v3dv/build: meson infrastructure for multi-hw-version support

We follow the same approach that v3d. We compile the files that
depends on the version several times, passing a different version each
time. We link all those per-version libs on the main library.

Note that right now we only support version == 42, so the array of
supported versions is one-sized.

Also note that although we were doing a previous work to split
hw-version dependant code from general code, this is the first commit
that only inject the current V3D_VERSION on the former.

We have two cases where we hardcode the V3D_VERSION (as a full
wrapping would be an overkill) that we need to include here to avoid
warnings/errors if we do that before or after.

Having some exceptions also happens on v3d. As we are here we add some
comment on v3d clarifying that.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11310>

src/broadcom/vulkan/meson.build

@@ -25,6 +25,7 @@ v3dv_entrypoints = custom_target(
   command : [
     prog_python, '@INPUT0@', '--xml', '@INPUT1@', '--proto', '--weak',
     '--out-h', '@OUTPUT0@', '--out-c', '@OUTPUT1@', '--prefix', 'v3dv',
+    '--device-prefix', 'ver42',
   ],
   depend_files : vk_entrypoints_gen_depend_files,
 )
@@ -69,7 +70,9 @@ files_per_version = files(
 # The vulkan driver only supports version >= 42, which is the version present in
 # Rpi4. We need to explicitly set it as we are reusing pieces from the GL v3d
 # driver.
-v3dv_flags = ['-DV3D_VERSION=42']
+v3d_versions = ['42']
+
+v3dv_flags = []
 
 dep_v3dv3 = dependency('v3dv3', required : false)
 if dep_v3dv3.found()
@@ -107,9 +110,24 @@ if system_has_kms_drm and not with_platform_android
  libv3dv_files += files('v3dv_wsi_display.c')
 endif
 
+per_version_libs = []
+foreach ver : v3d_versions
+  per_version_libs += static_library(
+    'v3dv-v' + ver,
+    [files_per_version, v3d_xml_pack, v3dv_entrypoints[0]],
+    include_directories : [
+      inc_src, inc_include, inc_gallium, inc_gallium_aux, inc_broadcom,
+      inc_compiler, inc_util, inc_vulkan_wsi,
+    ],
+    c_args : [v3dv_flags, '-DV3D_VERSION=' + ver],
+    gnu_symbol_visibility : 'hidden',
+    dependencies : [v3dv_deps],
+)
+endforeach
+
 libvulkan_broadcom = shared_library(
   'vulkan_broadcom',
-  [libv3dv_files, files_per_version, v3dv_entrypoints, sha1_h],
+  [libv3dv_files, v3dv_entrypoints, sha1_h],
   include_directories : [
     inc_include, inc_src, inc_mapi, inc_mesa, inc_gallium, inc_gallium_aux, inc_broadcom, inc_compiler, inc_util, inc_vulkan_wsi,
   ],
@@ -117,6 +135,7 @@ libvulkan_broadcom = shared_library(
     libbroadcom_cle,
     libbroadcom_v3d,
     libvulkan_wsi,
+    per_version_libs,
   ],
   dependencies : v3dv_deps,
   c_args : v3dv_flags,

src/broadcom/vulkan/v3dv_cl.c

@@ -22,6 +22,13 @@
  */
 
 #include "v3dv_private.h"
+
+/* We don't expect that the packets we use in this file change across hw
+ * versions, so we just explicitly set the V3D_VERSION and include v3dx_pack
+ * here
+ */
+#define V3D_VERSION 33
+#include "broadcom/common/v3d_macros.h"
 #include "broadcom/cle/v3dx_pack.h"
 
 void

src/broadcom/vulkan/v3dv_uniforms.c

@@ -28,6 +28,12 @@
 #include "v3dv_private.h"
 #include "vk_format_info.h"
 
+/* The only version specific structure that we need is
+ * TMU_CONFIG_PARAMETER_1. This didn't seem to change significantly from
+ * previous V3D versions and we don't expect that to change, so for now let's
+ * just hardcode the V3D version here.
+ */
+#define V3D_VERSION 41
 #include "broadcom/common/v3d_macros.h"
 #include "broadcom/cle/v3dx_pack.h"
 

src/gallium/drivers/v3d/v3d_cl.c

@@ -24,7 +24,10 @@
 #include "util/u_math.h"
 #include "util/ralloc.h"
 #include "v3d_context.h"
-/* The branching packets are the same across V3D versions. */
+/* We don't expect that the packets we use in this file change across across
+ * hw versions, so we just explicitly set the V3D_VERSION and include
+ * v3dx_pack here
+ */
 #define V3D_VERSION 33
 #include "broadcom/common/v3d_macros.h"
 #include "broadcom/cle/v3dx_pack.h"

src/gallium/drivers/v3d/v3d_uniforms.c

@@ -27,6 +27,10 @@
 
 #include "v3d_context.h"
 #include "compiler/v3d_compiler.h"
+
+/* We don't expect that the packets we use in this file change across across
+ * hw versions, so we just include directly the v33 header
+ */
 #include "broadcom/cle/v3d_packet_v33_pack.h"
 
 static uint32_t