include/hw/scsi/scsi.h

   1 #ifndef QEMU_HW_SCSI_H
   2 #define QEMU_HW_SCSI_H
   3
   4 #include "block/aio.h"
   5 #include "hw/block/block.h"
   6 #include "hw/qdev-core.h"
   7 #include "scsi/utils.h"
   8 #include "qemu/notify.h"
   9 #include "qom/object.h"
  10
  11 #define MAX_SCSI_DEVS   255
  12
  13 typedef struct SCSIBus SCSIBus;
  14 typedef struct SCSIBusInfo SCSIBusInfo;
  15 typedef struct SCSIDevice SCSIDevice;
  16 typedef struct SCSIRequest SCSIRequest;
  17 typedef struct SCSIReqOps SCSIReqOps;
  18
  19 #define SCSI_SENSE_BUF_SIZE_OLD 96
  20 #define SCSI_SENSE_BUF_SIZE 252
  21 #define DEFAULT_IO_TIMEOUT 30
  22
  23 struct SCSIRequest {
  24     SCSIBus           *bus;
  25     SCSIDevice        *dev;
  26     const SCSIReqOps  *ops;
  27     uint32_t          refcount;
  28     uint32_t          tag;
  29     uint32_t          lun;
  30     uint32_t          status;
  31     void              *hba_private;
  32     size_t            resid;
  33     SCSICommand       cmd;
  34     NotifierList      cancel_notifiers;
  35
  36     /* Note:
  37      * - fields before sense are initialized by scsi_req_alloc;
  38      * - sense[] is uninitialized;
  39      * - fields after sense are memset to 0 by scsi_req_alloc.
  40      * */
  41
  42     uint8_t           sense[SCSI_SENSE_BUF_SIZE];
  43     uint32_t          sense_len;
  44     bool              enqueued;
  45     bool              io_canceled;
  46     bool              retry;
  47     bool              dma_started;
  48     BlockAIOCB        *aiocb;
  49     QEMUSGList        *sg;
  50     QTAILQ_ENTRY(SCSIRequest) next;
  51 };
  52
  53 #define TYPE_SCSI_DEVICE "scsi-device"
  54 OBJECT_DECLARE_TYPE(SCSIDevice, SCSIDeviceClass, SCSI_DEVICE)
  55
  56 struct SCSIDeviceClass {
  57     DeviceClass parent_class;
  58     void (*realize)(SCSIDevice *dev, Error **errp);
  59     void (*unrealize)(SCSIDevice *dev);
  60     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
  61                      void *hba_private);
  62     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  63                               uint8_t *buf, void *hba_private);
  64     void (*unit_attention_reported)(SCSIDevice *s);
  65 };
  66
  67 struct SCSIDevice
  68 {
  69     DeviceState qdev;
  70     VMChangeStateEntry *vmsentry;
  71     QEMUBH *bh;
  72     uint32_t id;
  73     BlockConf conf;
  74     SCSISense unit_attention;
  75     bool sense_is_ua;
  76     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  77     uint32_t sense_len;
  78     QTAILQ_HEAD(, SCSIRequest) requests;
  79     uint32_t channel;
  80     uint32_t lun;
  81     int blocksize;
  82     int type;
  83     uint64_t max_lba;
  84     uint64_t wwn;
  85     uint64_t port_wwn;
  86     int scsi_version;
  87     int default_scsi_version;
  88     uint32_t io_timeout;
  89     bool needs_vpd_bl_emulation;
  90     bool hba_supports_iothread;
  91 };
  92
  93 extern const VMStateDescription vmstate_scsi_device;
  94
  95 #define VMSTATE_SCSI_DEVICE(_field, _state) {                        \
  96     .name       = (stringify(_field)),                               \
  97     .size       = sizeof(SCSIDevice),                                \
  98     .vmsd       = &vmstate_scsi_device,                              \
  99     .flags      = VMS_STRUCT,                                        \
 100     .offset     = vmstate_offset_value(_state, _field, SCSIDevice),  \
 101 }
 102
 103 /* cdrom.c */
 104 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
 105 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
 106
 107 /* scsi-bus.c */
 108 struct SCSIReqOps {
 109     size_t size;
 110     void (*free_req)(SCSIRequest *req);
 111     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
 112     void (*read_data)(SCSIRequest *req);
 113     void (*write_data)(SCSIRequest *req);
 114     uint8_t *(*get_buf)(SCSIRequest *req);
 115
 116     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 117     void (*load_request)(QEMUFile *f, SCSIRequest *req);
 118 };
 119
 120 struct SCSIBusInfo {
 121     int tcq;
 122     int max_channel, max_target, max_lun;
 123     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 124                      void *hba_private);
 125     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 126     void (*complete)(SCSIRequest *req, uint32_t arg, size_t resid);
 127     void (*cancel)(SCSIRequest *req);
 128     void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense);
 129     QEMUSGList *(*get_sg_list)(SCSIRequest *req);
 130
 131     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 132     void *(*load_request)(QEMUFile *f, SCSIRequest *req);
 133     void (*free_request)(SCSIBus *bus, void *priv);
 134 };
 135
 136 #define TYPE_SCSI_BUS "SCSI"
 137 OBJECT_DECLARE_SIMPLE_TYPE(SCSIBus, SCSI_BUS)
 138
 139 struct SCSIBus {
 140     BusState qbus;
 141     int busnr;
 142
 143     SCSISense unit_attention;
 144     const SCSIBusInfo *info;
 145 };
 146
 147 void scsi_bus_new(SCSIBus *bus, size_t bus_size, DeviceState *host,
 148                   const SCSIBusInfo *info, const char *bus_name);
 149
 150 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 151 {
 152     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 153 }
 154
 155 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
 156                                       int unit, bool removable, int bootindex,
 157                                       bool share_rw,
 158                                       BlockdevOnError rerror,
 159                                       BlockdevOnError werror,
 160                                       const char *serial, Error **errp);
 161 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 162 void scsi_legacy_handle_cmdline(void);
 163
 164 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 165                             uint32_t tag, uint32_t lun, void *hba_private);
 166 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 167                           uint8_t *buf, void *hba_private);
 168 int32_t scsi_req_enqueue(SCSIRequest *req);
 169 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 170 void scsi_req_unref(SCSIRequest *req);
 171
 172 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 173                        void *hba_private);
 174 int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf);
 175 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 176 void scsi_req_print(SCSIRequest *req);
 177 void scsi_req_continue(SCSIRequest *req);
 178 void scsi_req_data(SCSIRequest *req, int len);
 179 void scsi_req_complete(SCSIRequest *req, int status);
 180 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 181 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 182 void scsi_req_cancel_complete(SCSIRequest *req);
 183 void scsi_req_cancel(SCSIRequest *req);
 184 void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier);
 185 void scsi_req_retry(SCSIRequest *req);
 186 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 187 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense);
 188 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense);
 189 void scsi_device_unit_attention_reported(SCSIDevice *dev);
 190 void scsi_generic_read_device_inquiry(SCSIDevice *dev);
 191 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 192 int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size,
 193                         uint8_t *buf, uint8_t buf_size, uint32_t timeout);
 194 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 195 SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int target, int lun);
 196
 197 /* scsi-generic.c. */
 198 extern const SCSIReqOps scsi_generic_req_ops;
 199
 200 #endif