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     int16_t           status;
  31     int16_t           host_status;
  32     void              *hba_private;
  33     uint64_t          residual;
  34     SCSICommand       cmd;
  35     NotifierList      cancel_notifiers;
  36
  37     /* Note:
  38      * - fields before sense are initialized by scsi_req_alloc;
  39      * - sense[] is uninitialized;
  40      * - fields after sense are memset to 0 by scsi_req_alloc.
  41      * */
  42
  43     uint8_t           sense[SCSI_SENSE_BUF_SIZE];
  44     uint32_t          sense_len;
  45     bool              enqueued;
  46     bool              io_canceled;
  47     bool              retry;
  48     bool              dma_started;
  49     BlockAIOCB        *aiocb;
  50     QEMUSGList        *sg;
  51     QTAILQ_ENTRY(SCSIRequest) next;
  52 };
  53
  54 #define TYPE_SCSI_DEVICE "scsi-device"
  55 OBJECT_DECLARE_TYPE(SCSIDevice, SCSIDeviceClass, SCSI_DEVICE)
  56
  57 struct SCSIDeviceClass {
  58     DeviceClass parent_class;
  59     void (*realize)(SCSIDevice *dev, Error **errp);
  60     void (*unrealize)(SCSIDevice *dev);
  61     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
  62                      size_t buf_len, void *hba_private);
  63     SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
  64                               uint8_t *buf, void *hba_private);
  65     void (*unit_attention_reported)(SCSIDevice *s);
  66 };
  67
  68 struct SCSIDevice
  69 {
  70     DeviceState qdev;
  71     VMChangeStateEntry *vmsentry;
  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
  79     /*
  80      * The requests list is only accessed from the AioContext that executes
  81      * requests or from the main loop when IOThread processing is stopped.
  82      */
  83     QTAILQ_HEAD(, SCSIRequest) requests;
  84
  85     uint32_t channel;
  86     uint32_t lun;
  87     int blocksize;
  88     int type;
  89     uint64_t max_lba;
  90     uint64_t wwn;
  91     uint64_t port_wwn;
  92     int scsi_version;
  93     int default_scsi_version;
  94     uint32_t io_timeout;
  95     bool needs_vpd_bl_emulation;
  96     bool hba_supports_iothread;
  97 };
  98
  99 extern const VMStateDescription vmstate_scsi_device;
 100
 101 #define VMSTATE_SCSI_DEVICE(_field, _state) {                        \
 102     .name       = (stringify(_field)),                               \
 103     .size       = sizeof(SCSIDevice),                                \
 104     .vmsd       = &vmstate_scsi_device,                              \
 105     .flags      = VMS_STRUCT,                                        \
 106     .offset     = vmstate_offset_value(_state, _field, SCSIDevice),  \
 107 }
 108
 109 /* cdrom.c */
 110 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
 111 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
 112
 113 /* scsi-bus.c */
 114 struct SCSIReqOps {
 115     size_t size;
 116     void (*init_req)(SCSIRequest *req);
 117     void (*free_req)(SCSIRequest *req);
 118     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
 119     void (*read_data)(SCSIRequest *req);
 120     void (*write_data)(SCSIRequest *req);
 121     uint8_t *(*get_buf)(SCSIRequest *req);
 122
 123     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 124     void (*load_request)(QEMUFile *f, SCSIRequest *req);
 125 };
 126
 127 struct SCSIBusInfo {
 128     int tcq;
 129     int max_channel, max_target, max_lun;
 130     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 131                      size_t buf_len, void *hba_private);
 132     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 133     void (*fail)(SCSIRequest *req);
 134     void (*complete)(SCSIRequest *req, size_t residual);
 135     void (*cancel)(SCSIRequest *req);
 136     void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense);
 137     QEMUSGList *(*get_sg_list)(SCSIRequest *req);
 138
 139     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 140     void *(*load_request)(QEMUFile *f, SCSIRequest *req);
 141     void (*free_request)(SCSIBus *bus, void *priv);
 142
 143     /*
 144      * Temporarily stop submitting new requests between drained_begin() and
 145      * drained_end(). Called from the main loop thread with the BQL held.
 146      *
 147      * Implement these callbacks if request processing is triggered by a file
 148      * descriptor like an EventNotifier. Otherwise set them to NULL.
 149      */
 150     void (*drained_begin)(SCSIBus *bus);
 151     void (*drained_end)(SCSIBus *bus);
 152 };
 153
 154 #define TYPE_SCSI_BUS "SCSI"
 155 OBJECT_DECLARE_SIMPLE_TYPE(SCSIBus, SCSI_BUS)
 156
 157 struct SCSIBus {
 158     BusState qbus;
 159     int busnr;
 160
 161     SCSISense unit_attention;
 162     const SCSIBusInfo *info;
 163
 164     int drain_count; /* protected by BQL */
 165 };
 166
 167 /**
 168  * scsi_bus_init_named: Initialize a SCSI bus with the specified name
 169  * @bus: SCSIBus object to initialize
 170  * @bus_size: size of @bus object
 171  * @host: Device which owns the bus (generally the SCSI controller)
 172  * @info: structure defining callbacks etc for the controller
 173  * @bus_name: Name to use for this bus
 174  *
 175  * This in-place initializes @bus as a new SCSI bus with a name
 176  * provided by the caller. It is the caller's responsibility to make
 177  * sure that name does not clash with the name of any other bus in the
 178  * system. Unless you need the new bus to have a specific name, you
 179  * should use scsi_bus_init() instead.
 180  */
 181 void scsi_bus_init_named(SCSIBus *bus, size_t bus_size, DeviceState *host,
 182                          const SCSIBusInfo *info, const char *bus_name);
 183
 184 /**
 185  * scsi_bus_init: Initialize a SCSI bus
 186  *
 187  * This in-place-initializes @bus as a new SCSI bus and gives it
 188  * an automatically generated unique name.
 189  */
 190 static inline void scsi_bus_init(SCSIBus *bus, size_t bus_size,
 191                                  DeviceState *host, const SCSIBusInfo *info)
 192 {
 193     scsi_bus_init_named(bus, bus_size, host, info, NULL);
 194 }
 195
 196 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 197 {
 198     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 199 }
 200
 201 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
 202                                       int unit, bool removable, BlockConf *conf,
 203                                       const char *serial, Error **errp);
 204 void scsi_bus_set_ua(SCSIBus *bus, SCSISense sense);
 205 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 206
 207 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 208                             uint32_t tag, uint32_t lun, void *hba_private);
 209 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 210                           uint8_t *buf, size_t buf_len, void *hba_private);
 211 int32_t scsi_req_enqueue(SCSIRequest *req);
 212 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 213 void scsi_req_unref(SCSIRequest *req);
 214
 215 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 216                        size_t buf_len, void *hba_private);
 217 int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 218                        size_t buf_len);
 219 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 220 void scsi_req_print(SCSIRequest *req);
 221 void scsi_req_continue(SCSIRequest *req);
 222 void scsi_req_data(SCSIRequest *req, int len);
 223 void scsi_req_complete(SCSIRequest *req, int status);
 224 void scsi_req_complete_failed(SCSIRequest *req, int host_status);
 225 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 226 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 227 void scsi_req_cancel_complete(SCSIRequest *req);
 228 void scsi_req_cancel(SCSIRequest *req);
 229 void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier);
 230 void scsi_req_retry(SCSIRequest *req);
 231 void scsi_device_drained_begin(SCSIDevice *sdev);
 232 void scsi_device_drained_end(SCSIDevice *sdev);
 233 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 234 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense);
 235 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense);
 236 void scsi_device_unit_attention_reported(SCSIDevice *dev);
 237 void scsi_generic_read_device_inquiry(SCSIDevice *dev);
 238 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 239 int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size,
 240                         uint8_t *buf, uint8_t buf_size, uint32_t timeout);
 241 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 242 SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int target, int lun);
 243
 244 /* scsi-generic.c. */
 245 extern const SCSIReqOps scsi_generic_req_ops;
 246
 247 /* scsi-disk.c */
 248 #define SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR             0
 249 #define SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD             1
 250 #define SCSI_DISK_QUIRK_MODE_PAGE_VENDOR_SPECIFIC_APPLE    2
 251 #define SCSI_DISK_QUIRK_MODE_PAGE_TRUNCATED                3
 252
 253 #endif