The C and C++ Include Header Files

/usr/include/linux/vfio_ccw.h


$ cat -n /usr/include/linux/vfio_ccw.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	/*
     3	 * Interfaces for vfio-ccw
     4	 *
     5	 * Copyright IBM Corp. 2017
     6	 *
     7	 * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
     8	 */
     9	
    10	#ifndef _VFIO_CCW_H_
    11	#define _VFIO_CCW_H_
    12	
    13	#include <linux/types.h>
    14	
    15	/* used for START SUBCHANNEL, always present */
    16	struct ccw_io_region {
    17	#define ORB_AREA_SIZE 12
    18		__u8	orb_area[ORB_AREA_SIZE];
    19	#define SCSW_AREA_SIZE 12
    20		__u8	scsw_area[SCSW_AREA_SIZE];
    21	#define IRB_AREA_SIZE 96
    22		__u8	irb_area[IRB_AREA_SIZE];
    23		__u32	ret_code;
    24	} __attribute__((packed));
    25	
    26	/*
    27	 * used for processing commands that trigger asynchronous actions
    28	 * Note: this is controlled by a capability
    29	 */
    30	#define VFIO_CCW_ASYNC_CMD_HSCH (1 << 0)
    31	#define VFIO_CCW_ASYNC_CMD_CSCH (1 << 1)
    32	struct ccw_cmd_region {
    33		__u32 command;
    34		__u32 ret_code;
    35	} __attribute__((packed));
    36	
    37	/*
    38	 * Used for processing commands that read the subchannel-information block
    39	 * Reading this region triggers a stsch() to hardware
    40	 * Note: this is controlled by a capability
    41	 */
    42	struct ccw_schib_region {
    43	#define SCHIB_AREA_SIZE 52
    44		__u8 schib_area[SCHIB_AREA_SIZE];
    45	} __attribute__((packed));
    46	
    47	/*
    48	 * Used for returning a Channel Report Word to userspace.
    49	 * Note: this is controlled by a capability
    50	 */
    51	struct ccw_crw_region {
    52		__u32 crw;
    53		__u32 pad;
    54	} __attribute__((packed));
    55	
    56	#endif