2 *------------------------------------------------------------------
3 * Copyright (c) 2016 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
21 #include <sys/ioctl.h>
24 #include <vlib/vlib.h>
25 #include <vlib/unix/unix.h>
26 #include <vnet/ethernet/ethernet.h>
27 #include <vnet/interface/rx_queue_funcs.h>
28 #include <vnet/feature/feature.h>
30 #include <memif/memif.h>
31 #include <memif/private.h>
33 #define foreach_memif_input_error \
34 _ (BUFFER_ALLOC_FAIL, buffer_alloc, ERROR, "buffer allocation failed") \
35 _ (BAD_DESC, bad_desc, ERROR, "bad descriptor") \
36 _ (NOT_IP, not_ip, INFO, "not ip packet")
40 #define _(f, n, s, d) MEMIF_INPUT_ERROR_##f,
41 foreach_memif_input_error
44 } memif_input_error_t;
46 static vlib_error_desc_t memif_input_error_counters[] = {
47 #define _(f, n, s, d) { #n, d, VL_COUNTER_SEVERITY_##s },
48 foreach_memif_input_error
57 } memif_input_trace_t;
59 static __clib_unused u8 *
60 format_memif_input_trace (u8 * s, va_list * args)
62 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
63 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
64 memif_input_trace_t *t = va_arg (*args, memif_input_trace_t *);
65 u32 indent = format_get_indent (s);
67 s = format (s, "memif: hw_if_index %d next-index %d",
68 t->hw_if_index, t->next_index);
69 s = format (s, "\n%Uslot: ring %u", format_white_space, indent + 2,
74 static_always_inline u32
75 memif_next_from_ip_hdr (vlib_node_runtime_t * node, vlib_buffer_t * b)
77 u8 *ptr = vlib_buffer_get_current (b);
80 if (PREDICT_TRUE (v == 0x40))
81 return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
82 else if (PREDICT_TRUE (v == 0x60))
83 return VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
85 b->error = node->errors[MEMIF_INPUT_ERROR_NOT_IP];
86 return VNET_DEVICE_INPUT_NEXT_DROP;
89 static_always_inline void
90 memif_trace_buffer (vlib_main_t * vm, vlib_node_runtime_t * node,
91 memif_if_t * mif, vlib_buffer_t * b, u32 next, u16 qid,
95 (b != 0 && vlib_trace_buffer (vm, node, next, b, /* follow_chain */ 0)))
97 memif_input_trace_t *tr;
98 vlib_set_trace_count (vm, node, --(*n_tracep));
99 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
100 tr->next_index = next;
101 tr->hw_if_index = mif->hw_if_index;
106 static_always_inline void
107 memif_add_copy_op (memif_per_thread_data_t * ptd, void *data, u32 len,
108 u16 buffer_offset, u16 buffer_vec_index)
111 vec_add2_aligned (ptd->copy_ops, co, 1, CLIB_CACHE_LINE_BYTES);
114 co->buffer_offset = buffer_offset;
115 co->buffer_vec_index = buffer_vec_index;
118 static_always_inline void
119 memif_add_to_chain (vlib_main_t * vm, vlib_buffer_t * b, u32 * buffers,
122 vlib_buffer_t *seg = b;
123 i32 bytes_left = b->current_length - buffer_size + b->current_data;
125 if (PREDICT_TRUE (bytes_left <= 0))
128 b->current_length -= bytes_left;
129 b->total_length_not_including_first_buffer = bytes_left;
133 seg->flags |= VLIB_BUFFER_NEXT_PRESENT;
134 seg->next_buffer = buffers[0];
135 seg = vlib_get_buffer (vm, buffers[0]);
137 seg->current_data = 0;
138 seg->current_length = clib_min (buffer_size, bytes_left);
139 bytes_left -= seg->current_length;
143 static_always_inline u32
144 sat_sub (u32 x, u32 y)
151 /* branchless validation of the descriptor - uses saturated subtraction */
152 static_always_inline u32
153 memif_desc_is_invalid (memif_if_t * mif, memif_desc_t * d, u32 buffer_length)
156 u16 valid_flags = MEMIF_DESC_FLAG_NEXT;
158 rv = d->flags & (~valid_flags);
159 rv |= sat_sub (d->region + 1, vec_len (mif->regions));
160 rv |= sat_sub (d->length, buffer_length);
161 rv |= sat_sub (d->offset + d->length, mif->regions[d->region].region_size);
163 if (PREDICT_FALSE (rv))
165 mif->flags |= MEMIF_IF_FLAG_ERROR;
172 static_always_inline uword
173 memif_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
174 vlib_frame_t * frame, memif_if_t * mif,
175 memif_ring_type_t type, u16 qid,
176 memif_interface_mode_t mode)
178 vnet_main_t *vnm = vnet_get_main ();
179 memif_main_t *mm = &memif_main;
182 u16 buffer_size = vlib_buffer_get_default_data_size (vm);
183 uword n_trace = vlib_get_trace_count (vm, node);
184 u16 nexts[MEMIF_RX_VECTOR_SZ], *next = nexts;
185 u32 _to_next_bufs[MEMIF_RX_VECTOR_SZ], *to_next_bufs = _to_next_bufs, *bi;
186 u32 n_rx_packets = 0, n_rx_bytes = 0;
187 u32 n_left, n_left_to_next;
188 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
189 vlib_buffer_t *b0, *b1, *b2, *b3;
190 u32 thread_index = vm->thread_index;
191 memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
194 u16 cur_slot, last_slot, ring_size, n_slots, mask;
196 u16 n_buffers = 0, n_alloc;
198 memif_packet_op_t *po;
199 memif_region_index_t last_region = ~0;
200 void *last_region_shm = 0;
201 void *last_region_max = 0;
203 mq = vec_elt_at_index (mif->rx_queues, qid);
205 ring_size = 1 << mq->log2_ring_size;
206 mask = ring_size - 1;
208 /* assume that somebody will want to add ethernet header on the packet
209 so start with IP header at offset 14 */
210 start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
212 /* for S2M rings, we are consumers of packet buffers, and for M2S rings we
213 are producers of empty buffers */
214 cur_slot = (type == MEMIF_RING_S2M) ? mq->last_head : mq->last_tail;
216 if (type == MEMIF_RING_S2M)
217 last_slot = __atomic_load_n (&ring->head, __ATOMIC_ACQUIRE);
219 last_slot = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
221 if (cur_slot == last_slot)
223 n_slots = last_slot - cur_slot;
225 /* construct copy and packet vector out of ring slots */
226 while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
228 u32 dst_off, src_off, n_bytes_left;
232 po = ptd->packet_ops + n_rx_packets;
234 po->first_buffer_vec_index = n_buffers++;
237 dst_off = start_offset;
240 CLIB_PREFETCH (&ring->desc[(cur_slot + 8) & mask],
241 CLIB_CACHE_LINE_BYTES, LOAD);
242 s0 = cur_slot & mask;
243 d0 = &ring->desc[s0];
244 n_bytes_left = d0->length;
246 /* slave resets buffer length,
247 * so it can produce full size buffer for master
249 if (type == MEMIF_RING_M2S)
250 d0->length = mif->run.buffer_size;
252 po->packet_len += n_bytes_left;
253 if (PREDICT_FALSE (last_region != d0->region))
255 last_region_shm = mif->regions[d0->region].shm;
256 last_region = d0->region;
258 last_region_shm + mif->regions[last_region].region_size;
260 mb0 = last_region_shm + d0->offset;
262 if (PREDICT_FALSE (mb0 + n_bytes_left > last_region_max))
263 vlib_error_count (vm, node->node_index, MEMIF_INPUT_ERROR_BAD_DESC, 1);
267 u32 dst_free = buffer_size - dst_off;
271 dst_free = buffer_size;
274 u32 bytes_to_copy = clib_min (dst_free, n_bytes_left);
275 memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off,
277 n_bytes_left -= bytes_to_copy;
278 src_off += bytes_to_copy;
279 dst_off += bytes_to_copy;
281 while (PREDICT_FALSE (n_bytes_left));
285 if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
292 /* allocate free buffers */
293 vec_validate_aligned (ptd->buffers, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
294 n_alloc = vlib_buffer_alloc_from_pool (vm, ptd->buffers, n_buffers,
295 mq->buffer_pool_index);
296 if (PREDICT_FALSE (n_alloc != n_buffers))
299 vlib_buffer_free (vm, ptd->buffers, n_alloc);
300 vlib_error_count (vm, node->node_index,
301 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
306 n_left = vec_len (ptd->copy_ops);
310 CLIB_PREFETCH (co[4].data, CLIB_CACHE_LINE_BYTES, LOAD);
311 CLIB_PREFETCH (co[5].data, CLIB_CACHE_LINE_BYTES, LOAD);
312 CLIB_PREFETCH (co[6].data, CLIB_CACHE_LINE_BYTES, LOAD);
313 CLIB_PREFETCH (co[7].data, CLIB_CACHE_LINE_BYTES, LOAD);
315 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
316 b1 = vlib_get_buffer (vm, ptd->buffers[co[1].buffer_vec_index]);
317 b2 = vlib_get_buffer (vm, ptd->buffers[co[2].buffer_vec_index]);
318 b3 = vlib_get_buffer (vm, ptd->buffers[co[3].buffer_vec_index]);
320 clib_memcpy_fast (b0->data + co[0].buffer_offset, co[0].data,
322 clib_memcpy_fast (b1->data + co[1].buffer_offset, co[1].data,
324 clib_memcpy_fast (b2->data + co[2].buffer_offset, co[2].data,
326 clib_memcpy_fast (b3->data + co[3].buffer_offset, co[3].data,
334 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
335 clib_memcpy_fast (b0->data + co[0].buffer_offset, co[0].data,
341 /* release slots from the ring */
342 if (type == MEMIF_RING_S2M)
344 __atomic_store_n (&ring->tail, cur_slot, __ATOMIC_RELEASE);
345 mq->last_head = cur_slot;
349 mq->last_tail = cur_slot;
352 /* prepare buffer template and next indices */
353 vnet_buffer (&ptd->buffer_template)->sw_if_index[VLIB_RX] =
355 vnet_buffer (&ptd->buffer_template)->feature_arc_index = 0;
356 ptd->buffer_template.current_data = start_offset;
357 ptd->buffer_template.current_config_index = 0;
358 ptd->buffer_template.buffer_pool_index = mq->buffer_pool_index;
359 ptd->buffer_template.ref_count = 1;
361 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
363 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
364 if (mif->per_interface_next_index != ~0)
365 next_index = mif->per_interface_next_index;
367 vnet_feature_start_device_input_x1 (mif->sw_if_index, &next_index,
368 &ptd->buffer_template);
370 vlib_get_new_next_frame (vm, node, next_index, to_next_bufs,
372 if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
374 vlib_next_frame_t *nf;
376 ethernet_input_frame_t *ef;
377 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
378 f = vlib_get_frame (vm, nf->frame);
379 f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
381 ef = vlib_frame_scalar_args (f);
382 ef->sw_if_index = mif->sw_if_index;
383 ef->hw_if_index = mif->hw_if_index;
384 vlib_frame_no_append (f);
388 /* process buffer metadata */
389 u32 n_from = n_rx_packets;
390 po = ptd->packet_ops;
393 /* copy template into local variable - will save per packet load */
394 vlib_buffer_copy_template (&bt, &ptd->buffer_template);
398 b0 = vlib_get_buffer (vm, ptd->buffers[po[0].first_buffer_vec_index]);
399 b1 = vlib_get_buffer (vm, ptd->buffers[po[1].first_buffer_vec_index]);
400 b2 = vlib_get_buffer (vm, ptd->buffers[po[2].first_buffer_vec_index]);
401 b3 = vlib_get_buffer (vm, ptd->buffers[po[3].first_buffer_vec_index]);
403 vlib_prefetch_buffer_header (b0, STORE);
404 vlib_prefetch_buffer_header (b1, STORE);
405 vlib_prefetch_buffer_header (b2, STORE);
406 vlib_prefetch_buffer_header (b3, STORE);
410 fbvi[0] = po[0].first_buffer_vec_index;
411 fbvi[1] = po[1].first_buffer_vec_index;
412 fbvi[2] = po[2].first_buffer_vec_index;
413 fbvi[3] = po[3].first_buffer_vec_index;
415 bi[0] = ptd->buffers[fbvi[0]];
416 bi[1] = ptd->buffers[fbvi[1]];
417 bi[2] = ptd->buffers[fbvi[2]];
418 bi[3] = ptd->buffers[fbvi[3]];
420 b0 = vlib_get_buffer (vm, bi[0]);
421 b1 = vlib_get_buffer (vm, bi[1]);
422 b2 = vlib_get_buffer (vm, bi[2]);
423 b3 = vlib_get_buffer (vm, bi[3]);
425 vlib_buffer_copy_template (b0, &bt);
426 vlib_buffer_copy_template (b1, &bt);
427 vlib_buffer_copy_template (b2, &bt);
428 vlib_buffer_copy_template (b3, &bt);
430 b0->current_length = po[0].packet_len;
431 n_rx_bytes += b0->current_length;
432 b1->current_length = po[1].packet_len;
433 n_rx_bytes += b1->current_length;
434 b2->current_length = po[2].packet_len;
435 n_rx_bytes += b2->current_length;
436 b3->current_length = po[3].packet_len;
437 n_rx_bytes += b3->current_length;
439 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
440 memif_add_to_chain (vm, b1, ptd->buffers + fbvi[1] + 1, buffer_size);
441 memif_add_to_chain (vm, b2, ptd->buffers + fbvi[2] + 1, buffer_size);
442 memif_add_to_chain (vm, b3, ptd->buffers + fbvi[3] + 1, buffer_size);
444 if (mode == MEMIF_INTERFACE_MODE_IP)
446 next[0] = memif_next_from_ip_hdr (node, b0);
447 next[1] = memif_next_from_ip_hdr (node, b1);
448 next[2] = memif_next_from_ip_hdr (node, b2);
449 next[3] = memif_next_from_ip_hdr (node, b3);
462 fbvi[0] = po[0].first_buffer_vec_index;
463 bi[0] = ptd->buffers[fbvi[0]];
464 b0 = vlib_get_buffer (vm, bi[0]);
465 vlib_buffer_copy_template (b0, &bt);
466 b0->current_length = po->packet_len;
467 n_rx_bytes += b0->current_length;
469 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
471 if (mode == MEMIF_INTERFACE_MODE_IP)
473 next[0] = memif_next_from_ip_hdr (node, b0);
483 /* packet trace if enabled */
484 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
486 u32 n_left = n_rx_packets;
490 while (n_trace && n_left)
493 memif_input_trace_t *tr;
494 if (mode != MEMIF_INTERFACE_MODE_ETHERNET)
496 b = vlib_get_buffer (vm, bi[0]);
498 (vlib_trace_buffer (vm, node, ni, b, /* follow_chain */ 0)))
500 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
502 tr->hw_if_index = mif->hw_if_index;
512 vlib_set_trace_count (vm, node, n_trace);
515 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
517 n_left_to_next -= n_rx_packets;
518 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
521 vlib_buffer_enqueue_to_next (vm, node, to_next_bufs, nexts, n_rx_packets);
523 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
524 + VNET_INTERFACE_COUNTER_RX, thread_index,
525 mif->sw_if_index, n_rx_packets,
528 /* refill ring with empty buffers */
530 vec_reset_length (ptd->buffers);
531 vec_reset_length (ptd->copy_ops);
533 if (type == MEMIF_RING_M2S)
535 u16 head = ring->head;
536 n_slots = ring_size - head + mq->last_tail;
540 u16 s = head++ & mask;
541 memif_desc_t *d = &ring->desc[s];
542 d->length = mif->run.buffer_size;
545 __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
551 static_always_inline uword
552 memif_device_input_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
553 vlib_frame_t * frame, memif_if_t * mif,
554 u16 qid, memif_interface_mode_t mode)
556 vnet_main_t *vnm = vnet_get_main ();
557 memif_main_t *mm = &memif_main;
561 uword n_trace = vlib_get_trace_count (vm, node);
562 u32 n_rx_packets = 0, n_rx_bytes = 0;
563 u32 *to_next = 0, *buffers;
564 u32 bi0, bi1, bi2, bi3;
566 memif_desc_t *d0, *d1, *d2, *d3;
567 vlib_buffer_t *b0, *b1, *b2, *b3;
568 u32 thread_index = vm->thread_index;
569 memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
571 u16 cur_slot, last_slot, ring_size, n_slots, mask, head;
576 mq = vec_elt_at_index (mif->rx_queues, qid);
578 ring_size = 1 << mq->log2_ring_size;
579 mask = ring_size - 1;
581 next_index = (mode == MEMIF_INTERFACE_MODE_IP) ?
582 VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
584 /* asume that somebody will want to add ethernet header on the packet
585 so start with IP header at offset 14 */
586 start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
587 buffer_length = vlib_buffer_get_default_data_size (vm) - start_offset;
589 cur_slot = mq->last_tail;
590 last_slot = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
591 if (cur_slot == last_slot)
593 n_slots = last_slot - cur_slot;
595 /* process ring slots */
596 vec_validate_aligned (ptd->buffers, MEMIF_RX_VECTOR_SZ,
597 CLIB_CACHE_LINE_BYTES);
598 while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
602 s0 = cur_slot & mask;
603 bi0 = mq->buffers[s0];
604 ptd->buffers[n_rx_packets++] = bi0;
606 CLIB_PREFETCH (&ring->desc[(cur_slot + 8) & mask],
607 CLIB_CACHE_LINE_BYTES, LOAD);
608 d0 = &ring->desc[s0];
609 hb = b0 = vlib_get_buffer (vm, bi0);
610 b0->current_data = start_offset;
611 b0->current_length = d0->length;
612 n_rx_bytes += d0->length;
614 if (0 && memif_desc_is_invalid (mif, d0, buffer_length))
619 if (PREDICT_FALSE ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots))
621 hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
623 s0 = cur_slot & mask;
624 d0 = &ring->desc[s0];
625 bi0 = mq->buffers[s0];
627 /* previous buffer */
628 b0->next_buffer = bi0;
629 b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
632 b0 = vlib_get_buffer (vm, bi0);
633 b0->current_data = start_offset;
634 b0->current_length = d0->length;
635 hb->total_length_not_including_first_buffer += d0->length;
636 n_rx_bytes += d0->length;
640 if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
645 /* release slots from the ring */
646 mq->last_tail = cur_slot;
648 n_from = n_rx_packets;
649 buffers = ptd->buffers;
654 u32 next0, next1, next2, next3;
656 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
657 while (n_from >= 8 && n_left_to_next >= 4)
659 b0 = vlib_get_buffer (vm, buffers[4]);
660 b1 = vlib_get_buffer (vm, buffers[5]);
661 b2 = vlib_get_buffer (vm, buffers[6]);
662 b3 = vlib_get_buffer (vm, buffers[7]);
663 vlib_prefetch_buffer_header (b0, STORE);
664 vlib_prefetch_buffer_header (b1, STORE);
665 vlib_prefetch_buffer_header (b2, STORE);
666 vlib_prefetch_buffer_header (b3, STORE);
669 to_next[0] = bi0 = buffers[0];
670 to_next[1] = bi1 = buffers[1];
671 to_next[2] = bi2 = buffers[2];
672 to_next[3] = bi3 = buffers[3];
677 b0 = vlib_get_buffer (vm, bi0);
678 b1 = vlib_get_buffer (vm, bi1);
679 b2 = vlib_get_buffer (vm, bi2);
680 b3 = vlib_get_buffer (vm, bi3);
682 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
683 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
684 vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index;
685 vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0;
686 vnet_buffer (b2)->sw_if_index[VLIB_RX] = mif->sw_if_index;
687 vnet_buffer (b2)->sw_if_index[VLIB_TX] = ~0;
688 vnet_buffer (b3)->sw_if_index[VLIB_RX] = mif->sw_if_index;
689 vnet_buffer (b3)->sw_if_index[VLIB_TX] = ~0;
691 if (mode == MEMIF_INTERFACE_MODE_IP)
693 next0 = memif_next_from_ip_hdr (node, b0);
694 next1 = memif_next_from_ip_hdr (node, b1);
695 next2 = memif_next_from_ip_hdr (node, b2);
696 next3 = memif_next_from_ip_hdr (node, b3);
698 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
700 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
702 next0 = mif->per_interface_next_index;
703 next1 = mif->per_interface_next_index;
704 next2 = mif->per_interface_next_index;
705 next3 = mif->per_interface_next_index;
709 next0 = next1 = next2 = next3 = next_index;
710 /* redirect if feature path enabled */
711 vnet_feature_start_device_input_x1 (mif->sw_if_index,
713 vnet_feature_start_device_input_x1 (mif->sw_if_index,
715 vnet_feature_start_device_input_x1 (mif->sw_if_index,
717 vnet_feature_start_device_input_x1 (mif->sw_if_index,
723 if (PREDICT_FALSE (n_trace > 0))
725 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
726 if (PREDICT_FALSE (n_trace > 0))
727 memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace);
728 if (PREDICT_FALSE (n_trace > 0))
729 memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace);
730 if (PREDICT_FALSE (n_trace > 0))
731 memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace);
735 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
736 n_left_to_next, bi0, bi1, bi2, bi3,
737 next0, next1, next2, next3);
742 while (n_from && n_left_to_next)
745 to_next[0] = bi0 = buffers[0];
750 b0 = vlib_get_buffer (vm, bi0);
751 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
752 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
754 if (mode == MEMIF_INTERFACE_MODE_IP)
756 next0 = memif_next_from_ip_hdr (node, b0);
758 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
760 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
761 next0 = mif->per_interface_next_index;
765 /* redirect if feature path enabled */
766 vnet_feature_start_device_input_x1 (mif->sw_if_index,
772 if (PREDICT_FALSE (n_trace > 0))
773 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
776 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
777 n_left_to_next, bi0, next0);
782 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
785 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
786 + VNET_INTERFACE_COUNTER_RX, thread_index,
787 mif->sw_if_index, n_rx_packets,
790 /* refill ring with empty buffers */
792 vec_reset_length (ptd->buffers);
795 n_slots = ring_size - head + mq->last_tail;
800 memif_desc_t *dt = &ptd->desc_template;
801 clib_memset (dt, 0, sizeof (memif_desc_t));
802 dt->length = buffer_length;
804 n_alloc = vlib_buffer_alloc_to_ring_from_pool (vm, mq->buffers, head & mask,
806 mq->buffer_pool_index);
808 if (PREDICT_FALSE (n_alloc != n_slots))
810 vlib_error_count (vm, node->node_index,
811 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
814 while (n_alloc >= 32)
816 bi0 = mq->buffers[(head + 4) & mask];
817 vlib_prefetch_buffer_with_index (vm, bi0, LOAD);
818 bi1 = mq->buffers[(head + 5) & mask];
819 vlib_prefetch_buffer_with_index (vm, bi1, LOAD);
820 bi2 = mq->buffers[(head + 6) & mask];
821 vlib_prefetch_buffer_with_index (vm, bi2, LOAD);
822 bi3 = mq->buffers[(head + 7) & mask];
823 vlib_prefetch_buffer_with_index (vm, bi3, LOAD);
830 d0 = &ring->desc[s0];
831 d1 = &ring->desc[s1];
832 d2 = &ring->desc[s2];
833 d3 = &ring->desc[s3];
835 clib_memcpy_fast (d0, dt, sizeof (memif_desc_t));
836 clib_memcpy_fast (d1, dt, sizeof (memif_desc_t));
837 clib_memcpy_fast (d2, dt, sizeof (memif_desc_t));
838 clib_memcpy_fast (d3, dt, sizeof (memif_desc_t));
840 b0 = vlib_get_buffer (vm, mq->buffers[s0]);
841 b1 = vlib_get_buffer (vm, mq->buffers[s1]);
842 b2 = vlib_get_buffer (vm, mq->buffers[s2]);
843 b3 = vlib_get_buffer (vm, mq->buffers[s3]);
845 d0->region = b0->buffer_pool_index + 1;
846 d1->region = b1->buffer_pool_index + 1;
847 d2->region = b2->buffer_pool_index + 1;
848 d3->region = b3->buffer_pool_index + 1;
851 (void *) b0->data - mif->regions[d0->region].shm + start_offset;
853 (void *) b1->data - mif->regions[d1->region].shm + start_offset;
855 (void *) b2->data - mif->regions[d2->region].shm + start_offset;
857 (void *) b3->data - mif->regions[d3->region].shm + start_offset;
864 d0 = &ring->desc[s0];
865 clib_memcpy_fast (d0, dt, sizeof (memif_desc_t));
866 b0 = vlib_get_buffer (vm, mq->buffers[s0]);
867 d0->region = b0->buffer_pool_index + 1;
869 (void *) b0->data - mif->regions[d0->region].shm + start_offset;
874 __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
881 VLIB_NODE_FN (memif_input_node) (vlib_main_t * vm,
882 vlib_node_runtime_t * node,
883 vlib_frame_t * frame)
886 memif_main_t *mm = &memif_main;
887 memif_interface_mode_t mode_ip = MEMIF_INTERFACE_MODE_IP;
888 memif_interface_mode_t mode_eth = MEMIF_INTERFACE_MODE_ETHERNET;
890 vnet_hw_if_rxq_poll_vector_t *pv;
891 pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
892 for (int i = 0; i < vec_len (pv); i++)
896 mif = vec_elt_at_index (mm->interfaces, pv[i].dev_instance);
897 qid = pv[i].queue_id;
898 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) &&
899 (mif->flags & MEMIF_IF_FLAG_CONNECTED))
901 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
903 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
904 n_rx += memif_device_input_zc_inline (vm, node, frame, mif,
907 n_rx += memif_device_input_zc_inline (vm, node, frame, mif,
910 else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
912 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
913 n_rx += memif_device_input_inline (
914 vm, node, frame, mif, MEMIF_RING_M2S, qid, mode_ip);
916 n_rx += memif_device_input_inline (
917 vm, node, frame, mif, MEMIF_RING_M2S, qid, mode_eth);
921 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
922 n_rx += memif_device_input_inline (
923 vm, node, frame, mif, MEMIF_RING_S2M, qid, mode_ip);
925 n_rx += memif_device_input_inline (
926 vm, node, frame, mif, MEMIF_RING_S2M, qid, mode_eth);
935 VLIB_REGISTER_NODE (memif_input_node) = {
936 .name = "memif-input",
937 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
938 .sibling_of = "device-input",
939 .format_trace = format_memif_input_trace,
940 .type = VLIB_NODE_TYPE_INPUT,
941 .state = VLIB_NODE_STATE_INTERRUPT,
942 .n_errors = MEMIF_INPUT_N_ERROR,
943 .error_counters = memif_input_error_counters,
950 * fd.io coding-style-patch-verification: ON
953 * eval: (c-set-style "gnu")