mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-02-07 15:55:14 +07:00
ac212b6980
Split the ACPI processor driver into two parts, one that is non-modular, resides in the ACPI core and handles the enumeration and hotplug of processors and one that implements the rest of the existing processor driver functionality. The non-modular part uses an ACPI scan handler object to enumerate processors on the basis of information provided by the ACPI namespace and to hook up with the common ACPI hotplug infrastructure. It also populates the ACPI handle of each processor device having a corresponding object in the ACPI namespace, which allows the driver proper to bind to those devices, and makes the driver bind to them if it is readily available (i.e. loaded) when the scan handler's .attach() routine is running. There are a few reasons to make this change. First, switching the ACPI processor driver to using the common ACPI hotplug infrastructure reduces code duplication and size considerably, even though a new file is created along with a header comment etc. Second, since the common hotplug code attempts to offline devices before starting the (non-reversible) removal procedure, it will abort (and possibly roll back) hot-remove operations involving processors if cpu_down() returns an error code for one of them instead of continuing them blindly (if /sys/firmware/acpi/hotplug/force_remove is unset). That is a more desirable behavior than what the current code does. Finally, the separation of the scan/hotplug part from the driver proper makes it possible to simplify the driver's .remove() routine, because it doesn't need to worry about the possible cleanup related to processor removal any more (the scan/hotplug part is responsible for that now) and can handle device removal and driver removal symmetricaly (i.e. as appropriate). Some user-visible changes in sysfs are made (for example, the 'sysdev' link from the ACPI device node to the processor device's directory is gone and a 'physical_node' link is present instead and a corresponding 'firmware_node' is present in the processor device's directory, the processor driver is now visible under /sys/bus/cpu/drivers/ and bound to the processor device), but that shouldn't affect the functionality that users care about (frequency scaling, C-states and thermal management). Tested on my venerable Toshiba Portege R500. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Toshi Kani <toshi.kani@hp.com>
159 lines
5.6 KiB
C
159 lines
5.6 KiB
C
/*
|
|
* acpi/internal.h
|
|
* For use by Linux/ACPI infrastructure, not drivers
|
|
*
|
|
* Copyright (c) 2009, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef _ACPI_INTERNAL_H_
|
|
#define _ACPI_INTERNAL_H_
|
|
|
|
#define PREFIX "ACPI: "
|
|
|
|
int init_acpi_device_notify(void);
|
|
int acpi_scan_init(void);
|
|
#ifdef CONFIG_ACPI_PCI_SLOT
|
|
void acpi_pci_slot_init(void);
|
|
#else
|
|
static inline void acpi_pci_slot_init(void) { }
|
|
#endif
|
|
void acpi_pci_root_init(void);
|
|
void acpi_pci_link_init(void);
|
|
void acpi_pci_root_hp_init(void);
|
|
void acpi_processor_init(void);
|
|
void acpi_platform_init(void);
|
|
int acpi_sysfs_init(void);
|
|
void acpi_csrt_init(void);
|
|
#ifdef CONFIG_ACPI_CONTAINER
|
|
void acpi_container_init(void);
|
|
#else
|
|
static inline void acpi_container_init(void) {}
|
|
#endif
|
|
#ifdef CONFIG_ACPI_HOTPLUG_MEMORY
|
|
void acpi_memory_hotplug_init(void);
|
|
#else
|
|
static inline void acpi_memory_hotplug_init(void) {}
|
|
#endif
|
|
|
|
extern bool acpi_force_hot_remove;
|
|
|
|
void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
|
|
const char *name);
|
|
int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
|
|
const char *hotplug_profile_name);
|
|
void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
extern struct dentry *acpi_debugfs_dir;
|
|
int acpi_debugfs_init(void);
|
|
#else
|
|
static inline void acpi_debugfs_init(void) { return; }
|
|
#endif
|
|
#ifdef CONFIG_X86_INTEL_LPSS
|
|
void acpi_lpss_init(void);
|
|
#else
|
|
static inline void acpi_lpss_init(void) {}
|
|
#endif
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Device Node Initialization / Removal
|
|
-------------------------------------------------------------------------- */
|
|
#define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \
|
|
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING)
|
|
|
|
int acpi_device_add(struct acpi_device *device,
|
|
void (*release)(struct device *));
|
|
void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
|
|
int type, unsigned long long sta);
|
|
void acpi_device_add_finalize(struct acpi_device *device);
|
|
void acpi_free_pnp_ids(struct acpi_device_pnp *pnp);
|
|
int acpi_bind_one(struct device *dev, acpi_handle handle);
|
|
int acpi_unbind_one(struct device *dev);
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Power Resource
|
|
-------------------------------------------------------------------------- */
|
|
int acpi_power_init(void);
|
|
void acpi_power_resources_list_free(struct list_head *list);
|
|
int acpi_extract_power_resources(union acpi_object *package, unsigned int start,
|
|
struct list_head *list);
|
|
int acpi_add_power_resource(acpi_handle handle);
|
|
void acpi_power_add_remove_device(struct acpi_device *adev, bool add);
|
|
int acpi_power_wakeup_list_init(struct list_head *list, int *system_level);
|
|
int acpi_device_sleep_wake(struct acpi_device *dev,
|
|
int enable, int sleep_state, int dev_state);
|
|
int acpi_power_get_inferred_state(struct acpi_device *device, int *state);
|
|
int acpi_power_on_resources(struct acpi_device *device, int state);
|
|
int acpi_power_transition(struct acpi_device *device, int state);
|
|
|
|
int acpi_wakeup_device_init(void);
|
|
void acpi_early_processor_set_pdc(void);
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Embedded Controller
|
|
-------------------------------------------------------------------------- */
|
|
struct acpi_ec {
|
|
acpi_handle handle;
|
|
unsigned long gpe;
|
|
unsigned long command_addr;
|
|
unsigned long data_addr;
|
|
unsigned long global_lock;
|
|
unsigned long flags;
|
|
struct mutex mutex;
|
|
wait_queue_head_t wait;
|
|
struct list_head list;
|
|
struct transaction *curr;
|
|
spinlock_t lock;
|
|
};
|
|
|
|
extern struct acpi_ec *first_ec;
|
|
|
|
int acpi_ec_init(void);
|
|
int acpi_ec_ecdt_probe(void);
|
|
int acpi_boot_ec_enable(void);
|
|
void acpi_ec_block_transactions(void);
|
|
void acpi_ec_unblock_transactions(void);
|
|
void acpi_ec_unblock_transactions_early(void);
|
|
|
|
/*--------------------------------------------------------------------------
|
|
Suspend/Resume
|
|
-------------------------------------------------------------------------- */
|
|
extern int acpi_sleep_init(void);
|
|
|
|
#ifdef CONFIG_ACPI_SLEEP
|
|
int acpi_sleep_proc_init(void);
|
|
int suspend_nvs_alloc(void);
|
|
void suspend_nvs_free(void);
|
|
int suspend_nvs_save(void);
|
|
void suspend_nvs_restore(void);
|
|
#else
|
|
static inline int acpi_sleep_proc_init(void) { return 0; }
|
|
static inline int suspend_nvs_alloc(void) { return 0; }
|
|
static inline void suspend_nvs_free(void) {}
|
|
static inline int suspend_nvs_save(void) { return 0; }
|
|
static inline void suspend_nvs_restore(void) {}
|
|
#endif
|
|
|
|
/*--------------------------------------------------------------------------
|
|
Platform bus support
|
|
-------------------------------------------------------------------------- */
|
|
struct platform_device;
|
|
|
|
int acpi_create_platform_device(struct acpi_device *adev,
|
|
const struct acpi_device_id *id);
|
|
|
|
#endif /* _ACPI_INTERNAL_H_ */
|