[linux.git] / drivers / s390 / char / vmcp.h

/*
 * Copyright (C) 2004, 2005 IBM Corporation
 * Interface implementation for communication with the z/VM control program
 * Version 1.0
 * Author(s): Christian Borntraeger <[email protected]>
 *
 *
 * z/VMs CP offers the possibility to issue commands via the diagnose code 8
 * this driver implements a character device that issues these commands and
 * returns the answer of CP.
 *
 * The idea of this driver is based on cpint from Neale Ferguson
 */

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

#define VMCP_GETCODE _IOR(0x10, 1, int)
#define VMCP_SETBUF _IOW(0x10, 2, int)
#define VMCP_GETSIZE _IOR(0x10, 3, int)

struct vmcp_session {
	unsigned int bufsize;
	char *response;
	int resp_size;
	int resp_code;
	/* As we use copy_from/to_user, which might     *
	 * sleep and cannot use a spinlock              */
	struct mutex mutex;
};
Commit	Line	Data
6b979de3 CB	1	/*
6b979de3 CB	2	* Copyright (C) 2004, 2005 IBM Corporation
45af3af8	3	* Interface implementation for communication with the z/VM control program
6b979de3 CB	4	* Version 1.0
	5	* Author(s): Christian Borntraeger <[email protected]>
	6	*
	7	*
	8	* z/VMs CP offers the possibility to issue commands via the diagnose code 8
	9	* this driver implements a character device that issues these commands and
	10	* returns the answer of CP.
	11	*
	12	* The idea of this driver is based on cpint from Neale Ferguson
	13	*/
	14
6b979de3	15	#include <linux/ioctl.h>
d9d119f1	16	#include <linux/mutex.h>
6b979de3 CB	17
	18	#define VMCP_GETCODE _IOR(0x10, 1, int)
	19	#define VMCP_SETBUF _IOW(0x10, 2, int)
	20	#define VMCP_GETSIZE _IOR(0x10, 3, int)
	21
	22	struct vmcp_session {
	23	unsigned int bufsize;
	24	char *response;
	25	int resp_size;
	26	int resp_code;
	27	/* As we use copy_from/to_user, which might *
	28	* sleep and cannot use a spinlock */
d9d119f1	29	struct mutex mutex;
6b979de3	30	};