| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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_ */ |