diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c | 1639 |
1 files changed, 1639 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c new file mode 100644 index 0000000..c5734e1 --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c @@ -0,0 +1,1639 @@ +/****************************************************************************** + * + * 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 + * Copyright(c) 2015 - 2016 Intel Deutschland 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 <linuxwifi@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 + * Copyright(c) 2015 - 2016 Intel Deutschland 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 <linux/etherdevice.h> +#include <net/mac80211.h> +#include "iwl-io.h" +#include "iwl-prph.h" +#include "fw-api.h" +#include "mvm.h" +#include "time-event.h" +#include "fw-dbg.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)]; + enum iwl_tsf_id preferred_tsf; + bool found_vif; +}; + +struct iwl_mvm_hw_queues_iface_iterator_data { + struct ieee80211_vif *exclude_vif; + unsigned long used_hw_queues; +}; + +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 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 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; +} + +/* + * Get the mask of the queues used by the vif + */ +u32 iwl_mvm_mac_get_queues_mask(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]); + } + + if (vif->type == NL80211_IFTYPE_AP || + vif->type == NL80211_IFTYPE_ADHOC) + qmask |= BIT(vif->cab_queue); + + return qmask; +} + +static void iwl_mvm_iface_hw_queues_iter(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; + + /* exclude the given vif */ + if (vif == data->exclude_vif) + return; + + data->used_hw_queues |= iwl_mvm_mac_get_queues_mask(vif); +} + +static void iwl_mvm_mac_sta_hw_queues_iter(void *_data, + struct ieee80211_sta *sta) +{ + struct iwl_mvm_hw_queues_iface_iterator_data *data = _data; + struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); + + /* Mark the queues used by the sta */ + data->used_hw_queues |= mvmsta->tfd_queue_msk; +} + +unsigned long iwl_mvm_get_used_hw_queues(struct iwl_mvm *mvm, + struct ieee80211_vif *exclude_vif) +{ + u8 sta_id; + struct iwl_mvm_hw_queues_iface_iterator_data data = { + .exclude_vif = exclude_vif, + .used_hw_queues = + BIT(IWL_MVM_OFFCHANNEL_QUEUE) | + BIT(mvm->aux_queue), + }; + + if (iwl_mvm_is_dqa_supported(mvm)) + data.used_hw_queues |= BIT(IWL_MVM_DQA_CMD_QUEUE); + else + data.used_hw_queues |= BIT(IWL_MVM_CMD_QUEUE); + + lockdep_assert_held(&mvm->mutex); + + /* mark all VIF used hw queues */ + ieee80211_iterate_active_interfaces_atomic( + mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + iwl_mvm_iface_hw_queues_iter, &data); + + /* don't assign the same hw queues as TDLS stations */ + ieee80211_iterate_stations_atomic(mvm->hw, + iwl_mvm_mac_sta_hw_queues_iter, + &data); + + /* + * Some TDLS stations may be removed but are in the process of being + * drained. Don't touch their queues. + */ + for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) + data.used_hw_queues |= mvm->tfd_drained[sta_id]; + + return data.used_hw_queues; +} + +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); +} + +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, + .found_vif = false, + }; + u32 ac; + int ret, i; + unsigned long used_hw_queues; + + /* + * 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); + + used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, vif); + + /* + * 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. When in + * DQA-mode they aren't really used, and this is done only so the + * mac80211 ieee80211_check_queues() function won't fail + */ + for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { + u8 queue = find_first_zero_bit(&used_hw_queues, + mvm->first_agg_queue); + + if (!iwl_mvm_is_dqa_supported(mvm) && + queue >= mvm->first_agg_queue) { + IWL_ERR(mvm, "Failed to allocate queue\n"); + ret = -EIO; + goto exit_fail; + } + + __set_bit(queue, &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; + + if (!iwl_mvm_is_dqa_supported(mvm)) { + queue = find_first_zero_bit(&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; + } + } else { + queue = IWL_MVM_DQA_GCAST_QUEUE; + } + + 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) +{ + unsigned int wdg_timeout = + iwl_mvm_get_wd_timeout(mvm, vif, false, false); + u32 ac; + int ret; + + lockdep_assert_held(&mvm->mutex); + + ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); + if (ret) + return ret; + + /* If DQA is supported - queues will be enabled when needed */ + if (iwl_mvm_is_dqa_supported(mvm)) + return 0; + + switch (vif->type) { + case NL80211_IFTYPE_P2P_DEVICE: + iwl_mvm_enable_ac_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, + IWL_MVM_OFFCHANNEL_QUEUE, + IWL_MVM_TX_FIFO_VO, 0, wdg_timeout); + break; + case NL80211_IFTYPE_AP: + iwl_mvm_enable_ac_txq(mvm, vif->cab_queue, vif->cab_queue, + IWL_MVM_TX_FIFO_MCAST, 0, wdg_timeout); + /* fall through */ + default: + for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) + iwl_mvm_enable_ac_txq(mvm, vif->hw_queue[ac], + vif->hw_queue[ac], + iwl_mvm_ac_to_tx_fifo[ac], 0, + wdg_timeout); + break; + } + + return 0; +} + +void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) +{ + int ac; + + lockdep_assert_held(&mvm->mutex); + + /* + * If DQA is supported - queues were already disabled, since in + * DQA-mode the queues are a property of the STA and not of the + * vif, and at this point the STA was already deleted + */ + if (iwl_mvm_is_dqa_supported(mvm)) + return; + + switch (vif->type) { + case NL80211_IFTYPE_P2P_DEVICE: + iwl_mvm_disable_txq(mvm, IWL_MVM_OFFCHANNEL_QUEUE, + IWL_MVM_OFFCHANNEL_QUEUE, + IWL_MAX_TID_COUNT, 0); + + break; + case NL80211_IFTYPE_AP: + iwl_mvm_disable_txq(mvm, vif->cab_queue, vif->cab_queue, + IWL_MAX_TID_COUNT, 0); + /* fall through */ + default: + for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) + iwl_mvm_disable_txq(mvm, vif->hw_queue[ac], + vif->hw_queue[ac], + IWL_MAX_TID_COUNT, 0); + } +} + +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 = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); + + 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); + } + + 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) { + 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); + + /* 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->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); + + if (vif->probe_req_reg && vif->bss_conf.assoc && vif->p2p) + cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); + + 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 = 0; + int ret, i; + + WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); + + iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); + + if (!iwl_mvm_is_dqa_supported(mvm)) { + for (i = 0; i < IEEE80211_NUM_ACS; i++) + if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) + tfd_queue_msk |= BIT(vif->hw_queue[i]); + } + + 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); + 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); + 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); + + /* 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, NULL, 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, + __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; +} + +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, + }; + union { + struct iwl_mac_beacon_cmd_v6 beacon_cmd_v6; + struct iwl_mac_beacon_cmd_v7 beacon_cmd; + } u = {}; + struct iwl_mac_beacon_cmd beacon_cmd; + struct ieee80211_tx_info *info; + u32 beacon_skb_len; + u32 rate, tx_flags; + + if (WARN_ON(!beacon)) + return -EINVAL; + + beacon_skb_len = beacon->len; + + if (fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) { + u32 csa_offset, ecsa_offset; + + csa_offset = iwl_mvm_find_ie_offset(beacon->data, + WLAN_EID_CHANNEL_SWITCH, + beacon_skb_len); + ecsa_offset = + iwl_mvm_find_ie_offset(beacon->data, + WLAN_EID_EXT_CHANSWITCH_ANN, + beacon_skb_len); + + if (iwl_mvm_has_new_tx_api(mvm)) { + beacon_cmd.data.template_id = + cpu_to_le32((u32)mvmvif->id); + beacon_cmd.data.ecsa_offset = cpu_to_le32(ecsa_offset); + beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); + beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon_skb_len); + if (vif->type == NL80211_IFTYPE_AP) + iwl_mvm_mac_ctxt_set_tim(mvm, + &beacon_cmd.data.tim_idx, + &beacon_cmd.data.tim_size, + beacon->data, + beacon_skb_len); + cmd.len[0] = sizeof(beacon_cmd); + cmd.data[0] = &beacon_cmd; + goto send; + + } else { + u.beacon_cmd.data.ecsa_offset = + cpu_to_le32(ecsa_offset); + u.beacon_cmd.data.csa_offset = cpu_to_le32(csa_offset); + cmd.len[0] = sizeof(u.beacon_cmd); + cmd.data[0] = &u; + } + } else { + cmd.len[0] = sizeof(u.beacon_cmd_v6); + cmd.data[0] = &u; + } + + /* TODO: for now the beacon template id is set to be the mac context id. + * Might be better to handle it as another resource ... */ + u.beacon_cmd_v6.template_id = cpu_to_le32((u32)mvmvif->id); + info = IEEE80211_SKB_CB(beacon); + + /* Set up TX command fields */ + u.beacon_cmd_v6.tx.len = cpu_to_le16((u16)beacon_skb_len); + u.beacon_cmd_v6.tx.sta_id = mvmvif->bcast_sta.sta_id; + u.beacon_cmd_v6.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; + u.beacon_cmd_v6.tx.tx_flags = cpu_to_le32(tx_flags); + + if (!fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { + mvm->mgmt_last_antenna_idx = + iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), + mvm->mgmt_last_antenna_idx); + } + + u.beacon_cmd_v6.tx.rate_n_flags = + cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << + RATE_MCS_ANT_POS); + + if (info->band == NL80211_BAND_5GHZ || vif->p2p) { + rate = IWL_FIRST_OFDM_RATE; + } else { + rate = IWL_FIRST_CCK_RATE; + u.beacon_cmd_v6.tx.rate_n_flags |= + cpu_to_le32(RATE_MCS_CCK_MSK); + } + u.beacon_cmd_v6.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, &u.beacon_cmd_v6.tim_idx, + &u.beacon_cmd_v6.tim_size, + beacon->data, + beacon_skb_len); + +send: + /* Submit command */ + 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_template(mvm->hw, vif, NULL); + 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_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->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() % (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_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, 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); + 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, + 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_csa_is_complete(csa_vif)) { + int c = ieee80211_csa_update_counter(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); + struct iwl_extended_beacon_notif *beacon = (void *)pkt->data; + struct iwl_mvm_tx_resp *beacon_notify_hdr; + struct ieee80211_vif *csa_vif; + struct ieee80211_vif *tx_blocked_vif; + u16 status; + + lockdep_assert_held(&mvm->mutex); + + beacon_notify_hdr = &beacon->beacon_notify_hdr; + mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); + + status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK; + IWL_DEBUG_RX(mvm, + "beacon status %#x retries:%d tsf:0x%16llX 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)); + + 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); + } + } +} + +static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_missed_beacons_notif *missed_beacons = _data; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm *mvm = mvmvif->mvm; + 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; + + if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) + return; + + rx_missed_bcon = le32_to_cpu(missed_beacons->consec_missed_beacons); + rx_missed_bcon_since_rx = + le32_to_cpu(missed_beacons->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 (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > + IWL_MVM_MISSED_BEACONS_THRESHOLD) + ieee80211_beacon_loss(vif); + + if (!iwl_fw_dbg_trigger_enabled(mvm->fw, + FW_DBG_TRIGGER_MISSED_BEACONS)) + return; + + trigger = iwl_fw_dbg_get_trigger(mvm->fw, + FW_DBG_TRIGGER_MISSED_BEACONS); + 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 (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trigger)) + return; + + if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || + rx_missed_bcon >= stop_trig_missed_bcon) + iwl_mvm_fw_dbg_collect_trig(mvm, trigger, 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; + + 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)); + + ieee80211_iterate_active_interfaces_atomic(mvm->hw, + IEEE80211_IFACE_ITER_NORMAL, + iwl_mvm_beacon_loss_iterator, + mb); +} + +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); + struct iwl_stored_beacon_notif *sb = (void *)pkt->data; + struct ieee80211_rx_status rx_status; + struct sk_buff *skb; + u32 size = le32_to_cpu(sb->byte_count); + + if (size == 0) + return; + + 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 */ + memcpy(skb_put(skb, size), sb->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_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; + struct iwl_mvm_vif *mvmvif; + int len = iwl_rx_packet_payload_len(pkt); + u32 id_n_color; + + if (WARN_ON_ONCE(len < sizeof(*notif))) + return; + + rcu_read_lock(); + + csa_vif = rcu_dereference(mvm->csa_vif); + if (WARN_ON(!csa_vif || !csa_vif->csa_active)) + goto out_unlock; + + id_n_color = le32_to_cpu(notif->id_and_color); + + mvmvif = iwl_mvm_vif_from_mac80211(csa_vif); + if (WARN(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color) != id_n_color, + "channel switch noa notification on unexpected vif (csa_vif=%d, notif=%d)", + FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color), id_n_color)) + goto out_unlock; + + IWL_DEBUG_INFO(mvm, "Channel Switch Started Notification\n"); + + queue_delayed_work(system_wq, &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; + +out_unlock: + rcu_read_unlock(); +} |