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Methods sometimes need to get one attribute out of a group of pre-defined attributes. This is an enum-like behavior. Since this is a common requirement, we add a new ENUM attribute to the generic uverbs ioctl() layer. This attribute is embedded in methods, like any other attributes we currently have. ENUM attributes point to an array of standard UVERBS_ATTR_PTR_IN. The user-space encodes the enum's attribute id in the id field and the internal PTR_IN attr id in the enum_data.elem_id field. This ENUM attribute could be shared by several attributes and it can get UVERBS_ATTR_SPEC_F_MANDATORY flag, stating this attribute must be supported by the kernel, like any other attribute. Reviewed-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
100 lines
2.8 KiB
C
100 lines
2.8 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 RDMA_USER_IOCTL_CMDS_H
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#define RDMA_USER_IOCTL_CMDS_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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/* Documentation/ioctl/ioctl-number.txt */
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#define RDMA_IOCTL_MAGIC 0x1b
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#define RDMA_VERBS_IOCTL \
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_IOWR(RDMA_IOCTL_MAGIC, 1, struct ib_uverbs_ioctl_hdr)
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enum {
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/* User input */
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UVERBS_ATTR_F_MANDATORY = 1U << 0,
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/*
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* Valid output bit should be ignored and considered set in
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* mandatory fields. This bit is kernel output.
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*/
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UVERBS_ATTR_F_VALID_OUTPUT = 1U << 1,
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};
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struct ib_uverbs_attr {
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__u16 attr_id; /* command specific type attribute */
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__u16 len; /* only for pointers */
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__u16 flags; /* combination of UVERBS_ATTR_F_XXXX */
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union {
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struct {
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__u8 elem_id;
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__u8 reserved;
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} enum_data;
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__u16 reserved;
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} attr_data;
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__aligned_u64 data; /* ptr to command, inline data or idr/fd */
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};
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struct ib_uverbs_ioctl_hdr {
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__u16 length;
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__u16 object_id;
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__u16 method_id;
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__u16 num_attrs;
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__aligned_u64 reserved1;
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__u32 driver_id;
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__u32 reserved2;
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struct ib_uverbs_attr attrs[0];
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};
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enum rdma_driver_id {
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RDMA_DRIVER_UNKNOWN,
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RDMA_DRIVER_MLX5,
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RDMA_DRIVER_MLX4,
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RDMA_DRIVER_CXGB3,
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RDMA_DRIVER_CXGB4,
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RDMA_DRIVER_MTHCA,
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RDMA_DRIVER_BNXT_RE,
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RDMA_DRIVER_OCRDMA,
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RDMA_DRIVER_NES,
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RDMA_DRIVER_I40IW,
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RDMA_DRIVER_VMW_PVRDMA,
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RDMA_DRIVER_QEDR,
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RDMA_DRIVER_HNS,
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RDMA_DRIVER_USNIC,
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RDMA_DRIVER_RXE,
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RDMA_DRIVER_HFI1,
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RDMA_DRIVER_QIB,
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};
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#endif
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