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_ */