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) 2013 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
67 /* For counting bound interfaces */
68 struct iwl_mvm_active_iface_iterator_data {
69 struct ieee80211_vif *ignore_vif;
71 enum iwl_sf_state sta_vif_state;
76 * Count bound interfaces which are not p2p, besides data->ignore_vif.
77 * data->station_vif will point to one bound vif of type station, if exists.
79 static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
80 struct ieee80211_vif *vif)
82 struct iwl_mvm_active_iface_iterator_data *data = _data;
83 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
85 if (vif == data->ignore_vif || !mvmvif->phy_ctxt ||
86 vif->type == NL80211_IFTYPE_P2P_DEVICE)
89 data->num_active_macs++;
91 if (vif->type == NL80211_IFTYPE_STATION) {
92 data->sta_vif_ap_sta_id = mvmvif->ap_sta_id;
93 if (vif->bss_conf.assoc)
94 data->sta_vif_state = SF_FULL_ON;
96 data->sta_vif_state = SF_INIT_OFF;
101 * Aging and idle timeouts for the different possible scenarios
102 * in SF_FULL_ON state.
104 static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
106 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
107 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
110 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
111 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
114 cpu_to_le32(SF_MCAST_AGING_TIMER),
115 cpu_to_le32(SF_MCAST_IDLE_TIMER)
118 cpu_to_le32(SF_BA_AGING_TIMER),
119 cpu_to_le32(SF_BA_IDLE_TIMER)
122 cpu_to_le32(SF_TX_RE_AGING_TIMER),
123 cpu_to_le32(SF_TX_RE_IDLE_TIMER)
127 static void iwl_mvm_fill_sf_command(struct iwl_sf_cfg_cmd *sf_cmd,
128 struct ieee80211_sta *sta)
132 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
135 * If we are in association flow - check antenna configuration
136 * capabilities of the AP station, and choose the watermark accordingly.
139 if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) {
140 switch (sta->rx_nss) {
142 watermark = SF_W_MARK_SISO;
145 watermark = SF_W_MARK_MIMO2;
148 watermark = SF_W_MARK_MIMO3;
152 watermark = SF_W_MARK_LEGACY;
154 /* default watermark value for unassociated mode. */
156 watermark = SF_W_MARK_MIMO2;
158 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
160 for (i = 0; i < SF_NUM_SCENARIO; i++) {
161 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
162 sf_cmd->long_delay_timeouts[i][j] =
163 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
166 BUILD_BUG_ON(sizeof(sf_full_timeout) !=
167 sizeof(__le32) * SF_NUM_SCENARIO * SF_NUM_TIMEOUT_TYPES);
169 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
170 sizeof(sf_full_timeout));
173 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
174 enum iwl_sf_state new_state)
176 struct iwl_sf_cfg_cmd sf_cmd = {
177 .state = cpu_to_le32(new_state),
179 struct ieee80211_sta *sta;
183 * If an associated AP sta changed its antenna configuration, the state
184 * will remain FULL_ON but SF parameters need to be reconsidered.
186 if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
193 if (sta_id == IWL_MVM_STATION_COUNT) {
195 "No station: Cannot switch SF to FULL_ON\n");
199 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
200 if (IS_ERR_OR_NULL(sta)) {
201 IWL_ERR(mvm, "Invalid station id\n");
205 iwl_mvm_fill_sf_command(&sf_cmd, sta);
209 iwl_mvm_fill_sf_command(&sf_cmd, NULL);
212 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
217 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
218 sizeof(sf_cmd), &sf_cmd);
220 mvm->sf_state = new_state;
227 * Count bound interfaces that are not to be removed, ignoring p2p devices,
228 * and set new state accordingly.
230 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
233 enum iwl_sf_state new_state;
234 u8 sta_id = IWL_MVM_STATION_COUNT;
235 struct iwl_mvm_vif *mvmvif = NULL;
236 struct iwl_mvm_active_iface_iterator_data data = {
237 .ignore_vif = changed_vif,
238 .sta_vif_state = SF_UNINIT,
239 .sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT,
243 * Ignore the call if we are in HW Restart flow, or if the handled
244 * vif is a p2p device.
246 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
247 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
250 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
251 IEEE80211_IFACE_ITER_NORMAL,
252 iwl_mvm_bound_iface_iterator,
255 /* If changed_vif exists and is not to be removed, add to the count */
256 if (changed_vif && !remove_vif)
257 data.num_active_macs++;
259 switch (data.num_active_macs) {
261 /* If there are no active macs - change state to SF_INIT_OFF */
262 new_state = SF_INIT_OFF;
266 /* The one active mac left is of type station
267 * and we filled the relevant data during iteration
269 new_state = data.sta_vif_state;
270 sta_id = data.sta_vif_ap_sta_id;
272 if (WARN_ON(!changed_vif))
274 if (changed_vif->type != NL80211_IFTYPE_STATION) {
275 new_state = SF_UNINIT;
276 } else if (changed_vif->bss_conf.assoc &&
277 changed_vif->bss_conf.dtim_period) {
278 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
279 sta_id = mvmvif->ap_sta_id;
280 new_state = SF_FULL_ON;
282 new_state = SF_INIT_OFF;
287 /* If there are multiple active macs - change to SF_UNINIT */
288 new_state = SF_UNINIT;
290 return iwl_mvm_sf_config(mvm, sta_id, new_state);