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
37static 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
49static 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
87DECLARE_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
100DECLARE_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
107DECLARE_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
112const 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

source code of linux/drivers/infiniband/core/uverbs_std_types_dm.c