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path: root/drivers/net/wireless/iwlwifi/mvm/power_legacy.c
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/power_legacy.c')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/power_legacy.c319
1 files changed, 319 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/power_legacy.c b/drivers/net/wireless/iwlwifi/mvm/power_legacy.c
new file mode 100644
index 000000000000..2ce79bad5845
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/mvm/power_legacy.c
@@ -0,0 +1,319 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ * Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+
+#include <net/mac80211.h>
+
+#include "iwl-debug.h"
+#include "mvm.h"
+#include "iwl-modparams.h"
+#include "fw-api-power.h"
+
+#define POWER_KEEP_ALIVE_PERIOD_SEC 25
+
+static void iwl_mvm_power_log(struct iwl_mvm *mvm,
+ struct iwl_powertable_cmd *cmd)
+{
+ IWL_DEBUG_POWER(mvm,
+ "Sending power table command for power level %d, flags = 0x%X\n",
+ iwlmvm_mod_params.power_scheme,
+ le16_to_cpu(cmd->flags));
+ IWL_DEBUG_POWER(mvm, "Keep alive = %u sec\n", cmd->keep_alive_seconds);
+
+ if (cmd->flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
+ IWL_DEBUG_POWER(mvm, "Rx timeout = %u usec\n",
+ le32_to_cpu(cmd->rx_data_timeout));
+ IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
+ le32_to_cpu(cmd->tx_data_timeout));
+ if (cmd->flags & cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK))
+ IWL_DEBUG_POWER(mvm, "DTIM periods to skip = %u\n",
+ le32_to_cpu(cmd->skip_dtim_periods));
+ if (cmd->flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
+ IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
+ le32_to_cpu(cmd->lprx_rssi_threshold));
+ }
+}
+
+static void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif,
+ struct iwl_powertable_cmd *cmd)
+{
+ struct ieee80211_hw *hw = mvm->hw;
+ struct ieee80211_chanctx_conf *chanctx_conf;
+ struct ieee80211_channel *chan;
+ int dtimper, dtimper_msec;
+ int keep_alive;
+ bool radar_detect = false;
+ struct iwl_mvm_vif *mvmvif __maybe_unused =
+ iwl_mvm_vif_from_mac80211(vif);
+
+ /*
+ * Regardless of power management state the driver must set
+ * keep alive period. FW will use it for sending keep alive NDPs
+ * immediately after association.
+ */
+ cmd->keep_alive_seconds = POWER_KEEP_ALIVE_PERIOD_SEC;
+
+ if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
+ return;
+
+ cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
+ if (!vif->bss_conf.assoc)
+ cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
+ mvmvif->dbgfs_pm.disable_power_off)
+ cmd->flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
+#endif
+ if (!vif->bss_conf.ps)
+ return;
+
+ cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
+
+ if (vif->bss_conf.beacon_rate &&
+ (vif->bss_conf.beacon_rate->bitrate == 10 ||
+ vif->bss_conf.beacon_rate->bitrate == 60)) {
+ cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
+ cmd->lprx_rssi_threshold =
+ cpu_to_le32(POWER_LPRX_RSSI_THRESHOLD);
+ }
+
+ dtimper = hw->conf.ps_dtim_period ?: 1;
+
+ /* Check if radar detection is required on current channel */
+ rcu_read_lock();
+ chanctx_conf = rcu_dereference(vif->chanctx_conf);
+ WARN_ON(!chanctx_conf);
+ if (chanctx_conf) {
+ chan = chanctx_conf->def.chan;
+ radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
+ }
+ rcu_read_unlock();
+
+ /* Check skip over DTIM conditions */
+ if (!radar_detect && (dtimper <= 10) &&
+ (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP ||
+ mvm->cur_ucode == IWL_UCODE_WOWLAN)) {
+ cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
+ cmd->skip_dtim_periods = cpu_to_le32(3);
+ }
+
+ /* Check that keep alive period is at least 3 * DTIM */
+ dtimper_msec = dtimper * vif->bss_conf.beacon_int;
+ keep_alive = max_t(int, 3 * dtimper_msec,
+ MSEC_PER_SEC * cmd->keep_alive_seconds);
+ keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
+ cmd->keep_alive_seconds = keep_alive;
+
+ if (mvm->cur_ucode != IWL_UCODE_WOWLAN) {
+ cmd->rx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
+ cmd->tx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
+ } else {
+ cmd->rx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
+ cmd->tx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
+ }
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_KEEP_ALIVE)
+ cmd->keep_alive_seconds = mvmvif->dbgfs_pm.keep_alive_seconds;
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_OVER_DTIM) {
+ if (mvmvif->dbgfs_pm.skip_over_dtim)
+ cmd->flags |=
+ cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
+ else
+ cmd->flags &=
+ cpu_to_le16(~POWER_FLAGS_SKIP_OVER_DTIM_MSK);
+ }
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_RX_DATA_TIMEOUT)
+ cmd->rx_data_timeout =
+ cpu_to_le32(mvmvif->dbgfs_pm.rx_data_timeout);
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_TX_DATA_TIMEOUT)
+ cmd->tx_data_timeout =
+ cpu_to_le32(mvmvif->dbgfs_pm.tx_data_timeout);
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS)
+ cmd->skip_dtim_periods =
+ cpu_to_le32(mvmvif->dbgfs_pm.skip_dtim_periods);
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_ENA) {
+ if (mvmvif->dbgfs_pm.lprx_ena)
+ cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
+ else
+ cmd->flags &= cpu_to_le16(~POWER_FLAGS_LPRX_ENA_MSK);
+ }
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD)
+ cmd->lprx_rssi_threshold =
+ cpu_to_le32(mvmvif->dbgfs_pm.lprx_rssi_threshold);
+#endif /* CONFIG_IWLWIFI_DEBUGFS */
+}
+
+static int iwl_mvm_power_legacy_update_mode(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif)
+{
+ int ret;
+ bool ba_enable;
+ struct iwl_powertable_cmd cmd = {};
+
+ if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
+ return 0;
+
+ /*
+ * TODO: The following vif_count verification is temporary condition.
+ * Avoid power mode update if more than one interface is currently
+ * active. Remove this condition when FW will support power management
+ * on multiple MACs.
+ */
+ IWL_DEBUG_POWER(mvm, "Currently %d interfaces active\n",
+ mvm->vif_count);
+ if (mvm->vif_count > 1)
+ return 0;
+
+ iwl_mvm_power_build_cmd(mvm, vif, &cmd);
+ iwl_mvm_power_log(mvm, &cmd);
+
+ ret = iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
+ sizeof(cmd), &cmd);
+ if (ret)
+ return ret;
+
+ ba_enable = !!(cmd.flags &
+ cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK));
+
+ return iwl_mvm_update_beacon_abort(mvm, vif, ba_enable);
+}
+
+static int iwl_mvm_power_legacy_disable(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif)
+{
+ struct iwl_powertable_cmd cmd = {};
+ struct iwl_mvm_vif *mvmvif __maybe_unused =
+ iwl_mvm_vif_from_mac80211(vif);
+
+ if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
+ return 0;
+
+ if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
+ cmd.flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+ if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
+ mvmvif->dbgfs_pm.disable_power_off)
+ cmd.flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
+#endif
+ iwl_mvm_power_log(mvm, &cmd);
+
+ return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
+ sizeof(cmd), &cmd);
+}
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+static int iwl_mvm_power_legacy_dbgfs_read(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif, char *buf,
+ int bufsz)
+{
+ struct iwl_powertable_cmd cmd = {};
+ int pos = 0;
+
+ iwl_mvm_power_build_cmd(mvm, vif, &cmd);
+
+ pos += scnprintf(buf+pos, bufsz-pos, "disable_power_off = %d\n",
+ (cmd.flags &
+ cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK)) ?
+ 0 : 1);
+ pos += scnprintf(buf+pos, bufsz-pos, "skip_dtim_periods = %d\n",
+ le32_to_cpu(cmd.skip_dtim_periods));
+ pos += scnprintf(buf+pos, bufsz-pos, "power_scheme = %d\n",
+ iwlmvm_mod_params.power_scheme);
+ pos += scnprintf(buf+pos, bufsz-pos, "flags = 0x%x\n",
+ le16_to_cpu(cmd.flags));
+ pos += scnprintf(buf+pos, bufsz-pos, "keep_alive = %d\n",
+ cmd.keep_alive_seconds);
+
+ if (cmd.flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
+ pos += scnprintf(buf+pos, bufsz-pos, "skip_over_dtim = %d\n",
+ (cmd.flags &
+ cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK)) ?
+ 1 : 0);
+ pos += scnprintf(buf+pos, bufsz-pos, "rx_data_timeout = %d\n",
+ le32_to_cpu(cmd.rx_data_timeout));
+ pos += scnprintf(buf+pos, bufsz-pos, "tx_data_timeout = %d\n",
+ le32_to_cpu(cmd.tx_data_timeout));
+ if (cmd.flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
+ pos += scnprintf(buf+pos, bufsz-pos,
+ "lprx_rssi_threshold = %d\n",
+ le32_to_cpu(cmd.lprx_rssi_threshold));
+ }
+ return pos;
+}
+#endif
+
+const struct iwl_mvm_power_ops pm_legacy_ops = {
+ .power_update_mode = iwl_mvm_power_legacy_update_mode,
+ .power_disable = iwl_mvm_power_legacy_disable,
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+ .power_dbgfs_read = iwl_mvm_power_legacy_dbgfs_read,
+#endif
+};