Hi Danilo,
Thanks for the feedback. The change has been made and will be in the next version.
Thanks,
Donald
On Tue, 2023-10-10 at 18:31 +0200, Danilo Krummrich wrote:
> *** CAUTION: This email originates from a source not known to Imagination Technologies. Think before you click a link or open an attachment ***
>
> On 10/10/23 15:37, Sarah Walker wrote:
> > From: Donald Robson <donald.robson@xxxxxxxxxx>
> >
> > Determining the start and range of the unmap stage of a remap op is a
> > common piece of code currently implemented by multiple drivers. Add a
> > helper for this.
> >
> > Changes since v6:
> > - Remove use of __always_inline
> >
> > Signed-off-by: Donald Robson <donald.robson@xxxxxxxxxx>
> > Signed-off-by: Sarah Walker <sarah.walker@xxxxxxxxxx>
> > ---
> > include/drm/drm_gpuvm.h | 27 +++++++++++++++++++++++++++
> > 1 file changed, 27 insertions(+)
> >
> > diff --git a/include/drm/drm_gpuvm.h b/include/drm/drm_gpuvm.h
> > index c7ed6bf441d4..932e942da921 100644
> > --- a/include/drm/drm_gpuvm.h
> > +++ b/include/drm/drm_gpuvm.h
> > @@ -702,4 +702,31 @@ void drm_gpuva_remap(struct drm_gpuva *prev,
> >
> > void drm_gpuva_unmap(struct drm_gpuva_op_unmap *op);
> >
> > +/**
> > + * drm_gpuva_op_remap_get_unmap_range() - Helper to get the start and range of
>
> Not a strong opinion on that, but maybe drm_gpuva_op_remap_to_unmap_range() would
> be a bit better.
>
> > + * the unmap stage of a remap op.
> > + * @op: Remap op.
> > + * @start_addr: Output pointer for the start of the required unmap.
> > + * @range: Output pointer for the length of the required unmap.
> > + *
> > + * These parameters can then be used by the caller to unmap memory pages that
> > + * are no longer required.
>
> I think we should be a bit more precise on what this is good for. Maybe something
> like: "The given start address and range will be set such that they represent the
> range of the address space that was previously covered by the mapping getting
> re-mapped, but is empty now."
>
> > + */
> > +static inline void
> > +drm_gpuva_op_remap_get_unmap_range(const struct drm_gpuva_op_remap *op,
> > + u64 *start_addr, u64 *range)
> > +{
> > + const u64 va_start = op->prev ?
> > + op->prev->va.addr + op->prev->va.range :
> > + op->unmap->va->va.addr;
> > + const u64 va_end = op->next ?
> > + op->next->va.addr :
> > + op->unmap->va->va.addr + op->unmap->va->va.range;
> > +
> > + if (start_addr)
> > + *start_addr = va_start;
> > + if (range)
> > + *range = va_end - va_start;
> > +}
> > +
> > #endif /* __DRM_GPUVM_H__ */
