Branch data Line data Source code
1 : : /* SPDX-License-Identifier: BSD-3-Clause
2 : : * Copyright 2018 6WIND S.A.
3 : : * Copyright 2018 Mellanox Technologies, Ltd
4 : : */
5 : :
6 : : #ifndef RTE_PMD_MLX5_COMMON_MR_H_
7 : : #define RTE_PMD_MLX5_COMMON_MR_H_
8 : :
9 : : #include <stddef.h>
10 : : #include <stdint.h>
11 : : #include <sys/queue.h>
12 : :
13 : :
14 : : #include <rte_compat.h>
15 : : #include <rte_rwlock.h>
16 : : #include <rte_bitmap.h>
17 : : #include <rte_mbuf.h>
18 : : #include <rte_memory.h>
19 : :
20 : : #include "mlx5_glue.h"
21 : : #include "mlx5_common_mp.h"
22 : : #include "mlx5_common_defs.h"
23 : :
24 : : /* mlx5 PMD MR struct. */
25 : : struct mlx5_pmd_mr {
26 : : uint32_t lkey;
27 : : void *addr;
28 : : size_t len;
29 : : void *obj; /* verbs mr object or devx umem object. */
30 : : struct mlx5_devx_obj *mkey; /* devx mkey object. */
31 : : };
32 : :
33 : : /**
34 : : * mr operations typedef
35 : : */
36 : : typedef int (*mlx5_reg_mr_t)(void *pd, void *addr, size_t length,
37 : : struct mlx5_pmd_mr *pmd_mr);
38 : : typedef void (*mlx5_dereg_mr_t)(struct mlx5_pmd_mr *pmd_mr);
39 : :
40 : : /* Memory Region object. */
41 : : struct mlx5_mr {
42 : : LIST_ENTRY(mlx5_mr) mr; /**< Pointer to the prev/next entry. */
43 : : struct mlx5_pmd_mr pmd_mr; /* PMD memory region. */
44 : : const struct rte_memseg_list *msl;
45 : : int ms_base_idx; /* Start index of msl->memseg_arr[]. */
46 : : int ms_n; /* Number of memsegs in use. */
47 : : uint32_t ms_bmp_n; /* Number of bits in memsegs bit-mask. */
48 : : struct rte_bitmap *ms_bmp; /* Bit-mask of memsegs belonged to MR. */
49 : : };
50 : :
51 : : /* Cache entry for Memory Region. */
52 : : struct mr_cache_entry {
53 : : uintptr_t start; /* Start address of MR. */
54 : : uintptr_t end; /* End address of MR. */
55 : : uint32_t lkey; /* rte_cpu_to_be_32(lkey). */
56 : : } __rte_packed;
57 : :
58 : : /* MR Cache table for Binary search. */
59 : : struct mlx5_mr_btree {
60 : : uint32_t len; /* Number of entries. */
61 : : uint32_t size; /* Total number of entries. */
62 : : struct mr_cache_entry (*table)[];
63 : : } __rte_packed;
64 : :
65 : : struct mlx5_common_device;
66 : :
67 : : /* Per-queue MR control descriptor. */
68 : : struct mlx5_mr_ctrl {
69 : : uint32_t *dev_gen_ptr; /* Generation number of device to poll. */
70 : : uint32_t cur_gen; /* Generation number saved to flush caches. */
71 : : uint16_t mru; /* Index of last hit entry in top-half cache. */
72 : : uint16_t head; /* Index of the oldest entry in top-half cache. */
73 : : struct mr_cache_entry cache[MLX5_MR_CACHE_N]; /* Cache for top-half. */
74 : : struct mlx5_mr_btree cache_bh; /* Cache for bottom-half. */
75 : : } __rte_packed;
76 : :
77 : : LIST_HEAD(mlx5_mr_list, mlx5_mr);
78 : : LIST_HEAD(mlx5_mempool_reg_list, mlx5_mempool_reg);
79 : :
80 : : /* Global per-device MR cache. */
81 : : struct mlx5_mr_share_cache {
82 : : uint32_t dev_gen; /* Generation number to flush local caches. */
83 : : rte_rwlock_t rwlock; /* MR cache Lock. */
84 : : rte_rwlock_t mprwlock; /* Mempool Registration Lock. */
85 : : struct mlx5_mr_btree cache; /* Global MR cache table. */
86 : : struct mlx5_mr_list mr_list; /* Registered MR list. */
87 : : struct mlx5_mr_list mr_free_list; /* Freed MR list. */
88 : : struct mlx5_mempool_reg_list mempool_reg_list; /* Mempool database. */
89 : : mlx5_reg_mr_t reg_mr_cb; /* Callback to reg_mr func */
90 : : mlx5_dereg_mr_t dereg_mr_cb; /* Callback to dereg_mr func */
91 : : } __rte_packed;
92 : :
93 : : /* Multi-Packet RQ buffer header. */
94 : : struct __rte_cache_aligned mlx5_mprq_buf {
95 : : struct rte_mempool *mp;
96 : : RTE_ATOMIC(uint16_t) refcnt; /* Atomically accessed refcnt. */
97 : : struct rte_mbuf_ext_shared_info shinfos[];
98 : : /*
99 : : * Shared information per stride.
100 : : * More memory will be allocated for the first stride head-room and for
101 : : * the strides data.
102 : : */
103 : : };
104 : :
105 : : __rte_internal
106 : : void mlx5_mprq_buf_free_cb(void *addr, void *opaque);
107 : :
108 : : /**
109 : : * Get Memory Pool (MP) from mbuf. If mbuf is indirect, the pool from which the
110 : : * cloned mbuf is allocated is returned instead.
111 : : *
112 : : * @param buf
113 : : * Pointer to mbuf.
114 : : *
115 : : * @return
116 : : * Memory pool where data is located for given mbuf.
117 : : */
118 : : static inline struct rte_mempool *
119 : : mlx5_mb2mp(struct rte_mbuf *buf)
120 : : {
121 [ # # ]: 0 : if (unlikely(RTE_MBUF_CLONED(buf)))
122 : 0 : return rte_mbuf_from_indirect(buf)->pool;
123 : 0 : return buf->pool;
124 : : }
125 : :
126 : : /**
127 : : * Look up LKey from given lookup table by linear search. Firstly look up the
128 : : * last-hit entry. If miss, the entire array is searched. If found, update the
129 : : * last-hit index and return LKey.
130 : : *
131 : : * @param lkp_tbl
132 : : * Pointer to lookup table.
133 : : * @param[in,out] cached_idx
134 : : * Pointer to last-hit index.
135 : : * @param n
136 : : * Size of lookup table.
137 : : * @param addr
138 : : * Search key.
139 : : *
140 : : * @return
141 : : * Searched LKey on success, UINT32_MAX on no match.
142 : : */
143 : : static __rte_always_inline uint32_t
144 : : mlx5_mr_lookup_lkey(struct mr_cache_entry *lkp_tbl, uint16_t *cached_idx,
145 : : uint16_t n, uintptr_t addr)
146 : : {
147 : : uint16_t idx;
148 : :
149 [ # # # # : 0 : if (likely(addr >= lkp_tbl[*cached_idx].start &&
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150 : : addr < lkp_tbl[*cached_idx].end))
151 : 0 : return lkp_tbl[*cached_idx].lkey;
152 [ # # # # : 0 : for (idx = 0; idx < n && lkp_tbl[idx].start != 0; ++idx) {
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153 [ # # # # : 0 : if (addr >= lkp_tbl[idx].start &&
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154 [ # # # # : 0 : addr < lkp_tbl[idx].end) {
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155 : : /* Found. */
156 : 0 : *cached_idx = idx;
157 : 0 : return lkp_tbl[idx].lkey;
158 : : }
159 : : }
160 : : return UINT32_MAX;
161 : : }
162 : :
163 : : __rte_internal
164 : : void mlx5_mr_flush_local_cache(struct mlx5_mr_ctrl *mr_ctrl);
165 : :
166 : : /**
167 : : * Bottom-half of LKey search on. If supported, lookup for the address from
168 : : * the mempool. Otherwise, search in old mechanism caches.
169 : : *
170 : : * @param mr_ctrl
171 : : * Pointer to per-queue MR control structure.
172 : : * @param mb
173 : : * Pointer to mbuf.
174 : : *
175 : : * @return
176 : : * Searched LKey on success, UINT32_MAX on no match.
177 : : */
178 : : __rte_internal
179 : : uint32_t mlx5_mr_mb2mr_bh(struct mlx5_mr_ctrl *mr_ctrl, struct rte_mbuf *mbuf);
180 : :
181 : : /**
182 : : * Query LKey from a packet buffer.
183 : : *
184 : : * @param mr_ctrl
185 : : * Pointer to per-queue MR control structure.
186 : : * @param mbuf
187 : : * Pointer to mbuf.
188 : : *
189 : : * @return
190 : : * Searched LKey on success, UINT32_MAX on no match.
191 : : */
192 : : static __rte_always_inline uint32_t
193 : : mlx5_mr_mb2mr(struct mlx5_mr_ctrl *mr_ctrl, struct rte_mbuf *mbuf)
194 : : {
195 : : uint32_t lkey;
196 : :
197 : : /* Check generation bit to see if there's any change on existing MRs. */
198 [ # # # # : 0 : if (unlikely(*mr_ctrl->dev_gen_ptr != mr_ctrl->cur_gen))
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199 : 0 : mlx5_mr_flush_local_cache(mr_ctrl);
200 : : /* Linear search on MR cache array. */
201 : 0 : lkey = mlx5_mr_lookup_lkey(mr_ctrl->cache, &mr_ctrl->mru,
202 [ # # # # : 0 : MLX5_MR_CACHE_N, (uintptr_t)mbuf->buf_addr);
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203 [ # # # # : 0 : if (likely(lkey != UINT32_MAX))
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204 : : return lkey;
205 : : /* Take slower bottom-half on miss. */
206 : 0 : return mlx5_mr_mb2mr_bh(mr_ctrl, mbuf);
207 : : }
208 : :
209 : : /* mlx5_common_mr.c */
210 : :
211 : : __rte_internal
212 : : int mlx5_mr_ctrl_init(struct mlx5_mr_ctrl *mr_ctrl, uint32_t *dev_gen_ptr,
213 : : int socket);
214 : : __rte_internal
215 : : void mlx5_mr_btree_free(struct mlx5_mr_btree *bt);
216 : : void mlx5_mr_btree_dump(struct mlx5_mr_btree *bt __rte_unused);
217 : : __rte_internal
218 : : uint32_t mlx5_mr_mempool2mr_bh(struct mlx5_mr_ctrl *mr_ctrl,
219 : : struct rte_mempool *mp, uintptr_t addr);
220 : : int mlx5_mr_expand_cache(struct mlx5_mr_share_cache *share_cache,
221 : : uint32_t new_size, int socket);
222 : : void mlx5_mr_release_cache(struct mlx5_mr_share_cache *mr_cache);
223 : : int mlx5_mr_create_cache(struct mlx5_mr_share_cache *share_cache, int socket);
224 : : void mlx5_mr_dump_cache(struct mlx5_mr_share_cache *share_cache __rte_unused);
225 : : void mlx5_mr_rebuild_cache(struct mlx5_mr_share_cache *share_cache);
226 : : void mlx5_free_mr_by_addr(struct mlx5_mr_share_cache *share_cache,
227 : : const char *ibdev_name, const void *addr, size_t len);
228 : : int mlx5_mr_insert_cache(struct mlx5_mr_share_cache *share_cache,
229 : : struct mlx5_mr *mr);
230 : : struct mlx5_mr *
231 : : mlx5_mr_lookup_list(struct mlx5_mr_share_cache *share_cache,
232 : : struct mr_cache_entry *entry, uintptr_t addr);
233 : : struct mlx5_mr *
234 : : mlx5_create_mr_ext(void *pd, uintptr_t addr, size_t len, int socket_id,
235 : : mlx5_reg_mr_t reg_mr_cb);
236 : : void mlx5_mr_free(struct mlx5_mr *mr, mlx5_dereg_mr_t dereg_mr_cb);
237 : : __rte_internal
238 : : uint32_t
239 : : mlx5_mr_create(struct mlx5_common_device *cdev,
240 : : struct mlx5_mr_share_cache *share_cache,
241 : : struct mr_cache_entry *entry, uintptr_t addr);
242 : :
243 : : __rte_internal
244 : : uint32_t
245 : : mlx5_mr_addr2mr_bh(struct mlx5_mr_ctrl *mr_ctrl, uintptr_t addr);
246 : :
247 : : /* mlx5_common_verbs.c */
248 : :
249 : : __rte_internal
250 : : int
251 : : mlx5_common_verbs_reg_mr(void *pd, void *addr, size_t length,
252 : : struct mlx5_pmd_mr *pmd_mr);
253 : : __rte_internal
254 : : void
255 : : mlx5_common_verbs_dereg_mr(struct mlx5_pmd_mr *pmd_mr);
256 : :
257 : : __rte_internal
258 : : void
259 : : mlx5_os_set_reg_mr_cb(mlx5_reg_mr_t *reg_mr_cb, mlx5_dereg_mr_t *dereg_mr_cb);
260 : :
261 : : __rte_internal
262 : : int
263 : : mlx5_mr_mempool_register(struct mlx5_common_device *cdev,
264 : : struct rte_mempool *mp, bool is_extmem);
265 : : __rte_internal
266 : : int
267 : : mlx5_mr_mempool_unregister(struct mlx5_common_device *cdev,
268 : : struct rte_mempool *mp);
269 : :
270 : : __rte_internal
271 : : int
272 : : mlx5_mr_mempool_populate_cache(struct mlx5_mr_ctrl *mr_ctrl,
273 : : struct rte_mempool *mp);
274 : :
275 : : #endif /* RTE_PMD_MLX5_COMMON_MR_H_ */
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