drivers/infiniband/core/uverbs_std_types_mr.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 #include "restrack.h"
  37
  38 static int uverbs_free_mr(struct ib_uobject *uobject,
  39                           enum rdma_remove_reason why,
  40                           struct uverbs_attr_bundle *attrs)
  41 {
  42         return ib_dereg_mr_user((struct ib_mr *)uobject->object,
  43                                 &attrs->driver_udata);
  44 }
  45
  46 static int UVERBS_HANDLER(UVERBS_METHOD_ADVISE_MR)(
  47         struct uverbs_attr_bundle *attrs)
  48 {
  49         struct ib_pd *pd =
  50                 uverbs_attr_get_obj(attrs, UVERBS_ATTR_ADVISE_MR_PD_HANDLE);
  51         enum ib_uverbs_advise_mr_advice advice;
  52         struct ib_device *ib_dev = pd->device;
  53         struct ib_sge *sg_list;
  54         int num_sge;
  55         u32 flags;
  56         int ret;
  57
  58         /* FIXME: Extend the UAPI_DEF_OBJ_NEEDS_FN stuff.. */
  59         if (!ib_dev->ops.advise_mr)
  60                 return -EOPNOTSUPP;
  61
  62         ret = uverbs_get_const(&advice, attrs, UVERBS_ATTR_ADVISE_MR_ADVICE);
  63         if (ret)
  64                 return ret;
  65
  66         ret = uverbs_get_flags32(&flags, attrs, UVERBS_ATTR_ADVISE_MR_FLAGS,
  67                                  IB_UVERBS_ADVISE_MR_FLAG_FLUSH);
  68         if (ret)
  69                 return ret;
  70
  71         num_sge = uverbs_attr_ptr_get_array_size(
  72                 attrs, UVERBS_ATTR_ADVISE_MR_SGE_LIST, sizeof(struct ib_sge));
  73         if (num_sge <= 0)
  74                 return num_sge;
  75
  76         sg_list = uverbs_attr_get_alloced_ptr(attrs,
  77                                               UVERBS_ATTR_ADVISE_MR_SGE_LIST);
  78         return ib_dev->ops.advise_mr(pd, advice, flags, sg_list, num_sge,
  79                                      attrs);
  80 }
  81
  82 static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(
  83         struct uverbs_attr_bundle *attrs)
  84 {
  85         struct ib_dm_mr_attr attr = {};
  86         struct ib_uobject *uobj =
  87                 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE);
  88         struct ib_dm *dm =
  89                 uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_DM_HANDLE);
  90         struct ib_pd *pd =
  91                 uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_PD_HANDLE);
  92         struct ib_device *ib_dev = pd->device;
  93
  94         struct ib_mr *mr;
  95         int ret;
  96
  97         if (!ib_dev->ops.reg_dm_mr)
  98                 return -EOPNOTSUPP;
  99
 100         ret = uverbs_copy_from(&attr.offset, attrs, UVERBS_ATTR_REG_DM_MR_OFFSET);
 101         if (ret)
 102                 return ret;
 103
 104         ret = uverbs_copy_from(&attr.length, attrs,
 105                                UVERBS_ATTR_REG_DM_MR_LENGTH);
 106         if (ret)
 107                 return ret;
 108
 109         ret = uverbs_get_flags32(&attr.access_flags, attrs,
 110                                  UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS,
 111                                  IB_ACCESS_SUPPORTED);
 112         if (ret)
 113                 return ret;
 114
 115         if (!(attr.access_flags & IB_ZERO_BASED))
 116                 return -EINVAL;
 117
 118         ret = ib_check_mr_access(ib_dev, attr.access_flags);
 119         if (ret)
 120                 return ret;
 121
 122         if (attr.offset > dm->length || attr.length > dm->length ||
 123             attr.length > dm->length - attr.offset)
 124                 return -EINVAL;
 125
 126         mr = pd->device->ops.reg_dm_mr(pd, dm, &attr, attrs);
 127         if (IS_ERR(mr))
 128                 return PTR_ERR(mr);
 129
 130         mr->device  = pd->device;
 131         mr->pd      = pd;
 132         mr->type    = IB_MR_TYPE_DM;
 133         mr->dm      = dm;
 134         mr->uobject = uobj;
 135         atomic_inc(&pd->usecnt);
 136         atomic_inc(&dm->usecnt);
 137
 138         rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
 139         rdma_restrack_set_name(&mr->res, NULL);
 140         rdma_restrack_add(&mr->res);
 141         uobj->object = mr;
 142
 143         uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE);
 144
 145         ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_LKEY, &mr->lkey,
 146                              sizeof(mr->lkey));
 147         if (ret)
 148                 return ret;
 149
 150         ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
 151                              &mr->rkey, sizeof(mr->rkey));
 152         return ret;
 153 }
 154
 155 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_MR)(
 156         struct uverbs_attr_bundle *attrs)
 157 {
 158         struct ib_mr *mr =
 159                 uverbs_attr_get_obj(attrs, UVERBS_ATTR_QUERY_MR_HANDLE);
 160         int ret;
 161
 162         ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_LKEY, &mr->lkey,
 163                              sizeof(mr->lkey));
 164         if (ret)
 165                 return ret;
 166
 167         ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_RKEY,
 168                              &mr->rkey, sizeof(mr->rkey));
 169
 170         if (ret)
 171                 return ret;
 172
 173         ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_LENGTH,
 174                              &mr->length, sizeof(mr->length));
 175
 176         if (ret)
 177                 return ret;
 178
 179         ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_IOVA,
 180                              &mr->iova, sizeof(mr->iova));
 181
 182         return IS_UVERBS_COPY_ERR(ret) ? ret : 0;
 183 }
 184
 185 DECLARE_UVERBS_NAMED_METHOD(
 186         UVERBS_METHOD_ADVISE_MR,
 187         UVERBS_ATTR_IDR(UVERBS_ATTR_ADVISE_MR_PD_HANDLE,
 188                         UVERBS_OBJECT_PD,
 189                         UVERBS_ACCESS_READ,
 190                         UA_MANDATORY),
 191         UVERBS_ATTR_CONST_IN(UVERBS_ATTR_ADVISE_MR_ADVICE,
 192                              enum ib_uverbs_advise_mr_advice,
 193                              UA_MANDATORY),
 194         UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_ADVISE_MR_FLAGS,
 195                              enum ib_uverbs_advise_mr_flag,
 196                              UA_MANDATORY),
 197         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ADVISE_MR_SGE_LIST,
 198                            UVERBS_ATTR_MIN_SIZE(sizeof(struct ib_uverbs_sge)),
 199                            UA_MANDATORY,
 200                            UA_ALLOC_AND_COPY));
 201
 202 DECLARE_UVERBS_NAMED_METHOD(
 203         UVERBS_METHOD_QUERY_MR,
 204         UVERBS_ATTR_IDR(UVERBS_ATTR_QUERY_MR_HANDLE,
 205                         UVERBS_OBJECT_MR,
 206                         UVERBS_ACCESS_READ,
 207                         UA_MANDATORY),
 208         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_RKEY,
 209                             UVERBS_ATTR_TYPE(u32),
 210                             UA_MANDATORY),
 211         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_LKEY,
 212                             UVERBS_ATTR_TYPE(u32),
 213                             UA_MANDATORY),
 214         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_LENGTH,
 215                             UVERBS_ATTR_TYPE(u64),
 216                             UA_MANDATORY),
 217         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_IOVA,
 218                             UVERBS_ATTR_TYPE(u64),
 219                             UA_OPTIONAL));
 220
 221 DECLARE_UVERBS_NAMED_METHOD(
 222         UVERBS_METHOD_DM_MR_REG,
 223         UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_HANDLE,
 224                         UVERBS_OBJECT_MR,
 225                         UVERBS_ACCESS_NEW,
 226                         UA_MANDATORY),
 227         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_OFFSET,
 228                            UVERBS_ATTR_TYPE(u64),
 229                            UA_MANDATORY),
 230         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_LENGTH,
 231                            UVERBS_ATTR_TYPE(u64),
 232                            UA_MANDATORY),
 233         UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_PD_HANDLE,
 234                         UVERBS_OBJECT_PD,
 235                         UVERBS_ACCESS_READ,
 236                         UA_MANDATORY),
 237         UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS,
 238                              enum ib_access_flags),
 239         UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_DM_HANDLE,
 240                         UVERBS_OBJECT_DM,
 241                         UVERBS_ACCESS_READ,
 242                         UA_MANDATORY),
 243         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_LKEY,
 244                             UVERBS_ATTR_TYPE(u32),
 245                             UA_MANDATORY),
 246         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
 247                             UVERBS_ATTR_TYPE(u32),
 248                             UA_MANDATORY));
 249
 250 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 251         UVERBS_METHOD_MR_DESTROY,
 252         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MR_HANDLE,
 253                         UVERBS_OBJECT_MR,
 254                         UVERBS_ACCESS_DESTROY,
 255                         UA_MANDATORY));
 256
 257 DECLARE_UVERBS_NAMED_OBJECT(
 258         UVERBS_OBJECT_MR,
 259         UVERBS_TYPE_ALLOC_IDR(uverbs_free_mr),
 260         &UVERBS_METHOD(UVERBS_METHOD_DM_MR_REG),
 261         &UVERBS_METHOD(UVERBS_METHOD_MR_DESTROY),
 262         &UVERBS_METHOD(UVERBS_METHOD_ADVISE_MR),
 263         &UVERBS_METHOD(UVERBS_METHOD_QUERY_MR));
 264
 265 const struct uapi_definition uverbs_def_obj_mr[] = {
 266         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MR,
 267                                       UAPI_DEF_OBJ_NEEDS_FN(dereg_mr)),
 268         {}
 269 };