freedreno/registers: Reintroduce FD_NO_DEPRECATED_PACK

The non-variant reg packers were removed in commit fd6489c026 ("tu:
Drop emitting of deprecated packing."), along with
FD_NO_DEPRECATED_PACK.

Add support to mark the even older reg builders as deprecated, and
re-introduce FD_NO_DEPRECATED_PACK to control this.

Signed-off-by: Rob Clark <rob.clark@oss.qualcomm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39029>

src/freedreno/common/freedreno_stompable_regs.h

@@ -8,6 +8,8 @@
 
 #include <stdint.h>
 
+#include "util/macros.h"
+
 #include "fd6_hw.h"
 
 /* In order to debug issues with usage of stale reg data we need to have
@@ -26,6 +28,9 @@
 static inline bool
 fd_reg_stomp_allowed(chip CHIP, uint16_t reg)
 {
+   PRAGMA_DIAGNOSTIC_PUSH
+   PRAGMA_DIAGNOSTIC_IGNORED_CLANG(-W#pragma-messages)
+
    switch (CHIP) {
    case A6XX: {
       switch (reg) {
@@ -77,6 +82,7 @@ fd_reg_stomp_allowed(chip CHIP, uint16_t reg)
    default: {
       UNREACHABLE("Unknown GPU");
    }
+   PRAGMA_DIAGNOSTIC_POP
    }
 
    return true;

src/freedreno/registers/gen_header.py

@@ -121,6 +121,10 @@ def tab_to(name, value):
         tab_count = 1
     print(name + ('\t' * tab_count) + value)
 
+def define_macro(name, value, has_variants):
+    if has_variants:
+        value = "__FD_DEPRECATED " + value
+    tab_to(name, value)
 
 def mask(low, high):
     return ((0xffffffffffffffff >> (64 - (high + 1 - low))) << low)
@@ -407,11 +411,13 @@ class Array(object):
             print("\t\tdefault: return INVALID_IDX(idx);")
             print("\t}\n}")
         if proto == '':
-            tab_to("#define REG_%s_%s" %
-                   (self.domain, self.name), "0x%08x\n" % array_offset)
+            define_macro("#define REG_%s_%s" %
+                         (self.domain, self.name), "0x%08x\n" % array_offset,
+                         has_variants)
         else:
-            tab_to("#define REG_%s_%s(%s)" % (self.domain, self.name,
-                   proto), "(0x%08x + %s )\n" % (array_offset, strides))
+            define_macro("#define REG_%s_%s(%s)" % (self.domain, self.name,
+                         proto), "(0x%08x + %s )\n" % (array_offset, strides),
+                         has_variants)
 
     def dump_pack_struct(self, has_variants):
         pass
@@ -466,10 +472,13 @@ class Reg(object):
         strides = indices_strides(self.indices())
         offset = self.total_offset()
         if proto == '':
-            tab_to("#define REG_%s" % self.full_name, "0x%08x" % offset)
+            define_macro("#define REG_%s" % self.full_name, "0x%08x" % offset, has_variants)
         elif not has_variants:
-            print("static CONSTEXPR inline uint32_t REG_%s(%s) { return 0x%08x + %s; }" % (
-                self.full_name, proto, offset, strides))
+            depcrstr = ""
+            if has_variants:
+                depcrstr = " __FD_DEPRECATED "
+            print("static CONSTEXPR inline%s uint32_t REG_%s(%s) { return 0x%08x + %s; }" % (
+                  depcrstr, self.full_name, proto, offset, strides))
 
         if self.bitset.inline:
             self.bitset.dump(has_variants, self.full_name, self)
@@ -980,6 +989,15 @@ def dump_c(args, guard, func):
     print("#endif")
     print()
 
+    # TODO figure out what to do about fd_reg_stomp_allowed()
+    # vs gcc.. for now only enable the warnings with clang:
+    print("#if defined(__clang__) && !defined(FD_NO_DEPRECATED_PACK)")
+    print("#define __FD_DEPRECATED _Pragma (\"GCC warning \\\"Deprecated reg builder\\\"\")")
+    print("#else")
+    print("#define __FD_DEPRECATED")
+    print("#endif")
+    print()
+
     func(p)
 
     print("#endif /* %s */" % guard)

src/freedreno/vulkan/meson.build

@@ -135,6 +135,9 @@ if freedreno_kmds.contains('virtio')
   tu_deps += dep_libdrm
 endif
 
+# Temporarily quiet deprecated warnings until turnip is converted:
+tu_flags += '-DFD_NO_DEPRECATED_PACK'
+
 tu_tracepoints = custom_target(
   'tu_tracepoints.[ch]',
   input: 'tu_tracepoints.py',