etnaviv: keep track of buffer valid ranges for PIPE_BUFFER

This allows a write to proceed to an uninitialized part of a buffer
even when the GPU is using the previously-initialized portions.

Such a situation can be triggered with the following API usage example:

  glBufferSubData(..., offset, size, data1);
  glDrawArrays(...);
  // append new vertex data
  glBufferSubData(..., offset+size, size, data2);
  glDrawArrays(...);

Same is done for freedreno, nouveau and radeon.

Signed-off-by: Christian Gmeiner <[email protected]>
Reviewed-by: Lucas Stach <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gallium/drivers/etnaviv/etnaviv_resource.c b/src/gallium/drivers/etnaviv/etnaviv_resource.c
index f1e314cb06f..cca8b64d7c6 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_resource.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_resource.c
@@ -300,6 +300,7 @@ etna_resource_alloc(struct pipe_screen *pscreen, unsigned layout,
    rsc->halign = halign;
 
    pipe_reference_init(&rsc->base.reference, 1);
+   util_range_init(&rsc->valid_buffer_range);
 
    size = setup_miptree(rsc, paddingX, paddingY, msaa_xscale, msaa_yscale);
 
@@ -477,6 +478,8 @@ etna_resource_destroy(struct pipe_screen *pscreen, struct pipe_resource *prsc)
    if (rsc->scanout)
       renderonly_scanout_destroy(rsc->scanout, etna_screen(pscreen)->ro);
 
+   util_range_destroy(&rsc->valid_buffer_range);
+
    pipe_resource_reference(&rsc->texture, NULL);
    pipe_resource_reference(&rsc->render, NULL);
 
@@ -513,6 +516,7 @@ etna_resource_from_handle(struct pipe_screen *pscreen,
    *prsc = *tmpl;
 
    pipe_reference_init(&prsc->reference, 1);
+   util_range_init(&rsc->valid_buffer_range);
    prsc->screen = pscreen;
 
    rsc->bo = etna_screen_bo_from_handle(pscreen, handle, &level->stride);