382 lines
9.2 KiB
C
382 lines
9.2 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright(c) 2021-2022 Intel Corporation
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*/
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#include "iwl-drv.h"
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#include "pnvm.h"
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#include "iwl-prph.h"
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#include "iwl-io.h"
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#include "fw/uefi.h"
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#include "fw/api/alive.h"
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#include <linux/efi.h>
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#include "fw/runtime.h"
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#define IWL_EFI_VAR_GUID EFI_GUID(0x92daaf2f, 0xc02b, 0x455b, \
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0xb2, 0xec, 0xf5, 0xa3, \
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0x59, 0x4f, 0x4a, 0xea)
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void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)
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{
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void *data;
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unsigned long package_size;
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efi_status_t status;
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*len = 0;
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if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
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return ERR_PTR(-ENODEV);
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/*
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* TODO: we hardcode a maximum length here, because reading
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* from the UEFI is not working. To implement this properly,
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* we have to call efivar_entry_size().
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*/
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package_size = IWL_HARDCODED_PNVM_SIZE;
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data = kmalloc(package_size, GFP_KERNEL);
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if (!data)
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return ERR_PTR(-ENOMEM);
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status = efi.get_variable(IWL_UEFI_OEM_PNVM_NAME, &IWL_EFI_VAR_GUID,
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NULL, &package_size, data);
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if (status != EFI_SUCCESS) {
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IWL_DEBUG_FW(trans,
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"PNVM UEFI variable not found 0x%lx (len %lu)\n",
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status, package_size);
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kfree(data);
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return ERR_PTR(-ENOENT);
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}
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IWL_DEBUG_FW(trans, "Read PNVM from UEFI with size %lu\n", package_size);
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*len = package_size;
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return data;
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}
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static void *iwl_uefi_reduce_power_section(struct iwl_trans *trans,
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const u8 *data, size_t len)
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{
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const struct iwl_ucode_tlv *tlv;
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u8 *reduce_power_data = NULL, *tmp;
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u32 size = 0;
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IWL_DEBUG_FW(trans, "Handling REDUCE_POWER section\n");
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while (len >= sizeof(*tlv)) {
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u32 tlv_len, tlv_type;
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len -= sizeof(*tlv);
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tlv = (const void *)data;
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tlv_len = le32_to_cpu(tlv->length);
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tlv_type = le32_to_cpu(tlv->type);
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if (len < tlv_len) {
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IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
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len, tlv_len);
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kfree(reduce_power_data);
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reduce_power_data = ERR_PTR(-EINVAL);
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goto out;
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}
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data += sizeof(*tlv);
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switch (tlv_type) {
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case IWL_UCODE_TLV_MEM_DESC: {
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IWL_DEBUG_FW(trans,
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"Got IWL_UCODE_TLV_MEM_DESC len %d\n",
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tlv_len);
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IWL_DEBUG_FW(trans, "Adding data (size %d)\n", tlv_len);
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tmp = krealloc(reduce_power_data, size + tlv_len, GFP_KERNEL);
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if (!tmp) {
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IWL_DEBUG_FW(trans,
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"Couldn't allocate (more) reduce_power_data\n");
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kfree(reduce_power_data);
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reduce_power_data = ERR_PTR(-ENOMEM);
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goto out;
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}
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reduce_power_data = tmp;
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memcpy(reduce_power_data + size, data, tlv_len);
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size += tlv_len;
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break;
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}
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case IWL_UCODE_TLV_PNVM_SKU:
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IWL_DEBUG_FW(trans,
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"New REDUCE_POWER section started, stop parsing.\n");
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goto done;
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default:
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IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n",
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tlv_type, tlv_len);
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break;
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}
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len -= ALIGN(tlv_len, 4);
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data += ALIGN(tlv_len, 4);
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}
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done:
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if (!size) {
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IWL_DEBUG_FW(trans, "Empty REDUCE_POWER, skipping.\n");
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/* Better safe than sorry, but 'reduce_power_data' should
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* always be NULL if !size.
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*/
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kfree(reduce_power_data);
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reduce_power_data = ERR_PTR(-ENOENT);
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goto out;
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}
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IWL_INFO(trans, "loaded REDUCE_POWER\n");
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out:
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return reduce_power_data;
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}
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static void *iwl_uefi_reduce_power_parse(struct iwl_trans *trans,
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const u8 *data, size_t len)
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{
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const struct iwl_ucode_tlv *tlv;
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void *sec_data;
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IWL_DEBUG_FW(trans, "Parsing REDUCE_POWER data\n");
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while (len >= sizeof(*tlv)) {
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u32 tlv_len, tlv_type;
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len -= sizeof(*tlv);
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tlv = (const void *)data;
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tlv_len = le32_to_cpu(tlv->length);
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tlv_type = le32_to_cpu(tlv->type);
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if (len < tlv_len) {
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IWL_ERR(trans, "invalid TLV len: %zd/%u\n",
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len, tlv_len);
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return ERR_PTR(-EINVAL);
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}
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if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) {
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const struct iwl_sku_id *sku_id =
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(const void *)(data + sizeof(*tlv));
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IWL_DEBUG_FW(trans,
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"Got IWL_UCODE_TLV_PNVM_SKU len %d\n",
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tlv_len);
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IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n",
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le32_to_cpu(sku_id->data[0]),
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le32_to_cpu(sku_id->data[1]),
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le32_to_cpu(sku_id->data[2]));
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data += sizeof(*tlv) + ALIGN(tlv_len, 4);
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len -= ALIGN(tlv_len, 4);
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if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) &&
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trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) &&
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trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) {
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sec_data = iwl_uefi_reduce_power_section(trans,
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data,
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len);
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if (!IS_ERR(sec_data))
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return sec_data;
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} else {
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IWL_DEBUG_FW(trans, "SKU ID didn't match!\n");
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}
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} else {
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data += sizeof(*tlv) + ALIGN(tlv_len, 4);
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len -= ALIGN(tlv_len, 4);
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}
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}
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return ERR_PTR(-ENOENT);
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}
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void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)
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{
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struct pnvm_sku_package *package;
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void *data = NULL;
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unsigned long package_size;
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efi_status_t status;
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*len = 0;
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if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
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return ERR_PTR(-ENODEV);
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/*
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* TODO: we hardcode a maximum length here, because reading
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* from the UEFI is not working. To implement this properly,
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* we have to call efivar_entry_size().
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*/
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package_size = IWL_HARDCODED_REDUCE_POWER_SIZE;
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package = kmalloc(package_size, GFP_KERNEL);
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if (!package)
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return ERR_PTR(-ENOMEM);
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status = efi.get_variable(IWL_UEFI_REDUCED_POWER_NAME, &IWL_EFI_VAR_GUID,
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NULL, &package_size, data);
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if (status != EFI_SUCCESS) {
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IWL_DEBUG_FW(trans,
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"Reduced Power UEFI variable not found 0x%lx (len %lu)\n",
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status, package_size);
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kfree(package);
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return ERR_PTR(-ENOENT);
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}
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IWL_DEBUG_FW(trans, "Read reduced power from UEFI with size %lu\n",
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package_size);
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*len = package_size;
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IWL_DEBUG_FW(trans, "rev %d, total_size %d, n_skus %d\n",
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package->rev, package->total_size, package->n_skus);
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data = iwl_uefi_reduce_power_parse(trans, package->data,
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*len - sizeof(*package));
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kfree(package);
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return data;
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}
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static int iwl_uefi_step_parse(struct uefi_cnv_common_step_data *common_step_data,
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struct iwl_trans *trans)
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{
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if (common_step_data->revision != 1)
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return -EINVAL;
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trans->mbx_addr_0_step = (u32)common_step_data->revision |
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(u32)common_step_data->cnvi_eq_channel << 8 |
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(u32)common_step_data->cnvr_eq_channel << 16 |
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(u32)common_step_data->radio1 << 24;
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trans->mbx_addr_1_step = (u32)common_step_data->radio2;
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return 0;
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}
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void iwl_uefi_get_step_table(struct iwl_trans *trans)
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{
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struct uefi_cnv_common_step_data *data;
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unsigned long package_size;
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efi_status_t status;
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int ret;
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if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210)
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return;
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if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
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return;
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/* TODO: we hardcode a maximum length here, because reading
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* from the UEFI is not working. To implement this properly,
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* we have to call efivar_entry_size().
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*/
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package_size = IWL_HARDCODED_STEP_SIZE;
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data = kmalloc(package_size, GFP_KERNEL);
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if (!data)
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return;
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status = efi.get_variable(IWL_UEFI_STEP_NAME, &IWL_EFI_VAR_GUID,
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NULL, &package_size, data);
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if (status != EFI_SUCCESS) {
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IWL_DEBUG_FW(trans,
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"STEP UEFI variable not found 0x%lx\n", status);
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goto out_free;
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}
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IWL_DEBUG_FW(trans, "Read STEP from UEFI with size %lu\n",
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package_size);
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ret = iwl_uefi_step_parse(data, trans);
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if (ret < 0)
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IWL_DEBUG_FW(trans, "Cannot read STEP tables. rev is invalid\n");
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out_free:
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kfree(data);
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}
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IWL_EXPORT_SYMBOL(iwl_uefi_get_step_table);
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#ifdef CONFIG_ACPI
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static int iwl_uefi_sgom_parse(struct uefi_cnv_wlan_sgom_data *sgom_data,
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struct iwl_fw_runtime *fwrt)
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{
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int i, j;
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if (sgom_data->revision != 1)
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return -EINVAL;
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memcpy(fwrt->sgom_table.offset_map, sgom_data->offset_map,
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sizeof(fwrt->sgom_table.offset_map));
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for (i = 0; i < MCC_TO_SAR_OFFSET_TABLE_ROW_SIZE; i++) {
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for (j = 0; j < MCC_TO_SAR_OFFSET_TABLE_COL_SIZE; j++) {
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/* since each byte is composed of to values, */
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/* one for each letter, */
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/* extract and check each of them separately */
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u8 value = fwrt->sgom_table.offset_map[i][j];
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u8 low = value & 0xF;
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u8 high = (value & 0xF0) >> 4;
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if (high > fwrt->geo_num_profiles)
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high = 0;
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if (low > fwrt->geo_num_profiles)
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low = 0;
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fwrt->sgom_table.offset_map[i][j] = (high << 4) | low;
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}
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}
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fwrt->sgom_enabled = true;
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return 0;
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}
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void iwl_uefi_get_sgom_table(struct iwl_trans *trans,
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struct iwl_fw_runtime *fwrt)
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{
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struct uefi_cnv_wlan_sgom_data *data;
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unsigned long package_size;
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efi_status_t status;
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int ret;
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if (!fwrt->geo_enabled ||
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!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
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return;
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/* TODO: we hardcode a maximum length here, because reading
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* from the UEFI is not working. To implement this properly,
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* we have to call efivar_entry_size().
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*/
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package_size = IWL_HARDCODED_SGOM_SIZE;
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data = kmalloc(package_size, GFP_KERNEL);
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if (!data)
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return;
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status = efi.get_variable(IWL_UEFI_SGOM_NAME, &IWL_EFI_VAR_GUID,
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NULL, &package_size, data);
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if (status != EFI_SUCCESS) {
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IWL_DEBUG_FW(trans,
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"SGOM UEFI variable not found 0x%lx\n", status);
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goto out_free;
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}
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IWL_DEBUG_FW(trans, "Read SGOM from UEFI with size %lu\n",
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package_size);
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ret = iwl_uefi_sgom_parse(data, fwrt);
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if (ret < 0)
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IWL_DEBUG_FW(trans, "Cannot read SGOM tables. rev is invalid\n");
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out_free:
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kfree(data);
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}
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IWL_EXPORT_SYMBOL(iwl_uefi_get_sgom_table);
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#endif /* CONFIG_ACPI */
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