From: patchwork-bot+netdevbpf@kernel.org
To: Daniel Machon <daniel.machon@microchip.com>
Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, horatiu.vultur@microchip.com,
steen.hegelund@microchip.com, UNGLinuxDriver@microchip.com,
ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org,
john.fastabend@gmail.com, sdf@fomichev.me,
herve.codina@bootlin.com, arnd@arndb.de,
gregkh@linuxfoundation.org, mohsin.bashr@gmail.com,
horms@kernel.org, richardcochran@gmail.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
bpf@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH net-next v9 00/15] net: lan966x: add support for PCIe FDMA
Date: Fri, 02 Oct 2026 20:20:10 +0000 [thread overview]
Message-ID: <179097241009.3571263.7855609924848232097.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260928-lan966x-pci-fdma-v9-0-a17caf60f89a@microchip.com>
Hello:
This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:
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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prev parent reply other threads:[~2026-10-02 20:20 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 19:32 Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 01/15] MAINTAINERS: add FDMA library to Sparx5 SoC entry Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 02/15] net: microchip: fdma: rename contiguous dataptr helpers Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 03/15] net: microchip: fdma: add PCIe ATU support Daniel Machon
2026-10-02 7:33 ` netdev-bot+sashiko
2026-09-28 19:32 ` [PATCH net-next v9 04/15] net: microchip: fdma: use little-endian types for descriptor fields Daniel Machon
2026-10-02 13:25 ` Simon Horman
2026-09-28 19:32 ` [PATCH net-next v9 05/15] net: lan966x: add FDMA LLP register write helper Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 06/15] net: lan966x: export FDMA helpers for reuse Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 07/15] net: lan966x: use a dedicated device for DMA operations Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 08/15] net: lan966x: add FDMA ops dispatch for PCIe support Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 09/15] net: lan966x: clear FDMA interrupt stickies after switch reset Daniel Machon
2026-09-28 19:32 ` [PATCH net-next v9 10/15] net: lan966x: add shutdown callback to stop the FDMA on reboot Daniel Machon
2026-10-02 7:33 ` netdev-bot+sashiko
2026-09-28 19:32 ` [PATCH net-next v9 11/15] net: lan966x: add PCIe FDMA support Daniel Machon
2026-10-02 7:33 ` netdev-bot+sashiko
2026-10-02 9:02 ` Daniel Machon
2026-10-02 14:14 ` Simon Horman
2026-09-28 19:33 ` [PATCH net-next v9 12/15] net: lan966x: add PCIe FDMA MTU change support Daniel Machon
2026-10-02 7:33 ` netdev-bot+sashiko
2026-10-02 9:08 ` Daniel Machon
2026-09-28 19:33 ` [PATCH net-next v9 13/15] net: lan966x: add PCIe FDMA XDP support Daniel Machon
2026-10-02 7:33 ` netdev-bot+sashiko
2026-10-02 9:11 ` Daniel Machon
2026-09-28 19:33 ` [PATCH net-next v9 14/15] misc: lan966x-pci: dts: extend cpu reg to cover PCIE DBI space Daniel Machon
2026-10-02 7:33 ` netdev-bot+sashiko
2026-09-28 19:33 ` [PATCH net-next v9 15/15] misc: lan966x-pci: dts: add fdma interrupt to overlay Daniel Machon
2026-10-02 7:33 ` netdev-bot+sashiko
2026-10-02 9:16 ` Daniel Machon
2026-10-02 20:20 ` patchwork-bot+netdevbpf [this message]
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