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 /* From version 3, RLC is offloaded to firmware, so the driver no 163 * longer needs to send cmd.rlc, note that we are not using any 164 * other fields in the command - don't send it. 165 */ 166 if (iwl_mvm_has_rlc_offload(mvm) || ctxt->rlc_disabled) 167 return 0; 168 169 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, 170 RLC_CONFIG_CMD), 0) < 2) 171 return 0; 172 173 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_DRIVER_FORCE != 174 PHY_RX_CHAIN_DRIVER_FORCE_MSK); 175 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_VALID != 176 PHY_RX_CHAIN_VALID_MSK); 177 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE != 178 PHY_RX_CHAIN_FORCE_SEL_MSK); 179 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_FORCE_MIMO != 180 PHY_RX_CHAIN_FORCE_MIMO_SEL_MSK); 181 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_COUNT != PHY_RX_CHAIN_CNT_MSK); 182 BUILD_BUG_ON(IWL_RLC_CHAIN_INFO_MIMO_COUNT != 183 PHY_RX_CHAIN_MIMO_CNT_MSK); 184 185 iwl_mvm_phy_ctxt_set_rxchain(mvm, ctxt, &cmd.rlc.rx_chain_info, 186 chains_static, chains_dynamic); 187 188 IWL_DEBUG_FW(mvm, "Send RLC command: phy=%d, rx_chain_info=0x%x\n", 189 ctxt->id, cmd.rlc.rx_chain_info); 190 191 return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(RLC_CONFIG_CMD, 192 DATA_PATH_GROUP, 2), 193 0, sizeof(cmd), &cmd); 194 } 195 196 /* 197 * Send a command to apply the current phy configuration. The command is send 198 * only if something in the configuration changed: in case that this is the 199 * first time that the phy configuration is applied or in case that the phy 200 * configuration changed from the previous apply. 201 */ 202 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 203 struct iwl_mvm_phy_ctxt *ctxt, 204 const struct cfg80211_chan_def *chandef, 205 const struct cfg80211_chan_def *ap, 206 u8 chains_static, u8 chains_dynamic, 207 u32 action) 208 { 209 int ret; 210 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_CONTEXT_CMD, 1); 211 212 if (ver < 5 || !ap || !ap->chan) 213 ap = NULL; 214 215 if (ver >= 3 && ver <= 6) { 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 if (ap) { 227 cmd.sbb_bandwidth = iwl_mvm_get_channel_width(ap); 228 cmd.sbb_ctrl_channel_loc = iwl_mvm_get_ctrl_pos(ap); 229 } 230 231 if (ver == 6) 232 cmd.puncture_mask = cpu_to_le16(chandef->punctured); 233 234 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 235 0, sizeof(cmd), &cmd); 236 } else if (ver < 3) { 237 struct iwl_phy_context_cmd_v1 cmd = {}; 238 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); 239 240 /* Set the command header fields */ 241 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, 242 (struct iwl_phy_context_cmd *)&cmd, 243 action); 244 245 /* Set the command data */ 246 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, ctxt, &cmd, chandef, 247 chains_static, 248 chains_dynamic); 249 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 250 0, len, &cmd); 251 } else { 252 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver); 253 return -EOPNOTSUPP; 254 } 255 256 257 if (ret) { 258 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 259 return ret; 260 } 261 262 if (action != FW_CTXT_ACTION_REMOVE) 263 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 264 chains_dynamic); 265 266 return 0; 267 } 268 269 /* 270 * Send a command to add a PHY context based on the current HW configuration. 271 */ 272 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 273 const struct cfg80211_chan_def *chandef, 274 const struct cfg80211_chan_def *ap, 275 u8 chains_static, u8 chains_dynamic) 276 { 277 int ret; 278 279 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 280 ctxt->ref); 281 lockdep_assert_held(&mvm->mutex); 282 283 ctxt->channel = chandef->chan; 284 ctxt->width = chandef->width; 285 ctxt->center_freq1 = chandef->center_freq1; 286 287 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap, 288 chains_static, chains_dynamic, 289 FW_CTXT_ACTION_ADD); 290 291 if (ret) 292 return ret; 293 294 ctxt->ref++; 295 296 return 0; 297 } 298 299 /* 300 * Update the number of references to the given PHY context. This is valid only 301 * in case the PHY context was already created, i.e., its reference count > 0. 302 */ 303 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 304 { 305 lockdep_assert_held(&mvm->mutex); 306 307 /* If we were taking the first ref, we should have 308 * called iwl_mvm_phy_ctxt_add. 309 */ 310 WARN_ON(!ctxt->ref); 311 ctxt->ref++; 312 } 313 314 /* 315 * Send a command to modify the PHY context based on the current HW 316 * configuration. Note that the function does not check that the configuration 317 * changed. 318 */ 319 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 320 const struct cfg80211_chan_def *chandef, 321 const struct cfg80211_chan_def *ap, 322 u8 chains_static, u8 chains_dynamic) 323 { 324 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 325 326 lockdep_assert_held(&mvm->mutex); 327 328 if (WARN_ON_ONCE(!ctxt->ref)) 329 return -EINVAL; 330 331 if (iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(DATA_PATH_GROUP, 332 RLC_CONFIG_CMD), 0) >= 2 && 333 ctxt->channel == chandef->chan && 334 ctxt->width == chandef->width && 335 ctxt->center_freq1 == chandef->center_freq1) 336 return iwl_mvm_phy_send_rlc(mvm, ctxt, chains_static, 337 chains_dynamic); 338 339 if (fw_has_capa(&mvm->fw->ucode_capa, 340 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 341 ctxt->channel->band != chandef->chan->band) { 342 int ret; 343 344 /* ... remove it here ...*/ 345 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, NULL, 346 chains_static, chains_dynamic, 347 FW_CTXT_ACTION_REMOVE); 348 if (ret) 349 return ret; 350 351 /* ... and proceed to add it again */ 352 action = FW_CTXT_ACTION_ADD; 353 } 354 355 ctxt->channel = chandef->chan; 356 ctxt->width = chandef->width; 357 ctxt->center_freq1 = chandef->center_freq1; 358 359 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, ap, 360 chains_static, chains_dynamic, 361 action); 362 } 363 364 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 365 { 366 struct cfg80211_chan_def chandef; 367 lockdep_assert_held(&mvm->mutex); 368 369 if (WARN_ON_ONCE(!ctxt)) 370 return; 371 372 ctxt->ref--; 373 374 if (ctxt->ref) 375 return; 376 377 cfg80211_chandef_create(&chandef, ctxt->channel, NL80211_CHAN_NO_HT); 378 379 iwl_mvm_phy_ctxt_apply(mvm, ctxt, &chandef, NULL, 1, 1, 380 FW_CTXT_ACTION_REMOVE); 381 } 382 383 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 384 struct ieee80211_vif *vif) 385 { 386 unsigned long *data = _data; 387 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 388 389 if (!mvmvif->deflink.phy_ctxt) 390 return; 391 392 if (vif->type == NL80211_IFTYPE_STATION || 393 vif->type == NL80211_IFTYPE_AP) 394 __set_bit(mvmvif->deflink.phy_ctxt->id, data); 395 } 396 397 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 398 { 399 unsigned long phy_ctxt_counter = 0; 400 401 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 402 IEEE80211_IFACE_ITER_NORMAL, 403 iwl_mvm_binding_iterator, 404 &phy_ctxt_counter); 405 406 return hweight8(phy_ctxt_counter); 407 } 408