| /****************************************************************************** |
| * |
| * This file is provided under a dual BSD/GPLv2 license. When using or |
| * redistributing this file, you may do so under either license. |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, |
| * USA |
| * |
| * The full GNU General Public License is included in this distribution |
| * in the file called COPYING. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| *****************************************************************************/ |
| |
| #include <linux/jiffies.h> |
| #include <net/mac80211.h> |
| |
| #include "iwl-notif-wait.h" |
| #include "iwl-trans.h" |
| #include "fw-api.h" |
| #include "time-event.h" |
| #include "mvm.h" |
| #include "iwl-io.h" |
| #include "iwl-prph.h" |
| |
| /* |
| * For the high priority TE use a time event type that has similar priority to |
| * the FW's action scan priority. |
| */ |
| #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE |
| #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC |
| |
| void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, |
| struct iwl_mvm_time_event_data *te_data) |
| { |
| lockdep_assert_held(&mvm->time_event_lock); |
| |
| if (te_data->id == TE_MAX) |
| return; |
| |
| list_del(&te_data->list); |
| te_data->running = false; |
| te_data->uid = 0; |
| te_data->id = TE_MAX; |
| te_data->vif = NULL; |
| } |
| |
| void iwl_mvm_roc_done_wk(struct work_struct *wk) |
| { |
| struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); |
| u32 queues = 0; |
| |
| /* |
| * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit. |
| * This will cause the TX path to drop offchannel transmissions. |
| * That would also be done by mac80211, but it is racy, in particular |
| * in the case that the time event actually completed in the firmware |
| * (which is handled in iwl_mvm_te_handle_notif). |
| */ |
| if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) { |
| queues |= BIT(IWL_MVM_OFFCHANNEL_QUEUE); |
| iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); |
| } |
| if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) { |
| queues |= BIT(mvm->aux_queue); |
| iwl_mvm_unref(mvm, IWL_MVM_REF_ROC_AUX); |
| } |
| |
| synchronize_net(); |
| |
| /* |
| * Flush the offchannel queue -- this is called when the time |
| * event finishes or is canceled, so that frames queued for it |
| * won't get stuck on the queue and be transmitted in the next |
| * time event. |
| * We have to send the command asynchronously since this cannot |
| * be under the mutex for locking reasons, but that's not an |
| * issue as it will have to complete before the next command is |
| * executed, and a new time event means a new command. |
| */ |
| iwl_mvm_flush_tx_path(mvm, queues, false); |
| } |
| |
| static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) |
| { |
| /* |
| * Of course, our status bit is just as racy as mac80211, so in |
| * addition, fire off the work struct which will drop all frames |
| * from the hardware queues that made it through the race. First |
| * it will of course synchronize the TX path to make sure that |
| * any *new* TX will be rejected. |
| */ |
| schedule_work(&mvm->roc_done_wk); |
| } |
| |
| static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) |
| { |
| struct ieee80211_vif *csa_vif; |
| |
| rcu_read_lock(); |
| |
| csa_vif = rcu_dereference(mvm->csa_vif); |
| if (!csa_vif || !csa_vif->csa_active) |
| goto out_unlock; |
| |
| IWL_DEBUG_TE(mvm, "CSA NOA started\n"); |
| |
| /* |
| * CSA NoA is started but we still have beacons to |
| * transmit on the current channel. |
| * So we just do nothing here and the switch |
| * will be performed on the last TBTT. |
| */ |
| if (!ieee80211_csa_is_complete(csa_vif)) { |
| IWL_WARN(mvm, "CSA NOA started too early\n"); |
| goto out_unlock; |
| } |
| |
| ieee80211_csa_finish(csa_vif); |
| |
| rcu_read_unlock(); |
| |
| RCU_INIT_POINTER(mvm->csa_vif, NULL); |
| |
| return; |
| |
| out_unlock: |
| rcu_read_unlock(); |
| } |
| |
| static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| const char *errmsg) |
| { |
| if (vif->type != NL80211_IFTYPE_STATION) |
| return false; |
| if (vif->bss_conf.assoc && vif->bss_conf.dtim_period) |
| return false; |
| if (errmsg) |
| IWL_ERR(mvm, "%s\n", errmsg); |
| |
| iwl_mvm_connection_loss(mvm, vif, errmsg); |
| return true; |
| } |
| |
| static void |
| iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, |
| struct iwl_mvm_time_event_data *te_data, |
| struct iwl_time_event_notif *notif) |
| { |
| struct ieee80211_vif *vif = te_data->vif; |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| |
| if (!notif->status) |
| IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); |
| |
| switch (te_data->vif->type) { |
| case NL80211_IFTYPE_AP: |
| if (!notif->status) |
| mvmvif->csa_failed = true; |
| iwl_mvm_csa_noa_start(mvm); |
| break; |
| case NL80211_IFTYPE_STATION: |
| if (!notif->status) { |
| iwl_mvm_connection_loss(mvm, vif, |
| "CSA TE failed to start"); |
| break; |
| } |
| iwl_mvm_csa_client_absent(mvm, te_data->vif); |
| ieee80211_chswitch_done(te_data->vif, true); |
| break; |
| default: |
| /* should never happen */ |
| WARN_ON_ONCE(1); |
| break; |
| } |
| |
| /* we don't need it anymore */ |
| iwl_mvm_te_clear_data(mvm, te_data); |
| } |
| |
| static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm, |
| struct iwl_time_event_notif *notif, |
| struct iwl_mvm_time_event_data *te_data) |
| { |
| struct iwl_fw_dbg_trigger_tlv *trig; |
| struct iwl_fw_dbg_trigger_time_event *te_trig; |
| int i; |
| |
| if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT)) |
| return; |
| |
| trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TIME_EVENT); |
| te_trig = (void *)trig->data; |
| |
| if (!iwl_fw_dbg_trigger_check_stop(mvm, te_data->vif, trig)) |
| return; |
| |
| for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) { |
| u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id); |
| u32 trig_action_bitmap = |
| le32_to_cpu(te_trig->time_events[i].action_bitmap); |
| u32 trig_status_bitmap = |
| le32_to_cpu(te_trig->time_events[i].status_bitmap); |
| |
| if (trig_te_id != te_data->id || |
| !(trig_action_bitmap & le32_to_cpu(notif->action)) || |
| !(trig_status_bitmap & BIT(le32_to_cpu(notif->status)))) |
| continue; |
| |
| iwl_mvm_fw_dbg_collect_trig(mvm, trig, |
| "Time event %d Action 0x%x received status: %d", |
| te_data->id, |
| le32_to_cpu(notif->action), |
| le32_to_cpu(notif->status)); |
| break; |
| } |
| } |
| |
| /* |
| * Handles a FW notification for an event that is known to the driver. |
| * |
| * @mvm: the mvm component |
| * @te_data: the time event data |
| * @notif: the notification data corresponding the time event data. |
| */ |
| static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, |
| struct iwl_mvm_time_event_data *te_data, |
| struct iwl_time_event_notif *notif) |
| { |
| lockdep_assert_held(&mvm->time_event_lock); |
| |
| IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", |
| le32_to_cpu(notif->unique_id), |
| le32_to_cpu(notif->action)); |
| |
| iwl_mvm_te_check_trigger(mvm, notif, te_data); |
| |
| /* |
| * The FW sends the start/end time event notifications even for events |
| * that it fails to schedule. This is indicated in the status field of |
| * the notification. This happens in cases that the scheduler cannot |
| * find a schedule that can handle the event (for example requesting a |
| * P2P Device discoveribility, while there are other higher priority |
| * events in the system). |
| */ |
| if (!le32_to_cpu(notif->status)) { |
| const char *msg; |
| |
| if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) |
| msg = "Time Event start notification failure"; |
| else |
| msg = "Time Event end notification failure"; |
| |
| IWL_DEBUG_TE(mvm, "%s\n", msg); |
| |
| if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { |
| iwl_mvm_te_clear_data(mvm, te_data); |
| return; |
| } |
| } |
| |
| if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { |
| IWL_DEBUG_TE(mvm, |
| "TE ended - current time %lu, estimated end %lu\n", |
| jiffies, te_data->end_jiffies); |
| |
| switch (te_data->vif->type) { |
| case NL80211_IFTYPE_P2P_DEVICE: |
| ieee80211_remain_on_channel_expired(mvm->hw); |
| iwl_mvm_roc_finished(mvm); |
| break; |
| case NL80211_IFTYPE_STATION: |
| /* |
| * By now, we should have finished association |
| * and know the dtim period. |
| */ |
| iwl_mvm_te_check_disconnect(mvm, te_data->vif, |
| "No association and the time event is over already..."); |
| break; |
| default: |
| break; |
| } |
| |
| iwl_mvm_te_clear_data(mvm, te_data); |
| } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { |
| te_data->running = true; |
| te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); |
| |
| if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { |
| set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); |
| iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); |
| ieee80211_ready_on_channel(mvm->hw); |
| } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { |
| iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); |
| } |
| } else { |
| IWL_WARN(mvm, "Got TE with unknown action\n"); |
| } |
| } |
| |
| /* |
| * Handle A Aux ROC time event |
| */ |
| static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, |
| struct iwl_time_event_notif *notif) |
| { |
| struct iwl_mvm_time_event_data *te_data, *tmp; |
| bool aux_roc_te = false; |
| |
| list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { |
| if (le32_to_cpu(notif->unique_id) == te_data->uid) { |
| aux_roc_te = true; |
| break; |
| } |
| } |
| if (!aux_roc_te) /* Not a Aux ROC time event */ |
| return -EINVAL; |
| |
| iwl_mvm_te_check_trigger(mvm, notif, te_data); |
| |
| if (!le32_to_cpu(notif->status)) { |
| IWL_DEBUG_TE(mvm, |
| "ERROR: Aux ROC Time Event %s notification failure\n", |
| (le32_to_cpu(notif->action) & |
| TE_V2_NOTIF_HOST_EVENT_START) ? "start" : "end"); |
| return -EINVAL; |
| } |
| |
| IWL_DEBUG_TE(mvm, |
| "Aux ROC time event notification - UID = 0x%x action %d\n", |
| le32_to_cpu(notif->unique_id), |
| le32_to_cpu(notif->action)); |
| |
| if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { |
| /* End TE, notify mac80211 */ |
| ieee80211_remain_on_channel_expired(mvm->hw); |
| iwl_mvm_roc_finished(mvm); /* flush aux queue */ |
| list_del(&te_data->list); /* remove from list */ |
| te_data->running = false; |
| te_data->vif = NULL; |
| te_data->uid = 0; |
| te_data->id = TE_MAX; |
| } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { |
| set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); |
| te_data->running = true; |
| iwl_mvm_ref(mvm, IWL_MVM_REF_ROC_AUX); |
| ieee80211_ready_on_channel(mvm->hw); /* Start TE */ |
| } else { |
| IWL_DEBUG_TE(mvm, |
| "ERROR: Unknown Aux ROC Time Event (action = %d)\n", |
| le32_to_cpu(notif->action)); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * The Rx handler for time event notifications |
| */ |
| void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb) |
| { |
| struct iwl_rx_packet *pkt = rxb_addr(rxb); |
| struct iwl_time_event_notif *notif = (void *)pkt->data; |
| struct iwl_mvm_time_event_data *te_data, *tmp; |
| |
| IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", |
| le32_to_cpu(notif->unique_id), |
| le32_to_cpu(notif->action)); |
| |
| spin_lock_bh(&mvm->time_event_lock); |
| /* This time event is triggered for Aux ROC request */ |
| if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) |
| goto unlock; |
| |
| list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { |
| if (le32_to_cpu(notif->unique_id) == te_data->uid) |
| iwl_mvm_te_handle_notif(mvm, te_data, notif); |
| } |
| unlock: |
| spin_unlock_bh(&mvm->time_event_lock); |
| } |
| |
| static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, |
| struct iwl_rx_packet *pkt, void *data) |
| { |
| struct iwl_mvm *mvm = |
| container_of(notif_wait, struct iwl_mvm, notif_wait); |
| struct iwl_mvm_time_event_data *te_data = data; |
| struct iwl_time_event_notif *resp; |
| int resp_len = iwl_rx_packet_payload_len(pkt); |
| |
| if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) |
| return true; |
| |
| if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
| IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); |
| return true; |
| } |
| |
| resp = (void *)pkt->data; |
| |
| /* te_data->uid is already set in the TIME_EVENT_CMD response */ |
| if (le32_to_cpu(resp->unique_id) != te_data->uid) |
| return false; |
| |
| IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", |
| te_data->uid); |
| if (!resp->status) |
| IWL_ERR(mvm, |
| "TIME_EVENT_NOTIFICATION received but not executed\n"); |
| |
| return true; |
| } |
| |
| static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, |
| struct iwl_rx_packet *pkt, void *data) |
| { |
| struct iwl_mvm *mvm = |
| container_of(notif_wait, struct iwl_mvm, notif_wait); |
| struct iwl_mvm_time_event_data *te_data = data; |
| struct iwl_time_event_resp *resp; |
| int resp_len = iwl_rx_packet_payload_len(pkt); |
| |
| if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) |
| return true; |
| |
| if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { |
| IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); |
| return true; |
| } |
| |
| resp = (void *)pkt->data; |
| |
| /* we should never get a response to another TIME_EVENT_CMD here */ |
| if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) |
| return false; |
| |
| te_data->uid = le32_to_cpu(resp->unique_id); |
| IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", |
| te_data->uid); |
| return true; |
| } |
| |
| static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| struct iwl_mvm_time_event_data *te_data, |
| struct iwl_time_event_cmd *te_cmd) |
| { |
| static const u8 time_event_response[] = { TIME_EVENT_CMD }; |
| struct iwl_notification_wait wait_time_event; |
| int ret; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", |
| le32_to_cpu(te_cmd->duration)); |
| |
| spin_lock_bh(&mvm->time_event_lock); |
| if (WARN_ON(te_data->id != TE_MAX)) { |
| spin_unlock_bh(&mvm->time_event_lock); |
| return -EIO; |
| } |
| te_data->vif = vif; |
| te_data->duration = le32_to_cpu(te_cmd->duration); |
| te_data->id = le32_to_cpu(te_cmd->id); |
| list_add_tail(&te_data->list, &mvm->time_event_list); |
| spin_unlock_bh(&mvm->time_event_lock); |
| |
| /* |
| * Use a notification wait, which really just processes the |
| * command response and doesn't wait for anything, in order |
| * to be able to process the response and get the UID inside |
| * the RX path. Using CMD_WANT_SKB doesn't work because it |
| * stores the buffer and then wakes up this thread, by which |
| * time another notification (that the time event started) |
| * might already be processed unsuccessfully. |
| */ |
| iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, |
| time_event_response, |
| ARRAY_SIZE(time_event_response), |
| iwl_mvm_time_event_response, te_data); |
| |
| ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
| sizeof(*te_cmd), te_cmd); |
| if (ret) { |
| IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); |
| iwl_remove_notification(&mvm->notif_wait, &wait_time_event); |
| goto out_clear_te; |
| } |
| |
| /* No need to wait for anything, so just pass 1 (0 isn't valid) */ |
| ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); |
| /* should never fail */ |
| WARN_ON_ONCE(ret); |
| |
| if (ret) { |
| out_clear_te: |
| spin_lock_bh(&mvm->time_event_lock); |
| iwl_mvm_te_clear_data(mvm, te_data); |
| spin_unlock_bh(&mvm->time_event_lock); |
| } |
| return ret; |
| } |
| |
| void iwl_mvm_protect_session(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| u32 duration, u32 min_duration, |
| u32 max_delay, bool wait_for_notif) |
| { |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; |
| const u8 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; |
| struct iwl_notification_wait wait_te_notif; |
| struct iwl_time_event_cmd time_cmd = {}; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| if (te_data->running && |
| time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { |
| IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", |
| jiffies_to_msecs(te_data->end_jiffies - jiffies)); |
| return; |
| } |
| |
| if (te_data->running) { |
| IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", |
| te_data->uid, |
| jiffies_to_msecs(te_data->end_jiffies - jiffies)); |
| /* |
| * we don't have enough time |
| * cancel the current TE and issue a new one |
| * Of course it would be better to remove the old one only |
| * when the new one is added, but we don't care if we are off |
| * channel for a bit. All we need to do, is not to return |
| * before we actually begin to be on the channel. |
| */ |
| iwl_mvm_stop_session_protection(mvm, vif); |
| } |
| |
| time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
| time_cmd.id_and_color = |
| cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); |
| time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); |
| |
| time_cmd.apply_time = |
| cpu_to_le32(iwl_read_prph(mvm->trans, DEVICE_SYSTEM_TIME_REG)); |
| |
| time_cmd.max_frags = TE_V2_FRAG_NONE; |
| time_cmd.max_delay = cpu_to_le32(max_delay); |
| /* TODO: why do we need to interval = bi if it is not periodic? */ |
| time_cmd.interval = cpu_to_le32(1); |
| time_cmd.duration = cpu_to_le32(duration); |
| time_cmd.repeat = 1; |
| time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | |
| TE_V2_NOTIF_HOST_EVENT_END | |
| T2_V2_START_IMMEDIATELY); |
| |
| if (!wait_for_notif) { |
| iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
| return; |
| } |
| |
| /* |
| * Create notification_wait for the TIME_EVENT_NOTIFICATION to use |
| * right after we send the time event |
| */ |
| iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, |
| te_notif_response, |
| ARRAY_SIZE(te_notif_response), |
| iwl_mvm_te_notif, te_data); |
| |
| /* If TE was sent OK - wait for the notification that started */ |
| if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { |
| IWL_ERR(mvm, "Failed to add TE to protect session\n"); |
| iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); |
| } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, |
| TU_TO_JIFFIES(max_delay))) { |
| IWL_ERR(mvm, "Failed to protect session until TE\n"); |
| } |
| } |
| |
| static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
| struct iwl_mvm_time_event_data *te_data, |
| u32 *uid) |
| { |
| u32 id; |
| |
| /* |
| * It is possible that by the time we got to this point the time |
| * event was already removed. |
| */ |
| spin_lock_bh(&mvm->time_event_lock); |
| |
| /* Save time event uid before clearing its data */ |
| *uid = te_data->uid; |
| id = te_data->id; |
| |
| /* |
| * The clear_data function handles time events that were already removed |
| */ |
| iwl_mvm_te_clear_data(mvm, te_data); |
| spin_unlock_bh(&mvm->time_event_lock); |
| |
| /* |
| * It is possible that by the time we try to remove it, the time event |
| * has already ended and removed. In such a case there is no need to |
| * send a removal command. |
| */ |
| if (id == TE_MAX) { |
| IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* |
| * Explicit request to remove a aux roc time event. The removal of a time |
| * event needs to be synchronized with the flow of a time event's end |
| * notification, which also removes the time event from the op mode |
| * data structures. |
| */ |
| static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, |
| struct iwl_mvm_vif *mvmvif, |
| struct iwl_mvm_time_event_data *te_data) |
| { |
| struct iwl_hs20_roc_req aux_cmd = {}; |
| u32 uid; |
| int ret; |
| |
| if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) |
| return; |
| |
| aux_cmd.event_unique_id = cpu_to_le32(uid); |
| aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); |
| aux_cmd.id_and_color = |
| cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); |
| IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", |
| le32_to_cpu(aux_cmd.event_unique_id)); |
| ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, |
| sizeof(aux_cmd), &aux_cmd); |
| |
| if (WARN_ON(ret)) |
| return; |
| } |
| |
| /* |
| * Explicit request to remove a time event. The removal of a time event needs to |
| * be synchronized with the flow of a time event's end notification, which also |
| * removes the time event from the op mode data structures. |
| */ |
| void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
| struct iwl_mvm_vif *mvmvif, |
| struct iwl_mvm_time_event_data *te_data) |
| { |
| struct iwl_time_event_cmd time_cmd = {}; |
| u32 uid; |
| int ret; |
| |
| if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) |
| return; |
| |
| /* When we remove a TE, the UID is to be set in the id field */ |
| time_cmd.id = cpu_to_le32(uid); |
| time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); |
| time_cmd.id_and_color = |
| cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); |
| |
| IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); |
| ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, |
| sizeof(time_cmd), &time_cmd); |
| if (WARN_ON(ret)) |
| return; |
| } |
| |
| void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif) |
| { |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; |
| |
| lockdep_assert_held(&mvm->mutex); |
| iwl_mvm_remove_time_event(mvm, mvmvif, te_data); |
| } |
| |
| int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
| int duration, enum ieee80211_roc_type type) |
| { |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; |
| struct iwl_time_event_cmd time_cmd = {}; |
| |
| lockdep_assert_held(&mvm->mutex); |
| if (te_data->running) { |
| IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); |
| return -EBUSY; |
| } |
| |
| /* |
| * Flush the done work, just in case it's still pending, so that |
| * the work it does can complete and we can accept new frames. |
| */ |
| flush_work(&mvm->roc_done_wk); |
| |
| time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
| time_cmd.id_and_color = |
| cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); |
| |
| switch (type) { |
| case IEEE80211_ROC_TYPE_NORMAL: |
| time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); |
| break; |
| case IEEE80211_ROC_TYPE_MGMT_TX: |
| time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); |
| break; |
| default: |
| WARN_ONCE(1, "Got an invalid ROC type\n"); |
| return -EINVAL; |
| } |
| |
| time_cmd.apply_time = cpu_to_le32(0); |
| time_cmd.interval = cpu_to_le32(1); |
| |
| /* |
| * The P2P Device TEs can have lower priority than other events |
| * that are being scheduled by the driver/fw, and thus it might not be |
| * scheduled. To improve the chances of it being scheduled, allow them |
| * to be fragmented, and in addition allow them to be delayed. |
| */ |
| time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); |
| time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); |
| time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); |
| time_cmd.repeat = 1; |
| time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | |
| TE_V2_NOTIF_HOST_EVENT_END | |
| T2_V2_START_IMMEDIATELY); |
| |
| return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
| } |
| |
| void iwl_mvm_stop_roc(struct iwl_mvm *mvm) |
| { |
| struct iwl_mvm_vif *mvmvif = NULL; |
| struct iwl_mvm_time_event_data *te_data; |
| bool is_p2p = false; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| spin_lock_bh(&mvm->time_event_lock); |
| |
| /* |
| * Iterate over the list of time events and find the time event that is |
| * associated with a P2P_DEVICE interface. |
| * This assumes that a P2P_DEVICE interface can have only a single time |
| * event at any given time and this time event coresponds to a ROC |
| * request |
| */ |
| list_for_each_entry(te_data, &mvm->time_event_list, list) { |
| if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { |
| mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
| is_p2p = true; |
| goto remove_te; |
| } |
| } |
| |
| /* There can only be at most one AUX ROC time event, we just use the |
| * list to simplify/unify code. Remove it if it exists. |
| */ |
| te_data = list_first_entry_or_null(&mvm->aux_roc_te_list, |
| struct iwl_mvm_time_event_data, |
| list); |
| if (te_data) |
| mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); |
| |
| remove_te: |
| spin_unlock_bh(&mvm->time_event_lock); |
| |
| if (!mvmvif) { |
| IWL_WARN(mvm, "No remain on channel event\n"); |
| return; |
| } |
| |
| if (is_p2p) |
| iwl_mvm_remove_time_event(mvm, mvmvif, te_data); |
| else |
| iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); |
| |
| iwl_mvm_roc_finished(mvm); |
| } |
| |
| int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| u32 duration, u32 apply_time) |
| { |
| struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
| struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; |
| struct iwl_time_event_cmd time_cmd = {}; |
| |
| lockdep_assert_held(&mvm->mutex); |
| |
| if (te_data->running) { |
| IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); |
| return -EBUSY; |
| } |
| |
| time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); |
| time_cmd.id_and_color = |
| cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); |
| time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); |
| time_cmd.apply_time = cpu_to_le32(apply_time); |
| time_cmd.max_frags = TE_V2_FRAG_NONE; |
| time_cmd.duration = cpu_to_le32(duration); |
| time_cmd.repeat = 1; |
| time_cmd.interval = cpu_to_le32(1); |
| time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | |
| TE_V2_ABSENCE); |
| |
| return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); |
| } |