109 static void vring_init(VRing *vr, VqInfo *info)  in vring_init()  argument
114     vr->id = info->index;  in vring_init()
115     vr->num = info->num;  in vring_init()
116     vr->desc = p;  in vring_init()
117     vr->avail = p + info->num * sizeof(VRingDesc);  in vring_init()
118     vr->used = (void *)(((unsigned long)&vr->avail->ring[info->num]  in vring_init()
122     vr->avail->flags = 0;  in vring_init()
123     vr->avail->idx = 0;  in vring_init()
126     vr->used->flags = VRING_USED_F_NO_NOTIFY;  in vring_init()
127     vr->used->idx = 0;  in vring_init()
128     vr->used_idx = 0;  in vring_init()
129     vr->next_idx = 0;  in vring_init()
130     vr->cookie = 0;  in vring_init()
132     debug_print_addr("init vr", vr);  in vring_init()
135 bool vring_notify(VRing *vr)  in vring_notify()  argument
137     vr->cookie = virtio_notify(vr->schid, vr->id, vr->cookie);  in vring_notify()
138     return vr->cookie >= 0;  in vring_notify()
141 void vring_send_buf(VRing *vr, void *p, int len, int flags)  in vring_send_buf()  argument
145         vr->avail->ring[vr->avail->idx % vr->num] = vr->next_idx;  in vring_send_buf()
148     vr->desc[vr->next_idx].addr = (unsigned long)p;  in vring_send_buf()
149     vr->desc[vr->next_idx].len = len;  in vring_send_buf()
150     vr->desc[vr->next_idx].flags = flags & ~VRING_HIDDEN_IS_CHAIN;  in vring_send_buf()
151     vr->desc[vr->next_idx].next = vr->next_idx;  in vring_send_buf()
152     vr->desc[vr->next_idx].next++;  in vring_send_buf()
153     vr->next_idx++;  in vring_send_buf()
157         vr->avail->idx++;  in vring_send_buf()
161 int vr_poll(VRing *vr)  in vr_poll()  argument
163     if (vr->used->idx == vr->used_idx) {  in vr_poll()
164         vring_notify(vr);  in vr_poll()
169     vr->used_idx = vr->used->idx;  in vr_poll()
170     vr->next_idx = 0;  in vr_poll()
171     vr->desc[0].len = 0;  in vr_poll()
172     vr->desc[0].flags = 0;  in vr_poll()
205     VRing *vr = &vdev->vrings[vqid];  in virtio_run()  local
209         vring_send_buf(vr, cmd[i].data, cmd[i].size,  in virtio_run()
214     if (drain_irqs(vr->schid)) {  in virtio_run()