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326 lines
8.9 KiB
326 lines
8.9 KiB
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
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/* |
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* Copyright (C) 2012-2014, 2018-2020 Intel Corporation |
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* Copyright (C) 2013-2014 Intel Mobile Communications GmbH |
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* Copyright (C) 2017 Intel Deutschland GmbH |
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*/ |
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#include <net/mac80211.h> |
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#include "fw-api.h" |
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#include "mvm.h" |
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/* Maps the driver specific channel width definition to the fw values */ |
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u8 iwl_mvm_get_channel_width(struct cfg80211_chan_def *chandef) |
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{ |
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switch (chandef->width) { |
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case NL80211_CHAN_WIDTH_20_NOHT: |
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case NL80211_CHAN_WIDTH_20: |
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return PHY_VHT_CHANNEL_MODE20; |
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case NL80211_CHAN_WIDTH_40: |
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return PHY_VHT_CHANNEL_MODE40; |
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case NL80211_CHAN_WIDTH_80: |
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return PHY_VHT_CHANNEL_MODE80; |
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case NL80211_CHAN_WIDTH_160: |
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return PHY_VHT_CHANNEL_MODE160; |
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default: |
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WARN(1, "Invalid channel width=%u", chandef->width); |
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return PHY_VHT_CHANNEL_MODE20; |
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} |
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} |
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/* |
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* Maps the driver specific control channel position (relative to the center |
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* freq) definitions to the the fw values |
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*/ |
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u8 iwl_mvm_get_ctrl_pos(struct cfg80211_chan_def *chandef) |
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{ |
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switch (chandef->chan->center_freq - chandef->center_freq1) { |
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case -70: |
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return PHY_VHT_CTRL_POS_4_BELOW; |
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case -50: |
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return PHY_VHT_CTRL_POS_3_BELOW; |
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case -30: |
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return PHY_VHT_CTRL_POS_2_BELOW; |
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case -10: |
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return PHY_VHT_CTRL_POS_1_BELOW; |
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case 10: |
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return PHY_VHT_CTRL_POS_1_ABOVE; |
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case 30: |
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return PHY_VHT_CTRL_POS_2_ABOVE; |
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case 50: |
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return PHY_VHT_CTRL_POS_3_ABOVE; |
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case 70: |
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return PHY_VHT_CTRL_POS_4_ABOVE; |
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default: |
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WARN(1, "Invalid channel definition"); |
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fallthrough; |
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case 0: |
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/* |
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* The FW is expected to check the control channel position only |
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* when in HT/VHT and the channel width is not 20MHz. Return |
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* this value as the default one. |
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*/ |
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return PHY_VHT_CTRL_POS_1_BELOW; |
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} |
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} |
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/* |
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* Construct the generic fields of the PHY context command |
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*/ |
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static void iwl_mvm_phy_ctxt_cmd_hdr(struct iwl_mvm_phy_ctxt *ctxt, |
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struct iwl_phy_context_cmd *cmd, |
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u32 action) |
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{ |
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cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(ctxt->id, |
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ctxt->color)); |
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cmd->action = cpu_to_le32(action); |
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} |
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static void iwl_mvm_phy_ctxt_set_rxchain(struct iwl_mvm *mvm, |
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__le32 *rxchain_info, |
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u8 chains_static, |
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u8 chains_dynamic) |
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{ |
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u8 active_cnt, idle_cnt; |
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/* Set rx the chains */ |
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idle_cnt = chains_static; |
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active_cnt = chains_dynamic; |
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/* In scenarios where we only ever use a single-stream rates, |
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* i.e. legacy 11b/g/a associations, single-stream APs or even |
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* static SMPS, enable both chains to get diversity, improving |
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* the case where we're far enough from the AP that attenuation |
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* between the two antennas is sufficiently different to impact |
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* performance. |
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*/ |
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if (active_cnt == 1 && iwl_mvm_rx_diversity_allowed(mvm)) { |
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idle_cnt = 2; |
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active_cnt = 2; |
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} |
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*rxchain_info = cpu_to_le32(iwl_mvm_get_valid_rx_ant(mvm) << |
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PHY_RX_CHAIN_VALID_POS); |
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*rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS); |
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*rxchain_info |= cpu_to_le32(active_cnt << |
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PHY_RX_CHAIN_MIMO_CNT_POS); |
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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if (unlikely(mvm->dbgfs_rx_phyinfo)) |
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*rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo); |
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#endif |
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} |
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/* |
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* Add the phy configuration to the PHY context command |
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*/ |
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static void iwl_mvm_phy_ctxt_cmd_data_v1(struct iwl_mvm *mvm, |
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struct iwl_phy_context_cmd_v1 *cmd, |
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struct cfg80211_chan_def *chandef, |
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u8 chains_static, u8 chains_dynamic) |
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{ |
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struct iwl_phy_context_cmd_tail *tail = |
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iwl_mvm_chan_info_cmd_tail(mvm, &cmd->ci); |
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/* Set the channel info data */ |
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iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); |
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iwl_mvm_phy_ctxt_set_rxchain(mvm, &tail->rxchain_info, |
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chains_static, chains_dynamic); |
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tail->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); |
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} |
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/* |
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* Add the phy configuration to the PHY context command |
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*/ |
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static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm, |
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struct iwl_phy_context_cmd *cmd, |
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struct cfg80211_chan_def *chandef, |
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u8 chains_static, u8 chains_dynamic) |
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{ |
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cmd->lmac_id = cpu_to_le32(iwl_mvm_get_lmac_id(mvm->fw, |
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chandef->chan->band)); |
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/* Set the channel info data */ |
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iwl_mvm_set_chan_info_chandef(mvm, &cmd->ci, chandef); |
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iwl_mvm_phy_ctxt_set_rxchain(mvm, &cmd->rxchain_info, |
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chains_static, chains_dynamic); |
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} |
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/* |
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* Send a command to apply the current phy configuration. The command is send |
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* only if something in the configuration changed: in case that this is the |
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* first time that the phy configuration is applied or in case that the phy |
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* configuration changed from the previous apply. |
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*/ |
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static int iwl_mvm_phy_ctxt_apply(struct iwl_mvm *mvm, |
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struct iwl_mvm_phy_ctxt *ctxt, |
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struct cfg80211_chan_def *chandef, |
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u8 chains_static, u8 chains_dynamic, |
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u32 action) |
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{ |
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int ret; |
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int ver = iwl_fw_lookup_cmd_ver(mvm->fw, IWL_ALWAYS_LONG_GROUP, |
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PHY_CONTEXT_CMD, 1); |
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if (ver == 3) { |
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struct iwl_phy_context_cmd cmd = {}; |
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/* Set the command header fields */ |
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iwl_mvm_phy_ctxt_cmd_hdr(ctxt, &cmd, action); |
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/* Set the command data */ |
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iwl_mvm_phy_ctxt_cmd_data(mvm, &cmd, chandef, |
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chains_static, |
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chains_dynamic); |
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ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, |
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0, sizeof(cmd), &cmd); |
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} else if (ver < 3) { |
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struct iwl_phy_context_cmd_v1 cmd = {}; |
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u16 len = sizeof(cmd) - iwl_mvm_chan_info_padding(mvm); |
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/* Set the command header fields */ |
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iwl_mvm_phy_ctxt_cmd_hdr(ctxt, |
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(struct iwl_phy_context_cmd *)&cmd, |
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action); |
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/* Set the command data */ |
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iwl_mvm_phy_ctxt_cmd_data_v1(mvm, &cmd, chandef, |
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chains_static, |
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chains_dynamic); |
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ret = iwl_mvm_send_cmd_pdu(mvm, PHY_CONTEXT_CMD, |
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0, len, &cmd); |
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} else { |
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IWL_ERR(mvm, "PHY ctxt cmd error ver %d not supported\n", ver); |
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return -EOPNOTSUPP; |
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} |
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if (ret) |
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IWL_ERR(mvm, "PHY ctxt cmd error. ret=%d\n", ret); |
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return ret; |
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} |
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/* |
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* Send a command to add a PHY context based on the current HW configuration. |
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*/ |
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int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, |
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struct cfg80211_chan_def *chandef, |
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u8 chains_static, u8 chains_dynamic) |
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{ |
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WARN_ON(!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && |
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ctxt->ref); |
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lockdep_assert_held(&mvm->mutex); |
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ctxt->channel = chandef->chan; |
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return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, |
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chains_static, chains_dynamic, |
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FW_CTXT_ACTION_ADD); |
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} |
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/* |
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* Update the number of references to the given PHY context. This is valid only |
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* in case the PHY context was already created, i.e., its reference count > 0. |
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*/ |
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void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) |
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{ |
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lockdep_assert_held(&mvm->mutex); |
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ctxt->ref++; |
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} |
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/* |
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* Send a command to modify the PHY context based on the current HW |
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* configuration. Note that the function does not check that the configuration |
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* changed. |
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*/ |
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int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt, |
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struct cfg80211_chan_def *chandef, |
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u8 chains_static, u8 chains_dynamic) |
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{ |
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enum iwl_ctxt_action action = FW_CTXT_ACTION_MODIFY; |
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lockdep_assert_held(&mvm->mutex); |
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if (fw_has_capa(&mvm->fw->ucode_capa, |
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IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT) && |
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ctxt->channel->band != chandef->chan->band) { |
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int ret; |
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/* ... remove it here ...*/ |
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ret = iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, |
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chains_static, chains_dynamic, |
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FW_CTXT_ACTION_REMOVE); |
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if (ret) |
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return ret; |
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/* ... and proceed to add it again */ |
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action = FW_CTXT_ACTION_ADD; |
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} |
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ctxt->channel = chandef->chan; |
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ctxt->width = chandef->width; |
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return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, |
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chains_static, chains_dynamic, |
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action); |
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} |
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void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt) |
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{ |
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lockdep_assert_held(&mvm->mutex); |
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if (WARN_ON_ONCE(!ctxt)) |
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return; |
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ctxt->ref--; |
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/* |
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* Move unused phy's to a default channel. When the phy is moved the, |
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* fw will cleanup immediate quiet bit if it was previously set, |
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* otherwise we might not be able to reuse this phy. |
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*/ |
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if (ctxt->ref == 0) { |
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struct ieee80211_channel *chan; |
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struct cfg80211_chan_def chandef; |
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struct ieee80211_supported_band *sband = NULL; |
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enum nl80211_band band = NL80211_BAND_2GHZ; |
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while (!sband && band < NUM_NL80211_BANDS) |
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sband = mvm->hw->wiphy->bands[band++]; |
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if (WARN_ON(!sband)) |
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return; |
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chan = &sband->channels[0]; |
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cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT); |
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iwl_mvm_phy_ctxt_changed(mvm, ctxt, &chandef, 1, 1); |
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} |
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} |
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static void iwl_mvm_binding_iterator(void *_data, u8 *mac, |
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struct ieee80211_vif *vif) |
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{ |
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unsigned long *data = _data; |
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struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
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if (!mvmvif->phy_ctxt) |
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return; |
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if (vif->type == NL80211_IFTYPE_STATION || |
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vif->type == NL80211_IFTYPE_AP) |
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__set_bit(mvmvif->phy_ctxt->id, data); |
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} |
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int iwl_mvm_phy_ctx_count(struct iwl_mvm *mvm) |
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{ |
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unsigned long phy_ctxt_counter = 0; |
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ieee80211_iterate_active_interfaces_atomic(mvm->hw, |
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IEEE80211_IFACE_ITER_NORMAL, |
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iwl_mvm_binding_iterator, |
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&phy_ctxt_counter); |
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return hweight8(phy_ctxt_counter); |
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}
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