freedreno: threaded batch flush

With the state accessed from GMEM+submit factored out of fd_context and
into fd_batch, now it is possible to punt this off to a helper thread.
And more importantly, since there are cases where one context might
force the batch-cache to flush another context's batches (ie. when there
are too many in-flight batches), using a per-context helper thread keeps
various different flushes for a given context serialized.

TODO as with batch-cache, there are a few places where we'll need a
mutex to protect critical sections, which is completely missing at the
moment.

Signed-off-by: Rob Clark <[email protected]>

1 files changed, 11 insertions, 5 deletions

diff --git a/src/gallium/drivers/freedreno/freedreno_resource.c b/src/gallium/drivers/freedreno/freedreno_resource.c
index 0e0305885a7..a091f5f1774 100644
--- a/src/gallium/drivers/freedreno/freedreno_resource.c
+++ b/src/gallium/drivers/freedreno/freedreno_resource.c
@@ -516,12 +516,18 @@ fd_resource_transfer_map(struct pipe_context *pctx,
 
 		if (needs_flush) {
 			if (usage & PIPE_TRANSFER_WRITE) {
-				struct fd_batch *batch;
-				foreach_batch(batch, &ctx->screen->batch_cache, rsc->batch_mask)
-					fd_batch_flush(batch);
+				struct fd_batch *batch, *last_batch = NULL;
+				foreach_batch(batch, &ctx->screen->batch_cache, rsc->batch_mask) {
+					fd_batch_reference(&last_batch, batch);
+					fd_batch_flush(batch, false);
+				}
+				if (last_batch) {
+					fd_batch_sync(last_batch);
+					fd_batch_reference(&last_batch, NULL);
+				}
 				assert(rsc->batch_mask == 0);
 			} else {
-				fd_batch_flush(rsc->write_batch);
+				fd_batch_flush(rsc->write_batch, true);
 			}
 			assert(!rsc->write_batch);
 		}
@@ -1080,7 +1086,7 @@ fd_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 	struct fd_resource *rsc = fd_resource(prsc);
 
 	if (rsc->write_batch)
-		fd_batch_flush(rsc->write_batch);
+		fd_batch_flush(rsc->write_batch, true);
 
 	assert(!rsc->write_batch);
 }