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Release 4.12 include/acpi/cppc_acpi.h

Directory: include/acpi
/*
 * CPPC (Collaborative Processor Performance Control) methods used
 * by CPUfreq drivers.
 *
 * (C) Copyright 2014, 2015 Linaro Ltd.
 * Author: Ashwin Chaugule <ashwin.chaugule@linaro.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 2
 * of the License.
 */

#ifndef _CPPC_ACPI_H

#define _CPPC_ACPI_H

#include <linux/acpi.h>
#include <linux/types.h>

#include <acpi/pcc.h>
#include <acpi/processor.h>

/* Only support CPPCv2 for now. */

#define CPPC_NUM_ENT	21

#define CPPC_REV	2


#define PCC_CMD_COMPLETE_MASK	(1 << 0)

#define PCC_ERROR_MASK		(1 << 2)


#define MAX_CPC_REG_ENT 19

/* CPPC specific PCC commands. */

#define	CMD_READ 0

#define	CMD_WRITE 1

/* Each register has the folowing format. */

struct cpc_reg {
	
u8 descriptor;
	
u16 length;
	
u8 space_id;
	
u8 bit_width;
	
u8 bit_offset;
	
u8 access_width;
	
u64 __iomem address;

} __packed;

/*
 * Each entry in the CPC table is either
 * of type ACPI_TYPE_BUFFER or
 * ACPI_TYPE_INTEGER.
 */

struct cpc_register_resource {
	
acpi_object_type type;
	
u64 __iomem *sys_mem_vaddr;
	union {
		
struct cpc_reg reg;
		
u64 int_value;
	
} cpc_entry;
};

/* Container to hold the CPC details for each CPU */

struct cpc_desc {
	
int num_entries;
	
int version;
	
int cpu_id;
	
int write_cmd_status;
	
int write_cmd_id;
	
struct cpc_register_resource cpc_regs[MAX_CPC_REG_ENT];
	
struct acpi_psd_package domain_info;
	
struct kobject kobj;
};

/* These are indexes into the per-cpu cpc_regs[]. Order is important. */

enum cppc_regs {
	
HIGHEST_PERF,
	
NOMINAL_PERF,
	
LOW_NON_LINEAR_PERF,
	
LOWEST_PERF,
	
GUARANTEED_PERF,
	
DESIRED_PERF,
	
MIN_PERF,
	
MAX_PERF,
	
PERF_REDUC_TOLERANCE,
	
TIME_WINDOW,
	
CTR_WRAP_TIME,
	
REFERENCE_CTR,
	
DELIVERED_CTR,
	
PERF_LIMITED,
	
ENABLE,
	
AUTO_SEL_ENABLE,
	
AUTO_ACT_WINDOW,
	
ENERGY_PERF,
	
REFERENCE_PERF,
};

/*
 * Categorization of registers as described
 * in the ACPI v.5.1 spec.
 * XXX: Only filling up ones which are used by governors
 * today.
 */

struct cppc_perf_caps {
	
u32 highest_perf;
	
u32 nominal_perf;
	
u32 lowest_perf;
	
u32 lowest_nonlinear_perf;
};


struct cppc_perf_ctrls {
	
u32 max_perf;
	
u32 min_perf;
	
u32 desired_perf;
};


struct cppc_perf_fb_ctrs {
	
u64 reference;
	
u64 delivered;
	
u64 reference_perf;
	
u64 wraparound_time;
};

/* Per CPU container for runtime CPPC management. */

struct cppc_cpudata {
	
int cpu;
	
struct cppc_perf_caps perf_caps;
	
struct cppc_perf_ctrls perf_ctrls;
	
struct cppc_perf_fb_ctrs perf_fb_ctrs;
	
struct cpufreq_policy *cur_policy;
	
unsigned int shared_type;
	
cpumask_var_t shared_cpu_map;
};

extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs);
extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
extern int acpi_get_psd_map(struct cppc_cpudata **);
extern unsigned int cppc_get_transition_latency(int cpu);

#endif /* _CPPC_ACPI_H*/

Overall Contributors

PersonTokensPropCommitsCommitProp
Ashwin Chaugule29791.10%330.00%
Prashanth Prakash257.67%550.00%
Srinivas Pandruvada20.61%110.00%
Hoan Tran20.61%110.00%
Total326100.00%10100.00%
Directory: include/acpi
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