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sn_proc_fs.c

/*
 * 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) 2000-2005 Silicon Graphics, Inc. All rights reserved.
 */

#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
#include <asm/sn/sn_sal.h>

static int partition_id_show(struct seq_file *s, void *p)
{
      seq_printf(s, "%d\n", sn_partition_id);
      return 0;
}

static int partition_id_open(struct inode *inode, struct file *file)
{
      return single_open(file, partition_id_show, NULL);
}

static int system_serial_number_show(struct seq_file *s, void *p)
{
      seq_printf(s, "%s\n", sn_system_serial_number());
      return 0;
}

static int system_serial_number_open(struct inode *inode, struct file *file)
{
      return single_open(file, system_serial_number_show, NULL);
}

static int licenseID_show(struct seq_file *s, void *p)
{
      seq_printf(s, "0x%lx\n", sn_partition_serial_number_val());
      return 0;
}

static int licenseID_open(struct inode *inode, struct file *file)
{
      return single_open(file, licenseID_show, NULL);
}

/*
 * Enable forced interrupt by default.
 * When set, the sn interrupt handler writes the force interrupt register on
 * the bridge chip.  The hardware will then send an interrupt message if the
 * interrupt line is active.  This mimics a level sensitive interrupt.
 */
extern int sn_force_interrupt_flag;

static int sn_force_interrupt_show(struct seq_file *s, void *p)
{
      seq_printf(s, "Force interrupt is %s\n",
            sn_force_interrupt_flag ? "enabled" : "disabled");
      return 0;
}

static ssize_t sn_force_interrupt_write_proc(struct file *file,
            const char __user *buffer, size_t count, loff_t *data)
{
      char val;

      if (copy_from_user(&val, buffer, 1))
            return -EFAULT;

      sn_force_interrupt_flag = (val == '0') ? 0 : 1;
      return count;
}

static int sn_force_interrupt_open(struct inode *inode, struct file *file)
{
      return single_open(file, sn_force_interrupt_show, NULL);
}

static int coherence_id_show(struct seq_file *s, void *p)
{
      seq_printf(s, "%d\n", partition_coherence_id());

      return 0;
}

static int coherence_id_open(struct inode *inode, struct file *file)
{
      return single_open(file, coherence_id_show, NULL);
}

/* /proc/sgi_sn/sn_topology uses seq_file, see sn_hwperf.c */
extern int sn_topology_open(struct inode *, struct file *);
extern int sn_topology_release(struct inode *, struct file *);

static const struct file_operations proc_partition_id_fops = {
      .open       = partition_id_open,
      .read       = seq_read,
      .llseek           = seq_lseek,
      .release    = single_release,
};

static const struct file_operations proc_system_sn_fops = {
      .open       = system_serial_number_open,
      .read       = seq_read,
      .llseek           = seq_lseek,
      .release    = single_release,
};

static const struct file_operations proc_license_id_fops = {
      .open       = licenseID_open,
      .read       = seq_read,
      .llseek           = seq_lseek,
      .release    = single_release,
};

static const struct file_operations proc_sn_force_intr_fops = {
      .open       = sn_force_interrupt_open,
      .read       = seq_read,
      .write            = sn_force_interrupt_write_proc,
      .llseek           = seq_lseek,
      .release    = single_release,
};

static const struct file_operations proc_coherence_id_fops = {
      .open       = coherence_id_open,
      .read       = seq_read,
      .llseek           = seq_lseek,
      .release    = single_release,
};

static const struct file_operations proc_sn_topo_fops = {
      .open       = sn_topology_open,
      .read       = seq_read,
      .llseek           = seq_lseek,
      .release    = sn_topology_release,
};

void register_sn_procfs(void)
{
      static struct proc_dir_entry *sgi_proc_dir = NULL;

      BUG_ON(sgi_proc_dir != NULL);
      if (!(sgi_proc_dir = proc_mkdir("sgi_sn", NULL)))
            return;

      proc_create("partition_id", 0444, sgi_proc_dir,
                &proc_partition_id_fops);
      proc_create("system_serial_number", 0444, sgi_proc_dir,
                &proc_system_sn_fops);
      proc_create("licenseID", 0444, sgi_proc_dir, &proc_license_id_fops);
      proc_create("sn_force_interrupt", 0644, sgi_proc_dir,
                &proc_sn_force_intr_fops);
      proc_create("coherence_id", 0444, sgi_proc_dir,
                &proc_coherence_id_fops);
      proc_create("sn_topology", 0444, sgi_proc_dir, &proc_sn_topo_fops);
}

#endif /* CONFIG_PROC_FS */

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