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1da177e4 LT |
1 | /* |
2 | * SN Platform system controller communication support | |
3 | * | |
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 | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved. | |
9 | */ | |
10 | ||
11 | /* | |
12 | * This file contains macros and data types for communication with the | |
13 | * system controllers in SGI SN systems. | |
14 | */ | |
15 | ||
16 | #ifndef _SN_SYSCTL_H_ | |
17 | #define _SN_SYSCTL_H_ | |
18 | ||
19 | #include <linux/types.h> | |
20 | #include <linux/spinlock.h> | |
21 | #include <linux/wait.h> | |
22 | #include <linux/kobject.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/cdev.h> | |
25 | #include <asm/sn/types.h> | |
26 | #include <asm/semaphore.h> | |
27 | ||
28 | #define CHUNKSIZE 127 | |
29 | ||
30 | /* This structure is used to track an open subchannel. */ | |
31 | struct subch_data_s { | |
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 */ | |
40 | ||
41 | char sd_rb[CHUNKSIZE]; /* read buffer */ | |
42 | char sd_wb[CHUNKSIZE]; /* write buffer */ | |
43 | }; | |
44 | ||
45 | struct sysctl_data_s { | |
46 | struct cdev scd_cdev; /* Character device info */ | |
47 | nasid_t scd_nasid; /* Node on which subchannels are opened. */ | |
48 | }; | |
49 | ||
50 | #endif /* _SN_SYSCTL_H_ */ |