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> |
Arun Sharma | 6006349 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 35 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/delay.h> |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 37 | #include <linux/kthread.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "cpci_hotplug.h" |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define DRIVER_AUTHOR "Scott Murray <scottm@somanetworks.com>" |
| 41 | #define DRIVER_DESC "CompactPCI Hot Plug Core" |
| 42 | |
| 43 | #define MY_NAME "cpci_hotplug" |
| 44 | |
| 45 | #define dbg(format, arg...) \ |
| 46 | do { \ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 47 | if (cpci_debug) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | printk (KERN_DEBUG "%s: " format "\n", \ |
| 49 | MY_NAME , ## arg); \ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 50 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg) |
| 52 | #define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg) |
| 53 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg) |
| 54 | |
| 55 | /* local variables */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 56 | static DECLARE_RWSEM(list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | static LIST_HEAD(slot_list); |
| 58 | static int slots; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 59 | static atomic_t extracting; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | int cpci_debug; |
| 61 | static struct cpci_hp_controller *controller; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 62 | static struct task_struct *cpci_thread; |
| 63 | static int thread_finished; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | static int enable_slot(struct hotplug_slot *slot); |
| 66 | static int disable_slot(struct hotplug_slot *slot); |
| 67 | static int set_attention_status(struct hotplug_slot *slot, u8 value); |
| 68 | static int get_power_status(struct hotplug_slot *slot, u8 * value); |
| 69 | static int get_attention_status(struct hotplug_slot *slot, u8 * value); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 70 | static int get_adapter_status(struct hotplug_slot *slot, u8 * value); |
| 71 | static int get_latch_status(struct hotplug_slot *slot, u8 * value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | static struct hotplug_slot_ops cpci_hotplug_slot_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | .enable_slot = enable_slot, |
| 75 | .disable_slot = disable_slot, |
| 76 | .set_attention_status = set_attention_status, |
| 77 | .get_power_status = get_power_status, |
| 78 | .get_attention_status = get_attention_status, |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 79 | .get_adapter_status = get_adapter_status, |
| 80 | .get_latch_status = get_latch_status, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | }; |
| 82 | |
| 83 | static int |
| 84 | update_latch_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 85 | { |
| 86 | struct hotplug_slot_info info; |
| 87 | |
| 88 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 89 | info.latch_status = value; |
| 90 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 91 | } |
| 92 | |
| 93 | static int |
| 94 | update_adapter_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 95 | { |
| 96 | struct hotplug_slot_info info; |
| 97 | |
| 98 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 99 | info.adapter_status = value; |
| 100 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 101 | } |
| 102 | |
| 103 | static int |
| 104 | enable_slot(struct hotplug_slot *hotplug_slot) |
| 105 | { |
| 106 | struct slot *slot = hotplug_slot->private; |
| 107 | int retval = 0; |
| 108 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 109 | dbg("%s - physical_slot = %s", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 111 | if (controller->ops->set_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | retval = controller->ops->set_power(slot, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | return retval; |
| 114 | } |
| 115 | |
| 116 | static int |
| 117 | disable_slot(struct hotplug_slot *hotplug_slot) |
| 118 | { |
| 119 | struct slot *slot = hotplug_slot->private; |
| 120 | int retval = 0; |
| 121 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 122 | dbg("%s - physical_slot = %s", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 124 | down_write(&list_rwsem); |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | /* Unconfigure device */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 127 | dbg("%s - unconfiguring slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 128 | if ((retval = cpci_unconfigure_slot(slot))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | err("%s - could not unconfigure slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 130 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 131 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 133 | dbg("%s - finished unconfiguring slot %s", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
| 135 | /* Clear EXT (by setting it) */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 136 | if (cpci_clear_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | err("%s - could not clear EXT for slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 138 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | retval = -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 140 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | cpci_led_on(slot); |
| 143 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 144 | if (controller->ops->set_power) |
| 145 | if ((retval = controller->ops->set_power(slot, 0))) |
| 146 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 148 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 151 | if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 152 | slot->extracting = 0; |
| 153 | atomic_dec(&extracting); |
| 154 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 155 | disable_error: |
| 156 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return retval; |
| 158 | } |
| 159 | |
| 160 | static u8 |
| 161 | cpci_get_power_status(struct slot *slot) |
| 162 | { |
| 163 | u8 power = 1; |
| 164 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 165 | if (controller->ops->get_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | power = controller->ops->get_power(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | return power; |
| 168 | } |
| 169 | |
| 170 | static int |
| 171 | get_power_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 172 | { |
| 173 | struct slot *slot = hotplug_slot->private; |
| 174 | |
| 175 | *value = cpci_get_power_status(slot); |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int |
| 180 | get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 181 | { |
| 182 | struct slot *slot = hotplug_slot->private; |
| 183 | |
| 184 | *value = cpci_get_attention_status(slot); |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | static int |
| 189 | set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) |
| 190 | { |
| 191 | return cpci_set_attention_status(hotplug_slot->private, status); |
| 192 | } |
| 193 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 194 | static int |
| 195 | get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 196 | { |
| 197 | *value = hotplug_slot->info->adapter_status; |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | static int |
| 202 | get_latch_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 203 | { |
| 204 | *value = hotplug_slot->info->latch_status; |
| 205 | return 0; |
| 206 | } |
| 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 209 | { |
| 210 | struct slot *slot = hotplug_slot->private; |
| 211 | |
| 212 | kfree(slot->hotplug_slot->info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | kfree(slot->hotplug_slot); |
Scott Murray | 03e49d4 | 2005-06-06 15:48:04 -0400 | [diff] [blame] | 214 | if (slot->dev) |
| 215 | pci_dev_put(slot->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | kfree(slot); |
| 217 | } |
| 218 | |
| 219 | #define SLOT_NAME_SIZE 6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
| 221 | int |
| 222 | cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) |
| 223 | { |
| 224 | struct slot *slot; |
| 225 | struct hotplug_slot *hotplug_slot; |
| 226 | struct hotplug_slot_info *info; |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 227 | char name[SLOT_NAME_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | int status = -ENOMEM; |
| 229 | int i; |
| 230 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 231 | if (!(controller && bus)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | /* |
| 235 | * Create a structure for each slot, and register that slot |
| 236 | * with the pci_hotplug subsystem. |
| 237 | */ |
| 238 | for (i = first; i <= last; ++i) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 239 | slot = kzalloc(sizeof (struct slot), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | if (!slot) |
| 241 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
| 243 | hotplug_slot = |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 244 | kzalloc(sizeof (struct hotplug_slot), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | if (!hotplug_slot) |
| 246 | goto error_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | slot->hotplug_slot = hotplug_slot; |
| 248 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 249 | info = kzalloc(sizeof (struct hotplug_slot_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | if (!info) |
| 251 | goto error_hpslot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | hotplug_slot->info = info; |
| 253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | slot->bus = bus; |
| 255 | slot->number = i; |
| 256 | slot->devfn = PCI_DEVFN(i, 0); |
| 257 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 258 | snprintf(name, SLOT_NAME_SIZE, "%02x:%02x", bus->number, i); |
| 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | hotplug_slot->private = slot; |
| 261 | hotplug_slot->release = &release_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | hotplug_slot->ops = &cpci_hotplug_slot_ops; |
| 263 | |
| 264 | /* |
| 265 | * Initialize the slot info structure with some known |
| 266 | * good values. |
| 267 | */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 268 | dbg("initializing slot %s", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | info->power_status = cpci_get_power_status(slot); |
| 270 | info->attention_status = cpci_get_attention_status(slot); |
| 271 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 272 | dbg("registering slot %s", name); |
| 273 | status = pci_hp_register(slot->hotplug_slot, bus, i, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | if (status) { |
| 275 | err("pci_hp_register failed with error %d", status); |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 276 | goto error_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 278 | dbg("slot registered with name: %s", slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
| 280 | /* Add slot to our internal list */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 281 | down_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | list_add(&slot->slot_list, &slot_list); |
| 283 | slots++; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 284 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | } |
| 286 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | error_info: |
| 288 | kfree(info); |
| 289 | error_hpslot: |
| 290 | kfree(hotplug_slot); |
| 291 | error_slot: |
| 292 | kfree(slot); |
| 293 | error: |
| 294 | return status; |
| 295 | } |
| 296 | |
| 297 | int |
| 298 | cpci_hp_unregister_bus(struct pci_bus *bus) |
| 299 | { |
| 300 | struct slot *slot; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 301 | struct slot *tmp; |
| 302 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 304 | down_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 305 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 306 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | return -1; |
| 308 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 309 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 310 | if (slot->bus == bus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | list_del(&slot->slot_list); |
| 312 | slots--; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 313 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 314 | dbg("deregistering slot %s", slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 315 | status = pci_hp_deregister(slot->hotplug_slot); |
| 316 | if (status) { |
| 317 | err("pci_hp_deregister failed with error %d", |
| 318 | status); |
| 319 | break; |
| 320 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
| 322 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 323 | up_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 324 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | /* This is the interrupt mode interrupt handler */ |
| 328 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 329 | cpci_hp_intr(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | { |
| 331 | dbg("entered cpci_hp_intr"); |
| 332 | |
| 333 | /* Check to see if it was our interrupt */ |
Thomas Gleixner | 6b4486e | 2006-07-01 19:29:41 -0700 | [diff] [blame] | 334 | if ((controller->irq_flags & IRQF_SHARED) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | !controller->ops->check_irq(controller->dev_id)) { |
| 336 | dbg("exited cpci_hp_intr, not our interrupt"); |
| 337 | return IRQ_NONE; |
| 338 | } |
| 339 | |
| 340 | /* Disable ENUM interrupt */ |
| 341 | controller->ops->disable_irq(); |
| 342 | |
| 343 | /* Trigger processing by the event thread */ |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 344 | wake_up_process(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | return IRQ_HANDLED; |
| 346 | } |
| 347 | |
| 348 | /* |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 349 | * According to PICMG 2.1 R2.0, section 6.3.2, upon |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | * initialization, the system driver shall clear the |
| 351 | * INS bits of the cold-inserted devices. |
| 352 | */ |
| 353 | static int |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 354 | init_slots(int clear_ins) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
| 356 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | struct pci_dev* dev; |
| 358 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 359 | dbg("%s - enter", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 360 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 361 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 362 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | return -1; |
| 364 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 365 | list_for_each_entry(slot, &slot_list, slot_list) { |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 366 | dbg("%s - looking at slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 367 | if (clear_ins && cpci_check_and_clear_ins(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | dbg("%s - cleared INS for slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 369 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 370 | dev = pci_get_slot(slot->bus, PCI_DEVFN(slot->number, 0)); |
| 371 | if (dev) { |
| 372 | if (update_adapter_status(slot->hotplug_slot, 1)) |
| 373 | warn("failure to update adapter file"); |
| 374 | if (update_latch_status(slot->hotplug_slot, 1)) |
| 375 | warn("failure to update latch file"); |
| 376 | slot->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
| 378 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 379 | up_read(&list_rwsem); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 380 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | static int |
| 385 | check_slots(void) |
| 386 | { |
| 387 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | int extracted; |
| 389 | int inserted; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 390 | u16 hs_csr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 392 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 393 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 394 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | err("no slots registered, shutting down"); |
| 396 | return -1; |
| 397 | } |
| 398 | extracted = inserted = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 399 | list_for_each_entry(slot, &slot_list, slot_list) { |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 400 | dbg("%s - looking at slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 401 | if (cpci_check_and_clear_ins(slot)) { |
| 402 | /* |
| 403 | * Some broken hardware (e.g. PLX 9054AB) asserts |
| 404 | * ENUM# twice... |
| 405 | */ |
| 406 | if (slot->dev) { |
| 407 | warn("slot %s already inserted", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 408 | slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | inserted++; |
| 410 | continue; |
| 411 | } |
| 412 | |
| 413 | /* Process insertion */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 414 | dbg("%s - slot %s inserted", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
| 416 | /* GSM, debug */ |
| 417 | hs_csr = cpci_get_hs_csr(slot); |
| 418 | dbg("%s - slot %s HS_CSR (1) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 419 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
| 421 | /* Configure device */ |
| 422 | dbg("%s - configuring slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 423 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 424 | if (cpci_configure_slot(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | err("%s - could not configure slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 426 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | continue; |
| 428 | } |
| 429 | dbg("%s - finished configuring slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 430 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
| 432 | /* GSM, debug */ |
| 433 | hs_csr = cpci_get_hs_csr(slot); |
| 434 | dbg("%s - slot %s HS_CSR (2) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 435 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 437 | if (update_latch_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | warn("failure to update latch file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 440 | if (update_adapter_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
| 443 | cpci_led_off(slot); |
| 444 | |
| 445 | /* GSM, debug */ |
| 446 | hs_csr = cpci_get_hs_csr(slot); |
| 447 | dbg("%s - slot %s HS_CSR (3) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 448 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
| 450 | inserted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 451 | } else if (cpci_check_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | /* Process extraction request */ |
| 453 | dbg("%s - slot %s extracted", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 454 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
| 456 | /* GSM, debug */ |
| 457 | hs_csr = cpci_get_hs_csr(slot); |
| 458 | dbg("%s - slot %s HS_CSR = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 459 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 461 | if (!slot->extracting) { |
| 462 | if (update_latch_status(slot->hotplug_slot, 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | warn("failure to update latch file"); |
| 464 | } |
| 465 | slot->extracting = 1; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 466 | atomic_inc(&extracting); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | } |
| 468 | extracted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 469 | } else if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 470 | hs_csr = cpci_get_hs_csr(slot); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 471 | if (hs_csr == 0xffff) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 472 | /* |
| 473 | * Hmmm, we're likely hosed at this point, should we |
| 474 | * bother trying to tell the driver or not? |
| 475 | */ |
| 476 | err("card in slot %s was improperly removed", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 477 | slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 478 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 479 | warn("failure to update adapter file"); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 480 | slot->extracting = 0; |
| 481 | atomic_dec(&extracting); |
| 482 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | } |
| 484 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 485 | up_read(&list_rwsem); |
| 486 | dbg("inserted=%d, extracted=%d, extracting=%d", |
| 487 | inserted, extracted, atomic_read(&extracting)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 488 | if (inserted || extracted) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | return extracted; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 490 | else if (!atomic_read(&extracting)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | err("cannot find ENUM# source, shutting down"); |
| 492 | return -1; |
| 493 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 494 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | /* This is the interrupt mode worker thread body */ |
| 498 | static int |
| 499 | event_thread(void *data) |
| 500 | { |
| 501 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 503 | dbg("%s - event thread started", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 504 | while (1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | dbg("event thread sleeping"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 506 | set_current_state(TASK_INTERRUPTIBLE); |
| 507 | schedule(); |
| 508 | if (kthread_should_stop()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | break; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 510 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | rc = check_slots(); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 512 | if (rc > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | /* Give userspace a chance to handle extraction */ |
| 514 | msleep(500); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 515 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 516 | dbg("%s - error checking slots", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 518 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 520 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
| 521 | if (kthread_should_stop()) |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 522 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | /* Re-enable ENUM# interrupt */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 525 | dbg("%s - re-enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | controller->ops->enable_irq(); |
| 527 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 528 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | /* This is the polling mode worker thread body */ |
| 533 | static int |
| 534 | poll_thread(void *data) |
| 535 | { |
| 536 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 538 | while (1) { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 539 | if (kthread_should_stop() || signal_pending(current)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | break; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 541 | if (controller->ops->query_enum()) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 542 | do { |
| 543 | rc = check_slots(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 544 | if (rc > 0) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 545 | /* Give userspace a chance to handle extraction */ |
| 546 | msleep(500); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 547 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 548 | dbg("%s - error checking slots", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 549 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 550 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 552 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | msleep(100); |
| 555 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 556 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | return 0; |
| 558 | } |
| 559 | |
| 560 | static int |
| 561 | cpci_start_thread(void) |
| 562 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 563 | if (controller->irq) |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 564 | cpci_thread = kthread_run(event_thread, NULL, "cpci_hp_eventd"); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 565 | else |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 566 | cpci_thread = kthread_run(poll_thread, NULL, "cpci_hp_polld"); |
| 567 | if (IS_ERR(cpci_thread)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | err("Can't start up our thread"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 569 | return PTR_ERR(cpci_thread); |
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 | thread_finished = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | return 0; |
| 573 | } |
| 574 | |
| 575 | static void |
| 576 | cpci_stop_thread(void) |
| 577 | { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 578 | kthread_stop(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | thread_finished = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | int |
| 583 | cpci_hp_register_controller(struct cpci_hp_controller *new_controller) |
| 584 | { |
| 585 | int status = 0; |
| 586 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 587 | if (controller) |
| 588 | return -1; |
| 589 | if (!(new_controller && new_controller->ops)) |
| 590 | return -EINVAL; |
| 591 | if (new_controller->irq) { |
| 592 | if (!(new_controller->ops->enable_irq && |
| 593 | new_controller->ops->disable_irq)) |
| 594 | status = -EINVAL; |
| 595 | if (request_irq(new_controller->irq, |
| 596 | cpci_hp_intr, |
| 597 | new_controller->irq_flags, |
| 598 | MY_NAME, |
| 599 | new_controller->dev_id)) { |
| 600 | err("Can't get irq %d for the hotplug cPCI controller", |
| 601 | new_controller->irq); |
| 602 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 604 | dbg("%s - acquired controller irq %d", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 605 | __func__, new_controller->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 607 | if (!status) |
| 608 | controller = new_controller; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | return status; |
| 610 | } |
| 611 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 612 | static void |
| 613 | cleanup_slots(void) |
| 614 | { |
| 615 | struct slot *slot; |
| 616 | struct slot *tmp; |
| 617 | |
| 618 | /* |
| 619 | * Unregister all of our slots with the pci_hotplug subsystem, |
| 620 | * and free up all memory that we had allocated. |
| 621 | */ |
| 622 | down_write(&list_rwsem); |
| 623 | if (!slots) |
| 624 | goto cleanup_null; |
| 625 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 626 | list_del(&slot->slot_list); |
| 627 | pci_hp_deregister(slot->hotplug_slot); |
| 628 | } |
| 629 | cleanup_null: |
| 630 | up_write(&list_rwsem); |
| 631 | return; |
| 632 | } |
| 633 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | int |
| 635 | cpci_hp_unregister_controller(struct cpci_hp_controller *old_controller) |
| 636 | { |
| 637 | int status = 0; |
| 638 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 639 | if (controller) { |
| 640 | if (!thread_finished) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | cpci_stop_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 642 | if (controller->irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | free_irq(controller->irq, controller->dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | controller = NULL; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 645 | cleanup_slots(); |
| 646 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | return status; |
| 649 | } |
| 650 | |
| 651 | int |
| 652 | cpci_hp_start(void) |
| 653 | { |
| 654 | static int first = 1; |
| 655 | int status; |
| 656 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 657 | dbg("%s - enter", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 658 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 661 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 662 | if (list_empty(&slot_list)) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 663 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | return -ENODEV; |
| 665 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 666 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 668 | status = init_slots(first); |
| 669 | if (first) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | first = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 671 | if (status) |
| 672 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
| 674 | status = cpci_start_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 675 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | return status; |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 677 | dbg("%s - thread started", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 679 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | /* Start enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 681 | dbg("%s - enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | controller->ops->enable_irq(); |
| 683 | } |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 684 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | int |
| 689 | cpci_hp_stop(void) |
| 690 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 691 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | return -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 693 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | /* Stop enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 695 | dbg("%s - disabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | controller->ops->disable_irq(); |
| 697 | } |
| 698 | cpci_stop_thread(); |
| 699 | return 0; |
| 700 | } |
| 701 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | int __init |
| 703 | cpci_hotplug_init(int debug) |
| 704 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | cpci_debug = debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return 0; |
| 707 | } |
| 708 | |
| 709 | void __exit |
| 710 | cpci_hotplug_exit(void) |
| 711 | { |
| 712 | /* |
| 713 | * Clean everything up. |
| 714 | */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 715 | cpci_hp_stop(); |
| 716 | cpci_hp_unregister_controller(controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | } |
| 718 | |
| 719 | EXPORT_SYMBOL_GPL(cpci_hp_register_controller); |
| 720 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_controller); |
| 721 | EXPORT_SYMBOL_GPL(cpci_hp_register_bus); |
| 722 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_bus); |
| 723 | EXPORT_SYMBOL_GPL(cpci_hp_start); |
| 724 | EXPORT_SYMBOL_GPL(cpci_hp_stop); |