133965Sjdp/*
278828Sobrien * Copyright (c) 2018, Mellanox Technologies inc.  All rights reserved.
333965Sjdp *
433965Sjdp * This software is available to you under a choice of one of two
533965Sjdp * licenses.  You may choose to be licensed under the terms of the GNU
633965Sjdp * General Public License (GPL) Version 2, available from the file
733965Sjdp * COPYING in the main directory of this source tree, or the
833965Sjdp * OpenIB.org BSD license below:
933965Sjdp *
1033965Sjdp *     Redistribution and use in source and binary forms, with or
1133965Sjdp *     without modification, are permitted provided that the following
1233965Sjdp *     conditions are met:
1333965Sjdp *
1433965Sjdp *      - Redistributions of source code must retain the above
1533965Sjdp *        copyright notice, this list of conditions and the following
1633965Sjdp *        disclaimer.
1733965Sjdp *
1833965Sjdp *      - Redistributions in binary form must reproduce the above
19218822Sdim *        copyright notice, this list of conditions and the following
2033965Sjdp *        disclaimer in the documentation and/or other materials
2133965Sjdp *        provided with the distribution.
2233965Sjdp *
2333965Sjdp * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
2433965Sjdp * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
2533965Sjdp * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
2633965Sjdp * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
2733965Sjdp * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
2833965Sjdp * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
2933965Sjdp * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
3033965Sjdp * SOFTWARE.
3133965Sjdp */
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	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
51static 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
89DECLARE_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
102DECLARE_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
109DECLARE_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
114const 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