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 memset (&priv, 0, sizeof (priv));
95 priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
96 vlib_buffer_get_default_data_size (vm);
97 priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
98 rte_pktmbuf_pool_init (mp, &priv);
99 rte_pktmbuf_pool_init (nmp, &priv);
101 iova_mode = rte_eal_iova_mode ();
103 /* populate mempool object buffer header */
104 for (i = 0; i < bp->n_buffers; i++)
106 struct rte_mempool_objhdr *hdr;
107 vlib_buffer_t *b = vlib_get_buffer (vm, bp->buffers[i]);
108 struct rte_mbuf *mb = rte_mbuf_from_vlib_buffer (b);
109 hdr = (struct rte_mempool_objhdr *) RTE_PTR_SUB (mb, sizeof (*hdr));
111 hdr->iova = (iova_mode == RTE_IOVA_VA) ?
112 pointer_to_uword (mb) : vlib_physmem_get_pa (vm, mb);
113 STAILQ_INSERT_TAIL (&mp->elt_list, hdr, next);
114 STAILQ_INSERT_TAIL (&nmp->elt_list, hdr, next);
115 mp->populated_size++;
116 nmp->populated_size++;
119 /* call the object initializers */
120 rte_mempool_obj_iter (mp, rte_pktmbuf_init, 0);
122 /* create mbuf header tempate from the first buffer in the pool */
123 vec_validate_aligned (dpdk_mbuf_template_by_pool_index, bp->index,
124 CLIB_CACHE_LINE_BYTES);
125 clib_memcpy (vec_elt_at_index (dpdk_mbuf_template_by_pool_index, bp->index),
126 rte_mbuf_from_vlib_buffer (vlib_buffer_ptr_from_index
127 (buffer_mem_start, *bp->buffers,
128 0)), sizeof (struct rte_mbuf));
130 for (i = 0; i < bp->n_buffers; i++)
133 b = vlib_buffer_ptr_from_index (buffer_mem_start, bp->buffers[i], 0);
134 vlib_buffer_copy_template (b, &bp->buffer_template);
137 /* map DMA pages if at least one physical device exists */
138 if (rte_eth_dev_count_avail ())
142 vlib_physmem_map_t *pm;
145 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
146 page_sz = 1ULL << pm->log2_page_size;
148 for (i = 0; i < pm->n_pages; i++)
150 char *va = ((char *) pm->base) + i * page_sz;
151 uword pa = (iova_mode == RTE_IOVA_VA) ?
152 pointer_to_uword (va) : pm->page_table[i];
155 #if RTE_VERSION < RTE_VERSION_NUM(19, 11, 0, 0)
156 rte_vfio_dma_map (pointer_to_uword (va), pa, page_sz))
158 rte_vfio_container_dma_map (RTE_VFIO_DEFAULT_CONTAINER_FD,
159 pointer_to_uword (va), pa, page_sz))
163 struct rte_mempool_memhdr *memhdr;
164 memhdr = clib_mem_alloc (sizeof (*memhdr));
168 memhdr->len = page_sz;
172 STAILQ_INSERT_TAIL (&mp->mem_list, memhdr, next);
181 dpdk_ops_vpp_alloc (struct rte_mempool *mp)
188 dpdk_ops_vpp_free (struct rte_mempool *mp)
195 static_always_inline void
196 dpdk_ops_vpp_enqueue_one (vlib_buffer_t * bt, void *obj)
198 /* Only non-replicated packets (b->ref_count == 1) expected */
200 struct rte_mbuf *mb = obj;
201 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
202 ASSERT (b->ref_count == 1);
203 ASSERT (b->buffer_pool_index == bt->buffer_pool_index);
204 vlib_buffer_copy_template (b, bt);
208 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue) (struct rte_mempool * mp,
209 void *const *obj_table, unsigned n)
211 const int batch_size = 32;
212 vlib_main_t *vm = vlib_get_main ();
214 u8 buffer_pool_index = mp->pool_id;
215 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
216 u32 bufs[batch_size];
218 void *const *obj = obj_table;
220 vlib_buffer_copy_template (&bt, &bp->buffer_template);
224 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
225 dpdk_ops_vpp_enqueue_one (&bt, obj[1]);
226 dpdk_ops_vpp_enqueue_one (&bt, obj[2]);
227 dpdk_ops_vpp_enqueue_one (&bt, obj[3]);
234 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
239 while (n >= batch_size)
241 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
243 sizeof (struct rte_mbuf));
244 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
246 obj_table += batch_size;
251 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
252 n, sizeof (struct rte_mbuf));
253 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n);
259 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue);
261 static_always_inline void
262 dpdk_ops_vpp_enqueue_no_cache_one (vlib_main_t * vm, struct rte_mempool *old,
263 struct rte_mempool *new, void *obj,
266 struct rte_mbuf *mb = obj;
267 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
269 if (clib_atomic_sub_fetch (&b->ref_count, 1) == 0)
271 u32 bi = vlib_get_buffer_index (vm, b);
272 vlib_buffer_copy_template (b, bt);
273 vlib_buffer_pool_put (vm, bt->buffer_pool_index, &bi, 1);
279 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue_no_cache) (struct rte_mempool * cmp,
280 void *const *obj_table,
283 vlib_main_t *vm = vlib_get_main ();
285 struct rte_mempool *mp;
286 mp = dpdk_mempool_by_buffer_pool_index[cmp->pool_id];
287 u8 buffer_pool_index = cmp->pool_id;
288 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
289 vlib_buffer_copy_template (&bt, &bp->buffer_template);
293 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
294 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[1], &bt);
295 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[2], &bt);
296 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[3], &bt);
303 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
311 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue_no_cache);
313 static_always_inline void
314 dpdk_mbuf_init_from_template (struct rte_mbuf **mba, struct rte_mbuf *mt,
317 /* Assumptions about rte_mbuf layout */
318 STATIC_ASSERT_OFFSET_OF (struct rte_mbuf, buf_addr, 0);
319 STATIC_ASSERT_OFFSET_OF (struct rte_mbuf, buf_iova, 8);
320 STATIC_ASSERT_SIZEOF_ELT (struct rte_mbuf, buf_iova, 8);
321 STATIC_ASSERT_SIZEOF_ELT (struct rte_mbuf, buf_iova, 8);
322 STATIC_ASSERT_SIZEOF (struct rte_mbuf, 128);
326 struct rte_mbuf *mb = mba[0];
328 /* bytes 0 .. 15 hold buf_addr and buf_iova which we need to preserve */
329 /* copy bytes 16 .. 31 */
330 *((u8x16 *) mb + 1) = *((u8x16 *) mt + 1);
332 /* copy bytes 32 .. 127 */
333 #ifdef CLIB_HAVE_VEC256
334 for (i = 1; i < 4; i++)
335 *((u8x32 *) mb + i) = *((u8x32 *) mt + i);
337 for (i = 2; i < 8; i++)
338 *((u8x16 *) mb + i) = *((u8x16 *) mt + i);
345 CLIB_MULTIARCH_FN (dpdk_ops_vpp_dequeue) (struct rte_mempool * mp,
346 void **obj_table, unsigned n)
348 const int batch_size = 32;
349 vlib_main_t *vm = vlib_get_main ();
350 u32 bufs[batch_size], total = 0, n_alloc = 0;
351 u8 buffer_pool_index = mp->pool_id;
352 void **obj = obj_table;
353 struct rte_mbuf t = dpdk_mbuf_template_by_pool_index[buffer_pool_index];
355 while (n >= batch_size)
357 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, batch_size,
359 if (n_alloc != batch_size)
362 vlib_get_buffers_with_offset (vm, bufs, obj, batch_size,
363 -(i32) sizeof (struct rte_mbuf));
364 dpdk_mbuf_init_from_template ((struct rte_mbuf **) obj, &t, batch_size);
372 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, n, buffer_pool_index);
377 vlib_get_buffers_with_offset (vm, bufs, obj, n,
378 -(i32) sizeof (struct rte_mbuf));
379 dpdk_mbuf_init_from_template ((struct rte_mbuf **) obj, &t, n);
385 /* dpdk doesn't support partial alloc, so we need to return what we
388 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n_alloc);
392 vlib_get_buffer_indices_with_offset (vm, obj, bufs, batch_size,
393 sizeof (struct rte_mbuf));
394 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
402 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_dequeue);
404 #ifndef CLIB_MARCH_VARIANT
407 dpdk_ops_vpp_dequeue_no_cache (struct rte_mempool *mp, void **obj_table,
415 dpdk_ops_vpp_get_count (const struct rte_mempool *mp)
422 dpdk_ops_vpp_get_count_no_cache (const struct rte_mempool *mp)
424 struct rte_mempool *cmp;
425 cmp = dpdk_no_cache_mempool_by_buffer_pool_index[mp->pool_id];
426 return dpdk_ops_vpp_get_count (cmp);
430 dpdk_buffer_pools_create (vlib_main_t * vm)
433 vlib_buffer_pool_t *bp;
435 struct rte_mempool_ops ops = { };
437 strncpy (ops.name, "vpp", 4);
438 ops.alloc = dpdk_ops_vpp_alloc;
439 ops.free = dpdk_ops_vpp_free;
440 ops.get_count = dpdk_ops_vpp_get_count;
441 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue);
442 ops.dequeue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_dequeue);
443 rte_mempool_register_ops (&ops);
445 strncpy (ops.name, "vpp-no-cache", 13);
446 ops.get_count = dpdk_ops_vpp_get_count_no_cache;
447 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue_no_cache);
448 ops.dequeue = dpdk_ops_vpp_dequeue_no_cache;
449 rte_mempool_register_ops (&ops);
452 vec_foreach (bp, vm->buffer_main->buffer_pools)
453 if (bp->start && (err = dpdk_buffer_pool_init (vm, bp)))
459 VLIB_BUFFER_SET_EXT_HDR_SIZE (sizeof (struct rte_mempool_objhdr) +
460 sizeof (struct rte_mbuf));
466 * fd.io coding-style-patch-verification: ON
469 * eval: (c-set-style "gnu")