[PATCH 2/2] net: dwc_eth_qos: Add support for bulk RX descriptor cleaning

[Tom Rini]

On Sun, Oct 09, 2022 at 05:51:46PM +0200, Marek Vasut wrote:

> Add new desc_per_cacheline property which lets a platform run RX descriptor
> cleanup after every power-of-2 - 1 received packets instead of every packet.
> This is useful on platforms where (axi_bus_width EQOS_AXI_WIDTH_n * DMA DSL
> inter-descriptor word skip count + DMA descriptor size) is less than cache
> line size, which necessitates packing multiple DMA descriptors into single
> cache line.
> 
> In case of TX descriptors, this is not a problem, since the driver always
> does synchronous TX, i.e. the TX descriptor is always written, flushed and
> polled for completion in eqos_send().
> 
> In case of RX descriptors, it is necessary to update their status in bulk,
> i.e. after the entire cache line worth of RX descriptors has been used up
> to receive data.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>
> Reviewed-by: Ramon Fried <rfried.dev at gmail.com>

Applied to u-boot/master, thanks!

-- 
Tom
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