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1/******************************************************************************
2 *
3 * Module Name: utaddress - op_region address range check
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acnamesp.h"
47
48#define _COMPONENT ACPI_UTILITIES
49ACPI_MODULE_NAME("utaddress")
50
51/*******************************************************************************
52 *
53 * FUNCTION: acpi_ut_add_address_range
54 *
55 * PARAMETERS: space_id - Address space ID
56 * address - op_region start address
57 * length - op_region length
58 * region_node - op_region namespace node
59 *
60 * RETURN: Status
61 *
62 * DESCRIPTION: Add the Operation Region address range to the global list.
63 * The only supported Space IDs are Memory and I/O. Called when
64 * the op_region address/length operands are fully evaluated.
65 *
66 * MUTEX: Locks the namespace
67 *
68 * NOTE: Because this interface is only called when an op_region argument
69 * list is evaluated, there cannot be any duplicate region_nodes.
70 * Duplicate Address/Length values are allowed, however, so that multiple
71 * address conflicts can be detected.
72 *
73 ******************************************************************************/
74acpi_status
75acpi_ut_add_address_range(acpi_adr_space_type space_id,
76 acpi_physical_address address,
77 u32 length, struct acpi_namespace_node *region_node)
78{
79 struct acpi_address_range *range_info;
80 acpi_status status;
81
82 ACPI_FUNCTION_TRACE(ut_add_address_range);
83
84 if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
85 (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
86 return_ACPI_STATUS(AE_OK);
87 }
88
89 /* Allocate/init a new info block, add it to the appropriate list */
90
91 range_info = ACPI_ALLOCATE(sizeof(struct acpi_address_range));
92 if (!range_info) {
93 return_ACPI_STATUS(AE_NO_MEMORY);
94 }
95
96 range_info->start_address = address;
97 range_info->end_address = (address + length - 1);
98 range_info->region_node = region_node;
99
100 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
101 if (ACPI_FAILURE(status)) {
102 ACPI_FREE(range_info);
103 return_ACPI_STATUS(status);
104 }
105
106 range_info->next = acpi_gbl_address_range_list[space_id];
107 acpi_gbl_address_range_list[space_id] = range_info;
108
109 ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
110 "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
111 acpi_ut_get_node_name(range_info->region_node),
112 ACPI_FORMAT_UINT64(address),
113 ACPI_FORMAT_UINT64(range_info->end_address)));
114
115 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
116 return_ACPI_STATUS(AE_OK);
117}
118
119/*******************************************************************************
120 *
121 * FUNCTION: acpi_ut_remove_address_range
122 *
123 * PARAMETERS: space_id - Address space ID
124 * region_node - op_region namespace node
125 *
126 * RETURN: None
127 *
128 * DESCRIPTION: Remove the Operation Region from the global list. The only
129 * supported Space IDs are Memory and I/O. Called when an
130 * op_region is deleted.
131 *
132 * MUTEX: Assumes the namespace is locked
133 *
134 ******************************************************************************/
135
136void
137acpi_ut_remove_address_range(acpi_adr_space_type space_id,
138 struct acpi_namespace_node *region_node)
139{
140 struct acpi_address_range *range_info;
141 struct acpi_address_range *prev;
142
143 ACPI_FUNCTION_TRACE(ut_remove_address_range);
144
145 if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
146 (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
147 return_VOID;
148 }
149
150 /* Get the appropriate list head and check the list */
151
152 range_info = prev = acpi_gbl_address_range_list[space_id];
153 while (range_info) {
154 if (range_info->region_node == region_node) {
155 if (range_info == prev) { /* Found at list head */
156 acpi_gbl_address_range_list[space_id] =
157 range_info->next;
158 } else {
159 prev->next = range_info->next;
160 }
161
162 ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
163 "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
164 acpi_ut_get_node_name(range_info->
165 region_node),
166 ACPI_FORMAT_UINT64(range_info->
167 start_address),
168 ACPI_FORMAT_UINT64(range_info->
169 end_address)));
170
171 ACPI_FREE(range_info);
172 return_VOID;
173 }
174
175 prev = range_info;
176 range_info = range_info->next;
177 }
178
179 return_VOID;
180}
181
182/*******************************************************************************
183 *
184 * FUNCTION: acpi_ut_check_address_range
185 *
186 * PARAMETERS: space_id - Address space ID
187 * address - Start address
188 * length - Length of address range
189 * warn - TRUE if warning on overlap desired
190 *
191 * RETURN: Count of the number of conflicts detected. Zero is always
192 * returned for Space IDs other than Memory or I/O.
193 *
194 * DESCRIPTION: Check if the input address range overlaps any of the
195 * ASL operation region address ranges. The only supported
196 * Space IDs are Memory and I/O.
197 *
198 * MUTEX: Assumes the namespace is locked.
199 *
200 ******************************************************************************/
201
202u32
203acpi_ut_check_address_range(acpi_adr_space_type space_id,
204 acpi_physical_address address, u32 length, u8 warn)
205{
206 struct acpi_address_range *range_info;
207 acpi_physical_address end_address;
208 char *pathname;
209 u32 overlap_count = 0;
210
211 ACPI_FUNCTION_TRACE(ut_check_address_range);
212
213 if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
214 (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
215 return_UINT32(0);
216 }
217
218 range_info = acpi_gbl_address_range_list[space_id];
219 end_address = address + length - 1;
220
221 /* Check entire list for all possible conflicts */
222
223 while (range_info) {
224 /*
225 * Check if the requested address/length overlaps this
226 * address range. There are four cases to consider:
227 *
228 * 1) Input address/length is contained completely in the
229 * address range
230 * 2) Input address/length overlaps range at the range start
231 * 3) Input address/length overlaps range at the range end
232 * 4) Input address/length completely encompasses the range
233 */
234 if ((address <= range_info->end_address) &&
235 (end_address >= range_info->start_address)) {
236
237 /* Found an address range overlap */
238
239 overlap_count++;
240 if (warn) { /* Optional warning message */
241 pathname =
242 acpi_ns_get_normalized_pathname(range_info->
243 region_node,
244 TRUE);
245
246 ACPI_WARNING((AE_INFO,
247 "%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)",
248 acpi_ut_get_region_name(space_id),
249 ACPI_FORMAT_UINT64(address),
250 ACPI_FORMAT_UINT64(end_address),
251 ACPI_FORMAT_UINT64(range_info->
252 start_address),
253 ACPI_FORMAT_UINT64(range_info->
254 end_address),
255 pathname));
256 ACPI_FREE(pathname);
257 }
258 }
259
260 range_info = range_info->next;
261 }
262
263 return_UINT32(overlap_count);
264}
265
266/*******************************************************************************
267 *
268 * FUNCTION: acpi_ut_delete_address_lists
269 *
270 * PARAMETERS: None
271 *
272 * RETURN: None
273 *
274 * DESCRIPTION: Delete all global address range lists (called during
275 * subsystem shutdown).
276 *
277 ******************************************************************************/
278
279void acpi_ut_delete_address_lists(void)
280{
281 struct acpi_address_range *next;
282 struct acpi_address_range *range_info;
283 int i;
284
285 /* Delete all elements in all address range lists */
286
287 for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
288 next = acpi_gbl_address_range_list[i];
289
290 while (next) {
291 range_info = next;
292 next = range_info->next;
293 ACPI_FREE(range_info);
294 }
295
296 acpi_gbl_address_range_list[i] = NULL;
297 }
298}