d3d12: Compute UUIDs required by external objects extension

Reviewed-by: Bill Kristiansen <billkris@microsoft.com>
Reviewed-by: Giancarlo Devich <gdevich@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17446>

src/gallium/drivers/d3d12/d3d12_screen.cpp

@@ -42,11 +42,13 @@
 #include "util/u_memory.h"
 #include "util/u_screen.h"
 #include "util/u_dl.h"
+#include "util/mesa-sha1.h"
 
 #include "nir.h"
 #include "frontend/sw_winsys.h"
 
 #include "nir_to_dxil.h"
+#include "git_sha1.h"
 
 #include <directx/d3d12sdklayers.h>
 
@@ -1311,6 +1313,28 @@ d3d12_init_screen(struct d3d12_screen *screen, IUnknown *adapter)
    if (!screen->opts.DoublePrecisionFloatShaderOps)
       screen->nir_options.lower_doubles_options = (nir_lower_doubles_options)~0;
 
+   const char *mesa_version = "Mesa " PACKAGE_VERSION MESA_GIT_SHA1;
+   struct mesa_sha1 sha1_ctx;
+   uint8_t sha1[SHA1_DIGEST_LENGTH];
+   STATIC_ASSERT(PIPE_UUID_SIZE <= sizeof(sha1));
+
+   /* The driver UUID is used for determining sharability of images and memory
+    * between two instances in separate processes.  People who want to
+    * share memory need to also check the device UUID or LUID so all this
+    * needs to be is the build-id.
+    */
+   _mesa_sha1_compute(mesa_version, strlen(mesa_version), sha1);
+   memcpy(screen->driver_uuid, sha1, PIPE_UUID_SIZE);
+
+   /* The device UUID uniquely identifies the given device within the machine. */
+   _mesa_sha1_init(&sha1_ctx);
+   _mesa_sha1_update(&sha1_ctx, &screen->vendor_id, sizeof(screen->vendor_id));
+   _mesa_sha1_update(&sha1_ctx, &screen->device_id, sizeof(screen->device_id));
+   _mesa_sha1_update(&sha1_ctx, &screen->subsys_id, sizeof(screen->subsys_id));
+   _mesa_sha1_update(&sha1_ctx, &screen->revision, sizeof(screen->revision));
+   _mesa_sha1_final(&sha1_ctx, sha1);
+   memcpy(screen->device_uuid, sha1, PIPE_UUID_SIZE);
+
    glsl_type_singleton_init_or_ref();
    return true;
 }

src/gallium/drivers/d3d12/d3d12_screen.h

@@ -60,6 +60,8 @@ struct d3d12_screen {
    struct pipe_screen base;
    struct sw_winsys *winsys;
    LUID adapter_luid;
+   char driver_uuid[PIPE_UUID_SIZE];
+   char device_uuid[PIPE_UUID_SIZE];
 
    ID3D12Device3 *dev;
    ID3D12CommandQueue *cmdqueue;

src/gallium/drivers/d3d12/meson.build

@@ -71,7 +71,7 @@ endif
 
 libd3d12 = static_library(
   'd3d12',
-  files_libd3d12,
+  [files_libd3d12, sha1_h],
   gnu_symbol_visibility : 'hidden',
   include_directories : [inc_include, inc_src, inc_mesa, inc_gallium, inc_gallium_aux],
   dependencies: [idep_nir_headers, idep_libdxil_compiler, dep_dxheaders],