On Fri, May 04, 2018 at 10:00:32AM -0700, Nanley Chery wrote:
> On Fri, May 04, 2018 at 09:42:34AM -0700, Nanley Chery wrote:
> > On Thu, May 03, 2018 at 12:03:50PM -0700, Nanley Chery wrote:
> > > Add infrastructure for initializing the clear color BO.
> > > ---
> > > src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 68
> > > ++++++++++++---------------
> > > 1 file changed, 31 insertions(+), 37 deletions(-)
> > >
> > > diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> > > b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> > > index 182a896e23a..5d3ee569bd8 100644
> > > --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> > > +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> > > @@ -1658,41 +1658,13 @@ intel_miptree_copy_teximage(struct brw_context
> > > *brw,
> > > intel_obj->needs_validate = true;
> > > }
> > >
> > > -static bool
> > > -intel_miptree_init_mcs(struct brw_context *brw,
> > > - struct intel_mipmap_tree *mt,
> > > - int init_value)
> > > -{
> > > - assert(mt->aux_buf != NULL);
> > > -
> > > - /* From the Ivy Bridge PRM, Vol 2 Part 1 p326:
> > > - *
> > > - * When MCS buffer is enabled and bound to MSRT, it is required
> > > that it
> > > - * is cleared prior to any rendering.
> > > - *
> > > - * Since we don't use the MCS buffer for any purpose other than
> > > rendering,
> > > - * it makes sense to just clear it immediately upon allocation.
> > > - *
> > > - * Note: the clear value for MCS buffers is all 1's, so we memset to
> > > 0xff.
> > > - */
> > > - void *map = brw_bo_map(brw, mt->aux_buf->bo, MAP_WRITE | MAP_RAW);
> > > - if (unlikely(map == NULL)) {
> > > - fprintf(stderr, "Failed to map mcs buffer into GTT\n");
> > > - intel_miptree_aux_buffer_free(mt->aux_buf);
> > > - mt->aux_buf = NULL;
> > > - return false;
> > > - }
> > > - void *data = map;
> > > - memset(data, init_value, mt->aux_buf->size);
> > > - brw_bo_unmap(mt->aux_buf->bo);
> > > - return true;
> > > -}
> > > -
> > > static struct intel_miptree_aux_buffer *
> > > intel_alloc_aux_buffer(struct brw_context *brw,
> > > const char *name,
> > > const struct isl_surf *aux_surf,
> > > uint32_t alloc_flags,
> > > + bool wants_memset,
> > > + uint8_t memset_value,
> > > struct intel_mipmap_tree *mt)
> > > {
> > > struct intel_miptree_aux_buffer *buf = calloc(sizeof(*buf), 1);
> > > @@ -1725,6 +1697,19 @@ intel_alloc_aux_buffer(struct brw_context *brw,
> > > return NULL;
> > > }
> > >
> > > + /* Initialize the bo to the desired value */
> > > + if (wants_memset) {
> > > + assert(!(alloc_flags & BO_ALLOC_BUSY));
> > > +
> > > + void *map = brw_bo_map(brw, buf->bo, MAP_WRITE | MAP_RAW);
> > > + if (map == NULL) {
> > > + intel_miptree_aux_buffer_free(buf);
> > > + return NULL;
> > > + }
> > > + memset(map, memset_value, mt->aux_buf->size);
> >
> > Found a bug here. The last argument should be buf->size because
> > mt->aux_buf hasn't been assigned yet. Will fix locally.
> >
> > -Nanley
> >
>
> False alarm. Sorry for the noise.
>
> -Nanley
>
... I was looking at the wrong code. I'll fix this.
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