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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "pci.h" |
| 21 | |
| 22 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | * Dynamic device IDs are disabled for !CONFIG_HOTPLUG |
| 24 | */ |
| 25 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 26 | struct pci_dynid { |
| 27 | struct list_head node; |
| 28 | struct pci_device_id id; |
| 29 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Greg KH | 3d3c2ae | 2005-07-06 09:09:38 -0700 | [diff] [blame] | 31 | #ifdef CONFIG_HOTPLUG |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | /** |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 34 | * store_new_id - add a new PCI device ID to this driver and re-probe devices |
| 35 | * @driver: target device driver |
| 36 | * @buf: buffer for scanning device ID data |
| 37 | * @count: input size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | * |
| 39 | * Adds a new dynamic pci device ID to this driver, |
| 40 | * and causes the driver to probe for all devices again. |
| 41 | */ |
Randy Dunlap | f8eb100 | 2005-10-28 20:36:51 -0700 | [diff] [blame] | 42 | static ssize_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
| 44 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 45 | struct pci_dynid *dynid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | struct pci_driver *pdrv = to_pci_driver(driver); |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 47 | const struct pci_device_id *ids = pdrv->id_table; |
Jean Delvare | 6ba1863 | 2007-04-07 17:21:28 +0200 | [diff] [blame] | 48 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
| 50 | unsigned long driver_data=0; |
| 51 | int fields=0; |
Chris Wright | 2debb4d | 2008-11-25 19:36:10 -0800 | [diff] [blame] | 52 | int retval=0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 54 | fields = sscanf(buf, "%x %x %x %x %x %x %lx", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | &vendor, &device, &subvendor, &subdevice, |
| 56 | &class, &class_mask, &driver_data); |
Jean Delvare | 6ba1863 | 2007-04-07 17:21:28 +0200 | [diff] [blame] | 57 | if (fields < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | return -EINVAL; |
| 59 | |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 60 | /* Only accept driver_data values that match an existing id_table |
| 61 | entry */ |
Chris Wright | 2debb4d | 2008-11-25 19:36:10 -0800 | [diff] [blame] | 62 | if (ids) { |
| 63 | retval = -EINVAL; |
| 64 | while (ids->vendor || ids->subvendor || ids->class_mask) { |
| 65 | if (driver_data == ids->driver_data) { |
| 66 | retval = 0; |
| 67 | break; |
| 68 | } |
| 69 | ids++; |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 70 | } |
Chris Wright | 2debb4d | 2008-11-25 19:36:10 -0800 | [diff] [blame] | 71 | if (retval) /* No match */ |
| 72 | return retval; |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 73 | } |
Jean Delvare | b41d6cf | 2008-08-17 21:06:59 +0200 | [diff] [blame] | 74 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 75 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | if (!dynid) |
| 77 | return -ENOMEM; |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | dynid->id.vendor = vendor; |
| 80 | dynid->id.device = device; |
| 81 | dynid->id.subvendor = subvendor; |
| 82 | dynid->id.subdevice = subdevice; |
| 83 | dynid->id.class = class; |
| 84 | dynid->id.class_mask = class_mask; |
Milton Miller | edbc25c | 2008-07-10 16:29:37 -0500 | [diff] [blame] | 85 | dynid->id.driver_data = driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | spin_lock(&pdrv->dynids.lock); |
Michael Ellerman | a56bc69 | 2007-09-14 15:33:13 +1000 | [diff] [blame] | 88 | list_add_tail(&dynid->node, &pdrv->dynids.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | spin_unlock(&pdrv->dynids.lock); |
| 90 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 91 | if (get_driver(&pdrv->driver)) { |
Greg Kroah-Hartman | b19441a | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 92 | retval = driver_attach(&pdrv->driver); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 93 | put_driver(&pdrv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
Greg Kroah-Hartman | b19441a | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 96 | if (retval) |
| 97 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | return count; |
| 99 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
| 102 | static void |
| 103 | pci_free_dynids(struct pci_driver *drv) |
| 104 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 105 | struct pci_dynid *dynid, *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | spin_lock(&drv->dynids.lock); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 108 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | list_del(&dynid->node); |
| 110 | kfree(dynid); |
| 111 | } |
| 112 | spin_unlock(&drv->dynids.lock); |
| 113 | } |
| 114 | |
| 115 | static int |
| 116 | pci_create_newid_file(struct pci_driver *drv) |
| 117 | { |
| 118 | int error = 0; |
| 119 | if (drv->probe != NULL) |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 120 | error = driver_create_file(&drv->driver, &driver_attr_new_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | return error; |
| 122 | } |
| 123 | |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 124 | static void pci_remove_newid_file(struct pci_driver *drv) |
| 125 | { |
| 126 | driver_remove_file(&drv->driver, &driver_attr_new_id); |
| 127 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #else /* !CONFIG_HOTPLUG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static inline void pci_free_dynids(struct pci_driver *drv) {} |
| 130 | static inline int pci_create_newid_file(struct pci_driver *drv) |
| 131 | { |
| 132 | return 0; |
| 133 | } |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 134 | static inline void pci_remove_newid_file(struct pci_driver *drv) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | #endif |
| 136 | |
| 137 | /** |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 138 | * 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] | 139 | * @ids: array of PCI device id structures to search in |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 140 | * @dev: the PCI device structure to match against. |
| 141 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | * 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] | 143 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | * pci_device_id structure or %NULL if there is no match. |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 145 | * |
Randy Dunlap | 8b60756 | 2007-05-09 07:19:14 +0200 | [diff] [blame] | 146 | * 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] | 147 | * that a driver might want to check for. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 149 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
| 150 | struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 152 | if (ids) { |
| 153 | while (ids->vendor || ids->subvendor || ids->class_mask) { |
| 154 | if (pci_match_one_device(ids, dev)) |
| 155 | return ids; |
| 156 | ids++; |
| 157 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | return NULL; |
| 160 | } |
| 161 | |
| 162 | /** |
Randy Dunlap | ae9608a | 2007-01-09 21:41:01 -0800 | [diff] [blame] | 163 | * 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] | 164 | * @drv: the PCI driver to match against |
Henrik Kretzschmar | 39ba487 | 2006-08-15 10:57:16 +0200 | [diff] [blame] | 165 | * @dev: the PCI device structure to match against |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 166 | * |
| 167 | * Used by a driver to check whether a PCI device present in the |
| 168 | * system is in its list of supported devices. Returns the matching |
| 169 | * pci_device_id structure or %NULL if there is no match. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | */ |
Adrian Bunk | d73460d | 2007-10-24 18:27:18 +0200 | [diff] [blame] | 171 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
| 172 | struct pci_dev *dev) |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 173 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 174 | struct pci_dynid *dynid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 176 | /* Look at the dynamic ids first, before the static ones */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 177 | spin_lock(&drv->dynids.lock); |
| 178 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 179 | if (pci_match_one_device(&dynid->id, dev)) { |
| 180 | spin_unlock(&drv->dynids.lock); |
| 181 | return &dynid->id; |
| 182 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | } |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 184 | spin_unlock(&drv->dynids.lock); |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 185 | |
| 186 | return pci_match_id(drv->id_table, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 189 | struct drv_dev_and_id { |
| 190 | struct pci_driver *drv; |
| 191 | struct pci_dev *dev; |
| 192 | const struct pci_device_id *id; |
| 193 | }; |
| 194 | |
| 195 | static long local_pci_probe(void *_ddi) |
| 196 | { |
| 197 | struct drv_dev_and_id *ddi = _ddi; |
| 198 | |
| 199 | return ddi->drv->probe(ddi->dev, ddi->id); |
| 200 | } |
| 201 | |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 202 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
| 203 | const struct pci_device_id *id) |
| 204 | { |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 205 | int error, node; |
| 206 | struct drv_dev_and_id ddi = { drv, dev, id }; |
Mike Travis | f70316d | 2008-04-04 18:11:06 -0700 | [diff] [blame] | 207 | |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 208 | /* Execute driver initialization on node where the device's |
| 209 | bus is attached to. This way the driver likely allocates |
| 210 | its local memory on the right node without any need to |
| 211 | change it. */ |
| 212 | node = dev_to_node(&dev->dev); |
Mike Travis | f70316d | 2008-04-04 18:11:06 -0700 | [diff] [blame] | 213 | if (node >= 0) { |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 214 | int cpu; |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 215 | |
| 216 | get_online_cpus(); |
Rusty Russell | a70f730 | 2009-03-13 14:49:46 +1030 | [diff] [blame^] | 217 | cpu = cpumask_any_and(cpumask_of_node(node), cpu_online_mask); |
Rusty Russell | 873392c | 2008-12-31 23:54:56 +1030 | [diff] [blame] | 218 | if (cpu < nr_cpu_ids) |
| 219 | error = work_on_cpu(cpu, local_pci_probe, &ddi); |
| 220 | else |
| 221 | error = local_pci_probe(&ddi); |
| 222 | put_online_cpus(); |
| 223 | } else |
| 224 | error = local_pci_probe(&ddi); |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 225 | return error; |
| 226 | } |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | /** |
| 229 | * __pci_device_probe() |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 230 | * @drv: driver to call to check if it wants the PCI device |
| 231 | * @pci_dev: PCI device being probed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | * |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 233 | * returns 0 on success, else error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
| 235 | */ |
| 236 | static int |
| 237 | __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] | 238 | { |
| 239 | const struct pci_device_id *id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | int error = 0; |
| 241 | |
| 242 | if (!pci_dev->driver && drv->probe) { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 243 | error = -ENODEV; |
| 244 | |
| 245 | id = pci_match_device(drv, pci_dev); |
| 246 | if (id) |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 247 | error = pci_call_probe(drv, pci_dev, id); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 248 | if (error >= 0) { |
| 249 | pci_dev->driver = drv; |
| 250 | error = 0; |
| 251 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | } |
| 253 | return error; |
| 254 | } |
| 255 | |
| 256 | static int pci_device_probe(struct device * dev) |
| 257 | { |
| 258 | int error = 0; |
| 259 | struct pci_driver *drv; |
| 260 | struct pci_dev *pci_dev; |
| 261 | |
| 262 | drv = to_pci_driver(dev->driver); |
| 263 | pci_dev = to_pci_dev(dev); |
| 264 | pci_dev_get(pci_dev); |
| 265 | error = __pci_device_probe(drv, pci_dev); |
| 266 | if (error) |
| 267 | pci_dev_put(pci_dev); |
| 268 | |
| 269 | return error; |
| 270 | } |
| 271 | |
| 272 | static int pci_device_remove(struct device * dev) |
| 273 | { |
| 274 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 275 | struct pci_driver * drv = pci_dev->driver; |
| 276 | |
| 277 | if (drv) { |
| 278 | if (drv->remove) |
| 279 | drv->remove(pci_dev); |
| 280 | pci_dev->driver = NULL; |
| 281 | } |
| 282 | |
| 283 | /* |
Shaohua Li | 2449e06 | 2006-10-20 14:45:32 -0700 | [diff] [blame] | 284 | * If the device is still on, set the power state as "unknown", |
| 285 | * since it might change by the next time we load the driver. |
| 286 | */ |
| 287 | if (pci_dev->current_state == PCI_D0) |
| 288 | pci_dev->current_state = PCI_UNKNOWN; |
| 289 | |
| 290 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | * We would love to complain here if pci_dev->is_enabled is set, that |
| 292 | * the driver should have called pci_disable_device(), but the |
| 293 | * unfortunate fact is there are too many odd BIOS and bridge setups |
| 294 | * that don't like drivers doing that all of the time. |
| 295 | * Oh well, we can dream of sane hardware when we sleep, no matter how |
| 296 | * horrible the crap we have to deal with is when we are awake... |
| 297 | */ |
| 298 | |
| 299 | pci_dev_put(pci_dev); |
| 300 | return 0; |
| 301 | } |
| 302 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 303 | static void pci_device_shutdown(struct device *dev) |
| 304 | { |
| 305 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 306 | struct pci_driver *drv = pci_dev->driver; |
| 307 | |
| 308 | if (drv && drv->shutdown) |
| 309 | drv->shutdown(pci_dev); |
| 310 | pci_msi_shutdown(pci_dev); |
| 311 | pci_msix_shutdown(pci_dev); |
| 312 | } |
| 313 | |
| 314 | #ifdef CONFIG_PM_SLEEP |
| 315 | |
| 316 | /* |
| 317 | * Default "suspend" method for devices that have no driver provided suspend, |
Rafael J. Wysocki | fa58d30 | 2009-01-07 13:03:42 +0100 | [diff] [blame] | 318 | * or not even a driver at all (second part). |
| 319 | */ |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 320 | 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] | 321 | { |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 322 | /* |
| 323 | * mark its power state as "unknown", since we don't know if |
| 324 | * e.g. the BIOS will change its device state when we suspend. |
| 325 | */ |
| 326 | if (pci_dev->current_state == PCI_D0) |
| 327 | pci_dev->current_state = PCI_UNKNOWN; |
| 328 | } |
| 329 | |
| 330 | /* |
| 331 | * Default "resume" method for devices that have no driver provided resume, |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 332 | * or not even a driver at all (second part). |
| 333 | */ |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 334 | static int pci_pm_reenable_device(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 335 | { |
| 336 | int retval; |
| 337 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 338 | /* if the device was enabled before suspend, reenable */ |
| 339 | retval = pci_reenable_device(pci_dev); |
| 340 | /* |
| 341 | * if the device was busmaster before the suspend, make it busmaster |
| 342 | * again |
| 343 | */ |
| 344 | if (pci_dev->is_busmaster) |
| 345 | pci_set_master(pci_dev); |
| 346 | |
| 347 | return retval; |
| 348 | } |
| 349 | |
| 350 | static int pci_legacy_suspend(struct device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | { |
| 352 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 353 | struct pci_driver * drv = pci_dev->driver; |
| 354 | int i = 0; |
| 355 | |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 356 | if (drv && drv->suspend) { |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 357 | pci_power_t prev = pci_dev->current_state; |
| 358 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 359 | pci_dev->state_saved = false; |
| 360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | i = drv->suspend(pci_dev, state); |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 362 | suspend_report_result(drv->suspend, i); |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 363 | if (i) |
| 364 | return i; |
| 365 | |
| 366 | if (pci_dev->state_saved) |
| 367 | goto Fixup; |
| 368 | |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 369 | if (pci_dev->current_state != PCI_D0 |
| 370 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 371 | WARN_ONCE(pci_dev->current_state != prev, |
| 372 | "PCI PM: Device state not saved by %pF\n", |
| 373 | drv->suspend); |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 374 | goto Fixup; |
Rafael J. Wysocki | 99dadce | 2009-02-04 01:59:09 +0100 | [diff] [blame] | 375 | } |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 376 | } |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 377 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 378 | pci_save_state(pci_dev); |
| 379 | /* |
| 380 | * This is for compatibility with existing code with legacy PM support. |
| 381 | */ |
| 382 | pci_pm_set_unknown_state(pci_dev); |
| 383 | |
| 384 | Fixup: |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 385 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | return i; |
| 388 | } |
| 389 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 390 | 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] | 391 | { |
| 392 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 393 | struct pci_driver * drv = pci_dev->driver; |
| 394 | int i = 0; |
| 395 | |
| 396 | if (drv && drv->suspend_late) { |
| 397 | i = drv->suspend_late(pci_dev, state); |
| 398 | suspend_report_result(drv->suspend_late, i); |
| 399 | } |
| 400 | return i; |
| 401 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 403 | static int pci_legacy_resume_early(struct device *dev) |
| 404 | { |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 405 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 406 | struct pci_driver * drv = pci_dev->driver; |
| 407 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 408 | return drv && drv->resume_early ? |
| 409 | drv->resume_early(pci_dev) : 0; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 410 | } |
| 411 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 412 | static int pci_legacy_resume(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | { |
| 414 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 415 | struct pci_driver * drv = pci_dev->driver; |
| 416 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 417 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 418 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 419 | return drv && drv->resume ? |
| 420 | drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | } |
| 422 | |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 423 | /* Auxiliary functions used by the new power management framework */ |
| 424 | |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 425 | static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev) |
| 426 | { |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 427 | pci_restore_standard_config(pci_dev); |
Rafael J. Wysocki | 418e4da | 2009-01-26 21:43:08 +0100 | [diff] [blame] | 428 | pci_dev->state_saved = false; |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 429 | pci_fixup_device(pci_fixup_resume_early, pci_dev); |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 430 | } |
| 431 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 432 | static void pci_pm_default_resume(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 433 | { |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 434 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 435 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 436 | if (!pci_is_bridge(pci_dev)) |
| 437 | pci_enable_wake(pci_dev, PCI_D0, false); |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 438 | } |
| 439 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 440 | static void pci_pm_default_suspend(struct pci_dev *pci_dev) |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 441 | { |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 442 | /* Disable non-bridge devices without PM support */ |
Rafael J. Wysocki | cbbc2f6 | 2009-02-04 02:01:15 +0100 | [diff] [blame] | 443 | if (!pci_is_bridge(pci_dev)) |
| 444 | pci_disable_enabled_device(pci_dev); |
Rafael J. Wysocki | 73410429 | 2009-01-07 13:07:15 +0100 | [diff] [blame] | 445 | pci_save_state(pci_dev); |
| 446 | } |
| 447 | |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 448 | static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev) |
| 449 | { |
| 450 | struct pci_driver *drv = pci_dev->driver; |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 451 | bool ret = drv && (drv->suspend || drv->suspend_late || drv->resume |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 452 | || drv->resume_early); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 453 | |
| 454 | /* |
| 455 | * Legacy PM support is used by default, so warn if the new framework is |
| 456 | * supported as well. Drivers are supposed to support either the |
| 457 | * former, or the latter, but not both at the same time. |
| 458 | */ |
| 459 | WARN_ON(ret && drv->driver.pm); |
| 460 | |
| 461 | return ret; |
Rafael J. Wysocki | 07e836e | 2009-01-07 13:06:10 +0100 | [diff] [blame] | 462 | } |
| 463 | |
Rafael J. Wysocki | 571ff75 | 2009-01-07 13:05:05 +0100 | [diff] [blame] | 464 | /* New power management framework */ |
| 465 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 466 | static int pci_pm_prepare(struct device *dev) |
| 467 | { |
| 468 | struct device_driver *drv = dev->driver; |
| 469 | int error = 0; |
| 470 | |
| 471 | if (drv && drv->pm && drv->pm->prepare) |
| 472 | error = drv->pm->prepare(dev); |
| 473 | |
| 474 | return error; |
| 475 | } |
| 476 | |
| 477 | static void pci_pm_complete(struct device *dev) |
| 478 | { |
| 479 | struct device_driver *drv = dev->driver; |
| 480 | |
| 481 | if (drv && drv->pm && drv->pm->complete) |
| 482 | drv->pm->complete(dev); |
| 483 | } |
| 484 | |
| 485 | #ifdef CONFIG_SUSPEND |
| 486 | |
| 487 | static int pci_pm_suspend(struct device *dev) |
| 488 | { |
| 489 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | ddb7c9d | 2009-02-04 01:56:14 +0100 | [diff] [blame] | 490 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 491 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 492 | if (pci_has_legacy_pm_support(pci_dev)) |
| 493 | return pci_legacy_suspend(dev, PMSG_SUSPEND); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 494 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 495 | if (!pm) { |
| 496 | pci_pm_default_suspend(pci_dev); |
| 497 | goto Fixup; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 498 | } |
Rafael J. Wysocki | fa58d30 | 2009-01-07 13:03:42 +0100 | [diff] [blame] | 499 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 500 | pci_dev->state_saved = false; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 501 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 502 | if (pm->suspend) { |
| 503 | pci_power_t prev = pci_dev->current_state; |
| 504 | int error; |
| 505 | |
| 506 | error = pm->suspend(dev); |
| 507 | suspend_report_result(pm->suspend, error); |
| 508 | if (error) |
| 509 | return error; |
| 510 | |
| 511 | if (pci_dev->state_saved) |
| 512 | goto Fixup; |
| 513 | |
| 514 | if (pci_dev->current_state != PCI_D0 |
| 515 | && pci_dev->current_state != PCI_UNKNOWN) { |
| 516 | WARN_ONCE(pci_dev->current_state != prev, |
| 517 | "PCI PM: State of device not saved by %pF\n", |
| 518 | pm->suspend); |
| 519 | goto Fixup; |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | if (!pci_dev->state_saved) { |
| 524 | pci_save_state(pci_dev); |
| 525 | if (!pci_is_bridge(pci_dev)) |
| 526 | pci_prepare_to_sleep(pci_dev); |
| 527 | } |
| 528 | |
| 529 | Fixup: |
| 530 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
| 531 | |
| 532 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | static int pci_pm_suspend_noirq(struct device *dev) |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 536 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 537 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 538 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 539 | int error = 0; |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 540 | |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 541 | if (pci_has_legacy_pm_support(pci_dev)) |
| 542 | return pci_legacy_suspend_late(dev, PMSG_SUSPEND); |
| 543 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 544 | if (drv && drv->pm && drv->pm->suspend_noirq) { |
| 545 | error = drv->pm->suspend_noirq(dev); |
| 546 | suspend_report_result(drv->pm->suspend_noirq, error); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 547 | } |
| 548 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 549 | if (!error) |
| 550 | pci_pm_set_unknown_state(pci_dev); |
| 551 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 552 | return error; |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 553 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 555 | static int pci_pm_resume_noirq(struct device *dev) |
| 556 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 557 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 558 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 559 | int error = 0; |
| 560 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 561 | pci_pm_default_resume_noirq(pci_dev); |
| 562 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 563 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 564 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 565 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 566 | if (drv && drv->pm && drv->pm->resume_noirq) |
| 567 | error = drv->pm->resume_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 568 | |
| 569 | return error; |
| 570 | } |
| 571 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 572 | static int pci_pm_resume(struct device *dev) |
| 573 | { |
| 574 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 575 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 576 | int error = 0; |
| 577 | |
Rafael J. Wysocki | 418e4da | 2009-01-26 21:43:08 +0100 | [diff] [blame] | 578 | /* |
| 579 | * This is necessary for the suspend error path in which resume is |
| 580 | * called without restoring the standard config registers of the device. |
| 581 | */ |
| 582 | if (pci_dev->state_saved) |
| 583 | pci_restore_standard_config(pci_dev); |
| 584 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 585 | if (pci_has_legacy_pm_support(pci_dev)) |
| 586 | return pci_legacy_resume(dev); |
| 587 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 588 | pci_pm_default_resume(pci_dev); |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 589 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 590 | if (pm) { |
| 591 | if (pm->resume) |
| 592 | error = pm->resume(dev); |
| 593 | } else { |
| 594 | pci_pm_reenable_device(pci_dev); |
| 595 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 596 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 597 | return 0; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 598 | } |
| 599 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 600 | #else /* !CONFIG_SUSPEND */ |
| 601 | |
| 602 | #define pci_pm_suspend NULL |
| 603 | #define pci_pm_suspend_noirq NULL |
| 604 | #define pci_pm_resume NULL |
| 605 | #define pci_pm_resume_noirq NULL |
| 606 | |
| 607 | #endif /* !CONFIG_SUSPEND */ |
| 608 | |
| 609 | #ifdef CONFIG_HIBERNATION |
| 610 | |
| 611 | static int pci_pm_freeze(struct device *dev) |
| 612 | { |
| 613 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 614 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 615 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 616 | if (pci_has_legacy_pm_support(pci_dev)) |
| 617 | return pci_legacy_suspend(dev, PMSG_FREEZE); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 618 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 619 | if (!pm) { |
| 620 | pci_pm_default_suspend(pci_dev); |
| 621 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 622 | } |
| 623 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 624 | pci_dev->state_saved = false; |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 625 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 626 | if (pm->freeze) { |
| 627 | int error; |
| 628 | |
| 629 | error = pm->freeze(dev); |
| 630 | suspend_report_result(pm->freeze, error); |
| 631 | if (error) |
| 632 | return error; |
| 633 | } |
| 634 | |
| 635 | if (!pci_dev->state_saved) |
| 636 | pci_save_state(pci_dev); |
| 637 | |
| 638 | return 0; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | static int pci_pm_freeze_noirq(struct device *dev) |
| 642 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 643 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 644 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 645 | int error = 0; |
| 646 | |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 647 | if (pci_has_legacy_pm_support(pci_dev)) |
| 648 | return pci_legacy_suspend_late(dev, PMSG_FREEZE); |
| 649 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 650 | if (drv && drv->pm && drv->pm->freeze_noirq) { |
| 651 | error = drv->pm->freeze_noirq(dev); |
| 652 | suspend_report_result(drv->pm->freeze_noirq, error); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 653 | } |
| 654 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 655 | if (!error) |
| 656 | pci_pm_set_unknown_state(pci_dev); |
| 657 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 658 | return error; |
| 659 | } |
| 660 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 661 | static int pci_pm_thaw_noirq(struct device *dev) |
| 662 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 663 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 664 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 665 | int error = 0; |
| 666 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 667 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 668 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 669 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 670 | pci_update_current_state(pci_dev, PCI_D0); |
| 671 | |
| 672 | if (drv && drv->pm && drv->pm->thaw_noirq) |
| 673 | error = drv->pm->thaw_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 674 | |
| 675 | return error; |
| 676 | } |
| 677 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 678 | static int pci_pm_thaw(struct device *dev) |
| 679 | { |
| 680 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 681 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 682 | int error = 0; |
| 683 | |
| 684 | if (pci_has_legacy_pm_support(pci_dev)) |
| 685 | return pci_legacy_resume(dev); |
| 686 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 687 | if (pm) { |
| 688 | if (pm->thaw) |
| 689 | error = pm->thaw(dev); |
| 690 | } else { |
| 691 | pci_pm_reenable_device(pci_dev); |
| 692 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 693 | |
| 694 | return error; |
| 695 | } |
| 696 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 697 | static int pci_pm_poweroff(struct device *dev) |
| 698 | { |
Rafael J. Wysocki | 355a72d | 2008-12-08 00:34:57 +0100 | [diff] [blame] | 699 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | ddb7c9d | 2009-02-04 01:56:14 +0100 | [diff] [blame] | 700 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 701 | int error = 0; |
| 702 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 703 | if (pci_has_legacy_pm_support(pci_dev)) |
| 704 | return pci_legacy_suspend(dev, PMSG_HIBERNATE); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 705 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 706 | if (!pm) { |
| 707 | pci_pm_default_suspend(pci_dev); |
| 708 | goto Fixup; |
| 709 | } |
| 710 | |
| 711 | pci_dev->state_saved = false; |
| 712 | |
| 713 | if (pm->poweroff) { |
Rafael J. Wysocki | ddb7c9d | 2009-02-04 01:56:14 +0100 | [diff] [blame] | 714 | error = pm->poweroff(dev); |
| 715 | suspend_report_result(pm->poweroff, error); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 716 | } |
| 717 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 718 | if (!pci_dev->state_saved && !pci_is_bridge(pci_dev)) |
| 719 | pci_prepare_to_sleep(pci_dev); |
| 720 | |
| 721 | Fixup: |
| 722 | pci_fixup_device(pci_fixup_suspend, pci_dev); |
Rafael J. Wysocki | c9b9972 | 2009-01-07 13:02:36 +0100 | [diff] [blame] | 723 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 724 | return error; |
| 725 | } |
| 726 | |
| 727 | static int pci_pm_poweroff_noirq(struct device *dev) |
| 728 | { |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 729 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 730 | int error = 0; |
| 731 | |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 732 | if (pci_has_legacy_pm_support(to_pci_dev(dev))) |
| 733 | return pci_legacy_suspend_late(dev, PMSG_HIBERNATE); |
| 734 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 735 | if (drv && drv->pm && drv->pm->poweroff_noirq) { |
| 736 | error = drv->pm->poweroff_noirq(dev); |
| 737 | suspend_report_result(drv->pm->poweroff_noirq, error); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | return error; |
| 741 | } |
| 742 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 743 | static int pci_pm_restore_noirq(struct device *dev) |
| 744 | { |
| 745 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 746 | struct device_driver *drv = dev->driver; |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 747 | int error = 0; |
| 748 | |
Rafael J. Wysocki | aa8c6c9 | 2009-01-16 21:54:43 +0100 | [diff] [blame] | 749 | pci_pm_default_resume_noirq(pci_dev); |
| 750 | |
Rafael J. Wysocki | ad8cfa1 | 2009-01-07 13:09:37 +0100 | [diff] [blame] | 751 | if (pci_has_legacy_pm_support(pci_dev)) |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 752 | return pci_legacy_resume_early(dev); |
Rafael J. Wysocki | bb80894 | 2009-01-07 14:15:17 +0100 | [diff] [blame] | 753 | |
Rafael J. Wysocki | d67e37d | 2009-01-07 13:11:28 +0100 | [diff] [blame] | 754 | if (drv && drv->pm && drv->pm->restore_noirq) |
| 755 | error = drv->pm->restore_noirq(dev); |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 756 | |
| 757 | return error; |
| 758 | } |
| 759 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 760 | static int pci_pm_restore(struct device *dev) |
| 761 | { |
| 762 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 763 | struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 764 | int error = 0; |
| 765 | |
Rafael J. Wysocki | 418e4da | 2009-01-26 21:43:08 +0100 | [diff] [blame] | 766 | /* |
| 767 | * This is necessary for the hibernation error path in which restore is |
| 768 | * called without restoring the standard config registers of the device. |
| 769 | */ |
| 770 | if (pci_dev->state_saved) |
| 771 | pci_restore_standard_config(pci_dev); |
| 772 | |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 773 | if (pci_has_legacy_pm_support(pci_dev)) |
| 774 | return pci_legacy_resume(dev); |
| 775 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 776 | pci_pm_default_resume(pci_dev); |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 777 | |
Rafael J. Wysocki | 5294e25 | 2009-02-04 02:09:07 +0100 | [diff] [blame] | 778 | if (pm) { |
| 779 | if (pm->restore) |
| 780 | error = pm->restore(dev); |
| 781 | } else { |
| 782 | pci_pm_reenable_device(pci_dev); |
| 783 | } |
Rafael J. Wysocki | f6dc1e5 | 2009-01-07 13:12:22 +0100 | [diff] [blame] | 784 | |
| 785 | return error; |
| 786 | } |
| 787 | |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 788 | #else /* !CONFIG_HIBERNATION */ |
| 789 | |
| 790 | #define pci_pm_freeze NULL |
| 791 | #define pci_pm_freeze_noirq NULL |
| 792 | #define pci_pm_thaw NULL |
| 793 | #define pci_pm_thaw_noirq NULL |
| 794 | #define pci_pm_poweroff NULL |
| 795 | #define pci_pm_poweroff_noirq NULL |
| 796 | #define pci_pm_restore NULL |
| 797 | #define pci_pm_restore_noirq NULL |
| 798 | |
| 799 | #endif /* !CONFIG_HIBERNATION */ |
| 800 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 801 | struct dev_pm_ops pci_dev_pm_ops = { |
| 802 | .prepare = pci_pm_prepare, |
| 803 | .complete = pci_pm_complete, |
| 804 | .suspend = pci_pm_suspend, |
| 805 | .resume = pci_pm_resume, |
| 806 | .freeze = pci_pm_freeze, |
| 807 | .thaw = pci_pm_thaw, |
| 808 | .poweroff = pci_pm_poweroff, |
| 809 | .restore = pci_pm_restore, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 810 | .suspend_noirq = pci_pm_suspend_noirq, |
| 811 | .resume_noirq = pci_pm_resume_noirq, |
| 812 | .freeze_noirq = pci_pm_freeze_noirq, |
| 813 | .thaw_noirq = pci_pm_thaw_noirq, |
| 814 | .poweroff_noirq = pci_pm_poweroff_noirq, |
| 815 | .restore_noirq = pci_pm_restore_noirq, |
| 816 | }; |
| 817 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 818 | #define PCI_PM_OPS_PTR (&pci_dev_pm_ops) |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 819 | |
| 820 | #else /* !CONFIG_PM_SLEEP */ |
| 821 | |
| 822 | #define PCI_PM_OPS_PTR NULL |
| 823 | |
| 824 | #endif /* !CONFIG_PM_SLEEP */ |
| 825 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | /** |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 827 | * __pci_register_driver - register a new pci driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | * @drv: the driver structure to register |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 829 | * @owner: owner module of drv |
Randy Dunlap | f95d882 | 2007-02-10 14:41:56 -0800 | [diff] [blame] | 830 | * @mod_name: module name string |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | * |
| 832 | * Adds the driver structure to the list of registered drivers. |
| 833 | * Returns a negative value on error, otherwise 0. |
Steven Cole | eaae4b3 | 2005-05-03 18:38:30 -0600 | [diff] [blame] | 834 | * If no error occurred, the driver remains registered even if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | * no device was claimed during registration. |
| 836 | */ |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 837 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
| 838 | const char *mod_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | { |
| 840 | int error; |
| 841 | |
| 842 | /* initialize common driver fields */ |
| 843 | drv->driver.name = drv->name; |
| 844 | drv->driver.bus = &pci_bus_type; |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 845 | drv->driver.owner = owner; |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 846 | drv->driver.mod_name = mod_name; |
Alan Cox | 50b0075 | 2006-08-16 17:42:18 +0100 | [diff] [blame] | 847 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 848 | spin_lock_init(&drv->dynids.lock); |
| 849 | INIT_LIST_HEAD(&drv->dynids.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
| 851 | /* register with core */ |
| 852 | error = driver_register(&drv->driver); |
Akinobu Mita | 50bf14b | 2006-11-08 19:53:59 -0800 | [diff] [blame] | 853 | if (error) |
| 854 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
Akinobu Mita | 50bf14b | 2006-11-08 19:53:59 -0800 | [diff] [blame] | 856 | error = pci_create_newid_file(drv); |
| 857 | if (error) |
| 858 | driver_unregister(&drv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
| 860 | return error; |
| 861 | } |
| 862 | |
| 863 | /** |
| 864 | * pci_unregister_driver - unregister a pci driver |
| 865 | * @drv: the driver structure to unregister |
| 866 | * |
| 867 | * Deletes the driver structure from the list of registered PCI drivers, |
| 868 | * gives it a chance to clean up by calling its remove() function for |
| 869 | * each device it was responsible for, and marks those devices as |
| 870 | * driverless. |
| 871 | */ |
| 872 | |
| 873 | void |
| 874 | pci_unregister_driver(struct pci_driver *drv) |
| 875 | { |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 876 | pci_remove_newid_file(drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | driver_unregister(&drv->driver); |
| 878 | pci_free_dynids(drv); |
| 879 | } |
| 880 | |
| 881 | static struct pci_driver pci_compat_driver = { |
| 882 | .name = "compat" |
| 883 | }; |
| 884 | |
| 885 | /** |
| 886 | * pci_dev_driver - get the pci_driver of a device |
| 887 | * @dev: the device to query |
| 888 | * |
| 889 | * Returns the appropriate pci_driver structure or %NULL if there is no |
| 890 | * registered driver for the device. |
| 891 | */ |
| 892 | struct pci_driver * |
| 893 | pci_dev_driver(const struct pci_dev *dev) |
| 894 | { |
| 895 | if (dev->driver) |
| 896 | return dev->driver; |
| 897 | else { |
| 898 | int i; |
| 899 | for(i=0; i<=PCI_ROM_RESOURCE; i++) |
| 900 | if (dev->resource[i].flags & IORESOURCE_BUSY) |
| 901 | return &pci_compat_driver; |
| 902 | } |
| 903 | return NULL; |
| 904 | } |
| 905 | |
| 906 | /** |
| 907 | * 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] | 908 | * @dev: the PCI device structure to match against |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 909 | * @drv: the device driver to search for matching PCI device id structures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | * |
| 911 | * 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] | 912 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | * pci_device_id structure or %NULL if there is no match. |
| 914 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 915 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 917 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 918 | struct pci_driver *pci_drv = to_pci_driver(drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | const struct pci_device_id *found_id; |
| 920 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 921 | found_id = pci_match_device(pci_drv, pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | if (found_id) |
| 923 | return 1; |
| 924 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 925 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | /** |
| 929 | * pci_dev_get - increments the reference count of the pci device structure |
| 930 | * @dev: the device being referenced |
| 931 | * |
| 932 | * Each live reference to a device should be refcounted. |
| 933 | * |
| 934 | * Drivers for PCI devices should normally record such references in |
| 935 | * their probe() methods, when they bind to a device, and release |
| 936 | * them by calling pci_dev_put(), in their disconnect() methods. |
| 937 | * |
| 938 | * A pointer to the device with the incremented reference counter is returned. |
| 939 | */ |
| 940 | struct pci_dev *pci_dev_get(struct pci_dev *dev) |
| 941 | { |
| 942 | if (dev) |
| 943 | get_device(&dev->dev); |
| 944 | return dev; |
| 945 | } |
| 946 | |
| 947 | /** |
| 948 | * pci_dev_put - release a use of the pci device structure |
| 949 | * @dev: device that's been disconnected |
| 950 | * |
| 951 | * Must be called when a user of a device is finished with it. When the last |
| 952 | * user of the device calls this function, the memory of the device is freed. |
| 953 | */ |
| 954 | void pci_dev_put(struct pci_dev *dev) |
| 955 | { |
| 956 | if (dev) |
| 957 | put_device(&dev->dev); |
| 958 | } |
| 959 | |
| 960 | #ifndef CONFIG_HOTPLUG |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 961 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | { |
| 963 | return -ENODEV; |
| 964 | } |
| 965 | #endif |
| 966 | |
| 967 | struct bus_type pci_bus_type = { |
| 968 | .name = "pci", |
| 969 | .match = pci_bus_match, |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 970 | .uevent = pci_uevent, |
Russell King | b15d686 | 2006-01-05 14:30:22 +0000 | [diff] [blame] | 971 | .probe = pci_device_probe, |
| 972 | .remove = pci_device_remove, |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 973 | .shutdown = pci_device_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | .dev_attrs = pci_dev_attrs, |
Rafael J. Wysocki | bbb44d9 | 2008-05-20 00:49:04 +0200 | [diff] [blame] | 975 | .pm = PCI_PM_OPS_PTR, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | }; |
| 977 | |
| 978 | static int __init pci_driver_init(void) |
| 979 | { |
| 980 | return bus_register(&pci_bus_type); |
| 981 | } |
| 982 | |
| 983 | postcore_initcall(pci_driver_init); |
| 984 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 985 | EXPORT_SYMBOL(pci_match_id); |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 986 | EXPORT_SYMBOL(__pci_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | EXPORT_SYMBOL(pci_unregister_driver); |
| 988 | EXPORT_SYMBOL(pci_dev_driver); |
| 989 | EXPORT_SYMBOL(pci_bus_type); |
| 990 | EXPORT_SYMBOL(pci_dev_get); |
| 991 | EXPORT_SYMBOL(pci_dev_put); |