Merge remote-tracking branch 'torvalds/master' into perf/core
[linux-2.6-microblaze.git] / drivers / infiniband / core / uverbs_std_types_dm.c
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(&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, 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(dm))
75                 return PTR_ERR(dm);
76
77         dm->device  = ib_dev;
78         dm->length  = attr.length;
79         dm->uobject = uobj;
80         atomic_set(&dm->usecnt, 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 };