LXR linux/drivers/infiniband/core/uverbs_std_types

   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
  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
  43        if (atomic_read(&dm->usecnt))
  44                return -EBUSY;
  45
  46        return dm->device->ops.dealloc_dm(dm, attrs);
  47}
  48
  49static 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
  87DECLARE_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
 100DECLARE_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
 107DECLARE_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
 112const 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};
 117