rdma_rxq_t * rxq)
{
u32 n_alloc, n;
- struct ibv_sge sg_entry;
- struct ibv_recv_wr wr, *bad_wr;
- u32 buffers[VLIB_FRAME_SIZE];
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ struct ibv_recv_wr wr[VLIB_FRAME_SIZE], *w = wr;
+ struct ibv_sge sge[VLIB_FRAME_SIZE], *s = sge;
+ u32 slot = rxq->tail & (rxq->size - 1);
- if (rxq->n_enq >= rxq->size)
+ /* do not enqueue more packet than ring space */
+ n_alloc = clib_min (VLIB_FRAME_SIZE, rxq->size - (rxq->tail - rxq->head));
+
+ /* do not bother to allocate if too small */
+ if (n_alloc < 16)
+ return;
+
+ /* avoid wrap-around logic in core loop */
+ n_alloc = clib_min (n_alloc, rxq->size - slot);
+
+ n = n_alloc =
+ vlib_buffer_alloc_to_ring_from_pool (vm, rxq->bufs, slot, rxq->size,
+ n_alloc, rd->pool);
+
+ /* if ring is full or allocation error, do nothing */
+ if (PREDICT_FALSE (0 == n_alloc))
+ return;
+
+ vlib_get_buffers (vm, &rxq->bufs[slot], bufs, n_alloc);
+
+ while (n >= 4)
+ {
+ if (PREDICT_TRUE (n >= 8))
+ {
+ CLIB_PREFETCH (&s[4 + 0], 4 * sizeof (s[0]), STORE);
+ CLIB_PREFETCH (&w[4 + 0], 4 * sizeof (w[0]), STORE);
+ }
+
+ s[0].addr = vlib_buffer_get_va (b[0]);
+ s[0].length = vlib_buffer_get_default_data_size (vm);
+ s[0].lkey = rd->lkey;
+
+ s[1].addr = vlib_buffer_get_va (b[1]);
+ s[1].length = vlib_buffer_get_default_data_size (vm);
+ s[1].lkey = rd->lkey;
+
+ s[2].addr = vlib_buffer_get_va (b[2]);
+ s[2].length = vlib_buffer_get_default_data_size (vm);
+ s[2].lkey = rd->lkey;
+
+ s[3].addr = vlib_buffer_get_va (b[3]);
+ s[3].length = vlib_buffer_get_default_data_size (vm);
+ s[3].lkey = rd->lkey;
+
+ w[0].next = &w[0] + 1;
+ w[0].sg_list = &s[0];
+ w[0].num_sge = 1;
+
+ w[1].next = &w[1] + 1;
+ w[1].sg_list = &s[1];
+ w[1].num_sge = 1;
+
+ w[2].next = &w[2] + 1;
+ w[2].sg_list = &s[2];
+ w[2].num_sge = 1;
+
+ w[3].next = &w[3] + 1;
+ w[3].sg_list = &s[3];
+ w[3].num_sge = 1;
+
+ s += 4;
+ w += 4;
+ b += 4;
+ n -= 4;
+ }
+
+ while (n >= 1)
+ {
+ s[0].addr = vlib_buffer_get_va (b[0]);
+ s[0].length = vlib_buffer_get_default_data_size (vm);
+ s[0].lkey = rd->lkey;
+
+ w[0].next = &w[0] + 1;
+ w[0].sg_list = &s[0];
+ w[0].num_sge = 1;
+
+ s += 1;
+ w += 1;
+ b += 1;
+ n -= 1;
+ }
+
+ w[-1].next = 0; /* fix next pointer in WR linked-list last item */
+
+ n = n_alloc;
+ if (ibv_post_wq_recv (rxq->wq, wr, &w) != 0)
+ {
+ n = w - wr;
+ vlib_buffer_free_from_ring (vm, rxq->bufs, slot + n, rxq->size,
+ n_alloc - n);
+ }
+
+ rxq->tail += n;
+}
+
+static_always_inline void
+rdma_device_input_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
+ const rdma_device_t * rd, u32 n_left, const u32 * bi,
+ u32 next_index)
+{
+ u32 n_trace, i;
+
+ if (PREDICT_TRUE (0 == (n_trace = vlib_get_trace_count (vm, node))))
+ return;
+
+ i = 0;
+ while (n_trace && n_left)
+ {
+ vlib_buffer_t *b;
+ rdma_input_trace_t *tr;
+ b = vlib_get_buffer (vm, bi[0]);
+ vlib_trace_buffer (vm, node, next_index, b,
+ /* follow_chain */ 0);
+ tr = vlib_add_trace (vm, node, b, sizeof (*tr));
+ tr->next_index = next_index;
+ tr->hw_if_index = rd->hw_if_index;
+
+ /* next */
+ n_trace--;
+ n_left--;
+ bi++;
+ i++;
+ }
+ vlib_set_trace_count (vm, node, n_trace);
+}
+
+static_always_inline void
+rdma_device_input_ethernet (vlib_main_t * vm, vlib_node_runtime_t * node,
+ const rdma_device_t * rd, u32 next_index)
+{
+ vlib_next_frame_t *nf;
+ vlib_frame_t *f;
+ ethernet_input_frame_t *ef;
+
+ if (PREDICT_FALSE (VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT != next_index))
return;
- n_alloc = clib_min (VLIB_FRAME_SIZE, rxq->size - rxq->n_enq);
- n_alloc = vlib_buffer_alloc (vm, buffers, n_alloc);
+ nf =
+ vlib_node_runtime_get_next_frame (vm, node,
+ VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT);
+ f = vlib_get_frame (vm, nf->frame);
+ f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
+ /* FIXME: f->flags |= ETH_INPUT_FRAME_F_IP4_CKSUM_OK; */
+
+ ef = vlib_frame_scalar_args (f);
+ ef->sw_if_index = rd->sw_if_index;
+ ef->hw_if_index = rd->hw_if_index;
+}
+
+static_always_inline u32
+rdma_device_input_bufs (vlib_main_t * vm, const rdma_device_t * rd,
+ u32 * next, u32 * bi, struct ibv_wc * wc,
+ u32 n_left_from, vlib_buffer_t * bt)
+{
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u32 n_rx_bytes[4] = { 0 };
+
+ vlib_get_buffers (vm, bi, bufs, n_left_from);
+ ASSERT (bt->buffer_pool_index == bufs[0]->buffer_pool_index);
+
+ while (n_left_from >= 4)
+ {
+ if (PREDICT_TRUE (n_left_from >= 8))
+ {
+ CLIB_PREFETCH (&wc[4 + 0], CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (&wc[4 + 1], CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (&wc[4 + 2], CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (&wc[4 + 3], CLIB_CACHE_LINE_BYTES, LOAD);
+ vlib_prefetch_buffer_header (b[4 + 0], STORE);
+ vlib_prefetch_buffer_header (b[4 + 1], STORE);
+ vlib_prefetch_buffer_header (b[4 + 2], STORE);
+ vlib_prefetch_buffer_header (b[4 + 3], STORE);
+ }
+
+ vlib_buffer_copy_indices (next, bi, 4);
+
+ vlib_buffer_copy_template (b[0], bt);
+ vlib_buffer_copy_template (b[1], bt);
+ vlib_buffer_copy_template (b[2], bt);
+ vlib_buffer_copy_template (b[3], bt);
- sg_entry.length = vlib_buffer_get_default_data_size (vm);
- sg_entry.lkey = rd->mr->lkey;
- wr.num_sge = 1;
- wr.sg_list = &sg_entry;
- wr.next = NULL;
- for (n = 0; n < n_alloc; n++)
+ b[0]->current_length = wc[0].byte_len;
+ b[1]->current_length = wc[1].byte_len;
+ b[2]->current_length = wc[2].byte_len;
+ b[3]->current_length = wc[3].byte_len;
+
+ n_rx_bytes[0] += wc[0].byte_len;
+ n_rx_bytes[1] += wc[1].byte_len;
+ n_rx_bytes[2] += wc[2].byte_len;
+ n_rx_bytes[3] += wc[3].byte_len;
+
+ next += 4;
+ bi += 4;
+ b += 4;
+ wc += 4;
+ n_left_from -= 4;
+ }
+
+ while (n_left_from >= 1)
{
- vlib_buffer_t *b = vlib_get_buffer (vm, buffers[n]);
- sg_entry.addr = vlib_buffer_get_va (b);
- wr.wr_id = buffers[n];
- if (ibv_post_recv (rxq->qp, &wr, &bad_wr) != 0)
- vlib_buffer_free (vm, buffers + n, 1);
- else
- rxq->n_enq++;
+ vlib_buffer_copy_indices (next, bi, 1);
+ vlib_buffer_copy_template (b[0], bt);
+ b[0]->current_length = wc[0].byte_len;
+ n_rx_bytes[0] += wc[0].byte_len;
+
+ next += 1;
+ bi += 1;
+ b += 1;
+ wc += 1;
+ n_left_from -= 1;
}
+
+ return n_rx_bytes[0] + n_rx_bytes[1] + n_rx_bytes[2] + n_rx_bytes[3];
}
static_always_inline uword
{
vnet_main_t *vnm = vnet_get_main ();
rdma_rxq_t *rxq = vec_elt_at_index (rd->rxqs, qid);
- u32 n_trace;
struct ibv_wc wc[VLIB_FRAME_SIZE];
- u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- u32 *bi, *to_next, n_left_to_next;
- int i;
- u32 n_rx_packets = 0, n_rx_bytes = 0;
+ vlib_buffer_t bt;
+ u32 next_index, *to_next, n_left_to_next;
+ u32 n_rx_packets, n_rx_bytes;
+ u32 slot, n_tail;
+
+ ASSERT (rxq->size >= VLIB_FRAME_SIZE && is_pow2 (rxq->size));
+ ASSERT (rxq->tail - rxq->head <= rxq->size);
n_rx_packets = ibv_poll_cq (rxq->cq, VLIB_FRAME_SIZE, wc);
+ ASSERT (n_rx_packets <= rxq->tail - rxq->head);
- if (n_rx_packets <= 0)
- rdma_device_input_refill (vm, rd, rxq);
+ if (PREDICT_FALSE (n_rx_packets <= 0))
+ {
+ rdma_device_input_refill (vm, rd, rxq);
+ return 0;
+ }
- if (PREDICT_FALSE (rd->per_interface_next_index != ~0))
- next_index = rd->per_interface_next_index;
+ /* init buffer template */
+ clib_memset_u64 (&bt, 0,
+ STRUCT_OFFSET_OF (vlib_buffer_t,
+ template_end) / sizeof (u64));
+ vnet_buffer (&bt)->sw_if_index[VLIB_RX] = rd->sw_if_index;
+ vnet_buffer (&bt)->sw_if_index[VLIB_TX] = ~0;
+ bt.buffer_pool_index = rd->pool;
+ bt.ref_count = 1;
- vlib_get_new_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ /* update buffer template for input feature arcs if any */
+ next_index = rd->per_interface_next_index;
+ if (PREDICT_FALSE (vnet_device_input_have_features (rd->sw_if_index)))
+ vnet_feature_start_device_input_x1 (rd->sw_if_index, &next_index, &bt);
- for (i = 0; i < n_rx_packets; i++)
- {
- u32 bi = wc[i].wr_id;
- vlib_buffer_t *b = vlib_get_buffer (vm, bi);
- b->current_length = wc[i].byte_len;
- vnet_buffer (b)->sw_if_index[VLIB_RX] = rd->sw_if_index;
- vnet_buffer (b)->sw_if_index[VLIB_TX] = ~0;
- to_next[i] = bi;
- n_rx_bytes += wc[i].byte_len;
- }
+ vlib_get_new_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ ASSERT (n_rx_packets <= n_left_to_next);
- if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
- {
- u32 n_left = n_rx_packets, i = 0;
- bi = to_next;
+ /*
+ * avoid wrap-around logic in core loop
+ * we requested VLIB_FRAME_SIZE packets and rxq->size >= VLIB_FRAME_SIZE
+ * => we can process all packets in 2 iterations max
+ */
+ slot = rxq->head & (rxq->size - 1);
+ n_tail = clib_min (n_rx_packets, rxq->size - slot);
+ n_rx_bytes =
+ rdma_device_input_bufs (vm, rd, &to_next[0], &rxq->bufs[slot], wc, n_tail,
+ &bt);
+ if (n_tail < n_rx_packets)
+ n_rx_bytes +=
+ rdma_device_input_bufs (vm, rd, &to_next[n_tail], &rxq->bufs[0],
+ &wc[n_tail], n_rx_packets - n_tail, &bt);
+ rdma_device_input_ethernet (vm, node, rd, next_index);
- while (n_trace && n_left)
- {
- vlib_buffer_t *b;
- rdma_input_trace_t *tr;
- b = vlib_get_buffer (vm, bi[0]);
- vlib_trace_buffer (vm, node, next_index, b, /* follow_chain */ 0);
- tr = vlib_add_trace (vm, node, b, sizeof (*tr));
- tr->next_index = next_index;
- tr->hw_if_index = rd->hw_if_index;
-
- /* next */
- n_trace--;
- n_left--;
- bi++;
- i++;
- }
- vlib_set_trace_count (vm, node, n_trace);
- }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next - n_rx_packets);
- if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
- {
- vlib_next_frame_t *nf;
- vlib_frame_t *f;
- ethernet_input_frame_t *ef;
- nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
- f = vlib_get_frame (vm, nf->frame_index);
- f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
-
- ef = vlib_frame_scalar_args (f);
- ef->sw_if_index = rd->sw_if_index;
- ef->hw_if_index = rd->hw_if_index;
- //f->flags |= ETH_INPUT_FRAME_F_IP4_CKSUM_OK;
- }
+ rxq->head += n_rx_packets;
- n_left_to_next -= n_rx_packets;
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ rdma_device_input_trace (vm, node, rd, n_rx_packets, to_next, next_index);
vlib_increment_combined_counter
(vnm->interface_main.combined_sw_if_counters +
VNET_INTERFACE_COUNTER_RX, vm->thread_index,
rd->hw_if_index, n_rx_packets, n_rx_bytes);
- rxq->n_enq -= n_rx_packets;
rdma_device_input_refill (vm, rd, rxq);
return n_rx_packets;
{
rdma_device_t *rd;
rd = vec_elt_at_index (rm->devices, dq->dev_instance);
- if ((rd->flags & RDMA_DEVICE_F_ADMIN_UP) == 0)
- continue;
- n_rx += rdma_device_input_inline (vm, node, frame, rd, dq->queue_id);
+ if (PREDICT_TRUE (rd->flags & RDMA_DEVICE_F_ADMIN_UP))
+ n_rx += rdma_device_input_inline (vm, node, frame, rd, dq->queue_id);
}
return n_rx;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (rdma_input_node) = {
.name = "rdma-input",
+ .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
.sibling_of = "device-input",
.format_trace = format_rdma_input_trace,
.type = VLIB_NODE_TYPE_INPUT,
Code Review / vpp.git / blobdiff