diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath12k/acpi.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath12k/acpi.c | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath12k/acpi.c b/drivers/net/wireless/ath/ath12k/acpi.c new file mode 100644 index 000000000000..443ba12e01f3 --- /dev/null +++ b/drivers/net/wireless/ath/ath12k/acpi.c @@ -0,0 +1,394 @@ +// SPDX-License-Identifier: BSD-3-Clause-Clear +/* + * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved. + * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include "core.h" +#include "acpi.h" +#include "debug.h" + +static int ath12k_acpi_dsm_get_data(struct ath12k_base *ab, int func) +{ + union acpi_object *obj; + acpi_handle root_handle; + int ret; + + root_handle = ACPI_HANDLE(ab->dev); + if (!root_handle) { + ath12k_dbg(ab, ATH12K_DBG_BOOT, "invalid acpi handler\n"); + return -EOPNOTSUPP; + } + + obj = acpi_evaluate_dsm(root_handle, ab->hw_params->acpi_guid, 0, func, + NULL); + + if (!obj) { + ath12k_dbg(ab, ATH12K_DBG_BOOT, "acpi_evaluate_dsm() failed\n"); + return -ENOENT; + } + + if (obj->type == ACPI_TYPE_INTEGER) { + ab->acpi.func_bit = obj->integer.value; + } else if (obj->type == ACPI_TYPE_BUFFER) { + switch (func) { + case ATH12K_ACPI_DSM_FUNC_TAS_CFG: + if (obj->buffer.length != ATH12K_ACPI_DSM_TAS_CFG_SIZE) { + ath12k_warn(ab, "invalid ACPI DSM TAS config size: %d\n", + obj->buffer.length); + ret = -EINVAL; + goto out; + } + + memcpy(&ab->acpi.tas_cfg, obj->buffer.pointer, + obj->buffer.length); + + break; + case ATH12K_ACPI_DSM_FUNC_TAS_DATA: + if (obj->buffer.length != ATH12K_ACPI_DSM_TAS_DATA_SIZE) { + ath12k_warn(ab, "invalid ACPI DSM TAS data size: %d\n", + obj->buffer.length); + ret = -EINVAL; + goto out; + } + + memcpy(&ab->acpi.tas_sar_power_table, obj->buffer.pointer, + obj->buffer.length); + + break; + case ATH12K_ACPI_DSM_FUNC_BIOS_SAR: + if (obj->buffer.length != ATH12K_ACPI_DSM_BIOS_SAR_DATA_SIZE) { + ath12k_warn(ab, "invalid ACPI BIOS SAR data size: %d\n", + obj->buffer.length); + ret = -EINVAL; + goto out; + } + + memcpy(&ab->acpi.bios_sar_data, obj->buffer.pointer, + obj->buffer.length); + + break; + case ATH12K_ACPI_DSM_FUNC_GEO_OFFSET: + if (obj->buffer.length != ATH12K_ACPI_DSM_GEO_OFFSET_DATA_SIZE) { + ath12k_warn(ab, "invalid ACPI GEO OFFSET data size: %d\n", + obj->buffer.length); + ret = -EINVAL; + goto out; + } + + memcpy(&ab->acpi.geo_offset_data, obj->buffer.pointer, + obj->buffer.length); + + break; + case ATH12K_ACPI_DSM_FUNC_INDEX_CCA: + if (obj->buffer.length != ATH12K_ACPI_DSM_CCA_DATA_SIZE) { + ath12k_warn(ab, "invalid ACPI DSM CCA data size: %d\n", + obj->buffer.length); + ret = -EINVAL; + goto out; + } + + memcpy(&ab->acpi.cca_data, obj->buffer.pointer, + obj->buffer.length); + + break; + case ATH12K_ACPI_DSM_FUNC_INDEX_BAND_EDGE: + if (obj->buffer.length != ATH12K_ACPI_DSM_BAND_EDGE_DATA_SIZE) { + ath12k_warn(ab, "invalid ACPI DSM band edge data size: %d\n", + obj->buffer.length); + ret = -EINVAL; + goto out; + } + + memcpy(&ab->acpi.band_edge_power, obj->buffer.pointer, + obj->buffer.length); + + break; + } + } else { + ath12k_warn(ab, "ACPI DSM method returned an unsupported object type: %d\n", + obj->type); + ret = -EINVAL; + goto out; + } + + ret = 0; + +out: + ACPI_FREE(obj); + return ret; +} + +static int ath12k_acpi_set_power_limit(struct ath12k_base *ab) +{ + const u8 *tas_sar_power_table = ab->acpi.tas_sar_power_table; + int ret; + + if (tas_sar_power_table[0] != ATH12K_ACPI_TAS_DATA_VERSION || + tas_sar_power_table[1] != ATH12K_ACPI_TAS_DATA_ENABLE) { + ath12k_warn(ab, "latest ACPI TAS data is invalid\n"); + return -EINVAL; + } + + ret = ath12k_wmi_set_bios_cmd(ab, WMI_BIOS_PARAM_TAS_DATA_TYPE, + tas_sar_power_table, + ATH12K_ACPI_DSM_TAS_DATA_SIZE); + if (ret) { + ath12k_warn(ab, "failed to send ACPI TAS data table: %d\n", ret); + return ret; + } + + return ret; +} + +static int ath12k_acpi_set_bios_sar_power(struct ath12k_base *ab) +{ + int ret; + + if (ab->acpi.bios_sar_data[0] != ATH12K_ACPI_POWER_LIMIT_VERSION || + ab->acpi.bios_sar_data[1] != ATH12K_ACPI_POWER_LIMIT_ENABLE_FLAG) { + ath12k_warn(ab, "invalid latest ACPI BIOS SAR data\n"); + return -EINVAL; + } + + ret = ath12k_wmi_set_bios_sar_cmd(ab, ab->acpi.bios_sar_data); + if (ret) { + ath12k_warn(ab, "failed to set ACPI BIOS SAR table: %d\n", ret); + return ret; + } + + return 0; +} + +static void ath12k_acpi_dsm_notify(acpi_handle handle, u32 event, void *data) +{ + int ret; + struct ath12k_base *ab = data; + + if (event == ATH12K_ACPI_NOTIFY_EVENT) { + ath12k_warn(ab, "unknown acpi notify %u\n", event); + return; + } + + if (!ab->acpi.acpi_tas_enable) { + ath12k_dbg(ab, ATH12K_DBG_BOOT, "acpi_tas_enable is false\n"); + return; + } + + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_TAS_DATA); + if (ret) { + ath12k_warn(ab, "failed to update ACPI TAS data table: %d\n", ret); + return; + } + + ret = ath12k_acpi_set_power_limit(ab); + if (ret) { + ath12k_warn(ab, "failed to set ACPI TAS power limit data: %d", ret); + return; + } + + if (!ab->acpi.acpi_bios_sar_enable) + return; + + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_BIOS_SAR); + if (ret) { + ath12k_warn(ab, "failed to update BIOS SAR: %d\n", ret); + return; + } + + ret = ath12k_acpi_set_bios_sar_power(ab); + if (ret) { + ath12k_warn(ab, "failed to set BIOS SAR power limit: %d\n", ret); + return; + } +} + +static int ath12k_acpi_set_bios_sar_params(struct ath12k_base *ab) +{ + int ret; + + ret = ath12k_wmi_set_bios_sar_cmd(ab, ab->acpi.bios_sar_data); + if (ret) { + ath12k_warn(ab, "failed to set ACPI BIOS SAR table: %d\n", ret); + return ret; + } + + ret = ath12k_wmi_set_bios_geo_cmd(ab, ab->acpi.geo_offset_data); + if (ret) { + ath12k_warn(ab, "failed to set ACPI BIOS GEO table: %d\n", ret); + return ret; + } + + return 0; +} + +static int ath12k_acpi_set_tas_params(struct ath12k_base *ab) +{ + int ret; + + ret = ath12k_wmi_set_bios_cmd(ab, WMI_BIOS_PARAM_TAS_CONFIG_TYPE, + ab->acpi.tas_cfg, + ATH12K_ACPI_DSM_TAS_CFG_SIZE); + if (ret) { + ath12k_warn(ab, "failed to send ACPI TAS config table parameter: %d\n", + ret); + return ret; + } + + ret = ath12k_wmi_set_bios_cmd(ab, WMI_BIOS_PARAM_TAS_DATA_TYPE, + ab->acpi.tas_sar_power_table, + ATH12K_ACPI_DSM_TAS_DATA_SIZE); + if (ret) { + ath12k_warn(ab, "failed to send ACPI TAS data table parameter: %d\n", + ret); + return ret; + } + + return 0; +} + +int ath12k_acpi_start(struct ath12k_base *ab) +{ + acpi_status status; + u8 *buf; + int ret; + + if (!ab->hw_params->acpi_guid) + /* not supported with this hardware */ + return 0; + + ab->acpi.acpi_tas_enable = false; + + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_SUPPORT_FUNCS); + if (ret) { + ath12k_dbg(ab, ATH12K_DBG_BOOT, "failed to get ACPI DSM data: %d\n", ret); + return ret; + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_TAS_CFG)) { + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_TAS_CFG); + if (ret) { + ath12k_warn(ab, "failed to get ACPI TAS config table: %d\n", ret); + return ret; + } + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_TAS_DATA)) { + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_TAS_DATA); + if (ret) { + ath12k_warn(ab, "failed to get ACPI TAS data table: %d\n", ret); + return ret; + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_TAS_CFG) && + ab->acpi.tas_sar_power_table[0] == ATH12K_ACPI_TAS_DATA_VERSION && + ab->acpi.tas_sar_power_table[1] == ATH12K_ACPI_TAS_DATA_ENABLE) + ab->acpi.acpi_tas_enable = true; + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_BIOS_SAR)) { + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_BIOS_SAR); + if (ret) { + ath12k_warn(ab, "failed to get ACPI bios sar data: %d\n", ret); + return ret; + } + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_GEO_OFFSET)) { + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_GEO_OFFSET); + if (ret) { + ath12k_warn(ab, "failed to get ACPI geo offset data: %d\n", ret); + return ret; + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_BIOS_SAR) && + ab->acpi.bios_sar_data[0] == ATH12K_ACPI_POWER_LIMIT_VERSION && + ab->acpi.bios_sar_data[1] == ATH12K_ACPI_POWER_LIMIT_ENABLE_FLAG && + !ab->acpi.acpi_tas_enable) + ab->acpi.acpi_bios_sar_enable = true; + } + + if (ab->acpi.acpi_tas_enable) { + ret = ath12k_acpi_set_tas_params(ab); + if (ret) { + ath12k_warn(ab, "failed to send ACPI parameters: %d\n", ret); + return ret; + } + } + + if (ab->acpi.acpi_bios_sar_enable) { + ret = ath12k_acpi_set_bios_sar_params(ab); + if (ret) + return ret; + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, ATH12K_ACPI_FUNC_BIT_CCA)) { + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_INDEX_CCA); + if (ret) { + ath12k_warn(ab, "failed to get ACPI DSM CCA threshold configuration: %d\n", + ret); + return ret; + } + + if (ab->acpi.cca_data[0] == ATH12K_ACPI_CCA_THR_VERSION && + ab->acpi.cca_data[ATH12K_ACPI_CCA_THR_OFFSET_DATA_OFFSET] == + ATH12K_ACPI_CCA_THR_ENABLE_FLAG) { + buf = ab->acpi.cca_data + ATH12K_ACPI_CCA_THR_OFFSET_DATA_OFFSET; + ret = ath12k_wmi_set_bios_cmd(ab, + WMI_BIOS_PARAM_CCA_THRESHOLD_TYPE, + buf, + ATH12K_ACPI_CCA_THR_OFFSET_LEN); + if (ret) { + ath12k_warn(ab, "failed to set ACPI DSM CCA threshold: %d\n", + ret); + return ret; + } + } + } + + if (ATH12K_ACPI_FUNC_BIT_VALID(ab->acpi, + ATH12K_ACPI_FUNC_BIT_BAND_EDGE_CHAN_POWER)) { + ret = ath12k_acpi_dsm_get_data(ab, ATH12K_ACPI_DSM_FUNC_INDEX_BAND_EDGE); + if (ret) { + ath12k_warn(ab, "failed to get ACPI DSM band edge channel power: %d\n", + ret); + return ret; + } + + if (ab->acpi.band_edge_power[0] == ATH12K_ACPI_BAND_EDGE_VERSION && + ab->acpi.band_edge_power[1] == ATH12K_ACPI_BAND_EDGE_ENABLE_FLAG) { + ret = ath12k_wmi_set_bios_cmd(ab, + WMI_BIOS_PARAM_TYPE_BANDEDGE, + ab->acpi.band_edge_power, + sizeof(ab->acpi.band_edge_power)); + if (ret) { + ath12k_warn(ab, + "failed to set ACPI DSM band edge channel power: %d\n", + ret); + return ret; + } + } + } + + status = acpi_install_notify_handler(ACPI_HANDLE(ab->dev), + ACPI_DEVICE_NOTIFY, + ath12k_acpi_dsm_notify, ab); + if (ACPI_FAILURE(status)) { + ath12k_warn(ab, "failed to install DSM notify callback: %d\n", status); + return -EIO; + } + + ab->acpi.started = true; + + return 0; +} + +void ath12k_acpi_stop(struct ath12k_base *ab) +{ + if (!ab->acpi.started) + return; + + acpi_remove_notify_handler(ACPI_HANDLE(ab->dev), + ACPI_DEVICE_NOTIFY, + ath12k_acpi_dsm_notify); +} |