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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright (C) 2012-2014, 2018-2024 Intel Corporation4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH5 * Copyright (C) 2017 Intel Deutschland GmbH6 */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 */12u8 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 center34 * freq) definitions to the the fw values35 */36u8 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 only45 * when in HT/VHT and the channel width is not 20MHz. Return46 * 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 is55 * IWL_PHY_CTRL_POS_ABOVE, so shift bit 2 up to land in56 * 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 command68 */69static 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 78static 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 even92 * static SMPS, enable both chains to get diversity, improving93 * the case where we're far enough from the AP that attenuation94 * between the two antennas is sufficiently different to impact95 * 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_DEBUGFS108 if (unlikely(mvm->dbgfs_rx_phyinfo))109 *rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);110#endif111}112 113/*114 * Add the phy configuration to the PHY context command115 */116static 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 command136 */137static 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 155int 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 no163 * longer needs to send cmd.rlc, note that we are not using any164 * 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 send198 * only if something in the configuration changed: in case that this is the199 * first time that the phy configuration is applied or in case that the phy200 * configuration changed from the previous apply.201 */202static 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 */272int 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 only301 * in case the PHY context was already created, i.e., its reference count > 0.302 */303void 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 have308 * 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 HW316 * configuration. Note that the function does not check that the configuration317 * changed.318 */319int 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 364void 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 383static 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 397int 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