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 /* scsi-disk.c */
  13 enum scsi_reason {
  14     SCSI_REASON_DONE, /* Command complete.  */
  15     SCSI_REASON_DATA  /* Transfer complete, more data required.  */
  16 };
  17
  18 typedef struct SCSIBus SCSIBus;
  19 typedef struct SCSIBusOps SCSIBusOps;
  20 typedef struct SCSIDevice SCSIDevice;
  21 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  22 typedef struct SCSIRequest SCSIRequest;
  23
  24 enum SCSIXferMode {
  25     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  26     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  27     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  28 };
  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     int (*write_data)(SCSIRequest *req);
  75     void (*cancel_io)(SCSIRequest *req);
  76     uint8_t *(*get_buf)(SCSIRequest *req);
  77 };
  78
  79 struct SCSIBusOps {
  80     void (*complete)(SCSIRequest *req, int reason, uint32_t arg);
  81     void (*cancel)(SCSIRequest *req);
  82 };
  83
  84 struct SCSIBus {
  85     BusState qbus;
  86     int busnr;
  87
  88     int tcq, ndev;
  89     const SCSIBusOps *ops;
  90
  91     SCSIDevice *devs[MAX_SCSI_DEVS];
  92 };
  93
  94 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  95                   const SCSIBusOps *ops);
  96 void scsi_qdev_register(SCSIDeviceInfo *info);
  97
  98 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
  99 {
 100     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 101 }
 102
 103 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv,
 104                                       int unit, bool removable);
 105 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 106
 107 SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
 108 void scsi_req_enqueue(SCSIRequest *req);
 109 void scsi_req_free(SCSIRequest *req);
 110 void scsi_req_dequeue(SCSIRequest *req);
 111 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 112 void scsi_req_unref(SCSIRequest *req);
 113
 114 int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 115 void scsi_req_print(SCSIRequest *req);
 116 void scsi_req_data(SCSIRequest *req, int len);
 117 void scsi_req_complete(SCSIRequest *req);
 118 void scsi_req_abort(SCSIRequest *req, int status);
 119 void scsi_req_cancel(SCSIRequest *req);
 120 void scsi_device_purge_requests(SCSIDevice *sdev);
 121
 122 #endif