diff options
Diffstat (limited to 'drivers/char/snsc.h')
| -rw-r--r-- | drivers/char/snsc.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/char/snsc.h b/drivers/char/snsc.h new file mode 100644 index 000000000000..c22c6c55e254 --- /dev/null +++ b/drivers/char/snsc.h @@ -0,0 +1,50 @@ +/* + * 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_ */ |