On Fri, Sep 19, 2014 at 1:47 AM, Mark yao <mark.yao@xxxxxxxxxxxxxx> wrote:
> diff --git a/include/uapi/drm/rockchip_drm.h b/include/uapi/drm/rockchip_drm.h
> new file mode 100644
> index 0000000..8f8e60e
> --- /dev/null
> +++ b/include/uapi/drm/rockchip_drm.h
> @@ -0,0 +1,97 @@
> +/*
> + *
> + * Copyright (c) Fuzhou Rockchip Electronics Co.Ltd
> + * Authors:
> + * Mark Yao <yzq@xxxxxxxxxxxxxx>
> + *
> + * base on exynos_drm.h
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or (at your
> + * option) any later version.
> + */
> +
> +#ifndef _UAPI_ROCKCHIP_DRM_H
> +#define _UAPI_ROCKCHIP_DRM_H
> +
> +#include <drm/drm.h>
> +
> +/**
> + * User-desired buffer creation information structure.
> + *
> + * @size: user-desired memory allocation size.
> + * @flags: user request for setting memory type or cache attributes.
> + * @handle: returned a handle to created gem object.
> + * - this handle will be set by gem module of kernel side.
> + */
> +struct drm_rockchip_gem_create {
> + uint64_t size;
> + uint32_t flags;
> + uint32_t handle;
> +};
> +
> +/**
> + * A structure for getting buffer offset.
> + *
> + * @handle: a pointer to gem object created.
> + * @pad: just padding to be 64-bit aligned.
> + * @offset: relatived offset value of the memory region allocated.
> + * - this value should be set by user.
> + */
> +struct drm_rockchip_gem_map_off {
> + uint32_t handle;
> + uint32_t pad;
> + uint64_t offset;
> +};
> +
> +/**
> + * A structure for mapping buffer.
> + *
> + * @handle: a handle to gem object created.
> + * @pad: just padding to be 64-bit aligned.
> + * @size: memory size to be mapped.
> + * @mapped: having user virtual address mmaped.
> + * - this variable would be filled by rockchip gem module
> + * of kernel side with user virtual address which is allocated
> + * by do_mmap().
> + */
> +struct drm_rockchip_gem_mmap {
> + uint32_t handle;
> + uint32_t pad;
> + uint64_t size;
> + uint64_t mapped;
> +};
Could we do without the mmap ioctl? It has been a source of problems
in other drivers, and the ioctl to get mmap offset, plus normal mmap()
on drm device file should be sufficient
BR,
-R
> +/**
> + * A structure to gem information.
> + *
> + * @handle: a handle to gem object created.
> + * @flags: flag value including memory type and cache attribute and
> + * this value would be set by driver.
> + * @size: size to memory region allocated by gem and this size would
> + * be set by driver.
> + */
> +struct drm_rockchip_gem_info {
> + uint32_t handle;
> + uint32_t flags;
> + uint64_t size;
> +};
> +
> +#define DRM_ROCKCHIP_GEM_CREATE 0x00
> +#define DRM_ROCKCHIP_GEM_MAP_OFFSET 0x01
> +#define DRM_ROCKCHIP_GEM_MMAP 0x02
> +#define DRM_ROCKCHIP_GEM_GET 0x04
> +
> +#define DRM_IOCTL_ROCKCHIP_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + \
> + DRM_ROCKCHIP_GEM_CREATE, struct drm_rockchip_gem_create)
> +
> +#define DRM_IOCTL_ROCKCHIP_GEM_MAP_OFFSET DRM_IOWR(DRM_COMMAND_BASE + \
> + DRM_ROCKCHIP_GEM_MAP_OFFSET, struct drm_rockchip_gem_map_off)
> +
> +#define DRM_IOCTL_ROCKCHIP_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + \
> + DRM_ROCKCHIP_GEM_MMAP, struct drm_rockchip_gem_mmap)
> +
> +#define DRM_IOCTL_ROCKCHIP_GEM_GET DRM_IOWR(DRM_COMMAND_BASE + \
> + DRM_ROCKCHIP_GEM_GET, struct drm_rockchip_gem_info)
> +#endif /* _UAPI_ROCKCHIP_DRM_H */
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