Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_processor.c - ACPI Processor Driver ($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 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or (at |
| 15 | * your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, but |
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 25 | * |
| 26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 27 | * TBD: |
| 28 | * 1. Make # power states dynamic. |
| 29 | * 2. Support duty_cycle values that span bit 4. |
| 30 | * 3. Optimize by having scheduler determine business instead of |
| 31 | * having us try to calculate it here. |
| 32 | * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/kernel.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/types.h> |
| 39 | #include <linux/pci.h> |
| 40 | #include <linux/pm.h> |
| 41 | #include <linux/cpufreq.h> |
| 42 | #include <linux/cpu.h> |
| 43 | #include <linux/proc_fs.h> |
| 44 | #include <linux/seq_file.h> |
| 45 | #include <linux/dmi.h> |
| 46 | #include <linux/moduleparam.h> |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 47 | #include <linux/cpuidle.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | #include <asm/io.h> |
| 50 | #include <asm/system.h> |
| 51 | #include <asm/cpu.h> |
| 52 | #include <asm/delay.h> |
| 53 | #include <asm/uaccess.h> |
| 54 | #include <asm/processor.h> |
| 55 | #include <asm/smp.h> |
| 56 | #include <asm/acpi.h> |
| 57 | |
| 58 | #include <acpi/acpi_bus.h> |
| 59 | #include <acpi/acpi_drivers.h> |
| 60 | #include <acpi/processor.h> |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
| 63 | #define ACPI_PROCESSOR_CLASS "processor" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
| 65 | #define ACPI_PROCESSOR_FILE_INFO "info" |
| 66 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" |
| 67 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" |
| 68 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 |
| 69 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 70 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | #define ACPI_PROCESSOR_LIMIT_USER 0 |
| 73 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 76 | ACPI_MODULE_NAME("processor_core"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 78 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 79 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | MODULE_LICENSE("GPL"); |
| 81 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 82 | static int acpi_processor_add(struct acpi_device *device); |
| 83 | static int acpi_processor_start(struct acpi_device *device); |
| 84 | static int acpi_processor_remove(struct acpi_device *device, int type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
| 88 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 91 | static const struct acpi_device_id processor_device_ids[] = { |
| 92 | {ACPI_PROCESSOR_HID, 0}, |
| 93 | {"", 0}, |
| 94 | }; |
| 95 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | static struct acpi_driver acpi_processor_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 98 | .name = "processor", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 99 | .class = ACPI_PROCESSOR_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 100 | .ids = processor_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 101 | .ops = { |
| 102 | .add = acpi_processor_add, |
| 103 | .remove = acpi_processor_remove, |
| 104 | .start = acpi_processor_start, |
Thomas Gleixner | b04e7bd | 2007-09-22 22:29:05 +0000 | [diff] [blame] | 105 | .suspend = acpi_processor_suspend, |
| 106 | .resume = acpi_processor_resume, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 107 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | }; |
| 109 | |
| 110 | #define INSTALL_NOTIFY_HANDLER 1 |
| 111 | #define UNINSTALL_NOTIFY_HANDLER 2 |
| 112 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 113 | static const struct file_operations acpi_processor_info_fops = { |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 114 | .owner = THIS_MODULE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 115 | .open = acpi_processor_info_open_fs, |
| 116 | .read = seq_read, |
| 117 | .llseek = seq_lseek, |
| 118 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | }; |
| 120 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 121 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
Andreas Mohr | 9f22271 | 2006-06-23 02:04:27 -0700 | [diff] [blame] | 122 | struct acpi_processor_errata errata __read_mostly; |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 123 | static int set_no_mwait(const struct dmi_system_id *id) |
| 124 | { |
| 125 | printk(KERN_NOTICE PREFIX "%s detected - " |
| 126 | "disable mwait for CPU C-stetes\n", id->ident); |
| 127 | idle_nomwait = 1; |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { |
| 132 | { |
| 133 | set_no_mwait, "IFL91 board", { |
| 134 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), |
| 135 | DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), |
| 136 | DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), |
| 137 | DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, |
| 138 | { |
| 139 | set_no_mwait, "Extensa 5220", { |
| 140 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), |
| 141 | DMI_MATCH(DMI_SYS_VENDOR, "ACER"), |
| 142 | DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), |
| 143 | DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, |
| 144 | {}, |
| 145 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | /* -------------------------------------------------------------------------- |
| 148 | Errata Handling |
| 149 | -------------------------------------------------------------------------- */ |
| 150 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 151 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 153 | u8 value1 = 0; |
| 154 | u8 value2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
| 157 | if (!dev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 158 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | /* |
| 161 | * Note that 'dev' references the PIIX4 ACPI Controller. |
| 162 | */ |
| 163 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 164 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | case 0: |
| 166 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); |
| 167 | break; |
| 168 | case 1: |
| 169 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); |
| 170 | break; |
| 171 | case 2: |
| 172 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); |
| 173 | break; |
| 174 | case 3: |
| 175 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); |
| 176 | break; |
| 177 | default: |
| 178 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); |
| 179 | break; |
| 180 | } |
| 181 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 182 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
| 184 | case 0: /* PIIX4 A-step */ |
| 185 | case 1: /* PIIX4 B-step */ |
| 186 | /* |
| 187 | * See specification changes #13 ("Manual Throttle Duty Cycle") |
| 188 | * and #14 ("Enabling and Disabling Manual Throttle"), plus |
| 189 | * erratum #5 ("STPCLK# Deassertion Time") from the January |
| 190 | * 2002 PIIX4 specification update. Applies to only older |
| 191 | * PIIX4 models. |
| 192 | */ |
| 193 | errata.piix4.throttle = 1; |
| 194 | |
| 195 | case 2: /* PIIX4E */ |
| 196 | case 3: /* PIIX4M */ |
| 197 | /* |
| 198 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA |
| 199 | * Livelock") from the January 2002 PIIX4 specification update. |
| 200 | * Applies to all PIIX4 models. |
| 201 | */ |
| 202 | |
| 203 | /* |
| 204 | * BM-IDE |
| 205 | * ------ |
| 206 | * Find the PIIX4 IDE Controller and get the Bus Master IDE |
| 207 | * Status register address. We'll use this later to read |
| 208 | * each IDE controller's DMA status to make sure we catch all |
| 209 | * DMA activity. |
| 210 | */ |
| 211 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 212 | PCI_DEVICE_ID_INTEL_82371AB, |
| 213 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | if (dev) { |
| 215 | errata.piix4.bmisx = pci_resource_start(dev, 4); |
| 216 | pci_dev_put(dev); |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | * Type-F DMA |
| 221 | * ---------- |
| 222 | * Find the PIIX4 ISA Controller and read the Motherboard |
| 223 | * DMA controller's status to see if Type-F (Fast) DMA mode |
| 224 | * is enabled (bit 7) on either channel. Note that we'll |
| 225 | * disable C3 support if this is enabled, as some legacy |
| 226 | * devices won't operate well if fast DMA is disabled. |
| 227 | */ |
| 228 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 229 | PCI_DEVICE_ID_INTEL_82371AB_0, |
| 230 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | if (dev) { |
| 232 | pci_read_config_byte(dev, 0x76, &value1); |
| 233 | pci_read_config_byte(dev, 0x77, &value2); |
| 234 | if ((value1 & 0x80) || (value2 & 0x80)) |
| 235 | errata.piix4.fdma = 1; |
| 236 | pci_dev_put(dev); |
| 237 | } |
| 238 | |
| 239 | break; |
| 240 | } |
| 241 | |
| 242 | if (errata.piix4.bmisx) |
| 243 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | if (errata.piix4.fdma) |
| 246 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 247 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 249 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
| 251 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 252 | static int acpi_processor_errata(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 254 | int result = 0; |
| 255 | struct pci_dev *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 259 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | /* |
| 262 | * PIIX4 |
| 263 | */ |
| 264 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 265 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
| 266 | PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | if (dev) { |
| 268 | result = acpi_processor_errata_piix4(dev); |
| 269 | pci_dev_put(dev); |
| 270 | } |
| 271 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 272 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | } |
| 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | /* -------------------------------------------------------------------------- |
Akinobu Mita | 0b28002 | 2006-03-26 01:38:58 -0800 | [diff] [blame] | 276 | Common ACPI processor functions |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 277 | -------------------------------------------------------------------------- */ |
| 278 | |
| 279 | /* |
| 280 | * _PDC is required for a BIOS-OS handshake for most of the newer |
| 281 | * ACPI processor features. |
| 282 | */ |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 283 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 284 | { |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 285 | struct acpi_object_list *pdc_in = pr->pdc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 286 | acpi_status status = AE_OK; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 287 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 288 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 289 | if (!pdc_in) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 290 | return status; |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 291 | if (idle_nomwait) { |
| 292 | /* |
| 293 | * If mwait is disabled for CPU C-states, the C2C3_FFH access |
| 294 | * mode will be disabled in the parameter of _PDC object. |
| 295 | * Of course C1_FFH access mode will also be disabled. |
| 296 | */ |
| 297 | union acpi_object *obj; |
| 298 | u32 *buffer = NULL; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 299 | |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 300 | obj = pdc_in->pointer; |
| 301 | buffer = (u32 *)(obj->buffer.pointer); |
| 302 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); |
| 303 | |
| 304 | } |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 305 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 306 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 307 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 308 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 309 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 310 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 311 | return status; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 312 | } |
| 313 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 314 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | FS Interface (/proc) |
| 316 | -------------------------------------------------------------------------- */ |
| 317 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 318 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
| 320 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) |
| 321 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 322 | struct acpi_processor *pr = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
| 325 | if (!pr) |
| 326 | goto end; |
| 327 | |
| 328 | seq_printf(seq, "processor id: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 329 | "acpi id: %d\n" |
| 330 | "bus mastering control: %s\n" |
| 331 | "power management: %s\n" |
| 332 | "throttling control: %s\n" |
| 333 | "limit interface: %s\n", |
| 334 | pr->id, |
| 335 | pr->acpi_id, |
| 336 | pr->flags.bm_control ? "yes" : "no", |
| 337 | pr->flags.power ? "yes" : "no", |
| 338 | pr->flags.throttling ? "yes" : "no", |
| 339 | pr->flags.limit ? "yes" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 341 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 342 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) |
| 346 | { |
| 347 | return single_open(file, acpi_processor_info_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 348 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 351 | static int acpi_processor_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 353 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | if (!acpi_device_dir(device)) { |
| 357 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 358 | acpi_processor_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 360 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | } |
| 362 | acpi_device_dir(device)->owner = THIS_MODULE; |
| 363 | |
| 364 | /* 'info' [R] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 365 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
| 366 | S_IRUGO, acpi_device_dir(device), |
| 367 | &acpi_processor_info_fops, |
| 368 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 370 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | /* 'throttling' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 373 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
| 374 | S_IFREG | S_IRUGO | S_IWUSR, |
| 375 | acpi_device_dir(device), |
| 376 | &acpi_processor_throttling_fops, |
| 377 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 379 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | /* 'limit' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 382 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
| 383 | S_IFREG | S_IRUGO | S_IWUSR, |
| 384 | acpi_device_dir(device), |
| 385 | &acpi_processor_limit_fops, |
| 386 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 388 | return -EIO; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 389 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 392 | static int acpi_processor_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | |
| 395 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 396 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
| 397 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 399 | acpi_device_dir(device)); |
| 400 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
| 401 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
| 403 | acpi_device_dir(device) = NULL; |
| 404 | } |
| 405 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 406 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | /* Use the acpiid in MADT to map cpus in case of SMP */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | #ifndef CONFIG_SMP |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 412 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | #else |
| 414 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 415 | static struct acpi_table_madt *madt; |
| 416 | |
| 417 | static int map_lapic_id(struct acpi_subtable_header *entry, |
| 418 | u32 acpi_id, int *apic_id) |
| 419 | { |
| 420 | struct acpi_madt_local_apic *lapic = |
| 421 | (struct acpi_madt_local_apic *)entry; |
| 422 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && |
| 423 | lapic->processor_id == acpi_id) { |
| 424 | *apic_id = lapic->id; |
| 425 | return 1; |
| 426 | } |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
| 431 | u32 acpi_id, int *apic_id) |
| 432 | { |
| 433 | struct acpi_madt_local_sapic *lsapic = |
| 434 | (struct acpi_madt_local_sapic *)entry; |
| 435 | /* Only check enabled APICs*/ |
| 436 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { |
| 437 | /* First check against id */ |
| 438 | if (lsapic->processor_id == acpi_id) { |
Alexey Starikovskiy | 615d5f2 | 2007-02-12 10:51:23 -0500 | [diff] [blame] | 439 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 440 | return 1; |
| 441 | /* Check against optional uid */ |
| 442 | } else if (entry->length >= 16 && |
| 443 | lsapic->uid == acpi_id) { |
| 444 | *apic_id = lsapic->uid; |
| 445 | return 1; |
| 446 | } |
| 447 | } |
| 448 | return 0; |
| 449 | } |
| 450 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 451 | static int map_madt_entry(u32 acpi_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | { |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 453 | unsigned long madt_end, entry; |
| 454 | int apic_id = -1; |
| 455 | |
| 456 | if (!madt) |
| 457 | return apic_id; |
| 458 | |
| 459 | entry = (unsigned long)madt; |
| 460 | madt_end = entry + madt->header.length; |
| 461 | |
| 462 | /* Parse all entries looking for a match. */ |
| 463 | |
| 464 | entry += sizeof(struct acpi_table_madt); |
| 465 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { |
| 466 | struct acpi_subtable_header *header = |
| 467 | (struct acpi_subtable_header *)entry; |
| 468 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 469 | if (map_lapic_id(header, acpi_id, &apic_id)) |
| 470 | break; |
| 471 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
| 472 | if (map_lsapic_id(header, acpi_id, &apic_id)) |
| 473 | break; |
| 474 | } |
| 475 | entry += header->length; |
| 476 | } |
| 477 | return apic_id; |
| 478 | } |
| 479 | |
| 480 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) |
| 481 | { |
| 482 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 483 | union acpi_object *obj; |
| 484 | struct acpi_subtable_header *header; |
| 485 | int apic_id = -1; |
| 486 | |
| 487 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
| 488 | goto exit; |
| 489 | |
| 490 | if (!buffer.length || !buffer.pointer) |
| 491 | goto exit; |
| 492 | |
| 493 | obj = buffer.pointer; |
| 494 | if (obj->type != ACPI_TYPE_BUFFER || |
| 495 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { |
| 496 | goto exit; |
| 497 | } |
| 498 | |
| 499 | header = (struct acpi_subtable_header *)obj->buffer.pointer; |
| 500 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 501 | map_lapic_id(header, acpi_id, &apic_id); |
| 502 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
| 503 | map_lsapic_id(header, acpi_id, &apic_id); |
| 504 | } |
| 505 | |
| 506 | exit: |
| 507 | if (buffer.pointer) |
| 508 | kfree(buffer.pointer); |
| 509 | return apic_id; |
| 510 | } |
| 511 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 512 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 513 | { |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 514 | int i; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 515 | int apic_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 517 | apic_id = map_mat_entry(handle, acpi_id); |
| 518 | if (apic_id == -1) |
| 519 | apic_id = map_madt_entry(acpi_id); |
| 520 | if (apic_id == -1) |
| 521 | return apic_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 523 | for_each_possible_cpu(i) { |
Mike Travis | 71b3123 | 2007-10-19 20:35:03 +0200 | [diff] [blame] | 524 | if (cpu_physical_id(i) == apic_id) |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 525 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | } |
| 527 | return -1; |
| 528 | } |
| 529 | #endif |
| 530 | |
| 531 | /* -------------------------------------------------------------------------- |
| 532 | Driver Interface |
| 533 | -------------------------------------------------------------------------- */ |
| 534 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 535 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 537 | acpi_status status = 0; |
| 538 | union acpi_object object = { 0 }; |
| 539 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 540 | int cpu_index; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 541 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
| 544 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 545 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
| 547 | if (num_online_cpus() > 1) |
| 548 | errata.smp = TRUE; |
| 549 | |
| 550 | acpi_processor_errata(pr); |
| 551 | |
| 552 | /* |
| 553 | * Check to see if we have bus mastering arbitration control. This |
| 554 | * is required for proper C3 usage (to maintain cache coherency). |
| 555 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 556 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | pr->flags.bm_control = 1; |
| 558 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 559 | "Bus mastering arbitration control present\n")); |
| 560 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 562 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 564 | /* Check if it is a Device with HID and UID */ |
| 565 | if (has_uid) { |
| 566 | unsigned long value; |
| 567 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
| 568 | NULL, &value); |
| 569 | if (ACPI_FAILURE(status)) { |
| 570 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); |
| 571 | return -ENODEV; |
| 572 | } |
| 573 | pr->acpi_id = value; |
| 574 | } else { |
| 575 | /* |
| 576 | * Evalute the processor object. Note that it is common on SMP to |
| 577 | * have the first (boot) processor with a valid PBLK address while |
| 578 | * all others have a NULL address. |
| 579 | */ |
| 580 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 581 | if (ACPI_FAILURE(status)) { |
| 582 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); |
| 583 | return -ENODEV; |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
| 588 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c |
| 589 | */ |
| 590 | pr->acpi_id = object.processor.proc_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | } |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 592 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 594 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 595 | if (!cpu0_initialized && (cpu_index == -1) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 596 | (num_online_cpus() == 1)) { |
| 597 | cpu_index = 0; |
| 598 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 600 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 602 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 604 | /* |
| 605 | * Extra Processor objects may be enumerated on MP systems with |
| 606 | * less than the max # of CPUs. They should be ignored _iff |
| 607 | * they are physically not present. |
| 608 | */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 609 | if (pr->id == -1) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 610 | if (ACPI_FAILURE |
| 611 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 612 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 613 | } |
| 614 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
| 616 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 617 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | if (!object.processor.pblk_address) |
| 620 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 621 | else if (object.processor.pblk_length != 6) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 622 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
| 623 | object.processor.pblk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | else { |
| 625 | pr->throttling.address = object.processor.pblk_address; |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 626 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
| 627 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
| 629 | pr->pblk = object.processor.pblk_address; |
| 630 | |
| 631 | /* |
| 632 | * We don't care about error returns - we just try to mark |
| 633 | * these reserved so that nobody else is confused into thinking |
| 634 | * that this region might be unused.. |
| 635 | * |
| 636 | * (In particular, allocating the IO range for Cardbus) |
| 637 | */ |
| 638 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 639 | } |
| 640 | |
Alex Chiang | fe086a7 | 2008-04-29 15:05:29 -0700 | [diff] [blame] | 641 | /* |
| 642 | * If ACPI describes a slot number for this CPU, we can use it |
| 643 | * ensure we get the right value in the "physical id" field |
| 644 | * of /proc/cpuinfo |
| 645 | */ |
| 646 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); |
| 647 | if (ACPI_SUCCESS(status)) |
| 648 | arch_fix_phys_package_id(pr->id, object.integer.value); |
| 649 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 650 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | } |
| 652 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 653 | static DEFINE_PER_CPU(void *, processor_device_array); |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 654 | |
Pierre Ossman | 7af8b66 | 2006-10-10 14:20:31 -0700 | [diff] [blame] | 655 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 657 | int result = 0; |
| 658 | acpi_status status = AE_OK; |
| 659 | struct acpi_processor *pr; |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 660 | struct sys_device *sysdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
| 662 | pr = acpi_driver_data(device); |
| 663 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 664 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | if (result) { |
| 666 | /* Processor is physically not present */ |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 667 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
| 669 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 670 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 672 | /* |
| 673 | * Buggy BIOS check |
| 674 | * ACPI id of processors can be reported wrongly by the BIOS. |
| 675 | * Don't trust it blindly |
| 676 | */ |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 677 | if (per_cpu(processor_device_array, pr->id) != NULL && |
| 678 | per_cpu(processor_device_array, pr->id) != device) { |
Joe Perches | 4fdb2a0 | 2007-11-19 17:48:02 -0800 | [diff] [blame] | 679 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
Len Brown | 0eacee5 | 2006-03-31 00:37:23 -0500 | [diff] [blame] | 680 | "for the processor\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 681 | return -ENODEV; |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 682 | } |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 683 | per_cpu(processor_device_array, pr->id) = device; |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 684 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 685 | per_cpu(processors, pr->id) = pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
| 687 | result = acpi_processor_add_fs(device); |
| 688 | if (result) |
| 689 | goto end; |
| 690 | |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 691 | sysdev = get_cpu_sysdev(pr->id); |
| 692 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) |
| 693 | return -EFAULT; |
| 694 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 696 | acpi_processor_notify, pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 698 | /* _PDC call should be done before doing anything else (if reqd.). */ |
| 699 | arch_acpi_processor_init_pdc(pr); |
| 700 | acpi_processor_set_pdc(pr); |
Zhao Yakui | 0ac3c57 | 2007-11-15 17:05:46 +0800 | [diff] [blame] | 701 | #ifdef CONFIG_CPU_FREQ |
| 702 | acpi_processor_ppc_has_changed(pr); |
| 703 | #endif |
| 704 | acpi_processor_get_throttling_info(pr); |
| 705 | acpi_processor_get_limit_info(pr); |
| 706 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | acpi_processor_power_init(pr, device); |
| 709 | |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 710 | pr->cdev = thermal_cooling_device_register("Processor", device, |
| 711 | &processor_cooling_ops); |
Thomas Sujith | d76628c | 2008-02-15 18:26:54 -0500 | [diff] [blame] | 712 | if (IS_ERR(pr->cdev)) { |
| 713 | result = PTR_ERR(pr->cdev); |
| 714 | goto end; |
| 715 | } |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 716 | |
Greg Kroah-Hartman | fc3a882 | 2008-05-02 06:02:41 +0200 | [diff] [blame] | 717 | dev_info(&device->dev, "registered as cooling_device%d\n", |
| 718 | pr->cdev->id); |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 719 | |
| 720 | result = sysfs_create_link(&device->dev.kobj, |
| 721 | &pr->cdev->device.kobj, |
| 722 | "thermal_cooling"); |
| 723 | if (result) |
| 724 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| 725 | result = sysfs_create_link(&pr->cdev->device.kobj, |
| 726 | &device->dev.kobj, |
| 727 | "device"); |
| 728 | if (result) |
| 729 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | if (pr->flags.throttling) { |
| 732 | printk(KERN_INFO PREFIX "%s [%s] (supports", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 733 | acpi_device_name(device), acpi_device_bid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | printk(" %d throttling states", pr->throttling.state_count); |
| 735 | printk(")\n"); |
| 736 | } |
| 737 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 738 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 740 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | } |
| 742 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 743 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 745 | struct acpi_processor *pr = data; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 746 | struct acpi_device *device = NULL; |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 747 | int saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
| 749 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 750 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
| 752 | if (acpi_bus_get_device(pr->handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 753 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
| 755 | switch (event) { |
| 756 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 757 | saved = pr->performance_platform_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | acpi_processor_ppc_has_changed(pr); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 759 | if (saved == pr->performance_platform_limit) |
| 760 | break; |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 761 | acpi_bus_generate_proc_event(device, event, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 762 | pr->performance_platform_limit); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 763 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 764 | device->dev.bus_id, event, |
| 765 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | break; |
| 767 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 768 | acpi_processor_cst_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 769 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 770 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 771 | device->dev.bus_id, event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | break; |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 773 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
| 774 | acpi_processor_tstate_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 775 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 776 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 777 | device->dev.bus_id, event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | default: |
| 779 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 780 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | break; |
| 782 | } |
| 783 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 784 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | } |
| 786 | |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 787 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
| 788 | unsigned long action, void *hcpu) |
| 789 | { |
| 790 | unsigned int cpu = (unsigned long)hcpu; |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 791 | struct acpi_processor *pr = per_cpu(processors, cpu); |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 792 | |
| 793 | if (action == CPU_ONLINE && pr) { |
| 794 | acpi_processor_ppc_has_changed(pr); |
| 795 | acpi_processor_cst_has_changed(pr); |
| 796 | acpi_processor_tstate_has_changed(pr); |
| 797 | } |
| 798 | return NOTIFY_OK; |
| 799 | } |
| 800 | |
| 801 | static struct notifier_block acpi_cpu_notifier = |
| 802 | { |
| 803 | .notifier_call = acpi_cpu_soft_notify, |
| 804 | }; |
| 805 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 806 | static int acpi_processor_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 808 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
| 811 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 812 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 814 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 816 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
| 818 | pr->handle = device->handle; |
| 819 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 820 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
| 821 | acpi_driver_data(device) = pr; |
| 822 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 823 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | } |
| 825 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 826 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 828 | acpi_status status = AE_OK; |
| 829 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
| 832 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 833 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 835 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 837 | if (pr->id >= nr_cpu_ids) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | kfree(pr); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 839 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 843 | if (acpi_processor_handle_eject(pr)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 844 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | } |
| 846 | |
| 847 | acpi_processor_power_exit(pr, device); |
| 848 | |
| 849 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 850 | acpi_processor_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 852 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
| 853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | acpi_processor_remove_fs(device); |
| 855 | |
Zhao Yakui | f28bb45 | 2008-02-15 08:34:37 +0800 | [diff] [blame] | 856 | if (pr->cdev) { |
| 857 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 858 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); |
| 859 | thermal_cooling_device_unregister(pr->cdev); |
| 860 | pr->cdev = NULL; |
| 861 | } |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 862 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 863 | per_cpu(processors, pr->id) = NULL; |
| 864 | per_cpu(processor_device_array, pr->id) = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | kfree(pr); |
| 866 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 867 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 871 | /**************************************************************************** |
| 872 | * Acpi processor hotplug support * |
| 873 | ****************************************************************************/ |
| 874 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 875 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 877 | acpi_status status; |
| 878 | unsigned long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
| 881 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 882 | |
| 883 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) |
| 884 | return 1; |
| 885 | |
Zhang Rui | d0ce46f | 2008-02-23 01:53:09 -0500 | [diff] [blame] | 886 | /* |
| 887 | * _STA is mandatory for a processor that supports hot plug |
| 888 | */ |
| 889 | if (status == AE_NOT_FOUND) |
| 890 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 891 | "Processor does not support hot plug\n")); |
| 892 | else |
| 893 | ACPI_EXCEPTION((AE_INFO, status, |
| 894 | "Processor Device is not present")); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 895 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 899 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 901 | acpi_handle phandle; |
| 902 | struct acpi_device *pdev; |
| 903 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
| 906 | if (acpi_get_parent(handle, &phandle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 907 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | } |
| 909 | |
| 910 | if (acpi_bus_get_device(phandle, &pdev)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 911 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 915 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | } |
| 917 | |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 918 | acpi_bus_start(*device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | |
| 920 | pr = acpi_driver_data(*device); |
| 921 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 922 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 924 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 925 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 927 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Sam Ravnborg | b95e9e8 | 2008-02-17 13:22:48 +0100 | [diff] [blame] | 930 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
| 931 | u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 933 | struct acpi_processor *pr; |
| 934 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | int result; |
| 936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
| 938 | switch (event) { |
| 939 | case ACPI_NOTIFY_BUS_CHECK: |
| 940 | case ACPI_NOTIFY_DEVICE_CHECK: |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 941 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 942 | "Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 943 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 944 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | if (!is_processor_present(handle)) |
| 947 | break; |
| 948 | |
| 949 | if (acpi_bus_get_device(handle, &device)) { |
| 950 | result = acpi_processor_device_add(handle, &device); |
| 951 | if (result) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 952 | printk(KERN_ERR PREFIX |
| 953 | "Unable to add the device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | break; |
| 955 | } |
| 956 | |
| 957 | pr = acpi_driver_data(device); |
| 958 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 959 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | break; |
| 961 | } |
| 962 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 963 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 964 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | break; |
| 966 | } |
| 967 | |
| 968 | result = acpi_processor_start(device); |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 969 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 970 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } else { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 972 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
| 973 | acpi_device_bid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 975 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 977 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 978 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | |
| 980 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 981 | printk(KERN_ERR PREFIX |
| 982 | "Device don't exist, dropping EJECT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | break; |
| 984 | } |
| 985 | pr = acpi_driver_data(device); |
| 986 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 987 | printk(KERN_ERR PREFIX |
| 988 | "Driver data is NULL, dropping EJECT\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 989 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | } |
| 991 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 992 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 993 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | break; |
| 995 | default: |
| 996 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 997 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | break; |
| 999 | } |
| 1000 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1001 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | static acpi_status |
| 1005 | processor_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1006 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1008 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | int *action = context; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1010 | acpi_object_type type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
| 1012 | status = acpi_get_type(handle, &type); |
| 1013 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1014 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
| 1016 | if (type != ACPI_TYPE_PROCESSOR) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1017 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1019 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | case INSTALL_NOTIFY_HANDLER: |
| 1021 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1022 | ACPI_SYSTEM_NOTIFY, |
| 1023 | acpi_processor_hotplug_notify, |
| 1024 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | break; |
| 1026 | case UNINSTALL_NOTIFY_HANDLER: |
| 1027 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1028 | ACPI_SYSTEM_NOTIFY, |
| 1029 | acpi_processor_hotplug_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | break; |
| 1031 | default: |
| 1032 | break; |
| 1033 | } |
| 1034 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1035 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | } |
| 1037 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1038 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | |
| 1041 | if (!is_processor_present(handle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1042 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | } |
| 1044 | |
| 1045 | if (acpi_map_lsapic(handle, p_cpu)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1046 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | |
| 1048 | if (arch_register_cpu(*p_cpu)) { |
| 1049 | acpi_unmap_lsapic(*p_cpu); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1050 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | } |
| 1052 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1053 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | } |
| 1055 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1056 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | { |
Zhang Rui | b62b8ef | 2008-04-29 02:35:56 -0400 | [diff] [blame] | 1058 | if (cpu_online(pr->id)) |
| 1059 | cpu_down(pr->id); |
| 1060 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | arch_unregister_cpu(pr->id); |
| 1062 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1063 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | } |
| 1065 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1066 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | { |
| 1068 | return AE_ERROR; |
| 1069 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1070 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1072 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | } |
| 1074 | #endif |
| 1075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | static |
| 1077 | void acpi_processor_install_hotplug_notify(void) |
| 1078 | { |
| 1079 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1080 | int action = INSTALL_NOTIFY_HANDLER; |
| 1081 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1082 | ACPI_ROOT_OBJECT, |
| 1083 | ACPI_UINT32_MAX, |
| 1084 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1086 | register_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | } |
| 1088 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | static |
| 1090 | void acpi_processor_uninstall_hotplug_notify(void) |
| 1091 | { |
| 1092 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1093 | int action = UNINSTALL_NOTIFY_HANDLER; |
| 1094 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1095 | ACPI_ROOT_OBJECT, |
| 1096 | ACPI_UINT32_MAX, |
| 1097 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1099 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | } |
| 1101 | |
| 1102 | /* |
| 1103 | * We keep the driver loaded even when ACPI is not running. |
| 1104 | * This is needed for the powernow-k8 driver, that works even without |
| 1105 | * ACPI, but needs symbols from this driver |
| 1106 | */ |
| 1107 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1108 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1110 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | memset(&errata, 0, sizeof(errata)); |
| 1113 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1114 | #ifdef CONFIG_SMP |
| 1115 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, |
| 1116 | (struct acpi_table_header **)&madt))) |
Randy Dunlap | 70c0846 | 2007-02-13 16:11:36 -0800 | [diff] [blame] | 1117 | madt = NULL; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1118 | #endif |
| 1119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1121 | if (!acpi_processor_dir) |
Akinobu Mita | 83822fc | 2006-12-19 12:56:10 -0800 | [diff] [blame] | 1122 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | acpi_processor_dir->owner = THIS_MODULE; |
| 1124 | |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 1125 | /* |
| 1126 | * Check whether the system is DMI table. If yes, OSPM |
| 1127 | * should not use mwait for CPU-states. |
| 1128 | */ |
| 1129 | dmi_check_system(processor_idle_dmi_table); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1130 | result = cpuidle_register_driver(&acpi_idle_driver); |
| 1131 | if (result < 0) |
| 1132 | goto out_proc; |
| 1133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | result = acpi_bus_register_driver(&acpi_processor_driver); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1135 | if (result < 0) |
| 1136 | goto out_cpuidle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
| 1138 | acpi_processor_install_hotplug_notify(); |
| 1139 | |
| 1140 | acpi_thermal_cpufreq_init(); |
| 1141 | |
| 1142 | acpi_processor_ppc_init(); |
| 1143 | |
Zhao Yakui | 1180509 | 2008-01-28 13:53:42 +0800 | [diff] [blame] | 1144 | acpi_processor_throttling_init(); |
| 1145 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1146 | return 0; |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1147 | |
| 1148 | out_cpuidle: |
| 1149 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1150 | |
| 1151 | out_proc: |
| 1152 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1153 | |
| 1154 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | } |
| 1156 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1157 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | acpi_processor_ppc_exit(); |
| 1160 | |
| 1161 | acpi_thermal_cpufreq_exit(); |
| 1162 | |
| 1163 | acpi_processor_uninstall_hotplug_notify(); |
| 1164 | |
| 1165 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 1166 | |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1167 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1170 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1171 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | } |
| 1173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | module_init(acpi_processor_init); |
| 1175 | module_exit(acpi_processor_exit); |
| 1176 | |
| 1177 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); |
| 1178 | |
| 1179 | MODULE_ALIAS("processor"); |