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path: root/drivers/net/wireless/ath/ath12k/acpi.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath12k/acpi.c')
-rw-r--r--drivers/net/wireless/ath/ath12k/acpi.c396
1 files changed, 396 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 0000000000..0555d35aab
--- /dev/null
+++ b/drivers/net/wireless/ath/ath12k/acpi.c
@@ -0,0 +1,396 @@
+// 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);
+
+ memset(&ab->acpi, 0, sizeof(ab->acpi));
+}