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1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
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 | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/pci.h> | |
1da177e4 LT |
35 | #include <linux/interrupt.h> |
36 | #include <linux/kmod.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/nmi.h> | |
ad71860a | 40 | #include <linux/acpi.h> |
1da177e4 | 41 | #include <linux/efi.h> |
df92e695 TR |
42 | #include <linux/ioport.h> |
43 | #include <linux/list.h> | |
f1241c87 MW |
44 | #include <linux/jiffies.h> |
45 | #include <linux/semaphore.h> | |
46 | ||
47 | #include <asm/io.h> | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include <acpi/acpi.h> | |
51 | #include <acpi/acpi_bus.h> | |
52 | #include <acpi/processor.h> | |
1da177e4 | 53 | |
1da177e4 | 54 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 55 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 56 | #define PREFIX "ACPI: " |
4be44fcd LB |
57 | struct acpi_os_dpc { |
58 | acpi_osd_exec_callback function; | |
59 | void *context; | |
65f27f38 | 60 | struct work_struct work; |
1da177e4 LT |
61 | }; |
62 | ||
63 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
64 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
65 | #endif | |
66 | ||
67 | #ifdef ENABLE_DEBUGGER | |
68 | #include <linux/kdb.h> | |
69 | ||
70 | /* stuff for debugger support */ | |
71 | int acpi_in_debugger; | |
72 | EXPORT_SYMBOL(acpi_in_debugger); | |
73 | ||
74 | extern char line_buf[80]; | |
4be44fcd | 75 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 LT |
76 | |
77 | static unsigned int acpi_irq_irq; | |
78 | static acpi_osd_handler acpi_irq_handler; | |
79 | static void *acpi_irq_context; | |
80 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 81 | static struct workqueue_struct *kacpi_notify_wq; |
c02256be | 82 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 83 | |
df92e695 TR |
84 | struct acpi_res_list { |
85 | resource_size_t start; | |
86 | resource_size_t end; | |
87 | acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ | |
88 | char name[5]; /* only can have a length of 4 chars, make use of this | |
89 | one instead of res->name, no need to kalloc then */ | |
90 | struct list_head resource_list; | |
91 | }; | |
92 | ||
93 | static LIST_HEAD(resource_list_head); | |
94 | static DEFINE_SPINLOCK(acpi_res_lock); | |
95 | ||
ae00d812 LB |
96 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
97 | static char osi_additional_string[OSI_STRING_LENGTH_MAX]; | |
98 | ||
d4b7dc49 | 99 | /* |
a6e0887f | 100 | * The story of _OSI(Linux) |
d4b7dc49 | 101 | * |
a6e0887f LB |
102 | * From pre-history through Linux-2.6.22, |
103 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 104 | * |
a6e0887f LB |
105 | * Unfortunately, reference BIOS writers got wind of this |
106 | * and put OSI(Linux) in their example code, quickly exposing | |
107 | * this string as ill-conceived and opening the door to | |
108 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 109 | * |
a6e0887f LB |
110 | * For example, OSI(Linux) was used on resume to re-POST a |
111 | * video card on one system, because Linux at that time | |
112 | * could not do a speedy restore in its native driver. | |
113 | * But then upon gaining quick native restore capability, | |
114 | * Linux has no way to tell the BIOS to skip the time-consuming | |
115 | * POST -- putting Linux at a permanent performance disadvantage. | |
116 | * On another system, the BIOS writer used OSI(Linux) | |
117 | * to infer native OS support for IPMI! On other systems, | |
118 | * OSI(Linux) simply got in the way of Linux claiming to | |
119 | * be compatible with other operating systems, exposing | |
120 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 121 | * |
a6e0887f LB |
122 | * So "Linux" turned out to be a really poor chose of |
123 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
124 | * |
125 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
126 | * Linux will complain on the console when it sees it, and return FALSE. |
127 | * To get Linux to return TRUE for your system will require | |
128 | * a kernel source update to add a DMI entry, | |
129 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 130 | */ |
d4b7dc49 | 131 | |
1d15d84e | 132 | static struct osi_linux { |
d4b7dc49 LB |
133 | unsigned int enable:1; |
134 | unsigned int dmi:1; | |
135 | unsigned int cmdline:1; | |
136 | unsigned int known:1; | |
a6e0887f | 137 | } osi_linux = { 0, 0, 0, 0}; |
f507654d | 138 | |
9a47cdb1 BH |
139 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
140 | unsigned int length, char *desc) | |
141 | { | |
142 | struct resource *res; | |
143 | ||
144 | if (!addr->address || !length) | |
145 | return; | |
146 | ||
eee3c859 | 147 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
9a47cdb1 | 148 | res = request_region(addr->address, length, desc); |
eee3c859 | 149 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
9a47cdb1 BH |
150 | res = request_mem_region(addr->address, length, desc); |
151 | } | |
152 | ||
153 | static int __init acpi_reserve_resources(void) | |
154 | { | |
eee3c859 | 155 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
156 | "ACPI PM1a_EVT_BLK"); |
157 | ||
eee3c859 | 158 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
159 | "ACPI PM1b_EVT_BLK"); |
160 | ||
eee3c859 | 161 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
162 | "ACPI PM1a_CNT_BLK"); |
163 | ||
eee3c859 | 164 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
165 | "ACPI PM1b_CNT_BLK"); |
166 | ||
eee3c859 LB |
167 | if (acpi_gbl_FADT.pm_timer_length == 4) |
168 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 169 | |
eee3c859 | 170 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
171 | "ACPI PM2_CNT_BLK"); |
172 | ||
173 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
174 | ||
eee3c859 LB |
175 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
176 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
177 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 178 | |
eee3c859 LB |
179 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
180 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
181 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
182 | |
183 | return 0; | |
184 | } | |
185 | device_initcall(acpi_reserve_resources); | |
186 | ||
dd272b57 | 187 | acpi_status __init acpi_os_initialize(void) |
1da177e4 LT |
188 | { |
189 | return AE_OK; | |
190 | } | |
191 | ||
4be44fcd | 192 | acpi_status acpi_os_initialize1(void) |
1da177e4 | 193 | { |
1da177e4 | 194 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
88db5e14 | 195 | kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); |
c02256be | 196 | kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug"); |
1da177e4 | 197 | BUG_ON(!kacpid_wq); |
88db5e14 | 198 | BUG_ON(!kacpi_notify_wq); |
c02256be | 199 | BUG_ON(!kacpi_hotplug_wq); |
1da177e4 LT |
200 | return AE_OK; |
201 | } | |
202 | ||
4be44fcd | 203 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
204 | { |
205 | if (acpi_irq_handler) { | |
206 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
207 | acpi_irq_handler); | |
208 | } | |
209 | ||
210 | destroy_workqueue(kacpid_wq); | |
88db5e14 | 211 | destroy_workqueue(kacpi_notify_wq); |
c02256be | 212 | destroy_workqueue(kacpi_hotplug_wq); |
1da177e4 LT |
213 | |
214 | return AE_OK; | |
215 | } | |
216 | ||
4be44fcd | 217 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
218 | { |
219 | va_list args; | |
220 | va_start(args, fmt); | |
221 | acpi_os_vprintf(fmt, args); | |
222 | va_end(args); | |
223 | } | |
4be44fcd | 224 | |
4be44fcd | 225 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
226 | { |
227 | static char buffer[512]; | |
4be44fcd | 228 | |
1da177e4 LT |
229 | vsprintf(buffer, fmt, args); |
230 | ||
231 | #ifdef ENABLE_DEBUGGER | |
232 | if (acpi_in_debugger) { | |
233 | kdb_printf("%s", buffer); | |
234 | } else { | |
4d939155 | 235 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
236 | } |
237 | #else | |
4d939155 | 238 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
239 | #endif |
240 | } | |
241 | ||
ad71860a | 242 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 LT |
243 | { |
244 | if (efi_enabled) { | |
b2c99e3c | 245 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 246 | return efi.acpi20; |
b2c99e3c | 247 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 248 | return efi.acpi; |
1da177e4 | 249 | else { |
4be44fcd LB |
250 | printk(KERN_ERR PREFIX |
251 | "System description tables not found\n"); | |
ad71860a | 252 | return 0; |
1da177e4 | 253 | } |
239665a3 LB |
254 | } else { |
255 | acpi_physical_address pa = 0; | |
256 | ||
257 | acpi_find_root_pointer(&pa); | |
258 | return pa; | |
259 | } | |
1da177e4 LT |
260 | } |
261 | ||
2fdf0741 JB |
262 | void __iomem *__init_refok |
263 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 264 | { |
9f4fd61f BH |
265 | if (phys > ULONG_MAX) { |
266 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 267 | return NULL; |
1da177e4 | 268 | } |
ad71860a AS |
269 | if (acpi_gbl_permanent_mmap) |
270 | /* | |
271 | * ioremap checks to ensure this is in reserved space | |
272 | */ | |
273 | return ioremap((unsigned long)phys, size); | |
274 | else | |
275 | return __acpi_map_table((unsigned long)phys, size); | |
1da177e4 | 276 | } |
55a82ab3 | 277 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 278 | |
0d3a9cf5 | 279 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 280 | { |
7d97277b | 281 | if (acpi_gbl_permanent_mmap) |
ad71860a | 282 | iounmap(virt); |
7d97277b YL |
283 | else |
284 | __acpi_unmap_table(virt, size); | |
1da177e4 | 285 | } |
55a82ab3 | 286 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 287 | |
0d3a9cf5 | 288 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
289 | { |
290 | if (!acpi_gbl_permanent_mmap) | |
291 | __acpi_unmap_table(virt, size); | |
292 | } | |
293 | ||
1da177e4 LT |
294 | #ifdef ACPI_FUTURE_USAGE |
295 | acpi_status | |
4be44fcd | 296 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 297 | { |
4be44fcd | 298 | if (!phys || !virt) |
1da177e4 LT |
299 | return AE_BAD_PARAMETER; |
300 | ||
301 | *phys = virt_to_phys(virt); | |
302 | ||
303 | return AE_OK; | |
304 | } | |
305 | #endif | |
306 | ||
307 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
308 | ||
309 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
310 | ||
311 | acpi_status | |
4be44fcd LB |
312 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
313 | acpi_string * new_val) | |
1da177e4 LT |
314 | { |
315 | if (!init_val || !new_val) | |
316 | return AE_BAD_PARAMETER; | |
317 | ||
318 | *new_val = NULL; | |
4be44fcd | 319 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 320 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 321 | acpi_os_name); |
1da177e4 LT |
322 | *new_val = acpi_os_name; |
323 | } | |
324 | ||
325 | return AE_OK; | |
326 | } | |
327 | ||
328 | acpi_status | |
4be44fcd LB |
329 | acpi_os_table_override(struct acpi_table_header * existing_table, |
330 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
331 | { |
332 | if (!existing_table || !new_table) | |
333 | return AE_BAD_PARAMETER; | |
334 | ||
71fc47a9 MG |
335 | *new_table = NULL; |
336 | ||
1da177e4 LT |
337 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
338 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 339 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 340 | #endif |
6ed31e92 ÉP |
341 | if (*new_table != NULL) { |
342 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
343 | "this is unsafe: tainting kernel\n", | |
344 | existing_table->signature, | |
345 | existing_table->oem_table_id); | |
346 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
347 | } | |
1da177e4 LT |
348 | return AE_OK; |
349 | } | |
350 | ||
7d12e780 | 351 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 352 | { |
5229e87d LB |
353 | u32 handled; |
354 | ||
355 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
356 | ||
357 | if (handled) { | |
358 | acpi_irq_handled++; | |
359 | return IRQ_HANDLED; | |
88bea188 LB |
360 | } else { |
361 | acpi_irq_not_handled++; | |
5229e87d | 362 | return IRQ_NONE; |
88bea188 | 363 | } |
1da177e4 LT |
364 | } |
365 | ||
366 | acpi_status | |
4be44fcd LB |
367 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
368 | void *context) | |
1da177e4 LT |
369 | { |
370 | unsigned int irq; | |
371 | ||
5229e87d LB |
372 | acpi_irq_stats_init(); |
373 | ||
1da177e4 LT |
374 | /* |
375 | * Ignore the GSI from the core, and use the value in our copy of the | |
376 | * FADT. It may not be the same if an interrupt source override exists | |
377 | * for the SCI. | |
378 | */ | |
cee324b1 | 379 | gsi = acpi_gbl_FADT.sci_interrupt; |
1da177e4 LT |
380 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
381 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
382 | gsi); | |
383 | return AE_OK; | |
384 | } | |
385 | ||
386 | acpi_irq_handler = handler; | |
387 | acpi_irq_context = context; | |
dace1453 | 388 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
389 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
390 | return AE_NOT_ACQUIRED; | |
391 | } | |
392 | acpi_irq_irq = irq; | |
393 | ||
394 | return AE_OK; | |
395 | } | |
396 | ||
4be44fcd | 397 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
398 | { |
399 | if (irq) { | |
400 | free_irq(irq, acpi_irq); | |
401 | acpi_irq_handler = NULL; | |
402 | acpi_irq_irq = 0; | |
403 | } | |
404 | ||
405 | return AE_OK; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Running in interpreter thread context, safe to sleep | |
410 | */ | |
411 | ||
4be44fcd | 412 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 | 413 | { |
01a527ec | 414 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 415 | } |
4be44fcd | 416 | |
4be44fcd | 417 | void acpi_os_stall(u32 us) |
1da177e4 LT |
418 | { |
419 | while (us) { | |
420 | u32 delay = 1000; | |
421 | ||
422 | if (delay > us) | |
423 | delay = us; | |
424 | udelay(delay); | |
425 | touch_nmi_watchdog(); | |
426 | us -= delay; | |
427 | } | |
428 | } | |
4be44fcd | 429 | |
1da177e4 LT |
430 | /* |
431 | * Support ACPI 3.0 AML Timer operand | |
432 | * Returns 64-bit free-running, monotonically increasing timer | |
433 | * with 100ns granularity | |
434 | */ | |
4be44fcd | 435 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
436 | { |
437 | static u64 t; | |
438 | ||
439 | #ifdef CONFIG_HPET | |
440 | /* TBD: use HPET if available */ | |
441 | #endif | |
442 | ||
443 | #ifdef CONFIG_X86_PM_TIMER | |
444 | /* TBD: default to PM timer if HPET was not available */ | |
445 | #endif | |
446 | if (!t) | |
447 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
448 | ||
449 | return ++t; | |
450 | } | |
451 | ||
4be44fcd | 452 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
453 | { |
454 | u32 dummy; | |
455 | ||
456 | if (!value) | |
457 | value = &dummy; | |
458 | ||
49fbabf5 ZY |
459 | *value = 0; |
460 | if (width <= 8) { | |
4be44fcd | 461 | *(u8 *) value = inb(port); |
49fbabf5 | 462 | } else if (width <= 16) { |
4be44fcd | 463 | *(u16 *) value = inw(port); |
49fbabf5 | 464 | } else if (width <= 32) { |
4be44fcd | 465 | *(u32 *) value = inl(port); |
49fbabf5 | 466 | } else { |
1da177e4 LT |
467 | BUG(); |
468 | } | |
469 | ||
470 | return AE_OK; | |
471 | } | |
4be44fcd | 472 | |
1da177e4 LT |
473 | EXPORT_SYMBOL(acpi_os_read_port); |
474 | ||
4be44fcd | 475 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 476 | { |
49fbabf5 | 477 | if (width <= 8) { |
1da177e4 | 478 | outb(value, port); |
49fbabf5 | 479 | } else if (width <= 16) { |
1da177e4 | 480 | outw(value, port); |
49fbabf5 | 481 | } else if (width <= 32) { |
1da177e4 | 482 | outl(value, port); |
49fbabf5 | 483 | } else { |
1da177e4 LT |
484 | BUG(); |
485 | } | |
486 | ||
487 | return AE_OK; | |
488 | } | |
4be44fcd | 489 | |
1da177e4 LT |
490 | EXPORT_SYMBOL(acpi_os_write_port); |
491 | ||
492 | acpi_status | |
4be44fcd | 493 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 494 | { |
4be44fcd LB |
495 | u32 dummy; |
496 | void __iomem *virt_addr; | |
1da177e4 | 497 | |
9f4fd61f | 498 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
499 | if (!value) |
500 | value = &dummy; | |
501 | ||
502 | switch (width) { | |
503 | case 8: | |
4be44fcd | 504 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
505 | break; |
506 | case 16: | |
4be44fcd | 507 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
508 | break; |
509 | case 32: | |
4be44fcd | 510 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
511 | break; |
512 | default: | |
513 | BUG(); | |
514 | } | |
515 | ||
9f4fd61f | 516 | iounmap(virt_addr); |
1da177e4 LT |
517 | |
518 | return AE_OK; | |
519 | } | |
520 | ||
521 | acpi_status | |
4be44fcd | 522 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 523 | { |
4be44fcd | 524 | void __iomem *virt_addr; |
1da177e4 | 525 | |
9f4fd61f | 526 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
527 | |
528 | switch (width) { | |
529 | case 8: | |
530 | writeb(value, virt_addr); | |
531 | break; | |
532 | case 16: | |
533 | writew(value, virt_addr); | |
534 | break; | |
535 | case 32: | |
536 | writel(value, virt_addr); | |
537 | break; | |
538 | default: | |
539 | BUG(); | |
540 | } | |
541 | ||
9f4fd61f | 542 | iounmap(virt_addr); |
1da177e4 LT |
543 | |
544 | return AE_OK; | |
545 | } | |
546 | ||
1da177e4 | 547 | acpi_status |
4be44fcd | 548 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
10270d48 | 549 | u32 *value, u32 width) |
1da177e4 LT |
550 | { |
551 | int result, size; | |
552 | ||
553 | if (!value) | |
554 | return AE_BAD_PARAMETER; | |
555 | ||
556 | switch (width) { | |
557 | case 8: | |
558 | size = 1; | |
559 | break; | |
560 | case 16: | |
561 | size = 2; | |
562 | break; | |
563 | case 32: | |
564 | size = 4; | |
565 | break; | |
566 | default: | |
567 | return AE_ERROR; | |
568 | } | |
569 | ||
b6ce068a MW |
570 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
571 | PCI_DEVFN(pci_id->device, pci_id->function), | |
572 | reg, size, value); | |
1da177e4 LT |
573 | |
574 | return (result ? AE_ERROR : AE_OK); | |
575 | } | |
4be44fcd | 576 | |
1da177e4 | 577 | acpi_status |
4be44fcd LB |
578 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
579 | acpi_integer value, u32 width) | |
1da177e4 LT |
580 | { |
581 | int result, size; | |
582 | ||
583 | switch (width) { | |
584 | case 8: | |
585 | size = 1; | |
586 | break; | |
587 | case 16: | |
588 | size = 2; | |
589 | break; | |
590 | case 32: | |
591 | size = 4; | |
592 | break; | |
593 | default: | |
594 | return AE_ERROR; | |
595 | } | |
596 | ||
b6ce068a MW |
597 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
598 | PCI_DEVFN(pci_id->device, pci_id->function), | |
599 | reg, size, value); | |
1da177e4 LT |
600 | |
601 | return (result ? AE_ERROR : AE_OK); | |
602 | } | |
603 | ||
604 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
605 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
606 | acpi_handle chandle, /* current node */ | |
607 | struct acpi_pci_id **id, | |
608 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 609 | { |
4be44fcd LB |
610 | acpi_handle handle; |
611 | struct acpi_pci_id *pci_id = *id; | |
612 | acpi_status status; | |
27663c58 | 613 | unsigned long long temp; |
4be44fcd | 614 | acpi_object_type type; |
1da177e4 LT |
615 | |
616 | acpi_get_parent(chandle, &handle); | |
617 | if (handle != rhandle) { | |
4be44fcd LB |
618 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
619 | bus_number); | |
1da177e4 LT |
620 | |
621 | status = acpi_get_type(handle, &type); | |
4be44fcd | 622 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
623 | return; |
624 | ||
27663c58 | 625 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, |
4be44fcd | 626 | &temp); |
1da177e4 | 627 | if (ACPI_SUCCESS(status)) { |
10270d48 | 628 | u32 val; |
4be44fcd LB |
629 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
630 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
631 | |
632 | if (*is_bridge) | |
633 | pci_id->bus = *bus_number; | |
634 | ||
635 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd | 636 | status = |
10270d48 | 637 | acpi_os_read_pci_configuration(pci_id, 0x0e, &val, |
4be44fcd LB |
638 | 8); |
639 | if (ACPI_SUCCESS(status) | |
10270d48 | 640 | && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) { |
4be44fcd LB |
641 | status = |
642 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
10270d48 | 643 | &val, 8); |
1da177e4 LT |
644 | if (!ACPI_SUCCESS(status)) { |
645 | /* Certainly broken... FIX ME */ | |
646 | return; | |
647 | } | |
648 | *is_bridge = 1; | |
10270d48 | 649 | pci_id->bus = val; |
4be44fcd LB |
650 | status = |
651 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
10270d48 | 652 | &val, 8); |
1da177e4 | 653 | if (ACPI_SUCCESS(status)) { |
10270d48 | 654 | *bus_number = val; |
1da177e4 LT |
655 | } |
656 | } else | |
657 | *is_bridge = 0; | |
658 | } | |
659 | } | |
660 | } | |
661 | ||
4be44fcd LB |
662 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
663 | acpi_handle chandle, /* current node */ | |
664 | struct acpi_pci_id **id) | |
1da177e4 LT |
665 | { |
666 | int is_bridge = 1; | |
667 | u8 bus_number = (*id)->bus; | |
668 | ||
669 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
670 | } | |
671 | ||
65f27f38 | 672 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
673 | { |
674 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
675 | if (!dpc) { | |
676 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
677 | return; | |
678 | } | |
679 | ||
680 | dpc->function(dpc->context); | |
681 | kfree(dpc); | |
682 | ||
d550d98d | 683 | return; |
1da177e4 LT |
684 | } |
685 | ||
19cd847a ZR |
686 | static void acpi_os_execute_hp_deferred(struct work_struct *work) |
687 | { | |
688 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
689 | if (!dpc) { | |
690 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
691 | return; | |
692 | } | |
693 | ||
694 | acpi_os_wait_events_complete(NULL); | |
695 | ||
696 | dpc->function(dpc->context); | |
697 | kfree(dpc); | |
698 | ||
699 | return; | |
700 | } | |
701 | ||
b8d35192 AS |
702 | /******************************************************************************* |
703 | * | |
704 | * FUNCTION: acpi_os_execute | |
705 | * | |
706 | * PARAMETERS: Type - Type of the callback | |
707 | * Function - Function to be executed | |
708 | * Context - Function parameters | |
709 | * | |
710 | * RETURN: Status | |
711 | * | |
712 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
713 | * immediately executes function on a separate thread. | |
714 | * | |
715 | ******************************************************************************/ | |
716 | ||
19cd847a ZR |
717 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
718 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 719 | { |
4be44fcd LB |
720 | acpi_status status = AE_OK; |
721 | struct acpi_os_dpc *dpc; | |
17bc54ee | 722 | struct workqueue_struct *queue; |
c02256be | 723 | work_func_t func; |
19cd847a | 724 | int ret; |
72945b2b LB |
725 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
726 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
727 | function, context)); | |
1da177e4 LT |
728 | |
729 | if (!function) | |
88db5e14 | 730 | return AE_BAD_PARAMETER; |
72945b2b | 731 | |
1da177e4 LT |
732 | /* |
733 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 734 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
735 | * way that allows us to also free its memory inside the callee. |
736 | * Because we may want to schedule several tasks with different | |
737 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 738 | * having a static work_struct. |
1da177e4 | 739 | */ |
72945b2b | 740 | |
65f27f38 | 741 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 742 | if (!dpc) |
889c78be | 743 | return AE_NO_MEMORY; |
b976fe19 | 744 | |
1da177e4 LT |
745 | dpc->function = function; |
746 | dpc->context = context; | |
b976fe19 | 747 | |
c02256be ZR |
748 | /* |
749 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
750 | * because the hotplug code may call driver .remove() functions, | |
751 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
752 | * to flush these workqueues. | |
753 | */ | |
754 | queue = hp ? kacpi_hotplug_wq : | |
755 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
756 | func = hp ? acpi_os_execute_hp_deferred : acpi_os_execute_deferred; | |
757 | INIT_WORK(&dpc->work, func); | |
758 | ret = queue_work(queue, &dpc->work); | |
19cd847a ZR |
759 | |
760 | if (!ret) { | |
55ac9a01 LM |
761 | printk(KERN_ERR PREFIX |
762 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
763 | status = AE_ERROR; |
764 | kfree(dpc); | |
1da177e4 | 765 | } |
889c78be | 766 | return status; |
1da177e4 | 767 | } |
4be44fcd | 768 | |
19cd847a ZR |
769 | acpi_status acpi_os_execute(acpi_execute_type type, |
770 | acpi_osd_exec_callback function, void *context) | |
771 | { | |
772 | return __acpi_os_execute(type, function, context, 0); | |
773 | } | |
b8d35192 | 774 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 775 | |
19cd847a ZR |
776 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
777 | void *context) | |
778 | { | |
779 | return __acpi_os_execute(0, function, context, 1); | |
780 | } | |
781 | ||
4be44fcd | 782 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
783 | { |
784 | flush_workqueue(kacpid_wq); | |
2f67a069 | 785 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 786 | } |
4be44fcd | 787 | |
1da177e4 LT |
788 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
789 | ||
790 | /* | |
791 | * Allocate the memory for a spinlock and initialize it. | |
792 | */ | |
967440e3 | 793 | acpi_status acpi_os_create_lock(acpi_spinlock * handle) |
1da177e4 | 794 | { |
967440e3 | 795 | spin_lock_init(*handle); |
1da177e4 | 796 | |
d550d98d | 797 | return AE_OK; |
1da177e4 LT |
798 | } |
799 | ||
1da177e4 LT |
800 | /* |
801 | * Deallocate the memory for a spinlock. | |
802 | */ | |
967440e3 | 803 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 804 | { |
d550d98d | 805 | return; |
1da177e4 LT |
806 | } |
807 | ||
1da177e4 | 808 | acpi_status |
4be44fcd | 809 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 810 | { |
4be44fcd | 811 | struct semaphore *sem = NULL; |
1da177e4 | 812 | |
1da177e4 LT |
813 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
814 | if (!sem) | |
d550d98d | 815 | return AE_NO_MEMORY; |
1da177e4 LT |
816 | memset(sem, 0, sizeof(struct semaphore)); |
817 | ||
818 | sema_init(sem, initial_units); | |
819 | ||
4be44fcd | 820 | *handle = (acpi_handle *) sem; |
1da177e4 | 821 | |
4be44fcd LB |
822 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
823 | *handle, initial_units)); | |
1da177e4 | 824 | |
d550d98d | 825 | return AE_OK; |
1da177e4 | 826 | } |
1da177e4 | 827 | |
1da177e4 LT |
828 | /* |
829 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
830 | * 'delete_semaphore()' function -- may result in an invalid | |
831 | * pointer dereference for non-synchronized consumers. Should | |
832 | * we at least check for blocked threads and signal/cancel them? | |
833 | */ | |
834 | ||
4be44fcd | 835 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 836 | { |
4be44fcd | 837 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 838 | |
1da177e4 | 839 | if (!sem) |
d550d98d | 840 | return AE_BAD_PARAMETER; |
1da177e4 | 841 | |
4be44fcd | 842 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 843 | |
f1241c87 | 844 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 845 | kfree(sem); |
4be44fcd | 846 | sem = NULL; |
1da177e4 | 847 | |
d550d98d | 848 | return AE_OK; |
1da177e4 | 849 | } |
1da177e4 | 850 | |
1da177e4 | 851 | /* |
1da177e4 LT |
852 | * TODO: Support for units > 1? |
853 | */ | |
4be44fcd | 854 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 855 | { |
4be44fcd LB |
856 | acpi_status status = AE_OK; |
857 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 858 | long jiffies; |
4be44fcd | 859 | int ret = 0; |
1da177e4 | 860 | |
1da177e4 | 861 | if (!sem || (units < 1)) |
d550d98d | 862 | return AE_BAD_PARAMETER; |
1da177e4 LT |
863 | |
864 | if (units > 1) | |
d550d98d | 865 | return AE_SUPPORT; |
1da177e4 | 866 | |
4be44fcd LB |
867 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
868 | handle, units, timeout)); | |
1da177e4 | 869 | |
f1241c87 MW |
870 | if (timeout == ACPI_WAIT_FOREVER) |
871 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
872 | else | |
873 | jiffies = msecs_to_jiffies(timeout); | |
874 | ||
875 | ret = down_timeout(sem, jiffies); | |
876 | if (ret) | |
877 | status = AE_TIME; | |
1da177e4 LT |
878 | |
879 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 880 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 881 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
882 | handle, units, timeout, |
883 | acpi_format_exception(status))); | |
884 | } else { | |
885 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 886 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 887 | units, timeout)); |
1da177e4 LT |
888 | } |
889 | ||
d550d98d | 890 | return status; |
1da177e4 | 891 | } |
1da177e4 | 892 | |
1da177e4 LT |
893 | /* |
894 | * TODO: Support for units > 1? | |
895 | */ | |
4be44fcd | 896 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 897 | { |
4be44fcd | 898 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 899 | |
1da177e4 | 900 | if (!sem || (units < 1)) |
d550d98d | 901 | return AE_BAD_PARAMETER; |
1da177e4 LT |
902 | |
903 | if (units > 1) | |
d550d98d | 904 | return AE_SUPPORT; |
1da177e4 | 905 | |
4be44fcd LB |
906 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
907 | units)); | |
1da177e4 LT |
908 | |
909 | up(sem); | |
910 | ||
d550d98d | 911 | return AE_OK; |
1da177e4 | 912 | } |
4be44fcd | 913 | |
1da177e4 | 914 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 915 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
916 | { |
917 | ||
918 | #ifdef ENABLE_DEBUGGER | |
919 | if (acpi_in_debugger) { | |
920 | u32 chars; | |
921 | ||
922 | kdb_read(buffer, sizeof(line_buf)); | |
923 | ||
924 | /* remove the CR kdb includes */ | |
925 | chars = strlen(buffer) - 1; | |
926 | buffer[chars] = '\0'; | |
927 | } | |
928 | #endif | |
929 | ||
930 | return 0; | |
931 | } | |
4be44fcd | 932 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 933 | |
4be44fcd | 934 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 935 | { |
4be44fcd | 936 | switch (function) { |
1da177e4 LT |
937 | case ACPI_SIGNAL_FATAL: |
938 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
939 | break; | |
940 | case ACPI_SIGNAL_BREAKPOINT: | |
941 | /* | |
942 | * AML Breakpoint | |
943 | * ACPI spec. says to treat it as a NOP unless | |
944 | * you are debugging. So if/when we integrate | |
945 | * AML debugger into the kernel debugger its | |
946 | * hook will go here. But until then it is | |
947 | * not useful to print anything on breakpoints. | |
948 | */ | |
949 | break; | |
950 | default: | |
951 | break; | |
952 | } | |
953 | ||
954 | return AE_OK; | |
955 | } | |
4be44fcd | 956 | |
4be44fcd | 957 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
958 | { |
959 | char *p = acpi_os_name; | |
4be44fcd | 960 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
961 | |
962 | if (!str || !*str) | |
963 | return 0; | |
964 | ||
965 | for (; count-- && str && *str; str++) { | |
966 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
967 | *p++ = *str; | |
968 | else if (*str == '\'' || *str == '"') | |
969 | continue; | |
970 | else | |
971 | break; | |
972 | } | |
973 | *p = 0; | |
974 | ||
975 | return 1; | |
4be44fcd | 976 | |
1da177e4 LT |
977 | } |
978 | ||
979 | __setup("acpi_os_name=", acpi_os_name_setup); | |
980 | ||
d4b7dc49 LB |
981 | static void __init set_osi_linux(unsigned int enable) |
982 | { | |
983 | if (osi_linux.enable != enable) { | |
984 | osi_linux.enable = enable; | |
985 | printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", | |
986 | enable ? "Add": "Delet"); | |
987 | } | |
988 | return; | |
989 | } | |
990 | ||
991 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
992 | { | |
993 | osi_linux.cmdline = 1; /* cmdline set the default */ | |
994 | set_osi_linux(enable); | |
995 | ||
996 | return; | |
997 | } | |
998 | ||
999 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1000 | { | |
1001 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ | |
1002 | ||
1003 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); | |
1004 | ||
1005 | if (enable == -1) | |
1006 | return; | |
1007 | ||
1008 | osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ | |
f507654d | 1009 | |
d4b7dc49 | 1010 | set_osi_linux(enable); |
f507654d | 1011 | |
f507654d LB |
1012 | return; |
1013 | } | |
1014 | ||
1da177e4 | 1015 | /* |
ae00d812 LB |
1016 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1017 | * | |
1da177e4 | 1018 | * empty string disables _OSI |
ae00d812 LB |
1019 | * string starting with '!' disables that string |
1020 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1021 | */ |
46c1fbdb | 1022 | int __init acpi_osi_setup(char *str) |
1da177e4 LT |
1023 | { |
1024 | if (str == NULL || *str == '\0') { | |
1025 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1026 | acpi_gbl_create_osi_method = FALSE; | |
aa2e09da | 1027 | } else if (!strcmp("!Linux", str)) { |
d4b7dc49 | 1028 | acpi_cmdline_osi_linux(0); /* !enable */ |
ae00d812 LB |
1029 | } else if (*str == '!') { |
1030 | if (acpi_osi_invalidate(++str) == AE_OK) | |
1031 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
f507654d | 1032 | } else if (!strcmp("Linux", str)) { |
d4b7dc49 | 1033 | acpi_cmdline_osi_linux(1); /* enable */ |
ae00d812 LB |
1034 | } else if (*osi_additional_string == '\0') { |
1035 | strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); | |
1036 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | return 1; | |
1040 | } | |
1041 | ||
1042 | __setup("acpi_osi=", acpi_osi_setup); | |
1043 | ||
1044 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1045 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1046 | { |
1047 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1048 | ||
1049 | acpi_gbl_all_methods_serialized = TRUE; | |
1050 | ||
1051 | return 1; | |
1052 | } | |
1053 | ||
1054 | __setup("acpi_serialize", acpi_serialize_setup); | |
1055 | ||
1056 | /* | |
1057 | * Wake and Run-Time GPES are expected to be separate. | |
1058 | * We disable wake-GPEs at run-time to prevent spurious | |
1059 | * interrupts. | |
1060 | * | |
1061 | * However, if a system exists that shares Wake and | |
1062 | * Run-time events on the same GPE this flag is available | |
1063 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1064 | */ | |
4be44fcd | 1065 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1066 | { |
1067 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1068 | ||
1069 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1070 | ||
1071 | return 1; | |
1072 | } | |
1073 | ||
1074 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1075 | ||
df92e695 TR |
1076 | /* Check of resource interference between native drivers and ACPI |
1077 | * OperationRegions (SystemIO and System Memory only). | |
1078 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1079 | * in arbitrary AML code and can interfere with legacy drivers. | |
1080 | * acpi_enforce_resources= can be set to: | |
1081 | * | |
7e90560c | 1082 | * - strict (default) (2) |
df92e695 | 1083 | * -> further driver trying to access the resources will not load |
7e90560c | 1084 | * - lax (1) |
df92e695 TR |
1085 | * -> further driver trying to access the resources will load, but you |
1086 | * get a system message that something might go wrong... | |
1087 | * | |
1088 | * - no (0) | |
1089 | * -> ACPI Operation Region resources will not be registered | |
1090 | * | |
1091 | */ | |
1092 | #define ENFORCE_RESOURCES_STRICT 2 | |
1093 | #define ENFORCE_RESOURCES_LAX 1 | |
1094 | #define ENFORCE_RESOURCES_NO 0 | |
1095 | ||
7e90560c | 1096 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1097 | |
1098 | static int __init acpi_enforce_resources_setup(char *str) | |
1099 | { | |
1100 | if (str == NULL || *str == '\0') | |
1101 | return 0; | |
1102 | ||
1103 | if (!strcmp("strict", str)) | |
1104 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1105 | else if (!strcmp("lax", str)) | |
1106 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1107 | else if (!strcmp("no", str)) | |
1108 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1109 | ||
1110 | return 1; | |
1111 | } | |
1112 | ||
1113 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1114 | ||
1115 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1116 | * drivers */ | |
443dea72 | 1117 | int acpi_check_resource_conflict(struct resource *res) |
df92e695 TR |
1118 | { |
1119 | struct acpi_res_list *res_list_elem; | |
1120 | int ioport; | |
1121 | int clash = 0; | |
1122 | ||
1123 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1124 | return 0; | |
1125 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1126 | return 0; | |
1127 | ||
1128 | ioport = res->flags & IORESOURCE_IO; | |
1129 | ||
1130 | spin_lock(&acpi_res_lock); | |
1131 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1132 | resource_list) { | |
1133 | if (ioport && (res_list_elem->resource_type | |
1134 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1135 | continue; | |
1136 | if (!ioport && (res_list_elem->resource_type | |
1137 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1138 | continue; | |
1139 | ||
1140 | if (res->end < res_list_elem->start | |
1141 | || res_list_elem->end < res->start) | |
1142 | continue; | |
1143 | clash = 1; | |
1144 | break; | |
1145 | } | |
1146 | spin_unlock(&acpi_res_lock); | |
1147 | ||
1148 | if (clash) { | |
1149 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
bd12935f | 1150 | printk("%sACPI: %s resource %s [0x%llx-0x%llx]" |
df92e695 TR |
1151 | " conflicts with ACPI region %s" |
1152 | " [0x%llx-0x%llx]\n", | |
1153 | acpi_enforce_resources == ENFORCE_RESOURCES_LAX | |
1154 | ? KERN_WARNING : KERN_ERR, | |
1155 | ioport ? "I/O" : "Memory", res->name, | |
1156 | (long long) res->start, (long long) res->end, | |
1157 | res_list_elem->name, | |
1158 | (long long) res_list_elem->start, | |
1159 | (long long) res_list_elem->end); | |
1160 | printk(KERN_INFO "ACPI: Device needs an ACPI driver\n"); | |
1161 | } | |
1162 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1163 | return -EBUSY; | |
1164 | } | |
1165 | return 0; | |
1166 | } | |
443dea72 | 1167 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1168 | |
1169 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1170 | const char *name) | |
1171 | { | |
1172 | struct resource res = { | |
1173 | .start = start, | |
1174 | .end = start + n - 1, | |
1175 | .name = name, | |
1176 | .flags = IORESOURCE_IO, | |
1177 | }; | |
1178 | ||
1179 | return acpi_check_resource_conflict(&res); | |
1180 | } | |
1181 | EXPORT_SYMBOL(acpi_check_region); | |
1182 | ||
1183 | int acpi_check_mem_region(resource_size_t start, resource_size_t n, | |
1184 | const char *name) | |
1185 | { | |
1186 | struct resource res = { | |
1187 | .start = start, | |
1188 | .end = start + n - 1, | |
1189 | .name = name, | |
1190 | .flags = IORESOURCE_MEM, | |
1191 | }; | |
1192 | ||
1193 | return acpi_check_resource_conflict(&res); | |
1194 | ||
1195 | } | |
1196 | EXPORT_SYMBOL(acpi_check_mem_region); | |
1197 | ||
73459f73 RM |
1198 | /* |
1199 | * Acquire a spinlock. | |
1200 | * | |
1201 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1202 | */ |
1203 | ||
967440e3 | 1204 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1205 | { |
b8e4d893 | 1206 | acpi_cpu_flags flags; |
967440e3 | 1207 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1208 | return flags; |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * Release a spinlock. See above. | |
1213 | */ | |
1214 | ||
967440e3 | 1215 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1216 | { |
967440e3 | 1217 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1218 | } |
1219 | ||
73459f73 RM |
1220 | #ifndef ACPI_USE_LOCAL_CACHE |
1221 | ||
1222 | /******************************************************************************* | |
1223 | * | |
1224 | * FUNCTION: acpi_os_create_cache | |
1225 | * | |
b229cf92 BM |
1226 | * PARAMETERS: name - Ascii name for the cache |
1227 | * size - Size of each cached object | |
1228 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1229 | * cache - Where the new cache object is returned | |
73459f73 | 1230 | * |
b229cf92 | 1231 | * RETURN: status |
73459f73 RM |
1232 | * |
1233 | * DESCRIPTION: Create a cache object | |
1234 | * | |
1235 | ******************************************************************************/ | |
1236 | ||
1237 | acpi_status | |
4be44fcd | 1238 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1239 | { |
20c2df83 | 1240 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1241 | if (*cache == NULL) |
b229cf92 BM |
1242 | return AE_ERROR; |
1243 | else | |
1244 | return AE_OK; | |
73459f73 RM |
1245 | } |
1246 | ||
1247 | /******************************************************************************* | |
1248 | * | |
1249 | * FUNCTION: acpi_os_purge_cache | |
1250 | * | |
1251 | * PARAMETERS: Cache - Handle to cache object | |
1252 | * | |
1253 | * RETURN: Status | |
1254 | * | |
1255 | * DESCRIPTION: Free all objects within the requested cache. | |
1256 | * | |
1257 | ******************************************************************************/ | |
1258 | ||
4be44fcd | 1259 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1260 | { |
50dd0969 | 1261 | kmem_cache_shrink(cache); |
4be44fcd | 1262 | return (AE_OK); |
73459f73 RM |
1263 | } |
1264 | ||
1265 | /******************************************************************************* | |
1266 | * | |
1267 | * FUNCTION: acpi_os_delete_cache | |
1268 | * | |
1269 | * PARAMETERS: Cache - Handle to cache object | |
1270 | * | |
1271 | * RETURN: Status | |
1272 | * | |
1273 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1274 | * cache object. | |
1275 | * | |
1276 | ******************************************************************************/ | |
1277 | ||
4be44fcd | 1278 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1279 | { |
1a1d92c1 | 1280 | kmem_cache_destroy(cache); |
4be44fcd | 1281 | return (AE_OK); |
73459f73 RM |
1282 | } |
1283 | ||
1284 | /******************************************************************************* | |
1285 | * | |
1286 | * FUNCTION: acpi_os_release_object | |
1287 | * | |
1288 | * PARAMETERS: Cache - Handle to cache object | |
1289 | * Object - The object to be released | |
1290 | * | |
1291 | * RETURN: None | |
1292 | * | |
1293 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1294 | * the object is deleted. | |
1295 | * | |
1296 | ******************************************************************************/ | |
1297 | ||
4be44fcd | 1298 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1299 | { |
4be44fcd LB |
1300 | kmem_cache_free(cache, object); |
1301 | return (AE_OK); | |
73459f73 RM |
1302 | } |
1303 | ||
b229cf92 BM |
1304 | /****************************************************************************** |
1305 | * | |
1306 | * FUNCTION: acpi_os_validate_interface | |
1307 | * | |
1308 | * PARAMETERS: interface - Requested interface to be validated | |
1309 | * | |
1310 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1311 | * | |
1312 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1313 | * host. Strings originate from an AML call to the _OSI method. | |
1314 | * | |
1315 | *****************************************************************************/ | |
1316 | ||
1317 | acpi_status | |
1318 | acpi_os_validate_interface (char *interface) | |
1319 | { | |
ae00d812 LB |
1320 | if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) |
1321 | return AE_OK; | |
f507654d | 1322 | if (!strcmp("Linux", interface)) { |
d4b7dc49 | 1323 | |
f40cd6fd | 1324 | printk(KERN_NOTICE PREFIX |
d4b7dc49 LB |
1325 | "BIOS _OSI(Linux) query %s%s\n", |
1326 | osi_linux.enable ? "honored" : "ignored", | |
1327 | osi_linux.cmdline ? " via cmdline" : | |
1328 | osi_linux.dmi ? " via DMI" : ""); | |
1329 | ||
d4b7dc49 | 1330 | if (osi_linux.enable) |
f507654d LB |
1331 | return AE_OK; |
1332 | } | |
ae00d812 | 1333 | return AE_SUPPORT; |
b229cf92 BM |
1334 | } |
1335 | ||
b229cf92 BM |
1336 | /****************************************************************************** |
1337 | * | |
1338 | * FUNCTION: acpi_os_validate_address | |
1339 | * | |
1340 | * PARAMETERS: space_id - ACPI space ID | |
1341 | * address - Physical address | |
1342 | * length - Address length | |
1343 | * | |
1344 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1345 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1346 | * | |
1347 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1348 | * the addresses accessed by AML operation regions. | |
1349 | * | |
1350 | *****************************************************************************/ | |
1351 | ||
1352 | acpi_status | |
1353 | acpi_os_validate_address ( | |
1354 | u8 space_id, | |
1355 | acpi_physical_address address, | |
df92e695 TR |
1356 | acpi_size length, |
1357 | char *name) | |
b229cf92 | 1358 | { |
df92e695 TR |
1359 | struct acpi_res_list *res; |
1360 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1361 | return AE_OK; | |
b229cf92 | 1362 | |
df92e695 TR |
1363 | switch (space_id) { |
1364 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1365 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
1366 | /* Only interference checks against SystemIO and SytemMemory | |
1367 | are needed */ | |
1368 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1369 | if (!res) | |
1370 | return AE_OK; | |
1371 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1372 | strlcpy(res->name, name, 5); | |
1373 | res->start = address; | |
1374 | res->end = address + length - 1; | |
1375 | res->resource_type = space_id; | |
1376 | spin_lock(&acpi_res_lock); | |
1377 | list_add(&res->resource_list, &resource_list_head); | |
1378 | spin_unlock(&acpi_res_lock); | |
1379 | pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, " | |
1380 | "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
1381 | ? "SystemIO" : "System Memory", | |
1382 | (unsigned long long)res->start, | |
1383 | (unsigned long long)res->end, | |
1384 | res->name); | |
1385 | break; | |
1386 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1387 | case ACPI_ADR_SPACE_EC: | |
1388 | case ACPI_ADR_SPACE_SMBUS: | |
1389 | case ACPI_ADR_SPACE_CMOS: | |
1390 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1391 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1392 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1393 | break; | |
1394 | } | |
1395 | return AE_OK; | |
b229cf92 BM |
1396 | } |
1397 | ||
73459f73 | 1398 | #endif |