181 lines
6.2 KiB
C
181 lines
6.2 KiB
C
/******************************************************************************
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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 - 2013 Intel Corporation. All rights reserved.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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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 <ilw@linux.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 - 2013 Intel Corporation. All rights reserved.
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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 <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <net/mac80211.h>
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#include "iwl-debug.h"
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#include "mvm.h"
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#include "iwl-modparams.h"
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#include "fw-api-power.h"
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#define POWER_KEEP_ALIVE_PERIOD_SEC 25
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static void iwl_mvm_power_log(struct iwl_mvm *mvm,
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struct iwl_powertable_cmd *cmd)
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{
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IWL_DEBUG_POWER(mvm,
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"Sending power table command for power level %d, flags = 0x%X\n",
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iwlmvm_mod_params.power_scheme,
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le16_to_cpu(cmd->flags));
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IWL_DEBUG_POWER(mvm, "Keep alive = %u sec\n", cmd->keep_alive_seconds);
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if (cmd->flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
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IWL_DEBUG_POWER(mvm, "Rx timeout = %u usec\n",
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le32_to_cpu(cmd->rx_data_timeout));
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IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
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le32_to_cpu(cmd->tx_data_timeout));
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IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
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cmd->lprx_rssi_threshold);
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}
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}
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void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
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struct iwl_powertable_cmd *cmd)
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{
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struct ieee80211_hw *hw = mvm->hw;
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struct ieee80211_chanctx_conf *chanctx_conf;
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struct ieee80211_channel *chan;
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int dtimper, dtimper_msec;
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int keep_alive;
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bool radar_detect = false;
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/*
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* Regardless of power management state the driver must set
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* keep alive period. FW will use it for sending keep alive NDPs
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* immediately after association.
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*/
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cmd->keep_alive_seconds = POWER_KEEP_ALIVE_PERIOD_SEC;
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if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
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return;
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cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
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if (!vif->bss_conf.ps)
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return;
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cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
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dtimper = hw->conf.ps_dtim_period ?: 1;
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/* Check if radar detection is required on current channel */
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rcu_read_lock();
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chanctx_conf = rcu_dereference(vif->chanctx_conf);
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WARN_ON(!chanctx_conf);
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if (chanctx_conf) {
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chan = chanctx_conf->def.chan;
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radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
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}
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rcu_read_unlock();
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/* Check skip over DTIM conditions */
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if (!radar_detect && (dtimper <= 10) &&
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(iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP))
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cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
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/* Check that keep alive period is at least 3 * DTIM */
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dtimper_msec = dtimper * vif->bss_conf.beacon_int;
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keep_alive = max_t(int, 3 * dtimper_msec,
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MSEC_PER_SEC * cmd->keep_alive_seconds);
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keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
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cmd->keep_alive_seconds = keep_alive;
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cmd->rx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
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cmd->tx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
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}
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int iwl_mvm_power_update_mode(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
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struct iwl_powertable_cmd cmd = {};
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if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
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return 0;
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iwl_mvm_power_build_cmd(mvm, vif, &cmd);
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iwl_mvm_power_log(mvm, &cmd);
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return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
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sizeof(cmd), &cmd);
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}
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int iwl_mvm_power_disable(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
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struct iwl_powertable_cmd cmd = {};
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if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
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return 0;
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if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
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cmd.flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
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iwl_mvm_power_log(mvm, &cmd);
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return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
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sizeof(cmd), &cmd);
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}
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