hw/scsi.h

   1 #ifndef QEMU_HW_SCSI_H
   2 #define QEMU_HW_SCSI_H
   3
   4 #include "qdev.h"
   5 #include "block.h"
   6 #include "block_int.h"
   7
   8 #define MAX_SCSI_DEVS   255
   9
  10 #define SCSI_CMD_BUF_SIZE     16
  11
  12 typedef struct SCSIBus SCSIBus;
  13 typedef struct SCSIBusOps SCSIBusOps;
  14 typedef struct SCSIDevice SCSIDevice;
  15 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  16 typedef struct SCSIRequest SCSIRequest;
  17
  18 enum SCSIXferMode {
  19     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  20     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  21     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  22 };
  23
  24 typedef struct SCSISense {
  25     uint8_t key;
  26     uint8_t asc;
  27     uint8_t ascq;
  28 } SCSISense;
  29
  30 struct SCSIRequest {
  31     SCSIBus           *bus;
  32     SCSIDevice        *dev;
  33     uint32_t          refcount;
  34     uint32_t          tag;
  35     uint32_t          lun;
  36     uint32_t          status;
  37     struct {
  38         uint8_t buf[SCSI_CMD_BUF_SIZE];
  39         int len;
  40         size_t xfer;
  41         uint64_t lba;
  42         enum SCSIXferMode mode;
  43     } cmd;
  44     BlockDriverAIOCB  *aiocb;
  45     bool enqueued;
  46     QTAILQ_ENTRY(SCSIRequest) next;
  47 };
  48
  49 struct SCSIDevice
  50 {
  51     DeviceState qdev;
  52     uint32_t id;
  53     BlockConf conf;
  54     SCSIDeviceInfo *info;
  55     QTAILQ_HEAD(, SCSIRequest) requests;
  56     int blocksize;
  57     int type;
  58 };
  59
  60 /* cdrom.c */
  61 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
  62 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
  63
  64 /* scsi-bus.c */
  65 typedef int (*scsi_qdev_initfn)(SCSIDevice *dev);
  66 struct SCSIDeviceInfo {
  67     DeviceInfo qdev;
  68     scsi_qdev_initfn init;
  69     void (*destroy)(SCSIDevice *s);
  70     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun);
  71     void (*free_req)(SCSIRequest *req);
  72     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
  73     void (*read_data)(SCSIRequest *req);
  74     void (*write_data)(SCSIRequest *req);
  75     void (*cancel_io)(SCSIRequest *req);
  76     uint8_t *(*get_buf)(SCSIRequest *req);
  77     int (*get_sense)(SCSIRequest *req, uint8_t *buf, int len);
  78 };
  79
  80 struct SCSIBusOps {
  81     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
  82     void (*complete)(SCSIRequest *req, uint32_t arg);
  83     void (*cancel)(SCSIRequest *req);
  84 };
  85
  86 struct SCSIBus {
  87     BusState qbus;
  88     int busnr;
  89
  90     int tcq, ndev;
  91     const SCSIBusOps *ops;
  92
  93     SCSIDevice *devs[MAX_SCSI_DEVS];
  94 };
  95
  96 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  97                   const SCSIBusOps *ops);
  98 void scsi_qdev_register(SCSIDeviceInfo *info);
  99
 100 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 101 {
 102     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 103 }
 104
 105 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 106                                       int unit, bool removable);
 107 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 108
 109 /*
 110  * Predefined sense codes
 111  */
 112
 113 /* No sense data available */
 114 extern const struct SCSISense sense_code_NO_SENSE;
 115 /* LUN not ready, Manual intervention required */
 116 extern const struct SCSISense sense_code_LUN_NOT_READY;
 117 /* LUN not ready, Medium not present */
 118 extern const struct SCSISense sense_code_NO_MEDIUM;
 119 /* Hardware error, internal target failure */
 120 extern const struct SCSISense sense_code_TARGET_FAILURE;
 121 /* Illegal request, invalid command operation code */
 122 extern const struct SCSISense sense_code_INVALID_OPCODE;
 123 /* Illegal request, LBA out of range */
 124 extern const struct SCSISense sense_code_LBA_OUT_OF_RANGE;
 125 /* Illegal request, Invalid field in CDB */
 126 extern const struct SCSISense sense_code_INVALID_FIELD;
 127 /* Illegal request, LUN not supported */
 128 extern const struct SCSISense sense_code_LUN_NOT_SUPPORTED;
 129 /* Command aborted, I/O process terminated */
 130 extern const struct SCSISense sense_code_IO_ERROR;
 131 /* Command aborted, I_T Nexus loss occurred */
 132 extern const struct SCSISense sense_code_I_T_NEXUS_LOSS;
 133 /* Command aborted, Logical Unit failure */
 134 extern const struct SCSISense sense_code_LUN_FAILURE;
 135
 136 #define SENSE_CODE(x) sense_code_ ## x
 137
 138 int scsi_build_sense(SCSISense sense, uint8_t *buf, int len, int fixed);
 139 int scsi_sense_valid(SCSISense sense);
 140
 141 SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
 142 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun);
 143 int32_t scsi_req_enqueue(SCSIRequest *req, uint8_t *buf);
 144 void scsi_req_free(SCSIRequest *req);
 145 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 146 void scsi_req_unref(SCSIRequest *req);
 147
 148 int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 149 void scsi_req_print(SCSIRequest *req);
 150 void scsi_req_continue(SCSIRequest *req);
 151 void scsi_req_data(SCSIRequest *req, int len);
 152 void scsi_req_complete(SCSIRequest *req);
 153 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 154 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 155 void scsi_req_abort(SCSIRequest *req, int status);
 156 void scsi_req_cancel(SCSIRequest *req);
 157 void scsi_device_purge_requests(SCSIDevice *sdev);
 158
 159 #endif