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