uint16_t i;
int vid = dev->vid;
struct vhost_queue *queue;
+ int ret;
RTE_LOG(INFO, VHOST_CONFIG,
"setting builtin vhost-user net driver\n");
else
dev->hdr_len = sizeof(struct virtio_net_hdr);
- rte_vhost_get_mem_table(vid, &dev->mem);
+ ret = rte_vhost_get_mem_table(vid, &dev->mem);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG, "Failed to get "
+ "VM memory layout for device(%d)\n", vid);
+ return;
+ }
dev->nr_vrings = rte_vhost_get_vring_num(vid);
for (i = 0; i < dev->nr_vrings; i++) {
struct rte_mbuf *m, uint16_t desc_idx)
{
uint32_t desc_avail, desc_offset;
+ uint64_t desc_chunck_len;
uint32_t mbuf_avail, mbuf_offset;
uint32_t cpy_len;
struct vring_desc *desc;
- uint64_t desc_addr;
+ uint64_t desc_addr, desc_gaddr;
struct virtio_net_hdr virtio_hdr = {0, 0, 0, 0, 0, 0};
/* A counter to avoid desc dead loop chain */
uint16_t nr_desc = 1;
desc = &vr->desc[desc_idx];
- desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr);
+ desc_chunck_len = desc->len;
+ desc_gaddr = desc->addr;
+ desc_addr = rte_vhost_va_from_guest_pa(
+ dev->mem, desc_gaddr, &desc_chunck_len);
/*
* Checking of 'desc_addr' placed outside of 'unlikely' macro to avoid
* performance issue with some versions of gcc (4.8.4 and 5.3.0) which
rte_prefetch0((void *)(uintptr_t)desc_addr);
/* write virtio-net header */
- *(struct virtio_net_hdr *)(uintptr_t)desc_addr = virtio_hdr;
+ if (likely(desc_chunck_len >= dev->hdr_len)) {
+ *(struct virtio_net_hdr *)(uintptr_t)desc_addr = virtio_hdr;
+ desc_offset = dev->hdr_len;
+ } else {
+ uint64_t len;
+ uint64_t remain = dev->hdr_len;
+ uint64_t src = (uint64_t)(uintptr_t)&virtio_hdr, dst;
+ uint64_t guest_addr = desc_gaddr;
+
+ while (remain) {
+ len = remain;
+ dst = rte_vhost_va_from_guest_pa(dev->mem,
+ guest_addr, &len);
+ if (unlikely(!dst || !len))
+ return -1;
+
+ rte_memcpy((void *)(uintptr_t)dst,
+ (void *)(uintptr_t)src,
+ len);
+
+ remain -= len;
+ guest_addr += len;
+ src += len;
+ }
+
+ desc_chunck_len = desc->len - dev->hdr_len;
+ desc_gaddr += dev->hdr_len;
+ desc_addr = rte_vhost_va_from_guest_pa(
+ dev->mem, desc_gaddr,
+ &desc_chunck_len);
+ if (unlikely(!desc_addr))
+ return -1;
+
+ desc_offset = 0;
+ }
- desc_offset = dev->hdr_len;
desc_avail = desc->len - dev->hdr_len;
mbuf_avail = rte_pktmbuf_data_len(m);
return -1;
desc = &vr->desc[desc->next];
- desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr);
+ desc_chunck_len = desc->len;
+ desc_gaddr = desc->addr;
+ desc_addr = rte_vhost_va_from_guest_pa(
+ dev->mem, desc_gaddr, &desc_chunck_len);
if (unlikely(!desc_addr))
return -1;
desc_offset = 0;
desc_avail = desc->len;
+ } else if (unlikely(desc_chunck_len == 0)) {
+ desc_chunck_len = desc_avail;
+ desc_gaddr += desc_offset;
+ desc_addr = rte_vhost_va_from_guest_pa(dev->mem,
+ desc_gaddr,
+ &desc_chunck_len);
+ if (unlikely(!desc_addr))
+ return -1;
+
+ desc_offset = 0;
}
- cpy_len = RTE_MIN(desc_avail, mbuf_avail);
+ cpy_len = RTE_MIN(desc_chunck_len, mbuf_avail);
rte_memcpy((void *)((uintptr_t)(desc_addr + desc_offset)),
rte_pktmbuf_mtod_offset(m, void *, mbuf_offset),
cpy_len);
mbuf_offset += cpy_len;
desc_avail -= cpy_len;
desc_offset += cpy_len;
+ desc_chunck_len -= cpy_len;
}
return 0;
queue = &dev->queues[queue_id];
vr = &queue->vr;
- avail_idx = *((volatile uint16_t *)&vr->avail->idx);
+ avail_idx = __atomic_load_n(&vr->avail->idx, __ATOMIC_ACQUIRE);
start_idx = queue->last_used_idx;
free_entries = avail_idx - start_idx;
count = RTE_MIN(count, free_entries);
rte_prefetch0(&vr->desc[desc_indexes[i+1]]);
}
- rte_smp_wmb();
-
- *(volatile uint16_t *)&vr->used->idx += count;
+ __atomic_add_fetch(&vr->used->idx, count, __ATOMIC_RELEASE);
queue->last_used_idx += count;
rte_vhost_vring_call(dev->vid, queue_id);
struct rte_mempool *mbuf_pool)
{
struct vring_desc *desc;
- uint64_t desc_addr;
+ uint64_t desc_addr, desc_gaddr;
uint32_t desc_avail, desc_offset;
+ uint64_t desc_chunck_len;
uint32_t mbuf_avail, mbuf_offset;
uint32_t cpy_len;
struct rte_mbuf *cur = m, *prev = m;
(desc->flags & VRING_DESC_F_INDIRECT))
return -1;
- desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr);
+ desc_chunck_len = desc->len;
+ desc_gaddr = desc->addr;
+ desc_addr = rte_vhost_va_from_guest_pa(
+ dev->mem, desc_gaddr, &desc_chunck_len);
if (unlikely(!desc_addr))
return -1;
* header.
*/
desc = &vr->desc[desc->next];
- desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr);
+ desc_chunck_len = desc->len;
+ desc_gaddr = desc->addr;
+ desc_addr = rte_vhost_va_from_guest_pa(
+ dev->mem, desc_gaddr, &desc_chunck_len);
if (unlikely(!desc_addr))
return -1;
rte_prefetch0((void *)(uintptr_t)desc_addr);
mbuf_offset = 0;
mbuf_avail = m->buf_len - RTE_PKTMBUF_HEADROOM;
while (1) {
- cpy_len = RTE_MIN(desc_avail, mbuf_avail);
+ cpy_len = RTE_MIN(desc_chunck_len, mbuf_avail);
rte_memcpy(rte_pktmbuf_mtod_offset(cur, void *,
mbuf_offset),
(void *)((uintptr_t)(desc_addr + desc_offset)),
mbuf_offset += cpy_len;
desc_avail -= cpy_len;
desc_offset += cpy_len;
+ desc_chunck_len -= cpy_len;
/* This desc reaches to its end, get the next one */
if (desc_avail == 0) {
return -1;
desc = &vr->desc[desc->next];
- desc_addr = rte_vhost_gpa_to_vva(dev->mem, desc->addr);
+ desc_chunck_len = desc->len;
+ desc_gaddr = desc->addr;
+ desc_addr = rte_vhost_va_from_guest_pa(
+ dev->mem, desc_gaddr, &desc_chunck_len);
if (unlikely(!desc_addr))
return -1;
rte_prefetch0((void *)(uintptr_t)desc_addr);
desc_offset = 0;
desc_avail = desc->len;
+ } else if (unlikely(desc_chunck_len == 0)) {
+ desc_chunck_len = desc_avail;
+ desc_gaddr += desc_offset;
+ desc_addr = rte_vhost_va_from_guest_pa(dev->mem,
+ desc_gaddr,
+ &desc_chunck_len);
+ if (unlikely(!desc_addr))
+ return -1;
+
+ desc_offset = 0;
}
/*
queue = &dev->queues[queue_id];
vr = &queue->vr;
- free_entries = *((volatile uint16_t *)&vr->avail->idx) -
+ free_entries = __atomic_load_n(&vr->avail->idx, __ATOMIC_ACQUIRE) -
queue->last_avail_idx;
if (free_entries == 0)
return 0;
queue->last_avail_idx += i;
queue->last_used_idx += i;
- rte_smp_wmb();
- rte_smp_rmb();
- vr->used->idx += i;
+ __atomic_add_fetch(&vr->used->idx, i, __ATOMIC_ACQ_REL);
rte_vhost_vring_call(dev->vid, queue_id);