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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "pci.h" |
| 20 | |
| 21 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | * Dynamic device IDs are disabled for !CONFIG_HOTPLUG |
| 23 | */ |
| 24 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 25 | struct pci_dynid { |
| 26 | struct list_head node; |
| 27 | struct pci_device_id id; |
| 28 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Greg KH | 3d3c2ae | 2005-07-06 09:09:38 -0700 | [diff] [blame] | 30 | #ifdef CONFIG_HOTPLUG |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | /** |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 33 | * store_new_id - add a new PCI device ID to this driver and re-probe devices |
| 34 | * @driver: target device driver |
| 35 | * @buf: buffer for scanning device ID data |
| 36 | * @count: input size |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | * |
| 38 | * Adds a new dynamic pci device ID to this driver, |
| 39 | * and causes the driver to probe for all devices again. |
| 40 | */ |
Randy Dunlap | f8eb100 | 2005-10-28 20:36:51 -0700 | [diff] [blame] | 41 | static ssize_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | store_new_id(struct device_driver *driver, const char *buf, size_t count) |
| 43 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 44 | struct pci_dynid *dynid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | struct pci_driver *pdrv = to_pci_driver(driver); |
Jean Delvare | 6ba1863 | 2007-04-07 17:21:28 +0200 | [diff] [blame] | 46 | __u32 vendor, device, subvendor=PCI_ANY_ID, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | subdevice=PCI_ANY_ID, class=0, class_mask=0; |
| 48 | unsigned long driver_data=0; |
| 49 | int fields=0; |
Greg Kroah-Hartman | b19441a | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 50 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | fields = sscanf(buf, "%x %x %x %x %x %x %lux", |
| 53 | &vendor, &device, &subvendor, &subdevice, |
| 54 | &class, &class_mask, &driver_data); |
Jean Delvare | 6ba1863 | 2007-04-07 17:21:28 +0200 | [diff] [blame] | 55 | if (fields < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | return -EINVAL; |
| 57 | |
Eric Sesterhenn | f5afe80 | 2006-02-28 15:34:49 +0100 | [diff] [blame] | 58 | dynid = kzalloc(sizeof(*dynid), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | if (!dynid) |
| 60 | return -ENOMEM; |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | dynid->id.vendor = vendor; |
| 63 | dynid->id.device = device; |
| 64 | dynid->id.subvendor = subvendor; |
| 65 | dynid->id.subdevice = subdevice; |
| 66 | dynid->id.class = class; |
| 67 | dynid->id.class_mask = class_mask; |
| 68 | dynid->id.driver_data = pdrv->dynids.use_driver_data ? |
| 69 | driver_data : 0UL; |
| 70 | |
| 71 | spin_lock(&pdrv->dynids.lock); |
Michael Ellerman | a56bc69 | 2007-09-14 15:33:13 +1000 | [diff] [blame] | 72 | list_add_tail(&dynid->node, &pdrv->dynids.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | spin_unlock(&pdrv->dynids.lock); |
| 74 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 75 | if (get_driver(&pdrv->driver)) { |
Greg Kroah-Hartman | b19441a | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 76 | retval = driver_attach(&pdrv->driver); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 77 | put_driver(&pdrv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | } |
| 79 | |
Greg Kroah-Hartman | b19441a | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 80 | if (retval) |
| 81 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | return count; |
| 83 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | static void |
| 87 | pci_free_dynids(struct pci_driver *drv) |
| 88 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 89 | struct pci_dynid *dynid, *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | spin_lock(&drv->dynids.lock); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 92 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | list_del(&dynid->node); |
| 94 | kfree(dynid); |
| 95 | } |
| 96 | spin_unlock(&drv->dynids.lock); |
| 97 | } |
| 98 | |
| 99 | static int |
| 100 | pci_create_newid_file(struct pci_driver *drv) |
| 101 | { |
| 102 | int error = 0; |
| 103 | if (drv->probe != NULL) |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 104 | error = driver_create_file(&drv->driver, &driver_attr_new_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | return error; |
| 106 | } |
| 107 | |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 108 | static void pci_remove_newid_file(struct pci_driver *drv) |
| 109 | { |
| 110 | driver_remove_file(&drv->driver, &driver_attr_new_id); |
| 111 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #else /* !CONFIG_HOTPLUG */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | static inline void pci_free_dynids(struct pci_driver *drv) {} |
| 114 | static inline int pci_create_newid_file(struct pci_driver *drv) |
| 115 | { |
| 116 | return 0; |
| 117 | } |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 118 | static inline void pci_remove_newid_file(struct pci_driver *drv) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | #endif |
| 120 | |
| 121 | /** |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 122 | * 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] | 123 | * @ids: array of PCI device id structures to search in |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 124 | * @dev: the PCI device structure to match against. |
| 125 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | * 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] | 127 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | * pci_device_id structure or %NULL if there is no match. |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 129 | * |
Randy Dunlap | 8b60756 | 2007-05-09 07:19:14 +0200 | [diff] [blame] | 130 | * 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] | 131 | * that a driver might want to check for. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 133 | const struct pci_device_id *pci_match_id(const struct pci_device_id *ids, |
| 134 | struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 136 | if (ids) { |
| 137 | while (ids->vendor || ids->subvendor || ids->class_mask) { |
| 138 | if (pci_match_one_device(ids, dev)) |
| 139 | return ids; |
| 140 | ids++; |
| 141 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | return NULL; |
| 144 | } |
| 145 | |
| 146 | /** |
Randy Dunlap | ae9608a | 2007-01-09 21:41:01 -0800 | [diff] [blame] | 147 | * 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] | 148 | * @drv: the PCI driver to match against |
Henrik Kretzschmar | 39ba487 | 2006-08-15 10:57:16 +0200 | [diff] [blame] | 149 | * @dev: the PCI device structure to match against |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 150 | * |
| 151 | * Used by a driver to check whether a PCI device present in the |
| 152 | * system is in its list of supported devices. Returns the matching |
| 153 | * pci_device_id structure or %NULL if there is no match. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | */ |
Adrian Bunk | d73460d | 2007-10-24 18:27:18 +0200 | [diff] [blame] | 155 | static const struct pci_device_id *pci_match_device(struct pci_driver *drv, |
| 156 | struct pci_dev *dev) |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 157 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 158 | struct pci_dynid *dynid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 160 | /* Look at the dynamic ids first, before the static ones */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 161 | spin_lock(&drv->dynids.lock); |
| 162 | list_for_each_entry(dynid, &drv->dynids.list, node) { |
| 163 | if (pci_match_one_device(&dynid->id, dev)) { |
| 164 | spin_unlock(&drv->dynids.lock); |
| 165 | return &dynid->id; |
| 166 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 168 | spin_unlock(&drv->dynids.lock); |
Russell King | 7461b60 | 2006-11-29 21:18:04 +0000 | [diff] [blame] | 169 | |
| 170 | return pci_match_id(drv->id_table, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | } |
| 172 | |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 173 | static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev, |
| 174 | const struct pci_device_id *id) |
| 175 | { |
| 176 | int error; |
| 177 | #ifdef CONFIG_NUMA |
| 178 | /* Execute driver initialization on node where the |
| 179 | device's bus is attached to. This way the driver likely |
| 180 | allocates its local memory on the right node without |
| 181 | any need to change it. */ |
| 182 | struct mempolicy *oldpol; |
| 183 | cpumask_t oldmask = current->cpus_allowed; |
| 184 | int node = pcibus_to_node(dev->bus); |
| 185 | if (node >= 0 && node_online(node)) |
| 186 | set_cpus_allowed(current, node_to_cpumask(node)); |
| 187 | /* And set default memory allocation policy */ |
| 188 | oldpol = current->mempolicy; |
Lee Schermerhorn | 74e27e4 | 2007-11-21 15:07:05 -0800 | [diff] [blame] | 189 | current->mempolicy = NULL; /* fall back to system default policy */ |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 190 | #endif |
| 191 | error = drv->probe(dev, id); |
| 192 | #ifdef CONFIG_NUMA |
| 193 | set_cpus_allowed(current, oldmask); |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 194 | current->mempolicy = oldpol; |
| 195 | #endif |
| 196 | return error; |
| 197 | } |
| 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | /** |
| 200 | * __pci_device_probe() |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 201 | * @drv: driver to call to check if it wants the PCI device |
| 202 | * @pci_dev: PCI device being probed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | * |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 204 | * returns 0 on success, else error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | * side-effect: pci_dev->driver is set to drv when drv claims pci_dev. |
| 206 | */ |
| 207 | static int |
| 208 | __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] | 209 | { |
| 210 | const struct pci_device_id *id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | int error = 0; |
| 212 | |
| 213 | if (!pci_dev->driver && drv->probe) { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 214 | error = -ENODEV; |
| 215 | |
| 216 | id = pci_match_device(drv, pci_dev); |
| 217 | if (id) |
Andi Kleen | d42c699 | 2005-07-06 19:56:03 +0200 | [diff] [blame] | 218 | error = pci_call_probe(drv, pci_dev, id); |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 219 | if (error >= 0) { |
| 220 | pci_dev->driver = drv; |
| 221 | error = 0; |
| 222 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
| 224 | return error; |
| 225 | } |
| 226 | |
| 227 | static int pci_device_probe(struct device * dev) |
| 228 | { |
| 229 | int error = 0; |
| 230 | struct pci_driver *drv; |
| 231 | struct pci_dev *pci_dev; |
| 232 | |
| 233 | drv = to_pci_driver(dev->driver); |
| 234 | pci_dev = to_pci_dev(dev); |
| 235 | pci_dev_get(pci_dev); |
| 236 | error = __pci_device_probe(drv, pci_dev); |
| 237 | if (error) |
| 238 | pci_dev_put(pci_dev); |
| 239 | |
| 240 | return error; |
| 241 | } |
| 242 | |
| 243 | static int pci_device_remove(struct device * dev) |
| 244 | { |
| 245 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 246 | struct pci_driver * drv = pci_dev->driver; |
| 247 | |
| 248 | if (drv) { |
| 249 | if (drv->remove) |
| 250 | drv->remove(pci_dev); |
| 251 | pci_dev->driver = NULL; |
| 252 | } |
| 253 | |
| 254 | /* |
Shaohua Li | 2449e06 | 2006-10-20 14:45:32 -0700 | [diff] [blame] | 255 | * If the device is still on, set the power state as "unknown", |
| 256 | * since it might change by the next time we load the driver. |
| 257 | */ |
| 258 | if (pci_dev->current_state == PCI_D0) |
| 259 | pci_dev->current_state = PCI_UNKNOWN; |
| 260 | |
| 261 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | * We would love to complain here if pci_dev->is_enabled is set, that |
| 263 | * the driver should have called pci_disable_device(), but the |
| 264 | * unfortunate fact is there are too many odd BIOS and bridge setups |
| 265 | * that don't like drivers doing that all of the time. |
| 266 | * Oh well, we can dream of sane hardware when we sleep, no matter how |
| 267 | * horrible the crap we have to deal with is when we are awake... |
| 268 | */ |
| 269 | |
| 270 | pci_dev_put(pci_dev); |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | static int pci_device_suspend(struct device * dev, pm_message_t state) |
| 275 | { |
| 276 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 277 | struct pci_driver * drv = pci_dev->driver; |
| 278 | int i = 0; |
| 279 | |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 280 | if (drv && drv->suspend) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | i = drv->suspend(pci_dev, state); |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 282 | suspend_report_result(drv->suspend, i); |
| 283 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | pci_save_state(pci_dev); |
Shaohua Li | 2449e06 | 2006-10-20 14:45:32 -0700 | [diff] [blame] | 285 | /* |
| 286 | * mark its power state as "unknown", since we don't know if |
| 287 | * e.g. the BIOS will change its device state when we suspend. |
| 288 | */ |
| 289 | if (pci_dev->current_state == PCI_D0) |
| 290 | pci_dev->current_state = PCI_UNKNOWN; |
Andrew Morton | 0266949 | 2006-03-23 01:38:34 -0800 | [diff] [blame] | 291 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | return i; |
| 293 | } |
| 294 | |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 295 | static int pci_device_suspend_late(struct device * dev, pm_message_t state) |
| 296 | { |
| 297 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 298 | struct pci_driver * drv = pci_dev->driver; |
| 299 | int i = 0; |
| 300 | |
| 301 | if (drv && drv->suspend_late) { |
| 302 | i = drv->suspend_late(pci_dev, state); |
| 303 | suspend_report_result(drv->suspend_late, i); |
| 304 | } |
| 305 | return i; |
| 306 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
Greg Kroah-Hartman | 95a6296 | 2005-07-28 11:37:33 -0700 | [diff] [blame] | 308 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | * Default resume method for devices that have no driver provided resume, |
| 310 | * or not even a driver at all. |
| 311 | */ |
Jean Delvare | 8d92bc2 | 2006-04-18 14:49:56 +0200 | [diff] [blame] | 312 | static int pci_default_resume(struct pci_dev *pci_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | { |
Jean Delvare | 8d92bc2 | 2006-04-18 14:49:56 +0200 | [diff] [blame] | 314 | int retval = 0; |
Greg Kroah-Hartman | 95a6296 | 2005-07-28 11:37:33 -0700 | [diff] [blame] | 315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | /* restore the PCI config space */ |
| 317 | pci_restore_state(pci_dev); |
| 318 | /* if the device was enabled before suspend, reenable */ |
Tejun Heo | 0b62e13 | 2007-07-27 14:43:35 +0900 | [diff] [blame] | 319 | retval = pci_reenable_device(pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | /* if the device was busmaster before the suspend, make it busmaster again */ |
| 321 | if (pci_dev->is_busmaster) |
| 322 | pci_set_master(pci_dev); |
Jean Delvare | 8d92bc2 | 2006-04-18 14:49:56 +0200 | [diff] [blame] | 323 | |
| 324 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | static int pci_device_resume(struct device * dev) |
| 328 | { |
Jean Delvare | 8d92bc2 | 2006-04-18 14:49:56 +0200 | [diff] [blame] | 329 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 331 | struct pci_driver * drv = pci_dev->driver; |
| 332 | |
| 333 | if (drv && drv->resume) |
Jean Delvare | 8d92bc2 | 2006-04-18 14:49:56 +0200 | [diff] [blame] | 334 | error = drv->resume(pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | else |
Jean Delvare | 8d92bc2 | 2006-04-18 14:49:56 +0200 | [diff] [blame] | 336 | error = pci_default_resume(pci_dev); |
| 337 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 340 | static int pci_device_resume_early(struct device * dev) |
| 341 | { |
| 342 | int error = 0; |
| 343 | struct pci_dev * pci_dev = to_pci_dev(dev); |
| 344 | struct pci_driver * drv = pci_dev->driver; |
| 345 | |
Alan Cox | 1597cac | 2006-12-04 15:14:45 -0800 | [diff] [blame] | 346 | pci_fixup_device(pci_fixup_resume, pci_dev); |
| 347 | |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 348 | if (drv && drv->resume_early) |
| 349 | error = drv->resume_early(pci_dev); |
| 350 | return error; |
| 351 | } |
| 352 | |
Greg KH | c895817 | 2005-04-08 14:53:31 +0900 | [diff] [blame] | 353 | static void pci_device_shutdown(struct device *dev) |
| 354 | { |
| 355 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 356 | struct pci_driver *drv = pci_dev->driver; |
| 357 | |
| 358 | if (drv && drv->shutdown) |
| 359 | drv->shutdown(pci_dev); |
| 360 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | /** |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 363 | * __pci_register_driver - register a new pci driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | * @drv: the driver structure to register |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 365 | * @owner: owner module of drv |
Randy Dunlap | f95d882 | 2007-02-10 14:41:56 -0800 | [diff] [blame] | 366 | * @mod_name: module name string |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | * |
| 368 | * Adds the driver structure to the list of registered drivers. |
| 369 | * Returns a negative value on error, otherwise 0. |
Steven Cole | eaae4b3 | 2005-05-03 18:38:30 -0600 | [diff] [blame] | 370 | * If no error occurred, the driver remains registered even if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | * no device was claimed during registration. |
| 372 | */ |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 373 | int __pci_register_driver(struct pci_driver *drv, struct module *owner, |
| 374 | const char *mod_name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | { |
| 376 | int error; |
| 377 | |
| 378 | /* initialize common driver fields */ |
| 379 | drv->driver.name = drv->name; |
| 380 | drv->driver.bus = &pci_bus_type; |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 381 | drv->driver.owner = owner; |
Greg Kroah-Hartman | 725522b | 2007-01-15 11:50:02 -0800 | [diff] [blame] | 382 | drv->driver.mod_name = mod_name; |
Alan Cox | 50b0075 | 2006-08-16 17:42:18 +0100 | [diff] [blame] | 383 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 384 | spin_lock_init(&drv->dynids.lock); |
| 385 | INIT_LIST_HEAD(&drv->dynids.list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | /* register with core */ |
| 388 | error = driver_register(&drv->driver); |
Akinobu Mita | 50bf14b | 2006-11-08 19:53:59 -0800 | [diff] [blame] | 389 | if (error) |
| 390 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Akinobu Mita | 50bf14b | 2006-11-08 19:53:59 -0800 | [diff] [blame] | 392 | error = pci_create_newid_file(drv); |
| 393 | if (error) |
| 394 | driver_unregister(&drv->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
| 396 | return error; |
| 397 | } |
| 398 | |
| 399 | /** |
| 400 | * pci_unregister_driver - unregister a pci driver |
| 401 | * @drv: the driver structure to unregister |
| 402 | * |
| 403 | * Deletes the driver structure from the list of registered PCI drivers, |
| 404 | * gives it a chance to clean up by calling its remove() function for |
| 405 | * each device it was responsible for, and marks those devices as |
| 406 | * driverless. |
| 407 | */ |
| 408 | |
| 409 | void |
| 410 | pci_unregister_driver(struct pci_driver *drv) |
| 411 | { |
Greg Kroah-Hartman | 03d43b1 | 2007-11-28 12:23:18 -0800 | [diff] [blame] | 412 | pci_remove_newid_file(drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | driver_unregister(&drv->driver); |
| 414 | pci_free_dynids(drv); |
| 415 | } |
| 416 | |
| 417 | static struct pci_driver pci_compat_driver = { |
| 418 | .name = "compat" |
| 419 | }; |
| 420 | |
| 421 | /** |
| 422 | * pci_dev_driver - get the pci_driver of a device |
| 423 | * @dev: the device to query |
| 424 | * |
| 425 | * Returns the appropriate pci_driver structure or %NULL if there is no |
| 426 | * registered driver for the device. |
| 427 | */ |
| 428 | struct pci_driver * |
| 429 | pci_dev_driver(const struct pci_dev *dev) |
| 430 | { |
| 431 | if (dev->driver) |
| 432 | return dev->driver; |
| 433 | else { |
| 434 | int i; |
| 435 | for(i=0; i<=PCI_ROM_RESOURCE; i++) |
| 436 | if (dev->resource[i].flags & IORESOURCE_BUSY) |
| 437 | return &pci_compat_driver; |
| 438 | } |
| 439 | return NULL; |
| 440 | } |
| 441 | |
| 442 | /** |
| 443 | * 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] | 444 | * @dev: the PCI device structure to match against |
Randy Dunlap | 8f7020d | 2005-10-23 11:57:38 -0700 | [diff] [blame] | 445 | * @drv: the device driver to search for matching PCI device id structures |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | * |
| 447 | * 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] | 448 | * system is in its list of supported devices. Returns the matching |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | * pci_device_id structure or %NULL if there is no match. |
| 450 | */ |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 451 | static int pci_bus_match(struct device *dev, struct device_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | { |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 453 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 454 | struct pci_driver *pci_drv = to_pci_driver(drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | const struct pci_device_id *found_id; |
| 456 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 457 | found_id = pci_match_device(pci_drv, pci_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | if (found_id) |
| 459 | return 1; |
| 460 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 461 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | /** |
| 465 | * pci_dev_get - increments the reference count of the pci device structure |
| 466 | * @dev: the device being referenced |
| 467 | * |
| 468 | * Each live reference to a device should be refcounted. |
| 469 | * |
| 470 | * Drivers for PCI devices should normally record such references in |
| 471 | * their probe() methods, when they bind to a device, and release |
| 472 | * them by calling pci_dev_put(), in their disconnect() methods. |
| 473 | * |
| 474 | * A pointer to the device with the incremented reference counter is returned. |
| 475 | */ |
| 476 | struct pci_dev *pci_dev_get(struct pci_dev *dev) |
| 477 | { |
| 478 | if (dev) |
| 479 | get_device(&dev->dev); |
| 480 | return dev; |
| 481 | } |
| 482 | |
| 483 | /** |
| 484 | * pci_dev_put - release a use of the pci device structure |
| 485 | * @dev: device that's been disconnected |
| 486 | * |
| 487 | * Must be called when a user of a device is finished with it. When the last |
| 488 | * user of the device calls this function, the memory of the device is freed. |
| 489 | */ |
| 490 | void pci_dev_put(struct pci_dev *dev) |
| 491 | { |
| 492 | if (dev) |
| 493 | put_device(&dev->dev); |
| 494 | } |
| 495 | |
| 496 | #ifndef CONFIG_HOTPLUG |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 497 | int pci_uevent(struct device *dev, struct kobj_uevent_env *env) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | { |
| 499 | return -ENODEV; |
| 500 | } |
| 501 | #endif |
| 502 | |
| 503 | struct bus_type pci_bus_type = { |
| 504 | .name = "pci", |
| 505 | .match = pci_bus_match, |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 506 | .uevent = pci_uevent, |
Russell King | b15d686 | 2006-01-05 14:30:22 +0000 | [diff] [blame] | 507 | .probe = pci_device_probe, |
| 508 | .remove = pci_device_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | .suspend = pci_device_suspend, |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 510 | .suspend_late = pci_device_suspend_late, |
| 511 | .resume_early = pci_device_resume_early, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | .resume = pci_device_resume, |
Linus Torvalds | cbd69db | 2006-06-24 14:50:29 -0700 | [diff] [blame] | 513 | .shutdown = pci_device_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | .dev_attrs = pci_dev_attrs, |
| 515 | }; |
| 516 | |
| 517 | static int __init pci_driver_init(void) |
| 518 | { |
| 519 | return bus_register(&pci_bus_type); |
| 520 | } |
| 521 | |
| 522 | postcore_initcall(pci_driver_init); |
| 523 | |
Greg Kroah-Hartman | 7586585 | 2005-06-30 02:18:12 -0700 | [diff] [blame] | 524 | EXPORT_SYMBOL(pci_match_id); |
Laurent riffard | 863b18f | 2005-10-27 23:12:54 +0200 | [diff] [blame] | 525 | EXPORT_SYMBOL(__pci_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | EXPORT_SYMBOL(pci_unregister_driver); |
| 527 | EXPORT_SYMBOL(pci_dev_driver); |
| 528 | EXPORT_SYMBOL(pci_bus_type); |
| 529 | EXPORT_SYMBOL(pci_dev_get); |
| 530 | EXPORT_SYMBOL(pci_dev_put); |