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Release 4.11 drivers/net/wireless/intel/iwlwifi/mvm/phy-ctxt.c

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
 * 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 */

u8 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; } }

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/* * Maps the driver specific control channel position (relative to the center * freq) definitions to the the fw values */
u8 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; } }

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/* * 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, u32 action, u32 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); }

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Johannes Berg71100.00%1100.00%
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/* * 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, u8 chains_static, u8 chains_dynamic) { u8 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 CONFIG_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)); }

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Johannes Berg15882.72%333.33%
Emmanuel Grumbach2714.14%444.44%
Moshe Harel31.57%111.11%
Liad Kaufman31.57%111.11%
Total191100.00%9100.00%

/* * 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, u8 chains_static, u8 chains_dynamic, u32 action, u32 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; }

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Johannes Berg10399.04%150.00%
Emmanuel Grumbach10.96%150.00%
Total104100.00%2100.00%

/* * 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, u8 chains_static, u8 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; return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, chains_static, chains_dynamic, FW_CTXT_ACTION_ADD, 0); }

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Johannes Berg7596.15%375.00%
Ilan Peer33.85%125.00%
Total78100.00%4100.00%

/* * 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++; }

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/* * 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, u8 chains_static, u8 chains_dynamic) { lockdep_assert_held(&mvm->mutex); ctxt->channel = chandef->chan; return iwl_mvm_phy_ctxt_apply(mvm, ctxt, chandef, chains_static, chains_dynamic, FW_CTXT_ACTION_MODIFY, 0); }

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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--; }

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Ilan Peer2875.68%150.00%
Johannes Berg924.32%150.00%
Total37100.00%2100.00%


static void iwl_mvm_binding_iterator(void *_data, u8 *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); }

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Arik Nemtsov69100.00%1100.00%
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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); }

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Overall Contributors

PersonTokensPropCommitsCommitProp
Johannes Berg64276.16%635.29%
Arik Nemtsov10512.46%15.88%
Ilan Peer607.12%15.88%
Emmanuel Grumbach293.44%635.29%
Moshe Harel30.36%15.88%
Liad Kaufman30.36%15.88%
Sara Sharon10.12%15.88%
Total843100.00%17100.00%
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