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 MEMIF_IP_OFFSET 14
35 #define foreach_memif_input_error \
36 _ (BUFFER_ALLOC_FAIL, buffer_alloc, ERROR, "buffer allocation failed") \
37 _ (BAD_DESC, bad_desc, ERROR, "bad descriptor") \
38 _ (NOT_IP, not_ip, INFO, "not ip packet")
42 #define _(f, n, s, d) MEMIF_INPUT_ERROR_##f,
43 foreach_memif_input_error
46 } memif_input_error_t;
48 static vlib_error_desc_t memif_input_error_counters[] = {
49 #define _(f, n, s, d) { #n, d, VL_COUNTER_SEVERITY_##s },
50 foreach_memif_input_error
59 } memif_input_trace_t;
61 static __clib_unused u8 *
62 format_memif_input_trace (u8 * s, va_list * args)
64 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
65 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
66 memif_input_trace_t *t = va_arg (*args, memif_input_trace_t *);
67 u32 indent = format_get_indent (s);
69 s = format (s, "memif: hw_if_index %d next-index %d",
70 t->hw_if_index, t->next_index);
71 s = format (s, "\n%Uslot: ring %u", format_white_space, indent + 2,
76 static_always_inline u32
77 memif_next_from_ip_hdr (vlib_node_runtime_t * node, vlib_buffer_t * b)
79 u8 *ptr = vlib_buffer_get_current (b);
82 if (PREDICT_TRUE (v == 0x40))
83 return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
84 else if (PREDICT_TRUE (v == 0x60))
85 return VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
87 b->error = node->errors[MEMIF_INPUT_ERROR_NOT_IP];
88 return VNET_DEVICE_INPUT_NEXT_DROP;
91 static_always_inline void
92 memif_trace_buffer (vlib_main_t * vm, vlib_node_runtime_t * node,
93 memif_if_t * mif, vlib_buffer_t * b, u32 next, u16 qid,
97 (b != 0 && vlib_trace_buffer (vm, node, next, b, /* follow_chain */ 0)))
99 memif_input_trace_t *tr;
100 vlib_set_trace_count (vm, node, --(*n_tracep));
101 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
102 tr->next_index = next;
103 tr->hw_if_index = mif->hw_if_index;
108 static_always_inline void
109 memif_add_copy_op (memif_per_thread_data_t * ptd, void *data, u32 len,
110 u16 buffer_offset, u16 buffer_vec_index)
113 vec_add2_aligned (ptd->copy_ops, co, 1, CLIB_CACHE_LINE_BYTES);
116 co->buffer_offset = buffer_offset;
117 co->buffer_vec_index = buffer_vec_index;
120 static_always_inline void
121 memif_add_to_chain (vlib_main_t * vm, vlib_buffer_t * b, u32 * buffers,
124 vlib_buffer_t *seg = b;
125 i32 bytes_left = b->current_length - buffer_size + b->current_data;
127 if (PREDICT_TRUE (bytes_left <= 0))
130 b->current_length -= bytes_left;
131 b->total_length_not_including_first_buffer = bytes_left;
135 seg->flags |= VLIB_BUFFER_NEXT_PRESENT;
136 seg->next_buffer = buffers[0];
137 seg = vlib_get_buffer (vm, buffers[0]);
139 seg->current_data = 0;
140 seg->current_length = clib_min (buffer_size, bytes_left);
141 bytes_left -= seg->current_length;
145 static_always_inline u16
146 memif_parse_desc (memif_per_thread_data_t *ptd, memif_if_t *mif,
147 memif_queue_t *mq, u16 next, u16 n_avail)
149 memif_ring_t *ring = mq->ring;
150 memif_desc_t *descs = ring->desc;
151 void **desc_data = ptd->desc_data;
152 u16 *desc_len = ptd->desc_len;
153 memif_desc_status_t *desc_status = ptd->desc_status;
154 u16 n_desc = 0, n_pkts = 0;
156 u16 mask = pow2_mask (mq->log2_ring_size);
163 d = descs + (slot++ & mask);
164 desc_data[i] = (void *) ((u64) d->region << 32 | d->offset);
165 desc_len[i] = d->length;
166 desc_status[i].as_u8 = flags = d->flags;
168 if (PREDICT_FALSE ((flags & MEMIF_DESC_FLAG_NEXT)) == 0)
171 if (++n_pkts == MEMIF_RX_VECTOR_SZ)
178 ptd->n_packets = n_pkts;
182 static_always_inline void
183 memif_desc_status_set_err (memif_desc_status_t *p,
184 memif_desc_status_err_code_t e)
186 memif_desc_status_t s = { .err = 1, .err_code = e };
190 static_always_inline void
191 memif_validate_desc_data (memif_per_thread_data_t *ptd, memif_if_t *mif,
192 u16 n_desc, int is_ethernet)
194 void **desc_data = ptd->desc_data;
195 u16 *desc_len = ptd->desc_len;
196 memif_desc_status_t *desc_status = ptd->desc_status;
197 u16 n_regions = vec_len (mif->regions);
202 for (u32 i = 0; i < n_desc; i++)
204 u16 region = ((u64) desc_data[i]) >> 32;
205 u32 offset = (u64) desc_data[i];
206 u16 len = desc_len[i];
207 memif_region_t *r = mif->regions + region;
209 if (region >= n_regions)
210 memif_desc_status_set_err (desc_status + i,
211 MEMIF_DESC_STATUS_ERR_BAD_REGION);
212 else if (offset + len > r->region_size)
213 memif_desc_status_set_err (desc_status + i,
214 MEMIF_DESC_STATUS_ERR_REGION_OVERRUN);
215 else if (is_ethernet && len > ETHERNET_MAX_PACKET_BYTES)
216 memif_desc_status_set_err (desc_status + i,
217 MEMIF_DESC_STATUS_ERR_DATA_TOO_BIG);
219 memif_desc_status_set_err (desc_status + i,
220 MEMIF_DESC_STATUS_ERR_ZERO_LENGTH);
223 desc_data[i] = r->shm + offset;
226 xor_status |= desc_status[i].as_u8;
231 ptd->max_desc_len = max_len;
232 ptd->xor_status = xor_status;
233 ptd->n_rx_bytes = n_rx_bytes;
236 static_always_inline u32
237 memif_process_desc (vlib_main_t *vm, vlib_node_runtime_t *node,
238 memif_per_thread_data_t *ptd, memif_if_t *mif)
240 u16 buffer_size = vlib_buffer_get_default_data_size (vm);
241 int is_ip = mif->mode == MEMIF_INTERFACE_MODE_IP;
242 i16 start_offset = (is_ip) ? MEMIF_IP_OFFSET : 0;
243 memif_packet_op_t *po = ptd->packet_ops;
244 void **desc_data = ptd->desc_data;
245 u16 *desc_len = ptd->desc_len;
246 memif_desc_status_t *desc_status = ptd->desc_status;
248 u32 n_left = ptd->n_packets;
252 /* construct copy and packet vector out of ring slots */
255 u32 dst_off, src_off, n_bytes_left;
257 po->first_buffer_vec_index = n_buffers++;
261 dst_off = start_offset;
264 i++; /* next descriptor */
265 n_bytes_left = desc_len[i];
267 packet_len += n_bytes_left;
270 if (PREDICT_FALSE (desc_status[i].err))
271 vlib_error_count (vm, node->node_index, MEMIF_INPUT_ERROR_BAD_DESC, 1);
275 u32 dst_free = buffer_size - dst_off;
279 dst_free = buffer_size;
282 u32 bytes_to_copy = clib_min (dst_free, n_bytes_left);
283 memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off,
285 n_bytes_left -= bytes_to_copy;
286 src_off += bytes_to_copy;
287 dst_off += bytes_to_copy;
289 while (PREDICT_FALSE (n_bytes_left));
291 if (desc_status[i].next)
297 /* update packet op */
298 po->packet_len = packet_len;
306 static_always_inline void
307 memif_fill_buffer_mdata_simple (vlib_node_runtime_t *node,
308 memif_per_thread_data_t *ptd,
309 vlib_buffer_t **b, u16 *next, int is_ip)
312 u16 *dl = ptd->desc_len;
313 /* process buffer metadata */
315 u32 n_left = ptd->n_packets;
317 /* copy template into local variable - will save per packet load */
318 vlib_buffer_copy_template (&bt, &ptd->buffer_template);
322 vlib_prefetch_buffer_header (b[4], STORE);
323 vlib_prefetch_buffer_header (b[5], STORE);
324 vlib_prefetch_buffer_header (b[6], STORE);
325 vlib_prefetch_buffer_header (b[7], STORE);
327 vlib_buffer_copy_template (b[0], &bt);
328 vlib_buffer_copy_template (b[1], &bt);
329 vlib_buffer_copy_template (b[2], &bt);
330 vlib_buffer_copy_template (b[3], &bt);
332 b[0]->current_length = dl[0];
333 b[1]->current_length = dl[1];
334 b[2]->current_length = dl[2];
335 b[3]->current_length = dl[3];
339 next[0] = memif_next_from_ip_hdr (node, b[0]);
340 next[1] = memif_next_from_ip_hdr (node, b[1]);
341 next[2] = memif_next_from_ip_hdr (node, b[2]);
342 next[3] = memif_next_from_ip_hdr (node, b[3]);
355 vlib_buffer_copy_template (b[0], &bt);
356 b[0]->current_length = dl[0];
358 next[0] = memif_next_from_ip_hdr (node, b[0]);
368 static_always_inline void
369 memif_fill_buffer_mdata (vlib_main_t *vm, vlib_node_runtime_t *node,
370 memif_per_thread_data_t *ptd, memif_if_t *mif,
371 u32 *bi, u16 *next, int is_ip)
373 u16 buffer_size = vlib_buffer_get_default_data_size (vm);
374 vlib_buffer_t *b0, *b1, *b2, *b3, bt;
375 memif_packet_op_t *po;
376 /* process buffer metadata */
378 u32 n_from = ptd->n_packets;
379 po = ptd->packet_ops;
381 /* copy template into local variable - will save per packet load */
382 vlib_buffer_copy_template (&bt, &ptd->buffer_template);
386 b0 = vlib_get_buffer (vm, ptd->buffers[po[4].first_buffer_vec_index]);
387 b1 = vlib_get_buffer (vm, ptd->buffers[po[5].first_buffer_vec_index]);
388 b2 = vlib_get_buffer (vm, ptd->buffers[po[6].first_buffer_vec_index]);
389 b3 = vlib_get_buffer (vm, ptd->buffers[po[7].first_buffer_vec_index]);
391 vlib_prefetch_buffer_header (b0, STORE);
392 vlib_prefetch_buffer_header (b1, STORE);
393 vlib_prefetch_buffer_header (b2, STORE);
394 vlib_prefetch_buffer_header (b3, STORE);
398 fbvi[0] = po[0].first_buffer_vec_index;
399 fbvi[1] = po[1].first_buffer_vec_index;
400 fbvi[2] = po[2].first_buffer_vec_index;
401 fbvi[3] = po[3].first_buffer_vec_index;
403 bi[0] = ptd->buffers[fbvi[0]];
404 bi[1] = ptd->buffers[fbvi[1]];
405 bi[2] = ptd->buffers[fbvi[2]];
406 bi[3] = ptd->buffers[fbvi[3]];
408 b0 = vlib_get_buffer (vm, bi[0]);
409 b1 = vlib_get_buffer (vm, bi[1]);
410 b2 = vlib_get_buffer (vm, bi[2]);
411 b3 = vlib_get_buffer (vm, bi[3]);
413 vlib_buffer_copy_template (b0, &bt);
414 vlib_buffer_copy_template (b1, &bt);
415 vlib_buffer_copy_template (b2, &bt);
416 vlib_buffer_copy_template (b3, &bt);
418 b0->current_length = po[0].packet_len;
419 b1->current_length = po[1].packet_len;
420 b2->current_length = po[2].packet_len;
421 b3->current_length = po[3].packet_len;
423 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
424 memif_add_to_chain (vm, b1, ptd->buffers + fbvi[1] + 1, buffer_size);
425 memif_add_to_chain (vm, b2, ptd->buffers + fbvi[2] + 1, buffer_size);
426 memif_add_to_chain (vm, b3, ptd->buffers + fbvi[3] + 1, buffer_size);
430 next[0] = memif_next_from_ip_hdr (node, b0);
431 next[1] = memif_next_from_ip_hdr (node, b1);
432 next[2] = memif_next_from_ip_hdr (node, b2);
433 next[3] = memif_next_from_ip_hdr (node, b3);
446 fbvi[0] = po[0].first_buffer_vec_index;
447 bi[0] = ptd->buffers[fbvi[0]];
448 b0 = vlib_get_buffer (vm, bi[0]);
449 vlib_buffer_copy_template (b0, &bt);
450 b0->current_length = po->packet_len;
452 memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
455 next[0] = memif_next_from_ip_hdr (node, b0);
465 static_always_inline uword
466 memif_device_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
467 memif_if_t *mif, memif_ring_type_t type, u16 qid,
468 memif_interface_mode_t mode)
470 vnet_main_t *vnm = vnet_get_main ();
471 memif_main_t *mm = &memif_main;
474 u16 buffer_size = vlib_buffer_get_default_data_size (vm);
476 u16 nexts[MEMIF_RX_VECTOR_SZ], *next = nexts;
477 u32 _to_next_bufs[MEMIF_RX_VECTOR_SZ], *to_next_bufs = _to_next_bufs, *bi;
479 u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
480 vlib_buffer_t *buffer_ptrs[MEMIF_RX_VECTOR_SZ];
481 u32 thread_index = vm->thread_index;
482 memif_per_thread_data_t *ptd =
483 vec_elt_at_index (mm->per_thread_data, thread_index);
484 u16 cur_slot, ring_size, n_slots, mask;
485 u16 n_buffers, n_alloc, n_desc;
488 int is_slave = (mif->flags & MEMIF_IF_FLAG_IS_SLAVE) != 0;
492 mq = vec_elt_at_index (mif->rx_queues, qid);
494 ring_size = 1 << mq->log2_ring_size;
495 mask = ring_size - 1;
497 start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? MEMIF_IP_OFFSET : 0;
501 cur_slot = mq->last_tail;
502 n_slots = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE) - cur_slot;
506 cur_slot = mq->last_head;
507 n_slots = __atomic_load_n (&ring->head, __ATOMIC_ACQUIRE) - cur_slot;
513 n_desc = memif_parse_desc (ptd, mif, mq, cur_slot, n_slots);
515 if (n_desc != ptd->n_packets)
520 if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
521 memif_validate_desc_data (ptd, mif, n_desc, /* is_ethernet */ 1);
523 memif_validate_desc_data (ptd, mif, n_desc, /* is_ethernet */ 0);
525 if (ptd->max_desc_len > buffer_size - start_offset)
528 if (ptd->xor_status != 0)
532 n_buffers = ptd->n_packets;
534 n_buffers = memif_process_desc (vm, node, ptd, mif);
536 /* allocate free buffers */
537 vec_validate_aligned (ptd->buffers, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
538 n_alloc = vlib_buffer_alloc_from_pool (vm, ptd->buffers, n_buffers,
539 mq->buffer_pool_index);
540 if (PREDICT_FALSE (n_alloc != n_buffers))
543 vlib_buffer_free (vm, ptd->buffers, n_alloc);
544 vlib_error_count (vm, node->node_index,
545 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
552 int n_pkts = ptd->n_packets;
553 void **desc_data = ptd->desc_data;
554 u16 *desc_len = ptd->desc_len;
556 vlib_get_buffers (vm, ptd->buffers, buffer_ptrs, n_buffers);
558 for (i = 0; i + 8 < n_pkts; i++)
560 clib_prefetch_load (desc_data[i + 8]);
561 clib_prefetch_store (buffer_ptrs[i + 8]->data);
562 clib_memcpy_fast (buffer_ptrs[i]->data + start_offset, desc_data[i],
565 for (; i < n_pkts; i++)
566 clib_memcpy_fast (buffer_ptrs[i]->data + start_offset, desc_data[i],
572 u32 n_pkts = vec_len (ptd->copy_ops);
575 for (i = 0; i + 8 < n_pkts; i++)
577 clib_prefetch_load (co[i + 8].data);
578 b = vlib_get_buffer (vm, ptd->buffers[co[i].buffer_vec_index]);
579 clib_memcpy_fast (b->data + co[i].buffer_offset, co[i].data,
582 for (; i < n_pkts; i++)
584 b = vlib_get_buffer (vm, ptd->buffers[co[i].buffer_vec_index]);
585 clib_memcpy_fast (b->data + co[i].buffer_offset, co[i].data,
590 /* release slots from the ring */
591 if (type == MEMIF_RING_S2M)
593 __atomic_store_n (&ring->tail, cur_slot, __ATOMIC_RELEASE);
594 mq->last_head = cur_slot;
598 mq->last_tail = cur_slot;
601 /* prepare buffer template and next indices */
602 vnet_buffer (&ptd->buffer_template)->sw_if_index[VLIB_RX] = mif->sw_if_index;
603 vnet_buffer (&ptd->buffer_template)->feature_arc_index = 0;
604 ptd->buffer_template.current_data = start_offset;
605 ptd->buffer_template.current_config_index = 0;
606 ptd->buffer_template.buffer_pool_index = mq->buffer_pool_index;
607 ptd->buffer_template.ref_count = 1;
609 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
611 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
612 if (mif->per_interface_next_index != ~0)
613 next_index = mif->per_interface_next_index;
615 vnet_feature_start_device_input_x1 (mif->sw_if_index, &next_index,
616 &ptd->buffer_template);
618 vlib_get_new_next_frame (vm, node, next_index, to_next_bufs,
620 if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
622 vlib_next_frame_t *nf;
624 ethernet_input_frame_t *ef;
625 nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
626 f = vlib_get_frame (vm, nf->frame);
627 f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
629 ef = vlib_frame_scalar_args (f);
630 ef->sw_if_index = mif->sw_if_index;
631 ef->hw_if_index = mif->hw_if_index;
632 vlib_frame_no_append (f);
638 vlib_buffer_copy_indices (to_next_bufs, ptd->buffers, ptd->n_packets);
639 if (mode == MEMIF_INTERFACE_MODE_IP)
640 memif_fill_buffer_mdata_simple (node, ptd, buffer_ptrs, nexts, 1);
642 memif_fill_buffer_mdata_simple (node, ptd, buffer_ptrs, nexts, 0);
646 if (mode == MEMIF_INTERFACE_MODE_IP)
647 memif_fill_buffer_mdata (vm, node, ptd, mif, to_next_bufs, nexts, 1);
649 memif_fill_buffer_mdata (vm, node, ptd, mif, to_next_bufs, nexts, 0);
652 /* packet trace if enabled */
653 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
655 u32 n_left = ptd->n_packets;
659 while (n_trace && n_left)
662 memif_input_trace_t *tr;
663 if (mode != MEMIF_INTERFACE_MODE_ETHERNET)
665 b = vlib_get_buffer (vm, bi[0]);
667 (vlib_trace_buffer (vm, node, ni, b, /* follow_chain */ 0)))
669 tr = vlib_add_trace (vm, node, b, sizeof (*tr));
671 tr->hw_if_index = mif->hw_if_index;
681 vlib_set_trace_count (vm, node, n_trace);
684 if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
686 n_left_to_next -= ptd->n_packets;
687 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
690 vlib_buffer_enqueue_to_next (vm, node, to_next_bufs, nexts,
693 vlib_increment_combined_counter (
694 vnm->interface_main.combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
695 thread_index, mif->sw_if_index, ptd->n_packets, ptd->n_rx_bytes);
697 /* refill ring with empty buffers */
699 vec_reset_length (ptd->buffers);
700 vec_reset_length (ptd->copy_ops);
702 if (type == MEMIF_RING_M2S)
704 u16 head = ring->head;
705 n_slots = ring_size - head + mq->last_tail;
709 u16 s = head++ & mask;
710 memif_desc_t *d = &ring->desc[s];
711 d->length = mif->run.buffer_size;
714 __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
717 return ptd->n_packets;
720 static_always_inline uword
721 memif_device_input_zc_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
722 memif_if_t *mif, u16 qid,
723 memif_interface_mode_t mode)
725 vnet_main_t *vnm = vnet_get_main ();
726 memif_main_t *mm = &memif_main;
730 uword n_trace = vlib_get_trace_count (vm, node);
731 u32 n_rx_packets = 0, n_rx_bytes = 0;
732 u32 *to_next = 0, *buffers;
733 u32 bi0, bi1, bi2, bi3;
736 vlib_buffer_t *b0, *b1, *b2, *b3;
737 u32 thread_index = vm->thread_index;
738 memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
740 u16 cur_slot, last_slot, ring_size, n_slots, mask, head;
746 mq = vec_elt_at_index (mif->rx_queues, qid);
748 ring_size = 1 << mq->log2_ring_size;
749 mask = ring_size - 1;
751 next_index = (mode == MEMIF_INTERFACE_MODE_IP) ?
752 VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
754 /* asume that somebody will want to add ethernet header on the packet
755 so start with IP header at offset 14 */
756 start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
757 buffer_length = vlib_buffer_get_default_data_size (vm) - start_offset;
759 cur_slot = mq->last_tail;
760 last_slot = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
761 if (cur_slot == last_slot)
763 n_slots = last_slot - cur_slot;
765 /* process ring slots */
766 vec_validate_aligned (ptd->buffers, MEMIF_RX_VECTOR_SZ,
767 CLIB_CACHE_LINE_BYTES);
768 while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
772 s0 = cur_slot & mask;
773 bi0 = mq->buffers[s0];
774 ptd->buffers[n_rx_packets++] = bi0;
776 clib_prefetch_load (&ring->desc[(cur_slot + 8) & mask]);
777 d0 = &ring->desc[s0];
778 hb = b0 = vlib_get_buffer (vm, bi0);
779 b0->current_data = start_offset;
780 b0->current_length = d0->length;
781 n_rx_bytes += d0->length;
785 if (PREDICT_FALSE ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots))
787 hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
788 hb->total_length_not_including_first_buffer = 0;
790 s0 = cur_slot & mask;
791 d0 = &ring->desc[s0];
792 bi0 = mq->buffers[s0];
794 /* previous buffer */
795 b0->next_buffer = bi0;
796 b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
799 b0 = vlib_get_buffer (vm, bi0);
800 b0->current_data = start_offset;
801 b0->current_length = d0->length;
802 hb->total_length_not_including_first_buffer += d0->length;
803 n_rx_bytes += d0->length;
807 if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
812 /* release slots from the ring */
813 mq->last_tail = cur_slot;
815 n_from = n_rx_packets;
816 buffers = ptd->buffers;
821 u32 next0, next1, next2, next3;
823 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
824 while (n_from >= 8 && n_left_to_next >= 4)
826 b0 = vlib_get_buffer (vm, buffers[4]);
827 b1 = vlib_get_buffer (vm, buffers[5]);
828 b2 = vlib_get_buffer (vm, buffers[6]);
829 b3 = vlib_get_buffer (vm, buffers[7]);
830 vlib_prefetch_buffer_header (b0, STORE);
831 vlib_prefetch_buffer_header (b1, STORE);
832 vlib_prefetch_buffer_header (b2, STORE);
833 vlib_prefetch_buffer_header (b3, STORE);
836 to_next[0] = bi0 = buffers[0];
837 to_next[1] = bi1 = buffers[1];
838 to_next[2] = bi2 = buffers[2];
839 to_next[3] = bi3 = buffers[3];
844 b0 = vlib_get_buffer (vm, bi0);
845 b1 = vlib_get_buffer (vm, bi1);
846 b2 = vlib_get_buffer (vm, bi2);
847 b3 = vlib_get_buffer (vm, bi3);
849 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
850 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
851 vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index;
852 vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0;
853 vnet_buffer (b2)->sw_if_index[VLIB_RX] = mif->sw_if_index;
854 vnet_buffer (b2)->sw_if_index[VLIB_TX] = ~0;
855 vnet_buffer (b3)->sw_if_index[VLIB_RX] = mif->sw_if_index;
856 vnet_buffer (b3)->sw_if_index[VLIB_TX] = ~0;
858 if (mode == MEMIF_INTERFACE_MODE_IP)
860 next0 = memif_next_from_ip_hdr (node, b0);
861 next1 = memif_next_from_ip_hdr (node, b1);
862 next2 = memif_next_from_ip_hdr (node, b2);
863 next3 = memif_next_from_ip_hdr (node, b3);
865 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
867 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
869 next0 = mif->per_interface_next_index;
870 next1 = mif->per_interface_next_index;
871 next2 = mif->per_interface_next_index;
872 next3 = mif->per_interface_next_index;
876 next0 = next1 = next2 = next3 = next_index;
877 /* redirect if feature path enabled */
878 vnet_feature_start_device_input_x1 (mif->sw_if_index,
880 vnet_feature_start_device_input_x1 (mif->sw_if_index,
882 vnet_feature_start_device_input_x1 (mif->sw_if_index,
884 vnet_feature_start_device_input_x1 (mif->sw_if_index,
890 if (PREDICT_FALSE (n_trace > 0))
892 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
893 if (PREDICT_FALSE (n_trace > 0))
894 memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace);
895 if (PREDICT_FALSE (n_trace > 0))
896 memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace);
897 if (PREDICT_FALSE (n_trace > 0))
898 memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace);
902 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
903 n_left_to_next, bi0, bi1, bi2, bi3,
904 next0, next1, next2, next3);
909 while (n_from && n_left_to_next)
912 to_next[0] = bi0 = buffers[0];
917 b0 = vlib_get_buffer (vm, bi0);
918 vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
919 vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
921 if (mode == MEMIF_INTERFACE_MODE_IP)
923 next0 = memif_next_from_ip_hdr (node, b0);
925 else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
927 if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
928 next0 = mif->per_interface_next_index;
932 /* redirect if feature path enabled */
933 vnet_feature_start_device_input_x1 (mif->sw_if_index,
939 if (PREDICT_FALSE (n_trace > 0))
940 memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
943 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
944 n_left_to_next, bi0, next0);
949 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
952 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
953 + VNET_INTERFACE_COUNTER_RX, thread_index,
954 mif->sw_if_index, n_rx_packets,
957 /* refill ring with empty buffers */
959 vec_reset_length (ptd->buffers);
962 n_slots = ring_size - head + mq->last_tail;
970 memif_desc_t desc_template, *dt = &desc_template;
971 clib_memset (dt, 0, sizeof (memif_desc_t));
972 dt->length = buffer_length;
974 n_alloc = vlib_buffer_alloc_to_ring_from_pool (
975 vm, mq->buffers, slot, ring_size, n_slots, mq->buffer_pool_index);
976 dt->region = mq->buffer_pool_index + 1;
977 offset = (u64) mif->regions[dt->region].shm - start_offset;
979 if (PREDICT_FALSE (n_alloc != n_slots))
980 vlib_error_count (vm, node->node_index,
981 MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
987 memif_desc_t *d = ring->desc + slot;
988 u32 *bi = mq->buffers + slot;
990 if (PREDICT_FALSE (((slot + 7 > mask) || (n_alloc < 8))))
993 clib_memcpy_fast (d + 0, dt, sizeof (memif_desc_t));
994 clib_memcpy_fast (d + 1, dt, sizeof (memif_desc_t));
995 clib_memcpy_fast (d + 2, dt, sizeof (memif_desc_t));
996 clib_memcpy_fast (d + 3, dt, sizeof (memif_desc_t));
997 clib_memcpy_fast (d + 4, dt, sizeof (memif_desc_t));
998 clib_memcpy_fast (d + 5, dt, sizeof (memif_desc_t));
999 clib_memcpy_fast (d + 6, dt, sizeof (memif_desc_t));
1000 clib_memcpy_fast (d + 7, dt, sizeof (memif_desc_t));
1002 d[0].offset = (u64) vlib_get_buffer (vm, bi[0])->data - offset;
1003 d[1].offset = (u64) vlib_get_buffer (vm, bi[1])->data - offset;
1004 d[2].offset = (u64) vlib_get_buffer (vm, bi[2])->data - offset;
1005 d[3].offset = (u64) vlib_get_buffer (vm, bi[3])->data - offset;
1006 d[4].offset = (u64) vlib_get_buffer (vm, bi[4])->data - offset;
1007 d[5].offset = (u64) vlib_get_buffer (vm, bi[5])->data - offset;
1008 d[6].offset = (u64) vlib_get_buffer (vm, bi[6])->data - offset;
1009 d[7].offset = (u64) vlib_get_buffer (vm, bi[7])->data - offset;
1011 slot = (slot + 8) & mask;
1016 clib_memcpy_fast (d, dt, sizeof (memif_desc_t));
1017 d[0].offset = (u64) vlib_get_buffer (vm, bi[0])->data - offset;
1019 slot = (slot + 1) & mask;
1023 __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
1026 return n_rx_packets;
1030 VLIB_NODE_FN (memif_input_node) (vlib_main_t * vm,
1031 vlib_node_runtime_t * node,
1032 vlib_frame_t * frame)
1035 memif_main_t *mm = &memif_main;
1036 memif_interface_mode_t mode_ip = MEMIF_INTERFACE_MODE_IP;
1037 memif_interface_mode_t mode_eth = MEMIF_INTERFACE_MODE_ETHERNET;
1039 vnet_hw_if_rxq_poll_vector_t *pv;
1040 pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
1041 for (int i = 0; i < vec_len (pv); i++)
1045 mif = vec_elt_at_index (mm->interfaces, pv[i].dev_instance);
1046 qid = pv[i].queue_id;
1047 if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) &&
1048 (mif->flags & MEMIF_IF_FLAG_CONNECTED))
1050 if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
1052 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1054 memif_device_input_zc_inline (vm, node, mif, qid, mode_ip);
1057 memif_device_input_zc_inline (vm, node, mif, qid, mode_eth);
1059 else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
1061 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1062 n_rx += memif_device_input_inline (
1063 vm, node, mif, MEMIF_RING_M2S, qid, mode_ip);
1065 n_rx += memif_device_input_inline (
1066 vm, node, mif, MEMIF_RING_M2S, qid, mode_eth);
1070 if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1071 n_rx += memif_device_input_inline (
1072 vm, node, mif, MEMIF_RING_S2M, qid, mode_ip);
1074 n_rx += memif_device_input_inline (
1075 vm, node, mif, MEMIF_RING_S2M, qid, mode_eth);
1084 VLIB_REGISTER_NODE (memif_input_node) = {
1085 .name = "memif-input",
1086 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1087 .sibling_of = "device-input",
1088 .format_trace = format_memif_input_trace,
1089 .type = VLIB_NODE_TYPE_INPUT,
1090 .state = VLIB_NODE_STATE_INTERRUPT,
1091 .n_errors = MEMIF_INPUT_N_ERROR,
1092 .error_counters = memif_input_error_counters,
1099 * fd.io coding-style-patch-verification: ON
1102 * eval: (c-set-style "gnu")