include/acpi/cppc_acpi.h

Source file repositories/reference/linux-study-clean/include/acpi/cppc_acpi.h

File Facts

System
Linux kernel
Corpus path
include/acpi/cppc_acpi.h
Extension
.h
Size
8153 bytes
Lines
308
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct cpc_reg {
	u8 descriptor;
	u16 length;
	u8 space_id;
	u8 bit_width;
	u8 bit_offset;
	u8 access_width;
	u64 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;
	/* Lock used for RMW operations in cpc_write() */
	raw_spinlock_t rmw_lock;
	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,
	LOWEST_FREQ,
	NOMINAL_FREQ,
	OSPM_NOMINAL_PERF,
	RESOURCE_PRIORITY,
};

/*
 * 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 guaranteed_perf;
	u32 highest_perf;
	u32 nominal_perf;
	u32 reference_perf;
	u32 lowest_perf;
	u32 lowest_nonlinear_perf;
	u32 lowest_freq;
	u32 nominal_freq;
};

struct cppc_perf_ctrls {
	u32 max_perf;
	u32 min_perf;
	u32 desired_perf;
	u32 energy_perf;
	bool auto_sel;
};

Annotation

Implementation Notes