regulatory.c

// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
 * Copyright (C) 2024-2025 Intel Corporation
 */

#include <linux/dmi.h>

#include "fw/regulatory.h"
#include "fw/acpi.h"
#include "fw/uefi.h"

#include "regulatory.h"
#include "mld.h"
#include "hcmd.h"

void iwl_mld_get_bios_tables(struct iwl_mld *mld)
{
	int ret;

	iwl_acpi_get_guid_lock_status(&mld->fwrt);

	ret = iwl_bios_get_ppag_table(&mld->fwrt);
	if (ret < 0) {
		IWL_DEBUG_RADIO(mld,
				"PPAG BIOS table invalid or unavailable. (%d)\n",
				ret);
	}

	ret = iwl_bios_get_wrds_table(&mld->fwrt);
	if (ret < 0) {
		IWL_DEBUG_RADIO(mld,
				"WRDS SAR BIOS table invalid or unavailable. (%d)\n",
				ret);

		/* If not available, don't fail and don't bother with EWRD and
		 * WGDS
		 */

		if (!iwl_bios_get_wgds_table(&mld->fwrt)) {
			/* If basic SAR is not available, we check for WGDS,
			 * which should *not* be available either. If it is
			 * available, issue an error, because we can't use SAR
			 * Geo without basic SAR.
			 */
			IWL_ERR(mld, "BIOS contains WGDS but no WRDS\n");
		}

	} else {
		ret = iwl_bios_get_ewrd_table(&mld->fwrt);
		/* If EWRD is not available, we can still use
		 * WRDS, so don't fail.
		 */
		if (ret < 0)
			IWL_DEBUG_RADIO(mld,
					"EWRD SAR BIOS table invalid or unavailable. (%d)\n",
					ret);

		ret = iwl_bios_get_wgds_table(&mld->fwrt);
		if (ret < 0)
			IWL_DEBUG_RADIO(mld,
					"Geo SAR BIOS table invalid or unavailable. (%d)\n",
					ret);
		/* we don't fail if the table is not available */
	}

	iwl_uefi_get_uats_table(mld->trans, &mld->fwrt);

	iwl_bios_get_phy_filters(&mld->fwrt);
}

static int iwl_mld_geo_sar_init(struct iwl_mld *mld)
{
	u32 cmd_id = WIDE_ID(PHY_OPS_GROUP, PER_CHAIN_LIMIT_OFFSET_CMD);
	/* Only set to South Korea if the table revision is 1 */
	__le32 sk = cpu_to_le32(mld->fwrt.geo_rev == 1 ? 1 : 0);
	union iwl_geo_tx_power_profiles_cmd cmd = {
		.v5.ops = cpu_to_le32(IWL_PER_CHAIN_OFFSET_SET_TABLES),
		.v5.table_revision = sk,
	};
	int ret;

	ret = iwl_sar_geo_fill_table(&mld->fwrt, &cmd.v5.table[0][0],
				     ARRAY_SIZE(cmd.v5.table[0]),
				     BIOS_GEO_MAX_PROFILE_NUM);

	/* It is a valid scenario to not support SAR, or miss wgds table,
	 * but in that case there is no need to send the command.
	 */
	if (ret)
		return 0;

	return iwl_mld_send_cmd_pdu(mld, cmd_id, &cmd, sizeof(cmd.v5));
}

int iwl_mld_config_sar_profile(struct iwl_mld *mld, int prof_a, int prof_b)
{
	u32 cmd_id = REDUCE_TX_POWER_CMD;
	struct iwl_dev_tx_power_cmd cmd = {
		.common.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_CHAINS),
		.v10.flags = cpu_to_le32(mld->fwrt.reduced_power_flags),
	};
	int ret;

	/* TODO: CDB - support IWL_NUM_CHAIN_TABLES_V2 */
	ret = iwl_sar_fill_profile(&mld->fwrt, &cmd.v10.per_chain[0][0][0],
				   IWL_NUM_CHAIN_TABLES, IWL_NUM_SUB_BANDS_V2,
				   prof_a, prof_b);
	/* return on error or if the profile is disabled (positive number) */
	if (ret)
		return ret;

	return iwl_mld_send_cmd_pdu(mld, cmd_id, &cmd,
				    sizeof(cmd.common) + sizeof(cmd.v10));
}

int iwl_mld_init_sar(struct iwl_mld *mld)
{
	int chain_a_prof = 1;
	int chain_b_prof = 1;
	int ret;

	/* If no profile was chosen by the user yet, choose profile 1 (WRDS) as
	 * default for both chains
	 */
	if (mld->fwrt.sar_chain_a_profile && mld->fwrt.sar_chain_b_profile) {
		chain_a_prof = mld->fwrt.sar_chain_a_profile;
		chain_b_prof = mld->fwrt.sar_chain_b_profile;
	}

	ret = iwl_mld_config_sar_profile(mld, chain_a_prof, chain_b_prof);
	if (ret < 0)
		return ret;

	if (ret)
		return 0;

	return iwl_mld_geo_sar_init(mld);
}

int iwl_mld_init_sgom(struct iwl_mld *mld)
{
	int ret;
	struct iwl_host_cmd cmd = {
		.id = WIDE_ID(REGULATORY_AND_NVM_GROUP,
			      SAR_OFFSET_MAPPING_TABLE_CMD),
		.data[0] = &mld->fwrt.sgom_table,
		.len[0] =  sizeof(mld->fwrt.sgom_table),
		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
	};

	if (!mld->fwrt.sgom_enabled) {
		IWL_DEBUG_RADIO(mld, "SGOM table is disabled\n");
		return 0;
	}

	ret = iwl_mld_send_cmd(mld, &cmd);
	if (ret)
		IWL_ERR(mld,
			"failed to send SAR_OFFSET_MAPPING_CMD (%d)\n", ret);

	return ret;
}

static int iwl_mld_ppag_send_cmd(struct iwl_mld *mld)
{
	union iwl_ppag_table_cmd cmd = {};
	int ret, len;

	ret = iwl_fill_ppag_table(&mld->fwrt, &cmd, &len);
	/* Not supporting PPAG table is a valid scenario */
	if (ret < 0)
		return 0;

	IWL_DEBUG_RADIO(mld, "Sending PER_PLATFORM_ANT_GAIN_CMD\n");
	ret = iwl_mld_send_cmd_pdu(mld, WIDE_ID(PHY_OPS_GROUP,
						PER_PLATFORM_ANT_GAIN_CMD),
				   &cmd, len);
	if (ret < 0)
		IWL_ERR(mld, "failed to send PER_PLATFORM_ANT_GAIN_CMD (%d)\n",
			ret);

	return ret;
}

int iwl_mld_init_ppag(struct iwl_mld *mld)
{
	/* no need to read the table, done in INIT stage */

	if (!(iwl_is_ppag_approved(&mld->fwrt)))
		return 0;

	return iwl_mld_ppag_send_cmd(mld);
}

void iwl_mld_configure_lari(struct iwl_mld *mld)
{
	struct iwl_fw_runtime *fwrt = &mld->fwrt;
	struct iwl_lari_config_change_cmd cmd = {
		.config_bitmap = iwl_get_lari_config_bitmap(fwrt),
	};
	bool has_raw_dsm_capa = fw_has_capa(&fwrt->fw->ucode_capa,
					    IWL_UCODE_TLV_CAPA_FW_ACCEPTS_RAW_DSM_TABLE);
	int ret;
	u32 value;

	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_11AX_ENABLEMENT, &value);
	if (!ret) {
		if (!has_raw_dsm_capa)
			value &= DSM_11AX_ALLOW_BITMAP;
		cmd.oem_11ax_allow_bitmap = cpu_to_le32(value);
	}

	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ENABLE_UNII4_CHAN, &value);
	if (!ret) {
		if (!has_raw_dsm_capa)
			value &= DSM_UNII4_ALLOW_BITMAP;
		cmd.oem_unii4_allow_bitmap = cpu_to_le32(value);
	}

	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ACTIVATE_CHANNEL, &value);
	if (!ret) {
		if (!has_raw_dsm_capa)
			value &= CHAN_STATE_ACTIVE_BITMAP_CMD_V12;
		cmd.chan_state_active_bitmap = cpu_to_le32(value);
	}

	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ENABLE_6E, &value);
	if (!ret)
		cmd.oem_uhb_allow_bitmap = cpu_to_le32(value);

	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_FORCE_DISABLE_CHANNELS, &value);
	if (!ret) {
		if (!has_raw_dsm_capa)
			value &= DSM_FORCE_DISABLE_CHANNELS_ALLOWED_BITMAP;
		cmd.force_disable_channels_bitmap = cpu_to_le32(value);
	}

	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ENERGY_DETECTION_THRESHOLD,
			       &value);
	if (!ret) {
		if (!has_raw_dsm_capa)
			value &= DSM_EDT_ALLOWED_BITMAP;
		cmd.edt_bitmap = cpu_to_le32(value);
	}

	ret = iwl_bios_get_wbem(fwrt, &value);
	if (!ret)
		cmd.oem_320mhz_allow_bitmap = cpu_to_le32(value);

	ret = iwl_bios_get_dsm(fwrt, DSM_FUNC_ENABLE_11BE, &value);
	if (!ret)
		cmd.oem_11be_allow_bitmap = cpu_to_le32(value);

	if (!cmd.config_bitmap &&
	    !cmd.oem_uhb_allow_bitmap &&
	    !cmd.oem_11ax_allow_bitmap &&
	    !cmd.oem_unii4_allow_bitmap &&
	    !cmd.chan_state_active_bitmap &&
	    !cmd.force_disable_channels_bitmap &&
	    !cmd.edt_bitmap &&
	    !cmd.oem_320mhz_allow_bitmap &&
	    !cmd.oem_11be_allow_bitmap)
		return;

	IWL_DEBUG_RADIO(mld,
			"sending LARI_CONFIG_CHANGE, config_bitmap=0x%x, oem_11ax_allow_bitmap=0x%x\n",
			le32_to_cpu(cmd.config_bitmap),
			le32_to_cpu(cmd.oem_11ax_allow_bitmap));
	IWL_DEBUG_RADIO(mld,
			"sending LARI_CONFIG_CHANGE, oem_unii4_allow_bitmap=0x%x, chan_state_active_bitmap=0x%x\n",
			le32_to_cpu(cmd.oem_unii4_allow_bitmap),
			le32_to_cpu(cmd.chan_state_active_bitmap));
	IWL_DEBUG_RADIO(mld,
			"sending LARI_CONFIG_CHANGE, oem_uhb_allow_bitmap=0x%x, force_disable_channels_bitmap=0x%x\n",
			le32_to_cpu(cmd.oem_uhb_allow_bitmap),
			le32_to_cpu(cmd.force_disable_channels_bitmap));
	IWL_DEBUG_RADIO(mld,
			"sending LARI_CONFIG_CHANGE, edt_bitmap=0x%x, oem_320mhz_allow_bitmap=0x%x\n",
			le32_to_cpu(cmd.edt_bitmap),
			le32_to_cpu(cmd.oem_320mhz_allow_bitmap));
	IWL_DEBUG_RADIO(mld,
			"sending LARI_CONFIG_CHANGE, oem_11be_allow_bitmap=0x%x\n",
			le32_to_cpu(cmd.oem_11be_allow_bitmap));

	ret = iwl_mld_send_cmd_pdu(mld, WIDE_ID(REGULATORY_AND_NVM_GROUP,
						LARI_CONFIG_CHANGE), &cmd);
	if (ret)
		IWL_DEBUG_RADIO(mld,
				"Failed to send LARI_CONFIG_CHANGE (%d)\n",
				ret);
}

void iwl_mld_init_uats(struct iwl_mld *mld)
{
	int ret;
	struct iwl_host_cmd cmd = {
		.id = WIDE_ID(REGULATORY_AND_NVM_GROUP,
			      MCC_ALLOWED_AP_TYPE_CMD),
		.data[0] = &mld->fwrt.uats_table,
		.len[0] =  sizeof(mld->fwrt.uats_table),
		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
	};

	if (!mld->fwrt.uats_valid)
		return;

	ret = iwl_mld_send_cmd(mld, &cmd);
	if (ret)
		IWL_ERR(mld, "failed to send MCC_ALLOWED_AP_TYPE_CMD (%d)\n",
			ret);
}

void iwl_mld_init_tas(struct iwl_mld *mld)
{
	int ret;
	struct iwl_tas_data data = {};
	struct iwl_tas_config_cmd cmd = {};
	u32 cmd_id = WIDE_ID(REGULATORY_AND_NVM_GROUP, TAS_CONFIG);

	BUILD_BUG_ON(ARRAY_SIZE(data.block_list_array) !=
		     IWL_WTAS_BLACK_LIST_MAX);
	BUILD_BUG_ON(ARRAY_SIZE(cmd.block_list_array) !=
		     IWL_WTAS_BLACK_LIST_MAX);

	if (!fw_has_capa(&mld->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TAS_CFG)) {
		IWL_DEBUG_RADIO(mld, "TAS not enabled in FW\n");
		return;
	}

	ret = iwl_bios_get_tas_table(&mld->fwrt, &data);
	if (ret < 0) {
		IWL_DEBUG_RADIO(mld,
				"TAS table invalid or unavailable. (%d)\n",
				ret);
		return;
	}

	if (!iwl_is_tas_approved()) {
		IWL_DEBUG_RADIO(mld,
				"System vendor '%s' is not in the approved list, disabling TAS in US and Canada.\n",
				dmi_get_system_info(DMI_SYS_VENDOR) ?: "<unknown>");
		if ((!iwl_add_mcc_to_tas_block_list(data.block_list_array,
						    &data.block_list_size,
						    IWL_MCC_US)) ||
		    (!iwl_add_mcc_to_tas_block_list(data.block_list_array,
						    &data.block_list_size,
						    IWL_MCC_CANADA))) {
			IWL_DEBUG_RADIO(mld,
					"Unable to add US/Canada to TAS block list, disabling TAS\n");
			return;
		}
	} else {
		IWL_DEBUG_RADIO(mld,
				"System vendor '%s' is in the approved list.\n",
				dmi_get_system_info(DMI_SYS_VENDOR) ?: "<unknown>");
	}

	cmd.block_list_size = cpu_to_le16(data.block_list_size);
	for (u8 i = 0; i < data.block_list_size; i++)
		cmd.block_list_array[i] =
			cpu_to_le16(data.block_list_array[i]);
	cmd.tas_config_info.table_source = data.table_source;
	cmd.tas_config_info.table_revision = data.table_revision;
	cmd.tas_config_info.value = cpu_to_le32(data.tas_selection);

	ret = iwl_mld_send_cmd_pdu(mld, cmd_id, &cmd);
	if (ret)
		IWL_DEBUG_RADIO(mld, "failed to send TAS_CONFIG (%d)\n", ret);
}