/****************************************************************************** * * 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 - 2013 Intel Corporation. All rights reserved. * * 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 LICENSE.GPL. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved. * 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" static int iwl_mvm_find_free_sta_id(struct iwl_mvm *mvm) { int sta_id; WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); lockdep_assert_held(&mvm->mutex); /* 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 (!rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id], lockdep_is_held(&mvm->mutex))) return sta_id; return IWL_MVM_STATION_COUNT; } /* add a NEW station to fw */ int iwl_mvm_sta_add_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta) { struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; struct iwl_mvm_add_sta_cmd add_sta_cmd; int ret; u32 status; u32 agg_size = 0, mpdu_dens = 0; memset(&add_sta_cmd, 0, sizeof(add_sta_cmd)); add_sta_cmd.sta_id = mvm_sta->sta_id; add_sta_cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); add_sta_cmd.tfd_queue_msk = cpu_to_le32(mvm_sta->tfd_queue_msk); memcpy(&add_sta_cmd.addr, sta->addr, ETH_ALEN); /* STA_FLG_FAT_EN_MSK ? */ /* STA_FLG_MIMO_EN_MSK ? */ 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; } 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 = (void *)sta->drv_priv; 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); 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; /* HW restart, don't assume the memory has been zeroed */ atomic_set(&mvm_sta->pending_frames, 0); mvm_sta->tid_disable_agg = 0; mvm_sta->tfd_queue_msk = 0; 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]); if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE) mvm_sta->tfd_queue_msk |= BIT(vif->cab_queue); /* for HW restart - need to reset the seq_number etc... */ memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data)); ret = iwl_mvm_sta_add_to_fw(mvm, sta); if (ret) return ret; /* The first station added is the AP, the others are TDLS STAs */ if (vif->type == NL80211_IFTYPE_STATION && mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) mvmvif->ap_sta_id = sta_id; rcu_assign_pointer(mvm->fw_id_to_mac_id[sta_id], sta); return 0; } 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, CMD_SYNC, 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 */ if (!IS_ERR(sta)) 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_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL); clear_bit(sta_id, mvm->sta_drained); } 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 = (void *)sta->drv_priv; int ret; lockdep_assert_held(&mvm->mutex); if (vif->type == NL80211_IFTYPE_STATION && mvmvif->ap_sta_id == mvm_sta->sta_id) { /* * Put a non-NULL since the fw station isn't removed. * It will be removed after the MAC will be set as * unassoc. */ rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], ERR_PTR(-EINVAL)); /* 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; } /* * 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_sta->pending_frames)) { ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], ERR_PTR(-EBUSY)); } else { ret = iwl_mvm_rm_sta_common(mvm, mvm_sta->sta_id); rcu_assign_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_assign_pointer(mvm->fw_id_to_mac_id[sta_id], NULL); return ret; } int iwl_mvm_allocate_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta, u32 qmask) { if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { sta->sta_id = iwl_mvm_find_free_sta_id(mvm); 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; } void iwl_mvm_dealloc_int_sta(struct iwl_mvm *mvm, struct iwl_mvm_int_sta *sta) { rcu_assign_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(struct iwl_mvm_add_sta_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); /* Add the aux station, but without any queues */ ret = iwl_mvm_allocate_int_sta(mvm, &mvm->aux_sta, 0); 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; } /* * 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_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mvm_int_sta *bsta) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; lockdep_assert_held(&mvm->mutex); 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 iwl_mvm_int_sta *bsta) { int ret; lockdep_assert_held(&mvm->mutex); ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id); if (ret) IWL_WARN(mvm, "Failed sending remove station\n"); return ret; } /* 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_int_sta *bsta) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); static const u8 baddr[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; u32 qmask; int ret; lockdep_assert_held(&mvm->mutex); qmask = iwl_mvm_mac_get_queues_mask(mvm, vif); ret = iwl_mvm_allocate_int_sta(mvm, bsta, qmask); if (ret) return ret; ret = iwl_mvm_add_int_sta_common(mvm, bsta, baddr, mvmvif->id, mvmvif->color); if (ret) iwl_mvm_dealloc_int_sta(mvm, bsta); return ret; } /* * 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 iwl_mvm_int_sta *bsta) { int ret; lockdep_assert_held(&mvm->mutex); ret = iwl_mvm_rm_sta_common(mvm, bsta->sta_id); if (ret) return ret; iwl_mvm_dealloc_int_sta(mvm, bsta); return ret; } 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 = (void *)sta->drv_priv; struct iwl_mvm_add_sta_cmd cmd = {}; int ret; u32 status; lockdep_assert_held(&mvm->mutex); 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.add_immediate_ba_tid = (u8) tid; cmd.add_immediate_ba_ssn = cpu_to_le16(ssn); 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; } 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 = (void *)sta->drv_priv; 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; } static const u8 tid_to_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, }; 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 = (void *)sta->drv_priv; 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 = IWL_MVM_FIRST_AGG_QUEUE; txq_id <= IWL_MVM_LAST_AGG_QUEUE; txq_id++) if (mvm->queue_to_mac80211[txq_id] == IWL_INVALID_MAC80211_QUEUE) break; if (txq_id > IWL_MVM_LAST_AGG_QUEUE) { IWL_ERR(mvm, "Failed to allocate agg queue\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_ac[tid]]; spin_lock_bh(&mvmsta->lock); tid_data = &mvmsta->tid_data[tid]; tid_data->ssn = 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 = (void *)sta->drv_priv; struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; int queue, fifo, ret; u16 ssn; 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; tid_data->ssn = 0xffff; spin_unlock_bh(&mvmsta->lock); fifo = iwl_mvm_ac_to_tx_fifo[tid_to_ac[tid]]; ret = iwl_mvm_sta_tx_agg(mvm, sta, tid, queue, true); if (ret) return -EIO; iwl_trans_txq_enable(mvm->trans, 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; if (mvm->cfg->ht_params->use_rts_for_aggregation) { /* * switch to RTS/CTS if it is the prefer protection * method for HT traffic */ mvmsta->lq_sta.lq.flags |= LQ_FLAG_SET_STA_TLC_RTS_MSK; /* * TODO: remove the TLC_RTS flag when we tear down the last * AGG session (agg_tids_count in DVM) */ } 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, CMD_ASYNC, 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 = (void *)sta->drv_priv; struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; u16 txq_id; int err; 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); switch (tid_data->state) { case IWL_AGG_ON: tid_data->ssn = 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; iwl_trans_txq_disable(mvm->trans, txq_id); /* fall through */ 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; } 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 = (void *)vif->drv_priv; if (sta) { struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv; 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_INVALID_STATION; } static int iwl_mvm_send_sta_key(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvm_sta, struct ieee80211_key_conf *keyconf, u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags) { __le16 key_flags; struct iwl_mvm_add_sta_cmd cmd = {}; int ret, status; u16 keyidx; int i; 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.key.tkip_rx_tsc_byte2 = tkip_iv32; for (i = 0; i < 5; i++) cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); memcpy(cmd.key.key, keyconf->key, keyconf->keylen); break; case WLAN_CIPHER_SUITE_CCMP: key_flags |= cpu_to_le16(STA_KEY_FLG_CCM); memcpy(cmd.key.key, keyconf->key, keyconf->keylen); break; default: WARN_ON(1); return -EINVAL; } if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) key_flags |= cpu_to_le16(STA_KEY_MULTICAST); cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); cmd.key.key_offset = keyconf->hw_key_idx; cmd.key.key_flags = key_flags; cmd.add_modify = STA_MODE_MODIFY; cmd.modify_mask = STA_MODIFY_KEY; cmd.sta_id = sta_id; status = ADD_STA_SUCCESS; if (cmd_flags == CMD_SYNC) ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, sizeof(cmd), &cmd, &status); else ret = iwl_mvm_send_cmd_pdu(mvm, ADD_STA, CMD_ASYNC, sizeof(cmd), &cmd); 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, CMD_SYNC, 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 = (void *)vif->drv_priv; 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; } 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) { struct iwl_mvm_sta *mvm_sta; int ret; u8 *addr, sta_id; struct ieee80211_key_seq seq; u16 p1k[5]; 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_INVALID_STATION) { 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; } } mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv; if (WARN_ON_ONCE(mvm_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; } 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, sta_id, seq.tkip.iv32, p1k, CMD_SYNC); break; case WLAN_CIPHER_SUITE_CCMP: ret = iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, 0, NULL, CMD_SYNC); break; default: IWL_ERR(mvm, "Unknown cipher %x\n", keyconf->cipher); ret = -EINVAL; } if (ret) __clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); 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) { struct iwl_mvm_sta *mvm_sta; struct iwl_mvm_add_sta_cmd cmd = {}; __le16 key_flags; int ret, status; u8 sta_id; 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); ret = __test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table); if (!ret) { IWL_ERR(mvm, "offset %d not used in fw key table.\n", keyconf->hw_key_idx); return -ENOENT; } if (sta_id == IWL_INVALID_STATION) { 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; } } mvm_sta = (struct iwl_mvm_sta *)sta->drv_priv; if (WARN_ON_ONCE(mvm_sta->vif != vif)) return -EINVAL; key_flags = cpu_to_le16(keyconf->keyidx & 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 (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) key_flags |= cpu_to_le16(STA_KEY_MULTICAST); cmd.mac_id_n_color = cpu_to_le32(mvm_sta->mac_id_n_color); cmd.key.key_flags = key_flags; cmd.key.key_offset = keyconf->hw_key_idx; cmd.sta_id = sta_id; cmd.modify_mask = STA_MODIFY_KEY; cmd.add_modify = STA_MODE_MODIFY; status = ADD_STA_SUCCESS; ret = iwl_mvm_send_cmd_pdu_status(mvm, ADD_STA, 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; } 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 = (void *)sta->drv_priv; u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta); if (sta_id == IWL_INVALID_STATION) return; iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, iv32, phase1key, CMD_ASYNC); } void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, int sta_id) { struct iwl_mvm_add_sta_cmd cmd = { .add_modify = STA_MODE_MODIFY, .sta_id = sta_id, .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, .sleep_state_flags = cpu_to_le16(STA_SLEEP_STATE_AWAKE), }; int ret; /* * Same modify mask for sleep_tx_count and sleep_state_flags but this * should be fine since if we set the STA as "awake", then * sleep_tx_count is not relevant. */ 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, int sta_id, enum ieee80211_frame_release_type reason, u16 cnt) { u16 sleep_state_flags = (reason == IEEE80211_FRAME_RELEASE_UAPSD) ? STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL; struct iwl_mvm_add_sta_cmd cmd = { .add_modify = STA_MODE_MODIFY, .sta_id = sta_id, .modify_mask = STA_MODIFY_SLEEPING_STA_TX_COUNT, .sleep_tx_count = cpu_to_le16(cnt), /* * Same modify mask for sleep_tx_count and sleep_state_flags so * we must set the sleep_state_flags too. */ .sleep_state_flags = cpu_to_le16(sleep_state_flags), }; int ret; /* TODO: somehow the fw doesn't seem to take PS_POLL into account */ 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); }