Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/types.h> |
| 33 | #include <linux/proc_fs.h> |
| 34 | #include <linux/workqueue.h> |
| 35 | #include <linux/pci.h> |
Greg Kroah-Hartman | 7a54f25 | 2006-10-13 20:05:19 -0700 | [diff] [blame] | 36 | #include <linux/pci_hotplug.h> |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 37 | #include <linux/mutex.h> |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 38 | #include <linux/debugfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "cpqphp.h" |
| 40 | |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 41 | static DEFINE_MUTEX(cpqphp_mutex); |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 42 | static int show_ctrl(struct controller *ctrl, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | { |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 44 | char *out = buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | int index; |
| 46 | struct pci_resource *res; |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | out += sprintf(buf, "Free resources: memory\n"); |
| 49 | index = 11; |
| 50 | res = ctrl->mem_head; |
| 51 | while (res && index--) { |
| 52 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 53 | res = res->next; |
| 54 | } |
| 55 | out += sprintf(out, "Free resources: prefetchable memory\n"); |
| 56 | index = 11; |
| 57 | res = ctrl->p_mem_head; |
| 58 | while (res && index--) { |
| 59 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 60 | res = res->next; |
| 61 | } |
| 62 | out += sprintf(out, "Free resources: IO\n"); |
| 63 | index = 11; |
| 64 | res = ctrl->io_head; |
| 65 | while (res && index--) { |
| 66 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 67 | res = res->next; |
| 68 | } |
| 69 | out += sprintf(out, "Free resources: bus numbers\n"); |
| 70 | index = 11; |
| 71 | res = ctrl->bus_head; |
| 72 | while (res && index--) { |
| 73 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 74 | res = res->next; |
| 75 | } |
| 76 | |
| 77 | return out - buf; |
| 78 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 80 | static int show_dev(struct controller *ctrl, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 82 | char *out = buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | int index; |
| 84 | struct pci_resource *res; |
| 85 | struct pci_func *new_slot; |
| 86 | struct slot *slot; |
| 87 | |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 88 | slot = ctrl->slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | while (slot) { |
| 91 | new_slot = cpqhp_slot_find(slot->bus, slot->device, 0); |
| 92 | if (!new_slot) |
| 93 | break; |
| 94 | out += sprintf(out, "assigned resources: memory\n"); |
| 95 | index = 11; |
| 96 | res = new_slot->mem_head; |
| 97 | while (res && index--) { |
| 98 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 99 | res = res->next; |
| 100 | } |
| 101 | out += sprintf(out, "assigned resources: prefetchable memory\n"); |
| 102 | index = 11; |
| 103 | res = new_slot->p_mem_head; |
| 104 | while (res && index--) { |
| 105 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 106 | res = res->next; |
| 107 | } |
| 108 | out += sprintf(out, "assigned resources: IO\n"); |
| 109 | index = 11; |
| 110 | res = new_slot->io_head; |
| 111 | while (res && index--) { |
| 112 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 113 | res = res->next; |
| 114 | } |
| 115 | out += sprintf(out, "assigned resources: bus numbers\n"); |
| 116 | index = 11; |
| 117 | res = new_slot->bus_head; |
| 118 | while (res && index--) { |
| 119 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); |
| 120 | res = res->next; |
| 121 | } |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 122 | slot = slot->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | return out - buf; |
| 126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 128 | static int spew_debug_info(struct controller *ctrl, char *data, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | { |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 130 | int used; |
| 131 | |
| 132 | used = size - show_ctrl(ctrl, data); |
| 133 | used = (size - used) - show_dev(ctrl, &data[used]); |
| 134 | return used; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 136 | |
| 137 | struct ctrl_dbg { |
| 138 | int size; |
| 139 | char *data; |
| 140 | struct controller *ctrl; |
| 141 | }; |
| 142 | |
| 143 | #define MAX_OUTPUT (4*PAGE_SIZE) |
| 144 | |
| 145 | static int open(struct inode *inode, struct file *file) |
| 146 | { |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 147 | struct controller *ctrl = inode->i_private; |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 148 | struct ctrl_dbg *dbg; |
| 149 | int retval = -ENOMEM; |
| 150 | |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 151 | mutex_lock(&cpqphp_mutex); |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 152 | dbg = kmalloc(sizeof(*dbg), GFP_KERNEL); |
| 153 | if (!dbg) |
| 154 | goto exit; |
| 155 | dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); |
| 156 | if (!dbg->data) { |
| 157 | kfree(dbg); |
| 158 | goto exit; |
| 159 | } |
| 160 | dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT); |
| 161 | file->private_data = dbg; |
| 162 | retval = 0; |
| 163 | exit: |
Arnd Bergmann | 613655f | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 164 | mutex_unlock(&cpqphp_mutex); |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 165 | return retval; |
| 166 | } |
| 167 | |
| 168 | static loff_t lseek(struct file *file, loff_t off, int whence) |
| 169 | { |
Al Viro | d2c40f7 | 2013-06-23 12:46:49 +0400 | [diff] [blame] | 170 | struct ctrl_dbg *dbg = file->private_data; |
| 171 | return fixed_size_llseek(file, off, whence, dbg->size); |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | static ssize_t read(struct file *file, char __user *buf, |
| 175 | size_t nbytes, loff_t *ppos) |
| 176 | { |
| 177 | struct ctrl_dbg *dbg = file->private_data; |
| 178 | return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size); |
| 179 | } |
| 180 | |
| 181 | static int release(struct inode *inode, struct file *file) |
| 182 | { |
| 183 | struct ctrl_dbg *dbg = file->private_data; |
| 184 | |
| 185 | kfree(dbg->data); |
| 186 | kfree(dbg); |
| 187 | return 0; |
| 188 | } |
| 189 | |
Arjan van de Ven | d54b1fd | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 190 | static const struct file_operations debug_ops = { |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 191 | .owner = THIS_MODULE, |
| 192 | .open = open, |
| 193 | .llseek = lseek, |
| 194 | .read = read, |
| 195 | .release = release, |
| 196 | }; |
| 197 | |
| 198 | static struct dentry *root; |
| 199 | |
| 200 | void cpqhp_initialize_debugfs(void) |
| 201 | { |
| 202 | if (!root) |
| 203 | root = debugfs_create_dir("cpqhp", NULL); |
| 204 | } |
| 205 | |
| 206 | void cpqhp_shutdown_debugfs(void) |
| 207 | { |
| 208 | debugfs_remove(root); |
| 209 | } |
| 210 | |
| 211 | void cpqhp_create_debugfs_files(struct controller *ctrl) |
| 212 | { |
Kay Sievers | 54cc695 | 2009-03-24 16:38:21 -0700 | [diff] [blame] | 213 | ctrl->dentry = debugfs_create_file(dev_name(&ctrl->pci_dev->dev), |
| 214 | S_IRUGO, root, ctrl, &debug_ops); |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | void cpqhp_remove_debugfs_files(struct controller *ctrl) |
| 218 | { |
Fabian Frederick | 5d37818 | 2014-06-28 11:44:43 +0200 | [diff] [blame] | 219 | debugfs_remove(ctrl->dentry); |
Greg Kroah-Hartman | 9f3f468 | 2005-12-14 09:37:26 -0800 | [diff] [blame] | 220 | ctrl->dentry = NULL; |
| 221 | } |
| 222 | |