root / hw / scsi / virtio-scsi.c @ f487b677
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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; |
| 25 |
VirtQueueElement elem; |
| 26 |
QEMUSGList qsgl; |
| 27 |
SCSIRequest *sreq; |
| 28 |
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; |
| 41 |
} VirtIOSCSIReq; |
| 42 |
|
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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 |
|
| 48 |
static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun) |
| 49 |
{
|
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if (lun[0] != 1) { |
| 51 |
return NULL; |
| 52 |
} |
| 53 |
if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) { |
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return NULL; |
| 55 |
} |
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return scsi_device_find(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun)); |
| 57 |
} |
| 58 |
|
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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); |
| 66 |
if (req->sreq) {
|
| 67 |
req->sreq->hba_private = NULL;
|
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scsi_req_unref(req->sreq); |
| 69 |
} |
| 70 |
g_free(req); |
| 71 |
virtio_notify(vdev, vq); |
| 72 |
} |
| 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(VirtIOSCSIReq *req, struct iovec *sg, |
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hwaddr *addr, int num)
|
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{
|
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QEMUSGList *qsgl = &req->qsgl; |
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|
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qemu_sglist_init(qsgl, DEVICE(req->dev), num, &address_space_memory); |
| 86 |
while (num--) {
|
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qemu_sglist_add(qsgl, *(addr++), (sg++)->iov_len); |
| 88 |
} |
| 89 |
} |
| 90 |
|
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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, &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, &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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|
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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; |
| 121 |
} |
| 122 |
|
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virtio_scsi_parse_req(s, vq, req); |
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return req;
|
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} |
| 126 |
|
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static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) |
| 128 |
{
|
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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)); |
| 136 |
} |
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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; |
| 145 |
|
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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); |
| 151 |
|
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scsi_req_ref(sreq); |
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req->sreq = sreq; |
| 154 |
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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|
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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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|
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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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|
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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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|
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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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} |
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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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|
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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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|
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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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|
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return;
|
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|
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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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|
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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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|
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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; |
| 273 |
|
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while ((req = virtio_scsi_pop_req(s, vq))) {
|
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int out_size, in_size;
|
| 276 |
if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
| 277 |
virtio_scsi_bad_req(); |
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continue;
|
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} |
| 280 |
|
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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(); |
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} |
| 288 |
virtio_scsi_do_tmf(s, req); |
| 289 |
|
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} else if (req->req.tmf->type == VIRTIO_SCSI_T_AN_QUERY || |
| 291 |
req->req.tmf->type == VIRTIO_SCSI_T_AN_SUBSCRIBE) {
|
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if (out_size < sizeof(VirtIOSCSICtrlANReq) || |
| 293 |
in_size < sizeof(VirtIOSCSICtrlANResp)) {
|
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virtio_scsi_bad_req(); |
| 295 |
} |
| 296 |
req->resp.an->event_actual = 0;
|
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req->resp.an->response = VIRTIO_SCSI_S_OK; |
| 298 |
} |
| 299 |
virtio_scsi_complete_req(req); |
| 300 |
} |
| 301 |
} |
| 302 |
|
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static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, |
| 304 |
size_t resid) |
| 305 |
{
|
| 306 |
VirtIOSCSIReq *req = r->hba_private; |
| 307 |
uint32_t sense_len; |
| 308 |
|
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req->resp.cmd->response = VIRTIO_SCSI_S_OK; |
| 310 |
req->resp.cmd->status = status; |
| 311 |
if (req->resp.cmd->status == GOOD) {
|
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req->resp.cmd->resid = tswap32(resid); |
| 313 |
} else {
|
| 314 |
req->resp.cmd->resid = 0;
|
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sense_len = scsi_req_get_sense(r, req->resp.cmd->sense, |
| 316 |
VIRTIO_SCSI_SENSE_SIZE); |
| 317 |
req->resp.cmd->sense_len = tswap32(sense_len); |
| 318 |
} |
| 319 |
virtio_scsi_complete_req(req); |
| 320 |
} |
| 321 |
|
| 322 |
static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r)
|
| 323 |
{
|
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VirtIOSCSIReq *req = r->hba_private; |
| 325 |
|
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return &req->qsgl;
|
| 327 |
} |
| 328 |
|
| 329 |
static void virtio_scsi_request_cancelled(SCSIRequest *r) |
| 330 |
{
|
| 331 |
VirtIOSCSIReq *req = r->hba_private; |
| 332 |
|
| 333 |
if (!req) {
|
| 334 |
return;
|
| 335 |
} |
| 336 |
if (req->dev->resetting) {
|
| 337 |
req->resp.cmd->response = VIRTIO_SCSI_S_RESET; |
| 338 |
} else {
|
| 339 |
req->resp.cmd->response = VIRTIO_SCSI_S_ABORTED; |
| 340 |
} |
| 341 |
virtio_scsi_complete_req(req); |
| 342 |
} |
| 343 |
|
| 344 |
static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) |
| 345 |
{
|
| 346 |
req->resp.cmd->response = VIRTIO_SCSI_S_FAILURE; |
| 347 |
virtio_scsi_complete_req(req); |
| 348 |
} |
| 349 |
|
| 350 |
static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) |
| 351 |
{
|
| 352 |
/* use non-QOM casts in the data path */
|
| 353 |
VirtIOSCSI *s = (VirtIOSCSI *)vdev; |
| 354 |
VirtIOSCSICommon *vs = &s->parent_obj; |
| 355 |
|
| 356 |
VirtIOSCSIReq *req; |
| 357 |
int n;
|
| 358 |
|
| 359 |
while ((req = virtio_scsi_pop_req(s, vq))) {
|
| 360 |
SCSIDevice *d; |
| 361 |
int out_size, in_size;
|
| 362 |
if (req->elem.out_num < 1 || req->elem.in_num < 1) { |
| 363 |
virtio_scsi_bad_req(); |
| 364 |
} |
| 365 |
|
| 366 |
out_size = req->elem.out_sg[0].iov_len;
|
| 367 |
in_size = req->elem.in_sg[0].iov_len;
|
| 368 |
if (out_size < sizeof(VirtIOSCSICmdReq) + vs->cdb_size || |
| 369 |
in_size < sizeof(VirtIOSCSICmdResp) + vs->sense_size) {
|
| 370 |
virtio_scsi_bad_req(); |
| 371 |
} |
| 372 |
|
| 373 |
if (req->elem.out_num > 1 && req->elem.in_num > 1) { |
| 374 |
virtio_scsi_fail_cmd_req(req); |
| 375 |
continue;
|
| 376 |
} |
| 377 |
|
| 378 |
d = virtio_scsi_device_find(s, req->req.cmd->lun); |
| 379 |
if (!d) {
|
| 380 |
req->resp.cmd->response = VIRTIO_SCSI_S_BAD_TARGET; |
| 381 |
virtio_scsi_complete_req(req); |
| 382 |
continue;
|
| 383 |
} |
| 384 |
req->sreq = scsi_req_new(d, req->req.cmd->tag, |
| 385 |
virtio_scsi_get_lun(req->req.cmd->lun), |
| 386 |
req->req.cmd->cdb, req); |
| 387 |
|
| 388 |
if (req->sreq->cmd.mode != SCSI_XFER_NONE) {
|
| 389 |
int req_mode =
|
| 390 |
(req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV);
|
| 391 |
|
| 392 |
if (req->sreq->cmd.mode != req_mode ||
|
| 393 |
req->sreq->cmd.xfer > req->qsgl.size) {
|
| 394 |
req->resp.cmd->response = VIRTIO_SCSI_S_OVERRUN; |
| 395 |
virtio_scsi_complete_req(req); |
| 396 |
continue;
|
| 397 |
} |
| 398 |
} |
| 399 |
|
| 400 |
n = scsi_req_enqueue(req->sreq); |
| 401 |
if (n) {
|
| 402 |
scsi_req_continue(req->sreq); |
| 403 |
} |
| 404 |
} |
| 405 |
} |
| 406 |
|
| 407 |
static void virtio_scsi_get_config(VirtIODevice *vdev, |
| 408 |
uint8_t *config) |
| 409 |
{
|
| 410 |
VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; |
| 411 |
VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev); |
| 412 |
|
| 413 |
stl_raw(&scsiconf->num_queues, s->conf.num_queues); |
| 414 |
stl_raw(&scsiconf->seg_max, 128 - 2); |
| 415 |
stl_raw(&scsiconf->max_sectors, s->conf.max_sectors); |
| 416 |
stl_raw(&scsiconf->cmd_per_lun, s->conf.cmd_per_lun); |
| 417 |
stl_raw(&scsiconf->event_info_size, sizeof(VirtIOSCSIEvent));
|
| 418 |
stl_raw(&scsiconf->sense_size, s->sense_size); |
| 419 |
stl_raw(&scsiconf->cdb_size, s->cdb_size); |
| 420 |
stw_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); |
| 421 |
stw_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); |
| 422 |
stl_raw(&scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); |
| 423 |
} |
| 424 |
|
| 425 |
static void virtio_scsi_set_config(VirtIODevice *vdev, |
| 426 |
const uint8_t *config)
|
| 427 |
{
|
| 428 |
VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; |
| 429 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
| 430 |
|
| 431 |
if ((uint32_t) ldl_raw(&scsiconf->sense_size) >= 65536 || |
| 432 |
(uint32_t) ldl_raw(&scsiconf->cdb_size) >= 256) {
|
| 433 |
error_report("bad data written to virtio-scsi configuration space");
|
| 434 |
exit(1);
|
| 435 |
} |
| 436 |
|
| 437 |
vs->sense_size = ldl_raw(&scsiconf->sense_size); |
| 438 |
vs->cdb_size = ldl_raw(&scsiconf->cdb_size); |
| 439 |
} |
| 440 |
|
| 441 |
static uint32_t virtio_scsi_get_features(VirtIODevice *vdev,
|
| 442 |
uint32_t requested_features) |
| 443 |
{
|
| 444 |
return requested_features;
|
| 445 |
} |
| 446 |
|
| 447 |
static void virtio_scsi_reset(VirtIODevice *vdev) |
| 448 |
{
|
| 449 |
VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
| 450 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
| 451 |
|
| 452 |
s->resetting++; |
| 453 |
qbus_reset_all(&s->bus.qbus); |
| 454 |
s->resetting--; |
| 455 |
|
| 456 |
vs->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
| 457 |
vs->cdb_size = VIRTIO_SCSI_CDB_SIZE; |
| 458 |
s->events_dropped = false;
|
| 459 |
} |
| 460 |
|
| 461 |
/* The device does not have anything to save beyond the virtio data.
|
| 462 |
* Request data is saved with callbacks from SCSI devices.
|
| 463 |
*/
|
| 464 |
static void virtio_scsi_save(QEMUFile *f, void *opaque) |
| 465 |
{
|
| 466 |
VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
| 467 |
virtio_save(vdev, f); |
| 468 |
} |
| 469 |
|
| 470 |
static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id) |
| 471 |
{
|
| 472 |
VirtIODevice *vdev = VIRTIO_DEVICE(opaque); |
| 473 |
int ret;
|
| 474 |
|
| 475 |
ret = virtio_load(vdev, f); |
| 476 |
if (ret) {
|
| 477 |
return ret;
|
| 478 |
} |
| 479 |
return 0; |
| 480 |
} |
| 481 |
|
| 482 |
static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, |
| 483 |
uint32_t event, uint32_t reason) |
| 484 |
{
|
| 485 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); |
| 486 |
VirtIOSCSIReq *req = virtio_scsi_pop_req(s, vs->event_vq); |
| 487 |
VirtIOSCSIEvent *evt; |
| 488 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 489 |
int in_size;
|
| 490 |
|
| 491 |
if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
| 492 |
return;
|
| 493 |
} |
| 494 |
|
| 495 |
if (!req) {
|
| 496 |
s->events_dropped = true;
|
| 497 |
return;
|
| 498 |
} |
| 499 |
|
| 500 |
if (req->elem.out_num || req->elem.in_num != 1) { |
| 501 |
virtio_scsi_bad_req(); |
| 502 |
} |
| 503 |
|
| 504 |
if (s->events_dropped) {
|
| 505 |
event |= VIRTIO_SCSI_T_EVENTS_MISSED; |
| 506 |
s->events_dropped = false;
|
| 507 |
} |
| 508 |
|
| 509 |
in_size = req->elem.in_sg[0].iov_len;
|
| 510 |
if (in_size < sizeof(VirtIOSCSIEvent)) { |
| 511 |
virtio_scsi_bad_req(); |
| 512 |
} |
| 513 |
|
| 514 |
evt = req->resp.event; |
| 515 |
memset(evt, 0, sizeof(VirtIOSCSIEvent)); |
| 516 |
evt->event = event; |
| 517 |
evt->reason = reason; |
| 518 |
if (!dev) {
|
| 519 |
assert(event == VIRTIO_SCSI_T_NO_EVENT); |
| 520 |
} else {
|
| 521 |
evt->lun[0] = 1; |
| 522 |
evt->lun[1] = dev->id;
|
| 523 |
|
| 524 |
/* Linux wants us to keep the same encoding we use for REPORT LUNS. */
|
| 525 |
if (dev->lun >= 256) { |
| 526 |
evt->lun[2] = (dev->lun >> 8) | 0x40; |
| 527 |
} |
| 528 |
evt->lun[3] = dev->lun & 0xFF; |
| 529 |
} |
| 530 |
virtio_scsi_complete_req(req); |
| 531 |
} |
| 532 |
|
| 533 |
static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) |
| 534 |
{
|
| 535 |
VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
| 536 |
|
| 537 |
if (s->events_dropped) {
|
| 538 |
virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); |
| 539 |
} |
| 540 |
} |
| 541 |
|
| 542 |
static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense) |
| 543 |
{
|
| 544 |
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
| 545 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 546 |
|
| 547 |
if (((vdev->guest_features >> VIRTIO_SCSI_F_CHANGE) & 1) && |
| 548 |
dev->type != TYPE_ROM) {
|
| 549 |
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE, |
| 550 |
sense.asc | (sense.ascq << 8));
|
| 551 |
} |
| 552 |
} |
| 553 |
|
| 554 |
static void virtio_scsi_hotplug(SCSIBus *bus, SCSIDevice *dev) |
| 555 |
{
|
| 556 |
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
| 557 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 558 |
|
| 559 |
if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
| 560 |
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
| 561 |
VIRTIO_SCSI_EVT_RESET_RESCAN); |
| 562 |
} |
| 563 |
} |
| 564 |
|
| 565 |
static void virtio_scsi_hot_unplug(SCSIBus *bus, SCSIDevice *dev) |
| 566 |
{
|
| 567 |
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); |
| 568 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 569 |
|
| 570 |
if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { |
| 571 |
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, |
| 572 |
VIRTIO_SCSI_EVT_RESET_REMOVED); |
| 573 |
} |
| 574 |
} |
| 575 |
|
| 576 |
static struct SCSIBusInfo virtio_scsi_scsi_info = { |
| 577 |
.tcq = true,
|
| 578 |
.max_channel = VIRTIO_SCSI_MAX_CHANNEL, |
| 579 |
.max_target = VIRTIO_SCSI_MAX_TARGET, |
| 580 |
.max_lun = VIRTIO_SCSI_MAX_LUN, |
| 581 |
|
| 582 |
.complete = virtio_scsi_command_complete, |
| 583 |
.cancel = virtio_scsi_request_cancelled, |
| 584 |
.change = virtio_scsi_change, |
| 585 |
.hotplug = virtio_scsi_hotplug, |
| 586 |
.hot_unplug = virtio_scsi_hot_unplug, |
| 587 |
.get_sg_list = virtio_scsi_get_sg_list, |
| 588 |
.save_request = virtio_scsi_save_request, |
| 589 |
.load_request = virtio_scsi_load_request, |
| 590 |
}; |
| 591 |
|
| 592 |
int virtio_scsi_common_init(VirtIOSCSICommon *s)
|
| 593 |
{
|
| 594 |
VirtIODevice *vdev = VIRTIO_DEVICE(s); |
| 595 |
int i;
|
| 596 |
|
| 597 |
virtio_init(VIRTIO_DEVICE(s), "virtio-scsi", VIRTIO_ID_SCSI,
|
| 598 |
sizeof(VirtIOSCSIConfig));
|
| 599 |
|
| 600 |
s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *));
|
| 601 |
s->sense_size = VIRTIO_SCSI_SENSE_SIZE; |
| 602 |
s->cdb_size = VIRTIO_SCSI_CDB_SIZE; |
| 603 |
|
| 604 |
s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
| 605 |
virtio_scsi_handle_ctrl); |
| 606 |
s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
| 607 |
virtio_scsi_handle_event); |
| 608 |
for (i = 0; i < s->conf.num_queues; i++) { |
| 609 |
s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, |
| 610 |
virtio_scsi_handle_cmd); |
| 611 |
} |
| 612 |
|
| 613 |
return 0; |
| 614 |
} |
| 615 |
|
| 616 |
static int virtio_scsi_device_init(VirtIODevice *vdev) |
| 617 |
{
|
| 618 |
DeviceState *qdev = DEVICE(vdev); |
| 619 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); |
| 620 |
VirtIOSCSI *s = VIRTIO_SCSI(vdev); |
| 621 |
static int virtio_scsi_id; |
| 622 |
int ret;
|
| 623 |
|
| 624 |
ret = virtio_scsi_common_init(vs); |
| 625 |
if (ret < 0) { |
| 626 |
return ret;
|
| 627 |
} |
| 628 |
|
| 629 |
scsi_bus_new(&s->bus, qdev, &virtio_scsi_scsi_info, vdev->bus_name); |
| 630 |
|
| 631 |
if (!qdev->hotplugged) {
|
| 632 |
scsi_bus_legacy_handle_cmdline(&s->bus); |
| 633 |
} |
| 634 |
|
| 635 |
register_savevm(qdev, "virtio-scsi", virtio_scsi_id++, 1, |
| 636 |
virtio_scsi_save, virtio_scsi_load, s); |
| 637 |
|
| 638 |
return 0; |
| 639 |
} |
| 640 |
|
| 641 |
int virtio_scsi_common_exit(VirtIOSCSICommon *vs)
|
| 642 |
{
|
| 643 |
VirtIODevice *vdev = VIRTIO_DEVICE(vs); |
| 644 |
|
| 645 |
g_free(vs->cmd_vqs); |
| 646 |
virtio_cleanup(vdev); |
| 647 |
return 0; |
| 648 |
} |
| 649 |
|
| 650 |
static int virtio_scsi_device_exit(DeviceState *qdev) |
| 651 |
{
|
| 652 |
VirtIOSCSI *s = VIRTIO_SCSI(qdev); |
| 653 |
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(qdev); |
| 654 |
|
| 655 |
unregister_savevm(qdev, "virtio-scsi", s);
|
| 656 |
return virtio_scsi_common_exit(vs);
|
| 657 |
} |
| 658 |
|
| 659 |
static Property virtio_scsi_properties[] = {
|
| 660 |
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, parent_obj.conf), |
| 661 |
DEFINE_PROP_END_OF_LIST(), |
| 662 |
}; |
| 663 |
|
| 664 |
static void virtio_scsi_common_class_init(ObjectClass *klass, void *data) |
| 665 |
{
|
| 666 |
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
| 667 |
|
| 668 |
vdc->get_config = virtio_scsi_get_config; |
| 669 |
} |
| 670 |
|
| 671 |
static void virtio_scsi_class_init(ObjectClass *klass, void *data) |
| 672 |
{
|
| 673 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 674 |
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
| 675 |
dc->exit = virtio_scsi_device_exit; |
| 676 |
dc->props = virtio_scsi_properties; |
| 677 |
vdc->init = virtio_scsi_device_init; |
| 678 |
vdc->set_config = virtio_scsi_set_config; |
| 679 |
vdc->get_features = virtio_scsi_get_features; |
| 680 |
vdc->reset = virtio_scsi_reset; |
| 681 |
} |
| 682 |
|
| 683 |
static const TypeInfo virtio_scsi_common_info = { |
| 684 |
.name = TYPE_VIRTIO_SCSI_COMMON, |
| 685 |
.parent = TYPE_VIRTIO_DEVICE, |
| 686 |
.instance_size = sizeof(VirtIOSCSICommon),
|
| 687 |
.class_init = virtio_scsi_common_class_init, |
| 688 |
}; |
| 689 |
|
| 690 |
static const TypeInfo virtio_scsi_info = { |
| 691 |
.name = TYPE_VIRTIO_SCSI, |
| 692 |
.parent = TYPE_VIRTIO_SCSI_COMMON, |
| 693 |
.instance_size = sizeof(VirtIOSCSI),
|
| 694 |
.class_init = virtio_scsi_class_init, |
| 695 |
}; |
| 696 |
|
| 697 |
static void virtio_register_types(void) |
| 698 |
{
|
| 699 |
type_register_static(&virtio_scsi_common_info); |
| 700 |
type_register_static(&virtio_scsi_info); |
| 701 |
} |
| 702 |
|
| 703 |
type_init(virtio_register_types) |