1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2021 Intel Corporation 4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH 5 * Copyright (C) 2017 Intel Deutschland GmbH 6 */ 7 #include <net/mac80211.h> 8 #include "fw-api.h" 9 #include "mvm.h" 10 11 /* Maps the driver specific channel width definition to the fw values */ 12 u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef) 13 { 14 switch (chandef->width) { 15 case NL80211_CHAN_WIDTH_20_NOHT: 16 case NL80211_CHAN_WIDTH_20: 17 return PHY_VHT_CHANNEL_MODE20; 18 case NL80211_CHAN_WIDTH_40: 19 return PHY_VHT_CHANNEL_MODE40; 20 case NL80211_CHAN_WIDTH_80: 21 return PHY_VHT_CHANNEL_MODE80; 22 case NL80211_CHAN_WIDTH_160: 23 return PHY_VHT_CHANNEL_MODE160; 24 default: 25 WARN(1, "Invalid channel width=%u", chandef->width); 26 return PHY_VHT_CHANNEL_MODE20; 27 } 28 } 29 30 /* 31 * Maps the driver specific control channel position (relative to the center 32 * freq) definitions to the the fw values 33 */ 34 u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef) 35 { 36 switch (chandef->chan->center_freq - chandef->center_freq1) { 37 case -70: 38 return PHY_VHT_CTRL_POS_4_BELOW; 39 case -50: 40 return PHY_VHT_CTRL_POS_3_BELOW; 41 case -30: 42 return PHY_VHT_CTRL_POS_2_BELOW; 43 case -10: 44 return PHY_VHT_CTRL_POS_1_BELOW; 45 case 10: 46 return PHY_VHT_CTRL_POS_1_ABOVE; 47 case 30: 48 return PHY_VHT_CTRL_POS_2_ABOVE; 49 case 50: 50 return PHY_VHT_CTRL_POS_3_ABOVE; 51 case 70: 52 return PHY_VHT_CTRL_POS_4_ABOVE; 53 default: 54 WARN(1, "Invalid channel definition"); 55 fallthrough; 56 case 0: 57 /* 58 * The FW is expected to check the control channel position only 59 * when in HT/VHT and the channel width is not 20MHz. Return 60 * this value as the default one. 61 */ 62 return PHY_VHT_CTRL_POS_1_BELOW; 63 } 64 } 65 66 /* 67 * Construct the generic fields of the PHY context command 68 */ 69 static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt, 70 struct iwl_phy_context_cmd *cmd, 71 u32 action) 72 { 73 cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id, 74 ctxt->color)); 75 cmd->action = cpu_to_le32(action); 76 } 77 78 static void iwl_mvm_phy_ctxt_set_rxchain(struct iwl_mvm *mvm, 79 struct iwl_mvm_phy_ctxt *ctxt, 80 __le32 *rxchain_info, 81 u8 chains_static, 82 u8 chains_dynamic) 83 { 84 u8 active_cnt, idle_cnt; 85 86 /* Set rx the chains */ 87 idle_cnt = chains_static; 88 active_cnt = chains_dynamic; 89 90 /* In scenarios where we only ever use a single-stream rates, 91 * i.e. legacy 11b/g/a associations, single-stream APs or even 92 * static SMPS, enable both chains to get diversity, improving 93 * the case where we're far enough from the AP that attenuation 94 * between the two antennas is sufficiently different to impact 95 * performance. 96 */ 97 if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm, ctxt)) { 98 idle_cnt = 2; 99 active_cnt = 2; 100 } 101 102 /* 103 * If the firmware requested it, then we know that it supports 104 * getting zero for the values to indicate "use one, but pick 105 * which one yourself", which means it can dynamically pick one 106 * that e.g. has better RSSI. 107 */ 108 if (mvm->fw_static_smps_request && active_cnt == 1 && idle_cnt == 1) { 109 idle_cnt = 0; 110 active_cnt = 0; 111 } 112 113 *rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) << 114 PHY_RX_CHAIN_VALID_POS); 115 *rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS); 116 *rxchain_info |= cpu_to_le32(active_cnt << 117 PHY_RX_CHAIN_MIMO_CNT_POS); 118 #ifdef CONFIG_IWLWIFI_DEBUGFS 119 if (unlikely(mvm->dbgfs_rx_phyinfo)) 120 *rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo); 121 #endif 122 } 123 124 /* 125 * Add the phy configuration to the PHY context command 126 */ 127 static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm, 128 struct iwl_mvm_phy_ctxt *ctxt, 129 struct iwl_phy_context_cmd_v1 *cmd, 130 struct cfg80211_chan_def *chandef, 131 u8 chains_static, u8 chains_dynamic) 132 { 133 struct iwl_phy_context_cmd_tail *tail = 134 iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci); 135 136 /* Set the channel info data */ 137 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 138 139 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &tail->rxchain_info, 140 chains_static, chains_dynamic); 141 142 tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 143 } 144 145 /* 146 * Add the phy configuration to the PHY context command 147 */ 148 static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm, 149 struct iwl_mvm_phy_ctxt *ctxt, 150 struct iwl_phy_context_cmd *cmd, 151 struct cfg80211_chan_def *chandef, 152 u8 chains_static, u8 chains_dynamic) 153 { 154 cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm->fw, 155 chandef->chan->band)); 156 157 /* Set the channel info data */ 158 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 159 160 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info, 161 chains_static, chains_dynamic); 162 } 163 164 /* 165 * Send a command to apply the current phy configuration. The command is send 166 * only if something in the configuration changed: in case that this is the 167 * first time that the phy configuration is applied or in case that the phy 168 * configuration changed from the previous apply. 169 */ 170 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 171 struct iwl_mvm_phy_ctxt *ctxt, 172 struct cfg80211_chan_def *chandef, 173 u8 chains_static, u8 chains_dynamic, 174 u32 action) 175 { 176 int ret; 177 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP, 178 PHY_CONTEXT_CMD, 1); 179 180 if (ver == 3) { 181 struct iwl_phy_context_cmd cmd = {}; 182 183 /* Set the command header fields */ 184 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action); 185 186 /* Set the command data */ 187 iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef, 188 chains_static, 189 chains_dynamic); 190 191 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 192 0, sizeof(cmd), &cmd); 193 } else if (ver < 3) { 194 struct iwl_phy_context_cmd_v1 cmd = {}; 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, 199 (struct iwl_phy_context_cmd *)&cmd, 200 action); 201 202 /* Set the command data */ 203 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef, 204 chains_static, 205 chains_dynamic); 206 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 207 0, len, &cmd); 208 } else { 209 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver); 210 return -EOPNOTSUPP; 211 } 212 213 214 if (ret) 215 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 216 return ret; 217 } 218 219 /* 220 * Send a command to add a PHY context based on the current HW configuration. 221 */ 222 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 223 struct cfg80211_chan_def *chandef, 224 u8 chains_static, u8 chains_dynamic) 225 { 226 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 227 ctxt->ref); 228 lockdep_assert_held(&mvm->mutex); 229 230 ctxt->channel = chandef->chan; 231 232 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 233 chains_static, chains_dynamic, 234 FW_CTXT_ACTION_ADD); 235 } 236 237 /* 238 * Update the number of references to the given PHY context. This is valid only 239 * in case the PHY context was already created, i.e., its reference count > 0. 240 */ 241 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 242 { 243 lockdep_assert_held(&mvm->mutex); 244 ctxt->ref++; 245 } 246 247 /* 248 * Send a command to modify the PHY context based on the current HW 249 * configuration. Note that the function does not check that the configuration 250 * changed. 251 */ 252 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 253 struct cfg80211_chan_def *chandef, 254 u8 chains_static, u8 chains_dynamic) 255 { 256 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 257 258 lockdep_assert_held(&mvm->mutex); 259 260 if (fw_has_capa(&mvm->fw->ucode_capa, 261 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 262 ctxt->channel->band != chandef->chan->band) { 263 int ret; 264 265 /* ... remove it here ...*/ 266 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 267 chains_static, chains_dynamic, 268 FW_CTXT_ACTION_REMOVE); 269 if (ret) 270 return ret; 271 272 /* ... and proceed to add it again */ 273 action = FW_CTXT_ACTION_ADD; 274 } 275 276 ctxt->channel = chandef->chan; 277 ctxt->width = chandef->width; 278 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 279 chains_static, chains_dynamic, 280 action); 281 } 282 283 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 284 { 285 lockdep_assert_held(&mvm->mutex); 286 287 if (WARN_ON_ONCE(!ctxt)) 288 return; 289 290 ctxt->ref--; 291 292 /* 293 * Move unused phy's to a default channel. When the phy is moved the, 294 * fw will cleanup immediate quiet bit if it was previously set, 295 * otherwise we might not be able to reuse this phy. 296 */ 297 if (ctxt->ref == 0) { 298 struct ieee80211_channel *chan; 299 struct cfg80211_chan_def chandef; 300 struct ieee80211_supported_band *sband = NULL; 301 enum nl80211_band band = NL80211_BAND_2GHZ; 302 303 while (!sband && band < NUM_NL80211_BANDS) 304 sband = mvm->hw->wiphy->bands[band++]; 305 306 if (WARN_ON(!sband)) 307 return; 308 309 chan = &sband->channels[0]; 310 311 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); 312 iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); 313 } 314 } 315 316 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 317 struct ieee80211_vif *vif) 318 { 319 unsigned long *data = _data; 320 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 321 322 if (!mvmvif->phy_ctxt) 323 return; 324 325 if (vif->type == NL80211_IFTYPE_STATION || 326 vif->type == NL80211_IFTYPE_AP) 327 __set_bit(mvmvif->phy_ctxt->id, data); 328 } 329 330 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 331 { 332 unsigned long phy_ctxt_counter = 0; 333 334 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 335 IEEE80211_IFACE_ITER_NORMAL, 336 iwl_mvm_binding_iterator, 337 &phy_ctxt_counter); 338 339 return hweight8(phy_ctxt_counter); 340 } 341