2 * SN Platform system controller communication support
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
12 * This file contains macros and data types for communication with the
13 * system controllers in SGI SN systems.
19 #include <linux/types.h>
20 #include <linux/spinlock.h>
21 #include <linux/wait.h>
22 #include <linux/kobject.h>
24 #include <linux/cdev.h>
25 #include <asm/sn/types.h>
26 #include <asm/semaphore.h>
30 /* This structure is used to track an open subchannel. */
32 nasid_t sd_nasid; /* node on which the subchannel was opened */
33 int sd_subch; /* subchannel number */
34 spinlock_t sd_rlock; /* monitor lock for rsv */
35 spinlock_t sd_wlock; /* monitor lock for wsv */
36 wait_queue_head_t sd_rq; /* wait queue for readers */
37 wait_queue_head_t sd_wq; /* wait queue for writers */
38 struct semaphore sd_rbs; /* semaphore for read buffer */
39 struct semaphore sd_wbs; /* semaphore for write buffer */
41 char sd_rb[CHUNKSIZE]; /* read buffer */
42 char sd_wb[CHUNKSIZE]; /* write buffer */
45 struct sysctl_data_s {
46 struct cdev scd_cdev; /* Character device info */
47 nasid_t scd_nasid; /* Node on which subchannels are opened. */
50 #endif /* _SN_SYSCTL_H_ */