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1da177e4 LT |
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 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/kernel.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
1da177e4 LT |
32 | #include <linux/types.h> |
33 | #include <linux/proc_fs.h> | |
34 | #include <linux/workqueue.h> | |
35 | #include <linux/pci.h> | |
7a54f25c | 36 | #include <linux/pci_hotplug.h> |
405f5571 | 37 | #include <linux/smp_lock.h> |
9f3f4681 | 38 | #include <linux/debugfs.h> |
1da177e4 LT |
39 | #include "cpqphp.h" |
40 | ||
9f3f4681 | 41 | static int show_ctrl (struct controller *ctrl, char *buf) |
1da177e4 | 42 | { |
9f3f4681 | 43 | char *out = buf; |
1da177e4 LT |
44 | int index; |
45 | struct pci_resource *res; | |
46 | ||
1da177e4 LT |
47 | out += sprintf(buf, "Free resources: memory\n"); |
48 | index = 11; | |
49 | res = ctrl->mem_head; | |
50 | while (res && index--) { | |
51 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
52 | res = res->next; | |
53 | } | |
54 | out += sprintf(out, "Free resources: prefetchable memory\n"); | |
55 | index = 11; | |
56 | res = ctrl->p_mem_head; | |
57 | while (res && index--) { | |
58 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
59 | res = res->next; | |
60 | } | |
61 | out += sprintf(out, "Free resources: IO\n"); | |
62 | index = 11; | |
63 | res = ctrl->io_head; | |
64 | while (res && index--) { | |
65 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
66 | res = res->next; | |
67 | } | |
68 | out += sprintf(out, "Free resources: bus numbers\n"); | |
69 | index = 11; | |
70 | res = ctrl->bus_head; | |
71 | while (res && index--) { | |
72 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
73 | res = res->next; | |
74 | } | |
75 | ||
76 | return out - buf; | |
77 | } | |
1da177e4 | 78 | |
9f3f4681 | 79 | static int show_dev (struct controller *ctrl, char *buf) |
1da177e4 | 80 | { |
1da177e4 LT |
81 | char * out = buf; |
82 | int index; | |
83 | struct pci_resource *res; | |
84 | struct pci_func *new_slot; | |
85 | struct slot *slot; | |
86 | ||
9f3f4681 | 87 | slot = ctrl->slot; |
1da177e4 LT |
88 | |
89 | while (slot) { | |
90 | new_slot = cpqhp_slot_find(slot->bus, slot->device, 0); | |
91 | if (!new_slot) | |
92 | break; | |
93 | out += sprintf(out, "assigned resources: memory\n"); | |
94 | index = 11; | |
95 | res = new_slot->mem_head; | |
96 | while (res && index--) { | |
97 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
98 | res = res->next; | |
99 | } | |
100 | out += sprintf(out, "assigned resources: prefetchable memory\n"); | |
101 | index = 11; | |
102 | res = new_slot->p_mem_head; | |
103 | while (res && index--) { | |
104 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
105 | res = res->next; | |
106 | } | |
107 | out += sprintf(out, "assigned resources: IO\n"); | |
108 | index = 11; | |
109 | res = new_slot->io_head; | |
110 | while (res && index--) { | |
111 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
112 | res = res->next; | |
113 | } | |
114 | out += sprintf(out, "assigned resources: bus numbers\n"); | |
115 | index = 11; | |
116 | res = new_slot->bus_head; | |
117 | while (res && index--) { | |
118 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
119 | res = res->next; | |
120 | } | |
121 | slot=slot->next; | |
122 | } | |
123 | ||
124 | return out - buf; | |
125 | } | |
1da177e4 | 126 | |
9f3f4681 | 127 | static int spew_debug_info(struct controller *ctrl, char *data, int size) |
1da177e4 | 128 | { |
9f3f4681 GKH |
129 | int used; |
130 | ||
131 | used = size - show_ctrl(ctrl, data); | |
132 | used = (size - used) - show_dev(ctrl, &data[used]); | |
133 | return used; | |
134 | } | |
135 | ||
136 | struct ctrl_dbg { | |
137 | int size; | |
138 | char *data; | |
139 | struct controller *ctrl; | |
140 | }; | |
141 | ||
142 | #define MAX_OUTPUT (4*PAGE_SIZE) | |
143 | ||
144 | static int open(struct inode *inode, struct file *file) | |
145 | { | |
8e18e294 | 146 | struct controller *ctrl = inode->i_private; |
9f3f4681 GKH |
147 | struct ctrl_dbg *dbg; |
148 | int retval = -ENOMEM; | |
149 | ||
150 | lock_kernel(); | |
151 | dbg = kmalloc(sizeof(*dbg), GFP_KERNEL); | |
152 | if (!dbg) | |
153 | goto exit; | |
154 | dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); | |
155 | if (!dbg->data) { | |
156 | kfree(dbg); | |
157 | goto exit; | |
158 | } | |
159 | dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT); | |
160 | file->private_data = dbg; | |
161 | retval = 0; | |
162 | exit: | |
163 | unlock_kernel(); | |
164 | return retval; | |
165 | } | |
166 | ||
167 | static loff_t lseek(struct file *file, loff_t off, int whence) | |
168 | { | |
169 | struct ctrl_dbg *dbg; | |
170 | loff_t new = -1; | |
171 | ||
172 | lock_kernel(); | |
173 | dbg = file->private_data; | |
174 | ||
175 | switch (whence) { | |
176 | case 0: | |
177 | new = off; | |
178 | break; | |
179 | case 1: | |
180 | new = file->f_pos + off; | |
181 | break; | |
182 | } | |
183 | if (new < 0 || new > dbg->size) { | |
184 | unlock_kernel(); | |
185 | return -EINVAL; | |
186 | } | |
187 | unlock_kernel(); | |
188 | return (file->f_pos = new); | |
1da177e4 | 189 | } |
9f3f4681 GKH |
190 | |
191 | static ssize_t read(struct file *file, char __user *buf, | |
192 | size_t nbytes, loff_t *ppos) | |
193 | { | |
194 | struct ctrl_dbg *dbg = file->private_data; | |
195 | return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size); | |
196 | } | |
197 | ||
198 | static int release(struct inode *inode, struct file *file) | |
199 | { | |
200 | struct ctrl_dbg *dbg = file->private_data; | |
201 | ||
202 | kfree(dbg->data); | |
203 | kfree(dbg); | |
204 | return 0; | |
205 | } | |
206 | ||
d54b1fdb | 207 | static const struct file_operations debug_ops = { |
9f3f4681 GKH |
208 | .owner = THIS_MODULE, |
209 | .open = open, | |
210 | .llseek = lseek, | |
211 | .read = read, | |
212 | .release = release, | |
213 | }; | |
214 | ||
215 | static struct dentry *root; | |
216 | ||
217 | void cpqhp_initialize_debugfs(void) | |
218 | { | |
219 | if (!root) | |
220 | root = debugfs_create_dir("cpqhp", NULL); | |
221 | } | |
222 | ||
223 | void cpqhp_shutdown_debugfs(void) | |
224 | { | |
225 | debugfs_remove(root); | |
226 | } | |
227 | ||
228 | void cpqhp_create_debugfs_files(struct controller *ctrl) | |
229 | { | |
54cc6954 KS |
230 | ctrl->dentry = debugfs_create_file(dev_name(&ctrl->pci_dev->dev), |
231 | S_IRUGO, root, ctrl, &debug_ops); | |
9f3f4681 GKH |
232 | } |
233 | ||
234 | void cpqhp_remove_debugfs_files(struct controller *ctrl) | |
235 | { | |
236 | if (ctrl->dentry) | |
237 | debugfs_remove(ctrl->dentry); | |
238 | ctrl->dentry = NULL; | |
239 | } | |
240 |