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 uword
144 memif_device_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
145 memif_if_t *mif, memif_ring_type_t type, u16 qid,
146 memif_interface_mode_t mode)
148 vnet_main_t *vnm = vnet_get_main ();
149 memif_main_t *mm = &memif_main;
152 u16 buffer_size = vlib_buffer_get_default_data_size (vm);
154 u16 nexts[MEMIF_RX_VECTOR_SZ], *next = nexts;
155 u32 _to_next_bufs[MEMIF_RX_VECTOR_SZ], *to_next_bufs = _to_next_bufs, *bi;
156 u32 n_rx_packets = 0, n_rx_bytes = 0;
157 u32 n_left, n_left_to_next;
158 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
159 vlib_buffer_t *b0, *b1, *b2, *b3;
160 u32 thread_index = vm->thread_index;
161 memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
164 u16 cur_slot, last_slot, ring_size, n_slots, mask;
166 u16 n_buffers = 0, n_alloc;
168 memif_packet_op_t *po;
169 memif_region_index_t last_region = ~0;
170 void *last_region_shm = 0;
171 void *last_region_max = 0;
173 mq = vec_elt_at_index (mif->rx_queues, qid);
175 ring_size = 1 << mq->log2_ring_size;
176 mask = ring_size - 1;
178 /* assume that somebody will want to add ethernet header on the packet
179 so start with IP header at offset 14 */
180 start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
182 /* for S2M rings, we are consumers of packet buffers, and for M2S rings we
183 are producers of empty buffers */
184 cur_slot = (type == MEMIF_RING_S2M) ? mq->last_head : mq->last_tail;
186 if (type == MEMIF_RING_S2M)
187 last_slot = __atomic_load_n (&ring->head, __ATOMIC_ACQUIRE);
189 last_slot = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
191 if (cur_slot == last_slot)
193 n_slots = last_slot - cur_slot;
195 /* construct copy and packet vector out of ring slots */
196 while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
198 u32 dst_off, src_off, n_bytes_left;
202 po = ptd->packet_ops + n_rx_packets;
204 po->first_buffer_vec_index = n_buffers++;
207 dst_off = start_offset;
210 clib_prefetch_load (&ring->desc[(cur_slot + 8) & mask]);
211 s0 = cur_slot & mask;
212 d0 = &ring->desc[s0];
213 n_bytes_left = d0->length;
215 /* slave resets buffer length,
216 * so it can produce full size buffer for master
218 if (type == MEMIF_RING_M2S)
219 d0->length = mif->run.buffer_size;
221 po->packet_len += n_bytes_left;
222 if (PREDICT_FALSE (last_region != d0->region))
224 last_region_shm = mif->regions[d0->region].shm;
225 last_region = d0->region;
227 last_region_shm + mif->regions[last_region].region_size;
229 mb0 = last_region_shm + d0->offset;
231 if (PREDICT_FALSE (mb0 + n_bytes_left > last_region_max))
232 vlib_error_count (vm, node->node_index, MEMIF_INPUT_ERROR_BAD_DESC, 1);
236 u32 dst_free = buffer_size - dst_off;
240 dst_free = buffer_size;
243 u32 bytes_to_copy = clib_min (dst_free, n_bytes_left);
244 memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off,
246 n_bytes_left -= bytes_to_copy;
247 src_off += bytes_to_copy;
248 dst_off += bytes_to_copy;
250 while (PREDICT_FALSE (n_bytes_left));
254 if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
261 /* allocate free buffers */
262 vec_validate_aligned (ptd->buffers, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
263 n_alloc = vlib_buffer_alloc_from_pool (vm, ptd->buffers, n_buffers,
264 mq->buffer_pool_index);
265 if (PREDICT_FALSE (n_alloc != n_buffers))
268 vlib_buffer_free (vm, ptd->buffers, n_alloc);
269 vlib_error_count (vm, node->node_index,
270 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
275 n_left = vec_len (ptd->copy_ops);
279 clib_prefetch_load (co[4].data);
280 clib_prefetch_load (co[5].data);
281 clib_prefetch_load (co[6].data);
282 clib_prefetch_load (co[7].data);
284 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
285 b1 = vlib_get_buffer (vm, ptd->buffers[co[1].buffer_vec_index]);
286 b2 = vlib_get_buffer (vm, ptd->buffers[co[2].buffer_vec_index]);
287 b3 = vlib_get_buffer (vm, ptd->buffers[co[3].buffer_vec_index]);
289 clib_memcpy_fast (b0->data + co[0].buffer_offset, co[0].data,
291 clib_memcpy_fast (b1->data + co[1].buffer_offset, co[1].data,
293 clib_memcpy_fast (b2->data + co[2].buffer_offset, co[2].data,
295 clib_memcpy_fast (b3->data + co[3].buffer_offset, co[3].data,
303 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
304 clib_memcpy_fast (b0->data + co[0].buffer_offset, co[0].data,
310 /* release slots from the ring */
311 if (type == MEMIF_RING_S2M)
313 __atomic_store_n (&ring->tail, cur_slot, __ATOMIC_RELEASE);
314 mq->last_head = cur_slot;
318 mq->last_tail = cur_slot;
321 /* prepare buffer template and next indices */
322 vnet_buffer (&ptd->buffer_template)->sw_if_index[VLIB_RX] =
324 vnet_buffer (&ptd->buffer_template)->feature_arc_index = 0;
325 ptd->buffer_template.current_data = start_offset;
326 ptd->buffer_template.current_config_index = 0;
327 ptd->buffer_template.buffer_pool_index = mq->buffer_pool_index;
328 ptd->buffer_template.ref_count = 1;
330 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
332 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
333 if (mif->per_interface_next_index != ~0)
334 next_index = mif->per_interface_next_index;
336 vnet_feature_start_device_input_x1 (mif->sw_if_index, &next_index,
337 &ptd->buffer_template);
339 vlib_get_new_next_frame (vm, node, next_index, to_next_bufs,
341 if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
343 vlib_next_frame_t *nf;
345 ethernet_input_frame_t *ef;
346 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
347 f = vlib_get_frame (vm, nf->frame);
348 f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
350 ef = vlib_frame_scalar_args (f);
351 ef->sw_if_index = mif->sw_if_index;
352 ef->hw_if_index = mif->hw_if_index;
353 vlib_frame_no_append (f);
357 /* process buffer metadata */
358 u32 n_from = n_rx_packets;
359 po = ptd->packet_ops;
362 /* copy template into local variable - will save per packet load */
363 vlib_buffer_copy_template (&bt, &ptd->buffer_template);
367 b0 = vlib_get_buffer (vm, ptd->buffers[po[4].first_buffer_vec_index]);
368 b1 = vlib_get_buffer (vm, ptd->buffers[po[5].first_buffer_vec_index]);
369 b2 = vlib_get_buffer (vm, ptd->buffers[po[6].first_buffer_vec_index]);
370 b3 = vlib_get_buffer (vm, ptd->buffers[po[7].first_buffer_vec_index]);
372 vlib_prefetch_buffer_header (b0, STORE);
373 vlib_prefetch_buffer_header (b1, STORE);
374 vlib_prefetch_buffer_header (b2, STORE);
375 vlib_prefetch_buffer_header (b3, STORE);
379 fbvi[0] = po[0].first_buffer_vec_index;
380 fbvi[1] = po[1].first_buffer_vec_index;
381 fbvi[2] = po[2].first_buffer_vec_index;
382 fbvi[3] = po[3].first_buffer_vec_index;
384 bi[0] = ptd->buffers[fbvi[0]];
385 bi[1] = ptd->buffers[fbvi[1]];
386 bi[2] = ptd->buffers[fbvi[2]];
387 bi[3] = ptd->buffers[fbvi[3]];
389 b0 = vlib_get_buffer (vm, bi[0]);
390 b1 = vlib_get_buffer (vm, bi[1]);
391 b2 = vlib_get_buffer (vm, bi[2]);
392 b3 = vlib_get_buffer (vm, bi[3]);
394 vlib_buffer_copy_template (b0, &bt);
395 vlib_buffer_copy_template (b1, &bt);
396 vlib_buffer_copy_template (b2, &bt);
397 vlib_buffer_copy_template (b3, &bt);
399 b0->current_length = po[0].packet_len;
400 n_rx_bytes += b0->current_length;
401 b1->current_length = po[1].packet_len;
402 n_rx_bytes += b1->current_length;
403 b2->current_length = po[2].packet_len;
404 n_rx_bytes += b2->current_length;
405 b3->current_length = po[3].packet_len;
406 n_rx_bytes += b3->current_length;
408 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
409 memif_add_to_chain (vm, b1, ptd->buffers + fbvi[1] + 1, buffer_size);
410 memif_add_to_chain (vm, b2, ptd->buffers + fbvi[2] + 1, buffer_size);
411 memif_add_to_chain (vm, b3, ptd->buffers + fbvi[3] + 1, buffer_size);
413 if (mode == MEMIF_INTERFACE_MODE_IP)
415 next[0] = memif_next_from_ip_hdr (node, b0);
416 next[1] = memif_next_from_ip_hdr (node, b1);
417 next[2] = memif_next_from_ip_hdr (node, b2);
418 next[3] = memif_next_from_ip_hdr (node, b3);
431 fbvi[0] = po[0].first_buffer_vec_index;
432 bi[0] = ptd->buffers[fbvi[0]];
433 b0 = vlib_get_buffer (vm, bi[0]);
434 vlib_buffer_copy_template (b0, &bt);
435 b0->current_length = po->packet_len;
436 n_rx_bytes += b0->current_length;
438 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
440 if (mode == MEMIF_INTERFACE_MODE_IP)
442 next[0] = memif_next_from_ip_hdr (node, b0);
452 /* packet trace if enabled */
453 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
455 u32 n_left = n_rx_packets;
459 while (n_trace && n_left)
462 memif_input_trace_t *tr;
463 if (mode != MEMIF_INTERFACE_MODE_ETHERNET)
465 b = vlib_get_buffer (vm, bi[0]);
467 (vlib_trace_buffer (vm, node, ni, b, /* follow_chain */ 0)))
469 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
471 tr->hw_if_index = mif->hw_if_index;
481 vlib_set_trace_count (vm, node, n_trace);
484 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
486 n_left_to_next -= n_rx_packets;
487 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
490 vlib_buffer_enqueue_to_next (vm, node, to_next_bufs, nexts, n_rx_packets);
492 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
493 + VNET_INTERFACE_COUNTER_RX, thread_index,
494 mif->sw_if_index, n_rx_packets,
497 /* refill ring with empty buffers */
499 vec_reset_length (ptd->buffers);
500 vec_reset_length (ptd->copy_ops);
502 if (type == MEMIF_RING_M2S)
504 u16 head = ring->head;
505 n_slots = ring_size - head + mq->last_tail;
509 u16 s = head++ & mask;
510 memif_desc_t *d = &ring->desc[s];
511 d->length = mif->run.buffer_size;
514 __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
520 static_always_inline uword
521 memif_device_input_zc_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
522 memif_if_t *mif, u16 qid,
523 memif_interface_mode_t mode)
525 vnet_main_t *vnm = vnet_get_main ();
526 memif_main_t *mm = &memif_main;
530 uword n_trace = vlib_get_trace_count (vm, node);
531 u32 n_rx_packets = 0, n_rx_bytes = 0;
532 u32 *to_next = 0, *buffers;
533 u32 bi0, bi1, bi2, bi3;
536 vlib_buffer_t *b0, *b1, *b2, *b3;
537 u32 thread_index = vm->thread_index;
538 memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
540 u16 cur_slot, last_slot, ring_size, n_slots, mask, head;
546 mq = vec_elt_at_index (mif->rx_queues, qid);
548 ring_size = 1 << mq->log2_ring_size;
549 mask = ring_size - 1;
551 next_index = (mode == MEMIF_INTERFACE_MODE_IP) ?
552 VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
554 /* asume that somebody will want to add ethernet header on the packet
555 so start with IP header at offset 14 */
556 start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
557 buffer_length = vlib_buffer_get_default_data_size (vm) - start_offset;
559 cur_slot = mq->last_tail;
560 last_slot = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
561 if (cur_slot == last_slot)
563 n_slots = last_slot - cur_slot;
565 /* process ring slots */
566 vec_validate_aligned (ptd->buffers, MEMIF_RX_VECTOR_SZ,
567 CLIB_CACHE_LINE_BYTES);
568 while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
572 s0 = cur_slot & mask;
573 bi0 = mq->buffers[s0];
574 ptd->buffers[n_rx_packets++] = bi0;
576 clib_prefetch_load (&ring->desc[(cur_slot + 8) & mask]);
577 d0 = &ring->desc[s0];
578 hb = b0 = vlib_get_buffer (vm, bi0);
579 b0->current_data = start_offset;
580 b0->current_length = d0->length;
581 n_rx_bytes += d0->length;
585 if (PREDICT_FALSE ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots))
587 hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
588 hb->total_length_not_including_first_buffer = 0;
590 s0 = cur_slot & mask;
591 d0 = &ring->desc[s0];
592 bi0 = mq->buffers[s0];
594 /* previous buffer */
595 b0->next_buffer = bi0;
596 b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
599 b0 = vlib_get_buffer (vm, bi0);
600 b0->current_data = start_offset;
601 b0->current_length = d0->length;
602 hb->total_length_not_including_first_buffer += d0->length;
603 n_rx_bytes += d0->length;
607 if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
612 /* release slots from the ring */
613 mq->last_tail = cur_slot;
615 n_from = n_rx_packets;
616 buffers = ptd->buffers;
621 u32 next0, next1, next2, next3;
623 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
624 while (n_from >= 8 && n_left_to_next >= 4)
626 b0 = vlib_get_buffer (vm, buffers[4]);
627 b1 = vlib_get_buffer (vm, buffers[5]);
628 b2 = vlib_get_buffer (vm, buffers[6]);
629 b3 = vlib_get_buffer (vm, buffers[7]);
630 vlib_prefetch_buffer_header (b0, STORE);
631 vlib_prefetch_buffer_header (b1, STORE);
632 vlib_prefetch_buffer_header (b2, STORE);
633 vlib_prefetch_buffer_header (b3, STORE);
636 to_next[0] = bi0 = buffers[0];
637 to_next[1] = bi1 = buffers[1];
638 to_next[2] = bi2 = buffers[2];
639 to_next[3] = bi3 = buffers[3];
644 b0 = vlib_get_buffer (vm, bi0);
645 b1 = vlib_get_buffer (vm, bi1);
646 b2 = vlib_get_buffer (vm, bi2);
647 b3 = vlib_get_buffer (vm, bi3);
649 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
650 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
651 vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index;
652 vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0;
653 vnet_buffer (b2)->sw_if_index[VLIB_RX] = mif->sw_if_index;
654 vnet_buffer (b2)->sw_if_index[VLIB_TX] = ~0;
655 vnet_buffer (b3)->sw_if_index[VLIB_RX] = mif->sw_if_index;
656 vnet_buffer (b3)->sw_if_index[VLIB_TX] = ~0;
658 if (mode == MEMIF_INTERFACE_MODE_IP)
660 next0 = memif_next_from_ip_hdr (node, b0);
661 next1 = memif_next_from_ip_hdr (node, b1);
662 next2 = memif_next_from_ip_hdr (node, b2);
663 next3 = memif_next_from_ip_hdr (node, b3);
665 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
667 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
669 next0 = mif->per_interface_next_index;
670 next1 = mif->per_interface_next_index;
671 next2 = mif->per_interface_next_index;
672 next3 = mif->per_interface_next_index;
676 next0 = next1 = next2 = next3 = next_index;
677 /* redirect if feature path enabled */
678 vnet_feature_start_device_input_x1 (mif->sw_if_index,
680 vnet_feature_start_device_input_x1 (mif->sw_if_index,
682 vnet_feature_start_device_input_x1 (mif->sw_if_index,
684 vnet_feature_start_device_input_x1 (mif->sw_if_index,
690 if (PREDICT_FALSE (n_trace > 0))
692 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
693 if (PREDICT_FALSE (n_trace > 0))
694 memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace);
695 if (PREDICT_FALSE (n_trace > 0))
696 memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace);
697 if (PREDICT_FALSE (n_trace > 0))
698 memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace);
702 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
703 n_left_to_next, bi0, bi1, bi2, bi3,
704 next0, next1, next2, next3);
709 while (n_from && n_left_to_next)
712 to_next[0] = bi0 = buffers[0];
717 b0 = vlib_get_buffer (vm, bi0);
718 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
719 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
721 if (mode == MEMIF_INTERFACE_MODE_IP)
723 next0 = memif_next_from_ip_hdr (node, b0);
725 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
727 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
728 next0 = mif->per_interface_next_index;
732 /* redirect if feature path enabled */
733 vnet_feature_start_device_input_x1 (mif->sw_if_index,
739 if (PREDICT_FALSE (n_trace > 0))
740 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
743 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
744 n_left_to_next, bi0, next0);
749 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
752 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
753 + VNET_INTERFACE_COUNTER_RX, thread_index,
754 mif->sw_if_index, n_rx_packets,
757 /* refill ring with empty buffers */
759 vec_reset_length (ptd->buffers);
762 n_slots = ring_size - head + mq->last_tail;
770 memif_desc_t desc_template, *dt = &desc_template;
771 clib_memset (dt, 0, sizeof (memif_desc_t));
772 dt->length = buffer_length;
774 n_alloc = vlib_buffer_alloc_to_ring_from_pool (
775 vm, mq->buffers, slot, ring_size, n_slots, mq->buffer_pool_index);
776 dt->region = mq->buffer_pool_index + 1;
777 offset = (u64) mif->regions[dt->region].shm + start_offset;
779 if (PREDICT_FALSE (n_alloc != n_slots))
780 vlib_error_count (vm, node->node_index,
781 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
787 memif_desc_t *d = ring->desc + slot;
788 u32 *bi = mq->buffers + slot;
790 if (PREDICT_FALSE (((slot + 7 > mask) || (n_alloc < 8))))
793 clib_memcpy_fast (d + 0, dt, sizeof (memif_desc_t));
794 clib_memcpy_fast (d + 1, dt, sizeof (memif_desc_t));
795 clib_memcpy_fast (d + 2, dt, sizeof (memif_desc_t));
796 clib_memcpy_fast (d + 3, dt, sizeof (memif_desc_t));
797 clib_memcpy_fast (d + 4, dt, sizeof (memif_desc_t));
798 clib_memcpy_fast (d + 5, dt, sizeof (memif_desc_t));
799 clib_memcpy_fast (d + 6, dt, sizeof (memif_desc_t));
800 clib_memcpy_fast (d + 7, dt, sizeof (memif_desc_t));
802 d[0].offset = (u64) vlib_get_buffer (vm, bi[0])->data - offset;
803 d[1].offset = (u64) vlib_get_buffer (vm, bi[1])->data - offset;
804 d[2].offset = (u64) vlib_get_buffer (vm, bi[2])->data - offset;
805 d[3].offset = (u64) vlib_get_buffer (vm, bi[3])->data - offset;
806 d[4].offset = (u64) vlib_get_buffer (vm, bi[4])->data - offset;
807 d[5].offset = (u64) vlib_get_buffer (vm, bi[5])->data - offset;
808 d[6].offset = (u64) vlib_get_buffer (vm, bi[6])->data - offset;
809 d[7].offset = (u64) vlib_get_buffer (vm, bi[7])->data - offset;
811 slot = (slot + 8) & mask;
816 clib_memcpy_fast (d, dt, sizeof (memif_desc_t));
817 d[0].offset = (u64) vlib_get_buffer (vm, bi[0])->data - offset;
819 slot = (slot + 1) & mask;
823 __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
830 VLIB_NODE_FN (memif_input_node) (vlib_main_t * vm,
831 vlib_node_runtime_t * node,
832 vlib_frame_t * frame)
835 memif_main_t *mm = &memif_main;
836 memif_interface_mode_t mode_ip = MEMIF_INTERFACE_MODE_IP;
837 memif_interface_mode_t mode_eth = MEMIF_INTERFACE_MODE_ETHERNET;
839 vnet_hw_if_rxq_poll_vector_t *pv;
840 pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
841 for (int i = 0; i < vec_len (pv); i++)
845 mif = vec_elt_at_index (mm->interfaces, pv[i].dev_instance);
846 qid = pv[i].queue_id;
847 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) &&
848 (mif->flags & MEMIF_IF_FLAG_CONNECTED))
850 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
852 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
854 memif_device_input_zc_inline (vm, node, mif, qid, mode_ip);
857 memif_device_input_zc_inline (vm, node, mif, qid, mode_eth);
859 else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
861 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
862 n_rx += memif_device_input_inline (
863 vm, node, mif, MEMIF_RING_M2S, qid, mode_ip);
865 n_rx += memif_device_input_inline (
866 vm, node, mif, MEMIF_RING_M2S, qid, mode_eth);
870 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
871 n_rx += memif_device_input_inline (
872 vm, node, mif, MEMIF_RING_S2M, qid, mode_ip);
874 n_rx += memif_device_input_inline (
875 vm, node, mif, MEMIF_RING_S2M, qid, mode_eth);
884 VLIB_REGISTER_NODE (memif_input_node) = {
885 .name = "memif-input",
886 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
887 .sibling_of = "device-input",
888 .format_trace = format_memif_input_trace,
889 .type = VLIB_NODE_TYPE_INPUT,
890 .state = VLIB_NODE_STATE_INTERRUPT,
891 .n_errors = MEMIF_INPUT_N_ERROR,
892 .error_counters = memif_input_error_counters,
899 * fd.io coding-style-patch-verification: ON
902 * eval: (c-set-style "gnu")