Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/pci/pci-driver.c |
| 3 | * |
Greg Kroah-Hartman | 2b93730 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 4 | * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com> |
| 5 | * (C) Copyright 2007 Novell Inc. |
| 6 | * |
| 7 | * Released under the GPL v2 only. |
| 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <linux/pci.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/device.h> |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 15 | #include <linux/mempolicy.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 16 | #include <linux/string.h> |
| 17 | #include <linux/slab.h> |
Tim Schmielau | 8c65b4a | 2005-11-07 00:59:43 -0800 | [diff] [blame] | 18 | #include <linux/sched.h> |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 19 | #include <linux/cpu.h> |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 20 | #include <linux/pm_runtime.h> |
Rafael J. Wysocki | eea3fc03 | 2011-07-06 10:51:40 +0200 | [diff] [blame] | 21 | #include <linux/suspend.h> |
Khalid Aziz | 4fc9bbf | 2013-11-27 15:19:25 -0700 | [diff] [blame] | 22 | #include <linux/kexec.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "pci.h" |
| 24 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 25 | struct pci_dynid { |
| 26 | struct list_head node; |
| 27 | struct pci_device_id id; |
| 28 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | /** |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 31 | * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices |
| 32 | * @drv: target pci driver |
| 33 | * @vendor: PCI vendor ID |
| 34 | * @device: PCI device ID |
| 35 | * @subvendor: PCI subvendor ID |
| 36 | * @subdevice: PCI subdevice ID |
| 37 | * @class: PCI class |
| 38 | * @class_mask: PCI class mask |
| 39 | * @driver_data: private driver data |
| 40 | * |
| 41 | * Adds a new dynamic pci device ID to this driver and causes the |
| 42 | * driver to probe for all devices again. @drv must have been |
| 43 | * registered prior to calling this function. |
| 44 | * |
| 45 | * CONTEXT: |
| 46 | * Does GFP_KERNEL allocation. |
| 47 | * |
| 48 | * RETURNS: |
| 49 | * 0 on success, -errno on failure. |
| 50 | */ |
| 51 | int pci_add_dynid(struct pci_driver *drv, |
| 52 | unsigned int vendor, unsigned int device, |
| 53 | unsigned int subvendor, unsigned int subdevice, |
| 54 | unsigned int class, unsigned int class_mask, |
| 55 | unsigned long driver_data) |
| 56 | { |
| 57 | struct pci_dynid *dynid; |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 58 | |
| 59 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); |
| 60 | if (!dynid) |
| 61 | return -ENOMEM; |
| 62 | |
| 63 | dynid->id.vendor = vendor; |
| 64 | dynid->id.device = device; |
| 65 | dynid->id.subvendor = subvendor; |
| 66 | dynid->id.subdevice = subdevice; |
| 67 | dynid->id.class = class; |
| 68 | dynid->id.class_mask = class_mask; |
| 69 | dynid->id.driver_data = driver_data; |
| 70 | |
| 71 | spin_lock(&drv->dynids.lock); |
| 72 | list_add_tail(&dynid->node, &drv->dynids.list); |
| 73 | spin_unlock(&drv->dynids.lock); |
| 74 | |
Tobias Klauser | 3b7f101 | 2014-07-25 10:36:14 +0200 | [diff] [blame] | 75 | return driver_attach(&drv->driver); |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 76 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 77 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 78 | |
| 79 | static void pci_free_dynids(struct pci_driver *drv) |
| 80 | { |
| 81 | struct pci_dynid *dynid, *n; |
| 82 | |
| 83 | spin_lock(&drv->dynids.lock); |
| 84 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
| 85 | list_del(&dynid->node); |
| 86 | kfree(dynid); |
| 87 | } |
| 88 | spin_unlock(&drv->dynids.lock); |
| 89 | } |
| 90 | |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 91 | /** |
| 92 | * store_new_id - sysfs frontend to pci_add_dynid() |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 93 | * @driver: target device driver |
| 94 | * @buf: buffer for scanning device ID data |
| 95 | * @count: input size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | * |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 97 | * Allow PCI IDs to be added to an existing driver via sysfs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | */ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 99 | static ssize_t store_new_id(struct device_driver *driver, const char *buf, |
| 100 | size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | struct pci_driver *pdrv = to_pci_driver(driver); |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 103 | const struct pci_device_id *ids = pdrv->id_table; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 104 | __u32 vendor, device, subvendor = PCI_ANY_ID, |
| 105 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; |
| 106 | unsigned long driver_data = 0; |
| 107 | int fields = 0; |
Bandan Das | 8895d3b | 2014-04-01 21:32:59 -0400 | [diff] [blame] | 108 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 110 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | &vendor, &device, &subvendor, &subdevice, |
| 112 | &class, &class_mask, &driver_data); |
Jean Delvare | 6ba1863 | 2007-04-07 17:21:28 +0200 | [diff] [blame] | 113 | if (fields < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | return -EINVAL; |
| 115 | |
Bandan Das | 8895d3b | 2014-04-01 21:32:59 -0400 | [diff] [blame] | 116 | if (fields != 7) { |
| 117 | struct pci_dev *pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); |
| 118 | if (!pdev) |
| 119 | return -ENOMEM; |
| 120 | |
| 121 | pdev->vendor = vendor; |
| 122 | pdev->device = device; |
| 123 | pdev->subsystem_vendor = subvendor; |
| 124 | pdev->subsystem_device = subdevice; |
| 125 | pdev->class = class; |
| 126 | |
| 127 | if (pci_match_id(pdrv->id_table, pdev)) |
| 128 | retval = -EEXIST; |
| 129 | |
| 130 | kfree(pdev); |
| 131 | |
| 132 | if (retval) |
| 133 | return retval; |
| 134 | } |
| 135 | |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 136 | /* Only accept driver_data values that match an existing id_table |
| 137 | entry */ |
Chris Wright | 2debb4d | 2008-11-25 19:36:10 -0800 | [diff] [blame] | 138 | if (ids) { |
| 139 | retval = -EINVAL; |
| 140 | while (ids->vendor || ids->subvendor || ids->class_mask) { |
| 141 | if (driver_data == ids->driver_data) { |
| 142 | retval = 0; |
| 143 | break; |
| 144 | } |
| 145 | ids++; |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 146 | } |
Chris Wright | 2debb4d | 2008-11-25 19:36:10 -0800 | [diff] [blame] | 147 | if (retval) /* No match */ |
| 148 | return retval; |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 149 | } |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 150 | |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 151 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
| 152 | class, class_mask, driver_data); |
Greg Kroah-Hartman | b19441a | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 153 | if (retval) |
| 154 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | return count; |
| 156 | } |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 157 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 159 | /** |
| 160 | * store_remove_id - remove a PCI device ID from this driver |
| 161 | * @driver: target device driver |
| 162 | * @buf: buffer for scanning device ID data |
| 163 | * @count: input size |
| 164 | * |
| 165 | * Removes a dynamic pci device ID to this driver. |
| 166 | */ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 167 | static ssize_t store_remove_id(struct device_driver *driver, const char *buf, |
| 168 | size_t count) |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 169 | { |
| 170 | struct pci_dynid *dynid, *n; |
| 171 | struct pci_driver *pdrv = to_pci_driver(driver); |
| 172 | __u32 vendor, device, subvendor = PCI_ANY_ID, |
| 173 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; |
| 174 | int fields = 0; |
Zhen Lei | 9222097f | 2015-09-10 18:40:31 +0800 | [diff] [blame] | 175 | size_t retval = -ENODEV; |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 176 | |
| 177 | fields = sscanf(buf, "%x %x %x %x %x %x", |
| 178 | &vendor, &device, &subvendor, &subdevice, |
| 179 | &class, &class_mask); |
| 180 | if (fields < 2) |
| 181 | return -EINVAL; |
| 182 | |
| 183 | spin_lock(&pdrv->dynids.lock); |
| 184 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { |
| 185 | struct pci_device_id *id = &dynid->id; |
| 186 | if ((id->vendor == vendor) && |
| 187 | (id->device == device) && |
| 188 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && |
| 189 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && |
| 190 | !((id->class ^ class) & class_mask)) { |
| 191 | list_del(&dynid->node); |
| 192 | kfree(dynid); |
Zhen Lei | 9222097f | 2015-09-10 18:40:31 +0800 | [diff] [blame] | 193 | retval = count; |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 194 | break; |
| 195 | } |
| 196 | } |
| 197 | spin_unlock(&pdrv->dynids.lock); |
| 198 | |
Zhen Lei | 9222097f | 2015-09-10 18:40:31 +0800 | [diff] [blame] | 199 | return retval; |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 200 | } |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 201 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 202 | |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 203 | static struct attribute *pci_drv_attrs[] = { |
| 204 | &driver_attr_new_id.attr, |
| 205 | &driver_attr_remove_id.attr, |
| 206 | NULL, |
Konstantin Khlebnikov | bfb09a8 | 2012-08-08 14:47:51 +0400 | [diff] [blame] | 207 | }; |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 208 | ATTRIBUTE_GROUPS(pci_drv); |
Alan Stern | ed283e9 | 2012-01-24 14:35:13 -0500 | [diff] [blame] | 209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | /** |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 211 | * pci_match_id - See if a pci device matches a given pci_id table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | * @ids: array of PCI device id structures to search in |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 213 | * @dev: the PCI device structure to match against. |
| 214 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | * Used by a driver to check whether a PCI device present in the |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 216 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | * pci_device_id structure or %NULL if there is no match. |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 218 | * |
Randy Dunlap | 8b60756 | 2007-05-09 07:19:14 +0200 | [diff] [blame] | 219 | * Deprecated, don't use this as it will not catch any dynamic ids |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 220 | * that a driver might want to check for. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 222 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
| 223 | struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 225 | if (ids) { |
| 226 | while (ids->vendor || ids->subvendor || ids->class_mask) { |
| 227 | if (pci_match_one_device(ids, dev)) |
| 228 | return ids; |
| 229 | ids++; |
| 230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | return NULL; |
| 233 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 234 | EXPORT_SYMBOL(pci_match_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Alex Williamson | 782a985 | 2014-05-20 08:53:21 -0600 | [diff] [blame] | 236 | static const struct pci_device_id pci_device_id_any = { |
| 237 | .vendor = PCI_ANY_ID, |
| 238 | .device = PCI_ANY_ID, |
| 239 | .subvendor = PCI_ANY_ID, |
| 240 | .subdevice = PCI_ANY_ID, |
| 241 | }; |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | /** |
Randy Dunlap | ae9608a | 2007-01-09 21:41:01 -0800 | [diff] [blame] | 244 | * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 245 | * @drv: the PCI driver to match against |
Henrik Kretzschmar | 39ba487 | 2006-08-15 10:57:16 +0200 | [diff] [blame] | 246 | * @dev: the PCI device structure to match against |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 247 | * |
| 248 | * Used by a driver to check whether a PCI device present in the |
| 249 | * system is in its list of supported devices. Returns the matching |
| 250 | * pci_device_id structure or %NULL if there is no match. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | */ |
Adrian Bunk | d73460d | 2007-10-24 18:27:18 +0200 | [diff] [blame] | 252 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
| 253 | struct pci_dev *dev) |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 254 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 255 | struct pci_dynid *dynid; |
Alex Williamson | 782a985 | 2014-05-20 08:53:21 -0600 | [diff] [blame] | 256 | const struct pci_device_id *found_id = NULL; |
| 257 | |
| 258 | /* When driver_override is set, only bind to the matching driver */ |
| 259 | if (dev->driver_override && strcmp(dev->driver_override, drv->name)) |
| 260 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 262 | /* Look at the dynamic ids first, before the static ones */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 263 | spin_lock(&drv->dynids.lock); |
| 264 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 265 | if (pci_match_one_device(&dynid->id, dev)) { |
Alex Williamson | 782a985 | 2014-05-20 08:53:21 -0600 | [diff] [blame] | 266 | found_id = &dynid->id; |
| 267 | break; |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 268 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | } |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 270 | spin_unlock(&drv->dynids.lock); |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 271 | |
Alex Williamson | 782a985 | 2014-05-20 08:53:21 -0600 | [diff] [blame] | 272 | if (!found_id) |
| 273 | found_id = pci_match_id(drv->id_table, dev); |
| 274 | |
| 275 | /* driver_override will always match, send a dummy id */ |
| 276 | if (!found_id && dev->driver_override) |
| 277 | found_id = &pci_device_id_any; |
| 278 | |
| 279 | return found_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 282 | struct drv_dev_and_id { |
| 283 | struct pci_driver *drv; |
| 284 | struct pci_dev *dev; |
| 285 | const struct pci_device_id *id; |
| 286 | }; |
| 287 | |
| 288 | static long local_pci_probe(void *_ddi) |
| 289 | { |
| 290 | struct drv_dev_and_id *ddi = _ddi; |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 291 | struct pci_dev *pci_dev = ddi->dev; |
| 292 | struct pci_driver *pci_drv = ddi->drv; |
| 293 | struct device *dev = &pci_dev->dev; |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 294 | int rc; |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 295 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 296 | /* |
| 297 | * Unbound PCI devices are always put in D0, regardless of |
| 298 | * runtime PM status. During probe, the device is set to |
| 299 | * active and the usage count is incremented. If the driver |
Rafael J. Wysocki | a836006 | 2015-09-18 03:08:40 +0200 | [diff] [blame] | 300 | * supports runtime PM, it should call pm_runtime_put_noidle(), |
| 301 | * or any other runtime PM helper function decrementing the usage |
| 302 | * count, in its probe routine and pm_runtime_get_noresume() in |
| 303 | * its remove routine. |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 304 | */ |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 305 | pm_runtime_get_sync(dev); |
| 306 | pci_dev->driver = pci_drv; |
| 307 | rc = pci_drv->probe(pci_dev, ddi->id); |
Stephen M. Cameron | f92d74c | 2013-11-01 14:34:55 -0500 | [diff] [blame] | 308 | if (!rc) |
| 309 | return rc; |
| 310 | if (rc < 0) { |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 311 | pci_dev->driver = NULL; |
| 312 | pm_runtime_put_sync(dev); |
Stephen M. Cameron | f92d74c | 2013-11-01 14:34:55 -0500 | [diff] [blame] | 313 | return rc; |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 314 | } |
Stephen M. Cameron | f92d74c | 2013-11-01 14:34:55 -0500 | [diff] [blame] | 315 | /* |
| 316 | * Probe function should return < 0 for failure, 0 for success |
| 317 | * Treat values > 0 as success, but warn. |
| 318 | */ |
| 319 | dev_warn(dev, "Driver probe function unexpectedly returned %d\n", rc); |
| 320 | return 0; |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 321 | } |
| 322 | |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 323 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
| 324 | const struct pci_device_id *id) |
| 325 | { |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 326 | int error, node; |
| 327 | struct drv_dev_and_id ddi = { drv, dev, id }; |
Mike Travis | f70316d | 2008-04-04 18:11:06 -0700 | [diff] [blame] | 328 | |
Alexander Duyck | 12c3156 | 2013-11-18 10:59:59 -0700 | [diff] [blame] | 329 | /* |
| 330 | * Execute driver initialization on node where the device is |
| 331 | * attached. This way the driver likely allocates its local memory |
| 332 | * on the right node. |
| 333 | */ |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 334 | node = dev_to_node(&dev->dev); |
Alexander Duyck | 12c3156 | 2013-11-18 10:59:59 -0700 | [diff] [blame] | 335 | |
| 336 | /* |
| 337 | * On NUMA systems, we are likely to call a PF probe function using |
| 338 | * work_on_cpu(). If that probe calls pci_enable_sriov() (which |
| 339 | * adds the VF devices via pci_bus_add_device()), we may re-enter |
| 340 | * this function to call the VF probe function. Calling |
| 341 | * work_on_cpu() again will cause a lockdep warning. Since VFs are |
| 342 | * always on the same node as the PF, we can work around this by |
| 343 | * avoiding work_on_cpu() when we're already on the correct node. |
| 344 | * |
| 345 | * Preemption is enabled, so it's theoretically unsafe to use |
| 346 | * numa_node_id(), but even if we run the probe function on the |
| 347 | * wrong node, it should be functionally correct. |
| 348 | */ |
| 349 | if (node >= 0 && node != numa_node_id()) { |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 350 | int cpu; |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 351 | |
| 352 | get_online_cpus(); |
Rusty Russell | a70f730 | 2009-03-13 14:49:46 +1030 | [diff] [blame] | 353 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 354 | if (cpu < nr_cpu_ids) |
| 355 | error = work_on_cpu(cpu, local_pci_probe, &ddi); |
| 356 | else |
| 357 | error = local_pci_probe(&ddi); |
| 358 | put_online_cpus(); |
| 359 | } else |
| 360 | error = local_pci_probe(&ddi); |
Alexander Duyck | 12c3156 | 2013-11-18 10:59:59 -0700 | [diff] [blame] | 361 | |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 362 | return error; |
| 363 | } |
| 364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | /** |
Randy Dunlap | 23ea379 | 2010-11-18 15:02:31 -0800 | [diff] [blame] | 366 | * __pci_device_probe - check if a driver wants to claim a specific PCI device |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 367 | * @drv: driver to call to check if it wants the PCI device |
| 368 | * @pci_dev: PCI device being probed |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 369 | * |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 370 | * returns 0 on success, else error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
| 372 | */ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 373 | static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev) |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 374 | { |
| 375 | const struct pci_device_id *id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | int error = 0; |
| 377 | |
| 378 | if (!pci_dev->driver && drv->probe) { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 379 | error = -ENODEV; |
| 380 | |
| 381 | id = pci_match_device(drv, pci_dev); |
| 382 | if (id) |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 383 | error = pci_call_probe(drv, pci_dev, id); |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 384 | if (error >= 0) |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 385 | error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | return error; |
| 388 | } |
| 389 | |
Jiang Liu | 890e484 | 2015-06-10 16:54:58 +0800 | [diff] [blame] | 390 | int __weak pcibios_alloc_irq(struct pci_dev *dev) |
| 391 | { |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | void __weak pcibios_free_irq(struct pci_dev *dev) |
| 396 | { |
| 397 | } |
| 398 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 399 | static int pci_device_probe(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
Jiang Liu | 890e484 | 2015-06-10 16:54:58 +0800 | [diff] [blame] | 401 | int error; |
| 402 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 403 | struct pci_driver *drv = to_pci_driver(dev->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
Jiang Liu | 890e484 | 2015-06-10 16:54:58 +0800 | [diff] [blame] | 405 | error = pcibios_alloc_irq(pci_dev); |
| 406 | if (error < 0) |
| 407 | return error; |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | pci_dev_get(pci_dev); |
| 410 | error = __pci_device_probe(drv, pci_dev); |
Jiang Liu | 890e484 | 2015-06-10 16:54:58 +0800 | [diff] [blame] | 411 | if (error) { |
| 412 | pcibios_free_irq(pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | pci_dev_put(pci_dev); |
Jiang Liu | 890e484 | 2015-06-10 16:54:58 +0800 | [diff] [blame] | 414 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
| 416 | return error; |
| 417 | } |
| 418 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 419 | static int pci_device_remove(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 421 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 422 | struct pci_driver *drv = pci_dev->driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
| 424 | if (drv) { |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 425 | if (drv->remove) { |
| 426 | pm_runtime_get_sync(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | drv->remove(pci_dev); |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 428 | pm_runtime_put_noidle(dev); |
| 429 | } |
Jiang Liu | 890e484 | 2015-06-10 16:54:58 +0800 | [diff] [blame] | 430 | pcibios_free_irq(pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | pci_dev->driver = NULL; |
| 432 | } |
| 433 | |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 434 | /* Undo the runtime PM settings in local_pci_probe() */ |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 435 | pm_runtime_put_sync(dev); |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | /* |
Shaohua Li | 2449e06 | 2006-10-20 14:45:32 -0700 | [diff] [blame] | 438 | * If the device is still on, set the power state as "unknown", |
| 439 | * since it might change by the next time we load the driver. |
| 440 | */ |
| 441 | if (pci_dev->current_state == PCI_D0) |
| 442 | pci_dev->current_state = PCI_UNKNOWN; |
| 443 | |
| 444 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | * We would love to complain here if pci_dev->is_enabled is set, that |
| 446 | * the driver should have called pci_disable_device(), but the |
| 447 | * unfortunate fact is there are too many odd BIOS and bridge setups |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 448 | * that don't like drivers doing that all of the time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | * Oh well, we can dream of sane hardware when we sleep, no matter how |
| 450 | * horrible the crap we have to deal with is when we are awake... |
| 451 | */ |
| 452 | |
| 453 | pci_dev_put(pci_dev); |
| 454 | return 0; |
| 455 | } |
| 456 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 457 | static void pci_device_shutdown(struct device *dev) |
| 458 | { |
| 459 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 460 | struct pci_driver *drv = pci_dev->driver; |
| 461 | |
Huang Ying | 3ff2de9 | 2012-10-24 14:54:14 +0800 | [diff] [blame] | 462 | pm_runtime_resume(dev); |
| 463 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 464 | if (drv && drv->shutdown) |
| 465 | drv->shutdown(pci_dev); |
| 466 | pci_msi_shutdown(pci_dev); |
| 467 | pci_msix_shutdown(pci_dev); |
Rafael J. Wysocki | 5b415f1 | 2012-02-07 00:50:35 +0100 | [diff] [blame] | 468 | |
Dave Young | 2965faa | 2015-09-09 15:38:55 -0700 | [diff] [blame] | 469 | #ifdef CONFIG_KEXEC_CORE |
Rafael J. Wysocki | 5b415f1 | 2012-02-07 00:50:35 +0100 | [diff] [blame] | 470 | /* |
Khalid Aziz | 4fc9bbf | 2013-11-27 15:19:25 -0700 | [diff] [blame] | 471 | * If this is a kexec reboot, turn off Bus Master bit on the |
| 472 | * device to tell it to not continue to do DMA. Don't touch |
| 473 | * devices in D3cold or unknown states. |
| 474 | * If it is not a kexec reboot, firmware will hit the PCI |
| 475 | * devices with big hammer and stop their DMA any way. |
Khalid Aziz | b566a22 | 2012-04-27 13:00:33 -0600 | [diff] [blame] | 476 | */ |
Khalid Aziz | 4fc9bbf | 2013-11-27 15:19:25 -0700 | [diff] [blame] | 477 | if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot)) |
Konstantin Khlebnikov | 6e0eda3 | 2013-03-14 18:49:37 +0400 | [diff] [blame] | 478 | pci_clear_master(pci_dev); |
Khalid Aziz | 4fc9bbf | 2013-11-27 15:19:25 -0700 | [diff] [blame] | 479 | #endif |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 480 | } |
| 481 | |
Rafael J. Wysocki | aa33860 | 2011-02-11 00:06:54 +0100 | [diff] [blame] | 482 | #ifdef CONFIG_PM |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 483 | |
| 484 | /* Auxiliary functions used for system resume and run-time resume. */ |
| 485 | |
| 486 | /** |
| 487 | * pci_restore_standard_config - restore standard config registers of PCI device |
| 488 | * @pci_dev: PCI device to handle |
| 489 | */ |
| 490 | static int pci_restore_standard_config(struct pci_dev *pci_dev) |
| 491 | { |
| 492 | pci_update_current_state(pci_dev, PCI_UNKNOWN); |
| 493 | |
| 494 | if (pci_dev->current_state != PCI_D0) { |
| 495 | int error = pci_set_power_state(pci_dev, PCI_D0); |
| 496 | if (error) |
| 497 | return error; |
| 498 | } |
| 499 | |
Jon Mason | 1d3c16a | 2010-11-30 17:43:26 -0600 | [diff] [blame] | 500 | pci_restore_state(pci_dev); |
| 501 | return 0; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 502 | } |
| 503 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 504 | #endif |
| 505 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 506 | #ifdef CONFIG_PM_SLEEP |
| 507 | |
Rafael J. Wysocki | db288c9 | 2012-07-05 15:20:00 -0600 | [diff] [blame] | 508 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) |
| 509 | { |
| 510 | pci_power_up(pci_dev); |
| 511 | pci_restore_state(pci_dev); |
| 512 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
| 513 | } |
| 514 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 515 | /* |
| 516 | * Default "suspend" method for devices that have no driver provided suspend, |
Rafael J. Wysocki | fa58d30 | 2009-01-07 13:03:42 +0100 | [diff] [blame] | 517 | * or not even a driver at all (second part). |
| 518 | */ |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 519 | static void pci_pm_set_unknown_state(struct pci_dev *pci_dev) |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 520 | { |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 521 | /* |
| 522 | * mark its power state as "unknown", since we don't know if |
| 523 | * e.g. the BIOS will change its device state when we suspend. |
| 524 | */ |
| 525 | if (pci_dev->current_state == PCI_D0) |
| 526 | pci_dev->current_state = PCI_UNKNOWN; |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * Default "resume" method for devices that have no driver provided resume, |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 531 | * or not even a driver at all (second part). |
| 532 | */ |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 533 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 534 | { |
| 535 | int retval; |
| 536 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 537 | /* if the device was enabled before suspend, reenable */ |
| 538 | retval = pci_reenable_device(pci_dev); |
| 539 | /* |
| 540 | * if the device was busmaster before the suspend, make it busmaster |
| 541 | * again |
| 542 | */ |
| 543 | if (pci_dev->is_busmaster) |
| 544 | pci_set_master(pci_dev); |
| 545 | |
| 546 | return retval; |
| 547 | } |
| 548 | |
| 549 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 551 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 552 | struct pci_driver *drv = pci_dev->driver; |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 553 | |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 554 | if (drv && drv->suspend) { |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 555 | pci_power_t prev = pci_dev->current_state; |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 556 | int error; |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 557 | |
Frans Pop | 57ef802 | 2009-03-16 22:39:56 +0100 | [diff] [blame] | 558 | error = drv->suspend(pci_dev, state); |
| 559 | suspend_report_result(drv->suspend, error); |
| 560 | if (error) |
| 561 | return error; |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 562 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 563 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 564 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 565 | WARN_ONCE(pci_dev->current_state != prev, |
| 566 | "PCI PM: Device state not saved by %pF\n", |
| 567 | drv->suspend); |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 568 | } |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 569 | } |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 570 | |
| 571 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 572 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 573 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 576 | static int pci_legacy_suspend_late(struct device *dev, pm_message_t state) |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 577 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 578 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 579 | struct pci_driver *drv = pci_dev->driver; |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 580 | |
| 581 | if (drv && drv->suspend_late) { |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 582 | pci_power_t prev = pci_dev->current_state; |
| 583 | int error; |
| 584 | |
Frans Pop | 57ef802 | 2009-03-16 22:39:56 +0100 | [diff] [blame] | 585 | error = drv->suspend_late(pci_dev, state); |
| 586 | suspend_report_result(drv->suspend_late, error); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 587 | if (error) |
| 588 | return error; |
| 589 | |
| 590 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
| 591 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 592 | WARN_ONCE(pci_dev->current_state != prev, |
| 593 | "PCI PM: Device state not saved by %pF\n", |
| 594 | drv->suspend_late); |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 595 | goto Fixup; |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 596 | } |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 597 | } |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 598 | |
| 599 | if (!pci_dev->state_saved) |
| 600 | pci_save_state(pci_dev); |
| 601 | |
| 602 | pci_pm_set_unknown_state(pci_dev); |
| 603 | |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 604 | Fixup: |
| 605 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); |
| 606 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 607 | return 0; |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 608 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 610 | static int pci_legacy_resume_early(struct device *dev) |
| 611 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 612 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 613 | struct pci_driver *drv = pci_dev->driver; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 614 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 615 | return drv && drv->resume_early ? |
| 616 | drv->resume_early(pci_dev) : 0; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 617 | } |
| 618 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 619 | static int pci_legacy_resume(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | { |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 621 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 622 | struct pci_driver *drv = pci_dev->driver; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 624 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 625 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 626 | return drv && drv->resume ? |
| 627 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | } |
| 629 | |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 630 | /* Auxiliary functions used by the new power management framework */ |
| 631 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 632 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 633 | { |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 634 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 635 | |
Yijing Wang | 326c1cd | 2014-05-04 12:23:36 +0800 | [diff] [blame] | 636 | if (!pci_has_subordinate(pci_dev)) |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 637 | pci_enable_wake(pci_dev, PCI_D0, false); |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 638 | } |
| 639 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 640 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 641 | { |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 642 | /* Disable non-bridge devices without PM support */ |
Yijing Wang | 326c1cd | 2014-05-04 12:23:36 +0800 | [diff] [blame] | 643 | if (!pci_has_subordinate(pci_dev)) |
Rafael J. Wysocki | cbbc2f6 | 2009-02-04 02:01:15 +0100 | [diff] [blame] | 644 | pci_disable_enabled_device(pci_dev); |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 645 | } |
| 646 | |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 647 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
| 648 | { |
| 649 | struct pci_driver *drv = pci_dev->driver; |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 650 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 651 | || drv->resume_early); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 652 | |
| 653 | /* |
| 654 | * Legacy PM support is used by default, so warn if the new framework is |
| 655 | * supported as well. Drivers are supposed to support either the |
| 656 | * former, or the latter, but not both at the same time. |
| 657 | */ |
David Fries | 82440a8 | 2011-11-20 15:29:46 -0600 | [diff] [blame] | 658 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
| 659 | drv->name, pci_dev->vendor, pci_dev->device); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 660 | |
| 661 | return ret; |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 662 | } |
| 663 | |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 664 | /* New power management framework */ |
| 665 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 666 | static int pci_pm_prepare(struct device *dev) |
| 667 | { |
| 668 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 669 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 670 | /* |
Rafael J. Wysocki | 7cd0602 | 2014-02-26 01:00:30 +0100 | [diff] [blame] | 671 | * Devices having power.ignore_children set may still be necessary for |
| 672 | * suspending their children in the next phase of device suspend. |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 673 | */ |
Rafael J. Wysocki | 7cd0602 | 2014-02-26 01:00:30 +0100 | [diff] [blame] | 674 | if (dev->power.ignore_children) |
| 675 | pm_runtime_resume(dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 676 | |
Rafael J. Wysocki | bac2a90 | 2015-01-21 02:17:42 +0100 | [diff] [blame] | 677 | if (drv && drv->pm && drv->pm->prepare) { |
| 678 | int error = drv->pm->prepare(dev); |
| 679 | if (error) |
| 680 | return error; |
| 681 | } |
| 682 | return pci_dev_keep_suspended(to_pci_dev(dev)); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 683 | } |
| 684 | |
Rafael J. Wysocki | 2cef548 | 2015-09-30 01:10:24 +0200 | [diff] [blame] | 685 | static void pci_pm_complete(struct device *dev) |
| 686 | { |
Rafael J. Wysocki | c2df86e | 2015-09-30 02:44:29 +0200 | [diff] [blame] | 687 | pci_dev_complete_resume(to_pci_dev(dev)); |
Rafael J. Wysocki | 58a1fbb | 2015-10-07 00:50:24 +0200 | [diff] [blame] | 688 | pm_complete_with_resume_check(dev); |
Rafael J. Wysocki | 2cef548 | 2015-09-30 01:10:24 +0200 | [diff] [blame] | 689 | } |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 690 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 691 | #else /* !CONFIG_PM_SLEEP */ |
| 692 | |
| 693 | #define pci_pm_prepare NULL |
Rafael J. Wysocki | 2cef548 | 2015-09-30 01:10:24 +0200 | [diff] [blame] | 694 | #define pci_pm_complete NULL |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 695 | |
| 696 | #endif /* !CONFIG_PM_SLEEP */ |
| 697 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 698 | #ifdef CONFIG_SUSPEND |
| 699 | |
| 700 | static int pci_pm_suspend(struct device *dev) |
| 701 | { |
| 702 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 703 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 704 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 705 | if (pci_has_legacy_pm_support(pci_dev)) |
| 706 | return pci_legacy_suspend(dev, PMSG_SUSPEND); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 707 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 708 | if (!pm) { |
| 709 | pci_pm_default_suspend(pci_dev); |
| 710 | goto Fixup; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 711 | } |
Rafael J. Wysocki | fa58d30 | 2009-01-07 13:03:42 +0100 | [diff] [blame] | 712 | |
Rafael J. Wysocki | 7cd0602 | 2014-02-26 01:00:30 +0100 | [diff] [blame] | 713 | /* |
| 714 | * PCI devices suspended at run time need to be resumed at this point, |
| 715 | * because in general it is necessary to reconfigure them for system |
| 716 | * suspend. Namely, if the device is supposed to wake up the system |
| 717 | * from the sleep state, we may need to reconfigure it for this purpose. |
| 718 | * In turn, if the device is not supposed to wake up the system from the |
| 719 | * sleep state, we'll have to prevent it from signaling wake-up. |
| 720 | */ |
| 721 | pm_runtime_resume(dev); |
| 722 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 723 | pci_dev->state_saved = false; |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 724 | if (pm->suspend) { |
| 725 | pci_power_t prev = pci_dev->current_state; |
| 726 | int error; |
| 727 | |
| 728 | error = pm->suspend(dev); |
| 729 | suspend_report_result(pm->suspend, error); |
| 730 | if (error) |
| 731 | return error; |
| 732 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 733 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 734 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 735 | WARN_ONCE(pci_dev->current_state != prev, |
| 736 | "PCI PM: State of device not saved by %pF\n", |
| 737 | pm->suspend); |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 738 | } |
| 739 | } |
| 740 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 741 | Fixup: |
| 742 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 743 | |
| 744 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | static int pci_pm_suspend_noirq(struct device *dev) |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 748 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 749 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 750 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 751 | |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 752 | if (pci_has_legacy_pm_support(pci_dev)) |
| 753 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); |
| 754 | |
Rafael J. Wysocki | 931ff68 | 2009-03-16 22:40:50 +0100 | [diff] [blame] | 755 | if (!pm) { |
| 756 | pci_save_state(pci_dev); |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 757 | goto Fixup; |
Rafael J. Wysocki | 931ff68 | 2009-03-16 22:40:50 +0100 | [diff] [blame] | 758 | } |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 759 | |
| 760 | if (pm->suspend_noirq) { |
| 761 | pci_power_t prev = pci_dev->current_state; |
| 762 | int error; |
| 763 | |
| 764 | error = pm->suspend_noirq(dev); |
| 765 | suspend_report_result(pm->suspend_noirq, error); |
| 766 | if (error) |
| 767 | return error; |
| 768 | |
| 769 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
| 770 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 771 | WARN_ONCE(pci_dev->current_state != prev, |
| 772 | "PCI PM: State of device not saved by %pF\n", |
| 773 | pm->suspend_noirq); |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 774 | goto Fixup; |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 775 | } |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 776 | } |
| 777 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 778 | if (!pci_dev->state_saved) { |
| 779 | pci_save_state(pci_dev); |
Yijing Wang | 326c1cd | 2014-05-04 12:23:36 +0800 | [diff] [blame] | 780 | if (!pci_has_subordinate(pci_dev)) |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 781 | pci_prepare_to_sleep(pci_dev); |
| 782 | } |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 783 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 784 | pci_pm_set_unknown_state(pci_dev); |
| 785 | |
Alan Stern | dbf0e4c | 2012-07-09 11:09:21 -0400 | [diff] [blame] | 786 | /* |
| 787 | * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's |
| 788 | * PCI COMMAND register isn't 0, the BIOS assumes that the controller |
| 789 | * hasn't been quiesced and tries to turn it off. If the controller |
| 790 | * is already in D3, this can hang or cause memory corruption. |
| 791 | * |
| 792 | * Since the value of the COMMAND register doesn't matter once the |
| 793 | * device has been suspended, we can safely set it to 0 here. |
| 794 | */ |
| 795 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) |
| 796 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); |
| 797 | |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 798 | Fixup: |
| 799 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); |
| 800 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 801 | return 0; |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 802 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 804 | static int pci_pm_resume_noirq(struct device *dev) |
| 805 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 806 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 807 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 808 | int error = 0; |
| 809 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 810 | pci_pm_default_resume_early(pci_dev); |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 811 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 812 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 813 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 814 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 815 | if (drv && drv->pm && drv->pm->resume_noirq) |
| 816 | error = drv->pm->resume_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 817 | |
| 818 | return error; |
| 819 | } |
| 820 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 821 | static int pci_pm_resume(struct device *dev) |
| 822 | { |
| 823 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 824 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 825 | int error = 0; |
| 826 | |
Rafael J. Wysocki | 418e4da | 2009-01-26 21:43:08 +0100 | [diff] [blame] | 827 | /* |
| 828 | * This is necessary for the suspend error path in which resume is |
| 829 | * called without restoring the standard config registers of the device. |
| 830 | */ |
| 831 | if (pci_dev->state_saved) |
| 832 | pci_restore_standard_config(pci_dev); |
| 833 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 834 | if (pci_has_legacy_pm_support(pci_dev)) |
| 835 | return pci_legacy_resume(dev); |
| 836 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 837 | pci_pm_default_resume(pci_dev); |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 838 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 839 | if (pm) { |
| 840 | if (pm->resume) |
| 841 | error = pm->resume(dev); |
| 842 | } else { |
| 843 | pci_pm_reenable_device(pci_dev); |
| 844 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 845 | |
Rafael J. Wysocki | 999cce4 | 2009-09-09 23:51:27 +0200 | [diff] [blame] | 846 | return error; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 847 | } |
| 848 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 849 | #else /* !CONFIG_SUSPEND */ |
| 850 | |
| 851 | #define pci_pm_suspend NULL |
| 852 | #define pci_pm_suspend_noirq NULL |
| 853 | #define pci_pm_resume NULL |
| 854 | #define pci_pm_resume_noirq NULL |
| 855 | |
| 856 | #endif /* !CONFIG_SUSPEND */ |
| 857 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 858 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 859 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 860 | |
| 861 | /* |
| 862 | * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing |
| 863 | * a hibernate transition |
| 864 | */ |
| 865 | struct dev_pm_ops __weak pcibios_pm_ops; |
| 866 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 867 | static int pci_pm_freeze(struct device *dev) |
| 868 | { |
| 869 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 870 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 871 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 872 | if (pci_has_legacy_pm_support(pci_dev)) |
| 873 | return pci_legacy_suspend(dev, PMSG_FREEZE); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 874 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 875 | if (!pm) { |
| 876 | pci_pm_default_suspend(pci_dev); |
| 877 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 878 | } |
| 879 | |
Rafael J. Wysocki | 7cd0602 | 2014-02-26 01:00:30 +0100 | [diff] [blame] | 880 | /* |
| 881 | * This used to be done in pci_pm_prepare() for all devices and some |
| 882 | * drivers may depend on it, so do it here. Ideally, runtime-suspended |
| 883 | * devices should not be touched during freeze/thaw transitions, |
| 884 | * however. |
| 885 | */ |
| 886 | pm_runtime_resume(dev); |
| 887 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 888 | pci_dev->state_saved = false; |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 889 | if (pm->freeze) { |
| 890 | int error; |
| 891 | |
| 892 | error = pm->freeze(dev); |
| 893 | suspend_report_result(pm->freeze, error); |
| 894 | if (error) |
| 895 | return error; |
| 896 | } |
| 897 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 898 | if (pcibios_pm_ops.freeze) |
| 899 | return pcibios_pm_ops.freeze(dev); |
| 900 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 901 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | static int pci_pm_freeze_noirq(struct device *dev) |
| 905 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 906 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 907 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 908 | |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 909 | if (pci_has_legacy_pm_support(pci_dev)) |
| 910 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); |
| 911 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 912 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 913 | int error; |
| 914 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 915 | error = drv->pm->freeze_noirq(dev); |
| 916 | suspend_report_result(drv->pm->freeze_noirq, error); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 917 | if (error) |
| 918 | return error; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 919 | } |
| 920 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 921 | if (!pci_dev->state_saved) |
| 922 | pci_save_state(pci_dev); |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 923 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 924 | pci_pm_set_unknown_state(pci_dev); |
| 925 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 926 | if (pcibios_pm_ops.freeze_noirq) |
| 927 | return pcibios_pm_ops.freeze_noirq(dev); |
| 928 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 929 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 930 | } |
| 931 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 932 | static int pci_pm_thaw_noirq(struct device *dev) |
| 933 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 934 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 935 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 936 | int error = 0; |
| 937 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 938 | if (pcibios_pm_ops.thaw_noirq) { |
| 939 | error = pcibios_pm_ops.thaw_noirq(dev); |
| 940 | if (error) |
| 941 | return error; |
| 942 | } |
| 943 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 944 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 945 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 946 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 947 | pci_update_current_state(pci_dev, PCI_D0); |
| 948 | |
| 949 | if (drv && drv->pm && drv->pm->thaw_noirq) |
| 950 | error = drv->pm->thaw_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 951 | |
| 952 | return error; |
| 953 | } |
| 954 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 955 | static int pci_pm_thaw(struct device *dev) |
| 956 | { |
| 957 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 958 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 959 | int error = 0; |
| 960 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 961 | if (pcibios_pm_ops.thaw) { |
| 962 | error = pcibios_pm_ops.thaw(dev); |
| 963 | if (error) |
| 964 | return error; |
| 965 | } |
| 966 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 967 | if (pci_has_legacy_pm_support(pci_dev)) |
| 968 | return pci_legacy_resume(dev); |
| 969 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 970 | if (pm) { |
| 971 | if (pm->thaw) |
| 972 | error = pm->thaw(dev); |
| 973 | } else { |
| 974 | pci_pm_reenable_device(pci_dev); |
| 975 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 976 | |
Rafael J. Wysocki | 4b77b0a | 2009-09-09 23:49:59 +0200 | [diff] [blame] | 977 | pci_dev->state_saved = false; |
| 978 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 979 | return error; |
| 980 | } |
| 981 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 982 | static int pci_pm_poweroff(struct device *dev) |
| 983 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 984 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 985 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 986 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 987 | if (pci_has_legacy_pm_support(pci_dev)) |
| 988 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 989 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 990 | if (!pm) { |
| 991 | pci_pm_default_suspend(pci_dev); |
| 992 | goto Fixup; |
| 993 | } |
| 994 | |
Rafael J. Wysocki | 7cd0602 | 2014-02-26 01:00:30 +0100 | [diff] [blame] | 995 | /* The reason to do that is the same as in pci_pm_suspend(). */ |
| 996 | pm_runtime_resume(dev); |
| 997 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 998 | pci_dev->state_saved = false; |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 999 | if (pm->poweroff) { |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 1000 | int error; |
| 1001 | |
Rafael J. Wysocki | ddb7c9d | 2009-02-04 01:56:14 +0100 | [diff] [blame] | 1002 | error = pm->poweroff(dev); |
| 1003 | suspend_report_result(pm->poweroff, error); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 1004 | if (error) |
| 1005 | return error; |
| 1006 | } |
| 1007 | |
| 1008 | Fixup: |
| 1009 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 1010 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 1011 | if (pcibios_pm_ops.poweroff) |
| 1012 | return pcibios_pm_ops.poweroff(dev); |
| 1013 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 1014 | return 0; |
| 1015 | } |
| 1016 | |
| 1017 | static int pci_pm_poweroff_noirq(struct device *dev) |
| 1018 | { |
| 1019 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 1020 | struct device_driver *drv = dev->driver; |
| 1021 | |
| 1022 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
| 1023 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); |
| 1024 | |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 1025 | if (!drv || !drv->pm) { |
| 1026 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 1027 | return 0; |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 1028 | } |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 1029 | |
| 1030 | if (drv->pm->poweroff_noirq) { |
| 1031 | int error; |
| 1032 | |
| 1033 | error = drv->pm->poweroff_noirq(dev); |
| 1034 | suspend_report_result(drv->pm->poweroff_noirq, error); |
| 1035 | if (error) |
| 1036 | return error; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1037 | } |
| 1038 | |
Yijing Wang | 326c1cd | 2014-05-04 12:23:36 +0800 | [diff] [blame] | 1039 | if (!pci_dev->state_saved && !pci_has_subordinate(pci_dev)) |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 1040 | pci_prepare_to_sleep(pci_dev); |
| 1041 | |
Rafael J. Wysocki | 0b68c8e | 2012-08-12 23:26:07 +0200 | [diff] [blame] | 1042 | /* |
| 1043 | * The reason for doing this here is the same as for the analogous code |
| 1044 | * in pci_pm_suspend_noirq(). |
| 1045 | */ |
| 1046 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) |
| 1047 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); |
| 1048 | |
Andreas Noever | 7d2a01b | 2014-06-03 22:04:09 +0200 | [diff] [blame] | 1049 | pci_fixup_device(pci_fixup_suspend_late, pci_dev); |
| 1050 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 1051 | if (pcibios_pm_ops.poweroff_noirq) |
| 1052 | return pcibios_pm_ops.poweroff_noirq(dev); |
| 1053 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 1054 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1055 | } |
| 1056 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1057 | static int pci_pm_restore_noirq(struct device *dev) |
| 1058 | { |
| 1059 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 1060 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1061 | int error = 0; |
| 1062 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 1063 | if (pcibios_pm_ops.restore_noirq) { |
| 1064 | error = pcibios_pm_ops.restore_noirq(dev); |
| 1065 | if (error) |
| 1066 | return error; |
| 1067 | } |
| 1068 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1069 | pci_pm_default_resume_early(pci_dev); |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 1070 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 1071 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 1072 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 1073 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 1074 | if (drv && drv->pm && drv->pm->restore_noirq) |
| 1075 | error = drv->pm->restore_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1076 | |
| 1077 | return error; |
| 1078 | } |
| 1079 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1080 | static int pci_pm_restore(struct device *dev) |
| 1081 | { |
| 1082 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 1083 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1084 | int error = 0; |
| 1085 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 1086 | if (pcibios_pm_ops.restore) { |
| 1087 | error = pcibios_pm_ops.restore(dev); |
| 1088 | if (error) |
| 1089 | return error; |
| 1090 | } |
| 1091 | |
Rafael J. Wysocki | 418e4da | 2009-01-26 21:43:08 +0100 | [diff] [blame] | 1092 | /* |
| 1093 | * This is necessary for the hibernation error path in which restore is |
| 1094 | * called without restoring the standard config registers of the device. |
| 1095 | */ |
| 1096 | if (pci_dev->state_saved) |
| 1097 | pci_restore_standard_config(pci_dev); |
| 1098 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1099 | if (pci_has_legacy_pm_support(pci_dev)) |
| 1100 | return pci_legacy_resume(dev); |
| 1101 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 1102 | pci_pm_default_resume(pci_dev); |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1103 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 1104 | if (pm) { |
| 1105 | if (pm->restore) |
| 1106 | error = pm->restore(dev); |
| 1107 | } else { |
| 1108 | pci_pm_reenable_device(pci_dev); |
| 1109 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1110 | |
| 1111 | return error; |
| 1112 | } |
| 1113 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 1114 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1115 | |
| 1116 | #define pci_pm_freeze NULL |
| 1117 | #define pci_pm_freeze_noirq NULL |
| 1118 | #define pci_pm_thaw NULL |
| 1119 | #define pci_pm_thaw_noirq NULL |
| 1120 | #define pci_pm_poweroff NULL |
| 1121 | #define pci_pm_poweroff_noirq NULL |
| 1122 | #define pci_pm_restore NULL |
| 1123 | #define pci_pm_restore_noirq NULL |
| 1124 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 1125 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1126 | |
Rafael J. Wysocki | fbb988b | 2014-11-27 23:16:57 +0100 | [diff] [blame] | 1127 | #ifdef CONFIG_PM |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1128 | |
| 1129 | static int pci_pm_runtime_suspend(struct device *dev) |
| 1130 | { |
| 1131 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 1132 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
| 1133 | pci_power_t prev = pci_dev->current_state; |
| 1134 | int error; |
| 1135 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1136 | /* |
| 1137 | * If pci_dev->driver is not set (unbound), the device should |
| 1138 | * always remain in D0 regardless of the runtime PM status |
| 1139 | */ |
| 1140 | if (!pci_dev->driver) |
| 1141 | return 0; |
| 1142 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1143 | if (!pm || !pm->runtime_suspend) |
| 1144 | return -ENOSYS; |
| 1145 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 1146 | pci_dev->state_saved = false; |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1147 | pci_dev->no_d3cold = false; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1148 | error = pm->runtime_suspend(dev); |
Imre Deak | 06bf403 | 2015-11-30 21:02:55 +0200 | [diff] [blame] | 1149 | if (error) { |
| 1150 | /* |
| 1151 | * -EBUSY and -EAGAIN is used to request the runtime PM core |
| 1152 | * to schedule a new suspend, so log the event only with debug |
| 1153 | * log level. |
| 1154 | */ |
| 1155 | if (error == -EBUSY || error == -EAGAIN) |
| 1156 | dev_dbg(dev, "can't suspend now (%pf returned %d)\n", |
| 1157 | pm->runtime_suspend, error); |
| 1158 | else |
| 1159 | dev_err(dev, "can't suspend (%pf returned %d)\n", |
| 1160 | pm->runtime_suspend, error); |
| 1161 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1162 | return error; |
Imre Deak | 06bf403 | 2015-11-30 21:02:55 +0200 | [diff] [blame] | 1163 | } |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1164 | if (!pci_dev->d3cold_allowed) |
| 1165 | pci_dev->no_d3cold = true; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1166 | |
| 1167 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 1168 | |
| 1169 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
| 1170 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 1171 | WARN_ONCE(pci_dev->current_state != prev, |
| 1172 | "PCI PM: State of device not saved by %pF\n", |
| 1173 | pm->runtime_suspend); |
| 1174 | return 0; |
| 1175 | } |
| 1176 | |
Dave Airlie | 42eca23 | 2012-10-29 17:26:54 -0600 | [diff] [blame] | 1177 | if (!pci_dev->state_saved) { |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1178 | pci_save_state(pci_dev); |
Dave Airlie | 42eca23 | 2012-10-29 17:26:54 -0600 | [diff] [blame] | 1179 | pci_finish_runtime_suspend(pci_dev); |
| 1180 | } |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1181 | |
| 1182 | return 0; |
| 1183 | } |
| 1184 | |
| 1185 | static int pci_pm_runtime_resume(struct device *dev) |
| 1186 | { |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1187 | int rc; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1188 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 1189 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
| 1190 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1191 | /* |
| 1192 | * If pci_dev->driver is not set (unbound), the device should |
| 1193 | * always remain in D0 regardless of the runtime PM status |
| 1194 | */ |
| 1195 | if (!pci_dev->driver) |
| 1196 | return 0; |
| 1197 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1198 | if (!pm || !pm->runtime_resume) |
| 1199 | return -ENOSYS; |
| 1200 | |
Rafael J. Wysocki | db288c9 | 2012-07-05 15:20:00 -0600 | [diff] [blame] | 1201 | pci_restore_standard_config(pci_dev); |
| 1202 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1203 | __pci_enable_wake(pci_dev, PCI_D0, true, false); |
| 1204 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 1205 | |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1206 | rc = pm->runtime_resume(dev); |
| 1207 | |
| 1208 | pci_dev->runtime_d3cold = false; |
| 1209 | |
| 1210 | return rc; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1211 | } |
| 1212 | |
| 1213 | static int pci_pm_runtime_idle(struct device *dev) |
| 1214 | { |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1215 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1216 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 1217 | int ret = 0; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1218 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1219 | /* |
| 1220 | * If pci_dev->driver is not set (unbound), the device should |
| 1221 | * always remain in D0 regardless of the runtime PM status |
| 1222 | */ |
| 1223 | if (!pci_dev->driver) |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 1224 | return 0; |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1225 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1226 | if (!pm) |
| 1227 | return -ENOSYS; |
| 1228 | |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 1229 | if (pm->runtime_idle) |
| 1230 | ret = pm->runtime_idle(dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1231 | |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 1232 | return ret; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1233 | } |
| 1234 | |
Sachin Kamat | f91da04 | 2013-10-04 12:04:44 -0600 | [diff] [blame] | 1235 | static const struct dev_pm_ops pci_dev_pm_ops = { |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 1236 | .prepare = pci_pm_prepare, |
Rafael J. Wysocki | 2cef548 | 2015-09-30 01:10:24 +0200 | [diff] [blame] | 1237 | .complete = pci_pm_complete, |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 1238 | .suspend = pci_pm_suspend, |
| 1239 | .resume = pci_pm_resume, |
| 1240 | .freeze = pci_pm_freeze, |
| 1241 | .thaw = pci_pm_thaw, |
| 1242 | .poweroff = pci_pm_poweroff, |
| 1243 | .restore = pci_pm_restore, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1244 | .suspend_noirq = pci_pm_suspend_noirq, |
| 1245 | .resume_noirq = pci_pm_resume_noirq, |
| 1246 | .freeze_noirq = pci_pm_freeze_noirq, |
| 1247 | .thaw_noirq = pci_pm_thaw_noirq, |
| 1248 | .poweroff_noirq = pci_pm_poweroff_noirq, |
| 1249 | .restore_noirq = pci_pm_restore_noirq, |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1250 | .runtime_suspend = pci_pm_runtime_suspend, |
| 1251 | .runtime_resume = pci_pm_runtime_resume, |
| 1252 | .runtime_idle = pci_pm_runtime_idle, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1253 | }; |
| 1254 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 1255 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1256 | |
Rafael J. Wysocki | fbb988b | 2014-11-27 23:16:57 +0100 | [diff] [blame] | 1257 | #else /* !CONFIG_PM */ |
| 1258 | |
| 1259 | #define pci_pm_runtime_suspend NULL |
| 1260 | #define pci_pm_runtime_resume NULL |
| 1261 | #define pci_pm_runtime_idle NULL |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1262 | |
| 1263 | #define PCI_PM_OPS_PTR NULL |
| 1264 | |
Rafael J. Wysocki | fbb988b | 2014-11-27 23:16:57 +0100 | [diff] [blame] | 1265 | #endif /* !CONFIG_PM */ |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | /** |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 1268 | * __pci_register_driver - register a new pci driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | * @drv: the driver structure to register |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 1270 | * @owner: owner module of drv |
Randy Dunlap | f95d882 | 2007-02-10 14:41:56 -0800 | [diff] [blame] | 1271 | * @mod_name: module name string |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1272 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | * Adds the driver structure to the list of registered drivers. |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1274 | * Returns a negative value on error, otherwise 0. |
| 1275 | * If no error occurred, the driver remains registered even if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | * no device was claimed during registration. |
| 1277 | */ |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 1278 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
| 1279 | const char *mod_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | /* initialize common driver fields */ |
| 1282 | drv->driver.name = drv->name; |
| 1283 | drv->driver.bus = &pci_bus_type; |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 1284 | drv->driver.owner = owner; |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 1285 | drv->driver.mod_name = mod_name; |
Alan Cox | 50b0075 | 2006-08-16 17:42:18 +0100 | [diff] [blame] | 1286 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1287 | spin_lock_init(&drv->dynids.lock); |
| 1288 | INIT_LIST_HEAD(&drv->dynids.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | |
| 1290 | /* register with core */ |
Konstantin Khlebnikov | bfb09a8 | 2012-08-08 14:47:51 +0400 | [diff] [blame] | 1291 | return driver_register(&drv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 1293 | EXPORT_SYMBOL(__pci_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | |
| 1295 | /** |
| 1296 | * pci_unregister_driver - unregister a pci driver |
| 1297 | * @drv: the driver structure to unregister |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1298 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | * Deletes the driver structure from the list of registered PCI drivers, |
| 1300 | * gives it a chance to clean up by calling its remove() function for |
| 1301 | * each device it was responsible for, and marks those devices as |
| 1302 | * driverless. |
| 1303 | */ |
| 1304 | |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 1305 | void pci_unregister_driver(struct pci_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | { |
| 1307 | driver_unregister(&drv->driver); |
| 1308 | pci_free_dynids(drv); |
| 1309 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 1310 | EXPORT_SYMBOL(pci_unregister_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | |
| 1312 | static struct pci_driver pci_compat_driver = { |
| 1313 | .name = "compat" |
| 1314 | }; |
| 1315 | |
| 1316 | /** |
| 1317 | * pci_dev_driver - get the pci_driver of a device |
| 1318 | * @dev: the device to query |
| 1319 | * |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1320 | * Returns the appropriate pci_driver structure or %NULL if there is no |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | * registered driver for the device. |
| 1322 | */ |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 1323 | struct pci_driver *pci_dev_driver(const struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | { |
| 1325 | if (dev->driver) |
| 1326 | return dev->driver; |
| 1327 | else { |
| 1328 | int i; |
Ryan Desfosses | 3c78bc6 | 2014-04-18 20:13:49 -0400 | [diff] [blame] | 1329 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | if (dev->resource[i].flags & IORESOURCE_BUSY) |
| 1331 | return &pci_compat_driver; |
| 1332 | } |
| 1333 | return NULL; |
| 1334 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 1335 | EXPORT_SYMBOL(pci_dev_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
| 1337 | /** |
| 1338 | * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | * @dev: the PCI device structure to match against |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 1340 | * @drv: the device driver to search for matching PCI device id structures |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1341 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | * Used by a driver to check whether a PCI device present in the |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 1343 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | * pci_device_id structure or %NULL if there is no match. |
| 1345 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1346 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1348 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Yinghai Lu | 58d9a38 | 2013-01-21 13:20:51 -0800 | [diff] [blame] | 1349 | struct pci_driver *pci_drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | const struct pci_device_id *found_id; |
| 1351 | |
Yinghai Lu | 58d9a38 | 2013-01-21 13:20:51 -0800 | [diff] [blame] | 1352 | if (!pci_dev->match_driver) |
| 1353 | return 0; |
| 1354 | |
| 1355 | pci_drv = to_pci_driver(drv); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1356 | found_id = pci_match_device(pci_drv, pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | if (found_id) |
| 1358 | return 1; |
| 1359 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1360 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | } |
| 1362 | |
| 1363 | /** |
| 1364 | * pci_dev_get - increments the reference count of the pci device structure |
| 1365 | * @dev: the device being referenced |
| 1366 | * |
| 1367 | * Each live reference to a device should be refcounted. |
| 1368 | * |
| 1369 | * Drivers for PCI devices should normally record such references in |
| 1370 | * their probe() methods, when they bind to a device, and release |
| 1371 | * them by calling pci_dev_put(), in their disconnect() methods. |
| 1372 | * |
| 1373 | * A pointer to the device with the incremented reference counter is returned. |
| 1374 | */ |
| 1375 | struct pci_dev *pci_dev_get(struct pci_dev *dev) |
| 1376 | { |
| 1377 | if (dev) |
| 1378 | get_device(&dev->dev); |
| 1379 | return dev; |
| 1380 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 1381 | EXPORT_SYMBOL(pci_dev_get); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | |
| 1383 | /** |
| 1384 | * pci_dev_put - release a use of the pci device structure |
| 1385 | * @dev: device that's been disconnected |
| 1386 | * |
| 1387 | * Must be called when a user of a device is finished with it. When the last |
| 1388 | * user of the device calls this function, the memory of the device is freed. |
| 1389 | */ |
| 1390 | void pci_dev_put(struct pci_dev *dev) |
| 1391 | { |
| 1392 | if (dev) |
| 1393 | put_device(&dev->dev); |
| 1394 | } |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 1395 | EXPORT_SYMBOL(pci_dev_put); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | |
Bill Pemberton | 8ccc9aa | 2012-11-21 15:34:58 -0500 | [diff] [blame] | 1397 | static int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 1398 | { |
| 1399 | struct pci_dev *pdev; |
| 1400 | |
| 1401 | if (!dev) |
| 1402 | return -ENODEV; |
| 1403 | |
| 1404 | pdev = to_pci_dev(dev); |
Bill Pemberton | 8ccc9aa | 2012-11-21 15:34:58 -0500 | [diff] [blame] | 1405 | |
| 1406 | if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class)) |
| 1407 | return -ENOMEM; |
| 1408 | |
| 1409 | if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device)) |
| 1410 | return -ENOMEM; |
| 1411 | |
| 1412 | if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, |
| 1413 | pdev->subsystem_device)) |
| 1414 | return -ENOMEM; |
| 1415 | |
| 1416 | if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev))) |
| 1417 | return -ENOMEM; |
| 1418 | |
Ricardo Ribalda Delgado | 145b3fe | 2014-12-02 17:35:04 +0100 | [diff] [blame] | 1419 | if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X", |
Bill Pemberton | 8ccc9aa | 2012-11-21 15:34:58 -0500 | [diff] [blame] | 1420 | pdev->vendor, pdev->device, |
| 1421 | pdev->subsystem_vendor, pdev->subsystem_device, |
| 1422 | (u8)(pdev->class >> 16), (u8)(pdev->class >> 8), |
| 1423 | (u8)(pdev->class))) |
| 1424 | return -ENOMEM; |
Bjorn Helgaas | efdd407 | 2014-04-05 15:08:22 -0600 | [diff] [blame] | 1425 | |
Bill Pemberton | 8ccc9aa | 2012-11-21 15:34:58 -0500 | [diff] [blame] | 1426 | return 0; |
| 1427 | } |
| 1428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | struct bus_type pci_bus_type = { |
| 1430 | .name = "pci", |
| 1431 | .match = pci_bus_match, |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 1432 | .uevent = pci_uevent, |
Russell King | b15d686 | 2006-01-05 14:30:22 +0000 | [diff] [blame] | 1433 | .probe = pci_device_probe, |
| 1434 | .remove = pci_device_remove, |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 1435 | .shutdown = pci_device_shutdown, |
Greg Kroah-Hartman | 5136b2d | 2013-10-06 23:55:40 -0700 | [diff] [blame] | 1436 | .dev_groups = pci_dev_groups, |
Greg Kroah-Hartman | 0f49ba5 | 2013-10-07 14:51:02 -0600 | [diff] [blame] | 1437 | .bus_groups = pci_bus_groups, |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 1438 | .drv_groups = pci_drv_groups, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1439 | .pm = PCI_PM_OPS_PTR, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | }; |
Ryan Desfosses | b7fe943 | 2014-04-25 14:32:25 -0600 | [diff] [blame] | 1441 | EXPORT_SYMBOL(pci_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | |
| 1443 | static int __init pci_driver_init(void) |
| 1444 | { |
| 1445 | return bus_register(&pci_bus_type); |
| 1446 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | postcore_initcall(pci_driver_init); |