include/hw/scsi/scsi.h

   1 #ifndef QEMU_HW_SCSI_H
   2 #define QEMU_HW_SCSI_H
   3
   4 #include "hw/qdev.h"
   5 #include "hw/block/block.h"
   6 #include "sysemu/sysemu.h"
   7 #include "scsi/utils.h"
   8 #include "qemu/notify.h"
   9
  10 #define MAX_SCSI_DEVS   255
  11
  12 typedef struct SCSIBus SCSIBus;
  13 typedef struct SCSIBusInfo SCSIBusInfo;
  14 typedef struct SCSIDevice SCSIDevice;
  15 typedef struct SCSIRequest SCSIRequest;
  16 typedef struct SCSIReqOps SCSIReqOps;
  17
  18 #define SCSI_SENSE_BUF_SIZE_OLD 96
  19 #define SCSI_SENSE_BUF_SIZE 252
  20
  21 struct SCSIRequest {
  22     SCSIBus           *bus;
  23     SCSIDevice        *dev;
  24     const SCSIReqOps  *ops;
  25     uint32_t          refcount;
  26     uint32_t          tag;
  27     uint32_t          lun;
  28     uint32_t          status;
  29     void              *hba_private;
  30     size_t            resid;
  31     SCSICommand       cmd;
  32     NotifierList      cancel_notifiers;
  33
  34     /* Note:
  35      * - fields before sense are initialized by scsi_req_alloc;
  36      * - sense[] is uninitialized;
  37      * - fields after sense are memset to 0 by scsi_req_alloc.
  38      * */
  39
  40     uint8_t           sense[SCSI_SENSE_BUF_SIZE];
  41     uint32_t          sense_len;
  42     bool              enqueued;
  43     bool              io_canceled;
  44     bool              retry;
  45     bool              dma_started;
  46     BlockAIOCB        *aiocb;
  47     QEMUSGList        *sg;
  48     QTAILQ_ENTRY(SCSIRequest) next;
  49 };
  50
  51 #define TYPE_SCSI_DEVICE "scsi-device"
  52 #define SCSI_DEVICE(obj) \
  53      OBJECT_CHECK(SCSIDevice, (obj), TYPE_SCSI_DEVICE)
  54 #define SCSI_DEVICE_CLASS(klass) \
  55      OBJECT_CLASS_CHECK(SCSIDeviceClass, (klass), TYPE_SCSI_DEVICE)
  56 #define SCSI_DEVICE_GET_CLASS(obj) \
  57      OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)
  58
  59 typedef struct SCSIDeviceClass {
  60     DeviceClass parent_class;
  61     void (*realize)(SCSIDevice *dev, Error **errp);
  62     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
  63                      void *hba_private);
  64     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  65                               uint8_t *buf, void *hba_private);
  66     void (*unit_attention_reported)(SCSIDevice *s);
  67 } SCSIDeviceClass;
  68
  69 struct SCSIDevice
  70 {
  71     DeviceState qdev;
  72     VMChangeStateEntry *vmsentry;
  73     QEMUBH *bh;
  74     uint32_t id;
  75     BlockConf conf;
  76     SCSISense unit_attention;
  77     bool sense_is_ua;
  78     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  79     uint32_t sense_len;
  80     QTAILQ_HEAD(, SCSIRequest) requests;
  81     uint32_t channel;
  82     uint32_t lun;
  83     int blocksize;
  84     int type;
  85     uint64_t max_lba;
  86     uint64_t wwn;
  87     uint64_t port_wwn;
  88 };
  89
  90 extern const VMStateDescription vmstate_scsi_device;
  91
  92 #define VMSTATE_SCSI_DEVICE(_field, _state) {                        \
  93     .name       = (stringify(_field)),                               \
  94     .size       = sizeof(SCSIDevice),                                \
  95     .vmsd       = &vmstate_scsi_device,                              \
  96     .flags      = VMS_STRUCT,                                        \
  97     .offset     = vmstate_offset_value(_state, _field, SCSIDevice),  \
  98 }
  99
 100 /* cdrom.c */
 101 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
 102 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
 103
 104 /* scsi-bus.c */
 105 struct SCSIReqOps {
 106     size_t size;
 107     void (*free_req)(SCSIRequest *req);
 108     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
 109     void (*read_data)(SCSIRequest *req);
 110     void (*write_data)(SCSIRequest *req);
 111     uint8_t *(*get_buf)(SCSIRequest *req);
 112
 113     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 114     void (*load_request)(QEMUFile *f, SCSIRequest *req);
 115 };
 116
 117 struct SCSIBusInfo {
 118     int tcq;
 119     int max_channel, max_target, max_lun;
 120     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 121                      void *hba_private);
 122     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 123     void (*complete)(SCSIRequest *req, uint32_t arg, size_t resid);
 124     void (*cancel)(SCSIRequest *req);
 125     void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense);
 126     QEMUSGList *(*get_sg_list)(SCSIRequest *req);
 127
 128     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 129     void *(*load_request)(QEMUFile *f, SCSIRequest *req);
 130     void (*free_request)(SCSIBus *bus, void *priv);
 131 };
 132
 133 #define TYPE_SCSI_BUS "SCSI"
 134 #define SCSI_BUS(obj) OBJECT_CHECK(SCSIBus, (obj), TYPE_SCSI_BUS)
 135
 136 struct SCSIBus {
 137     BusState qbus;
 138     int busnr;
 139
 140     SCSISense unit_attention;
 141     const SCSIBusInfo *info;
 142 };
 143
 144 void scsi_bus_new(SCSIBus *bus, size_t bus_size, DeviceState *host,
 145                   const SCSIBusInfo *info, const char *bus_name);
 146
 147 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 148 {
 149     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 150 }
 151
 152 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
 153                                       int unit, bool removable, int bootindex,
 154                                       bool share_rw,
 155                                       const char *serial, Error **errp);
 156 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 157 void scsi_legacy_handle_cmdline(void);
 158
 159 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 160                             uint32_t tag, uint32_t lun, void *hba_private);
 161 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 162                           uint8_t *buf, void *hba_private);
 163 int32_t scsi_req_enqueue(SCSIRequest *req);
 164 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 165 void scsi_req_unref(SCSIRequest *req);
 166
 167 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 168                        void *hba_private);
 169 int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf);
 170 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 171 void scsi_req_print(SCSIRequest *req);
 172 void scsi_req_continue(SCSIRequest *req);
 173 void scsi_req_data(SCSIRequest *req, int len);
 174 void scsi_req_complete(SCSIRequest *req, int status);
 175 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 176 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 177 void scsi_req_cancel_complete(SCSIRequest *req);
 178 void scsi_req_cancel(SCSIRequest *req);
 179 void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier);
 180 void scsi_req_retry(SCSIRequest *req);
 181 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 182 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense);
 183 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense);
 184 void scsi_device_unit_attention_reported(SCSIDevice *dev);
 185 void scsi_generic_read_device_identification(SCSIDevice *dev);
 186 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 187 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 188
 189 /* scsi-generic.c. */
 190 extern const SCSIReqOps scsi_generic_req_ops;
 191
 192 #endif