4 files changed, 25 insertions, 14 deletions

diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_context.c b/src/gallium/drivers/freedreno/a6xx/fd6_context.c
index d16fbea6c6c..cb848fc20fc 100644
--- a/src/gallium/drivers/freedreno/a6xx/fd6_context.c
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_context.c
@@ -52,7 +52,7 @@ fd6_context_destroy(struct pipe_context *pctx)
 
 	fd_bo_del(fd6_ctx->vsc_data);
 	fd_bo_del(fd6_ctx->vsc_data2);
-	fd_bo_del(fd6_ctx->blit_mem);
+	fd_bo_del(fd6_ctx->control_mem);
 
 	fd_context_cleanup_common_vbos(&fd6_ctx->base);
 
@@ -124,8 +124,8 @@ fd6_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
 			A6XX_VSC_DATA2_PITCH * 32,
 			DRM_FREEDRENO_GEM_TYPE_KMEM, "vsc_data2");
 
-	fd6_ctx->blit_mem = fd_bo_new(screen->dev, 0x1000,
-			DRM_FREEDRENO_GEM_TYPE_KMEM, "blit");
+	fd6_ctx->control_mem = fd_bo_new(screen->dev, 0x1000,
+			DRM_FREEDRENO_GEM_TYPE_KMEM, "control");
 
 	fd_context_setup_common_vbos(&fd6_ctx->base);
 
diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_context.h b/src/gallium/drivers/freedreno/a6xx/fd6_context.h
index e033a73f3be..6a49ec6b80a 100644
--- a/src/gallium/drivers/freedreno/a6xx/fd6_context.h
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_context.h
@@ -54,12 +54,10 @@ struct fd6_context {
 #define A6XX_VSC_DATA_PITCH  0x4400
 #define A6XX_VSC_DATA2_PITCH 0x10400
 
-	/* TODO not sure what this is for.. probably similar to
-	 * CACHE_FLUSH_TS on kernel side, where value gets written
-	 * to this address synchronized w/ 3d (ie. a way to
-	 * synchronize when the CP is running far ahead)
+	/* The 'control' mem BO is used for various housekeeping
+	 * functions.  See 'struct fd6_control'
 	 */
-	struct fd_bo *blit_mem;
+	struct fd_bo *control_mem;
 	uint32_t seqno;
 
 	struct u_upload_mgr *border_color_uploader;
@@ -108,6 +106,19 @@ fd6_context(struct fd_context *ctx)
 struct pipe_context *
 fd6_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags);
 
+
+/* This struct defines the layout of the fd6_context::control buffer: */
+struct fd6_control {
+	uint32_t seqno;          /* seqno for async CP_EVENT_WRITE, etc */
+	uint32_t _pad0;
+	uint32_t flush_base;     /* dummy address for VPC_SO[i].FLUSH_BASE_LO/HI */
+	uint32_t _pad1;
+};
+
+#define control_ptr(fd6_ctx, member)  \
+	(fd6_ctx)->control_mem, offsetof(struct fd6_control, member), 0, 0
+
+
 static inline void
 emit_marker6(struct fd_ringbuffer *ring, int scratch_idx)
 {
diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_emit.c b/src/gallium/drivers/freedreno/a6xx/fd6_emit.c
index e75bb369bba..181f647a2bb 100644
--- a/src/gallium/drivers/freedreno/a6xx/fd6_emit.c
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_emit.c
@@ -728,7 +728,7 @@ fd6_emit_streamout(struct fd_ringbuffer *ring, struct fd6_emit *emit, struct ir3
 		// TODO just give hw a dummy addr for now.. we should
 		// be using this an then CP_MEM_TO_REG to set the
 		// VPC_SO[i].BUFFER_OFFSET for the next draw..
-		OUT_RELOCW(ring, fd6_context(ctx)->blit_mem, 0x100, 0, 0);
+		OUT_RELOCW(ring, control_ptr(fd6_context(ctx), flush_base));
 
 		emit->streamout_mask |= (1 << i);
 	}
@@ -1312,7 +1312,7 @@ fd6_framebuffer_barrier(struct fd_context *ctx)
 
 	OUT_PKT7(ring, CP_WAIT_REG_MEM, 6);
 	OUT_RING(ring, 0x00000013);
-	OUT_RELOC(ring, fd6_ctx->blit_mem, 0, 0, 0);
+	OUT_RELOC(ring, control_ptr(fd6_ctx, seqno));
 	OUT_RING(ring, seqno);
 	OUT_RING(ring, 0xffffffff);
 	OUT_RING(ring, 0x00000010);
@@ -1326,7 +1326,7 @@ fd6_framebuffer_barrier(struct fd_context *ctx)
 
 	OUT_PKT7(ring, CP_UNK_A6XX_14, 4);
 	OUT_RING(ring, 0x00000000);
-	OUT_RELOC(ring, fd6_ctx->blit_mem, 0, 0, 0);
+	OUT_RELOC(ring, control_ptr(fd6_ctx, seqno));
 	OUT_RING(ring, seqno);
 }
 
diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_emit.h b/src/gallium/drivers/freedreno/a6xx/fd6_emit.h
index ba44904ce4b..46a9ca82149 100644
--- a/src/gallium/drivers/freedreno/a6xx/fd6_emit.h
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_emit.h
@@ -136,7 +136,7 @@ fd6_event_write(struct fd_batch *batch, struct fd_ringbuffer *ring,
 	if (timestamp) {
 		struct fd6_context *fd6_ctx = fd6_context(batch->ctx);
 		seqno = ++fd6_ctx->seqno;
-		OUT_RELOCW(ring, fd6_ctx->blit_mem, 0, 0, 0);  /* ADDR_LO/HI */
+		OUT_RELOCW(ring, control_ptr(fd6_ctx, seqno));  /* ADDR_LO/HI */
 		OUT_RING(ring, seqno);
 	}
 
@@ -159,7 +159,7 @@ fd6_cache_flush(struct fd_batch *batch, struct fd_ringbuffer *ring)
 
 	OUT_PKT7(ring, CP_WAIT_REG_MEM, 6);
 	OUT_RING(ring, 0x00000013);
-	OUT_RELOC(ring, fd6_ctx->blit_mem, 0, 0, 0);
+	OUT_RELOC(ring, control_ptr(fd6_ctx, seqno));
 	OUT_RING(ring, seqno);
 	OUT_RING(ring, 0xffffffff);
 	OUT_RING(ring, 0x00000010);
@@ -168,7 +168,7 @@ fd6_cache_flush(struct fd_batch *batch, struct fd_ringbuffer *ring)
 
 	OUT_PKT7(ring, CP_UNK_A6XX_14, 4);
 	OUT_RING(ring, 0x00000000);
-	OUT_RELOC(ring, fd6_ctx->blit_mem, 0, 0, 0);
+	OUT_RELOC(ring, control_ptr(fd6_ctx, seqno));
 	OUT_RING(ring, seqno);
 }