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 "rdma_core.h" 34 #include "uverbs.h" 35 #include <rdma/uverbs_std_types.h> 36 37 static int uverbs_free_dm(struct ib_uobject *uobject, 38 enum rdma_remove_reason why, 39 struct uverbs_attr_bundle *attrs) 40 { 41 struct ib_dm *dm = uobject->object; 42 int ret; 43 44 ret = ib_destroy_usecnt(&dm->usecnt, why, uobject); 45 if (ret) 46 return ret; 47 48 return dm->device->dealloc_dm(dm, attrs); 49 } 50 51 static int UVERBS_HANDLER(UVERBS_METHOD_DM_ALLOC)( 52 struct uverbs_attr_bundle *attrs) 53 { 54 struct ib_dm_alloc_attr attr = {}; 55 struct ib_uobject *uobj = 56 uverbs_attr_get(attrs, UVERBS_ATTR_ALLOC_DM_HANDLE) 57 ->obj_attr.uobject; 58 struct ib_device *ib_dev = attrs->context->device; 59 struct ib_dm *dm; 60 int ret; 61 62 if (!ib_dev->alloc_dm) 63 return -EOPNOTSUPP; 64 65 ret = uverbs_copy_from(&attr.length, attrs, 66 UVERBS_ATTR_ALLOC_DM_LENGTH); 67 if (ret) 68 return ret; 69 70 ret = uverbs_copy_from(&attr.alignment, attrs, 71 UVERBS_ATTR_ALLOC_DM_ALIGNMENT); 72 if (ret) 73 return ret; 74 75 dm = ib_dev->alloc_dm(ib_dev, attrs->context, &attr, attrs); 76 if (IS_ERR(dm)) 77 return PTR_ERR(dm); 78 79 dm->device = ib_dev; 80 dm->length = attr.length; 81 dm->uobject = uobj; 82 atomic_set(&dm->usecnt, 0); 83 84 uobj->object = dm; 85 86 return 0; 87 } 88 89 DECLARE_UVERBS_NAMED_METHOD( 90 UVERBS_METHOD_DM_ALLOC, 91 UVERBS_ATTR_IDR(UVERBS_ATTR_ALLOC_DM_HANDLE, 92 UVERBS_OBJECT_DM, 93 UVERBS_ACCESS_NEW, 94 UA_MANDATORY), 95 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ALLOC_DM_LENGTH, 96 UVERBS_ATTR_TYPE(u64), 97 UA_MANDATORY), 98 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ALLOC_DM_ALIGNMENT, 99 UVERBS_ATTR_TYPE(u32), 100 UA_MANDATORY)); 101 102 DECLARE_UVERBS_NAMED_METHOD_DESTROY( 103 UVERBS_METHOD_DM_FREE, 104 UVERBS_ATTR_IDR(UVERBS_ATTR_FREE_DM_HANDLE, 105 UVERBS_OBJECT_DM, 106 UVERBS_ACCESS_DESTROY, 107 UA_MANDATORY)); 108 109 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_DM, 110 UVERBS_TYPE_ALLOC_IDR(uverbs_free_dm), 111 &UVERBS_METHOD(UVERBS_METHOD_DM_ALLOC), 112 &UVERBS_METHOD(UVERBS_METHOD_DM_FREE)); 113 114 const struct uapi_definition uverbs_def_obj_dm[] = { 115 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DM, 116 UAPI_DEF_OBJ_NEEDS_FN(dealloc_dm)), 117 {} 118 }; 119