context: libdrm wrappers

This wraps libdrm functionality to exec with contexts. This patch
shouldn't be applied until libdrm for contexts is updated.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>

2 files changed, 38 insertions, 4 deletions

diff --git a/lib/intel_batchbuffer.c b/lib/intel_batchbuffer.c
index 3fcc578..bcbdf61 100644
--- a/lib/intel_batchbuffer.c
+++ b/lib/intel_batchbuffer.c
@@ -75,13 +75,13 @@ intel_batchbuffer_free(struct intel_batchbuffer *batch)
 
 #define CMD_POLY_STIPPLE_OFFSET       0x7906
 
-void
-intel_batchbuffer_flush_on_ring(struct intel_batchbuffer *batch, int ring)
+static unsigned int
+flush_on_ring_common(struct intel_batchbuffer *batch, int ring)
 {
 	unsigned int used = batch->ptr - batch->buffer;
 
 	if (used == 0)
-		return;
+		return 0;
 
 	if (IS_GEN5(batch->devid)) {
 		/* emit gen5 w/a without batch space checks - we reserve that
@@ -100,7 +100,17 @@ intel_batchbuffer_flush_on_ring(struct intel_batchbuffer *batch, int ring)
 	/* Mark the end of the buffer. */
 	*(uint32_t *)(batch->ptr) = MI_BATCH_BUFFER_END; /* noop */
 	batch->ptr += 4;
-	used = batch->ptr - batch->buffer;
+	return batch->ptr - batch->buffer;
+}
+
+void
+intel_batchbuffer_flush_on_ring(struct intel_batchbuffer *batch, int ring)
+{
+	int ret;
+	unsigned int used = flush_on_ring_common(batch, ring);
+
+	if (used == 0)
+		return;
 
 	do_or_die(drm_intel_bo_subdata(batch->bo, 0, used, batch->buffer));
 
@@ -112,6 +122,28 @@ intel_batchbuffer_flush_on_ring(struct intel_batchbuffer *batch, int ring)
 }
 
 void
+intel_batchbuffer_flush_with_context(struct intel_batchbuffer *batch,
+				     drm_intel_context *context)
+{
+	int ret;
+	unsigned int used = flush_on_ring_common(batch, I915_EXEC_RENDER);
+
+	if (used == 0)
+		return;
+
+	ret = drm_intel_bo_subdata(batch->bo, 0, used, batch->buffer);
+	assert(ret == 0);
+
+	batch->ptr = NULL;
+
+	ret = drm_intel_gem_bo_context_exec(batch->bo, context, used,
+					    I915_EXEC_RENDER);
+	assert(ret == 0);
+
+	intel_batchbuffer_reset(batch);
+}
+
+void
 intel_batchbuffer_flush(struct intel_batchbuffer *batch)
 {
 	int ring = 0;
diff --git a/lib/intel_batchbuffer.h b/lib/intel_batchbuffer.h
index 7ea1368..ba0934c 100644
--- a/lib/intel_batchbuffer.h
+++ b/lib/intel_batchbuffer.h
@@ -25,6 +25,8 @@ void intel_batchbuffer_free(struct intel_batchbuffer *batch);
 
 void intel_batchbuffer_flush(struct intel_batchbuffer *batch);
 void intel_batchbuffer_flush_on_ring(struct intel_batchbuffer *batch, int ring);
+void intel_batchbuffer_flush_with_context(struct intel_batchbuffer *batch,
+					  drm_intel_context *context);
 
 void intel_batchbuffer_reset(struct intel_batchbuffer *batch);