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");
34 struct rte_pktmbuf_pool_private mbp_priv;
36 } dpdk_mempool_private_t;
38 #ifndef CLIB_MARCH_VARIANT
39 struct rte_mempool **dpdk_mempool_by_buffer_pool_index = 0;
40 struct rte_mempool **dpdk_no_cache_mempool_by_buffer_pool_index = 0;
43 dpdk_buffer_pool_init (vlib_main_t * vm, vlib_buffer_pool_t * bp)
45 struct rte_mempool *mp, *nmp;
46 dpdk_mempool_private_t priv;
47 enum rte_iova_mode iova_mode;
52 sizeof (struct rte_mbuf) + sizeof (vlib_buffer_t) + bp->data_size;
54 /* create empty mempools */
55 vec_validate_aligned (dpdk_mempool_by_buffer_pool_index, bp->index,
56 CLIB_CACHE_LINE_BYTES);
57 vec_validate_aligned (dpdk_no_cache_mempool_by_buffer_pool_index, bp->index,
58 CLIB_CACHE_LINE_BYTES);
61 name = format (name, "vpp pool %u%c", bp->index, 0);
62 mp = rte_mempool_create_empty ((char *) name, vec_len (bp->buffers),
63 elt_size, 512, sizeof (priv),
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 dpdk_mempool_by_buffer_pool_index[bp->index] = mp;
75 dpdk_no_cache_mempool_by_buffer_pool_index[bp->index] = nmp;
77 rte_mempool_set_ops_byname (mp, "vpp", NULL);
78 rte_mempool_set_ops_byname (nmp, "vpp-no-cache", NULL);
80 /* Call the mempool priv initializer */
81 priv.mbp_priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
82 VLIB_BUFFER_DATA_SIZE;
83 priv.mbp_priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
84 priv.buffer_pool_index = bp->index;
85 rte_pktmbuf_pool_init (mp, &priv);
86 rte_pktmbuf_pool_init (nmp, &priv);
88 iova_mode = rte_eal_iova_mode ();
90 /* populate mempool object buffer header */
91 vec_foreach (bi, bp->buffers)
93 struct rte_mempool_objhdr *hdr;
94 vlib_buffer_t *b = vlib_get_buffer (vm, *bi);
95 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer (b);
96 hdr = (struct rte_mempool_objhdr *) RTE_PTR_SUB (mb, sizeof (*hdr));
98 hdr->iova = (iova_mode == RTE_IOVA_VA) ?
99 pointer_to_uword (mb) : vlib_physmem_get_pa (vm, mb);
100 STAILQ_INSERT_TAIL (&mp->elt_list, hdr, next);
101 STAILQ_INSERT_TAIL (&nmp->elt_list, hdr, next);
102 mp->populated_size++;
103 nmp->populated_size++;
106 /* call the object initializers */
107 rte_mempool_obj_iter (mp, rte_pktmbuf_init, 0);
109 /* map DMA pages if at least one physical device exists */
110 if (rte_eth_dev_count_avail ())
114 vlib_physmem_map_t *pm;
116 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
117 page_sz = 1ULL << pm->log2_page_size;
119 for (i = 0; i < pm->n_pages; i++)
121 char *va = ((char *) pm->base) + i * page_sz;
122 uword pa = (iova_mode == RTE_IOVA_VA) ?
123 pointer_to_uword (va) : pm->page_table[i];
125 if (rte_vfio_dma_map (pointer_to_uword (va), pa, page_sz))
134 dpdk_ops_vpp_alloc (struct rte_mempool *mp)
141 dpdk_ops_vpp_free (struct rte_mempool *mp)
148 static_always_inline void
149 dpdk_ops_vpp_enqueue_one (vlib_buffer_t * bt, void *obj)
151 /* Only non-replicated packets (b->ref_count == 1) expected */
153 struct rte_mbuf *mb = obj;
154 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
155 ASSERT (b->ref_count == 1);
156 ASSERT (b->buffer_pool_index == bt->buffer_pool_index);
157 vlib_buffer_copy_template (b, bt);
161 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue) (struct rte_mempool * mp,
162 void *const *obj_table, unsigned n)
164 const int batch_size = 32;
165 vlib_main_t *vm = vlib_get_main ();
167 dpdk_mempool_private_t *privp = rte_mempool_get_priv (mp);
168 u8 buffer_pool_index = privp->buffer_pool_index;
169 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
170 u32 bufs[batch_size];
172 void *const *obj = obj_table;
174 vlib_buffer_copy_template (&bt, &bp->buffer_template);
178 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
179 dpdk_ops_vpp_enqueue_one (&bt, obj[1]);
180 dpdk_ops_vpp_enqueue_one (&bt, obj[2]);
181 dpdk_ops_vpp_enqueue_one (&bt, obj[3]);
188 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
193 while (n >= batch_size)
195 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
197 sizeof (struct rte_mbuf));
198 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
200 obj_table += batch_size;
205 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
206 n, sizeof (struct rte_mbuf));
207 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
213 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue);
215 static_always_inline void
216 dpdk_ops_vpp_enqueue_no_cache_one (vlib_main_t * vm, struct rte_mempool *old,
217 struct rte_mempool *new, void *obj,
220 struct rte_mbuf *mb = obj;
221 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
223 if (clib_atomic_sub_fetch (&b->ref_count, 1) == 0)
225 u32 bi = vlib_get_buffer_index (vm, b);
227 vlib_buffer_copy_template (b, bt);
228 vlib_buffer_pool_put (vm, bt->buffer_pool_index, &bi, 1);
234 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue_no_cache) (struct rte_mempool * cmp,
235 void *const *obj_table,
238 vlib_main_t *vm = vlib_get_main ();
240 dpdk_mempool_private_t *privp = rte_mempool_get_priv (cmp);
241 struct rte_mempool *mp;
242 mp = dpdk_mempool_by_buffer_pool_index[privp->buffer_pool_index];
243 u8 buffer_pool_index = privp->buffer_pool_index;
244 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
245 vlib_buffer_copy_template (&bt, &bp->buffer_template);
249 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
250 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[1], &bt);
251 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[2], &bt);
252 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[3], &bt);
259 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
267 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue_no_cache);
270 CLIB_MULTIARCH_FN (dpdk_ops_vpp_dequeue) (struct rte_mempool * mp,
271 void **obj_table, unsigned n)
273 const int batch_size = 32;
274 vlib_main_t *vm = vlib_get_main ();
275 u32 bufs[batch_size], total = 0, n_alloc = 0;
276 dpdk_mempool_private_t *privp = rte_mempool_get_priv (mp);
277 u8 buffer_pool_index = privp->buffer_pool_index;
278 void **obj = obj_table;
280 while (n >= batch_size)
282 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, batch_size,
284 if (n_alloc != batch_size)
287 vlib_get_buffers_with_offset (vm, bufs, obj, batch_size,
288 -(i32) sizeof (struct rte_mbuf));
296 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, n, buffer_pool_index);
301 vlib_get_buffers_with_offset (vm, bufs, obj, n,
302 -(i32) sizeof (struct rte_mbuf));
308 /* dpdk doesn't support partial alloc, so we need to return what we
311 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n_alloc);
315 vlib_get_buffer_indices_with_offset (vm, obj, bufs, batch_size,
316 sizeof (struct rte_mbuf));
317 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
325 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_dequeue);
327 #ifndef CLIB_MARCH_VARIANT
330 dpdk_ops_vpp_dequeue_no_cache (struct rte_mempool *mp, void **obj_table,
338 dpdk_ops_vpp_get_count (const struct rte_mempool *mp)
345 dpdk_ops_vpp_get_count_no_cache (const struct rte_mempool *mp)
347 dpdk_mempool_private_t *privp;
348 struct rte_mempool *cmp;
349 privp = rte_mempool_get_priv ((struct rte_mempool *) mp);
350 cmp = dpdk_no_cache_mempool_by_buffer_pool_index[privp->buffer_pool_index];
351 return dpdk_ops_vpp_get_count (cmp);
355 dpdk_buffer_pools_create (vlib_main_t * vm)
358 vlib_buffer_pool_t *bp;
360 struct rte_mempool_ops ops = { };
362 strncpy (ops.name, "vpp", 4);
363 ops.alloc = dpdk_ops_vpp_alloc;
364 ops.free = dpdk_ops_vpp_free;
365 ops.get_count = dpdk_ops_vpp_get_count;
366 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue);
367 ops.dequeue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_dequeue);
368 rte_mempool_register_ops (&ops);
370 strncpy (ops.name, "vpp-no-cache", 13);
371 ops.get_count = dpdk_ops_vpp_get_count_no_cache;
372 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue_no_cache);
373 ops.dequeue = dpdk_ops_vpp_dequeue_no_cache;
374 rte_mempool_register_ops (&ops);
377 vec_foreach (bp, vm->buffer_main->buffer_pools)
378 if (bp->start && (err = dpdk_buffer_pool_init (vm, bp)))
384 VLIB_BUFFER_SET_EXT_HDR_SIZE (sizeof (struct rte_mempool_objhdr) +
385 sizeof (struct rte_mbuf));
391 * fd.io coding-style-patch-verification: ON
394 * eval: (c-set-style "gnu")