Re: iwx 64-bit dma

On Wed, Jul 29, 2026 at 06:51:49PM -0600, Theo de Raadt wrote:
> Vitaliy Makkoveev <[email protected]> wrote:
> 
> > The IFXF_MBUF_64BIT flag affects only amd64. All other architectures
> > still uses memory below 4G. See revision 1.61 of
> > sys/arch/amd64/amd64/autoconf.c line 129.
> 
> I don't see how that matters, that's part of the mechanism for
> providing memory to drivers.
> 
> The diff in question which adds BUS_DMA_64BIT is a declaration to
> the higher-level code that _all_ chipsets supported by this driver can
> work with 64 bit-addressable memory if the higher levels provide it.
> 
> If one chipset can't do it, the experience will be terrible.
> 
> 
> 

Well, this means the revision 1.198 of sys/dev/pci/if_iwx.c is wrong and
should be reverted.