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

3 files changed, 21 insertions, 11 deletions

diff --git a/src/gallium/auxiliary/util/u_caps.c b/src/gallium/auxiliary/util/u_caps.c
index 94d5bd30278..f6a87869c76 100644
--- a/src/gallium/auxiliary/util/u_caps.c
+++ b/src/gallium/auxiliary/util/u_caps.c
@@ -75,6 +75,13 @@ util_check_caps_out(struct pipe_screen *screen, const unsigned *list, int *out)
             return FALSE;
          }
          break;
+      case UTIL_CAPS_CHECK_SHADER:
+         tmpi = screen->get_shader_param(screen, list[i] >> 24, list[i] & ((1 << 24) - 1));
+         ++i;
+         if (tmpi < (int)list[i++]) {
+            *out = i - 3;
+            return FALSE;
+         }
       case UTIL_CAPS_CHECK_UNIMPLEMENTED:
          *out = i - 1;
          return FALSE;
@@ -188,17 +195,17 @@ static unsigned caps_opengl_2_1[] = {
 
 /* Shader Model 3 */
 static unsigned caps_sm3[] = {
-    UTIL_CHECK_INT(MAX_FS_INSTRUCTIONS, 512),
-    UTIL_CHECK_INT(MAX_FS_INPUTS, 10),
-    UTIL_CHECK_INT(MAX_FS_TEMPS, 32),
-    UTIL_CHECK_INT(MAX_FS_ADDRS, 1),
-    UTIL_CHECK_INT(MAX_FS_CONSTS, 224),
+    UTIL_CHECK_SHADER(FRAGMENT, MAX_INSTRUCTIONS, 512),
+    UTIL_CHECK_SHADER(FRAGMENT, MAX_INPUTS, 10),
+    UTIL_CHECK_SHADER(FRAGMENT, MAX_TEMPS, 32),
+    UTIL_CHECK_SHADER(FRAGMENT, MAX_ADDRS, 1),
+    UTIL_CHECK_SHADER(FRAGMENT, MAX_CONSTS, 224),
 
-    UTIL_CHECK_INT(MAX_VS_INSTRUCTIONS, 512),
-    UTIL_CHECK_INT(MAX_VS_INPUTS, 16),
-    UTIL_CHECK_INT(MAX_VS_TEMPS, 32),
-    UTIL_CHECK_INT(MAX_VS_ADDRS, 2),
-    UTIL_CHECK_INT(MAX_VS_CONSTS, 256),
+    UTIL_CHECK_SHADER(VERTEX, MAX_INSTRUCTIONS, 512),
+    UTIL_CHECK_SHADER(VERTEX, MAX_INPUTS, 16),
+    UTIL_CHECK_SHADER(VERTEX, MAX_TEMPS, 32),
+    UTIL_CHECK_SHADER(VERTEX, MAX_ADDRS, 2),
+    UTIL_CHECK_SHADER(VERTEX, MAX_CONSTS, 256),
 
     UTIL_CHECK_TERMINATE
 };
diff --git a/src/gallium/auxiliary/util/u_caps.h b/src/gallium/auxiliary/util/u_caps.h
index b1074f9eb21..7bd23800414 100644
--- a/src/gallium/auxiliary/util/u_caps.h
+++ b/src/gallium/auxiliary/util/u_caps.h
@@ -38,6 +38,7 @@ enum u_caps_check_enum {
    UTIL_CAPS_CHECK_INT,
    UTIL_CAPS_CHECK_FLOAT,
    UTIL_CAPS_CHECK_FORMAT,
+   UTIL_CAPS_CHECK_SHADER,
    UTIL_CAPS_CHECK_UNIMPLEMENTED,
 };
 
@@ -54,6 +55,9 @@ enum u_caps_check_enum {
 #define UTIL_CHECK_FORMAT(format) \
    UTIL_CAPS_CHECK_FORMAT, PIPE_FORMAT_##format
 
+#define UTIL_CHECK_SHADER(shader, cap, higher) \
+   UTIL_CAPS_CHECK_SHADER, (PIPE_SHADER_##shader << 24) | PIPE_SHADER_CAP_##cap, (unsigned)(higher)
+
 #define UTIL_CHECK_UNIMPLEMENTED \
    UTIL_CAPS_CHECK_UNIMPLEMENTED
 
diff --git a/src/gallium/auxiliary/util/u_inlines.h b/src/gallium/auxiliary/util/u_inlines.h
index 78473bf35ac..6ed39561fbe 100644
--- a/src/gallium/auxiliary/util/u_inlines.h
+++ b/src/gallium/auxiliary/util/u_inlines.h
@@ -399,7 +399,6 @@ static INLINE boolean util_get_offset(
    }
 }
 
-
 #ifdef __cplusplus
 }
 #endif