123 lines
4.4 KiB
C
123 lines
4.4 KiB
C
/*
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* Copyright (c) 2012 NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef _LINUX_CPUQUIET_H
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#define _LINUX_CPUQUIET_H
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#include <linux/kobject.h>
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#include <linux/sysfs.h>
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#include <linux/platform_device.h>
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#define CPUQUIET_NAME_LEN 16
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struct cpuquiet_governor {
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char name[CPUQUIET_NAME_LEN];
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struct list_head governor_list;
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int (*start) (void);
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void (*stop) (void);
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int (*store_active) (unsigned int cpu, bool active);
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struct module *owner;
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};
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struct cpuquiet_driver {
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char name[CPUQUIET_NAME_LEN];
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int (*quiesce_cpu) (unsigned int cpunumber, bool sync);
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int (*wake_cpu) (unsigned int cpunumber, bool sync);
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int avg_hotplug_latency_ms;
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};
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extern int cpuquiet_register_governor(struct cpuquiet_governor *gov);
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extern void cpuquiet_unregister_governor(struct cpuquiet_governor *gov);
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extern int cpuquiet_quiesce_cpu(unsigned int cpunumber, bool sync);
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extern int cpuquiet_wake_cpu(unsigned int cpunumber, bool sync);
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extern int cpuquiet_register_driver(struct cpuquiet_driver *drv);
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extern void cpuquiet_unregister_driver(struct cpuquiet_driver *drv);
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extern int cpuquiet_get_avg_hotplug_latency(void);
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extern int cpuquiet_cpu_up(unsigned int cpunumber, bool sync);
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extern int cpuquiet_cpu_down(unsigned int cpunumber, bool sync);
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extern int cpuquiet_remove_common(struct platform_device *pdev);
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extern int cpuquiet_probe_common(struct platform_device *pdev);
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extern int cpuquiet_probe_common_post(struct platform_device *pdev);
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#ifdef CONFIG_CPU_QUIET_STATS
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/* Sysfs support */
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struct cpuquiet_attribute {
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struct attribute attr;
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ssize_t (*show)(struct cpuquiet_attribute *attr, char *buf);
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ssize_t (*store)(struct cpuquiet_attribute *attr, const char *buf,
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size_t count);
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/*
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* For simple attributes, a pointer to the memory that is being
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* read/written.
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*/
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void *param;
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};
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#define CPQ_SIMPLE_ATTRIBUTE(_name, _mode, _type) \
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static struct cpuquiet_attribute _name ## _attr = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = show_ ## _type ## _attribute, \
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.store = store_ ## _type ## _attribute, \
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.param = &_name, \
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}
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#define CPQ_ATTRIBUTE(_name, _mode, _show, _store) \
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static struct cpuquiet_attribute _name ## _attr = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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.param = NULL, \
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}
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struct cpuquiet_cpu_attribute {
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struct attribute attr;
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ssize_t (*show)(unsigned int cpu, char *buf);
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ssize_t (*store)(unsigned int cpu, const char *buf, size_t count);
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};
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#define CPQ_CPU_ATTRIBUTE(_name, _mode, _show, _store) \
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static struct cpuquiet_cpu_attribute _name ## _attr = { \
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.attr = {.name = __stringify(_name), .mode = _mode }, \
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.show = _show, \
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.store = _store, \
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}
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extern ssize_t show_int_attribute(struct cpuquiet_attribute *cattr, char *buf);
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extern ssize_t store_int_attribute(struct cpuquiet_attribute *cattr,
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const char *buf, size_t count);
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extern ssize_t show_bool_attribute(struct cpuquiet_attribute *cattr, char *buf);
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extern ssize_t store_bool_attribute(struct cpuquiet_attribute *cattr,
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const char *buf, size_t count);
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extern ssize_t show_uint_attribute(struct cpuquiet_attribute *cattr, char *buf);
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extern ssize_t store_uint_attribute(struct cpuquiet_attribute *cattr,
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const char *buf, size_t count);
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extern ssize_t show_ulong_attribute(struct cpuquiet_attribute *cattr,
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char *buf);
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extern ssize_t store_ulong_attribute(struct cpuquiet_attribute *cattr,
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const char *buf, size_t count);
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extern int cpuquiet_register_attrs(struct attribute_group *attrs);
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extern void cpuquiet_unregister_attrs(struct attribute_group *attrs);
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extern int cpuquiet_register_cpu_attrs(struct attribute_group *attrs);
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extern void cpuquiet_unregister_cpu_attrs(struct attribute_group *attrs);
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#endif
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#endif
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