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>
24 #include <vlib/vlib.h>
25 #include <dpdk/buffer.h>
27 STATIC_ASSERT (VLIB_BUFFER_PRE_DATA_SIZE == RTE_PKTMBUF_HEADROOM,
28 "VLIB_BUFFER_PRE_DATA_SIZE must be equal to RTE_PKTMBUF_HEADROOM");
30 #ifndef CLIB_MARCH_VARIANT
31 struct rte_mempool **dpdk_mempool_by_buffer_pool_index = 0;
32 struct rte_mempool **dpdk_no_cache_mempool_by_buffer_pool_index = 0;
35 dpdk_buffer_pool_init (vlib_main_t * vm, vlib_buffer_pool_t * bp)
37 uword buffer_mem_start = vm->buffer_main->buffer_mem_start;
38 struct rte_mempool *mp, *nmp;
39 struct rte_pktmbuf_pool_private priv;
40 enum rte_iova_mode iova_mode;
45 sizeof (struct rte_mbuf) + sizeof (vlib_buffer_t) + bp->data_size;
47 /* create empty mempools */
48 vec_validate_aligned (dpdk_mempool_by_buffer_pool_index, bp->index,
49 CLIB_CACHE_LINE_BYTES);
50 vec_validate_aligned (dpdk_no_cache_mempool_by_buffer_pool_index, bp->index,
51 CLIB_CACHE_LINE_BYTES);
54 name = format (name, "vpp pool %u%c", bp->index, 0);
55 mp = rte_mempool_create_empty ((char *) name, vec_len (bp->buffers),
56 elt_size, 512, sizeof (priv),
61 return clib_error_return (0,
62 "failed to create normal mempool for numa node %u",
65 vec_reset_length (name);
67 /* non-cached mempool */
68 name = format (name, "vpp pool %u (no cache)%c", bp->index, 0);
69 nmp = rte_mempool_create_empty ((char *) name, vec_len (bp->buffers),
70 elt_size, 0, sizeof (priv),
74 rte_mempool_free (mp);
76 return clib_error_return (0,
77 "failed to create non-cache mempool for numa nude %u",
82 dpdk_mempool_by_buffer_pool_index[bp->index] = mp;
83 dpdk_no_cache_mempool_by_buffer_pool_index[bp->index] = nmp;
85 mp->pool_id = nmp->pool_id = bp->index;
87 rte_mempool_set_ops_byname (mp, "vpp", NULL);
88 rte_mempool_set_ops_byname (nmp, "vpp-no-cache", NULL);
90 /* Call the mempool priv initializer */
91 priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
92 vlib_buffer_get_default_data_size (vm);
93 priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
94 rte_pktmbuf_pool_init (mp, &priv);
95 rte_pktmbuf_pool_init (nmp, &priv);
97 iova_mode = rte_eal_iova_mode ();
99 /* populate mempool object buffer header */
101 vec_foreach (bi, bp->buffers)
103 struct rte_mempool_objhdr *hdr;
104 vlib_buffer_t *b = vlib_get_buffer (vm, *bi);
105 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer (b);
106 hdr = (struct rte_mempool_objhdr *) RTE_PTR_SUB (mb, sizeof (*hdr));
108 hdr->iova = (iova_mode == RTE_IOVA_VA) ?
109 pointer_to_uword (mb) : vlib_physmem_get_pa (vm, mb);
110 STAILQ_INSERT_TAIL (&mp->elt_list, hdr, next);
111 STAILQ_INSERT_TAIL (&nmp->elt_list, hdr, next);
112 mp->populated_size++;
113 nmp->populated_size++;
117 /* call the object initializers */
118 rte_mempool_obj_iter (mp, rte_pktmbuf_init, 0);
121 vec_foreach (bi, bp->buffers)
124 b = vlib_buffer_ptr_from_index (buffer_mem_start, *bi, 0);
125 vlib_buffer_copy_template (b, &bp->buffer_template);
129 /* map DMA pages if at least one physical device exists */
130 if (rte_eth_dev_count_avail ())
134 vlib_physmem_map_t *pm;
137 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
138 page_sz = 1ULL << pm->log2_page_size;
140 for (i = 0; i < pm->n_pages; i++)
142 char *va = ((char *) pm->base) + i * page_sz;
143 uword pa = (iova_mode == RTE_IOVA_VA) ?
144 pointer_to_uword (va) : pm->page_table[i];
147 rte_vfio_dma_map (pointer_to_uword (va), pa, page_sz))
150 struct rte_mempool_memhdr *memhdr;
151 memhdr = clib_mem_alloc (sizeof (*memhdr));
155 memhdr->len = page_sz;
159 STAILQ_INSERT_TAIL (&mp->mem_list, memhdr, next);
168 dpdk_ops_vpp_alloc (struct rte_mempool *mp)
175 dpdk_ops_vpp_free (struct rte_mempool *mp)
182 static_always_inline void
183 dpdk_ops_vpp_enqueue_one (vlib_buffer_t * bt, void *obj)
185 /* Only non-replicated packets (b->ref_count == 1) expected */
187 struct rte_mbuf *mb = obj;
188 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
189 ASSERT (b->ref_count == 1);
190 ASSERT (b->buffer_pool_index == bt->buffer_pool_index);
191 vlib_buffer_copy_template (b, bt);
195 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue) (struct rte_mempool * mp,
196 void *const *obj_table, unsigned n)
198 const int batch_size = 32;
199 vlib_main_t *vm = vlib_get_main ();
201 u8 buffer_pool_index = mp->pool_id;
202 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
203 u32 bufs[batch_size];
205 void *const *obj = obj_table;
207 vlib_buffer_copy_template (&bt, &bp->buffer_template);
211 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
212 dpdk_ops_vpp_enqueue_one (&bt, obj[1]);
213 dpdk_ops_vpp_enqueue_one (&bt, obj[2]);
214 dpdk_ops_vpp_enqueue_one (&bt, obj[3]);
221 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
226 while (n >= batch_size)
228 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
230 sizeof (struct rte_mbuf));
231 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
233 obj_table += batch_size;
238 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
239 n, sizeof (struct rte_mbuf));
240 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n);
246 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue);
248 static_always_inline void
249 dpdk_ops_vpp_enqueue_no_cache_one (vlib_main_t * vm, struct rte_mempool *old,
250 struct rte_mempool *new, void *obj,
253 struct rte_mbuf *mb = obj;
254 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
256 if (clib_atomic_sub_fetch (&b->ref_count, 1) == 0)
258 u32 bi = vlib_get_buffer_index (vm, b);
260 vlib_buffer_copy_template (b, bt);
261 vlib_buffer_pool_put (vm, bt->buffer_pool_index, &bi, 1);
267 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue_no_cache) (struct rte_mempool * cmp,
268 void *const *obj_table,
271 vlib_main_t *vm = vlib_get_main ();
273 struct rte_mempool *mp;
274 mp = dpdk_mempool_by_buffer_pool_index[cmp->pool_id];
275 u8 buffer_pool_index = cmp->pool_id;
276 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
277 vlib_buffer_copy_template (&bt, &bp->buffer_template);
281 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
282 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[1], &bt);
283 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[2], &bt);
284 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[3], &bt);
291 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
299 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue_no_cache);
302 CLIB_MULTIARCH_FN (dpdk_ops_vpp_dequeue) (struct rte_mempool * mp,
303 void **obj_table, unsigned n)
305 const int batch_size = 32;
306 vlib_main_t *vm = vlib_get_main ();
307 u32 bufs[batch_size], total = 0, n_alloc = 0;
308 u8 buffer_pool_index = mp->pool_id;
309 void **obj = obj_table;
311 while (n >= batch_size)
313 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, batch_size,
315 if (n_alloc != batch_size)
318 vlib_get_buffers_with_offset (vm, bufs, obj, batch_size,
319 -(i32) sizeof (struct rte_mbuf));
327 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, n, buffer_pool_index);
332 vlib_get_buffers_with_offset (vm, bufs, obj, n,
333 -(i32) sizeof (struct rte_mbuf));
339 /* dpdk doesn't support partial alloc, so we need to return what we
342 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n_alloc);
346 vlib_get_buffer_indices_with_offset (vm, obj, bufs, batch_size,
347 sizeof (struct rte_mbuf));
348 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
356 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_dequeue);
358 #ifndef CLIB_MARCH_VARIANT
361 dpdk_ops_vpp_dequeue_no_cache (struct rte_mempool *mp, void **obj_table,
369 dpdk_ops_vpp_get_count (const struct rte_mempool *mp)
376 dpdk_ops_vpp_get_count_no_cache (const struct rte_mempool *mp)
378 struct rte_mempool *cmp;
379 cmp = dpdk_no_cache_mempool_by_buffer_pool_index[mp->pool_id];
380 return dpdk_ops_vpp_get_count (cmp);
384 dpdk_buffer_pools_create (vlib_main_t * vm)
387 vlib_buffer_pool_t *bp;
389 struct rte_mempool_ops ops = { };
391 strncpy (ops.name, "vpp", 4);
392 ops.alloc = dpdk_ops_vpp_alloc;
393 ops.free = dpdk_ops_vpp_free;
394 ops.get_count = dpdk_ops_vpp_get_count;
395 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue);
396 ops.dequeue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_dequeue);
397 rte_mempool_register_ops (&ops);
399 strncpy (ops.name, "vpp-no-cache", 13);
400 ops.get_count = dpdk_ops_vpp_get_count_no_cache;
401 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue_no_cache);
402 ops.dequeue = dpdk_ops_vpp_dequeue_no_cache;
403 rte_mempool_register_ops (&ops);
406 vec_foreach (bp, vm->buffer_main->buffer_pools)
407 if (bp->start && (err = dpdk_buffer_pool_init (vm, bp)))
413 VLIB_BUFFER_SET_EXT_HDR_SIZE (sizeof (struct rte_mempool_objhdr) +
414 sizeof (struct rte_mbuf));
420 * fd.io coding-style-patch-verification: ON
423 * eval: (c-set-style "gnu")