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/******************************************************************************
*
* 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;
}
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