arch/ia64/sn/kernel/sn2/sn_proc_fs.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #ifdef CONFIG_PROC_FS
  10 #include <linux/proc_fs.h>
  11 #include <linux/seq_file.h>
  12 #include <asm/uaccess.h>
  13 #include <asm/sn/sn_sal.h>
  14
  15 static int partition_id_show(struct seq_file *s, void *p)
  16 {
  17         seq_printf(s, "%d\n", sn_partition_id);
  18         return 0;
  19 }
  20
  21 static int partition_id_open(struct inode *inode, struct file *file)
  22 {
  23         return single_open(file, partition_id_show, NULL);
  24 }
  25
  26 static int system_serial_number_show(struct seq_file *s, void *p)
  27 {
  28         seq_printf(s, "%s\n", sn_system_serial_number());
  29         return 0;
  30 }
  31
  32 static int system_serial_number_open(struct inode *inode, struct file *file)
  33 {
  34         return single_open(file, system_serial_number_show, NULL);
  35 }
  36
  37 static int licenseID_show(struct seq_file *s, void *p)
  38 {
  39         seq_printf(s, "0x%llx\n", sn_partition_serial_number_val());
  40         return 0;
  41 }
  42
  43 static int licenseID_open(struct inode *inode, struct file *file)
  44 {
  45         return single_open(file, licenseID_show, NULL);
  46 }
  47
  48 /*
  49  * Enable forced interrupt by default.
  50  * When set, the sn interrupt handler writes the force interrupt register on
  51  * the bridge chip.  The hardware will then send an interrupt message if the
  52  * interrupt line is active.  This mimics a level sensitive interrupt.
  53  */
  54 extern int sn_force_interrupt_flag;
  55
  56 static int sn_force_interrupt_show(struct seq_file *s, void *p)
  57 {
  58         seq_printf(s, "Force interrupt is %s\n",
  59                 sn_force_interrupt_flag ? "enabled" : "disabled");
  60         return 0;
  61 }
  62
  63 static ssize_t sn_force_interrupt_write_proc(struct file *file,
  64                 const char __user *buffer, size_t count, loff_t *data)
  65 {
  66         char val;
  67
  68         if (copy_from_user(&val, buffer, 1))
  69                 return -EFAULT;
  70
  71         sn_force_interrupt_flag = (val == '0') ? 0 : 1;
  72         return count;
  73 }
  74
  75 static int sn_force_interrupt_open(struct inode *inode, struct file *file)
  76 {
  77         return single_open(file, sn_force_interrupt_show, NULL);
  78 }
  79
  80 static int coherence_id_show(struct seq_file *s, void *p)
  81 {
  82         seq_printf(s, "%d\n", partition_coherence_id());
  83
  84         return 0;
  85 }
  86
  87 static int coherence_id_open(struct inode *inode, struct file *file)
  88 {
  89         return single_open(file, coherence_id_show, NULL);
  90 }
  91
  92 /* /proc/sgi_sn/sn_topology uses seq_file, see sn_hwperf.c */
  93 extern int sn_topology_open(struct inode *, struct file *);
  94 extern int sn_topology_release(struct inode *, struct file *);
  95
  96 static const struct file_operations proc_partition_id_fops = {
  97         .open           = partition_id_open,
  98         .read           = seq_read,
  99         .llseek         = seq_lseek,
 100         .release        = single_release,
 101 };
 102
 103 static const struct file_operations proc_system_sn_fops = {
 104         .open           = system_serial_number_open,
 105         .read           = seq_read,
 106         .llseek         = seq_lseek,
 107         .release        = single_release,
 108 };
 109
 110 static const struct file_operations proc_license_id_fops = {
 111         .open           = licenseID_open,
 112         .read           = seq_read,
 113         .llseek         = seq_lseek,
 114         .release        = single_release,
 115 };
 116
 117 static const struct file_operations proc_sn_force_intr_fops = {
 118         .open           = sn_force_interrupt_open,
 119         .read           = seq_read,
 120         .write          = sn_force_interrupt_write_proc,
 121         .llseek         = seq_lseek,
 122         .release        = single_release,
 123 };
 124
 125 static const struct file_operations proc_coherence_id_fops = {
 126         .open           = coherence_id_open,
 127         .read           = seq_read,
 128         .llseek         = seq_lseek,
 129         .release        = single_release,
 130 };
 131
 132 static const struct file_operations proc_sn_topo_fops = {
 133         .open           = sn_topology_open,
 134         .read           = seq_read,
 135         .llseek         = seq_lseek,
 136         .release        = sn_topology_release,
 137 };
 138
 139 void register_sn_procfs(void)
 140 {
 141         static struct proc_dir_entry *sgi_proc_dir = NULL;
 142
 143         BUG_ON(sgi_proc_dir != NULL);
 144         if (!(sgi_proc_dir = proc_mkdir("sgi_sn", NULL)))
 145                 return;
 146
 147         proc_create("partition_id", 0444, sgi_proc_dir,
 148                     &proc_partition_id_fops);
 149         proc_create("system_serial_number", 0444, sgi_proc_dir,
 150                     &proc_system_sn_fops);
 151         proc_create("licenseID", 0444, sgi_proc_dir, &proc_license_id_fops);
 152         proc_create("sn_force_interrupt", 0644, sgi_proc_dir,
 153                     &proc_sn_force_intr_fops);
 154         proc_create("coherence_id", 0444, sgi_proc_dir,
 155                     &proc_coherence_id_fops);
 156         proc_create("sn_topology", 0444, sgi_proc_dir, &proc_sn_topo_fops);
 157 }
 158
 159 #endif /* CONFIG_PROC_FS */