1 /* 2 * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 33 #include "uverbs.h" 34 #include <rdma/uverbs_std_types.h> 35 36 static int uverbs_free_mr(struct ib_uobject *uobject, 37 enum rdma_remove_reason why) 38 { 39 return ib_dereg_mr((struct ib_mr *)uobject->object); 40 } 41 42 static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(struct ib_device *ib_dev, 43 struct ib_uverbs_file *file, 44 struct uverbs_attr_bundle *attrs) 45 { 46 struct ib_dm_mr_attr attr = {}; 47 struct ib_uobject *uobj; 48 struct ib_dm *dm; 49 struct ib_pd *pd; 50 struct ib_mr *mr; 51 int ret; 52 53 if (!ib_dev->reg_dm_mr) 54 return -EOPNOTSUPP; 55 56 ret = uverbs_copy_from(&attr.offset, attrs, UVERBS_ATTR_REG_DM_MR_OFFSET); 57 if (ret) 58 return ret; 59 60 ret = uverbs_copy_from(&attr.length, attrs, 61 UVERBS_ATTR_REG_DM_MR_LENGTH); 62 if (ret) 63 return ret; 64 65 ret = uverbs_copy_from(&attr.access_flags, attrs, 66 UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS); 67 if (ret) 68 return ret; 69 70 if (!(attr.access_flags & IB_ZERO_BASED)) 71 return -EINVAL; 72 73 ret = ib_check_mr_access(attr.access_flags); 74 if (ret) 75 return ret; 76 77 pd = uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_PD_HANDLE); 78 79 dm = uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_DM_HANDLE); 80 81 uobj = uverbs_attr_get(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE)->obj_attr.uobject; 82 83 if (attr.offset > dm->length || attr.length > dm->length || 84 attr.length > dm->length - attr.offset) 85 return -EINVAL; 86 87 mr = pd->device->reg_dm_mr(pd, dm, &attr, attrs); 88 if (IS_ERR(mr)) 89 return PTR_ERR(mr); 90 91 mr->device = pd->device; 92 mr->pd = pd; 93 mr->dm = dm; 94 mr->uobject = uobj; 95 atomic_inc(&pd->usecnt); 96 atomic_inc(&dm->usecnt); 97 98 uobj->object = mr; 99 100 ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_LKEY, &mr->lkey, 101 sizeof(mr->lkey)); 102 if (ret) 103 goto err_dereg; 104 105 ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_RKEY, 106 &mr->rkey, sizeof(mr->rkey)); 107 if (ret) 108 goto err_dereg; 109 110 return 0; 111 112 err_dereg: 113 ib_dereg_mr(mr); 114 115 return ret; 116 } 117 118 static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_DM_MR_REG, 119 &UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_HANDLE, UVERBS_OBJECT_MR, 120 UVERBS_ACCESS_NEW, 121 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 122 &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_OFFSET, 123 UVERBS_ATTR_TYPE(u64), 124 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 125 &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_LENGTH, 126 UVERBS_ATTR_TYPE(u64), 127 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 128 &UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_PD_HANDLE, UVERBS_OBJECT_PD, 129 UVERBS_ACCESS_READ, 130 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 131 &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS, 132 UVERBS_ATTR_TYPE(u32), 133 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 134 &UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_DM_HANDLE, UVERBS_OBJECT_DM, 135 UVERBS_ACCESS_READ, 136 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 137 &UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_LKEY, 138 UVERBS_ATTR_TYPE(u32), 139 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 140 &UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_RKEY, 141 UVERBS_ATTR_TYPE(u32), 142 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); 143 144 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MR, 145 /* 1 is used in order to free the MR after all the MWs */ 146 &UVERBS_TYPE_ALLOC_IDR(1, uverbs_free_mr), 147 &UVERBS_METHOD(UVERBS_METHOD_DM_MR_REG)); 148