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->ops.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->ops.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->ops.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 };