1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62 *****************************************************************************/
64 #include <linux/kernel.h>
65 #include <linux/module.h>
66 #include <linux/slab.h>
67 #include <linux/init.h>
69 #include <net/mac80211.h>
71 #include "iwl-debug.h"
73 #include "iwl-modparams.h"
74 #include "fw-api-power.h"
76 #define POWER_KEEP_ALIVE_PERIOD_SEC 25
78 static void iwl_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
79 struct iwl_powertable_cmd *cmd)
81 struct ieee80211_hw *hw = mvm->hw;
82 struct ieee80211_chanctx_conf *chanctx_conf;
83 struct ieee80211_channel *chan;
84 int dtimper, dtimper_msec;
86 bool radar_detect = false;
88 if ((!vif->bss_conf.ps) ||
89 (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM))
92 cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK |
93 POWER_FLAGS_POWER_SAVE_ENA_MSK);
95 dtimper = hw->conf.ps_dtim_period ?: 1;
97 /* Check if radar detection is required on current channel */
99 chanctx_conf = rcu_dereference(vif->chanctx_conf);
100 WARN_ON(!chanctx_conf);
102 chan = chanctx_conf->def.chan;
103 radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
107 /* Check skip over DTIM conditions */
108 if (!radar_detect && (dtimper <= 10) &&
109 (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP))
110 cmd->flags |= cpu_to_le16(POWER_FLAGS_SLEEP_OVER_DTIM_MSK);
112 /* Check that keep alive period is at least 3 * DTIM */
113 dtimper_msec = dtimper * vif->bss_conf.beacon_int;
114 keep_alive = max_t(int, 3 * dtimper_msec,
115 MSEC_PER_SEC * POWER_KEEP_ALIVE_PERIOD_SEC);
116 keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
118 cmd->keep_alive_seconds = keep_alive;
120 if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP) {
121 /* TODO: Also for D3 (device sleep / WoWLAN) */
122 cmd->rx_data_timeout = cpu_to_le32(10);
123 cmd->tx_data_timeout = cpu_to_le32(10);
125 cmd->rx_data_timeout = cpu_to_le32(50);
126 cmd->tx_data_timeout = cpu_to_le32(50);
130 int iwl_mvm_power_update_mode(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
132 struct iwl_powertable_cmd cmd = {};
134 if (!iwlwifi_mod_params.power_save) {
135 IWL_DEBUG_POWER(mvm, "Power management is not allowed\n");
139 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
142 iwl_power_build_cmd(mvm, vif, &cmd);
145 "Sending power table command for power level %d, flags = 0x%X\n",
146 iwlmvm_mod_params.power_scheme, le16_to_cpu(cmd.flags));
148 if (cmd.flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
149 IWL_DEBUG_POWER(mvm, "Keep alive = %u sec\n",
150 cmd.keep_alive_seconds);
151 IWL_DEBUG_POWER(mvm, "Rx timeout = %u usec\n",
152 le32_to_cpu(cmd.rx_data_timeout));
153 IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
154 le32_to_cpu(cmd.tx_data_timeout));
155 IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
156 cmd.lprx_rssi_threshold);
159 return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
163 int iwl_mvm_power_disable(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
165 struct iwl_powertable_cmd cmd = {};
167 if (!iwlwifi_mod_params.power_save) {
168 IWL_DEBUG_POWER(mvm, "Power management is not allowed\n");
172 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
176 "Sending power table command power level %d, flags = 0x%X\n",
177 iwlmvm_mod_params.power_scheme, le16_to_cpu(cmd.flags));
179 return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
183 #ifdef CONFIG_IWLWIFI_DEBUGFS
184 void iwl_power_get_params(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
185 struct iwl_powertable_cmd *cmd)
187 iwl_power_build_cmd(mvm, vif, cmd);
189 #endif /* CONFIG_IWLWIFI_DEBUGFS */