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