^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * processor_driver.c - ACPI Processor Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * - Added processor hotplug support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright (C) 2013, Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Rafael J. Wysocki <rafael.j.wysocki@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cpufreq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/cpuidle.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <acpi/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define ACPI_PROCESSOR_NOTIFY_POWER 0x81
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define _COMPONENT ACPI_PROCESSOR_COMPONENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ACPI_MODULE_NAME("processor_driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) MODULE_AUTHOR("Paul Diefenbaugh");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) MODULE_DESCRIPTION("ACPI Processor Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static int acpi_processor_start(struct device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int acpi_processor_stop(struct device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static const struct acpi_device_id processor_device_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {ACPI_PROCESSOR_OBJECT_HID, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {ACPI_PROCESSOR_DEVICE_HID, 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {"", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) MODULE_DEVICE_TABLE(acpi, processor_device_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static struct device_driver acpi_processor_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .name = "processor",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) .bus = &cpu_subsys,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .acpi_match_table = processor_device_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .probe = acpi_processor_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .remove = acpi_processor_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct acpi_device *device = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct acpi_processor *pr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int saved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (device->handle != handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) pr = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) saved = pr->performance_platform_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) acpi_processor_ppc_has_changed(pr, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (saved == pr->performance_platform_limit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) acpi_bus_generate_netlink_event(device->pnp.device_class,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) dev_name(&device->dev), event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pr->performance_platform_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) case ACPI_PROCESSOR_NOTIFY_POWER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) acpi_processor_power_state_has_changed(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) acpi_bus_generate_netlink_event(device->pnp.device_class,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) dev_name(&device->dev), event, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case ACPI_PROCESSOR_NOTIFY_THROTTLING:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) acpi_processor_tstate_has_changed(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) acpi_bus_generate_netlink_event(device->pnp.device_class,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) dev_name(&device->dev), event, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ACPI_DEBUG_PRINT((ACPI_DB_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) "Unsupported event [0x%x]\n", event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static int __acpi_processor_start(struct acpi_device *device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static int acpi_soft_cpu_online(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct acpi_processor *pr = per_cpu(processors, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct acpi_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (!pr || acpi_bus_get_device(pr->handle, &device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * CPU got physically hotplugged and onlined for the first time:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * Initialize missing things.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (pr->flags.need_hotplug_init) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) pr_info("Will online and init hotplugged CPU: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) pr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) pr->flags.need_hotplug_init = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) ret = __acpi_processor_start(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) WARN(ret, "Failed to start CPU: %d\n", pr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* Normal CPU soft online event. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) acpi_processor_ppc_has_changed(pr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) acpi_processor_hotplug(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) acpi_processor_reevaluate_tstate(pr, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) acpi_processor_tstate_has_changed(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int acpi_soft_cpu_dead(unsigned int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct acpi_processor *pr = per_cpu(processors, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct acpi_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (!pr || acpi_bus_get_device(pr->handle, &device))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) acpi_processor_reevaluate_tstate(pr, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #ifdef CONFIG_ACPI_CPU_FREQ_PSS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int acpi_pss_perf_init(struct acpi_processor *pr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) acpi_processor_ppc_has_changed(pr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) acpi_processor_get_throttling_info(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (pr->flags.throttling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) pr->flags.limit = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) pr->cdev = thermal_cooling_device_register("Processor", device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) &processor_cooling_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (IS_ERR(pr->cdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) result = PTR_ERR(pr->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) dev_dbg(&device->dev, "registered as cooling_device%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) pr->cdev->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) result = sysfs_create_link(&device->dev.kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) &pr->cdev->device.kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) "thermal_cooling");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) dev_err(&device->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) "Failed to create sysfs link 'thermal_cooling'\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) goto err_thermal_unregister;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) result = sysfs_create_link(&pr->cdev->device.kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) &device->dev.kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) "device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (result) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) dev_err(&pr->cdev->device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) "Failed to create sysfs link 'device'\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) goto err_remove_sysfs_thermal;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) err_remove_sysfs_thermal:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) err_thermal_unregister:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) thermal_cooling_device_unregister(pr->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static void acpi_pss_perf_exit(struct acpi_processor *pr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (pr->cdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) sysfs_remove_link(&pr->cdev->device.kobj, "device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) thermal_cooling_device_unregister(pr->cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) pr->cdev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static inline int acpi_pss_perf_init(struct acpi_processor *pr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static inline void acpi_pss_perf_exit(struct acpi_processor *pr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) struct acpi_device *device) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #endif /* CONFIG_ACPI_CPU_FREQ_PSS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int __acpi_processor_start(struct acpi_device *device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct acpi_processor *pr = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (pr->flags.need_hotplug_init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) result = acpi_cppc_processor_probe(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (result && !IS_ENABLED(CONFIG_ACPI_CPU_FREQ_PSS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) dev_dbg(&device->dev, "CPPC data invalid or not present\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (!cpuidle_get_driver() || cpuidle_get_driver() == &acpi_idle_driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) acpi_processor_power_init(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) result = acpi_pss_perf_init(pr, device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) goto err_power_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) acpi_processor_notify, device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (ACPI_SUCCESS(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) result = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) acpi_pss_perf_exit(pr, device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) err_power_exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) acpi_processor_power_exit(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static int acpi_processor_start(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct acpi_device *device = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) /* Protect against concurrent CPU hotplug operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) cpu_hotplug_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) ret = __acpi_processor_start(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) cpu_hotplug_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static int acpi_processor_stop(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct acpi_device *device = ACPI_COMPANION(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) struct acpi_processor *pr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) acpi_processor_notify);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) pr = acpi_driver_data(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (!pr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) acpi_processor_power_exit(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) acpi_pss_perf_exit(pr, device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) acpi_cppc_processor_exit(pr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) bool acpi_processor_cpufreq_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) static int acpi_processor_notifier(struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) unsigned long event, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct cpufreq_policy *policy = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (event == CPUFREQ_CREATE_POLICY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) acpi_thermal_cpufreq_init(policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) acpi_processor_ppc_init(policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) } else if (event == CPUFREQ_REMOVE_POLICY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) acpi_processor_ppc_exit(policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) acpi_thermal_cpufreq_exit(policy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static struct notifier_block acpi_processor_notifier_block = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) .notifier_call = acpi_processor_notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * We keep the driver loaded even when ACPI is not running.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * This is needed for the powernow-k8 driver, that works even without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * ACPI, but needs symbols from this driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static enum cpuhp_state hp_online;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static int __init acpi_processor_driver_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) int result = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (acpi_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) result = driver_register(&acpi_processor_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (result < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) result = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) "acpi/cpu-drv:online",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) acpi_soft_cpu_online, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (result < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) hp_online = result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) cpuhp_setup_state_nocalls(CPUHP_ACPI_CPUDRV_DEAD, "acpi/cpu-drv:dead",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) NULL, acpi_soft_cpu_dead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (!cpufreq_register_notifier(&acpi_processor_notifier_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) CPUFREQ_POLICY_NOTIFIER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) acpi_processor_cpufreq_init = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) acpi_processor_ignore_ppc_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) acpi_processor_throttling_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) driver_unregister(&acpi_processor_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static void __exit acpi_processor_driver_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (acpi_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (acpi_processor_cpufreq_init) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) cpufreq_unregister_notifier(&acpi_processor_notifier_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) CPUFREQ_POLICY_NOTIFIER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) acpi_processor_cpufreq_init = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) cpuhp_remove_state_nocalls(hp_online);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) cpuhp_remove_state_nocalls(CPUHP_ACPI_CPUDRV_DEAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) driver_unregister(&acpi_processor_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) module_init(acpi_processor_driver_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) module_exit(acpi_processor_driver_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) MODULE_ALIAS("processor");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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