Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * PCI HotPlug Controller Core |
| 3 | * |
| 4 | * Copyright (C) 2001-2002 Greg Kroah-Hartman (greg@kroah.com) |
| 5 | * Copyright (C) 2001-2002 IBM Corp. |
| 6 | * |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or (at |
| 12 | * your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 17 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 18 | * details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | * |
Kristen Carlson Accardi | fb5f4d7 | 2006-09-29 10:30:27 -0700 | [diff] [blame] | 24 | * Send feedback to <kristen.c.accardi@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | * |
| 26 | */ |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/moduleparam.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/list.h> |
Greg Kroah-Hartman | 7a54f25 | 2006-10-13 20:05:19 -0700 | [diff] [blame] | 33 | #include <linux/kobject.h> |
| 34 | #include <linux/sysfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/pagemap.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/init.h> |
| 37 | #include <linux/mount.h> |
| 38 | #include <linux/namei.h> |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 39 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/pci.h> |
Greg Kroah-Hartman | 7a54f25 | 2006-10-13 20:05:19 -0700 | [diff] [blame] | 41 | #include <linux/pci_hotplug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/uaccess.h> |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 43 | #include "../pci.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | #define MY_NAME "pci_hotplug" |
| 46 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 47 | #define dbg(fmt, arg...) do { if (debug) printk(KERN_DEBUG "%s: %s: " fmt , MY_NAME , __func__ , ## arg); } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #define err(format, arg...) printk(KERN_ERR "%s: " format , MY_NAME , ## arg) |
| 49 | #define info(format, arg...) printk(KERN_INFO "%s: " format , MY_NAME , ## arg) |
| 50 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format , MY_NAME , ## arg) |
| 51 | |
| 52 | |
| 53 | /* local variables */ |
| 54 | static int debug; |
| 55 | |
| 56 | #define DRIVER_VERSION "0.5" |
| 57 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Scott Murray <scottm@somanetworks.com>" |
| 58 | #define DRIVER_DESC "PCI Hot Plug PCI Core" |
| 59 | |
| 60 | |
| 61 | ////////////////////////////////////////////////////////////////// |
| 62 | |
| 63 | static LIST_HEAD(pci_hotplug_slot_list); |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 64 | static DEFINE_MUTEX(pci_hp_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #ifdef CONFIG_HOTPLUG_PCI_CPCI |
| 67 | extern int cpci_hotplug_init(int debug); |
| 68 | extern void cpci_hotplug_exit(void); |
| 69 | #else |
| 70 | static inline int cpci_hotplug_init(int debug) { return 0; } |
| 71 | static inline void cpci_hotplug_exit(void) { } |
| 72 | #endif |
| 73 | |
| 74 | /* Weee, fun with macros... */ |
| 75 | #define GET_STATUS(name,type) \ |
| 76 | static int get_##name (struct hotplug_slot *slot, type *value) \ |
| 77 | { \ |
| 78 | struct hotplug_slot_ops *ops = slot->ops; \ |
| 79 | int retval = 0; \ |
Kenji Kaneshige | bd1d985 | 2008-09-29 17:37:05 +0900 | [diff] [blame] | 80 | if (!try_module_get(ops->owner)) \ |
Zhao, Yu | c8761fe | 2008-09-22 14:26:05 +0800 | [diff] [blame] | 81 | return -ENODEV; \ |
| 82 | if (ops->get_##name) \ |
| 83 | retval = ops->get_##name(slot, value); \ |
| 84 | else \ |
| 85 | *value = slot->info->name; \ |
| 86 | module_put(ops->owner); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | return retval; \ |
| 88 | } |
| 89 | |
| 90 | GET_STATUS(power_status, u8) |
| 91 | GET_STATUS(attention_status, u8) |
| 92 | GET_STATUS(latch_status, u8) |
| 93 | GET_STATUS(adapter_status, u8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 95 | static ssize_t power_read_file(struct pci_slot *slot, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | { |
| 97 | int retval; |
| 98 | u8 value; |
| 99 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 100 | retval = get_power_status(slot->hotplug, &value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | if (retval) |
| 102 | goto exit; |
| 103 | retval = sprintf (buf, "%d\n", value); |
| 104 | exit: |
| 105 | return retval; |
| 106 | } |
| 107 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 108 | static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | size_t count) |
| 110 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 111 | struct hotplug_slot *slot = pci_slot->hotplug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | unsigned long lpower; |
| 113 | u8 power; |
| 114 | int retval = 0; |
| 115 | |
| 116 | lpower = simple_strtoul (buf, NULL, 10); |
| 117 | power = (u8)(lpower & 0xff); |
| 118 | dbg ("power = %d\n", power); |
| 119 | |
| 120 | if (!try_module_get(slot->ops->owner)) { |
| 121 | retval = -ENODEV; |
| 122 | goto exit; |
| 123 | } |
| 124 | switch (power) { |
| 125 | case 0: |
| 126 | if (slot->ops->disable_slot) |
| 127 | retval = slot->ops->disable_slot(slot); |
| 128 | break; |
| 129 | |
| 130 | case 1: |
| 131 | if (slot->ops->enable_slot) |
| 132 | retval = slot->ops->enable_slot(slot); |
| 133 | break; |
| 134 | |
| 135 | default: |
| 136 | err ("Illegal value specified for power\n"); |
| 137 | retval = -EINVAL; |
| 138 | } |
| 139 | module_put(slot->ops->owner); |
| 140 | |
| 141 | exit: |
| 142 | if (retval) |
| 143 | return retval; |
| 144 | return count; |
| 145 | } |
| 146 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 147 | static struct pci_slot_attribute hotplug_slot_attr_power = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
| 149 | .show = power_read_file, |
| 150 | .store = power_write_file |
| 151 | }; |
| 152 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 153 | static ssize_t attention_read_file(struct pci_slot *slot, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | { |
| 155 | int retval; |
| 156 | u8 value; |
| 157 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 158 | retval = get_attention_status(slot->hotplug, &value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | if (retval) |
| 160 | goto exit; |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 161 | retval = sprintf(buf, "%d\n", value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
| 163 | exit: |
| 164 | return retval; |
| 165 | } |
| 166 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 167 | static ssize_t attention_write_file(struct pci_slot *slot, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | size_t count) |
| 169 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 170 | struct hotplug_slot_ops *ops = slot->hotplug->ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | unsigned long lattention; |
| 172 | u8 attention; |
| 173 | int retval = 0; |
| 174 | |
| 175 | lattention = simple_strtoul (buf, NULL, 10); |
| 176 | attention = (u8)(lattention & 0xff); |
| 177 | dbg (" - attention = %d\n", attention); |
| 178 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 179 | if (!try_module_get(ops->owner)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | retval = -ENODEV; |
| 181 | goto exit; |
| 182 | } |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 183 | if (ops->set_attention_status) |
| 184 | retval = ops->set_attention_status(slot->hotplug, attention); |
| 185 | module_put(ops->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
| 187 | exit: |
| 188 | if (retval) |
| 189 | return retval; |
| 190 | return count; |
| 191 | } |
| 192 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 193 | static struct pci_slot_attribute hotplug_slot_attr_attention = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
| 195 | .show = attention_read_file, |
| 196 | .store = attention_write_file |
| 197 | }; |
| 198 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 199 | static ssize_t latch_read_file(struct pci_slot *slot, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | { |
| 201 | int retval; |
| 202 | u8 value; |
| 203 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 204 | retval = get_latch_status(slot->hotplug, &value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | if (retval) |
| 206 | goto exit; |
| 207 | retval = sprintf (buf, "%d\n", value); |
| 208 | |
| 209 | exit: |
| 210 | return retval; |
| 211 | } |
| 212 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 213 | static struct pci_slot_attribute hotplug_slot_attr_latch = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO}, |
| 215 | .show = latch_read_file, |
| 216 | }; |
| 217 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 218 | static ssize_t presence_read_file(struct pci_slot *slot, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | { |
| 220 | int retval; |
| 221 | u8 value; |
| 222 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 223 | retval = get_adapter_status(slot->hotplug, &value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | if (retval) |
| 225 | goto exit; |
| 226 | retval = sprintf (buf, "%d\n", value); |
| 227 | |
| 228 | exit: |
| 229 | return retval; |
| 230 | } |
| 231 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 232 | static struct pci_slot_attribute hotplug_slot_attr_presence = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO}, |
| 234 | .show = presence_read_file, |
| 235 | }; |
| 236 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 237 | static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | size_t count) |
| 239 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 240 | struct hotplug_slot *slot = pci_slot->hotplug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | unsigned long ltest; |
| 242 | u32 test; |
| 243 | int retval = 0; |
| 244 | |
| 245 | ltest = simple_strtoul (buf, NULL, 10); |
| 246 | test = (u32)(ltest & 0xffffffff); |
| 247 | dbg ("test = %d\n", test); |
| 248 | |
| 249 | if (!try_module_get(slot->ops->owner)) { |
| 250 | retval = -ENODEV; |
| 251 | goto exit; |
| 252 | } |
| 253 | if (slot->ops->hardware_test) |
| 254 | retval = slot->ops->hardware_test(slot, test); |
| 255 | module_put(slot->ops->owner); |
| 256 | |
| 257 | exit: |
| 258 | if (retval) |
| 259 | return retval; |
| 260 | return count; |
| 261 | } |
| 262 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 263 | static struct pci_slot_attribute hotplug_slot_attr_test = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
| 265 | .store = test_write_file |
| 266 | }; |
| 267 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 268 | static bool has_power_file(struct pci_slot *pci_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 270 | struct hotplug_slot *slot = pci_slot->hotplug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | if ((!slot) || (!slot->ops)) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 272 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | if ((slot->ops->enable_slot) || |
| 274 | (slot->ops->disable_slot) || |
| 275 | (slot->ops->get_power_status)) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 276 | return true; |
| 277 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | } |
| 279 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 280 | static bool has_attention_file(struct pci_slot *pci_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 282 | struct hotplug_slot *slot = pci_slot->hotplug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | if ((!slot) || (!slot->ops)) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 284 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | if ((slot->ops->set_attention_status) || |
| 286 | (slot->ops->get_attention_status)) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 287 | return true; |
| 288 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 291 | static bool has_latch_file(struct pci_slot *pci_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 293 | struct hotplug_slot *slot = pci_slot->hotplug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | if ((!slot) || (!slot->ops)) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 295 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | if (slot->ops->get_latch_status) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 297 | return true; |
| 298 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 301 | static bool has_adapter_file(struct pci_slot *pci_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 303 | struct hotplug_slot *slot = pci_slot->hotplug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | if ((!slot) || (!slot->ops)) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 305 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | if (slot->ops->get_adapter_status) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 307 | return true; |
| 308 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | } |
| 310 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 311 | static bool has_test_file(struct pci_slot *pci_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 313 | struct hotplug_slot *slot = pci_slot->hotplug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | if ((!slot) || (!slot->ops)) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 315 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (slot->ops->hardware_test) |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 317 | return true; |
| 318 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | } |
| 320 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 321 | static int fs_add_slot(struct pci_slot *slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | { |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 323 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 325 | /* Create symbolic link to the hotplug driver module */ |
| 326 | pci_hp_create_module_link(slot); |
| 327 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 328 | if (has_power_file(slot)) { |
| 329 | retval = sysfs_create_file(&slot->kobj, |
| 330 | &hotplug_slot_attr_power.attr); |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 331 | if (retval) |
| 332 | goto exit_power; |
| 333 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 335 | if (has_attention_file(slot)) { |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 336 | retval = sysfs_create_file(&slot->kobj, |
| 337 | &hotplug_slot_attr_attention.attr); |
| 338 | if (retval) |
| 339 | goto exit_attention; |
| 340 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 342 | if (has_latch_file(slot)) { |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 343 | retval = sysfs_create_file(&slot->kobj, |
| 344 | &hotplug_slot_attr_latch.attr); |
| 345 | if (retval) |
| 346 | goto exit_latch; |
| 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 349 | if (has_adapter_file(slot)) { |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 350 | retval = sysfs_create_file(&slot->kobj, |
| 351 | &hotplug_slot_attr_presence.attr); |
| 352 | if (retval) |
| 353 | goto exit_adapter; |
| 354 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 356 | if (has_test_file(slot)) { |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 357 | retval = sysfs_create_file(&slot->kobj, |
| 358 | &hotplug_slot_attr_test.attr); |
| 359 | if (retval) |
| 360 | goto exit_test; |
| 361 | } |
| 362 | |
| 363 | goto exit; |
| 364 | |
| 365 | exit_test: |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 366 | if (has_adapter_file(slot)) |
| 367 | sysfs_remove_file(&slot->kobj, |
| 368 | &hotplug_slot_attr_presence.attr); |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 369 | exit_adapter: |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 370 | if (has_latch_file(slot)) |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 371 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 372 | exit_latch: |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 373 | if (has_attention_file(slot)) |
| 374 | sysfs_remove_file(&slot->kobj, |
| 375 | &hotplug_slot_attr_attention.attr); |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 376 | exit_attention: |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 377 | if (has_power_file(slot)) |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 378 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); |
| 379 | exit_power: |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 380 | pci_hp_remove_module_link(slot); |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 381 | exit: |
| 382 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 385 | static void fs_remove_slot(struct pci_slot *slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | { |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 387 | if (has_power_file(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr); |
| 389 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 390 | if (has_attention_file(slot)) |
| 391 | sysfs_remove_file(&slot->kobj, |
| 392 | &hotplug_slot_attr_attention.attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 394 | if (has_latch_file(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr); |
| 396 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 397 | if (has_adapter_file(slot)) |
| 398 | sysfs_remove_file(&slot->kobj, |
| 399 | &hotplug_slot_attr_presence.attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Kenji Kaneshige | 498a8fa | 2009-06-16 11:00:47 +0900 | [diff] [blame] | 401 | if (has_test_file(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr); |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 403 | |
| 404 | pci_hp_remove_module_link(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | static struct hotplug_slot *get_slot_from_name (const char *name) |
| 408 | { |
| 409 | struct hotplug_slot *slot; |
| 410 | struct list_head *tmp; |
| 411 | |
| 412 | list_for_each (tmp, &pci_hotplug_slot_list) { |
| 413 | slot = list_entry (tmp, struct hotplug_slot, slot_list); |
Alex Chiang | 58319b8 | 2008-10-20 17:41:58 -0600 | [diff] [blame] | 414 | if (strcmp(hotplug_slot_name(slot), name) == 0) |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 415 | return slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 417 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
| 419 | |
| 420 | /** |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 421 | * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem |
Jesse Barnes | 65b943f | 2008-06-25 15:27:34 -0700 | [diff] [blame] | 422 | * @bus: bus this slot is on |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | * @slot: pointer to the &struct hotplug_slot to register |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 424 | * @devnr: device number |
Alex Chiang | 1359f27 | 2008-10-20 17:40:42 -0600 | [diff] [blame] | 425 | * @name: name registered with kobject core |
Randy Dunlap | 503998c | 2009-06-24 09:18:14 -0700 | [diff] [blame] | 426 | * @owner: caller module owner |
| 427 | * @mod_name: caller module name |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | * |
| 429 | * Registers a hotplug slot with the pci hotplug subsystem, which will allow |
| 430 | * userspace interaction to the slot. |
| 431 | * |
| 432 | * Returns 0 if successful, anything else for an error. |
| 433 | */ |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 434 | int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, |
| 435 | int devnr, const char *name, |
| 436 | struct module *owner, const char *mod_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
| 438 | int result; |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 439 | struct pci_slot *pci_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
| 441 | if (slot == NULL) |
| 442 | return -ENODEV; |
| 443 | if ((slot->info == NULL) || (slot->ops == NULL)) |
| 444 | return -EINVAL; |
| 445 | if (slot->release == NULL) { |
Joe Perches | a6f29a9 | 2007-11-19 17:48:29 -0800 | [diff] [blame] | 446 | dbg("Why are you trying to register a hotplug slot " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | "without a proper release function?\n"); |
| 448 | return -EINVAL; |
| 449 | } |
| 450 | |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 451 | slot->ops->owner = owner; |
| 452 | slot->ops->mod_name = mod_name; |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 453 | |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 454 | mutex_lock(&pci_hp_mutex); |
Alex Chiang | 8344b56 | 2008-06-10 15:30:42 -0600 | [diff] [blame] | 455 | /* |
| 456 | * No problems if we call this interface from both ACPI_PCI_SLOT |
| 457 | * driver and call it here again. If we've already created the |
| 458 | * pci_slot, the interface will simply bump the refcount. |
| 459 | */ |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 460 | pci_slot = pci_create_slot(bus, devnr, name, slot); |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 461 | if (IS_ERR(pci_slot)) { |
| 462 | result = PTR_ERR(pci_slot); |
Alex Chiang | 5fe6cc6 | 2008-10-20 17:41:02 -0600 | [diff] [blame] | 463 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
Greg Kroah-Hartman | 64dbcac | 2007-12-17 15:54:39 -0400 | [diff] [blame] | 465 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 466 | slot->pci_slot = pci_slot; |
| 467 | pci_slot->hotplug = slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 469 | list_add(&slot->slot_list, &pci_hotplug_slot_list); |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 470 | |
| 471 | result = fs_add_slot(pci_slot); |
| 472 | kobject_uevent(&pci_slot->kobj, KOBJ_ADD); |
Alex Chiang | 1359f27 | 2008-10-20 17:40:42 -0600 | [diff] [blame] | 473 | dbg("Added slot %s to the list\n", name); |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 474 | out: |
| 475 | mutex_unlock(&pci_hp_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | return result; |
| 477 | } |
| 478 | |
| 479 | /** |
| 480 | * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem |
Jesse Barnes | 65b943f | 2008-06-25 15:27:34 -0700 | [diff] [blame] | 481 | * @hotplug: pointer to the &struct hotplug_slot to deregister |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | * |
| 483 | * The @slot must have been registered with the pci hotplug subsystem |
| 484 | * previously with a call to pci_hp_register(). |
| 485 | * |
| 486 | * Returns 0 if successful, anything else for an error. |
| 487 | */ |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 488 | int pci_hp_deregister(struct hotplug_slot *hotplug) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | { |
| 490 | struct hotplug_slot *temp; |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 491 | struct pci_slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 493 | if (!hotplug) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | return -ENODEV; |
| 495 | |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 496 | mutex_lock(&pci_hp_mutex); |
Alex Chiang | 58319b8 | 2008-10-20 17:41:58 -0600 | [diff] [blame] | 497 | temp = get_slot_from_name(hotplug_slot_name(hotplug)); |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 498 | if (temp != hotplug) { |
| 499 | mutex_unlock(&pci_hp_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | return -ENODEV; |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 501 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 503 | list_del(&hotplug->slot_list); |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 504 | |
| 505 | slot = hotplug->pci_slot; |
| 506 | fs_remove_slot(slot); |
Alex Chiang | 58319b8 | 2008-10-20 17:41:58 -0600 | [diff] [blame] | 507 | dbg("Removed slot %s from the list\n", hotplug_slot_name(hotplug)); |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 508 | |
| 509 | hotplug->release(hotplug); |
| 510 | slot->hotplug = NULL; |
| 511 | pci_destroy_slot(slot); |
Kenji Kaneshige | 95cb909 | 2008-10-20 17:40:57 -0600 | [diff] [blame] | 512 | mutex_unlock(&pci_hp_mutex); |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * pci_hp_change_slot_info - changes the slot's information structure in the core |
Jesse Barnes | 65b943f | 2008-06-25 15:27:34 -0700 | [diff] [blame] | 519 | * @hotplug: pointer to the slot whose info has changed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | * @info: pointer to the info copy into the slot's info structure |
| 521 | * |
| 522 | * @slot must have been registered with the pci |
| 523 | * hotplug subsystem previously with a call to pci_hp_register(). |
| 524 | * |
| 525 | * Returns 0 if successful, anything else for an error. |
| 526 | */ |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 527 | int __must_check pci_hp_change_slot_info(struct hotplug_slot *hotplug, |
Greg Kroah-Hartman | 660a0e8 | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 528 | struct hotplug_slot_info *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | { |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 530 | struct pci_slot *slot; |
| 531 | if (!hotplug || !info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | return -ENODEV; |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 533 | slot = hotplug->pci_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 535 | memcpy(hotplug->info, info, sizeof(struct hotplug_slot_info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | static int __init pci_hotplug_init (void) |
| 541 | { |
| 542 | int result; |
Greg Kroah-Hartman | 0fed80f | 2007-11-01 19:41:16 -0700 | [diff] [blame] | 543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | result = cpci_hotplug_init(debug); |
| 545 | if (result) { |
| 546 | err ("cpci_hotplug_init with error %d\n", result); |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 547 | goto err_cpci; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
Greg Kroah-Hartman | 81ace5c | 2007-10-29 23:22:26 -0500 | [diff] [blame] | 551 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 552 | err_cpci: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | return result; |
| 554 | } |
| 555 | |
| 556 | static void __exit pci_hotplug_exit (void) |
| 557 | { |
| 558 | cpci_hotplug_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | module_init(pci_hotplug_init); |
| 562 | module_exit(pci_hotplug_exit); |
| 563 | |
| 564 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 565 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 566 | MODULE_LICENSE("GPL"); |
| 567 | module_param(debug, bool, 0644); |
| 568 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); |
| 569 | |
Kenji Kaneshige | c825bc9 | 2009-06-16 11:01:25 +0900 | [diff] [blame] | 570 | EXPORT_SYMBOL_GPL(__pci_hp_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | EXPORT_SYMBOL_GPL(pci_hp_deregister); |
| 572 | EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); |