leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cfg80211: implement APIs for dedicated radar detection HW

Browse Source 
If a dedicated (off-channel) radar detection hardware (chain)
is available in the hardware/driver, allow this to be used by
calling the NL80211_CMD_RADAR_DETECT command with a new flag
attribute requesting off-channel radar detection is used.

Offchannel CAC (channel availability check) avoids the CAC
downtime when switching to a radar channel or when turning on
the AP.

Drivers advertise support for this using the new feature flag
NL80211_EXT_FEATURE_RADAR_OFFCHAN.

Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/7468e291ef5d05d692c1738d25b8f778d8ea5c3f.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/1e60e60fef00e14401adae81c3d49f3e5f307537.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/85fa50f57fc3adb2934c8d9ca0be30394de6b7e8.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/4b6c08671ad59aae0ac46fc94c02f31b1610eb72.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/241849ccaf2c228873c6f8495bf87b19159ba458.1634979655.git.lorenzo@kernel.org
[remove offchan_mutex, fix cfg80211_stop_offchan_radar_detection(),
 remove gfp_t argument, fix documentation, fix tracing]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Lorenzo Bianconi
2021-10-23 11:10:50 +02:00
committed by Johannes Berg
parent 3b1abcf128
commit bc2dfc0283
8 changed files with 214 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
include/uapi/linux/nl80211.h
View File

@@ -2639,6 +2639,13 @@ enum nl80211_commands {
* Mandatory parameter for the transmitting interface to enable MBSSID.
* Optional for the non-transmitting interfaces.
*
* @NL80211_ATTR_RADAR_OFFCHAN: Configure dedicated offchannel chain available for
* radar/CAC detection on some hw. This chain can't be used to transmit
* or receive frames and it is bounded to a running wdev.
* Offchannel radar/CAC detection allows to avoid the CAC downtime
* switching on a different channel during CAC detection on the selected
* radar channel.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@@ -3145,6 +3152,8 @@ enum nl80211_attrs {
NL80211_ATTR_MBSSID_CONFIG,
NL80211_ATTR_MBSSID_ELEMS,
NL80211_ATTR_RADAR_OFFCHAN,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -6051,6 +6060,9 @@ enum nl80211_feature_flags {
* frames. Userspace has to share FILS AAD details to the driver by using
* @NL80211_CMD_SET_FILS_AAD.
*
* @NL80211_EXT_FEATURE_RADAR_OFFCHAN: Device supports offchannel radar/CAC
* detection.
*
* @NUM_NL80211_EXT_FEATURES: number of extended features.
* @MAX_NL80211_EXT_FEATURES: highest extended feature index.
*/
@@ -6117,6 +6129,7 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_PROT_RANGE_NEGO_AND_MEASURE,
NL80211_EXT_FEATURE_BSS_COLOR,
NL80211_EXT_FEATURE_FILS_CRYPTO_OFFLOAD,
NL80211_EXT_FEATURE_RADAR_OFFCHAN,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,