/*
 * Copyright (c) 2018, Mellanox Technologies inc.  All rights reserved.
 * Copyright (c) 2020, Intel Corporation.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "rdma_core.h"
#include "uverbs.h"
#include <rdma/uverbs_std_types.h>
#include "restrack.h"

static int uverbs_free_mr(struct ib_uobject *uobject,
                          enum rdma_remove_reason why,
                          struct uverbs_attr_bundle *attrs)
{
        return ib_dereg_mr_user((struct ib_mr *)uobject->object,
                                &attrs->driver_udata);
}

static int UVERBS_HANDLER(UVERBS_METHOD_ADVISE_MR)(
        struct uverbs_attr_bundle *attrs)
{
        struct ib_pd *pd =
                uverbs_attr_get_obj(attrs, UVERBS_ATTR_ADVISE_MR_PD_HANDLE);
        enum ib_uverbs_advise_mr_advice advice;
        struct ib_device *ib_dev = pd->device;
        struct ib_sge *sg_list;
        int num_sge;
        u32 flags;
        int ret;

        /* FIXME: Extend the UAPI_DEF_OBJ_NEEDS_FN stuff.. */
        if (!ib_dev->ops.advise_mr)
                return -EOPNOTSUPP;

        ret = uverbs_get_const(&advice, attrs, UVERBS_ATTR_ADVISE_MR_ADVICE);
        if (ret)
                return ret;

        ret = uverbs_get_flags32(&flags, attrs, UVERBS_ATTR_ADVISE_MR_FLAGS,
                                 IB_UVERBS_ADVISE_MR_FLAG_FLUSH);
        if (ret)
                return ret;

        num_sge = uverbs_attr_ptr_get_array_size(
                attrs, UVERBS_ATTR_ADVISE_MR_SGE_LIST, sizeof(struct ib_sge));
        if (num_sge <= 0)
                return num_sge;

        sg_list = uverbs_attr_get_alloced_ptr(attrs,
                                              UVERBS_ATTR_ADVISE_MR_SGE_LIST);
        return ib_dev->ops.advise_mr(pd, advice, flags, sg_list, num_sge,
                                     attrs);
}

static int UVERBS_HANDLER(UVERBS_METHOD_DM_MR_REG)(
        struct uverbs_attr_bundle *attrs)
{
        struct ib_dm_mr_attr attr = {};
        struct ib_uobject *uobj =
                uverbs_attr_get_uobject(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE);
        struct ib_dm *dm =
                uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_DM_HANDLE);
        struct ib_pd *pd =
                uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DM_MR_PD_HANDLE);
        struct ib_device *ib_dev = pd->device;

        struct ib_mr *mr;
        int ret;

        if (!ib_dev->ops.reg_dm_mr)
                return -EOPNOTSUPP;

        ret = uverbs_copy_from(&attr.offset, attrs, UVERBS_ATTR_REG_DM_MR_OFFSET);
        if (ret)
                return ret;

        ret = uverbs_copy_from(&attr.length, attrs,
                               UVERBS_ATTR_REG_DM_MR_LENGTH);
        if (ret)
                return ret;

        ret = uverbs_get_flags32(&attr.access_flags, attrs,
                                 UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS,
                                 IB_ACCESS_SUPPORTED);
        if (ret)
                return ret;

        if (!(attr.access_flags & IB_ZERO_BASED))
                return -EINVAL;

        ret = ib_check_mr_access(ib_dev, attr.access_flags);
        if (ret)
                return ret;

        if (attr.offset > dm->length || attr.length > dm->length ||
            attr.length > dm->length - attr.offset)
                return -EINVAL;

        mr = pd->device->ops.reg_dm_mr(pd, dm, &attr, attrs);
        if (IS_ERR(mr))
                return PTR_ERR(mr);

        mr->device  = pd->device;
        mr->pd      = pd;
        mr->type    = IB_MR_TYPE_DM;
        mr->dm      = dm;
        mr->uobject = uobj;
        atomic_inc(&pd->usecnt);
        atomic_inc(&dm->usecnt);

        rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
        rdma_restrack_set_name(&mr->res, NULL);
        rdma_restrack_add(&mr->res);
        uobj->object = mr;

        uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_REG_DM_MR_HANDLE);

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_LKEY, &mr->lkey,
                             sizeof(mr->lkey));
        if (ret)
                return ret;

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
                             &mr->rkey, sizeof(mr->rkey));
        return ret;
}

static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_MR)(
        struct uverbs_attr_bundle *attrs)
{
        struct ib_mr *mr =
                uverbs_attr_get_obj(attrs, UVERBS_ATTR_QUERY_MR_HANDLE);
        int ret;

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_LKEY, &mr->lkey,
                             sizeof(mr->lkey));
        if (ret)
                return ret;

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_RKEY,
                             &mr->rkey, sizeof(mr->rkey));

        if (ret)
                return ret;

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_LENGTH,
                             &mr->length, sizeof(mr->length));

        if (ret)
                return ret;

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_QUERY_MR_RESP_IOVA,
                             &mr->iova, sizeof(mr->iova));

        return IS_UVERBS_COPY_ERR(ret) ? ret : 0;
}

static int UVERBS_HANDLER(UVERBS_METHOD_REG_DMABUF_MR)(
        struct uverbs_attr_bundle *attrs)
{
        struct ib_uobject *uobj =
                uverbs_attr_get_uobject(attrs, UVERBS_ATTR_REG_DMABUF_MR_HANDLE);
        struct ib_pd *pd =
                uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_DMABUF_MR_PD_HANDLE);
        struct ib_device *ib_dev = pd->device;

        u64 offset, length, iova;
        u32 fd, access_flags;
        struct ib_mr *mr;
        int ret;

        if (!ib_dev->ops.reg_user_mr_dmabuf)
                return -EOPNOTSUPP;

        ret = uverbs_copy_from(&offset, attrs,
                               UVERBS_ATTR_REG_DMABUF_MR_OFFSET);
        if (ret)
                return ret;

        ret = uverbs_copy_from(&length, attrs,
                               UVERBS_ATTR_REG_DMABUF_MR_LENGTH);
        if (ret)
                return ret;

        ret = uverbs_copy_from(&iova, attrs,
                               UVERBS_ATTR_REG_DMABUF_MR_IOVA);
        if (ret)
                return ret;

        if ((offset & ~PAGE_MASK) != (iova & ~PAGE_MASK))
                return -EINVAL;

        ret = uverbs_copy_from(&fd, attrs,
                               UVERBS_ATTR_REG_DMABUF_MR_FD);
        if (ret)
                return ret;

        ret = uverbs_get_flags32(&access_flags, attrs,
                                 UVERBS_ATTR_REG_DMABUF_MR_ACCESS_FLAGS,
                                 IB_ACCESS_LOCAL_WRITE |
                                 IB_ACCESS_REMOTE_READ |
                                 IB_ACCESS_REMOTE_WRITE |
                                 IB_ACCESS_REMOTE_ATOMIC |
                                 IB_ACCESS_RELAXED_ORDERING);
        if (ret)
                return ret;

        ret = ib_check_mr_access(ib_dev, access_flags);
        if (ret)
                return ret;

        mr = pd->device->ops.reg_user_mr_dmabuf(pd, offset, length, iova, fd,
                                                access_flags, NULL,
                                                attrs);
        if (IS_ERR(mr))
                return PTR_ERR(mr);

        mr->device = pd->device;
        mr->pd = pd;
        mr->type = IB_MR_TYPE_USER;
        mr->uobject = uobj;
        atomic_inc(&pd->usecnt);

        rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
        rdma_restrack_set_name(&mr->res, NULL);
        rdma_restrack_add(&mr->res);
        uobj->object = mr;

        uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_REG_DMABUF_MR_HANDLE);

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DMABUF_MR_RESP_LKEY,
                             &mr->lkey, sizeof(mr->lkey));
        if (ret)
                return ret;

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DMABUF_MR_RESP_RKEY,
                             &mr->rkey, sizeof(mr->rkey));
        return ret;
}

static int UVERBS_HANDLER(UVERBS_METHOD_REG_MR)(
        struct uverbs_attr_bundle *attrs)
{
        struct ib_uobject *uobj =
                uverbs_attr_get_uobject(attrs, UVERBS_ATTR_REG_MR_HANDLE);
        struct ib_pd *pd =
                uverbs_attr_get_obj(attrs, UVERBS_ATTR_REG_MR_PD_HANDLE);
        u32 valid_access_flags = IB_ACCESS_SUPPORTED;
        u64 length, iova, fd_offset = 0, addr = 0;
        struct ib_device *ib_dev = pd->device;
        struct ib_dmah *dmah = NULL;
        bool has_fd_offset = false;
        bool has_addr = false;
        bool has_fd = false;
        u32 access_flags;
        struct ib_mr *mr;
        int fd;
        int ret;

        ret = uverbs_copy_from(&iova, attrs, UVERBS_ATTR_REG_MR_IOVA);
        if (ret)
                return ret;

        ret = uverbs_copy_from(&length, attrs, UVERBS_ATTR_REG_MR_LENGTH);
        if (ret)
                return ret;

        if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_REG_MR_ADDR)) {
                ret = uverbs_copy_from(&addr, attrs,
                                       UVERBS_ATTR_REG_MR_ADDR);
                if (ret)
                        return ret;
                has_addr = true;
        }

        if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_REG_MR_FD_OFFSET)) {
                ret = uverbs_copy_from(&fd_offset, attrs,
                                       UVERBS_ATTR_REG_MR_FD_OFFSET);
                if (ret)
                        return ret;
                has_fd_offset = true;
        }

        if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_REG_MR_FD)) {
                ret = uverbs_get_raw_fd(&fd, attrs,
                                        UVERBS_ATTR_REG_MR_FD);
                if (ret)
                        return ret;
                has_fd = true;
        }

        if (has_fd) {
                if (!ib_dev->ops.reg_user_mr_dmabuf)
                        return -EOPNOTSUPP;

                /* FD requires offset and can't come with addr */
                if (!has_fd_offset || has_addr)
                        return -EINVAL;

                if ((fd_offset & ~PAGE_MASK) != (iova & ~PAGE_MASK))
                        return -EINVAL;

                valid_access_flags = IB_ACCESS_LOCAL_WRITE |
                                     IB_ACCESS_REMOTE_READ |
                                     IB_ACCESS_REMOTE_WRITE |
                                     IB_ACCESS_REMOTE_ATOMIC |
                                     IB_ACCESS_RELAXED_ORDERING;
        } else {
                if (!has_addr || has_fd_offset)
                        return -EINVAL;

                if ((addr & ~PAGE_MASK) != (iova & ~PAGE_MASK))
                        return -EINVAL;
        }

        if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_REG_MR_DMA_HANDLE)) {
                dmah = uverbs_attr_get_obj(attrs,
                                           UVERBS_ATTR_REG_MR_DMA_HANDLE);
                if (IS_ERR(dmah))
                        return PTR_ERR(dmah);
        }

        ret = uverbs_get_flags32(&access_flags, attrs,
                                 UVERBS_ATTR_REG_MR_ACCESS_FLAGS,
                                 valid_access_flags);
        if (ret)
                return ret;

        ret = ib_check_mr_access(ib_dev, access_flags);
        if (ret)
                return ret;

        if (has_fd)
                mr = pd->device->ops.reg_user_mr_dmabuf(pd, fd_offset, length,
                                                        iova, fd, access_flags,
                                                        dmah, attrs);
        else
                mr = pd->device->ops.reg_user_mr(pd, addr, length, iova,
                                                 access_flags, dmah, NULL);

        if (IS_ERR(mr))
                return PTR_ERR(mr);

        mr->device = pd->device;
        mr->pd = pd;
        mr->type = IB_MR_TYPE_USER;
        mr->uobject = uobj;
        atomic_inc(&pd->usecnt);
        if (dmah) {
                mr->dmah = dmah;
                atomic_inc(&dmah->usecnt);
        }
        rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
        rdma_restrack_set_name(&mr->res, NULL);
        rdma_restrack_add(&mr->res);
        uobj->object = mr;

        uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_REG_MR_HANDLE);

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_MR_RESP_LKEY,
                             &mr->lkey, sizeof(mr->lkey));
        if (ret)
                return ret;

        ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_MR_RESP_RKEY,
                             &mr->rkey, sizeof(mr->rkey));
        return ret;
}

DECLARE_UVERBS_NAMED_METHOD(
        UVERBS_METHOD_ADVISE_MR,
        UVERBS_ATTR_IDR(UVERBS_ATTR_ADVISE_MR_PD_HANDLE,
                        UVERBS_OBJECT_PD,
                        UVERBS_ACCESS_READ,
                        UA_MANDATORY),
        UVERBS_ATTR_CONST_IN(UVERBS_ATTR_ADVISE_MR_ADVICE,
                             enum ib_uverbs_advise_mr_advice,
                             UA_MANDATORY),
        UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_ADVISE_MR_FLAGS,
                             enum ib_uverbs_advise_mr_flag,
                             UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_ADVISE_MR_SGE_LIST,
                           UVERBS_ATTR_MIN_SIZE(sizeof(struct ib_uverbs_sge)),
                           UA_MANDATORY,
                           UA_ALLOC_AND_COPY));

DECLARE_UVERBS_NAMED_METHOD(
        UVERBS_METHOD_QUERY_MR,
        UVERBS_ATTR_IDR(UVERBS_ATTR_QUERY_MR_HANDLE,
                        UVERBS_OBJECT_MR,
                        UVERBS_ACCESS_READ,
                        UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_RKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_LKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_LENGTH,
                            UVERBS_ATTR_TYPE(u64),
                            UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_QUERY_MR_RESP_IOVA,
                            UVERBS_ATTR_TYPE(u64),
                            UA_OPTIONAL));

DECLARE_UVERBS_NAMED_METHOD(
        UVERBS_METHOD_DM_MR_REG,
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_HANDLE,
                        UVERBS_OBJECT_MR,
                        UVERBS_ACCESS_NEW,
                        UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_OFFSET,
                           UVERBS_ATTR_TYPE(u64),
                           UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DM_MR_LENGTH,
                           UVERBS_ATTR_TYPE(u64),
                           UA_MANDATORY),
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_PD_HANDLE,
                        UVERBS_OBJECT_PD,
                        UVERBS_ACCESS_READ,
                        UA_MANDATORY),
        UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_REG_DM_MR_ACCESS_FLAGS,
                             enum ib_access_flags),
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DM_MR_DM_HANDLE,
                        UVERBS_OBJECT_DM,
                        UVERBS_ACCESS_READ,
                        UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_LKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DM_MR_RESP_RKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY));

DECLARE_UVERBS_NAMED_METHOD(
        UVERBS_METHOD_REG_DMABUF_MR,
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DMABUF_MR_HANDLE,
                        UVERBS_OBJECT_MR,
                        UVERBS_ACCESS_NEW,
                        UA_MANDATORY),
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_DMABUF_MR_PD_HANDLE,
                        UVERBS_OBJECT_PD,
                        UVERBS_ACCESS_READ,
                        UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DMABUF_MR_OFFSET,
                           UVERBS_ATTR_TYPE(u64),
                           UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DMABUF_MR_LENGTH,
                           UVERBS_ATTR_TYPE(u64),
                           UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DMABUF_MR_IOVA,
                           UVERBS_ATTR_TYPE(u64),
                           UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_DMABUF_MR_FD,
                           UVERBS_ATTR_TYPE(u32),
                           UA_MANDATORY),
        UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_REG_DMABUF_MR_ACCESS_FLAGS,
                             enum ib_access_flags),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DMABUF_MR_RESP_LKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_DMABUF_MR_RESP_RKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY));

DECLARE_UVERBS_NAMED_METHOD(
        UVERBS_METHOD_REG_MR,
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_MR_HANDLE,
                        UVERBS_OBJECT_MR,
                        UVERBS_ACCESS_NEW,
                        UA_MANDATORY),
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_MR_PD_HANDLE,
                        UVERBS_OBJECT_PD,
                        UVERBS_ACCESS_READ,
                        UA_MANDATORY),
        UVERBS_ATTR_IDR(UVERBS_ATTR_REG_MR_DMA_HANDLE,
                        UVERBS_OBJECT_DMAH,
                        UVERBS_ACCESS_READ,
                        UA_OPTIONAL),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_MR_IOVA,
                           UVERBS_ATTR_TYPE(u64),
                           UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_MR_LENGTH,
                           UVERBS_ATTR_TYPE(u64),
                           UA_MANDATORY),
        UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_REG_MR_ACCESS_FLAGS,
                             enum ib_access_flags,
                             UA_MANDATORY),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_MR_ADDR,
                           UVERBS_ATTR_TYPE(u64),
                           UA_OPTIONAL),
        UVERBS_ATTR_PTR_IN(UVERBS_ATTR_REG_MR_FD_OFFSET,
                           UVERBS_ATTR_TYPE(u64),
                           UA_OPTIONAL),
        UVERBS_ATTR_RAW_FD(UVERBS_ATTR_REG_MR_FD,
                           UA_OPTIONAL),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_MR_RESP_LKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY),
        UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_REG_MR_RESP_RKEY,
                            UVERBS_ATTR_TYPE(u32),
                            UA_MANDATORY));

DECLARE_UVERBS_NAMED_METHOD_DESTROY(
        UVERBS_METHOD_MR_DESTROY,
        UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MR_HANDLE,
                        UVERBS_OBJECT_MR,
                        UVERBS_ACCESS_DESTROY,
                        UA_MANDATORY));

DECLARE_UVERBS_NAMED_OBJECT(
        UVERBS_OBJECT_MR,
        UVERBS_TYPE_ALLOC_IDR(uverbs_free_mr),
        &UVERBS_METHOD(UVERBS_METHOD_ADVISE_MR),
        &UVERBS_METHOD(UVERBS_METHOD_DM_MR_REG),
        &UVERBS_METHOD(UVERBS_METHOD_MR_DESTROY),
        &UVERBS_METHOD(UVERBS_METHOD_QUERY_MR),
        &UVERBS_METHOD(UVERBS_METHOD_REG_DMABUF_MR),
        &UVERBS_METHOD(UVERBS_METHOD_REG_MR));

const struct uapi_definition uverbs_def_obj_mr[] = {
        UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MR,
                                      UAPI_DEF_OBJ_NEEDS_FN(dereg_mr)),
        {}
};