> Will do. Are you planning to hold off your tests until v3? It shouldn't take
> too
> long.
Sure, we will wait for v3
Hi Bryan,
On Fri, Feb 12, 2021 at 3:45 PM wrote:
>
> According to the document I have, FRAME_LENGTH is only valid when LS bit is
> set, and reserved otherwise.
> Therefore, I'm not sure you can rely on it being zero when LS is not set,
> even if your experiments say it is.
> Future chip
Hi Sven, see below.
> + if (buffer_info->dma_ptr) {
> + /* unmap from dma */
> + packet_length = RX_DESC_DATA0_FRAME_LENGTH_GET_
> + (le32_to_cpu(descriptor->data0));
> + if (packet_length == 0 ||
> +
From: Sven Van Asbroeck
On cpu architectures w/o dma cache snooping, dma_unmap() is a
is a very expensive operation, because its resulting sync
needs to invalidate cpu caches.
Increase efficiency/performance by syncing only those sections
of the lan743x's rx ring buffers that are actually in
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