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
14 struct 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
iwl_mvm_quota_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)25 static 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->deflink.phy_ctxt)
37 return;
38
39 /* currently, PHY ID == binding ID */
40 id = mvmvif->deflink.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->deflink.phy_ctxt->color;
71 else
72 WARN_ON_ONCE(data->colors[id] !=
73 mvmvif->deflink.phy_ctxt->color);
74
75 data->n_interfaces[id]++;
76
77 #ifdef CONFIG_IWLWIFI_DEBUGFS
78 if (mvmvif->dbgfs_quota_min)
79 data->dbgfs_min[id] = max(data->dbgfs_min[id],
80 mvmvif->dbgfs_quota_min);
81 #endif
82
83 if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
84 data->n_low_latency_bindings++;
85 data->low_latency[id] = true;
86 }
87 }
88
iwl_mvm_adjust_quota_for_noa(struct iwl_mvm * mvm,struct iwl_time_quota_cmd * cmd)89 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
90 struct iwl_time_quota_cmd *cmd)
91 {
92 #ifdef CONFIG_NL80211_TESTMODE
93 struct iwl_mvm_vif *mvmvif;
94 int i, phy_id = -1, beacon_int = 0;
95
96 if (!mvm->noa_duration || !mvm->noa_vif)
97 return;
98
99 mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
100 if (!mvmvif->ap_ibss_active)
101 return;
102
103 phy_id = mvmvif->deflink.phy_ctxt->id;
104 beacon_int = mvm->noa_vif->bss_conf.beacon_int;
105
106 for (i = 0; i < MAX_BINDINGS; i++) {
107 struct iwl_time_quota_data *data =
108 iwl_mvm_quota_cmd_get_quota(mvm, cmd,
109 i);
110 u32 id_n_c = le32_to_cpu(data->id_and_color);
111 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
112 u32 quota = le32_to_cpu(data->quota);
113
114 if (id != phy_id)
115 continue;
116
117 quota *= (beacon_int - mvm->noa_duration);
118 quota /= beacon_int;
119
120 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
121 le32_to_cpu(data->quota), quota);
122
123 data->quota = cpu_to_le32(quota);
124 }
125 #endif
126 }
127
iwl_mvm_update_quotas(struct iwl_mvm * mvm,bool force_update,struct ieee80211_vif * disabled_vif)128 int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
129 bool force_update,
130 struct ieee80211_vif *disabled_vif)
131 {
132 struct iwl_time_quota_cmd cmd = {};
133 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
134 struct iwl_mvm_quota_iterator_data data = {
135 .n_interfaces = {},
136 .colors = { -1, -1, -1, -1 },
137 .disabled_vif = disabled_vif,
138 };
139 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
140 struct iwl_time_quota_data *qdata, *last_data;
141 bool send = false;
142
143 lockdep_assert_held(&mvm->mutex);
144
145 if (fw_has_capa(&mvm->fw->ucode_capa,
146 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
147 return 0;
148
149 /* update all upon completion */
150 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
151 return 0;
152
153 /* iterator data above must match */
154 BUILD_BUG_ON(MAX_BINDINGS != 4);
155
156 ieee80211_iterate_active_interfaces_atomic(
157 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
158 iwl_mvm_quota_iterator, &data);
159
160 /*
161 * The FW's scheduling session consists of
162 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
163 * equally between all the bindings that require quota
164 */
165 num_active_macs = 0;
166 for (i = 0; i < MAX_BINDINGS; i++) {
167 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
168 qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
169 num_active_macs += data.n_interfaces[i];
170 }
171
172 n_non_lowlat = num_active_macs;
173
174 if (data.n_low_latency_bindings == 1) {
175 for (i = 0; i < MAX_BINDINGS; i++) {
176 if (data.low_latency[i]) {
177 n_non_lowlat -= data.n_interfaces[i];
178 break;
179 }
180 }
181 }
182
183 if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
184 /*
185 * Reserve quota for the low latency binding in case that
186 * there are several data bindings but only a single
187 * low latency one. Split the rest of the quota equally
188 * between the other data interfaces.
189 */
190 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
191 quota_rem = QUOTA_100 - n_non_lowlat * quota -
192 QUOTA_LOWLAT_MIN;
193 IWL_DEBUG_QUOTA(mvm,
194 "quota: low-latency binding active, remaining quota per other binding: %d\n",
195 quota);
196 } else if (num_active_macs) {
197 /*
198 * There are 0 or more than 1 low latency bindings, or all the
199 * data interfaces belong to the single low latency binding.
200 * Split the quota equally between the data interfaces.
201 */
202 quota = QUOTA_100 / num_active_macs;
203 quota_rem = QUOTA_100 % num_active_macs;
204 IWL_DEBUG_QUOTA(mvm,
205 "quota: splitting evenly per binding: %d\n",
206 quota);
207 } else {
208 /* values don't really matter - won't be used */
209 quota = 0;
210 quota_rem = 0;
211 }
212
213 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
214 if (data.colors[i] < 0)
215 continue;
216
217 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx);
218
219 qdata->id_and_color =
220 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
221
222 if (data.n_interfaces[i] <= 0)
223 qdata->quota = cpu_to_le32(0);
224 #ifdef CONFIG_IWLWIFI_DEBUGFS
225 else if (data.dbgfs_min[i])
226 qdata->quota =
227 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100);
228 #endif
229 else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
230 data.low_latency[i])
231 /*
232 * There is more than one binding, but only one of the
233 * bindings is in low latency. For this case, allocate
234 * the minimal required quota for the low latency
235 * binding.
236 */
237 qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
238 else
239 qdata->quota =
240 cpu_to_le32(quota * data.n_interfaces[i]);
241
242 WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100,
243 "Binding=%d, quota=%u > max=%u\n",
244 idx, le32_to_cpu(qdata->quota), QUOTA_100);
245
246 qdata->max_duration = cpu_to_le32(0);
247
248 idx++;
249 }
250
251 /* Give the remainder of the session to the first data binding */
252 for (i = 0; i < MAX_BINDINGS; i++) {
253 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
254 if (le32_to_cpu(qdata->quota) != 0) {
255 le32_add_cpu(&qdata->quota, quota_rem);
256 IWL_DEBUG_QUOTA(mvm,
257 "quota: giving remainder of %d to binding %d\n",
258 quota_rem, i);
259 break;
260 }
261 }
262
263 iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
264
265 /* check that we have non-zero quota for all valid bindings */
266 for (i = 0; i < MAX_BINDINGS; i++) {
267 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
268 last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i);
269 if (qdata->id_and_color != last_data->id_and_color)
270 send = true;
271 if (qdata->max_duration != last_data->max_duration)
272 send = true;
273 if (abs((int)le32_to_cpu(qdata->quota) -
274 (int)le32_to_cpu(last_data->quota))
275 > IWL_MVM_QUOTA_THRESHOLD)
276 send = true;
277 if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID))
278 continue;
279 WARN_ONCE(qdata->quota == 0,
280 "zero quota on binding %d\n", i);
281 }
282
283 if (!send && !force_update) {
284 /* don't send a practically unchanged command, the firmware has
285 * to re-initialize a lot of state and that can have an adverse
286 * impact on it
287 */
288 return 0;
289 }
290
291 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
292 iwl_mvm_quota_cmd_size(mvm), &cmd);
293
294 if (err)
295 IWL_ERR(mvm, "Failed to send quota: %d\n", err);
296 else
297 mvm->last_quota_cmd = cmd;
298 return err;
299 }
300