[PATCH v6 13/25] iommufd: Add mmap interface

[Nicolin Chen]

On Mon, Jun 16, 2025 at 11:13:19AM -0300, Jason Gunthorpe wrote:
> On Sat, Jun 14, 2025 at 12:14:38AM -0700, Nicolin Chen wrote:
> 
> > +/* Entry for iommufd_ctx::mt_mmap */
> > +struct iommufd_mmap {
> > +	struct iommufd_object *owner;
> > +
> > +	/* Allocated start position in mt_mmap tree */
> > +	unsigned long startp;
> 
> pgoff_t, looks like this is already in PAGE_SIZE units.
> 
> > +	/* Physical range for io_remap_pfn_range() */
> > +	unsigned long mmio_pfn;
> 
> physaddr_t and maybe don't use pfn?
> 
> > +	unsigned long num_pfns;
> 
> size_t

The mtree stores in pfn units. Looks like you prefer doing in
PAGE_SIZE units? I can give that a try and update them as you
suggested.

Thanks
Nicolin