/****************************************************************************** * * 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 * 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 #include "iwl-io.h" #include "iwl-prph.h" #include "fw-api.h" #include "mvm.h" const u8 iwl_mvm_ac_to_tx_fifo[] = { IWL_MVM_TX_FIFO_VO, IWL_MVM_TX_FIFO_VI, IWL_MVM_TX_FIFO_BE, IWL_MVM_TX_FIFO_BK, }; struct iwl_mvm_mac_iface_iterator_data { struct iwl_mvm *mvm; struct ieee80211_vif *vif; unsigned long available_mac_ids[BITS_TO_LONGS(NUM_MAC_INDEX_DRIVER)]; unsigned long available_tsf_ids[BITS_TO_LONGS(NUM_TSF_IDS)]; unsigned long used_hw_queues[BITS_TO_LONGS(IWL_MVM_MAX_QUEUES)]; enum iwl_tsf_id preferred_tsf; bool found_vif; }; static void iwl_mvm_mac_iface_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm_mac_iface_iterator_data *data = _data; struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); u32 ac; /* Iterator may already find the interface being added -- skip it */ if (vif == data->vif) { data->found_vif = true; return; } /* Mark the queues used by the vif */ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) __set_bit(vif->hw_queue[ac], data->used_hw_queues); if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE) __set_bit(vif->cab_queue, data->used_hw_queues); /* * Mark MAC IDs as used by clearing the available bit, and * (below) mark TSFs as used if their existing use is not * compatible with the new interface type. * No locking or atomic bit operations are needed since the * data is on the stack of the caller function. */ __clear_bit(mvmvif->id, data->available_mac_ids); /* * The TSF is a hardware/firmware resource, there are 4 and * the driver should assign and free them as needed. However, * there are cases where 2 MACs should share the same TSF ID * for the purpose of clock sync, an optimization to avoid * clock drift causing overlapping TBTTs/DTIMs for a GO and * client in the system. * * The firmware will decide according to the MAC type which * will be the master and slave. Clients that need to sync * with a remote station will be the master, and an AP or GO * will be the slave. * * Depending on the new interface type it can be slaved to * or become the master of an existing interface. */ switch (data->vif->type) { case NL80211_IFTYPE_STATION: /* * The new interface is client, so if the existing one * we're iterating is an AP, the TSF should be used to * avoid drift between the new client and existing AP, * the existing AP will get drift updates from the new * client context in this case */ if (vif->type == NL80211_IFTYPE_AP) { if (data->preferred_tsf == NUM_TSF_IDS && test_bit(mvmvif->tsf_id, data->available_tsf_ids)) data->preferred_tsf = mvmvif->tsf_id; return; } break; case NL80211_IFTYPE_AP: /* * The new interface is AP/GO, so should get drift * updates from an existing client or use the same * TSF as an existing GO. There's no drift between * TSFs internally but if they used different TSFs * then a new client MAC could update one of them * and cause drift that way. */ if (vif->type == NL80211_IFTYPE_STATION || vif->type == NL80211_IFTYPE_AP) { if (data->preferred_tsf == NUM_TSF_IDS && test_bit(mvmvif->tsf_id, data->available_tsf_ids)) data->preferred_tsf = mvmvif->tsf_id; return; } break; default: /* * For all other interface types there's no need to * take drift into account. Either they're exclusive * like IBSS and monitor, or we don't care much about * their TSF (like P2P Device), but we won't be able * to share the TSF resource. */ break; } /* * Unless we exited above, we can't share the TSF resource * that the virtual interface we're iterating over is using * with the new one, so clear the available bit and if this * was the preferred one, reset that as well. */ __clear_bit(mvmvif->tsf_id, data->available_tsf_ids); if (data->preferred_tsf == mvmvif->tsf_id) data->preferred_tsf = NUM_TSF_IDS; } /* * Get the mask of the queus used by the vif */ u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { u32 qmask = 0, ac; if (vif->type == NL80211_IFTYPE_P2P_DEVICE) return BIT(IWL_MVM_OFFCHANNEL_QUEUE); for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) qmask |= BIT(vif->hw_queue[ac]); return qmask; } static int iwl_mvm_mac_ctxt_allocate_resources(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_mac_iface_iterator_data data = { .mvm = mvm, .vif = vif, .available_mac_ids = { (1 << NUM_MAC_INDEX_DRIVER) - 1 }, .available_tsf_ids = { (1 << NUM_TSF_IDS) - 1 }, /* no preference yet */ .preferred_tsf = NUM_TSF_IDS, .used_hw_queues = { BIT(IWL_MVM_OFFCHANNEL_QUEUE) | BIT(mvm->aux_queue) | BIT(IWL_MVM_CMD_QUEUE) }, .found_vif = false, }; u32 ac; int ret, i; /* * Allocate a MAC ID and a TSF for this MAC, along with the queues * and other resources. */ /* * Before the iterator, we start with all MAC IDs and TSFs available. * * During iteration, all MAC IDs are cleared that are in use by other * virtual interfaces, and all TSF IDs are cleared that can't be used * by this new virtual interface because they're used by an interface * that can't share it with the new one. * At the same time, we check if there's a preferred TSF in the case * that we should share it with another interface. */ /* Currently, MAC ID 0 should be used only for the managed/IBSS vif */ switch (vif->type) { case NL80211_IFTYPE_ADHOC: break; case NL80211_IFTYPE_STATION: if (!vif->p2p) break; /* fall through */ default: __clear_bit(0, data.available_mac_ids); } ieee80211_iterate_active_interfaces_atomic( mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, iwl_mvm_mac_iface_iterator, &data); /* * In the case we're getting here during resume, it's similar to * firmware restart, and with RESUME_ALL the iterator will find * the vif being added already. * We don't want to reassign any IDs in either case since doing * so would probably assign different IDs (as interfaces aren't * necessarily added in the same order), but the old IDs were * preserved anyway, so skip ID assignment for both resume and * recovery. */ if (data.found_vif) return 0; /* Therefore, in recovery, we can't get here */ if (WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))) return -EBUSY; mvmvif->id = find_first_bit(data.available_mac_ids, NUM_MAC_INDEX_DRIVER); if (mvmvif->id == NUM_MAC_INDEX_DRIVER) { IWL_ERR(mvm, "Failed to init MAC context - no free ID!\n"); ret = -EIO; goto exit_fail; } if (data.preferred_tsf != NUM_TSF_IDS) mvmvif->tsf_id = data.preferred_tsf; else mvmvif->tsf_id = find_first_bit(data.available_tsf_ids, NUM_TSF_IDS); if (mvmvif->tsf_id == NUM_TSF_IDS) { IWL_ERR(mvm, "Failed to init MAC context - no free TSF!\n"); ret = -EIO; goto exit_fail; } mvmvif->color = 0; INIT_LIST_HEAD(&mvmvif->time_event_data.list); mvmvif->time_event_data.id = TE_MAX; /* No need to allocate data queues to P2P Device MAC.*/ if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) vif->hw_queue[ac] = IEEE80211_INVAL_HW_QUEUE; return 0; } /* Find available queues, and allocate them to the ACs */ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { u8 queue = find_first_zero_bit(data.used_hw_queues, mvm->first_agg_queue); if (queue >= mvm->first_agg_queue) { IWL_ERR(mvm, "Failed to allocate queue\n"); ret = -EIO; goto exit_fail; } __set_bit(queue, data.used_hw_queues); vif->hw_queue[ac] = queue; } /* Allocate the CAB queue for softAP and GO interfaces */ if (vif->type == NL80211_IFTYPE_AP) { u8 queue = find_first_zero_bit(data.used_hw_queues, mvm->first_agg_queue); if (queue >= mvm->first_agg_queue) { IWL_ERR(mvm, "Failed to allocate cab queue\n"); ret = -EIO; goto exit_fail; } vif->cab_queue = queue; } else { vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; } mvmvif->bcast_sta.sta_id = IWL_MVM_STATION_COUNT; mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT; for (i = 0; i < NUM_IWL_MVM_SMPS_REQ; i++) mvmvif->smps_requests[i] = IEEE80211_SMPS_AUTOMATIC; return 0; exit_fail: memset(mvmvif, 0, sizeof(struct iwl_mvm_vif)); memset(vif->hw_queue, IEEE80211_INVAL_HW_QUEUE, sizeof(vif->hw_queue)); vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; return ret; } int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { u32 ac; int ret; lockdep_assert_held(&mvm->mutex); ret = iwl_mvm_mac_ctxt_allocate_resources(mvm, vif); if (ret) return ret; switch (vif->type) { case NL80211_IFTYPE_P2P_DEVICE: iwl_trans_ac_txq_enable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE, IWL_MVM_TX_FIFO_VO); break; case NL80211_IFTYPE_AP: iwl_trans_ac_txq_enable(mvm->trans, vif->cab_queue, IWL_MVM_TX_FIFO_MCAST); /* fall through */ default: for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) iwl_trans_ac_txq_enable(mvm->trans, vif->hw_queue[ac], iwl_mvm_ac_to_tx_fifo[ac]); break; } return 0; } void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { int ac; lockdep_assert_held(&mvm->mutex); switch (vif->type) { case NL80211_IFTYPE_P2P_DEVICE: iwl_trans_txq_disable(mvm->trans, IWL_MVM_OFFCHANNEL_QUEUE); break; case NL80211_IFTYPE_AP: iwl_trans_txq_disable(mvm->trans, vif->cab_queue); /* fall through */ default: for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) iwl_trans_txq_disable(mvm->trans, vif->hw_queue[ac]); } } static void iwl_mvm_ack_rates(struct iwl_mvm *mvm, struct ieee80211_vif *vif, enum ieee80211_band band, u8 *cck_rates, u8 *ofdm_rates) { struct ieee80211_supported_band *sband; unsigned long basic = vif->bss_conf.basic_rates; int lowest_present_ofdm = 100; int lowest_present_cck = 100; u8 cck = 0; u8 ofdm = 0; int i; sband = mvm->hw->wiphy->bands[band]; for_each_set_bit(i, &basic, BITS_PER_LONG) { int hw = sband->bitrates[i].hw_value; if (hw >= IWL_FIRST_OFDM_RATE) { ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); if (lowest_present_ofdm > hw) lowest_present_ofdm = hw; } else { BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); cck |= BIT(hw); if (lowest_present_cck > hw) lowest_present_cck = hw; } } /* * Now we've got the basic rates as bitmaps in the ofdm and cck * variables. This isn't sufficient though, as there might not * be all the right rates in the bitmap. E.g. if the only basic * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps * and 6 Mbps because the 802.11-2007 standard says in 9.6: * * [...] a STA responding to a received frame shall transmit * its Control Response frame [...] at the highest rate in the * BSSBasicRateSet parameter that is less than or equal to the * rate of the immediately previous frame in the frame exchange * sequence ([...]) and that is of the same modulation class * ([...]) as the received frame. If no rate contained in the * BSSBasicRateSet parameter meets these conditions, then the * control frame sent in response to a received frame shall be * transmitted at the highest mandatory rate of the PHY that is * less than or equal to the rate of the received frame, and * that is of the same modulation class as the received frame. * * As a consequence, we need to add all mandatory rates that are * lower than all of the basic rates to these bitmaps. */ if (IWL_RATE_24M_INDEX < lowest_present_ofdm) ofdm |= IWL_RATE_BIT_MSK(24) >> IWL_FIRST_OFDM_RATE; if (IWL_RATE_12M_INDEX < lowest_present_ofdm) ofdm |= IWL_RATE_BIT_MSK(12) >> IWL_FIRST_OFDM_RATE; /* 6M already there or needed so always add */ ofdm |= IWL_RATE_BIT_MSK(6) >> IWL_FIRST_OFDM_RATE; /* * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. * Note, however: * - if no CCK rates are basic, it must be ERP since there must * be some basic rates at all, so they're OFDM => ERP PHY * (or we're in 5 GHz, and the cck bitmap will never be used) * - if 11M is a basic rate, it must be ERP as well, so add 5.5M * - if 5.5M is basic, 1M and 2M are mandatory * - if 2M is basic, 1M is mandatory * - if 1M is basic, that's the only valid ACK rate. * As a consequence, it's not as complicated as it sounds, just add * any lower rates to the ACK rate bitmap. */ if (IWL_RATE_11M_INDEX < lowest_present_cck) cck |= IWL_RATE_BIT_MSK(11) >> IWL_FIRST_CCK_RATE; if (IWL_RATE_5M_INDEX < lowest_present_cck) cck |= IWL_RATE_BIT_MSK(5) >> IWL_FIRST_CCK_RATE; if (IWL_RATE_2M_INDEX < lowest_present_cck) cck |= IWL_RATE_BIT_MSK(2) >> IWL_FIRST_CCK_RATE; /* 1M already there or needed so always add */ cck |= IWL_RATE_BIT_MSK(1) >> IWL_FIRST_CCK_RATE; *cck_rates = cck; *ofdm_rates = ofdm; } static void iwl_mvm_mac_ctxt_set_ht_flags(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mac_ctx_cmd *cmd) { /* for both sta and ap, ht_operation_mode hold the protection_mode */ u8 protection_mode = vif->bss_conf.ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION; /* The fw does not distinguish between ht and fat */ u32 ht_flag = MAC_PROT_FLG_HT_PROT | MAC_PROT_FLG_FAT_PROT; IWL_DEBUG_RATE(mvm, "protection mode set to %d\n", protection_mode); /* * See section 9.23.3.1 of IEEE 80211-2012. * Nongreenfield HT STAs Present is not supported. */ switch (protection_mode) { case IEEE80211_HT_OP_MODE_PROTECTION_NONE: break; case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: cmd->protection_flags |= cpu_to_le32(ht_flag); break; case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: /* Protect when channel wider than 20MHz */ if (vif->bss_conf.chandef.width > NL80211_CHAN_WIDTH_20) cmd->protection_flags |= cpu_to_le32(ht_flag); break; default: IWL_ERR(mvm, "Illegal protection mode %d\n", protection_mode); break; } } static void iwl_mvm_mac_ctxt_cmd_common(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mac_ctx_cmd *cmd, u32 action) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct ieee80211_chanctx_conf *chanctx; bool ht_enabled = !!(vif->bss_conf.ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION); u8 cck_ack_rates, ofdm_ack_rates; int i; cmd->id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); cmd->action = cpu_to_le32(action); switch (vif->type) { case NL80211_IFTYPE_STATION: if (vif->p2p) cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_STA); else cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_BSS_STA); break; case NL80211_IFTYPE_AP: cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_GO); break; case NL80211_IFTYPE_MONITOR: cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_LISTENER); break; case NL80211_IFTYPE_P2P_DEVICE: cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_P2P_DEVICE); break; case NL80211_IFTYPE_ADHOC: cmd->mac_type = cpu_to_le32(FW_MAC_TYPE_IBSS); break; default: WARN_ON_ONCE(1); } cmd->tsf_id = cpu_to_le32(mvmvif->tsf_id); memcpy(cmd->node_addr, vif->addr, ETH_ALEN); if (vif->bss_conf.bssid) memcpy(cmd->bssid_addr, vif->bss_conf.bssid, ETH_ALEN); else eth_broadcast_addr(cmd->bssid_addr); rcu_read_lock(); chanctx = rcu_dereference(vif->chanctx_conf); iwl_mvm_ack_rates(mvm, vif, chanctx ? chanctx->def.chan->band : IEEE80211_BAND_2GHZ, &cck_ack_rates, &ofdm_ack_rates); rcu_read_unlock(); cmd->cck_rates = cpu_to_le32((u32)cck_ack_rates); cmd->ofdm_rates = cpu_to_le32((u32)ofdm_ack_rates); cmd->cck_short_preamble = cpu_to_le32(vif->bss_conf.use_short_preamble ? MAC_FLG_SHORT_PREAMBLE : 0); cmd->short_slot = cpu_to_le32(vif->bss_conf.use_short_slot ? MAC_FLG_SHORT_SLOT : 0); for (i = 0; i < IEEE80211_NUM_ACS; i++) { u8 txf = iwl_mvm_ac_to_tx_fifo[i]; cmd->ac[txf].cw_min = cpu_to_le16(mvmvif->queue_params[i].cw_min); cmd->ac[txf].cw_max = cpu_to_le16(mvmvif->queue_params[i].cw_max); cmd->ac[txf].edca_txop = cpu_to_le16(mvmvif->queue_params[i].txop * 32); cmd->ac[txf].aifsn = mvmvif->queue_params[i].aifs; cmd->ac[txf].fifos_mask = BIT(txf); } /* in AP mode, the MCAST FIFO takes the EDCA params from VO */ if (vif->type == NL80211_IFTYPE_AP) cmd->ac[IWL_MVM_TX_FIFO_VO].fifos_mask |= BIT(IWL_MVM_TX_FIFO_MCAST); if (vif->bss_conf.qos) cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_UPDATE_EDCA); /* Don't use cts to self as the fw doesn't support it currently. */ if (vif->bss_conf.use_cts_prot) { cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 8) cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_SELF_CTS_EN); } IWL_DEBUG_RATE(mvm, "use_cts_prot %d, ht_operation_mode %d\n", vif->bss_conf.use_cts_prot, vif->bss_conf.ht_operation_mode); if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); if (ht_enabled) iwl_mvm_mac_ctxt_set_ht_flags(mvm, vif, cmd); cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP); } static int iwl_mvm_mac_ctxt_send_cmd(struct iwl_mvm *mvm, struct iwl_mac_ctx_cmd *cmd) { int ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, CMD_SYNC, sizeof(*cmd), cmd); if (ret) IWL_ERR(mvm, "Failed to send MAC context (action:%d): %d\n", le32_to_cpu(cmd->action), ret); return ret; } /* * Fill the specific data for mac context of type station or p2p client */ static void iwl_mvm_mac_ctxt_cmd_fill_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mac_data_sta *ctxt_sta, bool force_assoc_off) { /* We need the dtim_period to set the MAC as associated */ if (vif->bss_conf.assoc && vif->bss_conf.dtim_period && !force_assoc_off) { u32 dtim_offs; /* * The DTIM count counts down, so when it is N that means N * more beacon intervals happen until the DTIM TBTT. Therefore * add this to the current time. If that ends up being in the * future, the firmware will handle it. * * Also note that the system_timestamp (which we get here as * "sync_device_ts") and TSF timestamp aren't at exactly the * same offset in the frame -- the TSF is at the first symbol * of the TSF, the system timestamp is at signal acquisition * time. This means there's an offset between them of at most * a few hundred microseconds (24 * 8 bits + PLCP time gives * 384us in the longest case), this is currently not relevant * as the firmware wakes up around 2ms before the TBTT. */ dtim_offs = vif->bss_conf.sync_dtim_count * vif->bss_conf.beacon_int; /* convert TU to usecs */ dtim_offs *= 1024; ctxt_sta->dtim_tsf = cpu_to_le64(vif->bss_conf.sync_tsf + dtim_offs); ctxt_sta->dtim_time = cpu_to_le32(vif->bss_conf.sync_device_ts + dtim_offs); IWL_DEBUG_INFO(mvm, "DTIM TBTT is 0x%llx/0x%x, offset %d\n", le64_to_cpu(ctxt_sta->dtim_tsf), le32_to_cpu(ctxt_sta->dtim_time), dtim_offs); ctxt_sta->is_assoc = cpu_to_le32(1); } else { ctxt_sta->is_assoc = cpu_to_le32(0); } ctxt_sta->bi = cpu_to_le32(vif->bss_conf.beacon_int); ctxt_sta->bi_reciprocal = cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); ctxt_sta->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * vif->bss_conf.dtim_period); ctxt_sta->dtim_reciprocal = cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * vif->bss_conf.dtim_period)); ctxt_sta->listen_interval = cpu_to_le32(mvm->hw->conf.listen_interval); ctxt_sta->assoc_id = cpu_to_le32(vif->bss_conf.aid); } static int iwl_mvm_mac_ctxt_cmd_station(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mac_ctx_cmd cmd = {}; WARN_ON(vif->type != NL80211_IFTYPE_STATION || vif->p2p); /* Fill the common data for all mac context types */ iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action); /* Allow beacons to pass through as long as we are not associated,or we * do not have dtim period information */ if (!vif->bss_conf.assoc || !vif->bss_conf.dtim_period) cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_BEACON); else cmd.filter_flags &= ~cpu_to_le32(MAC_FILTER_IN_BEACON); /* Fill the data specific for station mode */ iwl_mvm_mac_ctxt_cmd_fill_sta(mvm, vif, &cmd.sta, action == FW_CTXT_ACTION_ADD); return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } static int iwl_mvm_mac_ctxt_cmd_p2p_client(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mac_ctx_cmd cmd = {}; struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; WARN_ON(vif->type != NL80211_IFTYPE_STATION || !vif->p2p); /* Fill the common data for all mac context types */ iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action); /* Fill the data specific for station mode */ iwl_mvm_mac_ctxt_cmd_fill_sta(mvm, vif, &cmd.p2p_sta.sta, action == FW_CTXT_ACTION_ADD); cmd.p2p_sta.ctwin = cpu_to_le32(noa->oppps_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK); return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } static int iwl_mvm_mac_ctxt_cmd_listener(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mac_ctx_cmd cmd = {}; WARN_ON(vif->type != NL80211_IFTYPE_MONITOR); iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action); cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROMISC | MAC_FILTER_IN_CONTROL_AND_MGMT | MAC_FILTER_IN_BEACON | MAC_FILTER_IN_PROBE_REQUEST | MAC_FILTER_IN_CRC32); mvm->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } static int iwl_mvm_mac_ctxt_cmd_ibss(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mac_ctx_cmd cmd = {}; WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action); cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_BEACON | MAC_FILTER_IN_PROBE_REQUEST); /* cmd.ibss.beacon_time/cmd.ibss.beacon_tsf are curently ignored */ cmd.ibss.bi = cpu_to_le32(vif->bss_conf.beacon_int); cmd.ibss.bi_reciprocal = cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); /* TODO: Assumes that the beacon id == mac context id */ cmd.ibss.beacon_template = cpu_to_le32(mvmvif->id); return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } struct iwl_mvm_go_iterator_data { bool go_active; }; static void iwl_mvm_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm_go_iterator_data *data = _data; struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); if (vif->type == NL80211_IFTYPE_AP && vif->p2p && mvmvif->ap_ibss_active) data->go_active = true; } static int iwl_mvm_mac_ctxt_cmd_p2p_device(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mac_ctx_cmd cmd = {}; struct iwl_mvm_go_iterator_data data = {}; WARN_ON(vif->type != NL80211_IFTYPE_P2P_DEVICE); iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action); cmd.protection_flags |= cpu_to_le32(MAC_PROT_FLG_TGG_PROTECT); /* Override the filter flags to accept only probe requests */ cmd.filter_flags = cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); /* * This flag should be set to true when the P2P Device is * discoverable and there is at least another active P2P GO. Settings * this flag will allow the P2P Device to be discoverable on other * channels in addition to its listen channel. * Note that this flag should not be set in other cases as it opens the * Rx filters on all MAC and increases the number of interrupts. */ ieee80211_iterate_active_interfaces_atomic( mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, iwl_mvm_go_iterator, &data); cmd.p2p_dev.is_disc_extended = cpu_to_le32(data.go_active ? 1 : 0); return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } static void iwl_mvm_mac_ctxt_set_tim(struct iwl_mvm *mvm, struct iwl_mac_beacon_cmd *beacon_cmd, u8 *beacon, u32 frame_size) { u32 tim_idx; struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon; /* The index is relative to frame start but we start looking at the * variable-length part of the beacon. */ tim_idx = mgmt->u.beacon.variable - beacon; /* Parse variable-length elements of beacon to find WLAN_EID_TIM */ while ((tim_idx < (frame_size - 2)) && (beacon[tim_idx] != WLAN_EID_TIM)) tim_idx += beacon[tim_idx+1] + 2; /* If TIM field was found, set variables */ if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) { beacon_cmd->tim_idx = cpu_to_le32(tim_idx); beacon_cmd->tim_size = cpu_to_le32((u32)beacon[tim_idx+1]); } else { IWL_WARN(mvm, "Unable to find TIM Element in beacon\n"); } } static int iwl_mvm_mac_ctxt_send_beacon(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct sk_buff *beacon) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_host_cmd cmd = { .id = BEACON_TEMPLATE_CMD, .flags = CMD_ASYNC, }; struct iwl_mac_beacon_cmd beacon_cmd = {}; struct ieee80211_tx_info *info; u32 beacon_skb_len; u32 rate; if (WARN_ON(!beacon)) return -EINVAL; beacon_skb_len = beacon->len; /* TODO: for now the beacon template id is set to be the mac context id. * Might be better to handle it as another resource ... */ beacon_cmd.template_id = cpu_to_le32((u32)mvmvif->id); /* Set up TX command fields */ beacon_cmd.tx.len = cpu_to_le16((u16)beacon_skb_len); beacon_cmd.tx.sta_id = mvmvif->bcast_sta.sta_id; beacon_cmd.tx.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); beacon_cmd.tx.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | TX_CMD_FLG_BT_DIS | TX_CMD_FLG_TSF); mvm->mgmt_last_antenna_idx = iwl_mvm_next_antenna(mvm, iwl_fw_valid_tx_ant(mvm->fw), mvm->mgmt_last_antenna_idx); beacon_cmd.tx.rate_n_flags = cpu_to_le32(BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS); info = IEEE80211_SKB_CB(beacon); if (info->band == IEEE80211_BAND_5GHZ || vif->p2p) { rate = IWL_FIRST_OFDM_RATE; } else { rate = IWL_FIRST_CCK_RATE; beacon_cmd.tx.rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK); } beacon_cmd.tx.rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate)); /* Set up TX beacon command fields */ if (vif->type == NL80211_IFTYPE_AP) iwl_mvm_mac_ctxt_set_tim(mvm, &beacon_cmd, beacon->data, beacon_skb_len); /* Submit command */ cmd.len[0] = sizeof(beacon_cmd); cmd.data[0] = &beacon_cmd; cmd.dataflags[0] = 0; cmd.len[1] = beacon_skb_len; cmd.data[1] = beacon->data; cmd.dataflags[1] = IWL_HCMD_DFL_DUP; return iwl_mvm_send_cmd(mvm, &cmd); } /* The beacon template for the AP/GO/IBSS has changed and needs update */ int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct sk_buff *beacon; int ret; WARN_ON(vif->type != NL80211_IFTYPE_AP && vif->type != NL80211_IFTYPE_ADHOC); beacon = ieee80211_beacon_get(mvm->hw, vif); if (!beacon) return -ENOMEM; ret = iwl_mvm_mac_ctxt_send_beacon(mvm, vif, beacon); dev_kfree_skb(beacon); return ret; } struct iwl_mvm_mac_ap_iterator_data { struct iwl_mvm *mvm; struct ieee80211_vif *vif; u32 beacon_device_ts; u16 beacon_int; }; /* Find the beacon_device_ts and beacon_int for a managed interface */ static void iwl_mvm_mac_ap_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_mvm_mac_ap_iterator_data *data = _data; if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) return; /* Station client has higher priority over P2P client*/ if (vif->p2p && data->beacon_device_ts) return; data->beacon_device_ts = vif->bss_conf.sync_device_ts; data->beacon_int = vif->bss_conf.beacon_int; } /* * Fill the specific data for mac context of type AP of P2P GO */ static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct iwl_mac_data_ap *ctxt_ap, bool add) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mvm_mac_ap_iterator_data data = { .mvm = mvm, .vif = vif, .beacon_device_ts = 0 }; ctxt_ap->bi = cpu_to_le32(vif->bss_conf.beacon_int); ctxt_ap->bi_reciprocal = cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int)); ctxt_ap->dtim_interval = cpu_to_le32(vif->bss_conf.beacon_int * vif->bss_conf.dtim_period); ctxt_ap->dtim_reciprocal = cpu_to_le32(iwl_mvm_reciprocal(vif->bss_conf.beacon_int * vif->bss_conf.dtim_period)); ctxt_ap->mcast_qid = cpu_to_le32(vif->cab_queue); /* * Only set the beacon time when the MAC is being added, when we * just modify the MAC then we should keep the time -- the firmware * can otherwise have a "jumping" TBTT. */ if (add) { /* * If there is a station/P2P client interface which is * associated, set the AP's TBTT far enough from the station's * TBTT. Otherwise, set it to the current system time */ ieee80211_iterate_active_interfaces_atomic( mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL, iwl_mvm_mac_ap_iterator, &data); if (data.beacon_device_ts) { u32 rand = (prandom_u32() % (80 - 20)) + 20; mvmvif->ap_beacon_time = data.beacon_device_ts + ieee80211_tu_to_usec(data.beacon_int * rand / 100); } else { mvmvif->ap_beacon_time = iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG); } } ctxt_ap->beacon_time = cpu_to_le32(mvmvif->ap_beacon_time); ctxt_ap->beacon_tsf = 0; /* unused */ /* TODO: Assume that the beacon id == mac context id */ ctxt_ap->beacon_template = cpu_to_le32(mvmvif->id); } static int iwl_mvm_mac_ctxt_cmd_ap(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mac_ctx_cmd cmd = {}; WARN_ON(vif->type != NL80211_IFTYPE_AP || vif->p2p); /* Fill the common data for all mac context types */ iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action); /* Also enable probe requests to pass */ cmd.filter_flags |= cpu_to_le32(MAC_FILTER_IN_PROBE_REQUEST); /* Fill the data specific for ap mode */ iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.ap, action == FW_CTXT_ACTION_ADD); return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } static int iwl_mvm_mac_ctxt_cmd_go(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { struct iwl_mac_ctx_cmd cmd = {}; struct ieee80211_p2p_noa_attr *noa = &vif->bss_conf.p2p_noa_attr; WARN_ON(vif->type != NL80211_IFTYPE_AP || !vif->p2p); /* Fill the common data for all mac context types */ iwl_mvm_mac_ctxt_cmd_common(mvm, vif, &cmd, action); /* Fill the data specific for GO mode */ iwl_mvm_mac_ctxt_cmd_fill_ap(mvm, vif, &cmd.go.ap, action == FW_CTXT_ACTION_ADD); cmd.go.ctwin = cpu_to_le32(noa->oppps_ctwindow & IEEE80211_P2P_OPPPS_CTWINDOW_MASK); cmd.go.opp_ps_enabled = cpu_to_le32(!!(noa->oppps_ctwindow & IEEE80211_P2P_OPPPS_ENABLE_BIT)); return iwl_mvm_mac_ctxt_send_cmd(mvm, &cmd); } static int iwl_mvm_mac_ctx_send(struct iwl_mvm *mvm, struct ieee80211_vif *vif, u32 action) { switch (vif->type) { case NL80211_IFTYPE_STATION: if (!vif->p2p) return iwl_mvm_mac_ctxt_cmd_station(mvm, vif, action); else return iwl_mvm_mac_ctxt_cmd_p2p_client(mvm, vif, action); break; case NL80211_IFTYPE_AP: if (!vif->p2p) return iwl_mvm_mac_ctxt_cmd_ap(mvm, vif, action); else return iwl_mvm_mac_ctxt_cmd_go(mvm, vif, action); break; case NL80211_IFTYPE_MONITOR: return iwl_mvm_mac_ctxt_cmd_listener(mvm, vif, action); case NL80211_IFTYPE_P2P_DEVICE: return iwl_mvm_mac_ctxt_cmd_p2p_device(mvm, vif, action); case NL80211_IFTYPE_ADHOC: return iwl_mvm_mac_ctxt_cmd_ibss(mvm, vif, action); default: break; } return -EOPNOTSUPP; } int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); int ret; if (WARN_ONCE(mvmvif->uploaded, "Adding active MAC %pM/%d\n", vif->addr, ieee80211_vif_type_p2p(vif))) return -EIO; ret = iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_ADD); if (ret) return ret; /* will only do anything at resume from D3 time */ iwl_mvm_set_last_nonqos_seq(mvm, vif); mvmvif->uploaded = true; return 0; } int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); if (WARN_ONCE(!mvmvif->uploaded, "Changing inactive MAC %pM/%d\n", vif->addr, ieee80211_vif_type_p2p(vif))) return -EIO; return iwl_mvm_mac_ctx_send(mvm, vif, FW_CTXT_ACTION_MODIFY); } int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif) { struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); struct iwl_mac_ctx_cmd cmd; int ret; if (WARN_ONCE(!mvmvif->uploaded, "Removing inactive MAC %pM/%d\n", vif->addr, ieee80211_vif_type_p2p(vif))) return -EIO; memset(&cmd, 0, sizeof(cmd)); cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); ret = iwl_mvm_send_cmd_pdu(mvm, MAC_CONTEXT_CMD, CMD_SYNC, sizeof(cmd), &cmd); if (ret) { IWL_ERR(mvm, "Failed to remove MAC context: %d\n", ret); return ret; } mvmvif->uploaded = false; if (vif->type == NL80211_IFTYPE_MONITOR) mvm->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; return 0; } int iwl_mvm_rx_beacon_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_beacon_notif *beacon = (void *)pkt->data; u16 status __maybe_unused = le16_to_cpu(beacon->beacon_notify_hdr.status.status); u32 rate __maybe_unused = le32_to_cpu(beacon->beacon_notify_hdr.initial_rate); IWL_DEBUG_RX(mvm, "beacon status %#x retries:%d tsf:0x%16llX rate:%d\n", status & TX_STATUS_MSK, beacon->beacon_notify_hdr.failure_frame, le64_to_cpu(beacon->tsf), rate); return 0; } static void iwl_mvm_beacon_loss_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) { struct iwl_missed_beacons_notif *missed_beacons = _data; struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); if (mvmvif->id != (u16)le32_to_cpu(missed_beacons->mac_id)) return; /* * TODO: the threshold should be adjusted based on latency conditions, * and/or in case of a CS flow on one of the other AP vifs. */ if (le32_to_cpu(missed_beacons->consec_missed_beacons_since_last_rx) > IWL_MVM_MISSED_BEACONS_THRESHOLD) ieee80211_beacon_loss(vif); } int iwl_mvm_rx_missed_beacons_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_missed_beacons_notif *mb = (void *)pkt->data; IWL_DEBUG_INFO(mvm, "missed bcn mac_id=%u, consecutive=%u (%u, %u, %u)\n", le32_to_cpu(mb->mac_id), le32_to_cpu(mb->consec_missed_beacons), le32_to_cpu(mb->consec_missed_beacons_since_last_rx), le32_to_cpu(mb->num_recvd_beacons), le32_to_cpu(mb->num_expected_beacons)); ieee80211_iterate_active_interfaces_atomic(mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_beacon_loss_iterator, mb); return 0; }