Re: Phyr Starter

[Thomas Zimmermann]

Hi

Am 11.01.22 um 14:56 schrieb Matthew Wilcox:
> On Tue, Jan 11, 2022 at 12:40:10PM +0100, Thomas Zimmermann wrote:
> > Hi
> >
> > Am 10.01.22 um 20:34 schrieb Matthew Wilcox:
> > > TLDR: I want to introduce a new data type:
> > >
> > > struct phyr {
> > >           phys_addr_t addr;
> > >           size_t len;
> > > };
> >
> > Did you look at struct dma_buf_map? [1]
>
> Thanks.  I wasn't aware of that.  It doesn't seem to actually solve the
> problem, in that it doesn't carry any length information.  Did you mean
> to point me at a different structure?

It's the structure I meant. It refers to a buffer, so the length could 
be added. For something more sophisticated, dma_buf_map could be changed 
to distinguish between the buffer and an iterator pointing into the buffer.

But if it's really different, then so be it.

Best regards
Thomas

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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