| /****************************************************************************** |
| * |
| * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
| * Copyright(c) 2018 Intel Corporation |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| *****************************************************************************/ |
| |
| #include <net/mac80211.h> |
| #include "fw-api.h" |
| #include "mvm.h" |
| |
| /* Maps the driver specific channel width definition to the fw values */ |
| uint8_t iwl_mvm_get_channel_width(struct cfg80211_chan_def* chandef) { |
| switch (chandef->width) { |
| case NL80211_CHAN_WIDTH_20_NOHT: |
| case NL80211_CHAN_WIDTH_20: |
| return PHY_VHT_CHANNEL_MODE20; |
| case NL80211_CHAN_WIDTH_40: |
| return PHY_VHT_CHANNEL_MODE40; |
| case NL80211_CHAN_WIDTH_80: |
| return PHY_VHT_CHANNEL_MODE80; |
| case NL80211_CHAN_WIDTH_160: |
| return PHY_VHT_CHANNEL_MODE160; |
| default: |
| WARN(1, "Invalid channel width=%u", chandef->width); |
| return PHY_VHT_CHANNEL_MODE20; |
| } |
| } |
| |
| /* |
| * Maps the driver specific control channel position (relative to the center |
| * freq) definitions to the the fw values |
| */ |
| uint8_t iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def* chandef) { |
| switch (chandef->chan->center_freq - chandef->center_freq1) { |
| case -70: |
| return PHY_VHT_CTRL_POS_4_BELOW; |
| case -50: |
| return PHY_VHT_CTRL_POS_3_BELOW; |
| case -30: |
| return PHY_VHT_CTRL_POS_2_BELOW; |
| case -10: |
| return PHY_VHT_CTRL_POS_1_BELOW; |
| case 10: |
| return PHY_VHT_CTRL_POS_1_ABOVE; |
| case 30: |
| return PHY_VHT_CTRL_POS_2_ABOVE; |
| case 50: |
| return PHY_VHT_CTRL_POS_3_ABOVE; |
| case 70: |
| return PHY_VHT_CTRL_POS_4_ABOVE; |
| default: |
| WARN(1, "Invalid channel definition"); |
| case 0: |
| /* |
| * The FW is expected to check the control channel position only |
| * when in HT/VHT and the channel width is not 20MHz. Return |
| * this value as the default one. |
| */ |
| return PHY_VHT_CTRL_POS_1_BELOW; |
| } |
| } |
| |
| /* |
| * Construct the generic fields of the PHY context command |
| */ |
| static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt* ctxt, struct iwl_phy_context_cmd* cmd, |
| uint32_t action, uint32_t apply_time) { |
| memset(cmd, 0, sizeof(struct iwl_phy_context_cmd)); |
| |
| cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id, ctxt->color)); |
| cmd->action = cpu_to_le32(action); |
| cmd->apply_time = cpu_to_le32(apply_time); |
| } |
| |
| /* |
| * Add the phy configuration to the PHY context command |
| */ |
| static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm* mvm, struct iwl_phy_context_cmd* cmd, |
| struct cfg80211_chan_def* chandef, uint8_t chains_static, |
| uint8_t chains_dynamic) { |
| uint8_t active_cnt, idle_cnt; |
| |
| /* Set the channel info data */ |
| cmd->ci.band = (chandef->chan->band == NL80211_BAND_2GHZ ? PHY_BAND_24 : PHY_BAND_5); |
| |
| cmd->ci.channel = chandef->chan->hw_value; |
| cmd->ci.width = iwl_mvm_get_channel_width(chandef); |
| cmd->ci.ctrl_pos = iwl_mvm_get_ctrl_pos(chandef); |
| |
| /* Set rx the chains */ |
| idle_cnt = chains_static; |
| active_cnt = chains_dynamic; |
| |
| /* In scenarios where we only ever use a single-stream rates, |
| * i.e. legacy 11b/g/a associations, single-stream APs or even |
| * static SMPS, enable both chains to get diversity, improving |
| * the case where we're far enough from the AP that attenuation |
| * between the two antennas is sufficiently different to impact |
| * performance. |
| */ |
| if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) { |
| idle_cnt = 2; |
| active_cnt = 2; |
| } |
| |
| cmd->rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) << PHY_RX_CHAIN_VALID_POS); |
| cmd->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS); |
| cmd->rxchain_info |= cpu_to_le32(active_cnt << PHY_RX_CHAIN_MIMO_CNT_POS); |
| #ifdef CPTCFG_IWLWIFI_DEBUGFS |
| if (unlikely(mvm->dbgfs_rx_phyinfo)) { cmd->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo); } |
| #endif |
| |
| cmd->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); |
| } |
| |
| /* |
| * Send a command to apply the current phy configuration. The command is send |
| * only if something in the configuration changed: in case that this is the |
| * first time that the phy configuration is applied or in case that the phy |
| * configuration changed from the previous apply. |
| */ |
| static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm* mvm, struct iwl_mvm_phy_ctxt* ctxt, |
| struct cfg80211_chan_def* chandef, uint8_t chains_static, |
| uint8_t chains_dynamic, uint32_t action, uint32_t apply_time) { |
| struct iwl_phy_context_cmd cmd; |
| int ret; |
| |
| /* Set the command header fields */ |
| iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action, apply_time); |
| |
| /* Set the command data */ |
| iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef, chains_static, chains_dynamic); |
| |
| ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, 0, sizeof(struct iwl_phy_context_cmd), &cmd); |
| if (ret) { IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); } |
| return ret; |
| } |
| |
| /* |
| * Send a command to add a PHY context based on the current HW configuration. |
| */ |
| int iwl_mvm_phy_ctxt_add(struct iwl_mvm* mvm, struct iwl_mvm_phy_ctxt* ctxt, |
| struct cfg80211_chan_def* chandef, uint8_t chains_static, |
| uint8_t chains_dynamic) { |
| WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && ctxt->ref); |
| lockdep_assert_held(&mvm->mutex); |
| |
| ctxt->channel = chandef->chan; |
| |
| #ifdef CPTCFG_IWLWIFI_FRQ_MGR |
| ctxt->fm_tx_power_limit = IWL_DEFAULT_MAX_TX_POWER; |
| #endif |
| |
| return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, chains_static, chains_dynamic, |
| FW_CTXT_ACTION_ADD, 0); |
| } |
| |
| /* |
| * Update the number of references to the given PHY context. This is valid only |
| * in case the PHY context was already created, i.e., its reference count > 0. |
| */ |
| void iwl_mvm_phy_ctxt_ref(struct iwl_mvm* mvm, struct iwl_mvm_phy_ctxt* ctxt) { |
| lockdep_assert_held(&mvm->mutex); |
| ctxt->ref++; |
| } |
| |
| /* |
| * Send a command to modify the PHY context based on the current HW |
| * configuration. Note that the function does not check that the configuration |
| * changed. |
| */ |
| int iwl_mvm_phy_ctxt_changed(struct iwl_mvm* mvm, struct iwl_mvm_phy_ctxt* ctxt, |
| struct cfg80211_chan_def* chandef, uint8_t chains_static, |
| uint8_t chains_dynamic) { |
| enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && |
| ctxt->channel->band != chandef->chan->band) { |
| int ret; |
| |
| /* ... remove it here ...*/ |
| ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, chains_static, chains_dynamic, |
| FW_CTXT_ACTION_REMOVE, 0); |
| if (ret) { return ret; } |
| |
| /* ... and proceed to add it again */ |
| action = FW_CTXT_ACTION_ADD; |
| } |
| |
| ctxt->channel = chandef->chan; |
| ctxt->width = chandef->width; |
| return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, chains_static, chains_dynamic, action, 0); |
| } |
| |
| void iwl_mvm_phy_ctxt_unref(struct iwl_mvm* mvm, struct iwl_mvm_phy_ctxt* ctxt) { |
| lockdep_assert_held(&mvm->mutex); |
| |
| if (WARN_ON_ONCE(!ctxt)) { return; } |
| |
| ctxt->ref--; |
| |
| /* |
| * Move unused phy's to a default channel. When the phy is moved the, |
| * fw will cleanup immediate quiet bit if it was previously set, |
| * otherwise we might not be able to reuse this phy. |
| */ |
| if (ctxt->ref == 0) { |
| struct ieee80211_channel* chan; |
| struct cfg80211_chan_def chandef; |
| |
| chan = &mvm->hw->wiphy->bands[NL80211_BAND_2GHZ]->channels[0]; |
| cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); |
| iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); |
| } |
| } |
| |
| static void iwl_mvm_binding_iterator(void* _data, uint8_t* mac, struct ieee80211_vif* vif) { |
| unsigned long* data = _data; |
| struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| |
| if (!mvmvif->phy_ctxt) { return; } |
| |
| if (vif->type == NL80211_IFTYPE_STATION || vif->type == NL80211_IFTYPE_AP) { |
| __set_bit(mvmvif->phy_ctxt->id, data); |
| } |
| } |
| |
| int iwl_mvm_phy_ctx_count(struct iwl_mvm* mvm) { |
| unsigned long phy_ctxt_counter = 0; |
| |
| ieee80211_iterate_active_interfaces_atomic(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, |
| iwl_mvm_binding_iterator, &phy_ctxt_counter); |
| |
| return hweight8(phy_ctxt_counter); |
| } |
