]>
Commit | Line | Data |
---|---|---|
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; |
9ac61856 | 61 | int wait; |
1da177e4 LT |
62 | }; |
63 | ||
64 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
65 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
66 | #endif | |
67 | ||
68 | #ifdef ENABLE_DEBUGGER | |
69 | #include <linux/kdb.h> | |
70 | ||
71 | /* stuff for debugger support */ | |
72 | int acpi_in_debugger; | |
73 | EXPORT_SYMBOL(acpi_in_debugger); | |
74 | ||
75 | extern char line_buf[80]; | |
4be44fcd | 76 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 LT |
77 | |
78 | static unsigned int acpi_irq_irq; | |
79 | static acpi_osd_handler acpi_irq_handler; | |
80 | static void *acpi_irq_context; | |
81 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 82 | static struct workqueue_struct *kacpi_notify_wq; |
c02256be | 83 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 84 | |
df92e695 TR |
85 | struct acpi_res_list { |
86 | resource_size_t start; | |
87 | resource_size_t end; | |
88 | acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ | |
89 | char name[5]; /* only can have a length of 4 chars, make use of this | |
90 | one instead of res->name, no need to kalloc then */ | |
91 | struct list_head resource_list; | |
a5fe1a03 | 92 | int count; |
df92e695 TR |
93 | }; |
94 | ||
95 | static LIST_HEAD(resource_list_head); | |
96 | static DEFINE_SPINLOCK(acpi_res_lock); | |
97 | ||
ae00d812 LB |
98 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
99 | static char osi_additional_string[OSI_STRING_LENGTH_MAX]; | |
100 | ||
d4b7dc49 | 101 | /* |
a6e0887f | 102 | * The story of _OSI(Linux) |
d4b7dc49 | 103 | * |
a6e0887f LB |
104 | * From pre-history through Linux-2.6.22, |
105 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 106 | * |
a6e0887f LB |
107 | * Unfortunately, reference BIOS writers got wind of this |
108 | * and put OSI(Linux) in their example code, quickly exposing | |
109 | * this string as ill-conceived and opening the door to | |
110 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 111 | * |
a6e0887f LB |
112 | * For example, OSI(Linux) was used on resume to re-POST a |
113 | * video card on one system, because Linux at that time | |
114 | * could not do a speedy restore in its native driver. | |
115 | * But then upon gaining quick native restore capability, | |
116 | * Linux has no way to tell the BIOS to skip the time-consuming | |
117 | * POST -- putting Linux at a permanent performance disadvantage. | |
118 | * On another system, the BIOS writer used OSI(Linux) | |
119 | * to infer native OS support for IPMI! On other systems, | |
120 | * OSI(Linux) simply got in the way of Linux claiming to | |
121 | * be compatible with other operating systems, exposing | |
122 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 123 | * |
a6e0887f LB |
124 | * So "Linux" turned out to be a really poor chose of |
125 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
126 | * |
127 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
128 | * Linux will complain on the console when it sees it, and return FALSE. |
129 | * To get Linux to return TRUE for your system will require | |
130 | * a kernel source update to add a DMI entry, | |
131 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 132 | */ |
d4b7dc49 | 133 | |
1d15d84e | 134 | static struct osi_linux { |
d4b7dc49 LB |
135 | unsigned int enable:1; |
136 | unsigned int dmi:1; | |
137 | unsigned int cmdline:1; | |
138 | unsigned int known:1; | |
a6e0887f | 139 | } osi_linux = { 0, 0, 0, 0}; |
f507654d | 140 | |
9a47cdb1 BH |
141 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
142 | unsigned int length, char *desc) | |
143 | { | |
9a47cdb1 BH |
144 | if (!addr->address || !length) |
145 | return; | |
146 | ||
cfa806f0 | 147 | /* Resources are never freed */ |
eee3c859 | 148 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
cfa806f0 | 149 | request_region(addr->address, length, desc); |
eee3c859 | 150 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
cfa806f0 | 151 | request_mem_region(addr->address, length, desc); |
9a47cdb1 BH |
152 | } |
153 | ||
154 | static int __init acpi_reserve_resources(void) | |
155 | { | |
eee3c859 | 156 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
157 | "ACPI PM1a_EVT_BLK"); |
158 | ||
eee3c859 | 159 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
160 | "ACPI PM1b_EVT_BLK"); |
161 | ||
eee3c859 | 162 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
163 | "ACPI PM1a_CNT_BLK"); |
164 | ||
eee3c859 | 165 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
166 | "ACPI PM1b_CNT_BLK"); |
167 | ||
eee3c859 LB |
168 | if (acpi_gbl_FADT.pm_timer_length == 4) |
169 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 170 | |
eee3c859 | 171 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
172 | "ACPI PM2_CNT_BLK"); |
173 | ||
174 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
175 | ||
eee3c859 LB |
176 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
177 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
178 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 179 | |
eee3c859 LB |
180 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
181 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
182 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
183 | |
184 | return 0; | |
185 | } | |
186 | device_initcall(acpi_reserve_resources); | |
187 | ||
dd272b57 | 188 | acpi_status __init acpi_os_initialize(void) |
1da177e4 LT |
189 | { |
190 | return AE_OK; | |
191 | } | |
192 | ||
4be44fcd | 193 | acpi_status acpi_os_initialize1(void) |
1da177e4 | 194 | { |
8fec62b2 TH |
195 | kacpid_wq = create_workqueue("kacpid"); |
196 | kacpi_notify_wq = create_workqueue("kacpi_notify"); | |
197 | kacpi_hotplug_wq = create_workqueue("kacpi_hotplug"); | |
1da177e4 | 198 | BUG_ON(!kacpid_wq); |
88db5e14 | 199 | BUG_ON(!kacpi_notify_wq); |
c02256be | 200 | BUG_ON(!kacpi_hotplug_wq); |
1da177e4 LT |
201 | return AE_OK; |
202 | } | |
203 | ||
4be44fcd | 204 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
205 | { |
206 | if (acpi_irq_handler) { | |
207 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
208 | acpi_irq_handler); | |
209 | } | |
210 | ||
211 | destroy_workqueue(kacpid_wq); | |
88db5e14 | 212 | destroy_workqueue(kacpi_notify_wq); |
c02256be | 213 | destroy_workqueue(kacpi_hotplug_wq); |
1da177e4 LT |
214 | |
215 | return AE_OK; | |
216 | } | |
217 | ||
4be44fcd | 218 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
219 | { |
220 | va_list args; | |
221 | va_start(args, fmt); | |
222 | acpi_os_vprintf(fmt, args); | |
223 | va_end(args); | |
224 | } | |
4be44fcd | 225 | |
4be44fcd | 226 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
227 | { |
228 | static char buffer[512]; | |
4be44fcd | 229 | |
1da177e4 LT |
230 | vsprintf(buffer, fmt, args); |
231 | ||
232 | #ifdef ENABLE_DEBUGGER | |
233 | if (acpi_in_debugger) { | |
234 | kdb_printf("%s", buffer); | |
235 | } else { | |
4d939155 | 236 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
237 | } |
238 | #else | |
4d939155 | 239 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
240 | #endif |
241 | } | |
242 | ||
ad71860a | 243 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 LT |
244 | { |
245 | if (efi_enabled) { | |
b2c99e3c | 246 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 247 | return efi.acpi20; |
b2c99e3c | 248 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 249 | return efi.acpi; |
1da177e4 | 250 | else { |
4be44fcd LB |
251 | printk(KERN_ERR PREFIX |
252 | "System description tables not found\n"); | |
ad71860a | 253 | return 0; |
1da177e4 | 254 | } |
239665a3 LB |
255 | } else { |
256 | acpi_physical_address pa = 0; | |
257 | ||
258 | acpi_find_root_pointer(&pa); | |
259 | return pa; | |
260 | } | |
1da177e4 LT |
261 | } |
262 | ||
2fdf0741 JB |
263 | void __iomem *__init_refok |
264 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 265 | { |
9f4fd61f BH |
266 | if (phys > ULONG_MAX) { |
267 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 268 | return NULL; |
1da177e4 | 269 | } |
ad71860a AS |
270 | if (acpi_gbl_permanent_mmap) |
271 | /* | |
272 | * ioremap checks to ensure this is in reserved space | |
273 | */ | |
274 | return ioremap((unsigned long)phys, size); | |
275 | else | |
276 | return __acpi_map_table((unsigned long)phys, size); | |
1da177e4 | 277 | } |
55a82ab3 | 278 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 279 | |
0d3a9cf5 | 280 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 281 | { |
7d97277b | 282 | if (acpi_gbl_permanent_mmap) |
ad71860a | 283 | iounmap(virt); |
7d97277b YL |
284 | else |
285 | __acpi_unmap_table(virt, size); | |
1da177e4 | 286 | } |
55a82ab3 | 287 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 288 | |
0d3a9cf5 | 289 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
290 | { |
291 | if (!acpi_gbl_permanent_mmap) | |
292 | __acpi_unmap_table(virt, size); | |
293 | } | |
294 | ||
1da177e4 LT |
295 | #ifdef ACPI_FUTURE_USAGE |
296 | acpi_status | |
4be44fcd | 297 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 298 | { |
4be44fcd | 299 | if (!phys || !virt) |
1da177e4 LT |
300 | return AE_BAD_PARAMETER; |
301 | ||
302 | *phys = virt_to_phys(virt); | |
303 | ||
304 | return AE_OK; | |
305 | } | |
306 | #endif | |
307 | ||
308 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
309 | ||
310 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
311 | ||
312 | acpi_status | |
4be44fcd LB |
313 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
314 | acpi_string * new_val) | |
1da177e4 LT |
315 | { |
316 | if (!init_val || !new_val) | |
317 | return AE_BAD_PARAMETER; | |
318 | ||
319 | *new_val = NULL; | |
4be44fcd | 320 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 321 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 322 | acpi_os_name); |
1da177e4 LT |
323 | *new_val = acpi_os_name; |
324 | } | |
325 | ||
326 | return AE_OK; | |
327 | } | |
328 | ||
329 | acpi_status | |
4be44fcd LB |
330 | acpi_os_table_override(struct acpi_table_header * existing_table, |
331 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
332 | { |
333 | if (!existing_table || !new_table) | |
334 | return AE_BAD_PARAMETER; | |
335 | ||
71fc47a9 MG |
336 | *new_table = NULL; |
337 | ||
1da177e4 LT |
338 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
339 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 340 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 341 | #endif |
6ed31e92 ÉP |
342 | if (*new_table != NULL) { |
343 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
344 | "this is unsafe: tainting kernel\n", | |
345 | existing_table->signature, | |
346 | existing_table->oem_table_id); | |
347 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
348 | } | |
1da177e4 LT |
349 | return AE_OK; |
350 | } | |
351 | ||
7d12e780 | 352 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 353 | { |
5229e87d LB |
354 | u32 handled; |
355 | ||
356 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
357 | ||
358 | if (handled) { | |
359 | acpi_irq_handled++; | |
360 | return IRQ_HANDLED; | |
88bea188 LB |
361 | } else { |
362 | acpi_irq_not_handled++; | |
5229e87d | 363 | return IRQ_NONE; |
88bea188 | 364 | } |
1da177e4 LT |
365 | } |
366 | ||
367 | acpi_status | |
4be44fcd LB |
368 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
369 | void *context) | |
1da177e4 LT |
370 | { |
371 | unsigned int irq; | |
372 | ||
5229e87d LB |
373 | acpi_irq_stats_init(); |
374 | ||
1da177e4 LT |
375 | /* |
376 | * Ignore the GSI from the core, and use the value in our copy of the | |
377 | * FADT. It may not be the same if an interrupt source override exists | |
378 | * for the SCI. | |
379 | */ | |
cee324b1 | 380 | gsi = acpi_gbl_FADT.sci_interrupt; |
1da177e4 LT |
381 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
382 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
383 | gsi); | |
384 | return AE_OK; | |
385 | } | |
386 | ||
387 | acpi_irq_handler = handler; | |
388 | acpi_irq_context = context; | |
dace1453 | 389 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
390 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
391 | return AE_NOT_ACQUIRED; | |
392 | } | |
393 | acpi_irq_irq = irq; | |
394 | ||
395 | return AE_OK; | |
396 | } | |
397 | ||
4be44fcd | 398 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
399 | { |
400 | if (irq) { | |
401 | free_irq(irq, acpi_irq); | |
402 | acpi_irq_handler = NULL; | |
403 | acpi_irq_irq = 0; | |
404 | } | |
405 | ||
406 | return AE_OK; | |
407 | } | |
408 | ||
409 | /* | |
410 | * Running in interpreter thread context, safe to sleep | |
411 | */ | |
412 | ||
439913ff | 413 | void acpi_os_sleep(u64 ms) |
1da177e4 | 414 | { |
01a527ec | 415 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 416 | } |
4be44fcd | 417 | |
4be44fcd | 418 | void acpi_os_stall(u32 us) |
1da177e4 LT |
419 | { |
420 | while (us) { | |
421 | u32 delay = 1000; | |
422 | ||
423 | if (delay > us) | |
424 | delay = us; | |
425 | udelay(delay); | |
426 | touch_nmi_watchdog(); | |
427 | us -= delay; | |
428 | } | |
429 | } | |
4be44fcd | 430 | |
1da177e4 LT |
431 | /* |
432 | * Support ACPI 3.0 AML Timer operand | |
433 | * Returns 64-bit free-running, monotonically increasing timer | |
434 | * with 100ns granularity | |
435 | */ | |
4be44fcd | 436 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
437 | { |
438 | static u64 t; | |
439 | ||
440 | #ifdef CONFIG_HPET | |
441 | /* TBD: use HPET if available */ | |
442 | #endif | |
443 | ||
444 | #ifdef CONFIG_X86_PM_TIMER | |
445 | /* TBD: default to PM timer if HPET was not available */ | |
446 | #endif | |
447 | if (!t) | |
448 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
449 | ||
450 | return ++t; | |
451 | } | |
452 | ||
4be44fcd | 453 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
454 | { |
455 | u32 dummy; | |
456 | ||
457 | if (!value) | |
458 | value = &dummy; | |
459 | ||
49fbabf5 ZY |
460 | *value = 0; |
461 | if (width <= 8) { | |
4be44fcd | 462 | *(u8 *) value = inb(port); |
49fbabf5 | 463 | } else if (width <= 16) { |
4be44fcd | 464 | *(u16 *) value = inw(port); |
49fbabf5 | 465 | } else if (width <= 32) { |
4be44fcd | 466 | *(u32 *) value = inl(port); |
49fbabf5 | 467 | } else { |
1da177e4 LT |
468 | BUG(); |
469 | } | |
470 | ||
471 | return AE_OK; | |
472 | } | |
4be44fcd | 473 | |
1da177e4 LT |
474 | EXPORT_SYMBOL(acpi_os_read_port); |
475 | ||
4be44fcd | 476 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 477 | { |
49fbabf5 | 478 | if (width <= 8) { |
1da177e4 | 479 | outb(value, port); |
49fbabf5 | 480 | } else if (width <= 16) { |
1da177e4 | 481 | outw(value, port); |
49fbabf5 | 482 | } else if (width <= 32) { |
1da177e4 | 483 | outl(value, port); |
49fbabf5 | 484 | } else { |
1da177e4 LT |
485 | BUG(); |
486 | } | |
487 | ||
488 | return AE_OK; | |
489 | } | |
4be44fcd | 490 | |
1da177e4 LT |
491 | EXPORT_SYMBOL(acpi_os_write_port); |
492 | ||
493 | acpi_status | |
4be44fcd | 494 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 495 | { |
4be44fcd LB |
496 | u32 dummy; |
497 | void __iomem *virt_addr; | |
1da177e4 | 498 | |
9f4fd61f | 499 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
500 | if (!value) |
501 | value = &dummy; | |
502 | ||
503 | switch (width) { | |
504 | case 8: | |
4be44fcd | 505 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
506 | break; |
507 | case 16: | |
4be44fcd | 508 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
509 | break; |
510 | case 32: | |
4be44fcd | 511 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
512 | break; |
513 | default: | |
514 | BUG(); | |
515 | } | |
516 | ||
9f4fd61f | 517 | iounmap(virt_addr); |
1da177e4 LT |
518 | |
519 | return AE_OK; | |
520 | } | |
521 | ||
522 | acpi_status | |
4be44fcd | 523 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 524 | { |
4be44fcd | 525 | void __iomem *virt_addr; |
1da177e4 | 526 | |
9f4fd61f | 527 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
528 | |
529 | switch (width) { | |
530 | case 8: | |
531 | writeb(value, virt_addr); | |
532 | break; | |
533 | case 16: | |
534 | writew(value, virt_addr); | |
535 | break; | |
536 | case 32: | |
537 | writel(value, virt_addr); | |
538 | break; | |
539 | default: | |
540 | BUG(); | |
541 | } | |
542 | ||
9f4fd61f | 543 | iounmap(virt_addr); |
1da177e4 LT |
544 | |
545 | return AE_OK; | |
546 | } | |
547 | ||
1da177e4 | 548 | acpi_status |
4be44fcd | 549 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
10270d48 | 550 | u32 *value, u32 width) |
1da177e4 LT |
551 | { |
552 | int result, size; | |
553 | ||
554 | if (!value) | |
555 | return AE_BAD_PARAMETER; | |
556 | ||
557 | switch (width) { | |
558 | case 8: | |
559 | size = 1; | |
560 | break; | |
561 | case 16: | |
562 | size = 2; | |
563 | break; | |
564 | case 32: | |
565 | size = 4; | |
566 | break; | |
567 | default: | |
568 | return AE_ERROR; | |
569 | } | |
570 | ||
b6ce068a MW |
571 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
572 | PCI_DEVFN(pci_id->device, pci_id->function), | |
573 | reg, size, value); | |
1da177e4 LT |
574 | |
575 | return (result ? AE_ERROR : AE_OK); | |
576 | } | |
4be44fcd | 577 | |
1da177e4 | 578 | acpi_status |
4be44fcd | 579 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 580 | u64 value, u32 width) |
1da177e4 LT |
581 | { |
582 | int result, size; | |
583 | ||
584 | switch (width) { | |
585 | case 8: | |
586 | size = 1; | |
587 | break; | |
588 | case 16: | |
589 | size = 2; | |
590 | break; | |
591 | case 32: | |
592 | size = 4; | |
593 | break; | |
594 | default: | |
595 | return AE_ERROR; | |
596 | } | |
597 | ||
b6ce068a MW |
598 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
599 | PCI_DEVFN(pci_id->device, pci_id->function), | |
600 | reg, size, value); | |
1da177e4 LT |
601 | |
602 | return (result ? AE_ERROR : AE_OK); | |
603 | } | |
604 | ||
605 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
606 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
607 | acpi_handle chandle, /* current node */ | |
608 | struct acpi_pci_id **id, | |
609 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 610 | { |
4be44fcd LB |
611 | acpi_handle handle; |
612 | struct acpi_pci_id *pci_id = *id; | |
613 | acpi_status status; | |
27663c58 | 614 | unsigned long long temp; |
4be44fcd | 615 | acpi_object_type type; |
1da177e4 LT |
616 | |
617 | acpi_get_parent(chandle, &handle); | |
618 | if (handle != rhandle) { | |
4be44fcd LB |
619 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
620 | bus_number); | |
1da177e4 LT |
621 | |
622 | status = acpi_get_type(handle, &type); | |
4be44fcd | 623 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
624 | return; |
625 | ||
27663c58 | 626 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, |
4be44fcd | 627 | &temp); |
1da177e4 | 628 | if (ACPI_SUCCESS(status)) { |
10270d48 | 629 | u32 val; |
4be44fcd LB |
630 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
631 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
632 | |
633 | if (*is_bridge) | |
634 | pci_id->bus = *bus_number; | |
635 | ||
636 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd | 637 | status = |
10270d48 | 638 | acpi_os_read_pci_configuration(pci_id, 0x0e, &val, |
4be44fcd LB |
639 | 8); |
640 | if (ACPI_SUCCESS(status) | |
10270d48 | 641 | && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) { |
4be44fcd LB |
642 | status = |
643 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
10270d48 | 644 | &val, 8); |
1da177e4 LT |
645 | if (!ACPI_SUCCESS(status)) { |
646 | /* Certainly broken... FIX ME */ | |
647 | return; | |
648 | } | |
649 | *is_bridge = 1; | |
10270d48 | 650 | pci_id->bus = val; |
4be44fcd LB |
651 | status = |
652 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
10270d48 | 653 | &val, 8); |
1da177e4 | 654 | if (ACPI_SUCCESS(status)) { |
10270d48 | 655 | *bus_number = val; |
1da177e4 LT |
656 | } |
657 | } else | |
658 | *is_bridge = 0; | |
659 | } | |
660 | } | |
661 | } | |
662 | ||
4be44fcd LB |
663 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
664 | acpi_handle chandle, /* current node */ | |
665 | struct acpi_pci_id **id) | |
1da177e4 LT |
666 | { |
667 | int is_bridge = 1; | |
668 | u8 bus_number = (*id)->bus; | |
669 | ||
670 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
671 | } | |
672 | ||
65f27f38 | 673 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
674 | { |
675 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 676 | |
9ac61856 BH |
677 | if (dpc->wait) |
678 | acpi_os_wait_events_complete(NULL); | |
19cd847a ZR |
679 | |
680 | dpc->function(dpc->context); | |
681 | kfree(dpc); | |
19cd847a ZR |
682 | } |
683 | ||
b8d35192 AS |
684 | /******************************************************************************* |
685 | * | |
686 | * FUNCTION: acpi_os_execute | |
687 | * | |
688 | * PARAMETERS: Type - Type of the callback | |
689 | * Function - Function to be executed | |
690 | * Context - Function parameters | |
691 | * | |
692 | * RETURN: Status | |
693 | * | |
694 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
695 | * immediately executes function on a separate thread. | |
696 | * | |
697 | ******************************************************************************/ | |
698 | ||
19cd847a ZR |
699 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
700 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 701 | { |
4be44fcd LB |
702 | acpi_status status = AE_OK; |
703 | struct acpi_os_dpc *dpc; | |
17bc54ee | 704 | struct workqueue_struct *queue; |
19cd847a | 705 | int ret; |
72945b2b LB |
706 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
707 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
708 | function, context)); | |
1da177e4 | 709 | |
1da177e4 LT |
710 | /* |
711 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 712 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
713 | * way that allows us to also free its memory inside the callee. |
714 | * Because we may want to schedule several tasks with different | |
715 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 716 | * having a static work_struct. |
1da177e4 | 717 | */ |
72945b2b | 718 | |
65f27f38 | 719 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 720 | if (!dpc) |
889c78be | 721 | return AE_NO_MEMORY; |
b976fe19 | 722 | |
1da177e4 LT |
723 | dpc->function = function; |
724 | dpc->context = context; | |
b976fe19 | 725 | |
c02256be ZR |
726 | /* |
727 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
728 | * because the hotplug code may call driver .remove() functions, | |
729 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
730 | * to flush these workqueues. | |
731 | */ | |
732 | queue = hp ? kacpi_hotplug_wq : | |
733 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
9ac61856 | 734 | dpc->wait = hp ? 1 : 0; |
bc73675b ZR |
735 | |
736 | if (queue == kacpi_hotplug_wq) | |
737 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
738 | else if (queue == kacpi_notify_wq) | |
739 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
740 | else | |
741 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
742 | ||
8fec62b2 TH |
743 | /* |
744 | * On some machines, a software-initiated SMI causes corruption unless | |
745 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
746 | * typically it's done in GPE-related methods that are run via | |
747 | * workqueues, so we can avoid the known corruption cases by always | |
748 | * queueing on CPU 0. | |
749 | */ | |
750 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
751 | |
752 | if (!ret) { | |
55ac9a01 LM |
753 | printk(KERN_ERR PREFIX |
754 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
755 | status = AE_ERROR; |
756 | kfree(dpc); | |
1da177e4 | 757 | } |
889c78be | 758 | return status; |
1da177e4 | 759 | } |
4be44fcd | 760 | |
19cd847a ZR |
761 | acpi_status acpi_os_execute(acpi_execute_type type, |
762 | acpi_osd_exec_callback function, void *context) | |
763 | { | |
764 | return __acpi_os_execute(type, function, context, 0); | |
765 | } | |
b8d35192 | 766 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 767 | |
19cd847a ZR |
768 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
769 | void *context) | |
770 | { | |
771 | return __acpi_os_execute(0, function, context, 1); | |
772 | } | |
773 | ||
4be44fcd | 774 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
775 | { |
776 | flush_workqueue(kacpid_wq); | |
2f67a069 | 777 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 778 | } |
4be44fcd | 779 | |
1da177e4 LT |
780 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
781 | ||
1da177e4 LT |
782 | /* |
783 | * Deallocate the memory for a spinlock. | |
784 | */ | |
967440e3 | 785 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 786 | { |
d550d98d | 787 | return; |
1da177e4 LT |
788 | } |
789 | ||
1da177e4 | 790 | acpi_status |
4be44fcd | 791 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 792 | { |
4be44fcd | 793 | struct semaphore *sem = NULL; |
1da177e4 | 794 | |
1da177e4 LT |
795 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
796 | if (!sem) | |
d550d98d | 797 | return AE_NO_MEMORY; |
1da177e4 LT |
798 | memset(sem, 0, sizeof(struct semaphore)); |
799 | ||
800 | sema_init(sem, initial_units); | |
801 | ||
4be44fcd | 802 | *handle = (acpi_handle *) sem; |
1da177e4 | 803 | |
4be44fcd LB |
804 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
805 | *handle, initial_units)); | |
1da177e4 | 806 | |
d550d98d | 807 | return AE_OK; |
1da177e4 | 808 | } |
1da177e4 | 809 | |
1da177e4 LT |
810 | /* |
811 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
812 | * 'delete_semaphore()' function -- may result in an invalid | |
813 | * pointer dereference for non-synchronized consumers. Should | |
814 | * we at least check for blocked threads and signal/cancel them? | |
815 | */ | |
816 | ||
4be44fcd | 817 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 818 | { |
4be44fcd | 819 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 820 | |
1da177e4 | 821 | if (!sem) |
d550d98d | 822 | return AE_BAD_PARAMETER; |
1da177e4 | 823 | |
4be44fcd | 824 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 825 | |
f1241c87 | 826 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 827 | kfree(sem); |
4be44fcd | 828 | sem = NULL; |
1da177e4 | 829 | |
d550d98d | 830 | return AE_OK; |
1da177e4 | 831 | } |
1da177e4 | 832 | |
1da177e4 | 833 | /* |
1da177e4 LT |
834 | * TODO: Support for units > 1? |
835 | */ | |
4be44fcd | 836 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 837 | { |
4be44fcd LB |
838 | acpi_status status = AE_OK; |
839 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 840 | long jiffies; |
4be44fcd | 841 | int ret = 0; |
1da177e4 | 842 | |
1da177e4 | 843 | if (!sem || (units < 1)) |
d550d98d | 844 | return AE_BAD_PARAMETER; |
1da177e4 LT |
845 | |
846 | if (units > 1) | |
d550d98d | 847 | return AE_SUPPORT; |
1da177e4 | 848 | |
4be44fcd LB |
849 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
850 | handle, units, timeout)); | |
1da177e4 | 851 | |
f1241c87 MW |
852 | if (timeout == ACPI_WAIT_FOREVER) |
853 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
854 | else | |
855 | jiffies = msecs_to_jiffies(timeout); | |
856 | ||
857 | ret = down_timeout(sem, jiffies); | |
858 | if (ret) | |
859 | status = AE_TIME; | |
1da177e4 LT |
860 | |
861 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 862 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 863 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
864 | handle, units, timeout, |
865 | acpi_format_exception(status))); | |
866 | } else { | |
867 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 868 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 869 | units, timeout)); |
1da177e4 LT |
870 | } |
871 | ||
d550d98d | 872 | return status; |
1da177e4 | 873 | } |
1da177e4 | 874 | |
1da177e4 LT |
875 | /* |
876 | * TODO: Support for units > 1? | |
877 | */ | |
4be44fcd | 878 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 879 | { |
4be44fcd | 880 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 881 | |
1da177e4 | 882 | if (!sem || (units < 1)) |
d550d98d | 883 | return AE_BAD_PARAMETER; |
1da177e4 LT |
884 | |
885 | if (units > 1) | |
d550d98d | 886 | return AE_SUPPORT; |
1da177e4 | 887 | |
4be44fcd LB |
888 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
889 | units)); | |
1da177e4 LT |
890 | |
891 | up(sem); | |
892 | ||
d550d98d | 893 | return AE_OK; |
1da177e4 | 894 | } |
4be44fcd | 895 | |
1da177e4 | 896 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 897 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
898 | { |
899 | ||
900 | #ifdef ENABLE_DEBUGGER | |
901 | if (acpi_in_debugger) { | |
902 | u32 chars; | |
903 | ||
904 | kdb_read(buffer, sizeof(line_buf)); | |
905 | ||
906 | /* remove the CR kdb includes */ | |
907 | chars = strlen(buffer) - 1; | |
908 | buffer[chars] = '\0'; | |
909 | } | |
910 | #endif | |
911 | ||
912 | return 0; | |
913 | } | |
4be44fcd | 914 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 915 | |
4be44fcd | 916 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 917 | { |
4be44fcd | 918 | switch (function) { |
1da177e4 LT |
919 | case ACPI_SIGNAL_FATAL: |
920 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
921 | break; | |
922 | case ACPI_SIGNAL_BREAKPOINT: | |
923 | /* | |
924 | * AML Breakpoint | |
925 | * ACPI spec. says to treat it as a NOP unless | |
926 | * you are debugging. So if/when we integrate | |
927 | * AML debugger into the kernel debugger its | |
928 | * hook will go here. But until then it is | |
929 | * not useful to print anything on breakpoints. | |
930 | */ | |
931 | break; | |
932 | default: | |
933 | break; | |
934 | } | |
935 | ||
936 | return AE_OK; | |
937 | } | |
4be44fcd | 938 | |
4be44fcd | 939 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
940 | { |
941 | char *p = acpi_os_name; | |
4be44fcd | 942 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
943 | |
944 | if (!str || !*str) | |
945 | return 0; | |
946 | ||
947 | for (; count-- && str && *str; str++) { | |
948 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
949 | *p++ = *str; | |
950 | else if (*str == '\'' || *str == '"') | |
951 | continue; | |
952 | else | |
953 | break; | |
954 | } | |
955 | *p = 0; | |
956 | ||
957 | return 1; | |
4be44fcd | 958 | |
1da177e4 LT |
959 | } |
960 | ||
961 | __setup("acpi_os_name=", acpi_os_name_setup); | |
962 | ||
d4b7dc49 LB |
963 | static void __init set_osi_linux(unsigned int enable) |
964 | { | |
965 | if (osi_linux.enable != enable) { | |
966 | osi_linux.enable = enable; | |
967 | printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", | |
968 | enable ? "Add": "Delet"); | |
969 | } | |
970 | return; | |
971 | } | |
972 | ||
973 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
974 | { | |
975 | osi_linux.cmdline = 1; /* cmdline set the default */ | |
976 | set_osi_linux(enable); | |
977 | ||
978 | return; | |
979 | } | |
980 | ||
981 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
982 | { | |
983 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ | |
984 | ||
985 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); | |
986 | ||
987 | if (enable == -1) | |
988 | return; | |
989 | ||
990 | osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ | |
f507654d | 991 | |
d4b7dc49 | 992 | set_osi_linux(enable); |
f507654d | 993 | |
f507654d LB |
994 | return; |
995 | } | |
996 | ||
1da177e4 | 997 | /* |
ae00d812 LB |
998 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
999 | * | |
1da177e4 | 1000 | * empty string disables _OSI |
ae00d812 LB |
1001 | * string starting with '!' disables that string |
1002 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1003 | */ |
46c1fbdb | 1004 | int __init acpi_osi_setup(char *str) |
1da177e4 LT |
1005 | { |
1006 | if (str == NULL || *str == '\0') { | |
1007 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1008 | acpi_gbl_create_osi_method = FALSE; | |
aa2e09da | 1009 | } else if (!strcmp("!Linux", str)) { |
d4b7dc49 | 1010 | acpi_cmdline_osi_linux(0); /* !enable */ |
ae00d812 LB |
1011 | } else if (*str == '!') { |
1012 | if (acpi_osi_invalidate(++str) == AE_OK) | |
1013 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
f507654d | 1014 | } else if (!strcmp("Linux", str)) { |
d4b7dc49 | 1015 | acpi_cmdline_osi_linux(1); /* enable */ |
ae00d812 LB |
1016 | } else if (*osi_additional_string == '\0') { |
1017 | strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); | |
1018 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1da177e4 LT |
1019 | } |
1020 | ||
1021 | return 1; | |
1022 | } | |
1023 | ||
1024 | __setup("acpi_osi=", acpi_osi_setup); | |
1025 | ||
1026 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1027 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1028 | { |
1029 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1030 | ||
1031 | acpi_gbl_all_methods_serialized = TRUE; | |
1032 | ||
1033 | return 1; | |
1034 | } | |
1035 | ||
1036 | __setup("acpi_serialize", acpi_serialize_setup); | |
1037 | ||
df92e695 TR |
1038 | /* Check of resource interference between native drivers and ACPI |
1039 | * OperationRegions (SystemIO and System Memory only). | |
1040 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1041 | * in arbitrary AML code and can interfere with legacy drivers. | |
1042 | * acpi_enforce_resources= can be set to: | |
1043 | * | |
7e90560c | 1044 | * - strict (default) (2) |
df92e695 | 1045 | * -> further driver trying to access the resources will not load |
7e90560c | 1046 | * - lax (1) |
df92e695 TR |
1047 | * -> further driver trying to access the resources will load, but you |
1048 | * get a system message that something might go wrong... | |
1049 | * | |
1050 | * - no (0) | |
1051 | * -> ACPI Operation Region resources will not be registered | |
1052 | * | |
1053 | */ | |
1054 | #define ENFORCE_RESOURCES_STRICT 2 | |
1055 | #define ENFORCE_RESOURCES_LAX 1 | |
1056 | #define ENFORCE_RESOURCES_NO 0 | |
1057 | ||
7e90560c | 1058 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1059 | |
1060 | static int __init acpi_enforce_resources_setup(char *str) | |
1061 | { | |
1062 | if (str == NULL || *str == '\0') | |
1063 | return 0; | |
1064 | ||
1065 | if (!strcmp("strict", str)) | |
1066 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1067 | else if (!strcmp("lax", str)) | |
1068 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1069 | else if (!strcmp("no", str)) | |
1070 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1071 | ||
1072 | return 1; | |
1073 | } | |
1074 | ||
1075 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1076 | ||
1077 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1078 | * drivers */ | |
876fba43 | 1079 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 TR |
1080 | { |
1081 | struct acpi_res_list *res_list_elem; | |
1082 | int ioport; | |
1083 | int clash = 0; | |
1084 | ||
1085 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1086 | return 0; | |
1087 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1088 | return 0; | |
1089 | ||
1090 | ioport = res->flags & IORESOURCE_IO; | |
1091 | ||
1092 | spin_lock(&acpi_res_lock); | |
1093 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1094 | resource_list) { | |
1095 | if (ioport && (res_list_elem->resource_type | |
1096 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1097 | continue; | |
1098 | if (!ioport && (res_list_elem->resource_type | |
1099 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1100 | continue; | |
1101 | ||
1102 | if (res->end < res_list_elem->start | |
1103 | || res_list_elem->end < res->start) | |
1104 | continue; | |
1105 | clash = 1; | |
1106 | break; | |
1107 | } | |
1108 | spin_unlock(&acpi_res_lock); | |
1109 | ||
1110 | if (clash) { | |
1111 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
1638bca8 CD |
1112 | printk(KERN_WARNING "ACPI: resource %s %pR" |
1113 | " conflicts with ACPI region %s %pR\n", | |
1114 | res->name, res, res_list_elem->name, | |
1115 | res_list_elem); | |
14f03343 JD |
1116 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1117 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1118 | " cause random problems and system" | |
1119 | " instability\n"); | |
1120 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1121 | " for this device, you should use it instead of" | |
1122 | " the native driver\n"); | |
df92e695 TR |
1123 | } |
1124 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1125 | return -EBUSY; | |
1126 | } | |
1127 | return 0; | |
1128 | } | |
443dea72 | 1129 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1130 | |
1131 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1132 | const char *name) | |
1133 | { | |
1134 | struct resource res = { | |
1135 | .start = start, | |
1136 | .end = start + n - 1, | |
1137 | .name = name, | |
1138 | .flags = IORESOURCE_IO, | |
1139 | }; | |
1140 | ||
1141 | return acpi_check_resource_conflict(&res); | |
1142 | } | |
1143 | EXPORT_SYMBOL(acpi_check_region); | |
1144 | ||
70dd6bea JD |
1145 | /* |
1146 | * Let drivers know whether the resource checks are effective | |
1147 | */ | |
1148 | int acpi_resources_are_enforced(void) | |
1149 | { | |
1150 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1151 | } | |
1152 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1153 | ||
73459f73 RM |
1154 | /* |
1155 | * Acquire a spinlock. | |
1156 | * | |
1157 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1158 | */ |
1159 | ||
967440e3 | 1160 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1161 | { |
b8e4d893 | 1162 | acpi_cpu_flags flags; |
967440e3 | 1163 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1164 | return flags; |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Release a spinlock. See above. | |
1169 | */ | |
1170 | ||
967440e3 | 1171 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1172 | { |
967440e3 | 1173 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1174 | } |
1175 | ||
73459f73 RM |
1176 | #ifndef ACPI_USE_LOCAL_CACHE |
1177 | ||
1178 | /******************************************************************************* | |
1179 | * | |
1180 | * FUNCTION: acpi_os_create_cache | |
1181 | * | |
b229cf92 BM |
1182 | * PARAMETERS: name - Ascii name for the cache |
1183 | * size - Size of each cached object | |
1184 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1185 | * cache - Where the new cache object is returned | |
73459f73 | 1186 | * |
b229cf92 | 1187 | * RETURN: status |
73459f73 RM |
1188 | * |
1189 | * DESCRIPTION: Create a cache object | |
1190 | * | |
1191 | ******************************************************************************/ | |
1192 | ||
1193 | acpi_status | |
4be44fcd | 1194 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1195 | { |
20c2df83 | 1196 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1197 | if (*cache == NULL) |
b229cf92 BM |
1198 | return AE_ERROR; |
1199 | else | |
1200 | return AE_OK; | |
73459f73 RM |
1201 | } |
1202 | ||
1203 | /******************************************************************************* | |
1204 | * | |
1205 | * FUNCTION: acpi_os_purge_cache | |
1206 | * | |
1207 | * PARAMETERS: Cache - Handle to cache object | |
1208 | * | |
1209 | * RETURN: Status | |
1210 | * | |
1211 | * DESCRIPTION: Free all objects within the requested cache. | |
1212 | * | |
1213 | ******************************************************************************/ | |
1214 | ||
4be44fcd | 1215 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1216 | { |
50dd0969 | 1217 | kmem_cache_shrink(cache); |
4be44fcd | 1218 | return (AE_OK); |
73459f73 RM |
1219 | } |
1220 | ||
1221 | /******************************************************************************* | |
1222 | * | |
1223 | * FUNCTION: acpi_os_delete_cache | |
1224 | * | |
1225 | * PARAMETERS: Cache - Handle to cache object | |
1226 | * | |
1227 | * RETURN: Status | |
1228 | * | |
1229 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1230 | * cache object. | |
1231 | * | |
1232 | ******************************************************************************/ | |
1233 | ||
4be44fcd | 1234 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1235 | { |
1a1d92c1 | 1236 | kmem_cache_destroy(cache); |
4be44fcd | 1237 | return (AE_OK); |
73459f73 RM |
1238 | } |
1239 | ||
1240 | /******************************************************************************* | |
1241 | * | |
1242 | * FUNCTION: acpi_os_release_object | |
1243 | * | |
1244 | * PARAMETERS: Cache - Handle to cache object | |
1245 | * Object - The object to be released | |
1246 | * | |
1247 | * RETURN: None | |
1248 | * | |
1249 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1250 | * the object is deleted. | |
1251 | * | |
1252 | ******************************************************************************/ | |
1253 | ||
4be44fcd | 1254 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1255 | { |
4be44fcd LB |
1256 | kmem_cache_free(cache, object); |
1257 | return (AE_OK); | |
73459f73 RM |
1258 | } |
1259 | ||
b229cf92 BM |
1260 | /****************************************************************************** |
1261 | * | |
1262 | * FUNCTION: acpi_os_validate_interface | |
1263 | * | |
1264 | * PARAMETERS: interface - Requested interface to be validated | |
1265 | * | |
1266 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1267 | * | |
1268 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1269 | * host. Strings originate from an AML call to the _OSI method. | |
1270 | * | |
1271 | *****************************************************************************/ | |
1272 | ||
1273 | acpi_status | |
1274 | acpi_os_validate_interface (char *interface) | |
1275 | { | |
ae00d812 LB |
1276 | if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) |
1277 | return AE_OK; | |
f507654d | 1278 | if (!strcmp("Linux", interface)) { |
d4b7dc49 | 1279 | |
f40cd6fd | 1280 | printk(KERN_NOTICE PREFIX |
d4b7dc49 LB |
1281 | "BIOS _OSI(Linux) query %s%s\n", |
1282 | osi_linux.enable ? "honored" : "ignored", | |
1283 | osi_linux.cmdline ? " via cmdline" : | |
1284 | osi_linux.dmi ? " via DMI" : ""); | |
1285 | ||
d4b7dc49 | 1286 | if (osi_linux.enable) |
f507654d LB |
1287 | return AE_OK; |
1288 | } | |
ae00d812 | 1289 | return AE_SUPPORT; |
b229cf92 BM |
1290 | } |
1291 | ||
a5fe1a03 LM |
1292 | static inline int acpi_res_list_add(struct acpi_res_list *res) |
1293 | { | |
1294 | struct acpi_res_list *res_list_elem; | |
1295 | ||
1296 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1297 | resource_list) { | |
1298 | ||
1299 | if (res->resource_type == res_list_elem->resource_type && | |
1300 | res->start == res_list_elem->start && | |
1301 | res->end == res_list_elem->end) { | |
1302 | ||
1303 | /* | |
1304 | * The Region(addr,len) already exist in the list, | |
1305 | * just increase the count | |
1306 | */ | |
1307 | ||
1308 | res_list_elem->count++; | |
1309 | return 0; | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | res->count = 1; | |
1314 | list_add(&res->resource_list, &resource_list_head); | |
1315 | return 1; | |
1316 | } | |
1317 | ||
1318 | static inline void acpi_res_list_del(struct acpi_res_list *res) | |
1319 | { | |
1320 | struct acpi_res_list *res_list_elem; | |
1321 | ||
1322 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1323 | resource_list) { | |
1324 | ||
1325 | if (res->resource_type == res_list_elem->resource_type && | |
1326 | res->start == res_list_elem->start && | |
1327 | res->end == res_list_elem->end) { | |
1328 | ||
1329 | /* | |
1330 | * If the res count is decreased to 0, | |
1331 | * remove and free it | |
1332 | */ | |
1333 | ||
1334 | if (--res_list_elem->count == 0) { | |
1335 | list_del(&res_list_elem->resource_list); | |
1336 | kfree(res_list_elem); | |
1337 | } | |
1338 | return; | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | acpi_status | |
1344 | acpi_os_invalidate_address( | |
1345 | u8 space_id, | |
1346 | acpi_physical_address address, | |
1347 | acpi_size length) | |
1348 | { | |
1349 | struct acpi_res_list res; | |
1350 | ||
1351 | switch (space_id) { | |
1352 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1353 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1354 | /* Only interference checks against SystemIO and SystemMemory |
a5fe1a03 LM |
1355 | are needed */ |
1356 | res.start = address; | |
1357 | res.end = address + length - 1; | |
1358 | res.resource_type = space_id; | |
1359 | spin_lock(&acpi_res_lock); | |
1360 | acpi_res_list_del(&res); | |
1361 | spin_unlock(&acpi_res_lock); | |
1362 | break; | |
1363 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1364 | case ACPI_ADR_SPACE_EC: | |
1365 | case ACPI_ADR_SPACE_SMBUS: | |
1366 | case ACPI_ADR_SPACE_CMOS: | |
1367 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1368 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1369 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1370 | break; | |
1371 | } | |
1372 | return AE_OK; | |
1373 | } | |
1374 | ||
b229cf92 BM |
1375 | /****************************************************************************** |
1376 | * | |
1377 | * FUNCTION: acpi_os_validate_address | |
1378 | * | |
1379 | * PARAMETERS: space_id - ACPI space ID | |
1380 | * address - Physical address | |
1381 | * length - Address length | |
1382 | * | |
1383 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1384 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1385 | * | |
1386 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1387 | * the addresses accessed by AML operation regions. | |
1388 | * | |
1389 | *****************************************************************************/ | |
1390 | ||
1391 | acpi_status | |
1392 | acpi_os_validate_address ( | |
1393 | u8 space_id, | |
1394 | acpi_physical_address address, | |
df92e695 TR |
1395 | acpi_size length, |
1396 | char *name) | |
b229cf92 | 1397 | { |
df92e695 | 1398 | struct acpi_res_list *res; |
a5fe1a03 | 1399 | int added; |
df92e695 TR |
1400 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
1401 | return AE_OK; | |
b229cf92 | 1402 | |
df92e695 TR |
1403 | switch (space_id) { |
1404 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1405 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1406 | /* Only interference checks against SystemIO and SystemMemory |
df92e695 TR |
1407 | are needed */ |
1408 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1409 | if (!res) | |
1410 | return AE_OK; | |
1411 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1412 | strlcpy(res->name, name, 5); | |
1413 | res->start = address; | |
1414 | res->end = address + length - 1; | |
1415 | res->resource_type = space_id; | |
1416 | spin_lock(&acpi_res_lock); | |
a5fe1a03 | 1417 | added = acpi_res_list_add(res); |
df92e695 | 1418 | spin_unlock(&acpi_res_lock); |
a5fe1a03 LM |
1419 | pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " |
1420 | "name: %s\n", added ? "Added" : "Already exist", | |
1421 | (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
df92e695 TR |
1422 | ? "SystemIO" : "System Memory", |
1423 | (unsigned long long)res->start, | |
1424 | (unsigned long long)res->end, | |
1425 | res->name); | |
a5fe1a03 LM |
1426 | if (!added) |
1427 | kfree(res); | |
df92e695 TR |
1428 | break; |
1429 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1430 | case ACPI_ADR_SPACE_EC: | |
1431 | case ACPI_ADR_SPACE_SMBUS: | |
1432 | case ACPI_ADR_SPACE_CMOS: | |
1433 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1434 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1435 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1436 | break; | |
1437 | } | |
1438 | return AE_OK; | |
b229cf92 BM |
1439 | } |
1440 | ||
73459f73 | 1441 | #endif |