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, 38 insertions, 26 deletions

diff --git a/src/gallium/drivers/nv50/nv50_screen.c b/src/gallium/drivers/nv50/nv50_screen.c
index ca4b01b12b..f37dd079ac 100644
--- a/src/gallium/drivers/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nv50/nv50_screen.c
@@ -142,8 +142,6 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 	case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 		return 1;
-	case PIPE_CAP_TGSI_CONT_SUPPORTED:
-		return 1;
 	case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 		return 1;
 	case PIPE_CAP_INDEP_BLEND_ENABLE:
@@ -158,38 +156,51 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 	case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 		return 0;
-	case PIPE_CAP_MAX_VS_INSTRUCTIONS:
-	case PIPE_CAP_MAX_FS_INSTRUCTIONS:
-	case PIPE_CAP_MAX_VS_ALU_INSTRUCTIONS:
-	case PIPE_CAP_MAX_FS_ALU_INSTRUCTIONS:
-	case PIPE_CAP_MAX_VS_TEX_INSTRUCTIONS:
-	case PIPE_CAP_MAX_FS_TEX_INSTRUCTIONS:
-	case PIPE_CAP_MAX_VS_TEX_INDIRECTIONS:
-	case PIPE_CAP_MAX_FS_TEX_INDIRECTIONS: /* arbitrary limit */
+	case PIPE_CAP_DEPTH_CLAMP:
+		return 1;
+	default:
+		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
+		return 0;
+	}
+}
+
+static int
+nv50_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
+{
+	switch(shader)
+	{
+	case PIPE_SHADER_FRAGMENT:
+	case PIPE_SHADER_VERTEX:
+	case PIPE_SHADER_GEOMETRY:
+		break;
+	default:
+		return 0;
+	}
+
+	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: /* arbitrary limit */
 		return 16384;
-	case PIPE_CAP_MAX_VS_CONTROL_FLOW_DEPTH:
-	case PIPE_CAP_MAX_FS_CONTROL_FLOW_DEPTH: /* need stack bo */
+	case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH: /* need stack bo */
 		return 4;
-	case PIPE_CAP_MAX_VS_INPUTS:
-		return 16;
-	case PIPE_CAP_MAX_FS_INPUTS: /* 128 / 4 with GP */
-		return 64 / 4;
-	case PIPE_CAP_MAX_VS_CONSTS:
-	case PIPE_CAP_MAX_FS_CONSTS:
+	case PIPE_SHADER_CAP_MAX_INPUTS: /* 128 / 4 with GP */
+		if(shader == PIPE_SHADER_GEOMETRY)
+			return 128 / 4;
+		else
+			return 64 / 4;
+	case PIPE_SHADER_CAP_MAX_CONSTS:
 		return 65536 / 16;
-	case PIPE_CAP_MAX_VS_ADDRS:
-	case PIPE_CAP_MAX_FS_ADDRS: /* no spilling atm */
+	case PIPE_SHADER_CAP_MAX_ADDRS: /* no spilling atm */
 		return 1;
-	case PIPE_CAP_MAX_VS_PREDS:
-	case PIPE_CAP_MAX_FS_PREDS: /* not yet handled */
+	case PIPE_SHADER_CAP_MAX_PREDS: /* not yet handled */
 		return 0;
-	case PIPE_CAP_MAX_VS_TEMPS:
-	case PIPE_CAP_MAX_FS_TEMPS: /* no spilling atm */
+	case PIPE_SHADER_CAP_MAX_TEMPS: /* no spilling atm */
 		return 128 / 4;
-	case PIPE_CAP_DEPTH_CLAMP:
+	case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 		return 1;
 	default:
-		NOUVEAU_ERR("Unknown PIPE_CAP %d\n", param);
 		return 0;
 	}
 }
@@ -315,6 +326,7 @@ nv50_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 	pscreen->winsys = ws;
 	pscreen->destroy = nv50_screen_destroy;
 	pscreen->get_param = nv50_screen_get_param;
+	pscreen->get_shader_param = nv50_screen_get_shader_param;
 	pscreen->get_paramf = nv50_screen_get_paramf;
 	pscreen->is_format_supported = nv50_screen_is_format_supported;
 	pscreen->context_create = nv50_create;