/******************************************************************************
*
* 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 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 - 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 <linux/etherdevice.h>
#include <net/mac80211.h>
#include "iwl-io.h"
#include "iwl-prph.h"
#include "fw-api.h"
#include "mvm.h"
const u8 iwl_mvm_ac_to_tx_fifo[] = {
IWL_MVM_TX_FIFO_VO,
IWL_MVM_TX_FIFO_VI,
IWL_MVM_TX_FIFO_BE,
IWL_MVM_TX_FIFO_BK,
};
struct iwl_mvm_mac_iface_iterator_data {
struct iwl_mvm *mvm;
struct ieee80211_vif *vif;
unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)];
unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)];
unsigned long used_hw_queues[BITS_TO_LONGS(IWL_MVM_MAX_QUEUES)];
enum iwl_tsf_id preferred_tsf;
bool found_vif;
};
static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_mac_iface_iterator_data *data = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u32 ac;
/* Iterator may already find the interface being added -- skip it */
if (vif == data->vif) {
data->found_vif = true;
return;
}
/* Mark the queues used by the vif */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
__set_bit(vif->hw_queue[ac], data->used_hw_queues);
if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
__set_bit(vif->cab_queue, data->used_hw_queues);
/*
* Mark MAC IDs as used by clearing the available bit, and
* (below) mark TSFs as used if their existing use is not
* compatible with the new interface type.
* No locking or atomic bit operations are needed since the
* data is on the stack of the caller function.
*/
__clear_bit(mvmvif->id, data->available_mac_ids);
/*
* The TSF is a hardware/firmware resource, there are 4 and
* the driver should assign and free them as needed. However,
* there are cases where 2 MACs should share the same TSF ID
* for the purpose of clock sync, an optimization to avoid
* clock drift causing overlapping TBTTs/DTIMs for a GO and
* client in the system.
*
* The firmware will decide according to the MAC type which
* will be the master and slave. Clients that need to sync
* with a remote station will be the master, and an AP or GO
* will be the slave.
*
* Depending on the new interface type it can be slaved to
* or become the master of an existing interface.
*/
switch (data->vif->type) {
case NL80211_IFTYPE_STATION:
/*
* The new interface is client, so if the existing one
* we're iterating is an AP, the TSF should be used to
* avoid drift between the new client and existing AP,
* the existing AP will get drift updates from the new
* client context in this case
*/
if (vif->type == NL80211_IFTYPE_AP) {
if (data->preferred_tsf == NUM_TSF_IDS &&
test_bit(mvmvif->tsf_id, data->available_tsf_ids))
data->preferred_tsf = mvmvif->tsf_id;
return;
}
break;
case NL80211_IFTYPE_AP:
/*
* The new interface is AP/GO, so should get drift
* updates from an existing client or use the same
* TSF as an existing GO. There's no drift between
* TSFs internally but if they used different TSFs
* then a new client MAC could update one of them
* and cause drift that way.
*/
if (vif->type == NL80211_IFTYPE_STATION ||
vif->type == NL80211_IFTYPE_AP) {
if (data->preferred_tsf == NUM_TSF_IDS &&
test_bit(mvmvif->tsf_id, data->available_tsf_ids))
data->preferred_tsf = mvmvif->tsf_id;
return;
}
break;
default:
/*
* For all other interface types there's no need to
* take drift into account. Either they're exclusive
* like IBSS and monitor, or we don't care much about
* their TSF (like P2P Device), but we won't be able
* to share the TSF resource.
*/
break;
}
/*
* Unless we exited above, we can't share the TSF resource
* that the virtual interface we're iterating over is using
* with the new one, so clear the available bit and if this
* was the preferred one, reset that as well.
*/
__clear_bit(mvmvif->tsf_id, data->available_tsf_ids);
if (data->preferred_tsf == mvmvif->tsf_id)
data->preferred_tsf = NUM_TSF_IDS;
}
/*
* Get the mask of the queus used by the vif
*/
u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
u32 qmask = 0, ac;
if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
return BIT(IWL_MVM_OFFCHANNEL_QUEUE);
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
qmask |= BIT(vif->hw_queue[ac]);
return qmask;
}
static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_mac_iface_iterator_data data = {
.mvm = mvm,
.vif = vif,
.available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 },
.available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
/* no preference yet */
.preferred_tsf = NUM_TSF_IDS,
.used_hw_queues = {
BIT(IWL_MVM_OFFCHANNEL_QUEUE) |
BIT(mvm->aux_queue) |
BIT(IWL_MVM_CMD_QUEUE)
},
.found_vif = false,
};
u32 ac;
int ret, i;
/*
* Allocate a MAC ID and a TSF for this MAC, along with the queues
* and other resources.
*/
/*
* Before the iterator, we start with all MAC IDs and TSFs available.
*
* During iteration, all MAC IDs are cleared that are in use by other
* virtual interfaces, and all TSF IDs are cleared that can't be used
* by this new virtual interface because they're used by an interface
* that can't share it with the new one.
* At the same time, we check if there's a preferred TSF in the case
* that we should share it with another interface.
*/
/* Currently, MAC ID 0 should be used only for the managed/IBSS vif */
switch (vif->type) {
case NL80211_IFTYPE_ADHOC:
break;
case NL80211_IFTYPE_STATION:
if (!vif->p2p)
break;
/* fall through */
default:
__clear_bit(0, data.available_mac_ids);
}
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
iwl_mvm_mac_iface_iterator, &data);
/*
* In the case we're getting here during resume, it's similar to
* firmware restart, and with RESUME_ALL the iterator will find
* the vif being added already.
* We don't want to reassign any IDs in either case since doing
* so would probably assign different IDs (as interfaces aren't
* necessarily added in the same order), but the old IDs were
* preserved anyway, so skip ID assignment for both resume and
* recovery.
*/
if (data.found_vif)
return 0;
/* Therefore, in recovery, we can't get here */
if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)))
return -EBUSY;
mvmvif->id = find_first_bit(data.available_mac_ids,
NUM_MAC_INDEX_DRIVER);
if (mvmvif->id == NUM_MAC_INDEX_DRIVER) {
IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n");
ret = -EIO;
goto exit_fail;
}
if (data.preferred_tsf != NUM_TSF_IDS)
mvmvif->tsf_id = data.preferred_tsf;
else
mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
NUM_TSF_IDS);
if (mvmvif->tsf_id == NUM_TSF_IDS) {
IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n");
ret = -EIO;
goto exit_fail;
}
mvmvif->color = 0;
INIT_LIST_HEAD(&mvmvif->time_event_data.list);
mvmvif->time_event_data.id = TE_MAX;
/* No need to allocate data queues to P2P Device MAC.*/
if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE;
return 0;
}
/* Find available queues, and allocate them to the ACs */
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
u8 queue = find_first_zero_bit(data.used_hw_queues,
mvm->first_agg_queue);
if (queue >= mvm->first_agg_queue) {
IWL_ERR(mvm, "Failed to allocate queue\n");
ret = -EIO;
goto exit_fail;
}
__set_bit(queue, data.used_hw_queues);
vif->hw_queue[ac] = queue;
}
/* Allocate the CAB queue for softAP and GO interfaces */
if (vif->type == NL80211_IFTYPE_AP) {
u8 queue = find_first_zero_bit(data.used_hw_queues,
mvm->first_agg_queue);
if (queue >= mvm->first_agg_queue) {
IWL_ERR(mvm, "Failed to allocate cab queue\n");
ret = -EIO;
goto exit_fail;
}
vif->cab_queue = queue;
} else {
vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
}
mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT;
mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++)
mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC;
return 0;
exit_fail:
memset(mvmvif, 0, sizeof(struct iwl_mvm_vif));
memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue));
vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
return ret;
}
int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
u32 ac;
int ret;
lockdep_assert_held(&mvm->mutex);
ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif);
if (ret)
return ret;
switch (vif->type) {
case NL80211_IFTYPE_P2P_DEVICE:
iwl_trans_ac_txq_enable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE,
IWL_MVM_TX_FIFO_VO);
break;
case NL80211_IFTYPE_AP:
iwl_trans_ac_txq_enable(mvm->trans, vif->cab_queue,
IWL_MVM_TX_FIFO_MCAST);
/* fall through */
default:
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
iwl_trans_ac_txq_enable(mvm->trans, vif->hw_queue[ac],
iwl_mvm_ac_to_tx_fifo[ac]);
break;
}
return 0;
}
void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
int ac;
lockdep_assert_held(&mvm->mutex);
switch (vif->type) {
case NL80211_IFTYPE_P2P_DEVICE:
iwl_trans_txq_disable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE);
break;
case NL80211_IFTYPE_AP:
iwl_trans_txq_disable(mvm->trans, vif->cab_queue);
/* fall through */
default:
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
iwl_trans_txq_disable(mvm->trans, vif->hw_queue[ac]);
}
}
static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
enum ieee80211_band band,
u8 *cck_rates, u8 *ofdm_rates)
{
struct ieee80211_supported_band *sband;
unsigned long basic = vif->bss_conf.basic_rates;
int lowest_present_ofdm = 100;
int lowest_present_cck = 100;
u8 cck = 0;
u8 ofdm = 0;
int i;
sband = mvm->hw->wiphy->bands[band];
for_each_set_bit(i, &basic, BITS_PER_LONG) {
int hw = sband->bitrates[i].hw_value;
if (hw >= IWL_FIRST_OFDM_RATE) {
ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);
if (lowest_present_ofdm > hw)
lowest_present_ofdm = hw;
} else {
BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
cck |= BIT(hw);
if (lowest_present_cck > hw)
lowest_present_cck = hw;
}
}
/*
* Now we've got the basic rates as bitmaps in the ofdm and cck
* variables. This isn't sufficient though, as there might not
* be all the right rates in the bitmap. E.g. if the only basic
* rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps
* and 6 Mbps because the 802.11-2007 standard says in 9.6:
*
* [...] a STA responding to a received frame shall transmit
* its Control Response frame [...] at the highest rate in the
* BSSBasicRateSet parameter that is less than or equal to the
* rate of the immediately previous frame in the frame exchange
* sequence ([...]) and that is of the same modulation class
* ([...]) as the received frame. If no rate contained in the
* BSSBasicRateSet parameter meets these conditions, then the
* control frame sent in response to a received frame shall be
* transmitted at the highest mandatory rate of the PHY that is
* less than or equal to the rate of the received frame, and
* that is of the same modulation class as the received frame.
*
* As a consequence, we need to add all mandatory rates that are
* lower than all of the basic rates to these bitmaps.
*/
if (IWL_RATE_24M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE;
if (IWL_RATE_12M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE;
/* 6M already there or needed so always add */
ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE;
/*
* CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.
* Note, however:
* - if no CCK rates are basic, it must be ERP since there must
* be some basic rates at all, so they're OFDM => ERP PHY
* (or we're in 5 GHz, and the cck bitmap will never be used)
* - if 11M is a basic rate, it must be ERP as well, so add 5.5M
* - if 5.5M is basic, 1M and 2M are mandatory
* - if 2M is basic, 1M is mandatory
* - if 1M is basic, that's the only valid ACK rate.
* As a consequence, it's not as complicated as it sounds, just add
* any lower rates to the ACK rate bitmap.
*/
if (IWL_RATE_11M_INDEX < lowest_present_cck)
cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_5M_INDEX < lowest_present_cck)
cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_2M_INDEX < lowest_present_cck)
cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE;
/* 1M already there or needed so always add */
cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE;
*cck_rates = cck;
*ofdm_rates = ofdm;
}
static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mac_ctx_cmd *cmd)
{
/* for both sta and ap, ht_operation_mode hold the protection_mode */
u8 protection_mode = vif->bss_conf.ht_operation_mode &
IEEE80211_HT_OP_MODE_PROTECTION;
/* The fw does not distinguish between ht and fat */
u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT;
IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode);
/*
* See section 9.23.3.1 of IEEE 80211-2012.
* Nongreenfield HT STAs Present is not supported.
*/
switch (protection_mode) {
case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
break;
case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
cmd->protection_flags |= cpu_to_le32(ht_flag);
break;
case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
/* Protect when channel wider than 20MHz */
if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20)
cmd->protection_flags |= cpu_to_le32(ht_flag);
break;
default:
IWL_ERR(mvm, "Illegal protection mode %d\n",
protection_mode);
break;
}
}
static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mac_ctx_cmd *cmd,
u32 action)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct ieee80211_chanctx_conf *chanctx;
bool ht_enabled = !!(vif->bss_conf.ht_operation_mode &
IEEE80211_HT_OP_MODE_PROTECTION);
u8 cck_ack_rates, ofdm_ack_rates;
int i;
cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
mvmvif->color));
cmd->action = cpu_to_le32(action);
switch (vif->type) {
case NL80211_IFTYPE_STATION:
if (vif->p2p)
cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA);
else
cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA);
break;
case NL80211_IFTYPE_AP:
cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO);
break;
case NL80211_IFTYPE_MONITOR:
cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER);
break;
case NL80211_IFTYPE_P2P_DEVICE:
cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE);
break;
case NL80211_IFTYPE_ADHOC:
cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS);
break;
default:
WARN_ON_ONCE(1);
}
cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id);
memcpy(cmd->node_addr, vif->addr, ETH_ALEN);
if (vif->bss_conf.bssid)
memcpy(cmd->bssid_addr, vif->bss_conf.bssid, ETH_ALEN);
else
eth_broadcast_addr(cmd->bssid_addr);
rcu_read_lock();
chanctx = rcu_dereference(vif->chanctx_conf);
iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band
: IEEE80211_BAND_2GHZ,
&cck_ack_rates, &ofdm_ack_rates);
rcu_read_unlock();
cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates);
cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates);
cmd->cck_short_preamble =
cpu_to_le32(vif->bss_conf.use_short_preamble ?
MAC_FLG_SHORT_PREAMBLE : 0);
cmd->short_slot =
cpu_to_le32(vif->bss_conf.use_short_slot ?
MAC_FLG_SHORT_SLOT : 0);
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
u8 txf = iwl_mvm_ac_to_tx_fifo[i];
cmd->ac[txf].cw_min =
cpu_to_le16(mvmvif->queue_params[i].cw_min);
cmd->ac[txf].cw_max =
cpu_to_le16(mvmvif->queue_params[i].cw_max);
cmd->ac[txf].edca_txop =
cpu_to_le16(mvmvif->queue_params[i].txop * 32);
cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs;
cmd->ac[txf].fifos_mask = BIT(txf);
}
/* in AP mode, the MCAST FIFO takes the EDCA params from VO */
if (vif->type == NL80211_IFTYPE_AP)
cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |=
BIT(IWL_MVM_TX_FIFO_MCAST);
if (vif->bss_conf.qos)
cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
/* Don't use cts to self as the fw doesn't support it currently. */
if (vif->bss_conf.use_cts_prot) {
cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 8)
cmd->protection_flags |=
cpu_to_le32(MAC_PROT_FLG_SELF_CTS_EN);
}
IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n",
vif->bss_conf.use_cts_prot,
vif->bss_conf.ht_operation_mode);
if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN);
if (ht_enabled)
iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd);
cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
}
static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm,
struct iwl_mac_ctx_cmd *cmd)
{
int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, CMD_SYNC,
sizeof(*cmd), cmd);
if (ret)
IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n",
le32_to_cpu(cmd->action), ret);
return ret;
}
/*
* Fill the specific data for mac context of type station or p2p client
*/
static void iwl_mvm_mac_ctxt_cmd_fill_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mac_data_sta *ctxt_sta,
bool force_assoc_off)
{
/* We need the dtim_period to set the MAC as associated */
if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
!force_assoc_off) {
u32 dtim_offs;
/*
* The DTIM count counts down, so when it is N that means N
* more beacon intervals happen until the DTIM TBTT. Therefore
* add this to the current time. If that ends up being in the
* future, the firmware will handle it.
*
* Also note that the system_timestamp (which we get here as
* "sync_device_ts") and TSF timestamp aren't at exactly the
* same offset in the frame -- the TSF is at the first symbol
* of the TSF, the system timestamp is at signal acquisition
* time. This means there's an offset between them of at most
* a few hundred microseconds (24 * 8 bits + PLCP time gives
* 384us in the longest case), this is currently not relevant
* as the firmware wakes up around 2ms before the TBTT.
*/
dtim_offs = vif->bss_conf.sync_dtim_count *
vif->bss_conf.beacon_int;
/* convert TU to usecs */
dtim_offs *= 1024;
ctxt_sta->dtim_tsf =
cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs);
ctxt_sta->dtim_time =
cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs);
IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n",
le64_to_cpu(ctxt_sta->dtim_tsf),
le32_to_cpu(ctxt_sta->dtim_time),
dtim_offs);
ctxt_sta->is_assoc = cpu_to_le32(1);
} else {
ctxt_sta->is_assoc = cpu_to_le32(0);
}
ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
ctxt_sta->bi_reciprocal =
cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
vif->bss_conf.dtim_period);
ctxt_sta->dtim_reciprocal =
cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
vif->bss_conf.dtim_period));
ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval);
ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid);
}
static int iwl_mvm_mac_ctxt_cmd_station(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action)
{
struct iwl_mac_ctx_cmd cmd = {};
WARN_ON(vif->type != NL80211_IFTYPE_STATION || vif->p2p);
/* Fill the common data for all mac context types */
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
/* Allow beacons to pass through as long as we are not associated,or we
* do not have dtim period information */
if (!vif->bss_conf.assoc || !vif->bss_conf.dtim_period)
cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
else
cmd.filter_flags &= ~cpu_to_le32(MAC_FILTER_IN_BEACON);
/* Fill the data specific for station mode */
iwl_mvm_mac_ctxt_cmd_fill_sta(mvm, vif, &cmd.sta,
action == FW_CTXT_ACTION_ADD);
return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
}
static int iwl_mvm_mac_ctxt_cmd_p2p_client(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action)
{
struct iwl_mac_ctx_cmd cmd = {};
struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
WARN_ON(vif->type != NL80211_IFTYPE_STATION || !vif->p2p);
/* Fill the common data for all mac context types */
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
/* Fill the data specific for station mode */
iwl_mvm_mac_ctxt_cmd_fill_sta(mvm, vif, &cmd.p2p_sta.sta,
action == FW_CTXT_ACTION_ADD);
cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
}
static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action)
{
struct iwl_mac_ctx_cmd cmd = {};
WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC |
MAC_FILTER_IN_CONTROL_AND_MGMT |
MAC_FILTER_IN_BEACON |
MAC_FILTER_IN_PROBE_REQUEST |
MAC_FILTER_IN_CRC32);
mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
}
static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mac_ctx_cmd cmd = {};
WARN_ON(vif->type != NL80211_IFTYPE_ADHOC);
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
MAC_FILTER_IN_PROBE_REQUEST);
/* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int);
cmd.ibss.bi_reciprocal =
cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
/* TODO: Assumes that the beacon id == mac context id */
cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id);
return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
}
struct iwl_mvm_go_iterator_data {
bool go_active;
};
static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif)
{
struct iwl_mvm_go_iterator_data *data = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
mvmvif->ap_ibss_active)
data->go_active = true;
}
static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action)
{
struct iwl_mac_ctx_cmd cmd = {};
struct iwl_mvm_go_iterator_data data = {};
WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE);
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
/* Override the filter flags to accept only probe requests */
cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
/*
* This flag should be set to true when the P2P Device is
* discoverable and there is at least another active P2P GO. Settings
* this flag will allow the P2P Device to be discoverable on other
* channels in addition to its listen channel.
* Note that this flag should not be set in other cases as it opens the
* Rx filters on all MAC and increases the number of interrupts.
*/
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
iwl_mvm_go_iterator, &data);
cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0);
return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
}
static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
struct iwl_mac_beacon_cmd *beacon_cmd,
u8 *beacon, u32 frame_size)
{
u32 tim_idx;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
/* The index is relative to frame start but we start looking at the
* variable-length part of the beacon. */
tim_idx = mgmt->u.beacon.variable - beacon;
/* Parse variable-length elements of beacon to find WLAN_EID_TIM */
while ((tim_idx < (frame_size - 2)) &&
(beacon[tim_idx] != WLAN_EID_TIM))
tim_idx += beacon[tim_idx+1] + 2;
/* If TIM field was found, set variables */
if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
beacon_cmd->tim_idx = cpu_to_le32(tim_idx);
beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]);
} else {
IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
}
}
static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct sk_buff *beacon)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_host_cmd cmd = {
.id = BEACON_TEMPLATE_CMD,
.flags = CMD_ASYNC,
};
struct iwl_mac_beacon_cmd beacon_cmd = {};
struct ieee80211_tx_info *info;
u32 beacon_skb_len;
u32 rate;
if (WARN_ON(!beacon))
return -EINVAL;
beacon_skb_len = beacon->len;
/* TODO: for now the beacon template id is set to be the mac context id.
* Might be better to handle it as another resource ... */
beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
/* Set up TX command fields */
beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len);
beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id;
beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
beacon_cmd.tx.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
TX_CMD_FLG_BT_DIS |
TX_CMD_FLG_TSF);
mvm->mgmt_last_antenna_idx =
iwl_mvm_next_antenna(mvm, iwl_fw_valid_tx_ant(mvm->fw),
mvm->mgmt_last_antenna_idx);
beacon_cmd.tx.rate_n_flags =
cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
RATE_MCS_ANT_POS);
info = IEEE80211_SKB_CB(beacon);
if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) {
rate = IWL_FIRST_OFDM_RATE;
} else {
rate = IWL_FIRST_CCK_RATE;
beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
}
beacon_cmd.tx.rate_n_flags |=
cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
/* Set up TX beacon command fields */
if (vif->type == NL80211_IFTYPE_AP)
iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd,
beacon->data,
beacon_skb_len);
/* Submit command */
cmd.len[0] = sizeof(beacon_cmd);
cmd.data[0] = &beacon_cmd;
cmd.dataflags[0] = 0;
cmd.len[1] = beacon_skb_len;
cmd.data[1] = beacon->data;
cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
return iwl_mvm_send_cmd(mvm, &cmd);
}
/* The beacon template for the AP/GO/IBSS has changed and needs update */
int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
struct sk_buff *beacon;
int ret;
WARN_ON(vif->type != NL80211_IFTYPE_AP &&
vif->type != NL80211_IFTYPE_ADHOC);
beacon = ieee80211_beacon_get(mvm->hw, vif);
if (!beacon)
return -ENOMEM;
ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon);
dev_kfree_skb(beacon);
return ret;
}
struct iwl_mvm_mac_ap_iterator_data {
struct iwl_mvm *mvm;
struct ieee80211_vif *vif;
u32 beacon_device_ts;
u16 beacon_int;
};
/* Find the beacon_device_ts and beacon_int for a managed interface */
static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_mac_ap_iterator_data *data = _data;
if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc)
return;
/* Station client has higher priority over P2P client*/
if (vif->p2p && data->beacon_device_ts)
return;
data->beacon_device_ts = vif->bss_conf.sync_device_ts;
data->beacon_int = vif->bss_conf.beacon_int;
}
/*
* Fill the specific data for mac context of type AP of P2P GO
*/
static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_mac_data_ap *ctxt_ap,
bool add)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm_mac_ap_iterator_data data = {
.mvm = mvm,
.vif = vif,
.beacon_device_ts = 0
};
ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
ctxt_ap->bi_reciprocal =
cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int));
ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
vif->bss_conf.dtim_period);
ctxt_ap->dtim_reciprocal =
cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int *
vif->bss_conf.dtim_period));
ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue);
/*
* Only set the beacon time when the MAC is being added, when we
* just modify the MAC then we should keep the time -- the firmware
* can otherwise have a "jumping" TBTT.
*/
if (add) {
/*
* If there is a station/P2P client interface which is
* associated, set the AP's TBTT far enough from the station's
* TBTT. Otherwise, set it to the current system time
*/
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
iwl_mvm_mac_ap_iterator, &data);
if (data.beacon_device_ts) {
u32 rand = (prandom_u32() % (80 - 20)) + 20;
mvmvif->ap_beacon_time = data.beacon_device_ts +
ieee80211_tu_to_usec(data.beacon_int * rand /
100);
} else {
mvmvif->ap_beacon_time =
iwl_read_prph(mvm->trans,
DEVICE_SYSTEM_TIME_REG);
}
}
ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time);
ctxt_ap->beacon_tsf = 0; /* unused */
/* TODO: Assume that the beacon id == mac context id */
ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id);
}
static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action)
{
struct iwl_mac_ctx_cmd cmd = {};
WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p);
/* Fill the common data for all mac context types */
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
/* Also enable probe requests to pass */
cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
/* Fill the data specific for ap mode */
iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap,
action == FW_CTXT_ACTION_ADD);
return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
}
static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action)
{
struct iwl_mac_ctx_cmd cmd = {};
struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr;
WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p);
/* Fill the common data for all mac context types */
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action);
/* Fill the data specific for GO mode */
iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap,
action == FW_CTXT_ACTION_ADD);
cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow &
IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
cmd.go.opp_ps_enabled =
cpu_to_le32(!!(noa->oppps_ctwindow &
IEEE80211_P2P_OPPPS_ENABLE_BIT));
return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd);
}
static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
u32 action)
{
switch (vif->type) {
case NL80211_IFTYPE_STATION:
if (!vif->p2p)
return iwl_mvm_mac_ctxt_cmd_station(mvm, vif,
action);
else
return iwl_mvm_mac_ctxt_cmd_p2p_client(mvm, vif,
action);
break;
case NL80211_IFTYPE_AP:
if (!vif->p2p)
return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action);
else
return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action);
break;
case NL80211_IFTYPE_MONITOR:
return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action);
case NL80211_IFTYPE_P2P_DEVICE:
return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action);
case NL80211_IFTYPE_ADHOC:
return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action);
default:
break;
}
return -EOPNOTSUPP;
}
int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
int ret;
if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n",
vif->addr, ieee80211_vif_type_p2p(vif)))
return -EIO;
ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD);
if (ret)
return ret;
/* will only do anything at resume from D3 time */
iwl_mvm_set_last_nonqos_seq(mvm, vif);
mvmvif->uploaded = true;
return 0;
}
int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n",
vif->addr, ieee80211_vif_type_p2p(vif)))
return -EIO;
return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY);
}
int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mac_ctx_cmd cmd;
int ret;
if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n",
vif->addr, ieee80211_vif_type_p2p(vif)))
return -EIO;
memset(&cmd, 0, sizeof(cmd));
cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
mvmvif->color));
cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE);
ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, CMD_SYNC,
sizeof(cmd), &cmd);
if (ret) {
IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret);
return ret;
}
mvmvif->uploaded = false;
if (vif->type == NL80211_IFTYPE_MONITOR)
mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
return 0;
}
int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_beacon_notif *beacon = (void *)pkt->data;
u16 status __maybe_unused =
le16_to_cpu(beacon->beacon_notify_hdr.status.status);
u32 rate __maybe_unused =
le32_to_cpu(beacon->beacon_notify_hdr.initial_rate);
IWL_DEBUG_RX(mvm, "beacon status %#x retries:%d tsf:0x%16llX rate:%d\n",
status & TX_STATUS_MSK,
beacon->beacon_notify_hdr.failure_frame,
le64_to_cpu(beacon->tsf),
rate);
return 0;
}
static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
u16 *id = _data;
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (mvmvif->id == *id)
ieee80211_beacon_loss(vif);
}
int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_missed_beacons_notif *missed_beacons = (void *)pkt->data;
u16 id = (u16)le32_to_cpu(missed_beacons->mac_id);
ieee80211_iterate_active_interfaces_atomic(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_beacon_loss_iterator,
&id);
return 0;
}
