Re: [PATCH v2 5/6] can: c_can: prepare to up the message objects number

[Marc Kleine-Budde]

On 28.02.2021 11:18:13, Dario Binacchi wrote:
> > > +	u32 msg_obj_rx_mask;
> > 
> > Is this variable big enough after you've extended the driver to use 64
> > mailboxes?
> 
> Yes. I have kept the message assignment policy unchanged, they are equally 
> divided between reception and transmission. Therefore, in the case of 64 
> messages, 32 are used for reception and 32 for transmission. So a 32-bit 
> variable is enough.
> 
> > 
> > If you want to support 128 message objects converting the driver to the
> > linux bitmap API is another option.
> > 
> 
> Do you know if any of the hardware managed by Linux use a D_CAN controller 
> with 128 message objects?

Even the am437x only uses 64 message objects. Ok let's stay with 64 as
max for now.

regards,
Marc

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