1 files changed, 78 insertions, 0 deletions

diff --git a/include/os/linux/dmabuf_vidmem.h b/include/os/linux/dmabuf_vidmem.h
new file mode 100644
index 0000000..977fd78
--- /dev/null
+++ b/include/os/linux/dmabuf_vidmem.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2017-2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __NVGPU_LINUX_DMABUF_VIDMEM_H__
+#define __NVGPU_LINUX_DMABUF_VIDMEM_H__
+
+#include <nvgpu/types.h>
+
+struct dma_buf;
+
+struct gk20a;
+struct scatterlist;
+
+#ifdef CONFIG_GK20A_VIDMEM
+
+struct gk20a *nvgpu_vidmem_buf_owner(struct dma_buf *dmabuf);
+int nvgpu_vidmem_export_linux(struct gk20a *g, size_t bytes);
+
+void nvgpu_vidmem_set_page_alloc(struct scatterlist *sgl, u64 addr);
+struct nvgpu_page_alloc *nvgpu_vidmem_get_page_alloc(struct scatterlist *sgl);
+
+int nvgpu_vidmem_buf_access_memory(struct gk20a *g, struct dma_buf *dmabuf,
+                void *buffer, u64 offset, u64 size, u32 cmd);
+
+#else /* !CONFIG_GK20A_VIDMEM */
+
+static inline struct gk20a *nvgpu_vidmem_buf_owner(struct dma_buf *dmabuf)
+{
+        return NULL;
+}
+
+static inline int nvgpu_vidmem_export_linux(struct gk20a *g, size_t bytes)
+{
+        return -ENOSYS;
+}
+
+static inline void nvgpu_vidmem_set_page_alloc(struct scatterlist *sgl,
+                                               u64 addr)
+{
+}
+
+static inline struct nvgpu_page_alloc *nvgpu_vidmem_get_page_alloc(
+        struct scatterlist *sgl)
+{
+        return NULL;
+}
+
+static inline int nvgpu_vidmem_buf_access_memory(struct gk20a *g,
+                                                 struct dma_buf *dmabuf,
+                                                 void *buffer, u64 offset,
+                                                 u64 size, u32 cmd)
+{
+        return -ENOSYS;
+}
+
+#endif
+
+
+struct nvgpu_vidmem_linux {
+        struct dma_buf  *dmabuf;
+        void            *dmabuf_priv;
+        void            (*dmabuf_priv_delete)(void *);
+};
+
+#endif