| /****************************************************************************** |
| * |
| * 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 COPYING. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * 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 <net/mac80211.h> |
| |
| #include "mvm.h" |
| #include "sta.h" |
| #include "rs.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; |
| } |
| |
| /* 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 = (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); |
| 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); |
| } |
| add_sta_cmd.add_modify = update ? 1 : 0; |
| |
| add_sta_cmd.station_flags_msk |= cpu_to_le32(STA_FLG_FAT_EN_MSK | |
| STA_FLG_MIMO_EN_MSK); |
| |
| 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; |
| } |
| |
| 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; |
| 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; |
| 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 - need to reset the seq_number etc... */ |
| memset(mvm_sta->tid_data, 0, sizeof(mvm_sta->tid_data)); |
| |
| ret = iwl_mvm_sta_send_to_fw(mvm, sta, false); |
| 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_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, 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) { |
| /* flush its queues here since we are freeing mvm_sta */ |
| ret = iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, true); |
| |
| /* |
| * 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)); |
| |
| /* 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; |
| } |
| |
| /* |
| * 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); |
| ret = iwl_mvm_drain_sta(mvm, mvm_sta, true); |
| } else { |
| spin_unlock_bh(&mvm_sta->lock); |
| 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 = 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 = (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; |
| |
| IWL_DEBUG_HT(mvm, "Tx aggregation enabled on ra = %pM tid = %d\n", |
| sta->addr, tid); |
| |
| if (mvm->cfg->ht_params->use_rts_for_aggregation) { |
| /* |
| * switch to RTS/CTS if it is the prefer protection |
| * method for HT traffic |
| * this function also sends the LQ command |
| */ |
| return iwl_mvm_tx_protection(mvm, mvmsta, true); |
| /* |
| * TODO: remove the TLC_RTS flag when we tear down the last |
| * AGG session (agg_tids_count in DVM) |
| */ |
| } |
| |
| 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; |
| |
| |
| /* |
| * 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); |
| |
| 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; |
| 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; |
| } |
| |
| 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 = (void *)sta->drv_priv; |
| struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
| u16 txq_id; |
| |
| /* |
| * 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); |
| tid_data->state = IWL_AGG_OFF; |
| spin_unlock_bh(&mvmsta->lock); |
| |
| if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true)) |
| IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); |
| |
| iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); |
| 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 = (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_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, |
| 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_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; |
| } |
| } |
| |
| 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_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; |
| } |
| } |
| |
| 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_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 (!(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; |
| u8 sta_id = iwl_mvm_get_key_sta_id(vif, sta); |
| |
| 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 = (void *)sta->drv_priv; |
| iwl_mvm_send_sta_key(mvm, mvm_sta, keyconf, sta_id, |
| 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 = (void *)sta->drv_priv; |
| 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 sleep_state_flags = |
| (reason == IEEE80211_FRAME_RELEASE_UAPSD) ? |
| STA_SLEEP_STATE_UAPSD : STA_SLEEP_STATE_PS_POLL; |
| struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; |
| 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), |
| /* |
| * 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); |
| } |