2 * Compaq Hot Plug Controller Driver
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.
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.
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
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.
25 * Send feedback to <greg@kroah.com>
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/smp_lock.h>
37 #include <linux/debugfs.h>
40 static int show_ctrl (struct controller *ctrl, char *buf)
44 struct pci_resource *res;
46 out += sprintf(buf, "Free resources: memory\n");
49 while (res && index--) {
50 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
53 out += sprintf(out, "Free resources: prefetchable memory\n");
55 res = ctrl->p_mem_head;
56 while (res && index--) {
57 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
60 out += sprintf(out, "Free resources: IO\n");
63 while (res && index--) {
64 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
67 out += sprintf(out, "Free resources: bus numbers\n");
70 while (res && index--) {
71 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
78 static int show_dev (struct controller *ctrl, char *buf)
82 struct pci_resource *res;
83 struct pci_func *new_slot;
89 new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
92 out += sprintf(out, "assigned resources: memory\n");
94 res = new_slot->mem_head;
95 while (res && index--) {
96 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
99 out += sprintf(out, "assigned resources: prefetchable memory\n");
101 res = new_slot->p_mem_head;
102 while (res && index--) {
103 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
106 out += sprintf(out, "assigned resources: IO\n");
108 res = new_slot->io_head;
109 while (res && index--) {
110 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
113 out += sprintf(out, "assigned resources: bus numbers\n");
115 res = new_slot->bus_head;
116 while (res && index--) {
117 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
126 static int spew_debug_info(struct controller *ctrl, char *data, int size)
130 used = size - show_ctrl(ctrl, data);
131 used = (size - used) - show_dev(ctrl, &data[used]);
138 struct controller *ctrl;
141 #define MAX_OUTPUT (4*PAGE_SIZE)
143 static int open(struct inode *inode, struct file *file)
145 struct controller *ctrl = inode->i_private;
146 struct ctrl_dbg *dbg;
147 int retval = -ENOMEM;
150 dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
153 dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
158 dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
159 file->private_data = dbg;
166 static loff_t lseek(struct file *file, loff_t off, int whence)
168 struct ctrl_dbg *dbg;
172 dbg = file->private_data;
179 new = file->f_pos + off;
182 if (new < 0 || new > dbg->size) {
187 return (file->f_pos = new);
190 static ssize_t read(struct file *file, char __user *buf,
191 size_t nbytes, loff_t *ppos)
193 struct ctrl_dbg *dbg = file->private_data;
194 return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
197 static int release(struct inode *inode, struct file *file)
199 struct ctrl_dbg *dbg = file->private_data;
206 static const struct file_operations debug_ops = {
207 .owner = THIS_MODULE,
214 static struct dentry *root;
216 void cpqhp_initialize_debugfs(void)
219 root = debugfs_create_dir("cpqhp", NULL);
222 void cpqhp_shutdown_debugfs(void)
224 debugfs_remove(root);
227 void cpqhp_create_debugfs_files(struct controller *ctrl)
229 ctrl->dentry = debugfs_create_file(dev_name(&ctrl->pci_dev->dev),
230 S_IRUGO, root, ctrl, &debug_ops);
233 void cpqhp_remove_debugfs_files(struct controller *ctrl)
236 debugfs_remove(ctrl->dentry);