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> |
| 47 | |
| 48 | #include <asm/io.h> |
| 49 | #include <asm/system.h> |
| 50 | #include <asm/cpu.h> |
| 51 | #include <asm/delay.h> |
| 52 | #include <asm/uaccess.h> |
| 53 | #include <asm/processor.h> |
| 54 | #include <asm/smp.h> |
| 55 | #include <asm/acpi.h> |
| 56 | |
| 57 | #include <acpi/acpi_bus.h> |
| 58 | #include <acpi/acpi_drivers.h> |
| 59 | #include <acpi/processor.h> |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
| 62 | #define ACPI_PROCESSOR_CLASS "processor" |
| 63 | #define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver" |
| 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 |
| 70 | |
| 71 | #define ACPI_PROCESSOR_LIMIT_USER 0 |
| 72 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 |
| 73 | |
| 74 | #define ACPI_STA_PRESENT 0x00000001 |
| 75 | |
| 76 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 77 | ACPI_MODULE_NAME("acpi_processor") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | MODULE_DESCRIPTION(ACPI_PROCESSOR_DRIVER_NAME); |
| 81 | MODULE_LICENSE("GPL"); |
| 82 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 83 | static int acpi_processor_add(struct acpi_device *device); |
| 84 | static int acpi_processor_start(struct acpi_device *device); |
| 85 | static int acpi_processor_remove(struct acpi_device *device, int type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 87 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
| 89 | static int acpi_processor_handle_eject(struct acpi_processor *pr); |
| 90 | |
| 91 | static struct acpi_driver acpi_processor_driver = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | .name = ACPI_PROCESSOR_DRIVER_NAME, |
| 93 | .class = ACPI_PROCESSOR_CLASS, |
| 94 | .ids = ACPI_PROCESSOR_HID, |
| 95 | .ops = { |
| 96 | .add = acpi_processor_add, |
| 97 | .remove = acpi_processor_remove, |
| 98 | .start = acpi_processor_start, |
| 99 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | }; |
| 101 | |
| 102 | #define INSTALL_NOTIFY_HANDLER 1 |
| 103 | #define UNINSTALL_NOTIFY_HANDLER 2 |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | static struct file_operations acpi_processor_info_fops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 106 | .open = acpi_processor_info_open_fs, |
| 107 | .read = seq_read, |
| 108 | .llseek = seq_lseek, |
| 109 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | }; |
| 111 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 112 | struct acpi_processor *processors[NR_CPUS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | struct acpi_processor_errata errata; |
| 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | /* -------------------------------------------------------------------------- |
| 116 | Errata Handling |
| 117 | -------------------------------------------------------------------------- */ |
| 118 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 119 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 121 | u8 rev = 0; |
| 122 | u8 value1 = 0; |
| 123 | u8 value2 = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | ACPI_FUNCTION_TRACE("acpi_processor_errata_piix4"); |
| 126 | |
| 127 | if (!dev) |
| 128 | return_VALUE(-EINVAL); |
| 129 | |
| 130 | /* |
| 131 | * Note that 'dev' references the PIIX4 ACPI Controller. |
| 132 | */ |
| 133 | |
| 134 | pci_read_config_byte(dev, PCI_REVISION_ID, &rev); |
| 135 | |
| 136 | switch (rev) { |
| 137 | case 0: |
| 138 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); |
| 139 | break; |
| 140 | case 1: |
| 141 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); |
| 142 | break; |
| 143 | case 2: |
| 144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); |
| 145 | break; |
| 146 | case 3: |
| 147 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); |
| 148 | break; |
| 149 | default: |
| 150 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); |
| 151 | break; |
| 152 | } |
| 153 | |
| 154 | switch (rev) { |
| 155 | |
| 156 | case 0: /* PIIX4 A-step */ |
| 157 | case 1: /* PIIX4 B-step */ |
| 158 | /* |
| 159 | * See specification changes #13 ("Manual Throttle Duty Cycle") |
| 160 | * and #14 ("Enabling and Disabling Manual Throttle"), plus |
| 161 | * erratum #5 ("STPCLK# Deassertion Time") from the January |
| 162 | * 2002 PIIX4 specification update. Applies to only older |
| 163 | * PIIX4 models. |
| 164 | */ |
| 165 | errata.piix4.throttle = 1; |
| 166 | |
| 167 | case 2: /* PIIX4E */ |
| 168 | case 3: /* PIIX4M */ |
| 169 | /* |
| 170 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA |
| 171 | * Livelock") from the January 2002 PIIX4 specification update. |
| 172 | * Applies to all PIIX4 models. |
| 173 | */ |
| 174 | |
| 175 | /* |
| 176 | * BM-IDE |
| 177 | * ------ |
| 178 | * Find the PIIX4 IDE Controller and get the Bus Master IDE |
| 179 | * Status register address. We'll use this later to read |
| 180 | * each IDE controller's DMA status to make sure we catch all |
| 181 | * DMA activity. |
| 182 | */ |
| 183 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | PCI_DEVICE_ID_INTEL_82371AB, |
| 185 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | if (dev) { |
| 187 | errata.piix4.bmisx = pci_resource_start(dev, 4); |
| 188 | pci_dev_put(dev); |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * Type-F DMA |
| 193 | * ---------- |
| 194 | * Find the PIIX4 ISA Controller and read the Motherboard |
| 195 | * DMA controller's status to see if Type-F (Fast) DMA mode |
| 196 | * is enabled (bit 7) on either channel. Note that we'll |
| 197 | * disable C3 support if this is enabled, as some legacy |
| 198 | * devices won't operate well if fast DMA is disabled. |
| 199 | */ |
| 200 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | PCI_DEVICE_ID_INTEL_82371AB_0, |
| 202 | PCI_ANY_ID, PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | if (dev) { |
| 204 | pci_read_config_byte(dev, 0x76, &value1); |
| 205 | pci_read_config_byte(dev, 0x77, &value2); |
| 206 | if ((value1 & 0x80) || (value2 & 0x80)) |
| 207 | errata.piix4.fdma = 1; |
| 208 | pci_dev_put(dev); |
| 209 | } |
| 210 | |
| 211 | break; |
| 212 | } |
| 213 | |
| 214 | if (errata.piix4.bmisx) |
| 215 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 216 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | if (errata.piix4.fdma) |
| 218 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 219 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
| 221 | return_VALUE(0); |
| 222 | } |
| 223 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 224 | static int acpi_processor_errata(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 226 | int result = 0; |
| 227 | struct pci_dev *dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
| 229 | ACPI_FUNCTION_TRACE("acpi_processor_errata"); |
| 230 | |
| 231 | if (!pr) |
| 232 | return_VALUE(-EINVAL); |
| 233 | |
| 234 | /* |
| 235 | * PIIX4 |
| 236 | */ |
| 237 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 238 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
| 239 | PCI_ANY_ID, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | if (dev) { |
| 241 | result = acpi_processor_errata_piix4(dev); |
| 242 | pci_dev_put(dev); |
| 243 | } |
| 244 | |
| 245 | return_VALUE(result); |
| 246 | } |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | /* -------------------------------------------------------------------------- |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 249 | Common ACPI processor fucntions |
| 250 | -------------------------------------------------------------------------- */ |
| 251 | |
| 252 | /* |
| 253 | * _PDC is required for a BIOS-OS handshake for most of the newer |
| 254 | * ACPI processor features. |
| 255 | */ |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame^] | 256 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 257 | { |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame^] | 258 | struct acpi_object_list *pdc_in = pr->pdc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 259 | acpi_status status = AE_OK; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 260 | |
| 261 | ACPI_FUNCTION_TRACE("acpi_processor_set_pdc"); |
| 262 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame^] | 263 | if (!pdc_in) |
| 264 | return_VALUE(status); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 265 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame^] | 266 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 267 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame^] | 268 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 269 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame^] | 270 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 271 | |
| 272 | return_VALUE(status); |
| 273 | } |
| 274 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 275 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | FS Interface (/proc) |
| 277 | -------------------------------------------------------------------------- */ |
| 278 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 279 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) |
| 282 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 283 | struct acpi_processor *pr = (struct acpi_processor *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | ACPI_FUNCTION_TRACE("acpi_processor_info_seq_show"); |
| 286 | |
| 287 | if (!pr) |
| 288 | goto end; |
| 289 | |
| 290 | seq_printf(seq, "processor id: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 291 | "acpi id: %d\n" |
| 292 | "bus mastering control: %s\n" |
| 293 | "power management: %s\n" |
| 294 | "throttling control: %s\n" |
| 295 | "limit interface: %s\n", |
| 296 | pr->id, |
| 297 | pr->acpi_id, |
| 298 | pr->flags.bm_control ? "yes" : "no", |
| 299 | pr->flags.power ? "yes" : "no", |
| 300 | pr->flags.throttling ? "yes" : "no", |
| 301 | pr->flags.limit ? "yes" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 303 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | return_VALUE(0); |
| 305 | } |
| 306 | |
| 307 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) |
| 308 | { |
| 309 | return single_open(file, acpi_processor_info_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 310 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
| 312 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 313 | static int acpi_processor_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 315 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | ACPI_FUNCTION_TRACE("acpi_processor_add_fs"); |
| 318 | |
| 319 | if (!acpi_device_dir(device)) { |
| 320 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 321 | acpi_processor_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | if (!acpi_device_dir(device)) |
| 323 | return_VALUE(-ENODEV); |
| 324 | } |
| 325 | acpi_device_dir(device)->owner = THIS_MODULE; |
| 326 | |
| 327 | /* 'info' [R] */ |
| 328 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 329 | S_IRUGO, acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | if (!entry) |
| 331 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 332 | "Unable to create '%s' fs entry\n", |
| 333 | ACPI_PROCESSOR_FILE_INFO)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | else { |
| 335 | entry->proc_fops = &acpi_processor_info_fops; |
| 336 | entry->data = acpi_driver_data(device); |
| 337 | entry->owner = THIS_MODULE; |
| 338 | } |
| 339 | |
| 340 | /* 'throttling' [R/W] */ |
| 341 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 342 | S_IFREG | S_IRUGO | S_IWUSR, |
| 343 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | if (!entry) |
| 345 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 346 | "Unable to create '%s' fs entry\n", |
| 347 | ACPI_PROCESSOR_FILE_THROTTLING)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | else { |
| 349 | entry->proc_fops = &acpi_processor_throttling_fops; |
| 350 | entry->proc_fops->write = acpi_processor_write_throttling; |
| 351 | entry->data = acpi_driver_data(device); |
| 352 | entry->owner = THIS_MODULE; |
| 353 | } |
| 354 | |
| 355 | /* 'limit' [R/W] */ |
| 356 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 357 | S_IFREG | S_IRUGO | S_IWUSR, |
| 358 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | if (!entry) |
| 360 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 361 | "Unable to create '%s' fs entry\n", |
| 362 | ACPI_PROCESSOR_FILE_LIMIT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | else { |
| 364 | entry->proc_fops = &acpi_processor_limit_fops; |
| 365 | entry->proc_fops->write = acpi_processor_write_limit; |
| 366 | entry->data = acpi_driver_data(device); |
| 367 | entry->owner = THIS_MODULE; |
| 368 | } |
| 369 | |
| 370 | return_VALUE(0); |
| 371 | } |
| 372 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 373 | static int acpi_processor_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | { |
| 375 | ACPI_FUNCTION_TRACE("acpi_processor_remove_fs"); |
| 376 | |
| 377 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 378 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
| 379 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 381 | acpi_device_dir(device)); |
| 382 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
| 383 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
| 385 | acpi_device_dir(device) = NULL; |
| 386 | } |
| 387 | |
| 388 | return_VALUE(0); |
| 389 | } |
| 390 | |
| 391 | /* Use the acpiid in MADT to map cpus in case of SMP */ |
| 392 | #ifndef CONFIG_SMP |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 393 | #define convert_acpiid_to_cpu(acpi_id) (0xff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | #else |
| 395 | |
| 396 | #ifdef CONFIG_IA64 |
| 397 | #define arch_acpiid_to_apicid ia64_acpiid_to_sapicid |
| 398 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid |
| 399 | #define ARCH_BAD_APICID (0xffff) |
| 400 | #else |
| 401 | #define arch_acpiid_to_apicid x86_acpiid_to_apicid |
| 402 | #define arch_cpu_to_apicid x86_cpu_to_apicid |
| 403 | #define ARCH_BAD_APICID (0xff) |
| 404 | #endif |
| 405 | |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 406 | static u8 convert_acpiid_to_cpu(u8 acpi_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { |
| 408 | u16 apic_id; |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 409 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
| 411 | apic_id = arch_acpiid_to_apicid[acpi_id]; |
| 412 | if (apic_id == ARCH_BAD_APICID) |
| 413 | return -1; |
| 414 | |
| 415 | for (i = 0; i < NR_CPUS; i++) { |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 416 | if (arch_cpu_to_apicid[i] == apic_id) |
| 417 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
| 419 | return -1; |
| 420 | } |
| 421 | #endif |
| 422 | |
| 423 | /* -------------------------------------------------------------------------- |
| 424 | Driver Interface |
| 425 | -------------------------------------------------------------------------- */ |
| 426 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 427 | static int acpi_processor_get_info(struct acpi_processor *pr) |
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 | acpi_status status = 0; |
| 430 | union acpi_object object = { 0 }; |
| 431 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 432 | u8 cpu_index; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 433 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
| 435 | ACPI_FUNCTION_TRACE("acpi_processor_get_info"); |
| 436 | |
| 437 | if (!pr) |
| 438 | return_VALUE(-EINVAL); |
| 439 | |
| 440 | if (num_online_cpus() > 1) |
| 441 | errata.smp = TRUE; |
| 442 | |
| 443 | acpi_processor_errata(pr); |
| 444 | |
| 445 | /* |
| 446 | * Check to see if we have bus mastering arbitration control. This |
| 447 | * is required for proper C3 usage (to maintain cache coherency). |
| 448 | */ |
| 449 | if (acpi_fadt.V1_pm2_cnt_blk && acpi_fadt.pm2_cnt_len) { |
| 450 | pr->flags.bm_control = 1; |
| 451 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 452 | "Bus mastering arbitration control present\n")); |
| 453 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 455 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
| 457 | /* |
| 458 | * Evalute the processor object. Note that it is common on SMP to |
| 459 | * have the first (boot) processor with a valid PBLK address while |
| 460 | * all others have a NULL address. |
| 461 | */ |
| 462 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 463 | if (ACPI_FAILURE(status)) { |
| 464 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 465 | "Error evaluating processor object\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | return_VALUE(-ENODEV); |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 471 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | */ |
| 473 | pr->acpi_id = object.processor.proc_id; |
| 474 | |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 475 | cpu_index = convert_acpiid_to_cpu(pr->acpi_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 477 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 478 | if (!cpu0_initialized && (cpu_index == 0xff) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 479 | (num_online_cpus() == 1)) { |
| 480 | cpu_index = 0; |
| 481 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 483 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 485 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 487 | /* |
| 488 | * Extra Processor objects may be enumerated on MP systems with |
| 489 | * less than the max # of CPUs. They should be ignored _iff |
| 490 | * they are physically not present. |
| 491 | */ |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 492 | if (cpu_index >= NR_CPUS) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 493 | if (ACPI_FAILURE |
| 494 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
Len Brown | 4a35a46 | 2005-09-03 12:40:06 -0400 | [diff] [blame] | 495 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 496 | "Error getting cpuindex for acpiid 0x%x\n", |
| 497 | pr->acpi_id)); |
| 498 | return_VALUE(-ENODEV); |
| 499 | } |
| 500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
| 502 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 503 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
| 505 | if (!object.processor.pblk_address) |
| 506 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 507 | else if (object.processor.pblk_length != 6) |
| 508 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid PBLK length [%d]\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 509 | object.processor.pblk_length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | else { |
| 511 | pr->throttling.address = object.processor.pblk_address; |
| 512 | pr->throttling.duty_offset = acpi_fadt.duty_offset; |
| 513 | pr->throttling.duty_width = acpi_fadt.duty_width; |
| 514 | |
| 515 | pr->pblk = object.processor.pblk_address; |
| 516 | |
| 517 | /* |
| 518 | * We don't care about error returns - we just try to mark |
| 519 | * these reserved so that nobody else is confused into thinking |
| 520 | * that this region might be unused.. |
| 521 | * |
| 522 | * (In particular, allocating the IO range for Cardbus) |
| 523 | */ |
| 524 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 525 | } |
| 526 | |
| 527 | #ifdef CONFIG_CPU_FREQ |
| 528 | acpi_processor_ppc_has_changed(pr); |
| 529 | #endif |
| 530 | acpi_processor_get_throttling_info(pr); |
| 531 | acpi_processor_get_limit_info(pr); |
| 532 | |
| 533 | return_VALUE(0); |
| 534 | } |
| 535 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 536 | static int acpi_processor_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 538 | int result = 0; |
| 539 | acpi_status status = AE_OK; |
| 540 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
| 542 | ACPI_FUNCTION_TRACE("acpi_processor_start"); |
| 543 | |
| 544 | pr = acpi_driver_data(device); |
| 545 | |
| 546 | result = acpi_processor_get_info(pr); |
| 547 | if (result) { |
| 548 | /* Processor is physically not present */ |
| 549 | return_VALUE(0); |
| 550 | } |
| 551 | |
| 552 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); |
| 553 | |
| 554 | processors[pr->id] = pr; |
| 555 | |
| 556 | result = acpi_processor_add_fs(device); |
| 557 | if (result) |
| 558 | goto end; |
| 559 | |
| 560 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 561 | acpi_processor_notify, pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | if (ACPI_FAILURE(status)) { |
| 563 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 564 | "Error installing device notify handler\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | } |
| 566 | |
Venkatesh Pallipadi | 05131ec | 2005-10-23 16:31:00 -0400 | [diff] [blame^] | 567 | /* _PDC call should be done before doing anything else (if reqd.). */ |
| 568 | arch_acpi_processor_init_pdc(pr); |
| 569 | acpi_processor_set_pdc(pr); |
| 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | acpi_processor_power_init(pr, device); |
| 572 | |
| 573 | if (pr->flags.throttling) { |
| 574 | printk(KERN_INFO PREFIX "%s [%s] (supports", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 575 | acpi_device_name(device), acpi_device_bid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | printk(" %d throttling states", pr->throttling.state_count); |
| 577 | printk(")\n"); |
| 578 | } |
| 579 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 580 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | |
| 582 | return_VALUE(result); |
| 583 | } |
| 584 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 585 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 587 | struct acpi_processor *pr = (struct acpi_processor *)data; |
| 588 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
| 590 | ACPI_FUNCTION_TRACE("acpi_processor_notify"); |
| 591 | |
| 592 | if (!pr) |
| 593 | return_VOID; |
| 594 | |
| 595 | if (acpi_bus_get_device(pr->handle, &device)) |
| 596 | return_VOID; |
| 597 | |
| 598 | switch (event) { |
| 599 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
| 600 | acpi_processor_ppc_has_changed(pr); |
| 601 | acpi_bus_generate_event(device, event, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 602 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | break; |
| 604 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 605 | acpi_processor_cst_has_changed(pr); |
| 606 | acpi_bus_generate_event(device, event, 0); |
| 607 | break; |
| 608 | default: |
| 609 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 610 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | break; |
| 612 | } |
| 613 | |
| 614 | return_VOID; |
| 615 | } |
| 616 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 617 | static int acpi_processor_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 619 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
| 621 | ACPI_FUNCTION_TRACE("acpi_processor_add"); |
| 622 | |
| 623 | if (!device) |
| 624 | return_VALUE(-EINVAL); |
| 625 | |
| 626 | pr = kmalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
| 627 | if (!pr) |
| 628 | return_VALUE(-ENOMEM); |
| 629 | memset(pr, 0, sizeof(struct acpi_processor)); |
| 630 | |
| 631 | pr->handle = device->handle; |
| 632 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 633 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
| 634 | acpi_driver_data(device) = pr; |
| 635 | |
| 636 | return_VALUE(0); |
| 637 | } |
| 638 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 639 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 641 | acpi_status status = AE_OK; |
| 642 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
| 644 | ACPI_FUNCTION_TRACE("acpi_processor_remove"); |
| 645 | |
| 646 | if (!device || !acpi_driver_data(device)) |
| 647 | return_VALUE(-EINVAL); |
| 648 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 649 | pr = (struct acpi_processor *)acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
| 651 | if (pr->id >= NR_CPUS) { |
| 652 | kfree(pr); |
| 653 | return_VALUE(0); |
| 654 | } |
| 655 | |
| 656 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 657 | if (acpi_processor_handle_eject(pr)) |
| 658 | return_VALUE(-EINVAL); |
| 659 | } |
| 660 | |
| 661 | acpi_processor_power_exit(pr, device); |
| 662 | |
| 663 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 664 | acpi_processor_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | if (ACPI_FAILURE(status)) { |
| 666 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 667 | "Error removing notify handler\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | acpi_processor_remove_fs(device); |
| 671 | |
| 672 | processors[pr->id] = NULL; |
| 673 | |
| 674 | kfree(pr); |
| 675 | |
| 676 | return_VALUE(0); |
| 677 | } |
| 678 | |
| 679 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 680 | /**************************************************************************** |
| 681 | * Acpi processor hotplug support * |
| 682 | ****************************************************************************/ |
| 683 | |
| 684 | static int is_processor_present(acpi_handle handle); |
| 685 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 686 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 688 | acpi_status status; |
| 689 | unsigned long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
| 691 | ACPI_FUNCTION_TRACE("is_processor_present"); |
| 692 | |
| 693 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
| 694 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_PRESENT)) { |
| 695 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 696 | "Processor Device is not present\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | return_VALUE(0); |
| 698 | } |
| 699 | return_VALUE(1); |
| 700 | } |
| 701 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 703 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 705 | acpi_handle phandle; |
| 706 | struct acpi_device *pdev; |
| 707 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
| 709 | ACPI_FUNCTION_TRACE("acpi_processor_device_add"); |
| 710 | |
| 711 | if (acpi_get_parent(handle, &phandle)) { |
| 712 | return_VALUE(-ENODEV); |
| 713 | } |
| 714 | |
| 715 | if (acpi_bus_get_device(phandle, &pdev)) { |
| 716 | return_VALUE(-ENODEV); |
| 717 | } |
| 718 | |
| 719 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
| 720 | return_VALUE(-ENODEV); |
| 721 | } |
| 722 | |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 723 | acpi_bus_start(*device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
| 725 | pr = acpi_driver_data(*device); |
| 726 | if (!pr) |
| 727 | return_VALUE(-ENODEV); |
| 728 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 729 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | kobject_hotplug(&(*device)->kobj, KOBJ_ONLINE); |
| 731 | } |
| 732 | return_VALUE(0); |
| 733 | } |
| 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | static void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 736 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 738 | struct acpi_processor *pr; |
| 739 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | int result; |
| 741 | |
| 742 | ACPI_FUNCTION_TRACE("acpi_processor_hotplug_notify"); |
| 743 | |
| 744 | switch (event) { |
| 745 | case ACPI_NOTIFY_BUS_CHECK: |
| 746 | case ACPI_NOTIFY_DEVICE_CHECK: |
| 747 | printk("Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 748 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
| 749 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
| 751 | if (!is_processor_present(handle)) |
| 752 | break; |
| 753 | |
| 754 | if (acpi_bus_get_device(handle, &device)) { |
| 755 | result = acpi_processor_device_add(handle, &device); |
| 756 | if (result) |
| 757 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 758 | "Unable to add the device\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | break; |
| 760 | } |
| 761 | |
| 762 | pr = acpi_driver_data(device); |
| 763 | if (!pr) { |
| 764 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 765 | "Driver data is NULL\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | break; |
| 767 | } |
| 768 | |
| 769 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { |
| 770 | kobject_hotplug(&device->kobj, KOBJ_OFFLINE); |
| 771 | break; |
| 772 | } |
| 773 | |
| 774 | result = acpi_processor_start(device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 775 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | kobject_hotplug(&device->kobj, KOBJ_ONLINE); |
| 777 | } else { |
| 778 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 779 | "Device [%s] failed to start\n", |
| 780 | acpi_device_bid(device))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 782 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 784 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 785 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
| 787 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 788 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 789 | "Device don't exist, dropping EJECT\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | break; |
| 791 | } |
| 792 | pr = acpi_driver_data(device); |
| 793 | if (!pr) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 794 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 795 | "Driver data is NULL, dropping EJECT\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | return_VOID; |
| 797 | } |
| 798 | |
| 799 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) |
| 800 | kobject_hotplug(&device->kobj, KOBJ_OFFLINE); |
| 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 | |
| 808 | return_VOID; |
| 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 | { |
| 847 | ACPI_FUNCTION_TRACE("acpi_processor_hotadd_init"); |
| 848 | |
| 849 | if (!is_processor_present(handle)) { |
| 850 | return_VALUE(AE_ERROR); |
| 851 | } |
| 852 | |
| 853 | if (acpi_map_lsapic(handle, p_cpu)) |
| 854 | return_VALUE(AE_ERROR); |
| 855 | |
| 856 | if (arch_register_cpu(*p_cpu)) { |
| 857 | acpi_unmap_lsapic(*p_cpu); |
| 858 | return_VALUE(AE_ERROR); |
| 859 | } |
| 860 | |
| 861 | return_VALUE(AE_OK); |
| 862 | } |
| 863 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 864 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | { |
| 866 | if (cpu_online(pr->id)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 867 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
| 869 | arch_unregister_cpu(pr->id); |
| 870 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 871 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
| 873 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 874 | 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] | 875 | { |
| 876 | return AE_ERROR; |
| 877 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 878 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 880 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | } |
| 882 | #endif |
| 883 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | static |
| 885 | void acpi_processor_install_hotplug_notify(void) |
| 886 | { |
| 887 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 888 | int action = INSTALL_NOTIFY_HANDLER; |
| 889 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 890 | ACPI_ROOT_OBJECT, |
| 891 | ACPI_UINT32_MAX, |
| 892 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | #endif |
| 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, |
| 904 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | #endif |
| 906 | } |
| 907 | |
| 908 | /* |
| 909 | * We keep the driver loaded even when ACPI is not running. |
| 910 | * This is needed for the powernow-k8 driver, that works even without |
| 911 | * ACPI, but needs symbols from this driver |
| 912 | */ |
| 913 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 914 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 916 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
| 918 | ACPI_FUNCTION_TRACE("acpi_processor_init"); |
| 919 | |
| 920 | memset(&processors, 0, sizeof(processors)); |
| 921 | memset(&errata, 0, sizeof(errata)); |
| 922 | |
| 923 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 924 | if (!acpi_processor_dir) |
| 925 | return_VALUE(0); |
| 926 | acpi_processor_dir->owner = THIS_MODULE; |
| 927 | |
| 928 | result = acpi_bus_register_driver(&acpi_processor_driver); |
| 929 | if (result < 0) { |
| 930 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 931 | return_VALUE(0); |
| 932 | } |
| 933 | |
| 934 | acpi_processor_install_hotplug_notify(); |
| 935 | |
| 936 | acpi_thermal_cpufreq_init(); |
| 937 | |
| 938 | acpi_processor_ppc_init(); |
| 939 | |
| 940 | return_VALUE(0); |
| 941 | } |
| 942 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 943 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | { |
| 945 | ACPI_FUNCTION_TRACE("acpi_processor_exit"); |
| 946 | |
| 947 | acpi_processor_ppc_exit(); |
| 948 | |
| 949 | acpi_thermal_cpufreq_exit(); |
| 950 | |
| 951 | acpi_processor_uninstall_hotplug_notify(); |
| 952 | |
| 953 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 954 | |
| 955 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 956 | |
| 957 | return_VOID; |
| 958 | } |
| 959 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | module_init(acpi_processor_init); |
| 961 | module_exit(acpi_processor_exit); |
| 962 | |
| 963 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); |
| 964 | |
| 965 | MODULE_ALIAS("processor"); |