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