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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * drivers/pci/pci-driver.c
3 *
Greg Kroah-Hartman2b937302007-11-28 12:23:18 -08004 * (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 Torvalds1da177e2005-04-16 15:20:36 -07009 */
10
11#include <linux/pci.h>
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/device.h>
Andi Kleend42c6992005-07-06 19:56:03 +020015#include <linux/mempolicy.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080016#include <linux/string.h>
17#include <linux/slab.h>
Tim Schmielau8c65b4a2005-11-07 00:59:43 -080018#include <linux/sched.h>
Rusty Russell873392c2008-12-31 23:54:56 +103019#include <linux/cpu.h>
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +010020#include <linux/pm_runtime.h>
Rafael J. Wysockieea3fc032011-07-06 10:51:40 +020021#include <linux/suspend.h>
Khalid Aziz4fc9bbf2013-11-27 15:19:25 -070022#include <linux/kexec.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "pci.h"
24
Greg Kroah-Hartman75865852005-06-30 02:18:12 -070025struct pci_dynid {
26 struct list_head node;
27 struct pci_device_id id;
28};
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30/**
Tejun Heo9dba9102009-09-03 15:26:36 +090031 * 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 */
51int 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 Heo9dba9102009-09-03 15:26:36 +090058
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 Klauser3b7f1012014-07-25 10:36:14 +020075 return driver_attach(&drv->driver);
Tejun Heo9dba9102009-09-03 15:26:36 +090076}
Ryan Desfossesb7fe9432014-04-25 14:32:25 -060077EXPORT_SYMBOL_GPL(pci_add_dynid);
Tejun Heo9dba9102009-09-03 15:26:36 +090078
79static 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 Heo9dba9102009-09-03 15:26:36 +090091/**
92 * store_new_id - sysfs frontend to pci_add_dynid()
Randy Dunlap8f7020d2005-10-23 11:57:38 -070093 * @driver: target device driver
94 * @buf: buffer for scanning device ID data
95 * @count: input size
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 *
Tejun Heo9dba9102009-09-03 15:26:36 +090097 * Allow PCI IDs to be added to an existing driver via sysfs.
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 */
Ryan Desfosses3c78bc62014-04-18 20:13:49 -040099static ssize_t store_new_id(struct device_driver *driver, const char *buf,
100 size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 struct pci_driver *pdrv = to_pci_driver(driver);
Jean Delvareb41d6cf2008-08-17 21:06:59 +0200103 const struct pci_device_id *ids = pdrv->id_table;
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400104 __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 Das8895d3b2014-04-01 21:32:59 -0400108 int retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Jean Delvareb41d6cf2008-08-17 21:06:59 +0200110 fields = sscanf(buf, "%x %x %x %x %x %x %lx",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 &vendor, &device, &subvendor, &subdevice,
112 &class, &class_mask, &driver_data);
Jean Delvare6ba18632007-04-07 17:21:28 +0200113 if (fields < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 return -EINVAL;
115
Bandan Das8895d3b2014-04-01 21:32:59 -0400116 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 Delvareb41d6cf2008-08-17 21:06:59 +0200136 /* Only accept driver_data values that match an existing id_table
137 entry */
Chris Wright2debb4d2008-11-25 19:36:10 -0800138 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 Delvareb41d6cf2008-08-17 21:06:59 +0200146 }
Chris Wright2debb4d2008-11-25 19:36:10 -0800147 if (retval) /* No match */
148 return retval;
Jean Delvareb41d6cf2008-08-17 21:06:59 +0200149 }
Jean Delvareb41d6cf2008-08-17 21:06:59 +0200150
Tejun Heo9dba9102009-09-03 15:26:36 +0900151 retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice,
152 class, class_mask, driver_data);
Greg Kroah-Hartmanb19441a2006-08-28 11:43:25 -0700153 if (retval)
154 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 return count;
156}
Greg Kroah-Hartman2229c1f2013-10-07 14:51:20 -0600157static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Chris Wright09943752009-02-23 21:52:23 -0800159/**
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 Desfosses3c78bc62014-04-18 20:13:49 -0400167static ssize_t store_remove_id(struct device_driver *driver, const char *buf,
168 size_t count)
Chris Wright09943752009-02-23 21:52:23 -0800169{
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 Lei9222097f2015-09-10 18:40:31 +0800175 size_t retval = -ENODEV;
Chris Wright09943752009-02-23 21:52:23 -0800176
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 Lei9222097f2015-09-10 18:40:31 +0800193 retval = count;
Chris Wright09943752009-02-23 21:52:23 -0800194 break;
195 }
196 }
197 spin_unlock(&pdrv->dynids.lock);
198
Zhen Lei9222097f2015-09-10 18:40:31 +0800199 return retval;
Chris Wright09943752009-02-23 21:52:23 -0800200}
Greg Kroah-Hartman2229c1f2013-10-07 14:51:20 -0600201static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
Chris Wright09943752009-02-23 21:52:23 -0800202
Greg Kroah-Hartman2229c1f2013-10-07 14:51:20 -0600203static struct attribute *pci_drv_attrs[] = {
204 &driver_attr_new_id.attr,
205 &driver_attr_remove_id.attr,
206 NULL,
Konstantin Khlebnikovbfb09a82012-08-08 14:47:51 +0400207};
Greg Kroah-Hartman2229c1f2013-10-07 14:51:20 -0600208ATTRIBUTE_GROUPS(pci_drv);
Alan Sterned283e92012-01-24 14:35:13 -0500209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210/**
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700211 * pci_match_id - See if a pci device matches a given pci_id table
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 * @ids: array of PCI device id structures to search in
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700213 * @dev: the PCI device structure to match against.
214 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 * Used by a driver to check whether a PCI device present in the
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700216 * system is in its list of supported devices. Returns the matching
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 * pci_device_id structure or %NULL if there is no match.
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700218 *
Randy Dunlap8b607562007-05-09 07:19:14 +0200219 * Deprecated, don't use this as it will not catch any dynamic ids
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700220 * that a driver might want to check for.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 */
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700222const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
223 struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700225 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 Torvalds1da177e2005-04-16 15:20:36 -0700231 }
232 return NULL;
233}
Ryan Desfossesb7fe9432014-04-25 14:32:25 -0600234EXPORT_SYMBOL(pci_match_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Alex Williamson782a9852014-05-20 08:53:21 -0600236static 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 Torvalds1da177e2005-04-16 15:20:36 -0700243/**
Randy Dunlapae9608a2007-01-09 21:41:01 -0800244 * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700245 * @drv: the PCI driver to match against
Henrik Kretzschmar39ba4872006-08-15 10:57:16 +0200246 * @dev: the PCI device structure to match against
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700247 *
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 Torvalds1da177e2005-04-16 15:20:36 -0700251 */
Adrian Bunkd73460d2007-10-24 18:27:18 +0200252static const struct pci_device_id *pci_match_device(struct pci_driver *drv,
253 struct pci_dev *dev)
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700254{
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700255 struct pci_dynid *dynid;
Alex Williamson782a9852014-05-20 08:53:21 -0600256 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 Torvalds1da177e2005-04-16 15:20:36 -0700261
Russell King7461b602006-11-29 21:18:04 +0000262 /* Look at the dynamic ids first, before the static ones */
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700263 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 Williamson782a9852014-05-20 08:53:21 -0600266 found_id = &dynid->id;
267 break;
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700268 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 }
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700270 spin_unlock(&drv->dynids.lock);
Russell King7461b602006-11-29 21:18:04 +0000271
Alex Williamson782a9852014-05-20 08:53:21 -0600272 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 Torvalds1da177e2005-04-16 15:20:36 -0700280}
281
Rusty Russell873392c2008-12-31 23:54:56 +1030282struct drv_dev_and_id {
283 struct pci_driver *drv;
284 struct pci_dev *dev;
285 const struct pci_device_id *id;
286};
287
288static long local_pci_probe(void *_ddi)
289{
290 struct drv_dev_and_id *ddi = _ddi;
Huang Ying967577b2012-11-20 16:08:22 +0800291 struct pci_dev *pci_dev = ddi->dev;
292 struct pci_driver *pci_drv = ddi->drv;
293 struct device *dev = &pci_dev->dev;
Alan Sternf3ec4f82010-06-08 15:23:51 -0400294 int rc;
Rusty Russell873392c2008-12-31 23:54:56 +1030295
Huang Ying967577b2012-11-20 16:08:22 +0800296 /*
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. Wysockia8360062015-09-18 03:08:40 +0200300 * 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 Sternf3ec4f82010-06-08 15:23:51 -0400304 */
Huang Ying967577b2012-11-20 16:08:22 +0800305 pm_runtime_get_sync(dev);
306 pci_dev->driver = pci_drv;
307 rc = pci_drv->probe(pci_dev, ddi->id);
Stephen M. Cameronf92d74c2013-11-01 14:34:55 -0500308 if (!rc)
309 return rc;
310 if (rc < 0) {
Huang Ying967577b2012-11-20 16:08:22 +0800311 pci_dev->driver = NULL;
312 pm_runtime_put_sync(dev);
Stephen M. Cameronf92d74c2013-11-01 14:34:55 -0500313 return rc;
Alan Sternf3ec4f82010-06-08 15:23:51 -0400314 }
Stephen M. Cameronf92d74c2013-11-01 14:34:55 -0500315 /*
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 Russell873392c2008-12-31 23:54:56 +1030321}
322
Andi Kleend42c6992005-07-06 19:56:03 +0200323static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
324 const struct pci_device_id *id)
325{
Rusty Russell873392c2008-12-31 23:54:56 +1030326 int error, node;
327 struct drv_dev_and_id ddi = { drv, dev, id };
Mike Travisf70316d2008-04-04 18:11:06 -0700328
Alexander Duyck12c31562013-11-18 10:59:59 -0700329 /*
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 Russell873392c2008-12-31 23:54:56 +1030334 node = dev_to_node(&dev->dev);
Alexander Duyck12c31562013-11-18 10:59:59 -0700335
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 Russell873392c2008-12-31 23:54:56 +1030350 int cpu;
Rusty Russell873392c2008-12-31 23:54:56 +1030351
352 get_online_cpus();
Rusty Russella70f7302009-03-13 14:49:46 +1030353 cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask);
Rusty Russell873392c2008-12-31 23:54:56 +1030354 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 Duyck12c31562013-11-18 10:59:59 -0700361
Andi Kleend42c6992005-07-06 19:56:03 +0200362 return error;
363}
364
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365/**
Randy Dunlap23ea3792010-11-18 15:02:31 -0800366 * __pci_device_probe - check if a driver wants to claim a specific PCI device
Randy Dunlap8f7020d2005-10-23 11:57:38 -0700367 * @drv: driver to call to check if it wants the PCI device
368 * @pci_dev: PCI device being probed
Bjorn Helgaasf7625982013-11-14 11:28:18 -0700369 *
Randy Dunlap8f7020d2005-10-23 11:57:38 -0700370 * returns 0 on success, else error.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 * side-effect: pci_dev->driver is set to drv when drv claims pci_dev.
372 */
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400373static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev)
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700374{
375 const struct pci_device_id *id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 int error = 0;
377
378 if (!pci_dev->driver && drv->probe) {
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700379 error = -ENODEV;
380
381 id = pci_match_device(drv, pci_dev);
382 if (id)
Andi Kleend42c6992005-07-06 19:56:03 +0200383 error = pci_call_probe(drv, pci_dev, id);
Huang Ying967577b2012-11-20 16:08:22 +0800384 if (error >= 0)
Greg Kroah-Hartman75865852005-06-30 02:18:12 -0700385 error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
387 return error;
388}
389
Jiang Liu890e4842015-06-10 16:54:58 +0800390int __weak pcibios_alloc_irq(struct pci_dev *dev)
391{
392 return 0;
393}
394
395void __weak pcibios_free_irq(struct pci_dev *dev)
396{
397}
398
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400399static int pci_device_probe(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
Jiang Liu890e4842015-06-10 16:54:58 +0800401 int error;
402 struct pci_dev *pci_dev = to_pci_dev(dev);
403 struct pci_driver *drv = to_pci_driver(dev->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Jiang Liu890e4842015-06-10 16:54:58 +0800405 error = pcibios_alloc_irq(pci_dev);
406 if (error < 0)
407 return error;
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 pci_dev_get(pci_dev);
410 error = __pci_device_probe(drv, pci_dev);
Jiang Liu890e4842015-06-10 16:54:58 +0800411 if (error) {
412 pcibios_free_irq(pci_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 pci_dev_put(pci_dev);
Jiang Liu890e4842015-06-10 16:54:58 +0800414 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416 return error;
417}
418
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400419static int pci_device_remove(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420{
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400421 struct pci_dev *pci_dev = to_pci_dev(dev);
422 struct pci_driver *drv = pci_dev->driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424 if (drv) {
Alan Sternf3ec4f82010-06-08 15:23:51 -0400425 if (drv->remove) {
426 pm_runtime_get_sync(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 drv->remove(pci_dev);
Alan Sternf3ec4f82010-06-08 15:23:51 -0400428 pm_runtime_put_noidle(dev);
429 }
Jiang Liu890e4842015-06-10 16:54:58 +0800430 pcibios_free_irq(pci_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 pci_dev->driver = NULL;
432 }
433
Alan Sternf3ec4f82010-06-08 15:23:51 -0400434 /* Undo the runtime PM settings in local_pci_probe() */
Huang Ying967577b2012-11-20 16:08:22 +0800435 pm_runtime_put_sync(dev);
Alan Sternf3ec4f82010-06-08 15:23:51 -0400436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 /*
Shaohua Li2449e062006-10-20 14:45:32 -0700438 * 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 Torvalds1da177e2005-04-16 15:20:36 -0700445 * 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 Helgaasf7625982013-11-14 11:28:18 -0700448 * that don't like drivers doing that all of the time.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 * 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. Wysockibbb44d92008-05-20 00:49:04 +0200457static 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 Ying3ff2de92012-10-24 14:54:14 +0800462 pm_runtime_resume(dev);
463
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200464 if (drv && drv->shutdown)
465 drv->shutdown(pci_dev);
466 pci_msi_shutdown(pci_dev);
467 pci_msix_shutdown(pci_dev);
Rafael J. Wysocki5b415f12012-02-07 00:50:35 +0100468
Dave Young2965faa2015-09-09 15:38:55 -0700469#ifdef CONFIG_KEXEC_CORE
Rafael J. Wysocki5b415f12012-02-07 00:50:35 +0100470 /*
Khalid Aziz4fc9bbf2013-11-27 15:19:25 -0700471 * 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 Azizb566a222012-04-27 13:00:33 -0600476 */
Khalid Aziz4fc9bbf2013-11-27 15:19:25 -0700477 if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot))
Konstantin Khlebnikov6e0eda32013-03-14 18:49:37 +0400478 pci_clear_master(pci_dev);
Khalid Aziz4fc9bbf2013-11-27 15:19:25 -0700479#endif
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200480}
481
Rafael J. Wysockiaa338602011-02-11 00:06:54 +0100482#ifdef CONFIG_PM
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100483
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 */
490static 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 Mason1d3c16a2010-11-30 17:43:26 -0600500 pci_restore_state(pci_dev);
501 return 0;
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100502}
503
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100504#endif
505
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200506#ifdef CONFIG_PM_SLEEP
507
Rafael J. Wysockidb288c92012-07-05 15:20:00 -0600508static 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. Wysockibbb44d92008-05-20 00:49:04 +0200515/*
516 * Default "suspend" method for devices that have no driver provided suspend,
Rafael J. Wysockifa58d302009-01-07 13:03:42 +0100517 * or not even a driver at all (second part).
518 */
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100519static void pci_pm_set_unknown_state(struct pci_dev *pci_dev)
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200520{
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200521 /*
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. Wysocki355a72d2008-12-08 00:34:57 +0100531 * or not even a driver at all (second part).
532 */
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100533static int pci_pm_reenable_device(struct pci_dev *pci_dev)
Rafael J. Wysocki355a72d2008-12-08 00:34:57 +0100534{
535 int retval;
536
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200537 /* 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
549static int pci_legacy_suspend(struct device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550{
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400551 struct pci_dev *pci_dev = to_pci_dev(dev);
552 struct pci_driver *drv = pci_dev->driver;
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100553
Andrew Morton02669492006-03-23 01:38:34 -0800554 if (drv && drv->suspend) {
Rafael J. Wysocki99dadce2009-02-04 01:59:09 +0100555 pci_power_t prev = pci_dev->current_state;
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100556 int error;
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100557
Frans Pop57ef8022009-03-16 22:39:56 +0100558 error = drv->suspend(pci_dev, state);
559 suspend_report_result(drv->suspend, error);
560 if (error)
561 return error;
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100562
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100563 if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
Rafael J. Wysocki99dadce2009-02-04 01:59:09 +0100564 && 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. Wysocki99dadce2009-02-04 01:59:09 +0100568 }
Andrew Morton02669492006-03-23 01:38:34 -0800569 }
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +0100570
571 pci_fixup_device(pci_fixup_suspend, pci_dev);
572
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100573 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574}
575
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200576static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700577{
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400578 struct pci_dev *pci_dev = to_pci_dev(dev);
579 struct pci_driver *drv = pci_dev->driver;
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700580
581 if (drv && drv->suspend_late) {
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100582 pci_power_t prev = pci_dev->current_state;
583 int error;
584
Frans Pop57ef8022009-03-16 22:39:56 +0100585 error = drv->suspend_late(pci_dev, state);
586 suspend_report_result(drv->suspend_late, error);
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100587 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 Noever7d2a01b2014-06-03 22:04:09 +0200595 goto Fixup;
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100596 }
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700597 }
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100598
599 if (!pci_dev->state_saved)
600 pci_save_state(pci_dev);
601
602 pci_pm_set_unknown_state(pci_dev);
603
Andreas Noever7d2a01b2014-06-03 22:04:09 +0200604Fixup:
605 pci_fixup_device(pci_fixup_suspend_late, pci_dev);
606
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100607 return 0;
Linus Torvaldscbd69db2006-06-24 14:50:29 -0700608}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100610static int pci_legacy_resume_early(struct device *dev)
611{
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400612 struct pci_dev *pci_dev = to_pci_dev(dev);
613 struct pci_driver *drv = pci_dev->driver;
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100614
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100615 return drv && drv->resume_early ?
616 drv->resume_early(pci_dev) : 0;
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100617}
618
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200619static int pci_legacy_resume(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
Ryan Desfosses3c78bc62014-04-18 20:13:49 -0400621 struct pci_dev *pci_dev = to_pci_dev(dev);
622 struct pci_driver *drv = pci_dev->driver;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +0100624 pci_fixup_device(pci_fixup_resume, pci_dev);
625
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100626 return drv && drv->resume ?
627 drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628}
629
Rafael J. Wysocki571ff752009-01-07 13:05:05 +0100630/* Auxiliary functions used by the new power management framework */
631
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100632static void pci_pm_default_resume(struct pci_dev *pci_dev)
Rafael J. Wysocki571ff752009-01-07 13:05:05 +0100633{
Rafael J. Wysocki734104292009-01-07 13:07:15 +0100634 pci_fixup_device(pci_fixup_resume, pci_dev);
635
Yijing Wang326c1cd2014-05-04 12:23:36 +0800636 if (!pci_has_subordinate(pci_dev))
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100637 pci_enable_wake(pci_dev, PCI_D0, false);
Rafael J. Wysocki571ff752009-01-07 13:05:05 +0100638}
639
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100640static void pci_pm_default_suspend(struct pci_dev *pci_dev)
Rafael J. Wysocki734104292009-01-07 13:07:15 +0100641{
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100642 /* Disable non-bridge devices without PM support */
Yijing Wang326c1cd2014-05-04 12:23:36 +0800643 if (!pci_has_subordinate(pci_dev))
Rafael J. Wysockicbbc2f62009-02-04 02:01:15 +0100644 pci_disable_enabled_device(pci_dev);
Rafael J. Wysocki734104292009-01-07 13:07:15 +0100645}
646
Rafael J. Wysocki07e836e2009-01-07 13:06:10 +0100647static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
648{
649 struct pci_driver *drv = pci_dev->driver;
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100650 bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume
Rafael J. Wysocki07e836e2009-01-07 13:06:10 +0100651 || drv->resume_early);
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100652
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 Fries82440a82011-11-20 15:29:46 -0600658 WARN(ret && drv->driver.pm, "driver %s device %04x:%04x\n",
659 drv->name, pci_dev->vendor, pci_dev->device);
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100660
661 return ret;
Rafael J. Wysocki07e836e2009-01-07 13:06:10 +0100662}
663
Rafael J. Wysocki571ff752009-01-07 13:05:05 +0100664/* New power management framework */
665
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200666static int pci_pm_prepare(struct device *dev)
667{
668 struct device_driver *drv = dev->driver;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200669
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100670 /*
Rafael J. Wysocki7cd06022014-02-26 01:00:30 +0100671 * Devices having power.ignore_children set may still be necessary for
672 * suspending their children in the next phase of device suspend.
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100673 */
Rafael J. Wysocki7cd06022014-02-26 01:00:30 +0100674 if (dev->power.ignore_children)
675 pm_runtime_resume(dev);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100676
Rafael J. Wysockibac2a902015-01-21 02:17:42 +0100677 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. Wysockibbb44d92008-05-20 00:49:04 +0200683}
684
Rafael J. Wysocki2cef5482015-09-30 01:10:24 +0200685static void pci_pm_complete(struct device *dev)
686{
Rafael J. Wysockic2df86e2015-09-30 02:44:29 +0200687 pci_dev_complete_resume(to_pci_dev(dev));
Rafael J. Wysocki58a1fbb2015-10-07 00:50:24 +0200688 pm_complete_with_resume_check(dev);
Rafael J. Wysocki2cef5482015-09-30 01:10:24 +0200689}
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200690
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100691#else /* !CONFIG_PM_SLEEP */
692
693#define pci_pm_prepare NULL
Rafael J. Wysocki2cef5482015-09-30 01:10:24 +0200694#define pci_pm_complete NULL
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100695
696#endif /* !CONFIG_PM_SLEEP */
697
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200698#ifdef CONFIG_SUSPEND
699
700static int pci_pm_suspend(struct device *dev)
701{
702 struct pci_dev *pci_dev = to_pci_dev(dev);
Dmitry Torokhov8150f322009-07-24 22:11:32 -0700703 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200704
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +0100705 if (pci_has_legacy_pm_support(pci_dev))
706 return pci_legacy_suspend(dev, PMSG_SUSPEND);
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100707
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100708 if (!pm) {
709 pci_pm_default_suspend(pci_dev);
710 goto Fixup;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200711 }
Rafael J. Wysockifa58d302009-01-07 13:03:42 +0100712
Rafael J. Wysocki7cd06022014-02-26 01:00:30 +0100713 /*
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. Wysocki82fee4d2013-02-04 15:56:05 +0400723 pci_dev->state_saved = false;
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100724 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. Wysocki46939f82009-03-16 22:40:26 +0100733 if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100734 && 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. Wysocki5294e252009-02-04 02:09:07 +0100738 }
739 }
740
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100741 Fixup:
742 pci_fixup_device(pci_fixup_suspend, pci_dev);
743
744 return 0;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200745}
746
747static int pci_pm_suspend_noirq(struct device *dev)
Greg KHc8958172005-04-08 14:53:31 +0900748{
Rafael J. Wysocki355a72d2008-12-08 00:34:57 +0100749 struct pci_dev *pci_dev = to_pci_dev(dev);
Dmitry Torokhov8150f322009-07-24 22:11:32 -0700750 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Greg KHc8958172005-04-08 14:53:31 +0900751
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100752 if (pci_has_legacy_pm_support(pci_dev))
753 return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
754
Rafael J. Wysocki931ff682009-03-16 22:40:50 +0100755 if (!pm) {
756 pci_save_state(pci_dev);
Andreas Noever7d2a01b2014-06-03 22:04:09 +0200757 goto Fixup;
Rafael J. Wysocki931ff682009-03-16 22:40:50 +0100758 }
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100759
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 Noever7d2a01b2014-06-03 22:04:09 +0200774 goto Fixup;
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100775 }
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200776 }
777
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100778 if (!pci_dev->state_saved) {
779 pci_save_state(pci_dev);
Yijing Wang326c1cd2014-05-04 12:23:36 +0800780 if (!pci_has_subordinate(pci_dev))
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100781 pci_prepare_to_sleep(pci_dev);
782 }
Rafael J. Wysockid67e37d2009-01-07 13:11:28 +0100783
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100784 pci_pm_set_unknown_state(pci_dev);
785
Alan Sterndbf0e4c2012-07-09 11:09:21 -0400786 /*
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 Noever7d2a01b2014-06-03 22:04:09 +0200798Fixup:
799 pci_fixup_device(pci_fixup_suspend_late, pci_dev);
800
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100801 return 0;
Greg KHc8958172005-04-08 14:53:31 +0900802}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200804static int pci_pm_resume_noirq(struct device *dev)
805{
Rafael J. Wysocki355a72d2008-12-08 00:34:57 +0100806 struct pci_dev *pci_dev = to_pci_dev(dev);
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200807 struct device_driver *drv = dev->driver;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200808 int error = 0;
809
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +0100810 pci_pm_default_resume_early(pci_dev);
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +0100811
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +0100812 if (pci_has_legacy_pm_support(pci_dev))
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100813 return pci_legacy_resume_early(dev);
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100814
Rafael J. Wysockid67e37d2009-01-07 13:11:28 +0100815 if (drv && drv->pm && drv->pm->resume_noirq)
816 error = drv->pm->resume_noirq(dev);
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200817
818 return error;
819}
820
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100821static int pci_pm_resume(struct device *dev)
822{
823 struct pci_dev *pci_dev = to_pci_dev(dev);
Dmitry Torokhov8150f322009-07-24 22:11:32 -0700824 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100825 int error = 0;
826
Rafael J. Wysocki418e4da2009-01-26 21:43:08 +0100827 /*
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. Wysockif6dc1e52009-01-07 13:12:22 +0100834 if (pci_has_legacy_pm_support(pci_dev))
835 return pci_legacy_resume(dev);
836
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100837 pci_pm_default_resume(pci_dev);
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100838
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100839 if (pm) {
840 if (pm->resume)
841 error = pm->resume(dev);
842 } else {
843 pci_pm_reenable_device(pci_dev);
844 }
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100845
Rafael J. Wysocki999cce42009-09-09 23:51:27 +0200846 return error;
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100847}
848
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200849#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. Wysocki1f112ce2011-04-11 22:54:42 +0200858#ifdef CONFIG_HIBERNATE_CALLBACKS
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200859
Sebastian Ott699c1982013-08-20 16:41:02 +0200860
861/*
862 * pcibios_pm_ops - provide arch-specific hooks when a PCI device is doing
863 * a hibernate transition
864 */
865struct dev_pm_ops __weak pcibios_pm_ops;
866
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200867static int pci_pm_freeze(struct device *dev)
868{
869 struct pci_dev *pci_dev = to_pci_dev(dev);
Dmitry Torokhov8150f322009-07-24 22:11:32 -0700870 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200871
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +0100872 if (pci_has_legacy_pm_support(pci_dev))
873 return pci_legacy_suspend(dev, PMSG_FREEZE);
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100874
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100875 if (!pm) {
876 pci_pm_default_suspend(pci_dev);
877 return 0;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200878 }
879
Rafael J. Wysocki7cd06022014-02-26 01:00:30 +0100880 /*
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. Wysocki82fee4d2013-02-04 15:56:05 +0400888 pci_dev->state_saved = false;
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100889 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 Ott699c1982013-08-20 16:41:02 +0200898 if (pcibios_pm_ops.freeze)
899 return pcibios_pm_ops.freeze(dev);
900
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100901 return 0;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200902}
903
904static int pci_pm_freeze_noirq(struct device *dev)
905{
Rafael J. Wysocki355a72d2008-12-08 00:34:57 +0100906 struct pci_dev *pci_dev = to_pci_dev(dev);
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200907 struct device_driver *drv = dev->driver;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200908
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100909 if (pci_has_legacy_pm_support(pci_dev))
910 return pci_legacy_suspend_late(dev, PMSG_FREEZE);
911
Rafael J. Wysockid67e37d2009-01-07 13:11:28 +0100912 if (drv && drv->pm && drv->pm->freeze_noirq) {
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100913 int error;
914
Rafael J. Wysockid67e37d2009-01-07 13:11:28 +0100915 error = drv->pm->freeze_noirq(dev);
916 suspend_report_result(drv->pm->freeze_noirq, error);
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100917 if (error)
918 return error;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200919 }
920
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100921 if (!pci_dev->state_saved)
922 pci_save_state(pci_dev);
Rafael J. Wysockid67e37d2009-01-07 13:11:28 +0100923
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100924 pci_pm_set_unknown_state(pci_dev);
925
Sebastian Ott699c1982013-08-20 16:41:02 +0200926 if (pcibios_pm_ops.freeze_noirq)
927 return pcibios_pm_ops.freeze_noirq(dev);
928
Rafael J. Wysocki46939f82009-03-16 22:40:26 +0100929 return 0;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200930}
931
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200932static int pci_pm_thaw_noirq(struct device *dev)
933{
Rafael J. Wysocki355a72d2008-12-08 00:34:57 +0100934 struct pci_dev *pci_dev = to_pci_dev(dev);
Rafael J. Wysockiadf09492008-10-06 22:46:05 +0200935 struct device_driver *drv = dev->driver;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200936 int error = 0;
937
Sebastian Ott699c1982013-08-20 16:41:02 +0200938 if (pcibios_pm_ops.thaw_noirq) {
939 error = pcibios_pm_ops.thaw_noirq(dev);
940 if (error)
941 return error;
942 }
943
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +0100944 if (pci_has_legacy_pm_support(pci_dev))
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100945 return pci_legacy_resume_early(dev);
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100946
Rafael J. Wysockid67e37d2009-01-07 13:11:28 +0100947 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. Wysockibbb44d92008-05-20 00:49:04 +0200951
952 return error;
953}
954
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100955static int pci_pm_thaw(struct device *dev)
956{
957 struct pci_dev *pci_dev = to_pci_dev(dev);
Dmitry Torokhov8150f322009-07-24 22:11:32 -0700958 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100959 int error = 0;
960
Sebastian Ott699c1982013-08-20 16:41:02 +0200961 if (pcibios_pm_ops.thaw) {
962 error = pcibios_pm_ops.thaw(dev);
963 if (error)
964 return error;
965 }
966
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100967 if (pci_has_legacy_pm_support(pci_dev))
968 return pci_legacy_resume(dev);
969
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100970 if (pm) {
971 if (pm->thaw)
972 error = pm->thaw(dev);
973 } else {
974 pci_pm_reenable_device(pci_dev);
975 }
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100976
Rafael J. Wysocki4b77b0a2009-09-09 23:49:59 +0200977 pci_dev->state_saved = false;
978
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +0100979 return error;
980}
981
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200982static int pci_pm_poweroff(struct device *dev)
983{
Rafael J. Wysocki355a72d2008-12-08 00:34:57 +0100984 struct pci_dev *pci_dev = to_pci_dev(dev);
Dmitry Torokhov8150f322009-07-24 22:11:32 -0700985 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +0200986
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +0100987 if (pci_has_legacy_pm_support(pci_dev))
988 return pci_legacy_suspend(dev, PMSG_HIBERNATE);
Rafael J. Wysockibb808942009-01-07 14:15:17 +0100989
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100990 if (!pm) {
991 pci_pm_default_suspend(pci_dev);
992 goto Fixup;
993 }
994
Rafael J. Wysocki7cd06022014-02-26 01:00:30 +0100995 /* The reason to do that is the same as in pci_pm_suspend(). */
996 pm_runtime_resume(dev);
997
Rafael J. Wysocki82fee4d2013-02-04 15:56:05 +0400998 pci_dev->state_saved = false;
Rafael J. Wysocki5294e252009-02-04 02:09:07 +0100999 if (pm->poweroff) {
Rafael J. Wysocki46939f82009-03-16 22:40:26 +01001000 int error;
1001
Rafael J. Wysockiddb7c9d2009-02-04 01:56:14 +01001002 error = pm->poweroff(dev);
1003 suspend_report_result(pm->poweroff, error);
Rafael J. Wysocki46939f82009-03-16 22:40:26 +01001004 if (error)
1005 return error;
1006 }
1007
1008 Fixup:
1009 pci_fixup_device(pci_fixup_suspend, pci_dev);
1010
Sebastian Ott699c1982013-08-20 16:41:02 +02001011 if (pcibios_pm_ops.poweroff)
1012 return pcibios_pm_ops.poweroff(dev);
1013
Rafael J. Wysocki46939f82009-03-16 22:40:26 +01001014 return 0;
1015}
1016
1017static 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 Noever7d2a01b2014-06-03 22:04:09 +02001025 if (!drv || !drv->pm) {
1026 pci_fixup_device(pci_fixup_suspend_late, pci_dev);
Rafael J. Wysocki46939f82009-03-16 22:40:26 +01001027 return 0;
Andreas Noever7d2a01b2014-06-03 22:04:09 +02001028 }
Rafael J. Wysocki46939f82009-03-16 22:40:26 +01001029
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. Wysockibbb44d92008-05-20 00:49:04 +02001037 }
1038
Yijing Wang326c1cd2014-05-04 12:23:36 +08001039 if (!pci_dev->state_saved && !pci_has_subordinate(pci_dev))
Rafael J. Wysocki5294e252009-02-04 02:09:07 +01001040 pci_prepare_to_sleep(pci_dev);
1041
Rafael J. Wysocki0b68c8e2012-08-12 23:26:07 +02001042 /*
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 Noever7d2a01b2014-06-03 22:04:09 +02001049 pci_fixup_device(pci_fixup_suspend_late, pci_dev);
1050
Sebastian Ott699c1982013-08-20 16:41:02 +02001051 if (pcibios_pm_ops.poweroff_noirq)
1052 return pcibios_pm_ops.poweroff_noirq(dev);
1053
Rafael J. Wysocki46939f82009-03-16 22:40:26 +01001054 return 0;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001055}
1056
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001057static int pci_pm_restore_noirq(struct device *dev)
1058{
1059 struct pci_dev *pci_dev = to_pci_dev(dev);
Rafael J. Wysockiadf09492008-10-06 22:46:05 +02001060 struct device_driver *drv = dev->driver;
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001061 int error = 0;
1062
Sebastian Ott699c1982013-08-20 16:41:02 +02001063 if (pcibios_pm_ops.restore_noirq) {
1064 error = pcibios_pm_ops.restore_noirq(dev);
1065 if (error)
1066 return error;
1067 }
1068
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001069 pci_pm_default_resume_early(pci_dev);
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +01001070
Rafael J. Wysockiad8cfa12009-01-07 13:09:37 +01001071 if (pci_has_legacy_pm_support(pci_dev))
Rafael J. Wysockibb808942009-01-07 14:15:17 +01001072 return pci_legacy_resume_early(dev);
Rafael J. Wysockibb808942009-01-07 14:15:17 +01001073
Rafael J. Wysockid67e37d2009-01-07 13:11:28 +01001074 if (drv && drv->pm && drv->pm->restore_noirq)
1075 error = drv->pm->restore_noirq(dev);
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001076
1077 return error;
1078}
1079
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +01001080static int pci_pm_restore(struct device *dev)
1081{
1082 struct pci_dev *pci_dev = to_pci_dev(dev);
Dmitry Torokhov8150f322009-07-24 22:11:32 -07001083 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +01001084 int error = 0;
1085
Sebastian Ott699c1982013-08-20 16:41:02 +02001086 if (pcibios_pm_ops.restore) {
1087 error = pcibios_pm_ops.restore(dev);
1088 if (error)
1089 return error;
1090 }
1091
Rafael J. Wysocki418e4da2009-01-26 21:43:08 +01001092 /*
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. Wysockif6dc1e52009-01-07 13:12:22 +01001099 if (pci_has_legacy_pm_support(pci_dev))
1100 return pci_legacy_resume(dev);
1101
Rafael J. Wysocki5294e252009-02-04 02:09:07 +01001102 pci_pm_default_resume(pci_dev);
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +01001103
Rafael J. Wysocki5294e252009-02-04 02:09:07 +01001104 if (pm) {
1105 if (pm->restore)
1106 error = pm->restore(dev);
1107 } else {
1108 pci_pm_reenable_device(pci_dev);
1109 }
Rafael J. Wysockif6dc1e52009-01-07 13:12:22 +01001110
1111 return error;
1112}
1113
Rafael J. Wysocki1f112ce2011-04-11 22:54:42 +02001114#else /* !CONFIG_HIBERNATE_CALLBACKS */
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001115
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. Wysocki1f112ce2011-04-11 22:54:42 +02001125#endif /* !CONFIG_HIBERNATE_CALLBACKS */
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001126
Rafael J. Wysockifbb988b2014-11-27 23:16:57 +01001127#ifdef CONFIG_PM
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001128
1129static 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 Ying967577b2012-11-20 16:08:22 +08001136 /*
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. Wysocki6cbf8212010-02-17 23:44:58 +01001143 if (!pm || !pm->runtime_suspend)
1144 return -ENOSYS;
1145
Rafael J. Wysocki82fee4d2013-02-04 15:56:05 +04001146 pci_dev->state_saved = false;
Huang Ying448bd852012-06-23 10:23:51 +08001147 pci_dev->no_d3cold = false;
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001148 error = pm->runtime_suspend(dev);
Imre Deak06bf4032015-11-30 21:02:55 +02001149 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. Wysocki6cbf8212010-02-17 23:44:58 +01001162 return error;
Imre Deak06bf4032015-11-30 21:02:55 +02001163 }
Huang Ying448bd852012-06-23 10:23:51 +08001164 if (!pci_dev->d3cold_allowed)
1165 pci_dev->no_d3cold = true;
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001166
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 Airlie42eca232012-10-29 17:26:54 -06001177 if (!pci_dev->state_saved) {
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001178 pci_save_state(pci_dev);
Dave Airlie42eca232012-10-29 17:26:54 -06001179 pci_finish_runtime_suspend(pci_dev);
1180 }
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001181
1182 return 0;
1183}
1184
1185static int pci_pm_runtime_resume(struct device *dev)
1186{
Huang Ying448bd852012-06-23 10:23:51 +08001187 int rc;
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001188 struct pci_dev *pci_dev = to_pci_dev(dev);
1189 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
1190
Huang Ying967577b2012-11-20 16:08:22 +08001191 /*
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. Wysocki6cbf8212010-02-17 23:44:58 +01001198 if (!pm || !pm->runtime_resume)
1199 return -ENOSYS;
1200
Rafael J. Wysockidb288c92012-07-05 15:20:00 -06001201 pci_restore_standard_config(pci_dev);
1202 pci_fixup_device(pci_fixup_resume_early, pci_dev);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001203 __pci_enable_wake(pci_dev, PCI_D0, true, false);
1204 pci_fixup_device(pci_fixup_resume, pci_dev);
1205
Huang Ying448bd852012-06-23 10:23:51 +08001206 rc = pm->runtime_resume(dev);
1207
1208 pci_dev->runtime_d3cold = false;
1209
1210 return rc;
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001211}
1212
1213static int pci_pm_runtime_idle(struct device *dev)
1214{
Huang Ying967577b2012-11-20 16:08:22 +08001215 struct pci_dev *pci_dev = to_pci_dev(dev);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001216 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
Rafael J. Wysocki45f0a852013-06-03 21:49:52 +02001217 int ret = 0;
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001218
Huang Ying967577b2012-11-20 16:08:22 +08001219 /*
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. Wysocki45f0a852013-06-03 21:49:52 +02001224 return 0;
Huang Ying967577b2012-11-20 16:08:22 +08001225
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001226 if (!pm)
1227 return -ENOSYS;
1228
Rafael J. Wysocki45f0a852013-06-03 21:49:52 +02001229 if (pm->runtime_idle)
1230 ret = pm->runtime_idle(dev);
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001231
Rafael J. Wysocki45f0a852013-06-03 21:49:52 +02001232 return ret;
Rafael J. Wysocki6cbf8212010-02-17 23:44:58 +01001233}
1234
Sachin Kamatf91da042013-10-04 12:04:44 -06001235static const struct dev_pm_ops pci_dev_pm_ops = {
Rafael J. Wysockiadf09492008-10-06 22:46:05 +02001236 .prepare = pci_pm_prepare,
Rafael J. Wysocki2cef5482015-09-30 01:10:24 +02001237 .complete = pci_pm_complete,
Rafael J. Wysockiadf09492008-10-06 22:46:05 +02001238 .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. Wysockibbb44d92008-05-20 00:49:04 +02001244 .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. Wysocki6cbf8212010-02-17 23:44:58 +01001250 .runtime_suspend = pci_pm_runtime_suspend,
1251 .runtime_resume = pci_pm_runtime_resume,
1252 .runtime_idle = pci_pm_runtime_idle,
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001253};
1254
Rafael J. Wysockiadf09492008-10-06 22:46:05 +02001255#define PCI_PM_OPS_PTR (&pci_dev_pm_ops)
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001256
Rafael J. Wysockifbb988b2014-11-27 23:16:57 +01001257#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. Wysockibbb44d92008-05-20 00:49:04 +02001262
1263#define PCI_PM_OPS_PTR NULL
1264
Rafael J. Wysockifbb988b2014-11-27 23:16:57 +01001265#endif /* !CONFIG_PM */
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001266
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267/**
Laurent riffard863b18f2005-10-27 23:12:54 +02001268 * __pci_register_driver - register a new pci driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 * @drv: the driver structure to register
Laurent riffard863b18f2005-10-27 23:12:54 +02001270 * @owner: owner module of drv
Randy Dunlapf95d8822007-02-10 14:41:56 -08001271 * @mod_name: module name string
Bjorn Helgaasf7625982013-11-14 11:28:18 -07001272 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 * Adds the driver structure to the list of registered drivers.
Bjorn Helgaasf7625982013-11-14 11:28:18 -07001274 * Returns a negative value on error, otherwise 0.
1275 * If no error occurred, the driver remains registered even if
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 * no device was claimed during registration.
1277 */
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -08001278int __pci_register_driver(struct pci_driver *drv, struct module *owner,
1279 const char *mod_name)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 /* initialize common driver fields */
1282 drv->driver.name = drv->name;
1283 drv->driver.bus = &pci_bus_type;
Laurent riffard863b18f2005-10-27 23:12:54 +02001284 drv->driver.owner = owner;
Greg Kroah-Hartman725522b2007-01-15 11:50:02 -08001285 drv->driver.mod_name = mod_name;
Alan Cox50b00752006-08-16 17:42:18 +01001286
Greg Kroah-Hartman75865852005-06-30 02:18:12 -07001287 spin_lock_init(&drv->dynids.lock);
1288 INIT_LIST_HEAD(&drv->dynids.list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
1290 /* register with core */
Konstantin Khlebnikovbfb09a82012-08-08 14:47:51 +04001291 return driver_register(&drv->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292}
Ryan Desfossesb7fe9432014-04-25 14:32:25 -06001293EXPORT_SYMBOL(__pci_register_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
1295/**
1296 * pci_unregister_driver - unregister a pci driver
1297 * @drv: the driver structure to unregister
Bjorn Helgaasf7625982013-11-14 11:28:18 -07001298 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 * 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 Desfosses3c78bc62014-04-18 20:13:49 -04001305void pci_unregister_driver(struct pci_driver *drv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306{
1307 driver_unregister(&drv->driver);
1308 pci_free_dynids(drv);
1309}
Ryan Desfossesb7fe9432014-04-25 14:32:25 -06001310EXPORT_SYMBOL(pci_unregister_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
1312static 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 Helgaasf7625982013-11-14 11:28:18 -07001320 * Returns the appropriate pci_driver structure or %NULL if there is no
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 * registered driver for the device.
1322 */
Ryan Desfosses3c78bc62014-04-18 20:13:49 -04001323struct pci_driver *pci_dev_driver(const struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324{
1325 if (dev->driver)
1326 return dev->driver;
1327 else {
1328 int i;
Ryan Desfosses3c78bc62014-04-18 20:13:49 -04001329 for (i = 0; i <= PCI_ROM_RESOURCE; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 if (dev->resource[i].flags & IORESOURCE_BUSY)
1331 return &pci_compat_driver;
1332 }
1333 return NULL;
1334}
Ryan Desfossesb7fe9432014-04-25 14:32:25 -06001335EXPORT_SYMBOL(pci_dev_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
1337/**
1338 * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 * @dev: the PCI device structure to match against
Randy Dunlap8f7020d2005-10-23 11:57:38 -07001340 * @drv: the device driver to search for matching PCI device id structures
Bjorn Helgaasf7625982013-11-14 11:28:18 -07001341 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 * Used by a driver to check whether a PCI device present in the
Randy Dunlap8f7020d2005-10-23 11:57:38 -07001343 * system is in its list of supported devices. Returns the matching
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 * pci_device_id structure or %NULL if there is no match.
1345 */
Greg Kroah-Hartman75865852005-06-30 02:18:12 -07001346static int pci_bus_match(struct device *dev, struct device_driver *drv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347{
Greg Kroah-Hartman75865852005-06-30 02:18:12 -07001348 struct pci_dev *pci_dev = to_pci_dev(dev);
Yinghai Lu58d9a382013-01-21 13:20:51 -08001349 struct pci_driver *pci_drv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 const struct pci_device_id *found_id;
1351
Yinghai Lu58d9a382013-01-21 13:20:51 -08001352 if (!pci_dev->match_driver)
1353 return 0;
1354
1355 pci_drv = to_pci_driver(drv);
Greg Kroah-Hartman75865852005-06-30 02:18:12 -07001356 found_id = pci_match_device(pci_drv, pci_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 if (found_id)
1358 return 1;
1359
Greg Kroah-Hartman75865852005-06-30 02:18:12 -07001360 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361}
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 */
1375struct pci_dev *pci_dev_get(struct pci_dev *dev)
1376{
1377 if (dev)
1378 get_device(&dev->dev);
1379 return dev;
1380}
Ryan Desfossesb7fe9432014-04-25 14:32:25 -06001381EXPORT_SYMBOL(pci_dev_get);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
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 */
1390void pci_dev_put(struct pci_dev *dev)
1391{
1392 if (dev)
1393 put_device(&dev->dev);
1394}
Ryan Desfossesb7fe9432014-04-25 14:32:25 -06001395EXPORT_SYMBOL(pci_dev_put);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
Bill Pemberton8ccc9aa2012-11-21 15:34:58 -05001397static 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 Pemberton8ccc9aa2012-11-21 15:34:58 -05001405
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 Delgado145b3fe2014-12-02 17:35:04 +01001419 if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X",
Bill Pemberton8ccc9aa2012-11-21 15:34:58 -05001420 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 Helgaasefdd4072014-04-05 15:08:22 -06001425
Bill Pemberton8ccc9aa2012-11-21 15:34:58 -05001426 return 0;
1427}
1428
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429struct bus_type pci_bus_type = {
1430 .name = "pci",
1431 .match = pci_bus_match,
Kay Sievers312c0042005-11-16 09:00:00 +01001432 .uevent = pci_uevent,
Russell Kingb15d6862006-01-05 14:30:22 +00001433 .probe = pci_device_probe,
1434 .remove = pci_device_remove,
Linus Torvaldscbd69db2006-06-24 14:50:29 -07001435 .shutdown = pci_device_shutdown,
Greg Kroah-Hartman5136b2d2013-10-06 23:55:40 -07001436 .dev_groups = pci_dev_groups,
Greg Kroah-Hartman0f49ba52013-10-07 14:51:02 -06001437 .bus_groups = pci_bus_groups,
Greg Kroah-Hartman2229c1f2013-10-07 14:51:20 -06001438 .drv_groups = pci_drv_groups,
Rafael J. Wysockibbb44d92008-05-20 00:49:04 +02001439 .pm = PCI_PM_OPS_PTR,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440};
Ryan Desfossesb7fe9432014-04-25 14:32:25 -06001441EXPORT_SYMBOL(pci_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442
1443static int __init pci_driver_init(void)
1444{
1445 return bus_register(&pci_bus_type);
1446}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447postcore_initcall(pci_driver_init);