1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2017 Intel Deutschland GmbH
4 * Copyright (C) 2019-2024 Intel Corporation
5 */
6 #include <linux/uuid.h>
7 #include "iwl-drv.h"
8 #include "iwl-debug.h"
9 #include "acpi.h"
10 #include "fw/runtime.h"
11
12 const guid_t iwl_guid = GUID_INIT(0xF21202BF, 0x8F78, 0x4DC6,
13 0xA5, 0xB3, 0x1F, 0x73,
14 0x8E, 0x28, 0x5A, 0xDE);
15
16 static const size_t acpi_dsm_size[DSM_FUNC_NUM_FUNCS] = {
17 [DSM_FUNC_QUERY] = sizeof(u32),
18 [DSM_FUNC_DISABLE_SRD] = sizeof(u8),
19 [DSM_FUNC_ENABLE_INDONESIA_5G2] = sizeof(u8),
20 [DSM_FUNC_ENABLE_6E] = sizeof(u32),
21 [DSM_FUNC_REGULATORY_CONFIG] = sizeof(u32),
22 /* Not supported in driver */
23 [5] = (size_t)0,
24 [DSM_FUNC_11AX_ENABLEMENT] = sizeof(u32),
25 [DSM_FUNC_ENABLE_UNII4_CHAN] = sizeof(u32),
26 [DSM_FUNC_ACTIVATE_CHANNEL] = sizeof(u32),
27 [DSM_FUNC_FORCE_DISABLE_CHANNELS] = sizeof(u32),
28 [DSM_FUNC_ENERGY_DETECTION_THRESHOLD] = sizeof(u32),
29 [DSM_FUNC_RFI_CONFIG] = sizeof(u32),
30 [DSM_FUNC_ENABLE_11BE] = sizeof(u32),
31 };
32
iwl_acpi_get_handle(struct device * dev,acpi_string method,acpi_handle * ret_handle)33 static int iwl_acpi_get_handle(struct device *dev, acpi_string method,
34 acpi_handle *ret_handle)
35 {
36 acpi_handle root_handle;
37 acpi_status status;
38
39 root_handle = ACPI_HANDLE(dev);
40 if (!root_handle) {
41 IWL_DEBUG_DEV_RADIO(dev,
42 "ACPI: Could not retrieve root port handle\n");
43 return -ENOENT;
44 }
45
46 status = acpi_get_handle(root_handle, method, ret_handle);
47 if (ACPI_FAILURE(status)) {
48 IWL_DEBUG_DEV_RADIO(dev,
49 "ACPI: %s method not found\n", method);
50 return -ENOENT;
51 }
52 return 0;
53 }
54
iwl_acpi_get_object(struct device * dev,acpi_string method)55 static void *iwl_acpi_get_object(struct device *dev, acpi_string method)
56 {
57 struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
58 acpi_handle handle;
59 acpi_status status;
60 int ret;
61
62 ret = iwl_acpi_get_handle(dev, method, &handle);
63 if (ret)
64 return ERR_PTR(-ENOENT);
65
66 /* Call the method with no arguments */
67 status = acpi_evaluate_object(handle, NULL, NULL, &buf);
68 if (ACPI_FAILURE(status)) {
69 IWL_DEBUG_DEV_RADIO(dev,
70 "ACPI: %s method invocation failed (status: 0x%x)\n",
71 method, status);
72 return ERR_PTR(-ENOENT);
73 }
74 return buf.pointer;
75 }
76
77 /*
78 * Generic function for evaluating a method defined in the device specific
79 * method (DSM) interface. The returned acpi object must be freed by calling
80 * function.
81 */
iwl_acpi_get_dsm_object(struct device * dev,int rev,int func,union acpi_object * args,const guid_t * guid)82 static void *iwl_acpi_get_dsm_object(struct device *dev, int rev, int func,
83 union acpi_object *args,
84 const guid_t *guid)
85 {
86 union acpi_object *obj;
87
88 obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), guid, rev, func,
89 args);
90 if (!obj) {
91 IWL_DEBUG_DEV_RADIO(dev,
92 "ACPI: DSM method invocation failed (rev: %d, func:%d)\n",
93 rev, func);
94 return ERR_PTR(-ENOENT);
95 }
96 return obj;
97 }
98
99 /*
100 * Generic function to evaluate a DSM with no arguments
101 * and an integer return value,
102 * (as an integer object or inside a buffer object),
103 * verify and assign the value in the "value" parameter.
104 * return 0 in success and the appropriate errno otherwise.
105 */
iwl_acpi_get_dsm_integer(struct device * dev,int rev,int func,const guid_t * guid,u64 * value,size_t expected_size)106 static int iwl_acpi_get_dsm_integer(struct device *dev, int rev, int func,
107 const guid_t *guid, u64 *value,
108 size_t expected_size)
109 {
110 union acpi_object *obj;
111 int ret = 0;
112
113 obj = iwl_acpi_get_dsm_object(dev, rev, func, NULL, guid);
114 if (IS_ERR(obj)) {
115 IWL_DEBUG_DEV_RADIO(dev,
116 "Failed to get DSM object. func= %d\n",
117 func);
118 return -ENOENT;
119 }
120
121 if (obj->type == ACPI_TYPE_INTEGER) {
122 *value = obj->integer.value;
123 } else if (obj->type == ACPI_TYPE_BUFFER) {
124 __le64 le_value = 0;
125
126 if (WARN_ON_ONCE(expected_size > sizeof(le_value)))
127 return -EINVAL;
128
129 /* if the buffer size doesn't match the expected size */
130 if (obj->buffer.length != expected_size)
131 IWL_DEBUG_DEV_RADIO(dev,
132 "ACPI: DSM invalid buffer size, padding or truncating (%d)\n",
133 obj->buffer.length);
134
135 /* assuming LE from Intel BIOS spec */
136 memcpy(&le_value, obj->buffer.pointer,
137 min_t(size_t, expected_size, (size_t)obj->buffer.length));
138 *value = le64_to_cpu(le_value);
139 } else {
140 IWL_DEBUG_DEV_RADIO(dev,
141 "ACPI: DSM method did not return a valid object, type=%d\n",
142 obj->type);
143 ret = -EINVAL;
144 goto out;
145 }
146
147 IWL_DEBUG_DEV_RADIO(dev,
148 "ACPI: DSM method evaluated: func=%d, ret=%d\n",
149 func, ret);
150 out:
151 ACPI_FREE(obj);
152 return ret;
153 }
154
155 /*
156 * This function receives a DSM function number, calculates its expected size
157 * according to Intel BIOS spec, and fills in the value in a 32-bit field.
158 * In case the expected size is smaller than 32-bit, padding will be added.
159 */
iwl_acpi_get_dsm(struct iwl_fw_runtime * fwrt,enum iwl_dsm_funcs func,u32 * value)160 int iwl_acpi_get_dsm(struct iwl_fw_runtime *fwrt,
161 enum iwl_dsm_funcs func, u32 *value)
162 {
163 size_t expected_size;
164 u64 tmp;
165 int ret;
166
167 BUILD_BUG_ON(ARRAY_SIZE(acpi_dsm_size) != DSM_FUNC_NUM_FUNCS);
168
169 if (WARN_ON(func >= ARRAY_SIZE(acpi_dsm_size)))
170 return -EINVAL;
171
172 expected_size = acpi_dsm_size[func];
173
174 /* Currently all ACPI DSMs are either 8-bit or 32-bit */
175 if (expected_size != sizeof(u8) && expected_size != sizeof(u32))
176 return -EOPNOTSUPP;
177
178 ret = iwl_acpi_get_dsm_integer(fwrt->dev, ACPI_DSM_REV, func,
179 &iwl_guid, &tmp, expected_size);
180 if (ret)
181 return ret;
182
183 if ((expected_size == sizeof(u8) && tmp != (u8)tmp) ||
184 (expected_size == sizeof(u32) && tmp != (u32)tmp))
185 IWL_DEBUG_RADIO(fwrt,
186 "DSM value overflows the expected size, truncating\n");
187 *value = (u32)tmp;
188
189 return 0;
190 }
191
192 static union acpi_object *
iwl_acpi_get_wifi_pkg_range(struct device * dev,union acpi_object * data,int min_data_size,int max_data_size,int * tbl_rev)193 iwl_acpi_get_wifi_pkg_range(struct device *dev,
194 union acpi_object *data,
195 int min_data_size,
196 int max_data_size,
197 int *tbl_rev)
198 {
199 int i;
200 union acpi_object *wifi_pkg;
201
202 /*
203 * We need at least one entry in the wifi package that
204 * describes the domain, and one more entry, otherwise there's
205 * no point in reading it.
206 */
207 if (WARN_ON_ONCE(min_data_size < 2 || min_data_size > max_data_size))
208 return ERR_PTR(-EINVAL);
209
210 /*
211 * We need at least two packages, one for the revision and one
212 * for the data itself. Also check that the revision is valid
213 * (i.e. it is an integer (each caller has to check by itself
214 * if the returned revision is supported)).
215 */
216 if (data->type != ACPI_TYPE_PACKAGE ||
217 data->package.count < 2 ||
218 data->package.elements[0].type != ACPI_TYPE_INTEGER) {
219 IWL_DEBUG_DEV_RADIO(dev, "Invalid packages structure\n");
220 return ERR_PTR(-EINVAL);
221 }
222
223 *tbl_rev = data->package.elements[0].integer.value;
224
225 /* loop through all the packages to find the one for WiFi */
226 for (i = 1; i < data->package.count; i++) {
227 union acpi_object *domain;
228
229 wifi_pkg = &data->package.elements[i];
230
231 /* skip entries that are not a package with the right size */
232 if (wifi_pkg->type != ACPI_TYPE_PACKAGE ||
233 wifi_pkg->package.count < min_data_size ||
234 wifi_pkg->package.count > max_data_size)
235 continue;
236
237 domain = &wifi_pkg->package.elements[0];
238 if (domain->type == ACPI_TYPE_INTEGER &&
239 domain->integer.value == ACPI_WIFI_DOMAIN)
240 goto found;
241 }
242
243 return ERR_PTR(-ENOENT);
244
245 found:
246 return wifi_pkg;
247 }
248
249 static union acpi_object *
iwl_acpi_get_wifi_pkg(struct device * dev,union acpi_object * data,int data_size,int * tbl_rev)250 iwl_acpi_get_wifi_pkg(struct device *dev,
251 union acpi_object *data,
252 int data_size, int *tbl_rev)
253 {
254 return iwl_acpi_get_wifi_pkg_range(dev, data, data_size, data_size,
255 tbl_rev);
256 }
257
iwl_acpi_get_tas_table(struct iwl_fw_runtime * fwrt,struct iwl_tas_data * tas_data)258 int iwl_acpi_get_tas_table(struct iwl_fw_runtime *fwrt,
259 struct iwl_tas_data *tas_data)
260 {
261 union acpi_object *wifi_pkg, *data;
262 int ret, tbl_rev, i, block_list_size, enabled;
263
264 data = iwl_acpi_get_object(fwrt->dev, ACPI_WTAS_METHOD);
265 if (IS_ERR(data))
266 return PTR_ERR(data);
267
268 /* try to read wtas table revision 1 or revision 0*/
269 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
270 ACPI_WTAS_WIFI_DATA_SIZE,
271 &tbl_rev);
272 if (IS_ERR(wifi_pkg)) {
273 ret = PTR_ERR(wifi_pkg);
274 goto out_free;
275 }
276
277 if (tbl_rev == 1 && wifi_pkg->package.elements[1].type ==
278 ACPI_TYPE_INTEGER) {
279 u32 tas_selection =
280 (u32)wifi_pkg->package.elements[1].integer.value;
281
282 enabled = iwl_parse_tas_selection(fwrt, tas_data,
283 tas_selection);
284
285 } else if (tbl_rev == 0 &&
286 wifi_pkg->package.elements[1].type == ACPI_TYPE_INTEGER) {
287 enabled = !!wifi_pkg->package.elements[1].integer.value;
288 } else {
289 ret = -EINVAL;
290 goto out_free;
291 }
292
293 if (!enabled) {
294 IWL_DEBUG_RADIO(fwrt, "TAS not enabled\n");
295 ret = 0;
296 goto out_free;
297 }
298
299 IWL_DEBUG_RADIO(fwrt, "Reading TAS table revision %d\n", tbl_rev);
300 if (wifi_pkg->package.elements[2].type != ACPI_TYPE_INTEGER ||
301 wifi_pkg->package.elements[2].integer.value >
302 IWL_WTAS_BLACK_LIST_MAX) {
303 IWL_DEBUG_RADIO(fwrt, "TAS invalid array size %llu\n",
304 wifi_pkg->package.elements[2].integer.value);
305 ret = -EINVAL;
306 goto out_free;
307 }
308 block_list_size = wifi_pkg->package.elements[2].integer.value;
309 tas_data->block_list_size = cpu_to_le32(block_list_size);
310
311 IWL_DEBUG_RADIO(fwrt, "TAS array size %u\n", block_list_size);
312
313 for (i = 0; i < block_list_size; i++) {
314 u32 country;
315
316 if (wifi_pkg->package.elements[3 + i].type !=
317 ACPI_TYPE_INTEGER) {
318 IWL_DEBUG_RADIO(fwrt,
319 "TAS invalid array elem %d\n", 3 + i);
320 ret = -EINVAL;
321 goto out_free;
322 }
323
324 country = wifi_pkg->package.elements[3 + i].integer.value;
325 tas_data->block_list_array[i] = cpu_to_le32(country);
326 IWL_DEBUG_RADIO(fwrt, "TAS block list country %d\n", country);
327 }
328
329 ret = 1;
330 out_free:
331 kfree(data);
332 return ret;
333 }
334
iwl_acpi_get_mcc(struct iwl_fw_runtime * fwrt,char * mcc)335 int iwl_acpi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc)
336 {
337 union acpi_object *wifi_pkg, *data;
338 u32 mcc_val;
339 int ret, tbl_rev;
340
341 data = iwl_acpi_get_object(fwrt->dev, ACPI_WRDD_METHOD);
342 if (IS_ERR(data))
343 return PTR_ERR(data);
344
345 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
346 ACPI_WRDD_WIFI_DATA_SIZE,
347 &tbl_rev);
348 if (IS_ERR(wifi_pkg)) {
349 ret = PTR_ERR(wifi_pkg);
350 goto out_free;
351 }
352
353 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
354 tbl_rev != 0) {
355 ret = -EINVAL;
356 goto out_free;
357 }
358
359 mcc_val = wifi_pkg->package.elements[1].integer.value;
360 if (mcc_val != BIOS_MCC_CHINA) {
361 ret = -EINVAL;
362 IWL_DEBUG_RADIO(fwrt, "ACPI WRDD is supported only for CN\n");
363 goto out_free;
364 }
365
366 mcc[0] = (mcc_val >> 8) & 0xff;
367 mcc[1] = mcc_val & 0xff;
368 mcc[2] = '\0';
369
370 ret = 0;
371 out_free:
372 kfree(data);
373 return ret;
374 }
375
iwl_acpi_get_pwr_limit(struct iwl_fw_runtime * fwrt,u64 * dflt_pwr_limit)376 int iwl_acpi_get_pwr_limit(struct iwl_fw_runtime *fwrt, u64 *dflt_pwr_limit)
377 {
378 union acpi_object *data, *wifi_pkg;
379 int tbl_rev, ret = -EINVAL;
380
381 *dflt_pwr_limit = 0;
382 data = iwl_acpi_get_object(fwrt->dev, ACPI_SPLC_METHOD);
383 if (IS_ERR(data))
384 goto out;
385
386 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
387 ACPI_SPLC_WIFI_DATA_SIZE, &tbl_rev);
388 if (IS_ERR(wifi_pkg) || tbl_rev != 0 ||
389 wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER)
390 goto out_free;
391
392 *dflt_pwr_limit = wifi_pkg->package.elements[1].integer.value;
393 ret = 0;
394 out_free:
395 kfree(data);
396 out:
397 return ret;
398 }
399
iwl_acpi_get_eckv(struct iwl_fw_runtime * fwrt,u32 * extl_clk)400 int iwl_acpi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk)
401 {
402 union acpi_object *wifi_pkg, *data;
403 int ret, tbl_rev;
404
405 data = iwl_acpi_get_object(fwrt->dev, ACPI_ECKV_METHOD);
406 if (IS_ERR(data))
407 return PTR_ERR(data);
408
409 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
410 ACPI_ECKV_WIFI_DATA_SIZE,
411 &tbl_rev);
412 if (IS_ERR(wifi_pkg)) {
413 ret = PTR_ERR(wifi_pkg);
414 goto out_free;
415 }
416
417 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
418 tbl_rev != 0) {
419 ret = -EINVAL;
420 goto out_free;
421 }
422
423 *extl_clk = wifi_pkg->package.elements[1].integer.value;
424
425 ret = 0;
426
427 out_free:
428 kfree(data);
429 return ret;
430 }
431
432 static int
iwl_acpi_parse_chains_table(union acpi_object * table,struct iwl_sar_profile_chain * chains,u8 num_chains,u8 num_sub_bands)433 iwl_acpi_parse_chains_table(union acpi_object *table,
434 struct iwl_sar_profile_chain *chains,
435 u8 num_chains, u8 num_sub_bands)
436 {
437 for (u8 chain = 0; chain < num_chains; chain++) {
438 for (u8 subband = 0; subband < BIOS_SAR_MAX_SUB_BANDS_NUM;
439 subband++) {
440 /* if we don't have the values, use the default */
441 if (subband >= num_sub_bands) {
442 chains[chain].subbands[subband] = 0;
443 } else if (table->type != ACPI_TYPE_INTEGER ||
444 table->integer.value > U8_MAX) {
445 return -EINVAL;
446 } else {
447 chains[chain].subbands[subband] =
448 table->integer.value;
449 table++;
450 }
451 }
452 }
453
454 return 0;
455 }
456
iwl_acpi_get_wrds_table(struct iwl_fw_runtime * fwrt)457 int iwl_acpi_get_wrds_table(struct iwl_fw_runtime *fwrt)
458 {
459 union acpi_object *wifi_pkg, *table, *data;
460 int ret, tbl_rev;
461 u32 flags;
462 u8 num_chains, num_sub_bands;
463
464 data = iwl_acpi_get_object(fwrt->dev, ACPI_WRDS_METHOD);
465 if (IS_ERR(data))
466 return PTR_ERR(data);
467
468 /* start by trying to read revision 2 */
469 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
470 ACPI_WRDS_WIFI_DATA_SIZE_REV2,
471 &tbl_rev);
472 if (!IS_ERR(wifi_pkg)) {
473 if (tbl_rev != 2) {
474 ret = -EINVAL;
475 goto out_free;
476 }
477
478 num_chains = ACPI_SAR_NUM_CHAINS_REV2;
479 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV2;
480
481 goto read_table;
482 }
483
484 /* then try revision 1 */
485 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
486 ACPI_WRDS_WIFI_DATA_SIZE_REV1,
487 &tbl_rev);
488 if (!IS_ERR(wifi_pkg)) {
489 if (tbl_rev != 1) {
490 ret = -EINVAL;
491 goto out_free;
492 }
493
494 num_chains = ACPI_SAR_NUM_CHAINS_REV1;
495 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV1;
496
497 goto read_table;
498 }
499
500 /* then finally revision 0 */
501 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
502 ACPI_WRDS_WIFI_DATA_SIZE_REV0,
503 &tbl_rev);
504 if (!IS_ERR(wifi_pkg)) {
505 if (tbl_rev != 0) {
506 ret = -EINVAL;
507 goto out_free;
508 }
509
510 num_chains = ACPI_SAR_NUM_CHAINS_REV0;
511 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV0;
512
513 goto read_table;
514 }
515
516 ret = PTR_ERR(wifi_pkg);
517 goto out_free;
518
519 read_table:
520 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) {
521 ret = -EINVAL;
522 goto out_free;
523 }
524
525 IWL_DEBUG_RADIO(fwrt, "Reading WRDS tbl_rev=%d\n", tbl_rev);
526
527 flags = wifi_pkg->package.elements[1].integer.value;
528 fwrt->reduced_power_flags = flags >> IWL_REDUCE_POWER_FLAGS_POS;
529
530 /* position of the actual table */
531 table = &wifi_pkg->package.elements[2];
532
533 /* The profile from WRDS is officially profile 1, but goes
534 * into sar_profiles[0] (because we don't have a profile 0).
535 */
536 ret = iwl_acpi_parse_chains_table(table, fwrt->sar_profiles[0].chains,
537 num_chains, num_sub_bands);
538 if (!ret && flags & IWL_SAR_ENABLE_MSK)
539 fwrt->sar_profiles[0].enabled = true;
540
541 out_free:
542 kfree(data);
543 return ret;
544 }
545
iwl_acpi_get_ewrd_table(struct iwl_fw_runtime * fwrt)546 int iwl_acpi_get_ewrd_table(struct iwl_fw_runtime *fwrt)
547 {
548 union acpi_object *wifi_pkg, *data;
549 bool enabled;
550 int i, n_profiles, tbl_rev, pos;
551 int ret = 0;
552 u8 num_sub_bands;
553
554 data = iwl_acpi_get_object(fwrt->dev, ACPI_EWRD_METHOD);
555 if (IS_ERR(data))
556 return PTR_ERR(data);
557
558 /* start by trying to read revision 2 */
559 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
560 ACPI_EWRD_WIFI_DATA_SIZE_REV2,
561 &tbl_rev);
562 if (!IS_ERR(wifi_pkg)) {
563 if (tbl_rev != 2) {
564 ret = -EINVAL;
565 goto out_free;
566 }
567
568 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV2;
569
570 goto read_table;
571 }
572
573 /* then try revision 1 */
574 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
575 ACPI_EWRD_WIFI_DATA_SIZE_REV1,
576 &tbl_rev);
577 if (!IS_ERR(wifi_pkg)) {
578 if (tbl_rev != 1) {
579 ret = -EINVAL;
580 goto out_free;
581 }
582
583 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV1;
584
585 goto read_table;
586 }
587
588 /* then finally revision 0 */
589 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
590 ACPI_EWRD_WIFI_DATA_SIZE_REV0,
591 &tbl_rev);
592 if (!IS_ERR(wifi_pkg)) {
593 if (tbl_rev != 0) {
594 ret = -EINVAL;
595 goto out_free;
596 }
597
598 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV0;
599
600 goto read_table;
601 }
602
603 ret = PTR_ERR(wifi_pkg);
604 goto out_free;
605
606 read_table:
607 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
608 wifi_pkg->package.elements[2].type != ACPI_TYPE_INTEGER) {
609 ret = -EINVAL;
610 goto out_free;
611 }
612
613 enabled = !!(wifi_pkg->package.elements[1].integer.value);
614 n_profiles = wifi_pkg->package.elements[2].integer.value;
615
616 /*
617 * Check the validity of n_profiles. The EWRD profiles start
618 * from index 1, so the maximum value allowed here is
619 * ACPI_SAR_PROFILES_NUM - 1.
620 */
621 if (n_profiles >= BIOS_SAR_MAX_PROFILE_NUM) {
622 ret = -EINVAL;
623 goto out_free;
624 }
625
626 /* the tables start at element 3 */
627 pos = 3;
628
629 BUILD_BUG_ON(ACPI_SAR_NUM_CHAINS_REV0 != ACPI_SAR_NUM_CHAINS_REV1);
630 BUILD_BUG_ON(ACPI_SAR_NUM_CHAINS_REV2 != 2 * ACPI_SAR_NUM_CHAINS_REV0);
631
632 /* parse non-cdb chains for all profiles */
633 for (i = 0; i < n_profiles; i++) {
634 union acpi_object *table = &wifi_pkg->package.elements[pos];
635
636 /* The EWRD profiles officially go from 2 to 4, but we
637 * save them in sar_profiles[1-3] (because we don't
638 * have profile 0). So in the array we start from 1.
639 */
640 ret = iwl_acpi_parse_chains_table(table,
641 fwrt->sar_profiles[i + 1].chains,
642 ACPI_SAR_NUM_CHAINS_REV0,
643 num_sub_bands);
644 if (ret < 0)
645 goto out_free;
646
647 /* go to the next table */
648 pos += ACPI_SAR_NUM_CHAINS_REV0 * num_sub_bands;
649 }
650
651 /* non-cdb table revisions */
652 if (tbl_rev < 2)
653 goto set_enabled;
654
655 /* parse cdb chains for all profiles */
656 for (i = 0; i < n_profiles; i++) {
657 struct iwl_sar_profile_chain *chains;
658 union acpi_object *table;
659
660 table = &wifi_pkg->package.elements[pos];
661 chains = &fwrt->sar_profiles[i + 1].chains[ACPI_SAR_NUM_CHAINS_REV0];
662 ret = iwl_acpi_parse_chains_table(table,
663 chains,
664 ACPI_SAR_NUM_CHAINS_REV0,
665 num_sub_bands);
666 if (ret < 0)
667 goto out_free;
668
669 /* go to the next table */
670 pos += ACPI_SAR_NUM_CHAINS_REV0 * num_sub_bands;
671 }
672
673 set_enabled:
674 for (i = 0; i < n_profiles; i++)
675 fwrt->sar_profiles[i + 1].enabled = enabled;
676
677 out_free:
678 kfree(data);
679 return ret;
680 }
681
iwl_acpi_get_wgds_table(struct iwl_fw_runtime * fwrt)682 int iwl_acpi_get_wgds_table(struct iwl_fw_runtime *fwrt)
683 {
684 union acpi_object *wifi_pkg, *data;
685 int i, j, k, ret, tbl_rev;
686 u8 num_bands, num_profiles;
687 static const struct {
688 u8 revisions;
689 u8 bands;
690 u8 profiles;
691 u8 min_profiles;
692 } rev_data[] = {
693 {
694 .revisions = BIT(3),
695 .bands = ACPI_GEO_NUM_BANDS_REV2,
696 .profiles = ACPI_NUM_GEO_PROFILES_REV3,
697 .min_profiles = BIOS_GEO_MIN_PROFILE_NUM,
698 },
699 {
700 .revisions = BIT(2),
701 .bands = ACPI_GEO_NUM_BANDS_REV2,
702 .profiles = ACPI_NUM_GEO_PROFILES,
703 },
704 {
705 .revisions = BIT(0) | BIT(1),
706 .bands = ACPI_GEO_NUM_BANDS_REV0,
707 .profiles = ACPI_NUM_GEO_PROFILES,
708 },
709 };
710 int idx;
711 /* start from one to skip the domain */
712 int entry_idx = 1;
713
714 BUILD_BUG_ON(ACPI_NUM_GEO_PROFILES_REV3 != IWL_NUM_GEO_PROFILES_V3);
715 BUILD_BUG_ON(ACPI_NUM_GEO_PROFILES != IWL_NUM_GEO_PROFILES);
716
717 data = iwl_acpi_get_object(fwrt->dev, ACPI_WGDS_METHOD);
718 if (IS_ERR(data))
719 return PTR_ERR(data);
720
721 /* read the highest revision we understand first */
722 for (idx = 0; idx < ARRAY_SIZE(rev_data); idx++) {
723 /* min_profiles != 0 requires num_profiles header */
724 u32 hdr_size = 1 + !!rev_data[idx].min_profiles;
725 u32 profile_size = ACPI_GEO_PER_CHAIN_SIZE *
726 rev_data[idx].bands;
727 u32 max_size = hdr_size + profile_size * rev_data[idx].profiles;
728 u32 min_size;
729
730 if (!rev_data[idx].min_profiles)
731 min_size = max_size;
732 else
733 min_size = hdr_size +
734 profile_size * rev_data[idx].min_profiles;
735
736 wifi_pkg = iwl_acpi_get_wifi_pkg_range(fwrt->dev, data,
737 min_size, max_size,
738 &tbl_rev);
739 if (!IS_ERR(wifi_pkg)) {
740 if (!(BIT(tbl_rev) & rev_data[idx].revisions))
741 continue;
742
743 num_bands = rev_data[idx].bands;
744 num_profiles = rev_data[idx].profiles;
745
746 if (rev_data[idx].min_profiles) {
747 /* read header that says # of profiles */
748 union acpi_object *entry;
749
750 entry = &wifi_pkg->package.elements[entry_idx];
751 entry_idx++;
752 if (entry->type != ACPI_TYPE_INTEGER ||
753 entry->integer.value > num_profiles ||
754 entry->integer.value <
755 rev_data[idx].min_profiles) {
756 ret = -EINVAL;
757 goto out_free;
758 }
759
760 /*
761 * Check to see if we received package count
762 * same as max # of profiles
763 */
764 if (wifi_pkg->package.count !=
765 hdr_size + profile_size * num_profiles) {
766 ret = -EINVAL;
767 goto out_free;
768 }
769
770 /* Number of valid profiles */
771 num_profiles = entry->integer.value;
772 }
773 goto read_table;
774 }
775 }
776
777 if (idx < ARRAY_SIZE(rev_data))
778 ret = PTR_ERR(wifi_pkg);
779 else
780 ret = -ENOENT;
781 goto out_free;
782
783 read_table:
784 fwrt->geo_rev = tbl_rev;
785 for (i = 0; i < num_profiles; i++) {
786 for (j = 0; j < BIOS_GEO_MAX_NUM_BANDS; j++) {
787 union acpi_object *entry;
788
789 /*
790 * num_bands is either 2 or 3, if it's only 2 then
791 * fill the third band (6 GHz) with the values from
792 * 5 GHz (second band)
793 */
794 if (j >= num_bands) {
795 fwrt->geo_profiles[i].bands[j].max =
796 fwrt->geo_profiles[i].bands[1].max;
797 } else {
798 entry = &wifi_pkg->package.elements[entry_idx];
799 entry_idx++;
800 if (entry->type != ACPI_TYPE_INTEGER ||
801 entry->integer.value > U8_MAX) {
802 ret = -EINVAL;
803 goto out_free;
804 }
805
806 fwrt->geo_profiles[i].bands[j].max =
807 entry->integer.value;
808 }
809
810 for (k = 0; k < BIOS_GEO_NUM_CHAINS; k++) {
811 /* same here as above */
812 if (j >= num_bands) {
813 fwrt->geo_profiles[i].bands[j].chains[k] =
814 fwrt->geo_profiles[i].bands[1].chains[k];
815 } else {
816 entry = &wifi_pkg->package.elements[entry_idx];
817 entry_idx++;
818 if (entry->type != ACPI_TYPE_INTEGER ||
819 entry->integer.value > U8_MAX) {
820 ret = -EINVAL;
821 goto out_free;
822 }
823
824 fwrt->geo_profiles[i].bands[j].chains[k] =
825 entry->integer.value;
826 }
827 }
828 }
829 }
830
831 fwrt->geo_num_profiles = num_profiles;
832 fwrt->geo_enabled = true;
833 ret = 0;
834 out_free:
835 kfree(data);
836 return ret;
837 }
838
iwl_acpi_get_ppag_table(struct iwl_fw_runtime * fwrt)839 int iwl_acpi_get_ppag_table(struct iwl_fw_runtime *fwrt)
840 {
841 union acpi_object *wifi_pkg, *data, *flags;
842 int i, j, ret, tbl_rev, num_sub_bands = 0;
843 int idx = 2;
844
845 data = iwl_acpi_get_object(fwrt->dev, ACPI_PPAG_METHOD);
846 if (IS_ERR(data))
847 return PTR_ERR(data);
848
849 /* try to read ppag table rev 3, 2 or 1 (all have the same data size) */
850 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
851 ACPI_PPAG_WIFI_DATA_SIZE_V2, &tbl_rev);
852
853 if (!IS_ERR(wifi_pkg)) {
854 if (tbl_rev >= 1 && tbl_rev <= 3) {
855 num_sub_bands = IWL_NUM_SUB_BANDS_V2;
856 IWL_DEBUG_RADIO(fwrt,
857 "Reading PPAG table (tbl_rev=%d)\n",
858 tbl_rev);
859 goto read_table;
860 } else {
861 ret = -EINVAL;
862 goto out_free;
863 }
864 }
865
866 /* try to read ppag table revision 0 */
867 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
868 ACPI_PPAG_WIFI_DATA_SIZE_V1, &tbl_rev);
869
870 if (!IS_ERR(wifi_pkg)) {
871 if (tbl_rev != 0) {
872 ret = -EINVAL;
873 goto out_free;
874 }
875 num_sub_bands = IWL_NUM_SUB_BANDS_V1;
876 IWL_DEBUG_RADIO(fwrt, "Reading PPAG table v1 (tbl_rev=0)\n");
877 goto read_table;
878 }
879
880 ret = PTR_ERR(wifi_pkg);
881 goto out_free;
882
883 read_table:
884 fwrt->ppag_ver = tbl_rev;
885 flags = &wifi_pkg->package.elements[1];
886
887 if (flags->type != ACPI_TYPE_INTEGER) {
888 ret = -EINVAL;
889 goto out_free;
890 }
891
892 fwrt->ppag_flags = iwl_bios_get_ppag_flags(flags->integer.value,
893 fwrt->ppag_ver);
894
895 /*
896 * read, verify gain values and save them into the PPAG table.
897 * first sub-band (j=0) corresponds to Low-Band (2.4GHz), and the
898 * following sub-bands to High-Band (5GHz).
899 */
900 for (i = 0; i < IWL_NUM_CHAIN_LIMITS; i++) {
901 for (j = 0; j < num_sub_bands; j++) {
902 union acpi_object *ent;
903
904 ent = &wifi_pkg->package.elements[idx++];
905 if (ent->type != ACPI_TYPE_INTEGER) {
906 ret = -EINVAL;
907 goto out_free;
908 }
909
910 fwrt->ppag_chains[i].subbands[j] = ent->integer.value;
911 }
912 }
913
914 ret = 0;
915
916 out_free:
917 kfree(data);
918 return ret;
919 }
920
iwl_acpi_get_phy_filters(struct iwl_fw_runtime * fwrt,struct iwl_phy_specific_cfg * filters)921 void iwl_acpi_get_phy_filters(struct iwl_fw_runtime *fwrt,
922 struct iwl_phy_specific_cfg *filters)
923 {
924 struct iwl_phy_specific_cfg tmp = {};
925 union acpi_object *wifi_pkg, *data;
926 int tbl_rev, i;
927
928 data = iwl_acpi_get_object(fwrt->dev, ACPI_WPFC_METHOD);
929 if (IS_ERR(data))
930 return;
931
932 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
933 ACPI_WPFC_WIFI_DATA_SIZE,
934 &tbl_rev);
935 if (IS_ERR(wifi_pkg))
936 goto out_free;
937
938 if (tbl_rev != 0)
939 goto out_free;
940
941 BUILD_BUG_ON(ARRAY_SIZE(filters->filter_cfg_chains) !=
942 ACPI_WPFC_WIFI_DATA_SIZE - 1);
943
944 for (i = 0; i < ARRAY_SIZE(filters->filter_cfg_chains); i++) {
945 if (wifi_pkg->package.elements[i + 1].type != ACPI_TYPE_INTEGER)
946 goto out_free;
947 tmp.filter_cfg_chains[i] =
948 cpu_to_le32(wifi_pkg->package.elements[i + 1].integer.value);
949 }
950
951 IWL_DEBUG_RADIO(fwrt, "Loaded WPFC filter config from ACPI\n");
952 *filters = tmp;
953 out_free:
954 kfree(data);
955 }
956 IWL_EXPORT_SYMBOL(iwl_acpi_get_phy_filters);
957
iwl_acpi_get_guid_lock_status(struct iwl_fw_runtime * fwrt)958 void iwl_acpi_get_guid_lock_status(struct iwl_fw_runtime *fwrt)
959 {
960 union acpi_object *wifi_pkg, *data;
961 int tbl_rev;
962
963 data = iwl_acpi_get_object(fwrt->dev, ACPI_GLAI_METHOD);
964 if (IS_ERR(data))
965 return;
966
967 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
968 ACPI_GLAI_WIFI_DATA_SIZE,
969 &tbl_rev);
970 if (IS_ERR(wifi_pkg))
971 goto out_free;
972
973 if (tbl_rev != 0) {
974 IWL_DEBUG_RADIO(fwrt, "Invalid GLAI revision: %d\n", tbl_rev);
975 goto out_free;
976 }
977
978 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER ||
979 wifi_pkg->package.elements[1].integer.value > ACPI_GLAI_MAX_STATUS)
980 goto out_free;
981
982 fwrt->uefi_tables_lock_status =
983 wifi_pkg->package.elements[1].integer.value;
984
985 IWL_DEBUG_RADIO(fwrt,
986 "Loaded UEFI WIFI GUID lock status: %d from ACPI\n",
987 fwrt->uefi_tables_lock_status);
988 out_free:
989 kfree(data);
990 }
991 IWL_EXPORT_SYMBOL(iwl_acpi_get_guid_lock_status);
992
iwl_acpi_get_wbem(struct iwl_fw_runtime * fwrt,u32 * value)993 int iwl_acpi_get_wbem(struct iwl_fw_runtime *fwrt, u32 *value)
994 {
995 union acpi_object *wifi_pkg, *data;
996 int ret = -ENOENT;
997 int tbl_rev;
998
999 data = iwl_acpi_get_object(fwrt->dev, ACPI_WBEM_METHOD);
1000 if (IS_ERR(data))
1001 return ret;
1002
1003 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data,
1004 ACPI_WBEM_WIFI_DATA_SIZE,
1005 &tbl_rev);
1006 if (IS_ERR(wifi_pkg))
1007 goto out_free;
1008
1009 if (tbl_rev != IWL_ACPI_WBEM_REVISION) {
1010 IWL_DEBUG_RADIO(fwrt, "Unsupported ACPI WBEM revision:%d\n",
1011 tbl_rev);
1012 goto out_free;
1013 }
1014
1015 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER)
1016 goto out_free;
1017
1018 *value = wifi_pkg->package.elements[1].integer.value &
1019 IWL_ACPI_WBEM_REV0_MASK;
1020 IWL_DEBUG_RADIO(fwrt, "Loaded WBEM config from ACPI\n");
1021 ret = 0;
1022 out_free:
1023 kfree(data);
1024 return ret;
1025 }
1026