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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "pci.h" |
| 23 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 24 | struct pci_dynid { |
| 25 | struct list_head node; |
| 26 | struct pci_device_id id; |
| 27 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | /** |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 30 | * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices |
| 31 | * @drv: target pci driver |
| 32 | * @vendor: PCI vendor ID |
| 33 | * @device: PCI device ID |
| 34 | * @subvendor: PCI subvendor ID |
| 35 | * @subdevice: PCI subdevice ID |
| 36 | * @class: PCI class |
| 37 | * @class_mask: PCI class mask |
| 38 | * @driver_data: private driver data |
| 39 | * |
| 40 | * Adds a new dynamic pci device ID to this driver and causes the |
| 41 | * driver to probe for all devices again. @drv must have been |
| 42 | * registered prior to calling this function. |
| 43 | * |
| 44 | * CONTEXT: |
| 45 | * Does GFP_KERNEL allocation. |
| 46 | * |
| 47 | * RETURNS: |
| 48 | * 0 on success, -errno on failure. |
| 49 | */ |
| 50 | int pci_add_dynid(struct pci_driver *drv, |
| 51 | unsigned int vendor, unsigned int device, |
| 52 | unsigned int subvendor, unsigned int subdevice, |
| 53 | unsigned int class, unsigned int class_mask, |
| 54 | unsigned long driver_data) |
| 55 | { |
| 56 | struct pci_dynid *dynid; |
| 57 | int retval; |
| 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 | |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 75 | retval = driver_attach(&drv->driver); |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 76 | |
| 77 | return retval; |
| 78 | } |
| 79 | |
| 80 | static void pci_free_dynids(struct pci_driver *drv) |
| 81 | { |
| 82 | struct pci_dynid *dynid, *n; |
| 83 | |
| 84 | spin_lock(&drv->dynids.lock); |
| 85 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
| 86 | list_del(&dynid->node); |
| 87 | kfree(dynid); |
| 88 | } |
| 89 | spin_unlock(&drv->dynids.lock); |
| 90 | } |
| 91 | |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 92 | /** |
| 93 | * store_new_id - sysfs frontend to pci_add_dynid() |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 94 | * @driver: target device driver |
| 95 | * @buf: buffer for scanning device ID data |
| 96 | * @count: input size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | * |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 98 | * Allow PCI IDs to be added to an existing driver via sysfs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | */ |
Randy Dunlap | f8eb100 | 2005-10-28 20:36:51 -0700 | [diff] [blame] | 100 | static ssize_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
| 102 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | struct pci_driver *pdrv = to_pci_driver(driver); |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 104 | const struct pci_device_id *ids = pdrv->id_table; |
Jean Delvare | 6ba1863 | 2007-04-07 17:21:28 +0200 | [diff] [blame] | 105 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
| 107 | unsigned long driver_data=0; |
| 108 | int fields=0; |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 109 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 111 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | &vendor, &device, &subvendor, &subdevice, |
| 113 | &class, &class_mask, &driver_data); |
Jean Delvare | 6ba1863 | 2007-04-07 17:21:28 +0200 | [diff] [blame] | 114 | if (fields < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | return -EINVAL; |
| 116 | |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 117 | /* Only accept driver_data values that match an existing id_table |
| 118 | entry */ |
Chris Wright | 2debb4d | 2008-11-25 19:36:10 -0800 | [diff] [blame] | 119 | if (ids) { |
| 120 | retval = -EINVAL; |
| 121 | while (ids->vendor || ids->subvendor || ids->class_mask) { |
| 122 | if (driver_data == ids->driver_data) { |
| 123 | retval = 0; |
| 124 | break; |
| 125 | } |
| 126 | ids++; |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 127 | } |
Chris Wright | 2debb4d | 2008-11-25 19:36:10 -0800 | [diff] [blame] | 128 | if (retval) /* No match */ |
| 129 | return retval; |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 130 | } |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 131 | |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 132 | retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice, |
| 133 | class, class_mask, driver_data); |
Greg Kroah-Hartman | b19441a | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 134 | if (retval) |
| 135 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | return count; |
| 137 | } |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 138 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 140 | /** |
| 141 | * store_remove_id - remove a PCI device ID from this driver |
| 142 | * @driver: target device driver |
| 143 | * @buf: buffer for scanning device ID data |
| 144 | * @count: input size |
| 145 | * |
| 146 | * Removes a dynamic pci device ID to this driver. |
| 147 | */ |
| 148 | static ssize_t |
| 149 | store_remove_id(struct device_driver *driver, const char *buf, size_t count) |
| 150 | { |
| 151 | struct pci_dynid *dynid, *n; |
| 152 | struct pci_driver *pdrv = to_pci_driver(driver); |
| 153 | __u32 vendor, device, subvendor = PCI_ANY_ID, |
| 154 | subdevice = PCI_ANY_ID, class = 0, class_mask = 0; |
| 155 | int fields = 0; |
| 156 | int retval = -ENODEV; |
| 157 | |
| 158 | fields = sscanf(buf, "%x %x %x %x %x %x", |
| 159 | &vendor, &device, &subvendor, &subdevice, |
| 160 | &class, &class_mask); |
| 161 | if (fields < 2) |
| 162 | return -EINVAL; |
| 163 | |
| 164 | spin_lock(&pdrv->dynids.lock); |
| 165 | list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) { |
| 166 | struct pci_device_id *id = &dynid->id; |
| 167 | if ((id->vendor == vendor) && |
| 168 | (id->device == device) && |
| 169 | (subvendor == PCI_ANY_ID || id->subvendor == subvendor) && |
| 170 | (subdevice == PCI_ANY_ID || id->subdevice == subdevice) && |
| 171 | !((id->class ^ class) & class_mask)) { |
| 172 | list_del(&dynid->node); |
| 173 | kfree(dynid); |
| 174 | retval = 0; |
| 175 | break; |
| 176 | } |
| 177 | } |
| 178 | spin_unlock(&pdrv->dynids.lock); |
| 179 | |
| 180 | if (retval) |
| 181 | return retval; |
| 182 | return count; |
| 183 | } |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 184 | static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id); |
Chris Wright | 0994375 | 2009-02-23 21:52:23 -0800 | [diff] [blame] | 185 | |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 186 | static struct attribute *pci_drv_attrs[] = { |
| 187 | &driver_attr_new_id.attr, |
| 188 | &driver_attr_remove_id.attr, |
| 189 | NULL, |
Konstantin Khlebnikov | bfb09a8 | 2012-08-08 14:47:51 +0400 | [diff] [blame] | 190 | }; |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 191 | ATTRIBUTE_GROUPS(pci_drv); |
Alan Stern | ed283e9 | 2012-01-24 14:35:13 -0500 | [diff] [blame] | 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | /** |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 194 | * 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] | 195 | * @ids: array of PCI device id structures to search in |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 196 | * @dev: the PCI device structure to match against. |
| 197 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | * 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] | 199 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | * pci_device_id structure or %NULL if there is no match. |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 201 | * |
Randy Dunlap | 8b60756 | 2007-05-09 07:19:14 +0200 | [diff] [blame] | 202 | * 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] | 203 | * that a driver might want to check for. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 205 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
| 206 | struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 208 | if (ids) { |
| 209 | while (ids->vendor || ids->subvendor || ids->class_mask) { |
| 210 | if (pci_match_one_device(ids, dev)) |
| 211 | return ids; |
| 212 | ids++; |
| 213 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | return NULL; |
| 216 | } |
| 217 | |
| 218 | /** |
Randy Dunlap | ae9608a | 2007-01-09 21:41:01 -0800 | [diff] [blame] | 219 | * 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] | 220 | * @drv: the PCI driver to match against |
Henrik Kretzschmar | 39ba487 | 2006-08-15 10:57:16 +0200 | [diff] [blame] | 221 | * @dev: the PCI device structure to match against |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 222 | * |
| 223 | * Used by a driver to check whether a PCI device present in the |
| 224 | * system is in its list of supported devices. Returns the matching |
| 225 | * pci_device_id structure or %NULL if there is no match. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | */ |
Adrian Bunk | d73460d | 2007-10-24 18:27:18 +0200 | [diff] [blame] | 227 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
| 228 | struct pci_dev *dev) |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 229 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 230 | struct pci_dynid *dynid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 232 | /* Look at the dynamic ids first, before the static ones */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 233 | spin_lock(&drv->dynids.lock); |
| 234 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 235 | if (pci_match_one_device(&dynid->id, dev)) { |
| 236 | spin_unlock(&drv->dynids.lock); |
| 237 | return &dynid->id; |
| 238 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 240 | spin_unlock(&drv->dynids.lock); |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 241 | |
| 242 | return pci_match_id(drv->id_table, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 245 | struct drv_dev_and_id { |
| 246 | struct pci_driver *drv; |
| 247 | struct pci_dev *dev; |
| 248 | const struct pci_device_id *id; |
| 249 | }; |
| 250 | |
| 251 | static long local_pci_probe(void *_ddi) |
| 252 | { |
| 253 | struct drv_dev_and_id *ddi = _ddi; |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 254 | struct pci_dev *pci_dev = ddi->dev; |
| 255 | struct pci_driver *pci_drv = ddi->drv; |
| 256 | struct device *dev = &pci_dev->dev; |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 257 | int rc; |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 258 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 259 | /* |
| 260 | * Unbound PCI devices are always put in D0, regardless of |
| 261 | * runtime PM status. During probe, the device is set to |
| 262 | * active and the usage count is incremented. If the driver |
| 263 | * supports runtime PM, it should call pm_runtime_put_noidle() |
| 264 | * in its probe routine and pm_runtime_get_noresume() in its |
| 265 | * remove routine. |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 266 | */ |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 267 | pm_runtime_get_sync(dev); |
| 268 | pci_dev->driver = pci_drv; |
| 269 | rc = pci_drv->probe(pci_dev, ddi->id); |
Stephen M. Cameron | f92d74c | 2013-11-01 14:34:55 -0500 | [diff] [blame] | 270 | if (!rc) |
| 271 | return rc; |
| 272 | if (rc < 0) { |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 273 | pci_dev->driver = NULL; |
| 274 | pm_runtime_put_sync(dev); |
Stephen M. Cameron | f92d74c | 2013-11-01 14:34:55 -0500 | [diff] [blame] | 275 | return rc; |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 276 | } |
Stephen M. Cameron | f92d74c | 2013-11-01 14:34:55 -0500 | [diff] [blame] | 277 | /* |
| 278 | * Probe function should return < 0 for failure, 0 for success |
| 279 | * Treat values > 0 as success, but warn. |
| 280 | */ |
| 281 | dev_warn(dev, "Driver probe function unexpectedly returned %d\n", rc); |
| 282 | return 0; |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 283 | } |
| 284 | |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 285 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
| 286 | const struct pci_device_id *id) |
| 287 | { |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 288 | int error, node; |
| 289 | struct drv_dev_and_id ddi = { drv, dev, id }; |
Mike Travis | f70316d | 2008-04-04 18:11:06 -0700 | [diff] [blame] | 290 | |
Alexander Duyck | 12c3156 | 2013-11-18 10:59:59 -0700 | [diff] [blame] | 291 | /* |
| 292 | * Execute driver initialization on node where the device is |
| 293 | * attached. This way the driver likely allocates its local memory |
| 294 | * on the right node. |
| 295 | */ |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 296 | node = dev_to_node(&dev->dev); |
Alexander Duyck | 12c3156 | 2013-11-18 10:59:59 -0700 | [diff] [blame] | 297 | |
| 298 | /* |
| 299 | * On NUMA systems, we are likely to call a PF probe function using |
| 300 | * work_on_cpu(). If that probe calls pci_enable_sriov() (which |
| 301 | * adds the VF devices via pci_bus_add_device()), we may re-enter |
| 302 | * this function to call the VF probe function. Calling |
| 303 | * work_on_cpu() again will cause a lockdep warning. Since VFs are |
| 304 | * always on the same node as the PF, we can work around this by |
| 305 | * avoiding work_on_cpu() when we're already on the correct node. |
| 306 | * |
| 307 | * Preemption is enabled, so it's theoretically unsafe to use |
| 308 | * numa_node_id(), but even if we run the probe function on the |
| 309 | * wrong node, it should be functionally correct. |
| 310 | */ |
| 311 | if (node >= 0 && node != numa_node_id()) { |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 312 | int cpu; |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 313 | |
| 314 | get_online_cpus(); |
Rusty Russell | a70f730 | 2009-03-13 14:49:46 +1030 | [diff] [blame] | 315 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 316 | if (cpu < nr_cpu_ids) |
| 317 | error = work_on_cpu(cpu, local_pci_probe, &ddi); |
| 318 | else |
| 319 | error = local_pci_probe(&ddi); |
| 320 | put_online_cpus(); |
| 321 | } else |
| 322 | error = local_pci_probe(&ddi); |
Alexander Duyck | 12c3156 | 2013-11-18 10:59:59 -0700 | [diff] [blame] | 323 | |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 324 | return error; |
| 325 | } |
| 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | /** |
Randy Dunlap | 23ea379 | 2010-11-18 15:02:31 -0800 | [diff] [blame] | 328 | * __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] | 329 | * @drv: driver to call to check if it wants the PCI device |
| 330 | * @pci_dev: PCI device being probed |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 331 | * |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 332 | * returns 0 on success, else error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
| 334 | */ |
| 335 | static int |
| 336 | __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] | 337 | { |
| 338 | const struct pci_device_id *id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | int error = 0; |
| 340 | |
| 341 | if (!pci_dev->driver && drv->probe) { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 342 | error = -ENODEV; |
| 343 | |
| 344 | id = pci_match_device(drv, pci_dev); |
| 345 | if (id) |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 346 | error = pci_call_probe(drv, pci_dev, id); |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 347 | if (error >= 0) |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 348 | error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | return error; |
| 351 | } |
| 352 | |
| 353 | static int pci_device_probe(struct device * dev) |
| 354 | { |
| 355 | int error = 0; |
| 356 | struct pci_driver *drv; |
| 357 | struct pci_dev *pci_dev; |
| 358 | |
| 359 | drv = to_pci_driver(dev->driver); |
| 360 | pci_dev = to_pci_dev(dev); |
| 361 | pci_dev_get(pci_dev); |
| 362 | error = __pci_device_probe(drv, pci_dev); |
| 363 | if (error) |
| 364 | pci_dev_put(pci_dev); |
| 365 | |
| 366 | return error; |
| 367 | } |
| 368 | |
| 369 | static int pci_device_remove(struct device * dev) |
| 370 | { |
| 371 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 372 | struct pci_driver * drv = pci_dev->driver; |
| 373 | |
| 374 | if (drv) { |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 375 | if (drv->remove) { |
| 376 | pm_runtime_get_sync(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | drv->remove(pci_dev); |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 378 | pm_runtime_put_noidle(dev); |
| 379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | pci_dev->driver = NULL; |
| 381 | } |
| 382 | |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 383 | /* Undo the runtime PM settings in local_pci_probe() */ |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 384 | pm_runtime_put_sync(dev); |
Alan Stern | f3ec4f8 | 2010-06-08 15:23:51 -0400 | [diff] [blame] | 385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | /* |
Shaohua Li | 2449e06 | 2006-10-20 14:45:32 -0700 | [diff] [blame] | 387 | * If the device is still on, set the power state as "unknown", |
| 388 | * since it might change by the next time we load the driver. |
| 389 | */ |
| 390 | if (pci_dev->current_state == PCI_D0) |
| 391 | pci_dev->current_state = PCI_UNKNOWN; |
| 392 | |
| 393 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | * We would love to complain here if pci_dev->is_enabled is set, that |
| 395 | * the driver should have called pci_disable_device(), but the |
| 396 | * unfortunate fact is there are too many odd BIOS and bridge setups |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 397 | * that don't like drivers doing that all of the time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | * Oh well, we can dream of sane hardware when we sleep, no matter how |
| 399 | * horrible the crap we have to deal with is when we are awake... |
| 400 | */ |
| 401 | |
| 402 | pci_dev_put(pci_dev); |
| 403 | return 0; |
| 404 | } |
| 405 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 406 | static void pci_device_shutdown(struct device *dev) |
| 407 | { |
| 408 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 409 | struct pci_driver *drv = pci_dev->driver; |
| 410 | |
Huang Ying | 3ff2de9 | 2012-10-24 14:54:14 +0800 | [diff] [blame] | 411 | pm_runtime_resume(dev); |
| 412 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 413 | if (drv && drv->shutdown) |
| 414 | drv->shutdown(pci_dev); |
| 415 | pci_msi_shutdown(pci_dev); |
| 416 | pci_msix_shutdown(pci_dev); |
Rafael J. Wysocki | 5b415f1 | 2012-02-07 00:50:35 +0100 | [diff] [blame] | 417 | |
| 418 | /* |
Khalid Aziz | b566a22 | 2012-04-27 13:00:33 -0600 | [diff] [blame] | 419 | * Turn off Bus Master bit on the device to tell it to not |
Konstantin Khlebnikov | 6e0eda3 | 2013-03-14 18:49:37 +0400 | [diff] [blame] | 420 | * continue to do DMA. Don't touch devices in D3cold or unknown states. |
Khalid Aziz | b566a22 | 2012-04-27 13:00:33 -0600 | [diff] [blame] | 421 | */ |
Konstantin Khlebnikov | 6e0eda3 | 2013-03-14 18:49:37 +0400 | [diff] [blame] | 422 | if (pci_dev->current_state <= PCI_D3hot) |
| 423 | pci_clear_master(pci_dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 424 | } |
| 425 | |
Rafael J. Wysocki | aa33860 | 2011-02-11 00:06:54 +0100 | [diff] [blame] | 426 | #ifdef CONFIG_PM |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 427 | |
| 428 | /* Auxiliary functions used for system resume and run-time resume. */ |
| 429 | |
| 430 | /** |
| 431 | * pci_restore_standard_config - restore standard config registers of PCI device |
| 432 | * @pci_dev: PCI device to handle |
| 433 | */ |
| 434 | static int pci_restore_standard_config(struct pci_dev *pci_dev) |
| 435 | { |
| 436 | pci_update_current_state(pci_dev, PCI_UNKNOWN); |
| 437 | |
| 438 | if (pci_dev->current_state != PCI_D0) { |
| 439 | int error = pci_set_power_state(pci_dev, PCI_D0); |
| 440 | if (error) |
| 441 | return error; |
| 442 | } |
| 443 | |
Jon Mason | 1d3c16a | 2010-11-30 17:43:26 -0600 | [diff] [blame] | 444 | pci_restore_state(pci_dev); |
| 445 | return 0; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 446 | } |
| 447 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 448 | #endif |
| 449 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 450 | #ifdef CONFIG_PM_SLEEP |
| 451 | |
Rafael J. Wysocki | db288c9 | 2012-07-05 15:20:00 -0600 | [diff] [blame] | 452 | static void pci_pm_default_resume_early(struct pci_dev *pci_dev) |
| 453 | { |
| 454 | pci_power_up(pci_dev); |
| 455 | pci_restore_state(pci_dev); |
| 456 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
| 457 | } |
| 458 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 459 | /* |
| 460 | * Default "suspend" method for devices that have no driver provided suspend, |
Rafael J. Wysocki | fa58d30 | 2009-01-07 13:03:42 +0100 | [diff] [blame] | 461 | * or not even a driver at all (second part). |
| 462 | */ |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 463 | 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] | 464 | { |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 465 | /* |
| 466 | * mark its power state as "unknown", since we don't know if |
| 467 | * e.g. the BIOS will change its device state when we suspend. |
| 468 | */ |
| 469 | if (pci_dev->current_state == PCI_D0) |
| 470 | pci_dev->current_state = PCI_UNKNOWN; |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * Default "resume" method for devices that have no driver provided resume, |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 475 | * or not even a driver at all (second part). |
| 476 | */ |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 477 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 478 | { |
| 479 | int retval; |
| 480 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 481 | /* if the device was enabled before suspend, reenable */ |
| 482 | retval = pci_reenable_device(pci_dev); |
| 483 | /* |
| 484 | * if the device was busmaster before the suspend, make it busmaster |
| 485 | * again |
| 486 | */ |
| 487 | if (pci_dev->is_busmaster) |
| 488 | pci_set_master(pci_dev); |
| 489 | |
| 490 | return retval; |
| 491 | } |
| 492 | |
| 493 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | { |
| 495 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 496 | struct pci_driver * drv = pci_dev->driver; |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 497 | |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 498 | if (drv && drv->suspend) { |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 499 | pci_power_t prev = pci_dev->current_state; |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 500 | int error; |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 501 | |
Frans Pop | 57ef802 | 2009-03-16 22:39:56 +0100 | [diff] [blame] | 502 | error = drv->suspend(pci_dev, state); |
| 503 | suspend_report_result(drv->suspend, error); |
| 504 | if (error) |
| 505 | return error; |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 506 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 507 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 508 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 509 | WARN_ONCE(pci_dev->current_state != prev, |
| 510 | "PCI PM: Device state not saved by %pF\n", |
| 511 | drv->suspend); |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 512 | } |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 513 | } |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 514 | |
| 515 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 516 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 517 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | } |
| 519 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 520 | 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] | 521 | { |
| 522 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 523 | struct pci_driver * drv = pci_dev->driver; |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 524 | |
| 525 | if (drv && drv->suspend_late) { |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 526 | pci_power_t prev = pci_dev->current_state; |
| 527 | int error; |
| 528 | |
Frans Pop | 57ef802 | 2009-03-16 22:39:56 +0100 | [diff] [blame] | 529 | error = drv->suspend_late(pci_dev, state); |
| 530 | suspend_report_result(drv->suspend_late, error); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 531 | if (error) |
| 532 | return error; |
| 533 | |
| 534 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
| 535 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 536 | WARN_ONCE(pci_dev->current_state != prev, |
| 537 | "PCI PM: Device state not saved by %pF\n", |
| 538 | drv->suspend_late); |
| 539 | return 0; |
| 540 | } |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 541 | } |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 542 | |
| 543 | if (!pci_dev->state_saved) |
| 544 | pci_save_state(pci_dev); |
| 545 | |
| 546 | pci_pm_set_unknown_state(pci_dev); |
| 547 | |
| 548 | return 0; |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 549 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 551 | static int pci_legacy_resume_early(struct device *dev) |
| 552 | { |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 553 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 554 | struct pci_driver * drv = pci_dev->driver; |
| 555 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 556 | return drv && drv->resume_early ? |
| 557 | drv->resume_early(pci_dev) : 0; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 558 | } |
| 559 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 560 | static int pci_legacy_resume(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | { |
| 562 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 563 | struct pci_driver * drv = pci_dev->driver; |
| 564 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 565 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 566 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 567 | return drv && drv->resume ? |
| 568 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | } |
| 570 | |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 571 | /* Auxiliary functions used by the new power management framework */ |
| 572 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 573 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 574 | { |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 575 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 576 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 577 | if (!pci_is_bridge(pci_dev)) |
| 578 | pci_enable_wake(pci_dev, PCI_D0, false); |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 579 | } |
| 580 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 581 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 582 | { |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 583 | /* Disable non-bridge devices without PM support */ |
Rafael J. Wysocki | cbbc2f6 | 2009-02-04 02:01:15 +0100 | [diff] [blame] | 584 | if (!pci_is_bridge(pci_dev)) |
| 585 | pci_disable_enabled_device(pci_dev); |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 586 | } |
| 587 | |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 588 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
| 589 | { |
| 590 | struct pci_driver *drv = pci_dev->driver; |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 591 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 592 | || drv->resume_early); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 593 | |
| 594 | /* |
| 595 | * Legacy PM support is used by default, so warn if the new framework is |
| 596 | * supported as well. Drivers are supposed to support either the |
| 597 | * former, or the latter, but not both at the same time. |
| 598 | */ |
David Fries | 82440a8 | 2011-11-20 15:29:46 -0600 | [diff] [blame] | 599 | WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n", |
| 600 | drv->name, pci_dev->vendor, pci_dev->device); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 601 | |
| 602 | return ret; |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 603 | } |
| 604 | |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 605 | /* New power management framework */ |
| 606 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 607 | static int pci_pm_prepare(struct device *dev) |
| 608 | { |
| 609 | struct device_driver *drv = dev->driver; |
| 610 | int error = 0; |
| 611 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 612 | /* |
| 613 | * PCI devices suspended at run time need to be resumed at this |
| 614 | * point, because in general it is necessary to reconfigure them for |
| 615 | * system suspend. Namely, if the device is supposed to wake up the |
| 616 | * system from the sleep state, we may need to reconfigure it for this |
| 617 | * purpose. In turn, if the device is not supposed to wake up the |
| 618 | * system from the sleep state, we'll have to prevent it from signaling |
| 619 | * wake-up. |
| 620 | */ |
Rafael J. Wysocki | eea3fc03 | 2011-07-06 10:51:40 +0200 | [diff] [blame] | 621 | pm_runtime_resume(dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 622 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 623 | if (drv && drv->pm && drv->pm->prepare) |
| 624 | error = drv->pm->prepare(dev); |
| 625 | |
| 626 | return error; |
| 627 | } |
| 628 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 629 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 630 | #else /* !CONFIG_PM_SLEEP */ |
| 631 | |
| 632 | #define pci_pm_prepare NULL |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 633 | |
| 634 | #endif /* !CONFIG_PM_SLEEP */ |
| 635 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 636 | #ifdef CONFIG_SUSPEND |
| 637 | |
| 638 | static int pci_pm_suspend(struct device *dev) |
| 639 | { |
| 640 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 641 | 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] | 642 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 643 | if (pci_has_legacy_pm_support(pci_dev)) |
| 644 | return pci_legacy_suspend(dev, PMSG_SUSPEND); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 645 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 646 | if (!pm) { |
| 647 | pci_pm_default_suspend(pci_dev); |
| 648 | goto Fixup; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 649 | } |
Rafael J. Wysocki | fa58d30 | 2009-01-07 13:03:42 +0100 | [diff] [blame] | 650 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 651 | pci_dev->state_saved = false; |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 652 | if (pm->suspend) { |
| 653 | pci_power_t prev = pci_dev->current_state; |
| 654 | int error; |
| 655 | |
| 656 | error = pm->suspend(dev); |
| 657 | suspend_report_result(pm->suspend, error); |
| 658 | if (error) |
| 659 | return error; |
| 660 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 661 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 662 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 663 | WARN_ONCE(pci_dev->current_state != prev, |
| 664 | "PCI PM: State of device not saved by %pF\n", |
| 665 | pm->suspend); |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 666 | } |
| 667 | } |
| 668 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 669 | Fixup: |
| 670 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 671 | |
| 672 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 673 | } |
| 674 | |
| 675 | static int pci_pm_suspend_noirq(struct device *dev) |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 676 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 677 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 678 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 679 | |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 680 | if (pci_has_legacy_pm_support(pci_dev)) |
| 681 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); |
| 682 | |
Rafael J. Wysocki | 931ff68 | 2009-03-16 22:40:50 +0100 | [diff] [blame] | 683 | if (!pm) { |
| 684 | pci_save_state(pci_dev); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 685 | return 0; |
Rafael J. Wysocki | 931ff68 | 2009-03-16 22:40:50 +0100 | [diff] [blame] | 686 | } |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 687 | |
| 688 | if (pm->suspend_noirq) { |
| 689 | pci_power_t prev = pci_dev->current_state; |
| 690 | int error; |
| 691 | |
| 692 | error = pm->suspend_noirq(dev); |
| 693 | suspend_report_result(pm->suspend_noirq, error); |
| 694 | if (error) |
| 695 | return error; |
| 696 | |
| 697 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
| 698 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 699 | WARN_ONCE(pci_dev->current_state != prev, |
| 700 | "PCI PM: State of device not saved by %pF\n", |
| 701 | pm->suspend_noirq); |
| 702 | return 0; |
| 703 | } |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 704 | } |
| 705 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 706 | if (!pci_dev->state_saved) { |
| 707 | pci_save_state(pci_dev); |
| 708 | if (!pci_is_bridge(pci_dev)) |
| 709 | pci_prepare_to_sleep(pci_dev); |
| 710 | } |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 711 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 712 | pci_pm_set_unknown_state(pci_dev); |
| 713 | |
Alan Stern | dbf0e4c | 2012-07-09 11:09:21 -0400 | [diff] [blame] | 714 | /* |
| 715 | * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's |
| 716 | * PCI COMMAND register isn't 0, the BIOS assumes that the controller |
| 717 | * hasn't been quiesced and tries to turn it off. If the controller |
| 718 | * is already in D3, this can hang or cause memory corruption. |
| 719 | * |
| 720 | * Since the value of the COMMAND register doesn't matter once the |
| 721 | * device has been suspended, we can safely set it to 0 here. |
| 722 | */ |
| 723 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) |
| 724 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); |
| 725 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 726 | return 0; |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 727 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 729 | static int pci_pm_resume_noirq(struct device *dev) |
| 730 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 731 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 732 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 733 | int error = 0; |
| 734 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 735 | pci_pm_default_resume_early(pci_dev); |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 736 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 737 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 738 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 739 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 740 | if (drv && drv->pm && drv->pm->resume_noirq) |
| 741 | error = drv->pm->resume_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 742 | |
| 743 | return error; |
| 744 | } |
| 745 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 746 | static int pci_pm_resume(struct device *dev) |
| 747 | { |
| 748 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 749 | 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] | 750 | int error = 0; |
| 751 | |
Rafael J. Wysocki | 418e4da | 2009-01-26 21:43:08 +0100 | [diff] [blame] | 752 | /* |
| 753 | * This is necessary for the suspend error path in which resume is |
| 754 | * called without restoring the standard config registers of the device. |
| 755 | */ |
| 756 | if (pci_dev->state_saved) |
| 757 | pci_restore_standard_config(pci_dev); |
| 758 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 759 | if (pci_has_legacy_pm_support(pci_dev)) |
| 760 | return pci_legacy_resume(dev); |
| 761 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 762 | pci_pm_default_resume(pci_dev); |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 763 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 764 | if (pm) { |
| 765 | if (pm->resume) |
| 766 | error = pm->resume(dev); |
| 767 | } else { |
| 768 | pci_pm_reenable_device(pci_dev); |
| 769 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 770 | |
Rafael J. Wysocki | 999cce4 | 2009-09-09 23:51:27 +0200 | [diff] [blame] | 771 | return error; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 772 | } |
| 773 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 774 | #else /* !CONFIG_SUSPEND */ |
| 775 | |
| 776 | #define pci_pm_suspend NULL |
| 777 | #define pci_pm_suspend_noirq NULL |
| 778 | #define pci_pm_resume NULL |
| 779 | #define pci_pm_resume_noirq NULL |
| 780 | |
| 781 | #endif /* !CONFIG_SUSPEND */ |
| 782 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 783 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 784 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 785 | |
| 786 | /* |
| 787 | * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing |
| 788 | * a hibernate transition |
| 789 | */ |
| 790 | struct dev_pm_ops __weak pcibios_pm_ops; |
| 791 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 792 | static int pci_pm_freeze(struct device *dev) |
| 793 | { |
| 794 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 795 | 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] | 796 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 797 | if (pci_has_legacy_pm_support(pci_dev)) |
| 798 | return pci_legacy_suspend(dev, PMSG_FREEZE); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 799 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 800 | if (!pm) { |
| 801 | pci_pm_default_suspend(pci_dev); |
| 802 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 803 | } |
| 804 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 805 | pci_dev->state_saved = false; |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 806 | if (pm->freeze) { |
| 807 | int error; |
| 808 | |
| 809 | error = pm->freeze(dev); |
| 810 | suspend_report_result(pm->freeze, error); |
| 811 | if (error) |
| 812 | return error; |
| 813 | } |
| 814 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 815 | if (pcibios_pm_ops.freeze) |
| 816 | return pcibios_pm_ops.freeze(dev); |
| 817 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 818 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 819 | } |
| 820 | |
| 821 | static int pci_pm_freeze_noirq(struct device *dev) |
| 822 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 823 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 824 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 825 | |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 826 | if (pci_has_legacy_pm_support(pci_dev)) |
| 827 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); |
| 828 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 829 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 830 | int error; |
| 831 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 832 | error = drv->pm->freeze_noirq(dev); |
| 833 | suspend_report_result(drv->pm->freeze_noirq, error); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 834 | if (error) |
| 835 | return error; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 836 | } |
| 837 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 838 | if (!pci_dev->state_saved) |
| 839 | pci_save_state(pci_dev); |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 840 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 841 | pci_pm_set_unknown_state(pci_dev); |
| 842 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 843 | if (pcibios_pm_ops.freeze_noirq) |
| 844 | return pcibios_pm_ops.freeze_noirq(dev); |
| 845 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 846 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 847 | } |
| 848 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 849 | static int pci_pm_thaw_noirq(struct device *dev) |
| 850 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 851 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 852 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 853 | int error = 0; |
| 854 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 855 | if (pcibios_pm_ops.thaw_noirq) { |
| 856 | error = pcibios_pm_ops.thaw_noirq(dev); |
| 857 | if (error) |
| 858 | return error; |
| 859 | } |
| 860 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 861 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 862 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 863 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 864 | pci_update_current_state(pci_dev, PCI_D0); |
| 865 | |
| 866 | if (drv && drv->pm && drv->pm->thaw_noirq) |
| 867 | error = drv->pm->thaw_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 868 | |
| 869 | return error; |
| 870 | } |
| 871 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 872 | static int pci_pm_thaw(struct device *dev) |
| 873 | { |
| 874 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 875 | 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] | 876 | int error = 0; |
| 877 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 878 | if (pcibios_pm_ops.thaw) { |
| 879 | error = pcibios_pm_ops.thaw(dev); |
| 880 | if (error) |
| 881 | return error; |
| 882 | } |
| 883 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 884 | if (pci_has_legacy_pm_support(pci_dev)) |
| 885 | return pci_legacy_resume(dev); |
| 886 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 887 | if (pm) { |
| 888 | if (pm->thaw) |
| 889 | error = pm->thaw(dev); |
| 890 | } else { |
| 891 | pci_pm_reenable_device(pci_dev); |
| 892 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 893 | |
Rafael J. Wysocki | 4b77b0a | 2009-09-09 23:49:59 +0200 | [diff] [blame] | 894 | pci_dev->state_saved = false; |
| 895 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 896 | return error; |
| 897 | } |
| 898 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 899 | static int pci_pm_poweroff(struct device *dev) |
| 900 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 901 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 902 | 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] | 903 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 904 | if (pci_has_legacy_pm_support(pci_dev)) |
| 905 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 906 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 907 | if (!pm) { |
| 908 | pci_pm_default_suspend(pci_dev); |
| 909 | goto Fixup; |
| 910 | } |
| 911 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 912 | pci_dev->state_saved = false; |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 913 | if (pm->poweroff) { |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 914 | int error; |
| 915 | |
Rafael J. Wysocki | ddb7c9d | 2009-02-04 01:56:14 +0100 | [diff] [blame] | 916 | error = pm->poweroff(dev); |
| 917 | suspend_report_result(pm->poweroff, error); |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 918 | if (error) |
| 919 | return error; |
| 920 | } |
| 921 | |
| 922 | Fixup: |
| 923 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 924 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 925 | if (pcibios_pm_ops.poweroff) |
| 926 | return pcibios_pm_ops.poweroff(dev); |
| 927 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | static int pci_pm_poweroff_noirq(struct device *dev) |
| 932 | { |
| 933 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 934 | struct device_driver *drv = dev->driver; |
| 935 | |
| 936 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
| 937 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); |
| 938 | |
| 939 | if (!drv || !drv->pm) |
| 940 | return 0; |
| 941 | |
| 942 | if (drv->pm->poweroff_noirq) { |
| 943 | int error; |
| 944 | |
| 945 | error = drv->pm->poweroff_noirq(dev); |
| 946 | suspend_report_result(drv->pm->poweroff_noirq, error); |
| 947 | if (error) |
| 948 | return error; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 949 | } |
| 950 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 951 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
| 952 | pci_prepare_to_sleep(pci_dev); |
| 953 | |
Rafael J. Wysocki | 0b68c8e | 2012-08-12 23:26:07 +0200 | [diff] [blame] | 954 | /* |
| 955 | * The reason for doing this here is the same as for the analogous code |
| 956 | * in pci_pm_suspend_noirq(). |
| 957 | */ |
| 958 | if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI) |
| 959 | pci_write_config_word(pci_dev, PCI_COMMAND, 0); |
| 960 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 961 | if (pcibios_pm_ops.poweroff_noirq) |
| 962 | return pcibios_pm_ops.poweroff_noirq(dev); |
| 963 | |
Rafael J. Wysocki | 46939f8 | 2009-03-16 22:40:26 +0100 | [diff] [blame] | 964 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 965 | } |
| 966 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 967 | static int pci_pm_restore_noirq(struct device *dev) |
| 968 | { |
| 969 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 970 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 971 | int error = 0; |
| 972 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 973 | if (pcibios_pm_ops.restore_noirq) { |
| 974 | error = pcibios_pm_ops.restore_noirq(dev); |
| 975 | if (error) |
| 976 | return error; |
| 977 | } |
| 978 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 979 | pci_pm_default_resume_early(pci_dev); |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 980 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 981 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 982 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 983 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 984 | if (drv && drv->pm && drv->pm->restore_noirq) |
| 985 | error = drv->pm->restore_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 986 | |
| 987 | return error; |
| 988 | } |
| 989 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 990 | static int pci_pm_restore(struct device *dev) |
| 991 | { |
| 992 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Dmitry Torokhov | 8150f32 | 2009-07-24 22:11:32 -0700 | [diff] [blame] | 993 | 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] | 994 | int error = 0; |
| 995 | |
Sebastian Ott | 699c198 | 2013-08-20 16:41:02 +0200 | [diff] [blame] | 996 | if (pcibios_pm_ops.restore) { |
| 997 | error = pcibios_pm_ops.restore(dev); |
| 998 | if (error) |
| 999 | return error; |
| 1000 | } |
| 1001 | |
Rafael J. Wysocki | 418e4da | 2009-01-26 21:43:08 +0100 | [diff] [blame] | 1002 | /* |
| 1003 | * This is necessary for the hibernation error path in which restore is |
| 1004 | * called without restoring the standard config registers of the device. |
| 1005 | */ |
| 1006 | if (pci_dev->state_saved) |
| 1007 | pci_restore_standard_config(pci_dev); |
| 1008 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1009 | if (pci_has_legacy_pm_support(pci_dev)) |
| 1010 | return pci_legacy_resume(dev); |
| 1011 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 1012 | pci_pm_default_resume(pci_dev); |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1013 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 1014 | if (pm) { |
| 1015 | if (pm->restore) |
| 1016 | error = pm->restore(dev); |
| 1017 | } else { |
| 1018 | pci_pm_reenable_device(pci_dev); |
| 1019 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 1020 | |
| 1021 | return error; |
| 1022 | } |
| 1023 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 1024 | #else /* !CONFIG_HIBERNATE_CALLBACKS */ |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1025 | |
| 1026 | #define pci_pm_freeze NULL |
| 1027 | #define pci_pm_freeze_noirq NULL |
| 1028 | #define pci_pm_thaw NULL |
| 1029 | #define pci_pm_thaw_noirq NULL |
| 1030 | #define pci_pm_poweroff NULL |
| 1031 | #define pci_pm_poweroff_noirq NULL |
| 1032 | #define pci_pm_restore NULL |
| 1033 | #define pci_pm_restore_noirq NULL |
| 1034 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 1035 | #endif /* !CONFIG_HIBERNATE_CALLBACKS */ |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1036 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1037 | #ifdef CONFIG_PM_RUNTIME |
| 1038 | |
| 1039 | static int pci_pm_runtime_suspend(struct device *dev) |
| 1040 | { |
| 1041 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 1042 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
| 1043 | pci_power_t prev = pci_dev->current_state; |
| 1044 | int error; |
| 1045 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1046 | /* |
| 1047 | * If pci_dev->driver is not set (unbound), the device should |
| 1048 | * always remain in D0 regardless of the runtime PM status |
| 1049 | */ |
| 1050 | if (!pci_dev->driver) |
| 1051 | return 0; |
| 1052 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1053 | if (!pm || !pm->runtime_suspend) |
| 1054 | return -ENOSYS; |
| 1055 | |
Rafael J. Wysocki | 82fee4d | 2013-02-04 15:56:05 +0400 | [diff] [blame] | 1056 | pci_dev->state_saved = false; |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1057 | pci_dev->no_d3cold = false; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1058 | error = pm->runtime_suspend(dev); |
| 1059 | suspend_report_result(pm->runtime_suspend, error); |
| 1060 | if (error) |
| 1061 | return error; |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1062 | if (!pci_dev->d3cold_allowed) |
| 1063 | pci_dev->no_d3cold = true; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1064 | |
| 1065 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 1066 | |
| 1067 | if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0 |
| 1068 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 1069 | WARN_ONCE(pci_dev->current_state != prev, |
| 1070 | "PCI PM: State of device not saved by %pF\n", |
| 1071 | pm->runtime_suspend); |
| 1072 | return 0; |
| 1073 | } |
| 1074 | |
Dave Airlie | 42eca23 | 2012-10-29 17:26:54 -0600 | [diff] [blame] | 1075 | if (!pci_dev->state_saved) { |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1076 | pci_save_state(pci_dev); |
Dave Airlie | 42eca23 | 2012-10-29 17:26:54 -0600 | [diff] [blame] | 1077 | pci_finish_runtime_suspend(pci_dev); |
| 1078 | } |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1079 | |
| 1080 | return 0; |
| 1081 | } |
| 1082 | |
| 1083 | static int pci_pm_runtime_resume(struct device *dev) |
| 1084 | { |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1085 | int rc; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1086 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 1087 | const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
| 1088 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1089 | /* |
| 1090 | * If pci_dev->driver is not set (unbound), the device should |
| 1091 | * always remain in D0 regardless of the runtime PM status |
| 1092 | */ |
| 1093 | if (!pci_dev->driver) |
| 1094 | return 0; |
| 1095 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1096 | if (!pm || !pm->runtime_resume) |
| 1097 | return -ENOSYS; |
| 1098 | |
Rafael J. Wysocki | db288c9 | 2012-07-05 15:20:00 -0600 | [diff] [blame] | 1099 | pci_restore_standard_config(pci_dev); |
| 1100 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1101 | __pci_enable_wake(pci_dev, PCI_D0, true, false); |
| 1102 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 1103 | |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 1104 | rc = pm->runtime_resume(dev); |
| 1105 | |
| 1106 | pci_dev->runtime_d3cold = false; |
| 1107 | |
| 1108 | return rc; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1109 | } |
| 1110 | |
| 1111 | static int pci_pm_runtime_idle(struct device *dev) |
| 1112 | { |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1113 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1114 | 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] | 1115 | int ret = 0; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1116 | |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1117 | /* |
| 1118 | * If pci_dev->driver is not set (unbound), the device should |
| 1119 | * always remain in D0 regardless of the runtime PM status |
| 1120 | */ |
| 1121 | if (!pci_dev->driver) |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 1122 | return 0; |
Huang Ying | 967577b | 2012-11-20 16:08:22 +0800 | [diff] [blame] | 1123 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1124 | if (!pm) |
| 1125 | return -ENOSYS; |
| 1126 | |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 1127 | if (pm->runtime_idle) |
| 1128 | ret = pm->runtime_idle(dev); |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1129 | |
Rafael J. Wysocki | 45f0a85 | 2013-06-03 21:49:52 +0200 | [diff] [blame] | 1130 | return ret; |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1131 | } |
| 1132 | |
| 1133 | #else /* !CONFIG_PM_RUNTIME */ |
| 1134 | |
| 1135 | #define pci_pm_runtime_suspend NULL |
| 1136 | #define pci_pm_runtime_resume NULL |
| 1137 | #define pci_pm_runtime_idle NULL |
| 1138 | |
| 1139 | #endif /* !CONFIG_PM_RUNTIME */ |
| 1140 | |
Rafael J. Wysocki | aa33860 | 2011-02-11 00:06:54 +0100 | [diff] [blame] | 1141 | #ifdef CONFIG_PM |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1142 | |
Sachin Kamat | f91da04 | 2013-10-04 12:04:44 -0600 | [diff] [blame] | 1143 | static const struct dev_pm_ops pci_dev_pm_ops = { |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 1144 | .prepare = pci_pm_prepare, |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 1145 | .suspend = pci_pm_suspend, |
| 1146 | .resume = pci_pm_resume, |
| 1147 | .freeze = pci_pm_freeze, |
| 1148 | .thaw = pci_pm_thaw, |
| 1149 | .poweroff = pci_pm_poweroff, |
| 1150 | .restore = pci_pm_restore, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1151 | .suspend_noirq = pci_pm_suspend_noirq, |
| 1152 | .resume_noirq = pci_pm_resume_noirq, |
| 1153 | .freeze_noirq = pci_pm_freeze_noirq, |
| 1154 | .thaw_noirq = pci_pm_thaw_noirq, |
| 1155 | .poweroff_noirq = pci_pm_poweroff_noirq, |
| 1156 | .restore_noirq = pci_pm_restore_noirq, |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1157 | .runtime_suspend = pci_pm_runtime_suspend, |
| 1158 | .runtime_resume = pci_pm_runtime_resume, |
| 1159 | .runtime_idle = pci_pm_runtime_idle, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1160 | }; |
| 1161 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 1162 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1163 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1164 | #else /* !COMFIG_PM_OPS */ |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1165 | |
| 1166 | #define PCI_PM_OPS_PTR NULL |
| 1167 | |
Rafael J. Wysocki | 6cbf821 | 2010-02-17 23:44:58 +0100 | [diff] [blame] | 1168 | #endif /* !COMFIG_PM_OPS */ |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | /** |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 1171 | * __pci_register_driver - register a new pci driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | * @drv: the driver structure to register |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 1173 | * @owner: owner module of drv |
Randy Dunlap | f95d882 | 2007-02-10 14:41:56 -0800 | [diff] [blame] | 1174 | * @mod_name: module name string |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1175 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | * Adds the driver structure to the list of registered drivers. |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1177 | * Returns a negative value on error, otherwise 0. |
| 1178 | * If no error occurred, the driver remains registered even if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | * no device was claimed during registration. |
| 1180 | */ |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 1181 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
| 1182 | const char *mod_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | /* initialize common driver fields */ |
| 1185 | drv->driver.name = drv->name; |
| 1186 | drv->driver.bus = &pci_bus_type; |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 1187 | drv->driver.owner = owner; |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 1188 | drv->driver.mod_name = mod_name; |
Alan Cox | 50b0075 | 2006-08-16 17:42:18 +0100 | [diff] [blame] | 1189 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1190 | spin_lock_init(&drv->dynids.lock); |
| 1191 | INIT_LIST_HEAD(&drv->dynids.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | |
| 1193 | /* register with core */ |
Konstantin Khlebnikov | bfb09a8 | 2012-08-08 14:47:51 +0400 | [diff] [blame] | 1194 | return driver_register(&drv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | } |
| 1196 | |
| 1197 | /** |
| 1198 | * pci_unregister_driver - unregister a pci driver |
| 1199 | * @drv: the driver structure to unregister |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1200 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | * Deletes the driver structure from the list of registered PCI drivers, |
| 1202 | * gives it a chance to clean up by calling its remove() function for |
| 1203 | * each device it was responsible for, and marks those devices as |
| 1204 | * driverless. |
| 1205 | */ |
| 1206 | |
| 1207 | void |
| 1208 | pci_unregister_driver(struct pci_driver *drv) |
| 1209 | { |
| 1210 | driver_unregister(&drv->driver); |
| 1211 | pci_free_dynids(drv); |
| 1212 | } |
| 1213 | |
| 1214 | static struct pci_driver pci_compat_driver = { |
| 1215 | .name = "compat" |
| 1216 | }; |
| 1217 | |
| 1218 | /** |
| 1219 | * pci_dev_driver - get the pci_driver of a device |
| 1220 | * @dev: the device to query |
| 1221 | * |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1222 | * Returns the appropriate pci_driver structure or %NULL if there is no |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | * registered driver for the device. |
| 1224 | */ |
| 1225 | struct pci_driver * |
| 1226 | pci_dev_driver(const struct pci_dev *dev) |
| 1227 | { |
| 1228 | if (dev->driver) |
| 1229 | return dev->driver; |
| 1230 | else { |
| 1231 | int i; |
| 1232 | for(i=0; i<=PCI_ROM_RESOURCE; i++) |
| 1233 | if (dev->resource[i].flags & IORESOURCE_BUSY) |
| 1234 | return &pci_compat_driver; |
| 1235 | } |
| 1236 | return NULL; |
| 1237 | } |
| 1238 | |
| 1239 | /** |
| 1240 | * 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] | 1241 | * @dev: the PCI device structure to match against |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 1242 | * @drv: the device driver to search for matching PCI device id structures |
Bjorn Helgaas | f762598 | 2013-11-14 11:28:18 -0700 | [diff] [blame] | 1243 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | * 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] | 1245 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | * pci_device_id structure or %NULL if there is no match. |
| 1247 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1248 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1250 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Yinghai Lu | 58d9a38 | 2013-01-21 13:20:51 -0800 | [diff] [blame] | 1251 | struct pci_driver *pci_drv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | const struct pci_device_id *found_id; |
| 1253 | |
Yinghai Lu | 58d9a38 | 2013-01-21 13:20:51 -0800 | [diff] [blame] | 1254 | if (!pci_dev->match_driver) |
| 1255 | return 0; |
| 1256 | |
| 1257 | pci_drv = to_pci_driver(drv); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1258 | found_id = pci_match_device(pci_drv, pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | if (found_id) |
| 1260 | return 1; |
| 1261 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1262 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | } |
| 1264 | |
| 1265 | /** |
| 1266 | * pci_dev_get - increments the reference count of the pci device structure |
| 1267 | * @dev: the device being referenced |
| 1268 | * |
| 1269 | * Each live reference to a device should be refcounted. |
| 1270 | * |
| 1271 | * Drivers for PCI devices should normally record such references in |
| 1272 | * their probe() methods, when they bind to a device, and release |
| 1273 | * them by calling pci_dev_put(), in their disconnect() methods. |
| 1274 | * |
| 1275 | * A pointer to the device with the incremented reference counter is returned. |
| 1276 | */ |
| 1277 | struct pci_dev *pci_dev_get(struct pci_dev *dev) |
| 1278 | { |
| 1279 | if (dev) |
| 1280 | get_device(&dev->dev); |
| 1281 | return dev; |
| 1282 | } |
| 1283 | |
| 1284 | /** |
| 1285 | * pci_dev_put - release a use of the pci device structure |
| 1286 | * @dev: device that's been disconnected |
| 1287 | * |
| 1288 | * Must be called when a user of a device is finished with it. When the last |
| 1289 | * user of the device calls this function, the memory of the device is freed. |
| 1290 | */ |
| 1291 | void pci_dev_put(struct pci_dev *dev) |
| 1292 | { |
| 1293 | if (dev) |
| 1294 | put_device(&dev->dev); |
| 1295 | } |
| 1296 | |
Bill Pemberton | 8ccc9aa | 2012-11-21 15:34:58 -0500 | [diff] [blame] | 1297 | static int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 1298 | { |
| 1299 | struct pci_dev *pdev; |
| 1300 | |
| 1301 | if (!dev) |
| 1302 | return -ENODEV; |
| 1303 | |
| 1304 | pdev = to_pci_dev(dev); |
| 1305 | if (!pdev) |
| 1306 | return -ENODEV; |
| 1307 | |
| 1308 | if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class)) |
| 1309 | return -ENOMEM; |
| 1310 | |
| 1311 | if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device)) |
| 1312 | return -ENOMEM; |
| 1313 | |
| 1314 | if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor, |
| 1315 | pdev->subsystem_device)) |
| 1316 | return -ENOMEM; |
| 1317 | |
| 1318 | if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev))) |
| 1319 | return -ENOMEM; |
| 1320 | |
| 1321 | if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x", |
| 1322 | pdev->vendor, pdev->device, |
| 1323 | pdev->subsystem_vendor, pdev->subsystem_device, |
| 1324 | (u8)(pdev->class >> 16), (u8)(pdev->class >> 8), |
| 1325 | (u8)(pdev->class))) |
| 1326 | return -ENOMEM; |
| 1327 | return 0; |
| 1328 | } |
| 1329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | struct bus_type pci_bus_type = { |
| 1331 | .name = "pci", |
| 1332 | .match = pci_bus_match, |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 1333 | .uevent = pci_uevent, |
Russell King | b15d686 | 2006-01-05 14:30:22 +0000 | [diff] [blame] | 1334 | .probe = pci_device_probe, |
| 1335 | .remove = pci_device_remove, |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 1336 | .shutdown = pci_device_shutdown, |
Greg Kroah-Hartman | 5136b2d | 2013-10-06 23:55:40 -0700 | [diff] [blame] | 1337 | .dev_groups = pci_dev_groups, |
Greg Kroah-Hartman | 0f49ba5 | 2013-10-07 14:51:02 -0600 | [diff] [blame] | 1338 | .bus_groups = pci_bus_groups, |
Greg Kroah-Hartman | 2229c1f | 2013-10-07 14:51:20 -0600 | [diff] [blame] | 1339 | .drv_groups = pci_drv_groups, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 1340 | .pm = PCI_PM_OPS_PTR, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | }; |
| 1342 | |
| 1343 | static int __init pci_driver_init(void) |
| 1344 | { |
| 1345 | return bus_register(&pci_bus_type); |
| 1346 | } |
| 1347 | |
| 1348 | postcore_initcall(pci_driver_init); |
| 1349 | |
Tejun Heo | 9dba910 | 2009-09-03 15:26:36 +0900 | [diff] [blame] | 1350 | EXPORT_SYMBOL_GPL(pci_add_dynid); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 1351 | EXPORT_SYMBOL(pci_match_id); |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 1352 | EXPORT_SYMBOL(__pci_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | EXPORT_SYMBOL(pci_unregister_driver); |
| 1354 | EXPORT_SYMBOL(pci_dev_driver); |
| 1355 | EXPORT_SYMBOL(pci_bus_type); |
| 1356 | EXPORT_SYMBOL(pci_dev_get); |
| 1357 | EXPORT_SYMBOL(pci_dev_put); |