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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) 2013 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright (C) 2018-2019 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) 2018-2019 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 */
65struct 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 */
76static 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 */
101static 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 */
129static 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
152static 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 ||
166 sta->vht_cap.vht_supported ||
167 sta->he_cap.has_he) {
168 switch (sta->rx_nss) {
169 case 1:
170 watermark = SF_W_MARK_SISO;
171 break;
172 case 2:
173 watermark = SF_W_MARK_MIMO2;
174 break;
175 default:
176 watermark = SF_W_MARK_MIMO3;
177 break;
178 }
179 } else {
180 watermark = SF_W_MARK_LEGACY;
181 }
182 /* default watermark value for unassociated mode. */
183 } else {
184 watermark = SF_W_MARK_MIMO2;
185 }
186 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
187
188 for (i = 0; i < SF_NUM_SCENARIO; i++) {
189 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
190 sf_cmd->long_delay_timeouts[i][j] =
191 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
192 }
193 }
194
195 if (sta) {
196 BUILD_BUG_ON(sizeof(sf_full_timeout) !=
197 sizeof(__le32) * SF_NUM_SCENARIO *
198 SF_NUM_TIMEOUT_TYPES);
199
200 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
201 sizeof(sf_full_timeout));
202 } else {
203 BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
204 sizeof(__le32) * SF_NUM_SCENARIO *
205 SF_NUM_TIMEOUT_TYPES);
206
207 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
208 sizeof(sf_full_timeout_def));
209 }
210
211}
212
213static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
214 enum iwl_sf_state new_state)
215{
216 struct iwl_sf_cfg_cmd sf_cmd = {
217 .state = cpu_to_le32(new_state),
218 };
219 struct ieee80211_sta *sta;
220 int ret = 0;
221
222 if (mvm->cfg->disable_dummy_notification)
223 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
224
225 /*
226 * If an associated AP sta changed its antenna configuration, the state
227 * will remain FULL_ON but SF parameters need to be reconsidered.
228 */
229 if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
230 return 0;
231
232 switch (new_state) {
233 case SF_UNINIT:
234 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
235 break;
236 case SF_FULL_ON:
237 if (sta_id == IWL_MVM_INVALID_STA) {
238 IWL_ERR(mvm,
239 "No station: Cannot switch SF to FULL_ON\n");
240 return -EINVAL;
241 }
242 rcu_read_lock();
243 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
244 if (IS_ERR_OR_NULL(sta)) {
245 IWL_ERR(mvm, "Invalid station id\n");
246 rcu_read_unlock();
247 return -EINVAL;
248 }
249 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
250 rcu_read_unlock();
251 break;
252 case SF_INIT_OFF:
253 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
254 break;
255 default:
256 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
257 new_state);
258 return -EINVAL;
259 }
260
261 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
262 sizeof(sf_cmd), &sf_cmd);
263 if (!ret)
264 mvm->sf_state = new_state;
265
266 return ret;
267}
268
269/*
270 * Update Smart fifo:
271 * Count bound interfaces that are not to be removed, ignoring p2p devices,
272 * and set new state accordingly.
273 */
274int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
275 bool remove_vif)
276{
277 enum iwl_sf_state new_state;
278 u8 sta_id = IWL_MVM_INVALID_STA;
279 struct iwl_mvm_vif *mvmvif = NULL;
280 struct iwl_mvm_active_iface_iterator_data data = {
281 .ignore_vif = changed_vif,
282 .sta_vif_state = SF_UNINIT,
283 .sta_vif_ap_sta_id = IWL_MVM_INVALID_STA,
284 };
285
286 /*
287 * Ignore the call if we are in HW Restart flow, or if the handled
288 * vif is a p2p device.
289 */
290 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
291 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
292 return 0;
293
294 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
295 IEEE80211_IFACE_ITER_NORMAL,
296 iwl_mvm_bound_iface_iterator,
297 &data);
298
299 /* If changed_vif exists and is not to be removed, add to the count */
300 if (changed_vif && !remove_vif)
301 data.num_active_macs++;
302
303 switch (data.num_active_macs) {
304 case 0:
305 /* If there are no active macs - change state to SF_INIT_OFF */
306 new_state = SF_INIT_OFF;
307 break;
308 case 1:
309 if (remove_vif) {
310 /* The one active mac left is of type station
311 * and we filled the relevant data during iteration
312 */
313 new_state = data.sta_vif_state;
314 sta_id = data.sta_vif_ap_sta_id;
315 } else {
316 if (WARN_ON(!changed_vif))
317 return -EINVAL;
318 if (changed_vif->type != NL80211_IFTYPE_STATION) {
319 new_state = SF_UNINIT;
320 } else if (changed_vif->bss_conf.assoc &&
321 changed_vif->bss_conf.dtim_period) {
322 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
323 sta_id = mvmvif->ap_sta_id;
324 new_state = SF_FULL_ON;
325 } else {
326 new_state = SF_INIT_OFF;
327 }
328 }
329 break;
330 default:
331 /* If there are multiple active macs - change to SF_UNINIT */
332 new_state = SF_UNINIT;
333 }
334 return iwl_mvm_sf_config(mvm, sta_id, new_state);
335}