mt76_tx() queues frames on wcid->tx_pending for async processing by
tx_worker. In __mt76_set_channel(), the worker gets disabled before it
may have run, and the subsequent wait only checks DMA ring queues, not
the software pending list. This means frames like nullfunc PS frames
from mt76_offchannel_notify() may never be transmitted on the correct
channel.
Fix this by running mt76_txq_schedule_pending() synchronously after
disabling the tx_worker but before setting MT76_RESET, which would
otherwise cause mt76_txq_schedule_pending_wcid() to bail out.
Signed-off-by: Felix Fietkau <[email protected]>
mt76_txq_send_burst does check if the number of non-AQL frames exceeds
the maximum. In this case the queue is returned to ieee80211_return_txq
when iterating over the scheduled TXQs in mt76_txq_schedule_list.
This has the effect of inserting said TXQ at the head of the list. This
means the loop will get the same TXQ again, which will terminate the
scheduling round. TXQs following in the list thus never get scheduled
for transmission.
This can manifest in high latency low throughput or broken connections
for said STAs.
Check if the non-AQL packet count exceeds the limit and not return the
TXQ in this case.
Schedule all TXQs for the STA in case the non-AQL limit can be satisfied
again.
Signed-off-by: David Bauer <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
MediaTek has asked to switch from the ISC license to BSD-3-Clause-Clear,
in order to improve clarity and the legal integrity of the code.
The BSD-3-Clause license includes the "no endorsement" clause, which is
important for protecting the reputation of the original authors and
contributors by preventing unauthorized use of their names for endorsement
purposes.
This clause is absent in the BSD-2-Clause license, which is more permissive
but lacks this specific protection.
This change also cleans up the license of some Kconfig/Makefile files,
which were accidentally marked as GPL.
The GPL 2.0 remains in use on mt76x0, as well as two source files in mt7615
for which the license situation still needs to be clarified.
Signed-off-by: Felix Fietkau <[email protected]>
Never leave scheduled wcid entries on the temporary on-stack list
Fixes: 0b3be9d1d34e ("wifi: mt76: add separate tx scheduling queue for off-channel tx")
Signed-off-by: Felix Fietkau <[email protected]>
Only put probe request packets in the offchannel queue if
IEEE80211_TX_CTRL_DONT_USE_RATE_MASK is set and IEEE80211_TX_CTL_TX_OFFCHAN
is unset.
Fixes: 0b3be9d1d34e ("wifi: mt76: add separate tx scheduling queue for off-channel tx")
Reported-by: Chad Monroe <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Several places use rcu_dereference to get a wcid entry without validating
if the index exceeds the array boundary. Fix this by using a helper function,
which handles validation.
Signed-off-by: Felix Fietkau <[email protected]>
When running in AP mode and deauthenticating a client that's in powersave
mode, the disassoc/deauth packet can get stuck in a tx queue along with
other buffered frames. This can fill up hardware queues with frames
that are only released after the WTBL slot is reused for another client.
Fix this by moving deauth packets to the ALTX queue.
Signed-off-by: Felix Fietkau <[email protected]>
The interrupt status polling is unreliable, which can cause status events
to get lost. On all newer chips, txs-timeout is an indication that the
packet was either never sent, or never acked.
Fixes issues with inactivity polling.
Signed-off-by: Felix Fietkau <[email protected]>
When queueing packets, only the MT76_RESET flag of the primary PHY
is checked. If the primary PHY is scanning or changing channels, this can
lead to packet loss for tx on the second PHY.
Fix this by passing the phy to the .tx_queue_skb op and using it to check
the correct flag.
Signed-off-by: Felix Fietkau <[email protected]>
When drv_tx calls race against local tx scheduling, the queue fill status checks
can potentially race, leading to dma queue entries being overwritten.
Fix this by deferring packets from drv_tx calls to the tx worker, in order to
ensure that all regular queue tx comes from the same context.
Signed-off-by: Felix Fietkau <[email protected]>
AQL relies on accurate tx rate reporting, so add this patch for
non-binding skb rate when WED is enabled.
Co-developed-by: Ryder Lee <[email protected]>
Signed-off-by: Ryder Lee <[email protected]>
Signed-off-by: Peter Chiu <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Concurrent binding/non-binding skbs could be handled anywhere which leads
to mixed byte counting, so switch to use PPDU TxS reporting regardless Tx
paths when WED is active.
Fixes: 43eaa3689507 ("wifi: mt76: add PPDU based TxS support for WED device")
Co-developed-by: Ryder Lee <[email protected]>
Signed-off-by: Ryder Lee <[email protected]>
Signed-off-by: Peter Chiu <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
According to the documentation, ieee80211_rx_list must not run concurrently
with ieee80211_tx_status (or its variants).
Cc: [email protected]
Fixes: 88046b2c9f6d ("mt76: add support for reporting tx status with skb")
Reported-by: Brian Coverstone <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Take into account possible error conditions of mt76_rx_token_consume
routine in mt7915_mmio_wed_init_rx_buf() and mt76_dma_add_buf()
Fixes: cd372b8c99c5 ("wifi: mt76: add WED RX support to mt76_dma_{add,get}_buf")
Fixes: 4f831d18d12d ("wifi: mt76: mt7915: enable WED RX support")
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Report phy_indx in tx_info->hw_queue. This is a preliminary patch to add
newer chipset support
Co-developed-by: Bo Jiao <[email protected]>
Signed-off-by: Bo Jiao <[email protected]>
Signed-off-by: Lorenzo Bianconi <[email protected]>
Introduce phys array in mt76_dev structure to reference mt76_phy
supported by the chipset. This is a preliminary patch to introduce
newer chipset support.
Signed-off-by: Lorenzo Bianconi <[email protected]>
Previously the code used skb_set_queue_mapping for management or non-bufferable
powersave frames that need to be sent to a different hardware queue.
This can confuse AQL, which expects the value to remain the same until the tx
status report.
The only place that currently uses the altered skb queue mapping is the txwi
write function. Change the code to pass the hardware queue id as a function
parameter instead.
Signed-off-by: Felix Fietkau <[email protected]>
There is a small race window where ongoing tx activity can lead to a skb
getting added to the status tracking idr after that idr has already been
cleaned up, which will keep the wcid linked in the status poll list.
Fix this by only adding status skbs if the wcid pointer is still assigned
in dev->wcid, which gets cleared early by mt76_sta_pre_rcu_remove
Fixes: bd1e3e7b693c ("mt76: introduce packet_id idr")
Tested-by: Ben Greear <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
This reverts commit fea36e0207.
When reaching that point, a frame has always been enqueued and we need
to kick the queue
Signed-off-by: Felix Fietkau <[email protected]>
Should keep SKBs only if timeout timestamp is still after jiffies.
Otherwise, report tx status and drop it direclty.
Fixes: bd1e3e7b693c ("mt76: introduce packet_id idr")
Signed-off-by: Deren Wu <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Do not check status timestamp before DMA completion.
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Substitute sk_buff_head status_list with spinlock_t status_lock since we
just need it for locking
Tested-by: [email protected]
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Remove mt76_wcid pointer from mt76_tx_status_check signature since it is
always set to NULL
Tested-by: [email protected]
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Introduce per-wcid idr to manage packet id for txs. This allow fast idr
lookup and skb queueing at the same time.
Tested-by: [email protected]
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Report tx rate from tx status packets instead of receving periodic mcu
event. This improves flexibility, accuracy and AQL performance, and
simplifies code flow for better readability.
Signed-off-by: Ryder Lee <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
In order to remove duplicated code, move mt76_get_next_pkt_id routine
in mt76.h
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Even if this is not a real issue since mt76_tx is never run with wcid set
to NULL, fix a theoretical NULL pointer dereference in mt76_tx routine
Fixes: db9f11d3433f7 ("mt76: store wcid tx rate info in one u32 reduce locking")
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Use ieee80211_tx_status_ext instead of ieee80211_free_skb and
ieee80211_tx_status. This makes it compatible with 802.3 encap offload
and improves performance by removing a redundant sta lookup
Signed-off-by: Felix Fietkau <[email protected]>
In order to remove duplicated code, move mt76_token_init in
mt76_alloc_device routine
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Move token management in mt76 common module since it is shared between
mt7615, mt7915 and mt7921 drivers
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
since tx/rx path is now relying pm ref counting, get rid of MT76_STATE_PM
check in the tx path
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Introduce mt7615_tx_worker routine as mt76 tx worker callback for
mt7663.
Rely on mt76_connac_pm_ref/mt76_connac_pm_unref to check PM state and
increment/decrement wake counter
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Felix Fietkau