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) 2013 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright (C) 2018 Intel Corporation
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called COPYING.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <linuxwifi@intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 * BSD LICENSE
29 *
30 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
31 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
32 * Copyright (C) 2018 Intel Corporation
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 *
39 * * Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * * Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in
43 * the documentation and/or other materials provided with the
44 * distribution.
45 * * Neither the name Intel Corporation nor the names of its
46 * contributors may be used to endorse or promote products derived
47 * from this software without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
60 *
61 *****************************************************************************/
62 #include "mvm.h"
63
64 /* For counting bound interfaces */
65 struct iwl_mvm_active_iface_iterator_data {
66 struct ieee80211_vif *ignore_vif;
67 u8 sta_vif_ap_sta_id;
68 enum iwl_sf_state sta_vif_state;
69 u32 num_active_macs;
70 };
71
72 /*
73 * Count bound interfaces which are not p2p, besides data->ignore_vif.
74 * data->station_vif will point to one bound vif of type station, if exists.
75 */
76 static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
77 struct ieee80211_vif *vif)
78 {
79 struct iwl_mvm_active_iface_iterator_data *data = _data;
80 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
81
82 if (vif == data->ignore_vif || !mvmvif->phy_ctxt ||
83 vif->type == NL80211_IFTYPE_P2P_DEVICE)
84 return;
85
86 data->num_active_macs++;
87
88 if (vif->type == NL80211_IFTYPE_STATION) {
89 data->sta_vif_ap_sta_id = mvmvif->ap_sta_id;
90 if (vif->bss_conf.assoc)
91 data->sta_vif_state = SF_FULL_ON;
92 else
93 data->sta_vif_state = SF_INIT_OFF;
94 }
95 }
96
97 /*
98 * Aging and idle timeouts for the different possible scenarios
99 * in default configuration
100 */
101 static const
102 __le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
103 {
104 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
105 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
106 },
107 {
108 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
109 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
110 },
111 {
112 cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
113 cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
114 },
115 {
116 cpu_to_le32(SF_BA_AGING_TIMER_DEF),
117 cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
118 },
119 {
120 cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
121 cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
122 },
123 };
124
125 /*
126 * Aging and idle timeouts for the different possible scenarios
127 * in single BSS MAC configuration.
128 */
129 static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
130 {
131 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
132 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
133 },
134 {
135 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
136 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
137 },
138 {
139 cpu_to_le32(SF_MCAST_AGING_TIMER),
140 cpu_to_le32(SF_MCAST_IDLE_TIMER)
141 },
142 {
143 cpu_to_le32(SF_BA_AGING_TIMER),
144 cpu_to_le32(SF_BA_IDLE_TIMER)
145 },
146 {
147 cpu_to_le32(SF_TX_RE_AGING_TIMER),
148 cpu_to_le32(SF_TX_RE_IDLE_TIMER)
149 },
150 };
151
152 static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
153 struct iwl_sf_cfg_cmd *sf_cmd,
154 struct ieee80211_sta *sta)
155 {
156 int i, j, watermark;
157
158 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
159
160 /*
161 * If we are in association flow - check antenna configuration
162 * capabilities of the AP station, and choose the watermark accordingly.
163 */
164 if (sta) {
165 if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) {
166 switch (sta->rx_nss) {
167 case 1:
168 watermark = SF_W_MARK_SISO;
169 break;
170 case 2:
171 watermark = SF_W_MARK_MIMO2;
172 break;
173 default:
174 watermark = SF_W_MARK_MIMO3;
175 break;
176 }
177 } else {
178 watermark = SF_W_MARK_LEGACY;
179 }
180 /* default watermark value for unassociated mode. */
181 } else {
182 watermark = SF_W_MARK_MIMO2;
183 }
184 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
185
186 for (i = 0; i < SF_NUM_SCENARIO; i++) {
187 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
188 sf_cmd->long_delay_timeouts[i][j] =
189 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
190 }
191 }
192
193 if (sta) {
194 BUILD_BUG_ON(sizeof(sf_full_timeout) !=
195 sizeof(__le32) * SF_NUM_SCENARIO *
196 SF_NUM_TIMEOUT_TYPES);
197
198 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
199 sizeof(sf_full_timeout));
200 } else {
201 BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
202 sizeof(__le32) * SF_NUM_SCENARIO *
203 SF_NUM_TIMEOUT_TYPES);
204
205 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
206 sizeof(sf_full_timeout_def));
207 }
208
209 }
210
211 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
212 enum iwl_sf_state new_state)
213 {
214 struct iwl_sf_cfg_cmd sf_cmd = {
215 .state = cpu_to_le32(new_state),
216 };
217 struct ieee80211_sta *sta;
218 int ret = 0;
219
220 if (mvm->cfg->disable_dummy_notification)
221 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
222
223 /*
224 * If an associated AP sta changed its antenna configuration, the state
225 * will remain FULL_ON but SF parameters need to be reconsidered.
226 */
227 if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
228 return 0;
229
230 switch (new_state) {
231 case SF_UNINIT:
232 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
233 break;
234 case SF_FULL_ON:
235 if (sta_id == IWL_MVM_INVALID_STA) {
236 IWL_ERR(mvm,
237 "No station: Cannot switch SF to FULL_ON\n");
238 return -EINVAL;
239 }
240 rcu_read_lock();
241 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
242 if (IS_ERR_OR_NULL(sta)) {
243 IWL_ERR(mvm, "Invalid station id\n");
244 rcu_read_unlock();
245 return -EINVAL;
246 }
247 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
248 rcu_read_unlock();
249 break;
250 case SF_INIT_OFF:
251 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
252 break;
253 default:
254 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
255 new_state);
256 return -EINVAL;
257 }
258
259 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
260 sizeof(sf_cmd), &sf_cmd);
261 if (!ret)
262 mvm->sf_state = new_state;
263
264 return ret;
265 }
266
267 /*
268 * Update Smart fifo:
269 * Count bound interfaces that are not to be removed, ignoring p2p devices,
270 * and set new state accordingly.
271 */
272 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
273 bool remove_vif)
274 {
275 enum iwl_sf_state new_state;
276 u8 sta_id = IWL_MVM_INVALID_STA;
277 struct iwl_mvm_vif *mvmvif = NULL;
278 struct iwl_mvm_active_iface_iterator_data data = {
279 .ignore_vif = changed_vif,
280 .sta_vif_state = SF_UNINIT,
281 .sta_vif_ap_sta_id = IWL_MVM_INVALID_STA,
282 };
283
284 /*
285 * Ignore the call if we are in HW Restart flow, or if the handled
286 * vif is a p2p device.
287 */
288 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
289 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
290 return 0;
291
292 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
293 IEEE80211_IFACE_ITER_NORMAL,
294 iwl_mvm_bound_iface_iterator,
295 &data);
296
297 /* If changed_vif exists and is not to be removed, add to the count */
298 if (changed_vif && !remove_vif)
299 data.num_active_macs++;
300
301 switch (data.num_active_macs) {
302 case 0:
303 /* If there are no active macs - change state to SF_INIT_OFF */
304 new_state = SF_INIT_OFF;
305 break;
306 case 1:
307 if (remove_vif) {
308 /* The one active mac left is of type station
309 * and we filled the relevant data during iteration
310 */
311 new_state = data.sta_vif_state;
312 sta_id = data.sta_vif_ap_sta_id;
313 } else {
314 if (WARN_ON(!changed_vif))
315 return -EINVAL;
316 if (changed_vif->type != NL80211_IFTYPE_STATION) {
317 new_state = SF_UNINIT;
318 } else if (changed_vif->bss_conf.assoc &&
319 changed_vif->bss_conf.dtim_period) {
320 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
321 sta_id = mvmvif->ap_sta_id;
322 new_state = SF_FULL_ON;
323 } else {
324 new_state = SF_INIT_OFF;
325 }
326 }
327 break;
328 default:
329 /* If there are multiple active macs - change to SF_UNINIT */
330 new_state = SF_UNINIT;
331 }
332 return iwl_mvm_sf_config(mvm, sta_id, new_state);
333 }