// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2012-2014, 2018-2021 Intel Corporation
* Copyright (C) 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2015-2017 Intel Deutschland GmbH
*/
#include <linux/etherdevice.h>
#include <linux/crc32.h>
#include <net/mac80211.h>
#include "iwl-io.h"
#include "iwl-prph.h"
#include "fw-api.h"
#include "mvm.h"
#include "time-event.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,
};
const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = {
IWL_GEN2_EDCA_TX_FIFO_VO,
IWL_GEN2_EDCA_TX_FIFO_VI,
IWL_GEN2_EDCA_TX_FIFO_BE,
IWL_GEN2_EDCA_TX_FIFO_BK,
IWL_GEN2_TRIG_TX_FIFO_VO,
IWL_GEN2_TRIG_TX_FIFO_VI,
IWL_GEN2_TRIG_TX_FIFO_BE,
IWL_GEN2_TRIG_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)];
enum iwl_tsf_id preferred_tsf;
bool found_vif;
};
static void iwl_mvm_mac_tsf_id_iter(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);
u16 min_bi;
/* Skip the interface for which we are trying to assign a tsf_id */
if (vif == data->vif)
return;
/*
* 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 leader and follower. Clients that need to sync
* with a remote station will be the leader, and an AP or GO
* will be the follower.
*
* Depending on the new interface type it can be following
* or become the leader of an existing interface.
*/
switch (data->vif->type) {
case NL80211_IFTYPE_STATION:
/*
* The new interface is a client, so if the one we're iterating
* is an AP, and the beacon interval of the AP is a multiple or
* divisor of the beacon interval of the client, the same 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 ||
data->preferred_tsf != NUM_TSF_IDS ||
!test_bit(mvmvif->tsf_id, data->available_tsf_ids))
break;
min_bi = min(data->vif->bss_conf.beacon_int,
vif->bss_conf.beacon_int);
if (!min_bi)
break;
if ((data->vif->bss_conf.beacon_int -
vif->bss_conf.beacon_int) % min_bi == 0) {
data->preferred_tsf = mvmvif->tsf_id;
return;
}
break;
case NL80211_IFTYPE_AP:
/*
* The new interface is AP/GO, so if its beacon interval is a
* multiple or a divisor of the beacon interval of an existing
* interface, it 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_AP &&
vif->type != NL80211_IFTYPE_STATION) ||
data->preferred_tsf != NUM_TSF_IDS ||
!test_bit(mvmvif->tsf_id, data->available_tsf_ids))
break;
min_bi = min(data->vif->bss_conf.beacon_int,
vif->bss_conf.beacon_int);
if (!min_bi)
break;
if ((data->vif->bss_conf.beacon_int -
vif->bss_conf.beacon_int) % min_bi == 0) {
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;
}
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);
/* Iterator may already find the interface being added -- skip it */
if (vif == data->vif) {
data->found_vif = true;
return;
}
/* 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);
/* find a suitable tsf_id */
iwl_mvm_mac_tsf_id_iter(_data, mac, vif);
}
void iwl_mvm_mac_ctxt_recalc_tsf_id(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_tsf_ids = { (1 << NUM_TSF_IDS) - 1 },
/* no preference yet */
.preferred_tsf = NUM_TSF_IDS,
};
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
iwl_mvm_mac_tsf_id_iter, &data);
if (data.preferred_tsf != NUM_TSF_IDS)
mvmvif->tsf_id = data.preferred_tsf;
else if (!test_bit(mvmvif->tsf_id, data.available_tsf_ids))
mvmvif->tsf_id = find_first_bit(data.available_tsf_ids,
NUM_TSF_IDS);
}
int iwl_mvm_mac_ctxt_init(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,
.found_vif = false,
};
int ret, i;
lockdep_assert_held(&mvm->mutex);
/*
* 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;
fallthrough;
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 and NAN.*/
if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
return 0;
/* Allocate the CAB queue for softAP and GO interfaces */
if (vif->type == NL80211_IFTYPE_AP ||
vif->type == NL80211_IFTYPE_ADHOC) {
/*
* For TVQM this will be overwritten later with the FW assigned
* queue value (when queue is enabled).
*/
mvmvif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE;
}
mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA;
mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA;
mvmvif->ap_sta_id = IWL_MVM_INVALID_STA;
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));
return ret;
}
static void iwl_mvm_ack_rates(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
enum nl80211_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,
const u8 *bssid_override,
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;
const u8 *bssid = bssid_override ?: vif->bss_conf.bssid;
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 (bssid)
memcpy(cmd->bssid_addr, 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
: NL80211_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);
cmd->filter_flags = 0;
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
u8 txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, i);
u8 ucode_ac = iwl_mvm_mac80211_ac_to_ucode_ac(i);
cmd->ac[ucode_ac].cw_min =
cpu_to_le16(mvmvif->queue_params[i].cw_min);
cmd->ac[ucode_ac].cw_max =
cpu_to_le16(mvmvif->queue_params[i].cw_max);
cmd->ac[ucode_ac].edca_txop =
cpu_to_le16(mvmvif->queue_params[i].txop * 32);
cmd->ac[ucode_ac].aifsn = mvmvif->queue_params[i].aifs;
cmd->ac[ucode_ac].fifos_mask = BIT(txf);
}
if (vif->bss_conf.qos)
cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA);
if (vif->bss_conf.use_cts_prot)
cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT);
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);
}
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, 0,
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;
}
static int iwl_mvm_mac_ctxt_cmd_sta(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
u32 action, bool force_assoc_off,
const u8 *bssid_override)
{
struct iwl_mac_ctx_cmd cmd = {};
struct iwl_mac_data_sta *ctxt_sta;
WARN_ON(vif->type != NL80211_IFTYPE_STATION);
/* Fill the common data for all mac context types */
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, bssid_override, action);
if (vif->p2p) {
struct ieee80211_p2p_noa_attr *noa =
&vif->bss_conf.p2p_noa_attr;
cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow &
IEEE80211_P2P_OPPPS_CTWINDOW_MASK);
ctxt_sta = &cmd.p2p_sta.sta;
} else {
ctxt_sta = &cmd.sta;
}
/* We need the dtim_period to set the MAC as associated */
if (vif->bss_conf.assoc && vif->bss_conf.dtim_period &&
!force_assoc_off) {
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u8 ap_sta_id = mvmvif->ap_sta_id;
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);
ctxt_sta->assoc_beacon_arrive_time =
cpu_to_le32(vif->bss_conf.sync_device_ts);
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);
/*
* allow multicast data frames only as long as the station is
* authorized, i.e., GTK keys are already installed (if needed)
*/
if (ap_sta_id < mvm->fw->ucode_capa.num_stations) {
struct ieee80211_sta *sta;
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[ap_sta_id]);
if (!IS_ERR_OR_NULL(sta)) {
struct iwl_mvm_sta *mvmsta =
iwl_mvm_sta_from_mac80211(sta);
if (mvmsta->sta_state ==
IEEE80211_STA_AUTHORIZED)
cmd.filter_flags |=
cpu_to_le32(MAC_FILTER_ACCEPT_GRP);
}
rcu_read_unlock();
}
} else {
ctxt_sta->is_assoc = cpu_to_le32(0);
/* Allow beacons to pass through as long as we are not
* associated, or we do not have dtim period information.
*/
cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
}
ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int);
ctxt_sta->dtim_interval = cpu_to_le32(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);
if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p)
cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
if (vif->bss_conf.he_support && !iwlwifi_mod_params.disable_11ax) {
cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_11AX);
if (vif->bss_conf.twt_requester && IWL_MVM_USE_TWT)
ctxt_sta->data_policy |= cpu_to_le32(TWT_SUPPORTED);
if (vif->bss_conf.twt_protected)
ctxt_sta->data_policy |=
cpu_to_le32(PROTECTED_TWT_SUPPORTED);
if (vif->bss_conf.twt_broadcast)
ctxt_sta->data_policy |=
cpu_to_le32(BROADCAST_TWT_SUPPORTED);
}
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 = {};
u32 tfd_queue_msk = BIT(mvm->snif_queue);
int ret;
WARN_ON(vif->type != NL80211_IFTYPE_MONITOR);
iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, 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 |
MAC_FILTER_ACCEPT_GRP);
ieee80211_hw_set(mvm->hw, RX_INCLUDES_FCS);
/* Allocate sniffer station */
ret = iwl_mvm_allocate_int_sta(mvm, &mvm->snif_sta, tfd_queue_msk,
vif->type, IWL_STA_GENERAL_PURPOSE);
if (ret)
return ret;
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, NULL, action);
cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON |
MAC_FILTER_IN_PROBE_REQUEST |
MAC_FILTER_ACCEPT_GRP);
/* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */
cmd.ibss.bi = cpu_to_le32(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, NULL, action);
/* 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);
}
void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm,
__le32 *tim_index, __le32 *tim_size,
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)) {
*tim_index = cpu_to_le32(tim_idx);
*tim_size = cpu_to_le32((u32)beacon[tim_idx + 1]);
} else {
IWL_WARN(mvm, "Unable to find TIM Element in beacon\n");
}
}
static u32 iwl_mvm_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
{
struct ieee80211_mgmt *mgmt = (void *)beacon;
const u8 *ie;
if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
return 0;
frame_size -= mgmt->u.beacon.variable - beacon;
ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
if (!ie)
return 0;
return ie - beacon;
}
u8 iwl_mvm_mac_ctxt_get_lowest_rate(struct ieee80211_tx_info *info,
struct ieee80211_vif *vif)
{
u8 rate;
if (info->band == NL80211_BAND_2GHZ && !vif->p2p)
rate = IWL_FIRST_CCK_RATE;
else
rate = IWL_FIRST_OFDM_RATE;
return rate;
}
static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct sk_buff *beacon,
struct iwl_tx_cmd *tx)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct ieee80211_tx_info *info;
u8 rate;
u32 tx_flags;
info = IEEE80211_SKB_CB(beacon);
/* Set up TX command fields */
tx->len = cpu_to_le16((u16)beacon->len);
tx->sta_id = mvmvif->bcast_sta.sta_id;
tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF;
tx_flags |=
iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) <<
TX_CMD_FLG_BT_PRIO_POS;
tx->tx_flags = cpu_to_le32(tx_flags);
if (!fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION))
iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
tx->rate_n_flags =
cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) <<
RATE_MCS_ANT_POS);
rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
if (rate == IWL_FIRST_CCK_RATE)
tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK);
}
int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm,
struct sk_buff *beacon,
void *data, int len)
{
struct iwl_host_cmd cmd = {
.id = BEACON_TEMPLATE_CMD,
.flags = CMD_ASYNC,
};
cmd.len[0] = len;
cmd.data[0] = data;
cmd.dataflags[0] = 0;
cmd.len[1] = beacon->len;
cmd.data[1] = beacon->data;
cmd.dataflags[1] = IWL_HCMD_DFL_DUP;
return iwl_mvm_send_cmd(mvm, &cmd);
}
static int iwl_mvm_mac_ctxt_send_beacon_v6(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_mac_beacon_cmd_v6 beacon_cmd = {};
iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
if (vif->type == NL80211_IFTYPE_AP)
iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
&beacon_cmd.tim_size,
beacon->data, beacon->len);
return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
sizeof(beacon_cmd));
}
static int iwl_mvm_mac_ctxt_send_beacon_v7(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_mac_beacon_cmd_v7 beacon_cmd = {};
iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx);
beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
if (vif->type == NL80211_IFTYPE_AP)
iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
&beacon_cmd.tim_size,
beacon->data, beacon->len);
beacon_cmd.csa_offset =
cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
WLAN_EID_CHANNEL_SWITCH,
beacon->len));
beacon_cmd.ecsa_offset =
cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
WLAN_EID_EXT_CHANSWITCH_ANN,
beacon->len));
return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
sizeof(beacon_cmd));
}
static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct sk_buff *beacon)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(beacon);
struct iwl_mac_beacon_cmd beacon_cmd = {};
u8 rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
u16 flags;
struct ieee80211_chanctx_conf *ctx;
int channel;
flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
if (rate == IWL_FIRST_CCK_RATE)
flags |= IWL_MAC_BEACON_CCK;
/* Enable FILS on PSC channels only */
rcu_read_lock();
ctx = rcu_dereference(vif->chanctx_conf);
channel = ieee80211_frequency_to_channel(ctx->def.chan->center_freq);
WARN_ON(channel == 0);
if (cfg80211_channel_is_psc(ctx->def.chan) &&
!IWL_MVM_DISABLE_AP_FILS) {
flags |= IWL_MAC_BEACON_FILS;
beacon_cmd.short_ssid =
cpu_to_le32(~crc32_le(~0, vif->bss_conf.ssid,
vif->bss_conf.ssid_len));
}
rcu_read_unlock();
beacon_cmd.flags = cpu_to_le16(flags);
beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len);
beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id);
if (vif->type == NL80211_IFTYPE_AP)
iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx,
&beacon_cmd.tim_size,
beacon->data, beacon->len);
beacon_cmd.csa_offset =
cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
WLAN_EID_CHANNEL_SWITCH,
beacon->len));
beacon_cmd.ecsa_offset =
cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data,
WLAN_EID_EXT_CHANSWITCH_ANN,
beacon->len));
return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd,
sizeof(beacon_cmd));
}
int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct sk_buff *beacon)
{
if (WARN_ON(!beacon))
return -EINVAL;
if (IWL_MVM_NON_TRANSMITTING_AP)
return 0;
if (!fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD))
return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon);
if (fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_NEW_BEACON_TEMPLATE))
return iwl_mvm_mac_ctxt_send_beacon_v9(mvm, vif, beacon);
return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon);
}
/* 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_template(mvm->hw, vif, NULL);
if (!beacon)
return -ENOMEM;
#ifdef CONFIG_IWLWIFI_DEBUGFS
if (mvm->beacon_inject_active) {
dev_kfree_skb(beacon);
return -EBUSY;
}
#endif
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_ctx_cmd *cmd,
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
};
/* in AP mode, the MCAST FIFO takes the EDCA params from VO */
cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST);
/*
* in AP mode, pass probe requests and beacons from other APs
* (needed for ht protection); when there're no any associated
* station don't ask FW to pass beacons to prevent unnecessary
* wake-ups.
*/
cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST);
if (mvmvif->ap_assoc_sta_count || !mvm->drop_bcn_ap_mode) {
cmd->filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON);
IWL_DEBUG_HC(mvm, "Asking FW to pass beacons\n");
} else {
IWL_DEBUG_HC(mvm, "No need to receive beacons\n");
}
ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int);
ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int *
vif->bss_conf.dtim_period);
if (!fw_has_api(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_API_STA_TYPE))
ctxt_ap->mcast_qid = cpu_to_le32(mvmvif->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() % (64 - 36)) + 36;
mvmvif->ap_beacon_time = data.beacon_device_ts +
ieee80211_tu_to_usec(data.beacon_int * rand /
100);
} else {
mvmvif->ap_beacon_time = iwl_mvm_get_systime(mvm);
}
}
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, NULL, action);
/* Fill the data specific for ap mode */
iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &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, NULL, action);
/* Fill the data specific for GO mode */
iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd, &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, bool force_assoc_off,
const u8 *bssid_override)
{
switch (vif->type) {
case NL80211_IFTYPE_STATION:
return iwl_mvm_mac_ctxt_cmd_sta(mvm, vif, action,
force_assoc_off,
bssid_override);
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);
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,
true, NULL);
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,
bool force_assoc_off, const u8 *bssid_override)
{
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,
force_assoc_off, bssid_override);
}
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, 0,
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) {
__clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, mvm->hw->flags);
iwl_mvm_dealloc_snif_sta(mvm);
}
return 0;
}
static void iwl_mvm_csa_count_down(struct iwl_mvm *mvm,
struct ieee80211_vif *csa_vif, u32 gp2,
bool tx_success)
{
struct iwl_mvm_vif *mvmvif =
iwl_mvm_vif_from_mac80211(csa_vif);
/* Don't start to countdown from a failed beacon */
if (!tx_success && !mvmvif->csa_countdown)
return;
mvmvif->csa_countdown = true;
if (!ieee80211_beacon_cntdwn_is_complete(csa_vif)) {
int c = ieee80211_beacon_update_cntdwn(csa_vif);
iwl_mvm_mac_ctxt_beacon_changed(mvm, csa_vif);
if (csa_vif->p2p &&
!iwl_mvm_te_scheduled(&mvmvif->time_event_data) && gp2 &&
tx_success) {
u32 rel_time = (c + 1) *
csa_vif->bss_conf.beacon_int -
IWL_MVM_CHANNEL_SWITCH_TIME_GO;
u32 apply_time = gp2 + rel_time * 1024;
iwl_mvm_schedule_csa_period(mvm, csa_vif,
IWL_MVM_CHANNEL_SWITCH_TIME_GO -
IWL_MVM_CHANNEL_SWITCH_MARGIN,
apply_time);
}
} else if (!iwl_mvm_te_scheduled(&mvmvif->time_event_data)) {
/* we don't have CSA NoA scheduled yet, switch now */
ieee80211_csa_finish(csa_vif);
RCU_INIT_POINTER(mvm->csa_vif, NULL);
}
}
void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
struct iwl_extended_beacon_notif *beacon = (void *)pkt->data;
struct iwl_extended_beacon_notif_v5 *beacon_v5 = (void *)pkt->data;
struct ieee80211_vif *csa_vif;
struct ieee80211_vif *tx_blocked_vif;
struct agg_tx_status *agg_status;
u16 status;
lockdep_assert_held(&mvm->mutex);
mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
if (!iwl_mvm_is_short_beacon_notif_supported(mvm)) {
struct iwl_mvm_tx_resp *beacon_notify_hdr =
&beacon_v5->beacon_notify_hdr;
if (unlikely(pkt_len < sizeof(*beacon_v5)))
return;
mvm->ibss_manager = beacon_v5->ibss_mgr_status != 0;
agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr);
status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK;
IWL_DEBUG_RX(mvm,
"beacon status %#x retries:%d tsf:0x%016llX gp2:0x%X rate:%d\n",
status, beacon_notify_hdr->failure_frame,
le64_to_cpu(beacon->tsf),
mvm->ap_last_beacon_gp2,
le32_to_cpu(beacon_notify_hdr->initial_rate));
} else {
if (unlikely(pkt_len < sizeof(*beacon)))
return;
mvm->ibss_manager = beacon->ibss_mgr_status != 0;
status = le32_to_cpu(beacon->status) & TX_STATUS_MSK;
IWL_DEBUG_RX(mvm,
"beacon status %#x tsf:0x%016llX gp2:0x%X\n",
status, le64_to_cpu(beacon->tsf),
mvm->ap_last_beacon_gp2);
}
csa_vif = rcu_dereference_protected(mvm->csa_vif,
lockdep_is_held(&mvm->mutex));
if (unlikely(csa_vif && csa_vif->csa_active))
iwl_mvm_csa_count_down(mvm, csa_vif, mvm->ap_last_beacon_gp2,
(status == TX_STATUS_SUCCESS));
tx_blocked_vif = rcu_dereference_protected(mvm->csa_tx_blocked_vif,
lockdep_is_held(&mvm->mutex));
if (unlikely(tx_blocked_vif)) {
struct iwl_mvm_vif *mvmvif =
iwl_mvm_vif_from_mac80211(tx_blocked_vif);
/*
* The channel switch is started and we have blocked the
* stations. If this is the first beacon (the timeout wasn't
* set), set the unblock timeout, otherwise countdown
*/
if (!mvm->csa_tx_block_bcn_timeout)
mvm->csa_tx_block_bcn_timeout =
IWL_MVM_CS_UNBLOCK_TX_TIMEOUT;
else
mvm->csa_tx_block_bcn_timeout--;
/* Check if the timeout is expired, and unblock tx */
if (mvm->csa_tx_block_bcn_timeout == 0) {
iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, false);
RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
}
}
}
void iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_missed_beacons_notif *mb = (void *)pkt->data;
struct iwl_fw_dbg_trigger_missed_bcon *bcon_trig;
struct iwl_fw_dbg_trigger_tlv *trigger;
u32 stop_trig_missed_bcon, stop_trig_missed_bcon_since_rx;
u32 rx_missed_bcon, rx_missed_bcon_since_rx;
struct ieee80211_vif *vif;
u32 id = le32_to_cpu(mb->mac_id);
union iwl_dbg_tlv_tp_data tp_data = { .fw_pkt = pkt };
IWL_DEBUG_INFO(mvm,
"missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n",
le32_to_cpu(mb->mac_id),
le32_to_cpu(mb->consec_missed_beacons),
le32_to_cpu(mb->consec_missed_beacons_since_last_rx),
le32_to_cpu(mb->num_recvd_beacons),
le32_to_cpu(mb->num_expected_beacons));
rcu_read_lock();
vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true);
if (!vif)
goto out;
rx_missed_bcon = le32_to_cpu(mb->consec_missed_beacons);
rx_missed_bcon_since_rx =
le32_to_cpu(mb->consec_missed_beacons_since_last_rx);
/*
* TODO: the threshold should be adjusted based on latency conditions,
* and/or in case of a CS flow on one of the other AP vifs.
*/
if (rx_missed_bcon > IWL_MVM_MISSED_BEACONS_THRESHOLD_LONG)
iwl_mvm_connection_loss(mvm, vif, "missed beacons");
else if (rx_missed_bcon_since_rx > IWL_MVM_MISSED_BEACONS_THRESHOLD)
ieee80211_beacon_loss(vif);
iwl_dbg_tlv_time_point(&mvm->fwrt,
IWL_FW_INI_TIME_POINT_MISSED_BEACONS, &tp_data);
trigger = iwl_fw_dbg_trigger_on(&mvm->fwrt, ieee80211_vif_to_wdev(vif),
FW_DBG_TRIGGER_MISSED_BEACONS);
if (!trigger)
goto out;
bcon_trig = (void *)trigger->data;
stop_trig_missed_bcon = le32_to_cpu(bcon_trig->stop_consec_missed_bcon);
stop_trig_missed_bcon_since_rx =
le32_to_cpu(bcon_trig->stop_consec_missed_bcon_since_rx);
/* TODO: implement start trigger */
if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx ||
rx_missed_bcon >= stop_trig_missed_bcon)
iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL);
out:
rcu_read_unlock();
}
void iwl_mvm_rx_stored_beacon_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
struct iwl_stored_beacon_notif_common *sb = (void *)pkt->data;
struct ieee80211_rx_status rx_status;
struct sk_buff *skb;
u8 *data;
u32 size = le32_to_cpu(sb->byte_count);
int ver = iwl_fw_lookup_cmd_ver(mvm->fw, PROT_OFFLOAD_GROUP,
STORED_BEACON_NTF, 0);
if (size == 0)
return;
/* handle per-version differences */
if (ver <= 2) {
struct iwl_stored_beacon_notif_v2 *sb_v2 = (void *)pkt->data;
if (pkt_len < struct_size(sb_v2, data, size))
return;
data = sb_v2->data;
} else {
struct iwl_stored_beacon_notif_v3 *sb_v3 = (void *)pkt->data;
if (pkt_len < struct_size(sb_v3, data, size))
return;
data = sb_v3->data;
}
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb) {
IWL_ERR(mvm, "alloc_skb failed\n");
return;
}
/* update rx_status according to the notification's metadata */
memset(&rx_status, 0, sizeof(rx_status));
rx_status.mactime = le64_to_cpu(sb->tsf);
/* TSF as indicated by the firmware is at INA time */
rx_status.flag |= RX_FLAG_MACTIME_PLCP_START;
rx_status.device_timestamp = le32_to_cpu(sb->system_time);
rx_status.band =
(sb->band & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
rx_status.freq =
ieee80211_channel_to_frequency(le16_to_cpu(sb->channel),
rx_status.band);
/* copy the data */
skb_put_data(skb, data, size);
memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
/* pass it as regular rx to mac80211 */
ieee80211_rx_napi(mvm->hw, NULL, skb, NULL);
}
void iwl_mvm_probe_resp_data_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_probe_resp_data_notif *notif = (void *)pkt->data;
struct iwl_probe_resp_data *old_data, *new_data;
u32 id = le32_to_cpu(notif->mac_id);
struct ieee80211_vif *vif;
struct iwl_mvm_vif *mvmvif;
IWL_DEBUG_INFO(mvm, "Probe response data notif: noa %d, csa %d\n",
notif->noa_active, notif->csa_counter);
vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, false);
if (!vif)
return;
mvmvif = iwl_mvm_vif_from_mac80211(vif);
new_data = kzalloc(sizeof(*new_data), GFP_KERNEL);
if (!new_data)
return;
memcpy(&new_data->notif, notif, sizeof(new_data->notif));
/* noa_attr contains 1 reserved byte, need to substruct it */
new_data->noa_len = sizeof(struct ieee80211_vendor_ie) +
sizeof(new_data->notif.noa_attr) - 1;
/*
* If it's a one time NoA, only one descriptor is needed,
* adjust the length according to len_low.
*/
if (new_data->notif.noa_attr.len_low ==
sizeof(struct ieee80211_p2p_noa_desc) + 2)
new_data->noa_len -= sizeof(struct ieee80211_p2p_noa_desc);
old_data = rcu_dereference_protected(mvmvif->probe_resp_data,
lockdep_is_held(&mvmvif->mvm->mutex));
rcu_assign_pointer(mvmvif->probe_resp_data, new_data);
if (old_data)
kfree_rcu(old_data, rcu_head);
if (notif->csa_counter != IWL_PROBE_RESP_DATA_NO_CSA &&
notif->csa_counter >= 1)
ieee80211_beacon_set_cntdwn(vif, notif->csa_counter);
}
void iwl_mvm_channel_switch_noa_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_channel_switch_noa_notif *notif = (void *)pkt->data;
struct ieee80211_vif *csa_vif, *vif;
struct iwl_mvm_vif *mvmvif;
u32 id_n_color, csa_id, mac_id;
id_n_color = le32_to_cpu(notif->id_and_color);
mac_id = id_n_color & FW_CTXT_ID_MSK;
if (WARN_ON_ONCE(mac_id >= NUM_MAC_INDEX_DRIVER))
return;
rcu_read_lock();
vif = rcu_dereference(mvm->vif_id_to_mac[mac_id]);
mvmvif = iwl_mvm_vif_from_mac80211(vif);
switch (vif->type) {
case NL80211_IFTYPE_AP:
csa_vif = rcu_dereference(mvm->csa_vif);
if (WARN_ON(!csa_vif || !csa_vif->csa_active ||
csa_vif != vif))
goto out_unlock;
csa_id = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color);
if (WARN(csa_id != id_n_color,
"channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)",
csa_id, id_n_color))
goto out_unlock;
IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n");
schedule_delayed_work(&mvm->cs_tx_unblock_dwork,
msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT *
csa_vif->bss_conf.beacon_int));
ieee80211_csa_finish(csa_vif);
rcu_read_unlock();
RCU_INIT_POINTER(mvm->csa_vif, NULL);
return;
case NL80211_IFTYPE_STATION:
iwl_mvm_csa_client_absent(mvm, vif);
cancel_delayed_work(&mvmvif->csa_work);
ieee80211_chswitch_done(vif, true);
break;
default:
/* should never happen */
WARN_ON_ONCE(1);
break;
}
out_unlock:
rcu_read_unlock();
}
void iwl_mvm_rx_missed_vap_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_missed_vap_notif *mb = (void *)pkt->data;
struct ieee80211_vif *vif;
u32 id = le32_to_cpu(mb->mac_id);
IWL_DEBUG_INFO(mvm,
"missed_vap notify mac_id=%u, num_beacon_intervals_elapsed=%u, profile_periodicity=%u\n",
le32_to_cpu(mb->mac_id),
mb->num_beacon_intervals_elapsed,
mb->profile_periodicity);
rcu_read_lock();
vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true);
if (vif)
iwl_mvm_connection_loss(mvm, vif, "missed vap beacon");
rcu_read_unlock();
}