1/*
2 * Compaq Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 *
8 * All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18 * NON INFRINGEMENT.  See the GNU General Public License for more
19 * details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 * Send feedback to <greg@kroah.com>
26 *
27 */
28
29#include <linux/module.h>
30#include <linux/kernel.h>
31#include <linux/types.h>
32#include <linux/proc_fs.h>
33#include <linux/workqueue.h>
34#include <linux/pci.h>
35#include <linux/pci_hotplug.h>
36#include <linux/debugfs.h>
37#include "cpqphp.h"
38
39static int show_ctrl (struct controller *ctrl, char *buf)
40{
41	char *out = buf;
42	int index;
43	struct pci_resource *res;
44
45	out += sprintf(buf, "Free resources: memory\n");
46	index = 11;
47	res = ctrl->mem_head;
48	while (res && index--) {
49		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
50		res = res->next;
51	}
52	out += sprintf(out, "Free resources: prefetchable memory\n");
53	index = 11;
54	res = ctrl->p_mem_head;
55	while (res && index--) {
56		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
57		res = res->next;
58	}
59	out += sprintf(out, "Free resources: IO\n");
60	index = 11;
61	res = ctrl->io_head;
62	while (res && index--) {
63		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
64		res = res->next;
65	}
66	out += sprintf(out, "Free resources: bus numbers\n");
67	index = 11;
68	res = ctrl->bus_head;
69	while (res && index--) {
70		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
71		res = res->next;
72	}
73
74	return out - buf;
75}
76
77static int show_dev (struct controller *ctrl, char *buf)
78{
79	char * out = buf;
80	int index;
81	struct pci_resource *res;
82	struct pci_func *new_slot;
83	struct slot *slot;
84
85	slot = ctrl->slot;
86
87	while (slot) {
88		new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
89		if (!new_slot)
90			break;
91		out += sprintf(out, "assigned resources: memory\n");
92		index = 11;
93		res = new_slot->mem_head;
94		while (res && index--) {
95			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
96			res = res->next;
97		}
98		out += sprintf(out, "assigned resources: prefetchable memory\n");
99		index = 11;
100		res = new_slot->p_mem_head;
101		while (res && index--) {
102			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
103			res = res->next;
104		}
105		out += sprintf(out, "assigned resources: IO\n");
106		index = 11;
107		res = new_slot->io_head;
108		while (res && index--) {
109			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
110			res = res->next;
111		}
112		out += sprintf(out, "assigned resources: bus numbers\n");
113		index = 11;
114		res = new_slot->bus_head;
115		while (res && index--) {
116			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
117			res = res->next;
118		}
119		slot=slot->next;
120	}
121
122	return out - buf;
123}
124
125static int spew_debug_info(struct controller *ctrl, char *data, int size)
126{
127	int used;
128
129	used = size - show_ctrl(ctrl, data);
130	used = (size - used) - show_dev(ctrl, &data[used]);
131	return used;
132}
133
134struct ctrl_dbg {
135	int size;
136	char *data;
137	struct controller *ctrl;
138};
139
140#define MAX_OUTPUT	(4*PAGE_SIZE)
141
142static int open(struct inode *inode, struct file *file)
143{
144	struct controller *ctrl = inode->i_private;
145	struct ctrl_dbg *dbg;
146	int retval = -ENOMEM;
147
148	lock_kernel();
149	dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
150	if (!dbg)
151		goto exit;
152	dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
153	if (!dbg->data) {
154		kfree(dbg);
155		goto exit;
156	}
157	dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
158	file->private_data = dbg;
159	retval = 0;
160exit:
161	unlock_kernel();
162	return retval;
163}
164
165static loff_t lseek(struct file *file, loff_t off, int whence)
166{
167	struct ctrl_dbg *dbg;
168	loff_t new = -1;
169
170	lock_kernel();
171	dbg = file->private_data;
172
173	switch (whence) {
174	case 0:
175		new = off;
176		break;
177	case 1:
178		new = file->f_pos + off;
179		break;
180	}
181	if (new < 0 || new > dbg->size) {
182		unlock_kernel();
183		return -EINVAL;
184	}
185	unlock_kernel();
186	return (file->f_pos = new);
187}
188
189static ssize_t read(struct file *file, char __user *buf,
190		    size_t nbytes, loff_t *ppos)
191{
192	struct ctrl_dbg *dbg = file->private_data;
193	return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
194}
195
196static int release(struct inode *inode, struct file *file)
197{
198	struct ctrl_dbg *dbg = file->private_data;
199
200	kfree(dbg->data);
201	kfree(dbg);
202	return 0;
203}
204
205static const struct file_operations debug_ops = {
206	.owner = THIS_MODULE,
207	.open = open,
208	.llseek = lseek,
209	.read = read,
210	.release = release,
211};
212
213static struct dentry *root;
214
215void cpqhp_initialize_debugfs(void)
216{
217	if (!root)
218		root = debugfs_create_dir("cpqhp", NULL);
219}
220
221void cpqhp_shutdown_debugfs(void)
222{
223	debugfs_remove(root);
224}
225
226void cpqhp_create_debugfs_files(struct controller *ctrl)
227{
228	ctrl->dentry = debugfs_create_file(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops);
229}
230
231void cpqhp_remove_debugfs_files(struct controller *ctrl)
232{
233	if (ctrl->dentry)
234		debugfs_remove(ctrl->dentry);
235	ctrl->dentry = NULL;
236}
237