328 lines
9.8 KiB
C
328 lines
9.8 KiB
C
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/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called COPYING.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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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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#define QUOTA_100 IWL_MVM_MAX_QUOTA
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#define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
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struct iwl_mvm_quota_iterator_data {
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int n_interfaces[MAX_BINDINGS];
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int colors[MAX_BINDINGS];
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int low_latency[MAX_BINDINGS];
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int n_low_latency_bindings;
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struct ieee80211_vif *disabled_vif;
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};
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static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct iwl_mvm_quota_iterator_data *data = _data;
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struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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u16 id;
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/* skip disabled interfaces here immediately */
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if (vif == data->disabled_vif)
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return;
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if (!mvmvif->phy_ctxt)
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return;
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/* currently, PHY ID == binding ID */
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id = mvmvif->phy_ctxt->id;
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/* need at least one binding per PHY */
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BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
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if (WARN_ON_ONCE(id >= MAX_BINDINGS))
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return;
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switch (vif->type) {
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case NL80211_IFTYPE_STATION:
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if (vif->bss_conf.assoc)
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break;
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return;
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_ADHOC:
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if (mvmvif->ap_ibss_active)
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break;
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return;
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case NL80211_IFTYPE_MONITOR:
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if (mvmvif->monitor_active)
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break;
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return;
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case NL80211_IFTYPE_P2P_DEVICE:
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return;
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default:
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WARN_ON_ONCE(1);
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return;
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}
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if (data->colors[id] < 0)
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data->colors[id] = mvmvif->phy_ctxt->color;
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else
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WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
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data->n_interfaces[id]++;
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if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
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data->n_low_latency_bindings++;
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data->low_latency[id] = true;
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}
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}
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static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
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struct iwl_time_quota_cmd *cmd)
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{
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#ifdef CONFIG_NL80211_TESTMODE
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struct iwl_mvm_vif *mvmvif;
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int i, phy_id = -1, beacon_int = 0;
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if (!mvm->noa_duration || !mvm->noa_vif)
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return;
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mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
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if (!mvmvif->ap_ibss_active)
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return;
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phy_id = mvmvif->phy_ctxt->id;
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beacon_int = mvm->noa_vif->bss_conf.beacon_int;
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for (i = 0; i < MAX_BINDINGS; i++) {
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u32 id_n_c = le32_to_cpu(cmd->quotas[i].id_and_color);
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u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
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u32 quota = le32_to_cpu(cmd->quotas[i].quota);
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if (id != phy_id)
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continue;
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quota *= (beacon_int - mvm->noa_duration);
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quota /= beacon_int;
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IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
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le32_to_cpu(cmd->quotas[i].quota), quota);
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cmd->quotas[i].quota = cpu_to_le32(quota);
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}
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#endif
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}
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int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
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struct ieee80211_vif *disabled_vif)
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{
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struct iwl_time_quota_cmd cmd = {};
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int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
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struct iwl_mvm_quota_iterator_data data = {
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.n_interfaces = {},
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.colors = { -1, -1, -1, -1 },
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.disabled_vif = disabled_vif,
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};
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struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
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bool send = false;
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lockdep_assert_held(&mvm->mutex);
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/* update all upon completion */
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if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
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return 0;
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/* iterator data above must match */
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BUILD_BUG_ON(MAX_BINDINGS != 4);
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ieee80211_iterate_active_interfaces_atomic(
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mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
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iwl_mvm_quota_iterator, &data);
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/*
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* The FW's scheduling session consists of
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* IWL_MVM_MAX_QUOTA fragments. Divide these fragments
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* equally between all the bindings that require quota
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*/
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num_active_macs = 0;
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for (i = 0; i < MAX_BINDINGS; i++) {
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cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
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num_active_macs += data.n_interfaces[i];
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}
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n_non_lowlat = num_active_macs;
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if (data.n_low_latency_bindings == 1) {
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for (i = 0; i < MAX_BINDINGS; i++) {
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if (data.low_latency[i]) {
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n_non_lowlat -= data.n_interfaces[i];
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break;
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}
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}
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}
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if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
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/*
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* Reserve quota for the low latency binding in case that
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* there are several data bindings but only a single
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* low latency one. Split the rest of the quota equally
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* between the other data interfaces.
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*/
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quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
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quota_rem = QUOTA_100 - n_non_lowlat * quota -
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QUOTA_LOWLAT_MIN;
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IWL_DEBUG_QUOTA(mvm,
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"quota: low-latency binding active, remaining quota per other binding: %d\n",
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quota);
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} else if (num_active_macs) {
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/*
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* There are 0 or more than 1 low latency bindings, or all the
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* data interfaces belong to the single low latency binding.
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* Split the quota equally between the data interfaces.
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*/
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quota = QUOTA_100 / num_active_macs;
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quota_rem = QUOTA_100 % num_active_macs;
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IWL_DEBUG_QUOTA(mvm,
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"quota: splitting evenly per binding: %d\n",
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quota);
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} else {
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/* values don't really matter - won't be used */
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quota = 0;
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quota_rem = 0;
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}
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for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
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if (data.colors[i] < 0)
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continue;
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cmd.quotas[idx].id_and_color =
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cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
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if (data.n_interfaces[i] <= 0)
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cmd.quotas[idx].quota = cpu_to_le32(0);
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else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
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data.low_latency[i])
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/*
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* There is more than one binding, but only one of the
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* bindings is in low latency. For this case, allocate
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* the minimal required quota for the low latency
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* binding.
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*/
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cmd.quotas[idx].quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
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else
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cmd.quotas[idx].quota =
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cpu_to_le32(quota * data.n_interfaces[i]);
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WARN_ONCE(le32_to_cpu(cmd.quotas[idx].quota) > QUOTA_100,
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"Binding=%d, quota=%u > max=%u\n",
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idx, le32_to_cpu(cmd.quotas[idx].quota), QUOTA_100);
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cmd.quotas[idx].max_duration = cpu_to_le32(0);
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idx++;
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}
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/* Give the remainder of the session to the first data binding */
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for (i = 0; i < MAX_BINDINGS; i++) {
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if (le32_to_cpu(cmd.quotas[i].quota) != 0) {
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le32_add_cpu(&cmd.quotas[i].quota, quota_rem);
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IWL_DEBUG_QUOTA(mvm,
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"quota: giving remainder of %d to binding %d\n",
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quota_rem, i);
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break;
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}
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}
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iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
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/* check that we have non-zero quota for all valid bindings */
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for (i = 0; i < MAX_BINDINGS; i++) {
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if (cmd.quotas[i].id_and_color != last->quotas[i].id_and_color)
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send = true;
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if (cmd.quotas[i].max_duration != last->quotas[i].max_duration)
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send = true;
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if (abs((int)le32_to_cpu(cmd.quotas[i].quota) -
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(int)le32_to_cpu(last->quotas[i].quota))
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> IWL_MVM_QUOTA_THRESHOLD)
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send = true;
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if (cmd.quotas[i].id_and_color == cpu_to_le32(FW_CTXT_INVALID))
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continue;
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WARN_ONCE(cmd.quotas[i].quota == 0,
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"zero quota on binding %d\n", i);
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}
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if (!send) {
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/* don't send a practically unchanged command, the firmware has
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* to re-initialize a lot of state and that can have an adverse
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* impact on it
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*/
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return 0;
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}
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err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, sizeof(cmd), &cmd);
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if (err)
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IWL_ERR(mvm, "Failed to send quota: %d\n", err);
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else
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mvm->last_quota_cmd = cmd;
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return err;
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}
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