root / hw / scsi / virtio-scsi.c @ 6f32a6b4
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/*
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* Virtio SCSI HBA
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*
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* Copyright IBM, Corp. 2010
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* Copyright Red Hat, Inc. 2011
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*
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* Authors:
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* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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* Paolo Bonzini <pbonzini@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "hw/virtio/virtio-scsi.h" |
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#include "qemu/error-report.h" |
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#include <hw/scsi/scsi.h> |
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#include <block/scsi.h> |
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#include <hw/virtio/virtio-bus.h> |
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|
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typedef struct VirtIOSCSIReq { |
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VirtIOSCSI *dev; |
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VirtQueue *vq; |
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VirtQueueElement elem; |
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QEMUSGList qsgl; |
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SCSIRequest *sreq; |
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union {
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char *buf;
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VirtIOSCSICmdReq *cmd; |
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VirtIOSCSICtrlTMFReq *tmf; |
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VirtIOSCSICtrlANReq *an; |
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} req; |
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union {
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char *buf;
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VirtIOSCSICmdResp *cmd; |
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VirtIOSCSICtrlTMFResp *tmf; |
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VirtIOSCSICtrlANResp *an; |
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VirtIOSCSIEvent *event; |
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} resp; |
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} VirtIOSCSIReq; |
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|
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static inline int virtio_scsi_get_lun(uint8_t *lun) |
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{ |
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return ((lun[2] << 8) | lun[3]) & 0x3FFF; |
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} |
47 |
|
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static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun) |
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{ |
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if (lun[0] != 1) { |
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return NULL; |
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} |
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if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) { |
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return NULL; |
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} |
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return scsi_device_find(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun)); |
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} |
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|
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static void virtio_scsi_complete_req(VirtIOSCSIReq *req) |
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{ |
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VirtIOSCSI *s = req->dev; |
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VirtQueue *vq = req->vq; |
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VirtIODevice *vdev = VIRTIO_DEVICE(s); |
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virtqueue_push(vq, &req->elem, req->qsgl.size + req->elem.in_sg[0].iov_len);
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qemu_sglist_destroy(&req->qsgl); |
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if (req->sreq) {
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req->sreq->hba_private = NULL;
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scsi_req_unref(req->sreq); |
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} |
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g_free(req); |
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virtio_notify(vdev, vq); |
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} |
73 |
|
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static void virtio_scsi_bad_req(void) |
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{ |
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error_report("wrong size for virtio-scsi headers");
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exit(1);
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} |
79 |
|
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static void qemu_sgl_init_external(QEMUSGList *qsgl, struct iovec *sg, |
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hwaddr *addr, int num)
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{ |
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qemu_sglist_init(qsgl, num, &dma_context_memory); |
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while (num--) {
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qemu_sglist_add(qsgl, *(addr++), (sg++)->iov_len); |
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} |
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} |
88 |
|
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static void virtio_scsi_parse_req(VirtIOSCSI *s, VirtQueue *vq, |
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VirtIOSCSIReq *req) |
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{ |
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assert(req->elem.in_num); |
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req->vq = vq; |
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req->dev = s; |
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req->sreq = NULL;
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if (req->elem.out_num) {
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req->req.buf = req->elem.out_sg[0].iov_base;
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} |
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req->resp.buf = req->elem.in_sg[0].iov_base;
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|
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if (req->elem.out_num > 1) { |
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qemu_sgl_init_external(&req->qsgl, &req->elem.out_sg[1],
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&req->elem.out_addr[1],
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req->elem.out_num - 1);
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} else {
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qemu_sgl_init_external(&req->qsgl, &req->elem.in_sg[1],
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&req->elem.in_addr[1],
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req->elem.in_num - 1);
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} |
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} |
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static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq)
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{ |
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VirtIOSCSIReq *req; |
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req = g_malloc(sizeof(*req));
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if (!virtqueue_pop(vq, &req->elem)) {
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g_free(req); |
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return NULL; |
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} |
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virtio_scsi_parse_req(s, vq, req); |
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return req;
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} |
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static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) |
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{ |
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VirtIOSCSIReq *req = sreq->hba_private; |
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev); |
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uint32_t n = virtio_queue_get_id(req->vq) - 2;
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|
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assert(n < vs->conf.num_queues); |
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qemu_put_be32s(f, &n); |
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qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); |
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} |
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|
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static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq) |
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{ |
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SCSIBus *bus = sreq->bus; |
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VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
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VirtIOSCSIReq *req; |
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uint32_t n; |
143 |
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req = g_malloc(sizeof(*req));
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qemu_get_be32s(f, &n); |
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assert(n < vs->conf.num_queues); |
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qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); |
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virtio_scsi_parse_req(s, vs->cmd_vqs[n], req); |
149 |
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scsi_req_ref(sreq); |
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req->sreq = sreq; |
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if (req->sreq->cmd.mode != SCSI_XFER_NONE) {
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int req_mode =
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(req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV);
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assert(req->sreq->cmd.mode == req_mode); |
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} |
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return req;
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} |
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static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req) |
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{ |
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SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf->lun); |
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SCSIRequest *r, *next; |
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BusChild *kid; |
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int target;
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/* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */
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req->resp.tmf->response = VIRTIO_SCSI_S_OK; |
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switch (req->req.tmf->subtype) {
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case VIRTIO_SCSI_T_TMF_ABORT_TASK:
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case VIRTIO_SCSI_T_TMF_QUERY_TASK:
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if (!d) {
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goto fail;
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} |
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if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) {
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goto incorrect_lun;
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} |
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QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { |
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VirtIOSCSIReq *cmd_req = r->hba_private; |
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if (cmd_req && cmd_req->req.cmd->tag == req->req.tmf->tag) {
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break;
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} |
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} |
186 |
if (r) {
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/*
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* Assert that the request has not been completed yet, we
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* check for it in the loop above.
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*/
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assert(r->hba_private); |
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if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) {
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/* "If the specified command is present in the task set, then
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* return a service response set to FUNCTION SUCCEEDED".
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*/
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req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
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} else {
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scsi_req_cancel(r); |
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} |
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} |
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break;
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case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET:
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if (!d) {
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goto fail;
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} |
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if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) {
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goto incorrect_lun;
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} |
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s->resetting++; |
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qdev_reset_all(&d->qdev); |
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s->resetting--; |
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break;
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case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET:
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case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET:
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case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET:
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if (!d) {
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goto fail;
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} |
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if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) {
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goto incorrect_lun;
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} |
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QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { |
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if (r->hba_private) {
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if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) {
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/* "If there is any command present in the task set, then
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* return a service response set to FUNCTION SUCCEEDED".
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*/
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req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; |
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break;
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} else {
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scsi_req_cancel(r); |
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} |
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} |
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} |
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break;
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case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
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target = req->req.tmf->lun[1];
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s->resetting++; |
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QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { |
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d = DO_UPCAST(SCSIDevice, qdev, kid->child); |
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if (d->channel == 0 && d->id == target) { |
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qdev_reset_all(&d->qdev); |
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} |
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} |
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s->resetting--; |
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break;
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case VIRTIO_SCSI_T_TMF_CLEAR_ACA:
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default:
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req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_REJECTED; |
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break;
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} |
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return;
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incorrect_lun:
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req->resp.tmf->response = VIRTIO_SCSI_S_INCORRECT_LUN; |
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return;
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fail:
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req->resp.tmf->response = VIRTIO_SCSI_S_BAD_TARGET; |
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} |
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static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
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{ |
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VirtIOSCSI *s = (VirtIOSCSI *)vdev; |
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VirtIOSCSIReq *req; |
271 |
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while ((req = virtio_scsi_pop_req(s, vq))) {
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int out_size, in_size;
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if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
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virtio_scsi_bad_req(); |
276 |
continue;
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} |
278 |
|
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out_size = req->elem.out_sg[0].iov_len;
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in_size = req->elem.in_sg[0].iov_len;
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if (req->req.tmf->type == VIRTIO_SCSI_T_TMF) {
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if (out_size < sizeof(VirtIOSCSICtrlTMFReq) || |
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in_size < sizeof(VirtIOSCSICtrlTMFResp)) {
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virtio_scsi_bad_req(); |
285 |
} |
286 |
virtio_scsi_do_tmf(s, req); |
287 |
|
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} else if (req->req.tmf->type == VIRTIO_SCSI_T_AN_QUERY || |
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req->req.tmf->type == VIRTIO_SCSI_T_AN_SUBSCRIBE) { |
290 |
if (out_size < sizeof(VirtIOSCSICtrlANReq) || |
291 |
in_size < sizeof(VirtIOSCSICtrlANResp)) {
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virtio_scsi_bad_req(); |
293 |
} |
294 |
req->resp.an->event_actual = 0;
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req->resp.an->response = VIRTIO_SCSI_S_OK; |
296 |
} |
297 |
virtio_scsi_complete_req(req); |
298 |
} |
299 |
} |
300 |
|
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static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, |
302 |
size_t resid) |
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{ |
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VirtIOSCSIReq *req = r->hba_private; |
305 |
uint32_t sense_len; |
306 |
|
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req->resp.cmd->response = VIRTIO_SCSI_S_OK; |
308 |
req->resp.cmd->status = status; |
309 |
if (req->resp.cmd->status == GOOD) {
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req->resp.cmd->resid = tswap32(resid); |
311 |
} else {
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312 |
req->resp.cmd->resid = 0;
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sense_len = scsi_req_get_sense(r, req->resp.cmd->sense, |
314 |
VIRTIO_SCSI_SENSE_SIZE); |
315 |
req->resp.cmd->sense_len = tswap32(sense_len); |
316 |
} |
317 |
virtio_scsi_complete_req(req); |
318 |
} |
319 |
|
320 |
static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r)
|
321 |
{ |
322 |
VirtIOSCSIReq *req = r->hba_private; |
323 |
|
324 |
return &req->qsgl;
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} |
326 |
|
327 |
static void virtio_scsi_request_cancelled(SCSIRequest *r) |
328 |
{ |
329 |
VirtIOSCSIReq *req = r->hba_private; |
330 |
|
331 |
if (!req) {
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332 |
return;
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333 |
} |
334 |
if (req->dev->resetting) {
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335 |
req->resp.cmd->response = VIRTIO_SCSI_S_RESET; |
336 |
} else {
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337 |
req->resp.cmd->response = VIRTIO_SCSI_S_ABORTED; |
338 |
} |
339 |
virtio_scsi_complete_req(req); |
340 |
} |
341 |
|
342 |
static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) |
343 |
{ |
344 |
req->resp.cmd->response = VIRTIO_SCSI_S_FAILURE; |
345 |
virtio_scsi_complete_req(req); |
346 |
} |
347 |
|
348 |
static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) |
349 |
{ |
350 |
/* use non-QOM casts in the data path */
|
351 |
VirtIOSCSI *s = (VirtIOSCSI *)vdev; |
352 |
VirtIOSCSICommon *vs = &s->parent_obj; |
353 |
|
354 |
VirtIOSCSIReq *req; |
355 |
int n;
|
356 |
|
357 |
while ((req = virtio_scsi_pop_req(s, vq))) {
|
358 |
SCSIDevice *d; |
359 |
int out_size, in_size;
|
360 |
if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
361 |
virtio_scsi_bad_req(); |
362 |
} |
363 |
|
364 |
out_size = req->elem.out_sg[0].iov_len;
|
365 |
in_size = req->elem.in_sg[0].iov_len;
|
366 |
if (out_size < sizeof(VirtIOSCSICmdReq) + vs->cdb_size || |
367 |
in_size < sizeof(VirtIOSCSICmdResp) + vs->sense_size) {
|
368 |
virtio_scsi_bad_req(); |
369 |
} |
370 |
|
371 |
if (req->elem.out_num > 1 && req->elem.in_num > 1) { |
372 |
virtio_scsi_fail_cmd_req(req); |
373 |
continue;
|
374 |
} |
375 |
|
376 |
d = virtio_scsi_device_find(s, req->req.cmd->lun); |
377 |
if (!d) {
|
378 |
req->resp.cmd->response = VIRTIO_SCSI_S_BAD_TARGET; |
379 |
virtio_scsi_complete_req(req); |
380 |
continue;
|
381 |
} |
382 |
req->sreq = scsi_req_new(d, req->req.cmd->tag, |
383 |
virtio_scsi_get_lun(req->req.cmd->lun), |
384 |
req->req.cmd->cdb, req); |
385 |
|
386 |
if (req->sreq->cmd.mode != SCSI_XFER_NONE) {
|
387 |
int req_mode =
|
388 |
(req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV);
|
389 |
|
390 |
if (req->sreq->cmd.mode != req_mode ||
|
391 |
req->sreq->cmd.xfer > req->qsgl.size) { |
392 |
req->resp.cmd->response = VIRTIO_SCSI_S_OVERRUN; |
393 |
virtio_scsi_complete_req(req); |
394 |
continue;
|
395 |
} |
396 |
} |
397 |
|
398 |
n = scsi_req_enqueue(req->sreq); |
399 |
if (n) {
|
400 |
scsi_req_continue(req->sreq); |
401 |
} |
402 |
} |
403 |
} |
404 |
|
405 |
static void virtio_scsi_get_config(VirtIODevice *vdev, |
406 |
uint8_t *config) |
407 |
{ |
408 |
VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; |
409 |
VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev); |
410 |
|
411 |
stl_raw(&scsiconf->num_queues, s->conf.num_queues); |
412 |
stl_raw(&scsiconf->seg_max, 128 - 2); |
413 |
stl_raw(&scsiconf->max_sectors, s->conf.max_sectors); |
414 |
stl_raw(&scsiconf->cmd_per_lun, s->conf.cmd_per_lun); |
415 |
stl_raw(&scsiconf->event_info_size, sizeof(VirtIOSCSIEvent));
|
416 |
stl_raw(&scsiconf->sense_size, s->sense_size); |
417 |
stl_raw(&scsiconf->cdb_size, s->cdb_size); |
418 |
stw_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); |
419 |
stw_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); |
420 |
stl_raw(&scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); |
421 |
} |
422 |
|
423 |
static void virtio_scsi_set_config(VirtIODevice *vdev, |
424 |
const uint8_t *config)
|
425 |
{ |
426 |
VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; |
427 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
428 |
|
429 |
if ((uint32_t) ldl_raw(&scsiconf->sense_size) >= 65536 || |
430 |
(uint32_t) ldl_raw(&scsiconf->cdb_size) >= 256) {
|
431 |
error_report("bad data written to virtio-scsi configuration space");
|
432 |
exit(1);
|
433 |
} |
434 |
|
435 |
vs->sense_size = ldl_raw(&scsiconf->sense_size); |
436 |
vs->cdb_size = ldl_raw(&scsiconf->cdb_size); |
437 |
} |
438 |
|
439 |
static uint32_t virtio_scsi_get_features(VirtIODevice *vdev,
|
440 |
uint32_t requested_features) |
441 |
{ |
442 |
return requested_features;
|
443 |
} |
444 |
|
445 |
static void virtio_scsi_reset(VirtIODevice *vdev) |
446 |
{ |
447 |
VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
448 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
449 |
|
450 |
s->resetting++; |
451 |
qbus_reset_all(&s->bus.qbus); |
452 |
s->resetting--; |
453 |
|
454 |
vs->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
455 |
vs->cdb_size = VIRTIO_SCSI_CDB_SIZE; |
456 |
s->events_dropped = false;
|
457 |
} |
458 |
|
459 |
/* The device does not have anything to save beyond the virtio data.
|
460 |
* Request data is saved with callbacks from SCSI devices.
|
461 |
*/
|
462 |
static void virtio_scsi_save(QEMUFile *f, void *opaque) |
463 |
{ |
464 |
VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
465 |
virtio_save(vdev, f); |
466 |
} |
467 |
|
468 |
static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id) |
469 |
{ |
470 |
VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
471 |
int ret;
|
472 |
|
473 |
ret = virtio_load(vdev, f); |
474 |
if (ret) {
|
475 |
return ret;
|
476 |
} |
477 |
return 0; |
478 |
} |
479 |
|
480 |
static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, |
481 |
uint32_t event, uint32_t reason) |
482 |
{ |
483 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
484 |
VirtIOSCSIReq *req = virtio_scsi_pop_req(s, vs->event_vq); |
485 |
VirtIOSCSIEvent *evt; |
486 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
487 |
int in_size;
|
488 |
|
489 |
if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
490 |
return;
|
491 |
} |
492 |
|
493 |
if (!req) {
|
494 |
s->events_dropped = true;
|
495 |
return;
|
496 |
} |
497 |
|
498 |
if (req->elem.out_num || req->elem.in_num != 1) { |
499 |
virtio_scsi_bad_req(); |
500 |
} |
501 |
|
502 |
if (s->events_dropped) {
|
503 |
event |= VIRTIO_SCSI_T_EVENTS_MISSED; |
504 |
s->events_dropped = false;
|
505 |
} |
506 |
|
507 |
in_size = req->elem.in_sg[0].iov_len;
|
508 |
if (in_size < sizeof(VirtIOSCSIEvent)) { |
509 |
virtio_scsi_bad_req(); |
510 |
} |
511 |
|
512 |
evt = req->resp.event; |
513 |
memset(evt, 0, sizeof(VirtIOSCSIEvent)); |
514 |
evt->event = event; |
515 |
evt->reason = reason; |
516 |
if (!dev) {
|
517 |
assert(event == VIRTIO_SCSI_T_NO_EVENT); |
518 |
} else {
|
519 |
evt->lun[0] = 1; |
520 |
evt->lun[1] = dev->id;
|
521 |
|
522 |
/* Linux wants us to keep the same encoding we use for REPORT LUNS. */
|
523 |
if (dev->lun >= 256) { |
524 |
evt->lun[2] = (dev->lun >> 8) | 0x40; |
525 |
} |
526 |
evt->lun[3] = dev->lun & 0xFF; |
527 |
} |
528 |
virtio_scsi_complete_req(req); |
529 |
} |
530 |
|
531 |
static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) |
532 |
{ |
533 |
VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
534 |
|
535 |
if (s->events_dropped) {
|
536 |
virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); |
537 |
} |
538 |
} |
539 |
|
540 |
static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense) |
541 |
{ |
542 |
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
543 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
544 |
|
545 |
if (((vdev->guest_features >> VIRTIO_SCSI_F_CHANGE) & 1) && |
546 |
dev->type != TYPE_ROM) { |
547 |
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE, |
548 |
sense.asc | (sense.ascq << 8));
|
549 |
} |
550 |
} |
551 |
|
552 |
static void virtio_scsi_hotplug(SCSIBus *bus, SCSIDevice *dev) |
553 |
{ |
554 |
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
555 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
556 |
|
557 |
if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
558 |
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
559 |
VIRTIO_SCSI_EVT_RESET_RESCAN); |
560 |
} |
561 |
} |
562 |
|
563 |
static void virtio_scsi_hot_unplug(SCSIBus *bus, SCSIDevice *dev) |
564 |
{ |
565 |
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
566 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
567 |
|
568 |
if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
569 |
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
570 |
VIRTIO_SCSI_EVT_RESET_REMOVED); |
571 |
} |
572 |
} |
573 |
|
574 |
static struct SCSIBusInfo virtio_scsi_scsi_info = { |
575 |
.tcq = true,
|
576 |
.max_channel = VIRTIO_SCSI_MAX_CHANNEL, |
577 |
.max_target = VIRTIO_SCSI_MAX_TARGET, |
578 |
.max_lun = VIRTIO_SCSI_MAX_LUN, |
579 |
|
580 |
.complete = virtio_scsi_command_complete, |
581 |
.cancel = virtio_scsi_request_cancelled, |
582 |
.change = virtio_scsi_change, |
583 |
.hotplug = virtio_scsi_hotplug, |
584 |
.hot_unplug = virtio_scsi_hot_unplug, |
585 |
.get_sg_list = virtio_scsi_get_sg_list, |
586 |
.save_request = virtio_scsi_save_request, |
587 |
.load_request = virtio_scsi_load_request, |
588 |
}; |
589 |
|
590 |
int virtio_scsi_common_init(VirtIOSCSICommon *s)
|
591 |
{ |
592 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
593 |
int i;
|
594 |
|
595 |
virtio_init(VIRTIO_DEVICE(s), "virtio-scsi", VIRTIO_ID_SCSI,
|
596 |
sizeof(VirtIOSCSIConfig));
|
597 |
|
598 |
s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *));
|
599 |
s->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
600 |
s->cdb_size = VIRTIO_SCSI_CDB_SIZE; |
601 |
|
602 |
s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
603 |
virtio_scsi_handle_ctrl); |
604 |
s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
605 |
virtio_scsi_handle_event); |
606 |
for (i = 0; i < s->conf.num_queues; i++) { |
607 |
s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
608 |
virtio_scsi_handle_cmd); |
609 |
} |
610 |
|
611 |
return 0; |
612 |
} |
613 |
|
614 |
static int virtio_scsi_device_init(VirtIODevice *vdev) |
615 |
{ |
616 |
DeviceState *qdev = DEVICE(vdev); |
617 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
618 |
VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
619 |
static int virtio_scsi_id; |
620 |
int ret;
|
621 |
|
622 |
ret = virtio_scsi_common_init(vs); |
623 |
if (ret < 0) { |
624 |
return ret;
|
625 |
} |
626 |
|
627 |
scsi_bus_new(&s->bus, qdev, &virtio_scsi_scsi_info, vdev->bus_name); |
628 |
|
629 |
if (!qdev->hotplugged) {
|
630 |
scsi_bus_legacy_handle_cmdline(&s->bus); |
631 |
} |
632 |
|
633 |
register_savevm(qdev, "virtio-scsi", virtio_scsi_id++, 1, |
634 |
virtio_scsi_save, virtio_scsi_load, s); |
635 |
|
636 |
return 0; |
637 |
} |
638 |
|
639 |
int virtio_scsi_common_exit(VirtIOSCSICommon *vs)
|
640 |
{ |
641 |
VirtIODevice *vdev = VIRTIO_DEVICE(vs); |
642 |
|
643 |
g_free(vs->cmd_vqs); |
644 |
virtio_cleanup(vdev); |
645 |
return 0; |
646 |
} |
647 |
|
648 |
static int virtio_scsi_device_exit(DeviceState *qdev) |
649 |
{ |
650 |
VirtIOSCSI *s = VIRTIO_SCSI(qdev); |
651 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(qdev); |
652 |
|
653 |
unregister_savevm(qdev, "virtio-scsi", s);
|
654 |
return virtio_scsi_common_exit(vs);
|
655 |
} |
656 |
|
657 |
static Property virtio_scsi_properties[] = {
|
658 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, parent_obj.conf), |
659 |
DEFINE_PROP_END_OF_LIST(), |
660 |
}; |
661 |
|
662 |
static void virtio_scsi_common_class_init(ObjectClass *klass, void *data) |
663 |
{ |
664 |
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
665 |
|
666 |
vdc->get_config = virtio_scsi_get_config; |
667 |
} |
668 |
|
669 |
static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
670 |
{ |
671 |
DeviceClass *dc = DEVICE_CLASS(klass); |
672 |
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
673 |
dc->exit = virtio_scsi_device_exit; |
674 |
dc->props = virtio_scsi_properties; |
675 |
vdc->init = virtio_scsi_device_init; |
676 |
vdc->set_config = virtio_scsi_set_config; |
677 |
vdc->get_features = virtio_scsi_get_features; |
678 |
vdc->reset = virtio_scsi_reset; |
679 |
} |
680 |
|
681 |
static const TypeInfo virtio_scsi_common_info = { |
682 |
.name = TYPE_VIRTIO_SCSI_COMMON, |
683 |
.parent = TYPE_VIRTIO_DEVICE, |
684 |
.instance_size = sizeof(VirtIOSCSICommon),
|
685 |
.class_init = virtio_scsi_common_class_init, |
686 |
}; |
687 |
|
688 |
static const TypeInfo virtio_scsi_info = { |
689 |
.name = TYPE_VIRTIO_SCSI, |
690 |
.parent = TYPE_VIRTIO_SCSI_COMMON, |
691 |
.instance_size = sizeof(VirtIOSCSI),
|
692 |
.class_init = virtio_scsi_class_init, |
693 |
}; |
694 |
|
695 |
static void virtio_register_types(void) |
696 |
{ |
697 |
type_register_static(&virtio_scsi_common_info); |
698 |
type_register_static(&virtio_scsi_info); |
699 |
} |
700 |
|
701 |
type_init(virtio_register_types) |