nvm.c

  1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
  2/*
  3 * Copyright (C) 2012-2014, 2018-2019, 2021-2025 Intel Corporation
  4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
  5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
  6 */
  7#include <linux/firmware.h>
  8#include <linux/rtnetlink.h>
  9#include "iwl-trans.h"
 10#include "iwl-csr.h"
 11#include "mvm.h"
 12#include "iwl-nvm-utils.h"
 13#include "iwl-nvm-parse.h"
 14#include "iwl-prph.h"
 15#include "fw/acpi.h"
 16
 17/* Default NVM size to read */
 18#define IWL_NVM_DEFAULT_CHUNK_SIZE (2 * 1024)
 19
 20#define NVM_WRITE_OPCODE 1
 21#define NVM_READ_OPCODE 0
 22
 23/* load nvm chunk response */
 24enum {
 25	READ_NVM_CHUNK_SUCCEED = 0,
 26	READ_NVM_CHUNK_NOT_VALID_ADDRESS = 1
 27};
 28
 29/*
 30 * prepare the NVM host command w/ the pointers to the nvm buffer
 31 * and send it to fw
 32 */
 33static int iwl_nvm_write_chunk(struct iwl_mvm *mvm, u16 section,
 34			       u16 offset, u16 length, const u8 *data)
 35{
 36	struct iwl_nvm_access_cmd nvm_access_cmd = {
 37		.offset = cpu_to_le16(offset),
 38		.length = cpu_to_le16(length),
 39		.type = cpu_to_le16(section),
 40		.op_code = NVM_WRITE_OPCODE,
 41	};
 42	struct iwl_host_cmd cmd = {
 43		.id = NVM_ACCESS_CMD,
 44		.len = { sizeof(struct iwl_nvm_access_cmd), length },
 45		.flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 46		.data = { &nvm_access_cmd, data },
 47		/* data may come from vmalloc, so use _DUP */
 48		.dataflags = { 0, IWL_HCMD_DFL_DUP },
 49	};
 50	struct iwl_rx_packet *pkt;
 51	struct iwl_nvm_access_resp *nvm_resp;
 52	int ret;
 53
 54	ret = iwl_mvm_send_cmd(mvm, &cmd);
 55	if (ret)
 56		return ret;
 57
 58	pkt = cmd.resp_pkt;
 59	/* Extract & check NVM write response */
 60	nvm_resp = (void *)pkt->data;
 61	if (le16_to_cpu(nvm_resp->status) != READ_NVM_CHUNK_SUCCEED) {
 62		IWL_ERR(mvm,
 63			"NVM access write command failed for section %u (status = 0x%x)\n",
 64			section, le16_to_cpu(nvm_resp->status));
 65		ret = -EIO;
 66	}
 67
 68	iwl_free_resp(&cmd);
 69	return ret;
 70}
 71
 72static int iwl_nvm_read_chunk(struct iwl_mvm *mvm, u16 section,
 73			      u16 offset, u16 length, u8 *data)
 74{
 75	struct iwl_nvm_access_cmd nvm_access_cmd = {
 76		.offset = cpu_to_le16(offset),
 77		.length = cpu_to_le16(length),
 78		.type = cpu_to_le16(section),
 79		.op_code = NVM_READ_OPCODE,
 80	};
 81	struct iwl_nvm_access_resp *nvm_resp;
 82	struct iwl_rx_packet *pkt;
 83	struct iwl_host_cmd cmd = {
 84		.id = NVM_ACCESS_CMD,
 85		.flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
 86		.data = { &nvm_access_cmd, },
 87	};
 88	int ret, bytes_read, offset_read;
 89	u8 *resp_data;
 90
 91	cmd.len[0] = sizeof(struct iwl_nvm_access_cmd);
 92
 93	ret = iwl_mvm_send_cmd(mvm, &cmd);
 94	if (ret)
 95		return ret;
 96
 97	pkt = cmd.resp_pkt;
 98
 99	/* Extract NVM response */
100	nvm_resp = (void *)pkt->data;
101	ret = le16_to_cpu(nvm_resp->status);
102	bytes_read = le16_to_cpu(nvm_resp->length);
103	offset_read = le16_to_cpu(nvm_resp->offset);
104	resp_data = nvm_resp->data;
105	if (ret) {
106		if ((offset != 0) &&
107		    (ret == READ_NVM_CHUNK_NOT_VALID_ADDRESS)) {
108			/*
109			 * meaning of NOT_VALID_ADDRESS:
110			 * driver try to read chunk from address that is
111			 * multiple of 2K and got an error since addr is empty.
112			 * meaning of (offset != 0): driver already
113			 * read valid data from another chunk so this case
114			 * is not an error.
115			 */
116			IWL_DEBUG_EEPROM(mvm->trans->dev,
117					 "NVM access command failed on offset 0x%x since that section size is multiple 2K\n",
118					 offset);
119			ret = 0;
120		} else {
121			IWL_DEBUG_EEPROM(mvm->trans->dev,
122					 "NVM access command failed with status %d (device: %s)\n",
123					 ret, mvm->trans->info.name);
124			ret = -ENODATA;
125		}
126		goto exit;
127	}
128
129	if (offset_read != offset) {
130		IWL_ERR(mvm, "NVM ACCESS response with invalid offset %d\n",
131			offset_read);
132		ret = -EINVAL;
133		goto exit;
134	}
135
136	/* Write data to NVM */
137	memcpy(data + offset, resp_data, bytes_read);
138	ret = bytes_read;
139
140exit:
141	iwl_free_resp(&cmd);
142	return ret;
143}
144
145static int iwl_nvm_write_section(struct iwl_mvm *mvm, u16 section,
146				 const u8 *data, u16 length)
147{
148	int offset = 0;
149
150	/* copy data in chunks of 2k (and remainder if any) */
151
152	while (offset < length) {
153		int chunk_size, ret;
154
155		chunk_size = min(IWL_NVM_DEFAULT_CHUNK_SIZE,
156				 length - offset);
157
158		ret = iwl_nvm_write_chunk(mvm, section, offset,
159					  chunk_size, data + offset);
160		if (ret < 0)
161			return ret;
162
163		offset += chunk_size;
164	}
165
166	return 0;
167}
168
169/*
170 * Reads an NVM section completely.
171 * NICs prior to 7000 family doesn't have a real NVM, but just read
172 * section 0 which is the EEPROM. Because the EEPROM reading is unlimited
173 * by uCode, we need to manually check in this case that we don't
174 * overflow and try to read more than the EEPROM size.
175 * For 7000 family NICs, we supply the maximal size we can read, and
176 * the uCode fills the response with as much data as we can,
177 * without overflowing, so no check is needed.
178 */
179static int iwl_nvm_read_section(struct iwl_mvm *mvm, u16 section,
180				u8 *data, u32 size_read)
181{
182	u16 length, offset = 0;
183	int ret;
184
185	/* Set nvm section read length */
186	length = IWL_NVM_DEFAULT_CHUNK_SIZE;
187
188	ret = length;
189
190	/* Read the NVM until exhausted (reading less than requested) */
191	while (ret == length) {
192		/* Check no memory assumptions fail and cause an overflow */
193		if ((size_read + offset + length) >
194		    mvm->trans->mac_cfg->base->eeprom_size) {
195			IWL_ERR(mvm, "EEPROM size is too small for NVM\n");
196			return -ENOBUFS;
197		}
198
199		ret = iwl_nvm_read_chunk(mvm, section, offset, length, data);
200		if (ret < 0) {
201			IWL_DEBUG_EEPROM(mvm->trans->dev,
202					 "Cannot read NVM from section %d offset %d, length %d\n",
203					 section, offset, length);
204			return ret;
205		}
206		offset += ret;
207	}
208
209	iwl_nvm_fixups(mvm->trans->info.hw_id, section, data, offset);
210
211	IWL_DEBUG_EEPROM(mvm->trans->dev,
212			 "NVM section %d read completed\n", section);
213	return offset;
214}
215
216static struct iwl_nvm_data *
217iwl_parse_nvm_sections(struct iwl_mvm *mvm)
218{
219	struct iwl_nvm_section *sections = mvm->nvm_sections;
220	const __be16 *hw;
221	const __le16 *sw, *calib, *regulatory, *mac_override, *phy_sku;
222	u8 tx_ant = mvm->fw->valid_tx_ant;
223	u8 rx_ant = mvm->fw->valid_rx_ant;
224	int regulatory_type;
225
226	/* Checking for required sections */
227	if (mvm->trans->cfg->nvm_type == IWL_NVM) {
228		if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
229		    !mvm->nvm_sections[mvm->trans->mac_cfg->base->nvm_hw_section_num].data) {
230			IWL_ERR(mvm, "Can't parse empty OTP/NVM sections\n");
231			return NULL;
232		}
233	} else {
234		if (mvm->trans->cfg->nvm_type == IWL_NVM_SDP)
235			regulatory_type = NVM_SECTION_TYPE_REGULATORY_SDP;
236		else
237			regulatory_type = NVM_SECTION_TYPE_REGULATORY;
238
239		/* SW and REGULATORY sections are mandatory */
240		if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
241		    !mvm->nvm_sections[regulatory_type].data) {
242			IWL_ERR(mvm,
243				"Can't parse empty family 8000 OTP/NVM sections\n");
244			return NULL;
245		}
246		/* MAC_OVERRIDE or at least HW section must exist */
247		if (!mvm->nvm_sections[mvm->trans->mac_cfg->base->nvm_hw_section_num].data &&
248		    !mvm->nvm_sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data) {
249			IWL_ERR(mvm,
250				"Can't parse mac_address, empty sections\n");
251			return NULL;
252		}
253
254		/* PHY_SKU section is mandatory in B0 */
255		if (mvm->trans->cfg->nvm_type == IWL_NVM_EXT &&
256		    !mvm->nvm_sections[NVM_SECTION_TYPE_PHY_SKU].data) {
257			IWL_ERR(mvm,
258				"Can't parse phy_sku in B0, empty sections\n");
259			return NULL;
260		}
261	}
262
263	hw = (const __be16 *)sections[mvm->trans->mac_cfg->base->nvm_hw_section_num].data;
264	sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
265	calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
266	mac_override =
267		(const __le16 *)sections[NVM_SECTION_TYPE_MAC_OVERRIDE].data;
268	phy_sku = (const __le16 *)sections[NVM_SECTION_TYPE_PHY_SKU].data;
269
270	regulatory = mvm->trans->cfg->nvm_type == IWL_NVM_SDP ?
271		(const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY_SDP].data :
272		(const __le16 *)sections[NVM_SECTION_TYPE_REGULATORY].data;
273
274	if (mvm->set_tx_ant)
275		tx_ant &= mvm->set_tx_ant;
276
277	if (mvm->set_rx_ant)
278		rx_ant &= mvm->set_rx_ant;
279
280	return iwl_parse_nvm_data(mvm->trans, mvm->cfg, mvm->fw, hw, sw, calib,
281				  regulatory, mac_override, phy_sku,
282				  tx_ant, rx_ant);
283}
284
285/* Loads the NVM data stored in mvm->nvm_sections into the NIC */
286int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm)
287{
288	int i, ret = 0;
289	struct iwl_nvm_section *sections = mvm->nvm_sections;
290
291	IWL_DEBUG_EEPROM(mvm->trans->dev, "'Write to NVM\n");
292
293	for (i = 0; i < ARRAY_SIZE(mvm->nvm_sections); i++) {
294		if (!mvm->nvm_sections[i].data || !mvm->nvm_sections[i].length)
295			continue;
296		ret = iwl_nvm_write_section(mvm, i, sections[i].data,
297					    sections[i].length);
298		if (ret < 0) {
299			IWL_ERR(mvm, "iwl_mvm_send_cmd failed: %d\n", ret);
300			break;
301		}
302	}
303	return ret;
304}
305
306int iwl_nvm_init(struct iwl_mvm *mvm)
307{
308	int ret, section;
309	u32 size_read = 0;
310	u8 *nvm_buffer, *temp;
311
312	if (WARN_ON_ONCE(mvm->trans->mac_cfg->base->nvm_hw_section_num >= NVM_MAX_NUM_SECTIONS))
313		return -EINVAL;
314
315	/* load NVM values from nic */
316	/* Read From FW NVM */
317	IWL_DEBUG_EEPROM(mvm->trans->dev, "Read from NVM\n");
318
319	nvm_buffer = kmalloc(mvm->trans->mac_cfg->base->eeprom_size,
320			     GFP_KERNEL);
321	if (!nvm_buffer)
322		return -ENOMEM;
323	for (section = 0; section < NVM_MAX_NUM_SECTIONS; section++) {
324		/* we override the constness for initial read */
325		ret = iwl_nvm_read_section(mvm, section, nvm_buffer,
326					   size_read);
327		if (ret == -ENODATA) {
328			ret = 0;
329			continue;
330		}
331		if (ret < 0)
332			break;
333		size_read += ret;
334		temp = kmemdup(nvm_buffer, ret, GFP_KERNEL);
335		if (!temp) {
336			ret = -ENOMEM;
337			break;
338		}
339
340		iwl_nvm_fixups(mvm->trans->info.hw_id, section, temp, ret);
341
342		mvm->nvm_sections[section].data = temp;
343		mvm->nvm_sections[section].length = ret;
344
345#ifdef CONFIG_IWLWIFI_DEBUGFS
346		switch (section) {
347		case NVM_SECTION_TYPE_SW:
348			mvm->nvm_sw_blob.data = temp;
349			mvm->nvm_sw_blob.size  = ret;
350			break;
351		case NVM_SECTION_TYPE_CALIBRATION:
352			mvm->nvm_calib_blob.data = temp;
353			mvm->nvm_calib_blob.size  = ret;
354			break;
355		case NVM_SECTION_TYPE_PRODUCTION:
356			mvm->nvm_prod_blob.data = temp;
357			mvm->nvm_prod_blob.size  = ret;
358			break;
359		case NVM_SECTION_TYPE_PHY_SKU:
360			mvm->nvm_phy_sku_blob.data = temp;
361			mvm->nvm_phy_sku_blob.size  = ret;
362			break;
363		case NVM_SECTION_TYPE_REGULATORY_SDP:
364		case NVM_SECTION_TYPE_REGULATORY:
365			mvm->nvm_reg_blob.data = temp;
366			mvm->nvm_reg_blob.size  = ret;
367			break;
368		default:
369			if (section == mvm->trans->mac_cfg->base->nvm_hw_section_num) {
370				mvm->nvm_hw_blob.data = temp;
371				mvm->nvm_hw_blob.size = ret;
372				break;
373			}
374		}
375#endif
376	}
377	if (!size_read)
378		IWL_ERR(mvm, "OTP is blank\n");
379	kfree(nvm_buffer);
380
381	/* Only if PNVM selected in the mod param - load external NVM  */
382	if (mvm->nvm_file_name) {
383		/* read External NVM file from the mod param */
384		ret = iwl_read_external_nvm(mvm->trans, mvm->nvm_file_name,
385					    mvm->nvm_sections);
386		if (ret)
387			return ret;
388	}
389
390	/* parse the relevant nvm sections */
391	mvm->nvm_data = iwl_parse_nvm_sections(mvm);
392	if (!mvm->nvm_data)
393		return -ENODATA;
394	IWL_DEBUG_EEPROM(mvm->trans->dev, "nvm version = %x\n",
395			 mvm->nvm_data->nvm_version);
396
397	return ret < 0 ? ret : 0;
398}
399
400struct iwl_mcc_update_resp_v8 *
401iwl_mvm_update_mcc(struct iwl_mvm *mvm, const char *alpha2,
402		   enum iwl_mcc_source src_id)
403{
404	struct iwl_mcc_update_cmd mcc_update_cmd = {
405		.mcc = cpu_to_le16(alpha2[0] << 8 | alpha2[1]),
406		.source_id = (u8)src_id,
407	};
408	struct iwl_mcc_update_resp_v8 *resp_cp;
409	struct iwl_rx_packet *pkt;
410	struct iwl_host_cmd cmd = {
411		.id = MCC_UPDATE_CMD,
412		.flags = CMD_WANT_SKB | CMD_SEND_IN_RFKILL,
413		.data = { &mcc_update_cmd },
414	};
415
416	int ret, resp_ver;
417	u32 status;
418	int resp_len, n_channels;
419	u16 mcc;
420
421	if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
422		return ERR_PTR(-EOPNOTSUPP);
423
424	cmd.len[0] = sizeof(struct iwl_mcc_update_cmd);
425
426	IWL_DEBUG_LAR(mvm, "send MCC update to FW with '%c%c' src = %d\n",
427		      alpha2[0], alpha2[1], src_id);
428
429	ret = iwl_mvm_send_cmd(mvm, &cmd);
430	if (ret)
431		return ERR_PTR(ret);
432
433	pkt = cmd.resp_pkt;
434
435	resp_ver = iwl_fw_lookup_notif_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP,
436					   MCC_UPDATE_CMD, 0);
437
438	/* Extract MCC response */
439	if (resp_ver >= 8) {
440		struct iwl_mcc_update_resp_v8 *mcc_resp_v8 = (void *)pkt->data;
441
442		n_channels =  __le32_to_cpu(mcc_resp_v8->n_channels);
443		if (iwl_rx_packet_payload_len(pkt) !=
444		    struct_size(mcc_resp_v8, channels, n_channels)) {
445			resp_cp = ERR_PTR(-EINVAL);
446			goto exit;
447		}
448		resp_len = struct_size(resp_cp, channels, n_channels);
449		resp_cp = kzalloc(resp_len, GFP_KERNEL);
450		if (!resp_cp) {
451			resp_cp = ERR_PTR(-ENOMEM);
452			goto exit;
453		}
454		resp_cp->status = mcc_resp_v8->status;
455		resp_cp->mcc = mcc_resp_v8->mcc;
456		resp_cp->cap = mcc_resp_v8->cap;
457		resp_cp->source_id = mcc_resp_v8->source_id;
458		resp_cp->time = mcc_resp_v8->time;
459		resp_cp->geo_info = mcc_resp_v8->geo_info;
460		resp_cp->n_channels = mcc_resp_v8->n_channels;
461		memcpy(resp_cp->channels, mcc_resp_v8->channels,
462		       n_channels * sizeof(__le32));
463	} else if (fw_has_capa(&mvm->fw->ucode_capa,
464			       IWL_UCODE_TLV_CAPA_MCC_UPDATE_11AX_SUPPORT)) {
465		struct iwl_mcc_update_resp_v4 *mcc_resp_v4 = (void *)pkt->data;
466
467		n_channels =  __le32_to_cpu(mcc_resp_v4->n_channels);
468		if (iwl_rx_packet_payload_len(pkt) !=
469		    struct_size(mcc_resp_v4, channels, n_channels)) {
470			resp_cp = ERR_PTR(-EINVAL);
471			goto exit;
472		}
473		resp_len = struct_size(resp_cp, channels, n_channels);
474		resp_cp = kzalloc(resp_len, GFP_KERNEL);
475		if (!resp_cp) {
476			resp_cp = ERR_PTR(-ENOMEM);
477			goto exit;
478		}
479
480		resp_cp->status = mcc_resp_v4->status;
481		resp_cp->mcc = mcc_resp_v4->mcc;
482		resp_cp->cap = cpu_to_le32(le16_to_cpu(mcc_resp_v4->cap));
483		resp_cp->source_id = mcc_resp_v4->source_id;
484		resp_cp->time = mcc_resp_v4->time;
485		resp_cp->geo_info = mcc_resp_v4->geo_info;
486		resp_cp->n_channels = mcc_resp_v4->n_channels;
487		memcpy(resp_cp->channels, mcc_resp_v4->channels,
488		       n_channels * sizeof(__le32));
489	} else {
490		struct iwl_mcc_update_resp_v3 *mcc_resp_v3 = (void *)pkt->data;
491
492		n_channels =  __le32_to_cpu(mcc_resp_v3->n_channels);
493		if (iwl_rx_packet_payload_len(pkt) !=
494		    struct_size(mcc_resp_v3, channels, n_channels)) {
495			resp_cp = ERR_PTR(-EINVAL);
496			goto exit;
497		}
498		resp_len = struct_size(resp_cp, channels, n_channels);
499		resp_cp = kzalloc(resp_len, GFP_KERNEL);
500		if (!resp_cp) {
501			resp_cp = ERR_PTR(-ENOMEM);
502			goto exit;
503		}
504
505		resp_cp->status = mcc_resp_v3->status;
506		resp_cp->mcc = mcc_resp_v3->mcc;
507		resp_cp->cap = cpu_to_le32(mcc_resp_v3->cap);
508		resp_cp->source_id = mcc_resp_v3->source_id;
509		resp_cp->time = mcc_resp_v3->time;
510		resp_cp->geo_info = mcc_resp_v3->geo_info;
511		resp_cp->n_channels = mcc_resp_v3->n_channels;
512		memcpy(resp_cp->channels, mcc_resp_v3->channels,
513		       n_channels * sizeof(__le32));
514	}
515
516	status = le32_to_cpu(resp_cp->status);
517
518	mcc = le16_to_cpu(resp_cp->mcc);
519
520	/* W/A for a FW/NVM issue - returns 0x00 for the world domain */
521	if (mcc == 0) {
522		mcc = 0x3030;  /* "00" - world */
523		resp_cp->mcc = cpu_to_le16(mcc);
524	}
525
526	IWL_DEBUG_LAR(mvm,
527		      "MCC response status: 0x%x. new MCC: 0x%x ('%c%c') n_chans: %d\n",
528		      status, mcc, mcc >> 8, mcc & 0xff, n_channels);
529
530exit:
531	iwl_free_resp(&cmd);
532	return resp_cp;
533}
534
535int iwl_mvm_init_mcc(struct iwl_mvm *mvm)
536{
537	bool tlv_lar;
538	bool nvm_lar;
539	int retval;
540	struct ieee80211_regdomain *regd;
541	char mcc[3];
542
543	if (mvm->trans->cfg->nvm_type == IWL_NVM_EXT) {
544		tlv_lar = fw_has_capa(&mvm->fw->ucode_capa,
545				      IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
546		nvm_lar = mvm->nvm_data->lar_enabled;
547		if (tlv_lar != nvm_lar)
548			IWL_INFO(mvm,
549				 "Conflict between TLV & NVM regarding enabling LAR (TLV = %s NVM =%s)\n",
550				 tlv_lar ? "enabled" : "disabled",
551				 nvm_lar ? "enabled" : "disabled");
552	}
553
554	if (!iwl_mvm_is_lar_supported(mvm))
555		return 0;
556
557	/*
558	 * try to replay the last set MCC to FW. If it doesn't exist,
559	 * queue an update to cfg80211 to retrieve the default alpha2 from FW.
560	 */
561	retval = iwl_mvm_init_fw_regd(mvm, true);
562	if (retval != -ENOENT)
563		return retval;
564
565	/*
566	 * Driver regulatory hint for initial update, this also informs the
567	 * firmware we support wifi location updates.
568	 * Disallow scans that might crash the FW while the LAR regdomain
569	 * is not set.
570	 */
571	mvm->lar_regdom_set = false;
572
573	regd = iwl_mvm_get_current_regdomain(mvm, NULL);
574	if (IS_ERR_OR_NULL(regd))
575		return -EIO;
576
577	if (iwl_mvm_is_wifi_mcc_supported(mvm) &&
578	    !iwl_bios_get_mcc(&mvm->fwrt, mcc)) {
579		kfree(regd);
580		regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc,
581					     MCC_SOURCE_BIOS, NULL);
582		if (IS_ERR_OR_NULL(regd))
583			return -EIO;
584	}
585
586	retval = regulatory_set_wiphy_regd_sync(mvm->hw->wiphy, regd);
587	kfree(regd);
588	return retval;
589}
590
591void iwl_mvm_rx_chub_update_mcc(struct iwl_mvm *mvm,
592				struct iwl_rx_cmd_buffer *rxb)
593{
594	struct iwl_rx_packet *pkt = rxb_addr(rxb);
595	struct iwl_mcc_chub_notif *notif = (void *)pkt->data;
596	enum iwl_mcc_source src;
597	char mcc[3];
598	struct ieee80211_regdomain *regd;
599	int wgds_tbl_idx;
600	bool changed = false;
601
602	lockdep_assert_held(&mvm->mutex);
603
604	if (iwl_mvm_is_vif_assoc(mvm) && notif->source_id == MCC_SOURCE_WIFI) {
605		IWL_DEBUG_LAR(mvm, "Ignore mcc update while associated\n");
606		return;
607	}
608
609	if (WARN_ON_ONCE(!iwl_mvm_is_lar_supported(mvm)))
610		return;
611
612	mcc[0] = le16_to_cpu(notif->mcc) >> 8;
613	mcc[1] = le16_to_cpu(notif->mcc) & 0xff;
614	mcc[2] = '\0';
615	src = notif->source_id;
616
617	IWL_DEBUG_LAR(mvm,
618		      "RX: received chub update mcc cmd (mcc '%s' src %d)\n",
619		      mcc, src);
620	regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, mcc, src, &changed);
621	if (IS_ERR_OR_NULL(regd))
622		return;
623
624	if (!changed) {
625		IWL_DEBUG_LAR(mvm, "RX: No change in the regulatory data\n");
626		goto out;
627	}
628
629	wgds_tbl_idx = iwl_mvm_get_sar_geo_profile(mvm);
630	if (wgds_tbl_idx < 1)
631		IWL_DEBUG_INFO(mvm,
632			       "SAR WGDS is disabled or error received (%d)\n",
633			       wgds_tbl_idx);
634	else
635		IWL_DEBUG_INFO(mvm, "SAR WGDS: geo profile %d is configured\n",
636			       wgds_tbl_idx);
637
638	regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
639
640out:
641	kfree(regd);
642}