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
uverbs_free_mr(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)37 static int uverbs_free_mr(struct ib_uobject *uobject,
38 enum rdma_remove_reason why,
39 struct uverbs_attr_bundle *attrs)
40 {
41 return ib_dereg_mr_user((struct ib_mr *)uobject->object,
42 &attrs->driver_udata);
43 }
44
UVERBS_HANDLER(UVERBS_METHOD_ADVISE_MR)45 static int UVERBS_HANDLER(UVERBS_METHOD_ADVISE_MR)(
46 struct uverbs_attr_bundle *attrs)
47 {
48 struct ib_pd *pd =
49 uverbs_attr_get_obj(attrs, UVERBS_ATTR_ADVISE_MR_PD_HANDLE);
50 enum ib_uverbs_advise_mr_advice advice;
51 struct ib_device *ib_dev = pd->device;
52 struct ib_sge *sg_list;
53 int num_sge;
54 u32 flags;
55 int ret;
56
57 /* FIXME: Extend the UAPI_DEF_OBJ_NEEDS_FN stuff.. */
58 if (!ib_dev->ops.advise_mr)
59 return -EOPNOTSUPP;
60
61 ret = uverbs_get_const(&advice, attrs, UVERBS_ATTR_ADVISE_MR_ADVICE);
62 if (ret)
63 return ret;
64
65 ret = uverbs_get_flags32(&flags, attrs, UVERBS_ATTR_ADVISE_MR_FLAGS,
66 IB_UVERBS_ADVISE_MR_FLAG_FLUSH);
67 if (ret)
68 return ret;
69
70 num_sge = uverbs_attr_ptr_get_array_size(
71 attrs, UVERBS_ATTR_ADVISE_MR_SGE_LIST, sizeof(struct ib_sge));
72 if (num_sge <= 0)
73 return num_sge;
74
75 sg_list = uverbs_attr_get_alloced_ptr(attrs,
76 UVERBS_ATTR_ADVISE_MR_SGE_LIST);
77 return ib_dev->ops.advise_mr(pd, advice, flags, sg_list, num_sge,
78 attrs);
79 }
80
UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)81 static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(
82 struct uverbs_attr_bundle *attrs)
83 {
84 struct ib_dm_mr_attr attr = {};
85 struct ib_uobject *uobj =
86 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE);
87 struct ib_dm *dm =
88 uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_DM_HANDLE);
89 struct ib_pd *pd =
90 uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_PD_HANDLE);
91 struct ib_device *ib_dev = pd->device;
92
93 struct ib_mr *mr;
94 int ret;
95
96 if (!ib_dev->ops.reg_dm_mr)
97 return -EOPNOTSUPP;
98
99 ret = uverbs_copy_from(&attr.offset, attrs, UVERBS_ATTR_REG_DM_MR_OFFSET);
100 if (ret)
101 return ret;
102
103 ret = uverbs_copy_from(&attr.length, attrs,
104 UVERBS_ATTR_REG_DM_MR_LENGTH);
105 if (ret)
106 return ret;
107
108 ret = uverbs_get_flags32(&attr.access_flags, attrs,
109 UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS,
110 IB_ACCESS_SUPPORTED);
111 if (ret)
112 return ret;
113
114 if (!(attr.access_flags & IB_ZERO_BASED))
115 return -EINVAL;
116
117 ret = ib_check_mr_access(attr.access_flags);
118 if (ret)
119 return ret;
120
121 if (attr.offset > dm->length || attr.length > dm->length ||
122 attr.length > dm->length - attr.offset)
123 return -EINVAL;
124
125 mr = pd->device->ops.reg_dm_mr(pd, dm, &attr, attrs);
126 if (IS_ERR(mr))
127 return PTR_ERR(mr);
128
129 mr->device = pd->device;
130 mr->pd = pd;
131 mr->type = IB_MR_TYPE_DM;
132 mr->dm = dm;
133 mr->uobject = uobj;
134 atomic_inc(&pd->usecnt);
135 atomic_inc(&dm->usecnt);
136
137 uobj->object = mr;
138
139 uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE);
140
141 ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_LKEY, &mr->lkey,
142 sizeof(mr->lkey));
143 if (ret)
144 return ret;
145
146 ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
147 &mr->rkey, sizeof(mr->rkey));
148 return ret;
149 }
150
UVERBS_HANDLER(UVERBS_METHOD_QUERY_MR)151 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_MR)(
152 struct uverbs_attr_bundle *attrs)
153 {
154 struct ib_mr *mr =
155 uverbs_attr_get_obj(attrs, UVERBS_ATTR_QUERY_MR_HANDLE);
156 int ret;
157
158 ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_LKEY, &mr->lkey,
159 sizeof(mr->lkey));
160 if (ret)
161 return ret;
162
163 ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_RKEY,
164 &mr->rkey, sizeof(mr->rkey));
165
166 if (ret)
167 return ret;
168
169 ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_LENGTH,
170 &mr->length, sizeof(mr->length));
171
172 if (ret)
173 return ret;
174
175 ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_IOVA,
176 &mr->iova, sizeof(mr->iova));
177
178 return IS_UVERBS_COPY_ERR(ret) ? ret : 0;
179 }
180
181 DECLARE_UVERBS_NAMED_METHOD(
182 UVERBS_METHOD_ADVISE_MR,
183 UVERBS_ATTR_IDR(UVERBS_ATTR_ADVISE_MR_PD_HANDLE,
184 UVERBS_OBJECT_PD,
185 UVERBS_ACCESS_READ,
186 UA_MANDATORY),
187 UVERBS_ATTR_CONST_IN(UVERBS_ATTR_ADVISE_MR_ADVICE,
188 enum ib_uverbs_advise_mr_advice,
189 UA_MANDATORY),
190 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_ADVISE_MR_FLAGS,
191 enum ib_uverbs_advise_mr_flag,
192 UA_MANDATORY),
193 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ADVISE_MR_SGE_LIST,
194 UVERBS_ATTR_MIN_SIZE(sizeof(struct ib_uverbs_sge)),
195 UA_MANDATORY,
196 UA_ALLOC_AND_COPY));
197
198 DECLARE_UVERBS_NAMED_METHOD(
199 UVERBS_METHOD_QUERY_MR,
200 UVERBS_ATTR_IDR(UVERBS_ATTR_QUERY_MR_HANDLE,
201 UVERBS_OBJECT_MR,
202 UVERBS_ACCESS_READ,
203 UA_MANDATORY),
204 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_RKEY,
205 UVERBS_ATTR_TYPE(u32),
206 UA_MANDATORY),
207 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_LKEY,
208 UVERBS_ATTR_TYPE(u32),
209 UA_MANDATORY),
210 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_LENGTH,
211 UVERBS_ATTR_TYPE(u64),
212 UA_MANDATORY),
213 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_IOVA,
214 UVERBS_ATTR_TYPE(u64),
215 UA_OPTIONAL));
216
217 DECLARE_UVERBS_NAMED_METHOD(
218 UVERBS_METHOD_DM_MR_REG,
219 UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_HANDLE,
220 UVERBS_OBJECT_MR,
221 UVERBS_ACCESS_NEW,
222 UA_MANDATORY),
223 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_OFFSET,
224 UVERBS_ATTR_TYPE(u64),
225 UA_MANDATORY),
226 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_LENGTH,
227 UVERBS_ATTR_TYPE(u64),
228 UA_MANDATORY),
229 UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_PD_HANDLE,
230 UVERBS_OBJECT_PD,
231 UVERBS_ACCESS_READ,
232 UA_MANDATORY),
233 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS,
234 enum ib_access_flags),
235 UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_DM_HANDLE,
236 UVERBS_OBJECT_DM,
237 UVERBS_ACCESS_READ,
238 UA_MANDATORY),
239 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_LKEY,
240 UVERBS_ATTR_TYPE(u32),
241 UA_MANDATORY),
242 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
243 UVERBS_ATTR_TYPE(u32),
244 UA_MANDATORY));
245
246 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
247 UVERBS_METHOD_MR_DESTROY,
248 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MR_HANDLE,
249 UVERBS_OBJECT_MR,
250 UVERBS_ACCESS_DESTROY,
251 UA_MANDATORY));
252
253 DECLARE_UVERBS_NAMED_OBJECT(
254 UVERBS_OBJECT_MR,
255 UVERBS_TYPE_ALLOC_IDR(uverbs_free_mr),
256 &UVERBS_METHOD(UVERBS_METHOD_DM_MR_REG),
257 &UVERBS_METHOD(UVERBS_METHOD_MR_DESTROY),
258 &UVERBS_METHOD(UVERBS_METHOD_ADVISE_MR),
259 &UVERBS_METHOD(UVERBS_METHOD_QUERY_MR));
260
261 const struct uapi_definition uverbs_def_obj_mr[] = {
262 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MR,
263 UAPI_DEF_OBJ_NEEDS_FN(dereg_mr)),
264 {}
265 };
266
