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1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/pci.h> | |
1da177e4 LT |
35 | #include <linux/interrupt.h> |
36 | #include <linux/kmod.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/nmi.h> | |
ad71860a | 40 | #include <linux/acpi.h> |
1da177e4 | 41 | #include <linux/efi.h> |
df92e695 TR |
42 | #include <linux/ioport.h> |
43 | #include <linux/list.h> | |
f1241c87 MW |
44 | #include <linux/jiffies.h> |
45 | #include <linux/semaphore.h> | |
46 | ||
47 | #include <asm/io.h> | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include <acpi/acpi.h> | |
51 | #include <acpi/acpi_bus.h> | |
52 | #include <acpi/processor.h> | |
1da177e4 | 53 | |
1da177e4 | 54 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 55 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 56 | #define PREFIX "ACPI: " |
4be44fcd LB |
57 | struct acpi_os_dpc { |
58 | acpi_osd_exec_callback function; | |
59 | void *context; | |
65f27f38 | 60 | struct work_struct work; |
1da177e4 LT |
61 | }; |
62 | ||
63 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
64 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
65 | #endif | |
66 | ||
67 | #ifdef ENABLE_DEBUGGER | |
68 | #include <linux/kdb.h> | |
69 | ||
70 | /* stuff for debugger support */ | |
71 | int acpi_in_debugger; | |
72 | EXPORT_SYMBOL(acpi_in_debugger); | |
73 | ||
74 | extern char line_buf[80]; | |
4be44fcd | 75 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 LT |
76 | |
77 | static unsigned int acpi_irq_irq; | |
78 | static acpi_osd_handler acpi_irq_handler; | |
79 | static void *acpi_irq_context; | |
80 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 81 | static struct workqueue_struct *kacpi_notify_wq; |
c02256be | 82 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 83 | |
df92e695 TR |
84 | struct acpi_res_list { |
85 | resource_size_t start; | |
86 | resource_size_t end; | |
87 | acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ | |
88 | char name[5]; /* only can have a length of 4 chars, make use of this | |
89 | one instead of res->name, no need to kalloc then */ | |
90 | struct list_head resource_list; | |
91 | }; | |
92 | ||
93 | static LIST_HEAD(resource_list_head); | |
94 | static DEFINE_SPINLOCK(acpi_res_lock); | |
95 | ||
ae00d812 LB |
96 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
97 | static char osi_additional_string[OSI_STRING_LENGTH_MAX]; | |
98 | ||
d4b7dc49 | 99 | /* |
a6e0887f | 100 | * The story of _OSI(Linux) |
d4b7dc49 | 101 | * |
a6e0887f LB |
102 | * From pre-history through Linux-2.6.22, |
103 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 104 | * |
a6e0887f LB |
105 | * Unfortunately, reference BIOS writers got wind of this |
106 | * and put OSI(Linux) in their example code, quickly exposing | |
107 | * this string as ill-conceived and opening the door to | |
108 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 109 | * |
a6e0887f LB |
110 | * For example, OSI(Linux) was used on resume to re-POST a |
111 | * video card on one system, because Linux at that time | |
112 | * could not do a speedy restore in its native driver. | |
113 | * But then upon gaining quick native restore capability, | |
114 | * Linux has no way to tell the BIOS to skip the time-consuming | |
115 | * POST -- putting Linux at a permanent performance disadvantage. | |
116 | * On another system, the BIOS writer used OSI(Linux) | |
117 | * to infer native OS support for IPMI! On other systems, | |
118 | * OSI(Linux) simply got in the way of Linux claiming to | |
119 | * be compatible with other operating systems, exposing | |
120 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 121 | * |
a6e0887f LB |
122 | * So "Linux" turned out to be a really poor chose of |
123 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
124 | * |
125 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
126 | * Linux will complain on the console when it sees it, and return FALSE. |
127 | * To get Linux to return TRUE for your system will require | |
128 | * a kernel source update to add a DMI entry, | |
129 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 130 | */ |
d4b7dc49 | 131 | |
1d15d84e | 132 | static struct osi_linux { |
d4b7dc49 LB |
133 | unsigned int enable:1; |
134 | unsigned int dmi:1; | |
135 | unsigned int cmdline:1; | |
136 | unsigned int known:1; | |
a6e0887f | 137 | } osi_linux = { 0, 0, 0, 0}; |
f507654d | 138 | |
9a47cdb1 BH |
139 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
140 | unsigned int length, char *desc) | |
141 | { | |
142 | struct resource *res; | |
143 | ||
144 | if (!addr->address || !length) | |
145 | return; | |
146 | ||
eee3c859 | 147 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
9a47cdb1 | 148 | res = request_region(addr->address, length, desc); |
eee3c859 | 149 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
9a47cdb1 BH |
150 | res = request_mem_region(addr->address, length, desc); |
151 | } | |
152 | ||
153 | static int __init acpi_reserve_resources(void) | |
154 | { | |
eee3c859 | 155 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
156 | "ACPI PM1a_EVT_BLK"); |
157 | ||
eee3c859 | 158 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
159 | "ACPI PM1b_EVT_BLK"); |
160 | ||
eee3c859 | 161 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
162 | "ACPI PM1a_CNT_BLK"); |
163 | ||
eee3c859 | 164 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
165 | "ACPI PM1b_CNT_BLK"); |
166 | ||
eee3c859 LB |
167 | if (acpi_gbl_FADT.pm_timer_length == 4) |
168 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 169 | |
eee3c859 | 170 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
171 | "ACPI PM2_CNT_BLK"); |
172 | ||
173 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
174 | ||
eee3c859 LB |
175 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
176 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
177 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 178 | |
eee3c859 LB |
179 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
180 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
181 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
182 | |
183 | return 0; | |
184 | } | |
185 | device_initcall(acpi_reserve_resources); | |
186 | ||
dd272b57 | 187 | acpi_status __init acpi_os_initialize(void) |
1da177e4 LT |
188 | { |
189 | return AE_OK; | |
190 | } | |
191 | ||
74b58208 BH |
192 | static void bind_to_cpu0(struct work_struct *work) |
193 | { | |
194 | set_cpus_allowed(current, cpumask_of_cpu(0)); | |
195 | kfree(work); | |
196 | } | |
197 | ||
198 | static void bind_workqueue(struct workqueue_struct *wq) | |
199 | { | |
200 | struct work_struct *work; | |
201 | ||
202 | work = kzalloc(sizeof(struct work_struct), GFP_KERNEL); | |
203 | INIT_WORK(work, bind_to_cpu0); | |
204 | queue_work(wq, work); | |
205 | } | |
206 | ||
4be44fcd | 207 | acpi_status acpi_os_initialize1(void) |
1da177e4 | 208 | { |
74b58208 BH |
209 | /* |
210 | * On some machines, a software-initiated SMI causes corruption unless | |
211 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
212 | * typically it's done in GPE-related methods that are run via | |
213 | * workqueues, so we can avoid the known corruption cases by binding | |
214 | * the workqueues to CPU 0. | |
215 | */ | |
1da177e4 | 216 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
74b58208 | 217 | bind_workqueue(kacpid_wq); |
88db5e14 | 218 | kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); |
74b58208 | 219 | bind_workqueue(kacpi_notify_wq); |
c02256be | 220 | kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug"); |
74b58208 | 221 | bind_workqueue(kacpi_hotplug_wq); |
1da177e4 | 222 | BUG_ON(!kacpid_wq); |
88db5e14 | 223 | BUG_ON(!kacpi_notify_wq); |
c02256be | 224 | BUG_ON(!kacpi_hotplug_wq); |
1da177e4 LT |
225 | return AE_OK; |
226 | } | |
227 | ||
4be44fcd | 228 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
229 | { |
230 | if (acpi_irq_handler) { | |
231 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
232 | acpi_irq_handler); | |
233 | } | |
234 | ||
235 | destroy_workqueue(kacpid_wq); | |
88db5e14 | 236 | destroy_workqueue(kacpi_notify_wq); |
c02256be | 237 | destroy_workqueue(kacpi_hotplug_wq); |
1da177e4 LT |
238 | |
239 | return AE_OK; | |
240 | } | |
241 | ||
4be44fcd | 242 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
243 | { |
244 | va_list args; | |
245 | va_start(args, fmt); | |
246 | acpi_os_vprintf(fmt, args); | |
247 | va_end(args); | |
248 | } | |
4be44fcd | 249 | |
4be44fcd | 250 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
251 | { |
252 | static char buffer[512]; | |
4be44fcd | 253 | |
1da177e4 LT |
254 | vsprintf(buffer, fmt, args); |
255 | ||
256 | #ifdef ENABLE_DEBUGGER | |
257 | if (acpi_in_debugger) { | |
258 | kdb_printf("%s", buffer); | |
259 | } else { | |
4d939155 | 260 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
261 | } |
262 | #else | |
4d939155 | 263 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
264 | #endif |
265 | } | |
266 | ||
ad71860a | 267 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 LT |
268 | { |
269 | if (efi_enabled) { | |
b2c99e3c | 270 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 271 | return efi.acpi20; |
b2c99e3c | 272 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 273 | return efi.acpi; |
1da177e4 | 274 | else { |
4be44fcd LB |
275 | printk(KERN_ERR PREFIX |
276 | "System description tables not found\n"); | |
ad71860a | 277 | return 0; |
1da177e4 | 278 | } |
239665a3 LB |
279 | } else { |
280 | acpi_physical_address pa = 0; | |
281 | ||
282 | acpi_find_root_pointer(&pa); | |
283 | return pa; | |
284 | } | |
1da177e4 LT |
285 | } |
286 | ||
2fdf0741 JB |
287 | void __iomem *__init_refok |
288 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 289 | { |
9f4fd61f BH |
290 | if (phys > ULONG_MAX) { |
291 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 292 | return NULL; |
1da177e4 | 293 | } |
ad71860a AS |
294 | if (acpi_gbl_permanent_mmap) |
295 | /* | |
296 | * ioremap checks to ensure this is in reserved space | |
297 | */ | |
298 | return ioremap((unsigned long)phys, size); | |
299 | else | |
300 | return __acpi_map_table((unsigned long)phys, size); | |
1da177e4 | 301 | } |
55a82ab3 | 302 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 303 | |
0d3a9cf5 | 304 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 305 | { |
7d97277b | 306 | if (acpi_gbl_permanent_mmap) |
ad71860a | 307 | iounmap(virt); |
7d97277b YL |
308 | else |
309 | __acpi_unmap_table(virt, size); | |
1da177e4 | 310 | } |
55a82ab3 | 311 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 312 | |
0d3a9cf5 | 313 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
314 | { |
315 | if (!acpi_gbl_permanent_mmap) | |
316 | __acpi_unmap_table(virt, size); | |
317 | } | |
318 | ||
1da177e4 LT |
319 | #ifdef ACPI_FUTURE_USAGE |
320 | acpi_status | |
4be44fcd | 321 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 322 | { |
4be44fcd | 323 | if (!phys || !virt) |
1da177e4 LT |
324 | return AE_BAD_PARAMETER; |
325 | ||
326 | *phys = virt_to_phys(virt); | |
327 | ||
328 | return AE_OK; | |
329 | } | |
330 | #endif | |
331 | ||
332 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
333 | ||
334 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
335 | ||
336 | acpi_status | |
4be44fcd LB |
337 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
338 | acpi_string * new_val) | |
1da177e4 LT |
339 | { |
340 | if (!init_val || !new_val) | |
341 | return AE_BAD_PARAMETER; | |
342 | ||
343 | *new_val = NULL; | |
4be44fcd | 344 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 345 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 346 | acpi_os_name); |
1da177e4 LT |
347 | *new_val = acpi_os_name; |
348 | } | |
349 | ||
350 | return AE_OK; | |
351 | } | |
352 | ||
353 | acpi_status | |
4be44fcd LB |
354 | acpi_os_table_override(struct acpi_table_header * existing_table, |
355 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
356 | { |
357 | if (!existing_table || !new_table) | |
358 | return AE_BAD_PARAMETER; | |
359 | ||
71fc47a9 MG |
360 | *new_table = NULL; |
361 | ||
1da177e4 LT |
362 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
363 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 364 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 365 | #endif |
6ed31e92 ÉP |
366 | if (*new_table != NULL) { |
367 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
368 | "this is unsafe: tainting kernel\n", | |
369 | existing_table->signature, | |
370 | existing_table->oem_table_id); | |
371 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
372 | } | |
1da177e4 LT |
373 | return AE_OK; |
374 | } | |
375 | ||
7d12e780 | 376 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 377 | { |
5229e87d LB |
378 | u32 handled; |
379 | ||
380 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
381 | ||
382 | if (handled) { | |
383 | acpi_irq_handled++; | |
384 | return IRQ_HANDLED; | |
88bea188 LB |
385 | } else { |
386 | acpi_irq_not_handled++; | |
5229e87d | 387 | return IRQ_NONE; |
88bea188 | 388 | } |
1da177e4 LT |
389 | } |
390 | ||
391 | acpi_status | |
4be44fcd LB |
392 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
393 | void *context) | |
1da177e4 LT |
394 | { |
395 | unsigned int irq; | |
396 | ||
5229e87d LB |
397 | acpi_irq_stats_init(); |
398 | ||
1da177e4 LT |
399 | /* |
400 | * Ignore the GSI from the core, and use the value in our copy of the | |
401 | * FADT. It may not be the same if an interrupt source override exists | |
402 | * for the SCI. | |
403 | */ | |
cee324b1 | 404 | gsi = acpi_gbl_FADT.sci_interrupt; |
1da177e4 LT |
405 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
406 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
407 | gsi); | |
408 | return AE_OK; | |
409 | } | |
410 | ||
411 | acpi_irq_handler = handler; | |
412 | acpi_irq_context = context; | |
dace1453 | 413 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
414 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
415 | return AE_NOT_ACQUIRED; | |
416 | } | |
417 | acpi_irq_irq = irq; | |
418 | ||
419 | return AE_OK; | |
420 | } | |
421 | ||
4be44fcd | 422 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
423 | { |
424 | if (irq) { | |
425 | free_irq(irq, acpi_irq); | |
426 | acpi_irq_handler = NULL; | |
427 | acpi_irq_irq = 0; | |
428 | } | |
429 | ||
430 | return AE_OK; | |
431 | } | |
432 | ||
433 | /* | |
434 | * Running in interpreter thread context, safe to sleep | |
435 | */ | |
436 | ||
4be44fcd | 437 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 | 438 | { |
01a527ec | 439 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 440 | } |
4be44fcd | 441 | |
4be44fcd | 442 | void acpi_os_stall(u32 us) |
1da177e4 LT |
443 | { |
444 | while (us) { | |
445 | u32 delay = 1000; | |
446 | ||
447 | if (delay > us) | |
448 | delay = us; | |
449 | udelay(delay); | |
450 | touch_nmi_watchdog(); | |
451 | us -= delay; | |
452 | } | |
453 | } | |
4be44fcd | 454 | |
1da177e4 LT |
455 | /* |
456 | * Support ACPI 3.0 AML Timer operand | |
457 | * Returns 64-bit free-running, monotonically increasing timer | |
458 | * with 100ns granularity | |
459 | */ | |
4be44fcd | 460 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
461 | { |
462 | static u64 t; | |
463 | ||
464 | #ifdef CONFIG_HPET | |
465 | /* TBD: use HPET if available */ | |
466 | #endif | |
467 | ||
468 | #ifdef CONFIG_X86_PM_TIMER | |
469 | /* TBD: default to PM timer if HPET was not available */ | |
470 | #endif | |
471 | if (!t) | |
472 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
473 | ||
474 | return ++t; | |
475 | } | |
476 | ||
4be44fcd | 477 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
478 | { |
479 | u32 dummy; | |
480 | ||
481 | if (!value) | |
482 | value = &dummy; | |
483 | ||
49fbabf5 ZY |
484 | *value = 0; |
485 | if (width <= 8) { | |
4be44fcd | 486 | *(u8 *) value = inb(port); |
49fbabf5 | 487 | } else if (width <= 16) { |
4be44fcd | 488 | *(u16 *) value = inw(port); |
49fbabf5 | 489 | } else if (width <= 32) { |
4be44fcd | 490 | *(u32 *) value = inl(port); |
49fbabf5 | 491 | } else { |
1da177e4 LT |
492 | BUG(); |
493 | } | |
494 | ||
495 | return AE_OK; | |
496 | } | |
4be44fcd | 497 | |
1da177e4 LT |
498 | EXPORT_SYMBOL(acpi_os_read_port); |
499 | ||
4be44fcd | 500 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 501 | { |
49fbabf5 | 502 | if (width <= 8) { |
1da177e4 | 503 | outb(value, port); |
49fbabf5 | 504 | } else if (width <= 16) { |
1da177e4 | 505 | outw(value, port); |
49fbabf5 | 506 | } else if (width <= 32) { |
1da177e4 | 507 | outl(value, port); |
49fbabf5 | 508 | } else { |
1da177e4 LT |
509 | BUG(); |
510 | } | |
511 | ||
512 | return AE_OK; | |
513 | } | |
4be44fcd | 514 | |
1da177e4 LT |
515 | EXPORT_SYMBOL(acpi_os_write_port); |
516 | ||
517 | acpi_status | |
4be44fcd | 518 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 519 | { |
4be44fcd LB |
520 | u32 dummy; |
521 | void __iomem *virt_addr; | |
1da177e4 | 522 | |
9f4fd61f | 523 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
524 | if (!value) |
525 | value = &dummy; | |
526 | ||
527 | switch (width) { | |
528 | case 8: | |
4be44fcd | 529 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
530 | break; |
531 | case 16: | |
4be44fcd | 532 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
533 | break; |
534 | case 32: | |
4be44fcd | 535 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
536 | break; |
537 | default: | |
538 | BUG(); | |
539 | } | |
540 | ||
9f4fd61f | 541 | iounmap(virt_addr); |
1da177e4 LT |
542 | |
543 | return AE_OK; | |
544 | } | |
545 | ||
546 | acpi_status | |
4be44fcd | 547 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 548 | { |
4be44fcd | 549 | void __iomem *virt_addr; |
1da177e4 | 550 | |
9f4fd61f | 551 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
552 | |
553 | switch (width) { | |
554 | case 8: | |
555 | writeb(value, virt_addr); | |
556 | break; | |
557 | case 16: | |
558 | writew(value, virt_addr); | |
559 | break; | |
560 | case 32: | |
561 | writel(value, virt_addr); | |
562 | break; | |
563 | default: | |
564 | BUG(); | |
565 | } | |
566 | ||
9f4fd61f | 567 | iounmap(virt_addr); |
1da177e4 LT |
568 | |
569 | return AE_OK; | |
570 | } | |
571 | ||
1da177e4 | 572 | acpi_status |
4be44fcd | 573 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
10270d48 | 574 | u32 *value, u32 width) |
1da177e4 LT |
575 | { |
576 | int result, size; | |
577 | ||
578 | if (!value) | |
579 | return AE_BAD_PARAMETER; | |
580 | ||
581 | switch (width) { | |
582 | case 8: | |
583 | size = 1; | |
584 | break; | |
585 | case 16: | |
586 | size = 2; | |
587 | break; | |
588 | case 32: | |
589 | size = 4; | |
590 | break; | |
591 | default: | |
592 | return AE_ERROR; | |
593 | } | |
594 | ||
b6ce068a MW |
595 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
596 | PCI_DEVFN(pci_id->device, pci_id->function), | |
597 | reg, size, value); | |
1da177e4 LT |
598 | |
599 | return (result ? AE_ERROR : AE_OK); | |
600 | } | |
4be44fcd | 601 | |
1da177e4 | 602 | acpi_status |
4be44fcd LB |
603 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
604 | acpi_integer value, u32 width) | |
1da177e4 LT |
605 | { |
606 | int result, size; | |
607 | ||
608 | switch (width) { | |
609 | case 8: | |
610 | size = 1; | |
611 | break; | |
612 | case 16: | |
613 | size = 2; | |
614 | break; | |
615 | case 32: | |
616 | size = 4; | |
617 | break; | |
618 | default: | |
619 | return AE_ERROR; | |
620 | } | |
621 | ||
b6ce068a MW |
622 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
623 | PCI_DEVFN(pci_id->device, pci_id->function), | |
624 | reg, size, value); | |
1da177e4 LT |
625 | |
626 | return (result ? AE_ERROR : AE_OK); | |
627 | } | |
628 | ||
629 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
630 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
631 | acpi_handle chandle, /* current node */ | |
632 | struct acpi_pci_id **id, | |
633 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 634 | { |
4be44fcd LB |
635 | acpi_handle handle; |
636 | struct acpi_pci_id *pci_id = *id; | |
637 | acpi_status status; | |
27663c58 | 638 | unsigned long long temp; |
4be44fcd | 639 | acpi_object_type type; |
1da177e4 LT |
640 | |
641 | acpi_get_parent(chandle, &handle); | |
642 | if (handle != rhandle) { | |
4be44fcd LB |
643 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
644 | bus_number); | |
1da177e4 LT |
645 | |
646 | status = acpi_get_type(handle, &type); | |
4be44fcd | 647 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
648 | return; |
649 | ||
27663c58 | 650 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, |
4be44fcd | 651 | &temp); |
1da177e4 | 652 | if (ACPI_SUCCESS(status)) { |
10270d48 | 653 | u32 val; |
4be44fcd LB |
654 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
655 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
656 | |
657 | if (*is_bridge) | |
658 | pci_id->bus = *bus_number; | |
659 | ||
660 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd | 661 | status = |
10270d48 | 662 | acpi_os_read_pci_configuration(pci_id, 0x0e, &val, |
4be44fcd LB |
663 | 8); |
664 | if (ACPI_SUCCESS(status) | |
10270d48 | 665 | && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) { |
4be44fcd LB |
666 | status = |
667 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
10270d48 | 668 | &val, 8); |
1da177e4 LT |
669 | if (!ACPI_SUCCESS(status)) { |
670 | /* Certainly broken... FIX ME */ | |
671 | return; | |
672 | } | |
673 | *is_bridge = 1; | |
10270d48 | 674 | pci_id->bus = val; |
4be44fcd LB |
675 | status = |
676 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
10270d48 | 677 | &val, 8); |
1da177e4 | 678 | if (ACPI_SUCCESS(status)) { |
10270d48 | 679 | *bus_number = val; |
1da177e4 LT |
680 | } |
681 | } else | |
682 | *is_bridge = 0; | |
683 | } | |
684 | } | |
685 | } | |
686 | ||
4be44fcd LB |
687 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
688 | acpi_handle chandle, /* current node */ | |
689 | struct acpi_pci_id **id) | |
1da177e4 LT |
690 | { |
691 | int is_bridge = 1; | |
692 | u8 bus_number = (*id)->bus; | |
693 | ||
694 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
695 | } | |
696 | ||
65f27f38 | 697 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
698 | { |
699 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
700 | if (!dpc) { | |
701 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
702 | return; | |
703 | } | |
704 | ||
705 | dpc->function(dpc->context); | |
706 | kfree(dpc); | |
707 | ||
d550d98d | 708 | return; |
1da177e4 LT |
709 | } |
710 | ||
19cd847a ZR |
711 | static void acpi_os_execute_hp_deferred(struct work_struct *work) |
712 | { | |
713 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
714 | if (!dpc) { | |
715 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
716 | return; | |
717 | } | |
718 | ||
719 | acpi_os_wait_events_complete(NULL); | |
720 | ||
721 | dpc->function(dpc->context); | |
722 | kfree(dpc); | |
723 | ||
724 | return; | |
725 | } | |
726 | ||
b8d35192 AS |
727 | /******************************************************************************* |
728 | * | |
729 | * FUNCTION: acpi_os_execute | |
730 | * | |
731 | * PARAMETERS: Type - Type of the callback | |
732 | * Function - Function to be executed | |
733 | * Context - Function parameters | |
734 | * | |
735 | * RETURN: Status | |
736 | * | |
737 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
738 | * immediately executes function on a separate thread. | |
739 | * | |
740 | ******************************************************************************/ | |
741 | ||
19cd847a ZR |
742 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
743 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 744 | { |
4be44fcd LB |
745 | acpi_status status = AE_OK; |
746 | struct acpi_os_dpc *dpc; | |
17bc54ee | 747 | struct workqueue_struct *queue; |
c02256be | 748 | work_func_t func; |
19cd847a | 749 | int ret; |
72945b2b LB |
750 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
751 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
752 | function, context)); | |
1da177e4 LT |
753 | |
754 | if (!function) | |
88db5e14 | 755 | return AE_BAD_PARAMETER; |
72945b2b | 756 | |
1da177e4 LT |
757 | /* |
758 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 759 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
760 | * way that allows us to also free its memory inside the callee. |
761 | * Because we may want to schedule several tasks with different | |
762 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 763 | * having a static work_struct. |
1da177e4 | 764 | */ |
72945b2b | 765 | |
65f27f38 | 766 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 767 | if (!dpc) |
889c78be | 768 | return AE_NO_MEMORY; |
b976fe19 | 769 | |
1da177e4 LT |
770 | dpc->function = function; |
771 | dpc->context = context; | |
b976fe19 | 772 | |
c02256be ZR |
773 | /* |
774 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
775 | * because the hotplug code may call driver .remove() functions, | |
776 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
777 | * to flush these workqueues. | |
778 | */ | |
779 | queue = hp ? kacpi_hotplug_wq : | |
780 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
781 | func = hp ? acpi_os_execute_hp_deferred : acpi_os_execute_deferred; | |
782 | INIT_WORK(&dpc->work, func); | |
783 | ret = queue_work(queue, &dpc->work); | |
19cd847a ZR |
784 | |
785 | if (!ret) { | |
55ac9a01 LM |
786 | printk(KERN_ERR PREFIX |
787 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
788 | status = AE_ERROR; |
789 | kfree(dpc); | |
1da177e4 | 790 | } |
889c78be | 791 | return status; |
1da177e4 | 792 | } |
4be44fcd | 793 | |
19cd847a ZR |
794 | acpi_status acpi_os_execute(acpi_execute_type type, |
795 | acpi_osd_exec_callback function, void *context) | |
796 | { | |
797 | return __acpi_os_execute(type, function, context, 0); | |
798 | } | |
b8d35192 | 799 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 800 | |
19cd847a ZR |
801 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
802 | void *context) | |
803 | { | |
804 | return __acpi_os_execute(0, function, context, 1); | |
805 | } | |
806 | ||
4be44fcd | 807 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
808 | { |
809 | flush_workqueue(kacpid_wq); | |
2f67a069 | 810 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 811 | } |
4be44fcd | 812 | |
1da177e4 LT |
813 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
814 | ||
815 | /* | |
816 | * Allocate the memory for a spinlock and initialize it. | |
817 | */ | |
967440e3 | 818 | acpi_status acpi_os_create_lock(acpi_spinlock * handle) |
1da177e4 | 819 | { |
967440e3 | 820 | spin_lock_init(*handle); |
1da177e4 | 821 | |
d550d98d | 822 | return AE_OK; |
1da177e4 LT |
823 | } |
824 | ||
1da177e4 LT |
825 | /* |
826 | * Deallocate the memory for a spinlock. | |
827 | */ | |
967440e3 | 828 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 829 | { |
d550d98d | 830 | return; |
1da177e4 LT |
831 | } |
832 | ||
1da177e4 | 833 | acpi_status |
4be44fcd | 834 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 835 | { |
4be44fcd | 836 | struct semaphore *sem = NULL; |
1da177e4 | 837 | |
1da177e4 LT |
838 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
839 | if (!sem) | |
d550d98d | 840 | return AE_NO_MEMORY; |
1da177e4 LT |
841 | memset(sem, 0, sizeof(struct semaphore)); |
842 | ||
843 | sema_init(sem, initial_units); | |
844 | ||
4be44fcd | 845 | *handle = (acpi_handle *) sem; |
1da177e4 | 846 | |
4be44fcd LB |
847 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
848 | *handle, initial_units)); | |
1da177e4 | 849 | |
d550d98d | 850 | return AE_OK; |
1da177e4 | 851 | } |
1da177e4 | 852 | |
1da177e4 LT |
853 | /* |
854 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
855 | * 'delete_semaphore()' function -- may result in an invalid | |
856 | * pointer dereference for non-synchronized consumers. Should | |
857 | * we at least check for blocked threads and signal/cancel them? | |
858 | */ | |
859 | ||
4be44fcd | 860 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 861 | { |
4be44fcd | 862 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 863 | |
1da177e4 | 864 | if (!sem) |
d550d98d | 865 | return AE_BAD_PARAMETER; |
1da177e4 | 866 | |
4be44fcd | 867 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 868 | |
f1241c87 | 869 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 870 | kfree(sem); |
4be44fcd | 871 | sem = NULL; |
1da177e4 | 872 | |
d550d98d | 873 | return AE_OK; |
1da177e4 | 874 | } |
1da177e4 | 875 | |
1da177e4 | 876 | /* |
1da177e4 LT |
877 | * TODO: Support for units > 1? |
878 | */ | |
4be44fcd | 879 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 880 | { |
4be44fcd LB |
881 | acpi_status status = AE_OK; |
882 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 883 | long jiffies; |
4be44fcd | 884 | int ret = 0; |
1da177e4 | 885 | |
1da177e4 | 886 | if (!sem || (units < 1)) |
d550d98d | 887 | return AE_BAD_PARAMETER; |
1da177e4 LT |
888 | |
889 | if (units > 1) | |
d550d98d | 890 | return AE_SUPPORT; |
1da177e4 | 891 | |
4be44fcd LB |
892 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
893 | handle, units, timeout)); | |
1da177e4 | 894 | |
f1241c87 MW |
895 | if (timeout == ACPI_WAIT_FOREVER) |
896 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
897 | else | |
898 | jiffies = msecs_to_jiffies(timeout); | |
899 | ||
900 | ret = down_timeout(sem, jiffies); | |
901 | if (ret) | |
902 | status = AE_TIME; | |
1da177e4 LT |
903 | |
904 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 905 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 906 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
907 | handle, units, timeout, |
908 | acpi_format_exception(status))); | |
909 | } else { | |
910 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 911 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 912 | units, timeout)); |
1da177e4 LT |
913 | } |
914 | ||
d550d98d | 915 | return status; |
1da177e4 | 916 | } |
1da177e4 | 917 | |
1da177e4 LT |
918 | /* |
919 | * TODO: Support for units > 1? | |
920 | */ | |
4be44fcd | 921 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 922 | { |
4be44fcd | 923 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 924 | |
1da177e4 | 925 | if (!sem || (units < 1)) |
d550d98d | 926 | return AE_BAD_PARAMETER; |
1da177e4 LT |
927 | |
928 | if (units > 1) | |
d550d98d | 929 | return AE_SUPPORT; |
1da177e4 | 930 | |
4be44fcd LB |
931 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
932 | units)); | |
1da177e4 LT |
933 | |
934 | up(sem); | |
935 | ||
d550d98d | 936 | return AE_OK; |
1da177e4 | 937 | } |
4be44fcd | 938 | |
1da177e4 | 939 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 940 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
941 | { |
942 | ||
943 | #ifdef ENABLE_DEBUGGER | |
944 | if (acpi_in_debugger) { | |
945 | u32 chars; | |
946 | ||
947 | kdb_read(buffer, sizeof(line_buf)); | |
948 | ||
949 | /* remove the CR kdb includes */ | |
950 | chars = strlen(buffer) - 1; | |
951 | buffer[chars] = '\0'; | |
952 | } | |
953 | #endif | |
954 | ||
955 | return 0; | |
956 | } | |
4be44fcd | 957 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 958 | |
4be44fcd | 959 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 960 | { |
4be44fcd | 961 | switch (function) { |
1da177e4 LT |
962 | case ACPI_SIGNAL_FATAL: |
963 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
964 | break; | |
965 | case ACPI_SIGNAL_BREAKPOINT: | |
966 | /* | |
967 | * AML Breakpoint | |
968 | * ACPI spec. says to treat it as a NOP unless | |
969 | * you are debugging. So if/when we integrate | |
970 | * AML debugger into the kernel debugger its | |
971 | * hook will go here. But until then it is | |
972 | * not useful to print anything on breakpoints. | |
973 | */ | |
974 | break; | |
975 | default: | |
976 | break; | |
977 | } | |
978 | ||
979 | return AE_OK; | |
980 | } | |
4be44fcd | 981 | |
4be44fcd | 982 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
983 | { |
984 | char *p = acpi_os_name; | |
4be44fcd | 985 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
986 | |
987 | if (!str || !*str) | |
988 | return 0; | |
989 | ||
990 | for (; count-- && str && *str; str++) { | |
991 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
992 | *p++ = *str; | |
993 | else if (*str == '\'' || *str == '"') | |
994 | continue; | |
995 | else | |
996 | break; | |
997 | } | |
998 | *p = 0; | |
999 | ||
1000 | return 1; | |
4be44fcd | 1001 | |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1005 | ||
d4b7dc49 LB |
1006 | static void __init set_osi_linux(unsigned int enable) |
1007 | { | |
1008 | if (osi_linux.enable != enable) { | |
1009 | osi_linux.enable = enable; | |
1010 | printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", | |
1011 | enable ? "Add": "Delet"); | |
1012 | } | |
1013 | return; | |
1014 | } | |
1015 | ||
1016 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1017 | { | |
1018 | osi_linux.cmdline = 1; /* cmdline set the default */ | |
1019 | set_osi_linux(enable); | |
1020 | ||
1021 | return; | |
1022 | } | |
1023 | ||
1024 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1025 | { | |
1026 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ | |
1027 | ||
1028 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); | |
1029 | ||
1030 | if (enable == -1) | |
1031 | return; | |
1032 | ||
1033 | osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ | |
f507654d | 1034 | |
d4b7dc49 | 1035 | set_osi_linux(enable); |
f507654d | 1036 | |
f507654d LB |
1037 | return; |
1038 | } | |
1039 | ||
1da177e4 | 1040 | /* |
ae00d812 LB |
1041 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1042 | * | |
1da177e4 | 1043 | * empty string disables _OSI |
ae00d812 LB |
1044 | * string starting with '!' disables that string |
1045 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1046 | */ |
46c1fbdb | 1047 | int __init acpi_osi_setup(char *str) |
1da177e4 LT |
1048 | { |
1049 | if (str == NULL || *str == '\0') { | |
1050 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1051 | acpi_gbl_create_osi_method = FALSE; | |
aa2e09da | 1052 | } else if (!strcmp("!Linux", str)) { |
d4b7dc49 | 1053 | acpi_cmdline_osi_linux(0); /* !enable */ |
ae00d812 LB |
1054 | } else if (*str == '!') { |
1055 | if (acpi_osi_invalidate(++str) == AE_OK) | |
1056 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
f507654d | 1057 | } else if (!strcmp("Linux", str)) { |
d4b7dc49 | 1058 | acpi_cmdline_osi_linux(1); /* enable */ |
ae00d812 LB |
1059 | } else if (*osi_additional_string == '\0') { |
1060 | strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); | |
1061 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1da177e4 LT |
1062 | } |
1063 | ||
1064 | return 1; | |
1065 | } | |
1066 | ||
1067 | __setup("acpi_osi=", acpi_osi_setup); | |
1068 | ||
1069 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1070 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1071 | { |
1072 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1073 | ||
1074 | acpi_gbl_all_methods_serialized = TRUE; | |
1075 | ||
1076 | return 1; | |
1077 | } | |
1078 | ||
1079 | __setup("acpi_serialize", acpi_serialize_setup); | |
1080 | ||
1081 | /* | |
1082 | * Wake and Run-Time GPES are expected to be separate. | |
1083 | * We disable wake-GPEs at run-time to prevent spurious | |
1084 | * interrupts. | |
1085 | * | |
1086 | * However, if a system exists that shares Wake and | |
1087 | * Run-time events on the same GPE this flag is available | |
1088 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1089 | */ | |
4be44fcd | 1090 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1091 | { |
1092 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1093 | ||
1094 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1095 | ||
1096 | return 1; | |
1097 | } | |
1098 | ||
1099 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1100 | ||
df92e695 TR |
1101 | /* Check of resource interference between native drivers and ACPI |
1102 | * OperationRegions (SystemIO and System Memory only). | |
1103 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1104 | * in arbitrary AML code and can interfere with legacy drivers. | |
1105 | * acpi_enforce_resources= can be set to: | |
1106 | * | |
7e90560c | 1107 | * - strict (default) (2) |
df92e695 | 1108 | * -> further driver trying to access the resources will not load |
7e90560c | 1109 | * - lax (1) |
df92e695 TR |
1110 | * -> further driver trying to access the resources will load, but you |
1111 | * get a system message that something might go wrong... | |
1112 | * | |
1113 | * - no (0) | |
1114 | * -> ACPI Operation Region resources will not be registered | |
1115 | * | |
1116 | */ | |
1117 | #define ENFORCE_RESOURCES_STRICT 2 | |
1118 | #define ENFORCE_RESOURCES_LAX 1 | |
1119 | #define ENFORCE_RESOURCES_NO 0 | |
1120 | ||
7e90560c | 1121 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1122 | |
1123 | static int __init acpi_enforce_resources_setup(char *str) | |
1124 | { | |
1125 | if (str == NULL || *str == '\0') | |
1126 | return 0; | |
1127 | ||
1128 | if (!strcmp("strict", str)) | |
1129 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1130 | else if (!strcmp("lax", str)) | |
1131 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1132 | else if (!strcmp("no", str)) | |
1133 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1134 | ||
1135 | return 1; | |
1136 | } | |
1137 | ||
1138 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1139 | ||
1140 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1141 | * drivers */ | |
443dea72 | 1142 | int acpi_check_resource_conflict(struct resource *res) |
df92e695 TR |
1143 | { |
1144 | struct acpi_res_list *res_list_elem; | |
1145 | int ioport; | |
1146 | int clash = 0; | |
1147 | ||
1148 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1149 | return 0; | |
1150 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1151 | return 0; | |
1152 | ||
1153 | ioport = res->flags & IORESOURCE_IO; | |
1154 | ||
1155 | spin_lock(&acpi_res_lock); | |
1156 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1157 | resource_list) { | |
1158 | if (ioport && (res_list_elem->resource_type | |
1159 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1160 | continue; | |
1161 | if (!ioport && (res_list_elem->resource_type | |
1162 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1163 | continue; | |
1164 | ||
1165 | if (res->end < res_list_elem->start | |
1166 | || res_list_elem->end < res->start) | |
1167 | continue; | |
1168 | clash = 1; | |
1169 | break; | |
1170 | } | |
1171 | spin_unlock(&acpi_res_lock); | |
1172 | ||
1173 | if (clash) { | |
1174 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
bd12935f | 1175 | printk("%sACPI: %s resource %s [0x%llx-0x%llx]" |
df92e695 TR |
1176 | " conflicts with ACPI region %s" |
1177 | " [0x%llx-0x%llx]\n", | |
1178 | acpi_enforce_resources == ENFORCE_RESOURCES_LAX | |
1179 | ? KERN_WARNING : KERN_ERR, | |
1180 | ioport ? "I/O" : "Memory", res->name, | |
1181 | (long long) res->start, (long long) res->end, | |
1182 | res_list_elem->name, | |
1183 | (long long) res_list_elem->start, | |
1184 | (long long) res_list_elem->end); | |
1185 | printk(KERN_INFO "ACPI: Device needs an ACPI driver\n"); | |
1186 | } | |
1187 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1188 | return -EBUSY; | |
1189 | } | |
1190 | return 0; | |
1191 | } | |
443dea72 | 1192 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1193 | |
1194 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1195 | const char *name) | |
1196 | { | |
1197 | struct resource res = { | |
1198 | .start = start, | |
1199 | .end = start + n - 1, | |
1200 | .name = name, | |
1201 | .flags = IORESOURCE_IO, | |
1202 | }; | |
1203 | ||
1204 | return acpi_check_resource_conflict(&res); | |
1205 | } | |
1206 | EXPORT_SYMBOL(acpi_check_region); | |
1207 | ||
1208 | int acpi_check_mem_region(resource_size_t start, resource_size_t n, | |
1209 | const char *name) | |
1210 | { | |
1211 | struct resource res = { | |
1212 | .start = start, | |
1213 | .end = start + n - 1, | |
1214 | .name = name, | |
1215 | .flags = IORESOURCE_MEM, | |
1216 | }; | |
1217 | ||
1218 | return acpi_check_resource_conflict(&res); | |
1219 | ||
1220 | } | |
1221 | EXPORT_SYMBOL(acpi_check_mem_region); | |
1222 | ||
73459f73 RM |
1223 | /* |
1224 | * Acquire a spinlock. | |
1225 | * | |
1226 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1227 | */ |
1228 | ||
967440e3 | 1229 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1230 | { |
b8e4d893 | 1231 | acpi_cpu_flags flags; |
967440e3 | 1232 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1233 | return flags; |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | * Release a spinlock. See above. | |
1238 | */ | |
1239 | ||
967440e3 | 1240 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1241 | { |
967440e3 | 1242 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1243 | } |
1244 | ||
73459f73 RM |
1245 | #ifndef ACPI_USE_LOCAL_CACHE |
1246 | ||
1247 | /******************************************************************************* | |
1248 | * | |
1249 | * FUNCTION: acpi_os_create_cache | |
1250 | * | |
b229cf92 BM |
1251 | * PARAMETERS: name - Ascii name for the cache |
1252 | * size - Size of each cached object | |
1253 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1254 | * cache - Where the new cache object is returned | |
73459f73 | 1255 | * |
b229cf92 | 1256 | * RETURN: status |
73459f73 RM |
1257 | * |
1258 | * DESCRIPTION: Create a cache object | |
1259 | * | |
1260 | ******************************************************************************/ | |
1261 | ||
1262 | acpi_status | |
4be44fcd | 1263 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1264 | { |
20c2df83 | 1265 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1266 | if (*cache == NULL) |
b229cf92 BM |
1267 | return AE_ERROR; |
1268 | else | |
1269 | return AE_OK; | |
73459f73 RM |
1270 | } |
1271 | ||
1272 | /******************************************************************************* | |
1273 | * | |
1274 | * FUNCTION: acpi_os_purge_cache | |
1275 | * | |
1276 | * PARAMETERS: Cache - Handle to cache object | |
1277 | * | |
1278 | * RETURN: Status | |
1279 | * | |
1280 | * DESCRIPTION: Free all objects within the requested cache. | |
1281 | * | |
1282 | ******************************************************************************/ | |
1283 | ||
4be44fcd | 1284 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1285 | { |
50dd0969 | 1286 | kmem_cache_shrink(cache); |
4be44fcd | 1287 | return (AE_OK); |
73459f73 RM |
1288 | } |
1289 | ||
1290 | /******************************************************************************* | |
1291 | * | |
1292 | * FUNCTION: acpi_os_delete_cache | |
1293 | * | |
1294 | * PARAMETERS: Cache - Handle to cache object | |
1295 | * | |
1296 | * RETURN: Status | |
1297 | * | |
1298 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1299 | * cache object. | |
1300 | * | |
1301 | ******************************************************************************/ | |
1302 | ||
4be44fcd | 1303 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1304 | { |
1a1d92c1 | 1305 | kmem_cache_destroy(cache); |
4be44fcd | 1306 | return (AE_OK); |
73459f73 RM |
1307 | } |
1308 | ||
1309 | /******************************************************************************* | |
1310 | * | |
1311 | * FUNCTION: acpi_os_release_object | |
1312 | * | |
1313 | * PARAMETERS: Cache - Handle to cache object | |
1314 | * Object - The object to be released | |
1315 | * | |
1316 | * RETURN: None | |
1317 | * | |
1318 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1319 | * the object is deleted. | |
1320 | * | |
1321 | ******************************************************************************/ | |
1322 | ||
4be44fcd | 1323 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1324 | { |
4be44fcd LB |
1325 | kmem_cache_free(cache, object); |
1326 | return (AE_OK); | |
73459f73 RM |
1327 | } |
1328 | ||
b229cf92 BM |
1329 | /****************************************************************************** |
1330 | * | |
1331 | * FUNCTION: acpi_os_validate_interface | |
1332 | * | |
1333 | * PARAMETERS: interface - Requested interface to be validated | |
1334 | * | |
1335 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1336 | * | |
1337 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1338 | * host. Strings originate from an AML call to the _OSI method. | |
1339 | * | |
1340 | *****************************************************************************/ | |
1341 | ||
1342 | acpi_status | |
1343 | acpi_os_validate_interface (char *interface) | |
1344 | { | |
ae00d812 LB |
1345 | if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) |
1346 | return AE_OK; | |
f507654d | 1347 | if (!strcmp("Linux", interface)) { |
d4b7dc49 | 1348 | |
f40cd6fd | 1349 | printk(KERN_NOTICE PREFIX |
d4b7dc49 LB |
1350 | "BIOS _OSI(Linux) query %s%s\n", |
1351 | osi_linux.enable ? "honored" : "ignored", | |
1352 | osi_linux.cmdline ? " via cmdline" : | |
1353 | osi_linux.dmi ? " via DMI" : ""); | |
1354 | ||
d4b7dc49 | 1355 | if (osi_linux.enable) |
f507654d LB |
1356 | return AE_OK; |
1357 | } | |
ae00d812 | 1358 | return AE_SUPPORT; |
b229cf92 BM |
1359 | } |
1360 | ||
b229cf92 BM |
1361 | /****************************************************************************** |
1362 | * | |
1363 | * FUNCTION: acpi_os_validate_address | |
1364 | * | |
1365 | * PARAMETERS: space_id - ACPI space ID | |
1366 | * address - Physical address | |
1367 | * length - Address length | |
1368 | * | |
1369 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1370 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1371 | * | |
1372 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1373 | * the addresses accessed by AML operation regions. | |
1374 | * | |
1375 | *****************************************************************************/ | |
1376 | ||
1377 | acpi_status | |
1378 | acpi_os_validate_address ( | |
1379 | u8 space_id, | |
1380 | acpi_physical_address address, | |
df92e695 TR |
1381 | acpi_size length, |
1382 | char *name) | |
b229cf92 | 1383 | { |
df92e695 TR |
1384 | struct acpi_res_list *res; |
1385 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1386 | return AE_OK; | |
b229cf92 | 1387 | |
df92e695 TR |
1388 | switch (space_id) { |
1389 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1390 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
1391 | /* Only interference checks against SystemIO and SytemMemory | |
1392 | are needed */ | |
1393 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1394 | if (!res) | |
1395 | return AE_OK; | |
1396 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1397 | strlcpy(res->name, name, 5); | |
1398 | res->start = address; | |
1399 | res->end = address + length - 1; | |
1400 | res->resource_type = space_id; | |
1401 | spin_lock(&acpi_res_lock); | |
1402 | list_add(&res->resource_list, &resource_list_head); | |
1403 | spin_unlock(&acpi_res_lock); | |
1404 | pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, " | |
1405 | "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
1406 | ? "SystemIO" : "System Memory", | |
1407 | (unsigned long long)res->start, | |
1408 | (unsigned long long)res->end, | |
1409 | res->name); | |
1410 | break; | |
1411 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1412 | case ACPI_ADR_SPACE_EC: | |
1413 | case ACPI_ADR_SPACE_SMBUS: | |
1414 | case ACPI_ADR_SPACE_CMOS: | |
1415 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1416 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1417 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1418 | break; | |
1419 | } | |
1420 | return AE_OK; | |
b229cf92 BM |
1421 | } |
1422 | ||
73459f73 | 1423 | #endif |