From: Nicolai Hähnle <nicolai.haeh...@amd.com>
When a shader image view into a buffer texture can be written to, the buffer's
valid range must be updated, or subsequent transfers may incorrectly skip
synchronization.
This fixes a bug that was exposed in Xephyr by PBO acceleration for
glReadPixels,
reported by Michel Dänzer.
Cc: Michel Dänzer <michel.daen...@amd.com>
Cc: 12.0 <mesa-sta...@lists.freedesktop.org>
---
src/gallium/drivers/radeonsi/si_descriptors.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_descriptors.c
b/src/gallium/drivers/radeonsi/si_descriptors.c
index 71f4d71..d66996a 100644
--- a/src/gallium/drivers/radeonsi/si_descriptors.c
+++ b/src/gallium/drivers/radeonsi/si_descriptors.c
@@ -512,6 +512,23 @@ si_disable_shader_image(struct si_images_info *images,
unsigned slot)
}
}
+static void
+si_mark_image_range_valid(struct pipe_image_view *view)
+{
+ struct r600_resource *res = (struct r600_resource *)view->resource;
+ const struct util_format_description *desc;
+ unsigned stride;
+
+ assert(res && res->b.b.target == PIPE_BUFFER);
+
+ desc = util_format_description(view->format);
+ stride = desc->block.bits / 8;
+
+ util_range_add(&res->valid_buffer_range,
+ stride * (view->u.buf.first_element),
+ stride * (view->u.buf.last_element + 1));
+}
+
static void si_set_shader_image(struct si_context *ctx,
struct si_images_info *images,
unsigned slot, struct pipe_image_view *view)
@@ -533,6 +550,9 @@ static void si_set_shader_image(struct si_context *ctx,
RADEON_USAGE_READWRITE);
if (res->b.b.target == PIPE_BUFFER) {
+ if (view->access & PIPE_IMAGE_ACCESS_WRITE)
+ si_mark_image_range_valid(view);
+
si_make_buffer_descriptor(screen, res,
view->format,
view->u.buf.first_element,
@@ -1361,6 +1381,9 @@ static void si_invalidate_buffer(struct pipe_context
*ctx, struct pipe_resource
unsigned i = u_bit_scan(&mask);
if (images->views[i].resource == buf) {
+ if (images->views[i].access &
PIPE_IMAGE_ACCESS_WRITE)
+
si_mark_image_range_valid(&images->views[i]);
+
si_desc_reset_buffer_offset(
ctx, images->desc.list + i * 8 + 4,
old_va, buf);
--
2.7.4
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