1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018, 2021 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->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->bss_conf.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 88 static 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 } 126 127 int 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 } 299