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/debugfs.h>
38 static int show_ctrl (struct controller *ctrl, char *buf)
42 struct pci_resource *res;
44 out += sprintf(buf, "Free resources: memory\n");
47 while (res && index--) {
48 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
51 out += sprintf(out, "Free resources: prefetchable memory\n");
53 res = ctrl->p_mem_head;
54 while (res && index--) {
55 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
58 out += sprintf(out, "Free resources: IO\n");
61 while (res && index--) {
62 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
65 out += sprintf(out, "Free resources: bus numbers\n");
68 while (res && index--) {
69 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
76 static int show_dev (struct controller *ctrl, char *buf)
80 struct pci_resource *res;
81 struct pci_func *new_slot;
87 new_slot = cpqhp_slot_find(slot->bus, slot->device, 0);
90 out += sprintf(out, "assigned resources: memory\n");
92 res = new_slot->mem_head;
93 while (res && index--) {
94 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
97 out += sprintf(out, "assigned resources: prefetchable memory\n");
99 res = new_slot->p_mem_head;
100 while (res && index--) {
101 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
104 out += sprintf(out, "assigned resources: IO\n");
106 res = new_slot->io_head;
107 while (res && index--) {
108 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
111 out += sprintf(out, "assigned resources: bus numbers\n");
113 res = new_slot->bus_head;
114 while (res && index--) {
115 out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
124 static int spew_debug_info(struct controller *ctrl, char *data, int size)
128 used = size - show_ctrl(ctrl, data);
129 used = (size - used) - show_dev(ctrl, &data[used]);
136 struct controller *ctrl;
139 #define MAX_OUTPUT (4*PAGE_SIZE)
141 static int open(struct inode *inode, struct file *file)
143 struct controller *ctrl = inode->i_private;
144 struct ctrl_dbg *dbg;
145 int retval = -ENOMEM;
148 dbg = kmalloc(sizeof(*dbg), GFP_KERNEL);
151 dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
156 dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT);
157 file->private_data = dbg;
164 static loff_t lseek(struct file *file, loff_t off, int whence)
166 struct ctrl_dbg *dbg;
170 dbg = file->private_data;
177 new = file->f_pos + off;
180 if (new < 0 || new > dbg->size) {
185 return (file->f_pos = new);
188 static ssize_t read(struct file *file, char __user *buf,
189 size_t nbytes, loff_t *ppos)
191 struct ctrl_dbg *dbg = file->private_data;
192 return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size);
195 static int release(struct inode *inode, struct file *file)
197 struct ctrl_dbg *dbg = file->private_data;
204 static struct file_operations debug_ops = {
205 .owner = THIS_MODULE,
212 static struct dentry *root;
214 void cpqhp_initialize_debugfs(void)
217 root = debugfs_create_dir("cpqhp", NULL);
220 void cpqhp_shutdown_debugfs(void)
222 debugfs_remove(root);
225 void cpqhp_create_debugfs_files(struct controller *ctrl)
227 ctrl->dentry = debugfs_create_file(ctrl->pci_dev->dev.bus_id, S_IRUGO, root, ctrl, &debug_ops);
230 void cpqhp_remove_debugfs_files(struct controller *ctrl)
233 debugfs_remove(ctrl->dentry);