Hello, When RZ/G2L support was added the Rx code path was split in two, one to support R-Car and one to support RZ/G2L. One reason for this is that R-Car uses the extended Rx descriptor format, while RZ/G2L uses the normal descriptor format. In many aspects this is not needed as the extended descriptor format is just a normal descriptor with extra metadata (timestamsp) appended. And the R-Car SoCs can also use normal descriptors if hardware timestamps were not desired. This split has led to RZ/G2L gaining support for split descriptors in the Rx path while R-Car still lacks this. This series is the first step in trying to merge the R-Car and RZ/G2L Rx paths so features and bugs corrected in one will benefit the other. The first patch in the series clarifies that the driver now supports either normal or extended descriptors, not both at the same time by grouping them in a union. This is the foundation that later patches will build on the aligning the two Rx paths. Patches 2-5 deals with correcting small issues in the Rx frame and descriptor sizes that either were incorrect at the time they were added in 2017 (my bad) or concepts built on-top of this initial incorrect design. While finally patch 6 merges the R-Car and RZ/G2L for Rx descriptor setup and maintenance. When this work has landed I plan to follow up with more work aligning the rest of the Rx code paths and hopefully bring split descriptor support to the R-Car SoCs. Niklas Söderlund (6): ravb: Group descriptor types used in Rx ring ravb: Make it clear the information relates to maximum frame size ravb: Create helper to allocate skb and align it ravb: Use the max frame size from hardware info for RZ/G2L ravb: Move maximum Rx descriptor data usage to info struct ravb: Unify Rx ring maintenance code paths drivers/net/ethernet/renesas/ravb.h | 20 +-- drivers/net/ethernet/renesas/ravb_main.c | 210 ++++++++--------------- 2 files changed, 83 insertions(+), 147 deletions(-) -- 2.44.0
