iris: Implement the Xe version of iris_bufmgr_init_global_vm()

As Xe KMD requires VM, iris_bufmgr_init_global_vm() now is returing
a boolean telling if bufmgr creationg should continue or not.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21937>

src/gallium/drivers/iris/iris_bufmgr.c

@@ -67,6 +67,7 @@
 #include "string.h"
 #include "iris_kmd_backend.h"
 #include "i915/iris_bufmgr.h"
+#include "xe/iris_bufmgr.h"
 
 #include "drm-uapi/i915_drm.h"
 
@@ -2209,15 +2210,21 @@ iris_bufmgr_get_meminfo(struct iris_bufmgr *bufmgr,
    return true;
 }
 
-static void
+static bool
 iris_bufmgr_init_global_vm(struct iris_bufmgr *bufmgr)
 {
    switch (bufmgr->devinfo.kmd_type) {
    case INTEL_KMD_TYPE_I915:
       bufmgr->use_global_vm = iris_i915_init_global_vm(bufmgr, &bufmgr->global_vm_id);
-      break;
+      /* i915 don't require VM, so returning true even if use_global_vm is false */
+      return true;
+   case INTEL_KMD_TYPE_XE:
+      bufmgr->use_global_vm = iris_xe_init_global_vm(bufmgr, &bufmgr->global_vm_id);
+      /* Xe requires VM */
+      return bufmgr->use_global_vm;
    default:
       unreachable("missing");
+      return false;
    }
 }
 
@@ -2271,7 +2278,8 @@ iris_bufmgr_create(struct intel_device_info *devinfo, int fd, bool bo_reuse)
                                                             INTEL_ENGINE_CLASS_COMPUTE);
    free(engine_info);
 
-   iris_bufmgr_init_global_vm(bufmgr);
+   if (!iris_bufmgr_init_global_vm(bufmgr))
+      goto error_init_vm;
 
    STATIC_ASSERT(IRIS_MEMZONE_SHADER_START == 0ull);
    const uint64_t _4GB = 1ull << 32;
@@ -2364,6 +2372,7 @@ error_slabs_init:
 
       pb_slabs_deinit(&bufmgr->bo_slabs[i]);
    }
+error_init_vm:
 error_engine_info:
    close(bufmgr->fd);
 error_dup:

src/gallium/drivers/iris/meson.build

@@ -22,6 +22,8 @@ files_libiris = files(
   'i915/iris_bufmgr.c',
   'i915/iris_bufmgr.h',
   'i915/iris_kmd_backend.c',
+  'xe/iris_bufmgr.c',
+  'xe/iris_bufmgr.h',
   'driinfo_iris.h',
   'iris_batch.c',
   'iris_batch.h',

src/gallium/drivers/iris/xe/iris_bufmgr.c

@@ -0,0 +1,41 @@
+/*
+ * 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 "xe/iris_bufmgr.h"
+
+#include "common/intel_gem.h"
+#include "iris/iris_bufmgr.h"
+
+#include "drm-uapi/xe_drm.h"
+
+bool
+iris_xe_init_global_vm(struct iris_bufmgr *bufmgr, uint32_t *vm_id)
+{
+   struct drm_xe_vm_create create = {
+      .flags = DRM_XE_VM_CREATE_SCRATCH_PAGE,
+   };
+   if (intel_ioctl(iris_bufmgr_get_fd(bufmgr), DRM_IOCTL_XE_VM_CREATE, &create))
+      return false;
+
+   *vm_id = create.vm_id;
+   return true;
+}

src/gallium/drivers/iris/xe/iris_bufmgr.h

@@ -0,0 +1,30 @@
+/*
+ * 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
+
+#include <stdint.h>
+#include <stdbool.h>
+
+struct iris_bufmgr;
+
+bool iris_xe_init_global_vm(struct iris_bufmgr *bufmgr, uint32_t *vm_id);