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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2013-2014, 2018-2019, 2022-2023 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 */
6#include "mvm.h"
7
8/* For counting bound interfaces */
9struct iwl_mvm_active_iface_iterator_data {
10 struct ieee80211_vif *ignore_vif;
11 struct ieee80211_sta *sta_vif_ap_sta;
12 enum iwl_sf_state sta_vif_state;
13 u32 num_active_macs;
14};
15
16/*
17 * Count bound interfaces which are not p2p, besides data->ignore_vif.
18 * data->station_vif will point to one bound vif of type station, if exists.
19 */
20static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
21 struct ieee80211_vif *vif)
22{
23 struct iwl_mvm_active_iface_iterator_data *data = _data;
24 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
25
26 if (vif == data->ignore_vif || !mvmvif->deflink.phy_ctxt ||
27 vif->type == NL80211_IFTYPE_P2P_DEVICE)
28 return;
29
30 data->num_active_macs++;
31
32 if (vif->type == NL80211_IFTYPE_STATION) {
33 data->sta_vif_ap_sta = mvmvif->ap_sta;
34 if (vif->cfg.assoc)
35 data->sta_vif_state = SF_FULL_ON;
36 else
37 data->sta_vif_state = SF_INIT_OFF;
38 }
39}
40
41/*
42 * Aging and idle timeouts for the different possible scenarios
43 * in default configuration
44 */
45static const
46__le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
47 {
48 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
49 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
50 },
51 {
52 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
53 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
54 },
55 {
56 cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
57 cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
58 },
59 {
60 cpu_to_le32(SF_BA_AGING_TIMER_DEF),
61 cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
62 },
63 {
64 cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
65 cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
66 },
67};
68
69/*
70 * Aging and idle timeouts for the different possible scenarios
71 * in single BSS MAC configuration.
72 */
73static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
74 {
75 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
76 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
77 },
78 {
79 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
80 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
81 },
82 {
83 cpu_to_le32(SF_MCAST_AGING_TIMER),
84 cpu_to_le32(SF_MCAST_IDLE_TIMER)
85 },
86 {
87 cpu_to_le32(SF_BA_AGING_TIMER),
88 cpu_to_le32(SF_BA_IDLE_TIMER)
89 },
90 {
91 cpu_to_le32(SF_TX_RE_AGING_TIMER),
92 cpu_to_le32(SF_TX_RE_IDLE_TIMER)
93 },
94};
95
96static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
97 struct iwl_sf_cfg_cmd *sf_cmd,
98 struct ieee80211_sta *sta)
99{
100 int i, j, watermark;
101 u8 max_rx_nss = 0;
102 bool is_legacy = true;
103 struct ieee80211_link_sta *link_sta;
104 unsigned int link_id;
105
106 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
107
108 /*
109 * If we are in association flow - check antenna configuration
110 * capabilities of the AP station, and choose the watermark accordingly.
111 */
112 if (sta) {
113 /* find the maximal NSS number among all links (if relevant) */
114 rcu_read_lock();
115 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
116 link_sta = rcu_dereference(sta->link[link_id]);
117 if (!link_sta)
118 continue;
119
120 if (link_sta->ht_cap.ht_supported ||
121 link_sta->vht_cap.vht_supported ||
122 link_sta->eht_cap.has_eht ||
123 link_sta->he_cap.has_he) {
124 is_legacy = false;
125 max_rx_nss = max(max_rx_nss, link_sta->rx_nss);
126 }
127 }
128 rcu_read_unlock();
129
130 if (!is_legacy) {
131 switch (max_rx_nss) {
132 case 1:
133 watermark = SF_W_MARK_SISO;
134 break;
135 case 2:
136 watermark = SF_W_MARK_MIMO2;
137 break;
138 default:
139 watermark = SF_W_MARK_MIMO3;
140 break;
141 }
142 } else {
143 watermark = SF_W_MARK_LEGACY;
144 }
145 /* default watermark value for unassociated mode. */
146 } else {
147 watermark = SF_W_MARK_MIMO2;
148 }
149 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
150
151 for (i = 0; i < SF_NUM_SCENARIO; i++) {
152 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
153 sf_cmd->long_delay_timeouts[i][j] =
154 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
155 }
156 }
157
158 if (sta) {
159 BUILD_BUG_ON(sizeof(sf_full_timeout) !=
160 sizeof(__le32) * SF_NUM_SCENARIO *
161 SF_NUM_TIMEOUT_TYPES);
162
163 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
164 sizeof(sf_full_timeout));
165 } else {
166 BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
167 sizeof(__le32) * SF_NUM_SCENARIO *
168 SF_NUM_TIMEOUT_TYPES);
169
170 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
171 sizeof(sf_full_timeout_def));
172 }
173}
174
175static int iwl_mvm_sf_config(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
176 enum iwl_sf_state new_state)
177{
178 struct iwl_sf_cfg_cmd sf_cmd = {
179 .state = cpu_to_le32(new_state),
180 };
181 int ret = 0;
182
183 /*
184 * If an associated AP sta changed its antenna configuration, the state
185 * will remain FULL_ON but SF parameters need to be reconsidered.
186 */
187 if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
188 return 0;
189
190 switch (new_state) {
191 case SF_UNINIT:
192 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
193 break;
194 case SF_FULL_ON:
195 if (!sta) {
196 IWL_ERR(mvm,
197 "No station: Cannot switch SF to FULL_ON\n");
198 return -EINVAL;
199 }
200 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
201 break;
202 case SF_INIT_OFF:
203 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
204 break;
205 default:
206 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
207 new_state);
208 return -EINVAL;
209 }
210
211 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
212 sizeof(sf_cmd), &sf_cmd);
213 if (!ret)
214 mvm->sf_state = new_state;
215
216 return ret;
217}
218
219/*
220 * Update Smart fifo:
221 * Count bound interfaces that are not to be removed, ignoring p2p devices,
222 * and set new state accordingly.
223 */
224int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
225 bool remove_vif)
226{
227 enum iwl_sf_state new_state;
228 struct iwl_mvm_vif *mvmvif = NULL;
229 struct iwl_mvm_active_iface_iterator_data data = {
230 .ignore_vif = changed_vif,
231 .sta_vif_state = SF_UNINIT,
232 };
233 struct ieee80211_sta *sta = NULL;
234
235 /*
236 * Ignore the call if we are in HW Restart flow, or if the handled
237 * vif is a p2p device.
238 */
239 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
240 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
241 return 0;
242
243 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
244 IEEE80211_IFACE_ITER_NORMAL,
245 iwl_mvm_bound_iface_iterator,
246 &data);
247
248 /* If changed_vif exists and is not to be removed, add to the count */
249 if (changed_vif && !remove_vif)
250 data.num_active_macs++;
251
252 switch (data.num_active_macs) {
253 case 0:
254 /* If there are no active macs - change state to SF_INIT_OFF */
255 new_state = SF_INIT_OFF;
256 break;
257 case 1:
258 if (remove_vif) {
259 /* The one active mac left is of type station
260 * and we filled the relevant data during iteration
261 */
262 new_state = data.sta_vif_state;
263 sta = data.sta_vif_ap_sta;
264 } else {
265 if (WARN_ON(!changed_vif))
266 return -EINVAL;
267 if (changed_vif->type != NL80211_IFTYPE_STATION) {
268 new_state = SF_UNINIT;
269 } else if (changed_vif->cfg.assoc &&
270 changed_vif->bss_conf.dtim_period) {
271 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
272 sta = mvmvif->ap_sta;
273 new_state = SF_FULL_ON;
274 } else {
275 new_state = SF_INIT_OFF;
276 }
277 }
278 break;
279 default:
280 /* If there are multiple active macs - change to SF_UNINIT */
281 new_state = SF_UNINIT;
282 }
283
284 return iwl_mvm_sf_config(mvm, sta, new_state);
285}