404 lines
11 KiB
C
404 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Copyright (C) 2012-2014, 2018-2022 Intel Corporation
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* Copyright (C) 2013-2014 Intel Mobile Communications GmbH
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* Copyright (C) 2017 Intel Deutschland GmbH
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*/
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#include <net/mac80211.h>
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#include "fw-api.h"
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#include "mvm.h"
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/* Maps the driver specific channel width definition to the fw values */
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u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef)
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{
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switch (chandef->width) {
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case NL80211_CHAN_WIDTH_20_NOHT:
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case NL80211_CHAN_WIDTH_20:
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return PHY_VHT_CHANNEL_MODE20;
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case NL80211_CHAN_WIDTH_40:
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return PHY_VHT_CHANNEL_MODE40;
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case NL80211_CHAN_WIDTH_80:
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return PHY_VHT_CHANNEL_MODE80;
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case NL80211_CHAN_WIDTH_160:
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return PHY_VHT_CHANNEL_MODE160;
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default:
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WARN(1, "Invalid channel width=%u", chandef->width);
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return PHY_VHT_CHANNEL_MODE20;
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}
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}
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/*
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* Maps the driver specific control channel position (relative to the center
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* freq) definitions to the the fw values
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*/
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u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef)
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{
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switch (chandef->chan->center_freq - chandef->center_freq1) {
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case -70:
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return PHY_VHT_CTRL_POS_4_BELOW;
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case -50:
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return PHY_VHT_CTRL_POS_3_BELOW;
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case -30:
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return PHY_VHT_CTRL_POS_2_BELOW;
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case -10:
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return PHY_VHT_CTRL_POS_1_BELOW;
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case 10:
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return PHY_VHT_CTRL_POS_1_ABOVE;
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case 30:
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return PHY_VHT_CTRL_POS_2_ABOVE;
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case 50:
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return PHY_VHT_CTRL_POS_3_ABOVE;
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case 70:
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return PHY_VHT_CTRL_POS_4_ABOVE;
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default:
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WARN(1, "Invalid channel definition");
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fallthrough;
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case 0:
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/*
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* The FW is expected to check the control channel position only
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* when in HT/VHT and the channel width is not 20MHz. Return
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* this value as the default one.
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*/
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return PHY_VHT_CTRL_POS_1_BELOW;
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}
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}
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/*
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* Construct the generic fields of the PHY context command
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*/
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static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt,
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struct iwl_phy_context_cmd *cmd,
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u32 action)
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{
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cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id,
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ctxt->color));
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cmd->action = cpu_to_le32(action);
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}
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static void iwl_mvm_phy_ctxt_set_rxchain(struct iwl_mvm *mvm,
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struct iwl_mvm_phy_ctxt *ctxt,
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__le32 *rxchain_info,
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u8 chains_static,
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u8 chains_dynamic)
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{
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u8 active_cnt, idle_cnt;
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/* Set rx the chains */
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idle_cnt = chains_static;
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active_cnt = chains_dynamic;
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/* In scenarios where we only ever use a single-stream rates,
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* i.e. legacy 11b/g/a associations, single-stream APs or even
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* static SMPS, enable both chains to get diversity, improving
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* the case where we're far enough from the AP that attenuation
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* between the two antennas is sufficiently different to impact
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* performance.
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*/
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if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm, ctxt)) {
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idle_cnt = 2;
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active_cnt = 2;
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}
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/*
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* If the firmware requested it, then we know that it supports
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* getting zero for the values to indicate "use one, but pick
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* which one yourself", which means it can dynamically pick one
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* that e.g. has better RSSI.
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*/
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if (mvm->fw_static_smps_request && active_cnt == 1 && idle_cnt == 1) {
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idle_cnt = 0;
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active_cnt = 0;
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}
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*rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) <<
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PHY_RX_CHAIN_VALID_POS);
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*rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
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*rxchain_info |= cpu_to_le32(active_cnt <<
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PHY_RX_CHAIN_MIMO_CNT_POS);
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#ifdef CONFIG_IWLWIFI_DEBUGFS
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if (unlikely(mvm->dbgfs_rx_phyinfo))
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*rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
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#endif
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}
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/*
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* Add the phy configuration to the PHY context command
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*/
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static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm,
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struct iwl_mvm_phy_ctxt *ctxt,
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struct iwl_phy_context_cmd_v1 *cmd,
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struct cfg80211_chan_def *chandef,
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u8 chains_static, u8 chains_dynamic)
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{
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struct iwl_phy_context_cmd_tail *tail =
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iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci);
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/* Set the channel info data */
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iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);
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iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &tail->rxchain_info,
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chains_static, chains_dynamic);
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tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
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}
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/*
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* Add the phy configuration to the PHY context command
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*/
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static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
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struct iwl_mvm_phy_ctxt *ctxt,
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struct iwl_phy_context_cmd *cmd,
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struct cfg80211_chan_def *chandef,
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u8 chains_static, u8 chains_dynamic)
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{
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cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm->fw,
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chandef->chan->band));
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/* Set the channel info data */
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iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef);
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/* we only support RLC command version 2 */
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if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2)
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iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info,
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chains_static, chains_dynamic);
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}
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static int iwl_mvm_phy_send_rlc(struct iwl_mvm *mvm,
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struct iwl_mvm_phy_ctxt *ctxt,
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u8 chains_static, u8 chains_dynamic)
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{
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struct iwl_rlc_config_cmd cmd = {
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.phy_id = cpu_to_le32(ctxt->id),
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};
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if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2)
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return 0;
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BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE !=
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PHY_RX_CHAIN_DRIVER_FORCE_MSK);
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BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID !=
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PHY_RX_CHAIN_VALID_MSK);
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BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE !=
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PHY_RX_CHAIN_FORCE_SEL_MSK);
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BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO !=
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PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK);
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BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK);
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BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT !=
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PHY_RX_CHAIN_MIMO_CNT_MSK);
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iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info,
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chains_static, chains_dynamic);
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return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD,
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DATA_PATH_GROUP, 2),
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0, sizeof(cmd), &cmd);
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}
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/*
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* Send a command to apply the current phy configuration. The command is send
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* only if something in the configuration changed: in case that this is the
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* first time that the phy configuration is applied or in case that the phy
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* configuration changed from the previous apply.
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*/
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static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm,
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struct iwl_mvm_phy_ctxt *ctxt,
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struct cfg80211_chan_def *chandef,
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u8 chains_static, u8 chains_dynamic,
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u32 action)
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{
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int ret;
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int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1);
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if (ver == 3 || ver == 4) {
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struct iwl_phy_context_cmd cmd = {};
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/* Set the command header fields */
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iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action);
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/* Set the command data */
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iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef,
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chains_static,
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chains_dynamic);
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ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
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0, sizeof(cmd), &cmd);
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} else if (ver < 3) {
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struct iwl_phy_context_cmd_v1 cmd = {};
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u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm);
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/* Set the command header fields */
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iwl_mvm_phy_ctxt_cmd_hdr(ctxt,
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(struct iwl_phy_context_cmd *)&cmd,
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action);
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/* Set the command data */
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iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef,
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chains_static,
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chains_dynamic);
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ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD,
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0, len, &cmd);
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} else {
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IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver);
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return -EOPNOTSUPP;
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}
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if (ret) {
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IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret);
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return ret;
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}
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if (action != FW_CTXT_ACTION_REMOVE)
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return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
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chains_dynamic);
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return 0;
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}
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/*
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* Send a command to add a PHY context based on the current HW configuration.
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*/
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int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
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struct cfg80211_chan_def *chandef,
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u8 chains_static, u8 chains_dynamic)
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{
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WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
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ctxt->ref);
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lockdep_assert_held(&mvm->mutex);
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ctxt->channel = chandef->chan;
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ctxt->width = chandef->width;
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ctxt->center_freq1 = chandef->center_freq1;
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return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
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chains_static, chains_dynamic,
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FW_CTXT_ACTION_ADD);
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}
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/*
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* Update the number of references to the given PHY context. This is valid only
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* in case the PHY context was already created, i.e., its reference count > 0.
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*/
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void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
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{
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lockdep_assert_held(&mvm->mutex);
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ctxt->ref++;
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}
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/*
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* Send a command to modify the PHY context based on the current HW
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* configuration. Note that the function does not check that the configuration
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* changed.
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*/
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int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
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struct cfg80211_chan_def *chandef,
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u8 chains_static, u8 chains_dynamic)
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{
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enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY;
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lockdep_assert_held(&mvm->mutex);
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if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) >= 2 &&
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ctxt->channel == chandef->chan &&
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ctxt->width == chandef->width &&
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ctxt->center_freq1 == chandef->center_freq1)
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return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static,
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chains_dynamic);
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if (fw_has_capa(&mvm->fw->ucode_capa,
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IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) &&
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ctxt->channel->band != chandef->chan->band) {
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int ret;
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/* ... remove it here ...*/
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ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
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chains_static, chains_dynamic,
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FW_CTXT_ACTION_REMOVE);
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if (ret)
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return ret;
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/* ... and proceed to add it again */
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action = FW_CTXT_ACTION_ADD;
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}
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ctxt->channel = chandef->chan;
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ctxt->width = chandef->width;
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ctxt->center_freq1 = chandef->center_freq1;
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return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
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chains_static, chains_dynamic,
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action);
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}
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void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt)
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{
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lockdep_assert_held(&mvm->mutex);
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if (WARN_ON_ONCE(!ctxt))
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return;
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ctxt->ref--;
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/*
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* Move unused phy's to a default channel. When the phy is moved the,
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* fw will cleanup immediate quiet bit if it was previously set,
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* otherwise we might not be able to reuse this phy.
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*/
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if (ctxt->ref == 0) {
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struct ieee80211_channel *chan = NULL;
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struct cfg80211_chan_def chandef;
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struct ieee80211_supported_band *sband;
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enum nl80211_band band;
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int channel;
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for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
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sband = mvm->hw->wiphy->bands[band];
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if (!sband)
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continue;
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for (channel = 0; channel < sband->n_channels; channel++)
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if (!(sband->channels[channel].flags &
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IEEE80211_CHAN_DISABLED)) {
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chan = &sband->channels[channel];
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break;
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}
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if (chan)
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break;
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}
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if (WARN_ON(!chan))
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return;
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cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
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iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1);
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}
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}
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static void iwl_mvm_binding_iterator(void *_data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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unsigned long *data = _data;
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struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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if (!mvmvif->phy_ctxt)
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return;
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if (vif->type == NL80211_IFTYPE_STATION ||
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vif->type == NL80211_IFTYPE_AP)
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__set_bit(mvmvif->phy_ctxt->id, data);
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}
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int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm)
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{
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unsigned long phy_ctxt_counter = 0;
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ieee80211_iterate_active_interfaces_atomic(mvm->hw,
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IEEE80211_IFACE_ITER_NORMAL,
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iwl_mvm_binding_iterator,
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&phy_ctxt_counter);
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return hweight8(phy_ctxt_counter);
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}
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