/****************************************************************************** * * 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 * * 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 * 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 "mvm.h" #include "sta.h" #include "rs.h" static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm, enum nl80211_iftype iftype) { int sta_id; u32 reserved_ids = 0; BUILD_BUG_ON(IWL_MVM_STATION_COUNT > 32); WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); lockdep_assert_held(&mvm->mutex); /* d0i3/d3 assumes the AP's sta_id (of sta vif) is 0. reserve it. */ if (iftype != NL80211_IFTYPE_STATION) reserved_ids = BIT(0); /* Don't take rcu_read_lock() since we are protected by mvm->mutex */ for (sta_id = 0; sta_id < IWL_MVM_STATION_COUNT; sta_id++) { if (BIT(sta_id) & reserved_ids) continue; if (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex))) return sta_id; } return IWL_MVM_STATION_COUNT; } /* send station add/update command to firmware */ int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, bool update) { struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_add_sta_cmd add_sta_cmd = { .sta_id = mvm_sta->sta_id, .mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color), .add_modify = update ? 1 : 0, .station_flags_msk = cpu_to_le32(STA_FLG_FAT_EN_MSK | STA_FLG_MIMO_EN_MSK), }; int ret; u32 status; u32 agg_size = 0, mpdu_dens = 0; if (!update) { add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); } switch (sta->bandwidth) { case IEEE80211_STA_RX_BW_160: add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_160MHZ); /* fall through */ case IEEE80211_STA_RX_BW_80: add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_80MHZ); /* fall through */ case IEEE80211_STA_RX_BW_40: add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_40MHZ); /* fall through */ case IEEE80211_STA_RX_BW_20: if (sta->ht_cap.ht_supported) add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_FAT_EN_20MHZ); break; } switch (sta->rx_nss) { case 1: add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); break; case 2: add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO2); break; case 3 ... 8: add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_MIMO3); break; } switch (sta->smps_mode) { case IEEE80211_SMPS_AUTOMATIC: case IEEE80211_SMPS_NUM_MODES: WARN_ON(1); break; case IEEE80211_SMPS_STATIC: /* override NSS */ add_sta_cmd.station_flags &= ~cpu_to_le32(STA_FLG_MIMO_EN_MSK); add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_MIMO_EN_SISO); break; case IEEE80211_SMPS_DYNAMIC: add_sta_cmd.station_flags |= cpu_to_le32(STA_FLG_RTS_MIMO_PROT); break; case IEEE80211_SMPS_OFF: /* nothing */ break; } if (sta->ht_cap.ht_supported) { add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_MAX_AGG_SIZE_MSK | STA_FLG_AGG_MPDU_DENS_MSK); mpdu_dens = sta->ht_cap.ampdu_density; } if (sta->vht_cap.vht_supported) { agg_size = sta->vht_cap.cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; agg_size >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; } else if (sta->ht_cap.ht_supported) { agg_size = sta->ht_cap.ampdu_factor; } add_sta_cmd.station_flags |= cpu_to_le32(agg_size << STA_FLG_MAX_AGG_SIZE_SHIFT); add_sta_cmd.station_flags |= cpu_to_le32(mpdu_dens << STA_FLG_AGG_MPDU_DENS_SHIFT); status = ADD_STA_SUCCESS; ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(add_sta_cmd), &add_sta_cmd, &status); if (ret) return ret; switch (status) { case ADD_STA_SUCCESS: IWL_DEBUG_ASSOC(mvm, "ADD_STA PASSED\n"); break; default: ret = -EIO; IWL_ERR(mvm, "ADD_STA failed\n"); break; } return ret; } static int iwl_mvm_tdls_sta_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta) { unsigned long used_hw_queues; struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); u32 ac; lockdep_assert_held(&mvm->mutex); used_hw_queues = iwl_mvm_get_used_hw_queues(mvm, NULL); /* 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 STA queue\n"); return -EBUSY; } __set_bit(queue, &used_hw_queues); mvmsta->hw_queue[ac] = queue; } /* Found a place for all queues - enable them */ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { iwl_mvm_enable_ac_txq(mvm, mvmsta->hw_queue[ac], iwl_mvm_ac_to_tx_fifo[ac]); mvmsta->tfd_queue_msk |= BIT(mvmsta->hw_queue[ac]); } return 0; } static void iwl_mvm_tdls_sta_deinit(struct iwl_mvm *mvm, struct ieee80211_sta *sta) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); unsigned long sta_msk; int i; lockdep_assert_held(&mvm->mutex); /* disable the TDLS STA-specific queues */ sta_msk = mvmsta->tfd_queue_msk; for_each_set_bit(i, &sta_msk, sizeof(sta_msk)) iwl_mvm_disable_txq(mvm, i, 0); } int iwl_mvm_add_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); int i, ret, sta_id; lockdep_assert_held(&mvm->mutex); if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) sta_id = iwl_mvm_find_free_sta_id(mvm, ieee80211_vif_type_p2p(vif)); else sta_id = mvm_sta->sta_id; if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT)) return -ENOSPC; spin_lock_init(&mvm_sta->lock); mvm_sta->sta_id = sta_id; mvm_sta->mac_id_n_color = FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color); mvm_sta->vif = vif; mvm_sta->max_agg_bufsize = LINK_QUAL_AGG_FRAME_LIMIT_DEF; mvm_sta->tx_protection = 0; mvm_sta->tt_tx_protection = false; /* HW restart, don't assume the memory has been zeroed */ atomic_set(&mvm->pending_frames[sta_id], 0); mvm_sta->tid_disable_agg = 0; mvm_sta->tfd_queue_msk = 0; /* allocate new queues for a TDLS station */ if (sta->tdls) { ret = iwl_mvm_tdls_sta_init(mvm, sta); if (ret) return ret; } else { for (i = 0; i < IEEE80211_NUM_ACS; i++) if (vif->hw_queue[i] != IEEE80211_INVAL_HW_QUEUE) mvm_sta->tfd_queue_msk |= BIT(vif->hw_queue[i]); } /* for HW restart - reset everything but the sequence number */ for (i = 0; i < IWL_MAX_TID_COUNT; i++) { u16 seq = mvm_sta->tid_data[i].seq_number; memset(&mvm_sta->tid_data[i], 0, sizeof(mvm_sta->tid_data[i])); mvm_sta->tid_data[i].seq_number = seq; } mvm_sta->agg_tids = 0; ret = iwl_mvm_sta_send_to_fw(mvm, sta, false); if (ret) goto err; if (vif->type == NL80211_IFTYPE_STATION) { if (!sta->tdls) { WARN_ON(mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT); mvmvif->ap_sta_id = sta_id; } else { WARN_ON(mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT); } } rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); return 0; err: iwl_mvm_tdls_sta_deinit(mvm, sta); return ret; } int iwl_mvm_update_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { return iwl_mvm_sta_send_to_fw(mvm, sta, true); } int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, bool drain) { struct iwl_mvm_add_sta_cmd cmd = {}; int ret; u32 status; lockdep_assert_held(&mvm->mutex); cmd.mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color); cmd.sta_id = mvmsta->sta_id; cmd.add_modify = STA_MODE_MODIFY; cmd.station_flags = drain ? cpu_to_le32(STA_FLG_DRAIN_FLOW) : 0; cmd.station_flags_msk = cpu_to_le32(STA_FLG_DRAIN_FLOW); status = ADD_STA_SUCCESS; ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), &cmd, &status); if (ret) return ret; switch (status) { case ADD_STA_SUCCESS: IWL_DEBUG_INFO(mvm, "Frames for staid %d will drained in fw\n", mvmsta->sta_id); break; default: ret = -EIO; IWL_ERR(mvm, "Couldn't drain frames for staid %d\n", mvmsta->sta_id); break; } return ret; } /* * Remove a station from the FW table. Before sending the command to remove * the station validate that the station is indeed known to the driver (sanity * only). */ static int iwl_mvm_rm_sta_common(struct iwl_mvm *mvm, u8 sta_id) { struct ieee80211_sta *sta; struct iwl_mvm_rm_sta_cmd rm_sta_cmd = { .sta_id = sta_id, }; int ret; sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex)); /* Note: internal stations are marked as error values */ if (!sta) { IWL_ERR(mvm, "Invalid station id\n"); return -EINVAL; } ret = iwl_mvm_send_cmd_pdu(mvm, REMOVE_STA, 0, sizeof(rm_sta_cmd), &rm_sta_cmd); if (ret) { IWL_ERR(mvm, "Failed to remove station. Id=%d\n", sta_id); return ret; } return 0; } void iwl_mvm_sta_drained_wk(struct work_struct *wk) { struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, sta_drained_wk); u8 sta_id; /* * The mutex is needed because of the SYNC cmd, but not only: if the * work would run concurrently with iwl_mvm_rm_sta, it would run before * iwl_mvm_rm_sta sets the station as busy, and exit. Then * iwl_mvm_rm_sta would set the station as busy, and nobody will clean * that later. */ mutex_lock(&mvm->mutex); for_each_set_bit(sta_id, mvm->sta_drained, IWL_MVM_STATION_COUNT) { int ret; struct ieee80211_sta *sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex)); /* * This station is in use or RCU-removed; the latter happens in * managed mode, where mac80211 removes the station before we * can remove it from firmware (we can only do that after the * MAC is marked unassociated), and possibly while the deauth * frame to disconnect from the AP is still queued. Then, the * station pointer is -ENOENT when the last skb is reclaimed. */ if (!IS_ERR(sta) || PTR_ERR(sta) == -ENOENT) continue; if (PTR_ERR(sta) == -EINVAL) { IWL_ERR(mvm, "Drained sta %d, but it is internal?\n", sta_id); continue; } if (!sta) { IWL_ERR(mvm, "Drained sta %d, but it was NULL?\n", sta_id); continue; } WARN_ON(PTR_ERR(sta) != -EBUSY); /* This station was removed and we waited until it got drained, * we can now proceed and remove it. */ ret = iwl_mvm_rm_sta_common(mvm, sta_id); if (ret) { IWL_ERR(mvm, "Couldn't remove sta %d after it was drained\n", sta_id); continue; } RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); clear_bit(sta_id, mvm->sta_drained); if (mvm->tfd_drained[sta_id]) { unsigned long i, msk = mvm->tfd_drained[sta_id]; for_each_set_bit(i, &msk, sizeof(msk)) iwl_mvm_disable_txq(mvm, i, 0); mvm->tfd_drained[sta_id] = 0; IWL_DEBUG_TDLS(mvm, "Drained sta %d, with queues %ld\n", sta_id, msk); } } mutex_unlock(&mvm->mutex); } int iwl_mvm_rm_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); int ret; lockdep_assert_held(&mvm->mutex); if (vif->type == NL80211_IFTYPE_STATION && mvmvif->ap_sta_id == mvm_sta->sta_id) { /* flush its queues here since we are freeing mvm_sta */ ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true); /* if we are associated - we can't remove the AP STA now */ if (vif->bss_conf.assoc) return ret; /* unassoc - go ahead - remove the AP STA now */ mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; /* clear d0i3_ap_sta_id if no longer relevant */ if (mvm->d0i3_ap_sta_id == mvm_sta->sta_id) mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT; } /* * This shouldn't happen - the TDLS channel switch should be canceled * before the STA is removed. */ if (WARN_ON_ONCE(mvm->tdls_cs.peer.sta_id == mvm_sta->sta_id)) { mvm->tdls_cs.peer.sta_id = IWL_MVM_STATION_COUNT; cancel_delayed_work(&mvm->tdls_cs.dwork); } /* * Make sure that the tx response code sees the station as -EBUSY and * calls the drain worker. */ spin_lock_bh(&mvm_sta->lock); /* * There are frames pending on the AC queues for this station. * We need to wait until all the frames are drained... */ if (atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) { rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], ERR_PTR(-EBUSY)); spin_unlock_bh(&mvm_sta->lock); /* disable TDLS sta queues on drain complete */ if (sta->tdls) { mvm->tfd_drained[mvm_sta->sta_id] = mvm_sta->tfd_queue_msk; IWL_DEBUG_TDLS(mvm, "Draining TDLS sta %d\n", mvm_sta->sta_id); } ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); } else { spin_unlock_bh(&mvm_sta->lock); if (sta->tdls) iwl_mvm_tdls_sta_deinit(mvm, sta); ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); RCU_INIT_POINTER(mvm->fw_id_to_mac_id[mvm_sta->sta_id], NULL); } return ret; } int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u8 sta_id) { int ret = iwl_mvm_rm_sta_common(mvm, sta_id); lockdep_assert_held(&mvm->mutex); RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta_id], NULL); return ret; } static int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta, u32 qmask, enum nl80211_iftype iftype) { if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { sta->sta_id = iwl_mvm_find_free_sta_id(mvm, iftype); if (WARN_ON_ONCE(sta->sta_id == IWL_MVM_STATION_COUNT)) return -ENOSPC; } sta->tfd_queue_msk = qmask; /* put a non-NULL value so iterating over the stations won't stop */ rcu_assign_pointer(mvm->fw_id_to_mac_id[sta->sta_id], ERR_PTR(-EINVAL)); return 0; } static void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) { RCU_INIT_POINTER(mvm->fw_id_to_mac_id[sta->sta_id], NULL); memset(sta, 0, sizeof(struct iwl_mvm_int_sta)); sta->sta_id = IWL_MVM_STATION_COUNT; } static int iwl_mvm_add_int_sta_common(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta, const u8 *addr, u16 mac_id, u16 color) { struct iwl_mvm_add_sta_cmd cmd; int ret; u32 status; lockdep_assert_held(&mvm->mutex); memset(&cmd, 0, sizeof(cmd)); cmd.sta_id = sta->sta_id; cmd.mac_id_n_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mac_id, color)); cmd.tfd_queue_msk = cpu_to_le32(sta->tfd_queue_msk); if (addr) memcpy(cmd.addr, addr, ETH_ALEN); ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), &cmd, &status); if (ret) return ret; switch (status) { case ADD_STA_SUCCESS: IWL_DEBUG_INFO(mvm, "Internal station added.\n"); return 0; default: ret = -EIO; IWL_ERR(mvm, "Add internal station failed, status=0x%x\n", status); break; } return ret; } int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm) { int ret; lockdep_assert_held(&mvm->mutex); /* Map Aux queue to fifo - needs to happen before adding Aux station */ iwl_mvm_enable_ac_txq(mvm, mvm->aux_queue, IWL_MVM_TX_FIFO_MCAST); /* Allocate aux station and assign to it the aux queue */ ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, BIT(mvm->aux_queue), NL80211_IFTYPE_UNSPECIFIED); if (ret) return ret; ret = iwl_mvm_add_int_sta_common(mvm, &mvm->aux_sta, NULL, MAC_INDEX_AUX, 0); if (ret) iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); return ret; } void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm) { lockdep_assert_held(&mvm->mutex); iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta); } /* * Send the add station command for the vif's broadcast station. * Assumes that the station was already allocated. * * @mvm: the mvm component * @vif: the interface to which the broadcast station is added * @bsta: the broadcast station to add. */ int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; static const u8 _baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; const u8 *baddr = _baddr; lockdep_assert_held(&mvm->mutex); if (vif->type == NL80211_IFTYPE_ADHOC) baddr = vif->bss_conf.bssid; if (WARN_ON_ONCE(bsta->sta_id == IWL_MVM_STATION_COUNT)) return -ENOSPC; return iwl_mvm_add_int_sta_common(mvm, bsta, baddr, mvmvif->id, mvmvif->color); } /* Send the FW a request to remove the station from it's internal data * structures, but DO NOT remove the entry from the local data structures. */ int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); int ret; lockdep_assert_held(&mvm->mutex); ret = iwl_mvm_rm_sta_common(mvm, mvmvif->bcast_sta.sta_id); if (ret) IWL_WARN(mvm, "Failed sending remove station\n"); return ret; } int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); u32 qmask; lockdep_assert_held(&mvm->mutex); qmask = iwl_mvm_mac_get_queues_mask(vif); /* * The firmware defines the TFD queue mask to only be relevant * for *unicast* queues, so the multicast (CAB) queue shouldn't * be included. */ if (vif->type == NL80211_IFTYPE_AP) qmask &= ~BIT(vif->cab_queue); return iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta, qmask, ieee80211_vif_type_p2p(vif)); } /* Allocate a new station entry for the broadcast station to the given vif, * and send it to the FW. * Note that each P2P mac should have its own broadcast station. * * @mvm: the mvm component * @vif: the interface to which the broadcast station is added * @bsta: the broadcast station to add. */ int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_int_sta *bsta = &mvmvif->bcast_sta; int ret; lockdep_assert_held(&mvm->mutex); ret = iwl_mvm_alloc_bcast_sta(mvm, vif); if (ret) return ret; ret = iwl_mvm_send_add_bcast_sta(mvm, vif); if (ret) iwl_mvm_dealloc_int_sta(mvm, bsta); return ret; } void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta); } /* * Send the FW a request to remove the station from it's internal data * structures, and in addition remove it from the local data structure. */ int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { int ret; lockdep_assert_held(&mvm->mutex); ret = iwl_mvm_send_rm_bcast_sta(mvm, vif); iwl_mvm_dealloc_bcast_sta(mvm, vif); return ret; } #define IWL_MAX_RX_BA_SESSIONS 16 int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, int tid, u16 ssn, bool start) { struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_add_sta_cmd cmd = {}; int ret; u32 status; lockdep_assert_held(&mvm->mutex); if (start && mvm->rx_ba_sessions >= IWL_MAX_RX_BA_SESSIONS) { IWL_WARN(mvm, "Not enough RX BA SESSIONS\n"); return -ENOSPC; } cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); cmd.sta_id = mvm_sta->sta_id; cmd.add_modify = STA_MODE_MODIFY; if (start) { cmd.add_immediate_ba_tid = (u8) tid; cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); } else { cmd.remove_immediate_ba_tid = (u8) tid; } cmd.modify_mask = start ? STA_MODIFY_ADD_BA_TID : STA_MODIFY_REMOVE_BA_TID; status = ADD_STA_SUCCESS; ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), &cmd, &status); if (ret) return ret; switch (status) { case ADD_STA_SUCCESS: IWL_DEBUG_INFO(mvm, "RX BA Session %sed in fw\n", start ? "start" : "stopp"); break; case ADD_STA_IMMEDIATE_BA_FAILURE: IWL_WARN(mvm, "RX BA Session refused by fw\n"); ret = -ENOSPC; break; default: ret = -EIO; IWL_ERR(mvm, "RX BA Session failed %sing, status 0x%x\n", start ? "start" : "stopp", status); break; } if (!ret) { if (start) mvm->rx_ba_sessions++; else if (mvm->rx_ba_sessions > 0) /* check that restart flow didn't zero the counter */ mvm->rx_ba_sessions--; } return ret; } static int iwl_mvm_sta_tx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, int tid, u8 queue, bool start) { struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_add_sta_cmd cmd = {}; int ret; u32 status; lockdep_assert_held(&mvm->mutex); if (start) { mvm_sta->tfd_queue_msk |= BIT(queue); mvm_sta->tid_disable_agg &= ~BIT(tid); } else { mvm_sta->tfd_queue_msk &= ~BIT(queue); mvm_sta->tid_disable_agg |= BIT(tid); } cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); cmd.sta_id = mvm_sta->sta_id; cmd.add_modify = STA_MODE_MODIFY; cmd.modify_mask = STA_MODIFY_QUEUES | STA_MODIFY_TID_DISABLE_TX; cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); cmd.tid_disable_tx = cpu_to_le16(mvm_sta->tid_disable_agg); status = ADD_STA_SUCCESS; ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), &cmd, &status); if (ret) return ret; switch (status) { case ADD_STA_SUCCESS: break; default: ret = -EIO; IWL_ERR(mvm, "TX BA Session failed %sing, status 0x%x\n", start ? "start" : "stopp", status); break; } return ret; } const u8 tid_to_mac80211_ac[] = { IEEE80211_AC_BE, IEEE80211_AC_BK, IEEE80211_AC_BK, IEEE80211_AC_BE, IEEE80211_AC_VI, IEEE80211_AC_VI, IEEE80211_AC_VO, IEEE80211_AC_VO, }; static const u8 tid_to_ucode_ac[] = { AC_BE, AC_BK, AC_BK, AC_BE, AC_VI, AC_VI, AC_VO, AC_VO, }; int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u16 tid, u16 *ssn) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_tid_data *tid_data; int txq_id; if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) return -EINVAL; if (mvmsta->tid_data[tid].state != IWL_AGG_OFF) { IWL_ERR(mvm, "Start AGG when state is not IWL_AGG_OFF %d!\n", mvmsta->tid_data[tid].state); return -ENXIO; } lockdep_assert_held(&mvm->mutex); for (txq_id = mvm->first_agg_queue; txq_id <= mvm->last_agg_queue; txq_id++) if (mvm->queue_to_mac80211[txq_id] == IWL_INVALID_MAC80211_QUEUE) break; if (txq_id > mvm->last_agg_queue) { IWL_ERR(mvm, "Failed to allocate agg queue\n"); return -EIO; } spin_lock_bh(&mvmsta->lock); /* possible race condition - we entered D0i3 while starting agg */ if (test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) { spin_unlock_bh(&mvmsta->lock); IWL_ERR(mvm, "Entered D0i3 while starting Tx agg\n"); return -EIO; } /* the new tx queue is still connected to the same mac80211 queue */ mvm->queue_to_mac80211[txq_id] = vif->hw_queue[tid_to_mac80211_ac[tid]]; tid_data = &mvmsta->tid_data[tid]; tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); tid_data->txq_id = txq_id; *ssn = tid_data->ssn; IWL_DEBUG_TX_QUEUES(mvm, "Start AGG: sta %d tid %d queue %d - ssn = %d, next_recl = %d\n", mvmsta->sta_id, tid, txq_id, tid_data->ssn, tid_data->next_reclaimed); if (tid_data->ssn == tid_data->next_reclaimed) { tid_data->state = IWL_AGG_STARTING; ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); } else { tid_data->state = IWL_EMPTYING_HW_QUEUE_ADDBA; } spin_unlock_bh(&mvmsta->lock); return 0; } int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u16 tid, u8 buf_size) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; int queue, fifo, ret; u16 ssn; BUILD_BUG_ON((sizeof(mvmsta->agg_tids) * BITS_PER_BYTE) != IWL_MAX_TID_COUNT); buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF); spin_lock_bh(&mvmsta->lock); ssn = tid_data->ssn; queue = tid_data->txq_id; tid_data->state = IWL_AGG_ON; mvmsta->agg_tids |= BIT(tid); tid_data->ssn = 0xffff; spin_unlock_bh(&mvmsta->lock); fifo = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); if (ret) return -EIO; iwl_mvm_enable_agg_txq(mvm, queue, fifo, mvmsta->sta_id, tid, buf_size, ssn); /* * Even though in theory the peer could have different * aggregation reorder buffer sizes for different sessions, * our ucode doesn't allow for that and has a global limit * for each station. Therefore, use the minimum of all the * aggregation sessions and our default value. */ mvmsta->max_agg_bufsize = min(mvmsta->max_agg_bufsize, buf_size); mvmsta->lq_sta.lq.agg_frame_cnt_limit = mvmsta->max_agg_bufsize; IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", sta->addr, tid); return iwl_mvm_send_lq_cmd(mvm, &mvmsta->lq_sta.lq, false); } int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u16 tid) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; u16 txq_id; int err; /* * If mac80211 is cleaning its state, then say that we finished since * our state has been cleared anyway. */ if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); return 0; } spin_lock_bh(&mvmsta->lock); txq_id = tid_data->txq_id; IWL_DEBUG_TX_QUEUES(mvm, "Stop AGG: sta %d tid %d q %d state %d\n", mvmsta->sta_id, tid, txq_id, tid_data->state); mvmsta->agg_tids &= ~BIT(tid); switch (tid_data->state) { case IWL_AGG_ON: tid_data->ssn = IEEE80211_SEQ_TO_SN(tid_data->seq_number); IWL_DEBUG_TX_QUEUES(mvm, "ssn = %d, next_recl = %d\n", tid_data->ssn, tid_data->next_reclaimed); /* There are still packets for this RA / TID in the HW */ if (tid_data->ssn != tid_data->next_reclaimed) { tid_data->state = IWL_EMPTYING_HW_QUEUE_DELBA; err = 0; break; } tid_data->ssn = 0xffff; tid_data->state = IWL_AGG_OFF; mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE; spin_unlock_bh(&mvmsta->lock); ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); iwl_mvm_disable_txq(mvm, txq_id, 0); return 0; case IWL_AGG_STARTING: case IWL_EMPTYING_HW_QUEUE_ADDBA: /* * The agg session has been stopped before it was set up. This * can happen when the AddBA timer times out for example. */ /* No barriers since we are under mutex */ lockdep_assert_held(&mvm->mutex); mvm->queue_to_mac80211[txq_id] = IWL_INVALID_MAC80211_QUEUE; ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); tid_data->state = IWL_AGG_OFF; err = 0; break; default: IWL_ERR(mvm, "Stopping AGG while state not ON or starting for %d on %d (%d)\n", mvmsta->sta_id, tid, tid_data->state); IWL_ERR(mvm, "\ttid_data->txq_id = %d\n", tid_data->txq_id); err = -EINVAL; } spin_unlock_bh(&mvmsta->lock); return err; } int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, u16 tid) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; u16 txq_id; enum iwl_mvm_agg_state old_state; /* * First set the agg state to OFF to avoid calling * ieee80211_stop_tx_ba_cb in iwl_mvm_check_ratid_empty. */ spin_lock_bh(&mvmsta->lock); txq_id = tid_data->txq_id; IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", mvmsta->sta_id, tid, txq_id, tid_data->state); old_state = tid_data->state; tid_data->state = IWL_AGG_OFF; mvmsta->agg_tids &= ~BIT(tid); spin_unlock_bh(&mvmsta->lock); if (old_state >= IWL_AGG_ON) { if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true)) IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); iwl_mvm_sta_tx_agg(mvm, sta, tid, txq_id, false); iwl_mvm_disable_txq(mvm, tid_data->txq_id, 0); } mvm->queue_to_mac80211[tid_data->txq_id] = IWL_INVALID_MAC80211_QUEUE; return 0; } static int iwl_mvm_set_fw_key_idx(struct iwl_mvm *mvm) { int i; lockdep_assert_held(&mvm->mutex); i = find_first_zero_bit(mvm->fw_key_table, STA_KEY_MAX_NUM); if (i == STA_KEY_MAX_NUM) return STA_KEY_IDX_INVALID; __set_bit(i, mvm->fw_key_table); return i; } static u8 iwl_mvm_get_key_sta_id(struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); if (sta) { struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); return mvm_sta->sta_id; } /* * The device expects GTKs for station interfaces to be * installed as GTKs for the AP station. If we have no * station ID, then use AP's station ID. */ if (vif->type == NL80211_IFTYPE_STATION && mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) return mvmvif->ap_sta_id; return IWL_MVM_STATION_COUNT; } static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvm_sta, struct ieee80211_key_conf *keyconf, bool mcast, u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags) { struct iwl_mvm_add_sta_key_cmd cmd = {}; __le16 key_flags; int ret; u32 status; u16 keyidx; int i; u8 sta_id = mvm_sta->sta_id; keyidx = (keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & STA_KEY_FLG_KEYID_MSK; key_flags = cpu_to_le16(keyidx); key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_KEY_MAP); switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_TKIP: key_flags |= cpu_to_le16(STA_KEY_FLG_TKIP); cmd.tkip_rx_tsc_byte2 = tkip_iv32; for (i = 0; i < 5; i++) cmd.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); memcpy(cmd.key, keyconf->key, keyconf->keylen); break; case WLAN_CIPHER_SUITE_CCMP: key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); memcpy(cmd.key, keyconf->key, keyconf->keylen); break; case WLAN_CIPHER_SUITE_WEP104: key_flags |= cpu_to_le16(STA_KEY_FLG_WEP_13BYTES); /* fall through */ case WLAN_CIPHER_SUITE_WEP40: key_flags |= cpu_to_le16(STA_KEY_FLG_WEP); memcpy(cmd.key + 3, keyconf->key, keyconf->keylen); break; default: key_flags |= cpu_to_le16(STA_KEY_FLG_EXT); memcpy(cmd.key, keyconf->key, keyconf->keylen); } if (mcast) key_flags |= cpu_to_le16(STA_KEY_MULTICAST); cmd.key_offset = keyconf->hw_key_idx; cmd.key_flags = key_flags; cmd.sta_id = sta_id; status = ADD_STA_SUCCESS; if (cmd_flags & CMD_ASYNC) ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA_KEY, CMD_ASYNC, sizeof(cmd), &cmd); else ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), &cmd, &status); switch (status) { case ADD_STA_SUCCESS: IWL_DEBUG_WEP(mvm, "MODIFY_STA: set dynamic key passed\n"); break; default: ret = -EIO; IWL_ERR(mvm, "MODIFY_STA: set dynamic key failed\n"); break; } return ret; } static int iwl_mvm_send_sta_igtk(struct iwl_mvm *mvm, struct ieee80211_key_conf *keyconf, u8 sta_id, bool remove_key) { struct iwl_mvm_mgmt_mcast_key_cmd igtk_cmd = {}; /* verify the key details match the required command's expectations */ if (WARN_ON((keyconf->cipher != WLAN_CIPHER_SUITE_AES_CMAC) || (keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE) || (keyconf->keyidx != 4 && keyconf->keyidx != 5))) return -EINVAL; igtk_cmd.key_id = cpu_to_le32(keyconf->keyidx); igtk_cmd.sta_id = cpu_to_le32(sta_id); if (remove_key) { igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID); } else { struct ieee80211_key_seq seq; const u8 *pn; memcpy(igtk_cmd.IGTK, keyconf->key, keyconf->keylen); ieee80211_aes_cmac_calculate_k1_k2(keyconf, igtk_cmd.K1, igtk_cmd.K2); ieee80211_get_key_rx_seq(keyconf, 0, &seq); pn = seq.aes_cmac.pn; igtk_cmd.receive_seq_cnt = cpu_to_le64(((u64) pn[5] << 0) | ((u64) pn[4] << 8) | ((u64) pn[3] << 16) | ((u64) pn[2] << 24) | ((u64) pn[1] << 32) | ((u64) pn[0] << 40)); } IWL_DEBUG_INFO(mvm, "%s igtk for sta %u\n", remove_key ? "removing" : "installing", igtk_cmd.sta_id); return iwl_mvm_send_cmd_pdu(mvm, MGMT_MCAST_KEY, 0, sizeof(igtk_cmd), &igtk_cmd); } static inline u8 *iwl_mvm_get_mac_addr(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); if (sta) return sta->addr; if (vif->type == NL80211_IFTYPE_STATION && mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) { u8 sta_id = mvmvif->ap_sta_id; sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex)); return sta->addr; } return NULL; } static int __iwl_mvm_set_sta_key(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *keyconf, bool mcast) { struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); int ret; const u8 *addr; struct ieee80211_key_seq seq; u16 p1k[5]; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_TKIP: addr = iwl_mvm_get_mac_addr(mvm, vif, sta); /* get phase 1 key from mac80211 */ ieee80211_get_key_rx_seq(keyconf, 0, &seq); ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, seq.tkip.iv32, p1k, 0); break; case WLAN_CIPHER_SUITE_CCMP: case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 0, NULL, 0); break; default: ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, 0, NULL, 0); } return ret; } static int __iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, u8 sta_id, struct ieee80211_key_conf *keyconf, bool mcast) { struct iwl_mvm_add_sta_key_cmd cmd = {}; __le16 key_flags; int ret; u32 status; key_flags = cpu_to_le16((keyconf->keyidx << STA_KEY_FLG_KEYID_POS) & STA_KEY_FLG_KEYID_MSK); key_flags |= cpu_to_le16(STA_KEY_FLG_NO_ENC | STA_KEY_FLG_WEP_KEY_MAP); key_flags |= cpu_to_le16(STA_KEY_NOT_VALID); if (mcast) key_flags |= cpu_to_le16(STA_KEY_MULTICAST); cmd.key_flags = key_flags; cmd.key_offset = keyconf->hw_key_idx; cmd.sta_id = sta_id; status = ADD_STA_SUCCESS; ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA_KEY, sizeof(cmd), &cmd, &status); switch (status) { case ADD_STA_SUCCESS: IWL_DEBUG_WEP(mvm, "MODIFY_STA: remove sta key passed\n"); break; default: ret = -EIO; IWL_ERR(mvm, "MODIFY_STA: remove sta key failed\n"); break; } return ret; } int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *keyconf, bool have_key_offset) { bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); u8 sta_id; int ret; lockdep_assert_held(&mvm->mutex); /* Get the station id from the mvm local station table */ sta_id = iwl_mvm_get_key_sta_id(vif, sta); if (sta_id == IWL_MVM_STATION_COUNT) { IWL_ERR(mvm, "Failed to find station id\n"); return -EINVAL; } if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) { ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false); goto end; } /* * It is possible that the 'sta' parameter is NULL, and thus * there is a need to retrieve the sta from the local station table. */ if (!sta) { sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex)); if (IS_ERR_OR_NULL(sta)) { IWL_ERR(mvm, "Invalid station id\n"); return -EINVAL; } } if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) return -EINVAL; if (!have_key_offset) { /* * The D3 firmware hardcodes the PTK offset to 0, so we have to * configure it there. As a result, this workaround exists to * let the caller set the key offset (hw_key_idx), see d3.c. */ keyconf->hw_key_idx = iwl_mvm_set_fw_key_idx(mvm); if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID) return -ENOSPC; } ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, mcast); if (ret) { __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); goto end; } /* * For WEP, the same key is used for multicast and unicast. Upload it * again, using the same key offset, and now pointing the other one * to the same key slot (offset). * If this fails, remove the original as well. */ if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) { ret = __iwl_mvm_set_sta_key(mvm, vif, sta, keyconf, !mcast); if (ret) { __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); } } end: IWL_DEBUG_WEP(mvm, "key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta->addr, ret); return ret; } int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *keyconf) { bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); u8 sta_id; int ret; lockdep_assert_held(&mvm->mutex); /* Get the station id from the mvm local station table */ sta_id = iwl_mvm_get_key_sta_id(vif, sta); IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id); if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC) return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true); if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) { IWL_ERR(mvm, "offset %d not used in fw key table.\n", keyconf->hw_key_idx); return -ENOENT; } if (sta_id == IWL_MVM_STATION_COUNT) { IWL_DEBUG_WEP(mvm, "station non-existent, early return.\n"); return 0; } /* * It is possible that the 'sta' parameter is NULL, and thus * there is a need to retrieve the sta from the local station table, * for example when a GTK is removed (where the sta_id will then be * the AP ID, and no station was passed by mac80211.) */ if (!sta) { sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex)); if (!sta) { IWL_ERR(mvm, "Invalid station id\n"); return -EINVAL; } } if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif)) return -EINVAL; ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, mcast); if (ret) return ret; /* delete WEP key twice to get rid of (now useless) offset */ if (keyconf->cipher == WLAN_CIPHER_SUITE_WEP40 || keyconf->cipher == WLAN_CIPHER_SUITE_WEP104) ret = __iwl_mvm_remove_sta_key(mvm, sta_id, keyconf, !mcast); return ret; } void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_key_conf *keyconf, struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) { struct iwl_mvm_sta *mvm_sta; u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta); bool mcast = !(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE); if (WARN_ON_ONCE(sta_id == IWL_MVM_STATION_COUNT)) return; rcu_read_lock(); if (!sta) { sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); if (WARN_ON(IS_ERR_OR_NULL(sta))) { rcu_read_unlock(); return; } } mvm_sta = iwl_mvm_sta_from_mac80211(sta); iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, mcast, iv32, phase1key, CMD_ASYNC); rcu_read_unlock(); } void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, struct ieee80211_sta *sta) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_add_sta_cmd cmd = { .add_modify = STA_MODE_MODIFY, .sta_id = mvmsta->sta_id, .station_flags_msk = cpu_to_le32(STA_FLG_PS), .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), }; int ret; ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); if (ret) IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); } void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, struct ieee80211_sta *sta, enum ieee80211_frame_release_type reason, u16 cnt, u16 tids, bool more_data, bool agg) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_add_sta_cmd cmd = { .add_modify = STA_MODE_MODIFY, .sta_id = mvmsta->sta_id, .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, .sleep_tx_count = cpu_to_le16(cnt), .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), }; int tid, ret; unsigned long _tids = tids; /* convert TIDs to ACs - we don't support TSPEC so that's OK * Note that this field is reserved and unused by firmware not * supporting GO uAPSD, so it's safe to always do this. */ for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); /* If we're releasing frames from aggregation queues then check if the * all queues combined that we're releasing frames from have * - more frames than the service period, in which case more_data * needs to be set * - fewer than 'cnt' frames, in which case we need to adjust the * firmware command (but do that unconditionally) */ if (agg) { int remaining = cnt; spin_lock_bh(&mvmsta->lock); for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) { struct iwl_mvm_tid_data *tid_data; u16 n_queued; tid_data = &mvmsta->tid_data[tid]; if (WARN(tid_data->state != IWL_AGG_ON && tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, "TID %d state is %d\n", tid, tid_data->state)) { spin_unlock_bh(&mvmsta->lock); ieee80211_sta_eosp(sta); return; } n_queued = iwl_mvm_tid_queued(tid_data); if (n_queued > remaining) { more_data = true; remaining = 0; break; } remaining -= n_queued; } spin_unlock_bh(&mvmsta->lock); cmd.sleep_tx_count = cpu_to_le16(cnt - remaining); if (WARN_ON(cnt - remaining == 0)) { ieee80211_sta_eosp(sta); return; } } /* Note: this is ignored by firmware not supporting GO uAPSD */ if (more_data) cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_MOREDATA); if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) { mvmsta->next_status_eosp = true; cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_PS_POLL); } else { cmd.sleep_state_flags |= cpu_to_le16(STA_SLEEP_STATE_UAPSD); } ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); if (ret) IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); } int iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { struct iwl_rx_packet *pkt = rxb_addr(rxb); struct iwl_mvm_eosp_notification *notif = (void *)pkt->data; struct ieee80211_sta *sta; u32 sta_id = le32_to_cpu(notif->sta_id); if (WARN_ON_ONCE(sta_id >= IWL_MVM_STATION_COUNT)) return 0; rcu_read_lock(); sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); if (!IS_ERR_OR_NULL(sta)) ieee80211_sta_eosp(sta); rcu_read_unlock(); return 0; } void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, bool disable) { struct iwl_mvm_add_sta_cmd cmd = { .add_modify = STA_MODE_MODIFY, .sta_id = mvmsta->sta_id, .station_flags = disable ? cpu_to_le32(STA_FLG_DISABLE_TX) : 0, .station_flags_msk = cpu_to_le32(STA_FLG_DISABLE_TX), .mac_id_n_color = cpu_to_le32(mvmsta->mac_id_n_color), }; int ret; if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_DISABLE_STA_TX)) return; ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); if (ret) IWL_ERR(mvm, "Failed to send ADD_STA command (%d)\n", ret); } void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, struct ieee80211_sta *sta, bool disable) { struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); spin_lock_bh(&mvm_sta->lock); if (mvm_sta->disable_tx == disable) { spin_unlock_bh(&mvm_sta->lock); return; } mvm_sta->disable_tx = disable; /* * Tell mac80211 to start/stop queueing tx for this station, * but don't stop queueing if there are still pending frames * for this station. */ if (disable || !atomic_read(&mvm->pending_frames[mvm_sta->sta_id])) ieee80211_sta_block_awake(mvm->hw, sta, disable); iwl_mvm_sta_modify_disable_tx(mvm, mvm_sta, disable); spin_unlock_bh(&mvm_sta->lock); } void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, struct iwl_mvm_vif *mvmvif, bool disable) { struct ieee80211_sta *sta; struct iwl_mvm_sta *mvm_sta; int i; lockdep_assert_held(&mvm->mutex); /* Block/unblock all the stations of the given mvmvif */ for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], lockdep_is_held(&mvm->mutex)); if (IS_ERR_OR_NULL(sta)) continue; mvm_sta = iwl_mvm_sta_from_mac80211(sta); if (mvm_sta->mac_id_n_color != FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)) continue; iwl_mvm_sta_modify_disable_tx_ap(mvm, sta, disable); } } void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_sta *mvmsta; rcu_read_lock(); mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, mvmvif->ap_sta_id); if (!WARN_ON(!mvmsta)) iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true); rcu_read_unlock(); }