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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/*
3 * Copyright (C) 2012-2014, 2018, 2021-2022 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
6 */
7#include <net/mac80211.h>
8#include "fw-api.h"
9#include "mvm.h"
10
11#define QUOTA_100 IWL_MVM_MAX_QUOTA
12#define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
13
14struct iwl_mvm_quota_iterator_data {
15 int n_interfaces[MAX_BINDINGS];
16 int colors[MAX_BINDINGS];
17 int low_latency[MAX_BINDINGS];
18#ifdef CONFIG_IWLWIFI_DEBUGFS
19 int dbgfs_min[MAX_BINDINGS];
20#endif
21 int n_low_latency_bindings;
22 struct ieee80211_vif *disabled_vif;
23};
24
25static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
26 struct ieee80211_vif *vif)
27{
28 struct iwl_mvm_quota_iterator_data *data = _data;
29 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
30 u16 id;
31
32 /* skip disabled interfaces here immediately */
33 if (vif == data->disabled_vif)
34 return;
35
36 if (!mvmvif->phy_ctxt)
37 return;
38
39 /* currently, PHY ID == binding ID */
40 id = mvmvif->phy_ctxt->id;
41
42 /* need at least one binding per PHY */
43 BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
44
45 if (WARN_ON_ONCE(id >= MAX_BINDINGS))
46 return;
47
48 switch (vif->type) {
49 case NL80211_IFTYPE_STATION:
50 if (vif->cfg.assoc)
51 break;
52 return;
53 case NL80211_IFTYPE_AP:
54 case NL80211_IFTYPE_ADHOC:
55 if (mvmvif->ap_ibss_active)
56 break;
57 return;
58 case NL80211_IFTYPE_MONITOR:
59 if (mvmvif->monitor_active)
60 break;
61 return;
62 case NL80211_IFTYPE_P2P_DEVICE:
63 return;
64 default:
65 WARN_ON_ONCE(1);
66 return;
67 }
68
69 if (data->colors[id] < 0)
70 data->colors[id] = mvmvif->phy_ctxt->color;
71 else
72 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
73
74 data->n_interfaces[id]++;
75
76#ifdef CONFIG_IWLWIFI_DEBUGFS
77 if (mvmvif->dbgfs_quota_min)
78 data->dbgfs_min[id] = max(data->dbgfs_min[id],
79 mvmvif->dbgfs_quota_min);
80#endif
81
82 if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
83 data->n_low_latency_bindings++;
84 data->low_latency[id] = true;
85 }
86}
87
88static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
89 struct iwl_time_quota_cmd *cmd)
90{
91#ifdef CONFIG_NL80211_TESTMODE
92 struct iwl_mvm_vif *mvmvif;
93 int i, phy_id = -1, beacon_int = 0;
94
95 if (!mvm->noa_duration || !mvm->noa_vif)
96 return;
97
98 mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
99 if (!mvmvif->ap_ibss_active)
100 return;
101
102 phy_id = mvmvif->phy_ctxt->id;
103 beacon_int = mvm->noa_vif->bss_conf.beacon_int;
104
105 for (i = 0; i < MAX_BINDINGS; i++) {
106 struct iwl_time_quota_data *data =
107 iwl_mvm_quota_cmd_get_quota(mvm, cmd,
108 i);
109 u32 id_n_c = le32_to_cpu(data->id_and_color);
110 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
111 u32 quota = le32_to_cpu(data->quota);
112
113 if (id != phy_id)
114 continue;
115
116 quota *= (beacon_int - mvm->noa_duration);
117 quota /= beacon_int;
118
119 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
120 le32_to_cpu(data->quota), quota);
121
122 data->quota = cpu_to_le32(quota);
123 }
124#endif
125}
126
127int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
128 bool force_update,
129 struct ieee80211_vif *disabled_vif)
130{
131 struct iwl_time_quota_cmd cmd = {};
132 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
133 struct iwl_mvm_quota_iterator_data data = {
134 .n_interfaces = {},
135 .colors = { -1, -1, -1, -1 },
136 .disabled_vif = disabled_vif,
137 };
138 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
139 struct iwl_time_quota_data *qdata, *last_data;
140 bool send = false;
141
142 lockdep_assert_held(&mvm->mutex);
143
144 if (fw_has_capa(&mvm->fw->ucode_capa,
145 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
146 return 0;
147
148 /* update all upon completion */
149 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
150 return 0;
151
152 /* iterator data above must match */
153 BUILD_BUG_ON(MAX_BINDINGS != 4);
154
155 ieee80211_iterate_active_interfaces_atomic(
156 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
157 iwl_mvm_quota_iterator, &data);
158
159 /*
160 * The FW's scheduling session consists of
161 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
162 * equally between all the bindings that require quota
163 */
164 num_active_macs = 0;
165 for (i = 0; i < MAX_BINDINGS; i++) {
166 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
167 qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
168 num_active_macs += data.n_interfaces[i];
169 }
170
171 n_non_lowlat = num_active_macs;
172
173 if (data.n_low_latency_bindings == 1) {
174 for (i = 0; i < MAX_BINDINGS; i++) {
175 if (data.low_latency[i]) {
176 n_non_lowlat -= data.n_interfaces[i];
177 break;
178 }
179 }
180 }
181
182 if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
183 /*
184 * Reserve quota for the low latency binding in case that
185 * there are several data bindings but only a single
186 * low latency one. Split the rest of the quota equally
187 * between the other data interfaces.
188 */
189 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
190 quota_rem = QUOTA_100 - n_non_lowlat * quota -
191 QUOTA_LOWLAT_MIN;
192 IWL_DEBUG_QUOTA(mvm,
193 "quota: low-latency binding active, remaining quota per other binding: %d\n",
194 quota);
195 } else if (num_active_macs) {
196 /*
197 * There are 0 or more than 1 low latency bindings, or all the
198 * data interfaces belong to the single low latency binding.
199 * Split the quota equally between the data interfaces.
200 */
201 quota = QUOTA_100 / num_active_macs;
202 quota_rem = QUOTA_100 % num_active_macs;
203 IWL_DEBUG_QUOTA(mvm,
204 "quota: splitting evenly per binding: %d\n",
205 quota);
206 } else {
207 /* values don't really matter - won't be used */
208 quota = 0;
209 quota_rem = 0;
210 }
211
212 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
213 if (data.colors[i] < 0)
214 continue;
215
216 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx);
217
218 qdata->id_and_color =
219 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
220
221 if (data.n_interfaces[i] <= 0)
222 qdata->quota = cpu_to_le32(0);
223#ifdef CONFIG_IWLWIFI_DEBUGFS
224 else if (data.dbgfs_min[i])
225 qdata->quota =
226 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100);
227#endif
228 else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
229 data.low_latency[i])
230 /*
231 * There is more than one binding, but only one of the
232 * bindings is in low latency. For this case, allocate
233 * the minimal required quota for the low latency
234 * binding.
235 */
236 qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
237 else
238 qdata->quota =
239 cpu_to_le32(quota * data.n_interfaces[i]);
240
241 WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100,
242 "Binding=%d, quota=%u > max=%u\n",
243 idx, le32_to_cpu(qdata->quota), QUOTA_100);
244
245 qdata->max_duration = cpu_to_le32(0);
246
247 idx++;
248 }
249
250 /* Give the remainder of the session to the first data binding */
251 for (i = 0; i < MAX_BINDINGS; i++) {
252 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
253 if (le32_to_cpu(qdata->quota) != 0) {
254 le32_add_cpu(&qdata->quota, quota_rem);
255 IWL_DEBUG_QUOTA(mvm,
256 "quota: giving remainder of %d to binding %d\n",
257 quota_rem, i);
258 break;
259 }
260 }
261
262 iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
263
264 /* check that we have non-zero quota for all valid bindings */
265 for (i = 0; i < MAX_BINDINGS; i++) {
266 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
267 last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i);
268 if (qdata->id_and_color != last_data->id_and_color)
269 send = true;
270 if (qdata->max_duration != last_data->max_duration)
271 send = true;
272 if (abs((int)le32_to_cpu(qdata->quota) -
273 (int)le32_to_cpu(last_data->quota))
274 > IWL_MVM_QUOTA_THRESHOLD)
275 send = true;
276 if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID))
277 continue;
278 WARN_ONCE(qdata->quota == 0,
279 "zero quota on binding %d\n", i);
280 }
281
282 if (!send && !force_update) {
283 /* don't send a practically unchanged command, the firmware has
284 * to re-initialize a lot of state and that can have an adverse
285 * impact on it
286 */
287 return 0;
288 }
289
290 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
291 iwl_mvm_quota_cmd_size(mvm), &cmd);
292
293 if (err)
294 IWL_ERR(mvm, "Failed to send quota: %d\n", err);
295 else
296 mvm->last_quota_cmd = cmd;
297 return err;
298}