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_mvm_power_log(struct iwl_mvm
*mvm
,
79 struct iwl_powertable_cmd
*cmd
)
82 "Sending power table command for power level %d, flags = 0x%X\n",
83 iwlmvm_mod_params
.power_scheme
,
84 le16_to_cpu(cmd
->flags
));
85 IWL_DEBUG_POWER(mvm
, "Keep alive = %u sec\n", cmd
->keep_alive_seconds
);
87 if (cmd
->flags
& cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK
)) {
88 IWL_DEBUG_POWER(mvm
, "Rx timeout = %u usec\n",
89 le32_to_cpu(cmd
->rx_data_timeout
));
90 IWL_DEBUG_POWER(mvm
, "Tx timeout = %u usec\n",
91 le32_to_cpu(cmd
->tx_data_timeout
));
92 IWL_DEBUG_POWER(mvm
, "LP RX RSSI threshold = %u\n",
93 cmd
->lprx_rssi_threshold
);
97 void iwl_mvm_power_build_cmd(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
98 struct iwl_powertable_cmd
*cmd
)
100 struct ieee80211_hw
*hw
= mvm
->hw
;
101 struct ieee80211_chanctx_conf
*chanctx_conf
;
102 struct ieee80211_channel
*chan
;
103 int dtimper
, dtimper_msec
;
105 bool radar_detect
= false;
108 * Regardless of power management state the driver must set
109 * keep alive period. FW will use it for sending keep alive NDPs
110 * immediately after association.
112 cmd
->keep_alive_seconds
= POWER_KEEP_ALIVE_PERIOD_SEC
;
114 if (iwlmvm_mod_params
.power_scheme
== IWL_POWER_SCHEME_CAM
)
117 cmd
->flags
|= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK
);
119 if (!vif
->bss_conf
.ps
)
122 cmd
->flags
|= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK
);
124 dtimper
= hw
->conf
.ps_dtim_period
?: 1;
126 /* Check if radar detection is required on current channel */
128 chanctx_conf
= rcu_dereference(vif
->chanctx_conf
);
129 WARN_ON(!chanctx_conf
);
131 chan
= chanctx_conf
->def
.chan
;
132 radar_detect
= chan
->flags
& IEEE80211_CHAN_RADAR
;
136 /* Check skip over DTIM conditions */
137 if (!radar_detect
&& (dtimper
<= 10) &&
138 (iwlmvm_mod_params
.power_scheme
== IWL_POWER_SCHEME_LP
))
139 cmd
->flags
|= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK
);
141 /* Check that keep alive period is at least 3 * DTIM */
142 dtimper_msec
= dtimper
* vif
->bss_conf
.beacon_int
;
143 keep_alive
= max_t(int, 3 * dtimper_msec
,
144 MSEC_PER_SEC
* cmd
->keep_alive_seconds
);
145 keep_alive
= DIV_ROUND_UP(keep_alive
, MSEC_PER_SEC
);
146 cmd
->keep_alive_seconds
= keep_alive
;
148 cmd
->rx_data_timeout
= cpu_to_le32(100 * USEC_PER_MSEC
);
149 cmd
->tx_data_timeout
= cpu_to_le32(100 * USEC_PER_MSEC
);
152 int iwl_mvm_power_update_mode(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
154 struct iwl_powertable_cmd cmd
= {};
156 if (vif
->type
!= NL80211_IFTYPE_STATION
|| vif
->p2p
)
159 iwl_mvm_power_build_cmd(mvm
, vif
, &cmd
);
160 iwl_mvm_power_log(mvm
, &cmd
);
162 return iwl_mvm_send_cmd_pdu(mvm
, POWER_TABLE_CMD
, CMD_SYNC
,
166 int iwl_mvm_power_disable(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
)
168 struct iwl_powertable_cmd cmd
= {};
170 if (vif
->type
!= NL80211_IFTYPE_STATION
|| vif
->p2p
)
173 if (iwlmvm_mod_params
.power_scheme
!= IWL_POWER_SCHEME_CAM
)
174 cmd
.flags
|= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK
);
176 iwl_mvm_power_log(mvm
, &cmd
);
178 return iwl_mvm_send_cmd_pdu(mvm
, POWER_TABLE_CMD
, CMD_ASYNC
,