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
  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
  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
  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         ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_LKEY, &mr->lkey,
 140                              sizeof(mr->lkey));
 141         if (ret)
 142                 goto err_dereg;
 143
 144         ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
 145                              &mr->rkey, sizeof(mr->rkey));
 146         if (ret)
 147                 goto err_dereg;
 148
 149         return 0;
 150
 151 err_dereg:
 152         ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs));
 153
 154         return ret;
 155 }
 156
 157 DECLARE_UVERBS_NAMED_METHOD(
 158         UVERBS_METHOD_ADVISE_MR,
 159         UVERBS_ATTR_IDR(UVERBS_ATTR_ADVISE_MR_PD_HANDLE,
 160                         UVERBS_OBJECT_PD,
 161                         UVERBS_ACCESS_READ,
 162                         UA_MANDATORY),
 163         UVERBS_ATTR_CONST_IN(UVERBS_ATTR_ADVISE_MR_ADVICE,
 164                              enum ib_uverbs_advise_mr_advice,
 165                              UA_MANDATORY),
 166         UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_ADVISE_MR_FLAGS,
 167                              enum ib_uverbs_advise_mr_flag,
 168                              UA_MANDATORY),
 169         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ADVISE_MR_SGE_LIST,
 170                            UVERBS_ATTR_MIN_SIZE(sizeof(struct ib_uverbs_sge)),
 171                            UA_MANDATORY,
 172                            UA_ALLOC_AND_COPY));
 173
 174 DECLARE_UVERBS_NAMED_METHOD(
 175         UVERBS_METHOD_DM_MR_REG,
 176         UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_HANDLE,
 177                         UVERBS_OBJECT_MR,
 178                         UVERBS_ACCESS_NEW,
 179                         UA_MANDATORY),
 180         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_OFFSET,
 181                            UVERBS_ATTR_TYPE(u64),
 182                            UA_MANDATORY),
 183         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_LENGTH,
 184                            UVERBS_ATTR_TYPE(u64),
 185                            UA_MANDATORY),
 186         UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_PD_HANDLE,
 187                         UVERBS_OBJECT_PD,
 188                         UVERBS_ACCESS_READ,
 189                         UA_MANDATORY),
 190         UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS,
 191                              enum ib_access_flags),
 192         UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_DM_HANDLE,
 193                         UVERBS_OBJECT_DM,
 194                         UVERBS_ACCESS_READ,
 195                         UA_MANDATORY),
 196         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_LKEY,
 197                             UVERBS_ATTR_TYPE(u32),
 198                             UA_MANDATORY),
 199         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
 200                             UVERBS_ATTR_TYPE(u32),
 201                             UA_MANDATORY));
 202
 203 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 204         UVERBS_METHOD_MR_DESTROY,
 205         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MR_HANDLE,
 206                         UVERBS_OBJECT_MR,
 207                         UVERBS_ACCESS_DESTROY,
 208                         UA_MANDATORY));
 209
 210 DECLARE_UVERBS_NAMED_OBJECT(
 211         UVERBS_OBJECT_MR,
 212         UVERBS_TYPE_ALLOC_IDR(uverbs_free_mr),
 213         &UVERBS_METHOD(UVERBS_METHOD_DM_MR_REG),
 214         &UVERBS_METHOD(UVERBS_METHOD_MR_DESTROY),
 215         &UVERBS_METHOD(UVERBS_METHOD_ADVISE_MR));
 216
 217 const struct uapi_definition uverbs_def_obj_mr[] = {
 218         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MR,
 219                                       UAPI_DEF_OBJ_NEEDS_FN(dereg_mr)),
 220         {}
 221 };