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 | 60063497 | 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) \ |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [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) |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [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) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 68 | static int get_power_status(struct hotplug_slot *slot, u8 *value); |
| 69 | static int get_attention_status(struct hotplug_slot *slot, u8 *value); |
| 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)); |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 128 | retval = cpci_unconfigure_slot(slot); |
| 129 | if (retval) { |
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 | |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 145 | if (controller->ops->set_power) { |
| 146 | retval = controller->ops->set_power(slot, 0); |
| 147 | if (retval) |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 148 | goto disable_error; |
Quentin Lambert | 79e50e7 | 2014-09-07 20:03:32 +0200 | [diff] [blame] | 149 | } |
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 (update_adapter_status(slot->hotplug_slot, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 154 | if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 155 | slot->extracting = 0; |
| 156 | atomic_dec(&extracting); |
| 157 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 158 | disable_error: |
| 159 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | return retval; |
| 161 | } |
| 162 | |
| 163 | static u8 |
| 164 | cpci_get_power_status(struct slot *slot) |
| 165 | { |
| 166 | u8 power = 1; |
| 167 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 168 | if (controller->ops->get_power) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | power = controller->ops->get_power(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | return power; |
| 171 | } |
| 172 | |
| 173 | static int |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 174 | get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | { |
| 176 | struct slot *slot = hotplug_slot->private; |
| 177 | |
| 178 | *value = cpci_get_power_status(slot); |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static int |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 183 | get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
| 185 | struct slot *slot = hotplug_slot->private; |
| 186 | |
| 187 | *value = cpci_get_attention_status(slot); |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int |
| 192 | set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) |
| 193 | { |
| 194 | return cpci_set_attention_status(hotplug_slot->private, status); |
| 195 | } |
| 196 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 197 | static int |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 198 | get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 199 | { |
| 200 | *value = hotplug_slot->info->adapter_status; |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | static int |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 205 | get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 206 | { |
| 207 | *value = hotplug_slot->info->latch_status; |
| 208 | return 0; |
| 209 | } |
| 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 212 | { |
| 213 | struct slot *slot = hotplug_slot->private; |
| 214 | |
| 215 | kfree(slot->hotplug_slot->info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | kfree(slot->hotplug_slot); |
Markus Elfring | 17f14b5 | 2014-12-26 16:28:08 -0700 | [diff] [blame] | 217 | pci_dev_put(slot->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | kfree(slot); |
| 219 | } |
| 220 | |
| 221 | #define SLOT_NAME_SIZE 6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | int |
| 224 | cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) |
| 225 | { |
| 226 | struct slot *slot; |
| 227 | struct hotplug_slot *hotplug_slot; |
| 228 | struct hotplug_slot_info *info; |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 229 | char name[SLOT_NAME_SIZE]; |
Julia Lawall | 83d0571 | 2012-07-16 09:25:56 -0600 | [diff] [blame] | 230 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | int i; |
| 232 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 233 | if (!(controller && bus)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
| 236 | /* |
| 237 | * Create a structure for each slot, and register that slot |
| 238 | * with the pci_hotplug subsystem. |
| 239 | */ |
| 240 | for (i = first; i <= last; ++i) { |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 241 | slot = kzalloc(sizeof(struct slot), GFP_KERNEL); |
Julia Lawall | 83d0571 | 2012-07-16 09:25:56 -0600 | [diff] [blame] | 242 | if (!slot) { |
| 243 | status = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | goto error; |
Julia Lawall | 83d0571 | 2012-07-16 09:25:56 -0600 | [diff] [blame] | 245 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | hotplug_slot = |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 248 | kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); |
Julia Lawall | 83d0571 | 2012-07-16 09:25:56 -0600 | [diff] [blame] | 249 | if (!hotplug_slot) { |
| 250 | status = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | goto error_slot; |
Julia Lawall | 83d0571 | 2012-07-16 09:25:56 -0600 | [diff] [blame] | 252 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | slot->hotplug_slot = hotplug_slot; |
| 254 | |
Bogicevic Sasa | ff3ce48 | 2015-12-27 13:21:11 -0800 | [diff] [blame] | 255 | info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); |
Julia Lawall | 83d0571 | 2012-07-16 09:25:56 -0600 | [diff] [blame] | 256 | if (!info) { |
| 257 | status = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | goto error_hpslot; |
Julia Lawall | 83d0571 | 2012-07-16 09:25:56 -0600 | [diff] [blame] | 259 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | hotplug_slot->info = info; |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | slot->bus = bus; |
| 263 | slot->number = i; |
| 264 | slot->devfn = PCI_DEVFN(i, 0); |
| 265 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 266 | snprintf(name, SLOT_NAME_SIZE, "%02x:%02x", bus->number, i); |
| 267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | hotplug_slot->private = slot; |
| 269 | hotplug_slot->release = &release_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | hotplug_slot->ops = &cpci_hotplug_slot_ops; |
| 271 | |
| 272 | /* |
| 273 | * Initialize the slot info structure with some known |
| 274 | * good values. |
| 275 | */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 276 | dbg("initializing slot %s", name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | info->power_status = cpci_get_power_status(slot); |
| 278 | info->attention_status = cpci_get_attention_status(slot); |
| 279 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 280 | dbg("registering slot %s", name); |
| 281 | status = pci_hp_register(slot->hotplug_slot, bus, i, name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | if (status) { |
| 283 | err("pci_hp_register failed with error %d", status); |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 284 | goto error_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | } |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 286 | dbg("slot registered with name: %s", slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | /* Add slot to our internal list */ |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 289 | down_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | list_add(&slot->slot_list, &slot_list); |
| 291 | slots++; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 292 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | } |
| 294 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | error_info: |
| 296 | kfree(info); |
| 297 | error_hpslot: |
| 298 | kfree(hotplug_slot); |
| 299 | error_slot: |
| 300 | kfree(slot); |
| 301 | error: |
| 302 | return status; |
| 303 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 304 | EXPORT_SYMBOL_GPL(cpci_hp_register_bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | int |
| 307 | cpci_hp_unregister_bus(struct pci_bus *bus) |
| 308 | { |
| 309 | struct slot *slot; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 310 | struct slot *tmp; |
| 311 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 313 | down_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 314 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 315 | up_write(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | return -1; |
| 317 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 318 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 319 | if (slot->bus == bus) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | list_del(&slot->slot_list); |
| 321 | slots--; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 322 | |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 323 | dbg("deregistering slot %s", slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 324 | status = pci_hp_deregister(slot->hotplug_slot); |
| 325 | if (status) { |
| 326 | err("pci_hp_deregister failed with error %d", |
| 327 | status); |
| 328 | break; |
| 329 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 332 | up_write(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 333 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 335 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | /* This is the interrupt mode interrupt handler */ |
| 338 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 339 | cpci_hp_intr(int irq, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | { |
| 341 | dbg("entered cpci_hp_intr"); |
| 342 | |
| 343 | /* Check to see if it was our interrupt */ |
Thomas Gleixner | 6b4486e | 2006-07-01 19:29:41 -0700 | [diff] [blame] | 344 | if ((controller->irq_flags & IRQF_SHARED) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | !controller->ops->check_irq(controller->dev_id)) { |
| 346 | dbg("exited cpci_hp_intr, not our interrupt"); |
| 347 | return IRQ_NONE; |
| 348 | } |
| 349 | |
| 350 | /* Disable ENUM interrupt */ |
| 351 | controller->ops->disable_irq(); |
| 352 | |
| 353 | /* Trigger processing by the event thread */ |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 354 | wake_up_process(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | return IRQ_HANDLED; |
| 356 | } |
| 357 | |
| 358 | /* |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 359 | * According to PICMG 2.1 R2.0, section 6.3.2, upon |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | * initialization, the system driver shall clear the |
| 361 | * INS bits of the cold-inserted devices. |
| 362 | */ |
| 363 | static int |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 364 | init_slots(int clear_ins) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | { |
| 366 | struct slot *slot; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 367 | struct pci_dev *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 369 | dbg("%s - enter", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 370 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 371 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 372 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | return -1; |
| 374 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 375 | list_for_each_entry(slot, &slot_list, slot_list) { |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 376 | dbg("%s - looking at slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 377 | if (clear_ins && cpci_check_and_clear_ins(slot)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | dbg("%s - cleared INS for slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 379 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 380 | dev = pci_get_slot(slot->bus, PCI_DEVFN(slot->number, 0)); |
| 381 | if (dev) { |
| 382 | if (update_adapter_status(slot->hotplug_slot, 1)) |
| 383 | warn("failure to update adapter file"); |
| 384 | if (update_latch_status(slot->hotplug_slot, 1)) |
| 385 | warn("failure to update latch file"); |
| 386 | slot->dev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | } |
| 388 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 389 | up_read(&list_rwsem); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 390 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | static int |
| 395 | check_slots(void) |
| 396 | { |
| 397 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | int extracted; |
| 399 | int inserted; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 400 | u16 hs_csr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 402 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 403 | if (!slots) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 404 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | err("no slots registered, shutting down"); |
| 406 | return -1; |
| 407 | } |
| 408 | extracted = inserted = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 409 | list_for_each_entry(slot, &slot_list, slot_list) { |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 410 | dbg("%s - looking at slot %s", __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 411 | if (cpci_check_and_clear_ins(slot)) { |
| 412 | /* |
| 413 | * Some broken hardware (e.g. PLX 9054AB) asserts |
| 414 | * ENUM# twice... |
| 415 | */ |
| 416 | if (slot->dev) { |
| 417 | warn("slot %s already inserted", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 418 | slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | inserted++; |
| 420 | continue; |
| 421 | } |
| 422 | |
| 423 | /* Process insertion */ |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 424 | dbg("%s - slot %s inserted", __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
| 426 | /* GSM, debug */ |
| 427 | hs_csr = cpci_get_hs_csr(slot); |
| 428 | dbg("%s - slot %s HS_CSR (1) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 429 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
| 431 | /* Configure device */ |
| 432 | dbg("%s - configuring slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 433 | __func__, slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 434 | if (cpci_configure_slot(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | err("%s - could not configure slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 436 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | continue; |
| 438 | } |
| 439 | dbg("%s - finished configuring slot %s", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 440 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
| 442 | /* GSM, debug */ |
| 443 | hs_csr = cpci_get_hs_csr(slot); |
| 444 | dbg("%s - slot %s HS_CSR (2) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 445 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 447 | if (update_latch_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | warn("failure to update latch file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 450 | if (update_adapter_status(slot->hotplug_slot, 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | warn("failure to update adapter file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
| 453 | cpci_led_off(slot); |
| 454 | |
| 455 | /* GSM, debug */ |
| 456 | hs_csr = cpci_get_hs_csr(slot); |
| 457 | dbg("%s - slot %s HS_CSR (3) = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 458 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | inserted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 461 | } else if (cpci_check_ext(slot)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | /* Process extraction request */ |
| 463 | dbg("%s - slot %s extracted", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 464 | __func__, slot_name(slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
| 466 | /* GSM, debug */ |
| 467 | hs_csr = cpci_get_hs_csr(slot); |
| 468 | dbg("%s - slot %s HS_CSR = %04x", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 469 | __func__, slot_name(slot), hs_csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 471 | if (!slot->extracting) { |
Quentin Lambert | 656f978 | 2014-09-07 20:02:47 +0200 | [diff] [blame] | 472 | if (update_latch_status(slot->hotplug_slot, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | warn("failure to update latch file"); |
Quentin Lambert | 656f978 | 2014-09-07 20:02:47 +0200 | [diff] [blame] | 474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | slot->extracting = 1; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 476 | atomic_inc(&extracting); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
| 478 | extracted++; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 479 | } else if (slot->extracting) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 480 | hs_csr = cpci_get_hs_csr(slot); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 481 | if (hs_csr == 0xffff) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 482 | /* |
| 483 | * Hmmm, we're likely hosed at this point, should we |
| 484 | * bother trying to tell the driver or not? |
| 485 | */ |
| 486 | err("card in slot %s was improperly removed", |
Alex Chiang | d6c479e | 2008-10-20 17:41:17 -0600 | [diff] [blame] | 487 | slot_name(slot)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 488 | if (update_adapter_status(slot->hotplug_slot, 0)) |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 489 | warn("failure to update adapter file"); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 490 | slot->extracting = 0; |
| 491 | atomic_dec(&extracting); |
| 492 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } |
| 494 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 495 | up_read(&list_rwsem); |
| 496 | dbg("inserted=%d, extracted=%d, extracting=%d", |
| 497 | inserted, extracted, atomic_read(&extracting)); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 498 | if (inserted || extracted) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | return extracted; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 500 | else if (!atomic_read(&extracting)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | err("cannot find ENUM# source, shutting down"); |
| 502 | return -1; |
| 503 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 504 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | /* This is the interrupt mode worker thread body */ |
| 508 | static int |
| 509 | event_thread(void *data) |
| 510 | { |
| 511 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 513 | dbg("%s - event thread started", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 514 | while (1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | dbg("event thread sleeping"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 516 | set_current_state(TASK_INTERRUPTIBLE); |
| 517 | schedule(); |
| 518 | if (kthread_should_stop()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | break; |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 520 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | rc = check_slots(); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 522 | if (rc > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | /* Give userspace a chance to handle extraction */ |
| 524 | msleep(500); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 525 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 526 | dbg("%s - error checking slots", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 528 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 530 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
| 531 | if (kthread_should_stop()) |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 532 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
| 534 | /* Re-enable ENUM# interrupt */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 535 | dbg("%s - re-enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | controller->ops->enable_irq(); |
| 537 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 538 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | /* This is the polling mode worker thread body */ |
| 543 | static int |
| 544 | poll_thread(void *data) |
| 545 | { |
| 546 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 548 | while (1) { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 549 | if (kthread_should_stop() || signal_pending(current)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | break; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 551 | if (controller->ops->query_enum()) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 552 | do { |
| 553 | rc = check_slots(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 554 | if (rc > 0) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 555 | /* Give userspace a chance to handle extraction */ |
| 556 | msleep(500); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 557 | } else if (rc < 0) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 558 | dbg("%s - error checking slots", __func__); |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 559 | thread_finished = 1; |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 560 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 562 | } while (atomic_read(&extracting) && !kthread_should_stop()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | msleep(100); |
| 565 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 566 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | return 0; |
| 568 | } |
| 569 | |
| 570 | static int |
| 571 | cpci_start_thread(void) |
| 572 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 573 | if (controller->irq) |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 574 | cpci_thread = kthread_run(event_thread, NULL, "cpci_hp_eventd"); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 575 | else |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 576 | cpci_thread = kthread_run(poll_thread, NULL, "cpci_hp_polld"); |
| 577 | if (IS_ERR(cpci_thread)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | err("Can't start up our thread"); |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 579 | return PTR_ERR(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | } |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 581 | thread_finished = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | return 0; |
| 583 | } |
| 584 | |
| 585 | static void |
| 586 | cpci_stop_thread(void) |
| 587 | { |
Scott Murray | 0bec2c8 | 2007-07-09 11:55:57 -0700 | [diff] [blame] | 588 | kthread_stop(cpci_thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | thread_finished = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | int |
| 593 | cpci_hp_register_controller(struct cpci_hp_controller *new_controller) |
| 594 | { |
| 595 | int status = 0; |
| 596 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 597 | if (controller) |
| 598 | return -1; |
| 599 | if (!(new_controller && new_controller->ops)) |
| 600 | return -EINVAL; |
| 601 | if (new_controller->irq) { |
| 602 | if (!(new_controller->ops->enable_irq && |
| 603 | new_controller->ops->disable_irq)) |
| 604 | status = -EINVAL; |
| 605 | if (request_irq(new_controller->irq, |
| 606 | cpci_hp_intr, |
| 607 | new_controller->irq_flags, |
| 608 | MY_NAME, |
| 609 | new_controller->dev_id)) { |
| 610 | err("Can't get irq %d for the hotplug cPCI controller", |
| 611 | new_controller->irq); |
| 612 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 614 | dbg("%s - acquired controller irq %d", |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 615 | __func__, new_controller->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | } |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 617 | if (!status) |
| 618 | controller = new_controller; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | return status; |
| 620 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 621 | EXPORT_SYMBOL_GPL(cpci_hp_register_controller); |
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 | static void |
| 624 | cleanup_slots(void) |
| 625 | { |
| 626 | struct slot *slot; |
| 627 | struct slot *tmp; |
| 628 | |
| 629 | /* |
| 630 | * Unregister all of our slots with the pci_hotplug subsystem, |
| 631 | * and free up all memory that we had allocated. |
| 632 | */ |
| 633 | down_write(&list_rwsem); |
| 634 | if (!slots) |
| 635 | goto cleanup_null; |
| 636 | list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) { |
| 637 | list_del(&slot->slot_list); |
| 638 | pci_hp_deregister(slot->hotplug_slot); |
| 639 | } |
| 640 | cleanup_null: |
| 641 | up_write(&list_rwsem); |
| 642 | return; |
| 643 | } |
| 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | int |
| 646 | cpci_hp_unregister_controller(struct cpci_hp_controller *old_controller) |
| 647 | { |
| 648 | int status = 0; |
| 649 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 650 | if (controller) { |
| 651 | if (!thread_finished) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | cpci_stop_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 653 | if (controller->irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | free_irq(controller->irq, controller->dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | controller = NULL; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 656 | cleanup_slots(); |
| 657 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | status = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | return status; |
| 660 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 661 | EXPORT_SYMBOL_GPL(cpci_hp_unregister_controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | |
| 663 | int |
| 664 | cpci_hp_start(void) |
| 665 | { |
| 666 | static int first = 1; |
| 667 | int status; |
| 668 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 669 | dbg("%s - enter", __func__); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 670 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 673 | down_read(&list_rwsem); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 674 | if (list_empty(&slot_list)) { |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 675 | up_read(&list_rwsem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | return -ENODEV; |
| 677 | } |
Scott Murray | 43b7d7c | 2005-05-09 17:31:50 -0400 | [diff] [blame] | 678 | up_read(&list_rwsem); |
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 | status = init_slots(first); |
| 681 | if (first) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | first = 0; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 683 | if (status) |
| 684 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
| 686 | status = cpci_start_thread(); |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 687 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | return status; |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 689 | dbg("%s - thread started", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 691 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | /* Start enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 693 | dbg("%s - enabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | controller->ops->enable_irq(); |
| 695 | } |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 696 | dbg("%s - exit", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | return 0; |
| 698 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 699 | EXPORT_SYMBOL_GPL(cpci_hp_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
| 701 | int |
| 702 | cpci_hp_stop(void) |
| 703 | { |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 704 | if (!controller) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | return -ENODEV; |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 706 | if (controller->irq) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | /* Stop enum interrupt processing */ |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 708 | dbg("%s - disabling irq", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | controller->ops->disable_irq(); |
| 710 | } |
| 711 | cpci_stop_thread(); |
| 712 | return 0; |
| 713 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 714 | EXPORT_SYMBOL_GPL(cpci_hp_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | int __init |
| 717 | cpci_hotplug_init(int debug) |
| 718 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | cpci_debug = debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | return 0; |
| 721 | } |
| 722 | |
| 723 | void __exit |
| 724 | cpci_hotplug_exit(void) |
| 725 | { |
| 726 | /* |
| 727 | * Clean everything up. |
| 728 | */ |
Scott Murray | bcc488a | 2005-05-27 16:48:52 -0400 | [diff] [blame] | 729 | cpci_hp_stop(); |
| 730 | cpci_hp_unregister_controller(controller); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | } |