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 struct iwl_phy_context_cmd_tail *tail = 147 iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci); 148 149 /* Set the channel info data */ 150 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 151 152 /* Set rx the chains */ 153 idle_cnt = chains_static; 154 active_cnt = chains_dynamic; 155 156 /* In scenarios where we only ever use a single-stream rates, 157 * i.e. legacy 11b/g/a associations, single-stream APs or even 158 * static SMPS, enable both chains to get diversity, improving 159 * the case where we're far enough from the AP that attenuation 160 * between the two antennas is sufficiently different to impact 161 * performance. 162 */ 163 if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) { 164 idle_cnt = 2; 165 active_cnt = 2; 166 } 167 168 tail->rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) << 169 PHY_RX_CHAIN_VALID_POS); 170 tail->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS); 171 tail->rxchain_info |= cpu_to_le32(active_cnt << 172 PHY_RX_CHAIN_MIMO_CNT_POS); 173 #ifdef CONFIG_IWLWIFI_DEBUGFS 174 if (unlikely(mvm->dbgfs_rx_phyinfo)) 175 tail->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo); 176 #endif 177 178 tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 179 } 180 181 /* 182 * Send a command to apply the current phy configuration. The command is send 183 * only if something in the configuration changed: in case that this is the 184 * first time that the phy configuration is applied or in case that the phy 185 * configuration changed from the previous apply. 186 */ 187 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 188 struct iwl_mvm_phy_ctxt *ctxt, 189 struct cfg80211_chan_def *chandef, 190 u8 chains_static, u8 chains_dynamic, 191 u32 action, u32 apply_time) 192 { 193 struct iwl_phy_context_cmd cmd; 194 int ret; 195 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); 196 197 /* Set the command header fields */ 198 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time); 199 200 /* Set the command data */ 201 iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef, 202 chains_static, chains_dynamic); 203 204 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 0, len, &cmd); 205 if (ret) 206 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 207 return ret; 208 } 209 210 /* 211 * Send a command to add a PHY context based on the current HW configuration. 212 */ 213 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 214 struct cfg80211_chan_def *chandef, 215 u8 chains_static, u8 chains_dynamic) 216 { 217 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 218 ctxt->ref); 219 lockdep_assert_held(&mvm->mutex); 220 221 ctxt->channel = chandef->chan; 222 223 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 224 chains_static, chains_dynamic, 225 FW_CTXT_ACTION_ADD, 0); 226 } 227 228 /* 229 * Update the number of references to the given PHY context. This is valid only 230 * in case the PHY context was already created, i.e., its reference count > 0. 231 */ 232 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 233 { 234 lockdep_assert_held(&mvm->mutex); 235 ctxt->ref++; 236 } 237 238 /* 239 * Send a command to modify the PHY context based on the current HW 240 * configuration. Note that the function does not check that the configuration 241 * changed. 242 */ 243 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 244 struct cfg80211_chan_def *chandef, 245 u8 chains_static, u8 chains_dynamic) 246 { 247 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 248 249 lockdep_assert_held(&mvm->mutex); 250 251 if (fw_has_capa(&mvm->fw->ucode_capa, 252 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 253 ctxt->channel->band != chandef->chan->band) { 254 int ret; 255 256 /* ... remove it here ...*/ 257 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 258 chains_static, chains_dynamic, 259 FW_CTXT_ACTION_REMOVE, 0); 260 if (ret) 261 return ret; 262 263 /* ... and proceed to add it again */ 264 action = FW_CTXT_ACTION_ADD; 265 } 266 267 ctxt->channel = chandef->chan; 268 ctxt->width = chandef->width; 269 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 270 chains_static, chains_dynamic, 271 action, 0); 272 } 273 274 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 275 { 276 lockdep_assert_held(&mvm->mutex); 277 278 if (WARN_ON_ONCE(!ctxt)) 279 return; 280 281 ctxt->ref--; 282 283 /* 284 * Move unused phy's to a default channel. When the phy is moved the, 285 * fw will cleanup immediate quiet bit if it was previously set, 286 * otherwise we might not be able to reuse this phy. 287 */ 288 if (ctxt->ref == 0) { 289 struct ieee80211_channel *chan; 290 struct cfg80211_chan_def chandef; 291 292 chan = &mvm->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[0]; 293 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); 294 iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); 295 } 296 } 297 298 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 299 struct ieee80211_vif *vif) 300 { 301 unsigned long *data = _data; 302 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 303 304 if (!mvmvif->phy_ctxt) 305 return; 306 307 if (vif->type == NL80211_IFTYPE_STATION || 308 vif->type == NL80211_IFTYPE_AP) 309 __set_bit(mvmvif->phy_ctxt->id, data); 310 } 311 312 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 313 { 314 unsigned long phy_ctxt_counter = 0; 315 316 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 317 IEEE80211_IFACE_ITER_NORMAL, 318 iwl_mvm_binding_iterator, 319 &phy_ctxt_counter); 320 321 return hweight8(phy_ctxt_counter); 322 } 323