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 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 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 u32 id_n_c = le32_to_cpu(cmd->quotas[i].id_and_color); 168 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS; 169 u32 quota = le32_to_cpu(cmd->quotas[i].quota); 170 171 if (id != phy_id) 172 continue; 173 174 quota *= (beacon_int - mvm->noa_duration); 175 quota /= beacon_int; 176 177 IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n", 178 le32_to_cpu(cmd->quotas[i].quota), quota); 179 180 cmd->quotas[i].quota = cpu_to_le32(quota); 181 } 182 #endif 183 } 184 185 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, 186 bool force_update, 187 struct ieee80211_vif *disabled_vif) 188 { 189 struct iwl_time_quota_cmd cmd = {}; 190 int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat; 191 struct iwl_mvm_quota_iterator_data data = { 192 .n_interfaces = {}, 193 .colors = { -1, -1, -1, -1 }, 194 .disabled_vif = disabled_vif, 195 }; 196 struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd; 197 bool send = false; 198 199 lockdep_assert_held(&mvm->mutex); 200 201 /* update all upon completion */ 202 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 203 return 0; 204 205 /* iterator data above must match */ 206 BUILD_BUG_ON(MAX_BINDINGS != 4); 207 208 ieee80211_iterate_active_interfaces_atomic( 209 mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 210 iwl_mvm_quota_iterator, &data); 211 212 /* 213 * The FW's scheduling session consists of 214 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments 215 * equally between all the bindings that require quota 216 */ 217 num_active_macs = 0; 218 for (i = 0; i < MAX_BINDINGS; i++) { 219 cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID); 220 num_active_macs += data.n_interfaces[i]; 221 } 222 223 n_non_lowlat = num_active_macs; 224 225 if (data.n_low_latency_bindings == 1) { 226 for (i = 0; i < MAX_BINDINGS; i++) { 227 if (data.low_latency[i]) { 228 n_non_lowlat -= data.n_interfaces[i]; 229 break; 230 } 231 } 232 } 233 234 if (data.n_low_latency_bindings == 1 && n_non_lowlat) { 235 /* 236 * Reserve quota for the low latency binding in case that 237 * there are several data bindings but only a single 238 * low latency one. Split the rest of the quota equally 239 * between the other data interfaces. 240 */ 241 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat; 242 quota_rem = QUOTA_100 - n_non_lowlat * quota - 243 QUOTA_LOWLAT_MIN; 244 IWL_DEBUG_QUOTA(mvm, 245 "quota: low-latency binding active, remaining quota per other binding: %d\n", 246 quota); 247 } else if (num_active_macs) { 248 /* 249 * There are 0 or more than 1 low latency bindings, or all the 250 * data interfaces belong to the single low latency binding. 251 * Split the quota equally between the data interfaces. 252 */ 253 quota = QUOTA_100 / num_active_macs; 254 quota_rem = QUOTA_100 % num_active_macs; 255 IWL_DEBUG_QUOTA(mvm, 256 "quota: splitting evenly per binding: %d\n", 257 quota); 258 } else { 259 /* values don't really matter - won't be used */ 260 quota = 0; 261 quota_rem = 0; 262 } 263 264 for (idx = 0, i = 0; i < MAX_BINDINGS; i++) { 265 if (data.colors[i] < 0) 266 continue; 267 268 cmd.quotas[idx].id_and_color = 269 cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i])); 270 271 if (data.n_interfaces[i] <= 0) 272 cmd.quotas[idx].quota = cpu_to_le32(0); 273 #ifdef CONFIG_IWLWIFI_DEBUGFS 274 else if (data.dbgfs_min[i]) 275 cmd.quotas[idx].quota = 276 cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100); 277 #endif 278 else if (data.n_low_latency_bindings == 1 && n_non_lowlat && 279 data.low_latency[i]) 280 /* 281 * There is more than one binding, but only one of the 282 * bindings is in low latency. For this case, allocate 283 * the minimal required quota for the low latency 284 * binding. 285 */ 286 cmd.quotas[idx].quota = cpu_to_le32(QUOTA_LOWLAT_MIN); 287 else 288 cmd.quotas[idx].quota = 289 cpu_to_le32(quota * data.n_interfaces[i]); 290 291 WARN_ONCE(le32_to_cpu(cmd.quotas[idx].quota) > QUOTA_100, 292 "Binding=%d, quota=%u > max=%u\n", 293 idx, le32_to_cpu(cmd.quotas[idx].quota), QUOTA_100); 294 295 cmd.quotas[idx].max_duration = cpu_to_le32(0); 296 297 idx++; 298 } 299 300 /* Give the remainder of the session to the first data binding */ 301 for (i = 0; i < MAX_BINDINGS; i++) { 302 if (le32_to_cpu(cmd.quotas[i].quota) != 0) { 303 le32_add_cpu(&cmd.quotas[i].quota, quota_rem); 304 IWL_DEBUG_QUOTA(mvm, 305 "quota: giving remainder of %d to binding %d\n", 306 quota_rem, i); 307 break; 308 } 309 } 310 311 iwl_mvm_adjust_quota_for_noa(mvm, &cmd); 312 313 /* check that we have non-zero quota for all valid bindings */ 314 for (i = 0; i < MAX_BINDINGS; i++) { 315 if (cmd.quotas[i].id_and_color != last->quotas[i].id_and_color) 316 send = true; 317 if (cmd.quotas[i].max_duration != last->quotas[i].max_duration) 318 send = true; 319 if (abs((int)le32_to_cpu(cmd.quotas[i].quota) - 320 (int)le32_to_cpu(last->quotas[i].quota)) 321 > IWL_MVM_QUOTA_THRESHOLD) 322 send = true; 323 if (cmd.quotas[i].id_and_color == cpu_to_le32(FW_CTXT_INVALID)) 324 continue; 325 WARN_ONCE(cmd.quotas[i].quota == 0, 326 "zero quota on binding %d\n", i); 327 } 328 329 if (!send && !force_update) { 330 /* don't send a practically unchanged command, the firmware has 331 * to re-initialize a lot of state and that can have an adverse 332 * impact on it 333 */ 334 return 0; 335 } 336 337 err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, sizeof(cmd), &cmd); 338 339 if (err) 340 IWL_ERR(mvm, "Failed to send quota: %d\n", err); 341 else 342 mvm->last_quota_cmd = cmd; 343 return err; 344 } 345