Initial import of intel-graphics-tools with some microbenchmarks.

lib/intel_batchbuffer.c

@@ -0,0 +1,139 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#include <inttypes.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "drm.h"
+#include "intel_batchbuffer.h"
+#include "intel_bufmgr.h"
+
+void
+intel_batchbuffer_reset(struct intel_batchbuffer *batch)
+{
+	if (batch->bo != NULL) {
+		drm_intel_bo_unreference(batch->bo);
+		batch->bo = NULL;
+	}
+
+	if (!batch->buffer)
+		batch->buffer = malloc(BATCH_SZ);
+
+	batch->bo = drm_intel_bo_alloc(batch->bufmgr, "batchbuffer",
+				       BATCH_SZ, 4096);
+
+	batch->map = batch->buffer;
+	batch->size = BATCH_SZ;
+	batch->ptr = batch->map;
+}
+
+struct intel_batchbuffer *
+intel_batchbuffer_alloc(drm_intel_bufmgr *bufmgr)
+{
+	struct intel_batchbuffer *batch = calloc(sizeof(*batch), 1);
+
+	batch->bufmgr = bufmgr;
+	intel_batchbuffer_reset(batch);
+
+	return batch;
+}
+
+void
+intel_batchbuffer_free(struct intel_batchbuffer *batch)
+{
+	free (batch->buffer);
+
+	drm_intel_bo_unreference(batch->bo);
+	batch->bo = NULL;
+	free(batch);
+}
+
+void
+intel_batchbuffer_flush(struct intel_batchbuffer *batch)
+{
+	unsigned int used = batch->ptr - batch->map;
+	int ret;
+
+	if (used == 0)
+		return;
+
+	/* Round batchbuffer usage to 2 DWORDs. */
+	if ((used & 4) == 0) {
+		*(uint32_t *) (batch->ptr) = 0; /* noop */
+		batch->ptr += 4;
+		used = batch->ptr - batch->map;
+	}
+
+	/* Mark the end of the buffer. */
+	*(uint32_t *) (batch->ptr) = MI_BATCH_BUFFER_END; /* noop */
+	batch->ptr += 4;
+	used = batch->ptr - batch->map;
+
+	drm_intel_bo_subdata(batch->bo, 0, used, batch->buffer);
+
+	batch->map = NULL;
+	batch->ptr = NULL;
+
+	ret = drm_intel_bo_exec(batch->bo, used, NULL, 0, 0);
+	assert(ret == 0);
+
+	intel_batchbuffer_reset(batch);
+}
+
+
+/*  This is the only way buffers get added to the validate list.
+ */
+void
+intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
+                             drm_intel_bo *buffer, uint32_t delta,
+			     uint32_t read_domains, uint32_t write_domain)
+{
+	int ret;
+
+	if (batch->ptr - batch->map > batch->bo->size)
+		printf("bad relocation ptr %p map %p offset %d size %ld\n",
+		       batch->ptr, batch->map, batch->ptr - batch->map,
+		       batch->bo->size);
+
+	ret = drm_intel_bo_emit_reloc(batch->bo, batch->ptr - batch->map,
+				      buffer, delta,
+				      read_domains, write_domain);
+	intel_batchbuffer_emit_dword(batch, buffer->offset + delta);
+	assert(ret == 0);
+}
+
+void
+intel_batchbuffer_data(struct intel_batchbuffer *batch,
+                       const void *data, unsigned int bytes)
+{
+	assert((bytes & 3) == 0);
+	intel_batchbuffer_require_space(batch, bytes);
+	memcpy(batch->ptr, data, bytes);
+	batch->ptr += bytes;
+}