/* exynos_drm_gem.h * * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Authoer: Inki Dae * * 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); /* 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); /* 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