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/*
* SN Platform system controller communication support
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
*/
/*
* This file contains macros and data types for communication with the
* system controllers in SGI SN systems.
*/
#ifndef _SN_SYSCTL_H_
#define _SN_SYSCTL_H_
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/kobject.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <asm/sn/types.h>
#include <asm/semaphore.h>
#define CHUNKSIZE 127
/* This structure is used to track an open subchannel. */
struct subch_data_s {
nasid_t sd_nasid; /* node on which the subchannel was opened */
int sd_subch; /* subchannel number */
spinlock_t sd_rlock; /* monitor lock for rsv */
spinlock_t sd_wlock; /* monitor lock for wsv */
wait_queue_head_t sd_rq; /* wait queue for readers */
wait_queue_head_t sd_wq; /* wait queue for writers */
struct semaphore sd_rbs; /* semaphore for read buffer */
struct semaphore sd_wbs; /* semaphore for write buffer */
char sd_rb[CHUNKSIZE]; /* read buffer */
char sd_wb[CHUNKSIZE]; /* write buffer */
};
struct sysctl_data_s {
struct cdev scd_cdev; /* Character device info */
nasid_t scd_nasid; /* Node on which subchannels are opened. */
};
#endif /* _SN_SYSCTL_H_ */
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