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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) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 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 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
75struct 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
86static 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
149static 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 u32 id_n_c = le32_to_cpu(cmd->quotas[i].id_and_color);
168 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
169 u32 quota = le32_to_cpu(cmd->quotas[i].quota);
170
171 if (id != phy_id)
172 continue;
173
174 quota *= (beacon_int - mvm->noa_duration);
175 quota /= beacon_int;
176
177 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
178 le32_to_cpu(cmd->quotas[i].quota), quota);
179
180 cmd->quotas[i].quota = cpu_to_le32(quota);
181 }
182#endif
183}
184
185int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
186 bool force_update,
187 struct ieee80211_vif *disabled_vif)
188{
189 struct iwl_time_quota_cmd cmd = {};
190 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
191 struct iwl_mvm_quota_iterator_data data = {
192 .n_interfaces = {},
193 .colors = { -1, -1, -1, -1 },
194 .disabled_vif = disabled_vif,
195 };
196 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
197 bool send = false;
198
199 lockdep_assert_held(&mvm->mutex);
200
201 /* update all upon completion */
202 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
203 return 0;
204
205 /* iterator data above must match */
206 BUILD_BUG_ON(MAX_BINDINGS != 4);
207
208 ieee80211_iterate_active_interfaces_atomic(
209 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
210 iwl_mvm_quota_iterator, &data);
211
212 /*
213 * The FW's scheduling session consists of
214 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
215 * equally between all the bindings that require quota
216 */
217 num_active_macs = 0;
218 for (i = 0; i < MAX_BINDINGS; i++) {
219 cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
220 num_active_macs += data.n_interfaces[i];
221 }
222
223 n_non_lowlat = num_active_macs;
224
225 if (data.n_low_latency_bindings == 1) {
226 for (i = 0; i < MAX_BINDINGS; i++) {
227 if (data.low_latency[i]) {
228 n_non_lowlat -= data.n_interfaces[i];
229 break;
230 }
231 }
232 }
233
234 if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
235 /*
236 * Reserve quota for the low latency binding in case that
237 * there are several data bindings but only a single
238 * low latency one. Split the rest of the quota equally
239 * between the other data interfaces.
240 */
241 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
242 quota_rem = QUOTA_100 - n_non_lowlat * quota -
243 QUOTA_LOWLAT_MIN;
244 IWL_DEBUG_QUOTA(mvm,
245 "quota: low-latency binding active, remaining quota per other binding: %d\n",
246 quota);
247 } else if (num_active_macs) {
248 /*
249 * There are 0 or more than 1 low latency bindings, or all the
250 * data interfaces belong to the single low latency binding.
251 * Split the quota equally between the data interfaces.
252 */
253 quota = QUOTA_100 / num_active_macs;
254 quota_rem = QUOTA_100 % num_active_macs;
255 IWL_DEBUG_QUOTA(mvm,
256 "quota: splitting evenly per binding: %d\n",
257 quota);
258 } else {
259 /* values don't really matter - won't be used */
260 quota = 0;
261 quota_rem = 0;
262 }
263
264 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
265 if (data.colors[i] < 0)
266 continue;
267
268 cmd.quotas[idx].id_and_color =
269 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
270
271 if (data.n_interfaces[i] <= 0)
272 cmd.quotas[idx].quota = cpu_to_le32(0);
273#ifdef CONFIG_IWLWIFI_DEBUGFS
274 else if (data.dbgfs_min[i])
275 cmd.quotas[idx].quota =
276 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100);
277#endif
278 else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
279 data.low_latency[i])
280 /*
281 * There is more than one binding, but only one of the
282 * bindings is in low latency. For this case, allocate
283 * the minimal required quota for the low latency
284 * binding.
285 */
286 cmd.quotas[idx].quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
287 else
288 cmd.quotas[idx].quota =
289 cpu_to_le32(quota * data.n_interfaces[i]);
290
291 WARN_ONCE(le32_to_cpu(cmd.quotas[idx].quota) > QUOTA_100,
292 "Binding=%d, quota=%u > max=%u\n",
293 idx, le32_to_cpu(cmd.quotas[idx].quota), QUOTA_100);
294
295 cmd.quotas[idx].max_duration = cpu_to_le32(0);
296
297 idx++;
298 }
299
300 /* Give the remainder of the session to the first data binding */
301 for (i = 0; i < MAX_BINDINGS; i++) {
302 if (le32_to_cpu(cmd.quotas[i].quota) != 0) {
303 le32_add_cpu(&cmd.quotas[i].quota, quota_rem);
304 IWL_DEBUG_QUOTA(mvm,
305 "quota: giving remainder of %d to binding %d\n",
306 quota_rem, i);
307 break;
308 }
309 }
310
311 iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
312
313 /* check that we have non-zero quota for all valid bindings */
314 for (i = 0; i < MAX_BINDINGS; i++) {
315 if (cmd.quotas[i].id_and_color != last->quotas[i].id_and_color)
316 send = true;
317 if (cmd.quotas[i].max_duration != last->quotas[i].max_duration)
318 send = true;
319 if (abs((int)le32_to_cpu(cmd.quotas[i].quota) -
320 (int)le32_to_cpu(last->quotas[i].quota))
321 > IWL_MVM_QUOTA_THRESHOLD)
322 send = true;
323 if (cmd.quotas[i].id_and_color == cpu_to_le32(FW_CTXT_INVALID))
324 continue;
325 WARN_ONCE(cmd.quotas[i].quota == 0,
326 "zero quota on binding %d\n", i);
327 }
328
329 if (!send && !force_update) {
330 /* don't send a practically unchanged command, the firmware has
331 * to re-initialize a lot of state and that can have an adverse
332 * impact on it
333 */
334 return 0;
335 }
336
337 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, sizeof(cmd), &cmd);
338
339 if (err)
340 IWL_ERR(mvm, "Failed to send quota: %d\n", err);
341 else
342 mvm->last_quota_cmd = cmd;
343 return err;
344}