1 files changed, 153 insertions, 0 deletions
diff --git a/src/gallium/drivers/nvfx/nvfx_buffer.c b/src/gallium/drivers/nvfx/nvfx_buffer.c
new file mode 100644
index 0000000000..24e0a0c7f6
--- /dev/null
+++ b/src/gallium/drivers/nvfx/nvfx_buffer.c
@@ -0,0 +1,153 @@
+
+#include "util/u_inlines.h"
+#include "util/u_memory.h"
+#include "util/u_math.h"
+
+#include "nouveau/nouveau_screen.h"
+#include "nouveau/nouveau_winsys.h"
+#include "nvfx_resource.h"
+
+
+/* Currently using separate implementations for buffers and textures,
+ * even though gallium has a unified abstraction of these objects.
+ * Eventually these should be combined, and mechanisms like transfers
+ * be adapted to work for both buffer and texture uploads.
+ */
+static void nvfx_buffer_destroy(struct pipe_screen *pscreen,
+				struct pipe_resource *presource)
+{
+	struct nvfx_resource *buffer = nvfx_resource(presource);
+
+	nouveau_screen_bo_release(pscreen, buffer->bo);
+	FREE(buffer);
+}
+
+
+
+
+/* Utility functions for transfer create/destroy are hooked in and
+ * just record the arguments to those functions.
+ */
+static void *
+nvfx_buffer_transfer_map( struct pipe_context *pipe,
+			  struct pipe_transfer *transfer )
+{
+	struct nvfx_resource *buffer = nvfx_resource(transfer->resource);
+	uint8_t *map;
+
+	map = nouveau_screen_bo_map_range( pipe->screen,
+					   buffer->bo,
+					   transfer->box.x,
+					   transfer->box.width,
+					   nouveau_screen_transfer_flags(transfer->usage) );
+	if (map == NULL)
+		return NULL;
+	
+	return map + transfer->box.x;
+}
+
+
+
+static void nvfx_buffer_transfer_flush_region( struct pipe_context *pipe,
+					       struct pipe_transfer *transfer,
+					       const struct pipe_box *box)
+{
+	struct nvfx_resource *buffer = nvfx_resource(transfer->resource);
+
+	nouveau_screen_bo_map_flush_range(pipe->screen,
+					  buffer->bo,
+					  transfer->box.x + box->x,
+					  box->width);
+}
+
+static void nvfx_buffer_transfer_unmap( struct pipe_context *pipe,
+					struct pipe_transfer *transfer )
+{
+	struct nvfx_resource *buffer = nvfx_resource(transfer->resource);
+
+	nouveau_screen_bo_unmap(pipe->screen, buffer->bo);
+}
+
+
+
+
+struct u_resource_vtbl nvfx_buffer_vtbl = 
+{
+	u_default_resource_get_handle,      /* get_handle */
+	nvfx_buffer_destroy,		     /* resource_destroy */
+	NULL,			    /* is_resource_referenced */
+	u_default_get_transfer,	     /* get_transfer */
+	u_default_transfer_destroy,	     /* transfer_destroy */
+	nvfx_buffer_transfer_map,	     /* transfer_map */
+	nvfx_buffer_transfer_flush_region,  /* transfer_flush_region */
+	nvfx_buffer_transfer_unmap,	     /* transfer_unmap */
+	u_default_transfer_inline_write   /* transfer_inline_write */
+};
+
+
+
+struct pipe_resource *
+nvfx_buffer_create(struct pipe_screen *pscreen,
+		   const struct pipe_resource *template)
+{
+	struct nvfx_resource *buffer;
+
+	buffer = CALLOC_STRUCT(nvfx_resource);
+	if (!buffer)
+		return NULL;
+
+	buffer->base = *template;
+	buffer->vtbl = &nvfx_buffer_vtbl;
+	pipe_reference_init(&buffer->base.reference, 1);
+	buffer->base.screen = pscreen;
+
+	buffer->bo = nouveau_screen_bo_new(pscreen,
+					   16,
+					   buffer->base._usage,
+					   buffer->base.bind,
+					   buffer->base.width0);
+
+	if (buffer->bo == NULL)
+		goto fail;
+
+	return &buffer->base;
+
+fail:
+	FREE(buffer);
+	return NULL;
+}
+
+
+struct pipe_resource *
+nvfx_user_buffer_create(struct pipe_screen *pscreen,
+			void *ptr,
+			unsigned bytes,
+			unsigned usage)
+{
+	struct nvfx_resource *buffer;
+
+	buffer = CALLOC_STRUCT(nvfx_resource);
+	if (!buffer)
+		return NULL;
+
+	pipe_reference_init(&buffer->base.reference, 1);
+	buffer->vtbl = &nvfx_buffer_vtbl;
+	buffer->base.screen = pscreen;
+	buffer->base.format = PIPE_FORMAT_R8_UNORM;
+	buffer->base._usage = PIPE_USAGE_IMMUTABLE;
+	buffer->base.bind = usage;
+	buffer->base.width0 = bytes;
+	buffer->base.height0 = 1;
+	buffer->base.depth0 = 1;
+
+	buffer->bo = nouveau_screen_bo_user(pscreen, ptr, bytes);
+	if (!buffer->bo)
+		goto fail;
+	
+	return &buffer->base;
+
+fail:
+	FREE(buffer);
+	return NULL;
+}
+