Mesa (master): anv: Apply any needed PIPE_CONTROLs before emitting state

[GitLab Mirror]

Module: Mesa
Branch: master
Commit: 969aeb6a93aefd037b130e4b37f58043fef493c3
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=969aeb6a93aefd037b130e4b37f58043fef493c3

Author: Jason Ekstrand <jason at jlekstrand.net>
Date:   Thu Apr 16 15:33:43 2020 -0500

anv: Apply any needed PIPE_CONTROLs before emitting state

Push constants in particular can get picked up by the hardware at weird
times that happen *before* 3DPRIMITIVE.  Therefore, we need to flush
before we emit all our state to ensure that any data they may pick up is
in memory in time.  This fixes an app which does vkCmdCopyBuffers
immediately followed by a vkCmdBeginRenderPass and vkCmdDraw which uses
the destination of the copy as a UBO which we push.

Cc: mesa-stable at lists.freedesktop.org
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4601>

---

 src/intel/vulkan/genX_cmd_buffer.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
index efc05889f79..7be8ba819e6 100644
--- a/src/intel/vulkan/genX_cmd_buffer.c
+++ b/src/intel/vulkan/genX_cmd_buffer.c
@@ -3247,6 +3247,12 @@ genX(cmd_buffer_flush_state)(struct anv_cmd_buffer *cmd_buffer)
 
    genX(flush_pipeline_select_3d)(cmd_buffer);
 
+   /* Apply any pending pipeline flushes we may have.  We want to apply them
+    * now because, if any of those flushes are for things like push constants,
+    * the GPU will read the state at weird times.
+    */
+   genX(cmd_buffer_apply_pipe_flushes)(cmd_buffer);
+
    uint32_t vb_emit = cmd_buffer->state.gfx.vb_dirty & pipeline->vb_used;
    if (cmd_buffer->state.gfx.dirty & ANV_CMD_DIRTY_PIPELINE)
       vb_emit |= pipeline->vb_used;
@@ -4147,6 +4153,12 @@ genX(cmd_buffer_flush_compute_state)(struct anv_cmd_buffer *cmd_buffer)
 
    genX(flush_pipeline_select_gpgpu)(cmd_buffer);
 
+   /* Apply any pending pipeline flushes we may have.  We want to apply them
+    * now because, if any of those flushes are for things like push constants,
+    * the GPU will read the state at weird times.
+    */
+   genX(cmd_buffer_apply_pipe_flushes)(cmd_buffer);
+
    if (cmd_buffer->state.compute.pipeline_dirty) {
       /* From the Sky Lake PRM Vol 2a, MEDIA_VFE_STATE:
        *