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) 2000-2004 Silicon Graphics, Inc. All rights reserved.
   7  */
   8 #include <linux/config.h>
   9 #include <asm/uaccess.h>
  10
  11 #ifdef CONFIG_PROC_FS
  12 #include <linux/proc_fs.h>
  13 #include <linux/seq_file.h>
  14 #include <asm/sn/sn_sal.h>
  15
  16 static int partition_id_show(struct seq_file *s, void *p)
  17 {
  18         seq_printf(s, "%d\n", sn_local_partid());
  19         return 0;
  20 }
  21
  22 static int partition_id_open(struct inode *inode, struct file *file)
  23 {
  24         return single_open(file, partition_id_show, NULL);
  25 }
  26
  27 static int system_serial_number_show(struct seq_file *s, void *p)
  28 {
  29         seq_printf(s, "%s\n", sn_system_serial_number());
  30         return 0;
  31 }
  32
  33 static int system_serial_number_open(struct inode *inode, struct file *file)
  34 {
  35         return single_open(file, system_serial_number_show, NULL);
  36 }
  37
  38 static int licenseID_show(struct seq_file *s, void *p)
  39 {
  40         seq_printf(s, "0x%lx\n", sn_partition_serial_number_val());
  41         return 0;
  42 }
  43
  44 static int licenseID_open(struct inode *inode, struct file *file)
  45 {
  46         return single_open(file, licenseID_show, NULL);
  47 }
  48
  49 /*
  50  * Enable forced interrupt by default.
  51  * When set, the sn interrupt handler writes the force interrupt register on
  52  * the bridge chip.  The hardware will then send an interrupt message if the
  53  * interrupt line is active.  This mimics a level sensitive interrupt.
  54  */
  55 int sn_force_interrupt_flag = 1;
  56
  57 static int sn_force_interrupt_show(struct seq_file *s, void *p)
  58 {
  59         seq_printf(s, "Force interrupt is %s\n",
  60                 sn_force_interrupt_flag ? "enabled" : "disabled");
  61         return 0;
  62 }
  63
  64 static ssize_t sn_force_interrupt_write_proc(struct file *file,
  65                 const char __user *buffer, size_t count, loff_t *data)
  66 {
  67         char val;
  68
  69         if (copy_from_user(&val, buffer, 1))
  70                 return -EFAULT;
  71
  72         sn_force_interrupt_flag = (val == '0') ? 0 : 1;
  73         return count;
  74 }
  75
  76 static int sn_force_interrupt_open(struct inode *inode, struct file *file)
  77 {
  78         return single_open(file, sn_force_interrupt_show, NULL);
  79 }
  80
  81 static int coherence_id_show(struct seq_file *s, void *p)
  82 {
  83         seq_printf(s, "%d\n", partition_coherence_id());
  84
  85         return 0;
  86 }
  87
  88 static int coherence_id_open(struct inode *inode, struct file *file)
  89 {
  90         return single_open(file, coherence_id_show, NULL);
  91 }
  92
  93 static struct proc_dir_entry *sn_procfs_create_entry(
  94         const char *name, struct proc_dir_entry *parent,
  95         int (*openfunc)(struct inode *, struct file *),
  96         int (*releasefunc)(struct inode *, struct file *))
  97 {
  98         struct proc_dir_entry *e = create_proc_entry(name, 0444, parent);
  99
 100         if (e) {
 101                 e->proc_fops = (struct file_operations *)kmalloc(
 102                         sizeof(struct file_operations), GFP_KERNEL);
 103                 if (e->proc_fops) {
 104                         memset(e->proc_fops, 0, sizeof(struct file_operations));
 105                         e->proc_fops->open = openfunc;
 106                         e->proc_fops->read = seq_read;
 107                         e->proc_fops->llseek = seq_lseek;
 108                         e->proc_fops->release = releasefunc;
 109                 }
 110         }
 111
 112         return e;
 113 }
 114
 115 /* /proc/sgi_sn/sn_topology uses seq_file, see sn_hwperf.c */
 116 extern int sn_topology_open(struct inode *, struct file *);
 117 extern int sn_topology_release(struct inode *, struct file *);
 118
 119 void register_sn_procfs(void)
 120 {
 121         static struct proc_dir_entry *sgi_proc_dir = NULL;
 122         struct proc_dir_entry *e;
 123
 124         BUG_ON(sgi_proc_dir != NULL);
 125         if (!(sgi_proc_dir = proc_mkdir("sgi_sn", NULL)))
 126                 return;
 127
 128         sn_procfs_create_entry("partition_id", sgi_proc_dir,
 129                 partition_id_open, single_release);
 130
 131         sn_procfs_create_entry("system_serial_number", sgi_proc_dir,
 132                 system_serial_number_open, single_release);
 133
 134         sn_procfs_create_entry("licenseID", sgi_proc_dir,
 135                 licenseID_open, single_release);
 136
 137         e = sn_procfs_create_entry("sn_force_interrupt", sgi_proc_dir,
 138                 sn_force_interrupt_open, single_release);
 139         if (e)
 140                 e->proc_fops->write = sn_force_interrupt_write_proc;
 141
 142         sn_procfs_create_entry("coherence_id", sgi_proc_dir,
 143                 coherence_id_open, single_release);
 144
 145         sn_procfs_create_entry("sn_topology", sgi_proc_dir,
 146                 sn_topology_open, sn_topology_release);
 147 }
 148
 149 #endif /* CONFIG_PROC_FS */