1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/ltc.c b/drivers/gpu/nvgpu/os/linux/ltc.c
new file mode 100644
index 00000000..1a58bc4e
--- /dev/null
+++ b/drivers/gpu/nvgpu/os/linux/ltc.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018, 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/ltc.h>
+#include <nvgpu/dma.h>
+#include <nvgpu/nvgpu_mem.h>
+
+#include "gk20a/gk20a.h"
+#include "gk20a/gr_gk20a.h"
+
+int nvgpu_ltc_alloc_cbc(struct gk20a *g, size_t compbit_backing_size)
+{
+        struct gr_gk20a *gr = &g->gr;
+        unsigned long flags = 0;
+
+        if (nvgpu_mem_is_valid(&gr->compbit_store.mem))
+                return 0;
+
+        if (!nvgpu_iommuable(g))
+                flags = NVGPU_DMA_FORCE_CONTIGUOUS;
+
+        return nvgpu_dma_alloc_flags_sys(g,
+                                         flags,
+                                         compbit_backing_size,
+                                         &gr->compbit_store.mem);
+}