drivers/net/wireless/intel/iwlwifi/fw/pnvm.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
  * Copyright(c) 2020-2024 Intel Corporation
  */

 #include "iwl-drv.h"
 #include "pnvm.h"
 #include "iwl-prph.h"
 #include "iwl-io.h"
 #include "fw/api/commands.h"
 #include "fw/api/nvm-reg.h"
 #include "fw/api/alive.h"
 #include "fw/uefi.h"

 #define IWL_PNVM_REDUCED_CAP_BIT BIT(25)

 struct iwl_pnvm_section {
 	__le32 offset;
 	const u8 data[];
 } __packed;

 static bool iwl_pnvm_complete_fn(struct iwl_notif_wait_data *notif_wait,
 				 struct iwl_rx_packet *pkt, void *data)
 {
 	struct iwl_trans *trans = (struct iwl_trans *)data;
 	struct iwl_pnvm_init_complete_ntfy *pnvm_ntf = (void *)pkt->data;

 	IWL_DEBUG_FW(trans,
 		     "PNVM complete notification received with status 0x%0x\n",
 		     le32_to_cpu(pnvm_ntf->status));

 	return true;
 }

 static int iwl_pnvm_handle_section(struct iwl_trans *trans, const u8 *data,
 				   size_t len,
 				   struct iwl_pnvm_image *pnvm_data)
 {
 	const struct iwl_ucode_tlv *tlv;
 	u32 sha1 = 0;
 	u16 mac_type = 0, rf_id = 0;
 	bool hw_match = false;

 	IWL_DEBUG_FW(trans, "Handling PNVM section\n");

 	memset(pnvm_data, 0, sizeof(*pnvm_data));

 	while (len >= sizeof(*tlv)) {
 		u32 tlv_len, tlv_type;

 		len -= sizeof(*tlv);
 		tlv = (const void *)data;

 		tlv_len = le32_to_cpu(tlv->length);
 		tlv_type = le32_to_cpu(tlv->type);

 		if (len < tlv_len) {
 			IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
 				len, tlv_len);
 			return -EINVAL;
 		}

 		data += sizeof(*tlv);

 		switch (tlv_type) {
 		case IWL_UCODE_TLV_PNVM_VERSION:
 			if (tlv_len < sizeof(__le32)) {
 				IWL_DEBUG_FW(trans,
 					     "Invalid size for IWL_UCODE_TLV_PNVM_VERSION (expected %zd, got %d)\n",
 					     sizeof(__le32), tlv_len);
 				break;
 			}

 			sha1 = le32_to_cpup((const __le32 *)data);

 			IWL_DEBUG_FW(trans,
 				     "Got IWL_UCODE_TLV_PNVM_VERSION %0x\n",
 				     sha1);
 			pnvm_data->version = sha1;
 			break;
 		case IWL_UCODE_TLV_HW_TYPE:
 			if (tlv_len < 2 * sizeof(__le16)) {
 				IWL_DEBUG_FW(trans,
 					     "Invalid size for IWL_UCODE_TLV_HW_TYPE (expected %zd, got %d)\n",
 					     2 * sizeof(__le16), tlv_len);
 				break;
 			}

 			if (hw_match)
 				break;

 			mac_type = le16_to_cpup((const __le16 *)data);
 			rf_id = le16_to_cpup((const __le16 *)(data + sizeof(__le16)));

 			IWL_DEBUG_FW(trans,
 				     "Got IWL_UCODE_TLV_HW_TYPE mac_type 0x%0x rf_id 0x%0x\n",
 				     mac_type, rf_id);

 			if (mac_type == CSR_HW_REV_TYPE(trans->hw_rev) &&
 			    rf_id == CSR_HW_RFID_TYPE(trans->hw_rf_id))
 				hw_match = true;
 			break;
 		case IWL_UCODE_TLV_SEC_RT: {
 			const struct iwl_pnvm_section *section = (const void *)data;
 			u32 data_len = tlv_len - sizeof(*section);

 			IWL_DEBUG_FW(trans,
 				     "Got IWL_UCODE_TLV_SEC_RT len %d\n",
 				     tlv_len);

 			/* TODO: remove, this is a deprecated separator */
 			if (le32_to_cpup((const __le32 *)data) == 0xddddeeee) {
 				IWL_DEBUG_FW(trans, "Ignoring separator.\n");
 				break;
 			}

 			if (pnvm_data->n_chunks == IPC_DRAM_MAP_ENTRY_NUM_MAX) {
 				IWL_DEBUG_FW(trans,
 					     "too many payloads to allocate in DRAM.\n");
 				return -EINVAL;
 			}

 			IWL_DEBUG_FW(trans, "Adding data (size %d)\n",
 				     data_len);

 			pnvm_data->chunks[pnvm_data->n_chunks].data = section->data;
 			pnvm_data->chunks[pnvm_data->n_chunks].len = data_len;
 			pnvm_data->n_chunks++;

 			break;
 		}
 		case IWL_UCODE_TLV_MEM_DESC:
 			if (iwl_uefi_handle_tlv_mem_desc(trans, data, tlv_len,
 							 pnvm_data))
 				return -EINVAL;
 			break;
 		case IWL_UCODE_TLV_PNVM_SKU:
 			IWL_DEBUG_FW(trans,
 				     "New PNVM section started, stop parsing.\n");
 			goto done;
 		default:
 			IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n",
 				     tlv_type, tlv_len);
 			break;
 		}

 		len -= ALIGN(tlv_len, 4);
 		data += ALIGN(tlv_len, 4);
 	}

 done:
 	if (!hw_match) {
 		IWL_DEBUG_FW(trans,
 			     "HW mismatch, skipping PNVM section (need mac_type 0x%x rf_id 0x%x)\n",
 			     CSR_HW_REV_TYPE(trans->hw_rev),
 			     CSR_HW_RFID_TYPE(trans->hw_rf_id));
 		return -ENOENT;
 	}

 	if (!pnvm_data->n_chunks) {
 		IWL_DEBUG_FW(trans, "Empty PNVM, skipping.\n");
 		return -ENOENT;
 	}

 	return 0;
 }

 static int iwl_pnvm_parse(struct iwl_trans *trans, const u8 *data,
 			  size_t len,
 			  struct iwl_pnvm_image *pnvm_data)
 {
 	const struct iwl_ucode_tlv *tlv;

 	IWL_DEBUG_FW(trans, "Parsing PNVM file\n");

 	while (len >= sizeof(*tlv)) {
 		u32 tlv_len, tlv_type;
 		u32 rf_type;

 		len -= sizeof(*tlv);
 		tlv = (const void *)data;

 		tlv_len = le32_to_cpu(tlv->length);
 		tlv_type = le32_to_cpu(tlv->type);

 		if (len < tlv_len) {
 			IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
 				len, tlv_len);
 			return -EINVAL;
 		}

 		if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) {
 			const struct iwl_sku_id *sku_id =
 				(const void *)(data + sizeof(*tlv));

 			IWL_DEBUG_FW(trans,
 				     "Got IWL_UCODE_TLV_PNVM_SKU len %d\n",
 				     tlv_len);
 			IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n",
 				     le32_to_cpu(sku_id->data[0]),
 				     le32_to_cpu(sku_id->data[1]),
 				     le32_to_cpu(sku_id->data[2]));

 			data += sizeof(*tlv) + ALIGN(tlv_len, 4);
 			len -= ALIGN(tlv_len, 4);

 			trans->reduced_cap_sku = false;
 			rf_type = CSR_HW_RFID_TYPE(trans->hw_rf_id);
 			if ((trans->sku_id[0] & IWL_PNVM_REDUCED_CAP_BIT) &&
 			    rf_type == IWL_CFG_RF_TYPE_FM)
 				trans->reduced_cap_sku = true;

 			IWL_DEBUG_FW(trans,
 				     "Reduced SKU device %d\n",
 				     trans->reduced_cap_sku);

 			if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) &&
 			    trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) &&
 			    trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) {
 				int ret;

 				ret = iwl_pnvm_handle_section(trans, data, len,
 							      pnvm_data);
 				if (!ret)
 					return 0;
 			} else {
 				IWL_DEBUG_FW(trans, "SKU ID didn't match!\n");
 			}
 		} else {
 			data += sizeof(*tlv) + ALIGN(tlv_len, 4);
 			len -= ALIGN(tlv_len, 4);
 		}
 	}

 	return -ENOENT;
 }

 static int iwl_pnvm_get_from_fs(struct iwl_trans *trans, u8 **data, size_t *len)
 {
 	const struct firmware *pnvm;
 	char pnvm_name[MAX_PNVM_NAME];
 	size_t new_len;
 	int ret;

 	iwl_pnvm_get_fs_name(trans, pnvm_name, sizeof(pnvm_name));

 	ret = firmware_request_nowarn(&pnvm, pnvm_name, trans->dev);
 	if (ret) {
 		IWL_DEBUG_FW(trans, "PNVM file %s not found %d\n",
 			     pnvm_name, ret);
 		return ret;
 	}

 	new_len = pnvm->size;
 	*data = kvmemdup(pnvm->data, pnvm->size, GFP_KERNEL);
 	release_firmware(pnvm);

 	if (!*data)
 		return -ENOMEM;

 	*len = new_len;

 	return 0;
 }

 static u8 *iwl_get_pnvm_image(struct iwl_trans *trans_p, size_t *len)
 {
 	struct pnvm_sku_package *package;
 	u8 *image = NULL;

 	/* Get PNVM from BIOS for non-Intel SKU */
 	if (trans_p->sku_id[2]) {
 		package = iwl_uefi_get_pnvm(trans_p, len);
 		if (!IS_ERR_OR_NULL(package)) {
 			if (*len >= sizeof(*package)) {
 				/* we need only the data */
 				*len -= sizeof(*package);
 				image = kvmemdup(package->data,
 						 *len, GFP_KERNEL);
 			}
 			/*
 			 * free package regardless of whether kmemdup
 			 * succeeded
 			 */
 			kfree(package);
 			if (image)
 				return image;
 		}
 	}

 	/* If it's not available, or for Intel SKU, try from the filesystem */
 	if (iwl_pnvm_get_from_fs(trans_p, &image, len))
 		return NULL;
 	return image;
 }

 static void iwl_pnvm_load_pnvm_to_trans(struct iwl_trans *trans,
 					const struct iwl_ucode_capabilities *capa)
 {
 	struct iwl_pnvm_image *pnvm_data = NULL;
 	u8 *data = NULL;
 	size_t length;
 	int ret;

 	/* failed to get/parse the image in the past, no use trying again */
 	if (trans->fail_to_parse_pnvm_image)
 		return;

 	if (trans->pnvm_loaded)
 		goto set;

 	data = iwl_get_pnvm_image(trans, &length);
 	if (!data) {
 		trans->fail_to_parse_pnvm_image = true;
 		return;
 	}

 	pnvm_data = kzalloc(sizeof(*pnvm_data), GFP_KERNEL);
 	if (!pnvm_data)
 		goto free;

 	ret = iwl_pnvm_parse(trans, data, length, pnvm_data);
 	if (ret) {
 		trans->fail_to_parse_pnvm_image = true;
 		goto free;
 	}

 	ret = iwl_trans_load_pnvm(trans, pnvm_data, capa);
 	if (ret)
 		goto free;
 	IWL_INFO(trans, "loaded PNVM version %08x\n", pnvm_data->version);

 set:
 	iwl_trans_set_pnvm(trans, capa);
 free:
 	kvfree(data);
 	kfree(pnvm_data);
 }

 static void
 iwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans,
 				    const struct iwl_ucode_capabilities *capa)
 {
 	struct iwl_pnvm_image *pnvm_data = NULL;
 	u8 *data = NULL;
 	size_t length;
 	int ret;

 	if (trans->failed_to_load_reduce_power_image)
 		return;

 	if (trans->reduce_power_loaded)
 		goto set;

 	data = iwl_uefi_get_reduced_power(trans, &length);
 	if (IS_ERR(data)) {
 		trans->failed_to_load_reduce_power_image = true;
 		return;
 	}

 	pnvm_data = kzalloc(sizeof(*pnvm_data), GFP_KERNEL);
 	if (!pnvm_data)
 		goto free;

 	ret = iwl_uefi_reduce_power_parse(trans, data, length, pnvm_data);
 	if (ret) {
 		trans->failed_to_load_reduce_power_image = true;
 		goto free;
 	}

 	ret = iwl_trans_load_reduce_power(trans, pnvm_data, capa);
 	if (ret) {
 		IWL_DEBUG_FW(trans,
 			     "Failed to load reduce power table %d\n",
 			     ret);
 		trans->failed_to_load_reduce_power_image = true;
 		goto free;
 	}

 set:
 	iwl_trans_set_reduce_power(trans, capa);
 free:
 	kfree(data);
 	kfree(pnvm_data);
 }

 int iwl_pnvm_load(struct iwl_trans *trans,
 		  struct iwl_notif_wait_data *notif_wait,
 		  const struct iwl_ucode_capabilities *capa)
 {
 	struct iwl_notification_wait pnvm_wait;
 	static const u16 ntf_cmds[] = { WIDE_ID(REGULATORY_AND_NVM_GROUP,
 						PNVM_INIT_COMPLETE_NTFY) };

 	/* if the SKU_ID is empty, there's nothing to do */
 	if (!trans->sku_id[0] && !trans->sku_id[1] && !trans->sku_id[2])
 		return 0;

 	iwl_pnvm_load_pnvm_to_trans(trans, capa);
 	iwl_pnvm_load_reduce_power_to_trans(trans, capa);

 	iwl_init_notification_wait(notif_wait, &pnvm_wait,
 				   ntf_cmds, ARRAY_SIZE(ntf_cmds),
 				   iwl_pnvm_complete_fn, trans);

 	/* kick the doorbell */
 	iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
 			    UREG_DOORBELL_TO_ISR6_PNVM);

 	return iwl_wait_notification(notif_wait, &pnvm_wait,
 				     MVM_UCODE_PNVM_TIMEOUT);
 }
 IWL_EXPORT_SYMBOL(iwl_pnvm_load);
	// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
	/*
	* Copyright(c) 2020-2024 Intel Corporation
	*/

	#include "iwl-drv.h"
	#include "pnvm.h"
	#include "iwl-prph.h"
	#include "iwl-io.h"
	#include "fw/api/commands.h"
	#include "fw/api/nvm-reg.h"
	#include "fw/api/alive.h"
	#include "fw/uefi.h"

	#define IWL_PNVM_REDUCED_CAP_BIT BIT(25)

	struct iwl_pnvm_section {
	__le32 offset;
	const u8 data[];
	} __packed;

	static bool iwl_pnvm_complete_fn(struct iwl_notif_wait_data *notif_wait,
	struct iwl_rx_packet pkt, void data)
	{
	struct iwl_trans trans = (struct iwl_trans )data;
	struct iwl_pnvm_init_complete_ntfy pnvm_ntf = (void )pkt->data;

	IWL_DEBUG_FW(trans,
	"PNVM complete notification received with status 0x%0x\n",
	le32_to_cpu(pnvm_ntf->status));

	return true;
	}

	static int iwl_pnvm_handle_section(struct iwl_trans trans, const u8 data,
	size_t len,
	struct iwl_pnvm_image *pnvm_data)
	{
	const struct iwl_ucode_tlv *tlv;
	u32 sha1 = 0;
	u16 mac_type = 0, rf_id = 0;
	bool hw_match = false;

	IWL_DEBUG_FW(trans, "Handling PNVM section\n");

	memset(pnvm_data, 0, sizeof(*pnvm_data));

	while (len >= sizeof(*tlv)) {
	u32 tlv_len, tlv_type;

	len -= sizeof(*tlv);
	tlv = (const void *)data;

	tlv_len = le32_to_cpu(tlv->length);
	tlv_type = le32_to_cpu(tlv->type);

	if (len < tlv_len) {
	IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
	len, tlv_len);
	return -EINVAL;
	}

	data += sizeof(*tlv);

	switch (tlv_type) {
	case IWL_UCODE_TLV_PNVM_VERSION:
	if (tlv_len < sizeof(__le32)) {
	IWL_DEBUG_FW(trans,
	"Invalid size for IWL_UCODE_TLV_PNVM_VERSION (expected %zd, got %d)\n",
	sizeof(__le32), tlv_len);
	break;
	}

	sha1 = le32_to_cpup((const __le32 *)data);

	IWL_DEBUG_FW(trans,
	"Got IWL_UCODE_TLV_PNVM_VERSION %0x\n",
	sha1);
	pnvm_data->version = sha1;
	break;
	case IWL_UCODE_TLV_HW_TYPE:
	if (tlv_len < 2 * sizeof(__le16)) {
	IWL_DEBUG_FW(trans,
	"Invalid size for IWL_UCODE_TLV_HW_TYPE (expected %zd, got %d)\n",
	2 * sizeof(__le16), tlv_len);
	break;
	}

	if (hw_match)
	break;

	mac_type = le16_to_cpup((const __le16 *)data);
	rf_id = le16_to_cpup((const __le16 *)(data + sizeof(__le16)));

	IWL_DEBUG_FW(trans,
	"Got IWL_UCODE_TLV_HW_TYPE mac_type 0x%0x rf_id 0x%0x\n",
	mac_type, rf_id);

	if (mac_type == CSR_HW_REV_TYPE(trans->hw_rev) &&
	rf_id == CSR_HW_RFID_TYPE(trans->hw_rf_id))
	hw_match = true;
	break;
	case IWL_UCODE_TLV_SEC_RT: {
	const struct iwl_pnvm_section section = (const void )data;
	u32 data_len = tlv_len - sizeof(*section);

	IWL_DEBUG_FW(trans,
	"Got IWL_UCODE_TLV_SEC_RT len %d\n",
	tlv_len);

	/* TODO: remove, this is a deprecated separator */
	if (le32_to_cpup((const __le32 *)data) == 0xddddeeee) {
	IWL_DEBUG_FW(trans, "Ignoring separator.\n");
	break;
	}

	if (pnvm_data->n_chunks == IPC_DRAM_MAP_ENTRY_NUM_MAX) {
	IWL_DEBUG_FW(trans,
	"too many payloads to allocate in DRAM.\n");
	return -EINVAL;
	}

	IWL_DEBUG_FW(trans, "Adding data (size %d)\n",
	data_len);

	pnvm_data->chunks[pnvm_data->n_chunks].data = section->data;
	pnvm_data->chunks[pnvm_data->n_chunks].len = data_len;
	pnvm_data->n_chunks++;

	break;
	}
	case IWL_UCODE_TLV_MEM_DESC:
	if (iwl_uefi_handle_tlv_mem_desc(trans, data, tlv_len,
	pnvm_data))
	return -EINVAL;
	break;
	case IWL_UCODE_TLV_PNVM_SKU:
	IWL_DEBUG_FW(trans,
	"New PNVM section started, stop parsing.\n");
	goto done;
	default:
	IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n",
	tlv_type, tlv_len);
	break;
	}

	len -= ALIGN(tlv_len, 4);
	data += ALIGN(tlv_len, 4);
	}

	done:
	if (!hw_match) {
	IWL_DEBUG_FW(trans,
	"HW mismatch, skipping PNVM section (need mac_type 0x%x rf_id 0x%x)\n",
	CSR_HW_REV_TYPE(trans->hw_rev),
	CSR_HW_RFID_TYPE(trans->hw_rf_id));
	return -ENOENT;
	}

	if (!pnvm_data->n_chunks) {
	IWL_DEBUG_FW(trans, "Empty PNVM, skipping.\n");
	return -ENOENT;
	}

	return 0;
	}

	static int iwl_pnvm_parse(struct iwl_trans trans, const u8 data,
	size_t len,
	struct iwl_pnvm_image *pnvm_data)
	{
	const struct iwl_ucode_tlv *tlv;

	IWL_DEBUG_FW(trans, "Parsing PNVM file\n");

	while (len >= sizeof(*tlv)) {
	u32 tlv_len, tlv_type;
	u32 rf_type;

	len -= sizeof(*tlv);
	tlv = (const void *)data;

	tlv_len = le32_to_cpu(tlv->length);
	tlv_type = le32_to_cpu(tlv->type);

	if (len < tlv_len) {
	IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
	len, tlv_len);
	return -EINVAL;
	}

	if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) {
	const struct iwl_sku_id *sku_id =
	(const void )(data + sizeof(tlv));

	IWL_DEBUG_FW(trans,
	"Got IWL_UCODE_TLV_PNVM_SKU len %d\n",
	tlv_len);
	IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n",
	le32_to_cpu(sku_id->data[0]),
	le32_to_cpu(sku_id->data[1]),
	le32_to_cpu(sku_id->data[2]));

	data += sizeof(*tlv) + ALIGN(tlv_len, 4);
	len -= ALIGN(tlv_len, 4);

	trans->reduced_cap_sku = false;
	rf_type = CSR_HW_RFID_TYPE(trans->hw_rf_id);
	if ((trans->sku_id[0] & IWL_PNVM_REDUCED_CAP_BIT) &&
	rf_type == IWL_CFG_RF_TYPE_FM)
	trans->reduced_cap_sku = true;

	IWL_DEBUG_FW(trans,
	"Reduced SKU device %d\n",
	trans->reduced_cap_sku);

	if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) &&
	trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) &&
	trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) {
	int ret;

	ret = iwl_pnvm_handle_section(trans, data, len,
	pnvm_data);
	if (!ret)
	return 0;
	} else {
	IWL_DEBUG_FW(trans, "SKU ID didn't match!\n");
	}
	} else {
	data += sizeof(*tlv) + ALIGN(tlv_len, 4);
	len -= ALIGN(tlv_len, 4);
	}
	}

	return -ENOENT;
	}

	static int iwl_pnvm_get_from_fs(struct iwl_trans trans, u8 data, size_t len)
	{
	const struct firmware *pnvm;
	char pnvm_name[MAX_PNVM_NAME];
	size_t new_len;
	int ret;

	iwl_pnvm_get_fs_name(trans, pnvm_name, sizeof(pnvm_name));

	ret = firmware_request_nowarn(&pnvm, pnvm_name, trans->dev);
	if (ret) {
	IWL_DEBUG_FW(trans, "PNVM file %s not found %d\n",
	pnvm_name, ret);
	return ret;
	}

	new_len = pnvm->size;
	*data = kvmemdup(pnvm->data, pnvm->size, GFP_KERNEL);
	release_firmware(pnvm);

	if (!*data)
	return -ENOMEM;

	*len = new_len;

	return 0;
	}

	static u8 iwl_get_pnvm_image(struct iwl_trans trans_p, size_t *len)
	{
	struct pnvm_sku_package *package;
	u8 *image = NULL;

	/* Get PNVM from BIOS for non-Intel SKU */
	if (trans_p->sku_id[2]) {
	package = iwl_uefi_get_pnvm(trans_p, len);
	if (!IS_ERR_OR_NULL(package)) {
	if (len >= sizeof(package)) {
	/* we need only the data */
	len -= sizeof(package);
	image = kvmemdup(package->data,
	*len, GFP_KERNEL);
	}
	/*
	* free package regardless of whether kmemdup
	* succeeded
	*/
	kfree(package);
	if (image)
	return image;
	}
	}

	/* If it's not available, or for Intel SKU, try from the filesystem */
	if (iwl_pnvm_get_from_fs(trans_p, &image, len))
	return NULL;
	return image;
	}

	static void iwl_pnvm_load_pnvm_to_trans(struct iwl_trans *trans,
	const struct iwl_ucode_capabilities *capa)
	{
	struct iwl_pnvm_image *pnvm_data = NULL;
	u8 *data = NULL;
	size_t length;
	int ret;

	/* failed to get/parse the image in the past, no use trying again */
	if (trans->fail_to_parse_pnvm_image)
	return;

	if (trans->pnvm_loaded)
	goto set;

	data = iwl_get_pnvm_image(trans, &length);
	if (!data) {
	trans->fail_to_parse_pnvm_image = true;
	return;
	}

	pnvm_data = kzalloc(sizeof(*pnvm_data), GFP_KERNEL);
	if (!pnvm_data)
	goto free;

	ret = iwl_pnvm_parse(trans, data, length, pnvm_data);
	if (ret) {
	trans->fail_to_parse_pnvm_image = true;
	goto free;
	}

	ret = iwl_trans_load_pnvm(trans, pnvm_data, capa);
	if (ret)
	goto free;
	IWL_INFO(trans, "loaded PNVM version %08x\n", pnvm_data->version);

	set:
	iwl_trans_set_pnvm(trans, capa);
	free:
	kvfree(data);
	kfree(pnvm_data);
	}

	static void
	iwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans,
	const struct iwl_ucode_capabilities *capa)
	{
	struct iwl_pnvm_image *pnvm_data = NULL;
	u8 *data = NULL;
	size_t length;
	int ret;

	if (trans->failed_to_load_reduce_power_image)
	return;

	if (trans->reduce_power_loaded)
	goto set;

	data = iwl_uefi_get_reduced_power(trans, &length);
	if (IS_ERR(data)) {
	trans->failed_to_load_reduce_power_image = true;
	return;
	}

	pnvm_data = kzalloc(sizeof(*pnvm_data), GFP_KERNEL);
	if (!pnvm_data)
	goto free;

	ret = iwl_uefi_reduce_power_parse(trans, data, length, pnvm_data);
	if (ret) {
	trans->failed_to_load_reduce_power_image = true;
	goto free;
	}

	ret = iwl_trans_load_reduce_power(trans, pnvm_data, capa);
	if (ret) {
	IWL_DEBUG_FW(trans,
	"Failed to load reduce power table %d\n",
	ret);
	trans->failed_to_load_reduce_power_image = true;
	goto free;
	}

	set:
	iwl_trans_set_reduce_power(trans, capa);
	free:
	kfree(data);
	kfree(pnvm_data);
	}

	int iwl_pnvm_load(struct iwl_trans *trans,
	struct iwl_notif_wait_data *notif_wait,
	const struct iwl_ucode_capabilities *capa)
	{
	struct iwl_notification_wait pnvm_wait;
	static const u16 ntf_cmds[] = { WIDE_ID(REGULATORY_AND_NVM_GROUP,
	PNVM_INIT_COMPLETE_NTFY) };

	/* if the SKU_ID is empty, there's nothing to do */
	if (!trans->sku_id[0] && !trans->sku_id[1] && !trans->sku_id[2])
	return 0;

	iwl_pnvm_load_pnvm_to_trans(trans, capa);
	iwl_pnvm_load_reduce_power_to_trans(trans, capa);

	iwl_init_notification_wait(notif_wait, &pnvm_wait,
	ntf_cmds, ARRAY_SIZE(ntf_cmds),
	iwl_pnvm_complete_fn, trans);

	/* kick the doorbell */
	iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
	UREG_DOORBELL_TO_ISR6_PNVM);

	return iwl_wait_notification(notif_wait, &pnvm_wait,
	MVM_UCODE_PNVM_TIMEOUT);
	}
	IWL_EXPORT_SYMBOL(iwl_pnvm_load);