1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2020 Mellanox Technologies, Ltd
3 */
4
5 #include <stddef.h>
6 #include <errno.h>
7 #include <string.h>
8 #include <stdint.h>
9 #include <unistd.h>
10 #include <sys/mman.h>
11 #include <inttypes.h>
12
13 #include "mlx5_autoconf.h"
14 #include <mlx5_glue.h>
15 #include <mlx5_common.h>
16 #include <mlx5_common_mr.h>
17
18 /**
19 * Register mr. Given protection domain pointer, pointer to addr and length
20 * register the memory region.
21 *
22 * @param[in] pd
23 * Pointer to protection domain context.
24 * @param[in] addr
25 * Pointer to memory start address.
26 * @param[in] length
27 * Length of the memory to register.
28 * @param[out] pmd_mr
29 * pmd_mr struct set with lkey, address, length and pointer to mr object
30 *
31 * @return
32 * 0 on successful registration, -1 otherwise
33 */
34 int
mlx5_common_verbs_reg_mr(void * pd,void * addr,size_t length,struct mlx5_pmd_mr * pmd_mr)35 mlx5_common_verbs_reg_mr(void *pd, void *addr, size_t length,
36 struct mlx5_pmd_mr *pmd_mr)
37 {
38 struct ibv_mr *ibv_mr;
39
40 memset(pmd_mr, 0, sizeof(*pmd_mr));
41 ibv_mr = mlx5_glue->reg_mr(pd, addr, length,
42 IBV_ACCESS_LOCAL_WRITE |
43 (haswell_broadwell_cpu ? 0 :
44 IBV_ACCESS_RELAXED_ORDERING));
45 if (!ibv_mr)
46 return -1;
47
48 *pmd_mr = (struct mlx5_pmd_mr){
49 .lkey = ibv_mr->lkey,
50 .addr = ibv_mr->addr,
51 .len = ibv_mr->length,
52 .obj = (void *)ibv_mr,
53 };
54 return 0;
55 }
56
57 /**
58 * Deregister mr. Given the mlx5 pmd MR - deregister the MR
59 *
60 * @param[in] pmd_mr
61 * pmd_mr struct set with lkey, address, length and pointer to mr object
62 *
63 */
64 void
mlx5_common_verbs_dereg_mr(struct mlx5_pmd_mr * pmd_mr)65 mlx5_common_verbs_dereg_mr(struct mlx5_pmd_mr *pmd_mr)
66 {
67 if (pmd_mr && pmd_mr->obj != NULL) {
68 claim_zero(mlx5_glue->dereg_mr(pmd_mr->obj));
69 memset(pmd_mr, 0, sizeof(*pmd_mr));
70 }
71 }
72
73