Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 2 | * processor_driver.c - ACPI Processor Driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> |
| 7 | * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> |
| 8 | * - Added processor hotplug support |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 9 | * Copyright (C) 2013, Intel Corporation |
| 10 | * Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * |
| 12 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or (at |
| 17 | * your option) any later version. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, but |
| 20 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | * General Public License for more details. |
| 23 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | */ |
| 26 | |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/cpufreq.h> |
| 31 | #include <linux/cpu.h> |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 32 | #include <linux/cpuidle.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 33 | #include <linux/slab.h> |
Toshi Kani | 47db454 | 2012-11-20 23:42:27 +0000 | [diff] [blame] | 34 | #include <linux/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <acpi/processor.h> |
| 37 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 38 | #include "internal.h" |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 |
| 41 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 42 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Alex Chiang | 0131aa3 | 2010-02-22 12:11:08 -0700 | [diff] [blame] | 45 | ACPI_MODULE_NAME("processor_driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 47 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 48 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | MODULE_LICENSE("GPL"); |
| 50 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 51 | static int acpi_processor_start(struct device *dev); |
| 52 | static int acpi_processor_stop(struct device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 54 | static const struct acpi_device_id processor_device_ids[] = { |
Myron Stowe | ad93a76 | 2008-11-04 14:52:55 -0700 | [diff] [blame] | 55 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
Toshi Kani | 9f324bd | 2012-03-19 13:08:02 -0600 | [diff] [blame] | 56 | {ACPI_PROCESSOR_DEVICE_HID, 0}, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 57 | {"", 0}, |
| 58 | }; |
| 59 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 60 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 61 | static struct device_driver acpi_processor_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 62 | .name = "processor", |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 63 | .bus = &cpu_subsys, |
| 64 | .acpi_match_table = processor_device_ids, |
| 65 | .probe = acpi_processor_start, |
| 66 | .remove = acpi_processor_stop, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | }; |
| 68 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 69 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 71 | struct acpi_device *device = data; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 72 | struct acpi_processor *pr; |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 73 | int saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 75 | if (device->handle != handle) |
| 76 | return; |
| 77 | |
| 78 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 80 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | switch (event) { |
| 83 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 84 | saved = pr->performance_platform_limit; |
Zhao Yakui | d81c45e1 | 2009-10-16 09:20:41 +0800 | [diff] [blame] | 85 | acpi_processor_ppc_has_changed(pr, 1); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 86 | if (saved == pr->performance_platform_limit) |
| 87 | break; |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 88 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 89 | dev_name(&device->dev), event, |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 90 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | break; |
| 92 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 93 | acpi_processor_cst_has_changed(pr); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 94 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 95 | dev_name(&device->dev), event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | break; |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 97 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
| 98 | acpi_processor_tstate_has_changed(pr); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 99 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 100 | dev_name(&device->dev), event, 0); |
Alan Cox | 879dca0 | 2012-10-26 01:05:56 +0200 | [diff] [blame] | 101 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | default: |
| 103 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 104 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | break; |
| 106 | } |
| 107 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 108 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
Paul Gortmaker | fe7bf10 | 2013-06-19 14:30:58 -0400 | [diff] [blame] | 111 | static int __acpi_processor_start(struct acpi_device *device); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 112 | |
Paul Gortmaker | fe7bf10 | 2013-06-19 14:30:58 -0400 | [diff] [blame] | 113 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 114 | unsigned long action, void *hcpu) |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 115 | { |
| 116 | unsigned int cpu = (unsigned long)hcpu; |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 117 | struct acpi_processor *pr = per_cpu(processors, cpu); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 118 | struct acpi_device *device; |
Lan Tianyu | ea9c167 | 2014-07-31 22:28:50 +0800 | [diff] [blame] | 119 | action &= ~CPU_TASKS_FROZEN; |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 120 | |
Toshi Kani | 8da8373 | 2014-05-08 07:58:59 -0600 | [diff] [blame] | 121 | /* |
| 122 | * CPU_STARTING and CPU_DYING must not sleep. Return here since |
| 123 | * acpi_bus_get_device() may sleep. |
| 124 | */ |
| 125 | if (action == CPU_STARTING || action == CPU_DYING) |
| 126 | return NOTIFY_DONE; |
| 127 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 128 | if (!pr || acpi_bus_get_device(pr->handle, &device)) |
| 129 | return NOTIFY_DONE; |
| 130 | |
| 131 | if (action == CPU_ONLINE) { |
| 132 | /* |
| 133 | * CPU got physically hotplugged and onlined for the first time: |
| 134 | * Initialize missing things. |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 135 | */ |
| 136 | if (pr->flags.need_hotplug_init) { |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 137 | int ret; |
| 138 | |
Toshi Kani | 47db454 | 2012-11-20 23:42:27 +0000 | [diff] [blame] | 139 | pr_info("Will online and init hotplugged CPU: %d\n", |
| 140 | pr->id); |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 141 | pr->flags.need_hotplug_init = 0; |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 142 | ret = __acpi_processor_start(device); |
| 143 | WARN(ret, "Failed to start CPU: %d\n", pr->id); |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 144 | } else { |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 145 | /* Normal CPU soft online event. */ |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 146 | acpi_processor_ppc_has_changed(pr, 0); |
Feng Tang | b7db60f | 2012-07-31 12:44:43 +0800 | [diff] [blame] | 147 | acpi_processor_hotplug(pr); |
Thomas Renninger | 99b7250 | 2012-01-19 18:18:43 +0100 | [diff] [blame] | 148 | acpi_processor_reevaluate_tstate(pr, action); |
| 149 | acpi_processor_tstate_has_changed(pr); |
| 150 | } |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 151 | } else if (action == CPU_DEAD) { |
| 152 | /* Invalidate flag.throttling after the CPU is offline. */ |
Zhao Yakui | 5a344a5 | 2011-01-10 16:35:45 +0800 | [diff] [blame] | 153 | acpi_processor_reevaluate_tstate(pr, action); |
| 154 | } |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 155 | return NOTIFY_OK; |
| 156 | } |
| 157 | |
Mathias Krause | 8ce344c | 2015-07-19 18:50:38 +0200 | [diff] [blame] | 158 | static struct notifier_block acpi_cpu_notifier = { |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 159 | .notifier_call = acpi_cpu_soft_notify, |
| 160 | }; |
| 161 | |
Ashwin Chaugule | 239708a | 2015-08-05 09:40:25 -0400 | [diff] [blame] | 162 | #ifdef CONFIG_ACPI_CPU_FREQ_PSS |
| 163 | static int acpi_pss_perf_init(struct acpi_processor *pr, |
| 164 | struct acpi_device *device) |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 165 | { |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 166 | int result = 0; |
| 167 | |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 168 | acpi_processor_ppc_has_changed(pr, 0); |
Ashwin Chaugule | 239708a | 2015-08-05 09:40:25 -0400 | [diff] [blame] | 169 | |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 170 | acpi_processor_get_throttling_info(pr); |
Lan Tianyu | 22e7551 | 2013-08-13 12:11:22 +0200 | [diff] [blame] | 171 | |
| 172 | if (pr->flags.throttling) |
| 173 | pr->flags.limit = 1; |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 174 | |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 175 | pr->cdev = thermal_cooling_device_register("Processor", device, |
| 176 | &processor_cooling_ops); |
| 177 | if (IS_ERR(pr->cdev)) { |
| 178 | result = PTR_ERR(pr->cdev); |
Ashwin Chaugule | 239708a | 2015-08-05 09:40:25 -0400 | [diff] [blame] | 179 | return result; |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | dev_dbg(&device->dev, "registered as cooling_device%d\n", |
| 183 | pr->cdev->id); |
| 184 | |
| 185 | result = sysfs_create_link(&device->dev.kobj, |
| 186 | &pr->cdev->device.kobj, |
| 187 | "thermal_cooling"); |
| 188 | if (result) { |
Toshi Kani | 47db454 | 2012-11-20 23:42:27 +0000 | [diff] [blame] | 189 | dev_err(&device->dev, |
| 190 | "Failed to create sysfs link 'thermal_cooling'\n"); |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 191 | goto err_thermal_unregister; |
| 192 | } |
Ashwin Chaugule | 239708a | 2015-08-05 09:40:25 -0400 | [diff] [blame] | 193 | |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 194 | result = sysfs_create_link(&pr->cdev->device.kobj, |
| 195 | &device->dev.kobj, |
| 196 | "device"); |
| 197 | if (result) { |
Toshi Kani | 47db454 | 2012-11-20 23:42:27 +0000 | [diff] [blame] | 198 | dev_err(&pr->cdev->device, |
| 199 | "Failed to create sysfs link 'device'\n"); |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 200 | goto err_remove_sysfs_thermal; |
| 201 | } |
| 202 | |
Srinivas Pandruvada | ce360db | 2015-12-16 20:32:23 -0800 | [diff] [blame] | 203 | return 0; |
| 204 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 205 | err_remove_sysfs_thermal: |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 206 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 207 | err_thermal_unregister: |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 208 | thermal_cooling_device_unregister(pr->cdev); |
Ashwin Chaugule | 239708a | 2015-08-05 09:40:25 -0400 | [diff] [blame] | 209 | |
| 210 | return result; |
| 211 | } |
| 212 | |
| 213 | static void acpi_pss_perf_exit(struct acpi_processor *pr, |
| 214 | struct acpi_device *device) |
| 215 | { |
| 216 | if (pr->cdev) { |
| 217 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 218 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); |
| 219 | thermal_cooling_device_unregister(pr->cdev); |
| 220 | pr->cdev = NULL; |
| 221 | } |
| 222 | } |
| 223 | #else |
| 224 | static inline int acpi_pss_perf_init(struct acpi_processor *pr, |
| 225 | struct acpi_device *device) |
| 226 | { |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static inline void acpi_pss_perf_exit(struct acpi_processor *pr, |
| 231 | struct acpi_device *device) {} |
| 232 | #endif /* CONFIG_ACPI_CPU_FREQ_PSS */ |
| 233 | |
| 234 | static int __acpi_processor_start(struct acpi_device *device) |
| 235 | { |
| 236 | struct acpi_processor *pr = acpi_driver_data(device); |
| 237 | acpi_status status; |
| 238 | int result = 0; |
| 239 | |
| 240 | if (!pr) |
| 241 | return -ENODEV; |
| 242 | |
| 243 | if (pr->flags.need_hotplug_init) |
| 244 | return 0; |
| 245 | |
Ashwin Chaugule | 4f2f757 | 2015-09-09 16:27:07 -0400 | [diff] [blame] | 246 | result = acpi_cppc_processor_probe(pr); |
| 247 | if (result) |
| 248 | return -ENODEV; |
| 249 | |
Ashwin Chaugule | 239708a | 2015-08-05 09:40:25 -0400 | [diff] [blame] | 250 | if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver) |
| 251 | acpi_processor_power_init(pr); |
| 252 | |
| 253 | result = acpi_pss_perf_init(pr, device); |
| 254 | if (result) |
| 255 | goto err_power_exit; |
| 256 | |
| 257 | status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
| 258 | acpi_processor_notify, device); |
| 259 | if (ACPI_SUCCESS(status)) |
| 260 | return 0; |
| 261 | |
| 262 | err_power_exit: |
Daniel Lezcano | 38a991b | 2012-09-15 22:42:54 +0200 | [diff] [blame] | 263 | acpi_processor_power_exit(pr); |
Thomas Renninger | 54d5dcc | 2012-01-19 18:18:42 +0100 | [diff] [blame] | 264 | return result; |
| 265 | } |
| 266 | |
Paul Gortmaker | fe7bf10 | 2013-06-19 14:30:58 -0400 | [diff] [blame] | 267 | static int acpi_processor_start(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | { |
Lan Tianyu | d0a7edb | 2013-12-06 15:36:26 +0800 | [diff] [blame] | 269 | struct acpi_device *device = ACPI_COMPANION(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
Lan Tianyu | d0a7edb | 2013-12-06 15:36:26 +0800 | [diff] [blame] | 271 | if (!device) |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 272 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 274 | return __acpi_processor_start(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 277 | static int acpi_processor_stop(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
Lan Tianyu | d0a7edb | 2013-12-06 15:36:26 +0800 | [diff] [blame] | 279 | struct acpi_device *device = ACPI_COMPANION(dev); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 280 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Lan Tianyu | d0a7edb | 2013-12-06 15:36:26 +0800 | [diff] [blame] | 282 | if (!device) |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 283 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 285 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
| 286 | acpi_processor_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 288 | pr = acpi_driver_data(device); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 289 | if (!pr) |
| 290 | return 0; |
Daniel Lezcano | 38a991b | 2012-09-15 22:42:54 +0200 | [diff] [blame] | 291 | acpi_processor_power_exit(pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Ashwin Chaugule | 239708a | 2015-08-05 09:40:25 -0400 | [diff] [blame] | 293 | acpi_pss_perf_exit(pr, device); |
| 294 | |
Ashwin Chaugule | 4f2f757 | 2015-09-09 16:27:07 -0400 | [diff] [blame] | 295 | acpi_cppc_processor_exit(pr); |
| 296 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 297 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | /* |
| 301 | * We keep the driver loaded even when ACPI is not running. |
| 302 | * This is needed for the powernow-k8 driver, that works even without |
| 303 | * ACPI, but needs symbols from this driver |
| 304 | */ |
| 305 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 306 | static int __init acpi_processor_driver_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 308 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 310 | if (acpi_disabled) |
| 311 | return 0; |
| 312 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 313 | result = driver_register(&acpi_processor_driver); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 314 | if (result < 0) |
Deepthi Dharwar | 46bcfad | 2011-10-28 16:20:42 +0530 | [diff] [blame] | 315 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Rafael J. Wysocki | 0a3b15a | 2013-05-02 21:54:37 +0200 | [diff] [blame] | 317 | acpi_processor_syscore_init(); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 318 | register_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | acpi_thermal_cpufreq_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | acpi_processor_ppc_init(); |
Zhao Yakui | 1180509 | 2008-01-28 13:53:42 +0800 | [diff] [blame] | 321 | acpi_processor_throttling_init(); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 322 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | } |
| 324 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 325 | static void __exit acpi_processor_driver_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | { |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 327 | if (acpi_disabled) |
| 328 | return; |
| 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | acpi_processor_ppc_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | acpi_thermal_cpufreq_exit(); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 332 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
Rafael J. Wysocki | 0a3b15a | 2013-05-02 21:54:37 +0200 | [diff] [blame] | 333 | acpi_processor_syscore_exit(); |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 334 | driver_unregister(&acpi_processor_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | } |
| 336 | |
Rafael J. Wysocki | ac212b6 | 2013-05-03 00:26:22 +0200 | [diff] [blame] | 337 | module_init(acpi_processor_driver_init); |
| 338 | module_exit(acpi_processor_driver_exit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | MODULE_ALIAS("processor"); |