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