Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_processor.c - ACPI Processor Driver ($Revision: 71 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> |
| 7 | * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> |
| 8 | * - Added processor hotplug support |
| 9 | * |
| 10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or (at |
| 15 | * your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, but |
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 25 | * |
| 26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 27 | * TBD: |
| 28 | * 1. Make # power states dynamic. |
| 29 | * 2. Support duty_cycle values that span bit 4. |
| 30 | * 3. Optimize by having scheduler determine business instead of |
| 31 | * having us try to calculate it here. |
| 32 | * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/kernel.h> |
| 36 | #include <linux/module.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/types.h> |
| 39 | #include <linux/pci.h> |
| 40 | #include <linux/pm.h> |
| 41 | #include <linux/cpufreq.h> |
| 42 | #include <linux/cpu.h> |
| 43 | #include <linux/proc_fs.h> |
| 44 | #include <linux/seq_file.h> |
| 45 | #include <linux/dmi.h> |
| 46 | #include <linux/moduleparam.h> |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 47 | #include <linux/cpuidle.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | #include <asm/io.h> |
| 50 | #include <asm/system.h> |
| 51 | #include <asm/cpu.h> |
| 52 | #include <asm/delay.h> |
| 53 | #include <asm/uaccess.h> |
| 54 | #include <asm/processor.h> |
| 55 | #include <asm/smp.h> |
| 56 | #include <asm/acpi.h> |
| 57 | |
| 58 | #include <acpi/acpi_bus.h> |
| 59 | #include <acpi/acpi_drivers.h> |
| 60 | #include <acpi/processor.h> |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
| 63 | #define ACPI_PROCESSOR_CLASS "processor" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
| 65 | #define ACPI_PROCESSOR_FILE_INFO "info" |
| 66 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" |
| 67 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" |
| 68 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 |
| 69 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 70 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | #define ACPI_PROCESSOR_LIMIT_USER 0 |
| 73 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 76 | ACPI_MODULE_NAME("processor_core"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 78 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Len Brown | 7cda93e | 2007-02-12 23:50:02 -0500 | [diff] [blame] | 79 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | MODULE_LICENSE("GPL"); |
| 81 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 82 | static int acpi_processor_add(struct acpi_device *device); |
| 83 | static int acpi_processor_start(struct acpi_device *device); |
| 84 | static int acpi_processor_remove(struct acpi_device *device, int type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
| 88 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 89 | extern int acpi_processor_tstate_has_changed(struct acpi_processor *pr); |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 92 | static const struct acpi_device_id processor_device_ids[] = { |
| 93 | {ACPI_PROCESSOR_HID, 0}, |
| 94 | {"", 0}, |
| 95 | }; |
| 96 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); |
| 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | static struct acpi_driver acpi_processor_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 99 | .name = "processor", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | .class = ACPI_PROCESSOR_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 101 | .ids = processor_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 102 | .ops = { |
| 103 | .add = acpi_processor_add, |
| 104 | .remove = acpi_processor_remove, |
| 105 | .start = acpi_processor_start, |
Thomas Gleixner | b04e7bd | 2007-09-22 22:29:05 +0000 | [diff] [blame] | 106 | .suspend = acpi_processor_suspend, |
| 107 | .resume = acpi_processor_resume, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 108 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | }; |
| 110 | |
| 111 | #define INSTALL_NOTIFY_HANDLER 1 |
| 112 | #define UNINSTALL_NOTIFY_HANDLER 2 |
| 113 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 114 | static const struct file_operations acpi_processor_info_fops = { |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 115 | .owner = THIS_MODULE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 116 | .open = acpi_processor_info_open_fs, |
| 117 | .read = seq_read, |
| 118 | .llseek = seq_lseek, |
| 119 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | }; |
| 121 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 122 | struct acpi_processor *processors[NR_CPUS]; |
Andreas Mohr | 9f22271 | 2006-06-23 02:04:27 -0700 | [diff] [blame] | 123 | struct acpi_processor_errata errata __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | /* -------------------------------------------------------------------------- |
| 126 | Errata Handling |
| 127 | -------------------------------------------------------------------------- */ |
| 128 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 129 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 131 | u8 value1 = 0; |
| 132 | u8 value2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
| 135 | if (!dev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 136 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | /* |
| 139 | * Note that 'dev' references the PIIX4 ACPI Controller. |
| 140 | */ |
| 141 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 142 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | case 0: |
| 144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); |
| 145 | break; |
| 146 | case 1: |
| 147 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); |
| 148 | break; |
| 149 | case 2: |
| 150 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); |
| 151 | break; |
| 152 | case 3: |
| 153 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); |
| 154 | break; |
| 155 | default: |
| 156 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); |
| 157 | break; |
| 158 | } |
| 159 | |
Auke Kok | 44c1013 | 2007-06-08 15:46:36 -0700 | [diff] [blame] | 160 | switch (dev->revision) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
| 162 | case 0: /* PIIX4 A-step */ |
| 163 | case 1: /* PIIX4 B-step */ |
| 164 | /* |
| 165 | * See specification changes #13 ("Manual Throttle Duty Cycle") |
| 166 | * and #14 ("Enabling and Disabling Manual Throttle"), plus |
| 167 | * erratum #5 ("STPCLK# Deassertion Time") from the January |
| 168 | * 2002 PIIX4 specification update. Applies to only older |
| 169 | * PIIX4 models. |
| 170 | */ |
| 171 | errata.piix4.throttle = 1; |
| 172 | |
| 173 | case 2: /* PIIX4E */ |
| 174 | case 3: /* PIIX4M */ |
| 175 | /* |
| 176 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA |
| 177 | * Livelock") from the January 2002 PIIX4 specification update. |
| 178 | * Applies to all PIIX4 models. |
| 179 | */ |
| 180 | |
| 181 | /* |
| 182 | * BM-IDE |
| 183 | * ------ |
| 184 | * Find the PIIX4 IDE Controller and get the Bus Master IDE |
| 185 | * Status register address. We'll use this later to read |
| 186 | * each IDE controller's DMA status to make sure we catch all |
| 187 | * DMA activity. |
| 188 | */ |
| 189 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 190 | PCI_DEVICE_ID_INTEL_82371AB, |
| 191 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | if (dev) { |
| 193 | errata.piix4.bmisx = pci_resource_start(dev, 4); |
| 194 | pci_dev_put(dev); |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * Type-F DMA |
| 199 | * ---------- |
| 200 | * Find the PIIX4 ISA Controller and read the Motherboard |
| 201 | * DMA controller's status to see if Type-F (Fast) DMA mode |
| 202 | * is enabled (bit 7) on either channel. Note that we'll |
| 203 | * disable C3 support if this is enabled, as some legacy |
| 204 | * devices won't operate well if fast DMA is disabled. |
| 205 | */ |
| 206 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 207 | PCI_DEVICE_ID_INTEL_82371AB_0, |
| 208 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | if (dev) { |
| 210 | pci_read_config_byte(dev, 0x76, &value1); |
| 211 | pci_read_config_byte(dev, 0x77, &value2); |
| 212 | if ((value1 & 0x80) || (value2 & 0x80)) |
| 213 | errata.piix4.fdma = 1; |
| 214 | pci_dev_put(dev); |
| 215 | } |
| 216 | |
| 217 | break; |
| 218 | } |
| 219 | |
| 220 | if (errata.piix4.bmisx) |
| 221 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 222 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (errata.piix4.fdma) |
| 224 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 225 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 227 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 230 | static int acpi_processor_errata(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 232 | int result = 0; |
| 233 | struct pci_dev *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
| 236 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 237 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | /* |
| 240 | * PIIX4 |
| 241 | */ |
| 242 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 243 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
| 244 | PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | if (dev) { |
| 246 | result = acpi_processor_errata_piix4(dev); |
| 247 | pci_dev_put(dev); |
| 248 | } |
| 249 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 250 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* -------------------------------------------------------------------------- |
Akinobu Mita | 0b28002 | 2006-03-26 01:38:58 -0800 | [diff] [blame] | 254 | Common ACPI processor functions |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 255 | -------------------------------------------------------------------------- */ |
| 256 | |
| 257 | /* |
| 258 | * _PDC is required for a BIOS-OS handshake for most of the newer |
| 259 | * ACPI processor features. |
| 260 | */ |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 261 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 262 | { |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 263 | struct acpi_object_list *pdc_in = pr->pdc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 264 | acpi_status status = AE_OK; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 265 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 266 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 267 | if (!pdc_in) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 268 | return status; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 269 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 270 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 271 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 272 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 273 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 274 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 275 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 276 | return status; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 277 | } |
| 278 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 279 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | FS Interface (/proc) |
| 281 | -------------------------------------------------------------------------- */ |
| 282 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 283 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) |
| 286 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 287 | struct acpi_processor *pr = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | if (!pr) |
| 291 | goto end; |
| 292 | |
| 293 | seq_printf(seq, "processor id: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | "acpi id: %d\n" |
| 295 | "bus mastering control: %s\n" |
| 296 | "power management: %s\n" |
| 297 | "throttling control: %s\n" |
| 298 | "limit interface: %s\n", |
| 299 | pr->id, |
| 300 | pr->acpi_id, |
| 301 | pr->flags.bm_control ? "yes" : "no", |
| 302 | pr->flags.power ? "yes" : "no", |
| 303 | pr->flags.throttling ? "yes" : "no", |
| 304 | pr->flags.limit ? "yes" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 306 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 307 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) |
| 311 | { |
| 312 | return single_open(file, acpi_processor_info_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 313 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | } |
| 315 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 316 | static int acpi_processor_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 318 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
| 321 | if (!acpi_device_dir(device)) { |
| 322 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 323 | acpi_processor_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 325 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | acpi_device_dir(device)->owner = THIS_MODULE; |
| 328 | |
| 329 | /* 'info' [R] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 330 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
| 331 | S_IRUGO, acpi_device_dir(device), |
| 332 | &acpi_processor_info_fops, |
| 333 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 335 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | /* 'throttling' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 338 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
| 339 | S_IFREG | S_IRUGO | S_IWUSR, |
| 340 | acpi_device_dir(device), |
| 341 | &acpi_processor_throttling_fops, |
| 342 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 344 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
| 346 | /* 'limit' [R/W] */ |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 347 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
| 348 | S_IFREG | S_IRUGO | S_IWUSR, |
| 349 | acpi_device_dir(device), |
| 350 | &acpi_processor_limit_fops, |
| 351 | acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 353 | return -EIO; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 354 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | } |
| 356 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 357 | static int acpi_processor_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 361 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
| 362 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 364 | acpi_device_dir(device)); |
| 365 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
| 366 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
| 368 | acpi_device_dir(device) = NULL; |
| 369 | } |
| 370 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 371 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | } |
| 373 | |
| 374 | /* Use the acpiid in MADT to map cpus in case of SMP */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | #ifndef CONFIG_SMP |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 377 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | #else |
| 379 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 380 | static struct acpi_table_madt *madt; |
| 381 | |
| 382 | static int map_lapic_id(struct acpi_subtable_header *entry, |
| 383 | u32 acpi_id, int *apic_id) |
| 384 | { |
| 385 | struct acpi_madt_local_apic *lapic = |
| 386 | (struct acpi_madt_local_apic *)entry; |
| 387 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && |
| 388 | lapic->processor_id == acpi_id) { |
| 389 | *apic_id = lapic->id; |
| 390 | return 1; |
| 391 | } |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
| 396 | u32 acpi_id, int *apic_id) |
| 397 | { |
| 398 | struct acpi_madt_local_sapic *lsapic = |
| 399 | (struct acpi_madt_local_sapic *)entry; |
| 400 | /* Only check enabled APICs*/ |
| 401 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { |
| 402 | /* First check against id */ |
| 403 | if (lsapic->processor_id == acpi_id) { |
Alexey Starikovskiy | 615d5f2 | 2007-02-12 10:51:23 -0500 | [diff] [blame] | 404 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 405 | return 1; |
| 406 | /* Check against optional uid */ |
| 407 | } else if (entry->length >= 16 && |
| 408 | lsapic->uid == acpi_id) { |
| 409 | *apic_id = lsapic->uid; |
| 410 | return 1; |
| 411 | } |
| 412 | } |
| 413 | return 0; |
| 414 | } |
| 415 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 416 | static int map_madt_entry(u32 acpi_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | { |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 418 | unsigned long madt_end, entry; |
| 419 | int apic_id = -1; |
| 420 | |
| 421 | if (!madt) |
| 422 | return apic_id; |
| 423 | |
| 424 | entry = (unsigned long)madt; |
| 425 | madt_end = entry + madt->header.length; |
| 426 | |
| 427 | /* Parse all entries looking for a match. */ |
| 428 | |
| 429 | entry += sizeof(struct acpi_table_madt); |
| 430 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { |
| 431 | struct acpi_subtable_header *header = |
| 432 | (struct acpi_subtable_header *)entry; |
| 433 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 434 | if (map_lapic_id(header, acpi_id, &apic_id)) |
| 435 | break; |
| 436 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
| 437 | if (map_lsapic_id(header, acpi_id, &apic_id)) |
| 438 | break; |
| 439 | } |
| 440 | entry += header->length; |
| 441 | } |
| 442 | return apic_id; |
| 443 | } |
| 444 | |
| 445 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) |
| 446 | { |
| 447 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 448 | union acpi_object *obj; |
| 449 | struct acpi_subtable_header *header; |
| 450 | int apic_id = -1; |
| 451 | |
| 452 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) |
| 453 | goto exit; |
| 454 | |
| 455 | if (!buffer.length || !buffer.pointer) |
| 456 | goto exit; |
| 457 | |
| 458 | obj = buffer.pointer; |
| 459 | if (obj->type != ACPI_TYPE_BUFFER || |
| 460 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { |
| 461 | goto exit; |
| 462 | } |
| 463 | |
| 464 | header = (struct acpi_subtable_header *)obj->buffer.pointer; |
| 465 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { |
| 466 | map_lapic_id(header, acpi_id, &apic_id); |
| 467 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
| 468 | map_lsapic_id(header, acpi_id, &apic_id); |
| 469 | } |
| 470 | |
| 471 | exit: |
| 472 | if (buffer.pointer) |
| 473 | kfree(buffer.pointer); |
| 474 | return apic_id; |
| 475 | } |
| 476 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 477 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 478 | { |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 479 | int i; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 480 | int apic_id = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 482 | apic_id = map_mat_entry(handle, acpi_id); |
| 483 | if (apic_id == -1) |
| 484 | apic_id = map_madt_entry(acpi_id); |
| 485 | if (apic_id == -1) |
| 486 | return apic_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 488 | for_each_possible_cpu(i) { |
Mike Travis | 71b3123 | 2007-10-19 20:35:03 +0200 | [diff] [blame] | 489 | if (cpu_physical_id(i) == apic_id) |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 490 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | return -1; |
| 493 | } |
| 494 | #endif |
| 495 | |
| 496 | /* -------------------------------------------------------------------------- |
| 497 | Driver Interface |
| 498 | -------------------------------------------------------------------------- */ |
| 499 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 500 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 502 | acpi_status status = 0; |
| 503 | union acpi_object object = { 0 }; |
| 504 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 505 | int cpu_index; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 506 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 510 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
| 512 | if (num_online_cpus() > 1) |
| 513 | errata.smp = TRUE; |
| 514 | |
| 515 | acpi_processor_errata(pr); |
| 516 | |
| 517 | /* |
| 518 | * Check to see if we have bus mastering arbitration control. This |
| 519 | * is required for proper C3 usage (to maintain cache coherency). |
| 520 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 521 | 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] | 522 | pr->flags.bm_control = 1; |
| 523 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 524 | "Bus mastering arbitration control present\n")); |
| 525 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 527 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 529 | /* Check if it is a Device with HID and UID */ |
| 530 | if (has_uid) { |
| 531 | unsigned long value; |
| 532 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
| 533 | NULL, &value); |
| 534 | if (ACPI_FAILURE(status)) { |
| 535 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); |
| 536 | return -ENODEV; |
| 537 | } |
| 538 | pr->acpi_id = value; |
| 539 | } else { |
| 540 | /* |
| 541 | * Evalute the processor object. Note that it is common on SMP to |
| 542 | * have the first (boot) processor with a valid PBLK address while |
| 543 | * all others have a NULL address. |
| 544 | */ |
| 545 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 546 | if (ACPI_FAILURE(status)) { |
| 547 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); |
| 548 | return -ENODEV; |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
| 553 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c |
| 554 | */ |
| 555 | pr->acpi_id = object.processor.proc_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | } |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 557 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 559 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
Ashok Raj | df42baa | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 560 | if (!cpu0_initialized && (cpu_index == -1) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 561 | (num_online_cpus() == 1)) { |
| 562 | cpu_index = 0; |
| 563 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 565 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 567 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 569 | /* |
| 570 | * Extra Processor objects may be enumerated on MP systems with |
| 571 | * less than the max # of CPUs. They should be ignored _iff |
| 572 | * they are physically not present. |
| 573 | */ |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 574 | if (pr->id == -1) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 575 | if (ACPI_FAILURE |
| 576 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 577 | return -ENODEV; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 578 | } |
| 579 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
| 581 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 582 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
| 584 | if (!object.processor.pblk_address) |
| 585 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 586 | else if (object.processor.pblk_length != 6) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 587 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
| 588 | object.processor.pblk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | else { |
| 590 | pr->throttling.address = object.processor.pblk_address; |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 591 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
| 592 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
| 594 | pr->pblk = object.processor.pblk_address; |
| 595 | |
| 596 | /* |
| 597 | * We don't care about error returns - we just try to mark |
| 598 | * these reserved so that nobody else is confused into thinking |
| 599 | * that this region might be unused.. |
| 600 | * |
| 601 | * (In particular, allocating the IO range for Cardbus) |
| 602 | */ |
| 603 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 604 | } |
| 605 | |
Alex Chiang | fe086a7 | 2008-04-29 15:05:29 -0700 | [diff] [blame] | 606 | /* |
| 607 | * If ACPI describes a slot number for this CPU, we can use it |
| 608 | * ensure we get the right value in the "physical id" field |
| 609 | * of /proc/cpuinfo |
| 610 | */ |
| 611 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); |
| 612 | if (ACPI_SUCCESS(status)) |
| 613 | arch_fix_phys_package_id(pr->id, object.integer.value); |
| 614 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 615 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | } |
| 617 | |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 618 | static void *processor_device_array[NR_CPUS]; |
| 619 | |
Pierre Ossman | 7af8b66 | 2006-10-10 14:20:31 -0700 | [diff] [blame] | 620 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 622 | int result = 0; |
| 623 | acpi_status status = AE_OK; |
| 624 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | pr = acpi_driver_data(device); |
| 628 | |
Alexey Starikovskiy | 11bf04c | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 629 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | if (result) { |
| 631 | /* Processor is physically not present */ |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 632 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | } |
| 634 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 635 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 637 | /* |
| 638 | * Buggy BIOS check |
| 639 | * ACPI id of processors can be reported wrongly by the BIOS. |
| 640 | * Don't trust it blindly |
| 641 | */ |
| 642 | if (processor_device_array[pr->id] != NULL && |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 643 | processor_device_array[pr->id] != device) { |
Joe Perches | 4fdb2a0 | 2007-11-19 17:48:02 -0800 | [diff] [blame] | 644 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
Len Brown | 0eacee5 | 2006-03-31 00:37:23 -0500 | [diff] [blame] | 645 | "for the processor\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 646 | return -ENODEV; |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 647 | } |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 648 | processor_device_array[pr->id] = device; |
Venkatesh Pallipadi | cd8e2b4 | 2005-10-21 19:22:00 -0400 | [diff] [blame] | 649 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | processors[pr->id] = pr; |
| 651 | |
| 652 | result = acpi_processor_add_fs(device); |
| 653 | if (result) |
| 654 | goto end; |
| 655 | |
| 656 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 657 | acpi_processor_notify, pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 659 | /* _PDC call should be done before doing anything else (if reqd.). */ |
| 660 | arch_acpi_processor_init_pdc(pr); |
| 661 | acpi_processor_set_pdc(pr); |
Zhao Yakui | 0ac3c57 | 2007-11-15 17:05:46 +0800 | [diff] [blame] | 662 | #ifdef CONFIG_CPU_FREQ |
| 663 | acpi_processor_ppc_has_changed(pr); |
| 664 | #endif |
| 665 | acpi_processor_get_throttling_info(pr); |
| 666 | acpi_processor_get_limit_info(pr); |
| 667 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame] | 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | acpi_processor_power_init(pr, device); |
| 670 | |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 671 | pr->cdev = thermal_cooling_device_register("Processor", device, |
| 672 | &processor_cooling_ops); |
Thomas Sujith | d76628c | 2008-02-15 18:26:54 -0500 | [diff] [blame] | 673 | if (IS_ERR(pr->cdev)) { |
| 674 | result = PTR_ERR(pr->cdev); |
| 675 | goto end; |
| 676 | } |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 677 | |
Julia Lawall | 9030062 | 2008-04-11 10:09:24 +0800 | [diff] [blame] | 678 | printk(KERN_INFO PREFIX |
| 679 | "%s is registered as cooling_device%d\n", |
| 680 | device->dev.bus_id, pr->cdev->id); |
| 681 | |
| 682 | result = sysfs_create_link(&device->dev.kobj, |
| 683 | &pr->cdev->device.kobj, |
| 684 | "thermal_cooling"); |
| 685 | if (result) |
| 686 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
| 687 | result = sysfs_create_link(&pr->cdev->device.kobj, |
| 688 | &device->dev.kobj, |
| 689 | "device"); |
| 690 | if (result) |
| 691 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 692 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | if (pr->flags.throttling) { |
| 694 | printk(KERN_INFO PREFIX "%s [%s] (supports", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 695 | acpi_device_name(device), acpi_device_bid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | printk(" %d throttling states", pr->throttling.state_count); |
| 697 | printk(")\n"); |
| 698 | } |
| 699 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 700 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 702 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | } |
| 704 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 705 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | { |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 707 | struct acpi_processor *pr = data; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 708 | struct acpi_device *device = NULL; |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 709 | int saved; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | |
| 711 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 712 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | |
| 714 | if (acpi_bus_get_device(pr->handle, &device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 715 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | switch (event) { |
| 718 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 719 | saved = pr->performance_platform_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | acpi_processor_ppc_has_changed(pr); |
Alexey Starikovskiy | e790cc8 | 2007-11-21 03:23:32 +0300 | [diff] [blame] | 721 | if (saved == pr->performance_platform_limit) |
| 722 | break; |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 723 | acpi_bus_generate_proc_event(device, event, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 724 | pr->performance_platform_limit); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 725 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 726 | device->dev.bus_id, event, |
| 727 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | break; |
| 729 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 730 | acpi_processor_cst_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 731 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 732 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 733 | device->dev.bus_id, event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | break; |
Luming Yu | 01854e6 | 2007-05-26 22:49:58 +0800 | [diff] [blame] | 735 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
| 736 | acpi_processor_tstate_has_changed(pr); |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 737 | acpi_bus_generate_proc_event(device, event, 0); |
Zhang Rui | 962ce8c | 2007-08-23 01:24:31 +0800 | [diff] [blame] | 738 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
| 739 | device->dev.bus_id, event, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | default: |
| 741 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 742 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | break; |
| 744 | } |
| 745 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 746 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | } |
| 748 | |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 749 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
| 750 | unsigned long action, void *hcpu) |
| 751 | { |
| 752 | unsigned int cpu = (unsigned long)hcpu; |
| 753 | struct acpi_processor *pr = processors[cpu]; |
| 754 | |
| 755 | if (action == CPU_ONLINE && pr) { |
| 756 | acpi_processor_ppc_has_changed(pr); |
| 757 | acpi_processor_cst_has_changed(pr); |
| 758 | acpi_processor_tstate_has_changed(pr); |
| 759 | } |
| 760 | return NOTIFY_OK; |
| 761 | } |
| 762 | |
| 763 | static struct notifier_block acpi_cpu_notifier = |
| 764 | { |
| 765 | .notifier_call = acpi_cpu_soft_notify, |
| 766 | }; |
| 767 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 768 | static int acpi_processor_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 770 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 774 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 776 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 778 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | |
| 780 | pr->handle = device->handle; |
| 781 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 782 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
| 783 | acpi_driver_data(device) = pr; |
| 784 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 785 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | } |
| 787 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 788 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 790 | acpi_status status = AE_OK; |
| 791 | struct acpi_processor *pr = NULL; |
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 | |
| 794 | if (!device || !acpi_driver_data(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 795 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 797 | pr = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 799 | if (pr->id >= nr_cpu_ids) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | kfree(pr); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 801 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
| 803 | |
| 804 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 805 | if (acpi_processor_handle_eject(pr)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 806 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
| 808 | |
| 809 | acpi_processor_power_exit(pr, device); |
| 810 | |
| 811 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 812 | acpi_processor_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
| 814 | acpi_processor_remove_fs(device); |
| 815 | |
Zhao Yakui | f28bb45 | 2008-02-15 08:34:37 +0800 | [diff] [blame] | 816 | if (pr->cdev) { |
| 817 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); |
| 818 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); |
| 819 | thermal_cooling_device_unregister(pr->cdev); |
| 820 | pr->cdev = NULL; |
| 821 | } |
Zhang Rui | d9460fd22 | 2008-01-17 15:51:23 +0800 | [diff] [blame] | 822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | processors[pr->id] = NULL; |
Alok Kataria | ba62b07 | 2008-04-08 17:41:56 -0700 | [diff] [blame] | 824 | processor_device_array[pr->id] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | kfree(pr); |
| 826 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 827 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 831 | /**************************************************************************** |
| 832 | * Acpi processor hotplug support * |
| 833 | ****************************************************************************/ |
| 834 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 835 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 837 | acpi_status status; |
| 838 | unsigned long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
| 841 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 842 | |
| 843 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) |
| 844 | return 1; |
| 845 | |
Zhang Rui | d0ce46f | 2008-02-23 01:53:09 -0500 | [diff] [blame] | 846 | /* |
| 847 | * _STA is mandatory for a processor that supports hot plug |
| 848 | */ |
| 849 | if (status == AE_NOT_FOUND) |
| 850 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 851 | "Processor does not support hot plug\n")); |
| 852 | else |
| 853 | ACPI_EXCEPTION((AE_INFO, status, |
| 854 | "Processor Device is not present")); |
Zhang Rui | cfaf374 | 2008-01-09 02:17:47 -0500 | [diff] [blame] | 855 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | } |
| 857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 859 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 861 | acpi_handle phandle; |
| 862 | struct acpi_device *pdev; |
| 863 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
| 866 | if (acpi_get_parent(handle, &phandle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 867 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | if (acpi_bus_get_device(phandle, &pdev)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 871 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 875 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | } |
| 877 | |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 878 | acpi_bus_start(*device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
| 880 | pr = acpi_driver_data(*device); |
| 881 | if (!pr) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 882 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 884 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 885 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | } |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 887 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
| 889 | |
Sam Ravnborg | b95e9e8 | 2008-02-17 13:22:48 +0100 | [diff] [blame] | 890 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
| 891 | u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 893 | struct acpi_processor *pr; |
| 894 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | int result; |
| 896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | switch (event) { |
| 899 | case ACPI_NOTIFY_BUS_CHECK: |
| 900 | case ACPI_NOTIFY_DEVICE_CHECK: |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 901 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 902 | "Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 903 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
Glauber Costa | d6f882e | 2008-03-04 15:06:36 -0800 | [diff] [blame] | 904 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
| 906 | if (!is_processor_present(handle)) |
| 907 | break; |
| 908 | |
| 909 | if (acpi_bus_get_device(handle, &device)) { |
| 910 | result = acpi_processor_device_add(handle, &device); |
| 911 | if (result) |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 912 | printk(KERN_ERR PREFIX |
| 913 | "Unable to add the device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | break; |
| 915 | } |
| 916 | |
| 917 | pr = acpi_driver_data(device); |
| 918 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 919 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | break; |
| 921 | } |
| 922 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 923 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 924 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | break; |
| 926 | } |
| 927 | |
| 928 | result = acpi_processor_start(device); |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 929 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 930 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | } else { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 932 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
| 933 | acpi_device_bid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 935 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 937 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 938 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
| 940 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 941 | printk(KERN_ERR PREFIX |
| 942 | "Device don't exist, dropping EJECT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | break; |
| 944 | } |
| 945 | pr = acpi_driver_data(device); |
| 946 | if (!pr) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 947 | printk(KERN_ERR PREFIX |
| 948 | "Driver data is NULL, dropping EJECT\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 949 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | } |
| 951 | |
Christoph Lameter | fbb43ab | 2007-11-28 16:22:08 -0800 | [diff] [blame] | 952 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 953 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | break; |
| 955 | default: |
| 956 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 957 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | break; |
| 959 | } |
| 960 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 961 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | } |
| 963 | |
| 964 | static acpi_status |
| 965 | processor_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 966 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 968 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | int *action = context; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 970 | acpi_object_type type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
| 972 | status = acpi_get_type(handle, &type); |
| 973 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 974 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
| 976 | if (type != ACPI_TYPE_PROCESSOR) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 977 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 979 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | case INSTALL_NOTIFY_HANDLER: |
| 981 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 982 | ACPI_SYSTEM_NOTIFY, |
| 983 | acpi_processor_hotplug_notify, |
| 984 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | break; |
| 986 | case UNINSTALL_NOTIFY_HANDLER: |
| 987 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 988 | ACPI_SYSTEM_NOTIFY, |
| 989 | acpi_processor_hotplug_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | break; |
| 991 | default: |
| 992 | break; |
| 993 | } |
| 994 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 995 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | } |
| 997 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 998 | 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] | 999 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
| 1001 | if (!is_processor_present(handle)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1002 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | } |
| 1004 | |
| 1005 | if (acpi_map_lsapic(handle, p_cpu)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1006 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
| 1008 | if (arch_register_cpu(*p_cpu)) { |
| 1009 | acpi_unmap_lsapic(*p_cpu); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1010 | return AE_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | } |
| 1012 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1013 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | } |
| 1015 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1016 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | { |
| 1018 | if (cpu_online(pr->id)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1019 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | arch_unregister_cpu(pr->id); |
| 1022 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1023 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | } |
| 1025 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1026 | 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] | 1027 | { |
| 1028 | return AE_ERROR; |
| 1029 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1030 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1032 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | } |
| 1034 | #endif |
| 1035 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | static |
| 1037 | void acpi_processor_install_hotplug_notify(void) |
| 1038 | { |
| 1039 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1040 | int action = INSTALL_NOTIFY_HANDLER; |
| 1041 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1042 | ACPI_ROOT_OBJECT, |
| 1043 | ACPI_UINT32_MAX, |
| 1044 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1046 | register_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | } |
| 1048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | static |
| 1050 | void acpi_processor_uninstall_hotplug_notify(void) |
| 1051 | { |
| 1052 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 1053 | int action = UNINSTALL_NOTIFY_HANDLER; |
| 1054 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1055 | ACPI_ROOT_OBJECT, |
| 1056 | ACPI_UINT32_MAX, |
| 1057 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | #endif |
Venkatesh Pallipadi | 729c6ba | 2007-09-16 15:36:43 +0200 | [diff] [blame] | 1059 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | } |
| 1061 | |
| 1062 | /* |
| 1063 | * We keep the driver loaded even when ACPI is not running. |
| 1064 | * This is needed for the powernow-k8 driver, that works even without |
| 1065 | * ACPI, but needs symbols from this driver |
| 1066 | */ |
| 1067 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1068 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1070 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | |
| 1073 | memset(&processors, 0, sizeof(processors)); |
| 1074 | memset(&errata, 0, sizeof(errata)); |
| 1075 | |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1076 | #ifdef CONFIG_SMP |
| 1077 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, |
| 1078 | (struct acpi_table_header **)&madt))) |
Randy Dunlap | 70c0846 | 2007-02-13 16:11:36 -0800 | [diff] [blame] | 1079 | madt = NULL; |
Alexey Starikovskiy | f18c5a0 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 1080 | #endif |
| 1081 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1083 | if (!acpi_processor_dir) |
Akinobu Mita | 83822fc | 2006-12-19 12:56:10 -0800 | [diff] [blame] | 1084 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | acpi_processor_dir->owner = THIS_MODULE; |
| 1086 | |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1087 | result = cpuidle_register_driver(&acpi_idle_driver); |
| 1088 | if (result < 0) |
| 1089 | goto out_proc; |
| 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | result = acpi_bus_register_driver(&acpi_processor_driver); |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1092 | if (result < 0) |
| 1093 | goto out_cpuidle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | acpi_processor_install_hotplug_notify(); |
| 1096 | |
| 1097 | acpi_thermal_cpufreq_init(); |
| 1098 | |
| 1099 | acpi_processor_ppc_init(); |
| 1100 | |
Zhao Yakui | 1180509 | 2008-01-28 13:53:42 +0800 | [diff] [blame] | 1101 | acpi_processor_throttling_init(); |
| 1102 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1103 | return 0; |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1104 | |
| 1105 | out_cpuidle: |
| 1106 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1107 | |
| 1108 | out_proc: |
| 1109 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1110 | |
| 1111 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | } |
| 1113 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1114 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | acpi_processor_ppc_exit(); |
| 1117 | |
| 1118 | acpi_thermal_cpufreq_exit(); |
| 1119 | |
| 1120 | acpi_processor_uninstall_hotplug_notify(); |
| 1121 | |
| 1122 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 1123 | |
Len Brown | 4f86d3a | 2007-10-03 18:58:00 -0400 | [diff] [blame] | 1124 | cpuidle_unregister_driver(&acpi_idle_driver); |
| 1125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 1127 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1128 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | } |
| 1130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | module_init(acpi_processor_init); |
| 1132 | module_exit(acpi_processor_exit); |
| 1133 | |
| 1134 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); |
| 1135 | |
| 1136 | MODULE_ALIAS("processor"); |