kernel/git/stable/linux.git/include/net/mac80211.h, branch linux-5.7.y

mac80211: populate debugfs only after cfg80211 init

2020-04-24T09:30:13+00:00

When fixing the initialization race, we neglected to account for the fact that debugfs is initialized in wiphy_register(), and some debugfs things went missing (or rather were rerooted to the global debugfs root). Fix this by adding debugfs entries only after wiphy_register(). This requires some changes in the rate control code since it currently adds debugfs at alloc time, which can no longer be done after the reordering. Reported-by: Jouni Malinen Reported-by: kernel test robot Reported-by: Hauke Mehrtens Reported-by: Felix Fietkau Cc: stable@vger.kernel.org Fixes: 52e04b4ce5d0 ("mac80211: fix race in ieee80211_register_hw()") Signed-off-by: Johannes Berg Acked-by: Sumit Garg Link: https://lore.kernel.org/r/20200423111344.0e00d3346f12.Iadc76a03a55093d94391fc672e996a458702875d@changeid Signed-off-by: Johannes Berg

mac80211: update documentation about tx power

2020-03-20T13:42:19+00:00

The structure member added at some point, but the kernel-doc was not updated. Signed-off-by: Qiujun Huang Link: https://lore.kernel.org/r/20200312144424.3023-1-hqjagain@gmail.com Signed-off-by: Johannes Berg

mac80211: Add api to support configuring TID specific configuration

2020-02-24T13:07:01+00:00

Implement drv_set_tid_config api to allow TID specific configuration and drv_reset_tid_config api to reset peer specific TID configuration. This per-TID onfiguration will be applied for all the connected stations when MAC is NULL. Signed-off-by: Tamizh chelvam Link: https://lore.kernel.org/r/1579506687-18296-7-git-send-email-tamizhr@codeaurora.org Signed-off-by: Johannes Berg

Merge tag 'mac80211-next-for-net-next-2020-02-14' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

2020-02-17T03:00:22+00:00

Johannes Berg says: ==================== A few big new things: * 802.11 frame encapsulation offload support * more HE (802.11ax) support, including some for 6 GHz band * powersave in hwsim, for better testing Of course as usual there are various cleanups and small fixes. ==================== Signed-off-by: David S. Miller

mac80211: Fix setting txpower to zero

2020-02-14T08:57:00+00:00

With multiple VIFS ath10k, and probably others, tries to find the minimum txpower for all vifs and uses that when setting txpower in the firmware. If a second vif is added and starts to scan, it's txpower is not initialized yet and it set to zero. ath10k had a patch to ignore zero values, but then it is impossible to actually set txpower to zero. So, instead initialize the txpower to INT_MIN in mac80211, and let drivers know that means the power has not been set and so should be ignored. This should fix regression in: commit 88407beb1b1462f706a1950a355fd086e1c450b6 Author: Ryan Hsu Date: Tue Dec 13 14:55:19 2016 -0800 ath10k: fix incorrect txpower set by P2P_DEVICE interface Tested on ath10k 9984 with ath10k-ct firmware. Signed-off-by: Ben Greear Link: https://lore.kernel.org/r/20191217183057.24586-1-greearb@candelatech.com Signed-off-by: Johannes Berg

mac80211: use more bits for ack_frame_id

2020-02-07T10:32:27+00:00

It turns out that this wasn't a good idea, I hit a test failure in hwsim due to this. That particular failure was easily worked around, but it raised questions: if an AP needs to, for example, send action frames to each connected station, the current limit is nowhere near enough (especially if those stations are sleeping and the frames are queued for a while.) Shuffle around some bits to make more room for ack_frame_id to allow up to 8192 queued up frames, that's enough for queueing 4 frames to each connected station, even at the maximum of 2007 stations on a single AP. We take the bits from band (which currently only 2 but I leave 3 in case we add another band) and from the hw_queue, which can only need 4 since it has a limit of 16 queues. Fixes: 6912daed05e1 ("mac80211: Shrink the size of ack_frame_id to make room for tx_time_est") Signed-off-by: Johannes Berg Acked-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/r/20200115122549.b9a4ef9f4980.Ied52ed90150220b83a280009c590b65d125d087c@changeid Signed-off-by: Johannes Berg

mac80211: add handling for BSS color

2020-01-15T10:18:50+00:00

It is now possible to propagate BSS color settings into the subsystem. Lets make mac80211 also handle them so that we can send them further down the stack into the drivers. We drop the old bss_color field and change iwlwifi to use the new he_bss_color struct. Signed-off-by: John Crispin Link: https://lore.kernel.org/r/20191217141921.8114-2-john@phrozen.org Signed-off-by: Johannes Berg

mac80211: add 802.11 encapsulation offloading support

2019-12-13T19:02:36+00:00

This patch adds a new transmit path for hardware that supports 802.11 encapsulation offloading. In those cases 802.3 frames get passed directly to the driver allowing the hardware to handle the encapsulation. Some features such as monitor mode and TKIP would break when encapsulation offloading is enabled. If any of these get enabled, the code will alwyas fallback to the normal sw encapsulation data path. The patch defines a secondary netdev_ops struct that the device gets assigned if 802.11 encap support is available and enabled. The driver needs to enable the support on a per vif basis if it finds that all pre-reqs are meet. Signed-off-by: Vasanthakumar Thiagarajan Signed-off-by: John Crispin Link: https://lore.kernel.org/r/20191125100438.16539-1-john@phrozen.org [reword comments, remove SUPPORTS_80211_ENCAP HW flag, minor cleanups] Signed-off-by: Johannes Berg

mac80211: Use Airtime-based Queue Limits (AQL) on packet dequeue

2019-11-22T12:36:25+00:00

The previous commit added the ability to throttle stations when they queue too much airtime in the hardware. This commit enables the functionality by calculating the expected airtime usage of each packet that is dequeued from the TXQs in mac80211, and accounting that as pending airtime. The estimated airtime for each skb is stored in the tx_info, so we can subtract the same amount from the running total when the skb is freed or recycled. The throttling mechanism relies on this accounting to be accurate (i.e., that we are not freeing skbs without subtracting any airtime they were accounted for), so we put the subtraction into ieee80211_report_used_skb(). As an optimisation, we also subtract the airtime on regular TX completion, zeroing out the value stored in the packet afterwards, to avoid having to do an expensive lookup of the station from the packet data on every packet. This patch does *not* include any mechanism to wake a throttled TXQ again, on the assumption that this will happen anyway as a side effect of whatever freed the skb (most commonly a TX completion). Signed-off-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/r/20191119060610.76681-5-kyan@google.com Signed-off-by: Johannes Berg

mac80211: Implement Airtime-based Queue Limit (AQL)

2019-11-22T12:36:25+00:00

In order for the Fq_CoDel algorithm integrated in mac80211 layer to operate effectively to control excessive queueing latency, the CoDel algorithm requires an accurate measure of how long packets stays in the queue, AKA sojourn time. The sojourn time measured at the mac80211 layer doesn't include queueing latency in the lower layer (firmware/hardware) and CoDel expects lower layer to have a short queue. However, most 802.11ac chipsets offload tasks such TX aggregation to firmware or hardware, thus have a deep lower layer queue. Without a mechanism to control the lower layer queue size, packets only stay in mac80211 layer transiently before being sent to firmware queue. As a result, the sojourn time measured by CoDel in the mac80211 layer is almost always lower than the CoDel latency target, hence CoDel does little to control the latency, even when the lower layer queue causes excessive latency. The Byte Queue Limits (BQL) mechanism is commonly used to address the similar issue with wired network interface. However, this method cannot be applied directly to the wireless network interface. "Bytes" is not a suitable measure of queue depth in the wireless network, as the data rate can vary dramatically from station to station in the same network, from a few Mbps to over Gbps. This patch implements an Airtime-based Queue Limit (AQL) to make CoDel work effectively with wireless drivers that utilized firmware/hardware offloading. AQL allows each txq to release just enough packets to the lower layer to form 1-2 large aggregations to keep hardware fully utilized and retains the rest of the frames in mac80211 layer to be controlled by the CoDel algorithm. Signed-off-by: Kan Yan [ Toke: Keep API to set pending airtime internal, fix nits in commit msg ] Signed-off-by: Toke Høiland-Jørgensen Link: https://lore.kernel.org/r/20191119060610.76681-4-kyan@google.com Signed-off-by: Johannes Berg