#undef _
};
+
+static_always_inline void
+ibv_set_recv_wr_and_sge (struct ibv_recv_wr *w, struct ibv_sge *s, u64 va,
+ u32 data_size, u32 lkey)
+{
+ s[0].addr = va;
+ s[0].length = data_size;
+ s[0].lkey = lkey;
+ w[0].next = w + 1;
+ w[0].sg_list = s;
+ w[0].num_sge = 1;
+}
+
static_always_inline void
rdma_device_input_refill (vlib_main_t * vm, rdma_device_t * rd,
rdma_rxq_t * rxq)
{
u32 n_alloc, n;
- 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);
+ u32 mask = rxq->size - 1;
+ u32 slot = rxq->tail & mask;
+ u32 *bufs = rxq->bufs + slot;
+ u32 data_size = vlib_buffer_get_default_data_size (vm);
+ u32 lkey = rd->lkey;
/* do not enqueue more packet than ring space */
n_alloc = clib_min (VLIB_FRAME_SIZE, rxq->size - (rxq->tail - rxq->head));
/* 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;
+ n_alloc &= ~7; /* round to 8 */
- vlib_get_buffers (vm, &rxq->bufs[slot], bufs, n_alloc);
+ n = vlib_buffer_alloc_to_ring_from_pool (vm, rxq->bufs, slot, rxq->size,
+ n_alloc, rd->pool);
- while (n >= 4)
+ if (PREDICT_FALSE (n != n_alloc))
{
- if (PREDICT_TRUE (n >= 8))
+ u32 n_free;
+ if (n < 8)
{
- CLIB_PREFETCH (&s[4 + 0], 4 * sizeof (s[0]), STORE);
- CLIB_PREFETCH (&w[4 + 0], 4 * sizeof (w[0]), STORE);
+ if (n)
+ vlib_buffer_free_from_ring (vm, rxq->bufs, slot, rxq->size, n);
+ return;
}
- 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;
+ /* partial allocation, round and return rest */
+ n_free = n - (n & 7);
+ n -= n_free;
+ if (n_free)
+ vlib_buffer_free_from_ring (vm, rxq->bufs, (slot + n) & mask,
+ rxq->size, n_free);
}
- while (n >= 1)
+ n_alloc = n;
+
+ while (n >= 8)
{
- s[0].addr = vlib_buffer_get_va (b[0]);
- s[0].length = vlib_buffer_get_default_data_size (vm);
- s[0].lkey = rd->lkey;
+ u64 va[8];
+ if (PREDICT_TRUE (n >= 16))
+ {
+ clib_prefetch_store (s + 16);
+ clib_prefetch_store (w + 16);
+ }
- w[0].next = &w[0] + 1;
- w[0].sg_list = &s[0];
- w[0].num_sge = 1;
+ vlib_get_buffers_with_offset (vm, bufs, (void **) va, 8,
+ sizeof (vlib_buffer_t));
- s += 1;
- w += 1;
- b += 1;
- n -= 1;
+ ibv_set_recv_wr_and_sge (w++, s++, va[0], data_size, lkey);
+ ibv_set_recv_wr_and_sge (w++, s++, va[1], data_size, lkey);
+ ibv_set_recv_wr_and_sge (w++, s++, va[2], data_size, lkey);
+ ibv_set_recv_wr_and_sge (w++, s++, va[3], data_size, lkey);
+ ibv_set_recv_wr_and_sge (w++, s++, va[4], data_size, lkey);
+ ibv_set_recv_wr_and_sge (w++, s++, va[5], data_size, lkey);
+ ibv_set_recv_wr_and_sge (w++, s++, va[6], data_size, lkey);
+ ibv_set_recv_wr_and_sge (w++, s++, va[7], data_size, lkey);
+
+ bufs += 8;
+ n -= 8;
}
w[-1].next = 0; /* fix next pointer in WR linked-list last item */
}
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)
+rdma_device_input_bufs (vlib_main_t * vm, const rdma_device_t * rd, 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 };
+ u32 n_rx_bytes = 0;
vlib_get_buffers (vm, bi, bufs, n_left_from);
ASSERT (bt->buffer_pool_index == bufs[0]->buffer_pool_index);
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);
- 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;
+ n_rx_bytes += b[0]->current_length = wc[0].byte_len;
+ n_rx_bytes += b[1]->current_length = wc[1].byte_len;
+ n_rx_bytes += b[2]->current_length = wc[2].byte_len;
+ n_rx_bytes += b[3]->current_length = wc[3].byte_len;
- next += 4;
- bi += 4;
b += 4;
wc += 4;
n_left_from -= 4;
while (n_left_from >= 1)
{
- 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;
+ n_rx_bytes += b[0]->current_length = 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];
+ return n_rx_bytes;
}
static_always_inline uword
vlib_buffer_t bt;
u32 next_index, *to_next, n_left_to_next;
u32 n_rx_packets, n_rx_bytes;
- u32 slot, n_tail;
+ u32 mask = rxq->size - 1;
ASSERT (rxq->size >= VLIB_FRAME_SIZE && is_pow2 (rxq->size));
ASSERT (rxq->tail - rxq->head <= rxq->size);
ASSERT (n_rx_packets <= rxq->tail - rxq->head);
if (PREDICT_FALSE (n_rx_packets <= 0))
- {
- rdma_device_input_refill (vm, rd, rxq);
- return 0;
- }
+ goto refill;
/* init buffer template */
vlib_buffer_copy_template (&bt, &ptd->buffer_template);
vlib_get_new_next_frame (vm, node, next_index, to_next, n_left_to_next);
ASSERT (n_rx_packets <= n_left_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);
+ vlib_buffer_copy_indices_from_ring (to_next, rxq->bufs, rxq->head & mask,
+ rxq->size, n_rx_packets);
+ n_rx_bytes = rdma_device_input_bufs (vm, rd, to_next, wc, n_rx_packets,
+ &bt);
+
rdma_device_input_ethernet (vm, node, rd, next_index);
vlib_put_next_frame (vm, node, next_index, n_left_to_next - n_rx_packets);
VNET_INTERFACE_COUNTER_RX, vm->thread_index,
rd->hw_if_index, n_rx_packets, n_rx_bytes);
+refill:
rdma_device_input_refill (vm, rd, rxq);
return n_rx_packets;