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
15static 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
21static int partition_id_open(struct inode *inode, struct file *file)
22{
23	return single_open(file, partition_id_show, NULL);
24}
25
26static 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
32static int system_serial_number_open(struct inode *inode, struct file *file)
33{
34	return single_open(file, system_serial_number_show, NULL);
35}
36
37static int licenseID_show(struct seq_file *s, void *p)
38{
39	seq_printf(s, "0x%lx\n", sn_partition_serial_number_val());
40	return 0;
41}
42
43static 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 */
54extern int sn_force_interrupt_flag;
55
56static 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
63static 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
75static int sn_force_interrupt_open(struct inode *inode, struct file *file)
76{
77	return single_open(file, sn_force_interrupt_show, NULL);
78}
79
80static 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
87static 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 */
93extern int sn_topology_open(struct inode *, struct file *);
94extern int sn_topology_release(struct inode *, struct file *);
95
96static 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
103static 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
110static 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
117static 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
125static 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
132static 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
139void register_sn_procfs(void)
140{
141	static struct proc_dir_entry *sgi_proc_dir = NULL;
142	struct proc_dir_entry *pde;
143
144	BUG_ON(sgi_proc_dir != NULL);
145	if (!(sgi_proc_dir = proc_mkdir("sgi_sn", NULL)))
146		return;
147
148	pde = create_proc_entry("partition_id", 0444, sgi_proc_dir);
149	if (pde)
150		pde->proc_fops = &proc_partition_id_fops;
151	pde = create_proc_entry("system_serial_number", 0444, sgi_proc_dir);
152	if (pde)
153		pde->proc_fops = &proc_system_sn_fops;
154	pde = create_proc_entry("licenseID", 0444, sgi_proc_dir);
155	if (pde)
156		pde->proc_fops = &proc_license_id_fops;
157	pde = create_proc_entry("sn_force_interrupt", 0644, sgi_proc_dir);
158	if (pde)
159		pde->proc_fops = &proc_sn_force_intr_fops;
160	pde = create_proc_entry("coherence_id", 0444, sgi_proc_dir);
161	if (pde)
162		pde->proc_fops = &proc_coherence_id_fops;
163	pde = create_proc_entry("sn_topology", 0444, sgi_proc_dir);
164	if (pde)
165		pde->proc_fops = &proc_sn_topo_fops;
166}
167
168#endif /* CONFIG_PROC_FS */
169