1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018, 2021-2022, 2025 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 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, 90 bool force_update, 91 struct ieee80211_vif *disabled_vif) 92 { 93 struct iwl_time_quota_cmd cmd = {}; 94 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat; 95 struct iwl_mvm_quota_iterator_data data = { 96 .n_interfaces = {}, 97 .colors = { -1, -1, -1, -1 }, 98 .disabled_vif = disabled_vif, 99 }; 100 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd; 101 struct iwl_time_quota_data *qdata, *last_data; 102 bool send = false; 103 104 lockdep_assert_held(&mvm->mutex); 105 106 if (fw_has_capa(&mvm->fw->ucode_capa, 107 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA)) 108 return 0; 109 110 /* update all upon completion */ 111 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 112 return 0; 113 114 /* iterator data above must match */ 115 BUILD_BUG_ON(MAX_BINDINGS != 4); 116 117 ieee80211_iterate_active_interfaces_atomic( 118 mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 119 iwl_mvm_quota_iterator, &data); 120 121 /* 122 * The FW's scheduling session consists of 123 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments 124 * equally between all the bindings that require quota 125 */ 126 num_active_macs = 0; 127 for (i = 0; i < MAX_BINDINGS; i++) { 128 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); 129 qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID); 130 num_active_macs += data.n_interfaces[i]; 131 } 132 133 n_non_lowlat = num_active_macs; 134 135 if (data.n_low_latency_bindings == 1) { 136 for (i = 0; i < MAX_BINDINGS; i++) { 137 if (data.low_latency[i]) { 138 n_non_lowlat -= data.n_interfaces[i]; 139 break; 140 } 141 } 142 } 143 144 if (data.n_low_latency_bindings == 1 && n_non_lowlat) { 145 /* 146 * Reserve quota for the low latency binding in case that 147 * there are several data bindings but only a single 148 * low latency one. Split the rest of the quota equally 149 * between the other data interfaces. 150 */ 151 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat; 152 quota_rem = QUOTA_100 - n_non_lowlat * quota - 153 QUOTA_LOWLAT_MIN; 154 IWL_DEBUG_QUOTA(mvm, 155 "quota: low-latency binding active, remaining quota per other binding: %d\n", 156 quota); 157 } else if (num_active_macs) { 158 /* 159 * There are 0 or more than 1 low latency bindings, or all the 160 * data interfaces belong to the single low latency binding. 161 * Split the quota equally between the data interfaces. 162 */ 163 quota = QUOTA_100 / num_active_macs; 164 quota_rem = QUOTA_100 % num_active_macs; 165 IWL_DEBUG_QUOTA(mvm, 166 "quota: splitting evenly per binding: %d\n", 167 quota); 168 } else { 169 /* values don't really matter - won't be used */ 170 quota = 0; 171 quota_rem = 0; 172 } 173 174 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) { 175 if (data.colors[i] < 0) 176 continue; 177 178 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx); 179 180 qdata->id_and_color = 181 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i])); 182 183 if (data.n_interfaces[i] <= 0) 184 qdata->quota = cpu_to_le32(0); 185 #ifdef CONFIG_IWLWIFI_DEBUGFS 186 else if (data.dbgfs_min[i]) 187 qdata->quota = 188 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100); 189 #endif 190 else if (data.n_low_latency_bindings == 1 && n_non_lowlat && 191 data.low_latency[i]) 192 /* 193 * There is more than one binding, but only one of the 194 * bindings is in low latency. For this case, allocate 195 * the minimal required quota for the low latency 196 * binding. 197 */ 198 qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN); 199 else 200 qdata->quota = 201 cpu_to_le32(quota * data.n_interfaces[i]); 202 203 WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100, 204 "Binding=%d, quota=%u > max=%u\n", 205 idx, le32_to_cpu(qdata->quota), QUOTA_100); 206 207 qdata->max_duration = cpu_to_le32(0); 208 209 idx++; 210 } 211 212 /* Give the remainder of the session to the first data binding */ 213 for (i = 0; i < MAX_BINDINGS; i++) { 214 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); 215 if (le32_to_cpu(qdata->quota) != 0) { 216 le32_add_cpu(&qdata->quota, quota_rem); 217 IWL_DEBUG_QUOTA(mvm, 218 "quota: giving remainder of %d to binding %d\n", 219 quota_rem, i); 220 break; 221 } 222 } 223 224 /* check that we have non-zero quota for all valid bindings */ 225 for (i = 0; i < MAX_BINDINGS; i++) { 226 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); 227 last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i); 228 if (qdata->id_and_color != last_data->id_and_color) 229 send = true; 230 if (qdata->max_duration != last_data->max_duration) 231 send = true; 232 if (abs((int)le32_to_cpu(qdata->quota) - 233 (int)le32_to_cpu(last_data->quota)) 234 > IWL_MVM_QUOTA_THRESHOLD) 235 send = true; 236 if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID)) 237 continue; 238 WARN_ONCE(qdata->quota == 0, 239 "zero quota on binding %d\n", i); 240 } 241 242 if (!send && !force_update) { 243 /* don't send a practically unchanged command, the firmware has 244 * to re-initialize a lot of state and that can have an adverse 245 * impact on it 246 */ 247 return 0; 248 } 249 250 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, 251 iwl_mvm_quota_cmd_size(mvm), &cmd); 252 253 if (err) 254 IWL_ERR(mvm, "Failed to send quota: %d\n", err); 255 else 256 mvm->last_quota_cmd = cmd; 257 return err; 258 } 259