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 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 62 | #define PREFIX "ACPI: " |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #define ACPI_PROCESSOR_CLASS "processor" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
| 66 | #define ACPI_PROCESSOR_FILE_INFO "info" |
| 67 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" |
| 68 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" |
| 69 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 |
| 70 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 71 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | #define ACPI_PROCESSOR_LIMIT_USER 0 |
| 74 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 77 | ACPI_MODULE_NAME("processor_core"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 79 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 80 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | MODULE_LICENSE("GPL"); |
| 82 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 83 | static int acpi_processor_add(struct acpi_device *device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | static int acpi_processor_remove(struct acpi_device *device, int type); |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 85 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 87 | #endif |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 88 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
| 90 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 93 | static const struct acpi_device_id processor_device_ids[] = { |
Myron Stowe | ad93a76 | 2008-11-04 14:52:55 -0700 | [diff] [blame] | 94 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
Bjorn Helgaas | 9eccbc2 | 2009-04-27 16:33:46 -0600 | [diff] [blame] | 95 | {"ACPI0007", 0}, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 96 | {"", 0}, |
| 97 | }; |
| 98 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | static struct acpi_driver acpi_processor_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 101 | .name = "processor", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 102 | .class = ACPI_PROCESSOR_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 103 | .ids = processor_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 104 | .ops = { |
| 105 | .add = acpi_processor_add, |
| 106 | .remove = acpi_processor_remove, |
Thomas Gleixner | b04e7bd | 2007-09-22 22:29:05 +0000 | [diff] [blame] | 107 | .suspend = acpi_processor_suspend, |
| 108 | .resume = acpi_processor_resume, |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 109 | .notify = acpi_processor_notify, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 110 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | #define INSTALL_NOTIFY_HANDLER 1 |
| 114 | #define UNINSTALL_NOTIFY_HANDLER 2 |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 115 | #ifdef CONFIG_ACPI_PROCFS |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 116 | static const struct file_operations acpi_processor_info_fops = { |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 117 | .owner = THIS_MODULE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 118 | .open = acpi_processor_info_open_fs, |
| 119 | .read = seq_read, |
| 120 | .llseek = seq_lseek, |
| 121 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | }; |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 123 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 125 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
Andreas Mohr | 9f22271 | 2006-06-23 02:04:27 -0700 | [diff] [blame] | 126 | struct acpi_processor_errata errata __read_mostly; |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 127 | static int set_no_mwait(const struct dmi_system_id *id) |
| 128 | { |
| 129 | printk(KERN_NOTICE PREFIX "%s detected - " |
Pavel Machek | d005741 | 2008-08-12 12:24:34 +0200 | [diff] [blame] | 130 | "disabling mwait for CPU C-states\n", id->ident); |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 131 | idle_nomwait = 1; |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { |
| 136 | { |
| 137 | set_no_mwait, "IFL91 board", { |
| 138 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), |
| 139 | DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), |
| 140 | DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), |
| 141 | DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, |
| 142 | { |
| 143 | set_no_mwait, "Extensa 5220", { |
| 144 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), |
Dennis Jansen | 3df8a90 | 2008-08-15 01:28:57 +0200 | [diff] [blame] | 145 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 146 | DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), |
| 147 | DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, |
| 148 | {}, |
| 149 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | /* -------------------------------------------------------------------------- |
| 152 | Errata Handling |
| 153 | -------------------------------------------------------------------------- */ |
| 154 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 155 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 157 | u8 value1 = 0; |
| 158 | u8 value2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
| 161 | if (!dev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 162 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
| 164 | /* |
| 165 | * Note that 'dev' references the PIIX4 ACPI Controller. |
| 166 | */ |
| 167 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 168 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | case 0: |
| 170 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); |
| 171 | break; |
| 172 | case 1: |
| 173 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); |
| 174 | break; |
| 175 | case 2: |
| 176 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); |
| 177 | break; |
| 178 | case 3: |
| 179 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); |
| 180 | break; |
| 181 | default: |
| 182 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); |
| 183 | break; |
| 184 | } |
| 185 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 186 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | case 0: /* PIIX4 A-step */ |
| 189 | case 1: /* PIIX4 B-step */ |
| 190 | /* |
| 191 | * See specification changes #13 ("Manual Throttle Duty Cycle") |
| 192 | * and #14 ("Enabling and Disabling Manual Throttle"), plus |
| 193 | * erratum #5 ("STPCLK# Deassertion Time") from the January |
| 194 | * 2002 PIIX4 specification update. Applies to only older |
| 195 | * PIIX4 models. |
| 196 | */ |
| 197 | errata.piix4.throttle = 1; |
| 198 | |
| 199 | case 2: /* PIIX4E */ |
| 200 | case 3: /* PIIX4M */ |
| 201 | /* |
| 202 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA |
| 203 | * Livelock") from the January 2002 PIIX4 specification update. |
| 204 | * Applies to all PIIX4 models. |
| 205 | */ |
| 206 | |
| 207 | /* |
| 208 | * BM-IDE |
| 209 | * ------ |
| 210 | * Find the PIIX4 IDE Controller and get the Bus Master IDE |
| 211 | * Status register address. We'll use this later to read |
| 212 | * each IDE controller's DMA status to make sure we catch all |
| 213 | * DMA activity. |
| 214 | */ |
| 215 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 216 | PCI_DEVICE_ID_INTEL_82371AB, |
| 217 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | if (dev) { |
| 219 | errata.piix4.bmisx = pci_resource_start(dev, 4); |
| 220 | pci_dev_put(dev); |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Type-F DMA |
| 225 | * ---------- |
| 226 | * Find the PIIX4 ISA Controller and read the Motherboard |
| 227 | * DMA controller's status to see if Type-F (Fast) DMA mode |
| 228 | * is enabled (bit 7) on either channel. Note that we'll |
| 229 | * disable C3 support if this is enabled, as some legacy |
| 230 | * devices won't operate well if fast DMA is disabled. |
| 231 | */ |
| 232 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 233 | PCI_DEVICE_ID_INTEL_82371AB_0, |
| 234 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | if (dev) { |
| 236 | pci_read_config_byte(dev, 0x76, &value1); |
| 237 | pci_read_config_byte(dev, 0x77, &value2); |
| 238 | if ((value1 & 0x80) || (value2 & 0x80)) |
| 239 | errata.piix4.fdma = 1; |
| 240 | pci_dev_put(dev); |
| 241 | } |
| 242 | |
| 243 | break; |
| 244 | } |
| 245 | |
| 246 | if (errata.piix4.bmisx) |
| 247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 248 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | if (errata.piix4.fdma) |
| 250 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 251 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 253 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 256 | static int acpi_processor_errata(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 258 | int result = 0; |
| 259 | struct pci_dev *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
| 262 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 263 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | /* |
| 266 | * PIIX4 |
| 267 | */ |
| 268 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 269 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
| 270 | PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | if (dev) { |
| 272 | result = acpi_processor_errata_piix4(dev); |
| 273 | pci_dev_put(dev); |
| 274 | } |
| 275 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 276 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
| 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | /* -------------------------------------------------------------------------- |
Akinobu Mita | 0b28002 | 2006-03-26 01:38:58 -0800 | [diff] [blame] | 280 | Common ACPI processor functions |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 281 | -------------------------------------------------------------------------- */ |
| 282 | |
| 283 | /* |
| 284 | * _PDC is required for a BIOS-OS handshake for most of the newer |
| 285 | * ACPI processor features. |
| 286 | */ |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 287 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
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 | struct acpi_object_list *pdc_in = pr->pdc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 290 | acpi_status status = AE_OK; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 291 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 292 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 293 | if (!pdc_in) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 294 | return status; |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 295 | if (idle_nomwait) { |
| 296 | /* |
| 297 | * If mwait is disabled for CPU C-states, the C2C3_FFH access |
| 298 | * mode will be disabled in the parameter of _PDC object. |
| 299 | * Of course C1_FFH access mode will also be disabled. |
| 300 | */ |
| 301 | union acpi_object *obj; |
| 302 | u32 *buffer = NULL; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 303 | |
Zhao Yakui | da5e09a | 2008-06-24 18:01:09 +0800 | [diff] [blame] | 304 | obj = pdc_in->pointer; |
| 305 | buffer = (u32 *)(obj->buffer.pointer); |
| 306 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); |
| 307 | |
| 308 | } |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 309 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 310 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 311 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 312 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 313 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 314 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 315 | return status; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 316 | } |
| 317 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 318 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | FS Interface (/proc) |
| 320 | -------------------------------------------------------------------------- */ |
| 321 | |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 322 | #ifdef CONFIG_ACPI_PROCFS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 323 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
| 325 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) |
| 326 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 327 | struct acpi_processor *pr = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | if (!pr) |
| 331 | goto end; |
| 332 | |
| 333 | seq_printf(seq, "processor id: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 334 | "acpi id: %d\n" |
| 335 | "bus mastering control: %s\n" |
| 336 | "power management: %s\n" |
| 337 | "throttling control: %s\n" |
| 338 | "limit interface: %s\n", |
| 339 | pr->id, |
| 340 | pr->acpi_id, |
| 341 | pr->flags.bm_control ? "yes" : "no", |
| 342 | pr->flags.power ? "yes" : "no", |
| 343 | pr->flags.throttling ? "yes" : "no", |
| 344 | pr->flags.limit ? "yes" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 346 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 347 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) |
| 351 | { |
| 352 | return single_open(file, acpi_processor_info_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 353 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 356 | static int acpi_processor_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 358 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | if (!acpi_device_dir(device)) { |
| 362 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 363 | acpi_processor_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 365 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
| 368 | /* 'info' [R] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 369 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
| 370 | S_IRUGO, acpi_device_dir(device), |
| 371 | &acpi_processor_info_fops, |
| 372 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 374 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
| 376 | /* 'throttling' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 377 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
| 378 | S_IFREG | S_IRUGO | S_IWUSR, |
| 379 | acpi_device_dir(device), |
| 380 | &acpi_processor_throttling_fops, |
| 381 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 383 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
| 385 | /* 'limit' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 386 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
| 387 | S_IFREG | S_IRUGO | S_IWUSR, |
| 388 | acpi_device_dir(device), |
| 389 | &acpi_processor_limit_fops, |
| 390 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 392 | return -EIO; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 393 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 395 | static int acpi_processor_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
| 398 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 399 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
| 400 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 402 | acpi_device_dir(device)); |
| 403 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
| 404 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
| 406 | acpi_device_dir(device) = NULL; |
| 407 | } |
| 408 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 409 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 411 | #else |
| 412 | static inline int acpi_processor_add_fs(struct acpi_device *device) |
| 413 | { |
| 414 | return 0; |
| 415 | } |
| 416 | static inline int acpi_processor_remove_fs(struct acpi_device *device) |
| 417 | { |
| 418 | return 0; |
| 419 | } |
| 420 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | /* Use the acpiid in MADT to map cpus in case of SMP */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | #ifndef CONFIG_SMP |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 425 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | #else |
| 427 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 428 | static struct acpi_table_madt *madt; |
| 429 | |
| 430 | static int map_lapic_id(struct acpi_subtable_header *entry, |
| 431 | u32 acpi_id, int *apic_id) |
| 432 | { |
| 433 | struct acpi_madt_local_apic *lapic = |
| 434 | (struct acpi_madt_local_apic *)entry; |
| 435 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && |
| 436 | lapic->processor_id == acpi_id) { |
| 437 | *apic_id = lapic->id; |
| 438 | return 1; |
| 439 | } |
| 440 | return 0; |
| 441 | } |
| 442 | |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 443 | static int map_x2apic_id(struct acpi_subtable_header *entry, |
| 444 | int device_declaration, u32 acpi_id, int *apic_id) |
| 445 | { |
| 446 | struct acpi_madt_local_x2apic *apic = |
| 447 | (struct acpi_madt_local_x2apic *)entry; |
| 448 | u32 tmp = apic->local_apic_id; |
| 449 | |
| 450 | /* Only check enabled APICs*/ |
| 451 | if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) |
| 452 | return 0; |
| 453 | |
| 454 | /* Device statement declaration type */ |
| 455 | if (device_declaration) { |
| 456 | if (apic->uid == acpi_id) |
| 457 | goto found; |
| 458 | } |
| 459 | |
| 460 | return 0; |
| 461 | found: |
| 462 | *apic_id = tmp; |
| 463 | return 1; |
| 464 | } |
| 465 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 466 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 467 | int device_declaration, u32 acpi_id, int *apic_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 468 | { |
| 469 | struct acpi_madt_local_sapic *lsapic = |
| 470 | (struct acpi_madt_local_sapic *)entry; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 471 | u32 tmp = (lsapic->id << 8) | lsapic->eid; |
| 472 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 473 | /* Only check enabled APICs*/ |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 474 | if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) |
| 475 | return 0; |
| 476 | |
| 477 | /* Device statement declaration type */ |
| 478 | if (device_declaration) { |
| 479 | if (entry->length < 16) |
| 480 | printk(KERN_ERR PREFIX |
| 481 | "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n", |
| 482 | tmp); |
| 483 | else if (lsapic->uid == acpi_id) |
| 484 | goto found; |
| 485 | /* Processor statement declaration type */ |
| 486 | } else if (lsapic->processor_id == acpi_id) |
| 487 | goto found; |
| 488 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 489 | return 0; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 490 | found: |
| 491 | *apic_id = tmp; |
| 492 | return 1; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 493 | } |
| 494 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 495 | static int map_madt_entry(int type, u32 acpi_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | { |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 497 | unsigned long madt_end, entry; |
| 498 | int apic_id = -1; |
| 499 | |
| 500 | if (!madt) |
| 501 | return apic_id; |
| 502 | |
| 503 | entry = (unsigned long)madt; |
| 504 | madt_end = entry + madt->header.length; |
| 505 | |
| 506 | /* Parse all entries looking for a match. */ |
| 507 | |
| 508 | entry += sizeof(struct acpi_table_madt); |
| 509 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { |
| 510 | struct acpi_subtable_header *header = |
| 511 | (struct acpi_subtable_header *)entry; |
| 512 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 513 | if (map_lapic_id(header, acpi_id, &apic_id)) |
| 514 | break; |
Suresh Siddha | 7237d3d | 2009-03-30 13:55:30 -0800 | [diff] [blame] | 515 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { |
| 516 | if (map_x2apic_id(header, type, acpi_id, &apic_id)) |
| 517 | break; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 518 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 519 | if (map_lsapic_id(header, type, acpi_id, &apic_id)) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 520 | break; |
| 521 | } |
| 522 | entry += header->length; |
| 523 | } |
| 524 | return apic_id; |
| 525 | } |
| 526 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 527 | static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 528 | { |
| 529 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 530 | union acpi_object *obj; |
| 531 | struct acpi_subtable_header *header; |
| 532 | int apic_id = -1; |
| 533 | |
| 534 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
| 535 | goto exit; |
| 536 | |
| 537 | if (!buffer.length || !buffer.pointer) |
| 538 | goto exit; |
| 539 | |
| 540 | obj = buffer.pointer; |
| 541 | if (obj->type != ACPI_TYPE_BUFFER || |
| 542 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { |
| 543 | goto exit; |
| 544 | } |
| 545 | |
| 546 | header = (struct acpi_subtable_header *)obj->buffer.pointer; |
| 547 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 548 | map_lapic_id(header, acpi_id, &apic_id); |
| 549 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 550 | map_lsapic_id(header, type, acpi_id, &apic_id); |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | exit: |
| 554 | if (buffer.pointer) |
| 555 | kfree(buffer.pointer); |
| 556 | return apic_id; |
| 557 | } |
| 558 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 559 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 560 | { |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 561 | int i; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 562 | int apic_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 564 | apic_id = map_mat_entry(handle, type, acpi_id); |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 565 | if (apic_id == -1) |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 566 | apic_id = map_madt_entry(type, acpi_id); |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 567 | if (apic_id == -1) |
| 568 | return apic_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 570 | for_each_possible_cpu(i) { |
Mike Travis | 71b3123 | 2007-10-19 20:35:03 +0200 | [diff] [blame] | 571 | if (cpu_physical_id(i) == apic_id) |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 572 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | } |
| 574 | return -1; |
| 575 | } |
| 576 | #endif |
| 577 | |
| 578 | /* -------------------------------------------------------------------------- |
| 579 | Driver Interface |
| 580 | -------------------------------------------------------------------------- */ |
| 581 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 582 | static int acpi_processor_get_info(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 584 | acpi_status status = 0; |
| 585 | union acpi_object object = { 0 }; |
| 586 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 587 | struct acpi_processor *pr; |
| 588 | int cpu_index, device_declaration = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 589 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 591 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 593 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | |
| 595 | if (num_online_cpus() > 1) |
| 596 | errata.smp = TRUE; |
| 597 | |
| 598 | acpi_processor_errata(pr); |
| 599 | |
| 600 | /* |
| 601 | * Check to see if we have bus mastering arbitration control. This |
| 602 | * is required for proper C3 usage (to maintain cache coherency). |
| 603 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 604 | 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] | 605 | pr->flags.bm_control = 1; |
| 606 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 607 | "Bus mastering arbitration control present\n")); |
| 608 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 610 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | |
Bjorn Helgaas | 6cc73b4 | 2009-04-27 16:33:41 -0600 | [diff] [blame] | 612 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
| 613 | /* Declared with "Processor" statement; match ProcessorID */ |
| 614 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 615 | if (ACPI_FAILURE(status)) { |
| 616 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); |
| 617 | return -ENODEV; |
| 618 | } |
| 619 | |
| 620 | /* |
| 621 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
| 622 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in |
| 623 | * arch/xxx/acpi.c |
| 624 | */ |
| 625 | pr->acpi_id = object.processor.proc_id; |
| 626 | } else { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 627 | /* |
| 628 | * Declared with "Device" statement; match _UID. |
| 629 | * Note that we don't handle string _UIDs yet. |
| 630 | */ |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 631 | unsigned long long value; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 632 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
| 633 | NULL, &value); |
| 634 | if (ACPI_FAILURE(status)) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 635 | printk(KERN_ERR PREFIX |
| 636 | "Evaluating processor _UID [%#x]\n", status); |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 637 | return -ENODEV; |
| 638 | } |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 639 | device_declaration = 1; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 640 | pr->acpi_id = value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | } |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 642 | cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 644 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 645 | if (!cpu0_initialized && (cpu_index == -1) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 646 | (num_online_cpus() == 1)) { |
| 647 | cpu_index = 0; |
| 648 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 650 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 652 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 654 | /* |
| 655 | * Extra Processor objects may be enumerated on MP systems with |
| 656 | * less than the max # of CPUs. They should be ignored _iff |
| 657 | * they are physically not present. |
| 658 | */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 659 | if (pr->id == -1) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 660 | if (ACPI_FAILURE |
| 661 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 662 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 663 | } |
| 664 | } |
Zhao Yakui | 7a04b84 | 2009-06-24 11:46:44 +0800 | [diff] [blame] | 665 | /* |
| 666 | * On some boxes several processors use the same processor bus id. |
| 667 | * But they are located in different scope. For example: |
| 668 | * \_SB.SCK0.CPU0 |
| 669 | * \_SB.SCK1.CPU0 |
| 670 | * Rename the processor device bus id. And the new bus id will be |
| 671 | * generated as the following format: |
| 672 | * CPU+CPU ID. |
| 673 | */ |
| 674 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 676 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | if (!object.processor.pblk_address) |
| 679 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 680 | else if (object.processor.pblk_length != 6) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 681 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
| 682 | object.processor.pblk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | else { |
| 684 | pr->throttling.address = object.processor.pblk_address; |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 685 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
| 686 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
| 688 | pr->pblk = object.processor.pblk_address; |
| 689 | |
| 690 | /* |
| 691 | * We don't care about error returns - we just try to mark |
| 692 | * these reserved so that nobody else is confused into thinking |
| 693 | * that this region might be unused.. |
| 694 | * |
| 695 | * (In particular, allocating the IO range for Cardbus) |
| 696 | */ |
| 697 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 698 | } |
| 699 | |
Alex Chiang | fe086a7 | 2008-04-29 15:05:29 -0700 | [diff] [blame] | 700 | /* |
| 701 | * If ACPI describes a slot number for this CPU, we can use it |
| 702 | * ensure we get the right value in the "physical id" field |
| 703 | * of /proc/cpuinfo |
| 704 | */ |
| 705 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); |
| 706 | if (ACPI_SUCCESS(status)) |
| 707 | arch_fix_phys_package_id(pr->id, object.integer.value); |
| 708 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 709 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
| 711 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 712 | static DEFINE_PER_CPU(void *, processor_device_array); |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 713 | |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 714 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 716 | struct acpi_processor *pr = acpi_driver_data(device); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 717 | int saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
| 719 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 720 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | switch (event) { |
| 723 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 724 | saved = pr->performance_platform_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | acpi_processor_ppc_has_changed(pr); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 726 | if (saved == pr->performance_platform_limit) |
| 727 | break; |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 728 | acpi_bus_generate_proc_event(device, event, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 729 | pr->performance_platform_limit); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 730 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 731 | dev_name(&device->dev), event, |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 732 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | break; |
| 734 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 735 | acpi_processor_cst_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 736 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 737 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 738 | dev_name(&device->dev), event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | break; |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 740 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
| 741 | acpi_processor_tstate_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 742 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 743 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 744 | dev_name(&device->dev), event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | default: |
| 746 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 747 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | break; |
| 749 | } |
| 750 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 751 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | } |
| 753 | |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 754 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
| 755 | unsigned long action, void *hcpu) |
| 756 | { |
| 757 | unsigned int cpu = (unsigned long)hcpu; |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 758 | struct acpi_processor *pr = per_cpu(processors, cpu); |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 759 | |
| 760 | if (action == CPU_ONLINE && pr) { |
| 761 | acpi_processor_ppc_has_changed(pr); |
| 762 | acpi_processor_cst_has_changed(pr); |
| 763 | acpi_processor_tstate_has_changed(pr); |
| 764 | } |
| 765 | return NOTIFY_OK; |
| 766 | } |
| 767 | |
| 768 | static struct notifier_block acpi_cpu_notifier = |
| 769 | { |
| 770 | .notifier_call = acpi_cpu_soft_notify, |
| 771 | }; |
| 772 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 773 | static int acpi_processor_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 775 | struct acpi_processor *pr = NULL; |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 776 | int result = 0; |
| 777 | struct sys_device *sysdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 779 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 781 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 783 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 784 | kfree(pr); |
| 785 | return -ENOMEM; |
| 786 | } |
| 787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | pr->handle = device->handle; |
| 789 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 790 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 791 | device->driver_data = pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | result = acpi_processor_get_info(device); |
| 794 | if (result) { |
| 795 | /* Processor is physically not present */ |
| 796 | return 0; |
| 797 | } |
| 798 | |
| 799 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
| 800 | |
| 801 | /* |
| 802 | * Buggy BIOS check |
| 803 | * ACPI id of processors can be reported wrongly by the BIOS. |
| 804 | * Don't trust it blindly |
| 805 | */ |
| 806 | if (per_cpu(processor_device_array, pr->id) != NULL && |
| 807 | per_cpu(processor_device_array, pr->id) != device) { |
| 808 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
| 809 | "for the processor\n"); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 810 | result = -ENODEV; |
| 811 | goto err_free_cpumask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | } |
| 813 | per_cpu(processor_device_array, pr->id) = device; |
| 814 | |
| 815 | per_cpu(processors, pr->id) = pr; |
| 816 | |
| 817 | result = acpi_processor_add_fs(device); |
| 818 | if (result) |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 819 | goto err_free_cpumask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
| 821 | sysdev = get_cpu_sysdev(pr->id); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 822 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) { |
| 823 | result = -EFAULT; |
| 824 | goto err_remove_fs; |
| 825 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | |
| 827 | /* _PDC call should be done before doing anything else (if reqd.). */ |
| 828 | arch_acpi_processor_init_pdc(pr); |
| 829 | acpi_processor_set_pdc(pr); |
| 830 | arch_acpi_processor_cleanup_pdc(pr); |
| 831 | |
| 832 | #ifdef CONFIG_CPU_FREQ |
| 833 | acpi_processor_ppc_has_changed(pr); |
| 834 | #endif |
| 835 | acpi_processor_get_throttling_info(pr); |
| 836 | acpi_processor_get_limit_info(pr); |
| 837 | |
| 838 | |
| 839 | acpi_processor_power_init(pr, device); |
| 840 | |
| 841 | pr->cdev = thermal_cooling_device_register("Processor", device, |
| 842 | &processor_cooling_ops); |
| 843 | if (IS_ERR(pr->cdev)) { |
| 844 | result = PTR_ERR(pr->cdev); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 845 | goto err_power_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | dev_info(&device->dev, "registered as cooling_device%d\n", |
| 849 | pr->cdev->id); |
| 850 | |
| 851 | result = sysfs_create_link(&device->dev.kobj, |
| 852 | &pr->cdev->device.kobj, |
| 853 | "thermal_cooling"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 854 | if (result) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 856 | goto err_thermal_unregister; |
| 857 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | result = sysfs_create_link(&pr->cdev->device.kobj, |
| 859 | &device->dev.kobj, |
| 860 | "device"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 861 | if (result) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 863 | goto err_remove_sysfs; |
| 864 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 866 | return 0; |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 867 | |
| 868 | err_remove_sysfs: |
| 869 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 870 | err_thermal_unregister: |
| 871 | thermal_cooling_device_unregister(pr->cdev); |
| 872 | err_power_exit: |
| 873 | acpi_processor_power_exit(pr, device); |
| 874 | err_remove_fs: |
| 875 | acpi_processor_remove_fs(device); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 876 | err_free_cpumask: |
| 877 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | |
| 879 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | } |
| 881 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 882 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 884 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 888 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 890 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 892 | if (pr->id >= nr_cpu_ids) |
| 893 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
| 895 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 896 | if (acpi_processor_handle_eject(pr)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 897 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | } |
| 899 | |
| 900 | acpi_processor_power_exit(pr, device); |
| 901 | |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 902 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
| 903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | acpi_processor_remove_fs(device); |
| 905 | |
Zhao Yakui | f28bb45 | 2008-02-15 08:34:37 +0800 | [diff] [blame] | 906 | if (pr->cdev) { |
| 907 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 908 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); |
| 909 | thermal_cooling_device_unregister(pr->cdev); |
| 910 | pr->cdev = NULL; |
| 911 | } |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 912 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 913 | per_cpu(processors, pr->id) = NULL; |
| 914 | per_cpu(processor_device_array, pr->id) = NULL; |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 915 | |
| 916 | free: |
| 917 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | kfree(pr); |
| 919 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 920 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 924 | /**************************************************************************** |
| 925 | * Acpi processor hotplug support * |
| 926 | ****************************************************************************/ |
| 927 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 928 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 930 | acpi_status status; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 931 | unsigned long long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
| 934 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 935 | |
| 936 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) |
| 937 | return 1; |
| 938 | |
Zhang Rui | d0ce46f | 2008-02-23 01:53:09 -0500 | [diff] [blame] | 939 | /* |
| 940 | * _STA is mandatory for a processor that supports hot plug |
| 941 | */ |
| 942 | if (status == AE_NOT_FOUND) |
| 943 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 944 | "Processor does not support hot plug\n")); |
| 945 | else |
| 946 | ACPI_EXCEPTION((AE_INFO, status, |
| 947 | "Processor Device is not present")); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 948 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | } |
| 950 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 952 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 954 | acpi_handle phandle; |
| 955 | struct acpi_device *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | |
| 958 | if (acpi_get_parent(handle, &phandle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 959 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | } |
| 961 | |
| 962 | if (acpi_bus_get_device(phandle, &pdev)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 963 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 967 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | } |
| 969 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 970 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } |
| 972 | |
Sam Ravnborg | b95e9e8 | 2008-02-17 13:22:48 +0100 | [diff] [blame] | 973 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
| 974 | u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 976 | struct acpi_processor *pr; |
| 977 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | int result; |
| 979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
| 981 | switch (event) { |
| 982 | case ACPI_NOTIFY_BUS_CHECK: |
| 983 | case ACPI_NOTIFY_DEVICE_CHECK: |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 984 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 985 | "Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 986 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 987 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | |
| 989 | if (!is_processor_present(handle)) |
| 990 | break; |
| 991 | |
| 992 | if (acpi_bus_get_device(handle, &device)) { |
| 993 | result = acpi_processor_device_add(handle, &device); |
| 994 | if (result) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 995 | printk(KERN_ERR PREFIX |
| 996 | "Unable to add the device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | break; |
| 998 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 999 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1001 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1002 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | |
| 1004 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1005 | printk(KERN_ERR PREFIX |
| 1006 | "Device don't exist, dropping EJECT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | break; |
| 1008 | } |
| 1009 | pr = acpi_driver_data(device); |
| 1010 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1011 | printk(KERN_ERR PREFIX |
| 1012 | "Driver data is NULL, dropping EJECT\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1013 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | break; |
| 1016 | default: |
| 1017 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1018 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | break; |
| 1020 | } |
| 1021 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1022 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | } |
| 1024 | |
| 1025 | static acpi_status |
| 1026 | processor_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1027 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1029 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | int *action = context; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1031 | acpi_object_type type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
| 1033 | status = acpi_get_type(handle, &type); |
| 1034 | if (ACPI_FAILURE(status)) |
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 | if (type != ACPI_TYPE_PROCESSOR) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1038 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1040 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | case INSTALL_NOTIFY_HANDLER: |
| 1042 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1043 | ACPI_SYSTEM_NOTIFY, |
| 1044 | acpi_processor_hotplug_notify, |
| 1045 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | break; |
| 1047 | case UNINSTALL_NOTIFY_HANDLER: |
| 1048 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1049 | ACPI_SYSTEM_NOTIFY, |
| 1050 | acpi_processor_hotplug_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | break; |
| 1052 | default: |
| 1053 | break; |
| 1054 | } |
| 1055 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1056 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
| 1058 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1059 | 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] | 1060 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
| 1062 | if (!is_processor_present(handle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1063 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | } |
| 1065 | |
| 1066 | if (acpi_map_lsapic(handle, p_cpu)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1067 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
| 1069 | if (arch_register_cpu(*p_cpu)) { |
| 1070 | acpi_unmap_lsapic(*p_cpu); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1071 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | } |
| 1073 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1074 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | } |
| 1076 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1077 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | { |
Zhang Rui | b62b8ef | 2008-04-29 02:35:56 -0400 | [diff] [blame] | 1079 | if (cpu_online(pr->id)) |
| 1080 | cpu_down(pr->id); |
| 1081 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | arch_unregister_cpu(pr->id); |
| 1083 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1084 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | } |
| 1086 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1087 | 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] | 1088 | { |
| 1089 | return AE_ERROR; |
| 1090 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1091 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1093 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | } |
| 1095 | #endif |
| 1096 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | static |
| 1098 | void acpi_processor_install_hotplug_notify(void) |
| 1099 | { |
| 1100 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1101 | int action = INSTALL_NOTIFY_HANDLER; |
| 1102 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1103 | ACPI_ROOT_OBJECT, |
| 1104 | ACPI_UINT32_MAX, |
| 1105 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1107 | register_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | } |
| 1109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | static |
| 1111 | void acpi_processor_uninstall_hotplug_notify(void) |
| 1112 | { |
| 1113 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1114 | int action = UNINSTALL_NOTIFY_HANDLER; |
| 1115 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1116 | ACPI_ROOT_OBJECT, |
| 1117 | ACPI_UINT32_MAX, |
| 1118 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1120 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | /* |
| 1124 | * We keep the driver loaded even when ACPI is not running. |
| 1125 | * This is needed for the powernow-k8 driver, that works even without |
| 1126 | * ACPI, but needs symbols from this driver |
| 1127 | */ |
| 1128 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1129 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1131 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 1133 | if (acpi_disabled) |
| 1134 | return 0; |
| 1135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | memset(&errata, 0, sizeof(errata)); |
| 1137 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1138 | #ifdef CONFIG_SMP |
| 1139 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, |
| 1140 | (struct acpi_table_header **)&madt))) |
Randy Dunlap | 70c0846 | 2007-02-13 16:11:36 -0800 | [diff] [blame] | 1141 | madt = NULL; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1142 | #endif |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 1143 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1145 | if (!acpi_processor_dir) |
Akinobu Mita | 83822fc | 2006-12-19 12:56:10 -0800 | [diff] [blame] | 1146 | return -ENOMEM; |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 1147 | #endif |
Zhao Yakui | 2a2a647 | 2008-06-24 18:02:57 +0800 | [diff] [blame] | 1148 | /* |
| 1149 | * Check whether the system is DMI table. If yes, OSPM |
| 1150 | * should not use mwait for CPU-states. |
| 1151 | */ |
| 1152 | dmi_check_system(processor_idle_dmi_table); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1153 | result = cpuidle_register_driver(&acpi_idle_driver); |
| 1154 | if (result < 0) |
| 1155 | goto out_proc; |
| 1156 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | result = acpi_bus_register_driver(&acpi_processor_driver); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1158 | if (result < 0) |
| 1159 | goto out_cpuidle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | |
| 1161 | acpi_processor_install_hotplug_notify(); |
| 1162 | |
| 1163 | acpi_thermal_cpufreq_init(); |
| 1164 | |
| 1165 | acpi_processor_ppc_init(); |
| 1166 | |
Zhao Yakui | 1180509 | 2008-01-28 13:53:42 +0800 | [diff] [blame] | 1167 | acpi_processor_throttling_init(); |
| 1168 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1169 | return 0; |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1170 | |
| 1171 | out_cpuidle: |
| 1172 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1173 | |
| 1174 | out_proc: |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 1175 | #ifdef CONFIG_ACPI_PROCFS |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1176 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 1177 | #endif |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1178 | |
| 1179 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | } |
| 1181 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1182 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | { |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 1184 | if (acpi_disabled) |
| 1185 | return; |
| 1186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | acpi_processor_ppc_exit(); |
| 1188 | |
| 1189 | acpi_thermal_cpufreq_exit(); |
| 1190 | |
| 1191 | acpi_processor_uninstall_hotplug_notify(); |
| 1192 | |
| 1193 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 1194 | |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1195 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1196 | |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 1197 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 1199 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1201 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | } |
| 1203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | module_init(acpi_processor_init); |
| 1205 | module_exit(acpi_processor_exit); |
| 1206 | |
| 1207 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); |
| 1208 | |
| 1209 | MODULE_ALIAS("processor"); |