diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw/pnvm.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/pnvm.c | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c b/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c new file mode 100644 index 000000000..650e4bde9 --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c @@ -0,0 +1,394 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright(c) 2020-2023 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" + +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; + + 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); + + 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 = kmemdup(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; + + /* First attempt to get the PNVM from BIOS */ + 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 = kmemdup(package->data, *len, GFP_KERNEL); + } + /* free package regardless of whether kmemdup succeeded */ + kfree(package); + if (image) + return image; + } + + /* If it's not available, 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: + kfree(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); |