1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2024 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(const 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(const 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 const 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 const 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 IWL_DEBUG_FW(mvm, "Send RLC command: phy=%d, rx_chain_info=0x%x\n", 185 ctxt->id, cmd.rlc.rx_chain_info); 186 187 return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD, 188 DATA_PATH_GROUP, 2), 189 0, sizeof(cmd), &cmd); 190 } 191 192 /* 193 * Send a command to apply the current phy configuration. The command is send 194 * only if something in the configuration changed: in case that this is the 195 * first time that the phy configuration is applied or in case that the phy 196 * configuration changed from the previous apply. 197 */ 198 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 199 struct iwl_mvm_phy_ctxt *ctxt, 200 const struct cfg80211_chan_def *chandef, 201 const struct cfg80211_chan_def *ap, 202 u8 chains_static, u8 chains_dynamic, 203 u32 action) 204 { 205 int ret; 206 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1); 207 208 if (ver < 5 || !ap || !ap->chan) 209 ap = NULL; 210 211 if (ver >= 3 && ver <= 6) { 212 struct iwl_phy_context_cmd cmd = {}; 213 214 /* Set the command header fields */ 215 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action); 216 217 /* Set the command data */ 218 iwl_mvm_phy_ctxt_cmd_data(mvm, ctxt, &cmd, chandef, 219 chains_static, 220 chains_dynamic); 221 222 if (ap) { 223 cmd.sbb_bandwidth = iwl_mvm_get_channel_width(ap); 224 cmd.sbb_ctrl_channel_loc = iwl_mvm_get_ctrl_pos(ap); 225 } 226 227 if (ver == 6) 228 cmd.puncture_mask = cpu_to_le16(chandef->punctured); 229 230 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 231 0, sizeof(cmd), &cmd); 232 } else if (ver < 3) { 233 struct iwl_phy_context_cmd_v1 cmd = {}; 234 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); 235 236 /* Set the command header fields */ 237 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, 238 (struct iwl_phy_context_cmd *)&cmd, 239 action); 240 241 /* Set the command data */ 242 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef, 243 chains_static, 244 chains_dynamic); 245 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 246 0, len, &cmd); 247 } else { 248 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver); 249 return -EOPNOTSUPP; 250 } 251 252 253 if (ret) { 254 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 255 return ret; 256 } 257 258 if (action != FW_CTXT_ACTION_REMOVE) 259 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 260 chains_dynamic); 261 262 return 0; 263 } 264 265 /* 266 * Send a command to add a PHY context based on the current HW configuration. 267 */ 268 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 269 const struct cfg80211_chan_def *chandef, 270 const struct cfg80211_chan_def *ap, 271 u8 chains_static, u8 chains_dynamic) 272 { 273 int ret; 274 275 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 276 ctxt->ref); 277 lockdep_assert_held(&mvm->mutex); 278 279 ctxt->channel = chandef->chan; 280 ctxt->width = chandef->width; 281 ctxt->center_freq1 = chandef->center_freq1; 282 283 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap, 284 chains_static, chains_dynamic, 285 FW_CTXT_ACTION_ADD); 286 287 if (ret) 288 return ret; 289 290 ctxt->ref++; 291 292 return 0; 293 } 294 295 /* 296 * Update the number of references to the given PHY context. This is valid only 297 * in case the PHY context was already created, i.e., its reference count > 0. 298 */ 299 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 300 { 301 lockdep_assert_held(&mvm->mutex); 302 303 /* If we were taking the first ref, we should have 304 * called iwl_mvm_phy_ctxt_add. 305 */ 306 WARN_ON(!ctxt->ref); 307 ctxt->ref++; 308 } 309 310 /* 311 * Send a command to modify the PHY context based on the current HW 312 * configuration. Note that the function does not check that the configuration 313 * changed. 314 */ 315 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 316 const struct cfg80211_chan_def *chandef, 317 const struct cfg80211_chan_def *ap, 318 u8 chains_static, u8 chains_dynamic) 319 { 320 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 321 322 lockdep_assert_held(&mvm->mutex); 323 324 if (WARN_ON_ONCE(!ctxt->ref)) 325 return -EINVAL; 326 327 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, 328 RLC_CONFIG_CMD), 0) >= 2 && 329 ctxt->channel == chandef->chan && 330 ctxt->width == chandef->width && 331 ctxt->center_freq1 == chandef->center_freq1) 332 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 333 chains_dynamic); 334 335 if (fw_has_capa(&mvm->fw->ucode_capa, 336 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 337 ctxt->channel->band != chandef->chan->band) { 338 int ret; 339 340 /* ... remove it here ...*/ 341 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, NULL, 342 chains_static, chains_dynamic, 343 FW_CTXT_ACTION_REMOVE); 344 if (ret) 345 return ret; 346 347 /* ... and proceed to add it again */ 348 action = FW_CTXT_ACTION_ADD; 349 } 350 351 ctxt->channel = chandef->chan; 352 ctxt->width = chandef->width; 353 ctxt->center_freq1 = chandef->center_freq1; 354 355 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap, 356 chains_static, chains_dynamic, 357 action); 358 } 359 360 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 361 { 362 struct cfg80211_chan_def chandef; 363 lockdep_assert_held(&mvm->mutex); 364 365 if (WARN_ON_ONCE(!ctxt)) 366 return; 367 368 ctxt->ref--; 369 370 if (ctxt->ref) 371 return; 372 373 cfg80211_chandef_create(&chandef, ctxt->channel, NL80211_CHAN_NO_HT); 374 375 iwl_mvm_phy_ctxt_apply(mvm, ctxt, &chandef, NULL, 1, 1, 376 FW_CTXT_ACTION_REMOVE); 377 } 378 379 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 380 struct ieee80211_vif *vif) 381 { 382 unsigned long *data = _data; 383 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 384 385 if (!mvmvif->deflink.phy_ctxt) 386 return; 387 388 if (vif->type == NL80211_IFTYPE_STATION || 389 vif->type == NL80211_IFTYPE_AP) 390 __set_bit(mvmvif->deflink.phy_ctxt->id, data); 391 } 392 393 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 394 { 395 unsigned long phy_ctxt_counter = 0; 396 397 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 398 IEEE80211_IFACE_ITER_NORMAL, 399 iwl_mvm_binding_iterator, 400 &phy_ctxt_counter); 401 402 return hweight8(phy_ctxt_counter); 403 } 404