There is a typo in debug messages:
- afer -> after
Fix it via codespell.
Signed-off-by: Andrew Kreimer <algonell@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250203180913.5435-1-algonell@gmail.com
Since there are two function features for now, func_bitmap[] has single
one element, which BITMAP_FROM_U64() generating two elements is exceeded.
Change to assign function bitmap barely.
With i386-allmodconfig (a 32 bit system), it throws
>> include/linux/bitmap.h:736:33: warning: excess elements in array initializer
736 | ((unsigned long) ((u64)(n) >> 32))
| ^
drivers/net/wireless/realtek/rtw89/regd.c:16:34: note: in expansion of macro 'BITMAP_FROM_U64'
16 | .func_bitmap = { BITMAP_FROM_U64(_fmap), }, \
| ^~~~~~~~~~~~~~~
drivers/net/wireless/realtek/rtw89/regd.c:20:9: note: in expansion of macro 'COUNTRY_REGD'
20 | COUNTRY_REGD("00", RTW89_WW, RTW89_WW, RTW89_WW, 0x0);
| ^~~~~~~~~~~~
Fixes: 79a36fc56b ("wifi: rtw89: regd: handle supported regulatory functions by country")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202502031932.BMQ4lhJT-lkp@intel.com/
Cc: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250205014051.13765-1-pkshih@realtek.com
The TWS(True wireless stereo) serials Bluetooth audio device need to keep
packet traffic not only with DUT, it also need to synchronize packet with
its assistant earbud. And all the BR/EDR Bluetooth device need to do page
scan to keep re-connect event sensitively between different DUT.
These behavior will make TWS Bluetooth device cost more time slot to keep
the good audio performance. This patch decrease half of Wi-Fi slot(from
40ms to 20ms) in a single cycle. Make the slot more flexible to prevent
audio lag. The single cycle will be shorter, then it will bring some slot
protection cost make Wi-Fi throughput decrease about 5%.
Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250205013233.10945-3-pkshih@realtek.com
If the slot duration is 0, the firmware timer will trigger timer hang at
the timer initializing state in a low rate due to hardware algorithm.
Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250205013233.10945-2-pkshih@realtek.com
A firmeware file contains multi-firmware with a header to represent
contents. The mfw_hdr->fw_nr is to define number of firmware in file.
+-----+-------+------+---------+--------------+
| sig | fw_nr | rsvd | version | reserved |
+---------------------------------------------+ --
fw 0 | cv | type | mp | rsvd | shift | size | rsvd | \
+---------------------------------------------+ |
fw 1 | cv | type | mp | rsvd | shift | size | rsvd | | mfw_hdr->fw_nr
+---------------------------------------------+ |
fw N-1 | ... | /
+=============================================+ --
| fw 0 content |
| (pointed by fw0 shift/size) |
+=============================================+
To avoid Coverity warning, validate header is in range of firmware size,
and also validate the range of actual firmware content is in range.
Addresses-Coverity-ID: 1494046 ("Untrusted loop bound")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250203072911.47313-4-pkshih@realtek.com
Adding beacon BW offset, OP1dB table and rfe_type to lps_ml_cmn_info.
These information will help FW to configure RX more accurately.
Signed-off-by: Eric Huang <echuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250203072911.47313-3-pkshih@realtek.com
Driver selects firmware by hardware version, which normally can be read
from registers before selecting firmware. However, certain chips such as
RTL8851B, it needs to read hardware version from efuse while doing
power_on, but do power_on after selecting firmware in current flow.
To resolve this flow problem, move power_on out from
rtw89_mac_partial_init(), and call rtw89_mac_pwr_on() separately at
proper places to have expected flow.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250203072911.47313-2-pkshih@realtek.com
Occasionally there is an EPROTO error during firmware download.
This error is converted to EAGAIN in the download function.
But nobody tries again and so device probe fails.
Implement download retry to fix this.
This error was observed (and fix tested) on a tbs2910 board [1]
with an embedded RTL8188EU (0bda:8179) device behind a USB hub.
[1] arch/arm/boot/dts/nxp/imx/imx6q-tbs2910.dts
Signed-off-by: Soeren Moch <smoch@web.de>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250127194828.599379-1-smoch@web.de
Some users want to plug two identical USB devices at the same time.
This static variable could theoretically cause them to use incorrect
TX power values.
Move the variable to the caller and pass a pointer to it to
rtw8821c_set_tx_power_index_by_rate().
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/fe42858c-9b9f-4f03-9aaa-737472c2cd90@gmail.com
Some users want to plug two identical USB devices at the same time.
This static variable could theoretically cause them to use incorrect
TX power values.
Move the variable to the caller and pass a pointer to it to
rtw8822b_set_tx_power_index_by_rate().
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/8a60f581-0ab5-4d98-a97d-dd83b605008f@gmail.com
This allows the driver to be used in wireless access point mode on the
AT91SAM9G25-based GARDENA smart Gateway.
Unfortunately, the data throughput in AP mode appears to be lower than
with the vendor driver (or in STA mode). Especially when sending, the
data rate is significantly lower. My measurements performed with iperf3
and an Edimax EW-7811Un (VID: 7392, PID: 7811) showed a maximum TX rate
of about 4 Mbits/sec compared to the ~24 Mbits/sec measured with the
rtl8192cu driver.
Although the performance might be good enough for our use case, this is
something that should be further looked into.
Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122071512.10165-1-ezra@easyb.ch
Except probe/remove flow, the consumers of early_h2c list are interface
start and debugfs. There must be no race between probe/remove flow and
interface start. The failed probe flow is to free early_h2c list as well
as remove flow, at these two moments debugfs doesn't present. Thus, it is
safe to free early_h2c list without held wiphy_lock in these situations.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122060310.31976-11-pkshih@realtek.com
With spatch script, already remove most driver mutex and generate
lockdep_assert_wiphy(), and some are needed to refine manually further to
be expected:
- lockdep_assert_wiphy() always be the first statement in function
- return directly rather than unnecessary goto
- change assert from mutex to wiphy lock, which script can't convert
automatically.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122060310.31976-9-pkshih@realtek.com
If a debugfs entry takes driver mutex now, let it uses
wiphy_locked_debugfs_{read,write}() to take both driver mutex and
wiphy lock. Add rwlock option to support this.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122060310.31976-6-pkshih@realtek.com
Some debufs entries need output buffer over default size 4K. Since reading
of many debugfs entries is to access IO, it costs time to dynamically
re-allocate larger buffer and access IO again and again. Add an option to
specify the size it needs.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122060310.31976-5-pkshih@realtek.com
Since debugfs needs wiphy lock held, wiphy_locked_debugfs_{read,write}()
will be adopted, so implmenet file_ops::read/write along with their
arguments.
For reading part, it needs lots of changes because seq_file is not
suitable for wiphy_locked_debugfs_{read,write}(), so use spatch script
below to convert basically, and manually implement the functions.
@ rule1 @
identifier m;
@@
- seq_printf(m,
+ p += scnprintf(p, end - p,
...)
@ rule2 @
identifier m;
@@
- seq_puts(m,
+ p += scnprintf(p, end - p,
...)
For current version, only 4K buffer to output. To note ourselves, add
ellipsis symbol "..." to trailing if buffer is full. Later, add an option
to specify buffer size needed by a debugfs entry.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122060310.31976-4-pkshih@realtek.com
For certain works protected by driver mutex, use wiphy_work() directly
to have wiphy lock held naturally. Then every this kind of works is
protected by both wiphy lock and driver mutex.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250122060310.31976-3-pkshih@realtek.com
The needed one was moved to rtwvif::roc_work. And, rtwdev::roc_work is
unused. So, remove it.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250120034004.21135-1-pkshih@realtek.com
The regulatory and wiphy setup should be done in rtw89_regd_setup(). And,
what rtw89_regd_init() should do is to initialize target regulatory domain
(regd), if and only if one is programmed in efuse. Since HW is registered
after rtw89_regd_setup() and before rtw89_regd_init(), do not fill fields
of regulatory in rtw89_regd_init(). So, move the regulatory->reg_6ghz_power
assignment into rtw89_regd_setup().
Besides, rtw89_regd_notifier is assigned in rtw89_regd_setup() instead of
rtw89_regd_init(). To reduce confusion, stop passing rtw89_regd_notifier to
rtw89_regd_init(). And, rename rtw89_regd_init() to rtw89_regd_init_hint().
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250120032723.19042-4-pkshih@realtek.com
There are two regulatory functions including TAS (Time Average SAR) and
DAG (Dynamic Antenna Gain) for now. They are used to improve RF behavior.
But, availability depends on country. Extend regd map to record the status
of whether a country allows to enable certain regulatory functions.
Also, extend the handling of loading regd map via FW element for this.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250120032723.19042-3-pkshih@realtek.com
Regd table is a table that we use to describe how to map Realtek RF TX
power settings on different countries. Originally, a common regd table
for all chips is implemented in driver. However, in order to work on all
chips, the common regd table might have some trade-off. So now, there are
also an individual regd table for some chips. And, we support loading it
from FW element.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250120032723.19042-2-pkshih@realtek.com
To have good performance, adjust hardware XTAL to track CFO (carrier
frequency offset). However, there is only one hardware XTAL, so it is not
possible to track on two PHY simultaneously. It also can't track on single
one PHY when two PHY are working, because the adjustment of XTAL will
affect all PHY. Thus, disable CFO track for this case.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250117072828.16728-9-pkshih@realtek.com
The registers of EDCCA log for PHY 1 isn't a simple offset, so define
them accordingly. Then the function use register set to access reports
according to phy_idx.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250117072828.16728-8-pkshih@realtek.com
Dynamic mechanism EDCCA (Energy Detection Clear Channel Assessment) is to
dynamically adjusted to make EDCCA suitable for situations.
Use PHY context to support two PHY.
For the EDCCA log part, registers to report EDCCA for PHY 1 is not a
simple offset from PHY 0, so add them by separate patch.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250117072828.16728-7-pkshih@realtek.com
The ch_info is to record current channel info such as minimum RSSI of
connected stations, and to assist in dynamic mechanisms of DIG and EDCCA.
Move the struct to PHY context, so the dynamic mechanisms can use the info
of the same PHY.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250117072828.16728-6-pkshih@realtek.com
DIG standing for dynamic initial gain is to define RX coverage. Adjust this
value dynamically to gain good RX performance.
Use PHY context to extend DIG algorithm to support two PHY.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250117072828.16728-5-pkshih@realtek.com
The env_monitor is to collect information of current operating channel as
helper to make decision with better hardware parameters to adopt current
environment.
Use PHY context as argument to control PHY accordingly, and use
rtw89_phy_{write32,read32}_idx with phy_idx to access registers.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250117072828.16728-4-pkshih@realtek.com
To support MLO working on PHY 0 and PHY 1, extend existing PHY dynamic
mechanism from PHY 0 to PHY 0/1.
Implement a 2 elements array for two PHY instances, and pass pointer
of each element as argument to existing functions. Then existing algorithm
is kept, unchanged.
Also provide iterate and get function to access PHY context.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250117072828.16728-3-pkshih@realtek.com
Ensures the correct calculation of `cfg_len` prior to the allocation of
the skb in the `rtw89_fw_h2c_scan_offload_be` function, particularly when
the `SCAN_OFFLOAD_BE_V0` firmware feature is enabled. It addresses an
issue where an incorrect skb size might be allocated due to a delayed
setting of `cfg_len`, potentially leading to memory inefficiencies.
By moving the conditional check and assignment of `cfg_len` before skb
allocation, the patch guarantees that `len`, which depends on `cfg_len`,
is accurately computed, ensuring proper skb size and preventing any
unnecessary memory reservation for firmware operations not supporting
beyond the `w8` member of the command data structure.
This correction helps to optimize memory usage and maintain consistent
behavior across different firmware versions.
Fixes: 6ca6b918f2 ("wifi: rtw89: 8922a: Add new fields for scan offload H2C command")
Signed-off-by: Liang Jie <liangjie@lixiang.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250112105144.615474-1-buaajxlj@163.com
With this version, fix Wi-Fi scan/connecting/RF calibration triggered A2DP
sound lag related issues.
Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250110015416.10704-4-pkshih@realtek.com
Wi-Fi connecting process don't need to assign to firmware slot control,
if assign firmware slot control for Wi-Fi connecting event, firmware will
not toggle slots because driver don't tell the slot schedule to firmware.
Wi-Fi connecting event end should also cancel the 4way handshake status.
Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250110015416.10704-3-pkshih@realtek.com
To get a well Wi-Fi RF quality, Wi-Fi need to do RF calibrations. While
Wi-Fi is doing RF calibrations, driver will pause the Bluetooth traffic
to make sure the RF calibration will not be interfered by Bluetooth.
However, if the RF calibrations take too much time, Bluetooth audio
will perform a lag sound. Add a function to make Bluetooth can do
traffic between the individual calibrations to avoid Bluetooth sound
lag. And patch related A2DP coexistence mechanism actions.
Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250110015416.10704-2-pkshih@realtek.com
- bump version strings, by Simon Wunderlich
- Reorder includes for distributed-arp-table.c, by Sven Eckelmann
- Fix translation table change handling, by Remi Pommarel (2 patches)
- Map VID 0 to untagged TT VLAN, by Sven Eckelmann
- Update MAINTAINERS/mailmap e-mail addresses, by the respective authors
(4 patches)
- netlink: reduce duplicate code by returning interfaces,
by Linus Lüssing
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Merge tag 'batadv-next-pullrequest-20250117' of git://git.open-mesh.org/linux-merge
Simon Wunderlich says:
====================
This cleanup patchset includes the following patches:
- bump version strings, by Simon Wunderlich
- Reorder includes for distributed-arp-table.c, by Sven Eckelmann
- Fix translation table change handling, by Remi Pommarel (2 patches)
- Map VID 0 to untagged TT VLAN, by Sven Eckelmann
- Update MAINTAINERS/mailmap e-mail addresses, by the respective authors
(4 patches)
- netlink: reduce duplicate code by returning interfaces,
by Linus Lüssing
* tag 'batadv-next-pullrequest-20250117' of git://git.open-mesh.org/linux-merge:
batman-adv: netlink: reduce duplicate code by returning interfaces
MAINTAINERS: mailmap: add entries for Antonio Quartulli
mailmap: add entries for Sven Eckelmann
mailmap: add entries for Simon Wunderlich
MAINTAINERS: update email address of Marek Linder
batman-adv: Map VID 0 to untagged TT VLAN
batman-adv: Don't keep redundant TT change events
batman-adv: Remove atomic usage for tt.local_changes
batman-adv: Reorder includes for distributed-arp-table.c
batman-adv: Start new development cycle
====================
Link: https://patch.msgid.link/20250117123910.219278-1-sw@simonwunderlich.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Most likely the last "new features" pull request for v6.14 and this is
a bigger one. Multi-Link Operation (MLO) work continues both in stack
in drivers. Few new devices supported and usual fixes all over.
Major changes:
cfg80211
* Emergency Preparedness Communication Services (EPCS) station mode support
mac80211
* an option to filter a sta from being flushed
* some support for RX Operating Mode Indication (OMI) power saving
* support for adding and removing station links for MLO
iwlwifi
* new device ids
* rework firmware error handling and restart
rtw88
* RTL8812A: RFE type 2 support
* LED support
rtw89
* variant info to support RTL8922AE-VS
mt76
* mt7996: single wiphy multiband support (preparation for MLO)
* mt7996: support for more variants
* mt792x: P2P_DEVICE support
* mt7921u: TP-Link TXE50UH support
ath12k
* enable MLO for QCN9274 (although it seems to be broken with dual
band devices)
* MLO radar detection support
* debugfs: transmit buffer OFDMA, AST entry and puncture stats
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Merge tag 'wireless-next-2025-01-17' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next
Kalle Valo says:
====================
wireless-next patches for v6.14
Most likely the last "new features" pull request for v6.14 and this is
a bigger one. Multi-Link Operation (MLO) work continues both in stack
in drivers. Few new devices supported and usual fixes all over.
Major changes:
cfg80211
* Emergency Preparedness Communication Services (EPCS) station mode support
mac80211
* an option to filter a sta from being flushed
* some support for RX Operating Mode Indication (OMI) power saving
* support for adding and removing station links for MLO
iwlwifi
* new device ids
* rework firmware error handling and restart
rtw88
* RTL8812A: RFE type 2 support
* LED support
rtw89
* variant info to support RTL8922AE-VS
mt76
* mt7996: single wiphy multiband support (preparation for MLO)
* mt7996: support for more variants
* mt792x: P2P_DEVICE support
* mt7921u: TP-Link TXE50UH support
ath12k
* enable MLO for QCN9274 (although it seems to be broken with dual
band devices)
* MLO radar detection support
* debugfs: transmit buffer OFDMA, AST entry and puncture stats
* tag 'wireless-next-2025-01-17' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next: (322 commits)
wifi: brcmfmac: fix NULL pointer dereference in brcmf_txfinalize()
wifi: rtw88: add RTW88_LEDS depends on LEDS_CLASS to Kconfig
wifi: wilc1000: unregister wiphy only after netdev registration
wifi: cfg80211: adjust allocation of colocated AP data
wifi: mac80211: fix memory leak in ieee80211_mgd_assoc_ml_reconf()
wifi: ath12k: fix key cache handling
wifi: ath12k: Fix uninitialized variable access in ath12k_mac_allocate() function
wifi: ath12k: Remove ath12k_get_num_hw() helper function
wifi: ath12k: Refactor the ath12k_hw get helper function argument
wifi: ath12k: Refactor ath12k_hw set helper function argument
wifi: mt76: mt7996: add implicit beamforming support for mt7992
wifi: mt76: mt7996: fix beacon command during disabling
wifi: mt76: mt7996: fix ldpc setting
wifi: mt76: mt7996: fix definition of tx descriptor
wifi: mt76: connac: adjust phy capabilities based on band constraints
wifi: mt76: mt7996: fix incorrect indexing of MIB FW event
wifi: mt76: mt7996: fix HE Phy capability
wifi: mt76: mt7996: fix the capability of reception of EHT MU PPDU
wifi: mt76: mt7996: add max mpdu len capability
wifi: mt76: mt7921: avoid undesired changes of the preset regulatory domain
...
====================
Link: https://patch.msgid.link/20250117203529.72D45C4CEDD@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
After 1b23cdbd2b ("net: protect netdev->napi_list with netdev_lock()")
it makes sense to iterate through dev->napi_list while holding
the device lock.
Also call synchronize_net() at most one time.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250117232113.1612899-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
We have some leftovers from the switch to linkmode bitmaps which
- have never been used
- are not used any longer
- have no user outside phy_device.c
So remove them.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/5493b96e-88bb-4230-a911-322659ec5167@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
W=1 builds with gcc 14.2.1 report:
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:4193:32: error: ‘%s’ directive output may be truncated writing up to 31 bytes into a region of size 27 [-Werror=format-truncation=]
4193 | "/pkg %s", buf);
It's upset that we let buf be full length but then we use 5
characters for "/pkg ".
The builds is also clear with clang version 19.1.5 now.
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250117183726.1481524-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The number of SYN + MPC retransmissions before falling back to TCP was
fixed to 2. This is certainly a good default value, but having a fixed
number can be a problem in some environments.
The current behaviour means that if all packets are dropped, there will
be:
- The initial SYN + MPC
- 2 retransmissions with MPC
- The next ones will be without MPTCP.
So typically ~3 seconds before falling back to TCP. In some networks
where some temporally blackholes are unfortunately frequent, or when a
client tries to initiate connections while the network is not ready yet,
this can cause new connections not to have MPTCP connections.
In such environments, it is now possible to increase the number of SYN
retransmissions with MPTCP options to make sure MPTCP is used.
Interesting values are:
- 0: the first retransmission will be done without MPTCP options: quite
aggressive, but also a higher risk of detecting false-positive
MPTCP blackholes.
- >= 128: all SYN retransmissions will keep the MPTCP options: back to
the < 6.12 behaviour.
The default behaviour is not changed here.
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250117-net-next-mptcp-syn_retrans_before_tcp_fallback-v1-1-ab4b187099b0@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Instead of silently ignoring invalid/unsupported settings, report an
error. Additionally, relax the check for non-zero usecs to apply only
when it will be used (i.e. when frames != 1).
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://patch.msgid.link/20250116232954.2696930-3-sean.anderson@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Instead of using literals, add some symbolic constants for the IRQ delay
timer calculation.
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Reviewed by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://patch.msgid.link/20250116232954.2696930-2-sean.anderson@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
