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 = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | .enable_slot = enable_slot, |
| 76 | .disable_slot = disable_slot, |
| 77 | .set_attention_status = set_attention_status, |
| 78 | .get_power_status = get_power_status, |
| 79 | .get_attention_status = get_attention_status, |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 80 | .get_adapter_status = get_adapter_status, |
| 81 | .get_latch_status = get_latch_status, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | }; |
| 83 | |
| 84 | static int |
| 85 | update_latch_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 86 | { |
| 87 | struct hotplug_slot_info info; |
| 88 | |
| 89 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 90 | info.latch_status = value; |
| 91 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 92 | } |
| 93 | |
| 94 | static int |
| 95 | update_adapter_status(struct hotplug_slot *hotplug_slot, u8 value) |
| 96 | { |
| 97 | struct hotplug_slot_info info; |
| 98 | |
| 99 | memcpy(&info, hotplug_slot->info, sizeof(struct hotplug_slot_info)); |
| 100 | info.adapter_status = value; |
| 101 | return pci_hp_change_slot_info(hotplug_slot, &info); |
| 102 | } |
| 103 | |
| 104 | static int |
| 105 | enable_slot(struct hotplug_slot *hotplug_slot) |
| 106 | { |
| 107 | struct slot *slot = hotplug_slot->private; |
| 108 | int retval = 0; |
| 109 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 110 | dbg("%s - physical_slot = %s", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 112 | if (controller->ops->set_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | retval = controller->ops->set_power(slot, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return retval; |
| 115 | } |
| 116 | |
| 117 | static int |
| 118 | disable_slot(struct hotplug_slot *hotplug_slot) |
| 119 | { |
| 120 | struct slot *slot = hotplug_slot->private; |
| 121 | int retval = 0; |
| 122 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 123 | dbg("%s - physical_slot = %s", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 125 | down_write(&list_rwsem); |
| 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | /* Unconfigure device */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 128 | dbg("%s - unconfiguring slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 129 | if ((retval = cpci_unconfigure_slot(slot))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | err("%s - could not unconfigure slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 131 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 132 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 134 | dbg("%s - finished unconfiguring slot %s", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
| 136 | /* Clear EXT (by setting it) */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 137 | if (cpci_clear_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | err("%s - could not clear EXT for slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 139 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | retval = -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 141 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | cpci_led_on(slot); |
| 144 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 145 | if (controller->ops->set_power) |
| 146 | if ((retval = controller->ops->set_power(slot, 0))) |
| 147 | goto disable_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 149 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | warn("failure to update adapter file"); |
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 (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 153 | slot->extracting = 0; |
| 154 | atomic_dec(&extracting); |
| 155 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 156 | disable_error: |
| 157 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | return retval; |
| 159 | } |
| 160 | |
| 161 | static u8 |
| 162 | cpci_get_power_status(struct slot *slot) |
| 163 | { |
| 164 | u8 power = 1; |
| 165 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 166 | if (controller->ops->get_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | power = controller->ops->get_power(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | return power; |
| 169 | } |
| 170 | |
| 171 | static int |
| 172 | get_power_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 173 | { |
| 174 | struct slot *slot = hotplug_slot->private; |
| 175 | |
| 176 | *value = cpci_get_power_status(slot); |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | static int |
| 181 | get_attention_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 182 | { |
| 183 | struct slot *slot = hotplug_slot->private; |
| 184 | |
| 185 | *value = cpci_get_attention_status(slot); |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static int |
| 190 | set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) |
| 191 | { |
| 192 | return cpci_set_attention_status(hotplug_slot->private, status); |
| 193 | } |
| 194 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 195 | static int |
| 196 | get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 197 | { |
| 198 | *value = hotplug_slot->info->adapter_status; |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | static int |
| 203 | get_latch_status(struct hotplug_slot *hotplug_slot, u8 * value) |
| 204 | { |
| 205 | *value = hotplug_slot->info->latch_status; |
| 206 | return 0; |
| 207 | } |
| 208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 210 | { |
| 211 | struct slot *slot = hotplug_slot->private; |
| 212 | |
| 213 | kfree(slot->hotplug_slot->info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | kfree(slot->hotplug_slot); |
Scott Murray | 03e49d4 | 2005-06-06 15:48:04 -0400 | [diff] [blame] | 215 | if (slot->dev) |
| 216 | pci_dev_put(slot->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | kfree(slot); |
| 218 | } |
| 219 | |
| 220 | #define SLOT_NAME_SIZE 6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
| 222 | int |
| 223 | cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) |
| 224 | { |
| 225 | struct slot *slot; |
| 226 | struct hotplug_slot *hotplug_slot; |
| 227 | struct hotplug_slot_info *info; |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 228 | char name[SLOT_NAME_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | int status = -ENOMEM; |
| 230 | int i; |
| 231 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 232 | if (!(controller && bus)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
| 235 | /* |
| 236 | * Create a structure for each slot, and register that slot |
| 237 | * with the pci_hotplug subsystem. |
| 238 | */ |
| 239 | for (i = first; i <= last; ++i) { |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 240 | slot = kzalloc(sizeof (struct slot), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if (!slot) |
| 242 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
| 244 | hotplug_slot = |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 245 | kzalloc(sizeof (struct hotplug_slot), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (!hotplug_slot) |
| 247 | goto error_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | slot->hotplug_slot = hotplug_slot; |
| 249 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 250 | info = kzalloc(sizeof (struct hotplug_slot_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | if (!info) |
| 252 | goto error_hpslot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | hotplug_slot->info = info; |
| 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | slot->bus = bus; |
| 256 | slot->number = i; |
| 257 | slot->devfn = PCI_DEVFN(i, 0); |
| 258 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 259 | snprintf(name, SLOT_NAME_SIZE, "%02x:%02x", bus->number, i); |
| 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | hotplug_slot->private = slot; |
| 262 | hotplug_slot->release = &release_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | hotplug_slot->ops = &cpci_hotplug_slot_ops; |
| 264 | |
| 265 | /* |
| 266 | * Initialize the slot info structure with some known |
| 267 | * good values. |
| 268 | */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 269 | dbg("initializing slot %s", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | info->power_status = cpci_get_power_status(slot); |
| 271 | info->attention_status = cpci_get_attention_status(slot); |
| 272 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 273 | dbg("registering slot %s", name); |
| 274 | status = pci_hp_register(slot->hotplug_slot, bus, i, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | if (status) { |
| 276 | err("pci_hp_register failed with error %d", status); |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 277 | goto error_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | } |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 279 | dbg("slot registered with name: %s", slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | /* Add slot to our internal list */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 282 | down_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | list_add(&slot->slot_list, &slot_list); |
| 284 | slots++; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 285 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | } |
| 287 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | error_info: |
| 289 | kfree(info); |
| 290 | error_hpslot: |
| 291 | kfree(hotplug_slot); |
| 292 | error_slot: |
| 293 | kfree(slot); |
| 294 | error: |
| 295 | return status; |
| 296 | } |
| 297 | |
| 298 | int |
| 299 | cpci_hp_unregister_bus(struct pci_bus *bus) |
| 300 | { |
| 301 | struct slot *slot; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 302 | struct slot *tmp; |
| 303 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 305 | down_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 306 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 307 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | return -1; |
| 309 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 310 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 311 | if (slot->bus == bus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | list_del(&slot->slot_list); |
| 313 | slots--; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 314 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 315 | dbg("deregistering slot %s", slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 316 | status = pci_hp_deregister(slot->hotplug_slot); |
| 317 | if (status) { |
| 318 | err("pci_hp_deregister failed with error %d", |
| 319 | status); |
| 320 | break; |
| 321 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | } |
| 323 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 324 | up_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 325 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | /* This is the interrupt mode interrupt handler */ |
| 329 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 330 | cpci_hp_intr(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
| 332 | dbg("entered cpci_hp_intr"); |
| 333 | |
| 334 | /* Check to see if it was our interrupt */ |
Thomas Gleixner | 6b4486e | 2006-07-01 19:29:41 -0700 | [diff] [blame] | 335 | if ((controller->irq_flags & IRQF_SHARED) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | !controller->ops->check_irq(controller->dev_id)) { |
| 337 | dbg("exited cpci_hp_intr, not our interrupt"); |
| 338 | return IRQ_NONE; |
| 339 | } |
| 340 | |
| 341 | /* Disable ENUM interrupt */ |
| 342 | controller->ops->disable_irq(); |
| 343 | |
| 344 | /* Trigger processing by the event thread */ |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 345 | wake_up_process(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | return IRQ_HANDLED; |
| 347 | } |
| 348 | |
| 349 | /* |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 350 | * According to PICMG 2.1 R2.0, section 6.3.2, upon |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | * initialization, the system driver shall clear the |
| 352 | * INS bits of the cold-inserted devices. |
| 353 | */ |
| 354 | static int |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 355 | init_slots(int clear_ins) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
| 357 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | struct pci_dev* dev; |
| 359 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 360 | dbg("%s - enter", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 361 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 362 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 363 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | return -1; |
| 365 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 366 | list_for_each_entry(slot, &slot_list, slot_list) { |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 367 | dbg("%s - looking at slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 368 | if (clear_ins && cpci_check_and_clear_ins(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | dbg("%s - cleared INS for slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 370 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 371 | dev = pci_get_slot(slot->bus, PCI_DEVFN(slot->number, 0)); |
| 372 | if (dev) { |
| 373 | if (update_adapter_status(slot->hotplug_slot, 1)) |
| 374 | warn("failure to update adapter file"); |
| 375 | if (update_latch_status(slot->hotplug_slot, 1)) |
| 376 | warn("failure to update latch file"); |
| 377 | slot->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
| 379 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 380 | up_read(&list_rwsem); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 381 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | static int |
| 386 | check_slots(void) |
| 387 | { |
| 388 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | int extracted; |
| 390 | int inserted; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 391 | u16 hs_csr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 393 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 394 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 395 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | err("no slots registered, shutting down"); |
| 397 | return -1; |
| 398 | } |
| 399 | extracted = inserted = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 400 | list_for_each_entry(slot, &slot_list, slot_list) { |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 401 | dbg("%s - looking at slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 402 | if (cpci_check_and_clear_ins(slot)) { |
| 403 | /* |
| 404 | * Some broken hardware (e.g. PLX 9054AB) asserts |
| 405 | * ENUM# twice... |
| 406 | */ |
| 407 | if (slot->dev) { |
| 408 | warn("slot %s already inserted", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 409 | slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | inserted++; |
| 411 | continue; |
| 412 | } |
| 413 | |
| 414 | /* Process insertion */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 415 | dbg("%s - slot %s inserted", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
| 417 | /* GSM, debug */ |
| 418 | hs_csr = cpci_get_hs_csr(slot); |
| 419 | dbg("%s - slot %s HS_CSR (1) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 420 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | /* Configure device */ |
| 423 | dbg("%s - configuring slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 424 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 425 | if (cpci_configure_slot(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | err("%s - could not configure slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 427 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | continue; |
| 429 | } |
| 430 | dbg("%s - finished configuring slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 431 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | /* GSM, debug */ |
| 434 | hs_csr = cpci_get_hs_csr(slot); |
| 435 | dbg("%s - slot %s HS_CSR (2) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 436 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 438 | if (update_latch_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | warn("failure to update latch file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 441 | if (update_adapter_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
| 444 | cpci_led_off(slot); |
| 445 | |
| 446 | /* GSM, debug */ |
| 447 | hs_csr = cpci_get_hs_csr(slot); |
| 448 | dbg("%s - slot %s HS_CSR (3) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 449 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
| 451 | inserted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 452 | } else if (cpci_check_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | /* Process extraction request */ |
| 454 | dbg("%s - slot %s extracted", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 455 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
| 457 | /* GSM, debug */ |
| 458 | hs_csr = cpci_get_hs_csr(slot); |
| 459 | dbg("%s - slot %s HS_CSR = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 460 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 462 | if (!slot->extracting) { |
| 463 | if (update_latch_status(slot->hotplug_slot, 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | warn("failure to update latch file"); |
| 465 | } |
| 466 | slot->extracting = 1; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 467 | atomic_inc(&extracting); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | extracted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 470 | } else if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 471 | hs_csr = cpci_get_hs_csr(slot); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 472 | if (hs_csr == 0xffff) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 473 | /* |
| 474 | * Hmmm, we're likely hosed at this point, should we |
| 475 | * bother trying to tell the driver or not? |
| 476 | */ |
| 477 | err("card in slot %s was improperly removed", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 478 | slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 479 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 480 | warn("failure to update adapter file"); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 481 | slot->extracting = 0; |
| 482 | atomic_dec(&extracting); |
| 483 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | } |
| 485 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 486 | up_read(&list_rwsem); |
| 487 | dbg("inserted=%d, extracted=%d, extracting=%d", |
| 488 | inserted, extracted, atomic_read(&extracting)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 489 | if (inserted || extracted) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | return extracted; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 491 | else if (!atomic_read(&extracting)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | err("cannot find ENUM# source, shutting down"); |
| 493 | return -1; |
| 494 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 495 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | /* This is the interrupt mode worker thread body */ |
| 499 | static int |
| 500 | event_thread(void *data) |
| 501 | { |
| 502 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 504 | dbg("%s - event thread started", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 505 | while (1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | dbg("event thread sleeping"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 507 | set_current_state(TASK_INTERRUPTIBLE); |
| 508 | schedule(); |
| 509 | if (kthread_should_stop()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | break; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 511 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | rc = check_slots(); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 513 | if (rc > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | /* Give userspace a chance to handle extraction */ |
| 515 | msleep(500); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 516 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 517 | dbg("%s - error checking slots", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 519 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 521 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
| 522 | if (kthread_should_stop()) |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 523 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
| 525 | /* Re-enable ENUM# interrupt */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 526 | dbg("%s - re-enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | controller->ops->enable_irq(); |
| 528 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 529 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | return 0; |
| 531 | } |
| 532 | |
| 533 | /* This is the polling mode worker thread body */ |
| 534 | static int |
| 535 | poll_thread(void *data) |
| 536 | { |
| 537 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 539 | while (1) { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 540 | if (kthread_should_stop() || signal_pending(current)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | break; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 542 | if (controller->ops->query_enum()) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 543 | do { |
| 544 | rc = check_slots(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 545 | if (rc > 0) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 546 | /* Give userspace a chance to handle extraction */ |
| 547 | msleep(500); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 548 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 549 | dbg("%s - error checking slots", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 550 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 551 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 553 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | msleep(100); |
| 556 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 557 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | static int |
| 562 | cpci_start_thread(void) |
| 563 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 564 | if (controller->irq) |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 565 | cpci_thread = kthread_run(event_thread, NULL, "cpci_hp_eventd"); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 566 | else |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 567 | cpci_thread = kthread_run(poll_thread, NULL, "cpci_hp_polld"); |
| 568 | if (IS_ERR(cpci_thread)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | err("Can't start up our thread"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 570 | return PTR_ERR(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 572 | thread_finished = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | static void |
| 577 | cpci_stop_thread(void) |
| 578 | { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 579 | kthread_stop(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | thread_finished = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | } |
| 582 | |
| 583 | int |
| 584 | cpci_hp_register_controller(struct cpci_hp_controller *new_controller) |
| 585 | { |
| 586 | int status = 0; |
| 587 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 588 | if (controller) |
| 589 | return -1; |
| 590 | if (!(new_controller && new_controller->ops)) |
| 591 | return -EINVAL; |
| 592 | if (new_controller->irq) { |
| 593 | if (!(new_controller->ops->enable_irq && |
| 594 | new_controller->ops->disable_irq)) |
| 595 | status = -EINVAL; |
| 596 | if (request_irq(new_controller->irq, |
| 597 | cpci_hp_intr, |
| 598 | new_controller->irq_flags, |
| 599 | MY_NAME, |
| 600 | new_controller->dev_id)) { |
| 601 | err("Can't get irq %d for the hotplug cPCI controller", |
| 602 | new_controller->irq); |
| 603 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 605 | dbg("%s - acquired controller irq %d", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 606 | __func__, new_controller->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 608 | if (!status) |
| 609 | controller = new_controller; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | return status; |
| 611 | } |
| 612 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 613 | static void |
| 614 | cleanup_slots(void) |
| 615 | { |
| 616 | struct slot *slot; |
| 617 | struct slot *tmp; |
| 618 | |
| 619 | /* |
| 620 | * Unregister all of our slots with the pci_hotplug subsystem, |
| 621 | * and free up all memory that we had allocated. |
| 622 | */ |
| 623 | down_write(&list_rwsem); |
| 624 | if (!slots) |
| 625 | goto cleanup_null; |
| 626 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 627 | list_del(&slot->slot_list); |
| 628 | pci_hp_deregister(slot->hotplug_slot); |
| 629 | } |
| 630 | cleanup_null: |
| 631 | up_write(&list_rwsem); |
| 632 | return; |
| 633 | } |
| 634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | int |
| 636 | cpci_hp_unregister_controller(struct cpci_hp_controller *old_controller) |
| 637 | { |
| 638 | int status = 0; |
| 639 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 640 | if (controller) { |
| 641 | if (!thread_finished) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | cpci_stop_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 643 | if (controller->irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | free_irq(controller->irq, controller->dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | controller = NULL; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 646 | cleanup_slots(); |
| 647 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | return status; |
| 650 | } |
| 651 | |
| 652 | int |
| 653 | cpci_hp_start(void) |
| 654 | { |
| 655 | static int first = 1; |
| 656 | int status; |
| 657 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 658 | dbg("%s - enter", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 659 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 662 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 663 | if (list_empty(&slot_list)) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 664 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | return -ENODEV; |
| 666 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 667 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 669 | status = init_slots(first); |
| 670 | if (first) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | first = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 672 | if (status) |
| 673 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
| 675 | status = cpci_start_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 676 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | return status; |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 678 | dbg("%s - thread started", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 680 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | /* Start enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 682 | dbg("%s - enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | controller->ops->enable_irq(); |
| 684 | } |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 685 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | return 0; |
| 687 | } |
| 688 | |
| 689 | int |
| 690 | cpci_hp_stop(void) |
| 691 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 692 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | return -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 694 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | /* Stop enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 696 | dbg("%s - disabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | controller->ops->disable_irq(); |
| 698 | } |
| 699 | cpci_stop_thread(); |
| 700 | return 0; |
| 701 | } |
| 702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | int __init |
| 704 | cpci_hotplug_init(int debug) |
| 705 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | cpci_debug = debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | return 0; |
| 708 | } |
| 709 | |
| 710 | void __exit |
| 711 | cpci_hotplug_exit(void) |
| 712 | { |
| 713 | /* |
| 714 | * Clean everything up. |
| 715 | */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 716 | cpci_hp_stop(); |
| 717 | cpci_hp_unregister_controller(controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | EXPORT_SYMBOL_GPL(cpci_hp_register_controller); |
| 721 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_controller); |
| 722 | EXPORT_SYMBOL_GPL(cpci_hp_register_bus); |
| 723 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_bus); |
| 724 | EXPORT_SYMBOL_GPL(cpci_hp_start); |
| 725 | EXPORT_SYMBOL_GPL(cpci_hp_stop); |