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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> | |
7 | * | |
8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | * | |
24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
25 | * | |
26 | */ | |
27 | ||
1da177e4 LT |
28 | #include <linux/module.h> |
29 | #include <linux/kernel.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/pci.h> | |
1da177e4 LT |
33 | #include <linux/interrupt.h> |
34 | #include <linux/kmod.h> | |
35 | #include <linux/delay.h> | |
f507654d | 36 | #include <linux/dmi.h> |
1da177e4 LT |
37 | #include <linux/workqueue.h> |
38 | #include <linux/nmi.h> | |
ad71860a | 39 | #include <linux/acpi.h> |
1da177e4 LT |
40 | #include <acpi/acpi.h> |
41 | #include <asm/io.h> | |
42 | #include <acpi/acpi_bus.h> | |
43 | #include <acpi/processor.h> | |
44 | #include <asm/uaccess.h> | |
45 | ||
46 | #include <linux/efi.h> | |
df92e695 TR |
47 | #include <linux/ioport.h> |
48 | #include <linux/list.h> | |
1da177e4 | 49 | |
1da177e4 | 50 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 51 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 52 | #define PREFIX "ACPI: " |
4be44fcd LB |
53 | struct acpi_os_dpc { |
54 | acpi_osd_exec_callback function; | |
55 | void *context; | |
65f27f38 | 56 | struct work_struct work; |
1da177e4 LT |
57 | }; |
58 | ||
59 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
60 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
61 | #endif | |
62 | ||
63 | #ifdef ENABLE_DEBUGGER | |
64 | #include <linux/kdb.h> | |
65 | ||
66 | /* stuff for debugger support */ | |
67 | int acpi_in_debugger; | |
68 | EXPORT_SYMBOL(acpi_in_debugger); | |
69 | ||
70 | extern char line_buf[80]; | |
4be44fcd | 71 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 LT |
72 | |
73 | static unsigned int acpi_irq_irq; | |
74 | static acpi_osd_handler acpi_irq_handler; | |
75 | static void *acpi_irq_context; | |
76 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 77 | static struct workqueue_struct *kacpi_notify_wq; |
1da177e4 | 78 | |
df92e695 TR |
79 | struct acpi_res_list { |
80 | resource_size_t start; | |
81 | resource_size_t end; | |
82 | acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ | |
83 | char name[5]; /* only can have a length of 4 chars, make use of this | |
84 | one instead of res->name, no need to kalloc then */ | |
85 | struct list_head resource_list; | |
86 | }; | |
87 | ||
88 | static LIST_HEAD(resource_list_head); | |
89 | static DEFINE_SPINLOCK(acpi_res_lock); | |
90 | ||
ae00d812 LB |
91 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
92 | static char osi_additional_string[OSI_STRING_LENGTH_MAX]; | |
93 | ||
9cbc7960 ÉP |
94 | #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD |
95 | static int acpi_no_initrd_override; | |
96 | #endif | |
97 | ||
d4b7dc49 LB |
98 | /* |
99 | * "Ode to _OSI(Linux)" | |
100 | * | |
101 | * osi_linux -- Control response to BIOS _OSI(Linux) query. | |
102 | * | |
103 | * As Linux evolves, the features that it supports change. | |
104 | * So an OSI string such as "Linux" is not specific enough | |
105 | * to be useful across multiple versions of Linux. It | |
106 | * doesn't identify any particular feature, interface, | |
107 | * or even any particular version of Linux... | |
108 | * | |
109 | * Unfortunately, Linux-2.6.22 and earlier responded "yes" | |
110 | * to a BIOS _OSI(Linux) query. When | |
111 | * a reference mobile BIOS started using it, its use | |
112 | * started to spread to many vendor platforms. | |
113 | * As it is not supportable, we need to halt that spread. | |
114 | * | |
115 | * Today, most BIOS references to _OSI(Linux) are noise -- | |
116 | * they have no functional effect and are just dead code | |
117 | * carried over from the reference BIOS. | |
118 | * | |
119 | * The next most common case is that _OSI(Linux) harms Linux, | |
120 | * usually by causing the BIOS to follow paths that are | |
121 | * not tested during Windows validation. | |
122 | * | |
123 | * Finally, there is a short list of platforms | |
124 | * where OSI(Linux) benefits Linux. | |
125 | * | |
126 | * In Linux-2.6.23, OSI(Linux) is first disabled by default. | |
127 | * DMI is used to disable the dmesg warning about OSI(Linux) | |
128 | * on platforms where it is known to have no effect. | |
129 | * But a dmesg warning remains for systems where | |
130 | * we do not know if OSI(Linux) is good or bad for the system. | |
131 | * DMI is also used to enable OSI(Linux) for the machines | |
132 | * that are known to need it. | |
133 | * | |
134 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
135 | * It will be ignored by default, and to get Linux to | |
136 | * not ignore it will require a kernel source update to | |
137 | * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation. | |
138 | */ | |
139 | #define OSI_LINUX_ENABLE 0 | |
140 | ||
1d15d84e | 141 | static struct osi_linux { |
d4b7dc49 LB |
142 | unsigned int enable:1; |
143 | unsigned int dmi:1; | |
144 | unsigned int cmdline:1; | |
145 | unsigned int known:1; | |
146 | } osi_linux = { OSI_LINUX_ENABLE, 0, 0, 0}; | |
f507654d | 147 | |
9a47cdb1 BH |
148 | static void __init acpi_request_region (struct acpi_generic_address *addr, |
149 | unsigned int length, char *desc) | |
150 | { | |
151 | struct resource *res; | |
152 | ||
153 | if (!addr->address || !length) | |
154 | return; | |
155 | ||
eee3c859 | 156 | if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
9a47cdb1 | 157 | res = request_region(addr->address, length, desc); |
eee3c859 | 158 | else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
9a47cdb1 BH |
159 | res = request_mem_region(addr->address, length, desc); |
160 | } | |
161 | ||
162 | static int __init acpi_reserve_resources(void) | |
163 | { | |
eee3c859 | 164 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
165 | "ACPI PM1a_EVT_BLK"); |
166 | ||
eee3c859 | 167 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
168 | "ACPI PM1b_EVT_BLK"); |
169 | ||
eee3c859 | 170 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
171 | "ACPI PM1a_CNT_BLK"); |
172 | ||
eee3c859 | 173 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
174 | "ACPI PM1b_CNT_BLK"); |
175 | ||
eee3c859 LB |
176 | if (acpi_gbl_FADT.pm_timer_length == 4) |
177 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 178 | |
eee3c859 | 179 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
180 | "ACPI PM2_CNT_BLK"); |
181 | ||
182 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
183 | ||
eee3c859 LB |
184 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
185 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
186 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 187 | |
eee3c859 LB |
188 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
189 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
190 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
191 | |
192 | return 0; | |
193 | } | |
194 | device_initcall(acpi_reserve_resources); | |
195 | ||
dd272b57 | 196 | acpi_status __init acpi_os_initialize(void) |
1da177e4 LT |
197 | { |
198 | return AE_OK; | |
199 | } | |
200 | ||
4be44fcd | 201 | acpi_status acpi_os_initialize1(void) |
1da177e4 | 202 | { |
1da177e4 | 203 | kacpid_wq = create_singlethread_workqueue("kacpid"); |
88db5e14 | 204 | kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify"); |
1da177e4 | 205 | BUG_ON(!kacpid_wq); |
88db5e14 | 206 | BUG_ON(!kacpi_notify_wq); |
1da177e4 LT |
207 | return AE_OK; |
208 | } | |
209 | ||
4be44fcd | 210 | acpi_status acpi_os_terminate(void) |
1da177e4 LT |
211 | { |
212 | if (acpi_irq_handler) { | |
213 | acpi_os_remove_interrupt_handler(acpi_irq_irq, | |
214 | acpi_irq_handler); | |
215 | } | |
216 | ||
217 | destroy_workqueue(kacpid_wq); | |
88db5e14 | 218 | destroy_workqueue(kacpi_notify_wq); |
1da177e4 LT |
219 | |
220 | return AE_OK; | |
221 | } | |
222 | ||
4be44fcd | 223 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
224 | { |
225 | va_list args; | |
226 | va_start(args, fmt); | |
227 | acpi_os_vprintf(fmt, args); | |
228 | va_end(args); | |
229 | } | |
4be44fcd | 230 | |
4be44fcd | 231 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
232 | { |
233 | static char buffer[512]; | |
4be44fcd | 234 | |
1da177e4 LT |
235 | vsprintf(buffer, fmt, args); |
236 | ||
237 | #ifdef ENABLE_DEBUGGER | |
238 | if (acpi_in_debugger) { | |
239 | kdb_printf("%s", buffer); | |
240 | } else { | |
241 | printk("%s", buffer); | |
242 | } | |
243 | #else | |
244 | printk("%s", buffer); | |
245 | #endif | |
246 | } | |
247 | ||
ad71860a | 248 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 LT |
249 | { |
250 | if (efi_enabled) { | |
b2c99e3c | 251 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 252 | return efi.acpi20; |
b2c99e3c | 253 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 254 | return efi.acpi; |
1da177e4 | 255 | else { |
4be44fcd LB |
256 | printk(KERN_ERR PREFIX |
257 | "System description tables not found\n"); | |
ad71860a | 258 | return 0; |
1da177e4 | 259 | } |
239665a3 LB |
260 | } else { |
261 | acpi_physical_address pa = 0; | |
262 | ||
263 | acpi_find_root_pointer(&pa); | |
264 | return pa; | |
265 | } | |
1da177e4 LT |
266 | } |
267 | ||
2fdf0741 JB |
268 | void __iomem *__init_refok |
269 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 270 | { |
9f4fd61f BH |
271 | if (phys > ULONG_MAX) { |
272 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 273 | return NULL; |
1da177e4 | 274 | } |
ad71860a AS |
275 | if (acpi_gbl_permanent_mmap) |
276 | /* | |
277 | * ioremap checks to ensure this is in reserved space | |
278 | */ | |
279 | return ioremap((unsigned long)phys, size); | |
280 | else | |
281 | return __acpi_map_table((unsigned long)phys, size); | |
1da177e4 | 282 | } |
55a82ab3 | 283 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 284 | |
4be44fcd | 285 | void acpi_os_unmap_memory(void __iomem * virt, acpi_size size) |
1da177e4 | 286 | { |
ad71860a AS |
287 | if (acpi_gbl_permanent_mmap) { |
288 | iounmap(virt); | |
289 | } | |
1da177e4 | 290 | } |
55a82ab3 | 291 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 LT |
292 | |
293 | #ifdef ACPI_FUTURE_USAGE | |
294 | acpi_status | |
4be44fcd | 295 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 296 | { |
4be44fcd | 297 | if (!phys || !virt) |
1da177e4 LT |
298 | return AE_BAD_PARAMETER; |
299 | ||
300 | *phys = virt_to_phys(virt); | |
301 | ||
302 | return AE_OK; | |
303 | } | |
304 | #endif | |
305 | ||
306 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
307 | ||
308 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
309 | ||
310 | acpi_status | |
4be44fcd LB |
311 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
312 | acpi_string * new_val) | |
1da177e4 LT |
313 | { |
314 | if (!init_val || !new_val) | |
315 | return AE_BAD_PARAMETER; | |
316 | ||
317 | *new_val = NULL; | |
4be44fcd | 318 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 319 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 320 | acpi_os_name); |
1da177e4 LT |
321 | *new_val = acpi_os_name; |
322 | } | |
323 | ||
324 | return AE_OK; | |
325 | } | |
326 | ||
71fc47a9 MG |
327 | #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD |
328 | struct acpi_table_header *acpi_find_dsdt_initrd(void) | |
329 | { | |
330 | struct file *firmware_file; | |
331 | mm_segment_t oldfs; | |
332 | unsigned long len, len2; | |
333 | struct acpi_table_header *dsdt_buffer, *ret = NULL; | |
334 | struct kstat stat; | |
335 | char *ramfs_dsdt_name = "/DSDT.aml"; | |
336 | ||
b0b23e0a | 337 | printk(KERN_INFO PREFIX "Checking initramfs for custom DSDT\n"); |
71fc47a9 MG |
338 | |
339 | /* | |
340 | * Never do this at home, only the user-space is allowed to open a file. | |
04d94886 LB |
341 | * The clean way would be to use the firmware loader. |
342 | * But this code must be run before there is any userspace available. | |
343 | * A static/init firmware infrastructure doesn't exist yet... | |
71fc47a9 | 344 | */ |
04d94886 | 345 | if (vfs_stat(ramfs_dsdt_name, &stat) < 0) |
71fc47a9 | 346 | return ret; |
71fc47a9 MG |
347 | |
348 | len = stat.size; | |
349 | /* check especially against empty files */ | |
350 | if (len <= 4) { | |
04d94886 | 351 | printk(KERN_ERR PREFIX "Failed: DSDT only %lu bytes.\n", len); |
71fc47a9 MG |
352 | return ret; |
353 | } | |
354 | ||
355 | firmware_file = filp_open(ramfs_dsdt_name, O_RDONLY, 0); | |
356 | if (IS_ERR(firmware_file)) { | |
04d94886 | 357 | printk(KERN_ERR PREFIX "Failed to open %s.\n", ramfs_dsdt_name); |
71fc47a9 MG |
358 | return ret; |
359 | } | |
360 | ||
04d94886 | 361 | dsdt_buffer = kmalloc(len, GFP_ATOMIC); |
71fc47a9 | 362 | if (!dsdt_buffer) { |
04d94886 | 363 | printk(KERN_ERR PREFIX "Failed to allocate %lu bytes.\n", len); |
71fc47a9 MG |
364 | goto err; |
365 | } | |
366 | ||
367 | oldfs = get_fs(); | |
368 | set_fs(KERNEL_DS); | |
04d94886 LB |
369 | len2 = vfs_read(firmware_file, (char __user *)dsdt_buffer, len, |
370 | &firmware_file->f_pos); | |
71fc47a9 MG |
371 | set_fs(oldfs); |
372 | if (len2 < len) { | |
04d94886 LB |
373 | printk(KERN_ERR PREFIX "Failed to read %lu bytes from %s.\n", |
374 | len, ramfs_dsdt_name); | |
71fc47a9 MG |
375 | ACPI_FREE(dsdt_buffer); |
376 | goto err; | |
377 | } | |
378 | ||
04d94886 LB |
379 | printk(KERN_INFO PREFIX "Found %lu byte DSDT in %s.\n", |
380 | len, ramfs_dsdt_name); | |
71fc47a9 MG |
381 | ret = dsdt_buffer; |
382 | err: | |
383 | filp_close(firmware_file, NULL); | |
384 | return ret; | |
385 | } | |
386 | #endif | |
387 | ||
1da177e4 | 388 | acpi_status |
4be44fcd LB |
389 | acpi_os_table_override(struct acpi_table_header * existing_table, |
390 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
391 | { |
392 | if (!existing_table || !new_table) | |
393 | return AE_BAD_PARAMETER; | |
394 | ||
71fc47a9 MG |
395 | *new_table = NULL; |
396 | ||
1da177e4 LT |
397 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
398 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 399 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 400 | #endif |
71fc47a9 | 401 | #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD |
9cbc7960 ÉP |
402 | if ((strncmp(existing_table->signature, "DSDT", 4) == 0) && |
403 | !acpi_no_initrd_override) { | |
04d94886 LB |
404 | struct acpi_table_header *initrd_table; |
405 | ||
406 | initrd_table = acpi_find_dsdt_initrd(); | |
71fc47a9 MG |
407 | if (initrd_table) |
408 | *new_table = initrd_table; | |
409 | } | |
1da177e4 | 410 | #endif |
6ed31e92 ÉP |
411 | if (*new_table != NULL) { |
412 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
413 | "this is unsafe: tainting kernel\n", | |
414 | existing_table->signature, | |
415 | existing_table->oem_table_id); | |
416 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
417 | } | |
1da177e4 LT |
418 | return AE_OK; |
419 | } | |
420 | ||
9cbc7960 ÉP |
421 | #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD |
422 | int __init acpi_no_initrd_override_setup(char *s) | |
423 | { | |
424 | acpi_no_initrd_override = 1; | |
425 | return 1; | |
426 | } | |
427 | __setup("acpi_no_initrd_override", acpi_no_initrd_override_setup); | |
428 | #endif | |
429 | ||
7d12e780 | 430 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 431 | { |
5229e87d LB |
432 | u32 handled; |
433 | ||
434 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
435 | ||
436 | if (handled) { | |
437 | acpi_irq_handled++; | |
438 | return IRQ_HANDLED; | |
439 | } else | |
440 | return IRQ_NONE; | |
1da177e4 LT |
441 | } |
442 | ||
443 | acpi_status | |
4be44fcd LB |
444 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
445 | void *context) | |
1da177e4 LT |
446 | { |
447 | unsigned int irq; | |
448 | ||
5229e87d LB |
449 | acpi_irq_stats_init(); |
450 | ||
1da177e4 LT |
451 | /* |
452 | * Ignore the GSI from the core, and use the value in our copy of the | |
453 | * FADT. It may not be the same if an interrupt source override exists | |
454 | * for the SCI. | |
455 | */ | |
cee324b1 | 456 | gsi = acpi_gbl_FADT.sci_interrupt; |
1da177e4 LT |
457 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
458 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
459 | gsi); | |
460 | return AE_OK; | |
461 | } | |
462 | ||
463 | acpi_irq_handler = handler; | |
464 | acpi_irq_context = context; | |
dace1453 | 465 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 LT |
466 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
467 | return AE_NOT_ACQUIRED; | |
468 | } | |
469 | acpi_irq_irq = irq; | |
470 | ||
471 | return AE_OK; | |
472 | } | |
473 | ||
4be44fcd | 474 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 LT |
475 | { |
476 | if (irq) { | |
477 | free_irq(irq, acpi_irq); | |
478 | acpi_irq_handler = NULL; | |
479 | acpi_irq_irq = 0; | |
480 | } | |
481 | ||
482 | return AE_OK; | |
483 | } | |
484 | ||
485 | /* | |
486 | * Running in interpreter thread context, safe to sleep | |
487 | */ | |
488 | ||
4be44fcd | 489 | void acpi_os_sleep(acpi_integer ms) |
1da177e4 | 490 | { |
01a527ec | 491 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 492 | } |
4be44fcd | 493 | |
4be44fcd | 494 | void acpi_os_stall(u32 us) |
1da177e4 LT |
495 | { |
496 | while (us) { | |
497 | u32 delay = 1000; | |
498 | ||
499 | if (delay > us) | |
500 | delay = us; | |
501 | udelay(delay); | |
502 | touch_nmi_watchdog(); | |
503 | us -= delay; | |
504 | } | |
505 | } | |
4be44fcd | 506 | |
1da177e4 LT |
507 | /* |
508 | * Support ACPI 3.0 AML Timer operand | |
509 | * Returns 64-bit free-running, monotonically increasing timer | |
510 | * with 100ns granularity | |
511 | */ | |
4be44fcd | 512 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
513 | { |
514 | static u64 t; | |
515 | ||
516 | #ifdef CONFIG_HPET | |
517 | /* TBD: use HPET if available */ | |
518 | #endif | |
519 | ||
520 | #ifdef CONFIG_X86_PM_TIMER | |
521 | /* TBD: default to PM timer if HPET was not available */ | |
522 | #endif | |
523 | if (!t) | |
524 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
525 | ||
526 | return ++t; | |
527 | } | |
528 | ||
4be44fcd | 529 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
530 | { |
531 | u32 dummy; | |
532 | ||
533 | if (!value) | |
534 | value = &dummy; | |
535 | ||
49fbabf5 ZY |
536 | *value = 0; |
537 | if (width <= 8) { | |
4be44fcd | 538 | *(u8 *) value = inb(port); |
49fbabf5 | 539 | } else if (width <= 16) { |
4be44fcd | 540 | *(u16 *) value = inw(port); |
49fbabf5 | 541 | } else if (width <= 32) { |
4be44fcd | 542 | *(u32 *) value = inl(port); |
49fbabf5 | 543 | } else { |
1da177e4 LT |
544 | BUG(); |
545 | } | |
546 | ||
547 | return AE_OK; | |
548 | } | |
4be44fcd | 549 | |
1da177e4 LT |
550 | EXPORT_SYMBOL(acpi_os_read_port); |
551 | ||
4be44fcd | 552 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 553 | { |
49fbabf5 | 554 | if (width <= 8) { |
1da177e4 | 555 | outb(value, port); |
49fbabf5 | 556 | } else if (width <= 16) { |
1da177e4 | 557 | outw(value, port); |
49fbabf5 | 558 | } else if (width <= 32) { |
1da177e4 | 559 | outl(value, port); |
49fbabf5 | 560 | } else { |
1da177e4 LT |
561 | BUG(); |
562 | } | |
563 | ||
564 | return AE_OK; | |
565 | } | |
4be44fcd | 566 | |
1da177e4 LT |
567 | EXPORT_SYMBOL(acpi_os_write_port); |
568 | ||
569 | acpi_status | |
4be44fcd | 570 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 571 | { |
4be44fcd LB |
572 | u32 dummy; |
573 | void __iomem *virt_addr; | |
1da177e4 | 574 | |
9f4fd61f | 575 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
576 | if (!value) |
577 | value = &dummy; | |
578 | ||
579 | switch (width) { | |
580 | case 8: | |
4be44fcd | 581 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
582 | break; |
583 | case 16: | |
4be44fcd | 584 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
585 | break; |
586 | case 32: | |
4be44fcd | 587 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
588 | break; |
589 | default: | |
590 | BUG(); | |
591 | } | |
592 | ||
9f4fd61f | 593 | iounmap(virt_addr); |
1da177e4 LT |
594 | |
595 | return AE_OK; | |
596 | } | |
597 | ||
598 | acpi_status | |
4be44fcd | 599 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 600 | { |
4be44fcd | 601 | void __iomem *virt_addr; |
1da177e4 | 602 | |
9f4fd61f | 603 | virt_addr = ioremap(phys_addr, width); |
1da177e4 LT |
604 | |
605 | switch (width) { | |
606 | case 8: | |
607 | writeb(value, virt_addr); | |
608 | break; | |
609 | case 16: | |
610 | writew(value, virt_addr); | |
611 | break; | |
612 | case 32: | |
613 | writel(value, virt_addr); | |
614 | break; | |
615 | default: | |
616 | BUG(); | |
617 | } | |
618 | ||
9f4fd61f | 619 | iounmap(virt_addr); |
1da177e4 LT |
620 | |
621 | return AE_OK; | |
622 | } | |
623 | ||
1da177e4 | 624 | acpi_status |
4be44fcd LB |
625 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
626 | void *value, u32 width) | |
1da177e4 LT |
627 | { |
628 | int result, size; | |
629 | ||
630 | if (!value) | |
631 | return AE_BAD_PARAMETER; | |
632 | ||
633 | switch (width) { | |
634 | case 8: | |
635 | size = 1; | |
636 | break; | |
637 | case 16: | |
638 | size = 2; | |
639 | break; | |
640 | case 32: | |
641 | size = 4; | |
642 | break; | |
643 | default: | |
644 | return AE_ERROR; | |
645 | } | |
646 | ||
b6ce068a MW |
647 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
648 | PCI_DEVFN(pci_id->device, pci_id->function), | |
649 | reg, size, value); | |
1da177e4 LT |
650 | |
651 | return (result ? AE_ERROR : AE_OK); | |
652 | } | |
4be44fcd | 653 | |
1da177e4 | 654 | acpi_status |
4be44fcd LB |
655 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
656 | acpi_integer value, u32 width) | |
1da177e4 LT |
657 | { |
658 | int result, size; | |
659 | ||
660 | switch (width) { | |
661 | case 8: | |
662 | size = 1; | |
663 | break; | |
664 | case 16: | |
665 | size = 2; | |
666 | break; | |
667 | case 32: | |
668 | size = 4; | |
669 | break; | |
670 | default: | |
671 | return AE_ERROR; | |
672 | } | |
673 | ||
b6ce068a MW |
674 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
675 | PCI_DEVFN(pci_id->device, pci_id->function), | |
676 | reg, size, value); | |
1da177e4 LT |
677 | |
678 | return (result ? AE_ERROR : AE_OK); | |
679 | } | |
680 | ||
681 | /* TODO: Change code to take advantage of driver model more */ | |
4be44fcd LB |
682 | static void acpi_os_derive_pci_id_2(acpi_handle rhandle, /* upper bound */ |
683 | acpi_handle chandle, /* current node */ | |
684 | struct acpi_pci_id **id, | |
685 | int *is_bridge, u8 * bus_number) | |
1da177e4 | 686 | { |
4be44fcd LB |
687 | acpi_handle handle; |
688 | struct acpi_pci_id *pci_id = *id; | |
689 | acpi_status status; | |
690 | unsigned long temp; | |
691 | acpi_object_type type; | |
692 | u8 tu8; | |
1da177e4 LT |
693 | |
694 | acpi_get_parent(chandle, &handle); | |
695 | if (handle != rhandle) { | |
4be44fcd LB |
696 | acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge, |
697 | bus_number); | |
1da177e4 LT |
698 | |
699 | status = acpi_get_type(handle, &type); | |
4be44fcd | 700 | if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE)) |
1da177e4 LT |
701 | return; |
702 | ||
4be44fcd LB |
703 | status = |
704 | acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, | |
705 | &temp); | |
1da177e4 | 706 | if (ACPI_SUCCESS(status)) { |
4be44fcd LB |
707 | pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp)); |
708 | pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp)); | |
1da177e4 LT |
709 | |
710 | if (*is_bridge) | |
711 | pci_id->bus = *bus_number; | |
712 | ||
713 | /* any nicer way to get bus number of bridge ? */ | |
4be44fcd LB |
714 | status = |
715 | acpi_os_read_pci_configuration(pci_id, 0x0e, &tu8, | |
716 | 8); | |
717 | if (ACPI_SUCCESS(status) | |
718 | && ((tu8 & 0x7f) == 1 || (tu8 & 0x7f) == 2)) { | |
719 | status = | |
720 | acpi_os_read_pci_configuration(pci_id, 0x18, | |
721 | &tu8, 8); | |
1da177e4 LT |
722 | if (!ACPI_SUCCESS(status)) { |
723 | /* Certainly broken... FIX ME */ | |
724 | return; | |
725 | } | |
726 | *is_bridge = 1; | |
727 | pci_id->bus = tu8; | |
4be44fcd LB |
728 | status = |
729 | acpi_os_read_pci_configuration(pci_id, 0x19, | |
730 | &tu8, 8); | |
1da177e4 LT |
731 | if (ACPI_SUCCESS(status)) { |
732 | *bus_number = tu8; | |
733 | } | |
734 | } else | |
735 | *is_bridge = 0; | |
736 | } | |
737 | } | |
738 | } | |
739 | ||
4be44fcd LB |
740 | void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound */ |
741 | acpi_handle chandle, /* current node */ | |
742 | struct acpi_pci_id **id) | |
1da177e4 LT |
743 | { |
744 | int is_bridge = 1; | |
745 | u8 bus_number = (*id)->bus; | |
746 | ||
747 | acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number); | |
748 | } | |
749 | ||
65f27f38 | 750 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
751 | { |
752 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
753 | if (!dpc) { | |
754 | printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); | |
755 | return; | |
756 | } | |
757 | ||
758 | dpc->function(dpc->context); | |
759 | kfree(dpc); | |
760 | ||
d550d98d | 761 | return; |
1da177e4 LT |
762 | } |
763 | ||
b8d35192 AS |
764 | /******************************************************************************* |
765 | * | |
766 | * FUNCTION: acpi_os_execute | |
767 | * | |
768 | * PARAMETERS: Type - Type of the callback | |
769 | * Function - Function to be executed | |
770 | * Context - Function parameters | |
771 | * | |
772 | * RETURN: Status | |
773 | * | |
774 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
775 | * immediately executes function on a separate thread. | |
776 | * | |
777 | ******************************************************************************/ | |
778 | ||
779 | acpi_status acpi_os_execute(acpi_execute_type type, | |
4be44fcd | 780 | acpi_osd_exec_callback function, void *context) |
1da177e4 | 781 | { |
4be44fcd LB |
782 | acpi_status status = AE_OK; |
783 | struct acpi_os_dpc *dpc; | |
17bc54ee | 784 | struct workqueue_struct *queue; |
72945b2b LB |
785 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
786 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
787 | function, context)); | |
1da177e4 LT |
788 | |
789 | if (!function) | |
88db5e14 | 790 | return AE_BAD_PARAMETER; |
72945b2b | 791 | |
1da177e4 LT |
792 | /* |
793 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 794 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
795 | * way that allows us to also free its memory inside the callee. |
796 | * Because we may want to schedule several tasks with different | |
797 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 798 | * having a static work_struct. |
1da177e4 | 799 | */ |
72945b2b | 800 | |
65f27f38 | 801 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 802 | if (!dpc) |
b976fe19 LT |
803 | return_ACPI_STATUS(AE_NO_MEMORY); |
804 | ||
1da177e4 LT |
805 | dpc->function = function; |
806 | dpc->context = context; | |
b976fe19 | 807 | |
17bc54ee AS |
808 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
809 | queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq; | |
810 | if (!queue_work(queue, &dpc->work)) { | |
811 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
812 | "Call to queue_work() failed.\n")); | |
813 | status = AE_ERROR; | |
814 | kfree(dpc); | |
1da177e4 | 815 | } |
b976fe19 | 816 | return_ACPI_STATUS(status); |
1da177e4 | 817 | } |
4be44fcd | 818 | |
b8d35192 | 819 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 820 | |
4be44fcd | 821 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
822 | { |
823 | flush_workqueue(kacpid_wq); | |
824 | } | |
4be44fcd | 825 | |
1da177e4 LT |
826 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
827 | ||
828 | /* | |
829 | * Allocate the memory for a spinlock and initialize it. | |
830 | */ | |
967440e3 | 831 | acpi_status acpi_os_create_lock(acpi_spinlock * handle) |
1da177e4 | 832 | { |
967440e3 | 833 | spin_lock_init(*handle); |
1da177e4 | 834 | |
d550d98d | 835 | return AE_OK; |
1da177e4 LT |
836 | } |
837 | ||
1da177e4 LT |
838 | /* |
839 | * Deallocate the memory for a spinlock. | |
840 | */ | |
967440e3 | 841 | void acpi_os_delete_lock(acpi_spinlock handle) |
1da177e4 | 842 | { |
d550d98d | 843 | return; |
1da177e4 LT |
844 | } |
845 | ||
1da177e4 | 846 | acpi_status |
4be44fcd | 847 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 848 | { |
4be44fcd | 849 | struct semaphore *sem = NULL; |
1da177e4 | 850 | |
1da177e4 LT |
851 | |
852 | sem = acpi_os_allocate(sizeof(struct semaphore)); | |
853 | if (!sem) | |
d550d98d | 854 | return AE_NO_MEMORY; |
1da177e4 LT |
855 | memset(sem, 0, sizeof(struct semaphore)); |
856 | ||
857 | sema_init(sem, initial_units); | |
858 | ||
4be44fcd | 859 | *handle = (acpi_handle *) sem; |
1da177e4 | 860 | |
4be44fcd LB |
861 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
862 | *handle, initial_units)); | |
1da177e4 | 863 | |
d550d98d | 864 | return AE_OK; |
1da177e4 | 865 | } |
1da177e4 | 866 | |
1da177e4 LT |
867 | /* |
868 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
869 | * 'delete_semaphore()' function -- may result in an invalid | |
870 | * pointer dereference for non-synchronized consumers. Should | |
871 | * we at least check for blocked threads and signal/cancel them? | |
872 | */ | |
873 | ||
4be44fcd | 874 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 875 | { |
4be44fcd | 876 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 877 | |
1da177e4 LT |
878 | |
879 | if (!sem) | |
d550d98d | 880 | return AE_BAD_PARAMETER; |
1da177e4 | 881 | |
4be44fcd | 882 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 883 | |
02438d87 | 884 | kfree(sem); |
4be44fcd | 885 | sem = NULL; |
1da177e4 | 886 | |
d550d98d | 887 | return AE_OK; |
1da177e4 | 888 | } |
1da177e4 | 889 | |
1da177e4 LT |
890 | /* |
891 | * TODO: The kernel doesn't have a 'down_timeout' function -- had to | |
892 | * improvise. The process is to sleep for one scheduler quantum | |
893 | * until the semaphore becomes available. Downside is that this | |
894 | * may result in starvation for timeout-based waits when there's | |
895 | * lots of semaphore activity. | |
896 | * | |
897 | * TODO: Support for units > 1? | |
898 | */ | |
4be44fcd | 899 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 900 | { |
4be44fcd LB |
901 | acpi_status status = AE_OK; |
902 | struct semaphore *sem = (struct semaphore *)handle; | |
903 | int ret = 0; | |
1da177e4 | 904 | |
1da177e4 LT |
905 | |
906 | if (!sem || (units < 1)) | |
d550d98d | 907 | return AE_BAD_PARAMETER; |
1da177e4 LT |
908 | |
909 | if (units > 1) | |
d550d98d | 910 | return AE_SUPPORT; |
1da177e4 | 911 | |
4be44fcd LB |
912 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
913 | handle, units, timeout)); | |
1da177e4 | 914 | |
d68909f4 LB |
915 | /* |
916 | * This can be called during resume with interrupts off. | |
917 | * Like boot-time, we should be single threaded and will | |
918 | * always get the lock if we try -- timeout or not. | |
919 | * If this doesn't succeed, then we will oops courtesy of | |
920 | * might_sleep() in down(). | |
921 | */ | |
922 | if (!down_trylock(sem)) | |
923 | return AE_OK; | |
924 | ||
4be44fcd | 925 | switch (timeout) { |
1da177e4 LT |
926 | /* |
927 | * No Wait: | |
928 | * -------- | |
929 | * A zero timeout value indicates that we shouldn't wait - just | |
930 | * acquire the semaphore if available otherwise return AE_TIME | |
931 | * (a.k.a. 'would block'). | |
932 | */ | |
4be44fcd LB |
933 | case 0: |
934 | if (down_trylock(sem)) | |
1da177e4 LT |
935 | status = AE_TIME; |
936 | break; | |
937 | ||
938 | /* | |
939 | * Wait Indefinitely: | |
940 | * ------------------ | |
941 | */ | |
4be44fcd | 942 | case ACPI_WAIT_FOREVER: |
1da177e4 LT |
943 | down(sem); |
944 | break; | |
945 | ||
946 | /* | |
947 | * Wait w/ Timeout: | |
948 | * ---------------- | |
949 | */ | |
4be44fcd | 950 | default: |
1da177e4 LT |
951 | // TODO: A better timeout algorithm? |
952 | { | |
953 | int i = 0; | |
4be44fcd | 954 | static const int quantum_ms = 1000 / HZ; |
1da177e4 LT |
955 | |
956 | ret = down_trylock(sem); | |
dacd9b80 | 957 | for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) { |
01a527ec | 958 | schedule_timeout_interruptible(1); |
1da177e4 LT |
959 | ret = down_trylock(sem); |
960 | } | |
4be44fcd | 961 | |
1da177e4 LT |
962 | if (ret != 0) |
963 | status = AE_TIME; | |
964 | } | |
965 | break; | |
966 | } | |
967 | ||
968 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 969 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 970 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
971 | handle, units, timeout, |
972 | acpi_format_exception(status))); | |
973 | } else { | |
974 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 975 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 976 | units, timeout)); |
1da177e4 LT |
977 | } |
978 | ||
d550d98d | 979 | return status; |
1da177e4 | 980 | } |
1da177e4 | 981 | |
1da177e4 LT |
982 | /* |
983 | * TODO: Support for units > 1? | |
984 | */ | |
4be44fcd | 985 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 986 | { |
4be44fcd | 987 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 988 | |
1da177e4 LT |
989 | |
990 | if (!sem || (units < 1)) | |
d550d98d | 991 | return AE_BAD_PARAMETER; |
1da177e4 LT |
992 | |
993 | if (units > 1) | |
d550d98d | 994 | return AE_SUPPORT; |
1da177e4 | 995 | |
4be44fcd LB |
996 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
997 | units)); | |
1da177e4 LT |
998 | |
999 | up(sem); | |
1000 | ||
d550d98d | 1001 | return AE_OK; |
1da177e4 | 1002 | } |
4be44fcd | 1003 | |
1da177e4 | 1004 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1005 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1006 | { |
1007 | ||
1008 | #ifdef ENABLE_DEBUGGER | |
1009 | if (acpi_in_debugger) { | |
1010 | u32 chars; | |
1011 | ||
1012 | kdb_read(buffer, sizeof(line_buf)); | |
1013 | ||
1014 | /* remove the CR kdb includes */ | |
1015 | chars = strlen(buffer) - 1; | |
1016 | buffer[chars] = '\0'; | |
1017 | } | |
1018 | #endif | |
1019 | ||
1020 | return 0; | |
1021 | } | |
4be44fcd | 1022 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1023 | |
4be44fcd | 1024 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1025 | { |
4be44fcd | 1026 | switch (function) { |
1da177e4 LT |
1027 | case ACPI_SIGNAL_FATAL: |
1028 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1029 | break; | |
1030 | case ACPI_SIGNAL_BREAKPOINT: | |
1031 | /* | |
1032 | * AML Breakpoint | |
1033 | * ACPI spec. says to treat it as a NOP unless | |
1034 | * you are debugging. So if/when we integrate | |
1035 | * AML debugger into the kernel debugger its | |
1036 | * hook will go here. But until then it is | |
1037 | * not useful to print anything on breakpoints. | |
1038 | */ | |
1039 | break; | |
1040 | default: | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | return AE_OK; | |
1045 | } | |
4be44fcd | 1046 | |
4be44fcd | 1047 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1048 | { |
1049 | char *p = acpi_os_name; | |
4be44fcd | 1050 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1051 | |
1052 | if (!str || !*str) | |
1053 | return 0; | |
1054 | ||
1055 | for (; count-- && str && *str; str++) { | |
1056 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1057 | *p++ = *str; | |
1058 | else if (*str == '\'' || *str == '"') | |
1059 | continue; | |
1060 | else | |
1061 | break; | |
1062 | } | |
1063 | *p = 0; | |
1064 | ||
1065 | return 1; | |
4be44fcd | 1066 | |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1070 | ||
d4b7dc49 LB |
1071 | static void __init set_osi_linux(unsigned int enable) |
1072 | { | |
1073 | if (osi_linux.enable != enable) { | |
1074 | osi_linux.enable = enable; | |
1075 | printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n", | |
1076 | enable ? "Add": "Delet"); | |
1077 | } | |
1078 | return; | |
1079 | } | |
1080 | ||
1081 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1082 | { | |
1083 | osi_linux.cmdline = 1; /* cmdline set the default */ | |
1084 | set_osi_linux(enable); | |
1085 | ||
1086 | return; | |
1087 | } | |
1088 | ||
1089 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1090 | { | |
1091 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ | |
1092 | ||
1093 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); | |
1094 | ||
1095 | if (enable == -1) | |
1096 | return; | |
1097 | ||
1098 | osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */ | |
f507654d | 1099 | |
d4b7dc49 | 1100 | set_osi_linux(enable); |
f507654d | 1101 | |
f507654d LB |
1102 | return; |
1103 | } | |
1104 | ||
1da177e4 | 1105 | /* |
ae00d812 LB |
1106 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1107 | * | |
1da177e4 | 1108 | * empty string disables _OSI |
ae00d812 LB |
1109 | * string starting with '!' disables that string |
1110 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1111 | */ |
4be44fcd | 1112 | static int __init acpi_osi_setup(char *str) |
1da177e4 LT |
1113 | { |
1114 | if (str == NULL || *str == '\0') { | |
1115 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1116 | acpi_gbl_create_osi_method = FALSE; | |
aa2e09da | 1117 | } else if (!strcmp("!Linux", str)) { |
d4b7dc49 | 1118 | acpi_cmdline_osi_linux(0); /* !enable */ |
ae00d812 LB |
1119 | } else if (*str == '!') { |
1120 | if (acpi_osi_invalidate(++str) == AE_OK) | |
1121 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
f507654d | 1122 | } else if (!strcmp("Linux", str)) { |
d4b7dc49 | 1123 | acpi_cmdline_osi_linux(1); /* enable */ |
ae00d812 LB |
1124 | } else if (*osi_additional_string == '\0') { |
1125 | strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX); | |
1126 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | return 1; | |
1130 | } | |
1131 | ||
1132 | __setup("acpi_osi=", acpi_osi_setup); | |
1133 | ||
1134 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1135 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1136 | { |
1137 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1138 | ||
1139 | acpi_gbl_all_methods_serialized = TRUE; | |
1140 | ||
1141 | return 1; | |
1142 | } | |
1143 | ||
1144 | __setup("acpi_serialize", acpi_serialize_setup); | |
1145 | ||
1146 | /* | |
1147 | * Wake and Run-Time GPES are expected to be separate. | |
1148 | * We disable wake-GPEs at run-time to prevent spurious | |
1149 | * interrupts. | |
1150 | * | |
1151 | * However, if a system exists that shares Wake and | |
1152 | * Run-time events on the same GPE this flag is available | |
1153 | * to tell Linux to keep the wake-time GPEs enabled at run-time. | |
1154 | */ | |
4be44fcd | 1155 | static int __init acpi_wake_gpes_always_on_setup(char *str) |
1da177e4 LT |
1156 | { |
1157 | printk(KERN_INFO PREFIX "wake GPEs not disabled\n"); | |
1158 | ||
1159 | acpi_gbl_leave_wake_gpes_disabled = FALSE; | |
1160 | ||
1161 | return 1; | |
1162 | } | |
1163 | ||
1164 | __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup); | |
1165 | ||
df92e695 TR |
1166 | /* Check of resource interference between native drivers and ACPI |
1167 | * OperationRegions (SystemIO and System Memory only). | |
1168 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1169 | * in arbitrary AML code and can interfere with legacy drivers. | |
1170 | * acpi_enforce_resources= can be set to: | |
1171 | * | |
1172 | * - strict (2) | |
1173 | * -> further driver trying to access the resources will not load | |
1174 | * - lax (default) (1) | |
1175 | * -> further driver trying to access the resources will load, but you | |
1176 | * get a system message that something might go wrong... | |
1177 | * | |
1178 | * - no (0) | |
1179 | * -> ACPI Operation Region resources will not be registered | |
1180 | * | |
1181 | */ | |
1182 | #define ENFORCE_RESOURCES_STRICT 2 | |
1183 | #define ENFORCE_RESOURCES_LAX 1 | |
1184 | #define ENFORCE_RESOURCES_NO 0 | |
1185 | ||
1186 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1187 | ||
1188 | static int __init acpi_enforce_resources_setup(char *str) | |
1189 | { | |
1190 | if (str == NULL || *str == '\0') | |
1191 | return 0; | |
1192 | ||
1193 | if (!strcmp("strict", str)) | |
1194 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1195 | else if (!strcmp("lax", str)) | |
1196 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1197 | else if (!strcmp("no", str)) | |
1198 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1199 | ||
1200 | return 1; | |
1201 | } | |
1202 | ||
1203 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1204 | ||
1205 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1206 | * drivers */ | |
443dea72 | 1207 | int acpi_check_resource_conflict(struct resource *res) |
df92e695 TR |
1208 | { |
1209 | struct acpi_res_list *res_list_elem; | |
1210 | int ioport; | |
1211 | int clash = 0; | |
1212 | ||
1213 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1214 | return 0; | |
1215 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1216 | return 0; | |
1217 | ||
1218 | ioport = res->flags & IORESOURCE_IO; | |
1219 | ||
1220 | spin_lock(&acpi_res_lock); | |
1221 | list_for_each_entry(res_list_elem, &resource_list_head, | |
1222 | resource_list) { | |
1223 | if (ioport && (res_list_elem->resource_type | |
1224 | != ACPI_ADR_SPACE_SYSTEM_IO)) | |
1225 | continue; | |
1226 | if (!ioport && (res_list_elem->resource_type | |
1227 | != ACPI_ADR_SPACE_SYSTEM_MEMORY)) | |
1228 | continue; | |
1229 | ||
1230 | if (res->end < res_list_elem->start | |
1231 | || res_list_elem->end < res->start) | |
1232 | continue; | |
1233 | clash = 1; | |
1234 | break; | |
1235 | } | |
1236 | spin_unlock(&acpi_res_lock); | |
1237 | ||
1238 | if (clash) { | |
1239 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
1240 | printk(KERN_INFO "%sACPI: %s resource %s [0x%llx-0x%llx]" | |
1241 | " conflicts with ACPI region %s" | |
1242 | " [0x%llx-0x%llx]\n", | |
1243 | acpi_enforce_resources == ENFORCE_RESOURCES_LAX | |
1244 | ? KERN_WARNING : KERN_ERR, | |
1245 | ioport ? "I/O" : "Memory", res->name, | |
1246 | (long long) res->start, (long long) res->end, | |
1247 | res_list_elem->name, | |
1248 | (long long) res_list_elem->start, | |
1249 | (long long) res_list_elem->end); | |
1250 | printk(KERN_INFO "ACPI: Device needs an ACPI driver\n"); | |
1251 | } | |
1252 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1253 | return -EBUSY; | |
1254 | } | |
1255 | return 0; | |
1256 | } | |
443dea72 | 1257 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1258 | |
1259 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1260 | const char *name) | |
1261 | { | |
1262 | struct resource res = { | |
1263 | .start = start, | |
1264 | .end = start + n - 1, | |
1265 | .name = name, | |
1266 | .flags = IORESOURCE_IO, | |
1267 | }; | |
1268 | ||
1269 | return acpi_check_resource_conflict(&res); | |
1270 | } | |
1271 | EXPORT_SYMBOL(acpi_check_region); | |
1272 | ||
1273 | int acpi_check_mem_region(resource_size_t start, resource_size_t n, | |
1274 | const char *name) | |
1275 | { | |
1276 | struct resource res = { | |
1277 | .start = start, | |
1278 | .end = start + n - 1, | |
1279 | .name = name, | |
1280 | .flags = IORESOURCE_MEM, | |
1281 | }; | |
1282 | ||
1283 | return acpi_check_resource_conflict(&res); | |
1284 | ||
1285 | } | |
1286 | EXPORT_SYMBOL(acpi_check_mem_region); | |
1287 | ||
73459f73 RM |
1288 | /* |
1289 | * Acquire a spinlock. | |
1290 | * | |
1291 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1292 | */ |
1293 | ||
967440e3 | 1294 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1295 | { |
b8e4d893 | 1296 | acpi_cpu_flags flags; |
967440e3 | 1297 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1298 | return flags; |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * Release a spinlock. See above. | |
1303 | */ | |
1304 | ||
967440e3 | 1305 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1306 | { |
967440e3 | 1307 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1308 | } |
1309 | ||
73459f73 RM |
1310 | #ifndef ACPI_USE_LOCAL_CACHE |
1311 | ||
1312 | /******************************************************************************* | |
1313 | * | |
1314 | * FUNCTION: acpi_os_create_cache | |
1315 | * | |
b229cf92 BM |
1316 | * PARAMETERS: name - Ascii name for the cache |
1317 | * size - Size of each cached object | |
1318 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1319 | * cache - Where the new cache object is returned | |
73459f73 | 1320 | * |
b229cf92 | 1321 | * RETURN: status |
73459f73 RM |
1322 | * |
1323 | * DESCRIPTION: Create a cache object | |
1324 | * | |
1325 | ******************************************************************************/ | |
1326 | ||
1327 | acpi_status | |
4be44fcd | 1328 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1329 | { |
20c2df83 | 1330 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1331 | if (*cache == NULL) |
b229cf92 BM |
1332 | return AE_ERROR; |
1333 | else | |
1334 | return AE_OK; | |
73459f73 RM |
1335 | } |
1336 | ||
1337 | /******************************************************************************* | |
1338 | * | |
1339 | * FUNCTION: acpi_os_purge_cache | |
1340 | * | |
1341 | * PARAMETERS: Cache - Handle to cache object | |
1342 | * | |
1343 | * RETURN: Status | |
1344 | * | |
1345 | * DESCRIPTION: Free all objects within the requested cache. | |
1346 | * | |
1347 | ******************************************************************************/ | |
1348 | ||
4be44fcd | 1349 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1350 | { |
50dd0969 | 1351 | kmem_cache_shrink(cache); |
4be44fcd | 1352 | return (AE_OK); |
73459f73 RM |
1353 | } |
1354 | ||
1355 | /******************************************************************************* | |
1356 | * | |
1357 | * FUNCTION: acpi_os_delete_cache | |
1358 | * | |
1359 | * PARAMETERS: Cache - Handle to cache object | |
1360 | * | |
1361 | * RETURN: Status | |
1362 | * | |
1363 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1364 | * cache object. | |
1365 | * | |
1366 | ******************************************************************************/ | |
1367 | ||
4be44fcd | 1368 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1369 | { |
1a1d92c1 | 1370 | kmem_cache_destroy(cache); |
4be44fcd | 1371 | return (AE_OK); |
73459f73 RM |
1372 | } |
1373 | ||
1374 | /******************************************************************************* | |
1375 | * | |
1376 | * FUNCTION: acpi_os_release_object | |
1377 | * | |
1378 | * PARAMETERS: Cache - Handle to cache object | |
1379 | * Object - The object to be released | |
1380 | * | |
1381 | * RETURN: None | |
1382 | * | |
1383 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1384 | * the object is deleted. | |
1385 | * | |
1386 | ******************************************************************************/ | |
1387 | ||
4be44fcd | 1388 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1389 | { |
4be44fcd LB |
1390 | kmem_cache_free(cache, object); |
1391 | return (AE_OK); | |
73459f73 RM |
1392 | } |
1393 | ||
5a4e1432 LB |
1394 | /** |
1395 | * acpi_dmi_dump - dump DMI slots needed for blacklist entry | |
1396 | * | |
1397 | * Returns 0 on success | |
1398 | */ | |
12d3931c | 1399 | static int acpi_dmi_dump(void) |
5a4e1432 LB |
1400 | { |
1401 | ||
1402 | if (!dmi_available) | |
1403 | return -1; | |
1404 | ||
1405 | printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n", | |
e6298c6d | 1406 | dmi_get_system_info(DMI_SYS_VENDOR)); |
5a4e1432 | 1407 | printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n", |
e6298c6d | 1408 | dmi_get_system_info(DMI_PRODUCT_NAME)); |
5a4e1432 | 1409 | printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n", |
e6298c6d | 1410 | dmi_get_system_info(DMI_PRODUCT_VERSION)); |
5a4e1432 | 1411 | printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n", |
e6298c6d | 1412 | dmi_get_system_info(DMI_BOARD_NAME)); |
5a4e1432 | 1413 | printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n", |
e6298c6d | 1414 | dmi_get_system_info(DMI_BIOS_VENDOR)); |
5a4e1432 | 1415 | printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n", |
e6298c6d | 1416 | dmi_get_system_info(DMI_BIOS_DATE)); |
5a4e1432 LB |
1417 | |
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | ||
b229cf92 BM |
1422 | /****************************************************************************** |
1423 | * | |
1424 | * FUNCTION: acpi_os_validate_interface | |
1425 | * | |
1426 | * PARAMETERS: interface - Requested interface to be validated | |
1427 | * | |
1428 | * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise | |
1429 | * | |
1430 | * DESCRIPTION: Match an interface string to the interfaces supported by the | |
1431 | * host. Strings originate from an AML call to the _OSI method. | |
1432 | * | |
1433 | *****************************************************************************/ | |
1434 | ||
1435 | acpi_status | |
1436 | acpi_os_validate_interface (char *interface) | |
1437 | { | |
ae00d812 LB |
1438 | if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX)) |
1439 | return AE_OK; | |
f507654d | 1440 | if (!strcmp("Linux", interface)) { |
d4b7dc49 | 1441 | |
f40cd6fd | 1442 | printk(KERN_NOTICE PREFIX |
d4b7dc49 LB |
1443 | "BIOS _OSI(Linux) query %s%s\n", |
1444 | osi_linux.enable ? "honored" : "ignored", | |
1445 | osi_linux.cmdline ? " via cmdline" : | |
1446 | osi_linux.dmi ? " via DMI" : ""); | |
1447 | ||
1448 | if (!osi_linux.dmi) { | |
1449 | if (acpi_dmi_dump()) | |
1450 | printk(KERN_NOTICE PREFIX | |
1451 | "[please extract dmidecode output]\n"); | |
1452 | printk(KERN_NOTICE PREFIX | |
1453 | "Please send DMI info above to " | |
1454 | "linux-acpi@vger.kernel.org\n"); | |
1455 | } | |
1456 | if (!osi_linux.known && !osi_linux.cmdline) { | |
1457 | printk(KERN_NOTICE PREFIX | |
1458 | "If \"acpi_osi=%sLinux\" works better, " | |
1459 | "please notify linux-acpi@vger.kernel.org\n", | |
1460 | osi_linux.enable ? "!" : ""); | |
1461 | } | |
1462 | ||
1463 | if (osi_linux.enable) | |
f507654d LB |
1464 | return AE_OK; |
1465 | } | |
ae00d812 | 1466 | return AE_SUPPORT; |
b229cf92 BM |
1467 | } |
1468 | ||
b229cf92 BM |
1469 | /****************************************************************************** |
1470 | * | |
1471 | * FUNCTION: acpi_os_validate_address | |
1472 | * | |
1473 | * PARAMETERS: space_id - ACPI space ID | |
1474 | * address - Physical address | |
1475 | * length - Address length | |
1476 | * | |
1477 | * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, | |
1478 | * should return AE_AML_ILLEGAL_ADDRESS. | |
1479 | * | |
1480 | * DESCRIPTION: Validate a system address via the host OS. Used to validate | |
1481 | * the addresses accessed by AML operation regions. | |
1482 | * | |
1483 | *****************************************************************************/ | |
1484 | ||
1485 | acpi_status | |
1486 | acpi_os_validate_address ( | |
1487 | u8 space_id, | |
1488 | acpi_physical_address address, | |
df92e695 TR |
1489 | acpi_size length, |
1490 | char *name) | |
b229cf92 | 1491 | { |
df92e695 TR |
1492 | struct acpi_res_list *res; |
1493 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1494 | return AE_OK; | |
b229cf92 | 1495 | |
df92e695 TR |
1496 | switch (space_id) { |
1497 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
1498 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
1499 | /* Only interference checks against SystemIO and SytemMemory | |
1500 | are needed */ | |
1501 | res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); | |
1502 | if (!res) | |
1503 | return AE_OK; | |
1504 | /* ACPI names are fixed to 4 bytes, still better use strlcpy */ | |
1505 | strlcpy(res->name, name, 5); | |
1506 | res->start = address; | |
1507 | res->end = address + length - 1; | |
1508 | res->resource_type = space_id; | |
1509 | spin_lock(&acpi_res_lock); | |
1510 | list_add(&res->resource_list, &resource_list_head); | |
1511 | spin_unlock(&acpi_res_lock); | |
1512 | pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, " | |
1513 | "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
1514 | ? "SystemIO" : "System Memory", | |
1515 | (unsigned long long)res->start, | |
1516 | (unsigned long long)res->end, | |
1517 | res->name); | |
1518 | break; | |
1519 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
1520 | case ACPI_ADR_SPACE_EC: | |
1521 | case ACPI_ADR_SPACE_SMBUS: | |
1522 | case ACPI_ADR_SPACE_CMOS: | |
1523 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
1524 | case ACPI_ADR_SPACE_DATA_TABLE: | |
1525 | case ACPI_ADR_SPACE_FIXED_HARDWARE: | |
1526 | break; | |
1527 | } | |
1528 | return AE_OK; | |
b229cf92 BM |
1529 | } |
1530 | ||
73459f73 | 1531 | #endif |