2343be0d7e
We would like to have different behavior for passthrough devices depending on the SCSI version they expose. To prepare for that, allow the user of emulated devices to specify the desired SCSI level, and adjust the emulation according to the property value. The next patch will set the level for scsi-block and scsi-generic devices. Based on a patch by Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
195 lines
6.6 KiB
C
195 lines
6.6 KiB
C
#ifndef QEMU_HW_SCSI_H
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#define QEMU_HW_SCSI_H
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#include "hw/qdev.h"
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#include "hw/block/block.h"
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#include "sysemu/sysemu.h"
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#include "scsi/utils.h"
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#include "qemu/notify.h"
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#define MAX_SCSI_DEVS 255
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typedef struct SCSIBus SCSIBus;
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typedef struct SCSIBusInfo SCSIBusInfo;
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typedef struct SCSIDevice SCSIDevice;
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typedef struct SCSIRequest SCSIRequest;
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typedef struct SCSIReqOps SCSIReqOps;
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#define SCSI_SENSE_BUF_SIZE_OLD 96
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#define SCSI_SENSE_BUF_SIZE 252
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struct SCSIRequest {
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SCSIBus *bus;
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SCSIDevice *dev;
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const SCSIReqOps *ops;
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uint32_t refcount;
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uint32_t tag;
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uint32_t lun;
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uint32_t status;
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void *hba_private;
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size_t resid;
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SCSICommand cmd;
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NotifierList cancel_notifiers;
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/* Note:
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* - fields before sense are initialized by scsi_req_alloc;
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* - sense[] is uninitialized;
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* - fields after sense are memset to 0 by scsi_req_alloc.
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* */
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uint8_t sense[SCSI_SENSE_BUF_SIZE];
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uint32_t sense_len;
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bool enqueued;
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bool io_canceled;
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bool retry;
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bool dma_started;
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BlockAIOCB *aiocb;
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QEMUSGList *sg;
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QTAILQ_ENTRY(SCSIRequest) next;
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};
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#define TYPE_SCSI_DEVICE "scsi-device"
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#define SCSI_DEVICE(obj) \
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OBJECT_CHECK(SCSIDevice, (obj), TYPE_SCSI_DEVICE)
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#define SCSI_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(SCSIDeviceClass, (klass), TYPE_SCSI_DEVICE)
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#define SCSI_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(SCSIDeviceClass, (obj), TYPE_SCSI_DEVICE)
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typedef struct SCSIDeviceClass {
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DeviceClass parent_class;
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void (*realize)(SCSIDevice *dev, Error **errp);
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int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
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void *hba_private);
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SCSIRequest *(*alloc_req)(SCSIDevice *s, uint32_t tag, uint32_t lun,
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uint8_t *buf, void *hba_private);
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void (*unit_attention_reported)(SCSIDevice *s);
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} SCSIDeviceClass;
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struct SCSIDevice
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{
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DeviceState qdev;
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VMChangeStateEntry *vmsentry;
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QEMUBH *bh;
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uint32_t id;
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BlockConf conf;
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SCSISense unit_attention;
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bool sense_is_ua;
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uint8_t sense[SCSI_SENSE_BUF_SIZE];
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uint32_t sense_len;
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QTAILQ_HEAD(, SCSIRequest) requests;
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uint32_t channel;
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uint32_t lun;
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int blocksize;
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int type;
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uint64_t max_lba;
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uint64_t wwn;
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uint64_t port_wwn;
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int scsi_version;
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int default_scsi_version;
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};
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extern const VMStateDescription vmstate_scsi_device;
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#define VMSTATE_SCSI_DEVICE(_field, _state) { \
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.name = (stringify(_field)), \
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.size = sizeof(SCSIDevice), \
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.vmsd = &vmstate_scsi_device, \
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.flags = VMS_STRUCT, \
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.offset = vmstate_offset_value(_state, _field, SCSIDevice), \
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}
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/* cdrom.c */
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int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track);
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int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf, int session_num);
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/* scsi-bus.c */
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struct SCSIReqOps {
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size_t size;
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void (*free_req)(SCSIRequest *req);
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int32_t (*send_command)(SCSIRequest *req, uint8_t *buf);
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void (*read_data)(SCSIRequest *req);
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void (*write_data)(SCSIRequest *req);
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uint8_t *(*get_buf)(SCSIRequest *req);
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void (*save_request)(QEMUFile *f, SCSIRequest *req);
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void (*load_request)(QEMUFile *f, SCSIRequest *req);
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};
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struct SCSIBusInfo {
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int tcq;
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int max_channel, max_target, max_lun;
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int (*parse_cdb)(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
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void *hba_private);
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void (*transfer_data)(SCSIRequest *req, uint32_t arg);
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void (*complete)(SCSIRequest *req, uint32_t arg, size_t resid);
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void (*cancel)(SCSIRequest *req);
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void (*change)(SCSIBus *bus, SCSIDevice *dev, SCSISense sense);
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QEMUSGList *(*get_sg_list)(SCSIRequest *req);
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void (*save_request)(QEMUFile *f, SCSIRequest *req);
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void *(*load_request)(QEMUFile *f, SCSIRequest *req);
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void (*free_request)(SCSIBus *bus, void *priv);
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};
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#define TYPE_SCSI_BUS "SCSI"
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#define SCSI_BUS(obj) OBJECT_CHECK(SCSIBus, (obj), TYPE_SCSI_BUS)
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struct SCSIBus {
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BusState qbus;
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int busnr;
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SCSISense unit_attention;
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const SCSIBusInfo *info;
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};
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void scsi_bus_new(SCSIBus *bus, size_t bus_size, DeviceState *host,
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const SCSIBusInfo *info, const char *bus_name);
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static inline SCSIBus *scsi_bus_from_device(SCSIDevice *d)
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{
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return DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
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}
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SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
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int unit, bool removable, int bootindex,
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bool share_rw,
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const char *serial, Error **errp);
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void scsi_bus_legacy_handle_cmdline(SCSIBus *bus);
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void scsi_legacy_handle_cmdline(void);
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SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
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uint32_t tag, uint32_t lun, void *hba_private);
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SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
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uint8_t *buf, void *hba_private);
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int32_t scsi_req_enqueue(SCSIRequest *req);
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SCSIRequest *scsi_req_ref(SCSIRequest *req);
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void scsi_req_unref(SCSIRequest *req);
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int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
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void *hba_private);
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int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf);
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void scsi_req_build_sense(SCSIRequest *req, SCSISense sense);
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void scsi_req_print(SCSIRequest *req);
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void scsi_req_continue(SCSIRequest *req);
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void scsi_req_data(SCSIRequest *req, int len);
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void scsi_req_complete(SCSIRequest *req, int status);
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uint8_t *scsi_req_get_buf(SCSIRequest *req);
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int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len);
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void scsi_req_cancel_complete(SCSIRequest *req);
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void scsi_req_cancel(SCSIRequest *req);
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void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier);
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void scsi_req_retry(SCSIRequest *req);
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void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense);
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void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense);
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void scsi_device_report_change(SCSIDevice *dev, SCSISense sense);
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void scsi_device_unit_attention_reported(SCSIDevice *dev);
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void scsi_generic_read_device_identification(SCSIDevice *dev);
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int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed);
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SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int target, int lun);
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/* scsi-generic.c. */
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extern const SCSIReqOps scsi_generic_req_ops;
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#endif
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