7c043e908a
Return a device UAR index for a given user index via the DEVX interface. Security note: The hardware protection mechanism works like this: Each device object that is subject to UAR doorbells (QP/SQ/CQ) gets a UAR ID (called uar_page in the device specification manual) upon its creation. Then upon doorbell, hardware fetches the object context for which the doorbell was rang, and validates that the UAR through which the DB was rang matches the UAR ID of the object. If no match the doorbell is silently ignored by the hardware. Of course, the user cannot ring a doorbell on a UAR that was not mapped to it. Now in devx, as the devx kernel does not manipulate the QP/SQ/CQ command mailboxes (except tagging them with UID), we expose to the user its UAR ID, so it can embed it in these objects in the expected specification format. So the only thing the user can do is hurt itself by creating a QP/SQ/CQ with a UAR ID other than his, and then in this case other users may ring a doorbell on its objects. The consequence of that will be that another user can schedule a QP/SQ of the buggy user for execution (just insert it to the hardware schedule queue or arm its CQ for event generation), no further harm is expected. Signed-off-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*
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* Copyright (c) 2018, Mellanox Technologies inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef MLX5_USER_IOCTL_CMDS_H
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#define MLX5_USER_IOCTL_CMDS_H
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#include <rdma/ib_user_ioctl_cmds.h>
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enum mlx5_ib_create_flow_action_attrs {
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/* This attribute belong to the driver namespace */
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MLX5_IB_ATTR_CREATE_FLOW_ACTION_FLAGS = (1U << UVERBS_ID_NS_SHIFT),
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};
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enum mlx5_ib_alloc_dm_attrs {
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MLX5_IB_ATTR_ALLOC_DM_RESP_START_OFFSET = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_ATTR_ALLOC_DM_RESP_PAGE_INDEX,
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};
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enum mlx5_ib_devx_methods {
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MLX5_IB_METHOD_DEVX_OTHER = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_METHOD_DEVX_QUERY_UAR,
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};
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enum mlx5_ib_devx_other_attrs {
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MLX5_IB_ATTR_DEVX_OTHER_CMD_IN = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_ATTR_DEVX_OTHER_CMD_OUT,
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};
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enum mlx5_ib_devx_obj_create_attrs {
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MLX5_IB_ATTR_DEVX_OBJ_CREATE_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_IN,
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MLX5_IB_ATTR_DEVX_OBJ_CREATE_CMD_OUT,
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};
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enum mlx5_ib_devx_query_uar_attrs {
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MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_ATTR_DEVX_QUERY_UAR_DEV_IDX,
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};
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enum mlx5_ib_devx_obj_destroy_attrs {
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MLX5_IB_ATTR_DEVX_OBJ_DESTROY_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
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};
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enum mlx5_ib_devx_obj_modify_attrs {
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MLX5_IB_ATTR_DEVX_OBJ_MODIFY_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_IN,
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MLX5_IB_ATTR_DEVX_OBJ_MODIFY_CMD_OUT,
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};
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enum mlx5_ib_devx_obj_query_attrs {
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MLX5_IB_ATTR_DEVX_OBJ_QUERY_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_IN,
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MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
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};
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enum mlx5_ib_devx_obj_methods {
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MLX5_IB_METHOD_DEVX_OBJ_CREATE = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
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MLX5_IB_METHOD_DEVX_OBJ_MODIFY,
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MLX5_IB_METHOD_DEVX_OBJ_QUERY,
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};
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enum mlx5_ib_devx_objects {
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MLX5_IB_OBJECT_DEVX = (1U << UVERBS_ID_NS_SHIFT),
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MLX5_IB_OBJECT_DEVX_OBJ,
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};
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#endif
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