--- /dev/null
+#ifndef __ACPI_PROCESSOR_H
+#define __ACPI_PROCESSOR_H
+
+#include <linux/kernel.h>
+#include <linux/cpu.h>
+#include <linux/thermal.h>
+#include <asm/acpi.h>
+
+#define ACPI_PROCESSOR_CLASS "processor"
+#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
+#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
+
+#define ACPI_PROCESSOR_BUSY_METRIC 10
+
+#define ACPI_PROCESSOR_MAX_POWER 8
+#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
+#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
+
+#define ACPI_PROCESSOR_MAX_THROTTLING 16
+#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
+#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
+
+#define ACPI_PDC_REVISION_ID 0x1
+
+#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
+#define ACPI_PSD_REV0_ENTRIES 5
+
+#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
+#define ACPI_TSD_REV0_ENTRIES 5
+/*
+ * Types of coordination defined in ACPI 3.0. Same macros can be used across
+ * P, C and T states
+ */
+#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
+#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
+#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
+
+#define ACPI_CSTATE_SYSTEMIO 0
+#define ACPI_CSTATE_FFH 1
+#define ACPI_CSTATE_HALT 2
+
+#define ACPI_CX_DESC_LEN 32
+
+/* Power Management */
+
+struct acpi_processor_cx;
+
+struct acpi_power_register {
+ u8 descriptor;
+ u16 length;
+ u8 space_id;
+ u8 bit_width;
+ u8 bit_offset;
+ u8 access_size;
+ u64 address;
+} __packed;
+
+struct acpi_processor_cx {
+ u8 valid;
+ u8 type;
+ u32 address;
+ u8 entry_method;
+ u8 index;
+ u32 latency;
+ u8 bm_sts_skip;
+ char desc[ACPI_CX_DESC_LEN];
+};
+
+struct acpi_processor_power {
+ int count;
+ struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
+ int timer_broadcast_on_state;
+};
+
+/* Performance Management */
+
+struct acpi_psd_package {
+ u64 num_entries;
+ u64 revision;
+ u64 domain;
+ u64 coord_type;
+ u64 num_processors;
+} __packed;
+
+struct acpi_pct_register {
+ u8 descriptor;
+ u16 length;
+ u8 space_id;
+ u8 bit_width;
+ u8 bit_offset;
+ u8 reserved;
+ u64 address;
+} __packed;
+
+struct acpi_processor_px {
+ u64 core_frequency; /* megahertz */
+ u64 power; /* milliWatts */
+ u64 transition_latency; /* microseconds */
+ u64 bus_master_latency; /* microseconds */
+ u64 control; /* control value */
+ u64 status; /* success indicator */
+};
+
+struct acpi_processor_performance {
+ unsigned int state;
+ unsigned int platform_limit;
+ struct acpi_pct_register control_register;
+ struct acpi_pct_register status_register;
+ unsigned int state_count;
+ struct acpi_processor_px *states;
+ struct acpi_psd_package domain_info;
+ cpumask_var_t shared_cpu_map;
+ unsigned int shared_type;
+};
+
+/* Throttling Control */
+
+struct acpi_tsd_package {
+ u64 num_entries;
+ u64 revision;
+ u64 domain;
+ u64 coord_type;
+ u64 num_processors;
+} __packed;
+
+struct acpi_ptc_register {
+ u8 descriptor;
+ u16 length;
+ u8 space_id;
+ u8 bit_width;
+ u8 bit_offset;
+ u8 reserved;
+ u64 address;
+} __packed;
+
+struct acpi_processor_tx_tss {
+ u64 freqpercentage; /* */
+ u64 power; /* milliWatts */
+ u64 transition_latency; /* microseconds */
+ u64 control; /* control value */
+ u64 status; /* success indicator */
+};
+struct acpi_processor_tx {
+ u16 power;
+ u16 performance;
+};
+
+struct acpi_processor;
+struct acpi_processor_throttling {
+ unsigned int state;
+ unsigned int platform_limit;
+ struct acpi_pct_register control_register;
+ struct acpi_pct_register status_register;
+ unsigned int state_count;
+ struct acpi_processor_tx_tss *states_tss;
+ struct acpi_tsd_package domain_info;
+ cpumask_var_t shared_cpu_map;
+ int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
+ int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
+ int state, bool force);
+
+ u32 address;
+ u8 duty_offset;
+ u8 duty_width;
+ u8 tsd_valid_flag;
+ unsigned int shared_type;
+ struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
+};
+
+/* Limit Interface */
+
+struct acpi_processor_lx {
+ int px; /* performance state */
+ int tx; /* throttle level */
+};
+
+struct acpi_processor_limit {
+ struct acpi_processor_lx state; /* current limit */
+ struct acpi_processor_lx thermal; /* thermal limit */
+ struct acpi_processor_lx user; /* user limit */
+};
+
+struct acpi_processor_flags {
+ u8 power:1;
+ u8 performance:1;
+ u8 throttling:1;
+ u8 limit:1;
+ u8 bm_control:1;
+ u8 bm_check:1;
+ u8 has_cst:1;
+ u8 power_setup_done:1;
+ u8 bm_rld_set:1;
+ u8 need_hotplug_init:1;
+};
+
+struct acpi_processor {
+ acpi_handle handle;
+ u32 acpi_id;
+ phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */
+ u32 id; /* CPU logical ID allocated by OS */
+ u32 pblk;
+ int performance_platform_limit;
+ int throttling_platform_limit;
+ /* 0 - states 0..n-th state available */
+
+ struct acpi_processor_flags flags;
+ struct acpi_processor_power power;
+ struct acpi_processor_performance *performance;
+ struct acpi_processor_throttling throttling;
+ struct acpi_processor_limit limit;
+ struct thermal_cooling_device *cdev;
+ struct device *dev; /* Processor device. */
+};
+
+struct acpi_processor_errata {
+ u8 smp;
+ struct {
+ u8 throttle:1;
+ u8 fdma:1;
+ u8 reserved:6;
+ u32 bmisx;
+ } piix4;
+};
+
+extern int acpi_processor_preregister_performance(struct
+ acpi_processor_performance
+ __percpu *performance);
+
+extern int acpi_processor_register_performance(struct acpi_processor_performance
+ *performance, unsigned int cpu);
+extern void acpi_processor_unregister_performance(struct
+ acpi_processor_performance
+ *performance,
+ unsigned int cpu);
+
+/* note: this locks both the calling module and the processor module
+ if a _PPC object exists, rmmod is disallowed then */
+int acpi_processor_notify_smm(struct module *calling_module);
+
+/* parsing the _P* objects. */
+extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
+
+/* for communication between multiple parts of the processor kernel module */
+DECLARE_PER_CPU(struct acpi_processor *, processors);
+extern struct acpi_processor_errata errata;
+
+#ifdef ARCH_HAS_POWER_INIT
+void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
+ unsigned int cpu);
+int acpi_processor_ffh_cstate_probe(unsigned int cpu,
+ struct acpi_processor_cx *cx,
+ struct acpi_power_register *reg);
+void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
+#else
+static inline void acpi_processor_power_init_bm_check(struct
+ acpi_processor_flags
+ *flags, unsigned int cpu)
+{
+ flags->bm_check = 1;
+ return;
+}
+static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
+ struct acpi_processor_cx *cx,
+ struct acpi_power_register
+ *reg)
+{
+ return -1;
+}
+static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
+ *cstate)
+{
+ return;
+}
+#endif
+
+/* in processor_perflib.c */
+
+#ifdef CONFIG_CPU_FREQ
+void acpi_processor_ppc_init(void);
+void acpi_processor_ppc_exit(void);
+int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
+extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
+#else
+static inline void acpi_processor_ppc_init(void)
+{
+ return;
+}
+static inline void acpi_processor_ppc_exit(void)
+{
+ return;
+}
+static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
+ int event_flag)
+{
+ static unsigned int printout = 1;
+ if (printout) {
+ printk(KERN_WARNING
+ "Warning: Processor Platform Limit event detected, but not handled.\n");
+ printk(KERN_WARNING
+ "Consider compiling CPUfreq support into your kernel.\n");
+ printout = 0;
+ }
+ return 0;
+}
+static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
+{
+ return -ENODEV;
+}
+
+#endif /* CONFIG_CPU_FREQ */
+
+/* in processor_core.c */
+phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
+int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id);
+int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
+
+/* in processor_pdc.c */
+void acpi_processor_set_pdc(acpi_handle handle);
+
+/* in processor_throttling.c */
+int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
+int acpi_processor_get_throttling_info(struct acpi_processor *pr);
+extern int acpi_processor_set_throttling(struct acpi_processor *pr,
+ int state, bool force);
+/*
+ * Reevaluate whether the T-state is invalid after one cpu is
+ * onlined/offlined. In such case the flags.throttling will be updated.
+ */
+extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
+ unsigned long action);
+extern const struct file_operations acpi_processor_throttling_fops;
+extern void acpi_processor_throttling_init(void);
+/* in processor_idle.c */
+int acpi_processor_power_init(struct acpi_processor *pr);
+int acpi_processor_power_exit(struct acpi_processor *pr);
+int acpi_processor_cst_has_changed(struct acpi_processor *pr);
+int acpi_processor_hotplug(struct acpi_processor *pr);
+extern struct cpuidle_driver acpi_idle_driver;
+
+#ifdef CONFIG_PM_SLEEP
+void acpi_processor_syscore_init(void);
+void acpi_processor_syscore_exit(void);
+#else
+static inline void acpi_processor_syscore_init(void) {}
+static inline void acpi_processor_syscore_exit(void) {}
+#endif
+
+/* in processor_thermal.c */
+int acpi_processor_get_limit_info(struct acpi_processor *pr);
+extern const struct thermal_cooling_device_ops processor_cooling_ops;
+#ifdef CONFIG_CPU_FREQ
+void acpi_thermal_cpufreq_init(void);
+void acpi_thermal_cpufreq_exit(void);
+#else
+static inline void acpi_thermal_cpufreq_init(void)
+{
+ return;
+}
+static inline void acpi_thermal_cpufreq_exit(void)
+{
+ return;
+}
+#endif
+
+#endif
Code Review / kvmfornfv.git / blobdiff