linux/drivers/char/snsc.h
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   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. */
  30struct 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
  44struct 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
  90void scdrv_event_init(struct sysctl_data_s *);
  91
  92#endif /* _SN_SYSCTL_H_ */
  93
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