gpu: nvgpu: Move and rename gk20a_sgtable*

Move and rename the functions that build sgtables for nvgpu_mems into
the Linux specific DMA code.

One place outside of the Linux code do include the Linux DMA header.
That will be fixed in a subsequent patch.

JIRA NVGPU-12
JIRA NVGPU-30

Change-Id: Ie43c752b8f998f122af70f7c7eb727af0b0d98df
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1464078
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/linux/dma.h b/drivers/gpu/nvgpu/include/nvgpu/linux/dma.h
new file mode 100644
index 00000000..3960e654
--- /dev/null
+++ b/drivers/gpu/nvgpu/include/nvgpu/linux/dma.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2017, 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_DMA_H__
+#define __NVGPU_LINUX_DMA_H__
+
+/**
+ * Functions used internally for building the backing SGTs for nvgpu_mems.
+ */
+
+int nvgpu_get_sgtable(struct gk20a *g, struct sg_table **sgt,
+                      void *cpuva, u64 iova,
+                      size_t size);
+
+int nvgpu_get_sgtable_from_pages(struct gk20a *g, struct sg_table **sgt,
+                                 struct page **pages, u64 iova,
+                                 size_t size);
+
+void nvgpu_free_sgtable(struct gk20a *g, struct sg_table **sgt);
+
+#endif