linux.git/drivers/net/wireless/ralink, branch v6.8

wifi: rt2x00: remove useless code in rt2x00queue_create_tx_descriptor()

2023-12-15T13:40:26+00:00

In 'rt2x00queue_create_tx_descriptor()', there is no need to call
'ieee80211_get_rts_cts_rate()' while checking for RTS/CTS frame
since this function returns NULL or pointer to internal bitrate
table entry, and the return value is not actually used. Compile
tested only.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Dmitry Antipov 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://msgid.link/20231213051449.126963-1-dmantipov@yandex.ru

wifi: rt2x00: make watchdog param per device

2023-12-01T12:42:14+00:00

We can run PCI/MMIO devices together with USB devices in the system.
Make watchdog parameter per device to avoid situation when plugin
USB device change modparam_watchdog for PCI/MMIO device.

Signed-off-by: Stanislaw Gruszka 
Tested-by: Shiji Yang 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/20231126195358.500259-1-stf_xl@wp.pl

wifi: rt2x00: Simplify bool conversion

2023-11-30T19:16:37+00:00

./drivers/net/wireless/ralink/rt2x00/rt2800lib.c:1331:47-52: WARNING: conversion to bool not needed here
./drivers/net/wireless/ralink/rt2x00/rt2800lib.c:1332:47-52: WARNING: conversion to bool not needed here

Reported-by: Abaci Robot 
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=7531
Signed-off-by: Yang Li 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/20231115010017.112081-1-yang.lee@linux.alibaba.com

wifi: rt2x00: correct wrong BBP register in RxDCOC calibration

2023-11-14T10:18:11+00:00

Refer to Mediatek vendor driver RxDCOC_Calibration() function, when
performing gainfreeze calibration, we should write register 140
instead of 141. This fix can reduce the total calibration time from
6 seconds to 1 second.

Signed-off-by: Shiji Yang 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/TYAP286MB0315B13B89DF57B6B27BB854BCAFA@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM

wifi: rt2x00: restart beacon queue when hardware reset

2023-11-08T18:14:10+00:00

When a hardware reset is triggered, all registers are reset, so all
queues are forced to stop in hardware interface. However, mac80211
will not automatically stop the queue. If we don't manually stop the
beacon queue, the queue will be deadlocked and unable to start again.
This patch fixes the issue where Apple devices cannot connect to the
AP after calling ieee80211_restart_hw().

Signed-off-by: Shiji Yang 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/TYAP286MB031530EB6D98DCE4DF20766CBCA4A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM

wifi: rt2x00: disable RTS threshold for rt2800 by default

2023-11-08T18:14:10+00:00

rt2800 has a lot of registers to control the RTS enable/disable
status for different rates. And the driver control them via
rt2800_set_rts_threshold(). When RTS was disabled in user
interface, this function won't be called at all. This means that
the RTS is still 'on' for CCK and OFDM rates. So we'd better to
disable them by default because it should be like this. The RTS
for HT20 and HT40 is already default off so we don't need to
touch them. If we toggle the RTS status, these register bits
will be enable/disable again by rt2800_set_rts_threshold().

Signed-off-by: Shiji Yang 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/TYAP286MB03155DDB953155B7A2DE849ABCA4A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM

wifi: rt2x00: introduce DMA busy check watchdog for rt2800

2023-11-08T18:14:10+00:00

When I tried to fix the watchdog of rt2800, I found that sometimes
the watchdog can not reset the hung device. This is because the
queue is not completely stuck, it just becomes very slow. The MTK
vendor driver for the new chip MT7603/MT7612 has a DMA busy watchdog
to detect device hangs by checking DMA busy status. This watchdog
implementation is something similar to it. To reduce unnecessary
reset, we can check the INT_SOURCE_CSR register together as I found
that when the radio hung, the RX/TX coherent interrupt will always
stuck at triggered state.

The 'watchdog' module parameter has been extended to control all
watchdogs(0=disabled, 1=hang watchdog, 2=DMA watchdog, 3=both). This
new watchdog function is a slight schedule and it won't affect the
transmission speed. So we can turn on it by default. Due to the
INT_SOURCE_CSR register is invalid on rt2800 USB NICs, the DMA busy
watchdog will be automatically disabled for them.

Tested on MT7620 and RT5350.

Signed-off-by: Shiji Yang 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/TYAP286MB0315D7462CE08A119A99DE34BCA4A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM

wifi: rt2x00: rework MT7620 PA/LNA RF calibration

2023-10-25T09:06:16+00:00

1. Move MT7620 PA/LNA calibration code to dedicated functions.
2. For external PA/LNA devices, restore RF and BBP registers before
   R-Calibration.
3. Do Rx DCOC calibration again before RXIQ calibration.
4. Add some missing LNA related registers' initialization.

Signed-off-by: Shiji Yang 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/TYAP286MB0315979F92DC563019B8F238BCD4A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM

wifi: rt2x00: rework MT7620 channel config function

2023-10-25T09:06:15+00:00

1. Move the channel configuration code from rt2800_vco_calibration()
   to the rt2800_config_channel().
2. Use MT7620 SoC specific AGC initial LNA value instead of the
   RT5592's value.
3. BBP{195,196} pairing write has been replaced with
   rt2800_bbp_glrt_write() to reduce redundant code.

Signed-off-by: Shiji Yang 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/TYAP286MB0315622A4340BFFA530B1B86BCD4A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM

wifi: rt2x00: improve MT7620 register initialization

2023-10-25T09:06:15+00:00

1. Do not hard reset the BBP. We can use soft reset instead. This
   change has some help to the calibration failure issue.
2. Enable falling back to legacy rate from the HT/RTS rate by
   setting the HT_FBK_TO_LEGACY register.
3. Implement MCS rate specific maximum PSDU size. It can improve
   the transmission quality under the low RSSI condition.
4. Set BBP_84 register value to 0x19. This is used for extension
   channel overlapping IOT.

Signed-off-by: Shiji Yang 
Acked-by: Stanislaw Gruszka 
Signed-off-by: Kalle Valo 
Link: https://lore.kernel.org/r/TYAP286MB031553CCD4B7A3B89C85935DBCD4A@TYAP286MB0315.JPNP286.PROD.OUTLOOK.COM