[PATCH v11 3/4] RDMA/uverbs: Add uverbs command for dma-buf based MR registration
Jianxin Xiong
jianxin.xiong at intel.com
Mon Nov 23 17:51:58 UTC 2020
Implement a new uverbs ioctl method for memory registration with file
descriptor as an extra parameter.
Signed-off-by: Jianxin Xiong <jianxin.xiong at intel.com>
Reviewed-by: Sean Hefty <sean.hefty at intel.com>
Acked-by: Michael J. Ruhl <michael.j.ruhl at intel.com>
Acked-by: Christian Koenig <christian.koenig at amd.com>
Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/infiniband/core/uverbs_std_types_mr.c | 114 +++++++++++++++++++++++++-
include/uapi/rdma/ib_user_ioctl_cmds.h | 14 ++++
2 files changed, 126 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/core/uverbs_std_types_mr.c b/drivers/infiniband/core/uverbs_std_types_mr.c
index 9b22bb5..e9028ea 100644
--- a/drivers/infiniband/core/uverbs_std_types_mr.c
+++ b/drivers/infiniband/core/uverbs_std_types_mr.c
@@ -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
@@ -178,6 +179,83 @@ 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, virt_addr;
+ 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(&virt_addr, attrs,
+ UVERBS_ATTR_REG_DMABUF_MR_IOVA);
+ if (ret)
+ return ret;
+
+ 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(access_flags);
+ if (ret)
+ return ret;
+
+ mr = pd->device->ops.reg_user_mr_dmabuf(pd, offset, length, virt_addr,
+ 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,
@@ -243,6 +321,37 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_MR)(
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,
@@ -253,10 +362,11 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_MR)(
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,
diff --git a/include/uapi/rdma/ib_user_ioctl_cmds.h b/include/uapi/rdma/ib_user_ioctl_cmds.h
index 7968a18..dafc7eb 100644
--- a/include/uapi/rdma/ib_user_ioctl_cmds.h
+++ b/include/uapi/rdma/ib_user_ioctl_cmds.h
@@ -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,
};
--
1.8.3.1
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