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 extern struct rte_mbuf *dpdk_mbuf_template_by_pool_index;
31 #ifndef CLIB_MARCH_VARIANT
32 struct rte_mempool **dpdk_mempool_by_buffer_pool_index = 0;
33 struct rte_mempool **dpdk_no_cache_mempool_by_buffer_pool_index = 0;
34 struct rte_mbuf *dpdk_mbuf_template_by_pool_index = 0;
37 dpdk_buffer_pool_init (vlib_main_t * vm, vlib_buffer_pool_t * bp)
39 uword buffer_mem_start = vm->buffer_main->buffer_mem_start;
40 struct rte_mempool *mp, *nmp;
41 struct rte_pktmbuf_pool_private priv;
42 enum rte_iova_mode iova_mode;
47 sizeof (struct rte_mbuf) + sizeof (vlib_buffer_t) + bp->data_size;
49 /* create empty mempools */
50 vec_validate_aligned (dpdk_mempool_by_buffer_pool_index, bp->index,
51 CLIB_CACHE_LINE_BYTES);
52 vec_validate_aligned (dpdk_no_cache_mempool_by_buffer_pool_index, bp->index,
53 CLIB_CACHE_LINE_BYTES);
56 name = format (name, "vpp pool %u%c", bp->index, 0);
57 mp = rte_mempool_create_empty ((char *) name, vec_len (bp->buffers),
58 elt_size, 512, sizeof (priv),
63 return clib_error_return (0,
64 "failed to create normal mempool for numa node %u",
67 vec_reset_length (name);
69 /* non-cached mempool */
70 name = format (name, "vpp pool %u (no cache)%c", bp->index, 0);
71 nmp = rte_mempool_create_empty ((char *) name, vec_len (bp->buffers),
72 elt_size, 0, sizeof (priv),
76 rte_mempool_free (mp);
78 return clib_error_return (0,
79 "failed to create non-cache mempool for numa nude %u",
84 dpdk_mempool_by_buffer_pool_index[bp->index] = mp;
85 dpdk_no_cache_mempool_by_buffer_pool_index[bp->index] = nmp;
87 mp->pool_id = nmp->pool_id = bp->index;
89 rte_mempool_set_ops_byname (mp, "vpp", NULL);
90 rte_mempool_set_ops_byname (nmp, "vpp-no-cache", NULL);
92 /* Call the mempool priv initializer */
93 priv.mbuf_data_room_size = VLIB_BUFFER_PRE_DATA_SIZE +
94 vlib_buffer_get_default_data_size (vm);
95 priv.mbuf_priv_size = VLIB_BUFFER_HDR_SIZE;
96 rte_pktmbuf_pool_init (mp, &priv);
97 rte_pktmbuf_pool_init (nmp, &priv);
99 iova_mode = rte_eal_iova_mode ();
101 /* populate mempool object buffer header */
103 vec_foreach (bi, bp->buffers)
105 struct rte_mempool_objhdr *hdr;
106 vlib_buffer_t *b = vlib_get_buffer (vm, *bi);
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++;
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));
131 vec_foreach (bi, bp->buffers)
134 b = vlib_buffer_ptr_from_index (buffer_mem_start, *bi, 0);
135 vlib_buffer_copy_template (b, &bp->buffer_template);
139 /* map DMA pages if at least one physical device exists */
140 if (rte_eth_dev_count_avail ())
144 vlib_physmem_map_t *pm;
147 pm = vlib_physmem_get_map (vm, bp->physmem_map_index);
148 page_sz = 1ULL << pm->log2_page_size;
150 for (i = 0; i < pm->n_pages; i++)
152 char *va = ((char *) pm->base) + i * page_sz;
153 uword pa = (iova_mode == RTE_IOVA_VA) ?
154 pointer_to_uword (va) : pm->page_table[i];
157 rte_vfio_dma_map (pointer_to_uword (va), pa, page_sz))
160 struct rte_mempool_memhdr *memhdr;
161 memhdr = clib_mem_alloc (sizeof (*memhdr));
165 memhdr->len = page_sz;
169 STAILQ_INSERT_TAIL (&mp->mem_list, memhdr, next);
178 dpdk_ops_vpp_alloc (struct rte_mempool *mp)
185 dpdk_ops_vpp_free (struct rte_mempool *mp)
192 static_always_inline void
193 dpdk_ops_vpp_enqueue_one (vlib_buffer_t * bt, void *obj)
195 /* Only non-replicated packets (b->ref_count == 1) expected */
197 struct rte_mbuf *mb = obj;
198 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
199 ASSERT (b->ref_count == 1);
200 ASSERT (b->buffer_pool_index == bt->buffer_pool_index);
201 vlib_buffer_copy_template (b, bt);
205 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue) (struct rte_mempool * mp,
206 void *const *obj_table, unsigned n)
208 const int batch_size = 32;
209 vlib_main_t *vm = vlib_get_main ();
211 u8 buffer_pool_index = mp->pool_id;
212 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
213 u32 bufs[batch_size];
215 void *const *obj = obj_table;
217 vlib_buffer_copy_template (&bt, &bp->buffer_template);
221 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
222 dpdk_ops_vpp_enqueue_one (&bt, obj[1]);
223 dpdk_ops_vpp_enqueue_one (&bt, obj[2]);
224 dpdk_ops_vpp_enqueue_one (&bt, obj[3]);
231 dpdk_ops_vpp_enqueue_one (&bt, obj[0]);
236 while (n >= batch_size)
238 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
240 sizeof (struct rte_mbuf));
241 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
243 obj_table += batch_size;
248 vlib_get_buffer_indices_with_offset (vm, (void **) obj_table, bufs,
249 n, sizeof (struct rte_mbuf));
250 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n);
256 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue);
258 static_always_inline void
259 dpdk_ops_vpp_enqueue_no_cache_one (vlib_main_t * vm, struct rte_mempool *old,
260 struct rte_mempool *new, void *obj,
263 struct rte_mbuf *mb = obj;
264 vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
266 if (clib_atomic_sub_fetch (&b->ref_count, 1) == 0)
268 u32 bi = vlib_get_buffer_index (vm, b);
269 vlib_buffer_copy_template (b, bt);
270 vlib_buffer_pool_put (vm, bt->buffer_pool_index, &bi, 1);
276 CLIB_MULTIARCH_FN (dpdk_ops_vpp_enqueue_no_cache) (struct rte_mempool * cmp,
277 void *const *obj_table,
280 vlib_main_t *vm = vlib_get_main ();
282 struct rte_mempool *mp;
283 mp = dpdk_mempool_by_buffer_pool_index[cmp->pool_id];
284 u8 buffer_pool_index = cmp->pool_id;
285 vlib_buffer_pool_t *bp = vlib_get_buffer_pool (vm, buffer_pool_index);
286 vlib_buffer_copy_template (&bt, &bp->buffer_template);
290 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
291 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[1], &bt);
292 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[2], &bt);
293 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[3], &bt);
300 dpdk_ops_vpp_enqueue_no_cache_one (vm, cmp, mp, obj_table[0], &bt);
308 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_enqueue_no_cache);
310 static_always_inline void
311 dpdk_mbuf_init_from_template (struct rte_mbuf **mba, struct rte_mbuf *mt,
314 /* Assumptions about rte_mbuf layout */
315 STATIC_ASSERT_OFFSET_OF (struct rte_mbuf, buf_addr, 0);
316 STATIC_ASSERT_OFFSET_OF (struct rte_mbuf, buf_iova, 8);
317 STATIC_ASSERT_SIZEOF_ELT (struct rte_mbuf, buf_iova, 8);
318 STATIC_ASSERT_SIZEOF_ELT (struct rte_mbuf, buf_iova, 8);
319 STATIC_ASSERT_SIZEOF (struct rte_mbuf, 128);
323 struct rte_mbuf *mb = mba[0];
325 /* bytes 0 .. 15 hold buf_addr and buf_iova which we need to preserve */
326 /* copy bytes 16 .. 31 */
327 *((u8x16 *) mb + 1) = *((u8x16 *) mt + 1);
329 /* copy bytes 32 .. 127 */
330 #ifdef CLIB_HAVE_VEC256
331 for (i = 1; i < 4; i++)
332 *((u8x32 *) mb + i) = *((u8x32 *) mt + i);
334 for (i = 2; i < 8; i++)
335 *((u8x16 *) mb + i) = *((u8x16 *) mt + i);
342 CLIB_MULTIARCH_FN (dpdk_ops_vpp_dequeue) (struct rte_mempool * mp,
343 void **obj_table, unsigned n)
345 const int batch_size = 32;
346 vlib_main_t *vm = vlib_get_main ();
347 u32 bufs[batch_size], total = 0, n_alloc = 0;
348 u8 buffer_pool_index = mp->pool_id;
349 void **obj = obj_table;
350 struct rte_mbuf t = dpdk_mbuf_template_by_pool_index[buffer_pool_index];
352 while (n >= batch_size)
354 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, batch_size,
356 if (n_alloc != batch_size)
359 vlib_get_buffers_with_offset (vm, bufs, obj, batch_size,
360 -(i32) sizeof (struct rte_mbuf));
361 dpdk_mbuf_init_from_template ((struct rte_mbuf **) obj, &t, batch_size);
369 n_alloc = vlib_buffer_alloc_from_pool (vm, bufs, n, buffer_pool_index);
374 vlib_get_buffers_with_offset (vm, bufs, obj, n,
375 -(i32) sizeof (struct rte_mbuf));
376 dpdk_mbuf_init_from_template ((struct rte_mbuf **) obj, &t, n);
382 /* dpdk doesn't support partial alloc, so we need to return what we
385 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, n_alloc);
389 vlib_get_buffer_indices_with_offset (vm, obj, bufs, batch_size,
390 sizeof (struct rte_mbuf));
391 vlib_buffer_pool_put (vm, buffer_pool_index, bufs, batch_size);
399 CLIB_MARCH_FN_REGISTRATION (dpdk_ops_vpp_dequeue);
401 #ifndef CLIB_MARCH_VARIANT
404 dpdk_ops_vpp_dequeue_no_cache (struct rte_mempool *mp, void **obj_table,
412 dpdk_ops_vpp_get_count (const struct rte_mempool *mp)
419 dpdk_ops_vpp_get_count_no_cache (const struct rte_mempool *mp)
421 struct rte_mempool *cmp;
422 cmp = dpdk_no_cache_mempool_by_buffer_pool_index[mp->pool_id];
423 return dpdk_ops_vpp_get_count (cmp);
427 dpdk_buffer_pools_create (vlib_main_t * vm)
430 vlib_buffer_pool_t *bp;
432 struct rte_mempool_ops ops = { };
434 strncpy (ops.name, "vpp", 4);
435 ops.alloc = dpdk_ops_vpp_alloc;
436 ops.free = dpdk_ops_vpp_free;
437 ops.get_count = dpdk_ops_vpp_get_count;
438 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue);
439 ops.dequeue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_dequeue);
440 rte_mempool_register_ops (&ops);
442 strncpy (ops.name, "vpp-no-cache", 13);
443 ops.get_count = dpdk_ops_vpp_get_count_no_cache;
444 ops.enqueue = CLIB_MARCH_FN_POINTER (dpdk_ops_vpp_enqueue_no_cache);
445 ops.dequeue = dpdk_ops_vpp_dequeue_no_cache;
446 rte_mempool_register_ops (&ops);
449 vec_foreach (bp, vm->buffer_main->buffer_pools)
450 if (bp->start && (err = dpdk_buffer_pool_init (vm, bp)))
456 VLIB_BUFFER_SET_EXT_HDR_SIZE (sizeof (struct rte_mempool_objhdr) +
457 sizeof (struct rte_mbuf));
463 * fd.io coding-style-patch-verification: ON
466 * eval: (c-set-style "gnu")