Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * CompactPCI Hot Plug Driver |
| 3 | * |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 4 | * Copyright (C) 2002,2005 SOMA Networks, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (C) 2001 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 <scottm@somanetworks.com> |
| 26 | */ |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/pci.h> |
Greg Kroah-Hartman | 7a54f25 | 2006-10-13 20:05:19 -0700 | [diff] [blame] | 32 | #include <linux/pci_hotplug.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/init.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/smp_lock.h> |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 36 | #include <asm/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/delay.h> |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 38 | #include <linux/kthread.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "cpci_hotplug.h" |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define DRIVER_AUTHOR "Scott Murray <scottm@somanetworks.com>" |
| 42 | #define DRIVER_DESC "CompactPCI Hot Plug Core" |
| 43 | |
| 44 | #define MY_NAME "cpci_hotplug" |
| 45 | |
| 46 | #define dbg(format, arg...) \ |
| 47 | do { \ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 48 | if (cpci_debug) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | printk (KERN_DEBUG "%s: " format "\n", \ |
| 50 | MY_NAME , ## arg); \ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 51 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg) |
| 53 | #define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg) |
| 54 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg) |
| 55 | |
| 56 | /* local variables */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 57 | static DECLARE_RWSEM(list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | static LIST_HEAD(slot_list); |
| 59 | static int slots; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 60 | static atomic_t extracting; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | int cpci_debug; |
| 62 | static struct cpci_hp_controller *controller; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 63 | static struct task_struct *cpci_thread; |
| 64 | static int thread_finished; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | static int enable_slot(struct hotplug_slot *slot); |
| 67 | static int disable_slot(struct hotplug_slot *slot); |
| 68 | static int set_attention_status(struct hotplug_slot *slot, u8 value); |
| 69 | static int get_power_status(struct hotplug_slot *slot, u8 * value); |
| 70 | static int get_attention_status(struct hotplug_slot *slot, u8 * value); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 71 | static int get_adapter_status(struct hotplug_slot *slot, u8 * value); |
| 72 | static int get_latch_status(struct hotplug_slot *slot, u8 * value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | static struct hotplug_slot_ops cpci_hotplug_slot_ops = { |
| 75 | .owner = THIS_MODULE, |
| 76 | .enable_slot = enable_slot, |
| 77 | .disable_slot = disable_slot, |
| 78 | .set_attention_status = set_attention_status, |
| 79 | .get_power_status = get_power_status, |
| 80 | .get_attention_status = get_attention_status, |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 81 | .get_adapter_status = get_adapter_status, |
| 82 | .get_latch_status = get_latch_status, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | static int |
| 86 | update_latch_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 87 | { |
| 88 | struct hotplug_slot_info info; |
| 89 | |
| 90 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 91 | info.latch_status = value; |
| 92 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 93 | } |
| 94 | |
| 95 | static int |
| 96 | update_adapter_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 97 | { |
| 98 | struct hotplug_slot_info info; |
| 99 | |
| 100 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 101 | info.adapter_status = value; |
| 102 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 103 | } |
| 104 | |
| 105 | static int |
| 106 | enable_slot(struct hotplug_slot *hotplug_slot) |
| 107 | { |
| 108 | struct slot *slot = hotplug_slot->private; |
| 109 | int retval = 0; |
| 110 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 111 | dbg("%s - physical_slot = %s", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 113 | if (controller->ops->set_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | retval = controller->ops->set_power(slot, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | return retval; |
| 116 | } |
| 117 | |
| 118 | static int |
| 119 | disable_slot(struct hotplug_slot *hotplug_slot) |
| 120 | { |
| 121 | struct slot *slot = hotplug_slot->private; |
| 122 | int retval = 0; |
| 123 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 124 | dbg("%s - physical_slot = %s", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 126 | down_write(&list_rwsem); |
| 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | /* Unconfigure device */ |
| 129 | dbg("%s - unconfiguring slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 130 | __func__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 131 | if ((retval = cpci_unconfigure_slot(slot))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | err("%s - could not unconfigure slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 133 | __func__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 134 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | dbg("%s - finished unconfiguring slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 137 | __func__, slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | /* Clear EXT (by setting it) */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 140 | if (cpci_clear_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | err("%s - could not clear EXT for slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 142 | __func__, slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | retval = -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 144 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | cpci_led_on(slot); |
| 147 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 148 | if (controller->ops->set_power) |
| 149 | if ((retval = controller->ops->set_power(slot, 0))) |
| 150 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 152 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 155 | if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 156 | slot->extracting = 0; |
| 157 | atomic_dec(&extracting); |
| 158 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 159 | disable_error: |
| 160 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | return retval; |
| 162 | } |
| 163 | |
| 164 | static u8 |
| 165 | cpci_get_power_status(struct slot *slot) |
| 166 | { |
| 167 | u8 power = 1; |
| 168 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 169 | if (controller->ops->get_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | power = controller->ops->get_power(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | return power; |
| 172 | } |
| 173 | |
| 174 | static int |
| 175 | get_power_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 176 | { |
| 177 | struct slot *slot = hotplug_slot->private; |
| 178 | |
| 179 | *value = cpci_get_power_status(slot); |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | static int |
| 184 | get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 185 | { |
| 186 | struct slot *slot = hotplug_slot->private; |
| 187 | |
| 188 | *value = cpci_get_attention_status(slot); |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | static int |
| 193 | set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) |
| 194 | { |
| 195 | return cpci_set_attention_status(hotplug_slot->private, status); |
| 196 | } |
| 197 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 198 | static int |
| 199 | get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 200 | { |
| 201 | *value = hotplug_slot->info->adapter_status; |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | static int |
| 206 | get_latch_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 207 | { |
| 208 | *value = hotplug_slot->info->latch_status; |
| 209 | return 0; |
| 210 | } |
| 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 213 | { |
| 214 | struct slot *slot = hotplug_slot->private; |
| 215 | |
| 216 | kfree(slot->hotplug_slot->info); |
| 217 | kfree(slot->hotplug_slot->name); |
| 218 | kfree(slot->hotplug_slot); |
Scott Murray | 03e49d4 | 2005-06-06 15:48:04 -0400 | [diff] [blame] | 219 | if (slot->dev) |
| 220 | pci_dev_put(slot->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | kfree(slot); |
| 222 | } |
| 223 | |
| 224 | #define SLOT_NAME_SIZE 6 |
| 225 | static void |
| 226 | make_slot_name(struct slot *slot) |
| 227 | { |
| 228 | snprintf(slot->hotplug_slot->name, |
| 229 | SLOT_NAME_SIZE, "%02x:%02x", slot->bus->number, slot->number); |
| 230 | } |
| 231 | |
| 232 | int |
| 233 | cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) |
| 234 | { |
| 235 | struct slot *slot; |
| 236 | struct hotplug_slot *hotplug_slot; |
| 237 | struct hotplug_slot_info *info; |
| 238 | char *name; |
| 239 | int status = -ENOMEM; |
| 240 | int i; |
| 241 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 242 | if (!(controller && bus)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | /* |
| 246 | * Create a structure for each slot, and register that slot |
| 247 | * with the pci_hotplug subsystem. |
| 248 | */ |
| 249 | for (i = first; i <= last; ++i) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 250 | slot = kzalloc(sizeof (struct slot), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | if (!slot) |
| 252 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | hotplug_slot = |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 255 | kzalloc(sizeof (struct hotplug_slot), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | if (!hotplug_slot) |
| 257 | goto error_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | slot->hotplug_slot = hotplug_slot; |
| 259 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 260 | info = kzalloc(sizeof (struct hotplug_slot_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | if (!info) |
| 262 | goto error_hpslot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | hotplug_slot->info = info; |
| 264 | |
| 265 | name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); |
| 266 | if (!name) |
| 267 | goto error_info; |
| 268 | hotplug_slot->name = name; |
| 269 | |
| 270 | slot->bus = bus; |
| 271 | slot->number = i; |
| 272 | slot->devfn = PCI_DEVFN(i, 0); |
| 273 | |
| 274 | hotplug_slot->private = slot; |
| 275 | hotplug_slot->release = &release_slot; |
| 276 | make_slot_name(slot); |
| 277 | hotplug_slot->ops = &cpci_hotplug_slot_ops; |
| 278 | |
| 279 | /* |
| 280 | * Initialize the slot info structure with some known |
| 281 | * good values. |
| 282 | */ |
| 283 | dbg("initializing slot %s", slot->hotplug_slot->name); |
| 284 | info->power_status = cpci_get_power_status(slot); |
| 285 | info->attention_status = cpci_get_attention_status(slot); |
| 286 | |
| 287 | dbg("registering slot %s", slot->hotplug_slot->name); |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame^] | 288 | status = pci_hp_register(slot->hotplug_slot, bus, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | if (status) { |
| 290 | err("pci_hp_register failed with error %d", status); |
| 291 | goto error_name; |
| 292 | } |
| 293 | |
| 294 | /* Add slot to our internal list */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 295 | down_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | list_add(&slot->slot_list, &slot_list); |
| 297 | slots++; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 298 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | } |
| 300 | return 0; |
| 301 | error_name: |
| 302 | kfree(name); |
| 303 | error_info: |
| 304 | kfree(info); |
| 305 | error_hpslot: |
| 306 | kfree(hotplug_slot); |
| 307 | error_slot: |
| 308 | kfree(slot); |
| 309 | error: |
| 310 | return status; |
| 311 | } |
| 312 | |
| 313 | int |
| 314 | cpci_hp_unregister_bus(struct pci_bus *bus) |
| 315 | { |
| 316 | struct slot *slot; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 317 | struct slot *tmp; |
| 318 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 320 | down_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 321 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 322 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | return -1; |
| 324 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 325 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 326 | if (slot->bus == bus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | list_del(&slot->slot_list); |
| 328 | slots--; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 329 | |
| 330 | dbg("deregistering slot %s", slot->hotplug_slot->name); |
| 331 | status = pci_hp_deregister(slot->hotplug_slot); |
| 332 | if (status) { |
| 333 | err("pci_hp_deregister failed with error %d", |
| 334 | status); |
| 335 | break; |
| 336 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | } |
| 338 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 339 | up_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 340 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | /* This is the interrupt mode interrupt handler */ |
| 344 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 345 | cpci_hp_intr(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
| 347 | dbg("entered cpci_hp_intr"); |
| 348 | |
| 349 | /* Check to see if it was our interrupt */ |
Thomas Gleixner | 6b4486e | 2006-07-01 19:29:41 -0700 | [diff] [blame] | 350 | if ((controller->irq_flags & IRQF_SHARED) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | !controller->ops->check_irq(controller->dev_id)) { |
| 352 | dbg("exited cpci_hp_intr, not our interrupt"); |
| 353 | return IRQ_NONE; |
| 354 | } |
| 355 | |
| 356 | /* Disable ENUM interrupt */ |
| 357 | controller->ops->disable_irq(); |
| 358 | |
| 359 | /* Trigger processing by the event thread */ |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 360 | wake_up_process(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | return IRQ_HANDLED; |
| 362 | } |
| 363 | |
| 364 | /* |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 365 | * According to PICMG 2.1 R2.0, section 6.3.2, upon |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | * initialization, the system driver shall clear the |
| 367 | * INS bits of the cold-inserted devices. |
| 368 | */ |
| 369 | static int |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 370 | init_slots(int clear_ins) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
| 372 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | struct pci_dev* dev; |
| 374 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 375 | dbg("%s - enter", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 376 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 377 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 378 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | return -1; |
| 380 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 381 | list_for_each_entry(slot, &slot_list, slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | dbg("%s - looking at slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 383 | __func__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 384 | if (clear_ins && cpci_check_and_clear_ins(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | dbg("%s - cleared INS for slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 386 | __func__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 387 | dev = pci_get_slot(slot->bus, PCI_DEVFN(slot->number, 0)); |
| 388 | if (dev) { |
| 389 | if (update_adapter_status(slot->hotplug_slot, 1)) |
| 390 | warn("failure to update adapter file"); |
| 391 | if (update_latch_status(slot->hotplug_slot, 1)) |
| 392 | warn("failure to update latch file"); |
| 393 | slot->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 396 | up_read(&list_rwsem); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 397 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | static int |
| 402 | check_slots(void) |
| 403 | { |
| 404 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | int extracted; |
| 406 | int inserted; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 407 | u16 hs_csr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 409 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 410 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 411 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | err("no slots registered, shutting down"); |
| 413 | return -1; |
| 414 | } |
| 415 | extracted = inserted = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 416 | list_for_each_entry(slot, &slot_list, slot_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | dbg("%s - looking at slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 418 | __func__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 419 | if (cpci_check_and_clear_ins(slot)) { |
| 420 | /* |
| 421 | * Some broken hardware (e.g. PLX 9054AB) asserts |
| 422 | * ENUM# twice... |
| 423 | */ |
| 424 | if (slot->dev) { |
| 425 | warn("slot %s already inserted", |
| 426 | slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | inserted++; |
| 428 | continue; |
| 429 | } |
| 430 | |
| 431 | /* Process insertion */ |
| 432 | dbg("%s - slot %s inserted", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 433 | __func__, slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
| 435 | /* GSM, debug */ |
| 436 | hs_csr = cpci_get_hs_csr(slot); |
| 437 | dbg("%s - slot %s HS_CSR (1) = %04x", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 438 | __func__, slot->hotplug_slot->name, hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
| 440 | /* Configure device */ |
| 441 | dbg("%s - configuring slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 442 | __func__, slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 443 | if (cpci_configure_slot(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | err("%s - could not configure slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 445 | __func__, slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | continue; |
| 447 | } |
| 448 | dbg("%s - finished configuring slot %s", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 449 | __func__, slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
| 451 | /* GSM, debug */ |
| 452 | hs_csr = cpci_get_hs_csr(slot); |
| 453 | dbg("%s - slot %s HS_CSR (2) = %04x", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 454 | __func__, slot->hotplug_slot->name, hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 456 | if (update_latch_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | warn("failure to update latch file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 459 | if (update_adapter_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | cpci_led_off(slot); |
| 463 | |
| 464 | /* GSM, debug */ |
| 465 | hs_csr = cpci_get_hs_csr(slot); |
| 466 | dbg("%s - slot %s HS_CSR (3) = %04x", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 467 | __func__, slot->hotplug_slot->name, hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
| 469 | inserted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 470 | } else if (cpci_check_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | /* Process extraction request */ |
| 472 | dbg("%s - slot %s extracted", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 473 | __func__, slot->hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
| 475 | /* GSM, debug */ |
| 476 | hs_csr = cpci_get_hs_csr(slot); |
| 477 | dbg("%s - slot %s HS_CSR = %04x", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 478 | __func__, slot->hotplug_slot->name, hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 480 | if (!slot->extracting) { |
| 481 | if (update_latch_status(slot->hotplug_slot, 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | warn("failure to update latch file"); |
| 483 | } |
| 484 | slot->extracting = 1; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 485 | atomic_inc(&extracting); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | extracted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 488 | } else if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 489 | hs_csr = cpci_get_hs_csr(slot); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 490 | if (hs_csr == 0xffff) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 491 | /* |
| 492 | * Hmmm, we're likely hosed at this point, should we |
| 493 | * bother trying to tell the driver or not? |
| 494 | */ |
| 495 | err("card in slot %s was improperly removed", |
| 496 | slot->hotplug_slot->name); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 497 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 498 | warn("failure to update adapter file"); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 499 | slot->extracting = 0; |
| 500 | atomic_dec(&extracting); |
| 501 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 504 | up_read(&list_rwsem); |
| 505 | dbg("inserted=%d, extracted=%d, extracting=%d", |
| 506 | inserted, extracted, atomic_read(&extracting)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 507 | if (inserted || extracted) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | return extracted; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 509 | else if (!atomic_read(&extracting)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | err("cannot find ENUM# source, shutting down"); |
| 511 | return -1; |
| 512 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 513 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | /* This is the interrupt mode worker thread body */ |
| 517 | static int |
| 518 | event_thread(void *data) |
| 519 | { |
| 520 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 522 | dbg("%s - event thread started", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 523 | while (1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | dbg("event thread sleeping"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 525 | set_current_state(TASK_INTERRUPTIBLE); |
| 526 | schedule(); |
| 527 | if (kthread_should_stop()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | break; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 529 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | rc = check_slots(); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 531 | if (rc > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | /* Give userspace a chance to handle extraction */ |
| 533 | msleep(500); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 534 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 535 | dbg("%s - error checking slots", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 537 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 539 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
| 540 | if (kthread_should_stop()) |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 541 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | /* Re-enable ENUM# interrupt */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 544 | dbg("%s - re-enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | controller->ops->enable_irq(); |
| 546 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 547 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | /* This is the polling mode worker thread body */ |
| 552 | static int |
| 553 | poll_thread(void *data) |
| 554 | { |
| 555 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 557 | while (1) { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 558 | if (kthread_should_stop() || signal_pending(current)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | break; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 560 | if (controller->ops->query_enum()) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 561 | do { |
| 562 | rc = check_slots(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 563 | if (rc > 0) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 564 | /* Give userspace a chance to handle extraction */ |
| 565 | msleep(500); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 566 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 567 | dbg("%s - error checking slots", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 568 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 569 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 571 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | msleep(100); |
| 574 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 575 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static int |
| 580 | cpci_start_thread(void) |
| 581 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 582 | if (controller->irq) |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 583 | cpci_thread = kthread_run(event_thread, NULL, "cpci_hp_eventd"); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 584 | else |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 585 | cpci_thread = kthread_run(poll_thread, NULL, "cpci_hp_polld"); |
| 586 | if (IS_ERR(cpci_thread)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | err("Can't start up our thread"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 588 | return PTR_ERR(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 590 | thread_finished = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | static void |
| 595 | cpci_stop_thread(void) |
| 596 | { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 597 | kthread_stop(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | thread_finished = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | int |
| 602 | cpci_hp_register_controller(struct cpci_hp_controller *new_controller) |
| 603 | { |
| 604 | int status = 0; |
| 605 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 606 | if (controller) |
| 607 | return -1; |
| 608 | if (!(new_controller && new_controller->ops)) |
| 609 | return -EINVAL; |
| 610 | if (new_controller->irq) { |
| 611 | if (!(new_controller->ops->enable_irq && |
| 612 | new_controller->ops->disable_irq)) |
| 613 | status = -EINVAL; |
| 614 | if (request_irq(new_controller->irq, |
| 615 | cpci_hp_intr, |
| 616 | new_controller->irq_flags, |
| 617 | MY_NAME, |
| 618 | new_controller->dev_id)) { |
| 619 | err("Can't get irq %d for the hotplug cPCI controller", |
| 620 | new_controller->irq); |
| 621 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 623 | dbg("%s - acquired controller irq %d", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 624 | __func__, new_controller->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 626 | if (!status) |
| 627 | controller = new_controller; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | return status; |
| 629 | } |
| 630 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 631 | static void |
| 632 | cleanup_slots(void) |
| 633 | { |
| 634 | struct slot *slot; |
| 635 | struct slot *tmp; |
| 636 | |
| 637 | /* |
| 638 | * Unregister all of our slots with the pci_hotplug subsystem, |
| 639 | * and free up all memory that we had allocated. |
| 640 | */ |
| 641 | down_write(&list_rwsem); |
| 642 | if (!slots) |
| 643 | goto cleanup_null; |
| 644 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 645 | list_del(&slot->slot_list); |
| 646 | pci_hp_deregister(slot->hotplug_slot); |
| 647 | } |
| 648 | cleanup_null: |
| 649 | up_write(&list_rwsem); |
| 650 | return; |
| 651 | } |
| 652 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | int |
| 654 | cpci_hp_unregister_controller(struct cpci_hp_controller *old_controller) |
| 655 | { |
| 656 | int status = 0; |
| 657 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 658 | if (controller) { |
| 659 | if (!thread_finished) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | cpci_stop_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 661 | if (controller->irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | free_irq(controller->irq, controller->dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | controller = NULL; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 664 | cleanup_slots(); |
| 665 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | return status; |
| 668 | } |
| 669 | |
| 670 | int |
| 671 | cpci_hp_start(void) |
| 672 | { |
| 673 | static int first = 1; |
| 674 | int status; |
| 675 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 676 | dbg("%s - enter", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 677 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 680 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 681 | if (list_empty(&slot_list)) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 682 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | return -ENODEV; |
| 684 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 685 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 687 | status = init_slots(first); |
| 688 | if (first) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | first = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 690 | if (status) |
| 691 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
| 693 | status = cpci_start_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 694 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | return status; |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 696 | dbg("%s - thread started", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 698 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | /* Start enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 700 | dbg("%s - enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | controller->ops->enable_irq(); |
| 702 | } |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 703 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | return 0; |
| 705 | } |
| 706 | |
| 707 | int |
| 708 | cpci_hp_stop(void) |
| 709 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 710 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | return -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 712 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | /* Stop enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 714 | dbg("%s - disabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | controller->ops->disable_irq(); |
| 716 | } |
| 717 | cpci_stop_thread(); |
| 718 | return 0; |
| 719 | } |
| 720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | int __init |
| 722 | cpci_hotplug_init(int debug) |
| 723 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | cpci_debug = debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | void __exit |
| 729 | cpci_hotplug_exit(void) |
| 730 | { |
| 731 | /* |
| 732 | * Clean everything up. |
| 733 | */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 734 | cpci_hp_stop(); |
| 735 | cpci_hp_unregister_controller(controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | EXPORT_SYMBOL_GPL(cpci_hp_register_controller); |
| 739 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_controller); |
| 740 | EXPORT_SYMBOL_GPL(cpci_hp_register_bus); |
| 741 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_bus); |
| 742 | EXPORT_SYMBOL_GPL(cpci_hp_start); |
| 743 | EXPORT_SYMBOL_GPL(cpci_hp_stop); |