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 <rte_errno.h> 14 #include <rte_bus_pci.h> 15 16 #include "mlx5_common_utils.h" 17 #include "mlx5_common_log.h" 18 #include "mlx5_common_private.h" 19 #include "mlx5_autoconf.h" 20 #include <mlx5_glue.h> 21 #include <mlx5_common.h> 22 #include <mlx5_common_mr.h> 23 24 struct ibv_device * 25 mlx5_os_get_ibv_dev(const struct rte_device *dev) 26 { 27 struct ibv_device *ibv = NULL; 28 29 if (mlx5_dev_is_pci(dev)) 30 ibv = mlx5_os_get_ibv_device(&RTE_DEV_TO_PCI_CONST(dev)->addr); 31 if (ibv == NULL) { 32 rte_errno = ENODEV; 33 DRV_LOG(ERR, "Verbs device not found: %s", dev->name); 34 } 35 return ibv; 36 } 37 38 /** 39 * Register mr. Given protection domain pointer, pointer to addr and length 40 * register the memory region. 41 * 42 * @param[in] pd 43 * Pointer to protection domain context. 44 * @param[in] addr 45 * Pointer to memory start address. 46 * @param[in] length 47 * Length of the memory to register. 48 * @param[out] pmd_mr 49 * pmd_mr struct set with lkey, address, length and pointer to mr object 50 * 51 * @return 52 * 0 on successful registration, -1 otherwise 53 */ 54 int 55 mlx5_common_verbs_reg_mr(void *pd, void *addr, size_t length, 56 struct mlx5_pmd_mr *pmd_mr) 57 { 58 struct ibv_mr *ibv_mr; 59 60 ibv_mr = mlx5_glue->reg_mr(pd, addr, length, 61 IBV_ACCESS_LOCAL_WRITE | 62 (haswell_broadwell_cpu ? 0 : 63 IBV_ACCESS_RELAXED_ORDERING)); 64 if (!ibv_mr) 65 return -1; 66 67 *pmd_mr = (struct mlx5_pmd_mr){ 68 .lkey = ibv_mr->lkey, 69 .addr = ibv_mr->addr, 70 .len = ibv_mr->length, 71 .obj = (void *)ibv_mr, 72 }; 73 return 0; 74 } 75 76 /** 77 * Deregister mr. Given the mlx5 pmd MR - deregister the MR 78 * 79 * @param[in] pmd_mr 80 * pmd_mr struct set with lkey, address, length and pointer to mr object 81 * 82 */ 83 void 84 mlx5_common_verbs_dereg_mr(struct mlx5_pmd_mr *pmd_mr) 85 { 86 if (pmd_mr && pmd_mr->obj != NULL) { 87 claim_zero(mlx5_glue->dereg_mr(pmd_mr->obj)); 88 memset(pmd_mr, 0, sizeof(*pmd_mr)); 89 } 90 } 91