/****************************************************************************** * * 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 - 2017 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 * 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 - 2017 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 #include #include "iwl-io.h" #include "iwl-prph.h" #include "fw-api.h" #include "mvm.h" #include "time-event.h" const u8 iwl_mvm_ac_to_tx_fifo[] = { IWL_MVM_TX_FIFO_VO, IWL_MVM_TX_FIFO_VI, IWL_MVM_TX_FIFO_BE, IWL_MVM_TX_FIFO_BK, }; const u8 iwl_mvm_ac_to_gen2_tx_fifo[] = { IWL_GEN2_EDCA_TX_FIFO_VO, IWL_GEN2_EDCA_TX_FIFO_VI, IWL_GEN2_EDCA_TX_FIFO_BE, IWL_GEN2_EDCA_TX_FIFO_BK, }; 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_GCAST_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); /* * for DQA, the hw_queue in mac80211 is never really used for * real traffic (only the few queue IDs covered above), so * we can reuse the real HW queue IDs the stations use */ if (iwl_mvm_is_dqa_supported(mvm)) return data.used_hw_queues; /* 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, queue_limit; 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; } if (iwl_mvm_is_dqa_supported(mvm)) { /* * queues in mac80211 almost entirely independent of * the ones here - no real limit */ queue_limit = IEEE80211_MAX_QUEUES; BUILD_BUG_ON(IEEE80211_MAX_QUEUES > BITS_PER_BYTE * sizeof(mvm->hw_queue_to_mac80211[0])); } else { /* need to not use too many in this case */ queue_limit = mvm->first_agg_queue; } /* * 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, queue_limit); if (queue >= queue_limit) { 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; } /* * For TVQM this will be overwritten later with the FW assigned * queue value (when queue is enabled). */ mvmvif->cab_queue = queue; vif->cab_queue = queue; } else { vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; } mvmvif->bcast_sta.sta_id = IWL_MVM_INVALID_STA; mvmvif->mcast_sta.sta_id = IWL_MVM_INVALID_STA; mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; return 0; exit_fail: memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); 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_mac_ac_to_tx_fifo(mvm, 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); ctxt_sta->assoc_beacon_arrive_time = cpu_to_le32(vif->bss_conf.sync_device_ts); IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", le64_to_cpu(ctxt_sta->dtim_tsf), le32_to_cpu(ctxt_sta->dtim_time), dtim_offs); ctxt_sta->is_assoc = cpu_to_le32(1); } 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, IWL_STA_GENERAL_PURPOSE); if (ret) return ret; return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mac_ctx_cmd cmd = {}; WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, NULL, action); cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | MAC_FILTER_IN_PROBE_REQUEST); /* 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 void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct sk_buff *beacon, struct iwl_tx_cmd *tx) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct ieee80211_tx_info *info; u32 rate, tx_flags; info = IEEE80211_SKB_CB(beacon); /* Set up TX command fields */ tx->len = cpu_to_le16((u16)beacon->len); tx->sta_id = mvmvif->bcast_sta.sta_id; tx->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); tx_flags = TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_TSF; tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, (void *)beacon->data, info, 0) << TX_CMD_FLG_BT_PRIO_POS; tx->tx_flags = cpu_to_le32(tx_flags); if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEACON_ANT_SELECTION)) { mvm->mgmt_last_antenna_idx = iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), mvm->mgmt_last_antenna_idx); } tx->rate_n_flags = cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS); if (info->band == NL80211_BAND_5GHZ || vif->p2p) { rate = IWL_FIRST_OFDM_RATE; } else { rate = IWL_FIRST_CCK_RATE; tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); } tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); } static int iwl_mvm_mac_ctxt_send_beacon_cmd(struct iwl_mvm *mvm, struct sk_buff *beacon, void *data, int len) { struct iwl_host_cmd cmd = { .id = BEACON_TEMPLATE_CMD, .flags = CMD_ASYNC, }; cmd.len[0] = len; cmd.data[0] = data; cmd.dataflags[0] = 0; cmd.len[1] = beacon->len; cmd.data[1] = beacon->data; cmd.dataflags[1] = IWL_HCMD_DFL_DUP; return iwl_mvm_send_cmd(mvm, &cmd); } static int iwl_mvm_mac_ctxt_send_beacon_v6(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct sk_buff *beacon) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mac_beacon_cmd_v6 beacon_cmd = {}; iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); if (vif->type == NL80211_IFTYPE_AP) iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, &beacon_cmd.tim_size, beacon->data, beacon->len); return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, sizeof(beacon_cmd)); } static int iwl_mvm_mac_ctxt_send_beacon_v7(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct sk_buff *beacon) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mac_beacon_cmd_v7 beacon_cmd = {}; iwl_mvm_mac_ctxt_set_tx(mvm, vif, beacon, &beacon_cmd.tx); beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); if (vif->type == NL80211_IFTYPE_AP) iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, &beacon_cmd.tim_size, beacon->data, beacon->len); beacon_cmd.csa_offset = cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, WLAN_EID_CHANNEL_SWITCH, beacon->len)); beacon_cmd.ecsa_offset = cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, WLAN_EID_EXT_CHANSWITCH_ANN, beacon->len)); return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, sizeof(beacon_cmd)); } static int iwl_mvm_mac_ctxt_send_beacon_v8(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct sk_buff *beacon) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mac_beacon_cmd beacon_cmd = {}; beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len); beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); if (vif->type == NL80211_IFTYPE_AP) iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd.tim_idx, &beacon_cmd.tim_size, beacon->data, beacon->len); beacon_cmd.csa_offset = cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, WLAN_EID_CHANNEL_SWITCH, beacon->len)); beacon_cmd.ecsa_offset = cpu_to_le32(iwl_mvm_find_ie_offset(beacon->data, WLAN_EID_EXT_CHANSWITCH_ANN, beacon->len)); return iwl_mvm_mac_ctxt_send_beacon_cmd(mvm, beacon, &beacon_cmd, sizeof(beacon_cmd)); } static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct sk_buff *beacon) { if (WARN_ON(!beacon)) return -EINVAL; if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_CSA_AND_TBTT_OFFLOAD)) return iwl_mvm_mac_ctxt_send_beacon_v6(mvm, vif, beacon); if (!iwl_mvm_has_new_tx_api(mvm)) return iwl_mvm_mac_ctxt_send_beacon_v7(mvm, vif, beacon); return iwl_mvm_mac_ctxt_send_beacon_v8(mvm, vif, beacon); } /* The beacon template for the AP/GO/IBSS has changed and needs update */ int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct sk_buff *beacon; int ret; WARN_ON(vif->type != NL80211_IFTYPE_AP && vif->type != NL80211_IFTYPE_ADHOC); beacon = ieee80211_beacon_get_template(mvm->hw, vif, NULL); if (!beacon) return -ENOMEM; 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)); if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 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; struct agg_tx_status *agg_status; u16 status; lockdep_assert_held(&mvm->mutex); beacon_notify_hdr = &beacon->beacon_notify_hdr; mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2); mvm->ibss_manager = beacon->ibss_mgr_status != 0; agg_status = iwl_mvm_get_agg_status(mvm, beacon_notify_hdr); status = le16_to_cpu(agg_status->status) & TX_STATUS_MSK; IWL_DEBUG_RX(mvm, "beacon status %#x retries:%d tsf:0x%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->fwrt, ieee80211_vif_to_wdev(vif), trigger)) return; if (rx_missed_bcon_since_rx >= stop_trig_missed_bcon_since_rx || rx_missed_bcon >= stop_trig_missed_bcon) iwl_fw_dbg_collect_trig(&mvm->fwrt, trigger, NULL); } 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 */ skb_put_data(skb, 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"); schedule_delayed_work(&mvm->cs_tx_unblock_dwork, msecs_to_jiffies(IWL_MVM_CS_UNBLOCK_TX_TIMEOUT * csa_vif->bss_conf.beacon_int)); ieee80211_csa_finish(csa_vif); rcu_read_unlock(); RCU_INIT_POINTER(mvm->csa_vif, NULL); return; out_unlock: rcu_read_unlock(); }