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     size_t            resid;
  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                      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     QEMUBH *bh;
  73     uint32_t id;
  74     BlockConf conf;
  75     SCSISense unit_attention;
  76     bool sense_is_ua;
  77     uint8_t sense[SCSI_SENSE_BUF_SIZE];
  78     uint32_t sense_len;
  79     QTAILQ_HEAD(, SCSIRequest) requests;
  80     uint32_t channel;
  81     uint32_t lun;
  82     int blocksize;
  83     int type;
  84     uint64_t max_lba;
  85     uint64_t wwn;
  86     uint64_t port_wwn;
  87     int scsi_version;
  88     int default_scsi_version;
  89     uint32_t io_timeout;
  90     bool needs_vpd_bl_emulation;
  91     bool hba_supports_iothread;
  92 };
  93
  94 extern const VMStateDescription vmstate_scsi_device;
  95
  96 #define VMSTATE_SCSI_DEVICE(_field, _state) {                        \
  97     .name       = (stringify(_field)),                               \
  98     .size       = sizeof(SCSIDevice),                                \
  99     .vmsd       = &vmstate_scsi_device,                              \
 100     .flags      = VMS_STRUCT,                                        \
 101     .offset     = vmstate_offset_value(_state, _field, SCSIDevice),  \
 102 }
 103
 104 /* cdrom.c */
 105 int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
 106 int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
 107
 108 /* scsi-bus.c */
 109 struct SCSIReqOps {
 110     size_t size;
 111     void (*free_req)(SCSIRequest *req);
 112     int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
 113     void (*read_data)(SCSIRequest *req);
 114     void (*write_data)(SCSIRequest *req);
 115     uint8_t *(*get_buf)(SCSIRequest *req);
 116
 117     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 118     void (*load_request)(QEMUFile *f, SCSIRequest *req);
 119 };
 120
 121 struct SCSIBusInfo {
 122     int tcq;
 123     int max_channel, max_target, max_lun;
 124     int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 125                      void *hba_private);
 126     void (*transfer_data)(SCSIRequest *req, uint32_t arg);
 127     void (*fail)(SCSIRequest *req);
 128     void (*complete)(SCSIRequest *req, size_t resid);
 129     void (*cancel)(SCSIRequest *req);
 130     void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense);
 131     QEMUSGList *(*get_sg_list)(SCSIRequest *req);
 132
 133     void (*save_request)(QEMUFile *f, SCSIRequest *req);
 134     void *(*load_request)(QEMUFile *f, SCSIRequest *req);
 135     void (*free_request)(SCSIBus *bus, void *priv);
 136 };
 137
 138 #define TYPE_SCSI_BUS "SCSI"
 139 OBJECT_DECLARE_SIMPLE_TYPE(SCSIBus, SCSI_BUS)
 140
 141 struct SCSIBus {
 142     BusState qbus;
 143     int busnr;
 144
 145     SCSISense unit_attention;
 146     const SCSIBusInfo *info;
 147 };
 148
 149 /**
 150  * scsi_bus_init_named: Initialize a SCSI bus with the specified name
 151  * @bus: SCSIBus object to initialize
 152  * @bus_size: size of @bus object
 153  * @host: Device which owns the bus (generally the SCSI controller)
 154  * @info: structure defining callbacks etc for the controller
 155  * @bus_name: Name to use for this bus
 156  *
 157  * This in-place initializes @bus as a new SCSI bus with a name
 158  * provided by the caller. It is the caller's responsibility to make
 159  * sure that name does not clash with the name of any other bus in the
 160  * system. Unless you need the new bus to have a specific name, you
 161  * should use scsi_bus_new() instead.
 162  */
 163 void scsi_bus_init_named(SCSIBus *bus, size_t bus_size, DeviceState *host,
 164                          const SCSIBusInfo *info, const char *bus_name);
 165
 166 /**
 167  * scsi_bus_init: Initialize a SCSI bus
 168  *
 169  * This in-place-initializes @bus as a new SCSI bus and gives it
 170  * an automatically generated unique name.
 171  */
 172 static inline void scsi_bus_init(SCSIBus *bus, size_t bus_size,
 173                                  DeviceState *host, const SCSIBusInfo *info)
 174 {
 175     scsi_bus_init_named(bus, bus_size, host, info, NULL);
 176 }
 177
 178 static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
 179 {
 180     return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
 181 }
 182
 183 SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
 184                                       int unit, bool removable, int bootindex,
 185                                       bool share_rw,
 186                                       BlockdevOnError rerror,
 187                                       BlockdevOnError werror,
 188                                       const char *serial, Error **errp);
 189 void scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
 190 void scsi_legacy_handle_cmdline(void);
 191
 192 SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
 193                             uint32_t tag, uint32_t lun, void *hba_private);
 194 SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
 195                           uint8_t *buf, void *hba_private);
 196 int32_t scsi_req_enqueue(SCSIRequest *req);
 197 SCSIRequest *scsi_req_ref(SCSIRequest *req);
 198 void scsi_req_unref(SCSIRequest *req);
 199
 200 int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
 201                        void *hba_private);
 202 int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf);
 203 void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
 204 void scsi_req_print(SCSIRequest *req);
 205 void scsi_req_continue(SCSIRequest *req);
 206 void scsi_req_data(SCSIRequest *req, int len);
 207 void scsi_req_complete(SCSIRequest *req, int status);
 208 void scsi_req_complete_failed(SCSIRequest *req, int host_status);
 209 uint8_t *scsi_req_get_buf(SCSIRequest *req);
 210 int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
 211 void scsi_req_cancel_complete(SCSIRequest *req);
 212 void scsi_req_cancel(SCSIRequest *req);
 213 void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier);
 214 void scsi_req_retry(SCSIRequest *req);
 215 void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
 216 void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense);
 217 void scsi_device_report_change(SCSIDevice *dev, SCSISense sense);
 218 void scsi_device_unit_attention_reported(SCSIDevice *dev);
 219 void scsi_generic_read_device_inquiry(SCSIDevice *dev);
 220 int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
 221 int scsi_SG_IO_FROM_DEV(BlockBackend *blk, uint8_t *cmd, uint8_t cmd_size,
 222                         uint8_t *buf, uint8_t buf_size, uint32_t timeout);
 223 SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
 224 SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int target, int lun);
 225
 226 /* scsi-generic.c. */
 227 extern const SCSIReqOps scsi_generic_req_ops;
 228
 229 #endif