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 * 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) 2012 - 2014 Intel Corporation. All rights reserved.
31 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
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
63 #include <net/mac80211.h>
64 #include "fw-api.h"
65 #include "mvm.h"
66
67 #define QUOTA_100 IWL_MVM_MAX_QUOTA
68 #define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
69
70 struct iwl_mvm_quota_iterator_data {
71 int n_interfaces[MAX_BINDINGS];
72 int colors[MAX_BINDINGS];
73 int low_latency[MAX_BINDINGS];
74 #ifdef CONFIG_IWLWIFI_DEBUGFS
75 int dbgfs_min[MAX_BINDINGS];
76 #endif
77 int n_low_latency_bindings;
78 struct ieee80211_vif *disabled_vif;
79 };
80
81 static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
82 struct ieee80211_vif *vif)
83 {
84 struct iwl_mvm_quota_iterator_data *data = _data;
85 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
86 u16 id;
87
88 /* skip disabled interfaces here immediately */
89 if (vif == data->disabled_vif)
90 return;
91
92 if (!mvmvif->phy_ctxt)
93 return;
94
95 /* currently, PHY ID == binding ID */
96 id = mvmvif->phy_ctxt->id;
97
98 /* need at least one binding per PHY */
99 BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
100
101 if (WARN_ON_ONCE(id >= MAX_BINDINGS))
102 return;
103
104 switch (vif->type) {
105 case NL80211_IFTYPE_STATION:
106 if (vif->bss_conf.assoc)
107 break;
108 return;
109 case NL80211_IFTYPE_AP:
110 case NL80211_IFTYPE_ADHOC:
111 if (mvmvif->ap_ibss_active)
112 break;
113 return;
114 case NL80211_IFTYPE_MONITOR:
115 if (mvmvif->monitor_active)
116 break;
117 return;
118 case NL80211_IFTYPE_P2P_DEVICE:
119 return;
120 default:
121 WARN_ON_ONCE(1);
122 return;
123 }
124
125 if (data->colors[id] < 0)
126 data->colors[id] = mvmvif->phy_ctxt->color;
127 else
128 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
129
130 data->n_interfaces[id]++;
131
132 #ifdef CONFIG_IWLWIFI_DEBUGFS
133 if (mvmvif->dbgfs_quota_min)
134 data->dbgfs_min[id] = max(data->dbgfs_min[id],
135 mvmvif->dbgfs_quota_min);
136 #endif
137
138 if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
139 data->n_low_latency_bindings++;
140 data->low_latency[id] = true;
141 }
142 }
143
144 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
145 struct iwl_time_quota_cmd *cmd)
146 {
147 #ifdef CONFIG_NL80211_TESTMODE
148 struct iwl_mvm_vif *mvmvif;
149 int i, phy_id = -1, beacon_int = 0;
150
151 if (!mvm->noa_duration || !mvm->noa_vif)
152 return;
153
154 mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
155 if (!mvmvif->ap_ibss_active)
156 return;
157
158 phy_id = mvmvif->phy_ctxt->id;
159 beacon_int = mvm->noa_vif->bss_conf.beacon_int;
160
161 for (i = 0; i < MAX_BINDINGS; i++) {
162 struct iwl_time_quota_data *data =
163 iwl_mvm_quota_cmd_get_quota(mvm, cmd,
164 i);
165 u32 id_n_c = le32_to_cpu(data->id_and_color);
166 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
167 u32 quota = le32_to_cpu(data->quota);
168
169 if (id != phy_id)
170 continue;
171
172 quota *= (beacon_int - mvm->noa_duration);
173 quota /= beacon_int;
174
175 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
176 le32_to_cpu(data->quota), quota);
177
178 data->quota = cpu_to_le32(quota);
179 }
180 #endif
181 }
182
183 int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
184 bool force_update,
185 struct ieee80211_vif *disabled_vif)
186 {
187 struct iwl_time_quota_cmd cmd = {};
188 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
189 struct iwl_mvm_quota_iterator_data data = {
190 .n_interfaces = {},
191 .colors = { -1, -1, -1, -1 },
192 .disabled_vif = disabled_vif,
193 };
194 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
195 struct iwl_time_quota_data *qdata, *last_data;
196 bool send = false;
197
198 lockdep_assert_held(&mvm->mutex);
199
200 if (fw_has_capa(&mvm->fw->ucode_capa,
201 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
202 return 0;
203
204 /* update all upon completion */
205 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
206 return 0;
207
208 /* iterator data above must match */
209 BUILD_BUG_ON(MAX_BINDINGS != 4);
210
211 ieee80211_iterate_active_interfaces_atomic(
212 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
213 iwl_mvm_quota_iterator, &data);
214
215 /*
216 * The FW's scheduling session consists of
217 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
218 * equally between all the bindings that require quota
219 */
220 num_active_macs = 0;
221 for (i = 0; i < MAX_BINDINGS; i++) {
222 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
223 qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
224 num_active_macs += data.n_interfaces[i];
225 }
226
227 n_non_lowlat = num_active_macs;
228
229 if (data.n_low_latency_bindings == 1) {
230 for (i = 0; i < MAX_BINDINGS; i++) {
231 if (data.low_latency[i]) {
232 n_non_lowlat -= data.n_interfaces[i];
233 break;
234 }
235 }
236 }
237
238 if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
239 /*
240 * Reserve quota for the low latency binding in case that
241 * there are several data bindings but only a single
242 * low latency one. Split the rest of the quota equally
243 * between the other data interfaces.
244 */
245 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
246 quota_rem = QUOTA_100 - n_non_lowlat * quota -
247 QUOTA_LOWLAT_MIN;
248 IWL_DEBUG_QUOTA(mvm,
249 "quota: low-latency binding active, remaining quota per other binding: %d\n",
250 quota);
251 } else if (num_active_macs) {
252 /*
253 * There are 0 or more than 1 low latency bindings, or all the
254 * data interfaces belong to the single low latency binding.
255 * Split the quota equally between the data interfaces.
256 */
257 quota = QUOTA_100 / num_active_macs;
258 quota_rem = QUOTA_100 % num_active_macs;
259 IWL_DEBUG_QUOTA(mvm,
260 "quota: splitting evenly per binding: %d\n",
261 quota);
262 } else {
263 /* values don't really matter - won't be used */
264 quota = 0;
265 quota_rem = 0;
266 }
267
268 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
269 if (data.colors[i] < 0)
270 continue;
271
272 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx);
273
274 qdata->id_and_color =
275 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
276
277 if (data.n_interfaces[i] <= 0)
278 qdata->quota = cpu_to_le32(0);
279 #ifdef CONFIG_IWLWIFI_DEBUGFS
280 else if (data.dbgfs_min[i])
281 qdata->quota =
282 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100);
283 #endif
284 else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
285 data.low_latency[i])
286 /*
287 * There is more than one binding, but only one of the
288 * bindings is in low latency. For this case, allocate
289 * the minimal required quota for the low latency
290 * binding.
291 */
292 qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
293 else
294 qdata->quota =
295 cpu_to_le32(quota * data.n_interfaces[i]);
296
297 WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100,
298 "Binding=%d, quota=%u > max=%u\n",
299 idx, le32_to_cpu(qdata->quota), QUOTA_100);
300
301 qdata->max_duration = cpu_to_le32(0);
302
303 idx++;
304 }
305
306 /* Give the remainder of the session to the first data binding */
307 for (i = 0; i < MAX_BINDINGS; i++) {
308 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
309 if (le32_to_cpu(qdata->quota) != 0) {
310 le32_add_cpu(&qdata->quota, quota_rem);
311 IWL_DEBUG_QUOTA(mvm,
312 "quota: giving remainder of %d to binding %d\n",
313 quota_rem, i);
314 break;
315 }
316 }
317
318 iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
319
320 /* check that we have non-zero quota for all valid bindings */
321 for (i = 0; i < MAX_BINDINGS; i++) {
322 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
323 last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i);
324 if (qdata->id_and_color != last_data->id_and_color)
325 send = true;
326 if (qdata->max_duration != last_data->max_duration)
327 send = true;
328 if (abs((int)le32_to_cpu(qdata->quota) -
329 (int)le32_to_cpu(last_data->quota))
330 > IWL_MVM_QUOTA_THRESHOLD)
331 send = true;
332 if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID))
333 continue;
334 WARN_ONCE(qdata->quota == 0,
335 "zero quota on binding %d\n", i);
336 }
337
338 if (!send && !force_update) {
339 /* don't send a practically unchanged command, the firmware has
340 * to re-initialize a lot of state and that can have an adverse
341 * impact on it
342 */
343 return 0;
344 }
345
346 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
347 iwl_mvm_quota_cmd_size(mvm), &cmd);
348
349 if (err)
350 IWL_ERR(mvm, "Failed to send quota: %d\n", err);
351 else
352 mvm->last_quota_cmd = cmd;
353 return err;
354 }