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 "blockdev.h"
   7 #include "block_int.h"
   8
   9 #define SCSI_CMD_BUF_SIZE     16
  10
  11 /* scsi-disk.c */
  12 enum scsi_reason {
  13     SCSI_REASON_DONE, /* Command complete.  */
  14     SCSI_REASON_DATA  /* Transfer complete, more data required.  */
  15 };
  16
  17 typedef struct SCSIBus SCSIBus;
  18 typedef struct SCSIDevice SCSIDevice;
  19 typedef struct SCSIDeviceInfo SCSIDeviceInfo;
  20 typedef void (*scsi_completionfn)(SCSIBus *bus, int reason, uint32_t tag,
  21                                   uint32_t arg);
  22
  23 enum SCSIXferMode {
  24     SCSI_XFER_NONE,      /*  TEST_UNIT_READY, ...            */
  25     SCSI_XFER_FROM_DEV,  /*  READ, INQUIRY, MODE_SENSE, ...  */
  26     SCSI_XFER_TO_DEV,    /*  WRITE, MODE_SELECT, ...         */
  27 };
  28
  29 typedef struct SCSISense {
  30     uint8_t key;
  31 } SCSISense;
  32
  33 typedef struct SCSIRequest {
  34     SCSIBus           *bus;
  35     SCSIDevice        *dev;
  36     uint32_t          tag;
  37     uint32_t          lun;
  38     uint32_t          status;
  39     struct {
  40         uint8_t buf[SCSI_CMD_BUF_SIZE];
  41         int len;
  42         size_t xfer;
  43         uint64_t lba;
  44         enum SCSIXferMode mode;
  45     } cmd;
  46     BlockDriverAIOCB  *aiocb;
  47     bool enqueued;
  48     QTAILQ_ENTRY(SCSIRequest) next;
  49 } SCSIRequest;
  50
  51 struct SCSIDevice
  52 {
  53     DeviceState qdev;
  54     uint32_t id;
  55     BlockConf conf;
  56     SCSIDeviceInfo *info;
  57     QTAILQ_HEAD(, SCSIRequest) requests;
  58     int blocksize;
  59     int type;
  60     struct SCSISense sense;
  61 };
  62
  63 /* cdrom.c */
  64 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
  65 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
  66
  67 /* scsi-bus.c */
  68 typedef int (*scsi_qdev_initfn)(SCSIDevice *dev);
  69 struct SCSIDeviceInfo {
  70     DeviceInfo qdev;
  71     scsi_qdev_initfn init;
  72     void (*destroy)(SCSIDevice *s);
  73     int32_t (*send_command)(SCSIDevice *s, uint32_t tag, uint8_t *buf,
  74                             int lun);
  75     void (*read_data)(SCSIDevice *s, uint32_t tag);
  76     int (*write_data)(SCSIDevice *s, uint32_t tag);
  77     void (*cancel_io)(SCSIDevice *s, uint32_t tag);
  78     uint8_t *(*get_buf)(SCSIDevice *s, uint32_t tag);
  79 };
  80
  81 typedef void (*SCSIAttachFn)(DeviceState *host, BlockDriverState *bdrv,
  82               int unit);
  83 struct SCSIBus {
  84     BusState qbus;
  85     int busnr;
  86
  87     int tcq, ndev;
  88     scsi_completionfn complete;
  89
  90     SCSIDevice *devs[MAX_SCSI_DEVS];
  91 };
  92
  93 void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev,
  94                   scsi_completionfn complete);
  95 void scsi_qdev_register(SCSIDeviceInfo *info);
  96
  97 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
  98 {
  99     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 100 }
 101
 102 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, int unit);
 103 int scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 104
 105 void scsi_dev_clear_sense(SCSIDevice *dev);
 106 void scsi_dev_set_sense(SCSIDevice *dev, uint8_t key);
 107
 108 SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun);
 109 SCSIRequest *scsi_req_find(SCSIDevice *d, uint32_t tag);
 110 void scsi_req_free(SCSIRequest *req);
 111
 112 int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 113 void scsi_req_print(SCSIRequest *req);
 114 void scsi_req_complete(SCSIRequest *req);
 115
 116 #endif