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

[Jason Gunthorpe]

On Mon, Jun 16, 2025 at 07:37:26PM -0700, Nicolin Chen wrote:
> 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.

PFN and PAGE_SIZE units are the same thing

Jason