1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 68 #include <net/mac80211.h> 69 #include "fw-api.h" 70 #include "mvm.h" 71 72 #define QUOTA_100 IWL_MVM_MAX_QUOTA 73 #define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100) 74 75 struct iwl_mvm_quota_iterator_data { 76 int n_interfaces[MAX_BINDINGS]; 77 int colors[MAX_BINDINGS]; 78 int low_latency[MAX_BINDINGS]; 79 #ifdef CONFIG_IWLWIFI_DEBUGFS 80 int dbgfs_min[MAX_BINDINGS]; 81 #endif 82 int n_low_latency_bindings; 83 struct ieee80211_vif *disabled_vif; 84 }; 85 86 static void iwl_mvm_quota_iterator(void *_data, u8 *mac, 87 struct ieee80211_vif *vif) 88 { 89 struct iwl_mvm_quota_iterator_data *data = _data; 90 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 91 u16 id; 92 93 /* skip disabled interfaces here immediately */ 94 if (vif == data->disabled_vif) 95 return; 96 97 if (!mvmvif->phy_ctxt) 98 return; 99 100 /* currently, PHY ID == binding ID */ 101 id = mvmvif->phy_ctxt->id; 102 103 /* need at least one binding per PHY */ 104 BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS); 105 106 if (WARN_ON_ONCE(id >= MAX_BINDINGS)) 107 return; 108 109 switch (vif->type) { 110 case NL80211_IFTYPE_STATION: 111 if (vif->bss_conf.assoc) 112 break; 113 return; 114 case NL80211_IFTYPE_AP: 115 case NL80211_IFTYPE_ADHOC: 116 if (mvmvif->ap_ibss_active) 117 break; 118 return; 119 case NL80211_IFTYPE_MONITOR: 120 if (mvmvif->monitor_active) 121 break; 122 return; 123 case NL80211_IFTYPE_P2P_DEVICE: 124 return; 125 default: 126 WARN_ON_ONCE(1); 127 return; 128 } 129 130 if (data->colors[id] < 0) 131 data->colors[id] = mvmvif->phy_ctxt->color; 132 else 133 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color); 134 135 data->n_interfaces[id]++; 136 137 #ifdef CONFIG_IWLWIFI_DEBUGFS 138 if (mvmvif->dbgfs_quota_min) 139 data->dbgfs_min[id] = max(data->dbgfs_min[id], 140 mvmvif->dbgfs_quota_min); 141 #endif 142 143 if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) { 144 data->n_low_latency_bindings++; 145 data->low_latency[id] = true; 146 } 147 } 148 149 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm, 150 struct iwl_time_quota_cmd *cmd) 151 { 152 #ifdef CONFIG_NL80211_TESTMODE 153 struct iwl_mvm_vif *mvmvif; 154 int i, phy_id = -1, beacon_int = 0; 155 156 if (!mvm->noa_duration || !mvm->noa_vif) 157 return; 158 159 mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif); 160 if (!mvmvif->ap_ibss_active) 161 return; 162 163 phy_id = mvmvif->phy_ctxt->id; 164 beacon_int = mvm->noa_vif->bss_conf.beacon_int; 165 166 for (i = 0; i < MAX_BINDINGS; i++) { 167 struct iwl_time_quota_data *data = 168 iwl_mvm_quota_cmd_get_quota(mvm, cmd, 169 i); 170 u32 id_n_c = le32_to_cpu(data->id_and_color); 171 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS; 172 u32 quota = le32_to_cpu(data->quota); 173 174 if (id != phy_id) 175 continue; 176 177 quota *= (beacon_int - mvm->noa_duration); 178 quota /= beacon_int; 179 180 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n", 181 le32_to_cpu(data->quota), quota); 182 183 data->quota = cpu_to_le32(quota); 184 } 185 #endif 186 } 187 188 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, 189 bool force_update, 190 struct ieee80211_vif *disabled_vif) 191 { 192 struct iwl_time_quota_cmd cmd = {}; 193 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat; 194 struct iwl_mvm_quota_iterator_data data = { 195 .n_interfaces = {}, 196 .colors = { -1, -1, -1, -1 }, 197 .disabled_vif = disabled_vif, 198 }; 199 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd; 200 struct iwl_time_quota_data *qdata, *last_data; 201 bool send = false; 202 203 lockdep_assert_held(&mvm->mutex); 204 205 if (fw_has_capa(&mvm->fw->ucode_capa, 206 IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA)) 207 return 0; 208 209 /* update all upon completion */ 210 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 211 return 0; 212 213 /* iterator data above must match */ 214 BUILD_BUG_ON(MAX_BINDINGS != 4); 215 216 ieee80211_iterate_active_interfaces_atomic( 217 mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 218 iwl_mvm_quota_iterator, &data); 219 220 /* 221 * The FW's scheduling session consists of 222 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments 223 * equally between all the bindings that require quota 224 */ 225 num_active_macs = 0; 226 for (i = 0; i < MAX_BINDINGS; i++) { 227 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); 228 qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID); 229 num_active_macs += data.n_interfaces[i]; 230 } 231 232 n_non_lowlat = num_active_macs; 233 234 if (data.n_low_latency_bindings == 1) { 235 for (i = 0; i < MAX_BINDINGS; i++) { 236 if (data.low_latency[i]) { 237 n_non_lowlat -= data.n_interfaces[i]; 238 break; 239 } 240 } 241 } 242 243 if (data.n_low_latency_bindings == 1 && n_non_lowlat) { 244 /* 245 * Reserve quota for the low latency binding in case that 246 * there are several data bindings but only a single 247 * low latency one. Split the rest of the quota equally 248 * between the other data interfaces. 249 */ 250 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat; 251 quota_rem = QUOTA_100 - n_non_lowlat * quota - 252 QUOTA_LOWLAT_MIN; 253 IWL_DEBUG_QUOTA(mvm, 254 "quota: low-latency binding active, remaining quota per other binding: %d\n", 255 quota); 256 } else if (num_active_macs) { 257 /* 258 * There are 0 or more than 1 low latency bindings, or all the 259 * data interfaces belong to the single low latency binding. 260 * Split the quota equally between the data interfaces. 261 */ 262 quota = QUOTA_100 / num_active_macs; 263 quota_rem = QUOTA_100 % num_active_macs; 264 IWL_DEBUG_QUOTA(mvm, 265 "quota: splitting evenly per binding: %d\n", 266 quota); 267 } else { 268 /* values don't really matter - won't be used */ 269 quota = 0; 270 quota_rem = 0; 271 } 272 273 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) { 274 if (data.colors[i] < 0) 275 continue; 276 277 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx); 278 279 qdata->id_and_color = 280 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i])); 281 282 if (data.n_interfaces[i] <= 0) 283 qdata->quota = cpu_to_le32(0); 284 #ifdef CONFIG_IWLWIFI_DEBUGFS 285 else if (data.dbgfs_min[i]) 286 qdata->quota = 287 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100); 288 #endif 289 else if (data.n_low_latency_bindings == 1 && n_non_lowlat && 290 data.low_latency[i]) 291 /* 292 * There is more than one binding, but only one of the 293 * bindings is in low latency. For this case, allocate 294 * the minimal required quota for the low latency 295 * binding. 296 */ 297 qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN); 298 else 299 qdata->quota = 300 cpu_to_le32(quota * data.n_interfaces[i]); 301 302 WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100, 303 "Binding=%d, quota=%u > max=%u\n", 304 idx, le32_to_cpu(qdata->quota), QUOTA_100); 305 306 qdata->max_duration = cpu_to_le32(0); 307 308 idx++; 309 } 310 311 /* Give the remainder of the session to the first data binding */ 312 for (i = 0; i < MAX_BINDINGS; i++) { 313 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); 314 if (le32_to_cpu(qdata->quota) != 0) { 315 le32_add_cpu(&qdata->quota, quota_rem); 316 IWL_DEBUG_QUOTA(mvm, 317 "quota: giving remainder of %d to binding %d\n", 318 quota_rem, i); 319 break; 320 } 321 } 322 323 iwl_mvm_adjust_quota_for_noa(mvm, &cmd); 324 325 /* check that we have non-zero quota for all valid bindings */ 326 for (i = 0; i < MAX_BINDINGS; i++) { 327 qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); 328 last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i); 329 if (qdata->id_and_color != last_data->id_and_color) 330 send = true; 331 if (qdata->max_duration != last_data->max_duration) 332 send = true; 333 if (abs((int)le32_to_cpu(qdata->quota) - 334 (int)le32_to_cpu(last_data->quota)) 335 > IWL_MVM_QUOTA_THRESHOLD) 336 send = true; 337 if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID)) 338 continue; 339 WARN_ONCE(qdata->quota == 0, 340 "zero quota on binding %d\n", i); 341 } 342 343 if (!send && !force_update) { 344 /* don't send a practically unchanged command, the firmware has 345 * to re-initialize a lot of state and that can have an adverse 346 * impact on it 347 */ 348 return 0; 349 } 350 351 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, 352 iwl_mvm_quota_cmd_size(mvm), &cmd); 353 354 if (err) 355 IWL_ERR(mvm, "Failed to send quota: %d\n", err); 356 else 357 mvm->last_quota_cmd = cmd; 358 return err; 359 } 360