1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2023 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 IWL_PHY_CHANNEL_MODE20; 18 case NL80211_CHAN_WIDTH_40: 19 return IWL_PHY_CHANNEL_MODE40; 20 case NL80211_CHAN_WIDTH_80: 21 return IWL_PHY_CHANNEL_MODE80; 22 case NL80211_CHAN_WIDTH_160: 23 return IWL_PHY_CHANNEL_MODE160; 24 case NL80211_CHAN_WIDTH_320: 25 return IWL_PHY_CHANNEL_MODE320; 26 default: 27 WARN(1, "Invalid channel width=%u", chandef->width); 28 return IWL_PHY_CHANNEL_MODE20; 29 } 30 } 31 32 /* 33 * Maps the driver specific control channel position (relative to the center 34 * freq) definitions to the the fw values 35 */ 36 u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef) 37 { 38 int offs = chandef->chan->center_freq - chandef->center_freq1; 39 int abs_offs = abs(offs); 40 u8 ret; 41 42 if (offs == 0) { 43 /* 44 * The FW is expected to check the control channel position only 45 * when in HT/VHT and the channel width is not 20MHz. Return 46 * this value as the default one. 47 */ 48 return 0; 49 } 50 51 /* this results in a value 0-7, i.e. fitting into 0b0111 */ 52 ret = (abs_offs - 10) / 20; 53 /* 54 * But we need the value to be in 0b1011 because 0b0100 is 55 * IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in 56 * IWL_PHY_CTRL_POS_OFFS_EXT (0b1000) 57 */ 58 ret = (ret & IWL_PHY_CTRL_POS_OFFS_MSK) | 59 ((ret & BIT(2)) << 1); 60 /* and add the above bit */ 61 ret |= (offs > 0) * IWL_PHY_CTRL_POS_ABOVE; 62 63 return ret; 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, 155 chandef->chan->band)); 156 157 /* Set the channel info data */ 158 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 159 160 /* we only support RLC command version 2 */ 161 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2) 162 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info, 163 chains_static, chains_dynamic); 164 } 165 166 int iwl_mvm_phy_send_rlc(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 167 u8 chains_static, u8 chains_dynamic) 168 { 169 struct iwl_rlc_config_cmd cmd = { 170 .phy_id = cpu_to_le32(ctxt->id), 171 }; 172 173 if (ctxt->rlc_disabled) 174 return 0; 175 176 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, 177 RLC_CONFIG_CMD), 0) < 2) 178 return 0; 179 180 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE != 181 PHY_RX_CHAIN_DRIVER_FORCE_MSK); 182 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID != 183 PHY_RX_CHAIN_VALID_MSK); 184 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE != 185 PHY_RX_CHAIN_FORCE_SEL_MSK); 186 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO != 187 PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK); 188 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK); 189 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT != 190 PHY_RX_CHAIN_MIMO_CNT_MSK); 191 192 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info, 193 chains_static, chains_dynamic); 194 195 return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD, 196 DATA_PATH_GROUP, 2), 197 0, sizeof(cmd), &cmd); 198 } 199 200 /* 201 * Send a command to apply the current phy configuration. The command is send 202 * only if something in the configuration changed: in case that this is the 203 * first time that the phy configuration is applied or in case that the phy 204 * configuration changed from the previous apply. 205 */ 206 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 207 struct iwl_mvm_phy_ctxt *ctxt, 208 struct cfg80211_chan_def *chandef, 209 u8 chains_static, u8 chains_dynamic, 210 u32 action) 211 { 212 int ret; 213 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1); 214 215 if (ver == 3 || ver == 4) { 216 struct iwl_phy_context_cmd cmd = {}; 217 218 /* Set the command header fields */ 219 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action); 220 221 /* Set the command data */ 222 iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef, 223 chains_static, 224 chains_dynamic); 225 226 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 227 0, sizeof(cmd), &cmd); 228 } else if (ver < 3) { 229 struct iwl_phy_context_cmd_v1 cmd = {}; 230 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); 231 232 /* Set the command header fields */ 233 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, 234 (struct iwl_phy_context_cmd *)&cmd, 235 action); 236 237 /* Set the command data */ 238 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef, 239 chains_static, 240 chains_dynamic); 241 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 242 0, len, &cmd); 243 } else { 244 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver); 245 return -EOPNOTSUPP; 246 } 247 248 249 if (ret) { 250 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 251 return ret; 252 } 253 254 if (action != FW_CTXT_ACTION_REMOVE) 255 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 256 chains_dynamic); 257 258 return 0; 259 } 260 261 /* 262 * Send a command to add a PHY context based on the current HW configuration. 263 */ 264 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 265 struct cfg80211_chan_def *chandef, 266 u8 chains_static, u8 chains_dynamic) 267 { 268 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 269 ctxt->ref); 270 lockdep_assert_held(&mvm->mutex); 271 272 ctxt->channel = chandef->chan; 273 ctxt->width = chandef->width; 274 ctxt->center_freq1 = chandef->center_freq1; 275 276 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 277 chains_static, chains_dynamic, 278 FW_CTXT_ACTION_ADD); 279 } 280 281 /* 282 * Update the number of references to the given PHY context. This is valid only 283 * in case the PHY context was already created, i.e., its reference count > 0. 284 */ 285 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 286 { 287 lockdep_assert_held(&mvm->mutex); 288 ctxt->ref++; 289 } 290 291 /* 292 * Send a command to modify the PHY context based on the current HW 293 * configuration. Note that the function does not check that the configuration 294 * changed. 295 */ 296 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 297 struct cfg80211_chan_def *chandef, 298 u8 chains_static, u8 chains_dynamic) 299 { 300 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 301 302 lockdep_assert_held(&mvm->mutex); 303 304 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) >= 2 && 305 ctxt->channel == chandef->chan && 306 ctxt->width == chandef->width && 307 ctxt->center_freq1 == chandef->center_freq1) 308 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 309 chains_dynamic); 310 311 if (fw_has_capa(&mvm->fw->ucode_capa, 312 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 313 ctxt->channel->band != chandef->chan->band) { 314 int ret; 315 316 /* ... remove it here ...*/ 317 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 318 chains_static, chains_dynamic, 319 FW_CTXT_ACTION_REMOVE); 320 if (ret) 321 return ret; 322 323 /* ... and proceed to add it again */ 324 action = FW_CTXT_ACTION_ADD; 325 } 326 327 ctxt->channel = chandef->chan; 328 ctxt->width = chandef->width; 329 ctxt->center_freq1 = chandef->center_freq1; 330 331 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 332 chains_static, chains_dynamic, 333 action); 334 } 335 336 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 337 { 338 lockdep_assert_held(&mvm->mutex); 339 340 if (WARN_ON_ONCE(!ctxt)) 341 return; 342 343 ctxt->ref--; 344 345 /* 346 * Move unused phy's to a default channel. When the phy is moved the, 347 * fw will cleanup immediate quiet bit if it was previously set, 348 * otherwise we might not be able to reuse this phy. 349 */ 350 if (ctxt->ref == 0) { 351 struct ieee80211_channel *chan = NULL; 352 struct cfg80211_chan_def chandef; 353 struct ieee80211_supported_band *sband; 354 enum nl80211_band band; 355 int channel; 356 357 for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) { 358 sband = mvm->hw->wiphy->bands[band]; 359 360 if (!sband) 361 continue; 362 363 for (channel = 0; channel < sband->n_channels; channel++) 364 if (!(sband->channels[channel].flags & 365 IEEE80211_CHAN_DISABLED)) { 366 chan = &sband->channels[channel]; 367 break; 368 } 369 370 if (chan) 371 break; 372 } 373 374 if (WARN_ON(!chan)) 375 return; 376 377 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); 378 iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); 379 } 380 } 381 382 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 383 struct ieee80211_vif *vif) 384 { 385 unsigned long *data = _data; 386 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 387 388 if (!mvmvif->deflink.phy_ctxt) 389 return; 390 391 if (vif->type == NL80211_IFTYPE_STATION || 392 vif->type == NL80211_IFTYPE_AP) 393 __set_bit(mvmvif->deflink.phy_ctxt->id, data); 394 } 395 396 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 397 { 398 unsigned long phy_ctxt_counter = 0; 399 400 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 401 IEEE80211_IFACE_ITER_NORMAL, 402 iwl_mvm_binding_iterator, 403 &phy_ctxt_counter); 404 405 return hweight8(phy_ctxt_counter); 406 } 407