2005-06-25 15:55:32 -06:00
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/*
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* Copyright (C) 2004, 2005 IBM Corporation
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2006-09-20 07:59:24 -06:00
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* Interface implementation for communication with the z/VM control program
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2005-06-25 15:55:32 -06:00
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* Version 1.0
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* Author(s): Christian Borntraeger <cborntra@de.ibm.com>
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*
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*
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* z/VMs CP offers the possibility to issue commands via the diagnose code 8
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* this driver implements a character device that issues these commands and
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* returns the answer of CP.
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*
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* The idea of this driver is based on cpint from Neale Ferguson
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*/
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#include <asm/semaphore.h>
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#include <linux/ioctl.h>
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#define VMCP_GETCODE _IOR(0x10, 1, int)
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#define VMCP_SETBUF _IOW(0x10, 2, int)
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#define VMCP_GETSIZE _IOR(0x10, 3, int)
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struct vmcp_session {
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unsigned int bufsize;
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char *response;
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int resp_size;
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int resp_code;
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/* As we use copy_from/to_user, which might *
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* sleep and cannot use a spinlock */
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struct semaphore mutex;
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};
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