cregit-Linux how code gets into the kernel

Release 4.17 include/uapi/rdma/rdma_user_ioctl_cmds.h

/*
 * Copyright (c) 2018, Mellanox Technologies inc.  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
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef RDMA_USER_IOCTL_CMDS_H

#define RDMA_USER_IOCTL_CMDS_H

#include <linux/types.h>
#include <linux/ioctl.h>

/* Documentation/ioctl/ioctl-number.txt */

#define RDMA_IOCTL_MAGIC	0x1b

#define RDMA_VERBS_IOCTL \
	_IOWR(RDMA_IOCTL_MAGIC, 1, struct ib_uverbs_ioctl_hdr)


enum {
	/* User input */
	
UVERBS_ATTR_F_MANDATORY = 1U << 0,
	/*
         * Valid output bit should be ignored and considered set in
         * mandatory fields. This bit is kernel output.
         */
	
UVERBS_ATTR_F_VALID_OUTPUT = 1U << 1,
};


struct ib_uverbs_attr {
	
__u16 attr_id;		/* command specific type attribute */
	
__u16 len;		/* only for pointers */
	
__u16 flags;		/* combination of UVERBS_ATTR_F_XXXX */
	
union {
		
struct {
			
__u8 elem_id;
			
__u8 reserved;
		
} enum_data;
		
__u16 reserved;
	
} attr_data;
	
__aligned_u64 data;	/* ptr to command, inline data or idr/fd */
};


struct ib_uverbs_ioctl_hdr {
	
__u16 length;
	
__u16 object_id;
	
__u16 method_id;
	
__u16 num_attrs;
	
__aligned_u64 reserved1;
	
__u32 driver_id;
	
__u32 reserved2;
	
struct ib_uverbs_attr  attrs[0];
};


enum rdma_driver_id {
	
RDMA_DRIVER_UNKNOWN,
	
RDMA_DRIVER_MLX5,
	
RDMA_DRIVER_MLX4,
	
RDMA_DRIVER_CXGB3,
	
RDMA_DRIVER_CXGB4,
	
RDMA_DRIVER_MTHCA,
	
RDMA_DRIVER_BNXT_RE,
	
RDMA_DRIVER_OCRDMA,
	
RDMA_DRIVER_NES,
	
RDMA_DRIVER_I40IW,
	
RDMA_DRIVER_VMW_PVRDMA,
	
RDMA_DRIVER_QEDR,
	
RDMA_DRIVER_HNS,
	
RDMA_DRIVER_USNIC,
	
RDMA_DRIVER_RXE,
	
RDMA_DRIVER_HFI1,
	
RDMA_DRIVER_QIB,
};

#endif

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