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snsc.h

/*
 * SN Platform system controller communication support
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
 */

/*
 * This file contains macros and data types for communication with the
 * system controllers in SGI SN systems.
 */

#ifndef _SN_SYSCTL_H_
#define _SN_SYSCTL_H_

#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
#include <linux/kobject.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <asm/sn/types.h>
#include <asm/semaphore.h>

#define CHUNKSIZE 127

/* This structure is used to track an open subchannel. */
struct subch_data_s {
      nasid_t sd_nasid; /* node on which the subchannel was opened */
      int sd_subch;           /* subchannel number */
      spinlock_t sd_rlock;    /* monitor lock for rsv */
      spinlock_t sd_wlock;    /* monitor lock for wsv */
      wait_queue_head_t sd_rq;      /* wait queue for readers */
      wait_queue_head_t sd_wq;      /* wait queue for writers */
      struct semaphore sd_rbs;      /* semaphore for read buffer */
      struct semaphore sd_wbs;      /* semaphore for write buffer */

      char sd_rb[CHUNKSIZE];  /* read buffer */
      char sd_wb[CHUNKSIZE];  /* write buffer */
};

struct sysctl_data_s {
      struct cdev scd_cdev;   /* Character device info */
      nasid_t scd_nasid;      /* Node on which subchannels are opened. */
};


/* argument types */
#define IR_ARG_INT              0x00    /* 4-byte integer (big-endian)  */
#define IR_ARG_ASCII            0x01    /* null-terminated ASCII string */
#define IR_ARG_UNKNOWN          0x80    /* unknown data type.  The low
                                         * 7 bits will contain the data
                                         * length.                      */
#define IR_ARG_UNKNOWN_LENGTH_MASK  0x7f


/* system controller event codes */
#define EV_CLASS_MASK         0xf000ul
#define EV_SEVERITY_MASK      0x0f00ul
#define EV_COMPONENT_MASK     0x00fful

#define EV_CLASS_POWER        0x1000ul
#define EV_CLASS_FAN          0x2000ul
#define EV_CLASS_TEMP         0x3000ul
#define EV_CLASS_ENV          0x4000ul
#define EV_CLASS_TEST_FAULT   0x5000ul
#define EV_CLASS_TEST_WARNING 0x6000ul
#define EV_CLASS_PWRD_NOTIFY  0x8000ul

/* ENV class codes */
#define ENV_PWRDN_PEND        0x4101ul

#define EV_SEVERITY_POWER_STABLE    0x0000ul
#define EV_SEVERITY_POWER_LOW_WARNING     0x0100ul
#define EV_SEVERITY_POWER_HIGH_WARNING    0x0200ul
#define EV_SEVERITY_POWER_HIGH_FAULT      0x0300ul
#define EV_SEVERITY_POWER_LOW_FAULT 0x0400ul

#define EV_SEVERITY_FAN_STABLE            0x0000ul
#define EV_SEVERITY_FAN_WARNING           0x0100ul
#define EV_SEVERITY_FAN_FAULT       0x0200ul

#define EV_SEVERITY_TEMP_STABLE           0x0000ul
#define EV_SEVERITY_TEMP_ADVISORY   0x0100ul
#define EV_SEVERITY_TEMP_CRITICAL   0x0200ul
#define EV_SEVERITY_TEMP_FAULT            0x0300ul

void scdrv_event_init(struct sysctl_data_s *);

#endif /* _SN_SYSCTL_H_ */

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