gpu: ion: tegra: add tegra custom ioctl handling.

Add tegra specific custom ioctl handling.

Change-Id: If87b47f969fe0b3fdbb3bee965c370f6610fd4be
Signed-off-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-on: http://git-master/r/71113
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Hiroshi Doyu <hdoyu@nvidia.com>
Tested-by: Hiroshi Doyu <hdoyu@nvidia.com>

1 files changed, 98 insertions, 0 deletions

diff --git a/include/linux/tegra_ion.h b/include/linux/tegra_ion.h
new file mode 100644
index 000000000000..43d3d5a1cfdc
--- /dev/null
+++ b/include/linux/tegra_ion.h
@@ -0,0 +1,98 @@
+/*
+ * include/linux/tegra_ion.h
+ *
+ * Copyright (C) 2011, NVIDIA Corporation.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/ion.h>
+
+#if !defined(__KERNEL__)
+#define __user
+#endif
+
+#ifndef _LINUX_TEGRA_ION_H
+#define _LINUX_TEGRA_ION_H
+
+struct tegra_ion_id_data {
+	struct ion_handle *handle;
+	unsigned long id;
+	size_t size;
+};
+
+struct tegra_ion_pin_data {
+	struct ion_handle **handles; /* array of handles to pin/unpin */
+	unsigned long *addr; /* array pf addresses to return */
+	unsigned long count; /* number of entries in handles */
+};
+
+/* Cache operations. */
+enum {
+	TEGRA_ION_CACHE_OP_WB = 0,
+	TEGRA_ION_CACHE_OP_INV,
+	TEGRA_ION_CACHE_OP_WB_INV,
+};
+
+struct tegra_ion_cache_maint_data {
+	unsigned long addr;
+	struct ion_handle *handle;
+	size_t len;
+	unsigned int op;
+};
+
+struct tegra_ion_rw_data {
+	unsigned long addr; /* user pointer*/
+	struct ion_handle *handle;
+	unsigned int offset; /* offset into handle mem */
+	unsigned int elem_size; /* individual atome size */
+	unsigned int mem_stride; /*delta in bytes between atoms in handle mem*/
+	unsigned int user_stride; /* delta in bytes between atoms in user */
+	unsigned int count; /* number of atoms to copy */
+};
+
+struct tegra_ion_get_params_data {
+	struct ion_handle *handle;
+	size_t size;
+	unsigned int align;
+	unsigned int heap;
+	unsigned long addr;
+};
+
+/* Custom Ioctl's. */
+enum {
+	TEGRA_ION_ALLOC_FROM_ID = 0,
+	TEGRA_ION_GET_ID,
+	TEGRA_ION_PIN,
+	TEGRA_ION_UNPIN,
+	TEGRA_ION_CACHE_MAINT,
+	TEGRA_ION_READ,
+	TEGRA_ION_WRITE,
+	TEGRA_ION_GET_PARAM,
+};
+
+/* List of heaps in the system. */
+enum {
+	TEGRA_ION_HEAP_CARVEOUT = 0,
+	TEGRA_ION_HEAP_IRAM,
+	TEGRA_ION_HEAP_VPR,
+	TEGRA_ION_HEAP_IOMMU
+};
+
+/* additional heap types used only on tegra */
+enum {
+	TEGRA_ION_HEAP_TYPE_IOMMU = ION_HEAP_TYPE_CUSTOM + 1,
+};
+
+#define TEGRA_ION_HEAP_IOMMU_MASK (1 << TEGRA_ION_HEAP_TYPE_IOMMU)
+
+#endif /* _LINUX_TEGRA_ION_H */