Hi Sergei,
> Subject: Re: [RFC/PATCH 11/18] ravb: Add rx_2k_buffers to struct
> ravb_hw_info
>
> On 9/23/21 5:08 PM, Biju Das wrote:
>
> > R-Car AVB-DMAC has Maximum 2K size on RZ buffer.
> > We need to Allow for changing the MTU within the limit of the maximum
> > size of a descriptor (2048 bytes).
> >
> > Add a rx_2k_buffers hw feature bit to struct ravb_hw_info to add this
> > constraint only for R-Car.
> >
> > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > ---
> > drivers/net/ethernet/renesas/ravb.h | 1 +
> > drivers/net/ethernet/renesas/ravb_main.c | 8 ++++++--
> > 2 files changed, 7 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/renesas/ravb.h
> > b/drivers/net/ethernet/renesas/ravb.h
> > index 7532cb51d7b8..ab4909244276 100644
> > --- a/drivers/net/ethernet/renesas/ravb.h
> > +++ b/drivers/net/ethernet/renesas/ravb.h
> > @@ -1033,6 +1033,7 @@ struct ravb_hw_info {
> > unsigned magic_pkt:1; /* E-MAC supports magic packet
> detection */
> > unsigned mii_rgmii_selection:1; /* E-MAC supports mii/rgmii
> selection */
> > unsigned half_duplex:1; /* E-MAC supports half duplex mode */
> > + unsigned rx_2k_buffers:1; /* AVB-DMAC has Max 2K buf size on RX
> */
>
> It seems more flexible to specify the buffer size, not just a bit like
> this...
Agreed, will use rx_max_buf_size variable on the next version.
Regards,
Biju
