1 files changed, 117 insertions, 0 deletions
diff --git a/lib/intel_batchbuffer.h b/lib/intel_batchbuffer.h
new file mode 100644
index 00000000..d2238309
--- /dev/null
+++ b/lib/intel_batchbuffer.h
@@ -0,0 +1,117 @@
+#ifndef INTEL_BATCHBUFFER_H
+#define INTEL_BATCHBUFFER_H
+
+#include "intel_bufmgr.h"
+#include "i810_reg.h"
+
+#define BATCH_SZ 4096
+#define BATCH_RESERVED 16
+
+struct intel_batchbuffer
+{
+	drm_intel_bufmgr *bufmgr;
+
+	drm_intel_bo *bo;
+
+	uint8_t *buffer;
+
+	uint8_t *map;
+	uint8_t *ptr;
+
+	/* debug stuff */
+	struct {
+		uint8_t *start_ptr;
+		unsigned int total;
+	} emit;
+
+	unsigned int size;
+};
+
+struct intel_batchbuffer *intel_batchbuffer_alloc(drm_intel_bufmgr *bufmgr);
+
+void intel_batchbuffer_free(struct intel_batchbuffer *batch);
+
+
+void intel_batchbuffer_flush(struct intel_batchbuffer *batch);
+
+void intel_batchbuffer_reset(struct intel_batchbuffer *batch);
+
+void intel_batchbuffer_data(struct intel_batchbuffer *batch,
+                            const void *data, unsigned int bytes);
+
+void intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
+				  drm_intel_bo *buffer,
+				  uint32_t delta,
+				  uint32_t read_domains,
+				  uint32_t write_domain);
+
+/* Inline functions - might actually be better off with these
+ * non-inlined.  Certainly better off switching all command packets to
+ * be passed as structs rather than dwords, but that's a little bit of
+ * work...
+ */
+static inline int
+intel_batchbuffer_space(struct intel_batchbuffer *batch)
+{
+	return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
+}
+
+
+static inline void
+intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, uint32_t dword)
+{
+	assert(batch->map);
+	assert(intel_batchbuffer_space(batch) >= 4);
+	*(uint32_t *) (batch->ptr) = dword;
+	batch->ptr += 4;
+}
+
+static inline void
+intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
+                                unsigned int sz)
+{
+	assert(sz < batch->size - 8);
+	if (intel_batchbuffer_space(batch) < sz)
+		intel_batchbuffer_flush(batch);
+}
+
+/* Here are the crusty old macros, to be removed:
+ */
+#define BATCH_LOCALS
+
+#define BEGIN_BATCH(n) do {						\
+	intel_batchbuffer_require_space(batch, (n)*4);			\
+	assert(batch->emit.start_ptr == NULL);				\
+	batch->emit.total = (n) * 4;					\
+	batch->emit.start_ptr = batch->ptr;				\
+} while (0)
+
+#define OUT_BATCH(d) intel_batchbuffer_emit_dword(batch, d)
+
+#define OUT_RELOC(buf, read_domains, write_domain, delta) do {		\
+	assert((delta) >= 0);						\
+	intel_batchbuffer_emit_reloc(batch, buf, delta,			\
+				     read_domains, write_domain);	\
+} while (0)
+
+#define ADVANCE_BATCH() do {						\
+	unsigned int _n = batch->ptr - batch->emit.start_ptr;		\
+	assert(batch->emit.start_ptr != NULL);				\
+	if (_n != batch->emit.total) {					\
+		fprintf(stderr,						\
+			"ADVANCE_BATCH: %d of %d dwords emitted\n",	\
+			_n, batch->emit.total);				\
+		abort();						\
+	}								\
+	batch->emit.start_ptr = NULL;					\
+} while(0)
+
+
+static inline void
+intel_batchbuffer_emit_mi_flush(struct intel_batchbuffer *batch)
+{
+	intel_batchbuffer_require_space(batch, 4);
+	intel_batchbuffer_emit_dword(batch, MI_FLUSH);
+}
+
+#endif