Add uverbs command for registering user memory region associated
with a dma-buf file descriptor.
Signed-off-by: Jianxin Xiong <jianxin.xiong@xxxxxxxxx>
Reviewed-by: Sean Hefty <sean.hefty@xxxxxxxxx>
Acked-by: Michael J. Ruhl <michael.j.ruhl@xxxxxxxxx>
---
drivers/infiniband/core/uverbs_std_types_mr.c | 115 ++++++++++++++++++++++++++
include/uapi/rdma/ib_user_ioctl_cmds.h | 14 ++++
2 files changed, 129 insertions(+)
diff --git a/drivers/infiniband/core/uverbs_std_types_mr.c b/drivers/infiniband/core/uverbs_std_types_mr.c
index 9b22bb5..388364a 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 +179,88 @@ 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;
+
+ struct ib_user_mr_attr user_mr_attr;
+ struct ib_mr *mr;
+ int ret;
+
+ if (!ib_dev->ops.reg_user_mr)
+ return -EOPNOTSUPP;
+
+ if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
+ return -EOPNOTSUPP;
+
+ ret = uverbs_copy_from(&user_mr_attr.start, attrs,
+ UVERBS_ATTR_REG_DMABUF_MR_ADDR);
+ if (ret)
+ return ret;
+
+ ret = uverbs_copy_from(&user_mr_attr.length, attrs,
+ UVERBS_ATTR_REG_DMABUF_MR_LENGTH);
+ if (ret)
+ return ret;
+
+ ret = uverbs_copy_from(&user_mr_attr.virt_addr, attrs,
+ UVERBS_ATTR_REG_DMABUF_MR_HCA_VA);
+ if (ret)
+ return ret;
+
+ ret = uverbs_copy_from(&user_mr_attr.fd, attrs,
+ UVERBS_ATTR_REG_DMABUF_MR_FD);
+ if (ret)
+ return ret;
+
+ ret = uverbs_get_flags32(&user_mr_attr.access_flags, attrs,
+ UVERBS_ATTR_REG_DMABUF_MR_ACCESS_FLAGS,
+ IB_ACCESS_SUPPORTED);
+ if (ret)
+ return ret;
+
+ user_mr_attr.access_flags |= IB_ACCESS_DMABUF;
+
+ ret = ib_check_mr_access(user_mr_attr.access_flags);
+ if (ret)
+ return ret;
+
+ mr = pd->device->ops.reg_user_mr(pd, &user_mr_attr,
+ &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;
+
+ ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DMABUF_MR_RESP_LKEY,
+ &mr->lkey, sizeof(mr->lkey));
+ if (ret)
+ goto err_dereg;
+
+ ret = uverbs_copy_to(attrs, UVERBS_ATTR_REG_DMABUF_MR_RESP_RKEY,
+ &mr->rkey, sizeof(mr->rkey));
+ if (ret)
+ goto err_dereg;
+
+ return 0;
+
+err_dereg:
+ ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs));
+
+ return ret;
+}
+
DECLARE_UVERBS_NAMED_METHOD(
UVERBS_METHOD_ADVISE_MR,
UVERBS_ATTR_IDR(UVERBS_ATTR_ADVISE_MR_PD_HANDLE,
@@ -243,6 +326,37 @@ 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_ADDR,
+ 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_HCA_VA,
+ 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,
@@ -253,6 +367,7 @@ 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_REG_DMABUF_MR),
&UVERBS_METHOD(UVERBS_METHOD_DM_MR_REG),
&UVERBS_METHOD(UVERBS_METHOD_MR_DESTROY),
&UVERBS_METHOD(UVERBS_METHOD_ADVISE_MR),
diff --git a/include/uapi/rdma/ib_user_ioctl_cmds.h b/include/uapi/rdma/ib_user_ioctl_cmds.h
index 99dcabf..6fd3324 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
@@ -249,6 +250,7 @@ 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 {
@@ -270,6 +272,18 @@ 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_ADDR,
+ UVERBS_ATTR_REG_DMABUF_MR_LENGTH,
+ UVERBS_ATTR_REG_DMABUF_MR_HCA_VA,
+ 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
