Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ACPI_PROCESSOR_H |
| 2 | #define __ACPI_PROCESSOR_H |
| 3 | |
| 4 | #include <linux/kernel.h> |
| 5 | #include <linux/config.h> |
| 6 | |
| 7 | #define ACPI_PROCESSOR_BUSY_METRIC 10 |
| 8 | |
| 9 | #define ACPI_PROCESSOR_MAX_POWER 8 |
| 10 | #define ACPI_PROCESSOR_MAX_C2_LATENCY 100 |
| 11 | #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000 |
| 12 | |
| 13 | #define ACPI_PROCESSOR_MAX_THROTTLING 16 |
| 14 | #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */ |
| 15 | #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4 |
| 16 | |
| 17 | /* Power Management */ |
| 18 | |
| 19 | struct acpi_processor_cx; |
| 20 | |
| 21 | struct acpi_power_register { |
| 22 | u8 descriptor; |
| 23 | u16 length; |
| 24 | u8 space_id; |
| 25 | u8 bit_width; |
| 26 | u8 bit_offset; |
| 27 | u8 reserved; |
| 28 | u64 address; |
| 29 | } __attribute__ ((packed)); |
| 30 | |
| 31 | |
| 32 | struct acpi_processor_cx_policy { |
| 33 | u32 count; |
| 34 | struct acpi_processor_cx *state; |
| 35 | struct { |
| 36 | u32 time; |
| 37 | u32 ticks; |
| 38 | u32 count; |
| 39 | u32 bm; |
| 40 | } threshold; |
| 41 | }; |
| 42 | |
| 43 | struct acpi_processor_cx { |
| 44 | u8 valid; |
| 45 | u8 type; |
| 46 | u32 address; |
| 47 | u32 latency; |
| 48 | u32 latency_ticks; |
| 49 | u32 power; |
| 50 | u32 usage; |
| 51 | struct acpi_processor_cx_policy promotion; |
| 52 | struct acpi_processor_cx_policy demotion; |
| 53 | }; |
| 54 | |
| 55 | struct acpi_processor_power { |
| 56 | struct acpi_processor_cx *state; |
| 57 | unsigned long bm_check_timestamp; |
| 58 | u32 default_state; |
| 59 | u32 bm_activity; |
| 60 | int count; |
| 61 | struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; |
| 62 | }; |
| 63 | |
| 64 | /* Performance Management */ |
| 65 | |
| 66 | struct acpi_pct_register { |
| 67 | u8 descriptor; |
| 68 | u16 length; |
| 69 | u8 space_id; |
| 70 | u8 bit_width; |
| 71 | u8 bit_offset; |
| 72 | u8 reserved; |
| 73 | u64 address; |
| 74 | } __attribute__ ((packed)); |
| 75 | |
| 76 | struct acpi_processor_px { |
| 77 | acpi_integer core_frequency; /* megahertz */ |
| 78 | acpi_integer power; /* milliWatts */ |
| 79 | acpi_integer transition_latency; /* microseconds */ |
| 80 | acpi_integer bus_master_latency; /* microseconds */ |
| 81 | acpi_integer control; /* control value */ |
| 82 | acpi_integer status; /* success indicator */ |
| 83 | }; |
| 84 | |
| 85 | #define ACPI_PDC_REVISION_ID 0x1 |
| 86 | |
| 87 | struct acpi_processor_performance { |
| 88 | unsigned int state; |
| 89 | unsigned int platform_limit; |
| 90 | struct acpi_pct_register control_register; |
| 91 | struct acpi_pct_register status_register; |
| 92 | unsigned int state_count; |
| 93 | struct acpi_processor_px *states; |
| 94 | |
| 95 | /* the _PDC objects passed by the driver, if any */ |
| 96 | struct acpi_object_list *pdc; |
| 97 | }; |
| 98 | |
| 99 | |
| 100 | |
| 101 | /* Throttling Control */ |
| 102 | |
| 103 | struct acpi_processor_tx { |
| 104 | u16 power; |
| 105 | u16 performance; |
| 106 | }; |
| 107 | |
| 108 | struct acpi_processor_throttling { |
| 109 | int state; |
| 110 | u32 address; |
| 111 | u8 duty_offset; |
| 112 | u8 duty_width; |
| 113 | int state_count; |
| 114 | struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; |
| 115 | }; |
| 116 | |
| 117 | /* Limit Interface */ |
| 118 | |
| 119 | struct acpi_processor_lx { |
| 120 | int px; /* performace state */ |
| 121 | int tx; /* throttle level */ |
| 122 | }; |
| 123 | |
| 124 | struct acpi_processor_limit { |
| 125 | struct acpi_processor_lx state; /* current limit */ |
| 126 | struct acpi_processor_lx thermal; /* thermal limit */ |
| 127 | struct acpi_processor_lx user; /* user limit */ |
| 128 | }; |
| 129 | |
| 130 | |
| 131 | struct acpi_processor_flags { |
| 132 | u8 power:1; |
| 133 | u8 performance:1; |
| 134 | u8 throttling:1; |
| 135 | u8 limit:1; |
| 136 | u8 bm_control:1; |
| 137 | u8 bm_check:1; |
| 138 | u8 has_cst:1; |
| 139 | u8 power_setup_done:1; |
| 140 | }; |
| 141 | |
| 142 | struct acpi_processor { |
| 143 | acpi_handle handle; |
| 144 | u32 acpi_id; |
| 145 | u32 id; |
| 146 | u32 pblk; |
| 147 | int performance_platform_limit; |
| 148 | struct acpi_processor_flags flags; |
| 149 | struct acpi_processor_power power; |
| 150 | struct acpi_processor_performance *performance; |
| 151 | struct acpi_processor_throttling throttling; |
| 152 | struct acpi_processor_limit limit; |
| 153 | }; |
| 154 | |
| 155 | struct acpi_processor_errata { |
| 156 | u8 smp; |
| 157 | struct { |
| 158 | u8 throttle:1; |
| 159 | u8 fdma:1; |
| 160 | u8 reserved:6; |
| 161 | u32 bmisx; |
| 162 | } piix4; |
| 163 | }; |
| 164 | |
| 165 | extern int acpi_processor_register_performance ( |
| 166 | struct acpi_processor_performance * performance, |
| 167 | unsigned int cpu); |
| 168 | extern void acpi_processor_unregister_performance ( |
| 169 | struct acpi_processor_performance * performance, |
| 170 | unsigned int cpu); |
| 171 | |
| 172 | /* note: this locks both the calling module and the processor module |
| 173 | if a _PPC object exists, rmmod is disallowed then */ |
| 174 | int acpi_processor_notify_smm(struct module *calling_module); |
| 175 | |
| 176 | |
| 177 | |
| 178 | /* for communication between multiple parts of the processor kernel module */ |
| 179 | extern struct acpi_processor *processors[NR_CPUS]; |
| 180 | extern struct acpi_processor_errata errata; |
| 181 | |
| 182 | /* in processor_perflib.c */ |
| 183 | #ifdef CONFIG_CPU_FREQ |
| 184 | void acpi_processor_ppc_init(void); |
| 185 | void acpi_processor_ppc_exit(void); |
| 186 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr); |
| 187 | #else |
| 188 | static inline void acpi_processor_ppc_init(void) { return; } |
| 189 | static inline void acpi_processor_ppc_exit(void) { return; } |
| 190 | static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr) { |
| 191 | static unsigned int printout = 1; |
| 192 | if (printout) { |
| 193 | printk(KERN_WARNING "Warning: Processor Platform Limit event detected, but not handled.\n"); |
| 194 | printk(KERN_WARNING "Consider compiling CPUfreq support into your kernel.\n"); |
| 195 | printout = 0; |
| 196 | } |
| 197 | return 0; |
| 198 | } |
| 199 | #endif /* CONFIG_CPU_FREQ */ |
| 200 | |
| 201 | /* in processor_throttling.c */ |
| 202 | int acpi_processor_get_throttling_info (struct acpi_processor *pr); |
| 203 | int acpi_processor_set_throttling (struct acpi_processor *pr, int state); |
| 204 | ssize_t acpi_processor_write_throttling ( |
| 205 | struct file *file, |
| 206 | const char __user *buffer, |
| 207 | size_t count, |
| 208 | loff_t *data); |
| 209 | extern struct file_operations acpi_processor_throttling_fops; |
| 210 | |
| 211 | /* in processor_idle.c */ |
| 212 | int acpi_processor_power_init(struct acpi_processor *pr, struct acpi_device *device); |
| 213 | int acpi_processor_cst_has_changed (struct acpi_processor *pr); |
| 214 | int acpi_processor_power_exit(struct acpi_processor *pr, struct acpi_device *device); |
| 215 | |
| 216 | |
| 217 | /* in processor_thermal.c */ |
| 218 | int acpi_processor_get_limit_info (struct acpi_processor *pr); |
| 219 | ssize_t acpi_processor_write_limit ( |
| 220 | struct file *file, |
| 221 | const char __user *buffer, |
| 222 | size_t count, |
| 223 | loff_t *data); |
| 224 | extern struct file_operations acpi_processor_limit_fops; |
| 225 | |
| 226 | #ifdef CONFIG_CPU_FREQ |
| 227 | void acpi_thermal_cpufreq_init(void); |
| 228 | void acpi_thermal_cpufreq_exit(void); |
| 229 | #else |
| 230 | static inline void acpi_thermal_cpufreq_init(void) { return; } |
| 231 | static inline void acpi_thermal_cpufreq_exit(void) { return; } |
| 232 | #endif |
| 233 | |
| 234 | |
| 235 | #endif |