Re: [PATCH net-next v9 00/15] net: lan966x: add support for PCIe FDMA

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Mon, 28 Sep 2026 21:32:48 +0200 you wrote:
> When lan966x operates as a PCIe endpoint, the driver currently uses
> register-based I/O for frame injection and extraction. This approach is
> functional but slow, topping out at around 33 Mbps on an Intel x86 host
> with a lan966x PCIe card.
> 
> This series adds FDMA (Frame DMA) support for the PCIe path. When
> operating as a PCIe endpoint, the internal FDMA engine on lan966x cannot
> directly access host memory, so DMA buffers are allocated as contiguous
> coherent memory and mapped through the PCIe Address Translation Unit
> (ATU). The ATU provides outbound windows that translate internal FDMA
> addresses to PCIe bus addresses, allowing the FDMA engine to read and
> write host memory. Because the ATU requires contiguous address regions,
> page_pool and normal per-page DMA mappings cannot be used. Instead,
> frames are transferred using memcpy between the ATU-mapped buffers and
> the network stack. With this, throughput increases from ~33 Mbps to
> ~620 Mbps for default MTU.
> 
> [...]

Here is the summary with links:
  - [net-next,v9,01/15] MAINTAINERS: add FDMA library to Sparx5 SoC entry
    https://git.kernel.org/netdev/net-next/c/91ad754f3c14
  - [net-next,v9,02/15] net: microchip: fdma: rename contiguous dataptr helpers
    https://git.kernel.org/netdev/net-next/c/27470b22eca3
  - [net-next,v9,03/15] net: microchip: fdma: add PCIe ATU support
    https://git.kernel.org/netdev/net-next/c/3318a794bb15
  - [net-next,v9,04/15] net: microchip: fdma: use little-endian types for descriptor fields
    https://git.kernel.org/netdev/net-next/c/9786c387b299
  - [net-next,v9,05/15] net: lan966x: add FDMA LLP register write helper
    https://git.kernel.org/netdev/net-next/c/2e52284420bd
  - [net-next,v9,06/15] net: lan966x: export FDMA helpers for reuse
    https://git.kernel.org/netdev/net-next/c/eac4b8882a03
  - [net-next,v9,07/15] net: lan966x: use a dedicated device for DMA operations
    https://git.kernel.org/netdev/net-next/c/f83ac2d94a2a
  - [net-next,v9,08/15] net: lan966x: add FDMA ops dispatch for PCIe support
    https://git.kernel.org/netdev/net-next/c/5a97c2c00b8e
  - [net-next,v9,09/15] net: lan966x: clear FDMA interrupt stickies after switch reset
    https://git.kernel.org/netdev/net-next/c/58e73ef6a1e5
  - [net-next,v9,10/15] net: lan966x: add shutdown callback to stop the FDMA on reboot
    https://git.kernel.org/netdev/net-next/c/ab6268b958f0
  - [net-next,v9,11/15] net: lan966x: add PCIe FDMA support
    https://git.kernel.org/netdev/net-next/c/e013b82ed3b2
  - [net-next,v9,12/15] net: lan966x: add PCIe FDMA MTU change support
    https://git.kernel.org/netdev/net-next/c/1709aa382db7
  - [net-next,v9,13/15] net: lan966x: add PCIe FDMA XDP support
    https://git.kernel.org/netdev/net-next/c/fbb46fde6965
  - [net-next,v9,14/15] misc: lan966x-pci: dts: extend cpu reg to cover PCIE DBI space
    https://git.kernel.org/netdev/net-next/c/100eead96ed6
  - [net-next,v9,15/15] misc: lan966x-pci: dts: add fdma interrupt to overlay
    https://git.kernel.org/netdev/net-next/c/14b9ac2f189d

You are awesome, thank you!
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