| /****************************************************************************** |
| * |
| * 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 <linux/etherdevice.h> |
| #include <net/mac80211.h> |
| #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_BK, |
| IWL_MVM_TX_FIFO_BE, |
| IWL_MVM_TX_FIFO_VI, |
| IWL_MVM_TX_FIFO_VO, |
| }; |
| |
| 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_FIRST_AGG_QUEUE)]; |
| 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, ac; |
| |
| if (vif->type == NL80211_IFTYPE_P2P_DEVICE) |
| return BIT(IWL_OFFCHANNEL_QUEUE); |
| |
| qmask = (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE) ? |
| BIT(vif->cab_queue) : 0; |
| |
| 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(IWL_MVM_AUX_QUEUE) | |
| BIT(IWL_MVM_CMD_QUEUE) |
| }, |
| .found_vif = false, |
| }; |
| u32 ac; |
| int ret; |
| |
| /* |
| * 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 vif */ |
| if (vif->type != NL80211_IFTYPE_STATION || vif->p2p) |
| __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 */ |
| WARN_ON_ONCE(test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)); |
| |
| 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, |
| IWL_MVM_FIRST_AGG_QUEUE); |
| |
| if (queue >= IWL_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, |
| IWL_MVM_FIRST_AGG_QUEUE); |
| |
| if (queue >= IWL_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; |
| |
| 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_VO); |
| /* 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_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; |
| 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 < AC_NUM; i++) { |
| cmd->ac[i].cw_min = cpu_to_le16(mvmvif->queue_params[i].cw_min); |
| cmd->ac[i].cw_max = cpu_to_le16(mvmvif->queue_params[i].cw_max); |
| cmd->ac[i].aifsn = mvmvif->queue_params[i].aifs; |
| cmd->ac[i].edca_txop = |
| cpu_to_le16(mvmvif->queue_params[i].txop * 32); |
| cmd->ac[i].fifos_mask = BIT(iwl_mvm_ac_to_tx_fifo[i]); |
| } |
| |
| 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); |
| |
| /* |
| * I think that we should enable these 2 flags regardless the HT PROT |
| * fields in the HT IE, but I am not sure. Someone knows whom to ask?... |
| */ |
| if (vif->bss_conf.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { |
| cmd->qos_flags |= cpu_to_le32(MAC_QOS_FLG_TGN); |
| cmd->protection_flags |= cpu_to_le32(MAC_PROT_FLG_HT_PROT | |
| MAC_PROT_FLG_FAT_PROT); |
| } |
| |
| 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) |
| { |
| /* We need the dtim_period to set the MAC as associated */ |
| if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) { |
| 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); |
| |
| 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 = {}; |
| |
| 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); |
| |
| cmd.p2p_sta.ctwin = cpu_to_le32(vif->bss_conf.p2p_ctwindow); |
| |
| 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); |
| /* No other data to be filled */ |
| 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_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, mvm->nvm_data->valid_tx_ant, |
| 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 */ |
| 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 context 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); |
| |
| 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; |
| } |
| |
| /* |
| * 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) |
| { |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| u32 curr_dev_time; |
| |
| 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); |
| curr_dev_time = iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG); |
| ctxt_ap->beacon_time = cpu_to_le32(curr_dev_time); |
| |
| ctxt_ap->beacon_tsf = cpu_to_le64(curr_dev_time); |
| |
| /* 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); |
| |
| 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 = {}; |
| |
| 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); |
| |
| cmd.go.ctwin = cpu_to_le32(vif->bss_conf.p2p_ctwindow); |
| cmd.go.opp_ps_enabled = cpu_to_le32(!!vif->bss_conf.p2p_oppps); |
| |
| 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); |
| 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; |
| |
| 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; |
| return 0; |
| } |