Open source GPL/LGPL release

drivers/gpu/nvgpu/os/posix/posix-vidmem.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2019, 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.
+ */
+
+#include <nvgpu/bug.h>
+#include <nvgpu/vidmem.h>
+#include <nvgpu/nvgpu_mem.h>
+#include <nvgpu/nvgpu_sgt.h>
+#include <nvgpu/page_allocator.h>
+#include <nvgpu/posix/posix_vidmem.h>
+
+bool nvgpu_addr_is_vidmem_page_alloc(u64 addr)
+{
+	return ((addr & 1ULL) != 0ULL);
+}
+
+void nvgpu_vidmem_set_page_alloc(struct nvgpu_mem_sgl *sgl, u64 addr)
+{
+	/* set bit 0 to indicate vidmem allocation */
+	sgl->dma = (addr | 1ULL);
+	sgl->phys = (addr | 1ULL);
+}
+
+struct nvgpu_page_alloc *nvgpu_vidmem_get_page_alloc(struct nvgpu_mem_sgl *sgl)
+{
+	u64 addr;
+
+	addr = sgl->dma;
+
+	if (nvgpu_addr_is_vidmem_page_alloc(addr))
+		addr = addr & ~1ULL;
+	else
+		WARN_ON(true);
+
+	return (struct nvgpu_page_alloc *)(uintptr_t)addr;
+}
+
+
+void nvgpu_mem_free_vidmem_alloc(struct gk20a *g, struct nvgpu_mem *vidmem)
+{
+	BUG();
+}