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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 48 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | #include <asm/io.h> |
| 51 | #include <asm/system.h> |
| 52 | #include <asm/cpu.h> |
| 53 | #include <asm/delay.h> |
| 54 | #include <asm/uaccess.h> |
| 55 | #include <asm/processor.h> |
| 56 | #include <asm/smp.h> |
| 57 | #include <asm/acpi.h> |
| 58 | |
| 59 | #include <acpi/acpi_bus.h> |
| 60 | #include <acpi/acpi_drivers.h> |
| 61 | #include <acpi/processor.h> |
| 62 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 63 | #define PREFIX "ACPI: " |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #define ACPI_PROCESSOR_CLASS "processor" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
| 67 | #define ACPI_PROCESSOR_FILE_INFO "info" |
| 68 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" |
| 69 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" |
| 70 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 |
| 71 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 72 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | #define ACPI_PROCESSOR_LIMIT_USER 0 |
| 75 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 |
| 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Alex Chiang | 0131aa3 | 2010-02-22 12:11:08 -0700 | [diff] [blame] | 78 | ACPI_MODULE_NAME("processor_driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 80 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 81 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | MODULE_LICENSE("GPL"); |
| 83 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | static int acpi_processor_add(struct acpi_device *device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 85 | static int acpi_processor_remove(struct acpi_device *device, int type); |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 86 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | 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] | 88 | #endif |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 89 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
| 91 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 94 | static const struct acpi_device_id processor_device_ids[] = { |
Myron Stowe | ad93a76 | 2008-11-04 14:52:55 -0700 | [diff] [blame] | 95 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
Bjorn Helgaas | 9eccbc2 | 2009-04-27 16:33:46 -0600 | [diff] [blame] | 96 | {"ACPI0007", 0}, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 97 | {"", 0}, |
| 98 | }; |
| 99 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | static struct acpi_driver acpi_processor_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 102 | .name = "processor", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 103 | .class = ACPI_PROCESSOR_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 104 | .ids = processor_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 105 | .ops = { |
| 106 | .add = acpi_processor_add, |
| 107 | .remove = acpi_processor_remove, |
Thomas Gleixner | b04e7bd | 2007-09-22 22:29:05 +0000 | [diff] [blame] | 108 | .suspend = acpi_processor_suspend, |
| 109 | .resume = acpi_processor_resume, |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 110 | .notify = acpi_processor_notify, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 111 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | #define INSTALL_NOTIFY_HANDLER 1 |
| 115 | #define UNINSTALL_NOTIFY_HANDLER 2 |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 116 | #ifdef CONFIG_ACPI_PROCFS |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 117 | static const struct file_operations acpi_processor_info_fops = { |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 118 | .owner = THIS_MODULE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 119 | .open = acpi_processor_info_open_fs, |
| 120 | .read = seq_read, |
| 121 | .llseek = seq_lseek, |
| 122 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | }; |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 124 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 126 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
Naga Chumbalkar | 0f1d683 | 2009-12-17 20:18:27 +0000 | [diff] [blame] | 127 | EXPORT_PER_CPU_SYMBOL(processors); |
| 128 | |
Andreas Mohr | 9f22271 | 2006-06-23 02:04:27 -0700 | [diff] [blame] | 129 | struct acpi_processor_errata errata __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | /* -------------------------------------------------------------------------- |
| 132 | Errata Handling |
| 133 | -------------------------------------------------------------------------- */ |
| 134 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 135 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 137 | u8 value1 = 0; |
| 138 | u8 value2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | if (!dev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 142 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
| 144 | /* |
| 145 | * Note that 'dev' references the PIIX4 ACPI Controller. |
| 146 | */ |
| 147 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 148 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | case 0: |
| 150 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); |
| 151 | break; |
| 152 | case 1: |
| 153 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); |
| 154 | break; |
| 155 | case 2: |
| 156 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); |
| 157 | break; |
| 158 | case 3: |
| 159 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); |
| 160 | break; |
| 161 | default: |
| 162 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); |
| 163 | break; |
| 164 | } |
| 165 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 166 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
| 168 | case 0: /* PIIX4 A-step */ |
| 169 | case 1: /* PIIX4 B-step */ |
| 170 | /* |
| 171 | * See specification changes #13 ("Manual Throttle Duty Cycle") |
| 172 | * and #14 ("Enabling and Disabling Manual Throttle"), plus |
| 173 | * erratum #5 ("STPCLK# Deassertion Time") from the January |
| 174 | * 2002 PIIX4 specification update. Applies to only older |
| 175 | * PIIX4 models. |
| 176 | */ |
| 177 | errata.piix4.throttle = 1; |
| 178 | |
| 179 | case 2: /* PIIX4E */ |
| 180 | case 3: /* PIIX4M */ |
| 181 | /* |
| 182 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA |
| 183 | * Livelock") from the January 2002 PIIX4 specification update. |
| 184 | * Applies to all PIIX4 models. |
| 185 | */ |
| 186 | |
| 187 | /* |
| 188 | * BM-IDE |
| 189 | * ------ |
| 190 | * Find the PIIX4 IDE Controller and get the Bus Master IDE |
| 191 | * Status register address. We'll use this later to read |
| 192 | * each IDE controller's DMA status to make sure we catch all |
| 193 | * DMA activity. |
| 194 | */ |
| 195 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 196 | PCI_DEVICE_ID_INTEL_82371AB, |
| 197 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | if (dev) { |
| 199 | errata.piix4.bmisx = pci_resource_start(dev, 4); |
| 200 | pci_dev_put(dev); |
| 201 | } |
| 202 | |
| 203 | /* |
| 204 | * Type-F DMA |
| 205 | * ---------- |
| 206 | * Find the PIIX4 ISA Controller and read the Motherboard |
| 207 | * DMA controller's status to see if Type-F (Fast) DMA mode |
| 208 | * is enabled (bit 7) on either channel. Note that we'll |
| 209 | * disable C3 support if this is enabled, as some legacy |
| 210 | * devices won't operate well if fast DMA is disabled. |
| 211 | */ |
| 212 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 213 | PCI_DEVICE_ID_INTEL_82371AB_0, |
| 214 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (dev) { |
| 216 | pci_read_config_byte(dev, 0x76, &value1); |
| 217 | pci_read_config_byte(dev, 0x77, &value2); |
| 218 | if ((value1 & 0x80) || (value2 & 0x80)) |
| 219 | errata.piix4.fdma = 1; |
| 220 | pci_dev_put(dev); |
| 221 | } |
| 222 | |
| 223 | break; |
| 224 | } |
| 225 | |
| 226 | if (errata.piix4.bmisx) |
| 227 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 228 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | if (errata.piix4.fdma) |
| 230 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 231 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 233 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } |
| 235 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 236 | static int acpi_processor_errata(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 238 | int result = 0; |
| 239 | struct pci_dev *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 243 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | /* |
| 246 | * PIIX4 |
| 247 | */ |
| 248 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 249 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
| 250 | PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | if (dev) { |
| 252 | result = acpi_processor_errata_piix4(dev); |
| 253 | pci_dev_put(dev); |
| 254 | } |
| 255 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 256 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | /* -------------------------------------------------------------------------- |
| 260 | FS Interface (/proc) |
| 261 | -------------------------------------------------------------------------- */ |
| 262 | |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 263 | #ifdef CONFIG_ACPI_PROCFS |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 264 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
| 266 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) |
| 267 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 268 | struct acpi_processor *pr = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | if (!pr) |
| 272 | goto end; |
| 273 | |
| 274 | seq_printf(seq, "processor id: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 275 | "acpi id: %d\n" |
| 276 | "bus mastering control: %s\n" |
| 277 | "power management: %s\n" |
| 278 | "throttling control: %s\n" |
| 279 | "limit interface: %s\n", |
| 280 | pr->id, |
| 281 | pr->acpi_id, |
| 282 | pr->flags.bm_control ? "yes" : "no", |
| 283 | pr->flags.power ? "yes" : "no", |
| 284 | pr->flags.throttling ? "yes" : "no", |
| 285 | pr->flags.limit ? "yes" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 287 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 288 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) |
| 292 | { |
| 293 | return single_open(file, acpi_processor_info_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |
| 296 | |
Thomas Renninger | bf8b454 | 2009-10-26 17:44:18 +0100 | [diff] [blame] | 297 | static int __cpuinit acpi_processor_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 299 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | if (!acpi_device_dir(device)) { |
| 303 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 304 | acpi_processor_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 306 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
| 309 | /* 'info' [R] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 310 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
| 311 | S_IRUGO, acpi_device_dir(device), |
| 312 | &acpi_processor_info_fops, |
| 313 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 315 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | /* 'throttling' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 318 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
| 319 | S_IFREG | S_IRUGO | S_IWUSR, |
| 320 | acpi_device_dir(device), |
| 321 | &acpi_processor_throttling_fops, |
| 322 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 324 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | /* 'limit' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 327 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
| 328 | S_IFREG | S_IRUGO | S_IWUSR, |
| 329 | acpi_device_dir(device), |
| 330 | &acpi_processor_limit_fops, |
| 331 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 333 | return -EIO; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 334 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 336 | static int acpi_processor_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 340 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
| 341 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 343 | acpi_device_dir(device)); |
| 344 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
| 345 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
| 347 | acpi_device_dir(device) = NULL; |
| 348 | } |
| 349 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 350 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 352 | #else |
| 353 | static inline int acpi_processor_add_fs(struct acpi_device *device) |
| 354 | { |
| 355 | return 0; |
| 356 | } |
| 357 | static inline int acpi_processor_remove_fs(struct acpi_device *device) |
| 358 | { |
| 359 | return 0; |
| 360 | } |
| 361 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | /* -------------------------------------------------------------------------- |
| 364 | Driver Interface |
| 365 | -------------------------------------------------------------------------- */ |
| 366 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 367 | static int acpi_processor_get_info(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 369 | acpi_status status = 0; |
| 370 | union acpi_object object = { 0 }; |
| 371 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 372 | struct acpi_processor *pr; |
| 373 | int cpu_index, device_declaration = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 374 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 376 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 378 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
| 380 | if (num_online_cpus() > 1) |
| 381 | errata.smp = TRUE; |
| 382 | |
| 383 | acpi_processor_errata(pr); |
| 384 | |
| 385 | /* |
| 386 | * Check to see if we have bus mastering arbitration control. This |
| 387 | * is required for proper C3 usage (to maintain cache coherency). |
| 388 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 389 | 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] | 390 | pr->flags.bm_control = 1; |
| 391 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 392 | "Bus mastering arbitration control present\n")); |
| 393 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 395 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
Bjorn Helgaas | 6cc73b4 | 2009-04-27 16:33:41 -0600 | [diff] [blame] | 397 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
| 398 | /* Declared with "Processor" statement; match ProcessorID */ |
| 399 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 400 | if (ACPI_FAILURE(status)) { |
| 401 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); |
| 402 | return -ENODEV; |
| 403 | } |
| 404 | |
| 405 | /* |
| 406 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
| 407 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in |
| 408 | * arch/xxx/acpi.c |
| 409 | */ |
| 410 | pr->acpi_id = object.processor.proc_id; |
| 411 | } else { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 412 | /* |
| 413 | * Declared with "Device" statement; match _UID. |
| 414 | * Note that we don't handle string _UIDs yet. |
| 415 | */ |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 416 | unsigned long long value; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 417 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
| 418 | NULL, &value); |
| 419 | if (ACPI_FAILURE(status)) { |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 420 | printk(KERN_ERR PREFIX |
| 421 | "Evaluating processor _UID [%#x]\n", status); |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 422 | return -ENODEV; |
| 423 | } |
Myron Stowe | b26e928 | 2008-11-04 14:53:00 -0700 | [diff] [blame] | 424 | device_declaration = 1; |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 425 | pr->acpi_id = value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | } |
Alex Chiang | 2e9d5e4 | 2010-02-22 12:11:19 -0700 | [diff] [blame] | 427 | cpu_index = acpi_get_cpuid(pr->handle, device_declaration, pr->acpi_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 429 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 430 | if (!cpu0_initialized && (cpu_index == -1) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 431 | (num_online_cpus() == 1)) { |
| 432 | cpu_index = 0; |
| 433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 435 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 437 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 439 | /* |
| 440 | * Extra Processor objects may be enumerated on MP systems with |
| 441 | * less than the max # of CPUs. They should be ignored _iff |
| 442 | * they are physically not present. |
| 443 | */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 444 | if (pr->id == -1) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 445 | if (ACPI_FAILURE |
| 446 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 447 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 448 | } |
| 449 | } |
Zhao Yakui | 7a04b84 | 2009-06-24 11:46:44 +0800 | [diff] [blame] | 450 | /* |
| 451 | * On some boxes several processors use the same processor bus id. |
| 452 | * But they are located in different scope. For example: |
| 453 | * \_SB.SCK0.CPU0 |
| 454 | * \_SB.SCK1.CPU0 |
| 455 | * Rename the processor device bus id. And the new bus id will be |
| 456 | * generated as the following format: |
| 457 | * CPU+CPU ID. |
| 458 | */ |
| 459 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 461 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | if (!object.processor.pblk_address) |
| 464 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 465 | else if (object.processor.pblk_length != 6) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 466 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
| 467 | object.processor.pblk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | else { |
| 469 | pr->throttling.address = object.processor.pblk_address; |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 470 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
| 471 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
| 473 | pr->pblk = object.processor.pblk_address; |
| 474 | |
| 475 | /* |
| 476 | * We don't care about error returns - we just try to mark |
| 477 | * these reserved so that nobody else is confused into thinking |
| 478 | * that this region might be unused.. |
| 479 | * |
| 480 | * (In particular, allocating the IO range for Cardbus) |
| 481 | */ |
| 482 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 483 | } |
| 484 | |
Alex Chiang | fe086a7 | 2008-04-29 15:05:29 -0700 | [diff] [blame] | 485 | /* |
| 486 | * If ACPI describes a slot number for this CPU, we can use it |
| 487 | * ensure we get the right value in the "physical id" field |
| 488 | * of /proc/cpuinfo |
| 489 | */ |
| 490 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); |
| 491 | if (ACPI_SUCCESS(status)) |
| 492 | arch_fix_phys_package_id(pr->id, object.integer.value); |
| 493 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 494 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 497 | static DEFINE_PER_CPU(void *, processor_device_array); |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 498 | |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 499 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | { |
Bjorn Helgaas | 7ec0a72 | 2009-03-30 17:48:24 +0000 | [diff] [blame] | 501 | struct acpi_processor *pr = acpi_driver_data(device); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 502 | int saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
| 504 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 505 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | switch (event) { |
| 508 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 509 | saved = pr->performance_platform_limit; |
Zhao Yakui | d81c45e1 | 2009-10-16 09:20:41 +0800 | [diff] [blame] | 510 | acpi_processor_ppc_has_changed(pr, 1); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 511 | if (saved == pr->performance_platform_limit) |
| 512 | break; |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 513 | acpi_bus_generate_proc_event(device, event, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 514 | pr->performance_platform_limit); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 515 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 516 | dev_name(&device->dev), event, |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 517 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | break; |
| 519 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 520 | acpi_processor_cst_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 521 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 522 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 523 | dev_name(&device->dev), event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | break; |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 525 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
| 526 | acpi_processor_tstate_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 527 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 528 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 529 | dev_name(&device->dev), event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | default: |
| 531 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 532 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | break; |
| 534 | } |
| 535 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 536 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 539 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
| 540 | unsigned long action, void *hcpu) |
| 541 | { |
| 542 | unsigned int cpu = (unsigned long)hcpu; |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 543 | struct acpi_processor *pr = per_cpu(processors, cpu); |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 544 | |
| 545 | if (action == CPU_ONLINE && pr) { |
Zhao Yakui | d81c45e1 | 2009-10-16 09:20:41 +0800 | [diff] [blame] | 546 | acpi_processor_ppc_has_changed(pr, 0); |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 547 | acpi_processor_cst_has_changed(pr); |
| 548 | acpi_processor_tstate_has_changed(pr); |
| 549 | } |
| 550 | return NOTIFY_OK; |
| 551 | } |
| 552 | |
| 553 | static struct notifier_block acpi_cpu_notifier = |
| 554 | { |
| 555 | .notifier_call = acpi_cpu_soft_notify, |
| 556 | }; |
| 557 | |
Rakib Mullick | 941b10f | 2009-11-05 16:51:40 -0500 | [diff] [blame] | 558 | static int __cpuinit acpi_processor_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 560 | struct acpi_processor *pr = NULL; |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 561 | int result = 0; |
| 562 | struct sys_device *sysdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 564 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 566 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Yinghai Lu | eaa9584 | 2009-06-06 14:51:36 -0700 | [diff] [blame] | 568 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 569 | kfree(pr); |
| 570 | return -ENOMEM; |
| 571 | } |
| 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | pr->handle = device->handle; |
| 574 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 575 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 576 | device->driver_data = pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | result = acpi_processor_get_info(device); |
| 579 | if (result) { |
| 580 | /* Processor is physically not present */ |
| 581 | return 0; |
| 582 | } |
| 583 | |
Thomas Renninger | 75cbfb9 | 2010-05-26 17:03:33 +0200 | [diff] [blame] | 584 | #ifdef CONFIG_SMP |
| 585 | if (pr->id >= setup_max_cpus && pr->id != 0) |
| 586 | return 0; |
| 587 | #endif |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
| 590 | |
| 591 | /* |
| 592 | * Buggy BIOS check |
| 593 | * ACPI id of processors can be reported wrongly by the BIOS. |
| 594 | * Don't trust it blindly |
| 595 | */ |
| 596 | if (per_cpu(processor_device_array, pr->id) != NULL && |
| 597 | per_cpu(processor_device_array, pr->id) != device) { |
| 598 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
| 599 | "for the processor\n"); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 600 | result = -ENODEV; |
| 601 | goto err_free_cpumask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | } |
| 603 | per_cpu(processor_device_array, pr->id) = device; |
| 604 | |
| 605 | per_cpu(processors, pr->id) = pr; |
| 606 | |
| 607 | result = acpi_processor_add_fs(device); |
| 608 | if (result) |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 609 | goto err_free_cpumask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
| 611 | sysdev = get_cpu_sysdev(pr->id); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 612 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) { |
| 613 | result = -EFAULT; |
| 614 | goto err_remove_fs; |
| 615 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | #ifdef CONFIG_CPU_FREQ |
Zhao Yakui | d81c45e1 | 2009-10-16 09:20:41 +0800 | [diff] [blame] | 618 | acpi_processor_ppc_has_changed(pr, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | #endif |
| 620 | acpi_processor_get_throttling_info(pr); |
| 621 | acpi_processor_get_limit_info(pr); |
| 622 | |
| 623 | |
Len Brown | 541adf7 | 2010-05-22 17:03:29 -0400 | [diff] [blame] | 624 | if (cpuidle_get_driver() == &acpi_idle_driver) |
| 625 | acpi_processor_power_init(pr, device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | pr->cdev = thermal_cooling_device_register("Processor", device, |
| 628 | &processor_cooling_ops); |
| 629 | if (IS_ERR(pr->cdev)) { |
| 630 | result = PTR_ERR(pr->cdev); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 631 | goto err_power_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | } |
| 633 | |
Mike Travis | 13c4115 | 2009-12-14 13:38:30 -0800 | [diff] [blame] | 634 | dev_dbg(&device->dev, "registered as cooling_device%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | pr->cdev->id); |
| 636 | |
| 637 | result = sysfs_create_link(&device->dev.kobj, |
| 638 | &pr->cdev->device.kobj, |
| 639 | "thermal_cooling"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 640 | if (result) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 642 | goto err_thermal_unregister; |
| 643 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | result = sysfs_create_link(&pr->cdev->device.kobj, |
| 645 | &device->dev.kobj, |
| 646 | "device"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 647 | if (result) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 649 | goto err_remove_sysfs; |
| 650 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 652 | return 0; |
Bjorn Helgaas | d4e0526 | 2009-06-22 20:41:09 +0000 | [diff] [blame] | 653 | |
| 654 | err_remove_sysfs: |
| 655 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 656 | err_thermal_unregister: |
| 657 | thermal_cooling_device_unregister(pr->cdev); |
| 658 | err_power_exit: |
| 659 | acpi_processor_power_exit(pr, device); |
| 660 | err_remove_fs: |
| 661 | acpi_processor_remove_fs(device); |
Bjorn Helgaas | 970b049 | 2009-06-22 20:41:19 +0000 | [diff] [blame] | 662 | err_free_cpumask: |
| 663 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | |
| 665 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | } |
| 667 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 668 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 670 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
| 673 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 674 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 676 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 678 | if (pr->id >= nr_cpu_ids) |
| 679 | goto free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
| 681 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 682 | if (acpi_processor_handle_eject(pr)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 683 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | } |
| 685 | |
| 686 | acpi_processor_power_exit(pr, device); |
| 687 | |
Zhang Rui | 9f1eb99 | 2008-04-29 02:36:07 -0400 | [diff] [blame] | 688 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
| 689 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | acpi_processor_remove_fs(device); |
| 691 | |
Zhao Yakui | f28bb45 | 2008-02-15 08:34:37 +0800 | [diff] [blame] | 692 | if (pr->cdev) { |
| 693 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 694 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); |
| 695 | thermal_cooling_device_unregister(pr->cdev); |
| 696 | pr->cdev = NULL; |
| 697 | } |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 698 | |
Mike Travis | 706546d | 2008-06-09 16:22:23 -0700 | [diff] [blame] | 699 | per_cpu(processors, pr->id) = NULL; |
| 700 | per_cpu(processor_device_array, pr->id) = NULL; |
Rusty Russell | 2fdf66b | 2008-12-31 18:08:47 -0800 | [diff] [blame] | 701 | |
| 702 | free: |
| 703 | free_cpumask_var(pr->throttling.shared_cpu_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | kfree(pr); |
| 705 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 706 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
| 708 | |
| 709 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 710 | /**************************************************************************** |
| 711 | * Acpi processor hotplug support * |
| 712 | ****************************************************************************/ |
| 713 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 714 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 716 | acpi_status status; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 717 | unsigned long long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | |
| 720 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 721 | |
| 722 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) |
| 723 | return 1; |
| 724 | |
Zhang Rui | d0ce46f | 2008-02-23 01:53:09 -0500 | [diff] [blame] | 725 | /* |
| 726 | * _STA is mandatory for a processor that supports hot plug |
| 727 | */ |
| 728 | if (status == AE_NOT_FOUND) |
| 729 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 730 | "Processor does not support hot plug\n")); |
| 731 | else |
| 732 | ACPI_EXCEPTION((AE_INFO, status, |
| 733 | "Processor Device is not present")); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 734 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | } |
| 736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 738 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 740 | acpi_handle phandle; |
| 741 | struct acpi_device *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
| 744 | if (acpi_get_parent(handle, &phandle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 745 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | } |
| 747 | |
| 748 | if (acpi_bus_get_device(phandle, &pdev)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 749 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 753 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | } |
| 755 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 756 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } |
| 758 | |
Sam Ravnborg | b95e9e8 | 2008-02-17 13:22:48 +0100 | [diff] [blame] | 759 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
| 760 | u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 762 | struct acpi_processor *pr; |
| 763 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | int result; |
| 765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
| 767 | switch (event) { |
| 768 | case ACPI_NOTIFY_BUS_CHECK: |
| 769 | case ACPI_NOTIFY_DEVICE_CHECK: |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 770 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 771 | "Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 772 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 773 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
| 775 | if (!is_processor_present(handle)) |
| 776 | break; |
| 777 | |
| 778 | if (acpi_bus_get_device(handle, &device)) { |
| 779 | result = acpi_processor_device_add(handle, &device); |
| 780 | if (result) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 781 | printk(KERN_ERR PREFIX |
| 782 | "Unable to add the device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | break; |
| 784 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 785 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 787 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 788 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | |
| 790 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 791 | printk(KERN_ERR PREFIX |
| 792 | "Device don't exist, dropping EJECT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | break; |
| 794 | } |
| 795 | pr = acpi_driver_data(device); |
| 796 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 797 | printk(KERN_ERR PREFIX |
| 798 | "Driver data is NULL, dropping EJECT\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 799 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | break; |
| 802 | default: |
| 803 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 804 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | break; |
| 806 | } |
| 807 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 808 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | static acpi_status |
| 812 | processor_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 813 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 815 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | int *action = context; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 817 | acpi_object_type type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
| 819 | status = acpi_get_type(handle, &type); |
| 820 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 821 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
| 823 | if (type != ACPI_TYPE_PROCESSOR) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 824 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 826 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | case INSTALL_NOTIFY_HANDLER: |
| 828 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 829 | ACPI_SYSTEM_NOTIFY, |
| 830 | acpi_processor_hotplug_notify, |
| 831 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | break; |
| 833 | case UNINSTALL_NOTIFY_HANDLER: |
| 834 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 835 | ACPI_SYSTEM_NOTIFY, |
| 836 | acpi_processor_hotplug_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | break; |
| 838 | default: |
| 839 | break; |
| 840 | } |
| 841 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 842 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 845 | 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] | 846 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | |
| 848 | if (!is_processor_present(handle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 849 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | } |
| 851 | |
| 852 | if (acpi_map_lsapic(handle, p_cpu)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 853 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
| 855 | if (arch_register_cpu(*p_cpu)) { |
| 856 | acpi_unmap_lsapic(*p_cpu); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 857 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | } |
| 859 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 860 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | } |
| 862 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 863 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | { |
Zhang Rui | b62b8ef | 2008-04-29 02:35:56 -0400 | [diff] [blame] | 865 | if (cpu_online(pr->id)) |
| 866 | cpu_down(pr->id); |
| 867 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | arch_unregister_cpu(pr->id); |
| 869 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 870 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 873 | 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] | 874 | { |
| 875 | return AE_ERROR; |
| 876 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 877 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 879 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | } |
| 881 | #endif |
| 882 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | static |
| 884 | void acpi_processor_install_hotplug_notify(void) |
| 885 | { |
| 886 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 887 | int action = INSTALL_NOTIFY_HANDLER; |
| 888 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 889 | ACPI_ROOT_OBJECT, |
| 890 | ACPI_UINT32_MAX, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 891 | processor_walk_namespace_cb, NULL, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 893 | register_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | } |
| 895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | static |
| 897 | void acpi_processor_uninstall_hotplug_notify(void) |
| 898 | { |
| 899 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 900 | int action = UNINSTALL_NOTIFY_HANDLER; |
| 901 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 902 | ACPI_ROOT_OBJECT, |
| 903 | ACPI_UINT32_MAX, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 904 | processor_walk_namespace_cb, NULL, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 906 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | /* |
| 910 | * We keep the driver loaded even when ACPI is not running. |
| 911 | * This is needed for the powernow-k8 driver, that works even without |
| 912 | * ACPI, but needs symbols from this driver |
| 913 | */ |
| 914 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 915 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 917 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 919 | if (acpi_disabled) |
| 920 | return 0; |
| 921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | memset(&errata, 0, sizeof(errata)); |
| 923 | |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 924 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 926 | if (!acpi_processor_dir) |
Akinobu Mita | 83822fc | 2006-12-19 12:56:10 -0800 | [diff] [blame] | 927 | return -ENOMEM; |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 928 | #endif |
Len Brown | 541adf7 | 2010-05-22 17:03:29 -0400 | [diff] [blame] | 929 | |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 930 | if (!cpuidle_register_driver(&acpi_idle_driver)) { |
Len Brown | 541adf7 | 2010-05-22 17:03:29 -0400 | [diff] [blame] | 931 | printk(KERN_DEBUG "ACPI: %s registered with cpuidle\n", |
| 932 | acpi_idle_driver.name); |
Len Brown | 2671717 | 2010-03-08 14:07:30 -0500 | [diff] [blame] | 933 | } else { |
| 934 | printk(KERN_DEBUG "ACPI: acpi_idle yielding to %s", |
| 935 | cpuidle_get_driver()->name); |
| 936 | } |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 937 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | result = acpi_bus_register_driver(&acpi_processor_driver); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 939 | if (result < 0) |
| 940 | goto out_cpuidle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
| 942 | acpi_processor_install_hotplug_notify(); |
| 943 | |
| 944 | acpi_thermal_cpufreq_init(); |
| 945 | |
| 946 | acpi_processor_ppc_init(); |
| 947 | |
Zhao Yakui | 1180509 | 2008-01-28 13:53:42 +0800 | [diff] [blame] | 948 | acpi_processor_throttling_init(); |
| 949 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 950 | return 0; |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 951 | |
| 952 | out_cpuidle: |
| 953 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 954 | |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 955 | #ifdef CONFIG_ACPI_PROCFS |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 956 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 957 | #endif |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 958 | |
| 959 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | } |
| 961 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 962 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | { |
Yinghai Lu | ce8442b | 2009-08-26 14:29:26 -0700 | [diff] [blame] | 964 | if (acpi_disabled) |
| 965 | return; |
| 966 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | acpi_processor_ppc_exit(); |
| 968 | |
| 969 | acpi_thermal_cpufreq_exit(); |
| 970 | |
| 971 | acpi_processor_uninstall_hotplug_notify(); |
| 972 | |
| 973 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 974 | |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 975 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 976 | |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 977 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
Zhao Yakui | 74cad4e | 2009-06-24 11:49:49 +0800 | [diff] [blame] | 979 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 981 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | } |
| 983 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | module_init(acpi_processor_init); |
| 985 | module_exit(acpi_processor_exit); |
| 986 | |
| 987 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); |
| 988 | |
| 989 | MODULE_ALIAS("processor"); |