515.43.04

kernel-open/nvidia-drm/nvidia-drm-gem-user-memory.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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 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.
+ */
+
+#ifndef __NVIDIA_DRM_GEM_USER_MEMORY_H__
+#define __NVIDIA_DRM_GEM_USER_MEMORY_H__
+
+#include "nvidia-drm-conftest.h"
+
+#if defined(NV_DRM_AVAILABLE)
+
+#include "nvidia-drm-gem.h"
+
+struct nv_drm_gem_user_memory {
+    struct nv_drm_gem_object base;
+    struct page **pages;
+    unsigned long pages_count;
+};
+
+extern const struct nv_drm_gem_object_funcs __nv_gem_user_memory_ops;
+
+static inline struct nv_drm_gem_user_memory *to_nv_user_memory(
+    struct nv_drm_gem_object *nv_gem)
+{
+    if (nv_gem != NULL) {
+        return container_of(nv_gem, struct nv_drm_gem_user_memory, base);
+    }
+
+    return NULL;
+}
+
+int nv_drm_gem_import_userspace_memory_ioctl(struct drm_device *dev,
+                                             void *data, struct drm_file *filep);
+
+static inline
+struct nv_drm_gem_user_memory *nv_drm_gem_object_user_memory_lookup(
+    struct drm_device *dev,
+    struct drm_file *filp,
+    u32 handle)
+{
+    struct nv_drm_gem_object *nv_gem =
+            nv_drm_gem_object_lookup(dev, filp, handle);
+
+    if (nv_gem != NULL && nv_gem->ops != &__nv_gem_user_memory_ops) {
+        nv_drm_gem_object_unreference_unlocked(nv_gem);
+        return NULL;
+    }
+
+    return to_nv_user_memory(nv_gem);
+}
+
+#endif
+
+#endif /* __NVIDIA_DRM_GEM_USER_MEMORY_H__ */