ia64/linux-2.6.18-xen.hg

view drivers/char/snsc.h @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
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 */
11 /*
12 * This file contains macros and data types for communication with the
13 * system controllers in SGI SN systems.
14 */
16 #ifndef _SN_SYSCTL_H_
17 #define _SN_SYSCTL_H_
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>
28 #define CHUNKSIZE 127
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 */
41 char sd_rb[CHUNKSIZE]; /* read buffer */
42 char sd_wb[CHUNKSIZE]; /* write buffer */
43 };
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 };
51 /* argument types */
52 #define IR_ARG_INT 0x00 /* 4-byte integer (big-endian) */
53 #define IR_ARG_ASCII 0x01 /* null-terminated ASCII string */
54 #define IR_ARG_UNKNOWN 0x80 /* unknown data type. The low
55 * 7 bits will contain the data
56 * length. */
57 #define IR_ARG_UNKNOWN_LENGTH_MASK 0x7f
60 /* system controller event codes */
61 #define EV_CLASS_MASK 0xf000ul
62 #define EV_SEVERITY_MASK 0x0f00ul
63 #define EV_COMPONENT_MASK 0x00fful
65 #define EV_CLASS_POWER 0x1000ul
66 #define EV_CLASS_FAN 0x2000ul
67 #define EV_CLASS_TEMP 0x3000ul
68 #define EV_CLASS_ENV 0x4000ul
69 #define EV_CLASS_TEST_FAULT 0x5000ul
70 #define EV_CLASS_TEST_WARNING 0x6000ul
71 #define EV_CLASS_PWRD_NOTIFY 0x8000ul
73 /* ENV class codes */
74 #define ENV_PWRDN_PEND 0x4101ul
76 #define EV_SEVERITY_POWER_STABLE 0x0000ul
77 #define EV_SEVERITY_POWER_LOW_WARNING 0x0100ul
78 #define EV_SEVERITY_POWER_HIGH_WARNING 0x0200ul
79 #define EV_SEVERITY_POWER_HIGH_FAULT 0x0300ul
80 #define EV_SEVERITY_POWER_LOW_FAULT 0x0400ul
82 #define EV_SEVERITY_FAN_STABLE 0x0000ul
83 #define EV_SEVERITY_FAN_WARNING 0x0100ul
84 #define EV_SEVERITY_FAN_FAULT 0x0200ul
86 #define EV_SEVERITY_TEMP_STABLE 0x0000ul
87 #define EV_SEVERITY_TEMP_ADVISORY 0x0100ul
88 #define EV_SEVERITY_TEMP_CRITICAL 0x0200ul
89 #define EV_SEVERITY_TEMP_FAULT 0x0300ul
91 void scdrv_event_init(struct sysctl_data_s *);
93 #endif /* _SN_SYSCTL_H_ */