| /****************************************************************************** |
| * |
| * 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) |
| 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) | |
| 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 */ |
| for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { |
| u8 queue = find_first_zero_bit(&used_hw_queues, |
| mvm->first_agg_queue); |
| |
| if (queue >= mvm->first_agg_queue) { |
| IWL_ERR(mvm, "Failed to allocate queue\n"); |
| ret = -EIO; |
| goto exit_fail; |
| } |
| |
| __set_bit(queue, &used_hw_queues); |
| vif->hw_queue[ac] = queue; |
| } |
| |
| /* Allocate the CAB queue for softAP and GO interfaces */ |
| if (vif->type == NL80211_IFTYPE_AP) { |
| u8 queue = find_first_zero_bit(&used_hw_queues, |
| mvm->first_agg_queue); |
| |
| if (queue >= mvm->first_agg_queue) { |
| IWL_ERR(mvm, "Failed to allocate cab queue\n"); |
| ret = -EIO; |
| goto exit_fail; |
| } |
| |
| vif->cab_queue = queue; |
| } else { |
| vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; |
| } |
| |
| mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT; |
| mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; |
| |
| for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) |
| mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; |
| |
| return 0; |
| |
| exit_fail: |
| memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); |
| memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); |
| vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; |
| return ret; |
| } |
| |
| int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) |
| { |
| 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; |
| |
| 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); |
| |
| 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 ieee80211_band band, |
| u8 *cck_rates, u8 *ofdm_rates) |
| { |
| struct ieee80211_supported_band *sband; |
| unsigned long basic = vif->bss_conf.basic_rates; |
| int lowest_present_ofdm = 100; |
| int lowest_present_cck = 100; |
| u8 cck = 0; |
| u8 ofdm = 0; |
| int i; |
| |
| sband = mvm->hw->wiphy->bands[band]; |
| |
| for_each_set_bit(i, &basic, BITS_PER_LONG) { |
| int hw = sband->bitrates[i].hw_value; |
| if (hw >= IWL_FIRST_OFDM_RATE) { |
| ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); |
| if (lowest_present_ofdm > hw) |
| lowest_present_ofdm = hw; |
| } else { |
| BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); |
| |
| cck |= BIT(hw); |
| if (lowest_present_cck > hw) |
| lowest_present_cck = hw; |
| } |
| } |
| |
| /* |
| * Now we've got the basic rates as bitmaps in the ofdm and cck |
| * variables. This isn't sufficient though, as there might not |
| * be all the right rates in the bitmap. E.g. if the only basic |
| * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps |
| * and 6 Mbps because the 802.11-2007 standard says in 9.6: |
| * |
| * [...] a STA responding to a received frame shall transmit |
| * its Control Response frame [...] at the highest rate in the |
| * BSSBasicRateSet parameter that is less than or equal to the |
| * rate of the immediately previous frame in the frame exchange |
| * sequence ([...]) and that is of the same modulation class |
| * ([...]) as the received frame. If no rate contained in the |
| * BSSBasicRateSet parameter meets these conditions, then the |
| * control frame sent in response to a received frame shall be |
| * transmitted at the highest mandatory rate of the PHY that is |
| * less than or equal to the rate of the received frame, and |
| * that is of the same modulation class as the received frame. |
| * |
| * As a consequence, we need to add all mandatory rates that are |
| * lower than all of the basic rates to these bitmaps. |
| */ |
| |
| if (IWL_RATE_24M_INDEX < lowest_present_ofdm) |
| ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; |
| if (IWL_RATE_12M_INDEX < lowest_present_ofdm) |
| ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; |
| /* 6M already there or needed so always add */ |
| ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; |
| |
| /* |
| * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. |
| * Note, however: |
| * - if no CCK rates are basic, it must be ERP since there must |
| * be some basic rates at all, so they're OFDM => ERP PHY |
| * (or we're in 5 GHz, and the cck bitmap will never be used) |
| * - if 11M is a basic rate, it must be ERP as well, so add 5.5M |
| * - if 5.5M is basic, 1M and 2M are mandatory |
| * - if 2M is basic, 1M is mandatory |
| * - if 1M is basic, that's the only valid ACK rate. |
| * As a consequence, it's not as complicated as it sounds, just add |
| * any lower rates to the ACK rate bitmap. |
| */ |
| if (IWL_RATE_11M_INDEX < lowest_present_cck) |
| cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; |
| if (IWL_RATE_5M_INDEX < lowest_present_cck) |
| cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; |
| if (IWL_RATE_2M_INDEX < lowest_present_cck) |
| cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; |
| /* 1M already there or needed so always add */ |
| cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; |
| |
| *cck_rates = cck; |
| *ofdm_rates = ofdm; |
| } |
| |
| static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| struct iwl_mac_ctx_cmd *cmd) |
| { |
| /* for both sta and ap, ht_operation_mode hold the protection_mode */ |
| u8 protection_mode = vif->bss_conf.ht_operation_mode & |
| IEEE80211_HT_OP_MODE_PROTECTION; |
| /* The fw does not distinguish between ht and fat */ |
| u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; |
| |
| IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); |
| /* |
| * See section 9.23.3.1 of IEEE 80211-2012. |
| * Nongreenfield HT STAs Present is not supported. |
| */ |
| switch (protection_mode) { |
| case IEEE80211_HT_OP_MODE_PROTECTION_NONE: |
| break; |
| case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: |
| case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: |
| cmd->protection_flags |= cpu_to_le32(ht_flag); |
| break; |
| case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: |
| /* Protect when channel wider than 20MHz */ |
| if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) |
| cmd->protection_flags |= cpu_to_le32(ht_flag); |
| break; |
| default: |
| IWL_ERR(mvm, "Illegal protection mode %d\n", |
| protection_mode); |
| break; |
| } |
| } |
| |
| static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| struct iwl_mac_ctx_cmd *cmd, |
| 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 |
| : IEEE80211_BAND_2GHZ, |
| &cck_ack_rates, &ofdm_ack_rates); |
| rcu_read_unlock(); |
| |
| cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); |
| cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); |
| |
| cmd->cck_short_preamble = |
| cpu_to_le32(vif->bss_conf.use_short_preamble ? |
| MAC_FLG_SHORT_PREAMBLE : 0); |
| cmd->short_slot = |
| cpu_to_le32(vif->bss_conf.use_short_slot ? |
| MAC_FLG_SHORT_SLOT : 0); |
| |
| 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->type == NL80211_IFTYPE_AP) { |
| /* 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"); |
| } |
| } |
| |
| 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); |
| |
| 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, |
| struct iwl_mac_beacon_cmd *beacon_cmd, |
| u8 *beacon, u32 frame_size) |
| { |
| u32 tim_idx; |
| struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; |
| |
| /* The index is relative to frame start but we start looking at the |
| * variable-length part of the beacon. */ |
| tim_idx = mgmt->u.beacon.variable - beacon; |
| |
| /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ |
| while ((tim_idx < (frame_size - 2)) && |
| (beacon[tim_idx] != WLAN_EID_TIM)) |
| tim_idx += beacon[tim_idx+1] + 2; |
| |
| /* If TIM field was found, set variables */ |
| if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { |
| beacon_cmd->tim_idx = cpu_to_le32(tim_idx); |
| beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]); |
| } else { |
| IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); |
| } |
| } |
| |
| static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| struct sk_buff *beacon) |
| { |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| struct iwl_host_cmd cmd = { |
| .id = BEACON_TEMPLATE_CMD, |
| .flags = CMD_ASYNC, |
| }; |
| struct iwl_mac_beacon_cmd beacon_cmd = {}; |
| struct ieee80211_tx_info *info; |
| u32 beacon_skb_len; |
| u32 rate, tx_flags; |
| |
| if (WARN_ON(!beacon)) |
| return -EINVAL; |
| |
| beacon_skb_len = beacon->len; |
| |
| /* TODO: for now the beacon template id is set to be the mac context id. |
| * Might be better to handle it as another resource ... */ |
| beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); |
| info = IEEE80211_SKB_CB(beacon); |
| |
| /* Set up TX command fields */ |
| beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len); |
| beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id; |
| beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); |
| 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; |
| beacon_cmd.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); |
| } |
| |
| beacon_cmd.tx.rate_n_flags = |
| cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << |
| RATE_MCS_ANT_POS); |
| |
| if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) { |
| rate = IWL_FIRST_OFDM_RATE; |
| } else { |
| rate = IWL_FIRST_CCK_RATE; |
| beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); |
| } |
| beacon_cmd.tx.rate_n_flags |= |
| cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); |
| |
| /* Set up TX beacon command fields */ |
| if (vif->type == NL80211_IFTYPE_AP) |
| iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd, |
| beacon->data, |
| beacon_skb_len); |
| |
| /* Submit command */ |
| cmd.len[0] = sizeof(beacon_cmd); |
| cmd.data[0] = &beacon_cmd; |
| cmd.dataflags[0] = 0; |
| cmd.len[1] = beacon_skb_len; |
| cmd.data[1] = beacon->data; |
| cmd.dataflags[1] = IWL_HCMD_DFL_DUP; |
| |
| return iwl_mvm_send_cmd(mvm, &cmd); |
| } |
| |
| /* The beacon template for the AP/GO/IBSS has changed and needs update */ |
| int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif) |
| { |
| struct sk_buff *beacon; |
| int ret; |
| |
| WARN_ON(vif->type != NL80211_IFTYPE_AP && |
| vif->type != NL80211_IFTYPE_ADHOC); |
| |
| beacon = ieee80211_beacon_get_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_data_ap *ctxt_ap, |
| bool add) |
| { |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| struct iwl_mvm_mac_ap_iterator_data data = { |
| .mvm = mvm, |
| .vif = vif, |
| .beacon_device_ts = 0 |
| }; |
| |
| ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); |
| ctxt_ap->bi_reciprocal = |
| cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); |
| ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * |
| vif->bss_conf.dtim_period); |
| ctxt_ap->dtim_reciprocal = |
| cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * |
| vif->bss_conf.dtim_period)); |
| |
| ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); |
| |
| /* |
| * Only set the beacon time when the MAC is being added, when we |
| * just modify the MAC then we should keep the time -- the firmware |
| * can otherwise have a "jumping" TBTT. |
| */ |
| if (add) { |
| /* |
| * If there is a station/P2P client interface which is |
| * associated, set the AP's TBTT far enough from the station's |
| * TBTT. Otherwise, set it to the current system time |
| */ |
| ieee80211_iterate_active_interfaces_atomic( |
| mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, |
| iwl_mvm_mac_ap_iterator, &data); |
| |
| if (data.beacon_device_ts) { |
| u32 rand = (prandom_u32() % (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.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.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->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ? |
| IEEE80211_BAND_2GHZ : IEEE80211_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, skb, NULL); |
| } |