327 lines
10 KiB
C
327 lines
10 KiB
C
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/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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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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* Copyright(c) 2018 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <linuxwifi@intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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* Copyright(c) 2018 Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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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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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, u32 apply_time)
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{
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memset(cmd, 0, sizeof(struct iwl_phy_context_cmd));
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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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cmd->apply_time = cpu_to_le32(apply_time);
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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_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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u8 active_cnt, idle_cnt;
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/* Set the channel info data */
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cmd->ci.band = (chandef->chan->band == NL80211_BAND_2GHZ ?
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PHY_BAND_24 : PHY_BAND_5);
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cmd->ci.channel = chandef->chan->hw_value;
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cmd->ci.width = iwl_mvm_get_channel_width(chandef);
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cmd->ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef);
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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)) {
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idle_cnt = 2;
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active_cnt = 2;
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}
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cmd->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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cmd->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
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cmd->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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cmd->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
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#endif
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cmd->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
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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, u32 apply_time)
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{
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struct iwl_phy_context_cmd cmd;
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int ret;
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/* Set the command header fields */
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iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time);
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/* Set the command data */
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iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef,
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chains_static, chains_dynamic);
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ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 0,
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sizeof(struct iwl_phy_context_cmd),
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&cmd);
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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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/*
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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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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, 0);
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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 (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, 0);
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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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return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef,
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chains_static, chains_dynamic,
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action, 0);
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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;
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struct cfg80211_chan_def chandef;
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chan = &mvm->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[0];
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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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