summaryrefslogtreecommitdiff
path: root/drivers/acpi/acpica/tbinstal.c
blob: 00be16da1ee2c26ee01098a181c41db39b393a66 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
/******************************************************************************
 *
 * Module Name: tbinstal - ACPI table installation and removal
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2018, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "actables.h"

#define _COMPONENT          ACPI_TABLES
ACPI_MODULE_NAME("tbinstal")

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_install_table_with_override
 *
 * PARAMETERS:  new_table_desc          - New table descriptor to install
 *              override                - Whether override should be performed
 *              table_index             - Where the table index is returned
 *
 * RETURN:      None
 *
 * DESCRIPTION: Install an ACPI table into the global data structure. The
 *              table override mechanism is called to allow the host
 *              OS to replace any table before it is installed in the root
 *              table array.
 *
 ******************************************************************************/
void
acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc,
				    u8 override, u32 *table_index)
{
	u32 i;
	acpi_status status;

	status = acpi_tb_get_next_table_descriptor(&i, NULL);
	if (ACPI_FAILURE(status)) {
		return;
	}

	/*
	 * ACPI Table Override:
	 *
	 * Before we install the table, let the host OS override it with a new
	 * one if desired. Any table within the RSDT/XSDT can be replaced,
	 * including the DSDT which is pointed to by the FADT.
	 */
	if (override) {
		acpi_tb_override_table(new_table_desc);
	}

	acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list.tables[i],
				      new_table_desc->address,
				      new_table_desc->flags,
				      new_table_desc->pointer);

	acpi_tb_print_table_header(new_table_desc->address,
				   new_table_desc->pointer);

	/* This synchronizes acpi_gbl_dsdt_index */

	*table_index = i;

	/* Set the global integer width (based upon revision of the DSDT) */

	if (i == acpi_gbl_dsdt_index) {
		acpi_ut_set_integer_width(new_table_desc->pointer->revision);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_install_standard_table
 *
 * PARAMETERS:  address             - Address of the table (might be a virtual
 *                                    address depending on the table_flags)
 *              flags               - Flags for the table
 *              reload              - Whether reload should be performed
 *              override            - Whether override should be performed
 *              table_index         - Where the table index is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to verify and install an ACPI table.
 *              When this function is called by "Load" or "LoadTable" opcodes,
 *              or by acpi_load_table() API, the "Reload" parameter is set.
 *              After sucessfully returning from this function, table is
 *              "INSTALLED" but not "VALIDATED".
 *
 ******************************************************************************/

acpi_status
acpi_tb_install_standard_table(acpi_physical_address address,
			       u8 flags,
			       u8 reload, u8 override, u32 *table_index)
{
	u32 i;
	acpi_status status = AE_OK;
	struct acpi_table_desc new_table_desc;

	ACPI_FUNCTION_TRACE(tb_install_standard_table);

	/* Acquire a temporary table descriptor for validation */

	status = acpi_tb_acquire_temp_table(&new_table_desc, address, flags);
	if (ACPI_FAILURE(status)) {
		ACPI_ERROR((AE_INFO,
			    "Could not acquire table length at %8.8X%8.8X",
			    ACPI_FORMAT_UINT64(address)));
		return_ACPI_STATUS(status);
	}

	/*
	 * Optionally do not load any SSDTs from the RSDT/XSDT. This can
	 * be useful for debugging ACPI problems on some machines.
	 */
	if (!reload &&
	    acpi_gbl_disable_ssdt_table_install &&
	    ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) {
		ACPI_INFO(("Ignoring installation of %4.4s at %8.8X%8.8X",
			   new_table_desc.signature.ascii,
			   ACPI_FORMAT_UINT64(address)));
		goto release_and_exit;
	}

	/* Acquire the table lock */

	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

	/* Validate and verify a table before installation */

	status = acpi_tb_verify_temp_table(&new_table_desc, NULL, &i);
	if (ACPI_FAILURE(status)) {
		if (status == AE_CTRL_TERMINATE) {
			/*
			 * Table was unloaded, allow it to be reloaded.
			 * As we are going to return AE_OK to the caller, we should
			 * take the responsibility of freeing the input descriptor.
			 * Refill the input descriptor to ensure
			 * acpi_tb_install_table_with_override() can be called again to
			 * indicate the re-installation.
			 */
			acpi_tb_uninstall_table(&new_table_desc);
			(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
			*table_index = i;
			return_ACPI_STATUS(AE_OK);
		}
		goto unlock_and_exit;
	}

	/* Add the table to the global root table list */

	acpi_tb_install_table_with_override(&new_table_desc, override,
					    table_index);

	/* Invoke table handler */

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
	acpi_tb_notify_table(ACPI_TABLE_EVENT_INSTALL, new_table_desc.pointer);
	(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);

unlock_and_exit:

	/* Release the table lock */

	(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);

release_and_exit:

	/* Release the temporary table descriptor */

	acpi_tb_release_temp_table(&new_table_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_override_table
 *
 * PARAMETERS:  old_table_desc      - Validated table descriptor to be
 *                                    overridden
 *
 * RETURN:      None
 *
 * DESCRIPTION: Attempt table override by calling the OSL override functions.
 *              Note: If the table is overridden, then the entire new table
 *              is acquired and returned by this function.
 *              Before/after invocation, the table descriptor is in a state
 *              that is "VALIDATED".
 *
 ******************************************************************************/

void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
{
	acpi_status status;
	char *override_type;
	struct acpi_table_desc new_table_desc;
	struct acpi_table_header *table;
	acpi_physical_address address;
	u32 length;

	/* (1) Attempt logical override (returns a logical address) */

	status = acpi_os_table_override(old_table_desc->pointer, &table);
	if (ACPI_SUCCESS(status) && table) {
		acpi_tb_acquire_temp_table(&new_table_desc,
					   ACPI_PTR_TO_PHYSADDR(table),
					   ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL);
		override_type = "Logical";
		goto finish_override;
	}

	/* (2) Attempt physical override (returns a physical address) */

	status = acpi_os_physical_table_override(old_table_desc->pointer,
						 &address, &length);
	if (ACPI_SUCCESS(status) && address && length) {
		acpi_tb_acquire_temp_table(&new_table_desc, address,
					   ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
		override_type = "Physical";
		goto finish_override;
	}

	return;			/* There was no override */

finish_override:

	/*
	 * Validate and verify a table before overriding, no nested table
	 * duplication check as it's too complicated and unnecessary.
	 */
	status = acpi_tb_verify_temp_table(&new_table_desc, NULL, NULL);
	if (ACPI_FAILURE(status)) {
		return;
	}

	ACPI_INFO(("%4.4s 0x%8.8X%8.8X"
		   " %s table override, new table: 0x%8.8X%8.8X",
		   old_table_desc->signature.ascii,
		   ACPI_FORMAT_UINT64(old_table_desc->address),
		   override_type, ACPI_FORMAT_UINT64(new_table_desc.address)));

	/* We can now uninstall the original table */

	acpi_tb_uninstall_table(old_table_desc);

	/*
	 * Replace the original table descriptor and keep its state as
	 * "VALIDATED".
	 */
	acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address,
				      new_table_desc.flags,
				      new_table_desc.pointer);
	acpi_tb_validate_temp_table(old_table_desc);

	/* Release the temporary table descriptor */

	acpi_tb_release_temp_table(&new_table_desc);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_uninstall_table
 *
 * PARAMETERS:  table_desc          - Table descriptor
 *
 * RETURN:      None
 *
 * DESCRIPTION: Delete one internal ACPI table
 *
 ******************************************************************************/

void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
{

	ACPI_FUNCTION_TRACE(tb_uninstall_table);

	/* Table must be installed */

	if (!table_desc->address) {
		return_VOID;
	}

	acpi_tb_invalidate_table(table_desc);

	if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
	    ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
		ACPI_FREE(ACPI_PHYSADDR_TO_PTR(table_desc->address));
	}

	table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
	return_VOID;
}