radeonsi: Create CE IB.

Based on work by Marek Olšák.

v2: Add preamble IB.

Leaves the load packet in the space calculation as the
radeon winsys might not be able to support a premable.

The added space calculation may look expensive, but
is converted to a constant with (at least) -O2 and -O3.

v3: - Fix code style.
    - Remove needed space for vertex buffer descriptors.
    - Fail when the preamble cannot be created.

Signed-off-by: Bas Nieuwenhuizen <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeonsi/si_pipe.c b/src/gallium/drivers/radeonsi/si_pipe.c
index 6a990ed64c3..ddfa59fd128 100644
--- a/src/gallium/drivers/radeonsi/si_pipe.c
+++ b/src/gallium/drivers/radeonsi/si_pipe.c
@@ -142,6 +142,21 @@ static struct pipe_context *si_create_context(struct pipe_screen *screen,
 
 	sctx->b.gfx.cs = ws->cs_create(sctx->b.ctx, RING_GFX,
 				       si_context_gfx_flush, sctx);
+
+	if (!(sscreen->b.debug_flags & DBG_NO_CE) && ws->cs_add_const_ib) {
+		sctx->ce_ib = ws->cs_add_const_ib(sctx->b.gfx.cs);
+		if (!sctx->ce_ib)
+			goto fail;
+
+		if (ws->cs_add_const_preamble_ib) {
+			sctx->ce_preamble_ib =
+			           ws->cs_add_const_preamble_ib(sctx->b.gfx.cs);
+
+			if (!sctx->ce_preamble_ib)
+				goto fail;
+		}
+	}
+
 	sctx->b.gfx.flush = si_context_gfx_flush;
 
 	/* Border colors. */