intel/dev: Detect what is the kernel mode driver loaded

Intel GPUs will have a new kernel mode driver, support for some
platforms will overlap so we will need to detect in runtime what is
the kernel mode driver loaded for each device.

Reviewed-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20773>

src/intel/dev/intel_device_info.c

@@ -1518,6 +1518,12 @@ intel_get_device_info_from_fd(int fd, struct intel_device_info *devinfo)
       return false;
    }
 
+   devinfo->kmd_type = intel_get_kmd_type(fd);
+   if (devinfo->kmd_type == INTEL_KMD_TYPE_INVALID) {
+      mesa_loge("Unknown kernel mode driver");
+      return false;
+   }
+
    /* remaining initializion queries the kernel for device info */
    if (devinfo->no_hw) {
       /* Provide some sensible values for NO_HW. */

src/intel/dev/intel_device_info.h

@@ -30,6 +30,7 @@
 
 #include "util/macros.h"
 #include "compiler/shader_enums.h"
+#include "intel_kmd.h"
 
 #include "intel/common/intel_engine.h"
 
@@ -96,6 +97,8 @@ enum intel_platform {
  */
 struct intel_device_info
 {
+   enum intel_kmd_type kmd_type;
+
    /* Driver internal numbers used to differentiate platforms. */
    int ver;
    int verx10;

src/intel/dev/intel_kmd.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright © 2023 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <xf86drm.h>
+
+#include "intel_kmd.h"
+
+enum intel_kmd_type
+intel_get_kmd_type(int fd)
+{
+   enum intel_kmd_type type = INTEL_KMD_TYPE_INVALID;
+   drmVersionPtr version = drmGetVersion(fd);
+
+   if (!version)
+      return type;
+
+   if (strcmp(version->name, "i915") == 0)
+      type = INTEL_KMD_TYPE_I915;
+
+   drmFreeVersion(version);
+   return type;
+}

src/intel/dev/intel_kmd.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright © 2023 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#pragma once
+
+enum intel_kmd_type {
+   INTEL_KMD_TYPE_INVALID = 0,
+   INTEL_KMD_TYPE_I915,
+   INTEL_KMD_TYPE_LAST
+};
+
+enum intel_kmd_type intel_get_kmd_type(int fd);

src/intel/dev/meson.build

@@ -29,6 +29,8 @@ files_libintel_dev = files(
   'intel_device_info.h',
   'intel_hwconfig.c',
   'intel_hwconfig.h',
+  'intel_kmd.c',
+  'intel_kmd.h',
 )
 
 libintel_dev = static_library(