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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; |
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 | { | |
144 | struct resource *res; | |
145 | ||
146 | if (!addr->address || !length) | |
147 | return; | |
148 | ||
eee3c859 | 149 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
9a47cdb1 | 150 | res = request_region(addr->address, length, desc); |
eee3c859 | 151 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
9a47cdb1 BH |
152 | res = request_mem_region(addr->address, length, desc); |
153 | } | |
154 | ||
155 | static int __init acpi_reserve_resources(void) | |
156 | { | |
eee3c859 | 157 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
158 | "ACPI PM1a_EVT_BLK"); |
159 | ||
eee3c859 | 160 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
161 | "ACPI PM1b_EVT_BLK"); |
162 | ||
eee3c859 | 163 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
164 | "ACPI PM1a_CNT_BLK"); |
165 | ||
eee3c859 | 166 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
167 | "ACPI PM1b_CNT_BLK"); |
168 | ||
eee3c859 LB |
169 | if (acpi_gbl_FADT.pm_timer_length == 4) |
170 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 171 | |
eee3c859 | 172 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
173 | "ACPI PM2_CNT_BLK"); |
174 | ||
175 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
176 | ||
eee3c859 LB |
177 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
178 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
179 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 180 | |
eee3c859 LB |
181 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
182 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
183 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
184 | |
185 | return 0; | |
186 | } | |
187 | device_initcall(acpi_reserve_resources); | |
188 | ||
dd272b57 | 189 | acpi_status __init acpi_os_initialize(void) |
1da177e4 LT |
190 | { |
191 | return AE_OK; | |
192 | } | |
193 | ||
74b58208 BH |
194 | static void bind_to_cpu0(struct work_struct *work) |
195 | { | |
e68110fb | 196 | set_cpus_allowed_ptr(current, cpumask_of(0)); |
74b58208 BH |
197 | kfree(work); |
198 | } | |
199 | ||
200 | static void bind_workqueue(struct workqueue_struct *wq) | |
201 | { | |
202 | struct work_struct *work; | |
203 | ||
204 | work = kzalloc(sizeof(struct work_struct), GFP_KERNEL); | |
205 | INIT_WORK(work, bind_to_cpu0); | |
206 | queue_work(wq, work); | |
207 | } | |
208 | ||
4be44fcd | 209 | acpi_status acpi_os_initialize1(void) |
1da177e4 | 210 | { |
74b58208 BH |
211 | /* |
212 | * On some machines, a software-initiated SMI causes corruption unless | |
213 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
214 | * typically it's done in GPE-related methods that are run via | |
215 | * workqueues, so we can avoid the known corruption cases by binding | |
216 | * the workqueues to CPU 0. | |
217 | */ | |
1da177e4 | 218 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
74b58208 | 219 | bind_workqueue(kacpid_wq); |
88db5e14 | 220 | kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); |
74b58208 | 221 | bind_workqueue(kacpi_notify_wq); |
c02256be | 222 | kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug"); |
74b58208 | 223 | bind_workqueue(kacpi_hotplug_wq); |
1da177e4 | 224 | BUG_ON(!kacpid_wq); |
88db5e14 | 225 | BUG_ON(!kacpi_notify_wq); |
c02256be | 226 | BUG_ON(!kacpi_hotplug_wq); |
1da177e4 LT |
227 | return AE_OK; |
228 | } | |
229 | ||
4be44fcd | 230 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
231 | { |
232 | if (acpi_irq_handler) { | |
233 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
234 | acpi_irq_handler); | |
235 | } | |
236 | ||
237 | destroy_workqueue(kacpid_wq); | |
88db5e14 | 238 | destroy_workqueue(kacpi_notify_wq); |
c02256be | 239 | destroy_workqueue(kacpi_hotplug_wq); |
1da177e4 LT |
240 | |
241 | return AE_OK; | |
242 | } | |
243 | ||
4be44fcd | 244 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
245 | { |
246 | va_list args; | |
247 | va_start(args, fmt); | |
248 | acpi_os_vprintf(fmt, args); | |
249 | va_end(args); | |
250 | } | |
4be44fcd | 251 | |
4be44fcd | 252 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
253 | { |
254 | static char buffer[512]; | |
4be44fcd | 255 | |
1da177e4 LT |
256 | vsprintf(buffer, fmt, args); |
257 | ||
258 | #ifdef ENABLE_DEBUGGER | |
259 | if (acpi_in_debugger) { | |
260 | kdb_printf("%s", buffer); | |
261 | } else { | |
4d939155 | 262 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
263 | } |
264 | #else | |
4d939155 | 265 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
266 | #endif |
267 | } | |
268 | ||
ad71860a | 269 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 LT |
270 | { |
271 | if (efi_enabled) { | |
b2c99e3c | 272 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 273 | return efi.acpi20; |
b2c99e3c | 274 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 275 | return efi.acpi; |
1da177e4 | 276 | else { |
4be44fcd LB |
277 | printk(KERN_ERR PREFIX |
278 | "System description tables not found\n"); | |
ad71860a | 279 | return 0; |
1da177e4 | 280 | } |
239665a3 LB |
281 | } else { |
282 | acpi_physical_address pa = 0; | |
283 | ||
284 | acpi_find_root_pointer(&pa); | |
285 | return pa; | |
286 | } | |
1da177e4 LT |
287 | } |
288 | ||
2fdf0741 JB |
289 | void __iomem *__init_refok |
290 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 291 | { |
9f4fd61f BH |
292 | if (phys > ULONG_MAX) { |
293 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 294 | return NULL; |
1da177e4 | 295 | } |
ad71860a AS |
296 | if (acpi_gbl_permanent_mmap) |
297 | /* | |
298 | * ioremap checks to ensure this is in reserved space | |
299 | */ | |
300 | return ioremap((unsigned long)phys, size); | |
301 | else | |
302 | return __acpi_map_table((unsigned long)phys, size); | |
1da177e4 | 303 | } |
55a82ab3 | 304 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 305 | |
0d3a9cf5 | 306 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 307 | { |
7d97277b | 308 | if (acpi_gbl_permanent_mmap) |
ad71860a | 309 | iounmap(virt); |
7d97277b YL |
310 | else |
311 | __acpi_unmap_table(virt, size); | |
1da177e4 | 312 | } |
55a82ab3 | 313 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 314 | |
0d3a9cf5 | 315 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
316 | { |
317 | if (!acpi_gbl_permanent_mmap) | |
318 | __acpi_unmap_table(virt, size); | |
319 | } | |
320 | ||
1da177e4 LT |
321 | #ifdef ACPI_FUTURE_USAGE |
322 | acpi_status | |
4be44fcd | 323 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 324 | { |
4be44fcd | 325 | if (!phys || !virt) |
1da177e4 LT |
326 | return AE_BAD_PARAMETER; |
327 | ||
328 | *phys = virt_to_phys(virt); | |
329 | ||
330 | return AE_OK; | |
331 | } | |
332 | #endif | |
333 | ||
334 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
335 | ||
336 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
337 | ||
338 | acpi_status | |
4be44fcd LB |
339 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
340 | acpi_string * new_val) | |
1da177e4 LT |
341 | { |
342 | if (!init_val || !new_val) | |
343 | return AE_BAD_PARAMETER; | |
344 | ||
345 | *new_val = NULL; | |
4be44fcd | 346 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 347 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 348 | acpi_os_name); |
1da177e4 LT |
349 | *new_val = acpi_os_name; |
350 | } | |
351 | ||
352 | return AE_OK; | |
353 | } | |
354 | ||
355 | acpi_status | |
4be44fcd LB |
356 | acpi_os_table_override(struct acpi_table_header * existing_table, |
357 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
358 | { |
359 | if (!existing_table || !new_table) | |
360 | return AE_BAD_PARAMETER; | |
361 | ||
71fc47a9 MG |
362 | *new_table = NULL; |
363 | ||
1da177e4 LT |
364 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
365 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 366 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 367 | #endif |
6ed31e92 ÉP |
368 | if (*new_table != NULL) { |
369 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
370 | "this is unsafe: tainting kernel\n", | |
371 | existing_table->signature, | |
372 | existing_table->oem_table_id); | |
373 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
374 | } | |
1da177e4 LT |
375 | return AE_OK; |
376 | } | |
377 | ||
7d12e780 | 378 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 379 | { |
5229e87d LB |
380 | u32 handled; |
381 | ||
382 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
383 | ||
384 | if (handled) { | |
385 | acpi_irq_handled++; | |
386 | return IRQ_HANDLED; | |
88bea188 LB |
387 | } else { |
388 | acpi_irq_not_handled++; | |
5229e87d | 389 | return IRQ_NONE; |
88bea188 | 390 | } |
1da177e4 LT |
391 | } |
392 | ||
393 | acpi_status | |
4be44fcd LB |
394 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
395 | void *context) | |
1da177e4 LT |
396 | { |
397 | unsigned int irq; | |
398 | ||
5229e87d LB |
399 | acpi_irq_stats_init(); |
400 | ||
1da177e4 LT |
401 | /* |
402 | * Ignore the GSI from the core, and use the value in our copy of the | |
403 | * FADT. It may not be the same if an interrupt source override exists | |
404 | * for the SCI. | |
405 | */ | |
cee324b1 | 406 | gsi = acpi_gbl_FADT.sci_interrupt; |
1da177e4 LT |
407 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
408 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
409 | gsi); | |
410 | return AE_OK; | |
411 | } | |
412 | ||
413 | acpi_irq_handler = handler; | |
414 | acpi_irq_context = context; | |
dace1453 | 415 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
416 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
417 | return AE_NOT_ACQUIRED; | |
418 | } | |
419 | acpi_irq_irq = irq; | |
420 | ||
421 | return AE_OK; | |
422 | } | |
423 | ||
4be44fcd | 424 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
425 | { |
426 | if (irq) { | |
427 | free_irq(irq, acpi_irq); | |
428 | acpi_irq_handler = NULL; | |
429 | acpi_irq_irq = 0; | |
430 | } | |
431 | ||
432 | return AE_OK; | |
433 | } | |
434 | ||
435 | /* | |
436 | * Running in interpreter thread context, safe to sleep | |
437 | */ | |
438 | ||
4be44fcd | 439 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 | 440 | { |
01a527ec | 441 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 442 | } |
4be44fcd | 443 | |
4be44fcd | 444 | void acpi_os_stall(u32 us) |
1da177e4 LT |
445 | { |
446 | while (us) { | |
447 | u32 delay = 1000; | |
448 | ||
449 | if (delay > us) | |
450 | delay = us; | |
451 | udelay(delay); | |
452 | touch_nmi_watchdog(); | |
453 | us -= delay; | |
454 | } | |
455 | } | |
4be44fcd | 456 | |
1da177e4 LT |
457 | /* |
458 | * Support ACPI 3.0 AML Timer operand | |
459 | * Returns 64-bit free-running, monotonically increasing timer | |
460 | * with 100ns granularity | |
461 | */ | |
4be44fcd | 462 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
463 | { |
464 | static u64 t; | |
465 | ||
466 | #ifdef CONFIG_HPET | |
467 | /* TBD: use HPET if available */ | |
468 | #endif | |
469 | ||
470 | #ifdef CONFIG_X86_PM_TIMER | |
471 | /* TBD: default to PM timer if HPET was not available */ | |
472 | #endif | |
473 | if (!t) | |
474 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
475 | ||
476 | return ++t; | |
477 | } | |
478 | ||
4be44fcd | 479 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
480 | { |
481 | u32 dummy; | |
482 | ||
483 | if (!value) | |
484 | value = &dummy; | |
485 | ||
49fbabf5 ZY |
486 | *value = 0; |
487 | if (width <= 8) { | |
4be44fcd | 488 | *(u8 *) value = inb(port); |
49fbabf5 | 489 | } else if (width <= 16) { |
4be44fcd | 490 | *(u16 *) value = inw(port); |
49fbabf5 | 491 | } else if (width <= 32) { |
4be44fcd | 492 | *(u32 *) value = inl(port); |
49fbabf5 | 493 | } else { |
1da177e4 LT |
494 | BUG(); |
495 | } | |
496 | ||
497 | return AE_OK; | |
498 | } | |
4be44fcd | 499 | |
1da177e4 LT |
500 | EXPORT_SYMBOL(acpi_os_read_port); |
501 | ||
4be44fcd | 502 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 503 | { |
49fbabf5 | 504 | if (width <= 8) { |
1da177e4 | 505 | outb(value, port); |
49fbabf5 | 506 | } else if (width <= 16) { |
1da177e4 | 507 | outw(value, port); |
49fbabf5 | 508 | } else if (width <= 32) { |
1da177e4 | 509 | outl(value, port); |
49fbabf5 | 510 | } else { |
1da177e4 LT |
511 | BUG(); |
512 | } | |
513 | ||
514 | return AE_OK; | |
515 | } | |
4be44fcd | 516 | |
1da177e4 LT |
517 | EXPORT_SYMBOL(acpi_os_write_port); |
518 | ||
519 | acpi_status | |
4be44fcd | 520 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 521 | { |
4be44fcd LB |
522 | u32 dummy; |
523 | void __iomem *virt_addr; | |
1da177e4 | 524 | |
9f4fd61f | 525 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
526 | if (!value) |
527 | value = &dummy; | |
528 | ||
529 | switch (width) { | |
530 | case 8: | |
4be44fcd | 531 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
532 | break; |
533 | case 16: | |
4be44fcd | 534 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
535 | break; |
536 | case 32: | |
4be44fcd | 537 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
538 | break; |
539 | default: | |
540 | BUG(); | |
541 | } | |
542 | ||
9f4fd61f | 543 | iounmap(virt_addr); |
1da177e4 LT |
544 | |
545 | return AE_OK; | |
546 | } | |
547 | ||
548 | acpi_status | |
4be44fcd | 549 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 550 | { |
4be44fcd | 551 | void __iomem *virt_addr; |
1da177e4 | 552 | |
9f4fd61f | 553 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
554 | |
555 | switch (width) { | |
556 | case 8: | |
557 | writeb(value, virt_addr); | |
558 | break; | |
559 | case 16: | |
560 | writew(value, virt_addr); | |
561 | break; | |
562 | case 32: | |
563 | writel(value, virt_addr); | |
564 | break; | |
565 | default: | |
566 | BUG(); | |
567 | } | |
568 | ||
9f4fd61f | 569 | iounmap(virt_addr); |
1da177e4 LT |
570 | |
571 | return AE_OK; | |
572 | } | |
573 | ||
1da177e4 | 574 | acpi_status |
4be44fcd | 575 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
10270d48 | 576 | u32 *value, u32 width) |
1da177e4 LT |
577 | { |
578 | int result, size; | |
579 | ||
580 | if (!value) | |
581 | return AE_BAD_PARAMETER; | |
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_read(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 | } | |
4be44fcd | 603 | |
1da177e4 | 604 | acpi_status |
4be44fcd LB |
605 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
606 | acpi_integer value, u32 width) | |
1da177e4 LT |
607 | { |
608 | int result, size; | |
609 | ||
610 | switch (width) { | |
611 | case 8: | |
612 | size = 1; | |
613 | break; | |
614 | case 16: | |
615 | size = 2; | |
616 | break; | |
617 | case 32: | |
618 | size = 4; | |
619 | break; | |
620 | default: | |
621 | return AE_ERROR; | |
622 | } | |
623 | ||
b6ce068a MW |
624 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
625 | PCI_DEVFN(pci_id->device, pci_id->function), | |
626 | reg, size, value); | |
1da177e4 LT |
627 | |
628 | return (result ? AE_ERROR : AE_OK); | |
629 | } | |
630 | ||
631 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
632 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
633 | acpi_handle chandle, /* current node */ | |
634 | struct acpi_pci_id **id, | |
635 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 636 | { |
4be44fcd LB |
637 | acpi_handle handle; |
638 | struct acpi_pci_id *pci_id = *id; | |
639 | acpi_status status; | |
27663c58 | 640 | unsigned long long temp; |
4be44fcd | 641 | acpi_object_type type; |
1da177e4 LT |
642 | |
643 | acpi_get_parent(chandle, &handle); | |
644 | if (handle != rhandle) { | |
4be44fcd LB |
645 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
646 | bus_number); | |
1da177e4 LT |
647 | |
648 | status = acpi_get_type(handle, &type); | |
4be44fcd | 649 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
650 | return; |
651 | ||
27663c58 | 652 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, |
4be44fcd | 653 | &temp); |
1da177e4 | 654 | if (ACPI_SUCCESS(status)) { |
10270d48 | 655 | u32 val; |
4be44fcd LB |
656 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
657 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
658 | |
659 | if (*is_bridge) | |
660 | pci_id->bus = *bus_number; | |
661 | ||
662 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd | 663 | status = |
10270d48 | 664 | acpi_os_read_pci_configuration(pci_id, 0x0e, &val, |
4be44fcd LB |
665 | 8); |
666 | if (ACPI_SUCCESS(status) | |
10270d48 | 667 | && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) { |
4be44fcd LB |
668 | status = |
669 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
10270d48 | 670 | &val, 8); |
1da177e4 LT |
671 | if (!ACPI_SUCCESS(status)) { |
672 | /* Certainly broken... FIX ME */ | |
673 | return; | |
674 | } | |
675 | *is_bridge = 1; | |
10270d48 | 676 | pci_id->bus = val; |
4be44fcd LB |
677 | status = |
678 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
10270d48 | 679 | &val, 8); |
1da177e4 | 680 | if (ACPI_SUCCESS(status)) { |
10270d48 | 681 | *bus_number = val; |
1da177e4 LT |
682 | } |
683 | } else | |
684 | *is_bridge = 0; | |
685 | } | |
686 | } | |
687 | } | |
688 | ||
4be44fcd LB |
689 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
690 | acpi_handle chandle, /* current node */ | |
691 | struct acpi_pci_id **id) | |
1da177e4 LT |
692 | { |
693 | int is_bridge = 1; | |
694 | u8 bus_number = (*id)->bus; | |
695 | ||
696 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
697 | } | |
698 | ||
65f27f38 | 699 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
700 | { |
701 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 702 | |
9ac61856 BH |
703 | if (dpc->wait) |
704 | acpi_os_wait_events_complete(NULL); | |
19cd847a ZR |
705 | |
706 | dpc->function(dpc->context); | |
707 | kfree(dpc); | |
19cd847a ZR |
708 | } |
709 | ||
b8d35192 AS |
710 | /******************************************************************************* |
711 | * | |
712 | * FUNCTION: acpi_os_execute | |
713 | * | |
714 | * PARAMETERS: Type - Type of the callback | |
715 | * Function - Function to be executed | |
716 | * Context - Function parameters | |
717 | * | |
718 | * RETURN: Status | |
719 | * | |
720 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
721 | * immediately executes function on a separate thread. | |
722 | * | |
723 | ******************************************************************************/ | |
724 | ||
19cd847a ZR |
725 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
726 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 727 | { |
4be44fcd LB |
728 | acpi_status status = AE_OK; |
729 | struct acpi_os_dpc *dpc; | |
17bc54ee | 730 | struct workqueue_struct *queue; |
19cd847a | 731 | int ret; |
72945b2b LB |
732 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
733 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
734 | function, context)); | |
1da177e4 | 735 | |
1da177e4 LT |
736 | /* |
737 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 738 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
739 | * way that allows us to also free its memory inside the callee. |
740 | * Because we may want to schedule several tasks with different | |
741 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 742 | * having a static work_struct. |
1da177e4 | 743 | */ |
72945b2b | 744 | |
65f27f38 | 745 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 746 | if (!dpc) |
889c78be | 747 | return AE_NO_MEMORY; |
b976fe19 | 748 | |
1da177e4 LT |
749 | dpc->function = function; |
750 | dpc->context = context; | |
b976fe19 | 751 | |
c02256be ZR |
752 | /* |
753 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
754 | * because the hotplug code may call driver .remove() functions, | |
755 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
756 | * to flush these workqueues. | |
757 | */ | |
758 | queue = hp ? kacpi_hotplug_wq : | |
759 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
9ac61856 BH |
760 | dpc->wait = hp ? 1 : 0; |
761 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
c02256be | 762 | ret = queue_work(queue, &dpc->work); |
19cd847a ZR |
763 | |
764 | if (!ret) { | |
55ac9a01 LM |
765 | printk(KERN_ERR PREFIX |
766 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
767 | status = AE_ERROR; |
768 | kfree(dpc); | |
1da177e4 | 769 | } |
889c78be | 770 | return status; |
1da177e4 | 771 | } |
4be44fcd | 772 | |
19cd847a ZR |
773 | acpi_status acpi_os_execute(acpi_execute_type type, |
774 | acpi_osd_exec_callback function, void *context) | |
775 | { | |
776 | return __acpi_os_execute(type, function, context, 0); | |
777 | } | |
b8d35192 | 778 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 779 | |
19cd847a ZR |
780 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
781 | void *context) | |
782 | { | |
783 | return __acpi_os_execute(0, function, context, 1); | |
784 | } | |
785 | ||
4be44fcd | 786 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
787 | { |
788 | flush_workqueue(kacpid_wq); | |
2f67a069 | 789 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 790 | } |
4be44fcd | 791 | |
1da177e4 LT |
792 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
793 | ||
794 | /* | |
795 | * Allocate the memory for a spinlock and initialize it. | |
796 | */ | |
967440e3 | 797 | acpi_status acpi_os_create_lock(acpi_spinlock * handle) |
1da177e4 | 798 | { |
967440e3 | 799 | spin_lock_init(*handle); |
1da177e4 | 800 | |
d550d98d | 801 | return AE_OK; |
1da177e4 LT |
802 | } |
803 | ||
1da177e4 LT |
804 | /* |
805 | * Deallocate the memory for a spinlock. | |
806 | */ | |
967440e3 | 807 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 808 | { |
d550d98d | 809 | return; |
1da177e4 LT |
810 | } |
811 | ||
1da177e4 | 812 | acpi_status |
4be44fcd | 813 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 814 | { |
4be44fcd | 815 | struct semaphore *sem = NULL; |
1da177e4 | 816 | |
1da177e4 LT |
817 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
818 | if (!sem) | |
d550d98d | 819 | return AE_NO_MEMORY; |
1da177e4 LT |
820 | memset(sem, 0, sizeof(struct semaphore)); |
821 | ||
822 | sema_init(sem, initial_units); | |
823 | ||
4be44fcd | 824 | *handle = (acpi_handle *) sem; |
1da177e4 | 825 | |
4be44fcd LB |
826 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
827 | *handle, initial_units)); | |
1da177e4 | 828 | |
d550d98d | 829 | return AE_OK; |
1da177e4 | 830 | } |
1da177e4 | 831 | |
1da177e4 LT |
832 | /* |
833 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
834 | * 'delete_semaphore()' function -- may result in an invalid | |
835 | * pointer dereference for non-synchronized consumers. Should | |
836 | * we at least check for blocked threads and signal/cancel them? | |
837 | */ | |
838 | ||
4be44fcd | 839 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 840 | { |
4be44fcd | 841 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 842 | |
1da177e4 | 843 | if (!sem) |
d550d98d | 844 | return AE_BAD_PARAMETER; |
1da177e4 | 845 | |
4be44fcd | 846 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 847 | |
f1241c87 | 848 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 849 | kfree(sem); |
4be44fcd | 850 | sem = NULL; |
1da177e4 | 851 | |
d550d98d | 852 | return AE_OK; |
1da177e4 | 853 | } |
1da177e4 | 854 | |
1da177e4 | 855 | /* |
1da177e4 LT |
856 | * TODO: Support for units > 1? |
857 | */ | |
4be44fcd | 858 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 859 | { |
4be44fcd LB |
860 | acpi_status status = AE_OK; |
861 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 862 | long jiffies; |
4be44fcd | 863 | int ret = 0; |
1da177e4 | 864 | |
1da177e4 | 865 | if (!sem || (units < 1)) |
d550d98d | 866 | return AE_BAD_PARAMETER; |
1da177e4 LT |
867 | |
868 | if (units > 1) | |
d550d98d | 869 | return AE_SUPPORT; |
1da177e4 | 870 | |
4be44fcd LB |
871 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
872 | handle, units, timeout)); | |
1da177e4 | 873 | |
f1241c87 MW |
874 | if (timeout == ACPI_WAIT_FOREVER) |
875 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
876 | else | |
877 | jiffies = msecs_to_jiffies(timeout); | |
878 | ||
879 | ret = down_timeout(sem, jiffies); | |
880 | if (ret) | |
881 | status = AE_TIME; | |
1da177e4 LT |
882 | |
883 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 884 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 885 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
886 | handle, units, timeout, |
887 | acpi_format_exception(status))); | |
888 | } else { | |
889 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 890 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 891 | units, timeout)); |
1da177e4 LT |
892 | } |
893 | ||
d550d98d | 894 | return status; |
1da177e4 | 895 | } |
1da177e4 | 896 | |
1da177e4 LT |
897 | /* |
898 | * TODO: Support for units > 1? | |
899 | */ | |
4be44fcd | 900 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 901 | { |
4be44fcd | 902 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 903 | |
1da177e4 | 904 | if (!sem || (units < 1)) |
d550d98d | 905 | return AE_BAD_PARAMETER; |
1da177e4 LT |
906 | |
907 | if (units > 1) | |
d550d98d | 908 | return AE_SUPPORT; |
1da177e4 | 909 | |
4be44fcd LB |
910 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
911 | units)); | |
1da177e4 LT |
912 | |
913 | up(sem); | |
914 | ||
d550d98d | 915 | return AE_OK; |
1da177e4 | 916 | } |
4be44fcd | 917 | |
1da177e4 | 918 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 919 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
920 | { |
921 | ||
922 | #ifdef ENABLE_DEBUGGER | |
923 | if (acpi_in_debugger) { | |
924 | u32 chars; | |
925 | ||
926 | kdb_read(buffer, sizeof(line_buf)); | |
927 | ||
928 | /* remove the CR kdb includes */ | |
929 | chars = strlen(buffer) - 1; | |
930 | buffer[chars] = '\0'; | |
931 | } | |
932 | #endif | |
933 | ||
934 | return 0; | |
935 | } | |
4be44fcd | 936 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 937 | |
4be44fcd | 938 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 939 | { |
4be44fcd | 940 | switch (function) { |
1da177e4 LT |
941 | case ACPI_SIGNAL_FATAL: |
942 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
943 | break; | |
944 | case ACPI_SIGNAL_BREAKPOINT: | |
945 | /* | |
946 | * AML Breakpoint | |
947 | * ACPI spec. says to treat it as a NOP unless | |
948 | * you are debugging. So if/when we integrate | |
949 | * AML debugger into the kernel debugger its | |
950 | * hook will go here. But until then it is | |
951 | * not useful to print anything on breakpoints. | |
952 | */ | |
953 | break; | |
954 | default: | |
955 | break; | |
956 | } | |
957 | ||
958 | return AE_OK; | |
959 | } | |
4be44fcd | 960 | |
4be44fcd | 961 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
962 | { |
963 | char *p = acpi_os_name; | |
4be44fcd | 964 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
965 | |
966 | if (!str || !*str) | |
967 | return 0; | |
968 | ||
969 | for (; count-- && str && *str; str++) { | |
970 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
971 | *p++ = *str; | |
972 | else if (*str == '\'' || *str == '"') | |
973 | continue; | |
974 | else | |
975 | break; | |
976 | } | |
977 | *p = 0; | |
978 | ||
979 | return 1; | |
4be44fcd | 980 | |
1da177e4 LT |
981 | } |
982 | ||
983 | __setup("acpi_os_name=", acpi_os_name_setup); | |
984 | ||
d4b7dc49 LB |
985 | static void __init set_osi_linux(unsigned int enable) |
986 | { | |
987 | if (osi_linux.enable != enable) { | |
988 | osi_linux.enable = enable; | |
989 | printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", | |
990 | enable ? "Add": "Delet"); | |
991 | } | |
992 | return; | |
993 | } | |
994 | ||
995 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
996 | { | |
997 | osi_linux.cmdline = 1; /* cmdline set the default */ | |
998 | set_osi_linux(enable); | |
999 | ||
1000 | return; | |
1001 | } | |
1002 | ||
1003 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1004 | { | |
1005 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ | |
1006 | ||
1007 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); | |
1008 | ||
1009 | if (enable == -1) | |
1010 | return; | |
1011 | ||
1012 | osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ | |
f507654d | 1013 | |
d4b7dc49 | 1014 | set_osi_linux(enable); |
f507654d | 1015 | |
f507654d LB |
1016 | return; |
1017 | } | |
1018 | ||
1da177e4 | 1019 | /* |
ae00d812 LB |
1020 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1021 | * | |
1da177e4 | 1022 | * empty string disables _OSI |
ae00d812 LB |
1023 | * string starting with '!' disables that string |
1024 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1025 | */ |
46c1fbdb | 1026 | int __init acpi_osi_setup(char *str) |
1da177e4 LT |
1027 | { |
1028 | if (str == NULL || *str == '\0') { | |
1029 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1030 | acpi_gbl_create_osi_method = FALSE; | |
aa2e09da | 1031 | } else if (!strcmp("!Linux", str)) { |
d4b7dc49 | 1032 | acpi_cmdline_osi_linux(0); /* !enable */ |
ae00d812 LB |
1033 | } else if (*str == '!') { |
1034 | if (acpi_osi_invalidate(++str) == AE_OK) | |
1035 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
f507654d | 1036 | } else if (!strcmp("Linux", str)) { |
d4b7dc49 | 1037 | acpi_cmdline_osi_linux(1); /* enable */ |
ae00d812 LB |
1038 | } else if (*osi_additional_string == '\0') { |
1039 | strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); | |
1040 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1da177e4 LT |
1041 | } |
1042 | ||
1043 | return 1; | |
1044 | } | |
1045 | ||
1046 | __setup("acpi_osi=", acpi_osi_setup); | |
1047 | ||
1048 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1049 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1050 | { |
1051 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1052 | ||
1053 | acpi_gbl_all_methods_serialized = TRUE; | |
1054 | ||
1055 | return 1; | |
1056 | } | |
1057 | ||
1058 | __setup("acpi_serialize", acpi_serialize_setup); | |
1059 | ||
1060 | /* | |
1061 | * Wake and Run-Time GPES are expected to be separate. | |
1062 | * We disable wake-GPEs at run-time to prevent spurious | |
1063 | * interrupts. | |
1064 | * | |
1065 | * However, if a system exists that shares Wake and | |
1066 | * Run-time events on the same GPE this flag is available | |
1067 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1068 | */ | |
4be44fcd | 1069 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1070 | { |
1071 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1072 | ||
1073 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1074 | ||
1075 | return 1; | |
1076 | } | |
1077 | ||
1078 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1079 | ||
df92e695 TR |
1080 | /* Check of resource interference between native drivers and ACPI |
1081 | * OperationRegions (SystemIO and System Memory only). | |
1082 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1083 | * in arbitrary AML code and can interfere with legacy drivers. | |
1084 | * acpi_enforce_resources= can be set to: | |
1085 | * | |
7e90560c | 1086 | * - strict (default) (2) |
df92e695 | 1087 | * -> further driver trying to access the resources will not load |
7e90560c | 1088 | * - lax (1) |
df92e695 TR |
1089 | * -> further driver trying to access the resources will load, but you |
1090 | * get a system message that something might go wrong... | |
1091 | * | |
1092 | * - no (0) | |
1093 | * -> ACPI Operation Region resources will not be registered | |
1094 | * | |
1095 | */ | |
1096 | #define ENFORCE_RESOURCES_STRICT 2 | |
1097 | #define ENFORCE_RESOURCES_LAX 1 | |
1098 | #define ENFORCE_RESOURCES_NO 0 | |
1099 | ||
7e90560c | 1100 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1101 | |
1102 | static int __init acpi_enforce_resources_setup(char *str) | |
1103 | { | |
1104 | if (str == NULL || *str == '\0') | |
1105 | return 0; | |
1106 | ||
1107 | if (!strcmp("strict", str)) | |
1108 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1109 | else if (!strcmp("lax", str)) | |
1110 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1111 | else if (!strcmp("no", str)) | |
1112 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1113 | ||
1114 | return 1; | |
1115 | } | |
1116 | ||
1117 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1118 | ||
1119 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1120 | * drivers */ | |
876fba43 | 1121 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 TR |
1122 | { |
1123 | struct acpi_res_list *res_list_elem; | |
1124 | int ioport; | |
1125 | int clash = 0; | |
1126 | ||
1127 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1128 | return 0; | |
1129 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1130 | return 0; | |
1131 | ||
1132 | ioport = res->flags & IORESOURCE_IO; | |
1133 | ||
1134 | spin_lock(&acpi_res_lock); | |
1135 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1136 | resource_list) { | |
1137 | if (ioport && (res_list_elem->resource_type | |
1138 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1139 | continue; | |
1140 | if (!ioport && (res_list_elem->resource_type | |
1141 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1142 | continue; | |
1143 | ||
1144 | if (res->end < res_list_elem->start | |
1145 | || res_list_elem->end < res->start) | |
1146 | continue; | |
1147 | clash = 1; | |
1148 | break; | |
1149 | } | |
1150 | spin_unlock(&acpi_res_lock); | |
1151 | ||
1152 | if (clash) { | |
1153 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
bd12935f | 1154 | printk("%sACPI: %s resource %s [0x%llx-0x%llx]" |
df92e695 TR |
1155 | " conflicts with ACPI region %s" |
1156 | " [0x%llx-0x%llx]\n", | |
1157 | acpi_enforce_resources == ENFORCE_RESOURCES_LAX | |
1158 | ? KERN_WARNING : KERN_ERR, | |
1159 | ioport ? "I/O" : "Memory", res->name, | |
1160 | (long long) res->start, (long long) res->end, | |
1161 | res_list_elem->name, | |
1162 | (long long) res_list_elem->start, | |
1163 | (long long) res_list_elem->end); | |
14f03343 JD |
1164 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1165 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1166 | " cause random problems and system" | |
1167 | " instability\n"); | |
1168 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1169 | " for this device, you should use it instead of" | |
1170 | " the native driver\n"); | |
df92e695 TR |
1171 | } |
1172 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1173 | return -EBUSY; | |
1174 | } | |
1175 | return 0; | |
1176 | } | |
443dea72 | 1177 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1178 | |
1179 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1180 | const char *name) | |
1181 | { | |
1182 | struct resource res = { | |
1183 | .start = start, | |
1184 | .end = start + n - 1, | |
1185 | .name = name, | |
1186 | .flags = IORESOURCE_IO, | |
1187 | }; | |
1188 | ||
1189 | return acpi_check_resource_conflict(&res); | |
1190 | } | |
1191 | EXPORT_SYMBOL(acpi_check_region); | |
1192 | ||
1193 | int acpi_check_mem_region(resource_size_t start, resource_size_t n, | |
1194 | const char *name) | |
1195 | { | |
1196 | struct resource res = { | |
1197 | .start = start, | |
1198 | .end = start + n - 1, | |
1199 | .name = name, | |
1200 | .flags = IORESOURCE_MEM, | |
1201 | }; | |
1202 | ||
1203 | return acpi_check_resource_conflict(&res); | |
1204 | ||
1205 | } | |
1206 | EXPORT_SYMBOL(acpi_check_mem_region); | |
1207 | ||
73459f73 RM |
1208 | /* |
1209 | * Acquire a spinlock. | |
1210 | * | |
1211 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1212 | */ |
1213 | ||
967440e3 | 1214 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1215 | { |
b8e4d893 | 1216 | acpi_cpu_flags flags; |
967440e3 | 1217 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1218 | return flags; |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * Release a spinlock. See above. | |
1223 | */ | |
1224 | ||
967440e3 | 1225 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1226 | { |
967440e3 | 1227 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1228 | } |
1229 | ||
73459f73 RM |
1230 | #ifndef ACPI_USE_LOCAL_CACHE |
1231 | ||
1232 | /******************************************************************************* | |
1233 | * | |
1234 | * FUNCTION: acpi_os_create_cache | |
1235 | * | |
b229cf92 BM |
1236 | * PARAMETERS: name - Ascii name for the cache |
1237 | * size - Size of each cached object | |
1238 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1239 | * cache - Where the new cache object is returned | |
73459f73 | 1240 | * |
b229cf92 | 1241 | * RETURN: status |
73459f73 RM |
1242 | * |
1243 | * DESCRIPTION: Create a cache object | |
1244 | * | |
1245 | ******************************************************************************/ | |
1246 | ||
1247 | acpi_status | |
4be44fcd | 1248 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1249 | { |
20c2df83 | 1250 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1251 | if (*cache == NULL) |
b229cf92 BM |
1252 | return AE_ERROR; |
1253 | else | |
1254 | return AE_OK; | |
73459f73 RM |
1255 | } |
1256 | ||
1257 | /******************************************************************************* | |
1258 | * | |
1259 | * FUNCTION: acpi_os_purge_cache | |
1260 | * | |
1261 | * PARAMETERS: Cache - Handle to cache object | |
1262 | * | |
1263 | * RETURN: Status | |
1264 | * | |
1265 | * DESCRIPTION: Free all objects within the requested cache. | |
1266 | * | |
1267 | ******************************************************************************/ | |
1268 | ||
4be44fcd | 1269 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1270 | { |
50dd0969 | 1271 | kmem_cache_shrink(cache); |
4be44fcd | 1272 | return (AE_OK); |
73459f73 RM |
1273 | } |
1274 | ||
1275 | /******************************************************************************* | |
1276 | * | |
1277 | * FUNCTION: acpi_os_delete_cache | |
1278 | * | |
1279 | * PARAMETERS: Cache - Handle to cache object | |
1280 | * | |
1281 | * RETURN: Status | |
1282 | * | |
1283 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1284 | * cache object. | |
1285 | * | |
1286 | ******************************************************************************/ | |
1287 | ||
4be44fcd | 1288 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1289 | { |
1a1d92c1 | 1290 | kmem_cache_destroy(cache); |
4be44fcd | 1291 | return (AE_OK); |
73459f73 RM |
1292 | } |
1293 | ||
1294 | /******************************************************************************* | |
1295 | * | |
1296 | * FUNCTION: acpi_os_release_object | |
1297 | * | |
1298 | * PARAMETERS: Cache - Handle to cache object | |
1299 | * Object - The object to be released | |
1300 | * | |
1301 | * RETURN: None | |
1302 | * | |
1303 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1304 | * the object is deleted. | |
1305 | * | |
1306 | ******************************************************************************/ | |
1307 | ||
4be44fcd | 1308 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1309 | { |
4be44fcd LB |
1310 | kmem_cache_free(cache, object); |
1311 | return (AE_OK); | |
73459f73 RM |
1312 | } |
1313 | ||
b229cf92 BM |
1314 | /****************************************************************************** |
1315 | * | |
1316 | * FUNCTION: acpi_os_validate_interface | |
1317 | * | |
1318 | * PARAMETERS: interface - Requested interface to be validated | |
1319 | * | |
1320 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1321 | * | |
1322 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1323 | * host. Strings originate from an AML call to the _OSI method. | |
1324 | * | |
1325 | *****************************************************************************/ | |
1326 | ||
1327 | acpi_status | |
1328 | acpi_os_validate_interface (char *interface) | |
1329 | { | |
ae00d812 LB |
1330 | if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) |
1331 | return AE_OK; | |
f507654d | 1332 | if (!strcmp("Linux", interface)) { |
d4b7dc49 | 1333 | |
f40cd6fd | 1334 | printk(KERN_NOTICE PREFIX |
d4b7dc49 LB |
1335 | "BIOS _OSI(Linux) query %s%s\n", |
1336 | osi_linux.enable ? "honored" : "ignored", | |
1337 | osi_linux.cmdline ? " via cmdline" : | |
1338 | osi_linux.dmi ? " via DMI" : ""); | |
1339 | ||
d4b7dc49 | 1340 | if (osi_linux.enable) |
f507654d LB |
1341 | return AE_OK; |
1342 | } | |
ae00d812 | 1343 | return AE_SUPPORT; |
b229cf92 BM |
1344 | } |
1345 | ||
a5fe1a03 LM |
1346 | static inline int acpi_res_list_add(struct acpi_res_list *res) |
1347 | { | |
1348 | struct acpi_res_list *res_list_elem; | |
1349 | ||
1350 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1351 | resource_list) { | |
1352 | ||
1353 | if (res->resource_type == res_list_elem->resource_type && | |
1354 | res->start == res_list_elem->start && | |
1355 | res->end == res_list_elem->end) { | |
1356 | ||
1357 | /* | |
1358 | * The Region(addr,len) already exist in the list, | |
1359 | * just increase the count | |
1360 | */ | |
1361 | ||
1362 | res_list_elem->count++; | |
1363 | return 0; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | res->count = 1; | |
1368 | list_add(&res->resource_list, &resource_list_head); | |
1369 | return 1; | |
1370 | } | |
1371 | ||
1372 | static inline void acpi_res_list_del(struct acpi_res_list *res) | |
1373 | { | |
1374 | struct acpi_res_list *res_list_elem; | |
1375 | ||
1376 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1377 | resource_list) { | |
1378 | ||
1379 | if (res->resource_type == res_list_elem->resource_type && | |
1380 | res->start == res_list_elem->start && | |
1381 | res->end == res_list_elem->end) { | |
1382 | ||
1383 | /* | |
1384 | * If the res count is decreased to 0, | |
1385 | * remove and free it | |
1386 | */ | |
1387 | ||
1388 | if (--res_list_elem->count == 0) { | |
1389 | list_del(&res_list_elem->resource_list); | |
1390 | kfree(res_list_elem); | |
1391 | } | |
1392 | return; | |
1393 | } | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | acpi_status | |
1398 | acpi_os_invalidate_address( | |
1399 | u8 space_id, | |
1400 | acpi_physical_address address, | |
1401 | acpi_size length) | |
1402 | { | |
1403 | struct acpi_res_list res; | |
1404 | ||
1405 | switch (space_id) { | |
1406 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1407 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
1408 | /* Only interference checks against SystemIO and SytemMemory | |
1409 | are needed */ | |
1410 | res.start = address; | |
1411 | res.end = address + length - 1; | |
1412 | res.resource_type = space_id; | |
1413 | spin_lock(&acpi_res_lock); | |
1414 | acpi_res_list_del(&res); | |
1415 | spin_unlock(&acpi_res_lock); | |
1416 | break; | |
1417 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1418 | case ACPI_ADR_SPACE_EC: | |
1419 | case ACPI_ADR_SPACE_SMBUS: | |
1420 | case ACPI_ADR_SPACE_CMOS: | |
1421 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1422 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1423 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1424 | break; | |
1425 | } | |
1426 | return AE_OK; | |
1427 | } | |
1428 | ||
b229cf92 BM |
1429 | /****************************************************************************** |
1430 | * | |
1431 | * FUNCTION: acpi_os_validate_address | |
1432 | * | |
1433 | * PARAMETERS: space_id - ACPI space ID | |
1434 | * address - Physical address | |
1435 | * length - Address length | |
1436 | * | |
1437 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1438 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1439 | * | |
1440 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1441 | * the addresses accessed by AML operation regions. | |
1442 | * | |
1443 | *****************************************************************************/ | |
1444 | ||
1445 | acpi_status | |
1446 | acpi_os_validate_address ( | |
1447 | u8 space_id, | |
1448 | acpi_physical_address address, | |
df92e695 TR |
1449 | acpi_size length, |
1450 | char *name) | |
b229cf92 | 1451 | { |
df92e695 | 1452 | struct acpi_res_list *res; |
a5fe1a03 | 1453 | int added; |
df92e695 TR |
1454 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
1455 | return AE_OK; | |
b229cf92 | 1456 | |
df92e695 TR |
1457 | switch (space_id) { |
1458 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1459 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
1460 | /* Only interference checks against SystemIO and SytemMemory | |
1461 | are needed */ | |
1462 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1463 | if (!res) | |
1464 | return AE_OK; | |
1465 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1466 | strlcpy(res->name, name, 5); | |
1467 | res->start = address; | |
1468 | res->end = address + length - 1; | |
1469 | res->resource_type = space_id; | |
1470 | spin_lock(&acpi_res_lock); | |
a5fe1a03 | 1471 | added = acpi_res_list_add(res); |
df92e695 | 1472 | spin_unlock(&acpi_res_lock); |
a5fe1a03 LM |
1473 | pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " |
1474 | "name: %s\n", added ? "Added" : "Already exist", | |
1475 | (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
df92e695 TR |
1476 | ? "SystemIO" : "System Memory", |
1477 | (unsigned long long)res->start, | |
1478 | (unsigned long long)res->end, | |
1479 | res->name); | |
a5fe1a03 LM |
1480 | if (!added) |
1481 | kfree(res); | |
df92e695 TR |
1482 | break; |
1483 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1484 | case ACPI_ADR_SPACE_EC: | |
1485 | case ACPI_ADR_SPACE_SMBUS: | |
1486 | case ACPI_ADR_SPACE_CMOS: | |
1487 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1488 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1489 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1490 | break; | |
1491 | } | |
1492 | return AE_OK; | |
b229cf92 BM |
1493 | } |
1494 | ||
73459f73 | 1495 | #endif |