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drivers/acpi/bus.c
33.3 KB
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// SPDX-License-Identifier: GPL-2.0-or-later |
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/* * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) * * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
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*/ #include <linux/module.h> #include <linux/init.h> #include <linux/ioport.h> |
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#include <linux/kernel.h> |
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#include <linux/list.h> #include <linux/sched.h> #include <linux/pm.h> #include <linux/device.h> #include <linux/proc_fs.h> |
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#include <linux/acpi.h> |
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#include <linux/slab.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/workqueue.h> #include <linux/reboot.h> #include <linux/delay.h> |
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#ifdef CONFIG_X86 #include <asm/mpspec.h> |
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#include <linux/dmi.h> |
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#endif |
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#include <linux/acpi_iort.h> |
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#include <linux/pci.h> |
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#include <acpi/apei.h> |
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#include <linux/suspend.h> |
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#include "internal.h" |
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#define _COMPONENT ACPI_BUS_COMPONENT |
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ACPI_MODULE_NAME("bus"); |
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|
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struct acpi_device *acpi_root; struct proc_dir_entry *acpi_root_dir; |
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EXPORT_SYMBOL(acpi_root_dir); |
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#ifdef CONFIG_X86 |
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#ifdef CONFIG_ACPI_CUSTOM_DSDT static inline int set_copy_dsdt(const struct dmi_system_id *id) { return 0; } #else |
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static int set_copy_dsdt(const struct dmi_system_id *id) { printk(KERN_NOTICE "%s detected - " "force copy of DSDT to local memory ", id->ident); acpi_gbl_copy_dsdt_locally = 1; return 0; } |
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#endif |
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static const struct dmi_system_id dsdt_dmi_table[] __initconst = { |
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/* |
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* Invoke DSDT corruption work-around on all Toshiba Satellite. |
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* https://bugzilla.kernel.org/show_bug.cgi?id=14679 */ { .callback = set_copy_dsdt, |
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.ident = "TOSHIBA Satellite", |
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.matches = { DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), |
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DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), |
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}, |
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}, {} |
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}; |
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#endif |
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/* -------------------------------------------------------------------------- Device Management -------------------------------------------------------------------------- */ |
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acpi_status acpi_bus_get_status_handle(acpi_handle handle, unsigned long long *sta) |
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{ |
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acpi_status status; |
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status = acpi_evaluate_integer(handle, "_STA", NULL, sta); if (ACPI_SUCCESS(status)) return AE_OK; |
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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; |
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} |
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return status; } |
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EXPORT_SYMBOL_GPL(acpi_bus_get_status_handle); |
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int acpi_bus_get_status(struct acpi_device *device) { acpi_status status; unsigned long long sta; |
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if (acpi_device_always_present(device)) { acpi_set_device_status(device, ACPI_STA_DEFAULT); return 0; } |
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/* Battery devices must have their deps met before calling _STA */ if (acpi_device_is_battery(device) && device->dep_unmet) { acpi_set_device_status(device, 0); return 0; } |
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status = acpi_bus_get_status_handle(device->handle, &sta); if (ACPI_FAILURE(status)) return -ENODEV; |
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acpi_set_device_status(device, sta); |
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if (device->status.functional && !device->status.present) { |
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " "functional but not present; ", |
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device->pnp.bus_id, (u32)sta)); |
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} |
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x] ", |
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device->pnp.bus_id, (u32)sta)); |
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return 0; |
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} |
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EXPORT_SYMBOL(acpi_bus_get_status); |
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void acpi_bus_private_data_handler(acpi_handle handle, |
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void *context) |
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{ return; } EXPORT_SYMBOL(acpi_bus_private_data_handler); |
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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 "); return -ENODEV; } return 0; } EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); |
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int acpi_bus_get_private_data(acpi_handle handle, void **data) { |
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acpi_status status; |
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if (!data) |
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return -EINVAL; status = acpi_get_data(handle, acpi_bus_private_data_handler, data); |
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if (ACPI_FAILURE(status)) { acpi_handle_debug(handle, "No context for object "); |
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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); } EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); |
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static void acpi_print_osc_error(acpi_handle handle, |
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struct acpi_osc_context *context, char *error) |
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{ |
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int i; |
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acpi_handle_debug(handle, "(%s): %s ", context->uuid_str, error); pr_debug("_OSC request data:"); |
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for (i = 0; i < context->cap.length; i += sizeof(u32)) |
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pr_debug(" %x", *((u32 *)(context->cap.pointer + i))); pr_debug(" "); |
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} |
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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; |
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guid_t guid; |
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u32 errors; |
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struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; |
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if (!context) return AE_ERROR; |
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if (guid_parse(context->uuid_str, &guid)) |
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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; |
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in_params[0].buffer.pointer = (u8 *)&guid; |
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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; |
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status = acpi_evaluate_object(handle, "_OSC", &input, &output); |
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if (ACPI_FAILURE(status)) return status; |
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if (!output.length) |
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return AE_NULL_OBJECT; |
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out_obj = output.pointer; if (out_obj->type != ACPI_TYPE_BUFFER || out_obj->buffer.length != context->cap.length) { |
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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) { |
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if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] |
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& OSC_QUERY_ENABLE) goto out_success; status = AE_SUPPORT; goto out_kfree; } status = AE_ERROR; goto out_kfree; } out_success: |
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context->ret.length = out_obj->buffer.length; |
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context->ret.pointer = kmemdup(out_obj->buffer.pointer, context->ret.length, GFP_KERNEL); |
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if (!context->ret.pointer) { status = AE_NO_MEMORY; goto out_kfree; } |
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status = AE_OK; |
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out_kfree: |
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kfree(output.pointer); if (status != AE_OK) context->ret.pointer = NULL; |
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return status; } EXPORT_SYMBOL(acpi_run_osc); |
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bool osc_sb_apei_support_acked; |
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/* * 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); |
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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; |
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capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ |
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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; |
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; |
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; |
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#ifdef CONFIG_ARM64 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; #endif |
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#ifdef CONFIG_X86 |
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT; |
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if (boot_cpu_has(X86_FEATURE_HWP)) { capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT; } #endif |
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if (IS_ENABLED(CONFIG_SCHED_MC_PRIO)) |
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT; |
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if (!ghes_disable) |
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capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; |
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if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) return; |
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if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { u32 *capbuf_ret = context.ret.pointer; |
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if (context.ret.length > OSC_SUPPORT_DWORD) { |
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osc_sb_apei_support_acked = |
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capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; |
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osc_pc_lpi_support_confirmed = capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT; } |
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kfree(context.ret.pointer); |
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} /* do we need to check other returned cap? Sounds no */ |
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} |
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/* -------------------------------------------------------------------------- |
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Notification Handling -------------------------------------------------------------------------- */ |
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/** * acpi_bus_notify * --------------- * Callback for all 'system-level' device notifications (values 0x00-0x7F). */ |
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static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) |
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{ |
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struct acpi_device *adev; |
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struct acpi_driver *driver; |
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u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; |
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bool hotplug_event = false; |
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switch (type) { |
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case ACPI_NOTIFY_BUS_CHECK: |
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acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event "); |
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hotplug_event = true; |
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break; case ACPI_NOTIFY_DEVICE_CHECK: |
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acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event "); |
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hotplug_event = true; |
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break; case ACPI_NOTIFY_DEVICE_WAKE: |
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acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event "); |
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break; case ACPI_NOTIFY_EJECT_REQUEST: |
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acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event "); |
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hotplug_event = true; |
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break; case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: |
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acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event "); |
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/* TBD: Exactly what does 'light' mean? */ break; case ACPI_NOTIFY_FREQUENCY_MISMATCH: |
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acpi_handle_err(handle, "Device cannot be configured due " "to a frequency mismatch "); |
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break; case ACPI_NOTIFY_BUS_MODE_MISMATCH: |
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acpi_handle_err(handle, "Device cannot be configured due " "to a bus mode mismatch "); |
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break; case ACPI_NOTIFY_POWER_FAULT: |
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acpi_handle_err(handle, "Device has suffered a power fault "); |
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break; default: |
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acpi_handle_debug(handle, "Unknown event type 0x%x ", type); break; |
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} |
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adev = acpi_bus_get_acpi_device(handle); if (!adev) goto err; |
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driver = adev->driver; if (driver && driver->ops.notify && (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) driver->ops.notify(adev, type); |
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if (!hotplug_event) { acpi_bus_put_acpi_device(adev); return; } if (ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) |
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return; |
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acpi_bus_put_acpi_device(adev); |
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err: |
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acpi_evaluate_ost(handle, type, ost_code, NULL); |
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} |
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static void acpi_device_notify(acpi_handle handle, u32 event, void *data) { struct acpi_device *device = data; device->driver->ops.notify(device, event); } 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); } static u32 acpi_device_fixed_event(void *data) { acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data); return ACPI_INTERRUPT_HANDLED; } 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; } 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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/* 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. "); acpi_evaluate_ost(sb_handle, ACPI_OST_EC_OSPM_SHUTDOWN, ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS, NULL); msleep(ACPI_SB_INDICATE_INTERVAL); } } 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 ", event); } 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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/* -------------------------------------------------------------------------- |
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Device Matching -------------------------------------------------------------------------- */ |
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|
522 523 524 525 526 527 528 |
/** * 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) |
e91a398c3
|
529 530 |
{ struct mutex *physical_node_lock = &adev->physical_node_lock; |
3b95bd160
|
531 |
struct device *phys_dev; |
e91a398c3
|
532 533 534 |
mutex_lock(physical_node_lock); if (list_empty(&adev->physical_node_list)) { |
3b95bd160
|
535 |
phys_dev = NULL; |
e91a398c3
|
536 537 538 539 540 |
} else { const struct acpi_device_physical_node *node; node = list_first_entry(&adev->physical_node_list, struct acpi_device_physical_node, node); |
3b95bd160
|
541 542 |
phys_dev = node->dev; |
e91a398c3
|
543 544 |
} mutex_unlock(physical_node_lock); |
3b95bd160
|
545 546 |
return phys_dev; } |
1c9698f85
|
547 |
EXPORT_SYMBOL_GPL(acpi_get_first_physical_node); |
3b95bd160
|
548 549 550 551 552 553 554 |
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; |
e91a398c3
|
555 |
} |
3431e490b
|
556 557 558 559 560 561 562 563 564 565 566 567 568 569 |
/** * 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) { |
e91a398c3
|
570 |
return !!acpi_primary_dev_companion(adev, dev); |
3431e490b
|
571 |
} |
68c6b148d
|
572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 |
/* * 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; |
68c6b148d
|
596 597 598 599 600 601 602 |
adev = ACPI_COMPANION(dev); if (!adev) return NULL; if (list_empty(&adev->pnp.ids)) return NULL; |
e91a398c3
|
603 |
return acpi_primary_dev_companion(adev, dev); |
68c6b148d
|
604 605 606 607 608 609 |
} /** * 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. |
4222f38ca
|
610 |
* @of_id: OF ID if matched |
68c6b148d
|
611 612 613 614 615 616 |
* * 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, |
4222f38ca
|
617 618 |
const struct of_device_id *of_match_table, const struct of_device_id **of_id) |
68c6b148d
|
619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 |
{ 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++) |
4222f38ca
|
642 643 644 |
if (!strcasecmp(obj->string.pointer, id->compatible)) { if (of_id) *of_id = id; |
68c6b148d
|
645 |
return true; |
4222f38ca
|
646 |
} |
68c6b148d
|
647 648 649 650 |
} return false; } |
51ede5d96
|
651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 |
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; } /** * 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); } EXPORT_SYMBOL_GPL(acpi_set_modalias); |
68c6b148d
|
692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 |
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; } |
4222f38ca
|
714 715 716 717 718 |
static bool __acpi_match_device(struct acpi_device *device, const struct acpi_device_id *acpi_ids, const struct of_device_id *of_ids, const struct acpi_device_id **acpi_id, const struct of_device_id **of_id) |
68c6b148d
|
719 720 721 722 723 724 725 726 727 |
{ 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) |
4222f38ca
|
728 |
return false; |
68c6b148d
|
729 730 731 |
list_for_each_entry(hwid, &device->pnp.ids, list) { /* First, check the ACPI/PNP IDs provided by the caller. */ |
4222f38ca
|
732 733 734 735 736 737 738 |
if (acpi_ids) { for (id = acpi_ids; id->id[0] || id->cls; id++) { if (id->id[0] && !strcmp((char *)id->id, hwid->id)) goto out_acpi_match; if (id->cls && __acpi_match_device_cls(id, hwid)) goto out_acpi_match; } |
68c6b148d
|
739 740 741 742 743 |
} /* * Next, check ACPI_DT_NAMESPACE_HID and try to match the * "compatible" property if found. |
68c6b148d
|
744 |
*/ |
4222f38ca
|
745 746 |
if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)) return acpi_of_match_device(device, of_ids, of_id); |
68c6b148d
|
747 |
} |
4222f38ca
|
748 749 750 751 752 753 |
return false; out_acpi_match: if (acpi_id) *acpi_id = id; return true; |
68c6b148d
|
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 |
} /** * 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) { |
4222f38ca
|
770 771 772 773 |
const struct acpi_device_id *id = NULL; __acpi_match_device(acpi_companion_match(dev), ids, NULL, &id, NULL); return id; |
68c6b148d
|
774 775 |
} EXPORT_SYMBOL_GPL(acpi_match_device); |
886ca88be
|
776 777 778 779 780 781 782 783 784 785 |
static const void *acpi_of_device_get_match_data(const struct device *dev) { struct acpi_device *adev = ACPI_COMPANION(dev); const struct of_device_id *match = NULL; if (!acpi_of_match_device(adev, dev->driver->of_match_table, &match)) return NULL; return match->data; } |
67dcc26d2
|
786 |
const void *acpi_device_get_match_data(const struct device *dev) |
80212a162
|
787 788 |
{ const struct acpi_device_id *match; |
886ca88be
|
789 790 |
if (!dev->driver->acpi_match_table) return acpi_of_device_get_match_data(dev); |
80212a162
|
791 792 793 |
match = acpi_match_device(dev->driver->acpi_match_table, dev); if (!match) return NULL; |
67dcc26d2
|
794 |
return (const void *)match->driver_data; |
80212a162
|
795 |
} |
29d5325a1
|
796 |
EXPORT_SYMBOL_GPL(acpi_device_get_match_data); |
80212a162
|
797 |
|
68c6b148d
|
798 799 800 |
int acpi_match_device_ids(struct acpi_device *device, const struct acpi_device_id *ids) { |
4222f38ca
|
801 |
return __acpi_match_device(device, ids, NULL, NULL, NULL) ? 0 : -ENOENT; |
68c6b148d
|
802 803 804 805 806 807 808 809 |
} 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), |
4222f38ca
|
810 811 |
drv->of_match_table, NULL); |
68c6b148d
|
812 |
|
4222f38ca
|
813 814 815 |
return __acpi_match_device(acpi_companion_match(dev), drv->acpi_match_table, drv->of_match_table, NULL, NULL); |
68c6b148d
|
816 817 818 819 |
} EXPORT_SYMBOL_GPL(acpi_driver_match_device); /* -------------------------------------------------------------------------- |
5894b0c46
|
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 |
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; } 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); } 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); } static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) { return __acpi_device_uevent_modalias(to_acpi_device(dev), env); } 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] ", 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] ", acpi_drv->name, acpi_dev->pnp.bus_id)); get_device(dev); return 0; } |
67fbd0a3a
|
919 |
static int acpi_device_remove(struct device *dev) |
5894b0c46
|
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 |
{ 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; } struct bus_type acpi_bus_type = { .name = "acpi", .match = acpi_bus_match, .probe = acpi_device_probe, .remove = acpi_device_remove, .uevent = acpi_device_uevent, }; |
1da177e4c
|
944 945 946 |
/* -------------------------------------------------------------------------- Initialization/Cleanup -------------------------------------------------------------------------- */ |
4be44fcd3
|
947 |
static int __init acpi_bus_init_irq(void) |
1da177e4c
|
948 |
{ |
6a8c0af6e
|
949 |
acpi_status status; |
4be44fcd3
|
950 |
char *message = NULL; |
1da177e4c
|
951 |
|
1da177e4c
|
952 |
|
aafbcd165
|
953 |
/* |
1da177e4c
|
954 955 956 957 958 959 960 961 962 963 964 965 966 967 |
* 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; |
fbe61ec71
|
968 969 970 |
case ACPI_IRQ_MODEL_GIC: message = "GIC"; break; |
3948ec940
|
971 972 973 |
case ACPI_IRQ_MODEL_PLATFORM: message = "platform specific model"; break; |
1da177e4c
|
974 975 976 |
default: printk(KERN_WARNING PREFIX "Unknown interrupt routing model "); |
d550d98d3
|
977 |
return -ENODEV; |
1da177e4c
|
978 979 980 981 |
} printk(KERN_INFO PREFIX "Using %s for interrupt routing ", message); |
0db982026
|
982 |
status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); |
1da177e4c
|
983 |
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
a6fc67202
|
984 |
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); |
d550d98d3
|
985 |
return -ENODEV; |
1da177e4c
|
986 |
} |
d550d98d3
|
987 |
return 0; |
1da177e4c
|
988 |
} |
b064a8fa7
|
989 990 991 992 993 994 995 996 997 998 |
/** * 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. */ |
4be44fcd3
|
999 |
void __init acpi_early_init(void) |
1da177e4c
|
1000 |
{ |
6a8c0af6e
|
1001 |
acpi_status status; |
1da177e4c
|
1002 1003 |
if (acpi_disabled) |
d550d98d3
|
1004 |
return; |
1da177e4c
|
1005 |
|
61686124f
|
1006 1007 |
printk(KERN_INFO PREFIX "Core revision %08x ", ACPI_CA_VERSION); |
1da177e4c
|
1008 1009 1010 |
/* enable workarounds, unless strict ACPI spec. compliance */ if (!acpi_strict) acpi_gbl_enable_interpreter_slack = TRUE; |
8d3523fb3
|
1011 |
acpi_permanent_mmap = true; |
ad71860a1
|
1012 |
|
5d128fbd8
|
1013 |
#ifdef CONFIG_X86 |
ae976358c
|
1014 1015 |
/* * If the machine falls into the DMI check table, |
5d128fbd8
|
1016 1017 1018 1019 |
* DSDT will be copied to memory. * Note that calling dmi_check_system() here on other architectures * would not be OK because only x86 initializes dmi early enough. * Thankfully only x86 systems need such quirks for now. |
ae976358c
|
1020 1021 |
*/ dmi_check_system(dsdt_dmi_table); |
5d128fbd8
|
1022 |
#endif |
aa2110cb1
|
1023 |
|
ad71860a1
|
1024 1025 1026 1027 1028 1029 1030 |
status = acpi_reallocate_root_table(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to reallocate ACPI tables "); goto error0; } |
1da177e4c
|
1031 1032 |
status = acpi_initialize_subsystem(); if (ACPI_FAILURE(status)) { |
4be44fcd3
|
1033 1034 1035 |
printk(KERN_ERR PREFIX "Unable to initialize the ACPI Interpreter "); |
1da177e4c
|
1036 1037 |
goto error0; } |
1da177e4c
|
1038 1039 |
#ifdef CONFIG_X86 if (!acpi_ioapic) { |
1da177e4c
|
1040 |
/* compatible (0) means level (3) */ |
5f3b1a8b6
|
1041 1042 1043 1044 |
if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; } |
1da177e4c
|
1045 |
/* Set PIC-mode SCI trigger type */ |
cee324b14
|
1046 |
acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, |
5f3b1a8b6
|
1047 |
(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); |
1da177e4c
|
1048 |
} else { |
1da177e4c
|
1049 |
/* |
cee324b14
|
1050 |
* now that acpi_gbl_FADT is initialized, |
1da177e4c
|
1051 1052 |
* update it with result from INT_SRC_OVR parsing */ |
cee324b14
|
1053 |
acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; |
1da177e4c
|
1054 1055 |
} #endif |
b064a8fa7
|
1056 1057 1058 1059 1060 1061 1062 1063 1064 |
return; error0: disable_acpi(); } /** * acpi_subsystem_init - Finalize the early initialization of ACPI. * |
3af03f77c
|
1065 |
* Switch over the platform to the ACPI mode (if possible). |
b064a8fa7
|
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 |
* * 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; |
1da177e4c
|
1077 |
|
4505a2015
|
1078 |
status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); |
1da177e4c
|
1079 1080 1081 |
if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to enable ACPI "); |
b064a8fa7
|
1082 1083 1084 1085 1086 1087 1088 1089 1090 |
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(); |
1da177e4c
|
1091 |
} |
1da177e4c
|
1092 |
} |
68bdb6773
|
1093 1094 1095 1096 1097 1098 |
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); } |
4be44fcd3
|
1099 |
static int __init acpi_bus_init(void) |
1da177e4c
|
1100 |
{ |
6a8c0af6e
|
1101 1102 |
int result; acpi_status status; |
1da177e4c
|
1103 |
|
176f9c180
|
1104 |
acpi_os_initialize1(); |
1da177e4c
|
1105 |
|
d737f333b
|
1106 1107 1108 1109 1110 1111 |
status = acpi_load_tables(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to load the System Description Tables "); goto error1; |
fe6cbea0f
|
1112 |
} |
b1c033082
|
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 |
/* * ACPI 2.0 requires the EC driver to be loaded and work before the EC * device is found in the namespace. * * This is accomplished by looking for the ECDT table and getting the EC * parameters out of that. * * Do that before calling acpi_initialize_objects() which may trigger EC * address space accesses. */ acpi_ec_ecdt_probe(); |
fe6cbea0f
|
1124 1125 1126 1127 1128 1129 1130 |
status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to start the ACPI Interpreter "); goto error1; } |
1da177e4c
|
1131 1132 1133 1134 1135 1136 |
status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to initialize ACPI objects "); goto error1; } |
a21211672
|
1137 1138 |
/* Set capability bits for _OSC under processor scope */ acpi_early_processor_osc(); |
b1d248d96
|
1139 |
/* |
fc54ab729
|
1140 1141 1142 1143 1144 1145 |
* _OSC method may exist in module level code, * so it must be run after ACPI_FULL_INITIALIZATION */ acpi_bus_osc_support(); /* |
b1d248d96
|
1146 1147 1148 |
* _PDC control method may load dynamic SSDT tables, * and we need to install the table handler before that. */ |
68bdb6773
|
1149 |
status = acpi_install_table_handler(acpi_bus_table_handler, NULL); |
b1d248d96
|
1150 |
acpi_sysfs_init(); |
78f169965
|
1151 |
acpi_early_processor_set_pdc(); |
455c8793d
|
1152 1153 1154 1155 |
/* * Maybe EC region is required at bus_scan/acpi_get_devices. So it * is necessary to enable it as early as possible. */ |
dcf15cbde
|
1156 |
acpi_ec_dsdt_probe(); |
455c8793d
|
1157 |
|
1da177e4c
|
1158 1159 |
printk(KERN_INFO PREFIX "Interpreter enabled "); |
aafbcd165
|
1160 1161 |
/* Initialize sleep structures */ acpi_sleep_init(); |
1da177e4c
|
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 |
/* * Get the system interrupt model and evaluate \_PIC. */ result = acpi_bus_init_irq(); if (result) goto error1; /* * Register the for all standard device notifications. */ |
4be44fcd3
|
1172 1173 1174 |
status = acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, &acpi_bus_notify, NULL); |
1da177e4c
|
1175 |
if (ACPI_FAILURE(status)) { |
4be44fcd3
|
1176 1177 1178 |
printk(KERN_ERR PREFIX "Unable to register for device notifications "); |
1da177e4c
|
1179 1180 1181 1182 1183 1184 1185 |
goto error1; } /* * Create the top ACPI proc directory */ acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); |
1dcc3d336
|
1186 1187 1188 |
result = bus_register(&acpi_bus_type); if (!result) return 0; |
1da177e4c
|
1189 1190 |
/* Mimic structured exception handling */ |
4be44fcd3
|
1191 |
error1: |
1da177e4c
|
1192 |
acpi_terminate(); |
d550d98d3
|
1193 |
return -ENODEV; |
1da177e4c
|
1194 |
} |
99e0d2fc6
|
1195 |
struct kobject *acpi_kobj; |
f2d4753fb
|
1196 |
EXPORT_SYMBOL_GPL(acpi_kobj); |
1da177e4c
|
1197 |
|
4be44fcd3
|
1198 |
static int __init acpi_init(void) |
1da177e4c
|
1199 |
{ |
6831c6edc
|
1200 |
int result; |
1da177e4c
|
1201 |
|
1da177e4c
|
1202 1203 1204 |
if (acpi_disabled) { printk(KERN_INFO PREFIX "Interpreter disabled. "); |
d550d98d3
|
1205 |
return -ENODEV; |
1da177e4c
|
1206 |
} |
f62ed9e33
|
1207 |
acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); |
99e0d2fc6
|
1208 |
if (!acpi_kobj) { |
96b2dd1f1
|
1209 1210 |
printk(KERN_WARNING "%s: kset create error ", __func__); |
99e0d2fc6
|
1211 1212 |
acpi_kobj = NULL; } |
1da177e4c
|
1213 1214 |
result = acpi_bus_init(); |
6831c6edc
|
1215 |
if (result) { |
1da177e4c
|
1216 |
disable_acpi(); |
81d0273df
|
1217 |
return result; |
6831c6edc
|
1218 |
} |
81d0273df
|
1219 |
|
6831c6edc
|
1220 |
pci_mmcfg_late_init(); |
88ef16d88
|
1221 |
acpi_iort_init(); |
e747f2749
|
1222 |
acpi_scan_init(); |
a5f820feb
|
1223 |
acpi_ec_init(); |
a25ee9200
|
1224 |
acpi_debugfs_init(); |
9cee43e07
|
1225 |
acpi_sleep_proc_init(); |
201b8c655
|
1226 |
acpi_wakeup_device_init(); |
836d08301
|
1227 |
acpi_debugger_init(); |
baa0c019b
|
1228 |
acpi_setup_sb_notify_handler(); |
6831c6edc
|
1229 |
return 0; |
1da177e4c
|
1230 1231 1232 |
} subsys_initcall(acpi_init); |