2 * Copyright (c) 2017-2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
19 #include <rte_config.h>
21 #include <rte_ethdev.h>
23 #include <rte_version.h>
25 #include <vlib/vlib.h>
26 #include <dpdk/buffer.h>
28 STATIC_ASSERT (VLIB_BUFFER_PRE_DATA_SIZE == RTE_PKTMBUF_HEADROOM,
29 "VLIB_BUFFER_PRE_DATA_SIZE must be equal to RTE_PKTMBUF_HEADROOM");
31 extern struct rte_mbuf *dpdk_mbuf_template_by_pool_index;
32 #ifndef CLIB_MARCH_VARIANT
33 struct rte_mempool **dpdk_mempool_by_buffer_pool_index = 0;
34 struct rte_mempool **dpdk_no_cache_mempool_by_buffer_pool_index = 0;
35 struct rte_mbuf *dpdk_mbuf_template_by_pool_index = 0;
38 dpdk_buffer_pool_init (vlib_main_t * vm, vlib_buffer_pool_t * bp)
40 uword buffer_mem_start = vm->buffer_main->buffer_mem_start;
41 struct rte_mempool *mp, *nmp;
42 struct rte_pktmbuf_pool_private priv;
43 enum rte_iova_mode iova_mode;
48 sizeof (struct rte_mbuf) + sizeof (vlib_buffer_t) + bp->data_size;
50 /* create empty mempools */
51 vec_validate_aligned (dpdk_mempool_by_buffer_pool_index, bp->index,
52 CLIB_CACHE_LINE_BYTES);
53 vec_validate_aligned (dpdk_no_cache_mempool_by_buffer_pool_index, bp->index,
54 CLIB_CACHE_LINE_BYTES);
57 name = format (name, "vpp pool %u%c", bp->index, 0);
58 mp = rte_mempool_create_empty ((char *) name, bp->n_buffers,
59 elt_size, 512, sizeof (priv),
64 return clib_error_return (0,
65 "failed to create normal mempool for numa node %u",
68 vec_reset_length (name);
70 /* non-cached mempool */
71 name = format (name, "vpp pool %u (no cache)%c", bp->index, 0);
72 nmp = rte_mempool_create_empty ((char *) name, bp->n_buffers,
73 elt_size, 0, sizeof (priv),
77 rte_mempool_free (mp);
79 return clib_error_return (0,
80 "failed to create non-cache mempool for numa nude %u",
85 dpdk_mempool_by_buffer_pool_index[bp->index] = mp;
86 dpdk_no_cache_mempool_by_buffer_pool_index[bp->index] = nmp;
88 mp->pool_id = nmp->pool_id = bp->index;
90 rte_mempool_set_ops_byname (mp, "vpp", NULL);
91 rte_mempool_set_ops_byname (nmp, "vpp-no-cache", NULL);
93 /* Call the mempool priv initializer */
94 priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
95 vlib_buffer_get_default_data_size (vm);
96 priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
97 rte_pktmbuf_pool_init (mp, &priv);
98 rte_pktmbuf_pool_init (nmp, &priv);
100 iova_mode = rte_eal_iova_mode ();
102 /* populate mempool object buffer header */
103 for (i = 0; i < bp->n_buffers; i++)
105 struct rte_mempool_objhdr *hdr;
106 vlib_buffer_t *b = vlib_get_buffer (vm, bp->buffers[i]);
107 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer (b);
108 hdr = (struct rte_mempool_objhdr *) RTE_PTR_SUB (mb, sizeof (*hdr));
110 hdr->iova = (iova_mode == RTE_IOVA_VA) ?
111 pointer_to_uword (mb) : vlib_physmem_get_pa (vm, mb);
112 STAILQ_INSERT_TAIL (&mp->elt_list, hdr, next);
113 STAILQ_INSERT_TAIL (&nmp->elt_list, hdr, next);
114 mp->populated_size++;
115 nmp->populated_size++;
118 /* call the object initializers */
119 rte_mempool_obj_iter (mp, rte_pktmbuf_init, 0);
121 /* create mbuf header tempate from the first buffer in the pool */
122 vec_validate_aligned (dpdk_mbuf_template_by_pool_index, bp->index,
123 CLIB_CACHE_LINE_BYTES);
124 clib_memcpy (vec_elt_at_index (dpdk_mbuf_template_by_pool_index, bp->index),
125 rte_mbuf_from_vlib_buffer (vlib_buffer_ptr_from_index
126 (buffer_mem_start, *bp->buffers,
127 0)), sizeof (struct rte_mbuf));
129 for (i = 0; i < bp->n_buffers; i++)
132 b = vlib_buffer_ptr_from_index (buffer_mem_start, bp->buffers[i], 0);
133 vlib_buffer_copy_template (b, &bp->buffer_template);
136 /* map DMA pages if at least one physical device exists */
137 if (rte_eth_dev_count_avail ())
141 vlib_physmem_map_t *pm;
144 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
145 page_sz = 1ULL << pm->log2_page_size;
147 for (i = 0; i < pm->n_pages; i++)
149 char *va = ((char *) pm->base) + i * page_sz;
150 uword pa = (iova_mode == RTE_IOVA_VA) ?
151 pointer_to_uword (va) : pm->page_table[i];
154 #if RTE_VERSION < RTE_VERSION_NUM(19, 11, 0, 0)
155 rte_vfio_dma_map (pointer_to_uword (va), pa, page_sz))
157 rte_vfio_container_dma_map (RTE_VFIO_DEFAULT_CONTAINER_FD,
158 pointer_to_uword (va), pa, page_sz))
162 struct rte_mempool_memhdr *memhdr;
163 memhdr = clib_mem_alloc (sizeof (*memhdr));
167 memhdr->len = page_sz;
171 STAILQ_INSERT_TAIL (&mp->mem_list, memhdr, next);
180 dpdk_ops_vpp_alloc (struct rte_mempool *mp)
187 dpdk_ops_vpp_free (struct rte_mempool *mp)
194 static_always_inline void
195 dpdk_ops_vpp_enqueue_one (vlib_buffer_t * bt, void *obj)
197 /* Only non-replicated packets (b->ref_count == 1) expected */
199 struct rte_mbuf *mb = obj;
200 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
201 ASSERT (b->ref_count == 1);
202 ASSERT (b->buffer_pool_index == bt->buffer_pool_index);
203 vlib_buffer_copy_template (b, bt);
207 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue) (struct rte_mempool * mp,
208 void *const *obj_table, unsigned n)
210 const int batch_size = 32;
211 vlib_main_t *vm = vlib_get_main ();
213 u8 buffer_pool_index = mp->pool_id;
214 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
215 u32 bufs[batch_size];
217 void *const *obj = obj_table;
219 vlib_buffer_copy_template (&bt, &bp->buffer_template);
223 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
224 dpdk_ops_vpp_enqueue_one (&bt, obj[1]);
225 dpdk_ops_vpp_enqueue_one (&bt, obj[2]);
226 dpdk_ops_vpp_enqueue_one (&bt, obj[3]);
233 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
238 while (n >= batch_size)
240 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
242 sizeof (struct rte_mbuf));
243 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
245 obj_table += batch_size;
250 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
251 n, sizeof (struct rte_mbuf));
252 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n);
258 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue);
260 static_always_inline void
261 dpdk_ops_vpp_enqueue_no_cache_one (vlib_main_t * vm, struct rte_mempool *old,
262 struct rte_mempool *new, void *obj,
265 struct rte_mbuf *mb = obj;
266 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
268 if (clib_atomic_sub_fetch (&b->ref_count, 1) == 0)
270 u32 bi = vlib_get_buffer_index (vm, b);
271 vlib_buffer_copy_template (b, bt);
272 vlib_buffer_pool_put (vm, bt->buffer_pool_index, &bi, 1);
278 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue_no_cache) (struct rte_mempool * cmp,
279 void *const *obj_table,
282 vlib_main_t *vm = vlib_get_main ();
284 struct rte_mempool *mp;
285 mp = dpdk_mempool_by_buffer_pool_index[cmp->pool_id];
286 u8 buffer_pool_index = cmp->pool_id;
287 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
288 vlib_buffer_copy_template (&bt, &bp->buffer_template);
292 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
293 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[1], &bt);
294 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[2], &bt);
295 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[3], &bt);
302 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
310 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue_no_cache);
312 static_always_inline void
313 dpdk_mbuf_init_from_template (struct rte_mbuf **mba, struct rte_mbuf *mt,
316 /* Assumptions about rte_mbuf layout */
317 STATIC_ASSERT_OFFSET_OF (struct rte_mbuf, buf_addr, 0);
318 STATIC_ASSERT_OFFSET_OF (struct rte_mbuf, buf_iova, 8);
319 STATIC_ASSERT_SIZEOF_ELT (struct rte_mbuf, buf_iova, 8);
320 STATIC_ASSERT_SIZEOF_ELT (struct rte_mbuf, buf_iova, 8);
321 STATIC_ASSERT_SIZEOF (struct rte_mbuf, 128);
325 struct rte_mbuf *mb = mba[0];
327 /* bytes 0 .. 15 hold buf_addr and buf_iova which we need to preserve */
328 /* copy bytes 16 .. 31 */
329 *((u8x16 *) mb + 1) = *((u8x16 *) mt + 1);
331 /* copy bytes 32 .. 127 */
332 #ifdef CLIB_HAVE_VEC256
333 for (i = 1; i < 4; i++)
334 *((u8x32 *) mb + i) = *((u8x32 *) mt + i);
336 for (i = 2; i < 8; i++)
337 *((u8x16 *) mb + i) = *((u8x16 *) mt + i);
344 CLIB_MULTIARCH_FN (dpdk_ops_vpp_dequeue) (struct rte_mempool * mp,
345 void **obj_table, unsigned n)
347 const int batch_size = 32;
348 vlib_main_t *vm = vlib_get_main ();
349 u32 bufs[batch_size], total = 0, n_alloc = 0;
350 u8 buffer_pool_index = mp->pool_id;
351 void **obj = obj_table;
352 struct rte_mbuf t = dpdk_mbuf_template_by_pool_index[buffer_pool_index];
354 while (n >= batch_size)
356 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, batch_size,
358 if (n_alloc != batch_size)
361 vlib_get_buffers_with_offset (vm, bufs, obj, batch_size,
362 -(i32) sizeof (struct rte_mbuf));
363 dpdk_mbuf_init_from_template ((struct rte_mbuf **) obj, &t, batch_size);
371 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, n, buffer_pool_index);
376 vlib_get_buffers_with_offset (vm, bufs, obj, n,
377 -(i32) sizeof (struct rte_mbuf));
378 dpdk_mbuf_init_from_template ((struct rte_mbuf **) obj, &t, n);
384 /* dpdk doesn't support partial alloc, so we need to return what we
387 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n_alloc);
391 vlib_get_buffer_indices_with_offset (vm, obj, bufs, batch_size,
392 sizeof (struct rte_mbuf));
393 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
401 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_dequeue);
403 #ifndef CLIB_MARCH_VARIANT
406 dpdk_ops_vpp_dequeue_no_cache (struct rte_mempool *mp, void **obj_table,
414 dpdk_ops_vpp_get_count (const struct rte_mempool *mp)
421 dpdk_ops_vpp_get_count_no_cache (const struct rte_mempool *mp)
423 struct rte_mempool *cmp;
424 cmp = dpdk_no_cache_mempool_by_buffer_pool_index[mp->pool_id];
425 return dpdk_ops_vpp_get_count (cmp);
429 dpdk_buffer_pools_create (vlib_main_t * vm)
432 vlib_buffer_pool_t *bp;
434 struct rte_mempool_ops ops = { };
436 strncpy (ops.name, "vpp", 4);
437 ops.alloc = dpdk_ops_vpp_alloc;
438 ops.free = dpdk_ops_vpp_free;
439 ops.get_count = dpdk_ops_vpp_get_count;
440 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue);
441 ops.dequeue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_dequeue);
442 rte_mempool_register_ops (&ops);
444 strncpy (ops.name, "vpp-no-cache", 13);
445 ops.get_count = dpdk_ops_vpp_get_count_no_cache;
446 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue_no_cache);
447 ops.dequeue = dpdk_ops_vpp_dequeue_no_cache;
448 rte_mempool_register_ops (&ops);
451 vec_foreach (bp, vm->buffer_main->buffer_pools)
452 if (bp->start && (err = dpdk_buffer_pool_init (vm, bp)))
458 VLIB_BUFFER_SET_EXT_HDR_SIZE (sizeof (struct rte_mempool_objhdr) +
459 sizeof (struct rte_mbuf));
465 * fd.io coding-style-patch-verification: ON
468 * eval: (c-set-style "gnu")