1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2020 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 PHY_VHT_CHANNEL_MODE20; 18 case NL80211_CHAN_WIDTH_40: 19 return PHY_VHT_CHANNEL_MODE40; 20 case NL80211_CHAN_WIDTH_80: 21 return PHY_VHT_CHANNEL_MODE80; 22 case NL80211_CHAN_WIDTH_160: 23 return PHY_VHT_CHANNEL_MODE160; 24 default: 25 WARN(1, "Invalid channel width=%u", chandef->width); 26 return PHY_VHT_CHANNEL_MODE20; 27 } 28 } 29 30 /* 31 * Maps the driver specific control channel position (relative to the center 32 * freq) definitions to the the fw values 33 */ 34 u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef) 35 { 36 switch (chandef->chan->center_freq - chandef->center_freq1) { 37 case -70: 38 return PHY_VHT_CTRL_POS_4_BELOW; 39 case -50: 40 return PHY_VHT_CTRL_POS_3_BELOW; 41 case -30: 42 return PHY_VHT_CTRL_POS_2_BELOW; 43 case -10: 44 return PHY_VHT_CTRL_POS_1_BELOW; 45 case 10: 46 return PHY_VHT_CTRL_POS_1_ABOVE; 47 case 30: 48 return PHY_VHT_CTRL_POS_2_ABOVE; 49 case 50: 50 return PHY_VHT_CTRL_POS_3_ABOVE; 51 case 70: 52 return PHY_VHT_CTRL_POS_4_ABOVE; 53 default: 54 WARN(1, "Invalid channel definition"); 55 fallthrough; 56 case 0: 57 /* 58 * The FW is expected to check the control channel position only 59 * when in HT/VHT and the channel width is not 20MHz. Return 60 * this value as the default one. 61 */ 62 return PHY_VHT_CTRL_POS_1_BELOW; 63 } 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 __le32 *rxchain_info, 80 u8 chains_static, 81 u8 chains_dynamic) 82 { 83 u8 active_cnt, idle_cnt; 84 85 /* Set rx the chains */ 86 idle_cnt = chains_static; 87 active_cnt = chains_dynamic; 88 89 /* In scenarios where we only ever use a single-stream rates, 90 * i.e. legacy 11b/g/a associations, single-stream APs or even 91 * static SMPS, enable both chains to get diversity, improving 92 * the case where we're far enough from the AP that attenuation 93 * between the two antennas is sufficiently different to impact 94 * performance. 95 */ 96 if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) { 97 idle_cnt = 2; 98 active_cnt = 2; 99 } 100 101 *rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) << 102 PHY_RX_CHAIN_VALID_POS); 103 *rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS); 104 *rxchain_info |= cpu_to_le32(active_cnt << 105 PHY_RX_CHAIN_MIMO_CNT_POS); 106 #ifdef CONFIG_IWLWIFI_DEBUGFS 107 if (unlikely(mvm->dbgfs_rx_phyinfo)) 108 *rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo); 109 #endif 110 } 111 112 /* 113 * Add the phy configuration to the PHY context command 114 */ 115 static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm, 116 struct iwl_phy_context_cmd_v1 *cmd, 117 struct cfg80211_chan_def *chandef, 118 u8 chains_static, u8 chains_dynamic) 119 { 120 struct iwl_phy_context_cmd_tail *tail = 121 iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci); 122 123 /* Set the channel info data */ 124 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 125 126 iwl_mvm_phy_ctxt_set_rxchain(mvm, &tail->rxchain_info, 127 chains_static, chains_dynamic); 128 129 tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 130 } 131 132 /* 133 * Add the phy configuration to the PHY context command 134 */ 135 static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm, 136 struct iwl_phy_context_cmd *cmd, 137 struct cfg80211_chan_def *chandef, 138 u8 chains_static, u8 chains_dynamic) 139 { 140 cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm->fw, 141 chandef->chan->band)); 142 143 /* Set the channel info data */ 144 iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); 145 146 iwl_mvm_phy_ctxt_set_rxchain(mvm, &cmd->rxchain_info, 147 chains_static, chains_dynamic); 148 } 149 150 /* 151 * Send a command to apply the current phy configuration. The command is send 152 * only if something in the configuration changed: in case that this is the 153 * first time that the phy configuration is applied or in case that the phy 154 * configuration changed from the previous apply. 155 */ 156 static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, 157 struct iwl_mvm_phy_ctxt *ctxt, 158 struct cfg80211_chan_def *chandef, 159 u8 chains_static, u8 chains_dynamic, 160 u32 action) 161 { 162 int ret; 163 int ver = iwl_fw_lookup_cmd_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP, 164 PHY_CONTEXT_CMD, 1); 165 166 if (ver == 3) { 167 struct iwl_phy_context_cmd cmd = {}; 168 169 /* Set the command header fields */ 170 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action); 171 172 /* Set the command data */ 173 iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef, 174 chains_static, 175 chains_dynamic); 176 177 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 178 0, sizeof(cmd), &cmd); 179 } else if (ver < 3) { 180 struct iwl_phy_context_cmd_v1 cmd = {}; 181 u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); 182 183 /* Set the command header fields */ 184 iwl_mvm_phy_ctxt_cmd_hdr(ctxt, 185 (struct iwl_phy_context_cmd *)&cmd, 186 action); 187 188 /* Set the command data */ 189 iwl_mvm_phy_ctxt_cmd_data_v1(mvm, &cmd, chandef, 190 chains_static, 191 chains_dynamic); 192 ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 193 0, len, &cmd); 194 } else { 195 IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver); 196 return -EOPNOTSUPP; 197 } 198 199 200 if (ret) 201 IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); 202 return ret; 203 } 204 205 /* 206 * Send a command to add a PHY context based on the current HW configuration. 207 */ 208 int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 209 struct cfg80211_chan_def *chandef, 210 u8 chains_static, u8 chains_dynamic) 211 { 212 WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 213 ctxt->ref); 214 lockdep_assert_held(&mvm->mutex); 215 216 ctxt->channel = chandef->chan; 217 218 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 219 chains_static, chains_dynamic, 220 FW_CTXT_ACTION_ADD); 221 } 222 223 /* 224 * Update the number of references to the given PHY context. This is valid only 225 * in case the PHY context was already created, i.e., its reference count > 0. 226 */ 227 void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 228 { 229 lockdep_assert_held(&mvm->mutex); 230 ctxt->ref++; 231 } 232 233 /* 234 * Send a command to modify the PHY context based on the current HW 235 * configuration. Note that the function does not check that the configuration 236 * changed. 237 */ 238 int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, 239 struct cfg80211_chan_def *chandef, 240 u8 chains_static, u8 chains_dynamic) 241 { 242 enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; 243 244 lockdep_assert_held(&mvm->mutex); 245 246 if (fw_has_capa(&mvm->fw->ucode_capa, 247 IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && 248 ctxt->channel->band != chandef->chan->band) { 249 int ret; 250 251 /* ... remove it here ...*/ 252 ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 253 chains_static, chains_dynamic, 254 FW_CTXT_ACTION_REMOVE); 255 if (ret) 256 return ret; 257 258 /* ... and proceed to add it again */ 259 action = FW_CTXT_ACTION_ADD; 260 } 261 262 ctxt->channel = chandef->chan; 263 ctxt->width = chandef->width; 264 return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, 265 chains_static, chains_dynamic, 266 action); 267 } 268 269 void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) 270 { 271 lockdep_assert_held(&mvm->mutex); 272 273 if (WARN_ON_ONCE(!ctxt)) 274 return; 275 276 ctxt->ref--; 277 278 /* 279 * Move unused phy's to a default channel. When the phy is moved the, 280 * fw will cleanup immediate quiet bit if it was previously set, 281 * otherwise we might not be able to reuse this phy. 282 */ 283 if (ctxt->ref == 0) { 284 struct ieee80211_channel *chan; 285 struct cfg80211_chan_def chandef; 286 struct ieee80211_supported_band *sband = NULL; 287 enum nl80211_band band = NL80211_BAND_2GHZ; 288 289 while (!sband && band < NUM_NL80211_BANDS) 290 sband = mvm->hw->wiphy->bands[band++]; 291 292 if (WARN_ON(!sband)) 293 return; 294 295 chan = &sband->channels[0]; 296 297 cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); 298 iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); 299 } 300 } 301 302 static void iwl_mvm_binding_iterator(void *_data, u8 *mac, 303 struct ieee80211_vif *vif) 304 { 305 unsigned long *data = _data; 306 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 307 308 if (!mvmvif->phy_ctxt) 309 return; 310 311 if (vif->type == NL80211_IFTYPE_STATION || 312 vif->type == NL80211_IFTYPE_AP) 313 __set_bit(mvmvif->phy_ctxt->id, data); 314 } 315 316 int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) 317 { 318 unsigned long phy_ctxt_counter = 0; 319 320 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 321 IEEE80211_IFACE_ITER_NORMAL, 322 iwl_mvm_binding_iterator, 323 &phy_ctxt_counter); 324 325 return hweight8(phy_ctxt_counter); 326 } 327