diff options
Diffstat (limited to 'hw/scsi/virtio-scsi.c')
-rw-r--r-- | hw/scsi/virtio-scsi.c | 52 |
1 files changed, 48 insertions, 4 deletions
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 91ead26ff8..dc705f0fa5 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -69,13 +69,19 @@ static void virtio_scsi_complete_req(VirtIOSCSIReq *req) VirtIODevice *vdev = VIRTIO_DEVICE(s); qemu_iovec_from_buf(&req->resp_iov, 0, &req->resp, req->resp_size); - virtqueue_push(vq, &req->elem, req->qsgl.size + req->resp_iov.size); + if (req->vring) { + assert(req->vq == NULL); + virtio_scsi_vring_push_notify(req); + } else { + virtqueue_push(vq, &req->elem, req->qsgl.size + req->resp_iov.size); + virtio_notify(vdev, vq); + } + if (req->sreq) { req->sreq->hba_private = NULL; scsi_req_unref(req->sreq); } virtio_scsi_free_req(req); - virtio_notify(vdev, vq); } static void virtio_scsi_bad_req(void) @@ -208,6 +214,11 @@ static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req) BusChild *kid; int target; + if (s->dataplane_started && bdrv_get_aio_context(d->conf.bs) != s->ctx) { + aio_context_acquire(s->ctx); + bdrv_set_aio_context(d->conf.bs, s->ctx); + aio_context_release(s->ctx); + } /* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */ req->resp.tmf.response = VIRTIO_SCSI_S_OK; @@ -346,6 +357,10 @@ static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) VirtIOSCSI *s = (VirtIOSCSI *)vdev; VirtIOSCSIReq *req; + if (s->ctx) { + virtio_scsi_dataplane_start(s); + return; + } while ((req = virtio_scsi_pop_req(s, vq))) { virtio_scsi_handle_ctrl_req(s, req); } @@ -457,6 +472,11 @@ void virtio_scsi_handle_cmd_req(VirtIOSCSI *s, VirtIOSCSIReq *req) virtio_scsi_complete_cmd_req(req); return; } + if (s->dataplane_started && bdrv_get_aio_context(d->conf.bs) != s->ctx) { + aio_context_acquire(s->ctx); + bdrv_set_aio_context(d->conf.bs, s->ctx); + aio_context_release(s->ctx); + } req->sreq = scsi_req_new(d, req->req.cmd.tag, virtio_scsi_get_lun(req->req.cmd.lun), req->req.cdb, req); @@ -481,6 +501,10 @@ static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) VirtIOSCSI *s = (VirtIOSCSI *)vdev; VirtIOSCSIReq *req; + if (s->ctx) { + virtio_scsi_dataplane_start(s); + return; + } while ((req = virtio_scsi_pop_req(s, vq))) { virtio_scsi_handle_cmd_req(s, req); } @@ -531,6 +555,9 @@ static void virtio_scsi_reset(VirtIODevice *vdev) VirtIOSCSI *s = VIRTIO_SCSI(vdev); VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); + if (s->ctx) { + virtio_scsi_dataplane_stop(s); + } s->resetting++; qbus_reset_all(&s->bus.qbus); s->resetting--; @@ -573,10 +600,19 @@ void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, return; } - req = virtio_scsi_pop_req(s, vs->event_vq); + if (s->dataplane_started) { + assert(s->ctx); + aio_context_acquire(s->ctx); + } + + if (s->dataplane_started) { + req = virtio_scsi_pop_req_vring(s, s->event_vring); + } else { + req = virtio_scsi_pop_req(s, vs->event_vq); + } if (!req) { s->events_dropped = true; - return; + goto out; } if (s->events_dropped) { @@ -605,12 +641,20 @@ void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, evt->lun[3] = dev->lun & 0xFF; } virtio_scsi_complete_req(req); +out: + if (s->dataplane_started) { + aio_context_release(s->ctx); + } } static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) { VirtIOSCSI *s = VIRTIO_SCSI(vdev); + if (s->ctx) { + virtio_scsi_dataplane_start(s); + return; + } if (s->events_dropped) { virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); } |