1 #ifndef SCSI_UTILS_H 2 #define SCSI_UTILS_H 3 4 #ifdef CONFIG_LINUX 5 #include <scsi/sg.h> 6 #endif 7 8 #define SCSI_CMD_BUF_SIZE 16 9 #define SCSI_SENSE_LEN 18 10 #define SCSI_SENSE_LEN_SCANNER 32 11 #define SCSI_INQUIRY_LEN 36 12 13 enum SCSIXferMode { 14 SCSI_XFER_NONE, /* TEST_UNIT_READY, ... */ 15 SCSI_XFER_FROM_DEV, /* READ, INQUIRY, MODE_SENSE, ... */ 16 SCSI_XFER_TO_DEV, /* WRITE, MODE_SELECT, ... */ 17 }; 18 19 typedef struct SCSICommand { 20 uint8_t buf[SCSI_CMD_BUF_SIZE]; 21 int len; 22 size_t xfer; 23 uint64_t lba; 24 enum SCSIXferMode mode; 25 } SCSICommand; 26 27 typedef struct SCSISense { 28 uint8_t key; 29 uint8_t asc; 30 uint8_t ascq; 31 } SCSISense; 32 33 int scsi_build_sense(uint8_t *buf, SCSISense sense); 34 SCSISense scsi_parse_sense_buf(const uint8_t *in_buf, int in_len); 35 int scsi_build_sense_buf(uint8_t *buf, size_t max_size, SCSISense sense, 36 bool fixed_sense); 37 38 /* 39 * Predefined sense codes 40 */ 41 42 /* No sense data available */ 43 extern const struct SCSISense sense_code_NO_SENSE; 44 /* LUN not ready, Manual intervention required */ 45 extern const struct SCSISense sense_code_LUN_NOT_READY; 46 /* LUN not ready, Medium not present */ 47 extern const struct SCSISense sense_code_NO_MEDIUM; 48 /* LUN not ready, medium removal prevented */ 49 extern const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED; 50 /* Hardware error, internal target failure */ 51 extern const struct SCSISense sense_code_TARGET_FAILURE; 52 /* Illegal request, invalid command operation code */ 53 extern const struct SCSISense sense_code_INVALID_OPCODE; 54 /* Illegal request, LBA out of range */ 55 extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE; 56 /* Illegal request, Invalid field in CDB */ 57 extern const struct SCSISense sense_code_INVALID_FIELD; 58 /* Illegal request, Invalid field in parameter list */ 59 extern const struct SCSISense sense_code_INVALID_PARAM; 60 /* Illegal request, Parameter list length error */ 61 extern const struct SCSISense sense_code_INVALID_PARAM_LEN; 62 /* Illegal request, LUN not supported */ 63 extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED; 64 /* Illegal request, Saving parameters not supported */ 65 extern const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED; 66 /* Illegal request, Incompatible format */ 67 extern const struct SCSISense sense_code_INCOMPATIBLE_FORMAT; 68 /* Illegal request, medium removal prevented */ 69 extern const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED; 70 /* Illegal request, Invalid Transfer Tag */ 71 extern const struct SCSISense sense_code_INVALID_TAG; 72 /* Command aborted, I/O process terminated */ 73 extern const struct SCSISense sense_code_IO_ERROR; 74 /* Command aborted, I_T Nexus loss occurred */ 75 extern const struct SCSISense sense_code_I_T_NEXUS_LOSS; 76 /* Command aborted, Logical Unit failure */ 77 extern const struct SCSISense sense_code_LUN_FAILURE; 78 /* Command aborted, LUN Communication failure */ 79 extern const struct SCSISense sense_code_LUN_COMM_FAILURE; 80 /* Command aborted, Overlapped Commands Attempted */ 81 extern const struct SCSISense sense_code_OVERLAPPED_COMMANDS; 82 /* Medium error, Unrecovered read error */ 83 extern const struct SCSISense sense_code_READ_ERROR; 84 /* LUN not ready, Cause not reportable */ 85 extern const struct SCSISense sense_code_NOT_READY; 86 /* Unit attention, Capacity data has changed */ 87 extern const struct SCSISense sense_code_CAPACITY_CHANGED; 88 /* Unit attention, SCSI bus reset */ 89 extern const struct SCSISense sense_code_SCSI_BUS_RESET; 90 /* LUN not ready, Medium not present */ 91 extern const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM; 92 /* Unit attention, Power on, reset or bus device reset occurred */ 93 extern const struct SCSISense sense_code_RESET; 94 /* Unit attention, Medium may have changed*/ 95 extern const struct SCSISense sense_code_MEDIUM_CHANGED; 96 /* Unit attention, Reported LUNs data has changed */ 97 extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED; 98 /* Unit attention, Device internal reset */ 99 extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET; 100 /* Data Protection, Write Protected */ 101 extern const struct SCSISense sense_code_WRITE_PROTECTED; 102 /* Data Protection, Space Allocation Failed Write Protect */ 103 extern const struct SCSISense sense_code_SPACE_ALLOC_FAILED; 104 105 #define SENSE_CODE(x) sense_code_ ## x 106 107 int scsi_sense_to_errno(int key, int asc, int ascq); 108 int scsi_sense_buf_to_errno(const uint8_t *sense, size_t sense_size); 109 bool scsi_sense_buf_is_guest_recoverable(const uint8_t *sense, size_t sense_size); 110 111 int scsi_convert_sense(uint8_t *in_buf, int in_len, 112 uint8_t *buf, int len, bool fixed); 113 const char *scsi_command_name(uint8_t cmd); 114 115 uint64_t scsi_cmd_lba(SCSICommand *cmd); 116 uint32_t scsi_data_cdb_xfer(uint8_t *buf); 117 uint32_t scsi_cdb_xfer(uint8_t *buf); 118 int scsi_cdb_length(uint8_t *buf); 119 120 /* Linux SG_IO interface. */ 121 #ifdef CONFIG_LINUX 122 #define SG_ERR_DRIVER_TIMEOUT 0x06 123 #define SG_ERR_DRIVER_SENSE 0x08 124 125 #define SG_ERR_DID_OK 0x00 126 #define SG_ERR_DID_NO_CONNECT 0x01 127 #define SG_ERR_DID_BUS_BUSY 0x02 128 #define SG_ERR_DID_TIME_OUT 0x03 129 130 #define SG_ERR_DRIVER_SENSE 0x08 131 132 int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr, 133 SCSISense *sense); 134 #endif 135 136 #endif 137