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 *rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) << 103 PHY_RX_CHAIN_VALID_POS); 104 *rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS); 105 *rxchain_info |= cpu_to_le32(active_cnt << 106 PHY_RX_CHAIN_MIMO_CNT_POS); 107 #ifdef CONFIG_IWLWIFI_DEBUGFS 108 if (unlikely(mvm->dbgfs_rx_phyinfo)) 109 *rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo); 110 #endif 111 } 112 113 /* 114 * Add the phy configuration to the PHY context command 115 */ 116 static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm, 117 struct iwl_mvm_phy_ctxt *ctxt, 118 struct iwl_phy_context_cmd_v1 *cmd, 119 struct cfg80211_chan_def *chandef, 120 u8 chains_static, u8 chains_dynamic) 121 { 122 struct iwl_phy_context_cmd_tail *tail = 123 iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci); 124 125 /* Set the channel info data */ 126 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 127 128 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &tail->rxchain_info, 129 chains_static, chains_dynamic); 130 131 tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 132 } 133 134 /* 135 * Add the phy configuration to the PHY context command 136 */ 137 static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm, 138 struct iwl_mvm_phy_ctxt *ctxt, 139 struct iwl_phy_context_cmd *cmd, 140 struct cfg80211_chan_def *chandef, 141 u8 chains_static, u8 chains_dynamic) 142 { 143 cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm, 144 chandef->chan->band)); 145 146 /* Set the channel info data */ 147 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 148 149 /* we only support RLC command version 2 */ 150 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) < 2) 151 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd->rxchain_info, 152 chains_static, chains_dynamic); 153 } 154 155 int iwl_mvm_phy_send_rlc(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 156 u8 chains_static, u8 chains_dynamic) 157 { 158 struct iwl_rlc_config_cmd cmd = { 159 .phy_id = cpu_to_le32(ctxt->id), 160 }; 161 162 if (ctxt->rlc_disabled) 163 return 0; 164 165 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, 166 RLC_CONFIG_CMD), 0) < 2) 167 return 0; 168 169 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE != 170 PHY_RX_CHAIN_DRIVER_FORCE_MSK); 171 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID != 172 PHY_RX_CHAIN_VALID_MSK); 173 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE != 174 PHY_RX_CHAIN_FORCE_SEL_MSK); 175 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO != 176 PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK); 177 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK); 178 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT != 179 PHY_RX_CHAIN_MIMO_CNT_MSK); 180 181 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info, 182 chains_static, chains_dynamic); 183 184 return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD, 185 DATA_PATH_GROUP, 2), 186 0, sizeof(cmd), &cmd); 187 } 188 189 /* 190 * Send a command to apply the current phy configuration. The command is send 191 * only if something in the configuration changed: in case that this is the 192 * first time that the phy configuration is applied or in case that the phy 193 * configuration changed from the previous apply. 194 */ 195 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 196 struct iwl_mvm_phy_ctxt *ctxt, 197 struct cfg80211_chan_def *chandef, 198 u8 chains_static, u8 chains_dynamic, 199 u32 action) 200 { 201 int ret; 202 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1); 203 204 if (ver == 3 || ver == 4) { 205 struct iwl_phy_context_cmd cmd = {}; 206 207 /* Set the command header fields */ 208 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action); 209 210 /* Set the command data */ 211 iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef, 212 chains_static, 213 chains_dynamic); 214 215 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 216 0, sizeof(cmd), &cmd); 217 } else if (ver < 3) { 218 struct iwl_phy_context_cmd_v1 cmd = {}; 219 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); 220 221 /* Set the command header fields */ 222 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, 223 (struct iwl_phy_context_cmd *)&cmd, 224 action); 225 226 /* Set the command data */ 227 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef, 228 chains_static, 229 chains_dynamic); 230 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 231 0, len, &cmd); 232 } else { 233 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver); 234 return -EOPNOTSUPP; 235 } 236 237 238 if (ret) { 239 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 240 return ret; 241 } 242 243 if (action != FW_CTXT_ACTION_REMOVE) 244 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 245 chains_dynamic); 246 247 return 0; 248 } 249 250 /* 251 * Send a command to add a PHY context based on the current HW configuration. 252 */ 253 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 254 struct cfg80211_chan_def *chandef, 255 u8 chains_static, u8 chains_dynamic) 256 { 257 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 258 ctxt->ref); 259 lockdep_assert_held(&mvm->mutex); 260 261 ctxt->channel = chandef->chan; 262 ctxt->width = chandef->width; 263 ctxt->center_freq1 = chandef->center_freq1; 264 265 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 266 chains_static, chains_dynamic, 267 FW_CTXT_ACTION_ADD); 268 } 269 270 /* 271 * Update the number of references to the given PHY context. This is valid only 272 * in case the PHY context was already created, i.e., its reference count > 0. 273 */ 274 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 275 { 276 lockdep_assert_held(&mvm->mutex); 277 ctxt->ref++; 278 } 279 280 /* 281 * Send a command to modify the PHY context based on the current HW 282 * configuration. Note that the function does not check that the configuration 283 * changed. 284 */ 285 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 286 struct cfg80211_chan_def *chandef, 287 u8 chains_static, u8 chains_dynamic) 288 { 289 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 290 291 lockdep_assert_held(&mvm->mutex); 292 293 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, RLC_CONFIG_CMD), 0) >= 2 && 294 ctxt->channel == chandef->chan && 295 ctxt->width == chandef->width && 296 ctxt->center_freq1 == chandef->center_freq1) 297 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 298 chains_dynamic); 299 300 if (fw_has_capa(&mvm->fw->ucode_capa, 301 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 302 ctxt->channel->band != chandef->chan->band) { 303 int ret; 304 305 /* ... remove it here ...*/ 306 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 307 chains_static, chains_dynamic, 308 FW_CTXT_ACTION_REMOVE); 309 if (ret) 310 return ret; 311 312 /* ... and proceed to add it again */ 313 action = FW_CTXT_ACTION_ADD; 314 } 315 316 ctxt->channel = chandef->chan; 317 ctxt->width = chandef->width; 318 ctxt->center_freq1 = chandef->center_freq1; 319 320 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 321 chains_static, chains_dynamic, 322 action); 323 } 324 325 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 326 { 327 lockdep_assert_held(&mvm->mutex); 328 329 if (WARN_ON_ONCE(!ctxt)) 330 return; 331 332 ctxt->ref--; 333 334 /* 335 * Move unused phy's to a default channel. When the phy is moved the, 336 * fw will cleanup immediate quiet bit if it was previously set, 337 * otherwise we might not be able to reuse this phy. 338 */ 339 if (ctxt->ref == 0) { 340 struct ieee80211_channel *chan = NULL; 341 struct cfg80211_chan_def chandef; 342 struct ieee80211_supported_band *sband; 343 enum nl80211_band band; 344 int channel; 345 346 for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) { 347 sband = mvm->hw->wiphy->bands[band]; 348 349 if (!sband) 350 continue; 351 352 for (channel = 0; channel < sband->n_channels; channel++) 353 if (!(sband->channels[channel].flags & 354 IEEE80211_CHAN_DISABLED)) { 355 chan = &sband->channels[channel]; 356 break; 357 } 358 359 if (chan) 360 break; 361 } 362 363 if (WARN_ON(!chan)) 364 return; 365 366 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); 367 iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); 368 } 369 } 370 371 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 372 struct ieee80211_vif *vif) 373 { 374 unsigned long *data = _data; 375 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 376 377 if (!mvmvif->deflink.phy_ctxt) 378 return; 379 380 if (vif->type == NL80211_IFTYPE_STATION || 381 vif->type == NL80211_IFTYPE_AP) 382 __set_bit(mvmvif->deflink.phy_ctxt->id, data); 383 } 384 385 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 386 { 387 unsigned long phy_ctxt_counter = 0; 388 389 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 390 IEEE80211_IFACE_ITER_NORMAL, 391 iwl_mvm_binding_iterator, 392 &phy_ctxt_counter); 393 394 return hweight8(phy_ctxt_counter); 395 } 396