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 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 224 | 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 | */ |
| 256 | |
| 257 | int acpi_processor_set_pdc(struct acpi_processor *pr, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 258 | struct acpi_object_list *pdc_in) |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 259 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 260 | acpi_status status = AE_OK; |
| 261 | u32 arg0_buf[3]; |
| 262 | union acpi_object arg0 = { ACPI_TYPE_BUFFER }; |
| 263 | struct acpi_object_list no_object = { 1, &arg0 }; |
| 264 | struct acpi_object_list *pdc; |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 265 | |
| 266 | ACPI_FUNCTION_TRACE("acpi_processor_set_pdc"); |
| 267 | |
| 268 | arg0.buffer.length = 12; |
| 269 | arg0.buffer.pointer = (u8 *) arg0_buf; |
| 270 | arg0_buf[0] = ACPI_PDC_REVISION_ID; |
| 271 | arg0_buf[1] = 0; |
| 272 | arg0_buf[2] = 0; |
| 273 | |
| 274 | pdc = (pdc_in) ? pdc_in : &no_object; |
| 275 | |
| 276 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc, NULL); |
| 277 | |
| 278 | if ((ACPI_FAILURE(status)) && (pdc_in)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 279 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 280 | "Error evaluating _PDC, using legacy perf. control...\n")); |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 281 | |
| 282 | return_VALUE(status); |
| 283 | } |
| 284 | |
Venkatesh Pallipadi | 02df8b9 | 2005-04-15 15:07:10 -0400 | [diff] [blame] | 285 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | FS Interface (/proc) |
| 287 | -------------------------------------------------------------------------- */ |
| 288 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 289 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) |
| 292 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 293 | struct acpi_processor *pr = (struct acpi_processor *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
| 295 | ACPI_FUNCTION_TRACE("acpi_processor_info_seq_show"); |
| 296 | |
| 297 | if (!pr) |
| 298 | goto end; |
| 299 | |
| 300 | seq_printf(seq, "processor id: %d\n" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 301 | "acpi id: %d\n" |
| 302 | "bus mastering control: %s\n" |
| 303 | "power management: %s\n" |
| 304 | "throttling control: %s\n" |
| 305 | "limit interface: %s\n", |
| 306 | pr->id, |
| 307 | pr->acpi_id, |
| 308 | pr->flags.bm_control ? "yes" : "no", |
| 309 | pr->flags.power ? "yes" : "no", |
| 310 | pr->flags.throttling ? "yes" : "no", |
| 311 | pr->flags.limit ? "yes" : "no"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 313 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | return_VALUE(0); |
| 315 | } |
| 316 | |
| 317 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) |
| 318 | { |
| 319 | return single_open(file, acpi_processor_info_seq_show, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 320 | PDE(inode)->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 323 | static int acpi_processor_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 325 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | ACPI_FUNCTION_TRACE("acpi_processor_add_fs"); |
| 328 | |
| 329 | if (!acpi_device_dir(device)) { |
| 330 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 331 | acpi_processor_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | if (!acpi_device_dir(device)) |
| 333 | return_VALUE(-ENODEV); |
| 334 | } |
| 335 | acpi_device_dir(device)->owner = THIS_MODULE; |
| 336 | |
| 337 | /* 'info' [R] */ |
| 338 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 339 | S_IRUGO, acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | if (!entry) |
| 341 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 342 | "Unable to create '%s' fs entry\n", |
| 343 | ACPI_PROCESSOR_FILE_INFO)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | else { |
| 345 | entry->proc_fops = &acpi_processor_info_fops; |
| 346 | entry->data = acpi_driver_data(device); |
| 347 | entry->owner = THIS_MODULE; |
| 348 | } |
| 349 | |
| 350 | /* 'throttling' [R/W] */ |
| 351 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 352 | S_IFREG | S_IRUGO | S_IWUSR, |
| 353 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | if (!entry) |
| 355 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 356 | "Unable to create '%s' fs entry\n", |
| 357 | ACPI_PROCESSOR_FILE_THROTTLING)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | else { |
| 359 | entry->proc_fops = &acpi_processor_throttling_fops; |
| 360 | entry->proc_fops->write = acpi_processor_write_throttling; |
| 361 | entry->data = acpi_driver_data(device); |
| 362 | entry->owner = THIS_MODULE; |
| 363 | } |
| 364 | |
| 365 | /* 'limit' [R/W] */ |
| 366 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 367 | S_IFREG | S_IRUGO | S_IWUSR, |
| 368 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if (!entry) |
| 370 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 371 | "Unable to create '%s' fs entry\n", |
| 372 | ACPI_PROCESSOR_FILE_LIMIT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | else { |
| 374 | entry->proc_fops = &acpi_processor_limit_fops; |
| 375 | entry->proc_fops->write = acpi_processor_write_limit; |
| 376 | entry->data = acpi_driver_data(device); |
| 377 | entry->owner = THIS_MODULE; |
| 378 | } |
| 379 | |
| 380 | return_VALUE(0); |
| 381 | } |
| 382 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 383 | static int acpi_processor_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
| 385 | ACPI_FUNCTION_TRACE("acpi_processor_remove_fs"); |
| 386 | |
| 387 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 388 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
| 389 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 391 | acpi_device_dir(device)); |
| 392 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, |
| 393 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
| 395 | acpi_device_dir(device) = NULL; |
| 396 | } |
| 397 | |
| 398 | return_VALUE(0); |
| 399 | } |
| 400 | |
| 401 | /* Use the acpiid in MADT to map cpus in case of SMP */ |
| 402 | #ifndef CONFIG_SMP |
| 403 | #define convert_acpiid_to_cpu(acpi_id) (0xff) |
| 404 | #else |
| 405 | |
| 406 | #ifdef CONFIG_IA64 |
| 407 | #define arch_acpiid_to_apicid ia64_acpiid_to_sapicid |
| 408 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid |
| 409 | #define ARCH_BAD_APICID (0xffff) |
| 410 | #else |
| 411 | #define arch_acpiid_to_apicid x86_acpiid_to_apicid |
| 412 | #define arch_cpu_to_apicid x86_cpu_to_apicid |
| 413 | #define ARCH_BAD_APICID (0xff) |
| 414 | #endif |
| 415 | |
| 416 | static u8 convert_acpiid_to_cpu(u8 acpi_id) |
| 417 | { |
| 418 | u16 apic_id; |
| 419 | int i; |
| 420 | |
| 421 | apic_id = arch_acpiid_to_apicid[acpi_id]; |
| 422 | if (apic_id == ARCH_BAD_APICID) |
| 423 | return -1; |
| 424 | |
| 425 | for (i = 0; i < NR_CPUS; i++) { |
| 426 | if (arch_cpu_to_apicid[i] == apic_id) |
| 427 | return i; |
| 428 | } |
| 429 | return -1; |
| 430 | } |
| 431 | #endif |
| 432 | |
| 433 | /* -------------------------------------------------------------------------- |
| 434 | Driver Interface |
| 435 | -------------------------------------------------------------------------- */ |
| 436 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 437 | static int acpi_processor_get_info(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 439 | acpi_status status = 0; |
| 440 | union acpi_object object = { 0 }; |
| 441 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; |
| 442 | u8 cpu_index; |
| 443 | static int cpu0_initialized; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | ACPI_FUNCTION_TRACE("acpi_processor_get_info"); |
| 446 | |
| 447 | if (!pr) |
| 448 | return_VALUE(-EINVAL); |
| 449 | |
| 450 | if (num_online_cpus() > 1) |
| 451 | errata.smp = TRUE; |
| 452 | |
| 453 | acpi_processor_errata(pr); |
| 454 | |
| 455 | /* |
| 456 | * Check to see if we have bus mastering arbitration control. This |
| 457 | * is required for proper C3 usage (to maintain cache coherency). |
| 458 | */ |
| 459 | if (acpi_fadt.V1_pm2_cnt_blk && acpi_fadt.pm2_cnt_len) { |
| 460 | pr->flags.bm_control = 1; |
| 461 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 462 | "Bus mastering arbitration control present\n")); |
| 463 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 465 | "No bus mastering arbitration control\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
| 467 | /* |
| 468 | * Evalute the processor object. Note that it is common on SMP to |
| 469 | * have the first (boot) processor with a valid PBLK address while |
| 470 | * all others have a NULL address. |
| 471 | */ |
| 472 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
| 473 | if (ACPI_FAILURE(status)) { |
| 474 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 475 | "Error evaluating processor object\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | return_VALUE(-ENODEV); |
| 477 | } |
| 478 | |
| 479 | /* |
| 480 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 481 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | */ |
| 483 | pr->acpi_id = object.processor.proc_id; |
| 484 | |
| 485 | cpu_index = convert_acpiid_to_cpu(pr->acpi_id); |
| 486 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 487 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
| 488 | if (!cpu0_initialized && (cpu_index == 0xff) && |
| 489 | (num_online_cpus() == 1)) { |
| 490 | cpu_index = 0; |
| 491 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 493 | cpu0_initialized = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 495 | pr->id = cpu_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 497 | /* |
| 498 | * Extra Processor objects may be enumerated on MP systems with |
| 499 | * less than the max # of CPUs. They should be ignored _iff |
| 500 | * they are physically not present. |
| 501 | */ |
| 502 | if (cpu_index >= NR_CPUS) { |
| 503 | if (ACPI_FAILURE |
| 504 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { |
| 505 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 506 | "Error getting cpuindex for acpiid 0x%x\n", |
| 507 | pr->acpi_id)); |
| 508 | return_VALUE(-ENODEV); |
| 509 | } |
| 510 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
| 512 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 513 | pr->acpi_id)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | |
| 515 | if (!object.processor.pblk_address) |
| 516 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); |
| 517 | else if (object.processor.pblk_length != 6) |
| 518 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid PBLK length [%d]\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 519 | object.processor.pblk_length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | else { |
| 521 | pr->throttling.address = object.processor.pblk_address; |
| 522 | pr->throttling.duty_offset = acpi_fadt.duty_offset; |
| 523 | pr->throttling.duty_width = acpi_fadt.duty_width; |
| 524 | |
| 525 | pr->pblk = object.processor.pblk_address; |
| 526 | |
| 527 | /* |
| 528 | * We don't care about error returns - we just try to mark |
| 529 | * these reserved so that nobody else is confused into thinking |
| 530 | * that this region might be unused.. |
| 531 | * |
| 532 | * (In particular, allocating the IO range for Cardbus) |
| 533 | */ |
| 534 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); |
| 535 | } |
| 536 | |
| 537 | #ifdef CONFIG_CPU_FREQ |
| 538 | acpi_processor_ppc_has_changed(pr); |
| 539 | #endif |
| 540 | acpi_processor_get_throttling_info(pr); |
| 541 | acpi_processor_get_limit_info(pr); |
| 542 | |
| 543 | return_VALUE(0); |
| 544 | } |
| 545 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 546 | static int acpi_processor_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 548 | int result = 0; |
| 549 | acpi_status status = AE_OK; |
| 550 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
| 552 | ACPI_FUNCTION_TRACE("acpi_processor_start"); |
| 553 | |
| 554 | pr = acpi_driver_data(device); |
| 555 | |
| 556 | result = acpi_processor_get_info(pr); |
| 557 | if (result) { |
| 558 | /* Processor is physically not present */ |
| 559 | return_VALUE(0); |
| 560 | } |
| 561 | |
| 562 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); |
| 563 | |
| 564 | processors[pr->id] = pr; |
| 565 | |
| 566 | result = acpi_processor_add_fs(device); |
| 567 | if (result) |
| 568 | goto end; |
| 569 | |
| 570 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 571 | acpi_processor_notify, pr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | if (ACPI_FAILURE(status)) { |
| 573 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 574 | "Error installing device notify handler\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | acpi_processor_power_init(pr, device); |
| 578 | |
| 579 | if (pr->flags.throttling) { |
| 580 | printk(KERN_INFO PREFIX "%s [%s] (supports", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 581 | acpi_device_name(device), acpi_device_bid(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | printk(" %d throttling states", pr->throttling.state_count); |
| 583 | printk(")\n"); |
| 584 | } |
| 585 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 586 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
| 588 | return_VALUE(result); |
| 589 | } |
| 590 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 591 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 593 | struct acpi_processor *pr = (struct acpi_processor *)data; |
| 594 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | |
| 596 | ACPI_FUNCTION_TRACE("acpi_processor_notify"); |
| 597 | |
| 598 | if (!pr) |
| 599 | return_VOID; |
| 600 | |
| 601 | if (acpi_bus_get_device(pr->handle, &device)) |
| 602 | return_VOID; |
| 603 | |
| 604 | switch (event) { |
| 605 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: |
| 606 | acpi_processor_ppc_has_changed(pr); |
| 607 | acpi_bus_generate_event(device, event, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 608 | pr->performance_platform_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | break; |
| 610 | case ACPI_PROCESSOR_NOTIFY_POWER: |
| 611 | acpi_processor_cst_has_changed(pr); |
| 612 | acpi_bus_generate_event(device, event, 0); |
| 613 | break; |
| 614 | default: |
| 615 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 616 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | break; |
| 618 | } |
| 619 | |
| 620 | return_VOID; |
| 621 | } |
| 622 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 623 | static int acpi_processor_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 625 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | ACPI_FUNCTION_TRACE("acpi_processor_add"); |
| 628 | |
| 629 | if (!device) |
| 630 | return_VALUE(-EINVAL); |
| 631 | |
| 632 | pr = kmalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
| 633 | if (!pr) |
| 634 | return_VALUE(-ENOMEM); |
| 635 | memset(pr, 0, sizeof(struct acpi_processor)); |
| 636 | |
| 637 | pr->handle = device->handle; |
| 638 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); |
| 639 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); |
| 640 | acpi_driver_data(device) = pr; |
| 641 | |
| 642 | return_VALUE(0); |
| 643 | } |
| 644 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 645 | static int acpi_processor_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 647 | acpi_status status = AE_OK; |
| 648 | struct acpi_processor *pr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
| 650 | ACPI_FUNCTION_TRACE("acpi_processor_remove"); |
| 651 | |
| 652 | if (!device || !acpi_driver_data(device)) |
| 653 | return_VALUE(-EINVAL); |
| 654 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 655 | pr = (struct acpi_processor *)acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
| 657 | if (pr->id >= NR_CPUS) { |
| 658 | kfree(pr); |
| 659 | return_VALUE(0); |
| 660 | } |
| 661 | |
| 662 | if (type == ACPI_BUS_REMOVAL_EJECT) { |
| 663 | if (acpi_processor_handle_eject(pr)) |
| 664 | return_VALUE(-EINVAL); |
| 665 | } |
| 666 | |
| 667 | acpi_processor_power_exit(pr, device); |
| 668 | |
| 669 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 670 | acpi_processor_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | if (ACPI_FAILURE(status)) { |
| 672 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 673 | "Error removing notify handler\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | acpi_processor_remove_fs(device); |
| 677 | |
| 678 | processors[pr->id] = NULL; |
| 679 | |
| 680 | kfree(pr); |
| 681 | |
| 682 | return_VALUE(0); |
| 683 | } |
| 684 | |
| 685 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 686 | /**************************************************************************** |
| 687 | * Acpi processor hotplug support * |
| 688 | ****************************************************************************/ |
| 689 | |
| 690 | static int is_processor_present(acpi_handle handle); |
| 691 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 692 | static int is_processor_present(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 694 | acpi_status status; |
| 695 | unsigned long sta = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
| 697 | ACPI_FUNCTION_TRACE("is_processor_present"); |
| 698 | |
| 699 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
| 700 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_PRESENT)) { |
| 701 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 702 | "Processor Device is not present\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | return_VALUE(0); |
| 704 | } |
| 705 | return_VALUE(1); |
| 706 | } |
| 707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | static |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 709 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 711 | acpi_handle phandle; |
| 712 | struct acpi_device *pdev; |
| 713 | struct acpi_processor *pr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
| 715 | ACPI_FUNCTION_TRACE("acpi_processor_device_add"); |
| 716 | |
| 717 | if (acpi_get_parent(handle, &phandle)) { |
| 718 | return_VALUE(-ENODEV); |
| 719 | } |
| 720 | |
| 721 | if (acpi_bus_get_device(phandle, &pdev)) { |
| 722 | return_VALUE(-ENODEV); |
| 723 | } |
| 724 | |
| 725 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { |
| 726 | return_VALUE(-ENODEV); |
| 727 | } |
| 728 | |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 729 | acpi_bus_start(*device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | |
| 731 | pr = acpi_driver_data(*device); |
| 732 | if (!pr) |
| 733 | return_VALUE(-ENODEV); |
| 734 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 735 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | kobject_hotplug(&(*device)->kobj, KOBJ_ONLINE); |
| 737 | } |
| 738 | return_VALUE(0); |
| 739 | } |
| 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | static void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 742 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 744 | struct acpi_processor *pr; |
| 745 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | int result; |
| 747 | |
| 748 | ACPI_FUNCTION_TRACE("acpi_processor_hotplug_notify"); |
| 749 | |
| 750 | switch (event) { |
| 751 | case ACPI_NOTIFY_BUS_CHECK: |
| 752 | case ACPI_NOTIFY_DEVICE_CHECK: |
| 753 | printk("Processor driver received %s event\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 754 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
| 755 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
| 757 | if (!is_processor_present(handle)) |
| 758 | break; |
| 759 | |
| 760 | if (acpi_bus_get_device(handle, &device)) { |
| 761 | result = acpi_processor_device_add(handle, &device); |
| 762 | if (result) |
| 763 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 764 | "Unable to add the device\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | break; |
| 766 | } |
| 767 | |
| 768 | pr = acpi_driver_data(device); |
| 769 | if (!pr) { |
| 770 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 771 | "Driver data is NULL\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | break; |
| 773 | } |
| 774 | |
| 775 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { |
| 776 | kobject_hotplug(&device->kobj, KOBJ_OFFLINE); |
| 777 | break; |
| 778 | } |
| 779 | |
| 780 | result = acpi_processor_start(device); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 781 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | kobject_hotplug(&device->kobj, KOBJ_ONLINE); |
| 783 | } else { |
| 784 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 785 | "Device [%s] failed to start\n", |
| 786 | acpi_device_bid(device))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 788 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | case ACPI_NOTIFY_EJECT_REQUEST: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 790 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 791 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
| 793 | if (acpi_bus_get_device(handle, &device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 794 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 795 | "Device don't exist, dropping EJECT\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | break; |
| 797 | } |
| 798 | pr = acpi_driver_data(device); |
| 799 | if (!pr) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 800 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 801 | "Driver data is NULL, dropping EJECT\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | return_VOID; |
| 803 | } |
| 804 | |
| 805 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) |
| 806 | kobject_hotplug(&device->kobj, KOBJ_OFFLINE); |
| 807 | break; |
| 808 | default: |
| 809 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 810 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | break; |
| 812 | } |
| 813 | |
| 814 | return_VOID; |
| 815 | } |
| 816 | |
| 817 | static acpi_status |
| 818 | processor_walk_namespace_cb(acpi_handle handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 819 | u32 lvl, void *context, void **rv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 821 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | int *action = context; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 823 | acpi_object_type type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
| 825 | status = acpi_get_type(handle, &type); |
| 826 | if (ACPI_FAILURE(status)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 827 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
| 829 | if (type != ACPI_TYPE_PROCESSOR) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 830 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 832 | switch (*action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | case INSTALL_NOTIFY_HANDLER: |
| 834 | acpi_install_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 835 | ACPI_SYSTEM_NOTIFY, |
| 836 | acpi_processor_hotplug_notify, |
| 837 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | break; |
| 839 | case UNINSTALL_NOTIFY_HANDLER: |
| 840 | acpi_remove_notify_handler(handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 841 | ACPI_SYSTEM_NOTIFY, |
| 842 | acpi_processor_hotplug_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | break; |
| 844 | default: |
| 845 | break; |
| 846 | } |
| 847 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 848 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | } |
| 850 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 851 | 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] | 852 | { |
| 853 | ACPI_FUNCTION_TRACE("acpi_processor_hotadd_init"); |
| 854 | |
| 855 | if (!is_processor_present(handle)) { |
| 856 | return_VALUE(AE_ERROR); |
| 857 | } |
| 858 | |
| 859 | if (acpi_map_lsapic(handle, p_cpu)) |
| 860 | return_VALUE(AE_ERROR); |
| 861 | |
| 862 | if (arch_register_cpu(*p_cpu)) { |
| 863 | acpi_unmap_lsapic(*p_cpu); |
| 864 | return_VALUE(AE_ERROR); |
| 865 | } |
| 866 | |
| 867 | return_VALUE(AE_OK); |
| 868 | } |
| 869 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 870 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | { |
| 872 | if (cpu_online(pr->id)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 873 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | } |
| 875 | arch_unregister_cpu(pr->id); |
| 876 | acpi_unmap_lsapic(pr->id); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 877 | return (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | } |
| 879 | #else |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 880 | 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] | 881 | { |
| 882 | return AE_ERROR; |
| 883 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 884 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 886 | return (-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | } |
| 888 | #endif |
| 889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | static |
| 891 | void acpi_processor_install_hotplug_notify(void) |
| 892 | { |
| 893 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 894 | int action = INSTALL_NOTIFY_HANDLER; |
| 895 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 896 | ACPI_ROOT_OBJECT, |
| 897 | ACPI_UINT32_MAX, |
| 898 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | #endif |
| 900 | } |
| 901 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | static |
| 903 | void acpi_processor_uninstall_hotplug_notify(void) |
| 904 | { |
| 905 | #ifdef CONFIG_ACPI_HOTPLUG_CPU |
| 906 | int action = UNINSTALL_NOTIFY_HANDLER; |
| 907 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 908 | ACPI_ROOT_OBJECT, |
| 909 | ACPI_UINT32_MAX, |
| 910 | processor_walk_namespace_cb, &action, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | #endif |
| 912 | } |
| 913 | |
| 914 | /* |
| 915 | * We keep the driver loaded even when ACPI is not running. |
| 916 | * This is needed for the powernow-k8 driver, that works even without |
| 917 | * ACPI, but needs symbols from this driver |
| 918 | */ |
| 919 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 920 | static int __init acpi_processor_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 922 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | |
| 924 | ACPI_FUNCTION_TRACE("acpi_processor_init"); |
| 925 | |
| 926 | memset(&processors, 0, sizeof(processors)); |
| 927 | memset(&errata, 0, sizeof(errata)); |
| 928 | |
| 929 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 930 | if (!acpi_processor_dir) |
| 931 | return_VALUE(0); |
| 932 | acpi_processor_dir->owner = THIS_MODULE; |
| 933 | |
| 934 | result = acpi_bus_register_driver(&acpi_processor_driver); |
| 935 | if (result < 0) { |
| 936 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 937 | return_VALUE(0); |
| 938 | } |
| 939 | |
| 940 | acpi_processor_install_hotplug_notify(); |
| 941 | |
| 942 | acpi_thermal_cpufreq_init(); |
| 943 | |
| 944 | acpi_processor_ppc_init(); |
| 945 | |
| 946 | return_VALUE(0); |
| 947 | } |
| 948 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 949 | static void __exit acpi_processor_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | { |
| 951 | ACPI_FUNCTION_TRACE("acpi_processor_exit"); |
| 952 | |
| 953 | acpi_processor_ppc_exit(); |
| 954 | |
| 955 | acpi_thermal_cpufreq_exit(); |
| 956 | |
| 957 | acpi_processor_uninstall_hotplug_notify(); |
| 958 | |
| 959 | acpi_bus_unregister_driver(&acpi_processor_driver); |
| 960 | |
| 961 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
| 962 | |
| 963 | return_VOID; |
| 964 | } |
| 965 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | module_init(acpi_processor_init); |
| 967 | module_exit(acpi_processor_exit); |
| 968 | |
| 969 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); |
| 970 | |
| 971 | MODULE_ALIAS("processor"); |