| /* |
| * Virtio SCSI HBA |
| * |
| * Copyright IBM, Corp. 2010 |
| * Copyright Red Hat, Inc. 2011 |
| * |
| * Authors: |
| * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> |
| * Paolo Bonzini <pbonzini@redhat.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| * See the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #include "hw/virtio/virtio-scsi.h" |
| #include "qemu/error-report.h" |
| #include <hw/scsi/scsi.h> |
| #include <block/scsi.h> |
| #include <hw/virtio/virtio-bus.h> |
| |
| typedef struct VirtIOSCSIReq { |
| VirtIOSCSI *dev; |
| VirtQueue *vq; |
| VirtQueueElement elem; |
| QEMUSGList qsgl; |
| SCSIRequest *sreq; |
| union { |
| char *buf; |
| VirtIOSCSICmdReq *cmd; |
| VirtIOSCSICtrlTMFReq *tmf; |
| VirtIOSCSICtrlANReq *an; |
| } req; |
| union { |
| char *buf; |
| VirtIOSCSICmdResp *cmd; |
| VirtIOSCSICtrlTMFResp *tmf; |
| VirtIOSCSICtrlANResp *an; |
| VirtIOSCSIEvent *event; |
| } resp; |
| } VirtIOSCSIReq; |
| |
| static inline int virtio_scsi_get_lun(uint8_t *lun) |
| { |
| return ((lun[2] << 8) | lun[3]) & 0x3FFF; |
| } |
| |
| static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun) |
| { |
| if (lun[0] != 1) { |
| return NULL; |
| } |
| if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) { |
| return NULL; |
| } |
| return scsi_device_find(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun)); |
| } |
| |
| static void virtio_scsi_complete_req(VirtIOSCSIReq *req) |
| { |
| VirtIOSCSI *s = req->dev; |
| VirtQueue *vq = req->vq; |
| VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| virtqueue_push(vq, &req->elem, req->qsgl.size + req->elem.in_sg[0].iov_len); |
| qemu_sglist_destroy(&req->qsgl); |
| if (req->sreq) { |
| req->sreq->hba_private = NULL; |
| scsi_req_unref(req->sreq); |
| } |
| g_free(req); |
| virtio_notify(vdev, vq); |
| } |
| |
| static void virtio_scsi_bad_req(void) |
| { |
| error_report("wrong size for virtio-scsi headers"); |
| exit(1); |
| } |
| |
| static void qemu_sgl_init_external(VirtIOSCSIReq *req, struct iovec *sg, |
| hwaddr *addr, int num) |
| { |
| QEMUSGList *qsgl = &req->qsgl; |
| |
| qemu_sglist_init(qsgl, DEVICE(req->dev), num, &address_space_memory); |
| while (num--) { |
| qemu_sglist_add(qsgl, *(addr++), (sg++)->iov_len); |
| } |
| } |
| |
| static void virtio_scsi_parse_req(VirtIOSCSI *s, VirtQueue *vq, |
| VirtIOSCSIReq *req) |
| { |
| assert(req->elem.in_num); |
| req->vq = vq; |
| req->dev = s; |
| req->sreq = NULL; |
| if (req->elem.out_num) { |
| req->req.buf = req->elem.out_sg[0].iov_base; |
| } |
| req->resp.buf = req->elem.in_sg[0].iov_base; |
| |
| if (req->elem.out_num > 1) { |
| qemu_sgl_init_external(req, &req->elem.out_sg[1], |
| &req->elem.out_addr[1], |
| req->elem.out_num - 1); |
| } else { |
| qemu_sgl_init_external(req, &req->elem.in_sg[1], |
| &req->elem.in_addr[1], |
| req->elem.in_num - 1); |
| } |
| } |
| |
| static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq) |
| { |
| VirtIOSCSIReq *req; |
| req = g_malloc(sizeof(*req)); |
| if (!virtqueue_pop(vq, &req->elem)) { |
| g_free(req); |
| return NULL; |
| } |
| |
| virtio_scsi_parse_req(s, vq, req); |
| return req; |
| } |
| |
| static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) |
| { |
| VirtIOSCSIReq *req = sreq->hba_private; |
| VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev); |
| uint32_t n = virtio_queue_get_id(req->vq) - 2; |
| |
| assert(n < vs->conf.num_queues); |
| qemu_put_be32s(f, &n); |
| qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); |
| } |
| |
| static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq) |
| { |
| SCSIBus *bus = sreq->bus; |
| VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
| VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
| VirtIOSCSIReq *req; |
| uint32_t n; |
| |
| req = g_malloc(sizeof(*req)); |
| qemu_get_be32s(f, &n); |
| assert(n < vs->conf.num_queues); |
| qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); |
| virtio_scsi_parse_req(s, vs->cmd_vqs[n], req); |
| |
| scsi_req_ref(sreq); |
| req->sreq = sreq; |
| if (req->sreq->cmd.mode != SCSI_XFER_NONE) { |
| int req_mode = |
| (req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV); |
| |
| assert(req->sreq->cmd.mode == req_mode); |
| } |
| return req; |
| } |
| |
| static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req) |
| { |
| SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf->lun); |
| SCSIRequest *r, *next; |
| BusChild *kid; |
| int target; |
| |
| /* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */ |
| req->resp.tmf->response = VIRTIO_SCSI_S_OK; |
| |
| switch (req->req.tmf->subtype) { |
| case VIRTIO_SCSI_T_TMF_ABORT_TASK: |
| case VIRTIO_SCSI_T_TMF_QUERY_TASK: |
| if (!d) { |
| goto fail; |
| } |
| if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { |
| goto incorrect_lun; |
| } |
| QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { |
| VirtIOSCSIReq *cmd_req = r->hba_private; |
| if (cmd_req && cmd_req->req.cmd->tag == req->req.tmf->tag) { |
| break; |
| } |
| } |
| if (r) { |
| /* |
| * Assert that the request has not been completed yet, we |
| * check for it in the loop above. |
| */ |
| assert(r->hba_private); |
| if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) { |
| /* "If the specified command is present in the task set, then |
| * return a service response set to FUNCTION SUCCEEDED". |
| */ |
| req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
| } else { |
| scsi_req_cancel(r); |
| } |
| } |
| break; |
| |
| case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET: |
| if (!d) { |
| goto fail; |
| } |
| if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { |
| goto incorrect_lun; |
| } |
| s->resetting++; |
| qdev_reset_all(&d->qdev); |
| s->resetting--; |
| break; |
| |
| case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET: |
| case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET: |
| case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET: |
| if (!d) { |
| goto fail; |
| } |
| if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { |
| goto incorrect_lun; |
| } |
| QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { |
| if (r->hba_private) { |
| if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) { |
| /* "If there is any command present in the task set, then |
| * return a service response set to FUNCTION SUCCEEDED". |
| */ |
| req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
| break; |
| } else { |
| scsi_req_cancel(r); |
| } |
| } |
| } |
| break; |
| |
| case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET: |
| target = req->req.tmf->lun[1]; |
| s->resetting++; |
| QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { |
| d = DO_UPCAST(SCSIDevice, qdev, kid->child); |
| if (d->channel == 0 && d->id == target) { |
| qdev_reset_all(&d->qdev); |
| } |
| } |
| s->resetting--; |
| break; |
| |
| case VIRTIO_SCSI_T_TMF_CLEAR_ACA: |
| default: |
| req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_REJECTED; |
| break; |
| } |
| |
| return; |
| |
| incorrect_lun: |
| req->resp.tmf->response = VIRTIO_SCSI_S_INCORRECT_LUN; |
| return; |
| |
| fail: |
| req->resp.tmf->response = VIRTIO_SCSI_S_BAD_TARGET; |
| } |
| |
| static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
| { |
| VirtIOSCSI *s = (VirtIOSCSI *)vdev; |
| VirtIOSCSIReq *req; |
| |
| while ((req = virtio_scsi_pop_req(s, vq))) { |
| int out_size, in_size; |
| if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
| virtio_scsi_bad_req(); |
| continue; |
| } |
| |
| out_size = req->elem.out_sg[0].iov_len; |
| in_size = req->elem.in_sg[0].iov_len; |
| if (req->req.tmf->type == VIRTIO_SCSI_T_TMF) { |
| if (out_size < sizeof(VirtIOSCSICtrlTMFReq) || |
| in_size < sizeof(VirtIOSCSICtrlTMFResp)) { |
| virtio_scsi_bad_req(); |
| } |
| virtio_scsi_do_tmf(s, req); |
| |
| } else if (req->req.tmf->type == VIRTIO_SCSI_T_AN_QUERY || |
| req->req.tmf->type == VIRTIO_SCSI_T_AN_SUBSCRIBE) { |
| if (out_size < sizeof(VirtIOSCSICtrlANReq) || |
| in_size < sizeof(VirtIOSCSICtrlANResp)) { |
| virtio_scsi_bad_req(); |
| } |
| req->resp.an->event_actual = 0; |
| req->resp.an->response = VIRTIO_SCSI_S_OK; |
| } |
| virtio_scsi_complete_req(req); |
| } |
| } |
| |
| static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, |
| size_t resid) |
| { |
| VirtIOSCSIReq *req = r->hba_private; |
| uint32_t sense_len; |
| |
| req->resp.cmd->response = VIRTIO_SCSI_S_OK; |
| req->resp.cmd->status = status; |
| if (req->resp.cmd->status == GOOD) { |
| req->resp.cmd->resid = tswap32(resid); |
| } else { |
| req->resp.cmd->resid = 0; |
| sense_len = scsi_req_get_sense(r, req->resp.cmd->sense, |
| VIRTIO_SCSI_SENSE_SIZE); |
| req->resp.cmd->sense_len = tswap32(sense_len); |
| } |
| virtio_scsi_complete_req(req); |
| } |
| |
| static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r) |
| { |
| VirtIOSCSIReq *req = r->hba_private; |
| |
| return &req->qsgl; |
| } |
| |
| static void virtio_scsi_request_cancelled(SCSIRequest *r) |
| { |
| VirtIOSCSIReq *req = r->hba_private; |
| |
| if (!req) { |
| return; |
| } |
| if (req->dev->resetting) { |
| req->resp.cmd->response = VIRTIO_SCSI_S_RESET; |
| } else { |
| req->resp.cmd->response = VIRTIO_SCSI_S_ABORTED; |
| } |
| virtio_scsi_complete_req(req); |
| } |
| |
| static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) |
| { |
| req->resp.cmd->response = VIRTIO_SCSI_S_FAILURE; |
| virtio_scsi_complete_req(req); |
| } |
| |
| static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) |
| { |
| /* use non-QOM casts in the data path */ |
| VirtIOSCSI *s = (VirtIOSCSI *)vdev; |
| VirtIOSCSICommon *vs = &s->parent_obj; |
| |
| VirtIOSCSIReq *req; |
| int n; |
| |
| while ((req = virtio_scsi_pop_req(s, vq))) { |
| SCSIDevice *d; |
| int out_size, in_size; |
| if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
| virtio_scsi_bad_req(); |
| } |
| |
| out_size = req->elem.out_sg[0].iov_len; |
| in_size = req->elem.in_sg[0].iov_len; |
| if (out_size < sizeof(VirtIOSCSICmdReq) + vs->cdb_size || |
| in_size < sizeof(VirtIOSCSICmdResp) + vs->sense_size) { |
| virtio_scsi_bad_req(); |
| } |
| |
| if (req->elem.out_num > 1 && req->elem.in_num > 1) { |
| virtio_scsi_fail_cmd_req(req); |
| continue; |
| } |
| |
| d = virtio_scsi_device_find(s, req->req.cmd->lun); |
| if (!d) { |
| req->resp.cmd->response = VIRTIO_SCSI_S_BAD_TARGET; |
| virtio_scsi_complete_req(req); |
| continue; |
| } |
| req->sreq = scsi_req_new(d, req->req.cmd->tag, |
| virtio_scsi_get_lun(req->req.cmd->lun), |
| req->req.cmd->cdb, req); |
| |
| if (req->sreq->cmd.mode != SCSI_XFER_NONE) { |
| int req_mode = |
| (req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV); |
| |
| if (req->sreq->cmd.mode != req_mode || |
| req->sreq->cmd.xfer > req->qsgl.size) { |
| req->resp.cmd->response = VIRTIO_SCSI_S_OVERRUN; |
| virtio_scsi_complete_req(req); |
| continue; |
| } |
| } |
| |
| n = scsi_req_enqueue(req->sreq); |
| if (n) { |
| scsi_req_continue(req->sreq); |
| } |
| } |
| } |
| |
| static void virtio_scsi_get_config(VirtIODevice *vdev, |
| uint8_t *config) |
| { |
| VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; |
| VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev); |
| |
| stl_raw(&scsiconf->num_queues, s->conf.num_queues); |
| stl_raw(&scsiconf->seg_max, 128 - 2); |
| stl_raw(&scsiconf->max_sectors, s->conf.max_sectors); |
| stl_raw(&scsiconf->cmd_per_lun, s->conf.cmd_per_lun); |
| stl_raw(&scsiconf->event_info_size, sizeof(VirtIOSCSIEvent)); |
| stl_raw(&scsiconf->sense_size, s->sense_size); |
| stl_raw(&scsiconf->cdb_size, s->cdb_size); |
| stw_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); |
| stw_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); |
| stl_raw(&scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); |
| } |
| |
| static void virtio_scsi_set_config(VirtIODevice *vdev, |
| const uint8_t *config) |
| { |
| VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; |
| VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
| |
| if ((uint32_t) ldl_raw(&scsiconf->sense_size) >= 65536 || |
| (uint32_t) ldl_raw(&scsiconf->cdb_size) >= 256) { |
| error_report("bad data written to virtio-scsi configuration space"); |
| exit(1); |
| } |
| |
| vs->sense_size = ldl_raw(&scsiconf->sense_size); |
| vs->cdb_size = ldl_raw(&scsiconf->cdb_size); |
| } |
| |
| static uint32_t virtio_scsi_get_features(VirtIODevice *vdev, |
| uint32_t requested_features) |
| { |
| return requested_features; |
| } |
| |
| static void virtio_scsi_reset(VirtIODevice *vdev) |
| { |
| VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
| VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
| |
| s->resetting++; |
| qbus_reset_all(&s->bus.qbus); |
| s->resetting--; |
| |
| vs->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
| vs->cdb_size = VIRTIO_SCSI_CDB_SIZE; |
| s->events_dropped = false; |
| } |
| |
| /* The device does not have anything to save beyond the virtio data. |
| * Request data is saved with callbacks from SCSI devices. |
| */ |
| static void virtio_scsi_save(QEMUFile *f, void *opaque) |
| { |
| VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
| virtio_save(vdev, f); |
| } |
| |
| static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id) |
| { |
| VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
| int ret; |
| |
| ret = virtio_load(vdev, f); |
| if (ret) { |
| return ret; |
| } |
| return 0; |
| } |
| |
| static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, |
| uint32_t event, uint32_t reason) |
| { |
| VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
| VirtIOSCSIReq *req = virtio_scsi_pop_req(s, vs->event_vq); |
| VirtIOSCSIEvent *evt; |
| VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| int in_size; |
| |
| if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { |
| return; |
| } |
| |
| if (!req) { |
| s->events_dropped = true; |
| return; |
| } |
| |
| if (req->elem.out_num || req->elem.in_num != 1) { |
| virtio_scsi_bad_req(); |
| } |
| |
| if (s->events_dropped) { |
| event |= VIRTIO_SCSI_T_EVENTS_MISSED; |
| s->events_dropped = false; |
| } |
| |
| in_size = req->elem.in_sg[0].iov_len; |
| if (in_size < sizeof(VirtIOSCSIEvent)) { |
| virtio_scsi_bad_req(); |
| } |
| |
| evt = req->resp.event; |
| memset(evt, 0, sizeof(VirtIOSCSIEvent)); |
| evt->event = event; |
| evt->reason = reason; |
| if (!dev) { |
| assert(event == VIRTIO_SCSI_T_NO_EVENT); |
| } else { |
| evt->lun[0] = 1; |
| evt->lun[1] = dev->id; |
| |
| /* Linux wants us to keep the same encoding we use for REPORT LUNS. */ |
| if (dev->lun >= 256) { |
| evt->lun[2] = (dev->lun >> 8) | 0x40; |
| } |
| evt->lun[3] = dev->lun & 0xFF; |
| } |
| virtio_scsi_complete_req(req); |
| } |
| |
| static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) |
| { |
| VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
| |
| if (s->events_dropped) { |
| virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); |
| } |
| } |
| |
| static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense) |
| { |
| VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
| VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| |
| if (((vdev->guest_features >> VIRTIO_SCSI_F_CHANGE) & 1) && |
| dev->type != TYPE_ROM) { |
| virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE, |
| sense.asc | (sense.ascq << 8)); |
| } |
| } |
| |
| static void virtio_scsi_hotplug(SCSIBus *bus, SCSIDevice *dev) |
| { |
| VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
| VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| |
| if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
| virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
| VIRTIO_SCSI_EVT_RESET_RESCAN); |
| } |
| } |
| |
| static void virtio_scsi_hot_unplug(SCSIBus *bus, SCSIDevice *dev) |
| { |
| VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
| VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| |
| if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
| virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
| VIRTIO_SCSI_EVT_RESET_REMOVED); |
| } |
| } |
| |
| static struct SCSIBusInfo virtio_scsi_scsi_info = { |
| .tcq = true, |
| .max_channel = VIRTIO_SCSI_MAX_CHANNEL, |
| .max_target = VIRTIO_SCSI_MAX_TARGET, |
| .max_lun = VIRTIO_SCSI_MAX_LUN, |
| |
| .complete = virtio_scsi_command_complete, |
| .cancel = virtio_scsi_request_cancelled, |
| .change = virtio_scsi_change, |
| .hotplug = virtio_scsi_hotplug, |
| .hot_unplug = virtio_scsi_hot_unplug, |
| .get_sg_list = virtio_scsi_get_sg_list, |
| .save_request = virtio_scsi_save_request, |
| .load_request = virtio_scsi_load_request, |
| }; |
| |
| void virtio_scsi_common_realize(DeviceState *dev, Error **errp) |
| { |
| VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev); |
| int i; |
| |
| virtio_init(vdev, "virtio-scsi", VIRTIO_ID_SCSI, |
| sizeof(VirtIOSCSIConfig)); |
| |
| s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *)); |
| s->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
| s->cdb_size = VIRTIO_SCSI_CDB_SIZE; |
| |
| s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
| virtio_scsi_handle_ctrl); |
| s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
| virtio_scsi_handle_event); |
| for (i = 0; i < s->conf.num_queues; i++) { |
| s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
| virtio_scsi_handle_cmd); |
| } |
| } |
| |
| static void virtio_scsi_device_realize(DeviceState *dev, Error **errp) |
| { |
| VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| VirtIOSCSI *s = VIRTIO_SCSI(dev); |
| static int virtio_scsi_id; |
| Error *err = NULL; |
| |
| virtio_scsi_common_realize(dev, &err); |
| if (err != NULL) { |
| error_propagate(errp, err); |
| return; |
| } |
| |
| scsi_bus_new(&s->bus, sizeof(s->bus), dev, |
| &virtio_scsi_scsi_info, vdev->bus_name); |
| |
| if (!dev->hotplugged) { |
| scsi_bus_legacy_handle_cmdline(&s->bus, &err); |
| if (err != NULL) { |
| error_propagate(errp, err); |
| return; |
| } |
| } |
| |
| register_savevm(dev, "virtio-scsi", virtio_scsi_id++, 1, |
| virtio_scsi_save, virtio_scsi_load, s); |
| } |
| |
| void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp) |
| { |
| VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev); |
| |
| g_free(vs->cmd_vqs); |
| virtio_cleanup(vdev); |
| } |
| |
| static void virtio_scsi_device_unrealize(DeviceState *dev, Error **errp) |
| { |
| VirtIOSCSI *s = VIRTIO_SCSI(dev); |
| |
| unregister_savevm(dev, "virtio-scsi", s); |
| |
| virtio_scsi_common_unrealize(dev, errp); |
| } |
| |
| static Property virtio_scsi_properties[] = { |
| DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, parent_obj.conf), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void virtio_scsi_common_class_init(ObjectClass *klass, void *data) |
| { |
| VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| vdc->get_config = virtio_scsi_get_config; |
| set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
| } |
| |
| static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
| |
| dc->props = virtio_scsi_properties; |
| set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); |
| vdc->realize = virtio_scsi_device_realize; |
| vdc->unrealize = virtio_scsi_device_unrealize; |
| vdc->set_config = virtio_scsi_set_config; |
| vdc->get_features = virtio_scsi_get_features; |
| vdc->reset = virtio_scsi_reset; |
| } |
| |
| static const TypeInfo virtio_scsi_common_info = { |
| .name = TYPE_VIRTIO_SCSI_COMMON, |
| .parent = TYPE_VIRTIO_DEVICE, |
| .instance_size = sizeof(VirtIOSCSICommon), |
| .abstract = true, |
| .class_init = virtio_scsi_common_class_init, |
| }; |
| |
| static const TypeInfo virtio_scsi_info = { |
| .name = TYPE_VIRTIO_SCSI, |
| .parent = TYPE_VIRTIO_SCSI_COMMON, |
| .instance_size = sizeof(VirtIOSCSI), |
| .class_init = virtio_scsi_class_init, |
| }; |
| |
| static void virtio_register_types(void) |
| { |
| type_register_static(&virtio_scsi_common_info); |
| type_register_static(&virtio_scsi_info); |
| } |
| |
| type_init(virtio_register_types) |