Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 2 | * acpi-cpufreq.c - ACPI Processor P-States Driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * Copyright (C) 2002 - 2004 Dominik Brodowski <linux@brodo.de> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 7 | * Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or (at |
| 14 | * your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, but |
| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License along |
| 22 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 24 | * |
| 25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 26 | */ |
| 27 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/kernel.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 31 | #include <linux/smp.h> |
| 32 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/cpufreq.h> |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 34 | #include <linux/compiler.h> |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 35 | #include <linux/dmi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | #include <linux/acpi.h> |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 39 | #include <linux/io.h> |
| 40 | #include <linux/delay.h> |
| 41 | #include <linux/uaccess.h> |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <acpi/processor.h> |
| 44 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 45 | #include <asm/msr.h> |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 46 | #include <asm/processor.h> |
| 47 | #include <asm/cpufeature.h> |
Mark Langsdorf | a2fed57 | 2010-03-18 18:41:46 +0100 | [diff] [blame] | 48 | #include "mperf.h" |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski"); |
| 51 | MODULE_DESCRIPTION("ACPI Processor P-States Driver"); |
| 52 | MODULE_LICENSE("GPL"); |
| 53 | |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 54 | #define PFX "acpi-cpufreq: " |
| 55 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 56 | enum { |
| 57 | UNDEFINED_CAPABLE = 0, |
| 58 | SYSTEM_INTEL_MSR_CAPABLE, |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 59 | SYSTEM_AMD_MSR_CAPABLE, |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 60 | SYSTEM_IO_CAPABLE, |
| 61 | }; |
| 62 | |
| 63 | #define INTEL_MSR_RANGE (0xffff) |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 64 | #define AMD_MSR_RANGE (0x7) |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 65 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 66 | #define MSR_K7_HWCR_CPB_DIS (1ULL << 25) |
| 67 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 68 | struct acpi_cpufreq_data { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 69 | struct acpi_processor_performance *acpi_data; |
| 70 | struct cpufreq_frequency_table *freq_table; |
| 71 | unsigned int resume; |
| 72 | unsigned int cpu_feature; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | }; |
| 74 | |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 75 | static DEFINE_PER_CPU(struct acpi_cpufreq_data *, acfreq_data); |
travis@sgi.com | ea348f3 | 2008-01-30 13:33:12 +0100 | [diff] [blame] | 76 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 77 | /* acpi_perf_data is a pointer to percpu data. */ |
Namhyung Kim | 3f6c4df | 2010-08-13 23:00:11 +0900 | [diff] [blame] | 78 | static struct acpi_processor_performance __percpu *acpi_perf_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | static struct cpufreq_driver acpi_cpufreq_driver; |
| 81 | |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 82 | static unsigned int acpi_pstate_strict; |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 83 | static bool boost_enabled, boost_supported; |
| 84 | static struct msr __percpu *msrs; |
| 85 | |
| 86 | static bool boost_state(unsigned int cpu) |
| 87 | { |
| 88 | u32 lo, hi; |
| 89 | u64 msr; |
| 90 | |
| 91 | switch (boot_cpu_data.x86_vendor) { |
| 92 | case X86_VENDOR_INTEL: |
| 93 | rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi); |
| 94 | msr = lo | ((u64)hi << 32); |
| 95 | return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE); |
| 96 | case X86_VENDOR_AMD: |
| 97 | rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi); |
| 98 | msr = lo | ((u64)hi << 32); |
| 99 | return !(msr & MSR_K7_HWCR_CPB_DIS); |
| 100 | } |
| 101 | return false; |
| 102 | } |
| 103 | |
| 104 | static void boost_set_msrs(bool enable, const struct cpumask *cpumask) |
| 105 | { |
| 106 | u32 cpu; |
| 107 | u32 msr_addr; |
| 108 | u64 msr_mask; |
| 109 | |
| 110 | switch (boot_cpu_data.x86_vendor) { |
| 111 | case X86_VENDOR_INTEL: |
| 112 | msr_addr = MSR_IA32_MISC_ENABLE; |
| 113 | msr_mask = MSR_IA32_MISC_ENABLE_TURBO_DISABLE; |
| 114 | break; |
| 115 | case X86_VENDOR_AMD: |
| 116 | msr_addr = MSR_K7_HWCR; |
| 117 | msr_mask = MSR_K7_HWCR_CPB_DIS; |
| 118 | break; |
| 119 | default: |
| 120 | return; |
| 121 | } |
| 122 | |
| 123 | rdmsr_on_cpus(cpumask, msr_addr, msrs); |
| 124 | |
| 125 | for_each_cpu(cpu, cpumask) { |
| 126 | struct msr *reg = per_cpu_ptr(msrs, cpu); |
| 127 | if (enable) |
| 128 | reg->q &= ~msr_mask; |
| 129 | else |
| 130 | reg->q |= msr_mask; |
| 131 | } |
| 132 | |
| 133 | wrmsr_on_cpus(cpumask, msr_addr, msrs); |
| 134 | } |
| 135 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 136 | static ssize_t _store_boost(const char *buf, size_t count) |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 137 | { |
| 138 | int ret; |
| 139 | unsigned long val = 0; |
| 140 | |
| 141 | if (!boost_supported) |
| 142 | return -EINVAL; |
| 143 | |
| 144 | ret = kstrtoul(buf, 10, &val); |
| 145 | if (ret || (val > 1)) |
| 146 | return -EINVAL; |
| 147 | |
| 148 | if ((val && boost_enabled) || (!val && !boost_enabled)) |
| 149 | return count; |
| 150 | |
| 151 | get_online_cpus(); |
| 152 | |
| 153 | boost_set_msrs(val, cpu_online_mask); |
| 154 | |
| 155 | put_online_cpus(); |
| 156 | |
| 157 | boost_enabled = val; |
| 158 | pr_debug("Core Boosting %sabled.\n", val ? "en" : "dis"); |
| 159 | |
| 160 | return count; |
| 161 | } |
| 162 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 163 | static ssize_t store_global_boost(struct kobject *kobj, struct attribute *attr, |
| 164 | const char *buf, size_t count) |
| 165 | { |
| 166 | return _store_boost(buf, count); |
| 167 | } |
| 168 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 169 | static ssize_t show_global_boost(struct kobject *kobj, |
| 170 | struct attribute *attr, char *buf) |
| 171 | { |
| 172 | return sprintf(buf, "%u\n", boost_enabled); |
| 173 | } |
| 174 | |
| 175 | static struct global_attr global_boost = __ATTR(boost, 0644, |
| 176 | show_global_boost, |
| 177 | store_global_boost); |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 178 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 179 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
| 180 | static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf, |
| 181 | size_t count) |
| 182 | { |
| 183 | return _store_boost(buf, count); |
| 184 | } |
| 185 | |
| 186 | static ssize_t show_cpb(struct cpufreq_policy *policy, char *buf) |
| 187 | { |
| 188 | return sprintf(buf, "%u\n", boost_enabled); |
| 189 | } |
| 190 | |
| 191 | static struct freq_attr cpb = __ATTR(cpb, 0644, show_cpb, store_cpb); |
| 192 | #endif |
| 193 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 194 | static int check_est_cpu(unsigned int cpuid) |
| 195 | { |
Mike Travis | 92cb761 | 2007-10-19 20:35:04 +0200 | [diff] [blame] | 196 | struct cpuinfo_x86 *cpu = &cpu_data(cpuid); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 197 | |
Harald Welte | 0de5108 | 2009-06-08 18:27:54 +0800 | [diff] [blame] | 198 | return cpu_has(cpu, X86_FEATURE_EST); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 199 | } |
| 200 | |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 201 | static int check_amd_hwpstate_cpu(unsigned int cpuid) |
| 202 | { |
| 203 | struct cpuinfo_x86 *cpu = &cpu_data(cpuid); |
| 204 | |
| 205 | return cpu_has(cpu, X86_FEATURE_HW_PSTATE); |
| 206 | } |
| 207 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 208 | static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 209 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 210 | struct acpi_processor_performance *perf; |
| 211 | int i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 212 | |
| 213 | perf = data->acpi_data; |
| 214 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 215 | for (i = 0; i < perf->state_count; i++) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 216 | if (value == perf->states[i].status) |
| 217 | return data->freq_table[i].frequency; |
| 218 | } |
| 219 | return 0; |
| 220 | } |
| 221 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 222 | static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data) |
| 223 | { |
| 224 | int i; |
Venkatesh Pallipadi | a6f6e6e6 | 2006-10-03 12:37:42 -0700 | [diff] [blame] | 225 | struct acpi_processor_performance *perf; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 226 | |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 227 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) |
| 228 | msr &= AMD_MSR_RANGE; |
| 229 | else |
| 230 | msr &= INTEL_MSR_RANGE; |
| 231 | |
Venkatesh Pallipadi | a6f6e6e6 | 2006-10-03 12:37:42 -0700 | [diff] [blame] | 232 | perf = data->acpi_data; |
| 233 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 234 | for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) { |
Viresh Kumar | 5070158 | 2013-03-30 16:25:15 +0530 | [diff] [blame] | 235 | if (msr == perf->states[data->freq_table[i].driver_data].status) |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 236 | return data->freq_table[i].frequency; |
| 237 | } |
| 238 | return data->freq_table[0].frequency; |
| 239 | } |
| 240 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 241 | static unsigned extract_freq(u32 val, struct acpi_cpufreq_data *data) |
| 242 | { |
| 243 | switch (data->cpu_feature) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 244 | case SYSTEM_INTEL_MSR_CAPABLE: |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 245 | case SYSTEM_AMD_MSR_CAPABLE: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 246 | return extract_msr(val, data); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 247 | case SYSTEM_IO_CAPABLE: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 248 | return extract_io(val, data); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 249 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 250 | return 0; |
| 251 | } |
| 252 | } |
| 253 | |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 254 | struct msr_addr { |
| 255 | u32 reg; |
| 256 | }; |
| 257 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 258 | struct io_addr { |
| 259 | u16 port; |
| 260 | u8 bit_width; |
| 261 | }; |
| 262 | |
| 263 | struct drv_cmd { |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 264 | unsigned int type; |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 265 | const struct cpumask *mask; |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 266 | union { |
| 267 | struct msr_addr msr; |
| 268 | struct io_addr io; |
| 269 | } addr; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 270 | u32 val; |
| 271 | }; |
| 272 | |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 273 | /* Called via smp_call_function_single(), on the target CPU */ |
| 274 | static void do_drv_read(void *_cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 275 | { |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 276 | struct drv_cmd *cmd = _cmd; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 277 | u32 h; |
| 278 | |
| 279 | switch (cmd->type) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 280 | case SYSTEM_INTEL_MSR_CAPABLE: |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 281 | case SYSTEM_AMD_MSR_CAPABLE: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 282 | rdmsr(cmd->addr.msr.reg, cmd->val, h); |
| 283 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 284 | case SYSTEM_IO_CAPABLE: |
Venkatesh Pallipadi | 4e581ff | 2006-12-13 10:41:16 -0800 | [diff] [blame] | 285 | acpi_os_read_port((acpi_io_address)cmd->addr.io.port, |
| 286 | &cmd->val, |
| 287 | (u32)cmd->addr.io.bit_width); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 288 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 289 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 290 | break; |
| 291 | } |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 292 | } |
| 293 | |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 294 | /* Called via smp_call_function_many(), on the target CPUs */ |
| 295 | static void do_drv_write(void *_cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 296 | { |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 297 | struct drv_cmd *cmd = _cmd; |
Venki Pallipadi | 13424f6 | 2007-05-23 15:42:13 -0700 | [diff] [blame] | 298 | u32 lo, hi; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 299 | |
| 300 | switch (cmd->type) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 301 | case SYSTEM_INTEL_MSR_CAPABLE: |
Venki Pallipadi | 13424f6 | 2007-05-23 15:42:13 -0700 | [diff] [blame] | 302 | rdmsr(cmd->addr.msr.reg, lo, hi); |
| 303 | lo = (lo & ~INTEL_MSR_RANGE) | (cmd->val & INTEL_MSR_RANGE); |
| 304 | wrmsr(cmd->addr.msr.reg, lo, hi); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 305 | break; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 306 | case SYSTEM_AMD_MSR_CAPABLE: |
| 307 | wrmsr(cmd->addr.msr.reg, cmd->val, 0); |
| 308 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 309 | case SYSTEM_IO_CAPABLE: |
Venkatesh Pallipadi | 4e581ff | 2006-12-13 10:41:16 -0800 | [diff] [blame] | 310 | acpi_os_write_port((acpi_io_address)cmd->addr.io.port, |
| 311 | cmd->val, |
| 312 | (u32)cmd->addr.io.bit_width); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 313 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 314 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 315 | break; |
| 316 | } |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 317 | } |
| 318 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 319 | static void drv_read(struct drv_cmd *cmd) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 320 | { |
Andrew Morton | 4a28395 | 2009-12-21 16:19:58 -0800 | [diff] [blame] | 321 | int err; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 322 | cmd->val = 0; |
| 323 | |
Andrew Morton | 4a28395 | 2009-12-21 16:19:58 -0800 | [diff] [blame] | 324 | err = smp_call_function_any(cmd->mask, do_drv_read, cmd, 1); |
| 325 | WARN_ON_ONCE(err); /* smp_call_function_any() was buggy? */ |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | static void drv_write(struct drv_cmd *cmd) |
| 329 | { |
Linus Torvalds | ea34f43 | 2009-04-15 08:05:13 -0700 | [diff] [blame] | 330 | int this_cpu; |
| 331 | |
| 332 | this_cpu = get_cpu(); |
| 333 | if (cpumask_test_cpu(this_cpu, cmd->mask)) |
| 334 | do_drv_write(cmd); |
Andrew Morton | 01599fc | 2009-04-13 10:27:49 -0700 | [diff] [blame] | 335 | smp_call_function_many(cmd->mask, do_drv_write, cmd, 1); |
Linus Torvalds | ea34f43 | 2009-04-15 08:05:13 -0700 | [diff] [blame] | 336 | put_cpu(); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 337 | } |
| 338 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 339 | static u32 get_cur_val(const struct cpumask *mask) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 340 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 341 | struct acpi_processor_performance *perf; |
| 342 | struct drv_cmd cmd; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 343 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 344 | if (unlikely(cpumask_empty(mask))) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 345 | return 0; |
| 346 | |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 347 | switch (per_cpu(acfreq_data, cpumask_first(mask))->cpu_feature) { |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 348 | case SYSTEM_INTEL_MSR_CAPABLE: |
| 349 | cmd.type = SYSTEM_INTEL_MSR_CAPABLE; |
| 350 | cmd.addr.msr.reg = MSR_IA32_PERF_STATUS; |
| 351 | break; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 352 | case SYSTEM_AMD_MSR_CAPABLE: |
| 353 | cmd.type = SYSTEM_AMD_MSR_CAPABLE; |
| 354 | cmd.addr.msr.reg = MSR_AMD_PERF_STATUS; |
| 355 | break; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 356 | case SYSTEM_IO_CAPABLE: |
| 357 | cmd.type = SYSTEM_IO_CAPABLE; |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 358 | perf = per_cpu(acfreq_data, cpumask_first(mask))->acpi_data; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 359 | cmd.addr.io.port = perf->control_register.address; |
| 360 | cmd.addr.io.bit_width = perf->control_register.bit_width; |
| 361 | break; |
| 362 | default: |
| 363 | return 0; |
| 364 | } |
| 365 | |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 366 | cmd.mask = mask; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 367 | drv_read(&cmd); |
| 368 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 369 | pr_debug("get_cur_val = %u\n", cmd.val); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 370 | |
| 371 | return cmd.val; |
| 372 | } |
| 373 | |
| 374 | static unsigned int get_cur_freq_on_cpu(unsigned int cpu) |
| 375 | { |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 376 | struct acpi_cpufreq_data *data = per_cpu(acfreq_data, cpu); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 377 | unsigned int freq; |
Venkatesh Pallipadi | e56a727 | 2008-04-28 15:13:43 -0400 | [diff] [blame] | 378 | unsigned int cached_freq; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 379 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 380 | pr_debug("get_cur_freq_on_cpu (%d)\n", cpu); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 381 | |
| 382 | if (unlikely(data == NULL || |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 383 | data->acpi_data == NULL || data->freq_table == NULL)) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 384 | return 0; |
| 385 | } |
| 386 | |
Venkatesh Pallipadi | e56a727 | 2008-04-28 15:13:43 -0400 | [diff] [blame] | 387 | cached_freq = data->freq_table[data->acpi_data->state].frequency; |
Mike Travis | e39ad41 | 2009-01-04 05:18:10 -0800 | [diff] [blame] | 388 | freq = extract_freq(get_cur_val(cpumask_of(cpu)), data); |
Venkatesh Pallipadi | e56a727 | 2008-04-28 15:13:43 -0400 | [diff] [blame] | 389 | if (freq != cached_freq) { |
| 390 | /* |
| 391 | * The dreaded BIOS frequency change behind our back. |
| 392 | * Force set the frequency on next target call. |
| 393 | */ |
| 394 | data->resume = 1; |
| 395 | } |
| 396 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 397 | pr_debug("cur freq = %u\n", freq); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 398 | |
| 399 | return freq; |
| 400 | } |
| 401 | |
Mike Travis | 7285908 | 2009-01-16 15:31:15 -0800 | [diff] [blame] | 402 | static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq, |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 403 | struct acpi_cpufreq_data *data) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 404 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 405 | unsigned int cur_freq; |
| 406 | unsigned int i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 407 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 408 | for (i = 0; i < 100; i++) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 409 | cur_freq = extract_freq(get_cur_val(mask), data); |
| 410 | if (cur_freq == freq) |
| 411 | return 1; |
| 412 | udelay(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
| 414 | return 0; |
| 415 | } |
| 416 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 417 | static int acpi_cpufreq_target(struct cpufreq_policy *policy, |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 418 | unsigned int target_freq, unsigned int relation) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | { |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 420 | struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 421 | struct acpi_processor_performance *perf; |
| 422 | struct cpufreq_freqs freqs; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 423 | struct drv_cmd cmd; |
Venkatesh Pallipadi | 8edc59d9 | 2006-12-19 12:58:55 -0800 | [diff] [blame] | 424 | unsigned int next_state = 0; /* Index into freq_table */ |
| 425 | unsigned int next_perf_state = 0; /* Index into perf table */ |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 426 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 428 | pr_debug("acpi_cpufreq_target %d (%d)\n", target_freq, policy->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 430 | if (unlikely(data == NULL || |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 431 | data->acpi_data == NULL || data->freq_table == NULL)) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 432 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | } |
| 434 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 435 | perf = data->acpi_data; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 436 | result = cpufreq_frequency_table_target(policy, |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 437 | data->freq_table, |
| 438 | target_freq, |
| 439 | relation, &next_state); |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 440 | if (unlikely(result)) { |
| 441 | result = -ENODEV; |
| 442 | goto out; |
| 443 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 444 | |
Viresh Kumar | 5070158 | 2013-03-30 16:25:15 +0530 | [diff] [blame] | 445 | next_perf_state = data->freq_table[next_state].driver_data; |
Venkatesh Pallipadi | 7650b28 | 2006-10-03 12:36:30 -0700 | [diff] [blame] | 446 | if (perf->state == next_perf_state) { |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 447 | if (unlikely(data->resume)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 448 | pr_debug("Called after resume, resetting to P%d\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 449 | next_perf_state); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 450 | data->resume = 0; |
| 451 | } else { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 452 | pr_debug("Already at target state (P%d)\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 453 | next_perf_state); |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 454 | goto out; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 455 | } |
| 456 | } |
| 457 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 458 | switch (data->cpu_feature) { |
| 459 | case SYSTEM_INTEL_MSR_CAPABLE: |
| 460 | cmd.type = SYSTEM_INTEL_MSR_CAPABLE; |
| 461 | cmd.addr.msr.reg = MSR_IA32_PERF_CTL; |
Venki Pallipadi | 13424f6 | 2007-05-23 15:42:13 -0700 | [diff] [blame] | 462 | cmd.val = (u32) perf->states[next_perf_state].control; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 463 | break; |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 464 | case SYSTEM_AMD_MSR_CAPABLE: |
| 465 | cmd.type = SYSTEM_AMD_MSR_CAPABLE; |
| 466 | cmd.addr.msr.reg = MSR_AMD_PERF_CTL; |
| 467 | cmd.val = (u32) perf->states[next_perf_state].control; |
| 468 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 469 | case SYSTEM_IO_CAPABLE: |
| 470 | cmd.type = SYSTEM_IO_CAPABLE; |
| 471 | cmd.addr.io.port = perf->control_register.address; |
| 472 | cmd.addr.io.bit_width = perf->control_register.bit_width; |
| 473 | cmd.val = (u32) perf->states[next_perf_state].control; |
| 474 | break; |
| 475 | default: |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 476 | result = -ENODEV; |
| 477 | goto out; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 478 | } |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 479 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 480 | /* cpufreq holds the hotplug lock, so we are safe from here on */ |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 481 | if (policy->shared_type != CPUFREQ_SHARED_TYPE_ANY) |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 482 | cmd.mask = policy->cpus; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 483 | else |
Ingo Molnar | bfa318a | 2009-01-15 15:46:08 +0100 | [diff] [blame] | 484 | cmd.mask = cpumask_of(policy->cpu); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 485 | |
Venkatesh Pallipadi | 8edc59d9 | 2006-12-19 12:58:55 -0800 | [diff] [blame] | 486 | freqs.old = perf->states[perf->state].core_frequency * 1000; |
| 487 | freqs.new = data->freq_table[next_state].frequency; |
Viresh Kumar | b43a7ff | 2013-03-24 11:56:43 +0530 | [diff] [blame] | 488 | cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 489 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 490 | drv_write(&cmd); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 491 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 492 | if (acpi_pstate_strict) { |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 493 | if (!check_freqs(cmd.mask, freqs.new, data)) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 494 | pr_debug("acpi_cpufreq_target failed (%d)\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 495 | policy->cpu); |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 496 | result = -EAGAIN; |
Viresh Kumar | e15d830 | 2013-06-19 14:22:55 +0530 | [diff] [blame^] | 497 | freqs.new = freqs.old; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 498 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 499 | } |
| 500 | |
Viresh Kumar | b43a7ff | 2013-03-24 11:56:43 +0530 | [diff] [blame] | 501 | cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); |
Viresh Kumar | e15d830 | 2013-06-19 14:22:55 +0530 | [diff] [blame^] | 502 | |
| 503 | if (!result) |
| 504 | perf->state = next_perf_state; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 505 | |
Mike Travis | 4d8bb53 | 2009-01-04 05:18:08 -0800 | [diff] [blame] | 506 | out: |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 507 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
| 509 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 510 | static int acpi_cpufreq_verify(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | { |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 512 | struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 514 | pr_debug("acpi_cpufreq_verify\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 516 | return cpufreq_frequency_table_verify(policy, data->freq_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } |
| 518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | static unsigned long |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 520 | acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 522 | struct acpi_processor_performance *perf = data->acpi_data; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | if (cpu_khz) { |
| 525 | /* search the closest match to cpu_khz */ |
| 526 | unsigned int i; |
| 527 | unsigned long freq; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 528 | unsigned long freqn = perf->states[0].core_frequency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 530 | for (i = 0; i < (perf->state_count-1); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | freq = freqn; |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 532 | freqn = perf->states[i+1].core_frequency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if ((2 * cpu_khz) > (freqn + freq)) { |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 534 | perf->state = i; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 535 | return freq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | } |
| 537 | } |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 538 | perf->state = perf->state_count-1; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 539 | return freqn; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 540 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | /* assume CPU is at P0... */ |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 542 | perf->state = 0; |
| 543 | return perf->states[0].core_frequency * 1000; |
| 544 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
| 546 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 547 | static void free_acpi_perf_data(void) |
| 548 | { |
| 549 | unsigned int i; |
| 550 | |
| 551 | /* Freeing a NULL pointer is OK, and alloc_percpu zeroes. */ |
| 552 | for_each_possible_cpu(i) |
| 553 | free_cpumask_var(per_cpu_ptr(acpi_perf_data, i) |
| 554 | ->shared_cpu_map); |
| 555 | free_percpu(acpi_perf_data); |
| 556 | } |
| 557 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 558 | static int boost_notify(struct notifier_block *nb, unsigned long action, |
| 559 | void *hcpu) |
| 560 | { |
| 561 | unsigned cpu = (long)hcpu; |
| 562 | const struct cpumask *cpumask; |
| 563 | |
| 564 | cpumask = get_cpu_mask(cpu); |
| 565 | |
| 566 | /* |
| 567 | * Clear the boost-disable bit on the CPU_DOWN path so that |
| 568 | * this cpu cannot block the remaining ones from boosting. On |
| 569 | * the CPU_UP path we simply keep the boost-disable flag in |
| 570 | * sync with the current global state. |
| 571 | */ |
| 572 | |
| 573 | switch (action) { |
| 574 | case CPU_UP_PREPARE: |
| 575 | case CPU_UP_PREPARE_FROZEN: |
| 576 | boost_set_msrs(boost_enabled, cpumask); |
| 577 | break; |
| 578 | |
| 579 | case CPU_DOWN_PREPARE: |
| 580 | case CPU_DOWN_PREPARE_FROZEN: |
| 581 | boost_set_msrs(1, cpumask); |
| 582 | break; |
| 583 | |
| 584 | default: |
| 585 | break; |
| 586 | } |
| 587 | |
| 588 | return NOTIFY_OK; |
| 589 | } |
| 590 | |
| 591 | |
| 592 | static struct notifier_block boost_nb = { |
| 593 | .notifier_call = boost_notify, |
| 594 | }; |
| 595 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 596 | /* |
| 597 | * acpi_cpufreq_early_init - initialize ACPI P-States library |
| 598 | * |
| 599 | * Initialize the ACPI P-States library (drivers/acpi/processor_perflib.c) |
| 600 | * in order to determine correct frequency and voltage pairings. We can |
| 601 | * do _PDC and _PSD and find out the processor dependency for the |
| 602 | * actual init that will happen later... |
| 603 | */ |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 604 | static int __init acpi_cpufreq_early_init(void) |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 605 | { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 606 | unsigned int i; |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 607 | pr_debug("acpi_cpufreq_early_init\n"); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 608 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 609 | acpi_perf_data = alloc_percpu(struct acpi_processor_performance); |
| 610 | if (!acpi_perf_data) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 611 | pr_debug("Memory allocation error for acpi_perf_data.\n"); |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 612 | return -ENOMEM; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 613 | } |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 614 | for_each_possible_cpu(i) { |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 615 | if (!zalloc_cpumask_var_node( |
Mike Travis | 80855f7 | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 616 | &per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map, |
| 617 | GFP_KERNEL, cpu_to_node(i))) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 618 | |
| 619 | /* Freeing a NULL pointer is OK: alloc_percpu zeroes. */ |
| 620 | free_acpi_perf_data(); |
| 621 | return -ENOMEM; |
| 622 | } |
| 623 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 624 | |
| 625 | /* Do initialization in ACPI core */ |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 626 | acpi_processor_preregister_performance(acpi_perf_data); |
| 627 | return 0; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 628 | } |
| 629 | |
Dave Jones | 95625b8 | 2006-10-21 01:37:39 -0400 | [diff] [blame] | 630 | #ifdef CONFIG_SMP |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 631 | /* |
| 632 | * Some BIOSes do SW_ANY coordination internally, either set it up in hw |
| 633 | * or do it in BIOS firmware and won't inform about it to OS. If not |
| 634 | * detected, this has a side effect of making CPU run at a different speed |
| 635 | * than OS intended it to run at. Detect it and handle it cleanly. |
| 636 | */ |
| 637 | static int bios_with_sw_any_bug; |
| 638 | |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 639 | static int sw_any_bug_found(const struct dmi_system_id *d) |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 640 | { |
| 641 | bios_with_sw_any_bug = 1; |
| 642 | return 0; |
| 643 | } |
| 644 | |
Jeff Garzik | 1855256 | 2007-10-03 15:15:40 -0400 | [diff] [blame] | 645 | static const struct dmi_system_id sw_any_bug_dmi_table[] = { |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 646 | { |
| 647 | .callback = sw_any_bug_found, |
| 648 | .ident = "Supermicro Server X6DLP", |
| 649 | .matches = { |
| 650 | DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"), |
| 651 | DMI_MATCH(DMI_BIOS_VERSION, "080010"), |
| 652 | DMI_MATCH(DMI_PRODUCT_NAME, "X6DLP"), |
| 653 | }, |
| 654 | }, |
| 655 | { } |
| 656 | }; |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 657 | |
| 658 | static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c) |
| 659 | { |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 660 | /* Intel Xeon Processor 7100 Series Specification Update |
| 661 | * http://www.intel.com/Assets/PDF/specupdate/314554.pdf |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 662 | * AL30: A Machine Check Exception (MCE) Occurring during an |
| 663 | * Enhanced Intel SpeedStep Technology Ratio Change May Cause |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 664 | * Both Processor Cores to Lock Up. */ |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 665 | if (c->x86_vendor == X86_VENDOR_INTEL) { |
| 666 | if ((c->x86 == 15) && |
| 667 | (c->x86_model == 6) && |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 668 | (c->x86_mask == 8)) { |
| 669 | printk(KERN_INFO "acpi-cpufreq: Intel(R) " |
| 670 | "Xeon(R) 7100 Errata AL30, processors may " |
| 671 | "lock up on frequency changes: disabling " |
| 672 | "acpi-cpufreq.\n"); |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 673 | return -ENODEV; |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 674 | } |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 675 | } |
| 676 | return 0; |
| 677 | } |
Dave Jones | 95625b8 | 2006-10-21 01:37:39 -0400 | [diff] [blame] | 678 | #endif |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 679 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 680 | static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 682 | unsigned int i; |
| 683 | unsigned int valid_states = 0; |
| 684 | unsigned int cpu = policy->cpu; |
| 685 | struct acpi_cpufreq_data *data; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 686 | unsigned int result = 0; |
Mike Travis | 92cb761 | 2007-10-19 20:35:04 +0200 | [diff] [blame] | 687 | struct cpuinfo_x86 *c = &cpu_data(policy->cpu); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 688 | struct acpi_processor_performance *perf; |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 689 | #ifdef CONFIG_SMP |
| 690 | static int blacklisted; |
| 691 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 693 | pr_debug("acpi_cpufreq_cpu_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 695 | #ifdef CONFIG_SMP |
John Villalovos | 293afe4 | 2009-09-25 13:30:08 -0400 | [diff] [blame] | 696 | if (blacklisted) |
| 697 | return blacklisted; |
| 698 | blacklisted = acpi_cpufreq_blacklist(c); |
| 699 | if (blacklisted) |
| 700 | return blacklisted; |
Prarit Bhargava | 1a8e42f | 2009-08-26 13:19:37 -0400 | [diff] [blame] | 701 | #endif |
| 702 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 703 | data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | if (!data) |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 705 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
Rusty Russell | b36128c | 2009-02-20 16:29:08 +0900 | [diff] [blame] | 707 | data->acpi_data = per_cpu_ptr(acpi_perf_data, cpu); |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 708 | per_cpu(acfreq_data, cpu) = data; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 709 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 710 | if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 711 | acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 713 | result = acpi_processor_register_performance(data->acpi_data, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | if (result) |
| 715 | goto err_free; |
| 716 | |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 717 | perf = data->acpi_data; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 718 | policy->shared_type = perf->shared_type; |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 719 | |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 720 | /* |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 721 | * Will let policy->cpus know about dependency only when software |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 722 | * coordination is required. |
| 723 | */ |
| 724 | if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL || |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 725 | policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) { |
Rusty Russell | 835481d | 2009-01-04 05:18:06 -0800 | [diff] [blame] | 726 | cpumask_copy(policy->cpus, perf->shared_cpu_map); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 727 | } |
| 728 | |
| 729 | #ifdef CONFIG_SMP |
| 730 | dmi_check_system(sw_any_bug_dmi_table); |
Fabio Baltieri | 2624f90 | 2013-01-31 09:44:40 +0000 | [diff] [blame] | 731 | if (bios_with_sw_any_bug && !policy_is_shared(policy)) { |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 732 | policy->shared_type = CPUFREQ_SHARED_TYPE_ALL; |
Rusty Russell | 835481d | 2009-01-04 05:18:06 -0800 | [diff] [blame] | 733 | cpumask_copy(policy->cpus, cpu_core_mask(cpu)); |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 734 | } |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 735 | |
| 736 | if (check_amd_hwpstate_cpu(cpu) && !acpi_pstate_strict) { |
| 737 | cpumask_clear(policy->cpus); |
| 738 | cpumask_set_cpu(cpu, policy->cpus); |
Andre Przywara | acd3162 | 2012-09-04 08:28:03 +0000 | [diff] [blame] | 739 | policy->shared_type = CPUFREQ_SHARED_TYPE_HW; |
| 740 | pr_info_once(PFX "overriding BIOS provided _PSD data\n"); |
| 741 | } |
Venkatesh Pallipadi | 8adcc0c | 2006-09-01 14:02:24 -0700 | [diff] [blame] | 742 | #endif |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | /* capability check */ |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 745 | if (perf->state_count <= 1) { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 746 | pr_debug("No P-States\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | result = -ENODEV; |
| 748 | goto err_unreg; |
| 749 | } |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 750 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 751 | if (perf->control_register.space_id != perf->status_register.space_id) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | result = -ENODEV; |
| 753 | goto err_unreg; |
| 754 | } |
| 755 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 756 | switch (perf->control_register.space_id) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 757 | case ACPI_ADR_SPACE_SYSTEM_IO: |
Matthew Garrett | c40a451 | 2013-01-20 10:24:26 +0000 | [diff] [blame] | 758 | if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && |
| 759 | boot_cpu_data.x86 == 0xf) { |
| 760 | pr_debug("AMD K8 systems must use native drivers.\n"); |
| 761 | result = -ENODEV; |
| 762 | goto err_unreg; |
| 763 | } |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 764 | pr_debug("SYSTEM IO addr space\n"); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 765 | data->cpu_feature = SYSTEM_IO_CAPABLE; |
| 766 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 767 | case ACPI_ADR_SPACE_FIXED_HARDWARE: |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 768 | pr_debug("HARDWARE addr space\n"); |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 769 | if (check_est_cpu(cpu)) { |
| 770 | data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE; |
| 771 | break; |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 772 | } |
Matthew Garrett | 3dc9a63 | 2012-09-04 08:28:02 +0000 | [diff] [blame] | 773 | if (check_amd_hwpstate_cpu(cpu)) { |
| 774 | data->cpu_feature = SYSTEM_AMD_MSR_CAPABLE; |
| 775 | break; |
| 776 | } |
| 777 | result = -ENODEV; |
| 778 | goto err_unreg; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 779 | default: |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 780 | pr_debug("Unknown addr space %d\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 781 | (u32) (perf->control_register.space_id)); |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 782 | result = -ENODEV; |
| 783 | goto err_unreg; |
| 784 | } |
| 785 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 786 | data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) * |
| 787 | (perf->state_count+1), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | if (!data->freq_table) { |
| 789 | result = -ENOMEM; |
| 790 | goto err_unreg; |
| 791 | } |
| 792 | |
| 793 | /* detect transition latency */ |
| 794 | policy->cpuinfo.transition_latency = 0; |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 795 | for (i = 0; i < perf->state_count; i++) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 796 | if ((perf->states[i].transition_latency * 1000) > |
| 797 | policy->cpuinfo.transition_latency) |
| 798 | policy->cpuinfo.transition_latency = |
| 799 | perf->states[i].transition_latency * 1000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 802 | /* Check for high latency (>20uS) from buggy BIOSes, like on T42 */ |
| 803 | if (perf->control_register.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE && |
| 804 | policy->cpuinfo.transition_latency > 20 * 1000) { |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 805 | policy->cpuinfo.transition_latency = 20 * 1000; |
Joe Perches | 61c8c67 | 2009-05-26 14:58:39 -0700 | [diff] [blame] | 806 | printk_once(KERN_INFO |
| 807 | "P-state transition latency capped at 20 uS\n"); |
Pallipadi, Venkatesh | a59d163 | 2009-03-19 14:41:40 -0700 | [diff] [blame] | 808 | } |
| 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | /* table init */ |
Dave Jones | 3a58df3 | 2009-01-17 22:36:14 -0500 | [diff] [blame] | 811 | for (i = 0; i < perf->state_count; i++) { |
| 812 | if (i > 0 && perf->states[i].core_frequency >= |
Zhang Rui | 3cdf552 | 2007-06-13 21:24:02 -0400 | [diff] [blame] | 813 | data->freq_table[valid_states-1].frequency / 1000) |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 814 | continue; |
| 815 | |
Viresh Kumar | 5070158 | 2013-03-30 16:25:15 +0530 | [diff] [blame] | 816 | data->freq_table[valid_states].driver_data = i; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 817 | data->freq_table[valid_states].frequency = |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 818 | perf->states[i].core_frequency * 1000; |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 819 | valid_states++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | } |
Venkatesh Pallipadi | 3d4a7ef | 2006-11-13 17:47:44 -0800 | [diff] [blame] | 821 | data->freq_table[valid_states].frequency = CPUFREQ_TABLE_END; |
Venkatesh Pallipadi | 8edc59d9 | 2006-12-19 12:58:55 -0800 | [diff] [blame] | 822 | perf->state = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
| 824 | result = cpufreq_frequency_table_cpuinfo(policy, data->freq_table); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 825 | if (result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | goto err_freqfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
Thomas Renninger | d876dfb | 2009-04-17 16:22:08 +0200 | [diff] [blame] | 828 | if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq) |
| 829 | printk(KERN_WARNING FW_WARN "P-state 0 is not max freq\n"); |
| 830 | |
Mattia Dongili | a507ac4 | 2006-12-15 19:52:45 +0100 | [diff] [blame] | 831 | switch (perf->control_register.space_id) { |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 832 | case ACPI_ADR_SPACE_SYSTEM_IO: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 833 | /* Current speed is unknown and not detectable by IO port */ |
| 834 | policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu); |
| 835 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 836 | case ACPI_ADR_SPACE_FIXED_HARDWARE: |
Venkatesh Pallipadi | 7650b28 | 2006-10-03 12:36:30 -0700 | [diff] [blame] | 837 | acpi_cpufreq_driver.get = get_cur_freq_on_cpu; |
Mattia Dongili | a507ac4 | 2006-12-15 19:52:45 +0100 | [diff] [blame] | 838 | policy->cur = get_cur_freq_on_cpu(cpu); |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 839 | break; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 840 | default: |
Venkatesh Pallipadi | dde9f7b | 2006-10-03 12:33:14 -0700 | [diff] [blame] | 841 | break; |
| 842 | } |
| 843 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | /* notify BIOS that we exist */ |
| 845 | acpi_processor_notify_smm(THIS_MODULE); |
| 846 | |
Venkatesh Pallipadi | dfde5d6 | 2006-10-03 12:38:45 -0700 | [diff] [blame] | 847 | /* Check for APERF/MPERF support in hardware */ |
Matthew Garrett | 92e03c4 | 2011-07-13 17:58:32 -0400 | [diff] [blame] | 848 | if (boot_cpu_has(X86_FEATURE_APERFMPERF)) |
Mark Langsdorf | a2fed57 | 2010-03-18 18:41:46 +0100 | [diff] [blame] | 849 | acpi_cpufreq_driver.getavg = cpufreq_get_measured_perf; |
Venkatesh Pallipadi | dfde5d6 | 2006-10-03 12:38:45 -0700 | [diff] [blame] | 850 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 851 | pr_debug("CPU%u - ACPI performance management activated.\n", cpu); |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 852 | for (i = 0; i < perf->state_count; i++) |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 853 | pr_debug(" %cP%d: %d MHz, %d mW, %d uS\n", |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 854 | (i == perf->state ? '*' : ' '), i, |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 855 | (u32) perf->states[i].core_frequency, |
| 856 | (u32) perf->states[i].power, |
| 857 | (u32) perf->states[i].transition_latency); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
| 859 | cpufreq_frequency_table_get_attr(data->freq_table, policy->cpu); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 860 | |
Dominik Brodowski | 4b31e77 | 2005-05-18 13:49:00 -0400 | [diff] [blame] | 861 | /* |
| 862 | * the first call to ->target() should result in us actually |
| 863 | * writing something to the appropriate registers. |
| 864 | */ |
| 865 | data->resume = 1; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 866 | |
Venkatesh Pallipadi | fe27cb3 | 2006-10-03 12:29:15 -0700 | [diff] [blame] | 867 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 869 | err_freqfree: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | kfree(data->freq_table); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 871 | err_unreg: |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 872 | acpi_processor_unregister_performance(perf, cpu); |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 873 | err_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | kfree(data); |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 875 | per_cpu(acfreq_data, cpu) = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 877 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | } |
| 879 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 880 | static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | { |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 882 | struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 884 | pr_debug("acpi_cpufreq_cpu_exit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
| 886 | if (data) { |
| 887 | cpufreq_frequency_table_put_attr(policy->cpu); |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 888 | per_cpu(acfreq_data, policy->cpu) = NULL; |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 889 | acpi_processor_unregister_performance(data->acpi_data, |
| 890 | policy->cpu); |
Zhang Rui | dab5fff | 2010-10-12 09:09:37 +0800 | [diff] [blame] | 891 | kfree(data->freq_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | kfree(data); |
| 893 | } |
| 894 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 895 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 898 | static int acpi_cpufreq_resume(struct cpufreq_policy *policy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | { |
Tejun Heo | f162506 | 2009-10-29 22:34:13 +0900 | [diff] [blame] | 900 | struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 902 | pr_debug("acpi_cpufreq_resume\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | data->resume = 1; |
| 905 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 906 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | } |
| 908 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 909 | static struct freq_attr *acpi_cpufreq_attr[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | &cpufreq_freq_attr_scaling_available_freqs, |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 911 | NULL, /* this is a placeholder for cpb, do not remove */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | NULL, |
| 913 | }; |
| 914 | |
| 915 | static struct cpufreq_driver acpi_cpufreq_driver = { |
Thomas Renninger | e2f74f3 | 2009-11-19 12:31:01 +0100 | [diff] [blame] | 916 | .verify = acpi_cpufreq_verify, |
| 917 | .target = acpi_cpufreq_target, |
| 918 | .bios_limit = acpi_processor_get_bios_limit, |
| 919 | .init = acpi_cpufreq_cpu_init, |
| 920 | .exit = acpi_cpufreq_cpu_exit, |
| 921 | .resume = acpi_cpufreq_resume, |
| 922 | .name = "acpi-cpufreq", |
| 923 | .owner = THIS_MODULE, |
| 924 | .attr = acpi_cpufreq_attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | }; |
| 926 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 927 | static void __init acpi_cpufreq_boost_init(void) |
| 928 | { |
| 929 | if (boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA)) { |
| 930 | msrs = msrs_alloc(); |
| 931 | |
| 932 | if (!msrs) |
| 933 | return; |
| 934 | |
| 935 | boost_supported = true; |
| 936 | boost_enabled = boost_state(0); |
| 937 | |
| 938 | get_online_cpus(); |
| 939 | |
| 940 | /* Force all MSRs to the same value */ |
| 941 | boost_set_msrs(boost_enabled, cpu_online_mask); |
| 942 | |
| 943 | register_cpu_notifier(&boost_nb); |
| 944 | |
| 945 | put_online_cpus(); |
| 946 | } else |
| 947 | global_boost.attr.mode = 0444; |
| 948 | |
| 949 | /* We create the boost file in any case, though for systems without |
| 950 | * hardware support it will be read-only and hardwired to return 0. |
| 951 | */ |
Viresh Kumar | 2361be2 | 2013-05-17 16:09:09 +0530 | [diff] [blame] | 952 | if (cpufreq_sysfs_create_file(&(global_boost.attr))) |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 953 | pr_warn(PFX "could not register global boost sysfs file\n"); |
| 954 | else |
| 955 | pr_debug("registered global boost sysfs file\n"); |
| 956 | } |
| 957 | |
| 958 | static void __exit acpi_cpufreq_boost_exit(void) |
| 959 | { |
Viresh Kumar | 2361be2 | 2013-05-17 16:09:09 +0530 | [diff] [blame] | 960 | cpufreq_sysfs_remove_file(&(global_boost.attr)); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 961 | |
| 962 | if (msrs) { |
| 963 | unregister_cpu_notifier(&boost_nb); |
| 964 | |
| 965 | msrs_free(msrs); |
| 966 | msrs = NULL; |
| 967 | } |
| 968 | } |
| 969 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 970 | static int __init acpi_cpufreq_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | { |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 972 | int ret; |
| 973 | |
Yinghai Lu | ee29753 | 2008-09-24 19:04:31 -0700 | [diff] [blame] | 974 | if (acpi_disabled) |
| 975 | return 0; |
| 976 | |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 977 | pr_debug("acpi_cpufreq_init\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 979 | ret = acpi_cpufreq_early_init(); |
| 980 | if (ret) |
| 981 | return ret; |
Venkatesh Pallipadi | 09b4d1e | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 982 | |
Andre Przywara | 11269ff | 2012-09-04 08:28:08 +0000 | [diff] [blame] | 983 | #ifdef CONFIG_X86_ACPI_CPUFREQ_CPB |
| 984 | /* this is a sysfs file with a strange name and an even stranger |
| 985 | * semantic - per CPU instantiation, but system global effect. |
| 986 | * Lets enable it only on AMD CPUs for compatibility reasons and |
| 987 | * only if configured. This is considered legacy code, which |
| 988 | * will probably be removed at some point in the future. |
| 989 | */ |
| 990 | if (check_amd_hwpstate_cpu(0)) { |
| 991 | struct freq_attr **iter; |
| 992 | |
| 993 | pr_debug("adding sysfs entry for cpb\n"); |
| 994 | |
| 995 | for (iter = acpi_cpufreq_attr; *iter != NULL; iter++) |
| 996 | ; |
| 997 | |
| 998 | /* make sure there is a terminator behind it */ |
| 999 | if (iter[1] == NULL) |
| 1000 | *iter = &cpb; |
| 1001 | } |
| 1002 | #endif |
| 1003 | |
Akinobu Mita | 847aef6 | 2008-07-14 11:59:44 +0900 | [diff] [blame] | 1004 | ret = cpufreq_register_driver(&acpi_cpufreq_driver); |
| 1005 | if (ret) |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 1006 | free_acpi_perf_data(); |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 1007 | else |
| 1008 | acpi_cpufreq_boost_init(); |
Akinobu Mita | 847aef6 | 2008-07-14 11:59:44 +0900 | [diff] [blame] | 1009 | |
| 1010 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | } |
| 1012 | |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 1013 | static void __exit acpi_cpufreq_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | { |
Dominik Brodowski | 2d06d8c | 2011-03-27 15:04:46 +0200 | [diff] [blame] | 1015 | pr_debug("acpi_cpufreq_exit\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
Andre Przywara | 615b730 | 2012-09-04 08:28:07 +0000 | [diff] [blame] | 1017 | acpi_cpufreq_boost_exit(); |
| 1018 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | cpufreq_unregister_driver(&acpi_cpufreq_driver); |
| 1020 | |
Luming Yu | 50f4ddd | 2011-07-08 16:37:44 -0400 | [diff] [blame] | 1021 | free_acpi_perf_data(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | } |
| 1023 | |
Venkatesh Pallipadi | d395bf1 | 2005-08-25 15:59:00 -0400 | [diff] [blame] | 1024 | module_param(acpi_pstate_strict, uint, 0644); |
Venkatesh Pallipadi | 64be7ee | 2006-10-03 12:35:23 -0700 | [diff] [blame] | 1025 | MODULE_PARM_DESC(acpi_pstate_strict, |
Dave Jones | 95dd722 | 2006-10-18 00:41:48 -0400 | [diff] [blame] | 1026 | "value 0 or non-zero. non-zero -> strict ACPI checks are " |
| 1027 | "performed during frequency changes."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | |
| 1029 | late_initcall(acpi_cpufreq_init); |
| 1030 | module_exit(acpi_cpufreq_exit); |
| 1031 | |
Matthew Garrett | efa1719 | 2013-01-22 22:33:46 +0100 | [diff] [blame] | 1032 | static const struct x86_cpu_id acpi_cpufreq_ids[] = { |
| 1033 | X86_FEATURE_MATCH(X86_FEATURE_ACPI), |
| 1034 | X86_FEATURE_MATCH(X86_FEATURE_HW_PSTATE), |
| 1035 | {} |
| 1036 | }; |
| 1037 | MODULE_DEVICE_TABLE(x86cpu, acpi_cpufreq_ids); |
| 1038 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | MODULE_ALIAS("acpi"); |