include/scsi/utils.h

   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