gallium: introduce get_shader_param (ALL DRIVERS CHANGED) (v3)

Changes in v3:
- Also change trace, which I forgot about

Changes in v2:
- No longer adds tessellation shaders

Currently each shader cap has FS and VS versions.

However, we want a version of them for geometry, tessellation control,
and tessellation evaluation shaders, and want to be able to easily
query a given cap type for a given shader stage.

Since having 5 duplicates of each shader cap is unmanageable, add
a new get_shader_param function that takes both a shader cap from a
new enum and a shader stage.

Drivers with non-unified shaders will first switch on the shader
and, within each case, switch on the cap.

Drivers with unified shaders instead first check whether the shader
is supported, and then switch on the cap.

MAX_CONST_BUFFERS is now per-stage.
The geometry shader cap is removed in favor of checking whether the
limit of geometry shader instructions is greater than 0, which is also
used for tessellation shaders.

WARNING: all drivers changed and compiled but only nvfx tested

1 files changed, 74 insertions, 45 deletions

diff --git a/src/gallium/drivers/nvfx/nvfx_screen.c b/src/gallium/drivers/nvfx/nvfx_screen.c
index 0290370d989..3f177b7ed07 100644
--- a/src/gallium/drivers/nvfx/nvfx_screen.c
+++ b/src/gallium/drivers/nvfx/nvfx_screen.c
@@ -58,8 +58,6 @@ nvfx_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 		return 1;
 	case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
 		return 0; /* We have 4 on nv40 - but unsupported currently */
-	case PIPE_CAP_TGSI_CONT_SUPPORTED:
-		return 0;
 	case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 		return screen->advertise_blend_equation_separate;
 	case PIPE_CAP_MAX_COMBINED_SAMPLERS:
@@ -77,49 +75,6 @@ nvfx_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 	case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 		return 1;
-	case PIPE_CAP_MAX_FS_INSTRUCTIONS:
-	case PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS:
-	case PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS:
-	case PIPE_CAP_MAX_FS_TEX_INDIRECTIONS:
-		return 4096;
-	case PIPE_CAP_MAX_FS_CONTROL_FLOW_DEPTH:
-		/* FIXME: is it the dynamic (nv30:0/nv40:24) or the static
-		   value (nv30:0/nv40:4) ? */
-		return screen->use_nv4x ? 4 : 0;
-	case PIPE_CAP_MAX_FS_INPUTS:
-		return screen->use_nv4x ? 12 : 10;
-	case PIPE_CAP_MAX_FS_CONSTS:
-		return screen->use_nv4x ? 224 : 32;
-	case PIPE_CAP_MAX_FS_TEMPS:
-		return 32;
-	case PIPE_CAP_MAX_FS_ADDRS:
-		return screen->use_nv4x ? 1 : 0;
-	case PIPE_CAP_MAX_FS_PREDS:
-		return 0; /* we could expose these, but nothing uses them */
-	case PIPE_CAP_MAX_VS_INSTRUCTIONS:
-	case PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS:
-		return screen->use_nv4x ? 512 : 256;
-	case PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS:
-	case PIPE_CAP_MAX_VS_TEX_INDIRECTIONS:
-		return screen->use_nv4x ? 512 : 0;
-	case PIPE_CAP_MAX_VS_CONTROL_FLOW_DEPTH:
-		/* FIXME: is it the dynamic (nv30:24/nv40:24) or the static
-		   value (nv30:1/nv40:4) ? */
-		return screen->use_nv4x ? 4 : 1;
-	case PIPE_CAP_MAX_VS_INPUTS:
-		return 16;
-	case PIPE_CAP_MAX_VS_CONSTS:
-		/* - 6 is for clip planes; Gallium should be fixed to put
-		 * them in the vertex shader itself, so we don't need to reserve these */
-		return (screen->use_nv4x ? 468 : 256) - 6;
-	case PIPE_CAP_MAX_VS_TEMPS:
-		return screen->use_nv4x ? 32 : 13;
-	case PIPE_CAP_MAX_VS_ADDRS:
-		return 2;
-	case PIPE_CAP_MAX_VS_PREDS:
-		return 0; /* we could expose these, but nothing uses them */
-	case PIPE_CAP_GEOMETRY_SHADER4:
-		return 0;
 	case PIPE_CAP_DEPTH_CLAMP:
 		return 0; // TODO: implement depth clamp
 	default:
@@ -128,6 +83,79 @@ nvfx_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	}
 }
 
+static int
+nvfx_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
+{
+	struct nvfx_screen *screen = nvfx_screen(pscreen);
+
+	switch(shader) {
+	case PIPE_SHADER_FRAGMENT:
+		switch(param) {
+		case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
+		case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
+		case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
+		case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
+			return 4096;
+		case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
+			/* FIXME: is it the dynamic (nv30:0/nv40:24) or the static
+			 value (nv30:0/nv40:4) ? */
+			return screen->use_nv4x ? 4 : 0;
+		case PIPE_SHADER_CAP_MAX_INPUTS:
+			return screen->use_nv4x ? 12 : 10;
+		case PIPE_SHADER_CAP_MAX_CONSTS:
+			return screen->use_nv4x ? 224 : 32;
+		case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
+		    return 1;
+		case PIPE_SHADER_CAP_MAX_TEMPS:
+			return 32;
+		case PIPE_SHADER_CAP_MAX_ADDRS:
+			return screen->use_nv4x ? 1 : 0;
+		case PIPE_SHADER_CAP_MAX_PREDS:
+			return 0; /* we could expose these, but nothing uses them */
+		case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
+		    return 0;
+		default:
+			break;
+		}
+		break;
+	case PIPE_SHADER_VERTEX:
+		switch(param) {
+		case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
+		case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
+			return screen->use_nv4x ? 512 : 256;
+		case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
+		case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
+			return screen->use_nv4x ? 512 : 0;
+		case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
+			/* FIXME: is it the dynamic (nv30:24/nv40:24) or the static
+			 value (nv30:1/nv40:4) ? */
+			return screen->use_nv4x ? 4 : 1;
+		case PIPE_SHADER_CAP_MAX_INPUTS:
+			return 16;
+		case PIPE_SHADER_CAP_MAX_CONSTS:
+			/* - 6 is for clip planes; Gallium should be fixed to put
+			 * them in the vertex shader itself, so we don't need to reserve these */
+			return (screen->use_nv4x ? 468 : 256) - 6;
+	             case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
+	                    return 1;
+		case PIPE_SHADER_CAP_MAX_TEMPS:
+			return screen->use_nv4x ? 32 : 13;
+		case PIPE_SHADER_CAP_MAX_ADDRS:
+			return 2;
+		case PIPE_SHADER_CAP_MAX_PREDS:
+			return 0; /* we could expose these, but nothing uses them */
+		case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
+                        return 1;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
 static float
 nvfx_screen_get_paramf(struct pipe_screen *pscreen, enum pipe_cap param)
 {
@@ -400,6 +428,7 @@ nvfx_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	pscreen->winsys = ws;
 	pscreen->destroy = nvfx_screen_destroy;
 	pscreen->get_param = nvfx_screen_get_param;
+	pscreen->get_shader_param = nvfx_screen_get_shader_param;
 	pscreen->get_paramf = nvfx_screen_get_paramf;
 	pscreen->is_format_supported = nvfx_screen_is_format_supported;
 	pscreen->context_create = nvfx_create;