Lines Matching refs:vq
150 struct vhost_virtqueue *vq)
152 vq->num = 1;
153 vq->desc = NULL;
154 vq->avail = NULL;
155 vq->used = NULL;
156 vq->last_avail_idx = 0;
157 vq->avail_idx = 0;
158 vq->last_used_idx = 0;
159 vq->used_flags = 0;
160 vq->used_flags = 0;
161 vq->log_used = false;
162 vq->log_addr = -1ull;
163 vq->vhost_hlen = 0;
164 vq->sock_hlen = 0;
165 vq->private_data = NULL;
166 vq->log_base = NULL;
167 vq->error_ctx = NULL;
168 vq->error = NULL;
169 vq->kick = NULL;
170 vq->call_ctx = NULL;
171 vq->call = NULL;
172 vq->log_ctx = NULL;
380 /* Caller should have vq mutex and device mutex. */
406 /* Caller should have device mutex but not vq mutex */
440 /* Caller should have device mutex but not vq mutex */
447 /* Caller should have vq mutex and device mutex */
448 static int vq_log_access_ok(struct vhost_virtqueue *vq, void __user *log_base)
450 return vq_memory_access_ok(log_base, vq->dev->memory,
451 vhost_has_feature(vq->dev, VHOST_F_LOG_ALL)) &&
452 (!vq->log_used || log_access_ok(log_base, vq->log_addr,
453 sizeof *vq->used +
454 vq->num * sizeof *vq->used->ring));
457 /* Can we start vq? */
458 /* Caller should have vq mutex and device mutex */
459 int vhost_vq_access_ok(struct vhost_virtqueue *vq)
461 return vq_access_ok(vq->num, vq->desc, vq->avail, vq->used) &&
462 vq_log_access_ok(vq, vq->log_base);
497 static int init_used(struct vhost_virtqueue *vq,
500 int r = put_user(vq->used_flags, &used->flags);
503 return get_user(vq->last_used_idx, &used->idx);
512 struct vhost_virtqueue *vq;
525 vq = d->vqs + idx;
527 mutex_lock(&vq->mutex);
533 if (vq->private_data) {
545 vq->num = s.num;
550 if (vq->private_data) {
562 vq->last_avail_idx = s.num;
564 vq->avail_idx = vq->last_avail_idx;
568 s.num = vq->last_avail_idx;
589 if ((a.avail_user_addr & (sizeof *vq->avail->ring - 1)) ||
590 (a.used_user_addr & (sizeof *vq->used->ring - 1)) ||
591 (a.log_guest_addr & (sizeof *vq->used->ring - 1))) {
599 if (vq->private_data) {
600 if (!vq_access_ok(vq->num,
610 !log_access_ok(vq->log_base, a.log_guest_addr,
611 sizeof *vq->used +
612 vq->num * sizeof *vq->used->ring)) {
618 r = init_used(vq, (struct vring_used __user *)(unsigned long)
622 vq->log_used = !!(a.flags & (0x1 << VHOST_VRING_F_LOG));
623 vq->desc = (void __user *)(unsigned long)a.desc_user_addr;
624 vq->avail = (void __user *)(unsigned long)a.avail_user_addr;
625 vq->log_addr = a.log_guest_addr;
626 vq->used = (void __user *)(unsigned long)a.used_user_addr;
638 if (eventfp != vq->kick) {
639 pollstop = filep = vq->kick;
640 pollstart = vq->kick = eventfp;
654 if (eventfp != vq->call) {
655 filep = vq->call;
656 ctx = vq->call_ctx;
657 vq->call = eventfp;
658 vq->call_ctx = eventfp ?
673 if (eventfp != vq->error) {
674 filep = vq->error;
675 vq->error = eventfp;
676 ctx = vq->error_ctx;
677 vq->error_ctx = eventfp ?
686 if (pollstop && vq->handle_kick)
687 vhost_poll_stop(&vq->poll);
694 if (pollstart && vq->handle_kick)
695 vhost_poll_start(&vq->poll, vq->kick);
697 mutex_unlock(&vq->mutex);
699 if (pollstop && vq->handle_kick)
700 vhost_poll_flush(&vq->poll);
739 struct vhost_virtqueue *vq;
741 vq = d->vqs + i;
742 mutex_lock(&vq->mutex);
744 if (vq->private_data && !vq_log_access_ok(vq, base))
747 vq->log_base = base;
748 mutex_unlock(&vq->mutex);
848 int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log,
857 r = log_write(vq->log_base, log[i].addr, l);
862 if (vq->log_ctx)
863 eventfd_signal(vq->log_ctx, 1);
930 static int get_indirect(struct vhost_dev *dev, struct vhost_virtqueue *vq,
942 vq_err(vq, "Invalid length in indirect descriptor: "
949 ret = translate_desc(dev, indirect->addr, indirect->len, vq->indirect,
950 ARRAY_SIZE(vq->indirect));
952 vq_err(vq, "Translation failure %d in indirect.\n", ret);
964 vq_err(vq, "Indirect buffer length too big: %d\n",
972 vq_err(vq, "Loop detected: last one at %u "
977 if (unlikely(memcpy_fromiovec((unsigned char *)&desc, vq->indirect,
979 vq_err(vq, "Failed indirect descriptor: idx %d, %zx\n",
984 vq_err(vq, "Nested indirect descriptor: idx %d, %zx\n",
992 vq_err(vq, "Translation failure %d indirect idx %d\n",
1008 vq_err(vq, "Indirect descriptor "
1023 * This function returns the descriptor number found, or vq->num (which is
1026 int vhost_get_vq_desc(struct vhost_dev *dev, struct vhost_virtqueue *vq,
1037 last_avail_idx = vq->last_avail_idx;
1038 if (unlikely(get_user(vq->avail_idx, &vq->avail->idx))) {
1039 vq_err(vq, "Failed to access avail idx at %p\n",
1040 &vq->avail->idx);
1044 if (unlikely((u16)(vq->avail_idx - last_avail_idx) > vq->num)) {
1045 vq_err(vq, "Guest moved used index from %u to %u",
1046 last_avail_idx, vq->avail_idx);
1051 if (vq->avail_idx == last_avail_idx)
1052 return vq->num;
1060 &vq->avail->ring[last_avail_idx % vq->num]))) {
1061 vq_err(vq, "Failed to read head: idx %d address %p\n",
1063 &vq->avail->ring[last_avail_idx % vq->num]);
1068 if (unlikely(head >= vq->num)) {
1069 vq_err(vq, "Guest says index %u > %u is available",
1070 head, vq->num);
1082 if (unlikely(i >= vq->num)) {
1083 vq_err(vq, "Desc index is %u > %u, head = %u",
1084 i, vq->num, head);
1087 if (unlikely(++found > vq->num)) {
1088 vq_err(vq, "Loop detected: last one at %u "
1089 "vq size %u head %u\n",
1090 i, vq->num, head);
1093 ret = copy_from_user(&desc, vq->desc + i, sizeof desc);
1095 vq_err(vq, "Failed to get descriptor: idx %d addr %p\n",
1096 i, vq->desc + i);
1100 ret = get_indirect(dev, vq, iov, iov_size,
1104 vq_err(vq, "Failure detected "
1114 vq_err(vq, "Translation failure %d descriptor idx %d\n",
1131 vq_err(vq, "Descriptor has out after in: "
1140 vq->last_avail_idx++;
1145 void vhost_discard_vq_desc(struct vhost_virtqueue *vq, int n)
1147 vq->last_avail_idx -= n;
1152 int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len)
1158 used = &vq->used->ring[vq->last_used_idx % vq->num];
1160 vq_err(vq, "Failed to write used id");
1164 vq_err(vq, "Failed to write used len");
1169 if (put_user(vq->last_used_idx + 1, &vq->used->idx)) {
1170 vq_err(vq, "Failed to increment used idx");
1173 if (unlikely(vq->log_used)) {
1177 log_write(vq->log_base,
1178 vq->log_addr +
1179 ((void __user *)used - (void __user *)vq->used),
1182 log_write(vq->log_base,
1183 vq->log_addr + offsetof(struct vring_used, idx),
1184 sizeof vq->used->idx);
1185 if (vq->log_ctx)
1186 eventfd_signal(vq->log_ctx, 1);
1188 vq->last_used_idx++;
1192 static int __vhost_add_used_n(struct vhost_virtqueue *vq,
1199 start = vq->last_used_idx % vq->num;
1200 used = vq->used->ring + start;
1202 vq_err(vq, "Failed to write used");
1205 if (unlikely(vq->log_used)) {
1209 log_write(vq->log_base,
1210 vq->log_addr +
1211 ((void __user *)used - (void __user *)vq->used),
1214 vq->last_used_idx += count;
1220 int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads,
1225 start = vq->last_used_idx % vq->num;
1226 n = vq->num - start;
1228 r = __vhost_add_used_n(vq, heads, n);
1234 r = __vhost_add_used_n(vq, heads, count);
1238 if (put_user(vq->last_used_idx, &vq->used->idx)) {
1239 vq_err(vq, "Failed to increment used idx");
1242 if (unlikely(vq->log_used)) {
1244 log_write(vq->log_base,
1245 vq->log_addr + offsetof(struct vring_used, idx),
1246 sizeof vq->used->idx);
1247 if (vq->log_ctx)
1248 eventfd_signal(vq->log_ctx, 1);
1254 void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq)
1262 if (get_user(flags, &vq->avail->flags)) {
1263 vq_err(vq, "Failed to get flags");
1269 (vq->avail_idx != vq->last_avail_idx ||
1274 if (vq->call_ctx)
1275 eventfd_signal(vq->call_ctx, 1);
1280 struct vhost_virtqueue *vq,
1283 vhost_add_used(vq, head, len);
1284 vhost_signal(dev, vq);
1289 struct vhost_virtqueue *vq,
1292 vhost_add_used_n(vq, heads, count);
1293 vhost_signal(dev, vq);
1297 bool vhost_enable_notify(struct vhost_virtqueue *vq)
1301 if (!(vq->used_flags & VRING_USED_F_NO_NOTIFY))
1303 vq->used_flags &= ~VRING_USED_F_NO_NOTIFY;
1304 r = put_user(vq->used_flags, &vq->used->flags);
1306 vq_err(vq, "Failed to enable notification at %p: %d\n",
1307 &vq->used->flags, r);
1313 r = get_user(avail_idx, &vq->avail->idx);
1315 vq_err(vq, "Failed to check avail idx at %p: %d\n",
1316 &vq->avail->idx, r);
1320 return avail_idx != vq->avail_idx;
1324 void vhost_disable_notify(struct vhost_virtqueue *vq)
1327 if (vq->used_flags & VRING_USED_F_NO_NOTIFY)
1329 vq->used_flags |= VRING_USED_F_NO_NOTIFY;
1330 r = put_user(vq->used_flags, &vq->used->flags);
1332 vq_err(vq, "Failed to enable notification at %p: %d\n",
1333 &vq->used->flags, r);