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RDMA/uverbs: Add uverbs command for dma-buf based MR registration

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Implement a new uverbs ioctl method for memory registration with file
descriptor as an extra parameter.

Link: https://lore.kernel.org/r/1608067636-98073-4-git-send-email-jianxin.xiong@intel.com
Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Acked-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Acked-by: Christian Koenig <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jianxin Xiong 2020-12-15 13:27:15 -08:00 committed by Jason Gunthorpe
parent 3bc489e882
commit bfe0cc6eb2
2 changed files with 129 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

117
drivers/infiniband/core/uverbs_std_types_mr.c
View File

@ -1,5 +1,6 @@
/*
* 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
@ -182,6 +183,86 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_MR)(
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,
&attrs->driver_udata);
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);
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;
}
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_ADVISE_MR,
UVERBS_ATTR_IDR(UVERBS_ATTR_ADVISE_MR_PD_HANDLE,
@ -247,6 +328,37 @@ DECLARE_UVERBS_NAMED_METHOD(
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_DESTROY(
UVERBS_METHOD_MR_DESTROY,
UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MR_HANDLE,
@ -257,10 +369,11 @@ DECLARE_UVERBS_NAMED_METHOD_DESTROY(
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_ADVISE_MR),
&UVERBS_METHOD(UVERBS_METHOD_QUERY_MR));
&UVERBS_METHOD(UVERBS_METHOD_QUERY_MR),
&UVERBS_METHOD(UVERBS_METHOD_REG_DMABUF_MR));
const struct uapi_definition uverbs_def_obj_mr[] = {
UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MR,

14
include/uapi/rdma/ib_user_ioctl_cmds.h
View File

@ -1,5 +1,6 @@
/*
* 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
@ -251,6 +252,7 @@ enum uverbs_methods_mr {
UVERBS_METHOD_MR_DESTROY,
UVERBS_METHOD_ADVISE_MR,
UVERBS_METHOD_QUERY_MR,
UVERBS_METHOD_REG_DMABUF_MR,
};
enum uverbs_attrs_mr_destroy_ids {
@ -272,6 +274,18 @@ enum uverbs_attrs_query_mr_cmd_attr_ids {
UVERBS_ATTR_QUERY_MR_RESP_IOVA,
};
enum uverbs_attrs_reg_dmabuf_mr_cmd_attr_ids {
UVERBS_ATTR_REG_DMABUF_MR_HANDLE,
UVERBS_ATTR_REG_DMABUF_MR_PD_HANDLE,
UVERBS_ATTR_REG_DMABUF_MR_OFFSET,
UVERBS_ATTR_REG_DMABUF_MR_LENGTH,
UVERBS_ATTR_REG_DMABUF_MR_IOVA,
UVERBS_ATTR_REG_DMABUF_MR_FD,
UVERBS_ATTR_REG_DMABUF_MR_ACCESS_FLAGS,
UVERBS_ATTR_REG_DMABUF_MR_RESP_LKEY,
UVERBS_ATTR_REG_DMABUF_MR_RESP_RKEY,
};
enum uverbs_attrs_create_counters_cmd_attr_ids {
UVERBS_ATTR_CREATE_COUNTERS_HANDLE,
};