From: Alex Chiang Date: Mon, 22 Feb 2010 19:11:14 +0000 (-0700) Subject: ACPI: processor: mv processor_pdc.c processor_core.c X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4d5d4cd88c542ff56cf7feacd29cc907f2abbfbb;p=openwrt%2Fstaging%2Fblogic.git ACPI: processor: mv processor_pdc.c processor_core.c We've renamed the old processor_core.c to processor_driver.c, to convey the idea that it can be built modular and has driver-like bits. Now let's re-create a processor_core.c for the bits needed statically by the rest of the kernel. The contents of processor_pdc.c are a good starting spot, so let's just rename that file and complete our three card monte. Acked-by: Venkatesh Pallipadi Signed-off-by: Alex Chiang Signed-off-by: Len Brown --- diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 6b363a50d18b..a8d8998dd5c5 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -32,7 +32,7 @@ acpi-$(CONFIG_ACPI_SLEEP) += proc.o # acpi-y += bus.o glue.o acpi-y += scan.o -acpi-y += processor_pdc.o +acpi-y += processor_core.o acpi-y += ec.o acpi-$(CONFIG_ACPI_DOCK) += dock.o acpi-y += pci_root.o pci_link.o pci_irq.o pci_bind.o diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c new file mode 100644 index 000000000000..6f376bf42904 --- /dev/null +++ b/drivers/acpi/processor_core.c @@ -0,0 +1,209 @@ +/* + * Copyright (C) 2005 Intel Corporation + * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. + * + * Alex Chiang + * - Unified x86/ia64 implementations + * Venkatesh Pallipadi + * - Added _PDC for platforms with Intel CPUs + */ +#include + +#include +#include + +#include "internal.h" + +#define PREFIX "ACPI: " +#define _COMPONENT ACPI_PROCESSOR_COMPONENT +ACPI_MODULE_NAME("processor_core"); + +static int set_no_mwait(const struct dmi_system_id *id) +{ + printk(KERN_NOTICE PREFIX "%s detected - " + "disabling mwait for CPU C-states\n", id->ident); + idle_nomwait = 1; + return 0; +} + +static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { + { + set_no_mwait, "IFL91 board", { + DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), + DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), + DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, + { + set_no_mwait, "Extensa 5220", { + DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), + DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, + {}, +}; + +static void acpi_set_pdc_bits(u32 *buf) +{ + buf[0] = ACPI_PDC_REVISION_ID; + buf[1] = 1; + + /* Enable coordination with firmware's _TSD info */ + buf[2] = ACPI_PDC_SMP_T_SWCOORD; + + /* Twiddle arch-specific bits needed for _PDC */ + arch_acpi_set_pdc_bits(buf); +} + +static struct acpi_object_list *acpi_processor_alloc_pdc(void) +{ + struct acpi_object_list *obj_list; + union acpi_object *obj; + u32 *buf; + + /* allocate and initialize pdc. It will be used later. */ + obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL); + if (!obj_list) { + printk(KERN_ERR "Memory allocation error\n"); + return NULL; + } + + obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL); + if (!obj) { + printk(KERN_ERR "Memory allocation error\n"); + kfree(obj_list); + return NULL; + } + + buf = kmalloc(12, GFP_KERNEL); + if (!buf) { + printk(KERN_ERR "Memory allocation error\n"); + kfree(obj); + kfree(obj_list); + return NULL; + } + + acpi_set_pdc_bits(buf); + + obj->type = ACPI_TYPE_BUFFER; + obj->buffer.length = 12; + obj->buffer.pointer = (u8 *) buf; + obj_list->count = 1; + obj_list->pointer = obj; + + return obj_list; +} + +/* + * _PDC is required for a BIOS-OS handshake for most of the newer + * ACPI processor features. + */ +static int +acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in) +{ + acpi_status status = AE_OK; + + if (idle_nomwait) { + /* + * If mwait is disabled for CPU C-states, the C2C3_FFH access + * mode will be disabled in the parameter of _PDC object. + * Of course C1_FFH access mode will also be disabled. + */ + union acpi_object *obj; + u32 *buffer = NULL; + + obj = pdc_in->pointer; + buffer = (u32 *)(obj->buffer.pointer); + buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); + + } + status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL); + + if (ACPI_FAILURE(status)) + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Could not evaluate _PDC, using legacy perf. control.\n")); + + return status; +} + +static int early_pdc_done; + +void acpi_processor_set_pdc(acpi_handle handle) +{ + struct acpi_object_list *obj_list; + + if (arch_has_acpi_pdc() == false) + return; + + if (early_pdc_done) + return; + + obj_list = acpi_processor_alloc_pdc(); + if (!obj_list) + return; + + acpi_processor_eval_pdc(handle, obj_list); + + kfree(obj_list->pointer->buffer.pointer); + kfree(obj_list->pointer); + kfree(obj_list); +} +EXPORT_SYMBOL_GPL(acpi_processor_set_pdc); + +static int early_pdc_optin; +static int set_early_pdc_optin(const struct dmi_system_id *id) +{ + early_pdc_optin = 1; + return 0; +} + +static int param_early_pdc_optin(char *s) +{ + early_pdc_optin = 1; + return 1; +} +__setup("acpi_early_pdc_eval", param_early_pdc_optin); + +static struct dmi_system_id __cpuinitdata early_pdc_optin_table[] = { + { + set_early_pdc_optin, "HP Envy", { + DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Envy") }, NULL}, + { + set_early_pdc_optin, "HP Pavilion dv6", { + DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv6") }, NULL}, + { + set_early_pdc_optin, "HP Pavilion dv7", { + DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv7") }, NULL}, + {}, +}; + +static acpi_status +early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv) +{ + acpi_processor_set_pdc(handle); + return AE_OK; +} + +void __init acpi_early_processor_set_pdc(void) +{ + /* + * Check whether the system is DMI table. If yes, OSPM + * should not use mwait for CPU-states. + */ + dmi_check_system(processor_idle_dmi_table); + + /* + * Allow systems to opt-in to early _PDC evaluation. + */ + dmi_check_system(early_pdc_optin_table); + if (!early_pdc_optin) + return; + + acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, + early_init_pdc, NULL, NULL, NULL); + + early_pdc_done = 1; +} diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c deleted file mode 100644 index e306ba9aa34e..000000000000 --- a/drivers/acpi/processor_pdc.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * Copyright (C) 2005 Intel Corporation - * Copyright (C) 2009 Hewlett-Packard Development Company, L.P. - * - * Alex Chiang - * - Unified x86/ia64 implementations - * Venkatesh Pallipadi - * - Added _PDC for platforms with Intel CPUs - */ -#include - -#include -#include - -#include "internal.h" - -#define PREFIX "ACPI: " -#define _COMPONENT ACPI_PROCESSOR_COMPONENT -ACPI_MODULE_NAME("processor_pdc"); - -static int set_no_mwait(const struct dmi_system_id *id) -{ - printk(KERN_NOTICE PREFIX "%s detected - " - "disabling mwait for CPU C-states\n", id->ident); - idle_nomwait = 1; - return 0; -} - -static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { - { - set_no_mwait, "IFL91 board", { - DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), - DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), - DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), - DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, - { - set_no_mwait, "Extensa 5220", { - DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), - DMI_MATCH(DMI_SYS_VENDOR, "Acer"), - DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), - DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, - {}, -}; - -static void acpi_set_pdc_bits(u32 *buf) -{ - buf[0] = ACPI_PDC_REVISION_ID; - buf[1] = 1; - - /* Enable coordination with firmware's _TSD info */ - buf[2] = ACPI_PDC_SMP_T_SWCOORD; - - /* Twiddle arch-specific bits needed for _PDC */ - arch_acpi_set_pdc_bits(buf); -} - -static struct acpi_object_list *acpi_processor_alloc_pdc(void) -{ - struct acpi_object_list *obj_list; - union acpi_object *obj; - u32 *buf; - - /* allocate and initialize pdc. It will be used later. */ - obj_list = kmalloc(sizeof(struct acpi_object_list), GFP_KERNEL); - if (!obj_list) { - printk(KERN_ERR "Memory allocation error\n"); - return NULL; - } - - obj = kmalloc(sizeof(union acpi_object), GFP_KERNEL); - if (!obj) { - printk(KERN_ERR "Memory allocation error\n"); - kfree(obj_list); - return NULL; - } - - buf = kmalloc(12, GFP_KERNEL); - if (!buf) { - printk(KERN_ERR "Memory allocation error\n"); - kfree(obj); - kfree(obj_list); - return NULL; - } - - acpi_set_pdc_bits(buf); - - obj->type = ACPI_TYPE_BUFFER; - obj->buffer.length = 12; - obj->buffer.pointer = (u8 *) buf; - obj_list->count = 1; - obj_list->pointer = obj; - - return obj_list; -} - -/* - * _PDC is required for a BIOS-OS handshake for most of the newer - * ACPI processor features. - */ -static int -acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in) -{ - acpi_status status = AE_OK; - - if (idle_nomwait) { - /* - * If mwait is disabled for CPU C-states, the C2C3_FFH access - * mode will be disabled in the parameter of _PDC object. - * Of course C1_FFH access mode will also be disabled. - */ - union acpi_object *obj; - u32 *buffer = NULL; - - obj = pdc_in->pointer; - buffer = (u32 *)(obj->buffer.pointer); - buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); - - } - status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL); - - if (ACPI_FAILURE(status)) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Could not evaluate _PDC, using legacy perf. control.\n")); - - return status; -} - -static int early_pdc_done; - -void acpi_processor_set_pdc(acpi_handle handle) -{ - struct acpi_object_list *obj_list; - - if (arch_has_acpi_pdc() == false) - return; - - if (early_pdc_done) - return; - - obj_list = acpi_processor_alloc_pdc(); - if (!obj_list) - return; - - acpi_processor_eval_pdc(handle, obj_list); - - kfree(obj_list->pointer->buffer.pointer); - kfree(obj_list->pointer); - kfree(obj_list); -} -EXPORT_SYMBOL_GPL(acpi_processor_set_pdc); - -static int early_pdc_optin; -static int set_early_pdc_optin(const struct dmi_system_id *id) -{ - early_pdc_optin = 1; - return 0; -} - -static int param_early_pdc_optin(char *s) -{ - early_pdc_optin = 1; - return 1; -} -__setup("acpi_early_pdc_eval", param_early_pdc_optin); - -static struct dmi_system_id __cpuinitdata early_pdc_optin_table[] = { - { - set_early_pdc_optin, "HP Envy", { - DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Envy") }, NULL}, - { - set_early_pdc_optin, "HP Pavilion dv6", { - DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv6") }, NULL}, - { - set_early_pdc_optin, "HP Pavilion dv7", { - DMI_MATCH(DMI_BIOS_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv7") }, NULL}, - {}, -}; - -static acpi_status -early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv) -{ - acpi_processor_set_pdc(handle); - return AE_OK; -} - -void __init acpi_early_processor_set_pdc(void) -{ - /* - * Check whether the system is DMI table. If yes, OSPM - * should not use mwait for CPU-states. - */ - dmi_check_system(processor_idle_dmi_table); - - /* - * Allow systems to opt-in to early _PDC evaluation. - */ - dmi_check_system(early_pdc_optin_table); - if (!early_pdc_optin) - return; - - acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, - early_init_pdc, NULL, NULL, NULL); - - early_pdc_done = 1; -} diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 1172c27adadf..7bb0b8b9332e 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -320,7 +320,7 @@ static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) #endif /* CONFIG_CPU_FREQ */ -/* in processor_pdc.c */ +/* in processor_core.c */ void acpi_processor_set_pdc(acpi_handle handle); /* in processor_throttling.c */