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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 | * | |
51368bf7 | 8 | * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. |
1f3b0ff8 LE |
9 | * |
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. | |
13 | * | |
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. | |
18 | * | |
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, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
25 | * in the file called COPYING. | |
26 | * | |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
51368bf7 | 33 | * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. |
1f3b0ff8 LE |
34 | * All rights reserved. |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
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 | |
45 | * distribution. | |
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. | |
49 | * | |
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. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | #include "mvm.h" | |
64 | ||
65 | /* For counting bound interfaces */ | |
66 | struct iwl_mvm_active_iface_iterator_data { | |
67 | struct ieee80211_vif *ignore_vif; | |
68 | u8 sta_vif_ap_sta_id; | |
69 | enum iwl_sf_state sta_vif_state; | |
70 | int num_active_macs; | |
71 | }; | |
72 | ||
73 | /* | |
74 | * Count bound interfaces which are not p2p, besides data->ignore_vif. | |
75 | * data->station_vif will point to one bound vif of type station, if exists. | |
76 | */ | |
77 | static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac, | |
78 | struct ieee80211_vif *vif) | |
79 | { | |
80 | struct iwl_mvm_active_iface_iterator_data *data = _data; | |
81 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); | |
82 | ||
83 | if (vif == data->ignore_vif || !mvmvif->phy_ctxt || | |
84 | vif->type == NL80211_IFTYPE_P2P_DEVICE) | |
85 | return; | |
86 | ||
87 | data->num_active_macs++; | |
88 | ||
89 | if (vif->type == NL80211_IFTYPE_STATION) { | |
90 | data->sta_vif_ap_sta_id = mvmvif->ap_sta_id; | |
91 | if (vif->bss_conf.assoc) | |
92 | data->sta_vif_state = SF_FULL_ON; | |
93 | else | |
94 | data->sta_vif_state = SF_INIT_OFF; | |
95 | } | |
96 | } | |
97 | ||
98 | /* | |
99 | * Aging and idle timeouts for the different possible scenarios | |
100 | * in SF_FULL_ON state. | |
101 | */ | |
102 | static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { | |
103 | { | |
104 | cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER), | |
105 | cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER) | |
106 | }, | |
107 | { | |
108 | cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER), | |
109 | cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER) | |
110 | }, | |
111 | { | |
112 | cpu_to_le32(SF_MCAST_AGING_TIMER), | |
113 | cpu_to_le32(SF_MCAST_IDLE_TIMER) | |
114 | }, | |
115 | { | |
116 | cpu_to_le32(SF_BA_AGING_TIMER), | |
117 | cpu_to_le32(SF_BA_IDLE_TIMER) | |
118 | }, | |
119 | { | |
120 | cpu_to_le32(SF_TX_RE_AGING_TIMER), | |
121 | cpu_to_le32(SF_TX_RE_IDLE_TIMER) | |
122 | }, | |
123 | }; | |
124 | ||
125 | static void iwl_mvm_fill_sf_command(struct iwl_sf_cfg_cmd *sf_cmd, | |
126 | struct ieee80211_sta *sta) | |
127 | { | |
128 | int i, j, watermark; | |
129 | ||
130 | sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN); | |
131 | ||
132 | /* | |
133 | * If we are in association flow - check antenna configuration | |
134 | * capabilities of the AP station, and choose the watermark accordingly. | |
135 | */ | |
136 | if (sta) { | |
137 | if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) { | |
138 | switch (sta->rx_nss) { | |
139 | case 1: | |
140 | watermark = SF_W_MARK_SISO; | |
141 | break; | |
142 | case 2: | |
143 | watermark = SF_W_MARK_MIMO2; | |
144 | break; | |
145 | default: | |
146 | watermark = SF_W_MARK_MIMO3; | |
147 | break; | |
148 | } | |
149 | } else { | |
150 | watermark = SF_W_MARK_LEGACY; | |
151 | } | |
152 | /* default watermark value for unassociated mode. */ | |
153 | } else { | |
154 | watermark = SF_W_MARK_MIMO2; | |
155 | } | |
156 | sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark); | |
157 | ||
158 | for (i = 0; i < SF_NUM_SCENARIO; i++) { | |
159 | for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) { | |
160 | sf_cmd->long_delay_timeouts[i][j] = | |
161 | cpu_to_le32(SF_LONG_DELAY_AGING_TIMER); | |
162 | } | |
163 | } | |
164 | BUILD_BUG_ON(sizeof(sf_full_timeout) != | |
165 | sizeof(__le32) * SF_NUM_SCENARIO * SF_NUM_TIMEOUT_TYPES); | |
166 | ||
167 | memcpy(sf_cmd->full_on_timeouts, sf_full_timeout, | |
168 | sizeof(sf_full_timeout)); | |
169 | } | |
170 | ||
171 | static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id, | |
172 | enum iwl_sf_state new_state) | |
173 | { | |
174 | struct iwl_sf_cfg_cmd sf_cmd = { | |
175 | .state = new_state, | |
176 | }; | |
177 | struct ieee80211_sta *sta; | |
178 | int ret = 0; | |
179 | ||
180 | /* | |
181 | * If an associated AP sta changed its antenna configuration, the state | |
182 | * will remain FULL_ON but SF parameters need to be reconsidered. | |
183 | */ | |
184 | if (new_state != SF_FULL_ON && mvm->sf_state == new_state) | |
185 | return 0; | |
186 | ||
187 | switch (new_state) { | |
188 | case SF_UNINIT: | |
189 | break; | |
190 | case SF_FULL_ON: | |
191 | if (sta_id == IWL_MVM_STATION_COUNT) { | |
192 | IWL_ERR(mvm, | |
193 | "No station: Cannot switch SF to FULL_ON\n"); | |
194 | return -EINVAL; | |
195 | } | |
196 | rcu_read_lock(); | |
197 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
198 | if (IS_ERR_OR_NULL(sta)) { | |
199 | IWL_ERR(mvm, "Invalid station id\n"); | |
200 | rcu_read_unlock(); | |
201 | return -EINVAL; | |
202 | } | |
203 | iwl_mvm_fill_sf_command(&sf_cmd, sta); | |
204 | rcu_read_unlock(); | |
205 | break; | |
206 | case SF_INIT_OFF: | |
207 | iwl_mvm_fill_sf_command(&sf_cmd, NULL); | |
208 | break; | |
209 | default: | |
210 | WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n", | |
211 | new_state); | |
212 | return -EINVAL; | |
213 | } | |
214 | ||
215 | ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC, | |
216 | sizeof(sf_cmd), &sf_cmd); | |
217 | if (!ret) | |
218 | mvm->sf_state = new_state; | |
219 | ||
220 | return ret; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Update Smart fifo: | |
225 | * Count bound interfaces that are not to be removed, ignoring p2p devices, | |
226 | * and set new state accordingly. | |
227 | */ | |
228 | int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif, | |
229 | bool remove_vif) | |
230 | { | |
231 | enum iwl_sf_state new_state; | |
232 | u8 sta_id = IWL_MVM_STATION_COUNT; | |
233 | struct iwl_mvm_vif *mvmvif = NULL; | |
234 | struct iwl_mvm_active_iface_iterator_data data = { | |
235 | .ignore_vif = changed_vif, | |
236 | .sta_vif_state = SF_UNINIT, | |
237 | .sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT, | |
238 | }; | |
239 | ||
1f3b0ff8 LE |
240 | /* |
241 | * Ignore the call if we are in HW Restart flow, or if the handled | |
242 | * vif is a p2p device. | |
243 | */ | |
244 | if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || | |
245 | (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE)) | |
246 | return 0; | |
247 | ||
248 | ieee80211_iterate_active_interfaces_atomic(mvm->hw, | |
249 | IEEE80211_IFACE_ITER_NORMAL, | |
250 | iwl_mvm_bound_iface_iterator, | |
251 | &data); | |
252 | ||
253 | /* If changed_vif exists and is not to be removed, add to the count */ | |
254 | if (changed_vif && !remove_vif) | |
255 | data.num_active_macs++; | |
256 | ||
257 | switch (data.num_active_macs) { | |
258 | case 0: | |
259 | /* If there are no active macs - change state to SF_INIT_OFF */ | |
260 | new_state = SF_INIT_OFF; | |
261 | break; | |
262 | case 1: | |
263 | if (remove_vif) { | |
264 | /* The one active mac left is of type station | |
265 | * and we filled the relevant data during iteration | |
266 | */ | |
267 | new_state = data.sta_vif_state; | |
268 | sta_id = data.sta_vif_ap_sta_id; | |
269 | } else { | |
270 | if (WARN_ON(!changed_vif)) | |
271 | return -EINVAL; | |
272 | if (changed_vif->type != NL80211_IFTYPE_STATION) { | |
273 | new_state = SF_UNINIT; | |
0229cdaf JB |
274 | } else if (changed_vif->bss_conf.assoc && |
275 | changed_vif->bss_conf.dtim_period) { | |
1f3b0ff8 LE |
276 | mvmvif = iwl_mvm_vif_from_mac80211(changed_vif); |
277 | sta_id = mvmvif->ap_sta_id; | |
278 | new_state = SF_FULL_ON; | |
279 | } else { | |
280 | new_state = SF_INIT_OFF; | |
281 | } | |
282 | } | |
283 | break; | |
284 | default: | |
285 | /* If there are multiple active macs - change to SF_UNINIT */ | |
286 | new_state = SF_UNINIT; | |
287 | } | |
288 | return iwl_mvm_sf_config(mvm, sta_id, new_state); | |
289 | } |