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) 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 33 * Copyright(c) 2018 Intel Corporation 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 40 * * Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * * Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in 44 * the documentation and/or other materials provided with the 45 * distribution. 46 * * Neither the name Intel Corporation nor the names of its 47 * contributors may be used to endorse or promote products derived 48 * from this software without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 61 * 62 *****************************************************************************/ 63 64 #include <net/mac80211.h> 65 #include "fw-api.h" 66 #include "mvm.h" 67 68 /* Maps the driver specific channel width definition to the fw values */ 69 u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef) 70 { 71 switch (chandef->width) { 72 case NL80211_CHAN_WIDTH_20_NOHT: 73 case NL80211_CHAN_WIDTH_20: 74 return PHY_VHT_CHANNEL_MODE20; 75 case NL80211_CHAN_WIDTH_40: 76 return PHY_VHT_CHANNEL_MODE40; 77 case NL80211_CHAN_WIDTH_80: 78 return PHY_VHT_CHANNEL_MODE80; 79 case NL80211_CHAN_WIDTH_160: 80 return PHY_VHT_CHANNEL_MODE160; 81 default: 82 WARN(1, "Invalid channel width=%u", chandef->width); 83 return PHY_VHT_CHANNEL_MODE20; 84 } 85 } 86 87 /* 88 * Maps the driver specific control channel position (relative to the center 89 * freq) definitions to the the fw values 90 */ 91 u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef) 92 { 93 switch (chandef->chan->center_freq - chandef->center_freq1) { 94 case -70: 95 return PHY_VHT_CTRL_POS_4_BELOW; 96 case -50: 97 return PHY_VHT_CTRL_POS_3_BELOW; 98 case -30: 99 return PHY_VHT_CTRL_POS_2_BELOW; 100 case -10: 101 return PHY_VHT_CTRL_POS_1_BELOW; 102 case 10: 103 return PHY_VHT_CTRL_POS_1_ABOVE; 104 case 30: 105 return PHY_VHT_CTRL_POS_2_ABOVE; 106 case 50: 107 return PHY_VHT_CTRL_POS_3_ABOVE; 108 case 70: 109 return PHY_VHT_CTRL_POS_4_ABOVE; 110 default: 111 WARN(1, "Invalid channel definition"); 112 case 0: 113 /* 114 * The FW is expected to check the control channel position only 115 * when in HT/VHT and the channel width is not 20MHz. Return 116 * this value as the default one. 117 */ 118 return PHY_VHT_CTRL_POS_1_BELOW; 119 } 120 } 121 122 /* 123 * Construct the generic fields of the PHY context command 124 */ 125 static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt, 126 struct iwl_phy_context_cmd *cmd, 127 u32 action, u32 apply_time) 128 { 129 memset(cmd, 0, sizeof(struct iwl_phy_context_cmd)); 130 131 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id, 132 ctxt->color)); 133 cmd->action = cpu_to_le32(action); 134 cmd->apply_time = cpu_to_le32(apply_time); 135 } 136 137 /* 138 * Add the phy configuration to the PHY context command 139 */ 140 static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm, 141 struct iwl_phy_context_cmd *cmd, 142 struct cfg80211_chan_def *chandef, 143 u8 chains_static, u8 chains_dynamic) 144 { 145 u8 active_cnt, idle_cnt; 146 147 /* Set the channel info data */ 148 cmd->ci.band = (chandef->chan->band == NL80211_BAND_2GHZ ? 149 PHY_BAND_24 : PHY_BAND_5); 150 151 cmd->ci.channel = chandef->chan->hw_value; 152 cmd->ci.width = iwl_mvm_get_channel_width(chandef); 153 cmd->ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef); 154 155 /* Set rx the chains */ 156 idle_cnt = chains_static; 157 active_cnt = chains_dynamic; 158 159 /* In scenarios where we only ever use a single-stream rates, 160 * i.e. legacy 11b/g/a associations, single-stream APs or even 161 * static SMPS, enable both chains to get diversity, improving 162 * the case where we're far enough from the AP that attenuation 163 * between the two antennas is sufficiently different to impact 164 * performance. 165 */ 166 if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) { 167 idle_cnt = 2; 168 active_cnt = 2; 169 } 170 171 cmd->rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) << 172 PHY_RX_CHAIN_VALID_POS); 173 cmd->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS); 174 cmd->rxchain_info |= cpu_to_le32(active_cnt << 175 PHY_RX_CHAIN_MIMO_CNT_POS); 176 #ifdef CONFIG_IWLWIFI_DEBUGFS 177 if (unlikely(mvm->dbgfs_rx_phyinfo)) 178 cmd->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo); 179 #endif 180 181 cmd->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 182 } 183 184 /* 185 * Send a command to apply the current phy configuration. The command is send 186 * only if something in the configuration changed: in case that this is the 187 * first time that the phy configuration is applied or in case that the phy 188 * configuration changed from the previous apply. 189 */ 190 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 191 struct iwl_mvm_phy_ctxt *ctxt, 192 struct cfg80211_chan_def *chandef, 193 u8 chains_static, u8 chains_dynamic, 194 u32 action, u32 apply_time) 195 { 196 struct iwl_phy_context_cmd cmd; 197 int ret; 198 199 /* Set the command header fields */ 200 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time); 201 202 /* Set the command data */ 203 iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef, 204 chains_static, chains_dynamic); 205 206 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 0, 207 sizeof(struct iwl_phy_context_cmd), 208 &cmd); 209 if (ret) 210 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 211 return ret; 212 } 213 214 /* 215 * Send a command to add a PHY context based on the current HW configuration. 216 */ 217 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 218 struct cfg80211_chan_def *chandef, 219 u8 chains_static, u8 chains_dynamic) 220 { 221 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 222 ctxt->ref); 223 lockdep_assert_held(&mvm->mutex); 224 225 ctxt->channel = chandef->chan; 226 227 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 228 chains_static, chains_dynamic, 229 FW_CTXT_ACTION_ADD, 0); 230 } 231 232 /* 233 * Update the number of references to the given PHY context. This is valid only 234 * in case the PHY context was already created, i.e., its reference count > 0. 235 */ 236 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 237 { 238 lockdep_assert_held(&mvm->mutex); 239 ctxt->ref++; 240 } 241 242 /* 243 * Send a command to modify the PHY context based on the current HW 244 * configuration. Note that the function does not check that the configuration 245 * changed. 246 */ 247 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 248 struct cfg80211_chan_def *chandef, 249 u8 chains_static, u8 chains_dynamic) 250 { 251 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 252 253 lockdep_assert_held(&mvm->mutex); 254 255 if (fw_has_capa(&mvm->fw->ucode_capa, 256 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 257 ctxt->channel->band != chandef->chan->band) { 258 int ret; 259 260 /* ... remove it here ...*/ 261 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 262 chains_static, chains_dynamic, 263 FW_CTXT_ACTION_REMOVE, 0); 264 if (ret) 265 return ret; 266 267 /* ... and proceed to add it again */ 268 action = FW_CTXT_ACTION_ADD; 269 } 270 271 ctxt->channel = chandef->chan; 272 ctxt->width = chandef->width; 273 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 274 chains_static, chains_dynamic, 275 action, 0); 276 } 277 278 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 279 { 280 lockdep_assert_held(&mvm->mutex); 281 282 if (WARN_ON_ONCE(!ctxt)) 283 return; 284 285 ctxt->ref--; 286 287 /* 288 * Move unused phy's to a default channel. When the phy is moved the, 289 * fw will cleanup immediate quiet bit if it was previously set, 290 * otherwise we might not be able to reuse this phy. 291 */ 292 if (ctxt->ref == 0) { 293 struct ieee80211_channel *chan; 294 struct cfg80211_chan_def chandef; 295 296 chan = &mvm->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[0]; 297 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); 298 iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); 299 } 300 } 301 302 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 303 struct ieee80211_vif *vif) 304 { 305 unsigned long *data = _data; 306 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 307 308 if (!mvmvif->phy_ctxt) 309 return; 310 311 if (vif->type == NL80211_IFTYPE_STATION || 312 vif->type == NL80211_IFTYPE_AP) 313 __set_bit(mvmvif->phy_ctxt->id, data); 314 } 315 316 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 317 { 318 unsigned long phy_ctxt_counter = 0; 319 320 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 321 IEEE80211_IFACE_ITER_NORMAL, 322 iwl_mvm_binding_iterator, 323 &phy_ctxt_counter); 324 325 return hweight8(phy_ctxt_counter); 326 } 327