cregit-Linux how code gets into the kernel

Release 4.14 drivers/acpi/bus.c

Directory: drivers/acpi
/*
 *  acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
 *
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/proc_fs.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <linux/regulator/machine.h>
#include <linux/workqueue.h>
#include <linux/reboot.h>
#include <linux/delay.h>
#ifdef CONFIG_X86
#include <asm/mpspec.h>
#endif
#include <linux/acpi_iort.h>
#include <linux/pci.h>
#include <acpi/apei.h>
#include <linux/dmi.h>
#include <linux/suspend.h>

#include "internal.h"


#define _COMPONENT		ACPI_BUS_COMPONENT
ACPI_MODULE_NAME("bus");


struct acpi_device *acpi_root;

struct proc_dir_entry *acpi_root_dir;

EXPORT_SYMBOL(acpi_root_dir);

#ifdef CONFIG_X86
#ifdef CONFIG_ACPI_CUSTOM_DSDT

static inline int set_copy_dsdt(const struct dmi_system_id *id) { return 0; }

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#else
static int set_copy_dsdt(const struct dmi_system_id *id) { printk(KERN_NOTICE "%s detected - " "force copy of DSDT to local memory\n", id->ident); acpi_gbl_copy_dsdt_locally = 1; return 0; }

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#endif static const struct dmi_system_id dsdt_dmi_table[] __initconst = { /* * Invoke DSDT corruption work-around on all Toshiba Satellite. * https://bugzilla.kernel.org/show_bug.cgi?id=14679 */ { .callback = set_copy_dsdt, .ident = "TOSHIBA Satellite", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), }, }, {} }; #else static const struct dmi_system_id dsdt_dmi_table[] __initconst = { {} }; #endif /* -------------------------------------------------------------------------- Device Management -------------------------------------------------------------------------- */
acpi_status acpi_bus_get_status_handle(acpi_handle handle, unsigned long long *sta) { acpi_status status; status = acpi_evaluate_integer(handle, "_STA", NULL, sta); if (ACPI_SUCCESS(status)) return AE_OK; if (status == AE_NOT_FOUND) { *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; return AE_OK; } return status; }

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int acpi_bus_get_status(struct acpi_device *device) { acpi_status status; unsigned long long sta; if (acpi_device_always_present(device)) { acpi_set_device_status(device, ACPI_STA_DEFAULT); return 0; } status = acpi_bus_get_status_handle(device->handle, &sta); if (ACPI_FAILURE(status)) return -ENODEV; acpi_set_device_status(device, sta); if (device->status.functional && !device->status.present) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " "functional but not present;\n", device->pnp.bus_id, (u32)sta)); } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", device->pnp.bus_id, (u32)sta)); return 0; }

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Len Brown2418.75%222.22%
Hans de Goede1914.84%111.11%
Yakui Zhao1410.94%111.11%
Rafael J. Wysocki53.91%111.11%
Patrick Mochel43.12%111.11%
Matthew Wilcox10.78%111.11%
Björn Helgaas10.78%111.11%
Total128100.00%9100.00%

EXPORT_SYMBOL(acpi_bus_get_status);
void acpi_bus_private_data_handler(acpi_handle handle, void *context) { return; }

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EXPORT_SYMBOL(acpi_bus_private_data_handler);
int acpi_bus_attach_private_data(acpi_handle handle, void *data) { acpi_status status; status = acpi_attach_data(handle, acpi_bus_private_data_handler, data); if (ACPI_FAILURE(status)) { acpi_handle_debug(handle, "Error attaching device data\n"); return -ENODEV; } return 0; }

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EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data);
int acpi_bus_get_private_data(acpi_handle handle, void **data) { acpi_status status; if (!*data) return -EINVAL; status = acpi_get_data(handle, acpi_bus_private_data_handler, data); if (ACPI_FAILURE(status)) { acpi_handle_debug(handle, "No context for object\n"); return -ENODEV; } return 0; }

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EXPORT_SYMBOL_GPL(acpi_bus_get_private_data);
void acpi_bus_detach_private_data(acpi_handle handle) { acpi_detach_data(handle, acpi_bus_private_data_handler); }

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EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data);
static void acpi_print_osc_error(acpi_handle handle, struct acpi_osc_context *context, char *error) { int i; acpi_handle_debug(handle, "(%s): %s\n", context->uuid_str, error); pr_debug("_OSC request data:"); for (i = 0; i < context->cap.length; i += sizeof(u32)) pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); pr_debug("\n"); }

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Andrew Lutomirski55.75%250.00%
Rafael J. Wysocki55.75%125.00%
Total87100.00%4100.00%


acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) { acpi_status status; struct acpi_object_list input; union acpi_object in_params[4]; union acpi_object *out_obj; guid_t guid; u32 errors; struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; if (!context) return AE_ERROR; if (guid_parse(context->uuid_str, &guid)) return AE_ERROR; context->ret.length = ACPI_ALLOCATE_BUFFER; context->ret.pointer = NULL; /* Setting up input parameters */ input.count = 4; input.pointer = in_params; in_params[0].type = ACPI_TYPE_BUFFER; in_params[0].buffer.length = 16; in_params[0].buffer.pointer = (u8 *)&guid; in_params[1].type = ACPI_TYPE_INTEGER; in_params[1].integer.value = context->rev; in_params[2].type = ACPI_TYPE_INTEGER; in_params[2].integer.value = context->cap.length/sizeof(u32); in_params[3].type = ACPI_TYPE_BUFFER; in_params[3].buffer.length = context->cap.length; in_params[3].buffer.pointer = context->cap.pointer; status = acpi_evaluate_object(handle, "_OSC", &input, &output); if (ACPI_FAILURE(status)) return status; if (!output.length) return AE_NULL_OBJECT; out_obj = output.pointer; if (out_obj->type != ACPI_TYPE_BUFFER || out_obj->buffer.length != context->cap.length) { acpi_print_osc_error(handle, context, "_OSC evaluation returned wrong type"); status = AE_TYPE; goto out_kfree; } /* Need to ignore the bit0 in result code */ errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); if (errors) { if (errors & OSC_REQUEST_ERROR) acpi_print_osc_error(handle, context, "_OSC request failed"); if (errors & OSC_INVALID_UUID_ERROR) acpi_print_osc_error(handle, context, "_OSC invalid UUID"); if (errors & OSC_INVALID_REVISION_ERROR) acpi_print_osc_error(handle, context, "_OSC invalid revision"); if (errors & OSC_CAPABILITIES_MASK_ERROR) { if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] & OSC_QUERY_ENABLE) goto out_success; status = AE_SUPPORT; goto out_kfree; } status = AE_ERROR; goto out_kfree; } out_success: context->ret.length = out_obj->buffer.length; context->ret.pointer = kmemdup(out_obj->buffer.pointer, context->ret.length, GFP_KERNEL); if (!context->ret.pointer) { status = AE_NO_MEMORY; goto out_kfree; } status = AE_OK; out_kfree: kfree(output.pointer); if (status != AE_OK) context->ret.pointer = NULL; return status; }

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Andrei Epure71.38%120.00%
Björn Helgaas10.20%120.00%
Total508100.00%5100.00%

EXPORT_SYMBOL(acpi_run_osc); bool osc_sb_apei_support_acked; /* * ACPI 6.0 Section 8.4.4.2 Idle State Coordination * OSPM supports platform coordinated low power idle(LPI) states */ bool osc_pc_lpi_support_confirmed; EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed); static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
static void acpi_bus_osc_support(void) { u32 capbuf[2]; struct acpi_osc_context context = { .uuid_str = sb_uuid_str, .rev = 1, .cap.length = 8, .cap.pointer = capbuf, }; acpi_handle handle; capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ if (IS_ENABLED(CONFIG_ACPI_PROCESSOR_AGGREGATOR)) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; if (IS_ENABLED(CONFIG_ACPI_PROCESSOR)) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; #ifdef CONFIG_X86 if (boot_cpu_has(X86_FEATURE_HWP)) { capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; } #endif if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; if (!ghes_disable) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) return; if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { u32 *capbuf_ret = context.ret.pointer; if (context.ret.length > OSC_SUPPORT_DWORD) { osc_sb_apei_support_acked = capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; osc_pc_lpi_support_confirmed = capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; } kfree(context.ret.pointer); } /* do we need to check other returned cap? Sounds no */ }

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Yakui Zhao114.60%110.00%
Björn Helgaas83.35%110.00%
Toshi Kani62.51%110.00%
Tim Chen10.42%110.00%
Total239100.00%10100.00%

/* -------------------------------------------------------------------------- Notification Handling -------------------------------------------------------------------------- */ /** * acpi_bus_notify * --------------- * Callback for all 'system-level' device notifications (values 0x00-0x7F). */
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) { struct acpi_device *adev; struct acpi_driver *driver; u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; bool hotplug_event = false; switch (type) { case ACPI_NOTIFY_BUS_CHECK: acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); hotplug_event = true; break; case ACPI_NOTIFY_DEVICE_CHECK: acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); hotplug_event = true; break; case ACPI_NOTIFY_DEVICE_WAKE: acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); break; case ACPI_NOTIFY_EJECT_REQUEST: acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); hotplug_event = true; break; case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); /* TBD: Exactly what does 'light' mean? */ break; case ACPI_NOTIFY_FREQUENCY_MISMATCH: acpi_handle_err(handle, "Device cannot be configured due " "to a frequency mismatch\n"); break; case ACPI_NOTIFY_BUS_MODE_MISMATCH: acpi_handle_err(handle, "Device cannot be configured due " "to a bus mode mismatch\n"); break; case ACPI_NOTIFY_POWER_FAULT: acpi_handle_err(handle, "Device has suffered a power fault\n"); break; default: acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); break; } adev = acpi_bus_get_acpi_device(handle); if (!adev) goto err; driver = adev->driver; if (driver && driver->ops.notify && (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) driver->ops.notify(adev, type); if (!hotplug_event) { acpi_bus_put_acpi_device(adev); return; } if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) return; acpi_bus_put_acpi_device(adev); err: acpi_evaluate_ost(handle, type, ost_code, NULL); }

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Andy Grover156.00%19.09%
Chun-Yi Lee124.80%19.09%
Total250100.00%11100.00%


static void acpi_device_notify(acpi_handle handle, u32 event, void *data) { struct acpi_device *device = data; device->driver->ops.notify(device, event); }

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static void acpi_device_notify_fixed(void *data) { struct acpi_device *device = data; /* Fixed hardware devices have no handles */ acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); }

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static u32 acpi_device_fixed_event(void *data) { acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); return ACPI_INTERRUPT_HANDLED; }

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static int acpi_device_install_notify_handler(struct acpi_device *device) { acpi_status status; if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) status = acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, acpi_device_fixed_event, device); else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) status = acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, acpi_device_fixed_event, device); else status = acpi_install_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, acpi_device_notify, device); if (ACPI_FAILURE(status)) return -EINVAL; return 0; }

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static void acpi_device_remove_notify_handler(struct acpi_device *device) { if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, acpi_device_fixed_event); else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, acpi_device_fixed_event); else acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, acpi_device_notify); }

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Rafael J. Wysocki54100.00%1100.00%
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/* Handle events targeting \_SB device (at present only graceful shutdown) */ #define ACPI_SB_NOTIFY_SHUTDOWN_REQUEST 0x81 #define ACPI_SB_INDICATE_INTERVAL 10000
static void sb_notify_work(struct work_struct *dummy) { acpi_handle sb_handle; orderly_poweroff(true); /* * After initiating graceful shutdown, the ACPI spec requires OSPM * to evaluate _OST method once every 10seconds to indicate that * the shutdown is in progress */ acpi_get_handle(NULL, "\\_SB", &sb_handle); while (1) { pr_info("Graceful shutdown in progress.\n"); acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); msleep(ACPI_SB_INDICATE_INTERVAL); } }

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static void acpi_sb_notify(acpi_handle handle, u32 event, void *data) { static DECLARE_WORK(acpi_sb_work, sb_notify_work); if (event == ACPI_SB_NOTIFY_SHUTDOWN_REQUEST) { if (!work_busy(&acpi_sb_work)) schedule_work(&acpi_sb_work); } else pr_warn("event %x is not supported by \\_SB device\n", event); }

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static int __init acpi_setup_sb_notify_handler(void) { acpi_handle sb_handle; if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &sb_handle))) return -ENXIO; if (ACPI_FAILURE(acpi_install_notify_handler(sb_handle, ACPI_DEVICE_NOTIFY, acpi_sb_notify, NULL))) return -EINVAL; return 0; }

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/* -------------------------------------------------------------------------- Device Matching -------------------------------------------------------------------------- */ /** * acpi_get_first_physical_node - Get first physical node of an ACPI device * @adev: ACPI device in question * * Return: First physical node of ACPI device @adev */
struct device *acpi_get_first_physical_node(struct acpi_device *adev) { struct mutex *physical_node_lock = &adev->physical_node_lock; struct device *phys_dev; mutex_lock(physical_node_lock); if (list_empty(&adev->physical_node_list)) { phys_dev = NULL; } else { const struct acpi_device_physical_node *node; node = list_first_entry(&adev->physical_node_list, struct acpi_device_physical_node, node); phys_dev = node->dev; } mutex_unlock(physical_node_lock); return phys_dev; }

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Aleksey Makarov1315.12%125.00%
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static struct acpi_device *acpi_primary_dev_companion(struct acpi_device *adev, const struct device *dev) { const struct device *phys_dev = acpi_get_first_physical_node(adev); return phys_dev && phys_dev == dev ? adev : NULL; }

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Aleksey Makarov3892.68%150.00%
Rafael J. Wysocki37.32%150.00%
Total41100.00%2100.00%

/** * acpi_device_is_first_physical_node - Is given dev first physical node * @adev: ACPI companion device * @dev: Physical device to check * * Function checks if given @dev is the first physical devices attached to * the ACPI companion device. This distinction is needed in some cases * where the same companion device is shared between many physical devices. * * Note that the caller have to provide valid @adev pointer. */
bool acpi_device_is_first_physical_node(struct acpi_device *adev, const struct device *dev) { return !!acpi_primary_dev_companion(adev, dev); }

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Rafael J. Wysocki26100.00%2100.00%
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/* * acpi_companion_match() - Can we match via ACPI companion device * @dev: Device in question * * Check if the given device has an ACPI companion and if that companion has * a valid list of PNP IDs, and if the device is the first (primary) physical * device associated with it. Return the companion pointer if that's the case * or NULL otherwise. * * If multiple physical devices are attached to a single ACPI companion, we need * to be careful. The usage scenario for this kind of relationship is that all * of the physical devices in question use resources provided by the ACPI * companion. A typical case is an MFD device where all the sub-devices share * the parent's ACPI companion. In such cases we can only allow the primary * (first) physical device to be matched with the help of the companion's PNP * IDs. * * Additional physical devices sharing the ACPI companion can still use * resources available from it but they will be matched normally using functions * provided by their bus types (and analogously for their modalias). */
struct acpi_device *acpi_companion_match(const struct device *dev) { struct acpi_device *adev; adev = ACPI_COMPANION(dev); if (!adev) return NULL; if (list_empty(&adev->pnp.ids)) return NULL; return acpi_primary_dev_companion(adev, dev); }

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Rafael J. Wysocki56100.00%2100.00%
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/** * acpi_of_match_device - Match device object using the "compatible" property. * @adev: ACPI device object to match. * @of_match_table: List of device IDs to match against. * * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of * identifiers and a _DSD object with the "compatible" property, use that * property to match against the given list of identifiers. */
static bool acpi_of_match_device(struct acpi_device *adev, const struct of_device_id *of_match_table) { const union acpi_object *of_compatible, *obj; int i, nval; if (!adev) return false; of_compatible = adev->data.of_compatible; if (!of_match_table || !of_compatible) return false; if (of_compatible->type == ACPI_TYPE_PACKAGE) { nval = of_compatible->package.count; obj = of_compatible->package.elements; } else { /* Must be ACPI_TYPE_STRING. */ nval = 1; obj = of_compatible; } /* Now we can look for the driver DT compatible strings */ for (i = 0; i < nval; i++, obj++) { const struct of_device_id *id; for (id = of_match_table; id->compatible[0]; id++) if (!strcasecmp(obj->string.pointer, id->compatible)) return true; } return false; }

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Rafael J. Wysocki159100.00%1100.00%
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static bool acpi_of_modalias(struct acpi_device *adev, char *modalias, size_t len) { const union acpi_object *of_compatible; const union acpi_object *obj; const char *str, *chr; of_compatible = adev->data.of_compatible; if (!of_compatible) return false; if (of_compatible->type == ACPI_TYPE_PACKAGE) obj = of_compatible->package.elements; else /* Must be ACPI_TYPE_STRING. */ obj = of_compatible; str = obj->string.pointer; chr = strchr(str, ','); strlcpy(modalias, chr ? chr + 1 : str, len); return true; }

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Dan O'Donovan111100.00%1100.00%
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/** * acpi_set_modalias - Set modalias using "compatible" property or supplied ID * @adev: ACPI device object to match * @default_id: ID string to use as default if no compatible string found * @modalias: Pointer to buffer that modalias value will be copied into * @len: Length of modalias buffer * * This is a counterpart of of_modalias_node() for struct acpi_device objects. * If there is a compatible string for @adev, it will be copied to @modalias * with the vendor prefix stripped; otherwise, @default_id will be used. */
void acpi_set_modalias(struct acpi_device *adev, const char *default_id, char *modalias, size_t len) { if (!acpi_of_modalias(adev, modalias, len)) strlcpy(modalias, default_id, len); }

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EXPORT_SYMBOL_GPL(acpi_set_modalias);
static bool __acpi_match_device_cls(const struct acpi_device_id *id, struct acpi_hardware_id *hwid) { int i, msk, byte_shift; char buf[3]; if (!id->cls) return false; /* Apply class-code bitmask, before checking each class-code byte */ for (i = 1; i <= 3; i++) { byte_shift = 8 * (3 - i); msk = (id->cls_msk >> byte_shift) & 0xFF; if (!msk) continue; sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) return false; } return true; }

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Rafael J. Wysocki130100.00%1100.00%
Total130100.00%1100.00%


static const struct acpi_device_id *__acpi_match_device( struct acpi_device *device, const struct acpi_device_id *ids, const struct of_device_id *of_ids) { const struct acpi_device_id *id; struct acpi_hardware_id *hwid; /* * If the device is not present, it is unnecessary to load device * driver for it. */ if (!device || !device->status.present) return NULL; list_for_each_entry(hwid, &device->pnp.ids, list) { /* First, check the ACPI/PNP IDs provided by the caller. */ for (id = ids; id->id[0] || id->cls; id++) { if (id->id[0] && !strcmp((char *) id->id, hwid->id)) return id; else if (id->cls && __acpi_match_device_cls(id, hwid)) return id; } /* * Next, check ACPI_DT_NAMESPACE_HID and try to match the * "compatible" property if found. * * The id returned by the below is not valid, but the only * caller passing non-NULL of_ids here is only interested in * whether or not the return value is NULL. */ if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id) && acpi_of_match_device(device, of_ids)) return id; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki157100.00%1100.00%
Total157100.00%1100.00%

/** * acpi_match_device - Match a struct device against a given list of ACPI IDs * @ids: Array of struct acpi_device_id object to match against. * @dev: The device structure to match. * * Check if @dev has a valid ACPI handle and if there is a struct acpi_device * object for that handle and use that object to match against a given list of * device IDs. * * Return a pointer to the first matching ID on success or %NULL on failure. */
const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, const struct device *dev) { return __acpi_match_device(acpi_companion_match(dev), ids, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki33100.00%1100.00%
Total33100.00%1100.00%

EXPORT_SYMBOL_GPL(acpi_match_device);
int acpi_match_device_ids(struct acpi_device *device, const struct acpi_device_id *ids) { return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT; }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki31100.00%1100.00%
Total31100.00%1100.00%

EXPORT_SYMBOL(acpi_match_device_ids);
bool acpi_driver_match_device(struct device *dev, const struct device_driver *drv) { if (!drv->acpi_match_table) return acpi_of_match_device(ACPI_COMPANION(dev), drv->of_match_table); return !!__acpi_match_device(acpi_companion_match(dev), drv->acpi_match_table, drv->of_match_table); }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki55100.00%1100.00%
Total55100.00%1100.00%

EXPORT_SYMBOL_GPL(acpi_driver_match_device); /* -------------------------------------------------------------------------- ACPI Driver Management -------------------------------------------------------------------------- */ /** * acpi_bus_register_driver - register a driver with the ACPI bus * @driver: driver being registered * * Registers a driver with the ACPI bus. Searches the namespace for all * devices that match the driver's criteria and binds. Returns zero for * success or a negative error status for failure. */
int acpi_bus_register_driver(struct acpi_driver *driver) { int ret; if (acpi_disabled) return -ENODEV; driver->drv.name = driver->name; driver->drv.bus = &acpi_bus_type; driver->drv.owner = driver->owner; ret = driver_register(&driver->drv); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki63100.00%1100.00%
Total63100.00%1100.00%

EXPORT_SYMBOL(acpi_bus_register_driver); /** * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus * @driver: driver to unregister * * Unregisters a driver with the ACPI bus. Searches the namespace for all * devices that match the driver's criteria and unbinds. */
void acpi_bus_unregister_driver(struct acpi_driver *driver) { driver_unregister(&driver->drv); }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki18100.00%1100.00%
Total18100.00%1100.00%

EXPORT_SYMBOL(acpi_bus_unregister_driver); /* -------------------------------------------------------------------------- ACPI Bus operations -------------------------------------------------------------------------- */
static int acpi_bus_match(struct device *dev, struct device_driver *drv) { struct acpi_device *acpi_dev = to_acpi_device(dev); struct acpi_driver *acpi_drv = to_acpi_driver(drv); return acpi_dev->flags.match_driver && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki53100.00%1100.00%
Total53100.00%1100.00%


static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) { return __acpi_device_uevent_modalias(to_acpi_device(dev), env); }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki27100.00%1100.00%
Total27100.00%1100.00%


static int acpi_device_probe(struct device *dev) { struct acpi_device *acpi_dev = to_acpi_device(dev); struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); int ret; if (acpi_dev->handler && !acpi_is_pnp_device(acpi_dev)) return -EINVAL; if (!acpi_drv->ops.add) return -ENOSYS; ret = acpi_drv->ops.add(acpi_dev); if (ret) return ret; acpi_dev->driver = acpi_drv; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Driver [%s] successfully bound to device [%s]\n", acpi_drv->name, acpi_dev->pnp.bus_id)); if (acpi_drv->ops.notify) { ret = acpi_device_install_notify_handler(acpi_dev); if (ret) { if (acpi_drv->ops.remove) acpi_drv->ops.remove(acpi_dev); acpi_dev->driver = NULL; acpi_dev->driver_data = NULL; return ret; } } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found driver [%s] for device [%s]\n", acpi_drv->name, acpi_dev->pnp.bus_id)); get_device(dev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki190100.00%1100.00%
Total190100.00%1100.00%


static int acpi_device_remove(struct device * dev) { struct acpi_device *acpi_dev = to_acpi_device(dev); struct acpi_driver *acpi_drv = acpi_dev->driver; if (acpi_drv) { if (acpi_drv->ops.notify) acpi_device_remove_notify_handler(acpi_dev); if (acpi_drv->ops.remove) acpi_drv->ops.remove(acpi_dev); } acpi_dev->driver = NULL; acpi_dev->driver_data = NULL; put_device(dev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki86100.00%1100.00%
Total86100.00%1100.00%

struct bus_type acpi_bus_type = { .name = "acpi", .match = acpi_bus_match, .probe = acpi_device_probe, .remove = acpi_device_remove, .uevent = acpi_device_uevent, }; /* -------------------------------------------------------------------------- Initialization/Cleanup -------------------------------------------------------------------------- */
static int __init acpi_bus_init_irq(void) { acpi_status status; char *message = NULL; /* * Let the system know what interrupt model we are using by * evaluating the \_PIC object, if exists. */ switch (acpi_irq_model) { case ACPI_IRQ_MODEL_PIC: message = "PIC"; break; case ACPI_IRQ_MODEL_IOAPIC: message = "IOAPIC"; break; case ACPI_IRQ_MODEL_IOSAPIC: message = "IOSAPIC"; break; case ACPI_IRQ_MODEL_GIC: message = "GIC"; break; case ACPI_IRQ_MODEL_PLATFORM: message = "platform specific model"; break; default: printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); return -ENODEV; } printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); return -ENODEV; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover9876.56%333.33%
Hanjun Guo86.25%111.11%
John Keller86.25%111.11%
Patrick Mochel64.69%111.11%
Thomas Renninger53.91%111.11%
Jiang Liu21.56%111.11%
Alexey Y. Starikovskiy10.78%111.11%
Total128100.00%9100.00%

/** * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. * * The ACPI tables are accessible after this, but the handling of events has not * been initialized and the global lock is not available yet, so AML should not * be executed at this point. * * Doing this before switching the EFI runtime services to virtual mode allows * the EfiBootServices memory to be freed slightly earlier on boot. */
void __init acpi_early_init(void) { acpi_status status; if (acpi_disabled) return; printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); /* enable workarounds, unless strict ACPI spec. compliance */ if (!acpi_strict) acpi_gbl_enable_interpreter_slack = TRUE; acpi_permanent_mmap = true; /* * If the machine falls into the DMI check table, * DSDT will be copied to memory */ dmi_check_system(dsdt_dmi_table); status = acpi_reallocate_root_table(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to reallocate ACPI tables\n"); goto error0; } status = acpi_initialize_subsystem(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to initialize the ACPI Interpreter\n"); goto error0; } if (!acpi_gbl_parse_table_as_term_list && acpi_gbl_group_module_level_code) { status = acpi_load_tables(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to load the System Description Tables\n"); goto error0; } } #ifdef CONFIG_X86 if (!acpi_ioapic) { /* compatible (0) means level (3) */ if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; } /* Set PIC-mode SCI trigger type */ acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); } else { /* * now that acpi_gbl_FADT is initialized, * update it with result from INT_SRC_OVR parsing */ acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; } #endif return; error0: disable_acpi(); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover7339.04%421.05%
Len Brown4725.13%526.32%
Alexey Y. Starikovskiy3418.18%315.79%
Lv Zheng115.88%315.79%
Robert Moore84.28%15.26%
Rafael J. Wysocki73.74%15.26%
Lin Ming63.21%15.26%
Patrick Mochel10.53%15.26%
Total187100.00%19100.00%

/** * acpi_subsystem_init - Finalize the early initialization of ACPI. * * Switch over the platform to the ACPI mode (if possible). * * Doing this too early is generally unsafe, but at the same time it needs to be * done before all things that really depend on ACPI. The right spot appears to * be before finalizing the EFI initialization. */
void __init acpi_subsystem_init(void) { acpi_status status; if (acpi_disabled) return; status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); disable_acpi(); } else { /* * If the system is using ACPI then we can be reasonably * confident that any regulators are managed by the firmware * so tell the regulator core it has everything it needs to * know. */ regulator_has_full_constraints(); } }

Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki2244.90%125.00%
Len Brown2142.86%125.00%
Andy Grover48.16%125.00%
Mark Brown24.08%125.00%
Total49100.00%4100.00%


static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context) { acpi_scan_table_handler(event, table, context); return acpi_sysfs_table_handler(event, table, context); }

Contributors

PersonTokensPropCommitsCommitProp
Octavian Purdila36100.00%1100.00%
Total36100.00%1100.00%


static int __init acpi_bus_init(void) { int result; acpi_status status; acpi_os_initialize1(); /* * ACPI 2.0 requires the EC driver to be loaded and work before * the EC device is found in the namespace (i.e. before * acpi_load_tables() is called). * * This is accomplished by looking for the ECDT table, and getting * the EC parameters out of that. */ status = acpi_ec_ecdt_probe(); /* Ignore result. Not having an ECDT is not fatal. */ if (acpi_gbl_parse_table_as_term_list || !acpi_gbl_group_module_level_code) { status = acpi_load_tables(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to load the System Description Tables\n"); goto error1; } } status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to start the ACPI Interpreter\n"); goto error1; } status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); goto error1; } /* Set capability bits for _OSC under processor scope */ acpi_early_processor_osc(); /* * _OSC method may exist in module level code, * so it must be run after ACPI_FULL_INITIALIZATION */ acpi_bus_osc_support(); /* * _PDC control method may load dynamic SSDT tables, * and we need to install the table handler before that. */ status = acpi_install_table_handler(acpi_bus_table_handler, NULL); acpi_sysfs_init(); acpi_early_processor_set_pdc(); /* * Maybe EC region is required at bus_scan/acpi_get_devices. So it * is necessary to enable it as early as possible. */ acpi_ec_dsdt_probe(); printk(KERN_INFO PREFIX "Interpreter enabled\n"); /* Initialize sleep structures */ acpi_sleep_init(); /* * Get the system interrupt model and evaluate \_PIC. */ result = acpi_bus_init_irq(); if (result) goto error1; /* * Register the for all standard device notifications. */ status = acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, &acpi_bus_notify, NULL); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to register for device notifications\n"); goto error1; } /* * Create the top ACPI proc directory */ acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); result = bus_register(&acpi_bus_type); if (!result) return 0; /* Mimic structured exception handling */ error1: acpi_terminate(); return -ENODEV; }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover11651.10%317.65%
Lv Zheng4017.62%317.65%
Len Brown229.69%15.88%
Rafael J. Wysocki135.73%15.88%
Octavian Purdila93.96%15.88%
Patrick Mochel52.20%211.76%
Alexey Y. Starikovskiy41.76%15.88%
Rui Zhang41.76%15.88%
Lin Ming41.76%15.88%
Srinivas Pandruvada41.76%15.88%
Yakui Zhao31.32%15.88%
Alexander Chiang31.32%15.88%
Total227100.00%17100.00%

struct kobject *acpi_kobj; EXPORT_SYMBOL_GPL(acpi_kobj);
static int __init acpi_init(void) { int result; if (acpi_disabled) { printk(KERN_INFO PREFIX "Interpreter disabled.\n"); return -ENODEV; } acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); if (!acpi_kobj) { printk(KERN_WARNING "%s: kset create error\n", __func__); acpi_kobj = NULL; } init_acpi_device_notify(); result = acpi_bus_init(); if (result) { disable_acpi(); return result; } pci_mmcfg_late_init(); acpi_iort_init(); acpi_scan_init(); acpi_ec_init(); acpi_debugfs_init(); acpi_sleep_proc_init(); acpi_wakeup_device_init(); acpi_debugger_init(); acpi_setup_sb_notify_handler(); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover2725.47%14.55%
Patrick Mochel1917.92%418.18%
Björn Helgaas1514.15%522.73%
Greg Kroah-Hartman1413.21%29.09%
Randy Dunlap109.43%14.55%
Rafael J. Wysocki43.77%14.55%
Len Brown43.77%29.09%
Rui Zhang32.83%14.55%
Lv Zheng32.83%29.09%
Prashanth Prakash32.83%14.55%
Tomasz Nowicki32.83%14.55%
Harvey Harrison10.94%14.55%
Total106100.00%22100.00%

subsys_initcall(acpi_init);

Overall Contributors

PersonTokensPropCommitsCommitProp
Rafael J. Wysocki163638.38%1614.04%
David Shaohua Li68316.02%32.63%
Andy Grover44810.51%76.14%
Prashanth Prakash1874.39%10.88%
Dan O'Donovan1603.75%10.88%
Len Brown1393.26%1311.40%
Björn Helgaas1373.21%108.77%
Lin Ming962.25%32.63%
Rui Zhang882.06%32.63%
Patrick Mochel851.99%65.26%
Lv Zheng771.81%76.14%
Lan Tianyu761.78%10.88%
Aleksey Makarov521.22%10.88%
Huang Ying471.10%10.88%
Octavian Purdila451.06%10.88%
Srinivas Pandruvada451.06%32.63%
Alexey Y. Starikovskiy390.91%43.51%
Sudeep Holla350.82%21.75%
Yakui Zhao280.66%32.63%
Greg Kroah-Hartman190.45%21.75%
Hans de Goede190.45%10.88%
Randy Dunlap130.30%10.88%
Chun-Yi Lee120.28%10.88%
Andy Shevchenko110.26%10.88%
John Keller80.19%10.88%
Robert Moore80.19%10.88%
Hanjun Guo80.19%10.88%
Andrei Epure70.16%10.88%
Tomasz Nowicki60.14%10.88%
Toshi Kani60.14%10.88%
Matthew Garrett50.12%10.88%
Thomas Renninger50.12%10.88%
Andrew Lutomirski50.12%21.75%
Mark Brown50.12%10.88%
Harvey Harrison40.09%21.75%
Christoph Hellwig40.09%10.88%
Tejun Heo30.07%10.88%
Alexander Chiang30.07%10.88%
Robert Hancock30.07%10.88%
Jiang Liu20.05%10.88%
Jarkko Nikula10.02%10.88%
Matthew Wilcox10.02%10.88%
Tim Chen10.02%10.88%
Baoquan He10.02%10.88%
Total4263100.00%114100.00%
Directory: drivers/acpi
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