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 vl_counter_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;
215 last_slot = (type == MEMIF_RING_S2M) ? ring->head : ring->tail;
216 if (cur_slot == last_slot)
218 n_slots = last_slot - cur_slot;
220 /* construct copy and packet vector out of ring slots */
221 while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
223 u32 dst_off, src_off, n_bytes_left;
227 po = ptd->packet_ops + n_rx_packets;
229 po->first_buffer_vec_index = n_buffers++;
232 dst_off = start_offset;
235 CLIB_PREFETCH (&ring->desc[(cur_slot + 8) & mask],
236 CLIB_CACHE_LINE_BYTES, LOAD);
237 s0 = cur_slot & mask;
238 d0 = &ring->desc[s0];
239 n_bytes_left = d0->length;
241 /* slave resets buffer length,
242 * so it can produce full size buffer for master
244 if (type == MEMIF_RING_M2S)
245 d0->length = mif->run.buffer_size;
247 po->packet_len += n_bytes_left;
248 if (PREDICT_FALSE (last_region != d0->region))
250 last_region_shm = mif->regions[d0->region].shm;
251 last_region = d0->region;
253 last_region_shm + mif->regions[last_region].region_size;
255 mb0 = last_region_shm + d0->offset;
257 if (PREDICT_FALSE (mb0 + n_bytes_left > last_region_max))
258 vlib_error_count (vm, node->node_index, MEMIF_INPUT_ERROR_BAD_DESC, 1);
262 u32 dst_free = buffer_size - dst_off;
266 dst_free = buffer_size;
269 u32 bytes_to_copy = clib_min (dst_free, n_bytes_left);
270 memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off,
272 n_bytes_left -= bytes_to_copy;
273 src_off += bytes_to_copy;
274 dst_off += bytes_to_copy;
276 while (PREDICT_FALSE (n_bytes_left));
280 if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
287 /* allocate free buffers */
288 vec_validate_aligned (ptd->buffers, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
289 n_alloc = vlib_buffer_alloc_from_pool (vm, ptd->buffers, n_buffers,
290 mq->buffer_pool_index);
291 if (PREDICT_FALSE (n_alloc != n_buffers))
294 vlib_buffer_free (vm, ptd->buffers, n_alloc);
295 vlib_error_count (vm, node->node_index,
296 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
301 n_left = vec_len (ptd->copy_ops);
305 CLIB_PREFETCH (co[4].data, CLIB_CACHE_LINE_BYTES, LOAD);
306 CLIB_PREFETCH (co[5].data, CLIB_CACHE_LINE_BYTES, LOAD);
307 CLIB_PREFETCH (co[6].data, CLIB_CACHE_LINE_BYTES, LOAD);
308 CLIB_PREFETCH (co[7].data, CLIB_CACHE_LINE_BYTES, LOAD);
310 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
311 b1 = vlib_get_buffer (vm, ptd->buffers[co[1].buffer_vec_index]);
312 b2 = vlib_get_buffer (vm, ptd->buffers[co[2].buffer_vec_index]);
313 b3 = vlib_get_buffer (vm, ptd->buffers[co[3].buffer_vec_index]);
315 clib_memcpy_fast (b0->data + co[0].buffer_offset, co[0].data,
317 clib_memcpy_fast (b1->data + co[1].buffer_offset, co[1].data,
319 clib_memcpy_fast (b2->data + co[2].buffer_offset, co[2].data,
321 clib_memcpy_fast (b3->data + co[3].buffer_offset, co[3].data,
329 b0 = vlib_get_buffer (vm, ptd->buffers[co[0].buffer_vec_index]);
330 clib_memcpy_fast (b0->data + co[0].buffer_offset, co[0].data,
336 /* release slots from the ring */
337 if (type == MEMIF_RING_S2M)
339 CLIB_MEMORY_STORE_BARRIER ();
340 ring->tail = mq->last_head = cur_slot;
344 mq->last_tail = cur_slot;
347 /* prepare buffer template and next indices */
348 vnet_buffer (&ptd->buffer_template)->sw_if_index[VLIB_RX] =
350 vnet_buffer (&ptd->buffer_template)->feature_arc_index = 0;
351 ptd->buffer_template.current_data = start_offset;
352 ptd->buffer_template.current_config_index = 0;
353 ptd->buffer_template.buffer_pool_index = mq->buffer_pool_index;
354 ptd->buffer_template.ref_count = 1;
356 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
358 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
359 if (mif->per_interface_next_index != ~0)
360 next_index = mif->per_interface_next_index;
362 vnet_feature_start_device_input_x1 (mif->sw_if_index, &next_index,
363 &ptd->buffer_template);
365 vlib_get_new_next_frame (vm, node, next_index, to_next_bufs,
367 if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
369 vlib_next_frame_t *nf;
371 ethernet_input_frame_t *ef;
372 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
373 f = vlib_get_frame (vm, nf->frame);
374 f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
376 ef = vlib_frame_scalar_args (f);
377 ef->sw_if_index = mif->sw_if_index;
378 ef->hw_if_index = mif->hw_if_index;
379 vlib_frame_no_append (f);
383 /* process buffer metadata */
384 u32 n_from = n_rx_packets;
385 po = ptd->packet_ops;
388 /* copy template into local variable - will save per packet load */
389 vlib_buffer_copy_template (&bt, &ptd->buffer_template);
393 b0 = vlib_get_buffer (vm, ptd->buffers[po[0].first_buffer_vec_index]);
394 b1 = vlib_get_buffer (vm, ptd->buffers[po[1].first_buffer_vec_index]);
395 b2 = vlib_get_buffer (vm, ptd->buffers[po[2].first_buffer_vec_index]);
396 b3 = vlib_get_buffer (vm, ptd->buffers[po[3].first_buffer_vec_index]);
398 vlib_prefetch_buffer_header (b0, STORE);
399 vlib_prefetch_buffer_header (b1, STORE);
400 vlib_prefetch_buffer_header (b2, STORE);
401 vlib_prefetch_buffer_header (b3, STORE);
405 fbvi[0] = po[0].first_buffer_vec_index;
406 fbvi[1] = po[1].first_buffer_vec_index;
407 fbvi[2] = po[2].first_buffer_vec_index;
408 fbvi[3] = po[3].first_buffer_vec_index;
410 bi[0] = ptd->buffers[fbvi[0]];
411 bi[1] = ptd->buffers[fbvi[1]];
412 bi[2] = ptd->buffers[fbvi[2]];
413 bi[3] = ptd->buffers[fbvi[3]];
415 b0 = vlib_get_buffer (vm, bi[0]);
416 b1 = vlib_get_buffer (vm, bi[1]);
417 b2 = vlib_get_buffer (vm, bi[2]);
418 b3 = vlib_get_buffer (vm, bi[3]);
420 vlib_buffer_copy_template (b0, &bt);
421 vlib_buffer_copy_template (b1, &bt);
422 vlib_buffer_copy_template (b2, &bt);
423 vlib_buffer_copy_template (b3, &bt);
425 b0->current_length = po[0].packet_len;
426 n_rx_bytes += b0->current_length;
427 b1->current_length = po[1].packet_len;
428 n_rx_bytes += b1->current_length;
429 b2->current_length = po[2].packet_len;
430 n_rx_bytes += b2->current_length;
431 b3->current_length = po[3].packet_len;
432 n_rx_bytes += b3->current_length;
434 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
435 memif_add_to_chain (vm, b1, ptd->buffers + fbvi[1] + 1, buffer_size);
436 memif_add_to_chain (vm, b2, ptd->buffers + fbvi[2] + 1, buffer_size);
437 memif_add_to_chain (vm, b3, ptd->buffers + fbvi[3] + 1, buffer_size);
439 if (mode == MEMIF_INTERFACE_MODE_IP)
441 next[0] = memif_next_from_ip_hdr (node, b0);
442 next[1] = memif_next_from_ip_hdr (node, b1);
443 next[2] = memif_next_from_ip_hdr (node, b2);
444 next[3] = memif_next_from_ip_hdr (node, b3);
457 fbvi[0] = po[0].first_buffer_vec_index;
458 bi[0] = ptd->buffers[fbvi[0]];
459 b0 = vlib_get_buffer (vm, bi[0]);
460 vlib_buffer_copy_template (b0, &bt);
461 b0->current_length = po->packet_len;
462 n_rx_bytes += b0->current_length;
464 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
466 if (mode == MEMIF_INTERFACE_MODE_IP)
468 next[0] = memif_next_from_ip_hdr (node, b0);
478 /* packet trace if enabled */
479 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
481 u32 n_left = n_rx_packets;
485 while (n_trace && n_left)
488 memif_input_trace_t *tr;
489 if (mode != MEMIF_INTERFACE_MODE_ETHERNET)
491 b = vlib_get_buffer (vm, bi[0]);
493 (vlib_trace_buffer (vm, node, ni, b, /* follow_chain */ 0)))
495 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
497 tr->hw_if_index = mif->hw_if_index;
507 vlib_set_trace_count (vm, node, n_trace);
510 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
512 n_left_to_next -= n_rx_packets;
513 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
516 vlib_buffer_enqueue_to_next (vm, node, to_next_bufs, nexts, n_rx_packets);
518 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
519 + VNET_INTERFACE_COUNTER_RX, thread_index,
520 mif->sw_if_index, n_rx_packets,
523 /* refill ring with empty buffers */
525 vec_reset_length (ptd->buffers);
526 vec_reset_length (ptd->copy_ops);
528 if (type == MEMIF_RING_M2S)
530 u16 head = ring->head;
531 n_slots = ring_size - head + mq->last_tail;
535 u16 s = head++ & mask;
536 memif_desc_t *d = &ring->desc[s];
537 d->length = mif->run.buffer_size;
540 CLIB_MEMORY_STORE_BARRIER ();
547 static_always_inline uword
548 memif_device_input_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
549 vlib_frame_t * frame, memif_if_t * mif,
550 u16 qid, memif_interface_mode_t mode)
552 vnet_main_t *vnm = vnet_get_main ();
553 memif_main_t *mm = &memif_main;
557 uword n_trace = vlib_get_trace_count (vm, node);
558 u32 n_rx_packets = 0, n_rx_bytes = 0;
559 u32 *to_next = 0, *buffers;
560 u32 bi0, bi1, bi2, bi3;
562 memif_desc_t *d0, *d1, *d2, *d3;
563 vlib_buffer_t *b0, *b1, *b2, *b3;
564 u32 thread_index = vm->thread_index;
565 memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
567 u16 cur_slot, last_slot, ring_size, n_slots, mask, head;
572 mq = vec_elt_at_index (mif->rx_queues, qid);
574 ring_size = 1 << mq->log2_ring_size;
575 mask = ring_size - 1;
577 next_index = (mode == MEMIF_INTERFACE_MODE_IP) ?
578 VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
580 /* asume that somebody will want to add ethernet header on the packet
581 so start with IP header at offset 14 */
582 start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
583 buffer_length = vlib_buffer_get_default_data_size (vm) - start_offset;
585 cur_slot = mq->last_tail;
586 last_slot = ring->tail;
587 if (cur_slot == last_slot)
589 n_slots = last_slot - cur_slot;
591 /* process ring slots */
592 vec_validate_aligned (ptd->buffers, MEMIF_RX_VECTOR_SZ,
593 CLIB_CACHE_LINE_BYTES);
594 while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
598 s0 = cur_slot & mask;
599 bi0 = mq->buffers[s0];
600 ptd->buffers[n_rx_packets++] = bi0;
602 CLIB_PREFETCH (&ring->desc[(cur_slot + 8) & mask],
603 CLIB_CACHE_LINE_BYTES, LOAD);
604 d0 = &ring->desc[s0];
605 hb = b0 = vlib_get_buffer (vm, bi0);
606 b0->current_data = start_offset;
607 b0->current_length = d0->length;
608 n_rx_bytes += d0->length;
610 if (0 && memif_desc_is_invalid (mif, d0, buffer_length))
615 if (PREDICT_FALSE ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots))
617 hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
619 s0 = cur_slot & mask;
620 d0 = &ring->desc[s0];
621 bi0 = mq->buffers[s0];
623 /* previous buffer */
624 b0->next_buffer = bi0;
625 b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
628 b0 = vlib_get_buffer (vm, bi0);
629 b0->current_data = start_offset;
630 b0->current_length = d0->length;
631 hb->total_length_not_including_first_buffer += d0->length;
632 n_rx_bytes += d0->length;
636 if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
641 /* release slots from the ring */
642 mq->last_tail = cur_slot;
644 n_from = n_rx_packets;
645 buffers = ptd->buffers;
650 u32 next0, next1, next2, next3;
652 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
653 while (n_from >= 8 && n_left_to_next >= 4)
655 b0 = vlib_get_buffer (vm, buffers[4]);
656 b1 = vlib_get_buffer (vm, buffers[5]);
657 b2 = vlib_get_buffer (vm, buffers[6]);
658 b3 = vlib_get_buffer (vm, buffers[7]);
659 vlib_prefetch_buffer_header (b0, STORE);
660 vlib_prefetch_buffer_header (b1, STORE);
661 vlib_prefetch_buffer_header (b2, STORE);
662 vlib_prefetch_buffer_header (b3, STORE);
665 to_next[0] = bi0 = buffers[0];
666 to_next[1] = bi1 = buffers[1];
667 to_next[2] = bi2 = buffers[2];
668 to_next[3] = bi3 = buffers[3];
673 b0 = vlib_get_buffer (vm, bi0);
674 b1 = vlib_get_buffer (vm, bi1);
675 b2 = vlib_get_buffer (vm, bi2);
676 b3 = vlib_get_buffer (vm, bi3);
678 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
679 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
680 vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index;
681 vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0;
682 vnet_buffer (b2)->sw_if_index[VLIB_RX] = mif->sw_if_index;
683 vnet_buffer (b2)->sw_if_index[VLIB_TX] = ~0;
684 vnet_buffer (b3)->sw_if_index[VLIB_RX] = mif->sw_if_index;
685 vnet_buffer (b3)->sw_if_index[VLIB_TX] = ~0;
687 if (mode == MEMIF_INTERFACE_MODE_IP)
689 next0 = memif_next_from_ip_hdr (node, b0);
690 next1 = memif_next_from_ip_hdr (node, b1);
691 next2 = memif_next_from_ip_hdr (node, b2);
692 next3 = memif_next_from_ip_hdr (node, b3);
694 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
696 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
698 next0 = mif->per_interface_next_index;
699 next1 = mif->per_interface_next_index;
700 next2 = mif->per_interface_next_index;
701 next3 = mif->per_interface_next_index;
705 next0 = next1 = next2 = next3 = next_index;
706 /* redirect if feature path enabled */
707 vnet_feature_start_device_input_x1 (mif->sw_if_index,
709 vnet_feature_start_device_input_x1 (mif->sw_if_index,
711 vnet_feature_start_device_input_x1 (mif->sw_if_index,
713 vnet_feature_start_device_input_x1 (mif->sw_if_index,
719 if (PREDICT_FALSE (n_trace > 0))
721 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
722 if (PREDICT_FALSE (n_trace > 0))
723 memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace);
724 if (PREDICT_FALSE (n_trace > 0))
725 memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace);
726 if (PREDICT_FALSE (n_trace > 0))
727 memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace);
731 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
732 n_left_to_next, bi0, bi1, bi2, bi3,
733 next0, next1, next2, next3);
738 while (n_from && n_left_to_next)
741 to_next[0] = bi0 = buffers[0];
746 b0 = vlib_get_buffer (vm, bi0);
747 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
748 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
750 if (mode == MEMIF_INTERFACE_MODE_IP)
752 next0 = memif_next_from_ip_hdr (node, b0);
754 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
756 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
757 next0 = mif->per_interface_next_index;
761 /* redirect if feature path enabled */
762 vnet_feature_start_device_input_x1 (mif->sw_if_index,
768 if (PREDICT_FALSE (n_trace > 0))
769 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
772 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
773 n_left_to_next, bi0, next0);
778 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
781 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
782 + VNET_INTERFACE_COUNTER_RX, thread_index,
783 mif->sw_if_index, n_rx_packets,
786 /* refill ring with empty buffers */
788 vec_reset_length (ptd->buffers);
791 n_slots = ring_size - head + mq->last_tail;
796 memif_desc_t *dt = &ptd->desc_template;
797 clib_memset (dt, 0, sizeof (memif_desc_t));
798 dt->length = buffer_length;
800 n_alloc = vlib_buffer_alloc_to_ring_from_pool (vm, mq->buffers, head & mask,
802 mq->buffer_pool_index);
804 if (PREDICT_FALSE (n_alloc != n_slots))
806 vlib_error_count (vm, node->node_index,
807 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
810 while (n_alloc >= 32)
812 bi0 = mq->buffers[(head + 4) & mask];
813 vlib_prefetch_buffer_with_index (vm, bi0, LOAD);
814 bi1 = mq->buffers[(head + 5) & mask];
815 vlib_prefetch_buffer_with_index (vm, bi1, LOAD);
816 bi2 = mq->buffers[(head + 6) & mask];
817 vlib_prefetch_buffer_with_index (vm, bi2, LOAD);
818 bi3 = mq->buffers[(head + 7) & mask];
819 vlib_prefetch_buffer_with_index (vm, bi3, LOAD);
826 d0 = &ring->desc[s0];
827 d1 = &ring->desc[s1];
828 d2 = &ring->desc[s2];
829 d3 = &ring->desc[s3];
831 clib_memcpy_fast (d0, dt, sizeof (memif_desc_t));
832 clib_memcpy_fast (d1, dt, sizeof (memif_desc_t));
833 clib_memcpy_fast (d2, dt, sizeof (memif_desc_t));
834 clib_memcpy_fast (d3, dt, sizeof (memif_desc_t));
836 b0 = vlib_get_buffer (vm, mq->buffers[s0]);
837 b1 = vlib_get_buffer (vm, mq->buffers[s1]);
838 b2 = vlib_get_buffer (vm, mq->buffers[s2]);
839 b3 = vlib_get_buffer (vm, mq->buffers[s3]);
841 d0->region = b0->buffer_pool_index + 1;
842 d1->region = b1->buffer_pool_index + 1;
843 d2->region = b2->buffer_pool_index + 1;
844 d3->region = b3->buffer_pool_index + 1;
847 (void *) b0->data - mif->regions[d0->region].shm + start_offset;
849 (void *) b1->data - mif->regions[d1->region].shm + start_offset;
851 (void *) b2->data - mif->regions[d2->region].shm + start_offset;
853 (void *) b3->data - mif->regions[d3->region].shm + start_offset;
860 d0 = &ring->desc[s0];
861 clib_memcpy_fast (d0, dt, sizeof (memif_desc_t));
862 b0 = vlib_get_buffer (vm, mq->buffers[s0]);
863 d0->region = b0->buffer_pool_index + 1;
865 (void *) b0->data - mif->regions[d0->region].shm + start_offset;
870 CLIB_MEMORY_STORE_BARRIER ();
878 VLIB_NODE_FN (memif_input_node) (vlib_main_t * vm,
879 vlib_node_runtime_t * node,
880 vlib_frame_t * frame)
883 memif_main_t *mm = &memif_main;
884 memif_interface_mode_t mode_ip = MEMIF_INTERFACE_MODE_IP;
885 memif_interface_mode_t mode_eth = MEMIF_INTERFACE_MODE_ETHERNET;
887 vnet_hw_if_rxq_poll_vector_t *pv;
888 pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
889 for (int i = 0; i < vec_len (pv); i++)
893 mif = vec_elt_at_index (mm->interfaces, pv[i].dev_instance);
894 qid = pv[i].queue_id;
895 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) &&
896 (mif->flags & MEMIF_IF_FLAG_CONNECTED))
898 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
900 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
901 n_rx += memif_device_input_zc_inline (vm, node, frame, mif,
904 n_rx += memif_device_input_zc_inline (vm, node, frame, mif,
907 else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
909 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
910 n_rx += memif_device_input_inline (
911 vm, node, frame, mif, MEMIF_RING_M2S, qid, mode_ip);
913 n_rx += memif_device_input_inline (
914 vm, node, frame, mif, MEMIF_RING_M2S, qid, mode_eth);
918 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
919 n_rx += memif_device_input_inline (
920 vm, node, frame, mif, MEMIF_RING_S2M, qid, mode_ip);
922 n_rx += memif_device_input_inline (
923 vm, node, frame, mif, MEMIF_RING_S2M, qid, mode_eth);
932 VLIB_REGISTER_NODE (memif_input_node) = {
933 .name = "memif-input",
934 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
935 .sibling_of = "device-input",
936 .format_trace = format_memif_input_trace,
937 .type = VLIB_NODE_TYPE_INPUT,
938 .state = VLIB_NODE_STATE_INTERRUPT,
939 .n_errors = MEMIF_INPUT_N_ERROR,
940 .error_counters = memif_input_error_counters,
947 * fd.io coding-style-patch-verification: ON
950 * eval: (c-set-style "gnu")