 6, + SCSI_PROTOCOL_ADT = 7, /* Media Changers */ + SCSI_PROTOCOL_ATA = 8, + SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */ +}; + +/* Returns a human-readable name for the device */ +extern const char * scsi_device_type(unsigned type); + /* * standard mode-select header prepended to all mode-select commands */ @@ -295,6 +362,8 @@ struct scsi_lun { #define DID_PASSTHROUGH 0x0a /* Force command past mid-layer */ #define DID_SOFT_ERROR 0x0b /* The low level driver just wish a retry */ #define DID_IMM_RETRY 0x0c /* Retry without decrementing retry count */ +#define DID_REQUEUE 0x0d /* Requeue command (no immediate retry) also + * without decrementing the retry count */ #define DRIVER_OK 0x00 /* Driver status */ /* @@ -332,6 +401,7 @@ struct scsi_lun { #define SOFT_ERROR 0x2005 #define ADD_TO_MLQUEUE 0x2006 #define TIMEOUT_ERROR 0x2007 +#define SCSI_RETURN_NOT_HANDLED 0x2008 /* * Midlevel queue return values. @@ -356,6 +426,22 @@ struct scsi_lun { #define driver_byte(result) (((result) >> 24) & 0xff) #define suggestion(result) (driver_byte(result) & SUGGEST_MASK) +static inline void set_msg_byte(struct scsi_cmnd *cmd, char status) +{ + cmd->result |= status << 8; +} + +static inline void set_host_byte(struct scsi_cmnd *cmd, char status) +{ + cmd->result |= status << 16; +} + +static inline void set_driver_byte(struct scsi_cmnd *cmd, char status) +{ + cmd->result |= status << 24; +} + + #define sense_class(sense) (((sense) >> 4) & 0x7) #define sense_error(sense) ((sense) & 0xf) #define sense_valid(sense) ((sense) & 0x80); @@ -418,4 +504,10 @@ struct scsi_lun { /* Used to obtain the PCI location of a device */ #define SCSI_IOCTL_GET_PCI 0x5387 +/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */ +static inline __u32 scsi_to_u32(__u8 *ptr) +{ + return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3]; +} + #endif /* _SCSI_SCSI_H */