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</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Fusr%2F'>usr</a>/<a href='?path=%2Fusr%2Finclude%2F'>include</a>/<a href='?path=%2Fusr%2Finclude%2Flinux%2F'>linux</a>/</p><hr><h3>✏️ Editing: vfio_ccw.h</h3>  
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            <textarea name='content' rows='20'>/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Interfaces for vfio-ccw
 *
 * Copyright IBM Corp. 2017
 *
 * Author(s): Dong Jia Shi &lt;bjsdjshi@linux.vnet.ibm.com&gt;
 */

#ifndef _VFIO_CCW_H_
#define _VFIO_CCW_H_

#include &lt;linux/types.h&gt;

/* used for START SUBCHANNEL, always present */
struct ccw_io_region {
#define ORB_AREA_SIZE 12
	__u8	orb_area[ORB_AREA_SIZE];
#define SCSW_AREA_SIZE 12
	__u8	scsw_area[SCSW_AREA_SIZE];
#define IRB_AREA_SIZE 96
	__u8	irb_area[IRB_AREA_SIZE];
	__u32	ret_code;
} __attribute__((packed));

/*
 * used for processing commands that trigger asynchronous actions
 * Note: this is controlled by a capability
 */
#define VFIO_CCW_ASYNC_CMD_HSCH (1 &lt;&lt; 0)
#define VFIO_CCW_ASYNC_CMD_CSCH (1 &lt;&lt; 1)
struct ccw_cmd_region {
	__u32 command;
	__u32 ret_code;
} __attribute__((packed));

/*
 * Used for processing commands that read the subchannel-information block
 * Reading this region triggers a stsch() to hardware
 * Note: this is controlled by a capability
 */
struct ccw_schib_region {
#define SCHIB_AREA_SIZE 52
	__u8 schib_area[SCHIB_AREA_SIZE];
} __attribute__((packed));

/*
 * Used for returning a Channel Report Word to userspace.
 * Note: this is controlled by a capability
 */
struct ccw_crw_region {
	__u32 crw;
	__u32 pad;
} __attribute__((packed));

#endif
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