anv: implement VK_EXT_physical_device_drm

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/vulkan/anv_device.c

@@ -24,7 +24,9 @@
 #include <assert.h>
 #include <stdbool.h>
 #include <string.h>
+#include <sys/sysmacros.h>
 #include <sys/mman.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include "drm-uapi/drm_fourcc.h"
@@ -550,6 +552,24 @@ anv_physical_device_try_create(struct anv_instance *instance,
    }
    device->master_fd = master_fd;
 
+   struct stat st;
+   if (stat(path, &st) != 0) {
+      result = vk_errorfi(instance, NULL, VK_ERROR_INITIALIZATION_FAILED,
+                          "failed to stat DRM node %s", path);
+      goto fail_disk_cache;
+   }
+   device->local_node[0] = (int64_t) major(st.st_rdev);
+   device->local_node[1] = (int64_t) minor(st.st_rdev);
+   if (master_fd != -1) {
+      if (stat(primary_path, &st) != 0) {
+         result = vk_errorfi(instance, NULL, VK_ERROR_INITIALIZATION_FAILED,
+                             "failed to stat DRM node %s", primary_path);
+         goto fail_disk_cache;
+      }
+      device->master_node[0] = (int64_t) major(st.st_rdev);
+      device->master_node[1] = (int64_t) minor(st.st_rdev);
+   }
+
    result = anv_init_wsi(device);
    if (result != VK_SUCCESS)
       goto fail_disk_cache;
@@ -1899,6 +1919,22 @@ void anv_GetPhysicalDeviceProperties2(
          break;
       }
 
+      case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DRM_PROPERTIES_EXT: {
+         VkPhysicalDeviceDrmPropertiesEXT *props =
+            (VkPhysicalDeviceDrmPropertiesEXT *)ext;
+         if (pdevice->master_fd != -1) {
+            props->hasPrimary = true;
+            props->primaryMajor = pdevice->master_node[0];
+            props->primaryMinor = pdevice->master_node[1];
+         } else {
+            props->hasPrimary = false;
+         }
+         props->hasRender = true;
+         props->renderMajor = pdevice->local_node[0];
+         props->renderMinor = pdevice->local_node[1];
+         break;
+      }
+
       case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_MEMORY_HOST_PROPERTIES_EXT: {
          VkPhysicalDeviceExternalMemoryHostPropertiesEXT *props =
             (VkPhysicalDeviceExternalMemoryHostPropertiesEXT *) ext;

src/intel/vulkan/anv_extensions.py

@@ -148,6 +148,7 @@ EXTENSIONS = [
     Extension('VK_EXT_line_rasterization',                1, True),
     Extension('VK_EXT_memory_budget',                     1, 'device->has_mem_available'),
     Extension('VK_EXT_pci_bus_info',                      2, True),
+    Extension('VK_EXT_physical_device_drm',               1, True),
     Extension('VK_EXT_pipeline_creation_cache_control',   3, True),
     Extension('VK_EXT_pipeline_creation_feedback',        1, True),
     Extension('VK_EXT_post_depth_coverage',               1, 'device->info.gen >= 9'),

src/intel/vulkan/anv_private.h

@@ -30,6 +30,7 @@
 #include <pthread.h>
 #include <assert.h>
 #include <stdint.h>
+
 #include "drm-uapi/i915_drm.h"
 
 #ifdef HAVE_VALGRIND
@@ -1145,6 +1146,12 @@ struct anv_physical_device {
     struct wsi_device                       wsi_device;
     int                                         local_fd;
     int                                         master_fd;
+
+    /**
+     * Major & minor DRM numbers.
+     */
+    int64_t                                     local_node[2];
+    int64_t                                     master_node[2];
 };
 
 struct anv_app_info {