diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.h')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h new file mode 100644 index 0000000..468766b --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h @@ -0,0 +1,201 @@ +/* exynos_drm_gem.h + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * Authoer: Inki Dae <inki.dae@samsung.com> + * + * 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 _EXYNOS_DRM_GEM_H_ +#define _EXYNOS_DRM_GEM_H_ + +#define to_exynos_gem_obj(x) container_of(x,\ + struct exynos_drm_gem_obj, base) + +#define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG) + +/* + * exynos drm gem buffer structure. + * + * @kvaddr: kernel virtual address to allocated memory region. + * *userptr: user space address. + * @dma_addr: bus address(accessed by dma) to allocated memory region. + * - this address could be physical address without IOMMU and + * device address with IOMMU. + * @write: whether pages will be written to by the caller. + * @pages: Array of backing pages. + * @sgt: sg table to transfer page data. + * @size: size of allocated memory region. + * @pfnmap: indicate whether memory region from userptr is mmaped with + * VM_PFNMAP or not. + */ +struct exynos_drm_gem_buf { + void __iomem *kvaddr; + unsigned long userptr; + dma_addr_t dma_addr; + struct dma_attrs dma_attrs; + unsigned int write; + struct page **pages; + struct sg_table *sgt; + unsigned long size; + bool pfnmap; +}; + +/* + * exynos drm buffer structure. + * + * @base: a gem object. + * - a new handle to this gem object would be created + * by drm_gem_handle_create(). + * @buffer: a pointer to exynos_drm_gem_buffer object. + * - contain the information to memory region allocated + * by user request or at framebuffer creation. + * continuous memory region allocated by user request + * or at framebuffer creation. + * @size: size requested from user, in bytes and this size is aligned + * in page unit. + * @vma: a pointer to vm_area. + * @flags: indicate memory type to allocated buffer and cache attruibute. + * + * P.S. this object would be transfered to user as kms_bo.handle so + * user can access the buffer through kms_bo.handle. + */ +struct exynos_drm_gem_obj { + struct drm_gem_object base; + struct exynos_drm_gem_buf *buffer; + unsigned long size; + struct vm_area_struct *vma; + unsigned int flags; +}; + +struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask); + +/* destroy a buffer with gem object */ +void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj); + +/* create a private gem object and initialize it. */ +struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev, + unsigned long size); + +/* create a new buffer with gem object */ +struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, + unsigned int flags, + unsigned long size); + +/* + * request gem object creation and buffer allocation as the size + * that it is calculated with framebuffer information such as width, + * height and bpp. + */ +int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* + * get dma address from gem handle and this function could be used for + * other drivers such as 2d/3d acceleration drivers. + * with this function call, gem object reference count would be increased. + */ +dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, + unsigned int gem_handle, + struct drm_file *filp); + +/* + * put dma address from gem handle and this function could be used for + * other drivers such as 2d/3d acceleration drivers. + * with this function call, gem object reference count would be decreased. + */ +void exynos_drm_gem_put_dma_addr(struct drm_device *dev, + unsigned int gem_handle, + struct drm_file *filp); + +/* get buffer offset to map to user space. */ +int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* + * mmap the physically continuous memory that a gem object contains + * to user space. + */ +int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* map user space allocated by malloc to pages. */ +int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* get buffer information to memory region allocated by gem. */ +int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* get buffer size to gem handle. */ +unsigned long exynos_drm_gem_get_size(struct drm_device *dev, + unsigned int gem_handle, + struct drm_file *file_priv); + +/* initialize gem object. */ +int exynos_drm_gem_init_object(struct drm_gem_object *obj); + +/* free gem object. */ +void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj); + +/* create memory region for drm framebuffer. */ +int exynos_drm_gem_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args); + +/* map memory region for drm framebuffer to user space. */ +int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, + struct drm_device *dev, uint32_t handle, + uint64_t *offset); + +/* + * destroy memory region allocated. + * - a gem handle and physical memory region pointed by a gem object + * would be released by drm_gem_handle_delete(). + */ +int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, + struct drm_device *dev, + unsigned int handle); + +/* page fault handler and mmap fault address(virtual) to physical memory. */ +int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); + +/* set vm_flags and we can change the vm attribute to other one at here. */ +int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); + +static inline int vma_is_io(struct vm_area_struct *vma) +{ + return !!(vma->vm_flags & (VM_IO | VM_PFNMAP)); +} + +/* get a copy of a virtual memory region. */ +struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma); + +/* release a userspace virtual memory area. */ +void exynos_gem_put_vma(struct vm_area_struct *vma); + +/* get pages from user space. */ +int exynos_gem_get_pages_from_userptr(unsigned long start, + unsigned int npages, + struct page **pages, + struct vm_area_struct *vma); + +/* drop the reference to pages. */ +void exynos_gem_put_pages_to_userptr(struct page **pages, + unsigned int npages, + struct vm_area_struct *vma); + +/* map sgt with dma region. */ +int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, + struct sg_table *sgt, + enum dma_data_direction dir); + +/* unmap sgt from dma region. */ +void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, + struct sg_table *sgt, + enum dma_data_direction dir); + +#endif |