freedreno: add resource seqno

Intended to be something more compact than a 64b pointer, which could be
used as a key into hashtables.  Prep work for texture state objects.

Signed-off-by: Rob Clark <robdclark@gmail.com>

src/gallium/drivers/freedreno/freedreno_resource.c

@@ -108,6 +108,7 @@ realloc_bo(struct fd_resource *rsc, uint32_t size)
 		fd_bo_del(rsc->bo);
 
 	rsc->bo = fd_bo_new(screen->dev, size, flags);
+	rsc->seqno = p_atomic_inc_return(&screen->rsc_seqno);
 	util_range_set_empty(&rsc->valid_buffer_range);
 	fd_bc_invalidate_resource(rsc, true);
 }
@@ -193,6 +194,7 @@ fd_try_shadow_resource(struct fd_context *ctx, struct fd_resource *rsc,
 	/* TODO valid_buffer_range?? */
 	swap(rsc->bo,        shadow->bo);
 	swap(rsc->write_batch,   shadow->write_batch);
+	rsc->seqno = p_atomic_inc_return(&ctx->screen->rsc_seqno);
 
 	/* at this point, the newly created shadow buffer is not referenced
 	 * by any batches, but the existing rsc (probably) is.  We need to

src/gallium/drivers/freedreno/freedreno_resource.h

@@ -95,6 +95,9 @@ struct fd_resource {
 	 */
 	uint32_t bc_batch_mask;
 
+	/* Sequence # incremented each time bo changes: */
+	uint16_t seqno;
+
 	unsigned tile_mode : 2;
 	unsigned preferred_tile_mode : 2;
 

src/gallium/drivers/freedreno/freedreno_screen.h

@@ -95,6 +95,8 @@ struct fd_screen {
 	struct fd_batch_cache batch_cache;
 
 	bool reorder;
+
+	uint16_t rsc_seqno;
 };
 
 static inline struct fd_screen *

src/gallium/drivers/freedreno/freedreno_texture.c

@@ -117,9 +117,10 @@ fd_set_sampler_views(struct pipe_context *pctx, enum pipe_shader_type shader,
 void
 fd_texture_init(struct pipe_context *pctx)
 {
-	pctx->delete_sampler_state = fd_sampler_state_delete;
-
-	pctx->sampler_view_destroy = fd_sampler_view_destroy;
+	if (!pctx->delete_sampler_state)
+		pctx->delete_sampler_state = fd_sampler_state_delete;
+	if (!pctx->sampler_view_destroy)
+		pctx->sampler_view_destroy = fd_sampler_view_destroy;
 }
 
 /* helper for setting up border-color buffer for a3xx/a4xx: */