nvfx: rewrite draw code and buffer code

This is a full rewrite of the drawing and buffer management logic.

It offers a lot of improvements:
1. A copy of buffers is now always kept in system memory. This is
   necessary to allow software processing of them, which is necessary
   or improves performance in many cases.
2. Support for pushing vertices on the FIFO, with index lookup if necessary.
3. "Smart" draw code that tries to intelligently choose the cheapest
  way to draw something: whether to use inline vertices or hardware
  vertex buffer, and whether to use hardware index buffers
4. Support for all vertex formats supported by the hardware
5. Usage of translate to push vertices, supporting all formats that are
   sensible to use as vertex formats
6. Support for base vertex
7. Usage of Ben Skeggs' primitive splitter originally for nv50, allowing
   correct splitting of line loops, triangle fans, etc.
8. Support for instancing
9. Precomputation using the vertex elements CSO

Thanks to Ben Skeggs for his primitive splitter originally for nv50.

Thanks to Christoph Bumiller for his nv50 push code, that was the basis
of this work, even though I changed his code dramatically, in particular
to replace his ad-hoc vertex data emitter with translate.

The changes could also go into nv50 too, but there are substantial
differences due to the additional nv50 hardware features.

1 files changed, 27 insertions, 6 deletions

diff --git a/src/gallium/drivers/nvfx/nvfx_screen.c b/src/gallium/drivers/nvfx/nvfx_screen.c
index a1b8361a9a..7e3caf8d2e 100644
--- a/src/gallium/drivers/nvfx/nvfx_screen.c
+++ b/src/gallium/drivers/nvfx/nvfx_screen.c
@@ -163,11 +163,11 @@ nvfx_screen_get_paramf(struct pipe_screen *pscreen, enum pipe_cap param)
 }
 
 static boolean
-nvfx_screen_surface_format_supported(struct pipe_screen *pscreen,
+nvfx_screen_is_format_supported(struct pipe_screen *pscreen,
 				     enum pipe_format format,
 				     enum pipe_texture_target target,
 				     unsigned sample_count,
-				     unsigned tex_usage, unsigned geom_flags)
+				     unsigned bind, unsigned geom_flags)
 {
 	struct nvfx_screen *screen = nvfx_screen(pscreen);
 	struct pipe_surface *front = ((struct nouveau_winsys *) pscreen->winsys)->front;
@@ -175,7 +175,7 @@ nvfx_screen_surface_format_supported(struct pipe_screen *pscreen,
 	 if (sample_count > 1)
 		return FALSE;
 
-	if (tex_usage & PIPE_BIND_RENDER_TARGET) {
+	if (bind & PIPE_BIND_RENDER_TARGET) {
 		switch (format) {
 		case PIPE_FORMAT_B8G8R8A8_UNORM:
 		case PIPE_FORMAT_B8G8R8X8_UNORM:
@@ -186,7 +186,7 @@ nvfx_screen_surface_format_supported(struct pipe_screen *pscreen,
 		}
 	}
 
-	if (tex_usage & PIPE_BIND_DEPTH_STENCIL) {
+	if (bind & PIPE_BIND_DEPTH_STENCIL) {
 		switch (format) {
 		case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 		case PIPE_FORMAT_X8Z24_UNORM:
@@ -201,7 +201,7 @@ nvfx_screen_surface_format_supported(struct pipe_screen *pscreen,
 		}
 	}
 
-	if (tex_usage & PIPE_BIND_SAMPLER_VIEW) {
+	if (bind & PIPE_BIND_SAMPLER_VIEW) {
 		struct nvfx_texture_format* tf = &nvfx_texture_formats[format];
 		if(util_format_is_s3tc(format) && !util_format_s3tc_enabled)
 			return FALSE;
@@ -218,6 +218,22 @@ nvfx_screen_surface_format_supported(struct pipe_screen *pscreen,
 		}
 	}
 
+	// note that we do actually support everything through translate
+	if (bind & PIPE_BIND_VERTEX_BUFFER) {
+		unsigned type = nvfx_vertex_formats[format];
+		if(!type)
+			return FALSE;
+	}
+
+	if (bind & PIPE_BIND_INDEX_BUFFER) {
+		// 8-bit indices supported, but not in hardware index buffer
+		if(format != PIPE_FORMAT_R16_USCALED && format != PIPE_FORMAT_R32_USCALED)
+			return FALSE;
+	}
+
+	if(bind & PIPE_BIND_STREAM_OUTPUT)
+		return FALSE;
+
 	return TRUE;
 }
 
@@ -387,7 +403,7 @@ nvfx_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	pscreen->destroy = nvfx_screen_destroy;
 	pscreen->get_param = nvfx_screen_get_param;
 	pscreen->get_paramf = nvfx_screen_get_paramf;
-	pscreen->is_format_supported = nvfx_screen_surface_format_supported;
+	pscreen->is_format_supported = nvfx_screen_is_format_supported;
 	pscreen->context_create = nvfx_create;
 
 	switch (dev->chipset & 0xf0) {
@@ -419,6 +435,11 @@ nvfx_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	}
 
 	screen->force_swtnl = debug_get_bool_option("NOUVEAU_SWTNL", FALSE);
+	screen->trace_draw = debug_get_bool_option("NVFX_TRACE_DRAW", FALSE);
+
+	screen->buffer_allocation_cost = debug_get_num_option("NVFX_BUFFER_ALLOCATION_COST", 16384);
+	screen->inline_cost_per_hardware_cost = atof(debug_get_option("NVFX_INLINE_COST_PER_HARDWARE_COST", "1.0"));
+	screen->static_reuse_threshold = atof(debug_get_option("NVFX_STATIC_REUSE_THRESHOLD", "2.0"));
 
 	screen->vertex_buffer_reloc_flags = nvfx_screen_get_vertex_buffer_flags(screen);