357 lines
8.1 KiB
C
357 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright(c) 2020-2021 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/api/commands.h"
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#include "fw/api/nvm-reg.h"
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#include "fw/api/alive.h"
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#include "fw/uefi.h"
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struct iwl_pnvm_section {
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__le32 offset;
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const u8 data[];
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} __packed;
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static bool iwl_pnvm_complete_fn(struct iwl_notif_wait_data *notif_wait,
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struct iwl_rx_packet *pkt, void *data)
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{
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struct iwl_trans *trans = (struct iwl_trans *)data;
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struct iwl_pnvm_init_complete_ntfy *pnvm_ntf = (void *)pkt->data;
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IWL_DEBUG_FW(trans,
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"PNVM complete notification received with status 0x%0x\n",
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le32_to_cpu(pnvm_ntf->status));
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return true;
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}
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static int iwl_pnvm_handle_section(struct iwl_trans *trans, const u8 *data,
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size_t len)
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{
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const struct iwl_ucode_tlv *tlv;
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u32 sha1 = 0;
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u16 mac_type = 0, rf_id = 0;
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u8 *pnvm_data = NULL, *tmp;
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bool hw_match = false;
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u32 size = 0;
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int ret;
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IWL_DEBUG_FW(trans, "Handling PNVM 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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ret = -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_PNVM_VERSION:
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if (tlv_len < sizeof(__le32)) {
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IWL_DEBUG_FW(trans,
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"Invalid size for IWL_UCODE_TLV_PNVM_VERSION (expected %zd, got %d)\n",
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sizeof(__le32), tlv_len);
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break;
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}
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sha1 = le32_to_cpup((const __le32 *)data);
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IWL_DEBUG_FW(trans,
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"Got IWL_UCODE_TLV_PNVM_VERSION %0x\n",
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sha1);
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break;
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case IWL_UCODE_TLV_HW_TYPE:
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if (tlv_len < 2 * sizeof(__le16)) {
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IWL_DEBUG_FW(trans,
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"Invalid size for IWL_UCODE_TLV_HW_TYPE (expected %zd, got %d)\n",
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2 * sizeof(__le16), tlv_len);
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break;
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}
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if (hw_match)
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break;
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mac_type = le16_to_cpup((const __le16 *)data);
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rf_id = le16_to_cpup((const __le16 *)(data + sizeof(__le16)));
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IWL_DEBUG_FW(trans,
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"Got IWL_UCODE_TLV_HW_TYPE mac_type 0x%0x rf_id 0x%0x\n",
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mac_type, rf_id);
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if (mac_type == CSR_HW_REV_TYPE(trans->hw_rev) &&
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rf_id == CSR_HW_RFID_TYPE(trans->hw_rf_id))
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hw_match = true;
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break;
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case IWL_UCODE_TLV_SEC_RT: {
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const struct iwl_pnvm_section *section = (const void *)data;
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u32 data_len = tlv_len - sizeof(*section);
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IWL_DEBUG_FW(trans,
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"Got IWL_UCODE_TLV_SEC_RT len %d\n",
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tlv_len);
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/* TODO: remove, this is a deprecated separator */
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if (le32_to_cpup((const __le32 *)data) == 0xddddeeee) {
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IWL_DEBUG_FW(trans, "Ignoring separator.\n");
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break;
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}
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IWL_DEBUG_FW(trans, "Adding data (size %d)\n",
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data_len);
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tmp = krealloc(pnvm_data, size + data_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) pnvm_data\n");
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ret = -ENOMEM;
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goto out;
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}
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pnvm_data = tmp;
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memcpy(pnvm_data + size, section->data, data_len);
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size += data_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 PNVM 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 (!hw_match) {
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IWL_DEBUG_FW(trans,
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"HW mismatch, skipping PNVM section (need mac_type 0x%x rf_id 0x%x)\n",
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CSR_HW_REV_TYPE(trans->hw_rev),
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CSR_HW_RFID_TYPE(trans->hw_rf_id));
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ret = -ENOENT;
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goto out;
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}
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if (!size) {
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IWL_DEBUG_FW(trans, "Empty PNVM, skipping.\n");
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ret = -ENOENT;
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goto out;
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}
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IWL_INFO(trans, "loaded PNVM version %08x\n", sha1);
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ret = iwl_trans_set_pnvm(trans, pnvm_data, size);
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out:
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kfree(pnvm_data);
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return ret;
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}
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static int iwl_pnvm_parse(struct iwl_trans *trans, const u8 *data,
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size_t len)
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{
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const struct iwl_ucode_tlv *tlv;
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IWL_DEBUG_FW(trans, "Parsing PNVM file\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 -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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int ret;
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ret = iwl_pnvm_handle_section(trans, data, len);
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if (!ret)
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return 0;
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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 -ENOENT;
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}
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static int iwl_pnvm_get_from_fs(struct iwl_trans *trans, u8 **data, size_t *len)
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{
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const struct firmware *pnvm;
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char pnvm_name[MAX_PNVM_NAME];
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size_t new_len;
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int ret;
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iwl_pnvm_get_fs_name(trans, pnvm_name, sizeof(pnvm_name));
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ret = firmware_request_nowarn(&pnvm, pnvm_name, trans->dev);
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if (ret) {
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IWL_DEBUG_FW(trans, "PNVM file %s not found %d\n",
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pnvm_name, ret);
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return ret;
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}
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new_len = pnvm->size;
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*data = kmemdup(pnvm->data, pnvm->size, GFP_KERNEL);
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release_firmware(pnvm);
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if (!*data)
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return -ENOMEM;
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*len = new_len;
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return 0;
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}
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int iwl_pnvm_load(struct iwl_trans *trans,
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struct iwl_notif_wait_data *notif_wait)
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{
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u8 *data;
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size_t len;
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struct pnvm_sku_package *package;
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struct iwl_notification_wait pnvm_wait;
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static const u16 ntf_cmds[] = { WIDE_ID(REGULATORY_AND_NVM_GROUP,
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PNVM_INIT_COMPLETE_NTFY) };
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int ret;
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/* if the SKU_ID is empty, there's nothing to do */
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if (!trans->sku_id[0] && !trans->sku_id[1] && !trans->sku_id[2])
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return 0;
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/*
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* If we already loaded (or tried to load) it before, we just
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* need to set it again.
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*/
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if (trans->pnvm_loaded) {
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ret = iwl_trans_set_pnvm(trans, NULL, 0);
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if (ret)
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return ret;
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goto skip_parse;
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}
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/* First attempt to get the PNVM from BIOS */
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package = iwl_uefi_get_pnvm(trans, &len);
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if (!IS_ERR_OR_NULL(package)) {
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if (len >= sizeof(*package)) {
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/* we need only the data */
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len -= sizeof(*package);
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data = kmemdup(package->data, len, GFP_KERNEL);
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} else {
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data = NULL;
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}
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/* free package regardless of whether kmemdup succeeded */
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kfree(package);
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if (data)
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goto parse;
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}
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/* If it's not available, try from the filesystem */
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ret = iwl_pnvm_get_from_fs(trans, &data, &len);
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if (ret) {
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/*
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* Pretend we've loaded it - at least we've tried and
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* couldn't load it at all, so there's no point in
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* trying again over and over.
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*/
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trans->pnvm_loaded = true;
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goto skip_parse;
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}
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parse:
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iwl_pnvm_parse(trans, data, len);
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kfree(data);
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skip_parse:
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data = NULL;
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/* now try to get the reduce power table, if not loaded yet */
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if (!trans->reduce_power_loaded) {
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data = iwl_uefi_get_reduced_power(trans, &len);
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if (IS_ERR_OR_NULL(data)) {
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/*
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* Pretend we've loaded it - at least we've tried and
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* couldn't load it at all, so there's no point in
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* trying again over and over.
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*/
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trans->reduce_power_loaded = true;
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goto skip_reduce_power;
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}
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}
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ret = iwl_trans_set_reduce_power(trans, data, len);
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if (ret)
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IWL_DEBUG_FW(trans,
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"Failed to set reduce power table %d\n",
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ret);
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kfree(data);
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skip_reduce_power:
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iwl_init_notification_wait(notif_wait, &pnvm_wait,
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ntf_cmds, ARRAY_SIZE(ntf_cmds),
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iwl_pnvm_complete_fn, trans);
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/* kick the doorbell */
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iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6,
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UREG_DOORBELL_TO_ISR6_PNVM);
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return iwl_wait_notification(notif_wait, &pnvm_wait,
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MVM_UCODE_PNVM_TIMEOUT);
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}
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IWL_EXPORT_SYMBOL(iwl_pnvm_load);
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