[PATCH net-next 00/13] Support the Cadence MACB/GEM instances on Mobileye EyeQ5 SoCs

Théo Lebrun
2025-03-21T19:14:51Z

Mobileye EyeQ5 SoCs provides two GEM IP blocks. The end result is
working networking on the EyeQ5 eval board. It isn't just a new
macb_config & compatible, here are each commit with a brief note:

- Let's get the cleanup patches out of the way first:

[PATCH net-next 04/13] net: macb: use BIT() macro for capability definitions
[PATCH net-next 06/13] net: macb: simplify macb_probe() code touching match data
[PATCH net-next 08/13] net: macb: introduce DMA descriptor helpers (is 64bit? is PTP?)
[PATCH net-next 09/13] net: macb: sort #includes

- LSO has been observed to be buggy, even though HW reports it is
supported. We add a capability to force-disable it:

[PATCH net-next 05/13] net: macb: add no LSO capability (MACB_CAPS_NO_LSO)

- The MACB driver code has an issue: the HW inserts two dummy bytes at
the start of Rx buffers, for IP header alignment (ie skb_reserve is
done AFTER writing the addr in DMA descriptors). But the driver
assumes that alignment is NET_IP_ALIGN. We appear to be facing the
first SoC where that isn't the case.

Happy to get comments & discuss the approach proposed.

[PATCH net-next 07/13] net: macb: move HW IP alignment value to macb_config

- We want cache coherent memory through a CM3 IO Coherency Unit (IOCU).
To route through that, DMA addresses must have BIT(36) enabled.

We do that in platform-specific code and hook our dma_map_ops through
a notifier block.

[PATCH net-next 11/13] MIPS: mobileye: add EyeQ5 DMA IOCU support

- dt-bindings improvements:

[PATCH net-next 02/13] dt-bindings: net: cdns,macb: allow tsu_clk without tx_clk
[PATCH net-next 03/13] dt-bindings: net: cdns,macb: allow dma-coherent

- Add the hardware to:
- dt-bindings: new compatible, new phandle property,
- the driver: macb_config, compatible and a custom init callback
(that needs a regmap to the system-controller),
- the DTS: both the SoC GEM instances and the eval board PHYs.

[PATCH net-next 01/13] dt-bindings: net: cdns,macb: add Mobileye EyeQ5 ethernet interface
[PATCH net-next 10/13] net: macb: Add "mobileye,eyeq5-gem" compatible
[PATCH net-next 12/13] MIPS: mobileye: eyeq5: add two Cadence GEM Ethernet controllers
[PATCH net-next 13/13] MIPS: mobileye: eyeq5-epm: add two Cadence GEM Ethernet PHYs

Have a nice day,
Théo

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
Théo Lebrun (13):
dt-bindings: net: cdns,macb: add Mobileye EyeQ5 ethernet interface
dt-bindings: net: cdns,macb: allow tsu_clk without tx_clk
dt-bindings: net: cdns,macb: allow dma-coherent
net: macb: use BIT() macro for capability definitions
net: macb: add no LSO capability (MACB_CAPS_NO_LSO)
net: macb: simplify macb_probe() code touching match data
net: macb: move HW IP alignment value to macb_config
net: macb: introduce DMA descriptor helpers (is 64bit? is PTP?)
net: macb: sort #includes
net: macb: Add "mobileye,eyeq5-gem" compatible
MIPS: mobileye: add EyeQ5 DMA IOCU support
MIPS: mobileye: eyeq5: add two Cadence GEM Ethernet controllers
MIPS: mobileye: eyeq5-epm: add two Cadence GEM Ethernet PHYs

.../devicetree/bindings/net/cdns,macb.yaml | 25 +-
MAINTAINERS | 2 +-
arch/mips/boot/dts/mobileye/eyeq5-epm5.dts | 26 ++
arch/mips/boot/dts/mobileye/eyeq5.dtsi | 34 +++
arch/mips/mobileye/Kconfig | 1 +
arch/mips/mobileye/Makefile | 2 +
arch/mips/mobileye/eyeq5-iocu-dma.c | 160 +++++++++++
drivers/net/ethernet/cadence/macb.h | 51 ++--
drivers/net/ethernet/cadence/macb_main.c | 309 +++++++++++++--------
9 files changed, 470 insertions(+), 140 deletions(-)
---
base-commit: ddf9c6d982ae7472a4da982e0497be2a140a194b
change-id: 20250311-macb-65a7fa86af1d

Best regards,
--
Théo Lebrun <theo.lebrun@bootlin.com>