Merge branch 'drm-intel-fixes' of ssh://master.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6.git] / drivers / char / snsc.h
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) 2004-2006 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/fs.h>
23 #include <linux/cdev.h>
24 #include <linux/semaphore.h>
25 #include <asm/sn/types.h>
26
27 #define CHUNKSIZE 127
28
29 /* This structure is used to track an open subchannel. */
30 struct subch_data_s {
31         nasid_t sd_nasid;       /* node on which the subchannel was opened */
32         int sd_subch;           /* subchannel number */
33         spinlock_t sd_rlock;    /* monitor lock for rsv */
34         spinlock_t sd_wlock;    /* monitor lock for wsv */
35         wait_queue_head_t sd_rq;        /* wait queue for readers */
36         wait_queue_head_t sd_wq;        /* wait queue for writers */
37         struct semaphore sd_rbs;        /* semaphore for read buffer */
38         struct semaphore sd_wbs;        /* semaphore for write buffer */
39
40         char sd_rb[CHUNKSIZE];  /* read buffer */
41         char sd_wb[CHUNKSIZE];  /* write buffer */
42 };
43
44 struct sysctl_data_s {
45         struct cdev scd_cdev;   /* Character device info */
46         nasid_t scd_nasid;      /* Node on which subchannels are opened. */
47 };
48
49
50 /* argument types */
51 #define IR_ARG_INT              0x00    /* 4-byte integer (big-endian)  */
52 #define IR_ARG_ASCII            0x01    /* null-terminated ASCII string */
53 #define IR_ARG_UNKNOWN          0x80    /* unknown data type.  The low
54                                          * 7 bits will contain the data
55                                          * length.                      */
56 #define IR_ARG_UNKNOWN_LENGTH_MASK      0x7f
57
58
59 /* system controller event codes */
60 #define EV_CLASS_MASK           0xf000ul
61 #define EV_SEVERITY_MASK        0x0f00ul
62 #define EV_COMPONENT_MASK       0x00fful
63
64 #define EV_CLASS_POWER          0x1000ul
65 #define EV_CLASS_FAN            0x2000ul
66 #define EV_CLASS_TEMP           0x3000ul
67 #define EV_CLASS_ENV            0x4000ul
68 #define EV_CLASS_TEST_FAULT     0x5000ul
69 #define EV_CLASS_TEST_WARNING   0x6000ul
70 #define EV_CLASS_PWRD_NOTIFY    0x8000ul
71
72 /* ENV class codes */
73 #define ENV_PWRDN_PEND          0x4101ul
74
75 #define EV_SEVERITY_POWER_STABLE        0x0000ul
76 #define EV_SEVERITY_POWER_LOW_WARNING   0x0100ul
77 #define EV_SEVERITY_POWER_HIGH_WARNING  0x0200ul
78 #define EV_SEVERITY_POWER_HIGH_FAULT    0x0300ul
79 #define EV_SEVERITY_POWER_LOW_FAULT     0x0400ul
80
81 #define EV_SEVERITY_FAN_STABLE          0x0000ul
82 #define EV_SEVERITY_FAN_WARNING         0x0100ul
83 #define EV_SEVERITY_FAN_FAULT           0x0200ul
84
85 #define EV_SEVERITY_TEMP_STABLE         0x0000ul
86 #define EV_SEVERITY_TEMP_ADVISORY       0x0100ul
87 #define EV_SEVERITY_TEMP_CRITICAL       0x0200ul
88 #define EV_SEVERITY_TEMP_FAULT          0x0300ul
89
90 void scdrv_event_init(struct sysctl_data_s *);
91
92 #endif /* _SN_SYSCTL_H_ */