2011-02-11 09:40:59 +01:00
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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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2013-02-05 17:06:20 +01:00
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#include "hw/virtio/virtio-scsi.h"
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2013-02-04 11:37:52 +01:00
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#include "qemu/error-report.h"
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2013-02-05 17:06:20 +01:00
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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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2011-02-11 09:40:59 +01:00
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2011-02-13 11:55:52 +01:00
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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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2011-11-14 16:58:41 +01:00
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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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}
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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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2011-02-13 11:55:52 +01:00
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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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2013-03-21 15:15:18 +01:00
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VirtIODevice *vdev = VIRTIO_DEVICE(s);
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2011-02-13 11:55:52 +01:00
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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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2013-03-21 15:15:18 +01:00
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virtio_notify(vdev, vq);
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2011-02-13 11:55:52 +01:00
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}
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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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}
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2013-06-03 14:17:19 +02:00
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static void qemu_sgl_init_external(VirtIOSCSIReq *req, struct iovec *sg,
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2012-10-23 12:30:10 +02:00
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hwaddr *addr, int num)
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2011-02-13 11:55:52 +01:00
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{
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2013-06-03 14:17:19 +02:00
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QEMUSGList *qsgl = &req->qsgl;
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qemu_sglist_init(qsgl, DEVICE(req->dev), num, &address_space_memory);
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2011-02-13 11:55:52 +01:00
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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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}
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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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2012-06-20 08:47:11 +02:00
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assert(req->elem.in_num);
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2011-02-13 11:55:52 +01:00
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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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2012-06-20 08:47:11 +02:00
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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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2011-02-13 11:55:52 +01:00
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req->resp.buf = req->elem.in_sg[0].iov_base;
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if (req->elem.out_num > 1) {
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2013-06-03 14:17:19 +02:00
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qemu_sgl_init_external(req, &req->elem.out_sg[1],
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2011-02-13 11:55:52 +01:00
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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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2013-06-03 14:17:19 +02:00
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qemu_sgl_init_external(req, &req->elem.in_sg[1],
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2011-02-13 11:55:52 +01:00
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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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2011-12-02 15:23:15 +01:00
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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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2013-03-29 02:08:15 +01:00
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev);
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2012-04-06 10:39:46 +02:00
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uint32_t n = virtio_queue_get_id(req->vq) - 2;
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2011-12-02 15:23:15 +01:00
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2013-03-29 02:08:15 +01:00
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assert(n < vs->conf.num_queues);
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2012-04-06 10:20:43 +02:00
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qemu_put_be32s(f, &n);
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2011-12-02 15:23:15 +01:00
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qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem));
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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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2013-03-29 02:08:15 +01:00
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
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2011-12-02 15:23:15 +01:00
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VirtIOSCSIReq *req;
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2012-04-06 10:20:43 +02:00
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uint32_t n;
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2011-12-02 15:23:15 +01:00
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req = g_malloc(sizeof(*req));
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2012-04-06 10:20:43 +02:00
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qemu_get_be32s(f, &n);
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2013-03-29 02:08:15 +01:00
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assert(n < vs->conf.num_queues);
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2011-12-02 15:23:15 +01:00
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qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem));
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2013-03-29 02:08:15 +01:00
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virtio_scsi_parse_req(s, vs->cmd_vqs[n], req);
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2011-12-02 15:23:15 +01:00
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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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2011-11-14 17:44:09 +01:00
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static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
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2011-02-13 11:55:52 +01:00
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{
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2011-11-14 17:44:09 +01:00
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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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2011-12-23 22:34:39 +01:00
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BusChild *kid;
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2011-11-14 17:44:09 +01:00
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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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2012-08-08 16:26:16 +02:00
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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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2011-11-14 17:44:09 +01:00
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break;
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}
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}
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2012-08-08 16:26:16 +02:00
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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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2011-11-14 17:44:09 +01:00
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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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2011-12-23 22:34:39 +01:00
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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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2011-11-14 17:44:09 +01:00
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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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2011-02-13 11:55:52 +01:00
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}
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2011-11-14 17:44:09 +01:00
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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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2011-02-13 11:55:52 +01:00
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}
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|
2011-02-11 09:40:59 +01:00
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static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
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{
|
2011-02-13 11:55:52 +01:00
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VirtIOSCSI *s = (VirtIOSCSI *)vdev;
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VirtIOSCSIReq *req;
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while ((req = virtio_scsi_pop_req(s, vq))) {
|
2011-11-14 17:44:09 +01:00
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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();
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continue;
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}
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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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}
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virtio_scsi_do_tmf(s, req);
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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) {
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if (out_size < sizeof(VirtIOSCSICtrlANReq) ||
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in_size < sizeof(VirtIOSCSICtrlANResp)) {
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virtio_scsi_bad_req();
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}
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req->resp.an->event_actual = 0;
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req->resp.an->response = VIRTIO_SCSI_S_OK;
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}
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virtio_scsi_complete_req(req);
|
2011-02-13 11:55:52 +01:00
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}
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}
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|
2011-11-14 16:58:41 +01:00
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|
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static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status,
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|
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size_t resid)
|
|
|
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{
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VirtIOSCSIReq *req = r->hba_private;
|
2012-11-23 06:08:44 +01:00
|
|
|
uint32_t sense_len;
|
2011-11-14 16:58:41 +01:00
|
|
|
|
|
|
|
req->resp.cmd->response = VIRTIO_SCSI_S_OK;
|
|
|
|
req->resp.cmd->status = status;
|
|
|
|
if (req->resp.cmd->status == GOOD) {
|
2012-11-23 06:08:44 +01:00
|
|
|
req->resp.cmd->resid = tswap32(resid);
|
2011-11-14 16:58:41 +01:00
|
|
|
} else {
|
|
|
|
req->resp.cmd->resid = 0;
|
2012-11-23 06:08:44 +01:00
|
|
|
sense_len = scsi_req_get_sense(r, req->resp.cmd->sense,
|
|
|
|
VIRTIO_SCSI_SENSE_SIZE);
|
|
|
|
req->resp.cmd->sense_len = tswap32(sense_len);
|
2011-11-14 16:58:41 +01:00
|
|
|
}
|
|
|
|
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;
|
|
|
|
}
|
2011-11-14 17:44:09 +01:00
|
|
|
if (req->dev->resetting) {
|
|
|
|
req->resp.cmd->response = VIRTIO_SCSI_S_RESET;
|
|
|
|
} else {
|
|
|
|
req->resp.cmd->response = VIRTIO_SCSI_S_ABORTED;
|
|
|
|
}
|
2011-11-14 16:58:41 +01:00
|
|
|
virtio_scsi_complete_req(req);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req)
|
2011-02-13 11:55:52 +01:00
|
|
|
{
|
|
|
|
req->resp.cmd->response = VIRTIO_SCSI_S_FAILURE;
|
|
|
|
virtio_scsi_complete_req(req);
|
2011-02-11 09:40:59 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq)
|
|
|
|
{
|
2013-03-29 02:08:15 +01:00
|
|
|
/* use non-QOM casts in the data path */
|
2011-02-13 11:55:52 +01:00
|
|
|
VirtIOSCSI *s = (VirtIOSCSI *)vdev;
|
2013-03-29 02:08:15 +01:00
|
|
|
VirtIOSCSICommon *vs = &s->parent_obj;
|
|
|
|
|
2011-02-13 11:55:52 +01:00
|
|
|
VirtIOSCSIReq *req;
|
2011-11-14 16:58:41 +01:00
|
|
|
int n;
|
2011-02-13 11:55:52 +01:00
|
|
|
|
|
|
|
while ((req = virtio_scsi_pop_req(s, vq))) {
|
2011-11-14 16:58:41 +01:00
|
|
|
SCSIDevice *d;
|
2011-02-13 11:55:52 +01:00
|
|
|
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;
|
2013-03-29 02:08:15 +01:00
|
|
|
if (out_size < sizeof(VirtIOSCSICmdReq) + vs->cdb_size ||
|
|
|
|
in_size < sizeof(VirtIOSCSICmdResp) + vs->sense_size) {
|
2011-02-13 11:55:52 +01:00
|
|
|
virtio_scsi_bad_req();
|
|
|
|
}
|
|
|
|
|
|
|
|
if (req->elem.out_num > 1 && req->elem.in_num > 1) {
|
2011-11-14 16:58:41 +01:00
|
|
|
virtio_scsi_fail_cmd_req(req);
|
2011-02-13 11:55:52 +01:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2011-11-14 16:58:41 +01:00
|
|
|
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);
|
|
|
|
}
|
2011-02-13 11:55:52 +01:00
|
|
|
}
|
2011-02-11 09:40:59 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static void virtio_scsi_get_config(VirtIODevice *vdev,
|
|
|
|
uint8_t *config)
|
|
|
|
{
|
|
|
|
VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
|
2013-03-29 02:08:15 +01:00
|
|
|
VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev);
|
2011-02-11 09:40:59 +01:00
|
|
|
|
2013-03-21 15:15:11 +01:00
|
|
|
stl_raw(&scsiconf->num_queues, s->conf.num_queues);
|
2011-02-11 09:40:59 +01:00
|
|
|
stl_raw(&scsiconf->seg_max, 128 - 2);
|
2013-03-21 15:15:11 +01:00
|
|
|
stl_raw(&scsiconf->max_sectors, s->conf.max_sectors);
|
|
|
|
stl_raw(&scsiconf->cmd_per_lun, s->conf.cmd_per_lun);
|
2011-02-11 09:40:59 +01:00
|
|
|
stl_raw(&scsiconf->event_info_size, sizeof(VirtIOSCSIEvent));
|
|
|
|
stl_raw(&scsiconf->sense_size, s->sense_size);
|
|
|
|
stl_raw(&scsiconf->cdb_size, s->cdb_size);
|
virtio-scsi: Fix subtle (guest) endian bug
The virtio-scsi config space is, by specification, in guest endian (which
is ill-defined, but there you go). In virtio_scsi_get_config() we set up
all the fields in there, using stl_raw(). Which is a problem for the
max_channel and max_target fields, which are 16-bit, not 32-bit. For
little-endian targets we get away with it by accident, since the first
two bytes will still be correct, and the extra two bytes written (with
zeroes) will be overwritten correctly by the next store.
But for big-endian guests, this means the max_target field ends up as zero,
which means the guest will only recognize a single disk on the virtio-scsi
bus. This patch fixes the problem.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul 'Rusty' Russell <rusty@rustcorp.com.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-26 02:33:52 +01:00
|
|
|
stw_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL);
|
|
|
|
stw_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET);
|
2011-02-11 09:40:59 +01:00
|
|
|
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;
|
2013-03-29 02:08:15 +01:00
|
|
|
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
|
2011-02-11 09:40:59 +01:00
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2013-03-29 02:08:15 +01:00
|
|
|
vs->sense_size = ldl_raw(&scsiconf->sense_size);
|
|
|
|
vs->cdb_size = ldl_raw(&scsiconf->cdb_size);
|
2011-02-11 09:40:59 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t virtio_scsi_get_features(VirtIODevice *vdev,
|
|
|
|
uint32_t requested_features)
|
|
|
|
{
|
|
|
|
return requested_features;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void virtio_scsi_reset(VirtIODevice *vdev)
|
|
|
|
{
|
2013-03-29 02:08:15 +01:00
|
|
|
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
|
|
|
|
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
|
2011-02-11 09:40:59 +01:00
|
|
|
|
2013-01-10 15:49:08 +01:00
|
|
|
s->resetting++;
|
|
|
|
qbus_reset_all(&s->bus.qbus);
|
|
|
|
s->resetting--;
|
|
|
|
|
2013-03-29 02:08:15 +01:00
|
|
|
vs->sense_size = VIRTIO_SCSI_SENSE_SIZE;
|
|
|
|
vs->cdb_size = VIRTIO_SCSI_CDB_SIZE;
|
2012-07-16 14:50:27 +02:00
|
|
|
s->events_dropped = false;
|
2011-02-11 09:40:59 +01:00
|
|
|
}
|
|
|
|
|
2011-12-02 15:23:15 +01:00
|
|
|
/* 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)
|
|
|
|
{
|
2013-03-21 15:15:18 +01:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
|
|
|
|
virtio_save(vdev, f);
|
2011-12-02 15:23:15 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id)
|
|
|
|
{
|
2013-03-21 15:15:18 +01:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
|
2012-05-16 12:21:35 +02:00
|
|
|
int ret;
|
|
|
|
|
2013-03-21 15:15:18 +01:00
|
|
|
ret = virtio_load(vdev, f);
|
2012-05-16 12:21:35 +02:00
|
|
|
if (ret) {
|
|
|
|
return ret;
|
|
|
|
}
|
2011-12-02 15:23:15 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-06-20 08:47:11 +02:00
|
|
|
static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
|
|
|
|
uint32_t event, uint32_t reason)
|
|
|
|
{
|
2013-03-29 02:08:15 +01:00
|
|
|
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
|
|
|
|
VirtIOSCSIReq *req = virtio_scsi_pop_req(s, vs->event_vq);
|
2012-06-20 08:47:11 +02:00
|
|
|
VirtIOSCSIEvent *evt;
|
2013-03-21 15:15:18 +01:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(s);
|
2012-07-02 10:47:35 +02:00
|
|
|
int in_size;
|
2012-06-20 08:47:11 +02:00
|
|
|
|
2013-03-21 15:15:18 +01:00
|
|
|
if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
|
2012-10-08 16:50:51 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-07-02 10:47:35 +02:00
|
|
|
if (!req) {
|
|
|
|
s->events_dropped = true;
|
|
|
|
return;
|
|
|
|
}
|
2012-06-20 08:47:11 +02:00
|
|
|
|
2012-07-02 10:47:35 +02:00
|
|
|
if (req->elem.out_num || req->elem.in_num != 1) {
|
|
|
|
virtio_scsi_bad_req();
|
|
|
|
}
|
2012-06-20 08:47:11 +02:00
|
|
|
|
2012-07-02 10:47:35 +02:00
|
|
|
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 {
|
2012-06-20 08:47:11 +02:00
|
|
|
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;
|
2012-07-02 10:47:35 +02:00
|
|
|
}
|
|
|
|
virtio_scsi_complete_req(req);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq)
|
|
|
|
{
|
2013-03-21 15:15:18 +01:00
|
|
|
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
|
2012-07-02 10:47:35 +02:00
|
|
|
|
|
|
|
if (s->events_dropped) {
|
|
|
|
virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0);
|
2012-06-20 08:47:11 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-07-16 14:22:52 +02:00
|
|
|
static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense)
|
|
|
|
{
|
|
|
|
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus);
|
2013-03-21 15:15:18 +01:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(s);
|
2012-07-16 14:22:52 +02:00
|
|
|
|
2013-03-21 15:15:18 +01:00
|
|
|
if (((vdev->guest_features >> VIRTIO_SCSI_F_CHANGE) & 1) &&
|
2012-07-16 14:22:52 +02:00
|
|
|
dev->type != TYPE_ROM) {
|
|
|
|
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE,
|
|
|
|
sense.asc | (sense.ascq << 8));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-06-20 08:47:11 +02:00
|
|
|
static void virtio_scsi_hotplug(SCSIBus *bus, SCSIDevice *dev)
|
|
|
|
{
|
|
|
|
VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus);
|
2013-03-21 15:15:18 +01:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(s);
|
2012-06-20 08:47:11 +02:00
|
|
|
|
2013-03-21 15:15:18 +01:00
|
|
|
if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) {
|
2012-06-20 08:47:11 +02:00
|
|
|
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);
|
2013-03-21 15:15:18 +01:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(s);
|
2012-06-20 08:47:11 +02:00
|
|
|
|
2013-03-21 15:15:18 +01:00
|
|
|
if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) {
|
2012-06-20 08:47:11 +02:00
|
|
|
virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET,
|
|
|
|
VIRTIO_SCSI_EVT_RESET_REMOVED);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-11-14 16:58:41 +01:00
|
|
|
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,
|
2012-07-16 14:22:52 +02:00
|
|
|
.change = virtio_scsi_change,
|
2012-06-20 08:47:11 +02:00
|
|
|
.hotplug = virtio_scsi_hotplug,
|
|
|
|
.hot_unplug = virtio_scsi_hot_unplug,
|
2011-11-14 16:58:41 +01:00
|
|
|
.get_sg_list = virtio_scsi_get_sg_list,
|
2011-12-02 15:23:15 +01:00
|
|
|
.save_request = virtio_scsi_save_request,
|
|
|
|
.load_request = virtio_scsi_load_request,
|
2011-11-14 16:58:41 +01:00
|
|
|
};
|
|
|
|
|
2013-07-30 03:19:55 +02:00
|
|
|
void virtio_scsi_common_realize(DeviceState *dev, Error **errp)
|
2011-02-11 09:40:59 +01:00
|
|
|
{
|
2013-07-30 03:19:55 +02:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
|
|
|
|
VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev);
|
2012-04-06 10:39:46 +02:00
|
|
|
int i;
|
2011-02-11 09:40:59 +01:00
|
|
|
|
2013-07-30 05:41:42 +02:00
|
|
|
virtio_init(vdev, "virtio-scsi", VIRTIO_ID_SCSI,
|
2013-03-21 15:15:19 +01:00
|
|
|
sizeof(VirtIOSCSIConfig));
|
2013-03-21 15:15:14 +01:00
|
|
|
|
2013-03-21 15:15:19 +01:00
|
|
|
s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *));
|
2013-03-29 02:08:15 +01:00
|
|
|
s->sense_size = VIRTIO_SCSI_SENSE_SIZE;
|
|
|
|
s->cdb_size = VIRTIO_SCSI_CDB_SIZE;
|
2013-03-21 15:15:14 +01:00
|
|
|
|
2013-03-21 15:15:18 +01:00
|
|
|
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,
|
2012-06-12 18:37:25 +02:00
|
|
|
virtio_scsi_handle_event);
|
2013-03-21 15:15:11 +01:00
|
|
|
for (i = 0; i < s->conf.num_queues; i++) {
|
2013-03-21 15:15:18 +01:00
|
|
|
s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE,
|
2012-04-06 10:39:46 +02:00
|
|
|
virtio_scsi_handle_cmd);
|
|
|
|
}
|
2013-03-29 02:08:15 +01:00
|
|
|
}
|
|
|
|
|
2013-07-30 03:19:55 +02:00
|
|
|
static void virtio_scsi_device_realize(DeviceState *dev, Error **errp)
|
2013-03-29 02:08:15 +01:00
|
|
|
{
|
2013-07-30 03:19:55 +02:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
|
2013-07-30 05:41:42 +02:00
|
|
|
VirtIOSCSI *s = VIRTIO_SCSI(dev);
|
2013-03-29 02:08:15 +01:00
|
|
|
static int virtio_scsi_id;
|
2013-07-21 12:16:34 +02:00
|
|
|
Error *err = NULL;
|
2013-03-29 02:08:15 +01:00
|
|
|
|
2013-07-30 03:19:55 +02:00
|
|
|
virtio_scsi_common_realize(dev, &err);
|
|
|
|
if (err != NULL) {
|
|
|
|
error_propagate(errp, err);
|
|
|
|
return;
|
2013-03-29 02:08:15 +01:00
|
|
|
}
|
|
|
|
|
2013-07-30 05:41:42 +02:00
|
|
|
scsi_bus_new(&s->bus, sizeof(s->bus), dev,
|
2013-08-23 20:30:03 +02:00
|
|
|
&virtio_scsi_scsi_info, vdev->bus_name);
|
2013-04-30 16:08:51 +02:00
|
|
|
|
2013-07-30 05:41:42 +02:00
|
|
|
if (!dev->hotplugged) {
|
2013-07-21 12:16:34 +02:00
|
|
|
scsi_bus_legacy_handle_cmdline(&s->bus, &err);
|
|
|
|
if (err != NULL) {
|
2013-07-30 03:19:55 +02:00
|
|
|
error_propagate(errp, err);
|
|
|
|
return;
|
2013-07-21 12:16:34 +02:00
|
|
|
}
|
2011-11-14 16:58:41 +01:00
|
|
|
}
|
|
|
|
|
2013-07-30 05:41:42 +02:00
|
|
|
register_savevm(dev, "virtio-scsi", virtio_scsi_id++, 1,
|
2011-12-02 15:23:15 +01:00
|
|
|
virtio_scsi_save, virtio_scsi_load, s);
|
2013-03-21 15:15:14 +01:00
|
|
|
}
|
|
|
|
|
2013-09-20 14:06:08 +02:00
|
|
|
void virtio_scsi_common_exit(VirtIOSCSICommon *vs)
|
2013-03-29 02:08:15 +01:00
|
|
|
{
|
2013-07-30 03:19:55 +02:00
|
|
|
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
|
|
|
|
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
|
2013-03-29 02:08:15 +01:00
|
|
|
|
|
|
|
g_free(vs->cmd_vqs);
|
2013-04-24 10:21:22 +02:00
|
|
|
virtio_cleanup(vdev);
|
2013-03-29 02:08:15 +01:00
|
|
|
}
|
|
|
|
|
2013-09-20 14:06:08 +02:00
|
|
|
static void virtio_scsi_device_exit(VirtIODevice *vdev)
|
2013-03-21 15:15:14 +01:00
|
|
|
{
|
2013-09-20 14:06:08 +02:00
|
|
|
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
|
|
|
|
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
|
2013-03-21 15:15:14 +01:00
|
|
|
|
2013-09-20 14:06:08 +02:00
|
|
|
unregister_savevm(DEVICE(vdev), "virtio-scsi", s);
|
|
|
|
virtio_scsi_common_exit(vs);
|
2013-03-21 15:15:14 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static Property virtio_scsi_properties[] = {
|
2013-03-29 02:08:15 +01:00
|
|
|
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, parent_obj.conf),
|
2013-03-21 15:15:14 +01:00
|
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
|
|
};
|
|
|
|
|
2013-03-29 02:08:15 +01:00
|
|
|
static void virtio_scsi_common_class_init(ObjectClass *klass, void *data)
|
|
|
|
{
|
|
|
|
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
|
2013-07-29 16:17:45 +02:00
|
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
2013-03-29 02:08:15 +01:00
|
|
|
|
|
|
|
vdc->get_config = virtio_scsi_get_config;
|
2013-07-29 16:17:45 +02:00
|
|
|
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
|
2013-03-29 02:08:15 +01:00
|
|
|
}
|
|
|
|
|
2013-03-21 15:15:14 +01:00
|
|
|
static void virtio_scsi_class_init(ObjectClass *klass, void *data)
|
|
|
|
{
|
|
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
|
2013-07-30 03:19:55 +02:00
|
|
|
|
2013-03-21 15:15:14 +01:00
|
|
|
dc->props = virtio_scsi_properties;
|
2013-07-29 16:17:45 +02:00
|
|
|
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
|
2013-07-30 03:19:55 +02:00
|
|
|
vdc->realize = virtio_scsi_device_realize;
|
2013-09-20 14:06:08 +02:00
|
|
|
vdc->exit = virtio_scsi_device_exit;
|
2013-03-21 15:15:14 +01:00
|
|
|
vdc->set_config = virtio_scsi_set_config;
|
|
|
|
vdc->get_features = virtio_scsi_get_features;
|
|
|
|
vdc->reset = virtio_scsi_reset;
|
|
|
|
}
|
|
|
|
|
2013-03-29 02:08:15 +01:00
|
|
|
static const TypeInfo virtio_scsi_common_info = {
|
|
|
|
.name = TYPE_VIRTIO_SCSI_COMMON,
|
|
|
|
.parent = TYPE_VIRTIO_DEVICE,
|
|
|
|
.instance_size = sizeof(VirtIOSCSICommon),
|
2013-08-19 17:53:15 +02:00
|
|
|
.abstract = true,
|
2013-03-29 02:08:15 +01:00
|
|
|
.class_init = virtio_scsi_common_class_init,
|
|
|
|
};
|
|
|
|
|
2013-03-21 15:15:14 +01:00
|
|
|
static const TypeInfo virtio_scsi_info = {
|
|
|
|
.name = TYPE_VIRTIO_SCSI,
|
2013-03-29 02:08:15 +01:00
|
|
|
.parent = TYPE_VIRTIO_SCSI_COMMON,
|
2013-03-21 15:15:14 +01:00
|
|
|
.instance_size = sizeof(VirtIOSCSI),
|
|
|
|
.class_init = virtio_scsi_class_init,
|
|
|
|
};
|
|
|
|
|
|
|
|
static void virtio_register_types(void)
|
|
|
|
{
|
2013-03-29 02:08:15 +01:00
|
|
|
type_register_static(&virtio_scsi_common_info);
|
2013-03-21 15:15:14 +01:00
|
|
|
type_register_static(&virtio_scsi_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
type_init(virtio_register_types)
|