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 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 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 } 127 128 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