[PATCH v2 4/4] drm/nvdla/uapi: Add UAPI of NVDLA driver

[Cai Huoqing <cai.huoqing@linux.dev>]

The NVIDIA Deep Learning Accelerator (NVDLA) is an open source IP
which is integrated into NVIDIA Jetson AGX Xavier,
so add UAPI of this driver.

Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev>
---
v1->v2:
*Rename nvdla_drm.[ch] to nvdla_drv.[ch] and rename nvdla_ioctl.h to nvdla_drm.h,
 move it to uapi.
 comments link: https://lore.kernel.org/lkml/20bac605-97e6-e5cd-c4e4-83a8121645d8@amd.com/

 include/uapi/drm/nvdla_drm.h | 99 ++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 include/uapi/drm/nvdla_drm.h

diff --git a/include/uapi/drm/nvdla_drm.h b/include/uapi/drm/nvdla_drm.h
new file mode 100644
index 000000000000..984635285525
--- /dev/null
+++ b/include/uapi/drm/nvdla_drm.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (C) 2017-2018 NVIDIA CORPORATION.
+ * Copyright (C) 2022 Cai Huoqing
+ */
+
+#ifndef __LINUX_NVDLA_IOCTL_H
+#define __LINUX_NVDLA_IOCTL_H
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+#if !defined(__KERNEL__)
+#define __user
+#endif
+
+/**
+ * struct nvdla_mem_handle structure for memory handles
+ *
+ * @handle		handle to DMA buffer allocated in userspace
+ * @reserved		Reserved for padding
+ * @offset		offset in bytes from start address of buffer
+ *
+ */
+struct nvdla_mem_handle {
+	__u32 handle;
+	__u32 reserved;
+	__u64 offset;
+};
+
+/**
+ * struct nvdla_ioctl_submit_task structure for single task information
+ *
+ * @num_addresses		total number of entries in address_list
+ * @reserved			Reserved for padding
+ * @address_list		pointer to array of struct nvdla_mem_handle
+ *
+ */
+struct nvdla_ioctl_submit_task {
+#define NVDLA_MAX_BUFFERS_PER_TASK (6144)
+	__u32 num_addresses;
+#define NVDLA_NO_TIMEOUT    (0xffffffff)
+	__u32 timeout;
+	__u64 address_list;
+};
+
+/**
+ * struct nvdla_submit_args structure for task submit
+ *
+ * @tasks		pointer to array of struct nvdla_ioctl_submit_task
+ * @num_tasks		number of entries in tasks
+ * @flags		flags for task submit, no flags defined yet
+ * @version		version of task structure
+ *
+ */
+struct nvdla_submit_args {
+	__u64 tasks;
+	__u16 num_tasks;
+#define NVDLA_MAX_TASKS_PER_SUBMIT	24
+#define NVDLA_SUBMIT_FLAGS_ATOMIC	(1 << 0)
+	__u16 flags;
+	__u32 version;
+};
+
+/**
+ * struct nvdla_gem_create_args for allocating DMA buffer through GEM
+ *
+ * @handle		handle updated by kernel after allocation
+ * @flags		implementation specific flags
+ * @size		size of buffer to allocate
+ */
+struct nvdla_gem_create_args {
+	__u32 handle;
+	__u32 flags;
+	__u64 size;
+};
+
+/**
+ * struct nvdla_gem_map_offset_args for mapping DMA buffer
+ *
+ * @handle		handle of the buffer
+ * @reserved		reserved for padding
+ * @offset		offset updated by kernel after mapping
+ */
+struct nvdla_gem_map_offset_args {
+	__u32 handle;
+	__u32 reserved;
+	__u64 offset;
+};
+
+#define DRM_NVDLA_SUBMIT		0x00
+#define DRM_NVDLA_GEM_CREATE	0x01
+#define DRM_NVDLA_GEM_MMAP		0x02
+
+#define DRM_IOCTL_NVDLA_SUBMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_NVDLA_SUBMIT, struct nvdla_submit_args)
+#define DRM_IOCTL_NVDLA_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_NVDLA_GEM_CREATE, struct nvdla_gem_create_args)
+#define DRM_IOCTL_NVDLA_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_NVDLA_GEM_MMAP, struct nvdla_gem_map_offset_args)
+
+#endif
-- 
2.25.1