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) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67
68 #include <net/mac80211.h>
69 #include "fw-api.h"
70 #include "mvm.h"
71
72 #define QUOTA_100 IWL_MVM_MAX_QUOTA
73 #define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
74
75 struct iwl_mvm_quota_iterator_data {
76 int n_interfaces[MAX_BINDINGS];
77 int colors[MAX_BINDINGS];
78 int low_latency[MAX_BINDINGS];
79 #ifdef CONFIG_IWLWIFI_DEBUGFS
80 int dbgfs_min[MAX_BINDINGS];
81 #endif
82 int n_low_latency_bindings;
83 struct ieee80211_vif *disabled_vif;
84 };
85
iwl_mvm_quota_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)86 static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
87 struct ieee80211_vif *vif)
88 {
89 struct iwl_mvm_quota_iterator_data *data = _data;
90 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
91 u16 id;
92
93 /* skip disabled interfaces here immediately */
94 if (vif == data->disabled_vif)
95 return;
96
97 if (!mvmvif->phy_ctxt)
98 return;
99
100 /* currently, PHY ID == binding ID */
101 id = mvmvif->phy_ctxt->id;
102
103 /* need at least one binding per PHY */
104 BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
105
106 if (WARN_ON_ONCE(id >= MAX_BINDINGS))
107 return;
108
109 switch (vif->type) {
110 case NL80211_IFTYPE_STATION:
111 if (vif->bss_conf.assoc)
112 break;
113 return;
114 case NL80211_IFTYPE_AP:
115 case NL80211_IFTYPE_ADHOC:
116 if (mvmvif->ap_ibss_active)
117 break;
118 return;
119 case NL80211_IFTYPE_MONITOR:
120 if (mvmvif->monitor_active)
121 break;
122 return;
123 case NL80211_IFTYPE_P2P_DEVICE:
124 return;
125 default:
126 WARN_ON_ONCE(1);
127 return;
128 }
129
130 if (data->colors[id] < 0)
131 data->colors[id] = mvmvif->phy_ctxt->color;
132 else
133 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
134
135 data->n_interfaces[id]++;
136
137 #ifdef CONFIG_IWLWIFI_DEBUGFS
138 if (mvmvif->dbgfs_quota_min)
139 data->dbgfs_min[id] = max(data->dbgfs_min[id],
140 mvmvif->dbgfs_quota_min);
141 #endif
142
143 if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
144 data->n_low_latency_bindings++;
145 data->low_latency[id] = true;
146 }
147 }
148
iwl_mvm_adjust_quota_for_noa(struct iwl_mvm * mvm,struct iwl_time_quota_cmd * cmd)149 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
150 struct iwl_time_quota_cmd *cmd)
151 {
152 #ifdef CONFIG_NL80211_TESTMODE
153 struct iwl_mvm_vif *mvmvif;
154 int i, phy_id = -1, beacon_int = 0;
155
156 if (!mvm->noa_duration || !mvm->noa_vif)
157 return;
158
159 mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
160 if (!mvmvif->ap_ibss_active)
161 return;
162
163 phy_id = mvmvif->phy_ctxt->id;
164 beacon_int = mvm->noa_vif->bss_conf.beacon_int;
165
166 for (i = 0; i < MAX_BINDINGS; i++) {
167 struct iwl_time_quota_data *data =
168 iwl_mvm_quota_cmd_get_quota(mvm, cmd,
169 i);
170 u32 id_n_c = le32_to_cpu(data->id_and_color);
171 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
172 u32 quota = le32_to_cpu(data->quota);
173
174 if (id != phy_id)
175 continue;
176
177 quota *= (beacon_int - mvm->noa_duration);
178 quota /= beacon_int;
179
180 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
181 le32_to_cpu(data->quota), quota);
182
183 data->quota = cpu_to_le32(quota);
184 }
185 #endif
186 }
187
iwl_mvm_update_quotas(struct iwl_mvm * mvm,bool force_update,struct ieee80211_vif * disabled_vif)188 int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
189 bool force_update,
190 struct ieee80211_vif *disabled_vif)
191 {
192 struct iwl_time_quota_cmd cmd = {};
193 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
194 struct iwl_mvm_quota_iterator_data data = {
195 .n_interfaces = {},
196 .colors = { -1, -1, -1, -1 },
197 .disabled_vif = disabled_vif,
198 };
199 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
200 struct iwl_time_quota_data *qdata, *last_data;
201 bool send = false;
202
203 lockdep_assert_held(&mvm->mutex);
204
205 if (fw_has_capa(&mvm->fw->ucode_capa,
206 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
207 return 0;
208
209 /* update all upon completion */
210 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
211 return 0;
212
213 /* iterator data above must match */
214 BUILD_BUG_ON(MAX_BINDINGS != 4);
215
216 ieee80211_iterate_active_interfaces_atomic(
217 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
218 iwl_mvm_quota_iterator, &data);
219
220 /*
221 * The FW's scheduling session consists of
222 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
223 * equally between all the bindings that require quota
224 */
225 num_active_macs = 0;
226 for (i = 0; i < MAX_BINDINGS; i++) {
227 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
228 qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
229 num_active_macs += data.n_interfaces[i];
230 }
231
232 n_non_lowlat = num_active_macs;
233
234 if (data.n_low_latency_bindings == 1) {
235 for (i = 0; i < MAX_BINDINGS; i++) {
236 if (data.low_latency[i]) {
237 n_non_lowlat -= data.n_interfaces[i];
238 break;
239 }
240 }
241 }
242
243 if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
244 /*
245 * Reserve quota for the low latency binding in case that
246 * there are several data bindings but only a single
247 * low latency one. Split the rest of the quota equally
248 * between the other data interfaces.
249 */
250 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
251 quota_rem = QUOTA_100 - n_non_lowlat * quota -
252 QUOTA_LOWLAT_MIN;
253 IWL_DEBUG_QUOTA(mvm,
254 "quota: low-latency binding active, remaining quota per other binding: %d\n",
255 quota);
256 } else if (num_active_macs) {
257 /*
258 * There are 0 or more than 1 low latency bindings, or all the
259 * data interfaces belong to the single low latency binding.
260 * Split the quota equally between the data interfaces.
261 */
262 quota = QUOTA_100 / num_active_macs;
263 quota_rem = QUOTA_100 % num_active_macs;
264 IWL_DEBUG_QUOTA(mvm,
265 "quota: splitting evenly per binding: %d\n",
266 quota);
267 } else {
268 /* values don't really matter - won't be used */
269 quota = 0;
270 quota_rem = 0;
271 }
272
273 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
274 if (data.colors[i] < 0)
275 continue;
276
277 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx);
278
279 qdata->id_and_color =
280 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
281
282 if (data.n_interfaces[i] <= 0)
283 qdata->quota = cpu_to_le32(0);
284 #ifdef CONFIG_IWLWIFI_DEBUGFS
285 else if (data.dbgfs_min[i])
286 qdata->quota =
287 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100);
288 #endif
289 else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
290 data.low_latency[i])
291 /*
292 * There is more than one binding, but only one of the
293 * bindings is in low latency. For this case, allocate
294 * the minimal required quota for the low latency
295 * binding.
296 */
297 qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
298 else
299 qdata->quota =
300 cpu_to_le32(quota * data.n_interfaces[i]);
301
302 WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100,
303 "Binding=%d, quota=%u > max=%u\n",
304 idx, le32_to_cpu(qdata->quota), QUOTA_100);
305
306 qdata->max_duration = cpu_to_le32(0);
307
308 idx++;
309 }
310
311 /* Give the remainder of the session to the first data binding */
312 for (i = 0; i < MAX_BINDINGS; i++) {
313 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
314 if (le32_to_cpu(qdata->quota) != 0) {
315 le32_add_cpu(&qdata->quota, quota_rem);
316 IWL_DEBUG_QUOTA(mvm,
317 "quota: giving remainder of %d to binding %d\n",
318 quota_rem, i);
319 break;
320 }
321 }
322
323 iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
324
325 /* check that we have non-zero quota for all valid bindings */
326 for (i = 0; i < MAX_BINDINGS; i++) {
327 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
328 last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i);
329 if (qdata->id_and_color != last_data->id_and_color)
330 send = true;
331 if (qdata->max_duration != last_data->max_duration)
332 send = true;
333 if (abs((int)le32_to_cpu(qdata->quota) -
334 (int)le32_to_cpu(last_data->quota))
335 > IWL_MVM_QUOTA_THRESHOLD)
336 send = true;
337 if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID))
338 continue;
339 WARN_ONCE(qdata->quota == 0,
340 "zero quota on binding %d\n", i);
341 }
342
343 if (!send && !force_update) {
344 /* don't send a practically unchanged command, the firmware has
345 * to re-initialize a lot of state and that can have an adverse
346 * impact on it
347 */
348 return 0;
349 }
350
351 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
352 iwl_mvm_quota_cmd_size(mvm), &cmd);
353
354 if (err)
355 IWL_ERR(mvm, "Failed to send quota: %d\n", err);
356 else
357 mvm->last_quota_cmd = cmd;
358 return err;
359 }
360
