drivers/net/wireless/iwlwifi/mvm/quota.c - linux - Git at Google

 /******************************************************************************
  *
  * 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 - 2013 Intel Corporation. All rights reserved.
  *
  * 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 LICENSE.GPL.
  *
  * 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 - 2013 Intel Corporation. All rights reserved.
  * 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"

 struct iwl_mvm_quota_iterator_data {
 	int n_interfaces[MAX_BINDINGS];
 	int colors[MAX_BINDINGS];
 	struct ieee80211_vif *new_vif;
 };

 static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
 				   struct ieee80211_vif *vif)
 {
 	struct iwl_mvm_quota_iterator_data *data = _data;
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	u16 id;

 	/*
 	 * We'll account for the new interface (if any) below,
 	 * skip it here in case we're not called from within
 	 * the add_interface callback (otherwise it won't show
 	 * up in iteration)
 	 */
 	if (vif == data->new_vif)
 		return;

 	if (!mvmvif->phy_ctxt)
 		return;

 	/* currently, PHY ID == binding ID */
 	id = mvmvif->phy_ctxt->id;

 	/* need at least one binding per PHY */
 	BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);

 	if (WARN_ON_ONCE(id >= MAX_BINDINGS))
 		return;

 	if (data->colors[id] < 0)
 		data->colors[id] = mvmvif->phy_ctxt->color;
 	else
 		WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);

 	switch (vif->type) {
 	case NL80211_IFTYPE_STATION:
 		if (vif->bss_conf.assoc)
 			data->n_interfaces[id]++;
 		break;
 	case NL80211_IFTYPE_AP:
 		if (mvmvif->ap_active)
 			data->n_interfaces[id]++;
 		break;
 	case NL80211_IFTYPE_MONITOR:
 		data->n_interfaces[id]++;
 		break;
 	case NL80211_IFTYPE_P2P_DEVICE:
 		break;
 	case NL80211_IFTYPE_ADHOC:
 		if (vif->bss_conf.ibss_joined)
 			data->n_interfaces[id]++;
 		break;
 	default:
 		WARN_ON_ONCE(1);
 		break;
 	}
 }

 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif)
 {
 	struct iwl_time_quota_cmd cmd;
 	int i, idx, ret, num_active_bindings, quota, quota_rem;
 	struct iwl_mvm_quota_iterator_data data = {
 		.n_interfaces = {},
 		.colors = { -1, -1, -1, -1 },
 		.new_vif = newvif,
 	};

 	/* update all upon completion */
 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 		return 0;

 	BUILD_BUG_ON(data.colors[MAX_BINDINGS - 1] != -1);

 	lockdep_assert_held(&mvm->mutex);

 	memset(&cmd, 0, sizeof(cmd));

 	ieee80211_iterate_active_interfaces_atomic(
 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 		iwl_mvm_quota_iterator, &data);
 	if (newvif) {
 		data.new_vif = NULL;
 		iwl_mvm_quota_iterator(&data, newvif->addr, newvif);
 	}

 	/*
 	 * The FW's scheduling session consists of
 	 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
 	 * equally between all the bindings that require quota
 	 */
 	num_active_bindings = 0;
 	for (i = 0; i < MAX_BINDINGS; i++) {
 		cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 		if (data.n_interfaces[i] > 0)
 			num_active_bindings++;
 	}

 	if (!num_active_bindings)
 		goto send_cmd;

 	quota = IWL_MVM_MAX_QUOTA / num_active_bindings;
 	quota_rem = IWL_MVM_MAX_QUOTA % num_active_bindings;

 	for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
 		if (data.n_interfaces[i] <= 0)
 			continue;

 		cmd.quotas[idx].id_and_color =
 			cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
 		cmd.quotas[idx].quota = cpu_to_le32(quota);
 		cmd.quotas[idx].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 		idx++;
 	}

 	/* Give the remainder of the session to the first binding */
 	le32_add_cpu(&cmd.quotas[0].quota, quota_rem);

 send_cmd:
 	ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 				   sizeof(cmd), &cmd);
 	if (ret)
 		IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 	return ret;
 }
	/******************************************************************************
	*
	* 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 - 2013 Intel Corporation. All rights reserved.
	*
	* 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 LICENSE.GPL.
	*
	* 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 - 2013 Intel Corporation. All rights reserved.
	* 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"

	struct iwl_mvm_quota_iterator_data {
	int n_interfaces[MAX_BINDINGS];
	int colors[MAX_BINDINGS];
	struct ieee80211_vif *new_vif;
	};

	static void iwl_mvm_quota_iterator(void _data, u8 mac,
	struct ieee80211_vif *vif)
	{
	struct iwl_mvm_quota_iterator_data *data = _data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	u16 id;

	/*
	* We'll account for the new interface (if any) below,
	* skip it here in case we're not called from within
	* the add_interface callback (otherwise it won't show
	* up in iteration)
	*/
	if (vif == data->new_vif)
	return;

	if (!mvmvif->phy_ctxt)
	return;

	/* currently, PHY ID == binding ID */
	id = mvmvif->phy_ctxt->id;

	/* need at least one binding per PHY */
	BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);

	if (WARN_ON_ONCE(id >= MAX_BINDINGS))
	return;

	if (data->colors[id] < 0)
	data->colors[id] = mvmvif->phy_ctxt->color;
	else
	WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);

	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
	if (vif->bss_conf.assoc)
	data->n_interfaces[id]++;
	break;
	case NL80211_IFTYPE_AP:
	if (mvmvif->ap_active)
	data->n_interfaces[id]++;
	break;
	case NL80211_IFTYPE_MONITOR:
	data->n_interfaces[id]++;
	break;
	case NL80211_IFTYPE_P2P_DEVICE:
	break;
	case NL80211_IFTYPE_ADHOC:
	if (vif->bss_conf.ibss_joined)
	data->n_interfaces[id]++;
	break;
	default:
	WARN_ON_ONCE(1);
	break;
	}
	}

	int iwl_mvm_update_quotas(struct iwl_mvm mvm, struct ieee80211_vif newvif)
	{
	struct iwl_time_quota_cmd cmd;
	int i, idx, ret, num_active_bindings, quota, quota_rem;
	struct iwl_mvm_quota_iterator_data data = {
	.n_interfaces = {},
	.colors = { -1, -1, -1, -1 },
	.new_vif = newvif,
	};

	/* update all upon completion */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
	return 0;

	BUILD_BUG_ON(data.colors[MAX_BINDINGS - 1] != -1);

	lockdep_assert_held(&mvm->mutex);

	memset(&cmd, 0, sizeof(cmd));

	ieee80211_iterate_active_interfaces_atomic(
	mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
	iwl_mvm_quota_iterator, &data);
	if (newvif) {
	data.new_vif = NULL;
	iwl_mvm_quota_iterator(&data, newvif->addr, newvif);
	}

	/*
	* The FW's scheduling session consists of
	* IWL_MVM_MAX_QUOTA fragments. Divide these fragments
	* equally between all the bindings that require quota
	*/
	num_active_bindings = 0;
	for (i = 0; i < MAX_BINDINGS; i++) {
	cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
	if (data.n_interfaces[i] > 0)
	num_active_bindings++;
	}

	if (!num_active_bindings)
	goto send_cmd;

	quota = IWL_MVM_MAX_QUOTA / num_active_bindings;
	quota_rem = IWL_MVM_MAX_QUOTA % num_active_bindings;

	for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
	if (data.n_interfaces[i] <= 0)
	continue;

	cmd.quotas[idx].id_and_color =
	cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
	cmd.quotas[idx].quota = cpu_to_le32(quota);
	cmd.quotas[idx].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
	idx++;
	}

	/* Give the remainder of the session to the first binding */
	le32_add_cpu(&cmd.quotas[0].quota, quota_rem);

	send_cmd:
	ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
	sizeof(cmd), &cmd);
	if (ret)
	IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
	return ret;
	}