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linux/drivers/net/wireless/silabs/wfx/scan.h

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staging: wfx: allow to scan networks Chip can make foreground scan or background, but both can't be mixed in same request. So, we need to split each mac80211 requests into multiple HIF requests. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-19-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-19 14:25:47 +00:00
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Scan related functions.
*
staging: wfx: update copyrights dates Most of the files have been modified in 2020, so update the copyright notices. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20201007101943.749898-6-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-10-07 12:19:41 +02:00
* Copyright (c) 2017-2020, Silicon Laboratories, Inc.
staging: wfx: allow to scan networks Chip can make foreground scan or background, but both can't be mixed in same request. So, we need to split each mac80211 requests into multiple HIF requests. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-19-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-19 14:25:47 +00:00
* Copyright (c) 2010, ST-Ericsson
*/
#ifndef WFX_SCAN_H
#define WFX_SCAN_H
Revert "staging: wfx: remove unused included header files" This reverts commit 314fd52f01ead9528a5cda5a868425bb736d93a2. It turns .h files into non-stand-alone when building, which might cause problems in the long-run. Reported-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Cc: Muhammad Usama Anjum <musamaanjum@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-03-09 15:51:56 +01:00
#include <net/mac80211.h>
staging: wfx: allow to scan networks Chip can make foreground scan or background, but both can't be mixed in same request. So, we need to split each mac80211 requests into multiple HIF requests. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-19-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-19 14:25:47 +00:00
struct wfx_dev;
struct wfx_vif;
staging: wfx: workaround bug with "iw scan" mac80211 specification does not forbid hw_scan() to call ieee80211_scan_completed(). However, from userspace point of view, not all applications support this behavior. In particular, the code of iw contains a big fat warning: /* * This code has a bug, which requires creating a separate * nl80211 socket to fix: * It is possible for a NL80211_CMD_NEW_SCAN_RESULTS or * NL80211_CMD_SCAN_ABORTED message to be sent by the kernel * before (!) we listen to it, because we only start listening * after we send our scan request. [...] * Alas, the kernel doesn't do that (yet). */ So, we have to avoid to call ieee80211_scan_completed() from hw_scan() (it's a kind of unwritten rule). This patch relocates the hw_scan() process to a work_struct to fix the problem. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191217161318.31402-52-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-17 16:15:37 +00:00
void wfx_hw_scan_work(struct work_struct *work);
staging: wfx: allow to scan networks Chip can make foreground scan or background, but both can't be mixed in same request. So, we need to split each mac80211 requests into multiple HIF requests. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-19-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-19 14:25:47 +00:00
int wfx_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_scan_request *req);
staging: wfx: implement cancel_hw_scan() The device provides an API to abort a scan request. Expose this feature to mac80211. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191217161318.31402-55-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-17 16:15:41 +00:00
void wfx_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
staging: wfx: avoid possible lock-up during scan If the environment is noisy, the device may take time to send scan requests. Thus, scan requests durations > 5s have already been observed. During the scan, traffic is neither received, neither sent. From the user point-of-view, the traffic is frozen for a long time. This patch reworks the scan processing. It gives to the device a smaller time budget than previously. However, it does not expect the scan to be complete and it is able to send another scan request to finish the work. A big part of the patch aims to avoid an infinite loop if the device goes crazy. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20210913130203.1903622-6-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-13 15:01:36 +02:00
void wfx_scan_complete(struct wfx_vif *wvif, int nb_chan_done);
staging: wfx: allow to scan networks Chip can make foreground scan or background, but both can't be mixed in same request. So, we need to split each mac80211 requests into multiple HIF requests. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-19-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-19 14:25:47 +00:00
wifi: wfx: implement wfx_remain_on_channel() With some conditions, the device is able to send/receive frames during scan operation. So, it is possible to use it implement the "remain on channel" feature. We just ask for a passive scan (without sending any probe request) on one channel. This architecture allows to leverage some interesting features: - if the device is AP, the device switches channel just after the next beacon and the beacons are stopped during the off-channel interval. - if the device is connected, it advertises it is asleep before to switch channel (so the AP should stop to try to send data) Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20231004172843.195332-9-jerome.pouiller@silabs.com
2023-10-04 19:28:43 +02:00
void wfx_remain_on_channel_work(struct work_struct *work);
int wfx_remain_on_channel(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_channel *chan, int duration,
enum ieee80211_roc_type type);
int wfx_cancel_remain_on_channel(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
staging: wfx: remove useless comments after #endif Comments after the last #endif of header files don't bring any information and are redundant with the name of the file. Drop them. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20210913130203.1903622-30-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-13 15:02:00 +02:00
#endif
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