Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * File: pci-acpi.c |
Len Brown | a406d9e | 2005-03-23 16:16:03 -0500 | [diff] [blame] | 3 | * Purpose: Provide PCI support in ACPI |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 5 | * Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com> |
| 6 | * Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com> |
| 7 | * Copyright (C) 2004 Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/delay.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/pci.h> |
| 13 | #include <linux/module.h> |
Shaohua Li | 5fde244 | 2008-07-23 10:32:24 +0800 | [diff] [blame] | 14 | #include <linux/pci-aspm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <acpi/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <acpi/acpi_bus.h> |
| 17 | |
| 18 | #include <linux/pci-acpi.h> |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 19 | #include <linux/pm_runtime.h> |
Rafael J. Wysocki | 8b713a8 | 2012-10-24 02:08:38 +0200 | [diff] [blame] | 20 | #include <linux/pm_qos.h> |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 21 | #include "pci.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 23 | /** |
| 24 | * pci_acpi_wake_bus - Wake-up notification handler for root buses. |
| 25 | * @handle: ACPI handle of a device the notification is for. |
| 26 | * @event: Type of the signaled event. |
| 27 | * @context: PCI root bus to wake up devices on. |
| 28 | */ |
| 29 | static void pci_acpi_wake_bus(acpi_handle handle, u32 event, void *context) |
| 30 | { |
| 31 | struct pci_bus *pci_bus = context; |
| 32 | |
| 33 | if (event == ACPI_NOTIFY_DEVICE_WAKE && pci_bus) |
| 34 | pci_pme_wakeup_bus(pci_bus); |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * pci_acpi_wake_dev - Wake-up notification handler for PCI devices. |
| 39 | * @handle: ACPI handle of a device the notification is for. |
| 40 | * @event: Type of the signaled event. |
| 41 | * @context: PCI device object to wake up. |
| 42 | */ |
| 43 | static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context) |
| 44 | { |
| 45 | struct pci_dev *pci_dev = context; |
| 46 | |
Rafael J. Wysocki | a424948 | 2011-11-06 22:21:46 +0100 | [diff] [blame] | 47 | if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev) |
| 48 | return; |
| 49 | |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 50 | if (pci_dev->current_state == PCI_D3cold) { |
| 51 | pci_wakeup_event(pci_dev); |
| 52 | pm_runtime_resume(&pci_dev->dev); |
| 53 | return; |
| 54 | } |
| 55 | |
Rafael J. Wysocki | 24ad0ef | 2013-03-28 11:07:29 +0000 | [diff] [blame] | 56 | /* Clear PME Status if set. */ |
| 57 | if (pci_dev->pme_support) |
| 58 | pci_check_pme_status(pci_dev); |
Rafael J. Wysocki | 379021d | 2011-10-03 23:16:33 +0200 | [diff] [blame] | 59 | |
Rafael J. Wysocki | 24ad0ef | 2013-03-28 11:07:29 +0000 | [diff] [blame] | 60 | if (pci_dev->pme_poll) |
| 61 | pci_dev->pme_poll = false; |
| 62 | |
| 63 | pci_wakeup_event(pci_dev); |
| 64 | pm_runtime_resume(&pci_dev->dev); |
Rafael J. Wysocki | a424948 | 2011-11-06 22:21:46 +0100 | [diff] [blame] | 65 | |
| 66 | if (pci_dev->subordinate) |
| 67 | pci_pme_wakeup_bus(pci_dev->subordinate); |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | /** |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 71 | * pci_acpi_add_bus_pm_notifier - Register PM notifier for given PCI bus. |
| 72 | * @dev: ACPI device to add the notifier for. |
| 73 | * @pci_bus: PCI bus to walk checking for PME status if an event is signaled. |
| 74 | */ |
| 75 | acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev, |
| 76 | struct pci_bus *pci_bus) |
| 77 | { |
Rafael J. Wysocki | ec2cd81 | 2012-11-02 01:40:09 +0100 | [diff] [blame] | 78 | return acpi_add_pm_notifier(dev, pci_acpi_wake_bus, pci_bus); |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | /** |
| 82 | * pci_acpi_remove_bus_pm_notifier - Unregister PCI bus PM notifier. |
| 83 | * @dev: ACPI device to remove the notifier from. |
| 84 | */ |
| 85 | acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev) |
| 86 | { |
Rafael J. Wysocki | ec2cd81 | 2012-11-02 01:40:09 +0100 | [diff] [blame] | 87 | return acpi_remove_pm_notifier(dev, pci_acpi_wake_bus); |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | /** |
| 91 | * pci_acpi_add_pm_notifier - Register PM notifier for given PCI device. |
| 92 | * @dev: ACPI device to add the notifier for. |
| 93 | * @pci_dev: PCI device to check for the PME status if an event is signaled. |
| 94 | */ |
| 95 | acpi_status pci_acpi_add_pm_notifier(struct acpi_device *dev, |
| 96 | struct pci_dev *pci_dev) |
| 97 | { |
Rafael J. Wysocki | ec2cd81 | 2012-11-02 01:40:09 +0100 | [diff] [blame] | 98 | return acpi_add_pm_notifier(dev, pci_acpi_wake_dev, pci_dev); |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | /** |
| 102 | * pci_acpi_remove_pm_notifier - Unregister PCI device PM notifier. |
| 103 | * @dev: ACPI device to remove the notifier from. |
| 104 | */ |
| 105 | acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev) |
| 106 | { |
Rafael J. Wysocki | ec2cd81 | 2012-11-02 01:40:09 +0100 | [diff] [blame] | 107 | return acpi_remove_pm_notifier(dev, pci_acpi_wake_dev); |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 108 | } |
| 109 | |
Jiang Liu | f4b57a3 | 2012-06-22 14:55:16 +0800 | [diff] [blame] | 110 | phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle) |
| 111 | { |
| 112 | acpi_status status = AE_NOT_EXIST; |
| 113 | unsigned long long mcfg_addr; |
| 114 | |
| 115 | if (handle) |
| 116 | status = acpi_evaluate_integer(handle, METHOD_NAME__CBA, |
| 117 | NULL, &mcfg_addr); |
| 118 | if (ACPI_FAILURE(status)) |
| 119 | return 0; |
| 120 | |
| 121 | return (phys_addr_t)mcfg_addr; |
| 122 | } |
| 123 | |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 124 | /* |
| 125 | * _SxD returns the D-state with the highest power |
| 126 | * (lowest D-state number) supported in the S-state "x". |
| 127 | * |
| 128 | * If the devices does not have a _PRW |
| 129 | * (Power Resources for Wake) supporting system wakeup from "x" |
| 130 | * then the OS is free to choose a lower power (higher number |
| 131 | * D-state) than the return value from _SxD. |
| 132 | * |
| 133 | * But if _PRW is enabled at S-state "x", the OS |
| 134 | * must not choose a power lower than _SxD -- |
| 135 | * unless the device has an _SxW method specifying |
| 136 | * the lowest power (highest D-state number) the device |
| 137 | * may enter while still able to wake the system. |
| 138 | * |
| 139 | * ie. depending on global OS policy: |
| 140 | * |
| 141 | * if (_PRW at S-state x) |
| 142 | * choose from highest power _SxD to lowest power _SxW |
| 143 | * else // no _PRW at S-state x |
| 144 | * choose highest power _SxD or any lower power |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 145 | */ |
| 146 | |
Rafael J. Wysocki | 8d2bdf4 | 2008-06-05 01:16:37 +0200 | [diff] [blame] | 147 | static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 148 | { |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 149 | int acpi_state, d_max; |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 150 | |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 151 | if (pdev->no_d3cold) |
| 152 | d_max = ACPI_STATE_D3_HOT; |
| 153 | else |
| 154 | d_max = ACPI_STATE_D3_COLD; |
| 155 | acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL, d_max); |
Shaohua Li | ab826ca | 2007-07-20 10:03:22 +0800 | [diff] [blame] | 156 | if (acpi_state < 0) |
| 157 | return PCI_POWER_ERROR; |
| 158 | |
| 159 | switch (acpi_state) { |
| 160 | case ACPI_STATE_D0: |
| 161 | return PCI_D0; |
| 162 | case ACPI_STATE_D1: |
| 163 | return PCI_D1; |
| 164 | case ACPI_STATE_D2: |
| 165 | return PCI_D2; |
Lin Ming | 1cc0c99 | 2012-04-23 09:03:49 +0800 | [diff] [blame] | 166 | case ACPI_STATE_D3_HOT: |
Shaohua Li | ab826ca | 2007-07-20 10:03:22 +0800 | [diff] [blame] | 167 | return PCI_D3hot; |
Lin Ming | 28c2103 | 2011-05-04 22:56:43 +0800 | [diff] [blame] | 168 | case ACPI_STATE_D3_COLD: |
| 169 | return PCI_D3cold; |
Shaohua Li | ab826ca | 2007-07-20 10:03:22 +0800 | [diff] [blame] | 170 | } |
| 171 | return PCI_POWER_ERROR; |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 172 | } |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 173 | |
| 174 | static bool acpi_pci_power_manageable(struct pci_dev *dev) |
| 175 | { |
| 176 | acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev); |
| 177 | |
| 178 | return handle ? acpi_bus_power_manageable(handle) : false; |
| 179 | } |
David Shaohua Li | 0f64474 | 2005-03-19 00:15:48 -0500 | [diff] [blame] | 180 | |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 181 | static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state) |
| 182 | { |
| 183 | acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev); |
Shaohua Li | 10b3dca | 2007-07-20 10:03:25 +0800 | [diff] [blame] | 184 | acpi_handle tmp; |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 185 | static const u8 state_conv[] = { |
| 186 | [PCI_D0] = ACPI_STATE_D0, |
| 187 | [PCI_D1] = ACPI_STATE_D1, |
| 188 | [PCI_D2] = ACPI_STATE_D2, |
Rafael J. Wysocki | fc6504b | 2013-06-14 00:29:50 +0200 | [diff] [blame] | 189 | [PCI_D3hot] = ACPI_STATE_D3_COLD, |
| 190 | [PCI_D3cold] = ACPI_STATE_D3_COLD, |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 191 | }; |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 192 | int error = -EINVAL; |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 193 | |
Shaohua Li | 10b3dca | 2007-07-20 10:03:25 +0800 | [diff] [blame] | 194 | /* If the ACPI device has _EJ0, ignore the device */ |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 195 | if (!handle || ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp))) |
| 196 | return -ENODEV; |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 197 | |
| 198 | switch (state) { |
Rafael J. Wysocki | 8b713a8 | 2012-10-24 02:08:38 +0200 | [diff] [blame] | 199 | case PCI_D3cold: |
| 200 | if (dev_pm_qos_flags(&dev->dev, PM_QOS_FLAG_NO_POWER_OFF) == |
| 201 | PM_QOS_FLAGS_ALL) { |
| 202 | error = -EBUSY; |
| 203 | break; |
| 204 | } |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 205 | case PCI_D0: |
| 206 | case PCI_D1: |
| 207 | case PCI_D2: |
| 208 | case PCI_D3hot: |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 209 | error = acpi_bus_set_power(handle, state_conv[state]); |
David Brownell | 583c377 | 2008-02-22 21:41:51 -0800 | [diff] [blame] | 210 | } |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 211 | |
| 212 | if (!error) |
Lan Tianyu | d010e57 | 2013-07-30 10:32:30 +0800 | [diff] [blame] | 213 | dev_dbg(&dev->dev, "power state changed by ACPI to %s\n", |
Rafael J. Wysocki | fc6504b | 2013-06-14 00:29:50 +0200 | [diff] [blame] | 214 | acpi_power_state_string(state_conv[state])); |
Rafael J. Wysocki | 44e4e66 | 2008-07-07 03:32:52 +0200 | [diff] [blame] | 215 | |
| 216 | return error; |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 217 | } |
| 218 | |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 219 | static bool acpi_pci_can_wakeup(struct pci_dev *dev) |
| 220 | { |
| 221 | acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev); |
| 222 | |
| 223 | return handle ? acpi_bus_can_wakeup(handle) : false; |
| 224 | } |
| 225 | |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 226 | static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable) |
| 227 | { |
| 228 | while (bus->parent) { |
Rafael J. Wysocki | dc1a94a | 2009-11-29 16:35:54 +0100 | [diff] [blame] | 229 | if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable)) |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 230 | return; |
| 231 | bus = bus->parent; |
| 232 | } |
| 233 | |
| 234 | /* We have reached the root bus. */ |
| 235 | if (bus->bridge) |
| 236 | acpi_pm_device_sleep_wake(bus->bridge, enable); |
| 237 | } |
| 238 | |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 239 | static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable) |
| 240 | { |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 241 | if (acpi_pci_can_wakeup(dev)) |
| 242 | return acpi_pm_device_sleep_wake(&dev->dev, enable); |
| 243 | |
Rafael J. Wysocki | dc1a94a | 2009-11-29 16:35:54 +0100 | [diff] [blame] | 244 | acpi_pci_propagate_wakeup_enable(dev->bus, enable); |
Rafael J. Wysocki | 0baed8d | 2009-09-08 23:16:24 +0200 | [diff] [blame] | 245 | return 0; |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 246 | } |
| 247 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 248 | static void acpi_pci_propagate_run_wake(struct pci_bus *bus, bool enable) |
| 249 | { |
| 250 | while (bus->parent) { |
| 251 | struct pci_dev *bridge = bus->self; |
| 252 | |
| 253 | if (bridge->pme_interrupt) |
| 254 | return; |
Lin Ming | b24e509 | 2012-03-27 15:43:25 +0800 | [diff] [blame] | 255 | if (!acpi_pm_device_run_wake(&bridge->dev, enable)) |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 256 | return; |
| 257 | bus = bus->parent; |
| 258 | } |
| 259 | |
| 260 | /* We have reached the root bus. */ |
| 261 | if (bus->bridge) |
Lin Ming | b24e509 | 2012-03-27 15:43:25 +0800 | [diff] [blame] | 262 | acpi_pm_device_run_wake(bus->bridge, enable); |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | static int acpi_pci_run_wake(struct pci_dev *dev, bool enable) |
| 266 | { |
Huang Ying | 448bd85 | 2012-06-23 10:23:51 +0800 | [diff] [blame] | 267 | /* |
| 268 | * Per PCI Express Base Specification Revision 2.0 section |
| 269 | * 5.3.3.2 Link Wakeup, platform support is needed for D3cold |
| 270 | * waking up to power on the main link even if there is PME |
| 271 | * support for D3cold |
| 272 | */ |
| 273 | if (dev->pme_interrupt && !dev->runtime_d3cold) |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 274 | return 0; |
| 275 | |
Lin Ming | b24e509 | 2012-03-27 15:43:25 +0800 | [diff] [blame] | 276 | if (!acpi_pm_device_run_wake(&dev->dev, enable)) |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 277 | return 0; |
| 278 | |
| 279 | acpi_pci_propagate_run_wake(dev->bus, enable); |
| 280 | return 0; |
| 281 | } |
| 282 | |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 283 | static struct pci_platform_pm_ops acpi_pci_platform_pm = { |
| 284 | .is_manageable = acpi_pci_power_manageable, |
| 285 | .set_state = acpi_pci_set_power_state, |
| 286 | .choose_state = acpi_pci_choose_state, |
Rafael J. Wysocki | eb9d0fe | 2008-07-07 03:34:48 +0200 | [diff] [blame] | 287 | .sleep_wake = acpi_pci_sleep_wake, |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 288 | .run_wake = acpi_pci_run_wake, |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 289 | }; |
David Shaohua Li | b913100 | 2005-03-19 00:16:18 -0500 | [diff] [blame] | 290 | |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 291 | void acpi_pci_add_bus(struct pci_bus *bus) |
| 292 | { |
Rafael J. Wysocki | be1c9de | 2013-07-13 23:27:23 +0200 | [diff] [blame] | 293 | if (acpi_pci_disabled || !bus->bridge) |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 294 | return; |
| 295 | |
Rafael J. Wysocki | be1c9de | 2013-07-13 23:27:23 +0200 | [diff] [blame] | 296 | acpi_pci_slot_enumerate(bus); |
| 297 | acpiphp_enumerate_slots(bus); |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | void acpi_pci_remove_bus(struct pci_bus *bus) |
| 301 | { |
Rafael J. Wysocki | be1c9de | 2013-07-13 23:27:23 +0200 | [diff] [blame] | 302 | if (acpi_pci_disabled || !bus->bridge) |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 303 | return; |
| 304 | |
Jiang Liu | 3b63aaa | 2013-04-12 05:44:26 +0000 | [diff] [blame] | 305 | acpiphp_remove_slots(bus); |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 306 | acpi_pci_slot_remove(bus); |
Jiang Liu | 5090d4a | 2013-04-12 05:44:21 +0000 | [diff] [blame] | 307 | } |
| 308 | |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 309 | /* ACPI bus type */ |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 310 | static int acpi_pci_find_device(struct device *dev, acpi_handle *handle) |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 311 | { |
Rafael J. Wysocki | 60f75b8 | 2013-08-07 22:55:00 +0200 | [diff] [blame] | 312 | struct pci_dev *pci_dev = to_pci_dev(dev); |
| 313 | bool is_bridge; |
| 314 | u64 addr; |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 315 | |
Rafael J. Wysocki | 60f75b8 | 2013-08-07 22:55:00 +0200 | [diff] [blame] | 316 | /* |
| 317 | * pci_is_bridge() is not suitable here, because pci_dev->subordinate |
| 318 | * is set only after acpi_pci_find_device() has been called for the |
| 319 | * given device. |
| 320 | */ |
| 321 | is_bridge = pci_dev->hdr_type == PCI_HEADER_TYPE_BRIDGE |
| 322 | || pci_dev->hdr_type == PCI_HEADER_TYPE_CARDBUS; |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 323 | /* Please ref to ACPI spec for the syntax of _ADR */ |
| 324 | addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); |
Rafael J. Wysocki | 60f75b8 | 2013-08-07 22:55:00 +0200 | [diff] [blame] | 325 | *handle = acpi_find_child(ACPI_HANDLE(dev->parent), addr, is_bridge); |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 326 | if (!*handle) |
| 327 | return -ENODEV; |
| 328 | return 0; |
| 329 | } |
| 330 | |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 331 | static void pci_acpi_setup(struct device *dev) |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 332 | { |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 333 | struct pci_dev *pci_dev = to_pci_dev(dev); |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 334 | acpi_handle handle = ACPI_HANDLE(dev); |
| 335 | struct acpi_device *adev; |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 336 | |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 337 | if (acpi_bus_get_device(handle, &adev) || !adev->wakeup.flags.valid) |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 338 | return; |
| 339 | |
| 340 | device_set_wakeup_capable(dev, true); |
| 341 | acpi_pci_sleep_wake(pci_dev, false); |
| 342 | |
| 343 | pci_acpi_add_pm_notifier(adev, pci_dev); |
| 344 | if (adev->wakeup.flags.run_wake) |
| 345 | device_set_run_wake(dev, true); |
| 346 | } |
| 347 | |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 348 | static void pci_acpi_cleanup(struct device *dev) |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 349 | { |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 350 | acpi_handle handle = ACPI_HANDLE(dev); |
| 351 | struct acpi_device *adev; |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 352 | |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 353 | if (!acpi_bus_get_device(handle, &adev) && adev->wakeup.flags.valid) { |
Rafael J. Wysocki | d2e5f0c | 2012-12-23 00:02:44 +0100 | [diff] [blame] | 354 | device_set_wakeup_capable(dev, false); |
| 355 | device_set_run_wake(dev, false); |
| 356 | pci_acpi_remove_pm_notifier(adev); |
| 357 | } |
| 358 | } |
| 359 | |
Rafael J. Wysocki | 5354009 | 2013-03-03 22:35:20 +0100 | [diff] [blame] | 360 | static bool pci_acpi_bus_match(struct device *dev) |
| 361 | { |
| 362 | return dev->bus == &pci_bus_type; |
| 363 | } |
| 364 | |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 365 | static struct acpi_bus_type acpi_pci_bus = { |
Rafael J. Wysocki | 5354009 | 2013-03-03 22:35:20 +0100 | [diff] [blame] | 366 | .name = "PCI", |
| 367 | .match = pci_acpi_bus_match, |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 368 | .find_device = acpi_pci_find_device, |
Rafael J. Wysocki | 38a9a67 | 2012-12-23 00:02:54 +0100 | [diff] [blame] | 369 | .setup = pci_acpi_setup, |
| 370 | .cleanup = pci_acpi_cleanup, |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 371 | }; |
| 372 | |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 373 | static int __init acpi_pci_init(void) |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 374 | { |
| 375 | int ret; |
| 376 | |
Bob Moore | 993958f | 2009-02-03 15:14:33 +0800 | [diff] [blame] | 377 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) { |
Yijing Wang | e7d4515 | 2013-05-28 16:03:46 +0800 | [diff] [blame] | 378 | pr_info("ACPI FADT declares the system doesn't support MSI, so disable it\n"); |
Shaohua Li | f8993af | 2007-04-25 11:05:12 +0800 | [diff] [blame] | 379 | pci_no_msi(); |
| 380 | } |
Shaohua Li | 5fde244 | 2008-07-23 10:32:24 +0800 | [diff] [blame] | 381 | |
Bob Moore | 993958f | 2009-02-03 15:14:33 +0800 | [diff] [blame] | 382 | if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { |
Yijing Wang | e7d4515 | 2013-05-28 16:03:46 +0800 | [diff] [blame] | 383 | pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n"); |
Shaohua Li | 5fde244 | 2008-07-23 10:32:24 +0800 | [diff] [blame] | 384 | pcie_no_aspm(); |
| 385 | } |
| 386 | |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 387 | ret = register_acpi_bus_type(&acpi_pci_bus); |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 388 | if (ret) |
| 389 | return 0; |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 390 | |
Rafael J. Wysocki | 961d912 | 2008-07-07 03:32:02 +0200 | [diff] [blame] | 391 | pci_set_platform_pm(&acpi_pci_platform_pm); |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 392 | acpi_pci_slot_init(); |
Jiang Liu | 3b63aaa | 2013-04-12 05:44:26 +0000 | [diff] [blame] | 393 | acpiphp_init(); |
Jiang Liu | 5c0b04e | 2013-04-12 05:44:24 +0000 | [diff] [blame] | 394 | |
David Shaohua Li | 84df749f | 2005-03-18 18:53:36 -0500 | [diff] [blame] | 395 | return 0; |
| 396 | } |
Muthu Kumar | 9c273b9 | 2006-04-28 00:42:21 -0700 | [diff] [blame] | 397 | arch_initcall(acpi_pci_init); |