iwlwifi: mvm: Add support for connection monitor offload
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / power.c
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1/******************************************************************************
2 *
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.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
9 *
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.
13 *
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.
18 *
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,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
410dc5aa 25 * in the file called COPYING.
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26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
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
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
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48 * from this software without specific prior written permission.
49 *
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.
61 *
62 *****************************************************************************/
63
64#include <linux/kernel.h>
65#include <linux/module.h>
66#include <linux/slab.h>
67#include <linux/init.h>
68
69#include <net/mac80211.h>
70
71#include "iwl-debug.h"
72#include "mvm.h"
73#include "iwl-modparams.h"
74#include "fw-api-power.h"
75
76#define POWER_KEEP_ALIVE_PERIOD_SEC 25
77
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78static int iwl_mvm_beacon_filter_send_cmd(struct iwl_mvm *mvm,
79 struct iwl_beacon_filter_cmd *cmd)
80{
81 int ret;
82
83 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_BEACON_FILTERING_CMD, CMD_SYNC,
84 sizeof(struct iwl_beacon_filter_cmd), cmd);
85
86 if (!ret) {
87 IWL_DEBUG_POWER(mvm, "ba_enable_beacon_abort is: %d\n",
88 cmd->ba_enable_beacon_abort);
89 IWL_DEBUG_POWER(mvm, "ba_escape_timer is: %d\n",
90 cmd->ba_escape_timer);
91 IWL_DEBUG_POWER(mvm, "bf_debug_flag is: %d\n",
92 cmd->bf_debug_flag);
93 IWL_DEBUG_POWER(mvm, "bf_enable_beacon_filter is: %d\n",
94 cmd->bf_enable_beacon_filter);
95 IWL_DEBUG_POWER(mvm, "bf_energy_delta is: %d\n",
96 cmd->bf_energy_delta);
97 IWL_DEBUG_POWER(mvm, "bf_escape_timer is: %d\n",
98 cmd->bf_escape_timer);
99 IWL_DEBUG_POWER(mvm, "bf_roaming_energy_delta is: %d\n",
100 cmd->bf_roaming_energy_delta);
101 IWL_DEBUG_POWER(mvm, "bf_roaming_state is: %d\n",
102 cmd->bf_roaming_state);
103 IWL_DEBUG_POWER(mvm, "bf_temperature_delta is: %d\n",
104 cmd->bf_temperature_delta);
105 }
106 return ret;
107}
108
109static int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
110 struct ieee80211_vif *vif, bool enable)
111{
112 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
113 struct iwl_beacon_filter_cmd cmd = {
114 IWL_BF_CMD_CONFIG_DEFAULTS,
115 .bf_enable_beacon_filter = 1,
116 .ba_enable_beacon_abort = enable,
117 };
118
119 if (!mvmvif->bf_enabled)
120 return 0;
121
122 return iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
123}
124
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125static void iwl_mvm_power_log(struct iwl_mvm *mvm,
126 struct iwl_powertable_cmd *cmd)
127{
128 IWL_DEBUG_POWER(mvm,
129 "Sending power table command for power level %d, flags = 0x%X\n",
130 iwlmvm_mod_params.power_scheme,
131 le16_to_cpu(cmd->flags));
132 IWL_DEBUG_POWER(mvm, "Keep alive = %u sec\n", cmd->keep_alive_seconds);
133
134 if (cmd->flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
135 IWL_DEBUG_POWER(mvm, "Rx timeout = %u usec\n",
136 le32_to_cpu(cmd->rx_data_timeout));
137 IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
138 le32_to_cpu(cmd->tx_data_timeout));
139 IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
140 cmd->lprx_rssi_threshold);
5b1dbfc3 141 if (cmd->flags & cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK))
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142 IWL_DEBUG_POWER(mvm, "DTIM periods to skip = %u\n",
143 le32_to_cpu(cmd->skip_dtim_periods));
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144 }
145}
146
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147void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
148 struct iwl_powertable_cmd *cmd)
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149{
150 struct ieee80211_hw *hw = mvm->hw;
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151 struct ieee80211_chanctx_conf *chanctx_conf;
152 struct ieee80211_channel *chan;
153 int dtimper, dtimper_msec;
154 int keep_alive;
155 bool radar_detect = false;
156
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157 /*
158 * Regardless of power management state the driver must set
159 * keep alive period. FW will use it for sending keep alive NDPs
160 * immediately after association.
161 */
162 cmd->keep_alive_seconds = POWER_KEEP_ALIVE_PERIOD_SEC;
163
ade50652 164 if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
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165 return;
166
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167 cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
168
169 if (!vif->bss_conf.ps)
170 return;
171
172 cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
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173
174 dtimper = hw->conf.ps_dtim_period ?: 1;
175
176 /* Check if radar detection is required on current channel */
177 rcu_read_lock();
178 chanctx_conf = rcu_dereference(vif->chanctx_conf);
179 WARN_ON(!chanctx_conf);
180 if (chanctx_conf) {
181 chan = chanctx_conf->def.chan;
182 radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
183 }
184 rcu_read_unlock();
185
186 /* Check skip over DTIM conditions */
187 if (!radar_detect && (dtimper <= 10) &&
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188 (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP ||
189 mvm->cur_ucode == IWL_UCODE_WOWLAN)) {
f4a3e2fe 190 cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
1bd2d175 191 cmd->skip_dtim_periods = cpu_to_le32(3);
5b1dbfc3 192 }
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193
194 /* Check that keep alive period is at least 3 * DTIM */
195 dtimper_msec = dtimper * vif->bss_conf.beacon_int;
196 keep_alive = max_t(int, 3 * dtimper_msec,
e16cf7ec 197 MSEC_PER_SEC * cmd->keep_alive_seconds);
8ca151b5 198 keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
83bdad52 199 cmd->keep_alive_seconds = keep_alive;
8ca151b5 200
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201 if (mvm->cur_ucode != IWL_UCODE_WOWLAN) {
202 cmd->rx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
203 cmd->tx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
204 } else {
205 cmd->rx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
206 cmd->tx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
207 }
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208}
209
210int iwl_mvm_power_update_mode(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
211{
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212 int ret;
213 bool ba_enable;
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214 struct iwl_powertable_cmd cmd = {};
215
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216 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
217 return 0;
218
f4a3e2fe 219 iwl_mvm_power_build_cmd(mvm, vif, &cmd);
3f0b2b3e 220 iwl_mvm_power_log(mvm, &cmd);
8ca151b5 221
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222 ret = iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
223 sizeof(cmd), &cmd);
224 if (ret)
225 return ret;
226
227 ba_enable = !!(cmd.flags &
228 cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK));
229
230 return iwl_mvm_update_beacon_abort(mvm, vif, ba_enable);
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231}
232
233int iwl_mvm_power_disable(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
234{
235 struct iwl_powertable_cmd cmd = {};
8ca151b5 236
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237 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
238 return 0;
239
ade50652 240 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
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241 cmd.flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
242
3f0b2b3e 243 iwl_mvm_power_log(mvm, &cmd);
8ca151b5 244
5360cfb2 245 return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
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246 sizeof(cmd), &cmd);
247}
7df15b1e 248
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249int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
250 struct ieee80211_vif *vif)
251{
252 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
253 struct iwl_beacon_filter_cmd cmd = {
071d4990 254 IWL_BF_CMD_CONFIG_DEFAULTS,
7df15b1e 255 .bf_enable_beacon_filter = 1,
7df15b1e 256 };
071d4990 257 int ret;
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258
259 if (mvmvif != mvm->bf_allowed_vif ||
260 vif->type != NL80211_IFTYPE_STATION || vif->p2p)
261 return 0;
262
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263 ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
264
265 if (!ret)
266 mvmvif->bf_enabled = true;
267
268 return ret;
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269}
270
271int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
272 struct ieee80211_vif *vif)
273{
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274 struct iwl_beacon_filter_cmd cmd = {};
275 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
276 int ret;
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277
278 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
279 return 0;
280
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281 ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
282
283 if (!ret)
284 mvmvif->bf_enabled = false;
285
286 return ret;
7df15b1e 287}
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