mesa: add option to enable virtgpu_kumquat FFI for gfxstream

Will be used by Cuttlefish CI/CD, but also commonly used by
gfxstream developers.

meson setup gfxstream-build -Dvulkan-drivers="gfxstream" -Dgallium-drivers="" -Dvirtgpu_kumquat=true -Dopengl=false -Drust_std=2021

In distros, virtgpu_kumquat is not expected to be packaged since
it is a CI/CD tool.

Reviewed-by: Aaron Ruby <aruby@qnx.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35210>

meson.build

@@ -736,7 +736,8 @@ if with_gallium_rusticl
   endif
 endif
 
-if with_gallium_rusticl or with_nouveau_vk or with_tools.contains('etnaviv')
+with_virtgpu_kumquat = get_option('virtgpu_kumquat') and with_gfxstream_vk
+if with_gallium_rusticl or with_nouveau_vk or with_tools.contains('etnaviv') or with_virtgpu_kumquat
   # rust.bindgen() does not pass `--rust-target` to bindgen until 1.7.0.
   if meson.version().version_compare('< 1.7.0')
     error('Mesa Rust support requires Meson 1.7.0 or newer')

meson.options

@@ -840,3 +840,10 @@ option(
   ],
   description : 'Allows the fallback mechanism if the dependency is not available on the system, or too old.'
 )
+
+option(
+  'virtgpu_kumquat',
+  type : 'boolean',
+  value : false,
+  description : 'Build virtgpu_kumquat (only useful with gfxstream currently)'
+)

src/gfxstream/guest/meson.build

@@ -24,16 +24,6 @@ endif
 # Include the gfxstream private VkStructureType definitions
 gfxstream_guest_args += '-DVK_GFXSTREAM_STRUCTURE_TYPE_EXT'
 
-#===============#
-# Dependencies  #
-#===============#
-
-with_kumquat = false
-virtgpu_kumquat_dep = dependency('virtgpu_kumquat_ffi', required: false)
-if virtgpu_kumquat_dep.found()
-  with_kumquat = true
-endif
-
 #===============#
 # Includes      #
 #===============#

src/gfxstream/guest/platform/kumquat/VirtGpuKumquat.h

@@ -8,12 +8,7 @@
 #include "GfxStreamVulkanMapper.h"
 #include "VirtGpu.h"
 
-// Blueprint and Meson builds place things differently
-#if defined(ANDROID)
 #include "virtgpu_kumquat_ffi.h"
-#else
-#include "virtgpu_kumquat/virtgpu_kumquat_ffi.h"
-#endif
 
 class VirtGpuKumquatResource : public std::enable_shared_from_this<VirtGpuKumquatResource>,
                                public VirtGpuResource {

src/gfxstream/guest/platform/kumquat/meson.build

@@ -1,7 +1,7 @@
 # Copyright 2022 Android Open Source Project
 # SPDX-License-Identifier: MIT
 
-if with_kumquat
+if with_virtgpu_kumquat
   files_libplatform_virtgpu_kumquat = files(
     'VirtGpuKumquatDevice.cpp',
     'VirtGpuKumquatBlobMapping.cpp',
@@ -17,7 +17,7 @@ libplatform_virtgpu_kumquat = static_library(
    files_libplatform_virtgpu_kumquat,
    cpp_args: gfxstream_guest_args,
    include_directories: [inc_platform_virtgpu, inc_src, inc_gfxstream_vulkan_mapper,
-                         inc_vulkan_util, inc_include],
-   link_with: [libgfxstream_vulkan_mapper],
-   dependencies: [idep_vulkan_util_headers, virtgpu_kumquat_dep],
+                         inc_vulkan_util, inc_include, inc_virtgpu_kumquat_ffi],
+   link_with: [libgfxstream_vulkan_mapper, libvirtgpu_kumquat_ffi],
+   dependencies: [idep_vulkan_util_headers],
 )

src/meson.build

@@ -100,6 +100,12 @@ if with_any_nouveau
   subdir('nouveau')
 endif
 if with_gfxstream_vk
+  if with_virtgpu_kumquat
+    subdir('util/rust')
+    subdir('virtio/protocols')
+    subdir('virtio/virtgpu_kumquat')
+    subdir('virtio/virtgpu_kumquat_ffi')
+  endif
   subdir('gfxstream')
 endif
 if with_gallium_asahi or with_asahi_vk or with_tools.contains('asahi')