]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/pci.h> | |
1da177e4 LT |
35 | #include <linux/interrupt.h> |
36 | #include <linux/kmod.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/nmi.h> | |
ad71860a | 40 | #include <linux/acpi.h> |
1da177e4 | 41 | #include <linux/efi.h> |
df92e695 TR |
42 | #include <linux/ioport.h> |
43 | #include <linux/list.h> | |
f1241c87 MW |
44 | #include <linux/jiffies.h> |
45 | #include <linux/semaphore.h> | |
46 | ||
47 | #include <asm/io.h> | |
48 | #include <asm/uaccess.h> | |
49 | ||
50 | #include <acpi/acpi.h> | |
51 | #include <acpi/acpi_bus.h> | |
52 | #include <acpi/processor.h> | |
1da177e4 | 53 | |
1da177e4 | 54 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 55 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 56 | #define PREFIX "ACPI: " |
4be44fcd LB |
57 | struct acpi_os_dpc { |
58 | acpi_osd_exec_callback function; | |
59 | void *context; | |
65f27f38 | 60 | struct work_struct work; |
9ac61856 | 61 | int wait; |
1da177e4 LT |
62 | }; |
63 | ||
64 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
65 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
66 | #endif | |
67 | ||
68 | #ifdef ENABLE_DEBUGGER | |
69 | #include <linux/kdb.h> | |
70 | ||
71 | /* stuff for debugger support */ | |
72 | int acpi_in_debugger; | |
73 | EXPORT_SYMBOL(acpi_in_debugger); | |
74 | ||
75 | extern char line_buf[80]; | |
4be44fcd | 76 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 LT |
77 | |
78 | static unsigned int acpi_irq_irq; | |
79 | static acpi_osd_handler acpi_irq_handler; | |
80 | static void *acpi_irq_context; | |
81 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 82 | static struct workqueue_struct *kacpi_notify_wq; |
c02256be | 83 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 84 | |
df92e695 TR |
85 | struct acpi_res_list { |
86 | resource_size_t start; | |
87 | resource_size_t end; | |
88 | acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ | |
89 | char name[5]; /* only can have a length of 4 chars, make use of this | |
90 | one instead of res->name, no need to kalloc then */ | |
91 | struct list_head resource_list; | |
a5fe1a03 | 92 | int count; |
df92e695 TR |
93 | }; |
94 | ||
95 | static LIST_HEAD(resource_list_head); | |
96 | static DEFINE_SPINLOCK(acpi_res_lock); | |
97 | ||
ae00d812 LB |
98 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
99 | static char osi_additional_string[OSI_STRING_LENGTH_MAX]; | |
100 | ||
d4b7dc49 | 101 | /* |
a6e0887f | 102 | * The story of _OSI(Linux) |
d4b7dc49 | 103 | * |
a6e0887f LB |
104 | * From pre-history through Linux-2.6.22, |
105 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 106 | * |
a6e0887f LB |
107 | * Unfortunately, reference BIOS writers got wind of this |
108 | * and put OSI(Linux) in their example code, quickly exposing | |
109 | * this string as ill-conceived and opening the door to | |
110 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 111 | * |
a6e0887f LB |
112 | * For example, OSI(Linux) was used on resume to re-POST a |
113 | * video card on one system, because Linux at that time | |
114 | * could not do a speedy restore in its native driver. | |
115 | * But then upon gaining quick native restore capability, | |
116 | * Linux has no way to tell the BIOS to skip the time-consuming | |
117 | * POST -- putting Linux at a permanent performance disadvantage. | |
118 | * On another system, the BIOS writer used OSI(Linux) | |
119 | * to infer native OS support for IPMI! On other systems, | |
120 | * OSI(Linux) simply got in the way of Linux claiming to | |
121 | * be compatible with other operating systems, exposing | |
122 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 123 | * |
a6e0887f LB |
124 | * So "Linux" turned out to be a really poor chose of |
125 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
126 | * |
127 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
128 | * Linux will complain on the console when it sees it, and return FALSE. |
129 | * To get Linux to return TRUE for your system will require | |
130 | * a kernel source update to add a DMI entry, | |
131 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 132 | */ |
d4b7dc49 | 133 | |
1d15d84e | 134 | static struct osi_linux { |
d4b7dc49 LB |
135 | unsigned int enable:1; |
136 | unsigned int dmi:1; | |
137 | unsigned int cmdline:1; | |
138 | unsigned int known:1; | |
a6e0887f | 139 | } osi_linux = { 0, 0, 0, 0}; |
f507654d | 140 | |
9a47cdb1 BH |
141 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
142 | unsigned int length, char *desc) | |
143 | { | |
9a47cdb1 BH |
144 | if (!addr->address || !length) |
145 | return; | |
146 | ||
cfa806f0 | 147 | /* Resources are never freed */ |
eee3c859 | 148 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
cfa806f0 | 149 | request_region(addr->address, length, desc); |
eee3c859 | 150 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
cfa806f0 | 151 | request_mem_region(addr->address, length, desc); |
9a47cdb1 BH |
152 | } |
153 | ||
154 | static int __init acpi_reserve_resources(void) | |
155 | { | |
eee3c859 | 156 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
157 | "ACPI PM1a_EVT_BLK"); |
158 | ||
eee3c859 | 159 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
160 | "ACPI PM1b_EVT_BLK"); |
161 | ||
eee3c859 | 162 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
163 | "ACPI PM1a_CNT_BLK"); |
164 | ||
eee3c859 | 165 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
166 | "ACPI PM1b_CNT_BLK"); |
167 | ||
eee3c859 LB |
168 | if (acpi_gbl_FADT.pm_timer_length == 4) |
169 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 170 | |
eee3c859 | 171 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
172 | "ACPI PM2_CNT_BLK"); |
173 | ||
174 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
175 | ||
eee3c859 LB |
176 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
177 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
178 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 179 | |
eee3c859 LB |
180 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
181 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
182 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
183 | |
184 | return 0; | |
185 | } | |
186 | device_initcall(acpi_reserve_resources); | |
187 | ||
dd272b57 | 188 | acpi_status __init acpi_os_initialize(void) |
1da177e4 LT |
189 | { |
190 | return AE_OK; | |
191 | } | |
192 | ||
74b58208 BH |
193 | static void bind_to_cpu0(struct work_struct *work) |
194 | { | |
e68110fb | 195 | set_cpus_allowed_ptr(current, cpumask_of(0)); |
74b58208 BH |
196 | kfree(work); |
197 | } | |
198 | ||
199 | static void bind_workqueue(struct workqueue_struct *wq) | |
200 | { | |
201 | struct work_struct *work; | |
202 | ||
203 | work = kzalloc(sizeof(struct work_struct), GFP_KERNEL); | |
204 | INIT_WORK(work, bind_to_cpu0); | |
205 | queue_work(wq, work); | |
206 | } | |
207 | ||
4be44fcd | 208 | acpi_status acpi_os_initialize1(void) |
1da177e4 | 209 | { |
74b58208 BH |
210 | /* |
211 | * On some machines, a software-initiated SMI causes corruption unless | |
212 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
213 | * typically it's done in GPE-related methods that are run via | |
214 | * workqueues, so we can avoid the known corruption cases by binding | |
215 | * the workqueues to CPU 0. | |
216 | */ | |
1da177e4 | 217 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
74b58208 | 218 | bind_workqueue(kacpid_wq); |
88db5e14 | 219 | kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); |
74b58208 | 220 | bind_workqueue(kacpi_notify_wq); |
c02256be | 221 | kacpi_hotplug_wq = create_singlethread_workqueue("kacpi_hotplug"); |
74b58208 | 222 | bind_workqueue(kacpi_hotplug_wq); |
1da177e4 | 223 | BUG_ON(!kacpid_wq); |
88db5e14 | 224 | BUG_ON(!kacpi_notify_wq); |
c02256be | 225 | BUG_ON(!kacpi_hotplug_wq); |
1da177e4 LT |
226 | return AE_OK; |
227 | } | |
228 | ||
4be44fcd | 229 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
230 | { |
231 | if (acpi_irq_handler) { | |
232 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
233 | acpi_irq_handler); | |
234 | } | |
235 | ||
236 | destroy_workqueue(kacpid_wq); | |
88db5e14 | 237 | destroy_workqueue(kacpi_notify_wq); |
c02256be | 238 | destroy_workqueue(kacpi_hotplug_wq); |
1da177e4 LT |
239 | |
240 | return AE_OK; | |
241 | } | |
242 | ||
4be44fcd | 243 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
244 | { |
245 | va_list args; | |
246 | va_start(args, fmt); | |
247 | acpi_os_vprintf(fmt, args); | |
248 | va_end(args); | |
249 | } | |
4be44fcd | 250 | |
4be44fcd | 251 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
252 | { |
253 | static char buffer[512]; | |
4be44fcd | 254 | |
1da177e4 LT |
255 | vsprintf(buffer, fmt, args); |
256 | ||
257 | #ifdef ENABLE_DEBUGGER | |
258 | if (acpi_in_debugger) { | |
259 | kdb_printf("%s", buffer); | |
260 | } else { | |
4d939155 | 261 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
262 | } |
263 | #else | |
4d939155 | 264 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
265 | #endif |
266 | } | |
267 | ||
ad71860a | 268 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 LT |
269 | { |
270 | if (efi_enabled) { | |
b2c99e3c | 271 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 272 | return efi.acpi20; |
b2c99e3c | 273 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 274 | return efi.acpi; |
1da177e4 | 275 | else { |
4be44fcd LB |
276 | printk(KERN_ERR PREFIX |
277 | "System description tables not found\n"); | |
ad71860a | 278 | return 0; |
1da177e4 | 279 | } |
239665a3 LB |
280 | } else { |
281 | acpi_physical_address pa = 0; | |
282 | ||
283 | acpi_find_root_pointer(&pa); | |
284 | return pa; | |
285 | } | |
1da177e4 LT |
286 | } |
287 | ||
2fdf0741 JB |
288 | void __iomem *__init_refok |
289 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 290 | { |
9f4fd61f BH |
291 | if (phys > ULONG_MAX) { |
292 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 293 | return NULL; |
1da177e4 | 294 | } |
ad71860a AS |
295 | if (acpi_gbl_permanent_mmap) |
296 | /* | |
297 | * ioremap checks to ensure this is in reserved space | |
298 | */ | |
299 | return ioremap((unsigned long)phys, size); | |
300 | else | |
301 | return __acpi_map_table((unsigned long)phys, size); | |
1da177e4 | 302 | } |
55a82ab3 | 303 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 304 | |
0d3a9cf5 | 305 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 306 | { |
7d97277b | 307 | if (acpi_gbl_permanent_mmap) |
ad71860a | 308 | iounmap(virt); |
7d97277b YL |
309 | else |
310 | __acpi_unmap_table(virt, size); | |
1da177e4 | 311 | } |
55a82ab3 | 312 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 313 | |
0d3a9cf5 | 314 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
315 | { |
316 | if (!acpi_gbl_permanent_mmap) | |
317 | __acpi_unmap_table(virt, size); | |
318 | } | |
319 | ||
1da177e4 LT |
320 | #ifdef ACPI_FUTURE_USAGE |
321 | acpi_status | |
4be44fcd | 322 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 323 | { |
4be44fcd | 324 | if (!phys || !virt) |
1da177e4 LT |
325 | return AE_BAD_PARAMETER; |
326 | ||
327 | *phys = virt_to_phys(virt); | |
328 | ||
329 | return AE_OK; | |
330 | } | |
331 | #endif | |
332 | ||
333 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
334 | ||
335 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
336 | ||
337 | acpi_status | |
4be44fcd LB |
338 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
339 | acpi_string * new_val) | |
1da177e4 LT |
340 | { |
341 | if (!init_val || !new_val) | |
342 | return AE_BAD_PARAMETER; | |
343 | ||
344 | *new_val = NULL; | |
4be44fcd | 345 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 346 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 347 | acpi_os_name); |
1da177e4 LT |
348 | *new_val = acpi_os_name; |
349 | } | |
350 | ||
351 | return AE_OK; | |
352 | } | |
353 | ||
354 | acpi_status | |
4be44fcd LB |
355 | acpi_os_table_override(struct acpi_table_header * existing_table, |
356 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
357 | { |
358 | if (!existing_table || !new_table) | |
359 | return AE_BAD_PARAMETER; | |
360 | ||
71fc47a9 MG |
361 | *new_table = NULL; |
362 | ||
1da177e4 LT |
363 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
364 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 365 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 366 | #endif |
6ed31e92 ÉP |
367 | if (*new_table != NULL) { |
368 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
369 | "this is unsafe: tainting kernel\n", | |
370 | existing_table->signature, | |
371 | existing_table->oem_table_id); | |
372 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
373 | } | |
1da177e4 LT |
374 | return AE_OK; |
375 | } | |
376 | ||
7d12e780 | 377 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 378 | { |
5229e87d LB |
379 | u32 handled; |
380 | ||
381 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
382 | ||
383 | if (handled) { | |
384 | acpi_irq_handled++; | |
385 | return IRQ_HANDLED; | |
88bea188 LB |
386 | } else { |
387 | acpi_irq_not_handled++; | |
5229e87d | 388 | return IRQ_NONE; |
88bea188 | 389 | } |
1da177e4 LT |
390 | } |
391 | ||
392 | acpi_status | |
4be44fcd LB |
393 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
394 | void *context) | |
1da177e4 LT |
395 | { |
396 | unsigned int irq; | |
397 | ||
5229e87d LB |
398 | acpi_irq_stats_init(); |
399 | ||
1da177e4 LT |
400 | /* |
401 | * Ignore the GSI from the core, and use the value in our copy of the | |
402 | * FADT. It may not be the same if an interrupt source override exists | |
403 | * for the SCI. | |
404 | */ | |
cee324b1 | 405 | gsi = acpi_gbl_FADT.sci_interrupt; |
1da177e4 LT |
406 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
407 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
408 | gsi); | |
409 | return AE_OK; | |
410 | } | |
411 | ||
412 | acpi_irq_handler = handler; | |
413 | acpi_irq_context = context; | |
dace1453 | 414 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
415 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
416 | return AE_NOT_ACQUIRED; | |
417 | } | |
418 | acpi_irq_irq = irq; | |
419 | ||
420 | return AE_OK; | |
421 | } | |
422 | ||
4be44fcd | 423 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
424 | { |
425 | if (irq) { | |
426 | free_irq(irq, acpi_irq); | |
427 | acpi_irq_handler = NULL; | |
428 | acpi_irq_irq = 0; | |
429 | } | |
430 | ||
431 | return AE_OK; | |
432 | } | |
433 | ||
434 | /* | |
435 | * Running in interpreter thread context, safe to sleep | |
436 | */ | |
437 | ||
439913ff | 438 | void acpi_os_sleep(u64 ms) |
1da177e4 | 439 | { |
01a527ec | 440 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 441 | } |
4be44fcd | 442 | |
4be44fcd | 443 | void acpi_os_stall(u32 us) |
1da177e4 LT |
444 | { |
445 | while (us) { | |
446 | u32 delay = 1000; | |
447 | ||
448 | if (delay > us) | |
449 | delay = us; | |
450 | udelay(delay); | |
451 | touch_nmi_watchdog(); | |
452 | us -= delay; | |
453 | } | |
454 | } | |
4be44fcd | 455 | |
1da177e4 LT |
456 | /* |
457 | * Support ACPI 3.0 AML Timer operand | |
458 | * Returns 64-bit free-running, monotonically increasing timer | |
459 | * with 100ns granularity | |
460 | */ | |
4be44fcd | 461 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
462 | { |
463 | static u64 t; | |
464 | ||
465 | #ifdef CONFIG_HPET | |
466 | /* TBD: use HPET if available */ | |
467 | #endif | |
468 | ||
469 | #ifdef CONFIG_X86_PM_TIMER | |
470 | /* TBD: default to PM timer if HPET was not available */ | |
471 | #endif | |
472 | if (!t) | |
473 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
474 | ||
475 | return ++t; | |
476 | } | |
477 | ||
4be44fcd | 478 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
479 | { |
480 | u32 dummy; | |
481 | ||
482 | if (!value) | |
483 | value = &dummy; | |
484 | ||
49fbabf5 ZY |
485 | *value = 0; |
486 | if (width <= 8) { | |
4be44fcd | 487 | *(u8 *) value = inb(port); |
49fbabf5 | 488 | } else if (width <= 16) { |
4be44fcd | 489 | *(u16 *) value = inw(port); |
49fbabf5 | 490 | } else if (width <= 32) { |
4be44fcd | 491 | *(u32 *) value = inl(port); |
49fbabf5 | 492 | } else { |
1da177e4 LT |
493 | BUG(); |
494 | } | |
495 | ||
496 | return AE_OK; | |
497 | } | |
4be44fcd | 498 | |
1da177e4 LT |
499 | EXPORT_SYMBOL(acpi_os_read_port); |
500 | ||
4be44fcd | 501 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 502 | { |
49fbabf5 | 503 | if (width <= 8) { |
1da177e4 | 504 | outb(value, port); |
49fbabf5 | 505 | } else if (width <= 16) { |
1da177e4 | 506 | outw(value, port); |
49fbabf5 | 507 | } else if (width <= 32) { |
1da177e4 | 508 | outl(value, port); |
49fbabf5 | 509 | } else { |
1da177e4 LT |
510 | BUG(); |
511 | } | |
512 | ||
513 | return AE_OK; | |
514 | } | |
4be44fcd | 515 | |
1da177e4 LT |
516 | EXPORT_SYMBOL(acpi_os_write_port); |
517 | ||
518 | acpi_status | |
4be44fcd | 519 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 520 | { |
4be44fcd LB |
521 | u32 dummy; |
522 | void __iomem *virt_addr; | |
1da177e4 | 523 | |
9f4fd61f | 524 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
525 | if (!value) |
526 | value = &dummy; | |
527 | ||
528 | switch (width) { | |
529 | case 8: | |
4be44fcd | 530 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
531 | break; |
532 | case 16: | |
4be44fcd | 533 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
534 | break; |
535 | case 32: | |
4be44fcd | 536 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
537 | break; |
538 | default: | |
539 | BUG(); | |
540 | } | |
541 | ||
9f4fd61f | 542 | iounmap(virt_addr); |
1da177e4 LT |
543 | |
544 | return AE_OK; | |
545 | } | |
546 | ||
547 | acpi_status | |
4be44fcd | 548 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 549 | { |
4be44fcd | 550 | void __iomem *virt_addr; |
1da177e4 | 551 | |
9f4fd61f | 552 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
553 | |
554 | switch (width) { | |
555 | case 8: | |
556 | writeb(value, virt_addr); | |
557 | break; | |
558 | case 16: | |
559 | writew(value, virt_addr); | |
560 | break; | |
561 | case 32: | |
562 | writel(value, virt_addr); | |
563 | break; | |
564 | default: | |
565 | BUG(); | |
566 | } | |
567 | ||
9f4fd61f | 568 | iounmap(virt_addr); |
1da177e4 LT |
569 | |
570 | return AE_OK; | |
571 | } | |
572 | ||
1da177e4 | 573 | acpi_status |
4be44fcd | 574 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
10270d48 | 575 | u32 *value, u32 width) |
1da177e4 LT |
576 | { |
577 | int result, size; | |
578 | ||
579 | if (!value) | |
580 | return AE_BAD_PARAMETER; | |
581 | ||
582 | switch (width) { | |
583 | case 8: | |
584 | size = 1; | |
585 | break; | |
586 | case 16: | |
587 | size = 2; | |
588 | break; | |
589 | case 32: | |
590 | size = 4; | |
591 | break; | |
592 | default: | |
593 | return AE_ERROR; | |
594 | } | |
595 | ||
b6ce068a MW |
596 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
597 | PCI_DEVFN(pci_id->device, pci_id->function), | |
598 | reg, size, value); | |
1da177e4 LT |
599 | |
600 | return (result ? AE_ERROR : AE_OK); | |
601 | } | |
4be44fcd | 602 | |
1da177e4 | 603 | acpi_status |
4be44fcd | 604 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 605 | u64 value, u32 width) |
1da177e4 LT |
606 | { |
607 | int result, size; | |
608 | ||
609 | switch (width) { | |
610 | case 8: | |
611 | size = 1; | |
612 | break; | |
613 | case 16: | |
614 | size = 2; | |
615 | break; | |
616 | case 32: | |
617 | size = 4; | |
618 | break; | |
619 | default: | |
620 | return AE_ERROR; | |
621 | } | |
622 | ||
b6ce068a MW |
623 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
624 | PCI_DEVFN(pci_id->device, pci_id->function), | |
625 | reg, size, value); | |
1da177e4 LT |
626 | |
627 | return (result ? AE_ERROR : AE_OK); | |
628 | } | |
629 | ||
630 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
631 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
632 | acpi_handle chandle, /* current node */ | |
633 | struct acpi_pci_id **id, | |
634 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 635 | { |
4be44fcd LB |
636 | acpi_handle handle; |
637 | struct acpi_pci_id *pci_id = *id; | |
638 | acpi_status status; | |
27663c58 | 639 | unsigned long long temp; |
4be44fcd | 640 | acpi_object_type type; |
1da177e4 LT |
641 | |
642 | acpi_get_parent(chandle, &handle); | |
643 | if (handle != rhandle) { | |
4be44fcd LB |
644 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
645 | bus_number); | |
1da177e4 LT |
646 | |
647 | status = acpi_get_type(handle, &type); | |
4be44fcd | 648 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
649 | return; |
650 | ||
27663c58 | 651 | status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, |
4be44fcd | 652 | &temp); |
1da177e4 | 653 | if (ACPI_SUCCESS(status)) { |
10270d48 | 654 | u32 val; |
4be44fcd LB |
655 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
656 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
657 | |
658 | if (*is_bridge) | |
659 | pci_id->bus = *bus_number; | |
660 | ||
661 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd | 662 | status = |
10270d48 | 663 | acpi_os_read_pci_configuration(pci_id, 0x0e, &val, |
4be44fcd LB |
664 | 8); |
665 | if (ACPI_SUCCESS(status) | |
10270d48 | 666 | && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) { |
4be44fcd LB |
667 | status = |
668 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
10270d48 | 669 | &val, 8); |
1da177e4 LT |
670 | if (!ACPI_SUCCESS(status)) { |
671 | /* Certainly broken... FIX ME */ | |
672 | return; | |
673 | } | |
674 | *is_bridge = 1; | |
10270d48 | 675 | pci_id->bus = val; |
4be44fcd LB |
676 | status = |
677 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
10270d48 | 678 | &val, 8); |
1da177e4 | 679 | if (ACPI_SUCCESS(status)) { |
10270d48 | 680 | *bus_number = val; |
1da177e4 LT |
681 | } |
682 | } else | |
683 | *is_bridge = 0; | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
4be44fcd LB |
688 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
689 | acpi_handle chandle, /* current node */ | |
690 | struct acpi_pci_id **id) | |
1da177e4 LT |
691 | { |
692 | int is_bridge = 1; | |
693 | u8 bus_number = (*id)->bus; | |
694 | ||
695 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
696 | } | |
697 | ||
65f27f38 | 698 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
699 | { |
700 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 701 | |
9ac61856 BH |
702 | if (dpc->wait) |
703 | acpi_os_wait_events_complete(NULL); | |
19cd847a ZR |
704 | |
705 | dpc->function(dpc->context); | |
706 | kfree(dpc); | |
19cd847a ZR |
707 | } |
708 | ||
b8d35192 AS |
709 | /******************************************************************************* |
710 | * | |
711 | * FUNCTION: acpi_os_execute | |
712 | * | |
713 | * PARAMETERS: Type - Type of the callback | |
714 | * Function - Function to be executed | |
715 | * Context - Function parameters | |
716 | * | |
717 | * RETURN: Status | |
718 | * | |
719 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
720 | * immediately executes function on a separate thread. | |
721 | * | |
722 | ******************************************************************************/ | |
723 | ||
19cd847a ZR |
724 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
725 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 726 | { |
4be44fcd LB |
727 | acpi_status status = AE_OK; |
728 | struct acpi_os_dpc *dpc; | |
17bc54ee | 729 | struct workqueue_struct *queue; |
19cd847a | 730 | int ret; |
72945b2b LB |
731 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
732 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
733 | function, context)); | |
1da177e4 | 734 | |
1da177e4 LT |
735 | /* |
736 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 737 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
738 | * way that allows us to also free its memory inside the callee. |
739 | * Because we may want to schedule several tasks with different | |
740 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 741 | * having a static work_struct. |
1da177e4 | 742 | */ |
72945b2b | 743 | |
65f27f38 | 744 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 745 | if (!dpc) |
889c78be | 746 | return AE_NO_MEMORY; |
b976fe19 | 747 | |
1da177e4 LT |
748 | dpc->function = function; |
749 | dpc->context = context; | |
b976fe19 | 750 | |
c02256be ZR |
751 | /* |
752 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
753 | * because the hotplug code may call driver .remove() functions, | |
754 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
755 | * to flush these workqueues. | |
756 | */ | |
757 | queue = hp ? kacpi_hotplug_wq : | |
758 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
9ac61856 | 759 | dpc->wait = hp ? 1 : 0; |
bc73675b ZR |
760 | |
761 | if (queue == kacpi_hotplug_wq) | |
762 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
763 | else if (queue == kacpi_notify_wq) | |
764 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
765 | else | |
766 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
767 | ||
c02256be | 768 | ret = queue_work(queue, &dpc->work); |
19cd847a ZR |
769 | |
770 | if (!ret) { | |
55ac9a01 LM |
771 | printk(KERN_ERR PREFIX |
772 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
773 | status = AE_ERROR; |
774 | kfree(dpc); | |
1da177e4 | 775 | } |
889c78be | 776 | return status; |
1da177e4 | 777 | } |
4be44fcd | 778 | |
19cd847a ZR |
779 | acpi_status acpi_os_execute(acpi_execute_type type, |
780 | acpi_osd_exec_callback function, void *context) | |
781 | { | |
782 | return __acpi_os_execute(type, function, context, 0); | |
783 | } | |
b8d35192 | 784 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 785 | |
19cd847a ZR |
786 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
787 | void *context) | |
788 | { | |
789 | return __acpi_os_execute(0, function, context, 1); | |
790 | } | |
791 | ||
4be44fcd | 792 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
793 | { |
794 | flush_workqueue(kacpid_wq); | |
2f67a069 | 795 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 796 | } |
4be44fcd | 797 | |
1da177e4 LT |
798 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
799 | ||
800 | /* | |
801 | * Allocate the memory for a spinlock and initialize it. | |
802 | */ | |
967440e3 | 803 | acpi_status acpi_os_create_lock(acpi_spinlock * handle) |
1da177e4 | 804 | { |
967440e3 | 805 | spin_lock_init(*handle); |
1da177e4 | 806 | |
d550d98d | 807 | return AE_OK; |
1da177e4 LT |
808 | } |
809 | ||
1da177e4 LT |
810 | /* |
811 | * Deallocate the memory for a spinlock. | |
812 | */ | |
967440e3 | 813 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 814 | { |
d550d98d | 815 | return; |
1da177e4 LT |
816 | } |
817 | ||
1da177e4 | 818 | acpi_status |
4be44fcd | 819 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 820 | { |
4be44fcd | 821 | struct semaphore *sem = NULL; |
1da177e4 | 822 | |
1da177e4 LT |
823 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
824 | if (!sem) | |
d550d98d | 825 | return AE_NO_MEMORY; |
1da177e4 LT |
826 | memset(sem, 0, sizeof(struct semaphore)); |
827 | ||
828 | sema_init(sem, initial_units); | |
829 | ||
4be44fcd | 830 | *handle = (acpi_handle *) sem; |
1da177e4 | 831 | |
4be44fcd LB |
832 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
833 | *handle, initial_units)); | |
1da177e4 | 834 | |
d550d98d | 835 | return AE_OK; |
1da177e4 | 836 | } |
1da177e4 | 837 | |
1da177e4 LT |
838 | /* |
839 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
840 | * 'delete_semaphore()' function -- may result in an invalid | |
841 | * pointer dereference for non-synchronized consumers. Should | |
842 | * we at least check for blocked threads and signal/cancel them? | |
843 | */ | |
844 | ||
4be44fcd | 845 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 846 | { |
4be44fcd | 847 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 848 | |
1da177e4 | 849 | if (!sem) |
d550d98d | 850 | return AE_BAD_PARAMETER; |
1da177e4 | 851 | |
4be44fcd | 852 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 853 | |
f1241c87 | 854 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 855 | kfree(sem); |
4be44fcd | 856 | sem = NULL; |
1da177e4 | 857 | |
d550d98d | 858 | return AE_OK; |
1da177e4 | 859 | } |
1da177e4 | 860 | |
1da177e4 | 861 | /* |
1da177e4 LT |
862 | * TODO: Support for units > 1? |
863 | */ | |
4be44fcd | 864 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 865 | { |
4be44fcd LB |
866 | acpi_status status = AE_OK; |
867 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 868 | long jiffies; |
4be44fcd | 869 | int ret = 0; |
1da177e4 | 870 | |
1da177e4 | 871 | if (!sem || (units < 1)) |
d550d98d | 872 | return AE_BAD_PARAMETER; |
1da177e4 LT |
873 | |
874 | if (units > 1) | |
d550d98d | 875 | return AE_SUPPORT; |
1da177e4 | 876 | |
4be44fcd LB |
877 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
878 | handle, units, timeout)); | |
1da177e4 | 879 | |
f1241c87 MW |
880 | if (timeout == ACPI_WAIT_FOREVER) |
881 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
882 | else | |
883 | jiffies = msecs_to_jiffies(timeout); | |
884 | ||
885 | ret = down_timeout(sem, jiffies); | |
886 | if (ret) | |
887 | status = AE_TIME; | |
1da177e4 LT |
888 | |
889 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 890 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 891 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
892 | handle, units, timeout, |
893 | acpi_format_exception(status))); | |
894 | } else { | |
895 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 896 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 897 | units, timeout)); |
1da177e4 LT |
898 | } |
899 | ||
d550d98d | 900 | return status; |
1da177e4 | 901 | } |
1da177e4 | 902 | |
1da177e4 LT |
903 | /* |
904 | * TODO: Support for units > 1? | |
905 | */ | |
4be44fcd | 906 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 907 | { |
4be44fcd | 908 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 909 | |
1da177e4 | 910 | if (!sem || (units < 1)) |
d550d98d | 911 | return AE_BAD_PARAMETER; |
1da177e4 LT |
912 | |
913 | if (units > 1) | |
d550d98d | 914 | return AE_SUPPORT; |
1da177e4 | 915 | |
4be44fcd LB |
916 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
917 | units)); | |
1da177e4 LT |
918 | |
919 | up(sem); | |
920 | ||
d550d98d | 921 | return AE_OK; |
1da177e4 | 922 | } |
4be44fcd | 923 | |
1da177e4 | 924 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 925 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
926 | { |
927 | ||
928 | #ifdef ENABLE_DEBUGGER | |
929 | if (acpi_in_debugger) { | |
930 | u32 chars; | |
931 | ||
932 | kdb_read(buffer, sizeof(line_buf)); | |
933 | ||
934 | /* remove the CR kdb includes */ | |
935 | chars = strlen(buffer) - 1; | |
936 | buffer[chars] = '\0'; | |
937 | } | |
938 | #endif | |
939 | ||
940 | return 0; | |
941 | } | |
4be44fcd | 942 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 943 | |
4be44fcd | 944 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 945 | { |
4be44fcd | 946 | switch (function) { |
1da177e4 LT |
947 | case ACPI_SIGNAL_FATAL: |
948 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
949 | break; | |
950 | case ACPI_SIGNAL_BREAKPOINT: | |
951 | /* | |
952 | * AML Breakpoint | |
953 | * ACPI spec. says to treat it as a NOP unless | |
954 | * you are debugging. So if/when we integrate | |
955 | * AML debugger into the kernel debugger its | |
956 | * hook will go here. But until then it is | |
957 | * not useful to print anything on breakpoints. | |
958 | */ | |
959 | break; | |
960 | default: | |
961 | break; | |
962 | } | |
963 | ||
964 | return AE_OK; | |
965 | } | |
4be44fcd | 966 | |
4be44fcd | 967 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
968 | { |
969 | char *p = acpi_os_name; | |
4be44fcd | 970 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
971 | |
972 | if (!str || !*str) | |
973 | return 0; | |
974 | ||
975 | for (; count-- && str && *str; str++) { | |
976 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
977 | *p++ = *str; | |
978 | else if (*str == '\'' || *str == '"') | |
979 | continue; | |
980 | else | |
981 | break; | |
982 | } | |
983 | *p = 0; | |
984 | ||
985 | return 1; | |
4be44fcd | 986 | |
1da177e4 LT |
987 | } |
988 | ||
989 | __setup("acpi_os_name=", acpi_os_name_setup); | |
990 | ||
d4b7dc49 LB |
991 | static void __init set_osi_linux(unsigned int enable) |
992 | { | |
993 | if (osi_linux.enable != enable) { | |
994 | osi_linux.enable = enable; | |
995 | printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", | |
996 | enable ? "Add": "Delet"); | |
997 | } | |
998 | return; | |
999 | } | |
1000 | ||
1001 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1002 | { | |
1003 | osi_linux.cmdline = 1; /* cmdline set the default */ | |
1004 | set_osi_linux(enable); | |
1005 | ||
1006 | return; | |
1007 | } | |
1008 | ||
1009 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1010 | { | |
1011 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ | |
1012 | ||
1013 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); | |
1014 | ||
1015 | if (enable == -1) | |
1016 | return; | |
1017 | ||
1018 | osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ | |
f507654d | 1019 | |
d4b7dc49 | 1020 | set_osi_linux(enable); |
f507654d | 1021 | |
f507654d LB |
1022 | return; |
1023 | } | |
1024 | ||
1da177e4 | 1025 | /* |
ae00d812 LB |
1026 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1027 | * | |
1da177e4 | 1028 | * empty string disables _OSI |
ae00d812 LB |
1029 | * string starting with '!' disables that string |
1030 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1031 | */ |
46c1fbdb | 1032 | int __init acpi_osi_setup(char *str) |
1da177e4 LT |
1033 | { |
1034 | if (str == NULL || *str == '\0') { | |
1035 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1036 | acpi_gbl_create_osi_method = FALSE; | |
aa2e09da | 1037 | } else if (!strcmp("!Linux", str)) { |
d4b7dc49 | 1038 | acpi_cmdline_osi_linux(0); /* !enable */ |
ae00d812 LB |
1039 | } else if (*str == '!') { |
1040 | if (acpi_osi_invalidate(++str) == AE_OK) | |
1041 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
f507654d | 1042 | } else if (!strcmp("Linux", str)) { |
d4b7dc49 | 1043 | acpi_cmdline_osi_linux(1); /* enable */ |
ae00d812 LB |
1044 | } else if (*osi_additional_string == '\0') { |
1045 | strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); | |
1046 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1da177e4 LT |
1047 | } |
1048 | ||
1049 | return 1; | |
1050 | } | |
1051 | ||
1052 | __setup("acpi_osi=", acpi_osi_setup); | |
1053 | ||
1054 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1055 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1056 | { |
1057 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1058 | ||
1059 | acpi_gbl_all_methods_serialized = TRUE; | |
1060 | ||
1061 | return 1; | |
1062 | } | |
1063 | ||
1064 | __setup("acpi_serialize", acpi_serialize_setup); | |
1065 | ||
df92e695 TR |
1066 | /* Check of resource interference between native drivers and ACPI |
1067 | * OperationRegions (SystemIO and System Memory only). | |
1068 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1069 | * in arbitrary AML code and can interfere with legacy drivers. | |
1070 | * acpi_enforce_resources= can be set to: | |
1071 | * | |
7e90560c | 1072 | * - strict (default) (2) |
df92e695 | 1073 | * -> further driver trying to access the resources will not load |
7e90560c | 1074 | * - lax (1) |
df92e695 TR |
1075 | * -> further driver trying to access the resources will load, but you |
1076 | * get a system message that something might go wrong... | |
1077 | * | |
1078 | * - no (0) | |
1079 | * -> ACPI Operation Region resources will not be registered | |
1080 | * | |
1081 | */ | |
1082 | #define ENFORCE_RESOURCES_STRICT 2 | |
1083 | #define ENFORCE_RESOURCES_LAX 1 | |
1084 | #define ENFORCE_RESOURCES_NO 0 | |
1085 | ||
7e90560c | 1086 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1087 | |
1088 | static int __init acpi_enforce_resources_setup(char *str) | |
1089 | { | |
1090 | if (str == NULL || *str == '\0') | |
1091 | return 0; | |
1092 | ||
1093 | if (!strcmp("strict", str)) | |
1094 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1095 | else if (!strcmp("lax", str)) | |
1096 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1097 | else if (!strcmp("no", str)) | |
1098 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1099 | ||
1100 | return 1; | |
1101 | } | |
1102 | ||
1103 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1104 | ||
1105 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1106 | * drivers */ | |
876fba43 | 1107 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 TR |
1108 | { |
1109 | struct acpi_res_list *res_list_elem; | |
1110 | int ioport; | |
1111 | int clash = 0; | |
1112 | ||
1113 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1114 | return 0; | |
1115 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1116 | return 0; | |
1117 | ||
1118 | ioport = res->flags & IORESOURCE_IO; | |
1119 | ||
1120 | spin_lock(&acpi_res_lock); | |
1121 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1122 | resource_list) { | |
1123 | if (ioport && (res_list_elem->resource_type | |
1124 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1125 | continue; | |
1126 | if (!ioport && (res_list_elem->resource_type | |
1127 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1128 | continue; | |
1129 | ||
1130 | if (res->end < res_list_elem->start | |
1131 | || res_list_elem->end < res->start) | |
1132 | continue; | |
1133 | clash = 1; | |
1134 | break; | |
1135 | } | |
1136 | spin_unlock(&acpi_res_lock); | |
1137 | ||
1138 | if (clash) { | |
1139 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
1638bca8 CD |
1140 | printk(KERN_WARNING "ACPI: resource %s %pR" |
1141 | " conflicts with ACPI region %s %pR\n", | |
1142 | res->name, res, res_list_elem->name, | |
1143 | res_list_elem); | |
14f03343 JD |
1144 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1145 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1146 | " cause random problems and system" | |
1147 | " instability\n"); | |
1148 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1149 | " for this device, you should use it instead of" | |
1150 | " the native driver\n"); | |
df92e695 TR |
1151 | } |
1152 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1153 | return -EBUSY; | |
1154 | } | |
1155 | return 0; | |
1156 | } | |
443dea72 | 1157 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1158 | |
1159 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1160 | const char *name) | |
1161 | { | |
1162 | struct resource res = { | |
1163 | .start = start, | |
1164 | .end = start + n - 1, | |
1165 | .name = name, | |
1166 | .flags = IORESOURCE_IO, | |
1167 | }; | |
1168 | ||
1169 | return acpi_check_resource_conflict(&res); | |
1170 | } | |
1171 | EXPORT_SYMBOL(acpi_check_region); | |
1172 | ||
1173 | int acpi_check_mem_region(resource_size_t start, resource_size_t n, | |
1174 | const char *name) | |
1175 | { | |
1176 | struct resource res = { | |
1177 | .start = start, | |
1178 | .end = start + n - 1, | |
1179 | .name = name, | |
1180 | .flags = IORESOURCE_MEM, | |
1181 | }; | |
1182 | ||
1183 | return acpi_check_resource_conflict(&res); | |
1184 | ||
1185 | } | |
1186 | EXPORT_SYMBOL(acpi_check_mem_region); | |
1187 | ||
70dd6bea JD |
1188 | /* |
1189 | * Let drivers know whether the resource checks are effective | |
1190 | */ | |
1191 | int acpi_resources_are_enforced(void) | |
1192 | { | |
1193 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1194 | } | |
1195 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1196 | ||
73459f73 RM |
1197 | /* |
1198 | * Acquire a spinlock. | |
1199 | * | |
1200 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1201 | */ |
1202 | ||
967440e3 | 1203 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1204 | { |
b8e4d893 | 1205 | acpi_cpu_flags flags; |
967440e3 | 1206 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1207 | return flags; |
1208 | } | |
1209 | ||
1210 | /* | |
1211 | * Release a spinlock. See above. | |
1212 | */ | |
1213 | ||
967440e3 | 1214 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1215 | { |
967440e3 | 1216 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1217 | } |
1218 | ||
73459f73 RM |
1219 | #ifndef ACPI_USE_LOCAL_CACHE |
1220 | ||
1221 | /******************************************************************************* | |
1222 | * | |
1223 | * FUNCTION: acpi_os_create_cache | |
1224 | * | |
b229cf92 BM |
1225 | * PARAMETERS: name - Ascii name for the cache |
1226 | * size - Size of each cached object | |
1227 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1228 | * cache - Where the new cache object is returned | |
73459f73 | 1229 | * |
b229cf92 | 1230 | * RETURN: status |
73459f73 RM |
1231 | * |
1232 | * DESCRIPTION: Create a cache object | |
1233 | * | |
1234 | ******************************************************************************/ | |
1235 | ||
1236 | acpi_status | |
4be44fcd | 1237 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1238 | { |
20c2df83 | 1239 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1240 | if (*cache == NULL) |
b229cf92 BM |
1241 | return AE_ERROR; |
1242 | else | |
1243 | return AE_OK; | |
73459f73 RM |
1244 | } |
1245 | ||
1246 | /******************************************************************************* | |
1247 | * | |
1248 | * FUNCTION: acpi_os_purge_cache | |
1249 | * | |
1250 | * PARAMETERS: Cache - Handle to cache object | |
1251 | * | |
1252 | * RETURN: Status | |
1253 | * | |
1254 | * DESCRIPTION: Free all objects within the requested cache. | |
1255 | * | |
1256 | ******************************************************************************/ | |
1257 | ||
4be44fcd | 1258 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1259 | { |
50dd0969 | 1260 | kmem_cache_shrink(cache); |
4be44fcd | 1261 | return (AE_OK); |
73459f73 RM |
1262 | } |
1263 | ||
1264 | /******************************************************************************* | |
1265 | * | |
1266 | * FUNCTION: acpi_os_delete_cache | |
1267 | * | |
1268 | * PARAMETERS: Cache - Handle to cache object | |
1269 | * | |
1270 | * RETURN: Status | |
1271 | * | |
1272 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1273 | * cache object. | |
1274 | * | |
1275 | ******************************************************************************/ | |
1276 | ||
4be44fcd | 1277 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1278 | { |
1a1d92c1 | 1279 | kmem_cache_destroy(cache); |
4be44fcd | 1280 | return (AE_OK); |
73459f73 RM |
1281 | } |
1282 | ||
1283 | /******************************************************************************* | |
1284 | * | |
1285 | * FUNCTION: acpi_os_release_object | |
1286 | * | |
1287 | * PARAMETERS: Cache - Handle to cache object | |
1288 | * Object - The object to be released | |
1289 | * | |
1290 | * RETURN: None | |
1291 | * | |
1292 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1293 | * the object is deleted. | |
1294 | * | |
1295 | ******************************************************************************/ | |
1296 | ||
4be44fcd | 1297 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1298 | { |
4be44fcd LB |
1299 | kmem_cache_free(cache, object); |
1300 | return (AE_OK); | |
73459f73 RM |
1301 | } |
1302 | ||
b229cf92 BM |
1303 | /****************************************************************************** |
1304 | * | |
1305 | * FUNCTION: acpi_os_validate_interface | |
1306 | * | |
1307 | * PARAMETERS: interface - Requested interface to be validated | |
1308 | * | |
1309 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1310 | * | |
1311 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1312 | * host. Strings originate from an AML call to the _OSI method. | |
1313 | * | |
1314 | *****************************************************************************/ | |
1315 | ||
1316 | acpi_status | |
1317 | acpi_os_validate_interface (char *interface) | |
1318 | { | |
ae00d812 LB |
1319 | if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) |
1320 | return AE_OK; | |
f507654d | 1321 | if (!strcmp("Linux", interface)) { |
d4b7dc49 | 1322 | |
f40cd6fd | 1323 | printk(KERN_NOTICE PREFIX |
d4b7dc49 LB |
1324 | "BIOS _OSI(Linux) query %s%s\n", |
1325 | osi_linux.enable ? "honored" : "ignored", | |
1326 | osi_linux.cmdline ? " via cmdline" : | |
1327 | osi_linux.dmi ? " via DMI" : ""); | |
1328 | ||
d4b7dc49 | 1329 | if (osi_linux.enable) |
f507654d LB |
1330 | return AE_OK; |
1331 | } | |
ae00d812 | 1332 | return AE_SUPPORT; |
b229cf92 BM |
1333 | } |
1334 | ||
a5fe1a03 LM |
1335 | static inline int acpi_res_list_add(struct acpi_res_list *res) |
1336 | { | |
1337 | struct acpi_res_list *res_list_elem; | |
1338 | ||
1339 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1340 | resource_list) { | |
1341 | ||
1342 | if (res->resource_type == res_list_elem->resource_type && | |
1343 | res->start == res_list_elem->start && | |
1344 | res->end == res_list_elem->end) { | |
1345 | ||
1346 | /* | |
1347 | * The Region(addr,len) already exist in the list, | |
1348 | * just increase the count | |
1349 | */ | |
1350 | ||
1351 | res_list_elem->count++; | |
1352 | return 0; | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | res->count = 1; | |
1357 | list_add(&res->resource_list, &resource_list_head); | |
1358 | return 1; | |
1359 | } | |
1360 | ||
1361 | static inline void acpi_res_list_del(struct acpi_res_list *res) | |
1362 | { | |
1363 | struct acpi_res_list *res_list_elem; | |
1364 | ||
1365 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1366 | resource_list) { | |
1367 | ||
1368 | if (res->resource_type == res_list_elem->resource_type && | |
1369 | res->start == res_list_elem->start && | |
1370 | res->end == res_list_elem->end) { | |
1371 | ||
1372 | /* | |
1373 | * If the res count is decreased to 0, | |
1374 | * remove and free it | |
1375 | */ | |
1376 | ||
1377 | if (--res_list_elem->count == 0) { | |
1378 | list_del(&res_list_elem->resource_list); | |
1379 | kfree(res_list_elem); | |
1380 | } | |
1381 | return; | |
1382 | } | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | acpi_status | |
1387 | acpi_os_invalidate_address( | |
1388 | u8 space_id, | |
1389 | acpi_physical_address address, | |
1390 | acpi_size length) | |
1391 | { | |
1392 | struct acpi_res_list res; | |
1393 | ||
1394 | switch (space_id) { | |
1395 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1396 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1397 | /* Only interference checks against SystemIO and SystemMemory |
a5fe1a03 LM |
1398 | are needed */ |
1399 | res.start = address; | |
1400 | res.end = address + length - 1; | |
1401 | res.resource_type = space_id; | |
1402 | spin_lock(&acpi_res_lock); | |
1403 | acpi_res_list_del(&res); | |
1404 | spin_unlock(&acpi_res_lock); | |
1405 | break; | |
1406 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1407 | case ACPI_ADR_SPACE_EC: | |
1408 | case ACPI_ADR_SPACE_SMBUS: | |
1409 | case ACPI_ADR_SPACE_CMOS: | |
1410 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1411 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1412 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1413 | break; | |
1414 | } | |
1415 | return AE_OK; | |
1416 | } | |
1417 | ||
b229cf92 BM |
1418 | /****************************************************************************** |
1419 | * | |
1420 | * FUNCTION: acpi_os_validate_address | |
1421 | * | |
1422 | * PARAMETERS: space_id - ACPI space ID | |
1423 | * address - Physical address | |
1424 | * length - Address length | |
1425 | * | |
1426 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1427 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1428 | * | |
1429 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1430 | * the addresses accessed by AML operation regions. | |
1431 | * | |
1432 | *****************************************************************************/ | |
1433 | ||
1434 | acpi_status | |
1435 | acpi_os_validate_address ( | |
1436 | u8 space_id, | |
1437 | acpi_physical_address address, | |
df92e695 TR |
1438 | acpi_size length, |
1439 | char *name) | |
b229cf92 | 1440 | { |
df92e695 | 1441 | struct acpi_res_list *res; |
a5fe1a03 | 1442 | int added; |
df92e695 TR |
1443 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
1444 | return AE_OK; | |
b229cf92 | 1445 | |
df92e695 TR |
1446 | switch (space_id) { |
1447 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1448 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
88393161 | 1449 | /* Only interference checks against SystemIO and SystemMemory |
df92e695 TR |
1450 | are needed */ |
1451 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1452 | if (!res) | |
1453 | return AE_OK; | |
1454 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1455 | strlcpy(res->name, name, 5); | |
1456 | res->start = address; | |
1457 | res->end = address + length - 1; | |
1458 | res->resource_type = space_id; | |
1459 | spin_lock(&acpi_res_lock); | |
a5fe1a03 | 1460 | added = acpi_res_list_add(res); |
df92e695 | 1461 | spin_unlock(&acpi_res_lock); |
a5fe1a03 LM |
1462 | pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " |
1463 | "name: %s\n", added ? "Added" : "Already exist", | |
1464 | (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
df92e695 TR |
1465 | ? "SystemIO" : "System Memory", |
1466 | (unsigned long long)res->start, | |
1467 | (unsigned long long)res->end, | |
1468 | res->name); | |
a5fe1a03 LM |
1469 | if (!added) |
1470 | kfree(res); | |
df92e695 TR |
1471 | break; |
1472 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1473 | case ACPI_ADR_SPACE_EC: | |
1474 | case ACPI_ADR_SPACE_SMBUS: | |
1475 | case ACPI_ADR_SPACE_CMOS: | |
1476 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1477 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1478 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1479 | break; | |
1480 | } | |
1481 | return AE_OK; | |
b229cf92 BM |
1482 | } |
1483 | ||
73459f73 | 1484 | #endif |