Module: Mesa
Branch: master
Commit: f1be3d8cdde17a9b9ae283e1bab2f46b992d3bf3
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=f1be3d8cdde17a9b9ae283e1bab2f46b992d3bf3

Author: Marek Olšák <[email protected]>
Date:   Sat Jun 27 14:03:46 2015 +0200

radeonsi: don't flush an empty IB if the only thing we need is a fence

Reviewed-by: Alex Deucher <[email protected]>

---

 src/gallium/drivers/radeonsi/si_hw_context.c |   16 +++++++++++++---
 src/gallium/drivers/radeonsi/si_pipe.c       |    1 +
 src/gallium/drivers/radeonsi/si_pipe.h       |    1 +
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/src/gallium/drivers/radeonsi/si_hw_context.c 
b/src/gallium/drivers/radeonsi/si_hw_context.c
index 313ced7..08cc08e 100644
--- a/src/gallium/drivers/radeonsi/si_hw_context.c
+++ b/src/gallium/drivers/radeonsi/si_hw_context.c
@@ -82,9 +82,15 @@ void si_context_gfx_flush(void *context, unsigned flags,
 {
        struct si_context *ctx = context;
        struct radeon_winsys_cs *cs = ctx->b.rings.gfx.cs;
+       struct radeon_winsys *ws = ctx->b.ws;
 
-       if (cs->cdw == ctx->b.initial_gfx_cs_size && !fence)
+       if (cs->cdw == ctx->b.initial_gfx_cs_size) {
+               if (fence)
+                       ws->fence_reference(fence, ctx->last_gfx_fence);
+               if (!(flags & RADEON_FLUSH_ASYNC))
+                       ws->cs_sync_flush(cs);
                return;
+       }
 
        ctx->b.rings.gfx.flushing = true;
 
@@ -101,9 +107,13 @@ void si_context_gfx_flush(void *context, unsigned flags,
        flags |= RADEON_FLUSH_KEEP_TILING_FLAGS;
 
        /* Flush the CS. */
-       ctx->b.ws->cs_flush(cs, flags, fence, ctx->screen->b.cs_count++);
+       ws->cs_flush(cs, flags, &ctx->last_gfx_fence,
+                    ctx->screen->b.cs_count++);
        ctx->b.rings.gfx.flushing = false;
 
+       if (fence)
+               ws->fence_reference(fence, ctx->last_gfx_fence);
+
 #if SI_TRACE_CS
        if (ctx->screen->b.trace_bo) {
                struct si_screen *sscreen = ctx->screen;
@@ -111,7 +121,7 @@ void si_context_gfx_flush(void *context, unsigned flags,
 
                for (i = 0; i < 10; i++) {
                        usleep(5);
-                       if 
(!ctx->b.ws->buffer_is_busy(sscreen->b.trace_bo->buf, RADEON_USAGE_READWRITE)) {
+                       if (!ws->buffer_is_busy(sscreen->b.trace_bo->buf, 
RADEON_USAGE_READWRITE)) {
                                break;
                        }
                }
diff --git a/src/gallium/drivers/radeonsi/si_pipe.c 
b/src/gallium/drivers/radeonsi/si_pipe.c
index 77b8d7d..13b67d2 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -44,6 +44,7 @@ static void si_destroy_context(struct pipe_context *context)
        pipe_resource_reference(&sctx->null_const_buf.buffer, NULL);
        r600_resource_reference(&sctx->border_color_table, NULL);
        r600_resource_reference(&sctx->scratch_buffer, NULL);
+       sctx->b.ws->fence_reference(&sctx->last_gfx_fence, NULL);
 
        si_pm4_free_state(sctx, sctx->init_config, ~0);
        si_pm4_delete_state(sctx, gs_rings, sctx->gs_rings);
diff --git a/src/gallium/drivers/radeonsi/si_pipe.h 
b/src/gallium/drivers/radeonsi/si_pipe.h
index 2d67342..67cb035 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.h
+++ b/src/gallium/drivers/radeonsi/si_pipe.h
@@ -137,6 +137,7 @@ struct si_context {
        void                            *pstipple_sampler_state;
        struct si_screen                *screen;
        struct si_pm4_state             *init_config;
+       struct pipe_fence_handle        *last_gfx_fence;
 
        union {
                struct {

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