+++ /dev/null
-/******************************************************************************
- *
- * 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 <ilw@linux.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;
- }
-}
-
-/*
- * 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;
- }
-}
-
-/*
- * 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);
-}
-
-/*
- * 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 == IEEE80211_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));
-}
-
-/*
- * 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;
-}
-
-/*
- * 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);
-}
-
-/*
- * 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,
- 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);
-}
-
-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--;
-}
-
-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);
-}
-
-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);
-}
projects / cascardo / linux.git / blobdiff