/* * 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/mailbox_controller.h>#include <linux/mailbox_client.h>#include <linux/types.h> #include <acpi/processor.h> /* Only support CPPCv2 for now. */#define CPPC_NUM_ENT	21#define CPPC_REV	2 #define PCC_CMD_COMPLETE 1#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;	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;	struct cpc_register_resource cpc_regs[MAX_CPC_REG_ENT];	struct acpi_psd_package domain_info;}; /* 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 reference_perf;	u32 lowest_perf;}; struct cppc_perf_ctrls {	u32 max_perf;	u32 min_perf;	u32 desired_perf;}; struct cppc_perf_fb_ctrs {	u64 reference;	u64 prev_reference;	u64 delivered;	u64 prev_delivered;}; /* Per CPU container for runtime CPPC management. */struct 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 cpudata **); /* Methods to interact with the PCC mailbox controller. */extern struct mbox_chan *	pcc_mbox_request_channel(struct mbox_client *, unsigned int);extern int mbox_send_message(struct mbox_chan *chan, void *mssg); #endif /* _CPPC_ACPI_H*/