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@@ -0,0 +1,319 @@
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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 - 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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+
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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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+
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+#include <net/mac80211.h>
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+
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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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+
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+#define POWER_KEEP_ALIVE_PERIOD_SEC 25
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+
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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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+
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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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+ if (cmd->flags & cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK))
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+ IWL_DEBUG_POWER(mvm, "DTIM periods to skip = %u\n",
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+ le32_to_cpu(cmd->skip_dtim_periods));
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+ if (cmd->flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
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+ IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
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+ le32_to_cpu(cmd->lprx_rssi_threshold));
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+ }
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+}
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+
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+static void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm,
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+ 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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+ struct iwl_mvm_vif *mvmvif __maybe_unused =
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+ iwl_mvm_vif_from_mac80211(vif);
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+
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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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+
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+ if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
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+ return;
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+
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+ cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
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+ if (!vif->bss_conf.assoc)
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+ cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
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+
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+#ifdef CONFIG_IWLWIFI_DEBUGFS
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
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+ mvmvif->dbgfs_pm.disable_power_off)
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+ cmd->flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
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+#endif
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+ if (!vif->bss_conf.ps)
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+ return;
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+
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+ cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
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+
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+ if (vif->bss_conf.beacon_rate &&
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+ (vif->bss_conf.beacon_rate->bitrate == 10 ||
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+ vif->bss_conf.beacon_rate->bitrate == 60)) {
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+ cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
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+ cmd->lprx_rssi_threshold =
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+ cpu_to_le32(POWER_LPRX_RSSI_THRESHOLD);
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+ }
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+
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+ dtimper = hw->conf.ps_dtim_period ?: 1;
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+
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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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+
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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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+ mvm->cur_ucode == IWL_UCODE_WOWLAN)) {
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+ cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
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+ cmd->skip_dtim_periods = cpu_to_le32(3);
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+ }
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+
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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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+
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+ if (mvm->cur_ucode != IWL_UCODE_WOWLAN) {
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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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+ } else {
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+ cmd->rx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
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+ cmd->tx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
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+ }
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+
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+#ifdef CONFIG_IWLWIFI_DEBUGFS
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_KEEP_ALIVE)
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+ cmd->keep_alive_seconds = mvmvif->dbgfs_pm.keep_alive_seconds;
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_OVER_DTIM) {
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+ if (mvmvif->dbgfs_pm.skip_over_dtim)
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+ cmd->flags |=
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+ cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
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+ else
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+ cmd->flags &=
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+ cpu_to_le16(~POWER_FLAGS_SKIP_OVER_DTIM_MSK);
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+ }
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_RX_DATA_TIMEOUT)
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+ cmd->rx_data_timeout =
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+ cpu_to_le32(mvmvif->dbgfs_pm.rx_data_timeout);
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_TX_DATA_TIMEOUT)
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+ cmd->tx_data_timeout =
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+ cpu_to_le32(mvmvif->dbgfs_pm.tx_data_timeout);
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS)
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+ cmd->skip_dtim_periods =
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+ cpu_to_le32(mvmvif->dbgfs_pm.skip_dtim_periods);
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_ENA) {
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+ if (mvmvif->dbgfs_pm.lprx_ena)
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+ cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
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+ else
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+ cmd->flags &= cpu_to_le16(~POWER_FLAGS_LPRX_ENA_MSK);
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+ }
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD)
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+ cmd->lprx_rssi_threshold =
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+ cpu_to_le32(mvmvif->dbgfs_pm.lprx_rssi_threshold);
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+#endif /* CONFIG_IWLWIFI_DEBUGFS */
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+}
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+
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+static int iwl_mvm_power_legacy_update_mode(struct iwl_mvm *mvm,
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+ struct ieee80211_vif *vif)
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+{
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+ int ret;
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+ bool ba_enable;
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+ struct iwl_powertable_cmd cmd = {};
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+
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+ if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
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+ return 0;
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+
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+ /*
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+ * TODO: The following vif_count verification is temporary condition.
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+ * Avoid power mode update if more than one interface is currently
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+ * active. Remove this condition when FW will support power management
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+ * on multiple MACs.
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+ */
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+ IWL_DEBUG_POWER(mvm, "Currently %d interfaces active\n",
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+ mvm->vif_count);
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+ if (mvm->vif_count > 1)
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+ return 0;
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+
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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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+
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+ ret = iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
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+ sizeof(cmd), &cmd);
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+ if (ret)
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+ return ret;
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+
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+ ba_enable = !!(cmd.flags &
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+ cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK));
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+
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+ return iwl_mvm_update_beacon_abort(mvm, vif, ba_enable);
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+}
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+
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+static int iwl_mvm_power_legacy_disable(struct iwl_mvm *mvm,
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+ struct ieee80211_vif *vif)
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+{
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+ struct iwl_powertable_cmd cmd = {};
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+ struct iwl_mvm_vif *mvmvif __maybe_unused =
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+ iwl_mvm_vif_from_mac80211(vif);
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+
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+ if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
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+ return 0;
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+
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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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+
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+#ifdef CONFIG_IWLWIFI_DEBUGFS
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+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
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+ mvmvif->dbgfs_pm.disable_power_off)
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+ cmd.flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
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+#endif
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+ iwl_mvm_power_log(mvm, &cmd);
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+
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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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+
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+#ifdef CONFIG_IWLWIFI_DEBUGFS
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+static int iwl_mvm_power_legacy_dbgfs_read(struct iwl_mvm *mvm,
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+ struct ieee80211_vif *vif, char *buf,
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+ int bufsz)
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+{
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+ struct iwl_powertable_cmd cmd = {};
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+ int pos = 0;
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+
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+ iwl_mvm_power_build_cmd(mvm, vif, &cmd);
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+
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+ pos += scnprintf(buf+pos, bufsz-pos, "disable_power_off = %d\n",
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+ (cmd.flags &
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+ cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK)) ?
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+ 0 : 1);
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+ pos += scnprintf(buf+pos, bufsz-pos, "skip_dtim_periods = %d\n",
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+ le32_to_cpu(cmd.skip_dtim_periods));
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+ pos += scnprintf(buf+pos, bufsz-pos, "power_scheme = %d\n",
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+ iwlmvm_mod_params.power_scheme);
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+ pos += scnprintf(buf+pos, bufsz-pos, "flags = 0x%x\n",
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+ le16_to_cpu(cmd.flags));
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+ pos += scnprintf(buf+pos, bufsz-pos, "keep_alive = %d\n",
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+ cmd.keep_alive_seconds);
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+
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+ if (cmd.flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
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+ pos += scnprintf(buf+pos, bufsz-pos, "skip_over_dtim = %d\n",
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+ (cmd.flags &
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+ cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK)) ?
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+ 1 : 0);
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+ pos += scnprintf(buf+pos, bufsz-pos, "rx_data_timeout = %d\n",
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+ le32_to_cpu(cmd.rx_data_timeout));
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+ pos += scnprintf(buf+pos, bufsz-pos, "tx_data_timeout = %d\n",
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+ le32_to_cpu(cmd.tx_data_timeout));
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+ if (cmd.flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
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+ pos += scnprintf(buf+pos, bufsz-pos,
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+ "lprx_rssi_threshold = %d\n",
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+ le32_to_cpu(cmd.lprx_rssi_threshold));
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+ }
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+ return pos;
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+}
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+#endif
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+
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+const struct iwl_mvm_power_ops pm_legacy_ops = {
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+ .power_update_mode = iwl_mvm_power_legacy_update_mode,
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+ .power_disable = iwl_mvm_power_legacy_disable,
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+#ifdef CONFIG_IWLWIFI_DEBUGFS
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+ .power_dbgfs_read = iwl_mvm_power_legacy_dbgfs_read,
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+#endif
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+};
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Alexander Bondar