Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * processor_perflib.c - ACPI Processor P-States Library ($Revision: 71 $) |
| 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) 2004 Dominik Brodowski <linux@brodo.de> |
| 7 | * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> |
| 8 | * - Added processor hotplug support |
| 9 | * |
| 10 | * |
| 11 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License as published by |
| 15 | * the Free Software Foundation; either version 2 of the License, or (at |
| 16 | * your option) any later version. |
| 17 | * |
| 18 | * This program is distributed in the hope that it will be useful, but |
| 19 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | * General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License along |
| 24 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 26 | * |
| 27 | */ |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/kernel.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/cpufreq.h> |
| 33 | |
| 34 | #ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF |
| 35 | #include <linux/proc_fs.h> |
| 36 | #include <linux/seq_file.h> |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 37 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <asm/uaccess.h> |
| 40 | #endif |
| 41 | |
| 42 | #include <acpi/acpi_bus.h> |
| 43 | #include <acpi/processor.h> |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
| 46 | #define ACPI_PROCESSOR_CLASS "processor" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #define ACPI_PROCESSOR_FILE_PERFORMANCE "performance" |
| 48 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 49 | ACPI_MODULE_NAME("processor_perflib"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 51 | static DEFINE_MUTEX(performance_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | /* |
| 54 | * _PPC support is implemented as a CPUfreq policy notifier: |
| 55 | * This means each time a CPUfreq driver registered also with |
| 56 | * the ACPI core is asked to change the speed policy, the maximum |
| 57 | * value is adjusted so that it is within the platform limit. |
| 58 | * |
| 59 | * Also, when a new platform limit value is detected, the CPUfreq |
| 60 | * policy is adjusted accordingly. |
| 61 | */ |
| 62 | |
Thomas Renninger | 623b78c | 2007-05-18 21:59:28 -0500 | [diff] [blame^] | 63 | static unsigned int ignore_ppc = 0; |
| 64 | module_param(ignore_ppc, uint, 0644); |
| 65 | MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \ |
| 66 | "limited by BIOS, this should help"); |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #define PPC_REGISTERED 1 |
| 69 | #define PPC_IN_USE 2 |
| 70 | |
| 71 | static int acpi_processor_ppc_status = 0; |
| 72 | |
| 73 | static int acpi_processor_ppc_notifier(struct notifier_block *nb, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 74 | unsigned long event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
| 76 | struct cpufreq_policy *policy = data; |
| 77 | struct acpi_processor *pr; |
| 78 | unsigned int ppc = 0; |
| 79 | |
Thomas Renninger | 623b78c | 2007-05-18 21:59:28 -0500 | [diff] [blame^] | 80 | if (ignore_ppc) |
| 81 | return 0; |
| 82 | |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 83 | mutex_lock(&performance_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
| 85 | if (event != CPUFREQ_INCOMPATIBLE) |
| 86 | goto out; |
| 87 | |
| 88 | pr = processors[policy->cpu]; |
| 89 | if (!pr || !pr->performance) |
| 90 | goto out; |
| 91 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | ppc = (unsigned int)pr->performance_platform_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Dave Jones | 0916bd3 | 2006-11-22 20:42:01 -0500 | [diff] [blame] | 94 | if (ppc >= pr->performance->state_count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | goto out; |
| 96 | |
| 97 | cpufreq_verify_within_limits(policy, 0, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 98 | pr->performance->states[ppc]. |
| 99 | core_frequency * 1000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 101 | out: |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 102 | mutex_unlock(&performance_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | static struct notifier_block acpi_ppc_notifier_block = { |
| 108 | .notifier_call = acpi_processor_ppc_notifier, |
| 109 | }; |
| 110 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 111 | static int acpi_processor_get_platform_limit(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 113 | acpi_status status = 0; |
| 114 | unsigned long ppc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
| 117 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 118 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | /* |
| 121 | * _PPC indicates the maximum state currently supported by the platform |
| 122 | * (e.g. 0 = states 0..n; 1 = states 1..n; etc. |
| 123 | */ |
| 124 | status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc); |
| 125 | |
| 126 | if (status != AE_NOT_FOUND) |
| 127 | acpi_processor_ppc_status |= PPC_IN_USE; |
| 128 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 129 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 130 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PPC")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 131 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 134 | pr->performance_platform_limit = (int)ppc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 136 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } |
| 138 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | { |
Thomas Renninger | 623b78c | 2007-05-18 21:59:28 -0500 | [diff] [blame^] | 141 | int ret; |
| 142 | |
| 143 | if (ignore_ppc) |
| 144 | return 0; |
| 145 | |
| 146 | ret = acpi_processor_get_platform_limit(pr); |
| 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | if (ret < 0) |
| 149 | return (ret); |
| 150 | else |
| 151 | return cpufreq_update_policy(pr->id); |
| 152 | } |
| 153 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 154 | void acpi_processor_ppc_init(void) |
| 155 | { |
| 156 | if (!cpufreq_register_notifier |
| 157 | (&acpi_ppc_notifier_block, CPUFREQ_POLICY_NOTIFIER)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | acpi_processor_ppc_status |= PPC_REGISTERED; |
| 159 | else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 160 | printk(KERN_DEBUG |
| 161 | "Warning: Processor Platform Limit not supported.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | } |
| 163 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | void acpi_processor_ppc_exit(void) |
| 165 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | if (acpi_processor_ppc_status & PPC_REGISTERED) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 167 | cpufreq_unregister_notifier(&acpi_ppc_notifier_block, |
| 168 | CPUFREQ_POLICY_NOTIFIER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | acpi_processor_ppc_status &= ~PPC_REGISTERED; |
| 171 | } |
| 172 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | static int acpi_processor_get_performance_control(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 175 | int result = 0; |
| 176 | acpi_status status = 0; |
| 177 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 178 | union acpi_object *pct = NULL; |
| 179 | union acpi_object obj = { 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
| 182 | status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 183 | if (ACPI_FAILURE(status)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 184 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PCT")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 185 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 188 | pct = (union acpi_object *)buffer.pointer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | if (!pct || (pct->type != ACPI_TYPE_PACKAGE) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 190 | || (pct->package.count != 2)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 191 | printk(KERN_ERR PREFIX "Invalid _PCT data\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | result = -EFAULT; |
| 193 | goto end; |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * control_register |
| 198 | */ |
| 199 | |
| 200 | obj = pct->package.elements[0]; |
| 201 | |
| 202 | if ((obj.type != ACPI_TYPE_BUFFER) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 203 | || (obj.buffer.length < sizeof(struct acpi_pct_register)) |
| 204 | || (obj.buffer.pointer == NULL)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 205 | printk(KERN_ERR PREFIX "Invalid _PCT data (control_register)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | result = -EFAULT; |
| 207 | goto end; |
| 208 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 209 | memcpy(&pr->performance->control_register, obj.buffer.pointer, |
| 210 | sizeof(struct acpi_pct_register)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | /* |
| 213 | * status_register |
| 214 | */ |
| 215 | |
| 216 | obj = pct->package.elements[1]; |
| 217 | |
| 218 | if ((obj.type != ACPI_TYPE_BUFFER) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 219 | || (obj.buffer.length < sizeof(struct acpi_pct_register)) |
| 220 | || (obj.buffer.pointer == NULL)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 221 | printk(KERN_ERR PREFIX "Invalid _PCT data (status_register)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | result = -EFAULT; |
| 223 | goto end; |
| 224 | } |
| 225 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 226 | memcpy(&pr->performance->status_register, obj.buffer.pointer, |
| 227 | sizeof(struct acpi_pct_register)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 229 | end: |
Len Brown | 02438d8 | 2006-06-30 03:19:10 -0400 | [diff] [blame] | 230 | kfree(buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 232 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 235 | static int acpi_processor_get_performance_states(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | int result = 0; |
| 238 | acpi_status status = AE_OK; |
| 239 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 240 | struct acpi_buffer format = { sizeof("NNNNNN"), "NNNNNN" }; |
| 241 | struct acpi_buffer state = { 0, NULL }; |
| 242 | union acpi_object *pss = NULL; |
| 243 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 247 | if (ACPI_FAILURE(status)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 248 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PSS")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 249 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
| 251 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 252 | pss = buffer.pointer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | if (!pss || (pss->type != ACPI_TYPE_PACKAGE)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 254 | printk(KERN_ERR PREFIX "Invalid _PSS data\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | result = -EFAULT; |
| 256 | goto end; |
| 257 | } |
| 258 | |
| 259 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d performance states\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 260 | pss->package.count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | pr->performance->state_count = pss->package.count; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 263 | pr->performance->states = |
| 264 | kmalloc(sizeof(struct acpi_processor_px) * pss->package.count, |
| 265 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | if (!pr->performance->states) { |
| 267 | result = -ENOMEM; |
| 268 | goto end; |
| 269 | } |
| 270 | |
| 271 | for (i = 0; i < pr->performance->state_count; i++) { |
| 272 | |
| 273 | struct acpi_processor_px *px = &(pr->performance->states[i]); |
| 274 | |
| 275 | state.length = sizeof(struct acpi_processor_px); |
| 276 | state.pointer = px; |
| 277 | |
| 278 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i)); |
| 279 | |
| 280 | status = acpi_extract_package(&(pss->package.elements[i]), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 281 | &format, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | if (ACPI_FAILURE(status)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 283 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _PSS data")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | result = -EFAULT; |
| 285 | kfree(pr->performance->states); |
| 286 | goto end; |
| 287 | } |
| 288 | |
| 289 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 290 | "State [%d]: core_frequency[%d] power[%d] transition_latency[%d] bus_master_latency[%d] control[0x%x] status[0x%x]\n", |
| 291 | i, |
| 292 | (u32) px->core_frequency, |
| 293 | (u32) px->power, |
| 294 | (u32) px->transition_latency, |
| 295 | (u32) px->bus_master_latency, |
| 296 | (u32) px->control, (u32) px->status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
| 298 | if (!px->core_frequency) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 299 | printk(KERN_ERR PREFIX |
| 300 | "Invalid _PSS data: freq is zero\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | result = -EFAULT; |
| 302 | kfree(pr->performance->states); |
| 303 | goto end; |
| 304 | } |
| 305 | } |
| 306 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 307 | end: |
Len Brown | 02438d8 | 2006-06-30 03:19:10 -0400 | [diff] [blame] | 308 | kfree(buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 310 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
| 312 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 313 | static int acpi_processor_get_performance_info(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 315 | int result = 0; |
| 316 | acpi_status status = AE_OK; |
| 317 | acpi_handle handle = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
| 320 | if (!pr || !pr->performance || !pr->handle) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 321 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | status = acpi_get_handle(pr->handle, "_PCT", &handle); |
| 324 | if (ACPI_FAILURE(status)) { |
| 325 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 326 | "ACPI-based processor performance control unavailable\n")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 327 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | result = acpi_processor_get_performance_control(pr); |
| 331 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 332 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | result = acpi_processor_get_performance_states(pr); |
| 335 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 336 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 338 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 341 | int acpi_processor_notify_smm(struct module *calling_module) |
| 342 | { |
| 343 | acpi_status status; |
| 344 | static int is_done = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
| 347 | if (!(acpi_processor_ppc_status & PPC_REGISTERED)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 348 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
| 350 | if (!try_module_get(calling_module)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 351 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
| 353 | /* is_done is set to negative if an error occured, |
| 354 | * and to postitive if _no_ error occured, but SMM |
| 355 | * was already notified. This avoids double notification |
| 356 | * which might lead to unexpected results... |
| 357 | */ |
| 358 | if (is_done > 0) { |
| 359 | module_put(calling_module); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 360 | return 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 361 | } else if (is_done < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | module_put(calling_module); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 363 | return is_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | is_done = -EIO; |
| 367 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 368 | /* Can't write pstate_control to smi_command if either value is zero */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 369 | if ((!acpi_gbl_FADT.smi_command) || (!acpi_gbl_FADT.pstate_control)) { |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 370 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No SMI port or pstate_control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | module_put(calling_module); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 372 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | } |
| 374 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 375 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 376 | "Writing pstate_control [0x%x] to smi_command [0x%x]\n", |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 377 | acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 379 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
| 380 | (u32) acpi_gbl_FADT.pstate_control, 8); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 381 | if (ACPI_FAILURE(status)) { |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 382 | ACPI_EXCEPTION((AE_INFO, status, |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 383 | "Failed to write pstate_control [0x%x] to " |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 384 | "smi_command [0x%x]", acpi_gbl_FADT.pstate_control, |
| 385 | acpi_gbl_FADT.smi_command)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | module_put(calling_module); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 387 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | /* Success. If there's no _PPC, we need to fear nothing, so |
| 391 | * we can allow the cpufreq driver to be rmmod'ed. */ |
| 392 | is_done = 1; |
| 393 | |
| 394 | if (!(acpi_processor_ppc_status & PPC_IN_USE)) |
| 395 | module_put(calling_module); |
| 396 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 397 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 400 | EXPORT_SYMBOL(acpi_processor_notify_smm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
| 402 | #ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF |
| 403 | /* /proc/acpi/processor/../performance interface (DEPRECATED) */ |
| 404 | |
| 405 | static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file); |
| 406 | static struct file_operations acpi_processor_perf_fops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 407 | .open = acpi_processor_perf_open_fs, |
| 408 | .read = seq_read, |
| 409 | .llseek = seq_lseek, |
| 410 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | }; |
| 412 | |
| 413 | static int acpi_processor_perf_seq_show(struct seq_file *seq, void *offset) |
| 414 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 415 | struct acpi_processor *pr = seq->private; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 416 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
| 419 | if (!pr) |
| 420 | goto end; |
| 421 | |
| 422 | if (!pr->performance) { |
| 423 | seq_puts(seq, "<not supported>\n"); |
| 424 | goto end; |
| 425 | } |
| 426 | |
| 427 | seq_printf(seq, "state count: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 428 | "active state: P%d\n", |
| 429 | pr->performance->state_count, pr->performance->state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
| 431 | seq_puts(seq, "states:\n"); |
| 432 | for (i = 0; i < pr->performance->state_count; i++) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 433 | seq_printf(seq, |
| 434 | " %cP%d: %d MHz, %d mW, %d uS\n", |
| 435 | (i == pr->performance->state ? '*' : ' '), i, |
| 436 | (u32) pr->performance->states[i].core_frequency, |
| 437 | (u32) pr->performance->states[i].power, |
| 438 | (u32) pr->performance->states[i].transition_latency); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 440 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 441 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file) |
| 445 | { |
| 446 | return single_open(file, acpi_processor_perf_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 447 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 450 | static void acpi_cpufreq_add_file(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 452 | struct proc_dir_entry *entry = NULL; |
| 453 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
| 456 | if (acpi_bus_get_device(pr->handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 457 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
| 459 | /* add file 'performance' [R/W] */ |
| 460 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE, |
Thomas Renninger | 632786c | 2007-04-19 15:49:09 +0200 | [diff] [blame] | 461 | S_IFREG | S_IRUGO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 462 | acpi_device_dir(device)); |
Thomas Renninger | a6fc672 | 2006-06-26 23:58:43 -0400 | [diff] [blame] | 463 | if (entry){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | entry->proc_fops = &acpi_processor_perf_fops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | entry->data = acpi_driver_data(device); |
| 466 | entry->owner = THIS_MODULE; |
| 467 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 468 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 471 | static void acpi_cpufreq_remove_file(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 473 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
| 476 | if (acpi_bus_get_device(pr->handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 477 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | /* remove file 'performance' */ |
| 480 | remove_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 481 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 483 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 487 | static void acpi_cpufreq_add_file(struct acpi_processor *pr) |
| 488 | { |
| 489 | return; |
| 490 | } |
| 491 | static void acpi_cpufreq_remove_file(struct acpi_processor *pr) |
| 492 | { |
| 493 | return; |
| 494 | } |
| 495 | #endif /* CONFIG_X86_ACPI_CPUFREQ_PROC_INTF */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 497 | static int acpi_processor_get_psd(struct acpi_processor *pr) |
| 498 | { |
| 499 | int result = 0; |
| 500 | acpi_status status = AE_OK; |
| 501 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 502 | struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"}; |
| 503 | struct acpi_buffer state = {0, NULL}; |
| 504 | union acpi_object *psd = NULL; |
| 505 | struct acpi_psd_package *pdomain; |
| 506 | |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 507 | status = acpi_evaluate_object(pr->handle, "_PSD", NULL, &buffer); |
| 508 | if (ACPI_FAILURE(status)) { |
Len Brown | 9011bff4 | 2006-05-11 00:28:12 -0400 | [diff] [blame] | 509 | return -ENODEV; |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 510 | } |
| 511 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 512 | psd = buffer.pointer; |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 513 | if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) { |
| 514 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n")); |
| 515 | result = -EFAULT; |
| 516 | goto end; |
| 517 | } |
| 518 | |
| 519 | if (psd->package.count != 1) { |
| 520 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n")); |
| 521 | result = -EFAULT; |
| 522 | goto end; |
| 523 | } |
| 524 | |
| 525 | pdomain = &(pr->performance->domain_info); |
| 526 | |
| 527 | state.length = sizeof(struct acpi_psd_package); |
| 528 | state.pointer = pdomain; |
| 529 | |
| 530 | status = acpi_extract_package(&(psd->package.elements[0]), |
| 531 | &format, &state); |
| 532 | if (ACPI_FAILURE(status)) { |
| 533 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n")); |
| 534 | result = -EFAULT; |
| 535 | goto end; |
| 536 | } |
| 537 | |
| 538 | if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) { |
| 539 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:num_entries\n")); |
| 540 | result = -EFAULT; |
| 541 | goto end; |
| 542 | } |
| 543 | |
| 544 | if (pdomain->revision != ACPI_PSD_REV0_REVISION) { |
| 545 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:revision\n")); |
| 546 | result = -EFAULT; |
| 547 | goto end; |
| 548 | } |
| 549 | |
| 550 | end: |
Len Brown | 02438d8 | 2006-06-30 03:19:10 -0400 | [diff] [blame] | 551 | kfree(buffer.pointer); |
Len Brown | 9011bff4 | 2006-05-11 00:28:12 -0400 | [diff] [blame] | 552 | return result; |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 553 | } |
| 554 | |
| 555 | int acpi_processor_preregister_performance( |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 556 | struct acpi_processor_performance *performance) |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 557 | { |
| 558 | int count, count_target; |
| 559 | int retval = 0; |
| 560 | unsigned int i, j; |
| 561 | cpumask_t covered_cpus; |
| 562 | struct acpi_processor *pr; |
| 563 | struct acpi_psd_package *pdomain; |
| 564 | struct acpi_processor *match_pr; |
| 565 | struct acpi_psd_package *match_pdomain; |
| 566 | |
Len Brown | 785fccc | 2006-06-15 22:19:31 -0400 | [diff] [blame] | 567 | mutex_lock(&performance_mutex); |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 568 | |
| 569 | retval = 0; |
| 570 | |
| 571 | /* Call _PSD for all CPUs */ |
KAMEZAWA Hiroyuki | 193de0c | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 572 | for_each_possible_cpu(i) { |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 573 | pr = processors[i]; |
| 574 | if (!pr) { |
| 575 | /* Look only at processors in ACPI namespace */ |
| 576 | continue; |
| 577 | } |
| 578 | |
| 579 | if (pr->performance) { |
| 580 | retval = -EBUSY; |
| 581 | continue; |
| 582 | } |
| 583 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 584 | if (!performance || !percpu_ptr(performance, i)) { |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 585 | retval = -EINVAL; |
| 586 | continue; |
| 587 | } |
| 588 | |
Fenghua Yu | 5010929 | 2007-08-07 18:40:30 -0400 | [diff] [blame] | 589 | pr->performance = percpu_ptr(performance, i); |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 590 | cpu_set(i, pr->performance->shared_cpu_map); |
| 591 | if (acpi_processor_get_psd(pr)) { |
| 592 | retval = -EINVAL; |
| 593 | continue; |
| 594 | } |
| 595 | } |
| 596 | if (retval) |
| 597 | goto err_ret; |
| 598 | |
| 599 | /* |
| 600 | * Now that we have _PSD data from all CPUs, lets setup P-state |
| 601 | * domain info. |
| 602 | */ |
KAMEZAWA Hiroyuki | 193de0c | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 603 | for_each_possible_cpu(i) { |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 604 | pr = processors[i]; |
| 605 | if (!pr) |
| 606 | continue; |
| 607 | |
| 608 | /* Basic validity check for domain info */ |
| 609 | pdomain = &(pr->performance->domain_info); |
| 610 | if ((pdomain->revision != ACPI_PSD_REV0_REVISION) || |
| 611 | (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES)) { |
| 612 | retval = -EINVAL; |
| 613 | goto err_ret; |
| 614 | } |
| 615 | if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL && |
| 616 | pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY && |
| 617 | pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) { |
| 618 | retval = -EINVAL; |
| 619 | goto err_ret; |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | cpus_clear(covered_cpus); |
KAMEZAWA Hiroyuki | 193de0c | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 624 | for_each_possible_cpu(i) { |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 625 | pr = processors[i]; |
| 626 | if (!pr) |
| 627 | continue; |
| 628 | |
| 629 | if (cpu_isset(i, covered_cpus)) |
| 630 | continue; |
| 631 | |
| 632 | pdomain = &(pr->performance->domain_info); |
| 633 | cpu_set(i, pr->performance->shared_cpu_map); |
| 634 | cpu_set(i, covered_cpus); |
| 635 | if (pdomain->num_processors <= 1) |
| 636 | continue; |
| 637 | |
| 638 | /* Validate the Domain info */ |
| 639 | count_target = pdomain->num_processors; |
| 640 | count = 1; |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 641 | if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL) |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 642 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL; |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 643 | else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL) |
| 644 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_HW; |
| 645 | else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY) |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 646 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY; |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 647 | |
KAMEZAWA Hiroyuki | 193de0c | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 648 | for_each_possible_cpu(j) { |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 649 | if (i == j) |
| 650 | continue; |
| 651 | |
| 652 | match_pr = processors[j]; |
| 653 | if (!match_pr) |
| 654 | continue; |
| 655 | |
| 656 | match_pdomain = &(match_pr->performance->domain_info); |
| 657 | if (match_pdomain->domain != pdomain->domain) |
| 658 | continue; |
| 659 | |
| 660 | /* Here i and j are in the same domain */ |
| 661 | |
| 662 | if (match_pdomain->num_processors != count_target) { |
| 663 | retval = -EINVAL; |
| 664 | goto err_ret; |
| 665 | } |
| 666 | |
| 667 | if (pdomain->coord_type != match_pdomain->coord_type) { |
| 668 | retval = -EINVAL; |
| 669 | goto err_ret; |
| 670 | } |
| 671 | |
| 672 | cpu_set(j, covered_cpus); |
| 673 | cpu_set(j, pr->performance->shared_cpu_map); |
| 674 | count++; |
| 675 | } |
| 676 | |
KAMEZAWA Hiroyuki | 193de0c | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 677 | for_each_possible_cpu(j) { |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 678 | if (i == j) |
| 679 | continue; |
| 680 | |
| 681 | match_pr = processors[j]; |
| 682 | if (!match_pr) |
| 683 | continue; |
| 684 | |
| 685 | match_pdomain = &(match_pr->performance->domain_info); |
| 686 | if (match_pdomain->domain != pdomain->domain) |
| 687 | continue; |
| 688 | |
| 689 | match_pr->performance->shared_type = |
| 690 | pr->performance->shared_type; |
| 691 | match_pr->performance->shared_cpu_map = |
| 692 | pr->performance->shared_cpu_map; |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | err_ret: |
KAMEZAWA Hiroyuki | 193de0c | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 697 | for_each_possible_cpu(i) { |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 698 | pr = processors[i]; |
| 699 | if (!pr || !pr->performance) |
| 700 | continue; |
| 701 | |
| 702 | /* Assume no coordination on any error parsing domain info */ |
| 703 | if (retval) { |
| 704 | cpus_clear(pr->performance->shared_cpu_map); |
| 705 | cpu_set(i, pr->performance->shared_cpu_map); |
| 706 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL; |
| 707 | } |
| 708 | pr->performance = NULL; /* Will be set for real in register */ |
| 709 | } |
| 710 | |
Len Brown | 785fccc | 2006-06-15 22:19:31 -0400 | [diff] [blame] | 711 | mutex_unlock(&performance_mutex); |
Len Brown | 9011bff4 | 2006-05-11 00:28:12 -0400 | [diff] [blame] | 712 | return retval; |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 713 | } |
| 714 | EXPORT_SYMBOL(acpi_processor_preregister_performance); |
| 715 | |
| 716 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 718 | acpi_processor_register_performance(struct acpi_processor_performance |
| 719 | *performance, unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | { |
| 721 | struct acpi_processor *pr; |
| 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | if (!(acpi_processor_ppc_status & PPC_REGISTERED)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 725 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 727 | mutex_lock(&performance_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | pr = processors[cpu]; |
| 730 | if (!pr) { |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 731 | mutex_unlock(&performance_mutex); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 732 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | if (pr->performance) { |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 736 | mutex_unlock(&performance_mutex); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 737 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
| 739 | |
Andrew Morton | a913f50 | 2006-06-10 09:54:13 -0700 | [diff] [blame] | 740 | WARN_ON(!performance); |
| 741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | pr->performance = performance; |
| 743 | |
| 744 | if (acpi_processor_get_performance_info(pr)) { |
| 745 | pr->performance = NULL; |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 746 | mutex_unlock(&performance_mutex); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 747 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | } |
| 749 | |
| 750 | acpi_cpufreq_add_file(pr); |
| 751 | |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 752 | mutex_unlock(&performance_mutex); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 753 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 755 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | EXPORT_SYMBOL(acpi_processor_register_performance); |
| 757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 759 | acpi_processor_unregister_performance(struct acpi_processor_performance |
| 760 | *performance, unsigned int cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | { |
| 762 | struct acpi_processor *pr; |
| 763 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 765 | mutex_lock(&performance_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
| 767 | pr = processors[cpu]; |
| 768 | if (!pr) { |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 769 | mutex_unlock(&performance_mutex); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 770 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | } |
| 772 | |
Andrew Morton | a913f50 | 2006-06-10 09:54:13 -0700 | [diff] [blame] | 773 | if (pr->performance) |
| 774 | kfree(pr->performance->states); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | pr->performance = NULL; |
| 776 | |
| 777 | acpi_cpufreq_remove_file(pr); |
| 778 | |
Arjan van de Ven | 65c19bb | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 779 | mutex_unlock(&performance_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 781 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 783 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | EXPORT_SYMBOL(acpi_processor_unregister_performance); |