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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _CPU_PM_H
#define _CPU_PM_H
#ifdef __cplusplus
extern "C" {
#endif
#if (defined(_KERNEL) || defined(_KMEMUSER))
#include <sys/cpuvar.h>
#include <sys/processor.h>
#include <sys/types.h>
#include <sys/kstat.h>
#include <sys/cmt.h>
/*
* CPU Power Manager Policies
*/
typedef enum cpupm_policy {
CPUPM_POLICY_ELASTIC,
CPUPM_POLICY_DISABLED,
CPUPM_NUM_POLICIES
} cpupm_policy_t;
/*
* Power Managable CPU Domain Types
*/
typedef enum cpupm_dtype {
CPUPM_DTYPE_ACTIVE, /* Active Power Domain */
CPUPM_DTYPE_IDLE /* Idle Power Domain */
} cpupm_dtype_t;
/*
* CPUPM state names for policy implementation.
* The last element is used to size the enumeration.
*/
typedef enum cpupm_state_name {
CPUPM_STATE_LOW_POWER,
CPUPM_STATE_MAX_PERF,
CPUPM_STATE_NAMES
} cpupm_state_name_t;
/*
* Possible states for the domain's transience governor
*/
typedef enum cpupm_gov_state_t {
CPUPM_GOV_DISENGAGED,
CPUPM_GOV_TRANS_IDLE, /* Transient idleness, lowerings disabled */
CPUPM_GOV_TRANS_WORK /* Transient work, raises disabled */
} cpupm_gov_state_t;
/*
* Utilization events delivered by the dispatcher.
*/
typedef enum cpupm_util_event {
CPUPM_DOM_BUSY_FROM_IDLE,
CPUPM_DOM_IDLE_FROM_BUSY,
CPUPM_DOM_REMAIN_BUSY
} cpupm_util_event_t;
typedef uintptr_t cpupm_handle_t; /* Platform handle */
/*
* CPU Power Domain State
*/
typedef struct cpupm_state {
uint32_t cps_speed;
cpupm_handle_t cps_handle;
} cpupm_state_t;
/*
* CPU Power Domain
*/
typedef struct cpupm_domain {
id_t cpd_id; /* Domain ID */
cpupm_dtype_t cpd_type; /* Active or Idle */
cpupm_state_t *cpd_states; /* Available Power States */
cpupm_state_t *cpd_state; /* Current State */
uint_t cpd_nstates; /* Number of States */
cpupm_state_t *cpd_named_states[CPUPM_STATE_NAMES];
hrtime_t cpd_last_raise; /* Last raise request time */
hrtime_t cpd_last_lower; /* last lower request time */
int cpd_ti; /* transient idle history */
int cpd_tw; /* transient work history */
cpupm_gov_state_t cpd_governor; /* transience governor */
struct cpupm_domain *cpd_next;
} cpupm_domain_t;
#define CPUPM_NO_DOMAIN ((id_t)-1)
/*
* CPU power manager domain management interfaces
*/
cpupm_domain_t *cpupm_domain_init(struct cpu *, cpupm_dtype_t);
id_t cpupm_domain_id(struct cpu *, cpupm_dtype_t);
int cpupm_change_state(struct cpu *, cpupm_domain_t *,
cpupm_state_t *);
extern void cpupm_redefine_max_activepwr_state(struct cpu *, int);
/*
* CPU power manager policy engine interfaces
*/
int cpupm_set_policy(cpupm_policy_t);
cpupm_policy_t cpupm_get_policy(void);
void cpupm_utilization_event(struct cpu *, hrtime_t,
cpupm_domain_t *, cpupm_util_event_t);
/*
* CPU power platform driver interfaces
*/
id_t cpupm_plat_domain_id(struct cpu *, cpupm_dtype_t);
uint_t cpupm_plat_state_enumerate(struct cpu *, cpupm_dtype_t,
cpupm_state_t *);
int cpupm_plat_change_state(struct cpu *, cpupm_state_t *);
#endif /* !_KERNEL && !_KMEMUSER */
#ifdef __cplusplus
}
#endif
#endif /* _CPU_PM_H */
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