snsc.h

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/*
 * 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/fs.h>
#include <linux/cdev.h>
#include <linux/semaphore.h>
#include <asm/sn/types.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_ */