drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c

   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 }