Line data Source code
1 : /*
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:
7 : *
8 : * http://www.apache.org/licenses/LICENSE-2.0
9 : *
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 : *------------------------------------------------------------------
16 : */
17 :
18 : #define _GNU_SOURCE
19 : #include <stdint.h>
20 : #include <net/if.h>
21 : #include <sys/ioctl.h>
22 : #include <sys/uio.h>
23 :
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>
29 :
30 : #include <memif/memif.h>
31 : #include <memif/private.h>
32 :
33 : #define MEMIF_IP_OFFSET 14
34 :
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")
39 :
40 : typedef enum
41 : {
42 : #define _(f, n, s, d) MEMIF_INPUT_ERROR_##f,
43 : foreach_memif_input_error
44 : #undef _
45 : MEMIF_INPUT_N_ERROR,
46 : } memif_input_error_t;
47 :
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
51 : #undef _
52 : };
53 :
54 : typedef struct
55 : {
56 : u32 next_index;
57 : u32 hw_if_index;
58 : u16 ring;
59 : } memif_input_trace_t;
60 :
61 : static __clib_unused u8 *
62 0 : format_memif_input_trace (u8 * s, va_list * args)
63 : {
64 0 : CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
65 0 : CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
66 0 : memif_input_trace_t *t = va_arg (*args, memif_input_trace_t *);
67 0 : u32 indent = format_get_indent (s);
68 :
69 0 : s = format (s, "memif: hw_if_index %d next-index %d",
70 : t->hw_if_index, t->next_index);
71 0 : s = format (s, "\n%Uslot: ring %u", format_white_space, indent + 2,
72 0 : t->ring);
73 0 : return s;
74 : }
75 :
76 : static_always_inline u32
77 0 : memif_next_from_ip_hdr (vlib_node_runtime_t * node, vlib_buffer_t * b)
78 : {
79 0 : u8 *ptr = vlib_buffer_get_current (b);
80 0 : u8 v = *ptr & 0xf0;
81 :
82 0 : if (PREDICT_TRUE (v == 0x40))
83 0 : return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
84 0 : else if (PREDICT_TRUE (v == 0x60))
85 0 : return VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
86 :
87 0 : b->error = node->errors[MEMIF_INPUT_ERROR_NOT_IP];
88 0 : return VNET_DEVICE_INPUT_NEXT_DROP;
89 : }
90 :
91 : static_always_inline void
92 0 : 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,
94 : uword * n_tracep)
95 : {
96 0 : if (PREDICT_TRUE
97 : (b != 0 && vlib_trace_buffer (vm, node, next, b, /* follow_chain */ 0)))
98 : {
99 : memif_input_trace_t *tr;
100 0 : vlib_set_trace_count (vm, node, --(*n_tracep));
101 0 : tr = vlib_add_trace (vm, node, b, sizeof (*tr));
102 0 : tr->next_index = next;
103 0 : tr->hw_if_index = mif->hw_if_index;
104 0 : tr->ring = qid;
105 : }
106 0 : }
107 :
108 : static_always_inline void
109 0 : memif_add_copy_op (memif_per_thread_data_t * ptd, void *data, u32 len,
110 : u16 buffer_offset, u16 buffer_vec_index)
111 : {
112 : memif_copy_op_t *co;
113 0 : vec_add2_aligned (ptd->copy_ops, co, 1, CLIB_CACHE_LINE_BYTES);
114 0 : co->data = data;
115 0 : co->data_len = len;
116 0 : co->buffer_offset = buffer_offset;
117 0 : co->buffer_vec_index = buffer_vec_index;
118 0 : }
119 :
120 : static_always_inline void
121 0 : memif_add_to_chain (vlib_main_t * vm, vlib_buffer_t * b, u32 * buffers,
122 : u32 buffer_size)
123 : {
124 0 : vlib_buffer_t *seg = b;
125 0 : i32 bytes_left = b->current_length - buffer_size + b->current_data;
126 :
127 0 : if (PREDICT_TRUE (bytes_left <= 0))
128 0 : return;
129 :
130 0 : b->current_length -= bytes_left;
131 0 : b->total_length_not_including_first_buffer = bytes_left;
132 :
133 0 : while (bytes_left)
134 : {
135 0 : seg->flags |= VLIB_BUFFER_NEXT_PRESENT;
136 0 : seg->next_buffer = buffers[0];
137 0 : seg = vlib_get_buffer (vm, buffers[0]);
138 0 : buffers++;
139 0 : seg->current_data = 0;
140 0 : seg->current_length = clib_min (buffer_size, bytes_left);
141 0 : bytes_left -= seg->current_length;
142 : }
143 : }
144 :
145 : static_always_inline u16
146 11 : memif_parse_desc (memif_per_thread_data_t *ptd, memif_if_t *mif,
147 : memif_queue_t *mq, u16 next, u16 n_avail)
148 : {
149 11 : memif_ring_t *ring = mq->ring;
150 11 : memif_desc_t *descs = ring->desc;
151 11 : void **desc_data = ptd->desc_data;
152 11 : u16 *desc_len = ptd->desc_len;
153 11 : memif_desc_status_t *desc_status = ptd->desc_status;
154 11 : u16 n_desc = 0, n_pkts = 0;
155 11 : u32 i = 0;
156 11 : u16 mask = pow2_mask (mq->log2_ring_size);
157 11 : memif_desc_t *d = 0;
158 11 : u32 slot = next;
159 :
160 22 : while (i < n_avail)
161 : {
162 : u8 flags;
163 11 : d = descs + (slot++ & mask);
164 11 : desc_data[i] = (void *) ((u64) d->region << 32 | d->offset);
165 11 : desc_len[i] = d->length;
166 11 : desc_status[i].as_u8 = flags = d->flags;
167 11 : i++;
168 11 : if (PREDICT_FALSE ((flags & MEMIF_DESC_FLAG_NEXT)) == 0)
169 : {
170 11 : n_desc = i;
171 11 : if (++n_pkts == MEMIF_RX_VECTOR_SZ)
172 0 : goto frame_full;
173 : }
174 : }
175 11 : frame_full:
176 :
177 : /* done */
178 11 : ptd->n_packets = n_pkts;
179 11 : return n_desc;
180 : }
181 :
182 : static_always_inline void
183 0 : memif_desc_status_set_err (memif_desc_status_t *p,
184 : memif_desc_status_err_code_t e)
185 : {
186 0 : memif_desc_status_t s = { .err = 1, .err_code = e };
187 0 : p->as_u8 |= s.as_u8;
188 0 : }
189 :
190 : static_always_inline void
191 11 : memif_validate_desc_data (memif_per_thread_data_t *ptd, memif_if_t *mif,
192 : u16 n_desc, int is_ethernet)
193 : {
194 11 : void **desc_data = ptd->desc_data;
195 11 : u16 *desc_len = ptd->desc_len;
196 11 : memif_desc_status_t *desc_status = ptd->desc_status;
197 11 : u16 n_regions = vec_len (mif->regions);
198 11 : u32 n_rx_bytes = 0;
199 11 : u16 max_len = 0;
200 11 : u8 xor_status = 0;
201 :
202 22 : for (u32 i = 0; i < n_desc; i++)
203 : {
204 11 : u16 region = ((u64) desc_data[i]) >> 32;
205 11 : u32 offset = (u64) desc_data[i];
206 11 : u16 len = desc_len[i];
207 11 : memif_region_t *r = mif->regions + region;
208 :
209 11 : if (region >= n_regions)
210 0 : memif_desc_status_set_err (desc_status + i,
211 : MEMIF_DESC_STATUS_ERR_BAD_REGION);
212 11 : else if (offset + len > r->region_size)
213 0 : memif_desc_status_set_err (desc_status + i,
214 : MEMIF_DESC_STATUS_ERR_REGION_OVERRUN);
215 11 : else if (is_ethernet && len > ETHERNET_MAX_PACKET_BYTES)
216 0 : memif_desc_status_set_err (desc_status + i,
217 : MEMIF_DESC_STATUS_ERR_DATA_TOO_BIG);
218 11 : else if (len == 0)
219 0 : memif_desc_status_set_err (desc_status + i,
220 : MEMIF_DESC_STATUS_ERR_ZERO_LENGTH);
221 : else
222 : {
223 11 : desc_data[i] = r->shm + offset;
224 11 : if (len > max_len)
225 11 : max_len = len;
226 11 : n_rx_bytes += len;
227 : }
228 11 : xor_status |= desc_status[i].as_u8;
229 : }
230 :
231 11 : ptd->max_desc_len = max_len;
232 11 : ptd->xor_status = xor_status;
233 11 : ptd->n_rx_bytes = n_rx_bytes;
234 11 : }
235 :
236 : static_always_inline u32
237 0 : memif_process_desc (vlib_main_t *vm, vlib_node_runtime_t *node,
238 : memif_per_thread_data_t *ptd, memif_if_t *mif)
239 : {
240 0 : u16 buffer_size = vlib_buffer_get_default_data_size (vm);
241 0 : int is_ip = mif->mode == MEMIF_INTERFACE_MODE_IP;
242 0 : i16 start_offset = (is_ip) ? MEMIF_IP_OFFSET : 0;
243 0 : memif_packet_op_t *po = ptd->packet_ops;
244 0 : void **desc_data = ptd->desc_data;
245 0 : u16 *desc_len = ptd->desc_len;
246 0 : memif_desc_status_t *desc_status = ptd->desc_status;
247 0 : u32 n_buffers = 0;
248 0 : u32 n_left = ptd->n_packets;
249 : u32 packet_len;
250 0 : int i = -1;
251 0 : int bad_packets = 0;
252 :
253 : /* construct copy and packet vector out of ring slots */
254 0 : while (n_left)
255 : {
256 : u32 dst_off, src_off, n_bytes_left;
257 : void *mb0;
258 0 : po->first_buffer_vec_index = n_buffers++;
259 :
260 0 : packet_len = 0;
261 0 : src_off = 0;
262 0 : dst_off = start_offset;
263 :
264 0 : next_slot:
265 0 : i++; /* next descriptor */
266 0 : n_bytes_left = desc_len[i];
267 :
268 0 : packet_len += n_bytes_left;
269 0 : mb0 = desc_data[i];
270 :
271 0 : if (PREDICT_FALSE (desc_status[i].err))
272 : {
273 0 : vlib_error_count (vm, node->node_index, MEMIF_INPUT_ERROR_BAD_DESC,
274 : 1);
275 0 : bad_packets++;
276 0 : ASSERT (n_buffers > 0);
277 0 : n_buffers--;
278 0 : goto next_packet;
279 : }
280 : else
281 : do
282 : {
283 0 : u32 dst_free = buffer_size - dst_off;
284 0 : if (dst_free == 0)
285 : {
286 0 : dst_off = 0;
287 0 : dst_free = buffer_size;
288 0 : n_buffers++;
289 : }
290 0 : u32 bytes_to_copy = clib_min (dst_free, n_bytes_left);
291 0 : memif_add_copy_op (ptd, mb0 + src_off, bytes_to_copy, dst_off,
292 0 : n_buffers - 1);
293 0 : n_bytes_left -= bytes_to_copy;
294 0 : src_off += bytes_to_copy;
295 0 : dst_off += bytes_to_copy;
296 : }
297 0 : while (PREDICT_FALSE (n_bytes_left));
298 :
299 0 : if (desc_status[i].next)
300 : {
301 0 : src_off = 0;
302 0 : goto next_slot;
303 : }
304 :
305 : /* update packet op */
306 0 : po->packet_len = packet_len;
307 0 : po++;
308 :
309 0 : next_packet:
310 : /* next packet */
311 0 : n_left--;
312 : }
313 0 : ASSERT (ptd->n_packets >= bad_packets);
314 0 : ptd->n_packets -= bad_packets;
315 0 : return n_buffers;
316 : }
317 : static_always_inline void
318 11 : memif_fill_buffer_mdata_simple (vlib_node_runtime_t *node,
319 : memif_per_thread_data_t *ptd,
320 : vlib_buffer_t **b, u16 *next, int is_ip)
321 : {
322 : vlib_buffer_t bt;
323 11 : u16 *dl = ptd->desc_len;
324 : /* process buffer metadata */
325 :
326 11 : u32 n_left = ptd->n_packets;
327 :
328 : /* copy template into local variable - will save per packet load */
329 11 : vlib_buffer_copy_template (&bt, &ptd->buffer_template);
330 :
331 11 : while (n_left >= 8)
332 : {
333 0 : vlib_prefetch_buffer_header (b[4], STORE);
334 0 : vlib_prefetch_buffer_header (b[5], STORE);
335 0 : vlib_prefetch_buffer_header (b[6], STORE);
336 0 : vlib_prefetch_buffer_header (b[7], STORE);
337 :
338 0 : vlib_buffer_copy_template (b[0], &bt);
339 0 : vlib_buffer_copy_template (b[1], &bt);
340 0 : vlib_buffer_copy_template (b[2], &bt);
341 0 : vlib_buffer_copy_template (b[3], &bt);
342 :
343 0 : b[0]->current_length = dl[0];
344 0 : b[1]->current_length = dl[1];
345 0 : b[2]->current_length = dl[2];
346 0 : b[3]->current_length = dl[3];
347 :
348 0 : if (is_ip)
349 : {
350 0 : next[0] = memif_next_from_ip_hdr (node, b[0]);
351 0 : next[1] = memif_next_from_ip_hdr (node, b[1]);
352 0 : next[2] = memif_next_from_ip_hdr (node, b[2]);
353 0 : next[3] = memif_next_from_ip_hdr (node, b[3]);
354 : }
355 :
356 : /* next */
357 0 : n_left -= 4;
358 0 : b += 4;
359 0 : dl += 4;
360 0 : next += 4;
361 : }
362 :
363 22 : while (n_left)
364 : {
365 : /* enqueue buffer */
366 11 : vlib_buffer_copy_template (b[0], &bt);
367 11 : b[0]->current_length = dl[0];
368 11 : if (is_ip)
369 0 : next[0] = memif_next_from_ip_hdr (node, b[0]);
370 :
371 : /* next */
372 11 : n_left -= 1;
373 11 : b += 1;
374 11 : dl += 1;
375 11 : next += 1;
376 : }
377 11 : }
378 :
379 : static_always_inline void
380 0 : memif_fill_buffer_mdata (vlib_main_t *vm, vlib_node_runtime_t *node,
381 : memif_per_thread_data_t *ptd, memif_if_t *mif,
382 : u32 *bi, u16 *next, int is_ip)
383 : {
384 0 : u16 buffer_size = vlib_buffer_get_default_data_size (vm);
385 : vlib_buffer_t *b0, *b1, *b2, *b3, bt;
386 : memif_packet_op_t *po;
387 : /* process buffer metadata */
388 :
389 0 : u32 n_from = ptd->n_packets;
390 0 : po = ptd->packet_ops;
391 :
392 : /* copy template into local variable - will save per packet load */
393 0 : vlib_buffer_copy_template (&bt, &ptd->buffer_template);
394 :
395 0 : while (n_from >= 8)
396 : {
397 0 : b0 = vlib_get_buffer (vm, ptd->buffers[po[4].first_buffer_vec_index]);
398 0 : b1 = vlib_get_buffer (vm, ptd->buffers[po[5].first_buffer_vec_index]);
399 0 : b2 = vlib_get_buffer (vm, ptd->buffers[po[6].first_buffer_vec_index]);
400 0 : b3 = vlib_get_buffer (vm, ptd->buffers[po[7].first_buffer_vec_index]);
401 :
402 0 : vlib_prefetch_buffer_header (b0, STORE);
403 0 : vlib_prefetch_buffer_header (b1, STORE);
404 0 : vlib_prefetch_buffer_header (b2, STORE);
405 0 : vlib_prefetch_buffer_header (b3, STORE);
406 :
407 : /* enqueue buffer */
408 : u32 fbvi[4];
409 0 : fbvi[0] = po[0].first_buffer_vec_index;
410 0 : fbvi[1] = po[1].first_buffer_vec_index;
411 0 : fbvi[2] = po[2].first_buffer_vec_index;
412 0 : fbvi[3] = po[3].first_buffer_vec_index;
413 :
414 0 : bi[0] = ptd->buffers[fbvi[0]];
415 0 : bi[1] = ptd->buffers[fbvi[1]];
416 0 : bi[2] = ptd->buffers[fbvi[2]];
417 0 : bi[3] = ptd->buffers[fbvi[3]];
418 :
419 0 : b0 = vlib_get_buffer (vm, bi[0]);
420 0 : b1 = vlib_get_buffer (vm, bi[1]);
421 0 : b2 = vlib_get_buffer (vm, bi[2]);
422 0 : b3 = vlib_get_buffer (vm, bi[3]);
423 :
424 0 : vlib_buffer_copy_template (b0, &bt);
425 0 : vlib_buffer_copy_template (b1, &bt);
426 0 : vlib_buffer_copy_template (b2, &bt);
427 0 : vlib_buffer_copy_template (b3, &bt);
428 :
429 0 : b0->current_length = po[0].packet_len;
430 0 : b1->current_length = po[1].packet_len;
431 0 : b2->current_length = po[2].packet_len;
432 0 : b3->current_length = po[3].packet_len;
433 :
434 0 : memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
435 0 : memif_add_to_chain (vm, b1, ptd->buffers + fbvi[1] + 1, buffer_size);
436 0 : memif_add_to_chain (vm, b2, ptd->buffers + fbvi[2] + 1, buffer_size);
437 0 : memif_add_to_chain (vm, b3, ptd->buffers + fbvi[3] + 1, buffer_size);
438 :
439 0 : if (is_ip)
440 : {
441 0 : next[0] = memif_next_from_ip_hdr (node, b0);
442 0 : next[1] = memif_next_from_ip_hdr (node, b1);
443 0 : next[2] = memif_next_from_ip_hdr (node, b2);
444 0 : next[3] = memif_next_from_ip_hdr (node, b3);
445 : }
446 :
447 : /* next */
448 0 : n_from -= 4;
449 0 : po += 4;
450 0 : bi += 4;
451 0 : next += 4;
452 : }
453 0 : while (n_from)
454 : {
455 : u32 fbvi[1];
456 : /* enqueue buffer */
457 0 : fbvi[0] = po[0].first_buffer_vec_index;
458 0 : bi[0] = ptd->buffers[fbvi[0]];
459 0 : b0 = vlib_get_buffer (vm, bi[0]);
460 0 : vlib_buffer_copy_template (b0, &bt);
461 0 : b0->current_length = po->packet_len;
462 :
463 0 : memif_add_to_chain (vm, b0, ptd->buffers + fbvi[0] + 1, buffer_size);
464 :
465 0 : if (is_ip)
466 0 : next[0] = memif_next_from_ip_hdr (node, b0);
467 :
468 : /* next */
469 0 : n_from -= 1;
470 0 : po += 1;
471 0 : bi += 1;
472 0 : next += 1;
473 : }
474 0 : }
475 :
476 : static_always_inline void
477 11 : memif_advance_ring (memif_ring_type_t type, memif_queue_t *mq,
478 : memif_ring_t *ring, u16 cur_slot)
479 : {
480 11 : if (type == MEMIF_RING_S2M)
481 : {
482 11 : __atomic_store_n (&ring->tail, cur_slot, __ATOMIC_RELEASE);
483 11 : mq->last_head = cur_slot;
484 : }
485 : else
486 : {
487 0 : mq->last_tail = cur_slot;
488 : }
489 11 : }
490 :
491 : static_always_inline uword
492 8605830 : memif_device_input_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
493 : memif_if_t *mif, memif_ring_type_t type, u16 qid,
494 : memif_interface_mode_t mode)
495 : {
496 8605830 : vnet_main_t *vnm = vnet_get_main ();
497 8605830 : memif_main_t *mm = &memif_main;
498 : memif_ring_t *ring;
499 : memif_queue_t *mq;
500 8605830 : u16 buffer_size = vlib_buffer_get_default_data_size (vm);
501 : uword n_trace;
502 8605830 : u16 nexts[MEMIF_RX_VECTOR_SZ], *next = nexts;
503 8605830 : u32 _to_next_bufs[MEMIF_RX_VECTOR_SZ], *to_next_bufs = _to_next_bufs, *bi;
504 : u32 n_left_to_next;
505 8605830 : u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
506 : vlib_buffer_t *buffer_ptrs[MEMIF_RX_VECTOR_SZ];
507 8605830 : u32 thread_index = vm->thread_index;
508 8605830 : memif_per_thread_data_t *ptd =
509 8605830 : vec_elt_at_index (mm->per_thread_data, thread_index);
510 : u16 cur_slot, ring_size, n_slots, mask;
511 : u16 n_buffers, n_alloc, n_desc;
512 : i16 start_offset;
513 : memif_copy_op_t *co;
514 8605830 : int is_slave = (mif->flags & MEMIF_IF_FLAG_IS_SLAVE) != 0;
515 8605830 : int is_simple = 1;
516 : int i;
517 :
518 8605830 : mq = vec_elt_at_index (mif->rx_queues, qid);
519 8605830 : ring = mq->ring;
520 8605830 : ring_size = 1 << mq->log2_ring_size;
521 8605830 : mask = ring_size - 1;
522 :
523 8605830 : start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? MEMIF_IP_OFFSET : 0;
524 :
525 8605830 : if (is_slave)
526 : {
527 0 : cur_slot = mq->last_tail;
528 0 : n_slots = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE) - cur_slot;
529 : }
530 : else
531 : {
532 8605830 : cur_slot = mq->last_head;
533 8605830 : n_slots = __atomic_load_n (&ring->head, __ATOMIC_ACQUIRE) - cur_slot;
534 : }
535 :
536 8605830 : if (n_slots == 0)
537 : {
538 8605820 : ptd->n_packets = 0;
539 8605820 : goto refill;
540 : }
541 :
542 11 : n_desc = memif_parse_desc (ptd, mif, mq, cur_slot, n_slots);
543 :
544 11 : if (n_desc != ptd->n_packets)
545 0 : is_simple = 0;
546 :
547 11 : cur_slot += n_desc;
548 :
549 11 : if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
550 11 : memif_validate_desc_data (ptd, mif, n_desc, /* is_ethernet */ 1);
551 : else
552 0 : memif_validate_desc_data (ptd, mif, n_desc, /* is_ethernet */ 0);
553 :
554 11 : if (ptd->max_desc_len > buffer_size - start_offset)
555 0 : is_simple = 0;
556 :
557 11 : if (ptd->xor_status != 0)
558 0 : is_simple = 0;
559 :
560 11 : if (is_simple)
561 11 : n_buffers = ptd->n_packets;
562 : else
563 0 : n_buffers = memif_process_desc (vm, node, ptd, mif);
564 :
565 11 : if (PREDICT_FALSE (n_buffers == 0))
566 : {
567 : /* All descriptors are bad. Release slots in the ring and bail */
568 0 : memif_advance_ring (type, mq, ring, cur_slot);
569 0 : goto refill;
570 : }
571 :
572 : /* allocate free buffers */
573 11 : vec_validate_aligned (ptd->buffers, n_buffers - 1, CLIB_CACHE_LINE_BYTES);
574 22 : n_alloc = vlib_buffer_alloc_from_pool (vm, ptd->buffers, n_buffers,
575 11 : mq->buffer_pool_index);
576 11 : if (PREDICT_FALSE (n_alloc != n_buffers))
577 : {
578 0 : if (n_alloc)
579 0 : vlib_buffer_free (vm, ptd->buffers, n_alloc);
580 0 : vlib_error_count (vm, node->node_index,
581 : MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
582 0 : goto refill;
583 : }
584 :
585 : /* copy data */
586 11 : if (is_simple)
587 : {
588 11 : int n_pkts = ptd->n_packets;
589 11 : void **desc_data = ptd->desc_data;
590 11 : u16 *desc_len = ptd->desc_len;
591 :
592 11 : vlib_get_buffers (vm, ptd->buffers, buffer_ptrs, n_buffers);
593 :
594 11 : for (i = 0; i + 8 < n_pkts; i++)
595 : {
596 0 : clib_prefetch_load (desc_data[i + 8]);
597 0 : clib_prefetch_store (buffer_ptrs[i + 8]->data);
598 0 : clib_memcpy_fast (buffer_ptrs[i]->data + start_offset, desc_data[i],
599 0 : desc_len[i]);
600 : }
601 22 : for (; i < n_pkts; i++)
602 11 : clib_memcpy_fast (buffer_ptrs[i]->data + start_offset, desc_data[i],
603 11 : desc_len[i]);
604 : }
605 : else
606 : {
607 : vlib_buffer_t *b;
608 0 : u32 n_pkts = vec_len (ptd->copy_ops);
609 0 : co = ptd->copy_ops;
610 :
611 0 : for (i = 0; i + 8 < n_pkts; i++)
612 : {
613 0 : clib_prefetch_load (co[i + 8].data);
614 0 : b = vlib_get_buffer (vm, ptd->buffers[co[i].buffer_vec_index]);
615 0 : clib_memcpy_fast (b->data + co[i].buffer_offset, co[i].data,
616 0 : co[i].data_len);
617 : }
618 0 : for (; i < n_pkts; i++)
619 : {
620 0 : b = vlib_get_buffer (vm, ptd->buffers[co[i].buffer_vec_index]);
621 0 : clib_memcpy_fast (b->data + co[i].buffer_offset, co[i].data,
622 0 : co[i].data_len);
623 : }
624 : }
625 :
626 : /* release slots from the ring */
627 11 : memif_advance_ring (type, mq, ring, cur_slot);
628 :
629 : /* prepare buffer template and next indices */
630 11 : vnet_buffer (&ptd->buffer_template)->sw_if_index[VLIB_RX] = mif->sw_if_index;
631 11 : vnet_buffer (&ptd->buffer_template)->feature_arc_index = 0;
632 11 : ptd->buffer_template.current_data = start_offset;
633 11 : ptd->buffer_template.current_config_index = 0;
634 11 : ptd->buffer_template.buffer_pool_index = mq->buffer_pool_index;
635 11 : ptd->buffer_template.ref_count = 1;
636 :
637 11 : if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
638 : {
639 11 : next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
640 11 : if (mif->per_interface_next_index != ~0)
641 0 : next_index = mif->per_interface_next_index;
642 : else
643 11 : vnet_feature_start_device_input_x1 (mif->sw_if_index, &next_index,
644 : &ptd->buffer_template);
645 :
646 11 : vlib_get_new_next_frame (vm, node, next_index, to_next_bufs,
647 : n_left_to_next);
648 11 : if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
649 : {
650 : vlib_next_frame_t *nf;
651 : vlib_frame_t *f;
652 : ethernet_input_frame_t *ef;
653 0 : nf = vlib_node_runtime_get_next_frame (vm, node, next_index);
654 0 : f = vlib_get_frame (vm, nf->frame);
655 0 : f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
656 :
657 0 : ef = vlib_frame_scalar_args (f);
658 0 : ef->sw_if_index = mif->sw_if_index;
659 0 : ef->hw_if_index = mif->hw_if_index;
660 0 : vlib_frame_no_append (f);
661 : }
662 : }
663 :
664 11 : if (is_simple)
665 : {
666 11 : vlib_buffer_copy_indices (to_next_bufs, ptd->buffers, ptd->n_packets);
667 11 : if (mode == MEMIF_INTERFACE_MODE_IP)
668 0 : memif_fill_buffer_mdata_simple (node, ptd, buffer_ptrs, nexts, 1);
669 : else
670 11 : memif_fill_buffer_mdata_simple (node, ptd, buffer_ptrs, nexts, 0);
671 : }
672 : else
673 : {
674 0 : if (mode == MEMIF_INTERFACE_MODE_IP)
675 0 : memif_fill_buffer_mdata (vm, node, ptd, mif, to_next_bufs, nexts, 1);
676 : else
677 0 : memif_fill_buffer_mdata (vm, node, ptd, mif, to_next_bufs, nexts, 0);
678 : }
679 :
680 : /* packet trace if enabled */
681 11 : if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
682 : {
683 0 : u32 n_left = ptd->n_packets;
684 0 : bi = to_next_bufs;
685 0 : next = nexts;
686 0 : u32 ni = next_index;
687 0 : while (n_trace && n_left)
688 : {
689 : vlib_buffer_t *b;
690 : memif_input_trace_t *tr;
691 0 : if (mode != MEMIF_INTERFACE_MODE_ETHERNET)
692 0 : ni = next[0];
693 0 : b = vlib_get_buffer (vm, bi[0]);
694 0 : if (PREDICT_TRUE
695 : (vlib_trace_buffer (vm, node, ni, b, /* follow_chain */ 0)))
696 : {
697 0 : tr = vlib_add_trace (vm, node, b, sizeof (*tr));
698 0 : tr->next_index = ni;
699 0 : tr->hw_if_index = mif->hw_if_index;
700 0 : tr->ring = qid;
701 0 : n_trace--;
702 : }
703 :
704 : /* next */
705 0 : n_left--;
706 0 : bi++;
707 0 : next++;
708 : }
709 0 : vlib_set_trace_count (vm, node, n_trace);
710 : }
711 :
712 11 : if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
713 : {
714 11 : n_left_to_next -= ptd->n_packets;
715 11 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
716 : }
717 : else
718 0 : vlib_buffer_enqueue_to_next (vm, node, to_next_bufs, nexts,
719 0 : ptd->n_packets);
720 :
721 11 : vlib_increment_combined_counter (
722 : vnm->interface_main.combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
723 11 : thread_index, mif->sw_if_index, ptd->n_packets, ptd->n_rx_bytes);
724 :
725 : /* refill ring with empty buffers */
726 8605830 : refill:
727 8605830 : vec_reset_length (ptd->buffers);
728 8605830 : vec_reset_length (ptd->copy_ops);
729 :
730 8605830 : if (type == MEMIF_RING_M2S)
731 : {
732 0 : u16 head = ring->head;
733 0 : n_slots = ring_size - head + mq->last_tail;
734 :
735 0 : while (n_slots--)
736 : {
737 0 : u16 s = head++ & mask;
738 0 : memif_desc_t *d = &ring->desc[s];
739 0 : d->length = mif->run.buffer_size;
740 : }
741 :
742 0 : __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
743 : }
744 :
745 8605830 : return ptd->n_packets;
746 : }
747 :
748 : static_always_inline uword
749 8602760 : memif_device_input_zc_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
750 : memif_if_t *mif, u16 qid,
751 : memif_interface_mode_t mode)
752 : {
753 8602760 : vnet_main_t *vnm = vnet_get_main ();
754 8602760 : memif_main_t *mm = &memif_main;
755 : memif_ring_t *ring;
756 : memif_queue_t *mq;
757 : u32 next_index;
758 8602760 : uword n_trace = vlib_get_trace_count (vm, node);
759 8602760 : u32 n_rx_packets = 0, n_rx_bytes = 0;
760 8602760 : u32 *to_next = 0, *buffers;
761 : u32 bi0, bi1, bi2, bi3;
762 : u16 slot, s0;
763 : memif_desc_t *d0;
764 : vlib_buffer_t *b0, *b1, *b2, *b3;
765 8602760 : u32 thread_index = vm->thread_index;
766 8602760 : memif_per_thread_data_t *ptd = vec_elt_at_index (mm->per_thread_data,
767 : thread_index);
768 : u16 cur_slot, last_slot, ring_size, n_slots, mask, head;
769 : i16 start_offset;
770 : u64 offset;
771 : u32 buffer_length;
772 : u16 n_alloc, n_from;
773 :
774 8602760 : mq = vec_elt_at_index (mif->rx_queues, qid);
775 8602760 : ring = mq->ring;
776 8602760 : ring_size = 1 << mq->log2_ring_size;
777 8602760 : mask = ring_size - 1;
778 :
779 8602760 : next_index = (mode == MEMIF_INTERFACE_MODE_IP) ?
780 8602760 : VNET_DEVICE_INPUT_NEXT_IP6_INPUT : VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
781 :
782 : /* asume that somebody will want to add ethernet header on the packet
783 : so start with IP header at offset 14 */
784 8602760 : start_offset = (mode == MEMIF_INTERFACE_MODE_IP) ? 14 : 0;
785 8602760 : buffer_length = vlib_buffer_get_default_data_size (vm) - start_offset;
786 :
787 8602760 : cur_slot = mq->last_tail;
788 8602760 : last_slot = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
789 8602760 : if (cur_slot == last_slot)
790 8602740 : goto refill;
791 12 : n_slots = last_slot - cur_slot;
792 :
793 : /* process ring slots */
794 12 : vec_validate_aligned (ptd->buffers, MEMIF_RX_VECTOR_SZ,
795 : CLIB_CACHE_LINE_BYTES);
796 24 : while (n_slots && n_rx_packets < MEMIF_RX_VECTOR_SZ)
797 : {
798 : vlib_buffer_t *hb;
799 :
800 12 : s0 = cur_slot & mask;
801 12 : bi0 = mq->buffers[s0];
802 12 : ptd->buffers[n_rx_packets++] = bi0;
803 :
804 12 : clib_prefetch_load (&ring->desc[(cur_slot + 8) & mask]);
805 12 : d0 = &ring->desc[s0];
806 12 : hb = b0 = vlib_get_buffer (vm, bi0);
807 12 : b0->current_data = start_offset;
808 12 : b0->current_length = d0->length;
809 12 : n_rx_bytes += d0->length;
810 :
811 12 : cur_slot++;
812 12 : n_slots--;
813 12 : if (PREDICT_FALSE ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots))
814 : {
815 0 : hb->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
816 0 : hb->total_length_not_including_first_buffer = 0;
817 0 : next_slot:
818 0 : s0 = cur_slot & mask;
819 0 : d0 = &ring->desc[s0];
820 0 : bi0 = mq->buffers[s0];
821 :
822 : /* previous buffer */
823 0 : b0->next_buffer = bi0;
824 0 : b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
825 :
826 : /* current buffer */
827 0 : b0 = vlib_get_buffer (vm, bi0);
828 0 : b0->current_data = start_offset;
829 0 : b0->current_length = d0->length;
830 0 : hb->total_length_not_including_first_buffer += d0->length;
831 0 : n_rx_bytes += d0->length;
832 :
833 0 : cur_slot++;
834 0 : n_slots--;
835 0 : if ((d0->flags & MEMIF_DESC_FLAG_NEXT) && n_slots)
836 0 : goto next_slot;
837 : }
838 : }
839 :
840 : /* release slots from the ring */
841 12 : mq->last_tail = cur_slot;
842 :
843 12 : n_from = n_rx_packets;
844 12 : buffers = ptd->buffers;
845 :
846 24 : while (n_from)
847 : {
848 : u32 n_left_to_next;
849 : u32 next0, next1, next2, next3;
850 :
851 12 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
852 12 : while (n_from >= 8 && n_left_to_next >= 4)
853 : {
854 0 : b0 = vlib_get_buffer (vm, buffers[4]);
855 0 : b1 = vlib_get_buffer (vm, buffers[5]);
856 0 : b2 = vlib_get_buffer (vm, buffers[6]);
857 0 : b3 = vlib_get_buffer (vm, buffers[7]);
858 0 : vlib_prefetch_buffer_header (b0, STORE);
859 0 : vlib_prefetch_buffer_header (b1, STORE);
860 0 : vlib_prefetch_buffer_header (b2, STORE);
861 0 : vlib_prefetch_buffer_header (b3, STORE);
862 :
863 : /* enqueue buffer */
864 0 : to_next[0] = bi0 = buffers[0];
865 0 : to_next[1] = bi1 = buffers[1];
866 0 : to_next[2] = bi2 = buffers[2];
867 0 : to_next[3] = bi3 = buffers[3];
868 0 : to_next += 4;
869 0 : n_left_to_next -= 4;
870 0 : buffers += 4;
871 :
872 0 : b0 = vlib_get_buffer (vm, bi0);
873 0 : b1 = vlib_get_buffer (vm, bi1);
874 0 : b2 = vlib_get_buffer (vm, bi2);
875 0 : b3 = vlib_get_buffer (vm, bi3);
876 :
877 0 : vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
878 0 : vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
879 0 : vnet_buffer (b1)->sw_if_index[VLIB_RX] = mif->sw_if_index;
880 0 : vnet_buffer (b1)->sw_if_index[VLIB_TX] = ~0;
881 0 : vnet_buffer (b2)->sw_if_index[VLIB_RX] = mif->sw_if_index;
882 0 : vnet_buffer (b2)->sw_if_index[VLIB_TX] = ~0;
883 0 : vnet_buffer (b3)->sw_if_index[VLIB_RX] = mif->sw_if_index;
884 0 : vnet_buffer (b3)->sw_if_index[VLIB_TX] = ~0;
885 :
886 0 : if (mode == MEMIF_INTERFACE_MODE_IP)
887 : {
888 0 : next0 = memif_next_from_ip_hdr (node, b0);
889 0 : next1 = memif_next_from_ip_hdr (node, b1);
890 0 : next2 = memif_next_from_ip_hdr (node, b2);
891 0 : next3 = memif_next_from_ip_hdr (node, b3);
892 : }
893 0 : else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
894 : {
895 0 : if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
896 : {
897 0 : next0 = mif->per_interface_next_index;
898 0 : next1 = mif->per_interface_next_index;
899 0 : next2 = mif->per_interface_next_index;
900 0 : next3 = mif->per_interface_next_index;
901 : }
902 : else
903 : {
904 0 : next0 = next1 = next2 = next3 = next_index;
905 : /* redirect if feature path enabled */
906 0 : vnet_feature_start_device_input_x1 (mif->sw_if_index,
907 : &next0, b0);
908 0 : vnet_feature_start_device_input_x1 (mif->sw_if_index,
909 : &next1, b1);
910 0 : vnet_feature_start_device_input_x1 (mif->sw_if_index,
911 : &next2, b2);
912 0 : vnet_feature_start_device_input_x1 (mif->sw_if_index,
913 : &next3, b3);
914 : }
915 : }
916 :
917 : /* trace */
918 0 : if (PREDICT_FALSE (n_trace > 0))
919 : {
920 0 : memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
921 0 : if (PREDICT_FALSE (n_trace > 0))
922 0 : memif_trace_buffer (vm, node, mif, b1, next1, qid, &n_trace);
923 0 : if (PREDICT_FALSE (n_trace > 0))
924 0 : memif_trace_buffer (vm, node, mif, b2, next2, qid, &n_trace);
925 0 : if (PREDICT_FALSE (n_trace > 0))
926 0 : memif_trace_buffer (vm, node, mif, b3, next3, qid, &n_trace);
927 : }
928 :
929 : /* enqueue */
930 0 : vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
931 : n_left_to_next, bi0, bi1, bi2, bi3,
932 : next0, next1, next2, next3);
933 :
934 : /* next */
935 0 : n_from -= 4;
936 : }
937 24 : while (n_from && n_left_to_next)
938 : {
939 : /* enqueue buffer */
940 12 : to_next[0] = bi0 = buffers[0];
941 12 : to_next += 1;
942 12 : n_left_to_next--;
943 12 : buffers += 1;
944 :
945 12 : b0 = vlib_get_buffer (vm, bi0);
946 12 : vnet_buffer (b0)->sw_if_index[VLIB_RX] = mif->sw_if_index;
947 12 : vnet_buffer (b0)->sw_if_index[VLIB_TX] = ~0;
948 :
949 12 : if (mode == MEMIF_INTERFACE_MODE_IP)
950 : {
951 0 : next0 = memif_next_from_ip_hdr (node, b0);
952 : }
953 12 : else if (mode == MEMIF_INTERFACE_MODE_ETHERNET)
954 : {
955 12 : if (PREDICT_FALSE (mif->per_interface_next_index != ~0))
956 0 : next0 = mif->per_interface_next_index;
957 : else
958 : {
959 12 : next0 = next_index;
960 : /* redirect if feature path enabled */
961 12 : vnet_feature_start_device_input_x1 (mif->sw_if_index,
962 : &next0, b0);
963 : }
964 : }
965 :
966 : /* trace */
967 12 : if (PREDICT_FALSE (n_trace > 0))
968 0 : memif_trace_buffer (vm, node, mif, b0, next0, qid, &n_trace);
969 :
970 : /* enqueue */
971 12 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
972 : n_left_to_next, bi0, next0);
973 :
974 : /* next */
975 12 : n_from--;
976 : }
977 12 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
978 : }
979 :
980 12 : vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
981 : + VNET_INTERFACE_COUNTER_RX, thread_index,
982 : mif->sw_if_index, n_rx_packets,
983 : n_rx_bytes);
984 :
985 : /* refill ring with empty buffers */
986 8602760 : refill:
987 8602760 : vec_reset_length (ptd->buffers);
988 :
989 8602760 : head = ring->head;
990 8602760 : n_slots = ring_size - head + mq->last_tail;
991 8602760 : slot = head & mask;
992 :
993 8602760 : n_slots &= ~7;
994 :
995 8602760 : if (n_slots < 32)
996 8602750 : goto done;
997 :
998 7 : memif_desc_t desc_template, *dt = &desc_template;
999 7 : clib_memset (dt, 0, sizeof (memif_desc_t));
1000 7 : dt->length = buffer_length;
1001 :
1002 14 : n_alloc = vlib_buffer_alloc_to_ring_from_pool (
1003 7 : vm, mq->buffers, slot, ring_size, n_slots, mq->buffer_pool_index);
1004 7 : dt->region = mq->buffer_pool_index + 1;
1005 7 : offset = (u64) mif->regions[dt->region].shm - start_offset;
1006 :
1007 7 : if (PREDICT_FALSE (n_alloc != n_slots))
1008 0 : vlib_error_count (vm, node->node_index,
1009 : MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
1010 :
1011 7 : head += n_alloc;
1012 :
1013 903 : while (n_alloc)
1014 : {
1015 896 : memif_desc_t *d = ring->desc + slot;
1016 896 : u32 *bi = mq->buffers + slot;
1017 :
1018 896 : if (PREDICT_FALSE (((slot + 7 > mask) || (n_alloc < 8))))
1019 0 : goto one_by_one;
1020 :
1021 896 : clib_memcpy_fast (d + 0, dt, sizeof (memif_desc_t));
1022 896 : clib_memcpy_fast (d + 1, dt, sizeof (memif_desc_t));
1023 896 : clib_memcpy_fast (d + 2, dt, sizeof (memif_desc_t));
1024 896 : clib_memcpy_fast (d + 3, dt, sizeof (memif_desc_t));
1025 896 : clib_memcpy_fast (d + 4, dt, sizeof (memif_desc_t));
1026 896 : clib_memcpy_fast (d + 5, dt, sizeof (memif_desc_t));
1027 896 : clib_memcpy_fast (d + 6, dt, sizeof (memif_desc_t));
1028 896 : clib_memcpy_fast (d + 7, dt, sizeof (memif_desc_t));
1029 :
1030 896 : d[0].offset = (u64) vlib_get_buffer (vm, bi[0])->data - offset;
1031 896 : d[1].offset = (u64) vlib_get_buffer (vm, bi[1])->data - offset;
1032 896 : d[2].offset = (u64) vlib_get_buffer (vm, bi[2])->data - offset;
1033 896 : d[3].offset = (u64) vlib_get_buffer (vm, bi[3])->data - offset;
1034 896 : d[4].offset = (u64) vlib_get_buffer (vm, bi[4])->data - offset;
1035 896 : d[5].offset = (u64) vlib_get_buffer (vm, bi[5])->data - offset;
1036 896 : d[6].offset = (u64) vlib_get_buffer (vm, bi[6])->data - offset;
1037 896 : d[7].offset = (u64) vlib_get_buffer (vm, bi[7])->data - offset;
1038 :
1039 896 : slot = (slot + 8) & mask;
1040 896 : n_alloc -= 8;
1041 896 : continue;
1042 :
1043 0 : one_by_one:
1044 0 : clib_memcpy_fast (d, dt, sizeof (memif_desc_t));
1045 0 : d[0].offset = (u64) vlib_get_buffer (vm, bi[0])->data - offset;
1046 :
1047 0 : slot = (slot + 1) & mask;
1048 0 : n_alloc -= 1;
1049 : }
1050 :
1051 7 : __atomic_store_n (&ring->head, head, __ATOMIC_RELEASE);
1052 :
1053 8602760 : done:
1054 8602760 : return n_rx_packets;
1055 : }
1056 :
1057 1677 : CLIB_MARCH_FN (memif_dma_completion_cb, void, vlib_main_t *vm,
1058 : vlib_dma_batch_t *b)
1059 : {
1060 0 : memif_main_t *mm = &memif_main;
1061 0 : memif_if_t *mif = vec_elt_at_index (mm->interfaces, b->cookie >> 16);
1062 0 : u32 thread_index = vm->thread_index;
1063 0 : u32 n_left_to_next = 0;
1064 : u16 nexts[MEMIF_RX_VECTOR_SZ], *next;
1065 0 : u32 _to_next_bufs[MEMIF_RX_VECTOR_SZ], *to_next_bufs = _to_next_bufs, *bi;
1066 : uword n_trace;
1067 : memif_dma_info_t *dma_info;
1068 0 : u16 qid = b->cookie & 0xffff;
1069 0 : memif_queue_t *mq = vec_elt_at_index (mif->rx_queues, qid);
1070 0 : dma_info = mq->dma_info + mq->dma_info_head;
1071 0 : memif_per_thread_data_t *ptd = &dma_info->data;
1072 0 : vnet_main_t *vnm = vnet_get_main ();
1073 :
1074 0 : u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
1075 :
1076 0 : __atomic_store_n (&mq->ring->tail, dma_info->dma_tail, __ATOMIC_RELEASE);
1077 :
1078 : /* prepare buffer template and next indices */
1079 0 : i16 start_offset =
1080 0 : (dma_info->mode == MEMIF_INTERFACE_MODE_IP) ? MEMIF_IP_OFFSET : 0;
1081 0 : vnet_buffer (&ptd->buffer_template)->sw_if_index[VLIB_RX] = mif->sw_if_index;
1082 0 : vnet_buffer (&ptd->buffer_template)->feature_arc_index = 0;
1083 0 : ptd->buffer_template.current_data = start_offset;
1084 0 : ptd->buffer_template.current_config_index = 0;
1085 0 : ptd->buffer_template.buffer_pool_index = mq->buffer_pool_index;
1086 0 : ptd->buffer_template.ref_count = 1;
1087 :
1088 0 : if (dma_info->mode == MEMIF_INTERFACE_MODE_ETHERNET)
1089 : {
1090 0 : next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
1091 0 : if (mif->per_interface_next_index != ~0)
1092 0 : next_index = mif->per_interface_next_index;
1093 : else
1094 0 : vnet_feature_start_device_input_x1 (mif->sw_if_index, &next_index,
1095 : &ptd->buffer_template);
1096 :
1097 0 : vlib_get_new_next_frame (vm, dma_info->node, next_index, to_next_bufs,
1098 : n_left_to_next);
1099 0 : if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT))
1100 : {
1101 : vlib_next_frame_t *nf;
1102 : vlib_frame_t *f;
1103 : ethernet_input_frame_t *ef;
1104 : nf =
1105 0 : vlib_node_runtime_get_next_frame (vm, dma_info->node, next_index);
1106 0 : f = vlib_get_frame (vm, nf->frame);
1107 0 : f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX;
1108 :
1109 0 : ef = vlib_frame_scalar_args (f);
1110 0 : ef->sw_if_index = mif->sw_if_index;
1111 0 : ef->hw_if_index = mif->hw_if_index;
1112 0 : vlib_frame_no_append (f);
1113 : }
1114 : }
1115 :
1116 0 : vec_reset_length (ptd->buffers);
1117 :
1118 0 : if (dma_info->mode == MEMIF_INTERFACE_MODE_IP)
1119 0 : memif_fill_buffer_mdata (vm, dma_info->node, ptd, mif, to_next_bufs, nexts,
1120 : 1);
1121 : else
1122 0 : memif_fill_buffer_mdata (vm, dma_info->node, ptd, mif, to_next_bufs, nexts,
1123 : 0);
1124 :
1125 : /* packet trace if enabled */
1126 0 : if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, dma_info->node))))
1127 : {
1128 0 : u32 n_left = ptd->n_packets;
1129 0 : bi = to_next_bufs;
1130 0 : next = nexts;
1131 0 : u32 ni = next_index;
1132 0 : while (n_trace && n_left)
1133 : {
1134 : vlib_buffer_t *b;
1135 : memif_input_trace_t *tr;
1136 0 : if (dma_info->mode != MEMIF_INTERFACE_MODE_ETHERNET)
1137 0 : ni = next[0];
1138 0 : b = vlib_get_buffer (vm, bi[0]);
1139 0 : if (PREDICT_TRUE (vlib_trace_buffer (vm, dma_info->node, ni, b,
1140 : /* follow_chain */ 0)))
1141 : {
1142 0 : tr = vlib_add_trace (vm, dma_info->node, b, sizeof (*tr));
1143 0 : tr->next_index = ni;
1144 0 : tr->hw_if_index = mif->hw_if_index;
1145 0 : tr->ring = qid;
1146 0 : n_trace--;
1147 : }
1148 :
1149 : /* next */
1150 0 : n_left--;
1151 0 : bi++;
1152 0 : next++;
1153 : }
1154 0 : vlib_set_trace_count (vm, dma_info->node, n_trace);
1155 : }
1156 :
1157 0 : if (dma_info->mode == MEMIF_INTERFACE_MODE_ETHERNET)
1158 : {
1159 0 : n_left_to_next -= ptd->n_packets;
1160 0 : vlib_put_next_frame (vm, dma_info->node, next_index, n_left_to_next);
1161 : }
1162 : else
1163 0 : vlib_buffer_enqueue_to_next (vm, dma_info->node, to_next_bufs, nexts,
1164 0 : ptd->n_packets);
1165 :
1166 0 : vlib_increment_combined_counter (
1167 : vnm->interface_main.combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
1168 0 : thread_index, mif->sw_if_index, ptd->n_packets, ptd->n_rx_bytes);
1169 :
1170 0 : mq->dma_info_head++;
1171 0 : if (mq->dma_info_head == mq->dma_info_size)
1172 0 : mq->dma_info_head = 0;
1173 :
1174 0 : return;
1175 : }
1176 :
1177 : #ifndef CLIB_MARCH_VARIANT
1178 : void
1179 0 : memif_dma_completion_cb (vlib_main_t *vm, vlib_dma_batch_t *b)
1180 : {
1181 0 : return CLIB_MARCH_FN_SELECT (memif_dma_completion_cb) (vm, b);
1182 : }
1183 : #endif
1184 :
1185 : static_always_inline uword
1186 0 : memif_device_input_inline_dma (vlib_main_t *vm, vlib_node_runtime_t *node,
1187 : memif_if_t *mif, memif_ring_type_t type,
1188 : u16 qid, memif_interface_mode_t mode)
1189 : {
1190 0 : memif_main_t *mm = &memif_main;
1191 : memif_ring_t *ring;
1192 : memif_queue_t *mq;
1193 : memif_per_thread_data_t *ptd;
1194 : u16 cur_slot, n_slots;
1195 : u16 n_buffers, n_alloc, n_desc;
1196 : memif_copy_op_t *co;
1197 : memif_dma_info_t *dma_info;
1198 :
1199 0 : u16 mif_id = mif - mm->interfaces;
1200 : u32 i;
1201 :
1202 0 : mq = vec_elt_at_index (mif->rx_queues, qid);
1203 0 : ring = mq->ring;
1204 :
1205 0 : cur_slot = mq->last_head;
1206 0 : n_slots = __atomic_load_n (&ring->head, __ATOMIC_ACQUIRE) - cur_slot;
1207 :
1208 0 : if (n_slots == 0)
1209 0 : return 0;
1210 :
1211 0 : if ((mq->dma_info_tail + 1 == mq->dma_info_head) ||
1212 0 : ((mq->dma_info_head == mq->dma_info_size - 1) &&
1213 0 : (mq->dma_info_tail == 0)))
1214 0 : return 0;
1215 :
1216 : vlib_dma_batch_t *db;
1217 0 : db = vlib_dma_batch_new (vm, mif->dma_input_config);
1218 0 : if (!db)
1219 0 : return 0;
1220 :
1221 0 : dma_info = mq->dma_info + mq->dma_info_tail;
1222 0 : dma_info->node = node;
1223 0 : dma_info->mode = mode;
1224 0 : ptd = &dma_info->data;
1225 0 : vec_validate_aligned (dma_info->data.desc_len,
1226 : pow2_mask (mq->log2_ring_size), CLIB_CACHE_LINE_BYTES);
1227 :
1228 0 : n_desc = memif_parse_desc (&dma_info->data, mif, mq, cur_slot, n_slots);
1229 0 : cur_slot += n_desc;
1230 :
1231 0 : if (mif->mode == MEMIF_INTERFACE_MODE_ETHERNET)
1232 0 : memif_validate_desc_data (&dma_info->data, mif, n_desc,
1233 : /* is_ethernet */ 1);
1234 : else
1235 0 : memif_validate_desc_data (&dma_info->data, mif, n_desc,
1236 : /* is_ethernet */ 0);
1237 :
1238 0 : n_buffers = memif_process_desc (vm, node, ptd, mif);
1239 :
1240 0 : if (PREDICT_FALSE (n_buffers == 0))
1241 : {
1242 : /* All descriptors are bad. Release slots in the ring and bail */
1243 0 : memif_advance_ring (type, mq, ring, cur_slot);
1244 0 : goto done;
1245 : }
1246 :
1247 : /* allocate free buffers */
1248 0 : vec_validate_aligned (dma_info->data.buffers, n_buffers - 1,
1249 : CLIB_CACHE_LINE_BYTES);
1250 0 : n_alloc = vlib_buffer_alloc_from_pool (vm, dma_info->data.buffers, n_buffers,
1251 0 : mq->buffer_pool_index);
1252 0 : if (PREDICT_FALSE (n_alloc != n_buffers))
1253 : {
1254 0 : if (n_alloc)
1255 0 : vlib_buffer_free (vm, dma_info->data.buffers, n_alloc);
1256 0 : vlib_error_count (vm, node->node_index,
1257 : MEMIF_INPUT_ERROR_BUFFER_ALLOC_FAIL, 1);
1258 0 : goto done;
1259 : }
1260 :
1261 0 : dma_info->data.n_rx_bytes = ptd->n_rx_bytes;
1262 0 : dma_info->data.n_packets = ptd->n_packets;
1263 : /* copy data */
1264 : vlib_buffer_t *b;
1265 0 : u32 n_pkts = clib_min (MEMIF_RX_VECTOR_SZ, vec_len (ptd->copy_ops));
1266 0 : co = ptd->copy_ops;
1267 :
1268 0 : for (i = 0; i < n_pkts; i++)
1269 : {
1270 0 : b = vlib_get_buffer (vm, ptd->buffers[co[i].buffer_vec_index]);
1271 0 : vlib_dma_batch_add (vm, db, b->data + co[i].buffer_offset, co[i].data,
1272 0 : co[i].data_len);
1273 : }
1274 :
1275 0 : for (i = n_pkts; i < vec_len (ptd->copy_ops); i++)
1276 : {
1277 0 : b = vlib_get_buffer (vm, ptd->buffers[co[i].buffer_vec_index]);
1278 0 : vlib_dma_batch_add (vm, db, b->data + co[i].buffer_offset, co[i].data,
1279 0 : co[i].data_len);
1280 : }
1281 :
1282 0 : dma_info->dma_tail = cur_slot;
1283 0 : mq->last_head = dma_info->dma_tail;
1284 0 : mq->dma_info_tail++;
1285 0 : if (mq->dma_info_tail == mq->dma_info_size)
1286 0 : mq->dma_info_tail = 0;
1287 :
1288 0 : done:
1289 0 : vlib_dma_batch_set_cookie (vm, db, ((u64) mif_id << 16) | qid);
1290 0 : vlib_dma_batch_submit (vm, db);
1291 0 : vec_reset_length (ptd->copy_ops);
1292 :
1293 0 : return ptd->n_packets;
1294 : }
1295 :
1296 4991396 : VLIB_NODE_FN (memif_input_node) (vlib_main_t * vm,
1297 : vlib_node_runtime_t * node,
1298 : vlib_frame_t * frame)
1299 : {
1300 4989160 : u32 n_rx = 0;
1301 4989160 : memif_main_t *mm = &memif_main;
1302 4989160 : memif_interface_mode_t mode_ip = MEMIF_INTERFACE_MODE_IP;
1303 4989160 : memif_interface_mode_t mode_eth = MEMIF_INTERFACE_MODE_ETHERNET;
1304 :
1305 : vnet_hw_if_rxq_poll_vector_t *pv;
1306 4989160 : pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
1307 22203900 : for (int i = 0; i < vec_len (pv); i++)
1308 : {
1309 : memif_if_t *mif;
1310 : u32 qid;
1311 17214700 : mif = vec_elt_at_index (mm->interfaces, pv[i].dev_instance);
1312 17214700 : qid = pv[i].queue_id;
1313 17214700 : if ((mif->flags & MEMIF_IF_FLAG_ADMIN_UP) &&
1314 17208600 : (mif->flags & MEMIF_IF_FLAG_CONNECTED))
1315 : {
1316 17208600 : if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
1317 : {
1318 8602760 : if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1319 0 : n_rx +=
1320 0 : memif_device_input_zc_inline (vm, node, mif, qid, mode_ip);
1321 : else
1322 8602760 : n_rx +=
1323 8602760 : memif_device_input_zc_inline (vm, node, mif, qid, mode_eth);
1324 : }
1325 8605830 : else if (mif->flags & MEMIF_IF_FLAG_IS_SLAVE)
1326 : {
1327 0 : if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1328 0 : n_rx += memif_device_input_inline (
1329 : vm, node, mif, MEMIF_RING_M2S, qid, mode_ip);
1330 : else
1331 0 : n_rx += memif_device_input_inline (
1332 : vm, node, mif, MEMIF_RING_M2S, qid, mode_eth);
1333 : }
1334 : else
1335 : {
1336 8605830 : if ((mif->flags & MEMIF_IF_FLAG_USE_DMA) &&
1337 0 : (mif->dma_input_config >= 0))
1338 : {
1339 0 : if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1340 0 : n_rx += memif_device_input_inline_dma (
1341 : vm, node, mif, MEMIF_RING_S2M, qid, mode_ip);
1342 : else
1343 0 : n_rx += memif_device_input_inline_dma (
1344 : vm, node, mif, MEMIF_RING_S2M, qid, mode_eth);
1345 : }
1346 : else
1347 : {
1348 8605830 : if (mif->mode == MEMIF_INTERFACE_MODE_IP)
1349 0 : n_rx += memif_device_input_inline (
1350 : vm, node, mif, MEMIF_RING_S2M, qid, mode_ip);
1351 : else
1352 8605830 : n_rx += memif_device_input_inline (
1353 : vm, node, mif, MEMIF_RING_S2M, qid, mode_eth);
1354 : }
1355 : }
1356 : }
1357 : }
1358 :
1359 4989160 : return n_rx;
1360 : }
1361 :
1362 : /* *INDENT-OFF* */
1363 76184 : VLIB_REGISTER_NODE (memif_input_node) = {
1364 : .name = "memif-input",
1365 : .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1366 : .sibling_of = "device-input",
1367 : .format_trace = format_memif_input_trace,
1368 : .type = VLIB_NODE_TYPE_INPUT,
1369 : .state = VLIB_NODE_STATE_INTERRUPT,
1370 : .n_errors = MEMIF_INPUT_N_ERROR,
1371 : .error_counters = memif_input_error_counters,
1372 : };
1373 :
1374 : /* *INDENT-ON* */
1375 :
1376 :
1377 : /*
1378 : * fd.io coding-style-patch-verification: ON
1379 : *
1380 : * Local Variables:
1381 : * eval: (c-set-style "gnu")
1382 : * End:
1383 : */
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