292 lines
9.3 KiB
C
292 lines
9.3 KiB
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 <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 the fw values */
|
||
|
|
static inline 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
|
||
|
|
*/
|
||
|
|
static inline 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(mvm->fw->valid_rx_ant <<
|
||
|
|
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);
|
||
|
|
|
||
|
|
cmd->txchain_info = cpu_to_le32(mvm->fw->valid_tx_ant);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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);
|
||
|
|
}
|