aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/mvm/time-event.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/time-event.h')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/time-event.h214
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/time-event.h b/drivers/net/wireless/iwlwifi/mvm/time-event.h
new file mode 100644
index 00000000000..64fb57a5ab4
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/mvm/time-event.h
@@ -0,0 +1,214 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license. When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called LICENSE.GPL.
+ *
+ * Contact Information:
+ * Intel Linux Wireless <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.
+ *
+ *****************************************************************************/
+
+#ifndef __time_event_h__
+#define __time_event_h__
+
+#include "fw-api.h"
+
+#include "mvm.h"
+
+/**
+ * DOC: Time Events - what is it?
+ *
+ * Time Events are a fw feature that allows the driver to control the presence
+ * of the device on the channel. Since the fw supports multiple channels
+ * concurrently, the fw may choose to jump to another channel at any time.
+ * In order to make sure that the fw is on a specific channel at a certain time
+ * and for a certain duration, the driver needs to issue a time event.
+ *
+ * The simplest example is for BSS association. The driver issues a time event,
+ * waits for it to start, and only then tells mac80211 that we can start the
+ * association. This way, we make sure that the association will be done
+ * smoothly and won't be interrupted by channel switch decided within the fw.
+ */
+
+ /**
+ * DOC: The flow against the fw
+ *
+ * When the driver needs to make sure we are in a certain channel, at a certain
+ * time and for a certain duration, it sends a Time Event. The flow against the
+ * fw goes like this:
+ * 1) Driver sends a TIME_EVENT_CMD to the fw
+ * 2) Driver gets the response for that command. This response contains the
+ * Unique ID (UID) of the event.
+ * 3) The fw sends notification when the event starts.
+ *
+ * Of course the API provides various options that allow to cover parameters
+ * of the flow.
+ * What is the duration of the event?
+ * What is the start time of the event?
+ * Is there an end-time for the event?
+ * How much can the event be delayed?
+ * Can the event be split?
+ * If yes what is the maximal number of chunks?
+ * etc...
+ */
+
+/**
+ * DOC: Abstraction to the driver
+ *
+ * In order to simplify the use of time events to the rest of the driver,
+ * we abstract the use of time events. This component provides the functions
+ * needed by the driver.
+ */
+
+#define IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS 500
+#define IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS 400
+
+/**
+ * iwl_mvm_protect_session - start / extend the session protection.
+ * @mvm: the mvm component
+ * @vif: the virtual interface for which the session is issued
+ * @duration: the duration of the session in TU.
+ * @min_duration: will start a new session if the current session will end
+ * in less than min_duration.
+ *
+ * This function can be used to start a session protection which means that the
+ * fw will stay on the channel for %duration_ms milliseconds. This function
+ * will block (sleep) until the session starts. This function can also be used
+ * to extend a currently running session.
+ * This function is meant to be used for BSS association for example, where we
+ * want to make sure that the fw stays on the channel during the association.
+ */
+void iwl_mvm_protect_session(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif,
+ u32 duration, u32 min_duration);
+
+/**
+ * iwl_mvm_stop_session_protection - cancel the session protection.
+ * @mvm: the mvm component
+ * @vif: the virtual interface for which the session is issued
+ *
+ * This functions cancels the session protection which is an act of good
+ * citizenship. If it is not needed any more it should be cancelled because
+ * the other bindings wait for the medium during that time.
+ * This funtions doesn't sleep.
+ */
+void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif);
+
+/*
+ * iwl_mvm_rx_time_event_notif - handles %TIME_EVENT_NOTIFICATION.
+ */
+int iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm,
+ struct iwl_rx_cmd_buffer *rxb,
+ struct iwl_device_cmd *cmd);
+
+/**
+ * iwl_mvm_start_p2p_roc - start remain on channel for p2p device functionlity
+ * @mvm: the mvm component
+ * @vif: the virtual interface for which the roc is requested. It is assumed
+ * that the vif type is NL80211_IFTYPE_P2P_DEVICE
+ * @duration: the requested duration in millisecond for the fw to be on the
+ * channel that is bound to the vif.
+ *
+ * This function can be used to issue a remain on channel session,
+ * which means that the fw will stay in the channel for the request %duration
+ * milliseconds. The function is async, meaning that it only issues the ROC
+ * request but does not wait for it to start. Once the FW is ready to serve the
+ * ROC request, it will issue a notification to the driver that it is on the
+ * requested channel. Once the FW completes the ROC request it will issue
+ * another notification to the driver.
+ */
+int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
+ int duration);
+
+/**
+ * iwl_mvm_stop_p2p_roc - stop remain on channel for p2p device functionlity
+ * @mvm: the mvm component
+ *
+ * This function can be used to cancel an ongoing ROC session.
+ * The function is async, it will instruct the FW to stop serving the ROC
+ * session, but will not wait for the actual stopping of the session.
+ */
+void iwl_mvm_stop_p2p_roc(struct iwl_mvm *mvm);
+
+/**
+ * iwl_mvm_remove_time_event - general function to clean up of time event
+ * @mvm: the mvm component
+ * @vif: the vif to which the time event belongs
+ * @te_data: the time event data that corresponds to that time event
+ *
+ * This function can be used to cancel a time event regardless its type.
+ * It is useful for cleaning up time events running before removing an
+ * interface.
+ */
+void iwl_mvm_remove_time_event(struct iwl_mvm *mvm,
+ struct iwl_mvm_vif *mvmvif,
+ struct iwl_mvm_time_event_data *te_data);
+
+/**
+ * iwl_mvm_te_clear_data - remove time event from list
+ * @mvm: the mvm component
+ * @te_data: the time event data to remove
+ *
+ * This function is mostly internal, it is made available here only
+ * for firmware restart purposes.
+ */
+void iwl_mvm_te_clear_data(struct iwl_mvm *mvm,
+ struct iwl_mvm_time_event_data *te_data);
+
+void iwl_mvm_roc_done_wk(struct work_struct *wk);
+
+#endif /* __time_event_h__ */