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),
58 vec_reset_length (name);
60 /* non-cached mempool */
61 name = format (name, "vpp pool %u (no cache)%c", bp->index, 0);
62 nmp = rte_mempool_create_empty ((char *) name, vec_len (bp->buffers),
63 elt_size, 0, sizeof (priv),
67 dpdk_mempool_by_buffer_pool_index[bp->index] = mp;
68 dpdk_no_cache_mempool_by_buffer_pool_index[bp->index] = nmp;
70 mp->pool_id = nmp->pool_id = bp->index;
72 rte_mempool_set_ops_byname (mp, "vpp", NULL);
73 rte_mempool_set_ops_byname (nmp, "vpp-no-cache", NULL);
75 /* Call the mempool priv initializer */
76 priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
77 vlib_buffer_get_default_data_size (vm);
78 priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
79 rte_pktmbuf_pool_init (mp, &priv);
80 rte_pktmbuf_pool_init (nmp, &priv);
82 iova_mode = rte_eal_iova_mode ();
84 /* populate mempool object buffer header */
86 vec_foreach (bi, bp->buffers)
88 struct rte_mempool_objhdr *hdr;
89 vlib_buffer_t *b = vlib_get_buffer (vm, *bi);
90 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer (b);
91 hdr = (struct rte_mempool_objhdr *) RTE_PTR_SUB (mb, sizeof (*hdr));
93 hdr->iova = (iova_mode == RTE_IOVA_VA) ?
94 pointer_to_uword (mb) : vlib_physmem_get_pa (vm, mb);
95 STAILQ_INSERT_TAIL (&mp->elt_list, hdr, next);
96 STAILQ_INSERT_TAIL (&nmp->elt_list, hdr, next);
98 nmp->populated_size++;
102 /* call the object initializers */
103 rte_mempool_obj_iter (mp, rte_pktmbuf_init, 0);
106 vec_foreach (bi, bp->buffers)
109 b = vlib_buffer_ptr_from_index (buffer_mem_start, *bi, 0);
110 vlib_buffer_copy_template (b, &bp->buffer_template);
114 /* map DMA pages if at least one physical device exists */
115 if (rte_eth_dev_count_avail ())
119 vlib_physmem_map_t *pm;
122 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
123 page_sz = 1ULL << pm->log2_page_size;
125 for (i = 0; i < pm->n_pages; i++)
127 char *va = ((char *) pm->base) + i * page_sz;
128 uword pa = (iova_mode == RTE_IOVA_VA) ?
129 pointer_to_uword (va) : pm->page_table[i];
132 rte_vfio_dma_map (pointer_to_uword (va), pa, page_sz))
135 struct rte_mempool_memhdr *memhdr;
136 memhdr = clib_mem_alloc (sizeof (*memhdr));
140 memhdr->len = page_sz;
144 STAILQ_INSERT_TAIL (&mp->mem_list, memhdr, next);
153 dpdk_ops_vpp_alloc (struct rte_mempool *mp)
160 dpdk_ops_vpp_free (struct rte_mempool *mp)
167 static_always_inline void
168 dpdk_ops_vpp_enqueue_one (vlib_buffer_t * bt, void *obj)
170 /* Only non-replicated packets (b->ref_count == 1) expected */
172 struct rte_mbuf *mb = obj;
173 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
174 ASSERT (b->ref_count == 1);
175 ASSERT (b->buffer_pool_index == bt->buffer_pool_index);
176 vlib_buffer_copy_template (b, bt);
180 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue) (struct rte_mempool * mp,
181 void *const *obj_table, unsigned n)
183 const int batch_size = 32;
184 vlib_main_t *vm = vlib_get_main ();
186 u8 buffer_pool_index = mp->pool_id;
187 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
188 u32 bufs[batch_size];
190 void *const *obj = obj_table;
192 vlib_buffer_copy_template (&bt, &bp->buffer_template);
196 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
197 dpdk_ops_vpp_enqueue_one (&bt, obj[1]);
198 dpdk_ops_vpp_enqueue_one (&bt, obj[2]);
199 dpdk_ops_vpp_enqueue_one (&bt, obj[3]);
206 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
211 while (n >= batch_size)
213 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
215 sizeof (struct rte_mbuf));
216 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
218 obj_table += batch_size;
223 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
224 n, sizeof (struct rte_mbuf));
225 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n);
231 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue);
233 static_always_inline void
234 dpdk_ops_vpp_enqueue_no_cache_one (vlib_main_t * vm, struct rte_mempool *old,
235 struct rte_mempool *new, void *obj,
238 struct rte_mbuf *mb = obj;
239 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
241 if (clib_atomic_sub_fetch (&b->ref_count, 1) == 0)
243 u32 bi = vlib_get_buffer_index (vm, b);
245 vlib_buffer_copy_template (b, bt);
246 vlib_buffer_pool_put (vm, bt->buffer_pool_index, &bi, 1);
252 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue_no_cache) (struct rte_mempool * cmp,
253 void *const *obj_table,
256 vlib_main_t *vm = vlib_get_main ();
258 struct rte_mempool *mp;
259 mp = dpdk_mempool_by_buffer_pool_index[cmp->pool_id];
260 u8 buffer_pool_index = cmp->pool_id;
261 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
262 vlib_buffer_copy_template (&bt, &bp->buffer_template);
266 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
267 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[1], &bt);
268 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[2], &bt);
269 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[3], &bt);
276 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
284 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue_no_cache);
287 CLIB_MULTIARCH_FN (dpdk_ops_vpp_dequeue) (struct rte_mempool * mp,
288 void **obj_table, unsigned n)
290 const int batch_size = 32;
291 vlib_main_t *vm = vlib_get_main ();
292 u32 bufs[batch_size], total = 0, n_alloc = 0;
293 u8 buffer_pool_index = mp->pool_id;
294 void **obj = obj_table;
296 while (n >= batch_size)
298 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, batch_size,
300 if (n_alloc != batch_size)
303 vlib_get_buffers_with_offset (vm, bufs, obj, batch_size,
304 -(i32) sizeof (struct rte_mbuf));
312 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, n, buffer_pool_index);
317 vlib_get_buffers_with_offset (vm, bufs, obj, n,
318 -(i32) sizeof (struct rte_mbuf));
324 /* dpdk doesn't support partial alloc, so we need to return what we
327 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n_alloc);
331 vlib_get_buffer_indices_with_offset (vm, obj, bufs, batch_size,
332 sizeof (struct rte_mbuf));
333 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
341 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_dequeue);
343 #ifndef CLIB_MARCH_VARIANT
346 dpdk_ops_vpp_dequeue_no_cache (struct rte_mempool *mp, void **obj_table,
354 dpdk_ops_vpp_get_count (const struct rte_mempool *mp)
361 dpdk_ops_vpp_get_count_no_cache (const struct rte_mempool *mp)
363 struct rte_mempool *cmp;
364 cmp = dpdk_no_cache_mempool_by_buffer_pool_index[mp->pool_id];
365 return dpdk_ops_vpp_get_count (cmp);
369 dpdk_buffer_pools_create (vlib_main_t * vm)
372 vlib_buffer_pool_t *bp;
374 struct rte_mempool_ops ops = { };
376 strncpy (ops.name, "vpp", 4);
377 ops.alloc = dpdk_ops_vpp_alloc;
378 ops.free = dpdk_ops_vpp_free;
379 ops.get_count = dpdk_ops_vpp_get_count;
380 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue);
381 ops.dequeue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_dequeue);
382 rte_mempool_register_ops (&ops);
384 strncpy (ops.name, "vpp-no-cache", 13);
385 ops.get_count = dpdk_ops_vpp_get_count_no_cache;
386 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue_no_cache);
387 ops.dequeue = dpdk_ops_vpp_dequeue_no_cache;
388 rte_mempool_register_ops (&ops);
391 vec_foreach (bp, vm->buffer_main->buffer_pools)
392 if (bp->start && (err = dpdk_buffer_pool_init (vm, bp)))
398 VLIB_BUFFER_SET_EXT_HDR_SIZE (sizeof (struct rte_mempool_objhdr) +
399 sizeof (struct rte_mbuf));
405 * fd.io coding-style-patch-verification: ON
408 * eval: (c-set-style "gnu")