mirror of https://gitee.com/openkylin/linux.git
211 lines
7.2 KiB
C
211 lines
7.2 KiB
C
/* exynos_drm_gem.h
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authoer: Inki Dae <inki.dae@samsung.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _EXYNOS_DRM_GEM_H_
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#define _EXYNOS_DRM_GEM_H_
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#define to_exynos_gem_obj(x) container_of(x,\
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struct exynos_drm_gem_obj, base)
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#define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG)
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/*
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* exynos drm gem buffer structure.
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*
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* @kvaddr: kernel virtual address to allocated memory region.
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* *userptr: user space address.
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* @dma_addr: bus address(accessed by dma) to allocated memory region.
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* - this address could be physical address without IOMMU and
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* device address with IOMMU.
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* @write: whether pages will be written to by the caller.
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* @pages: Array of backing pages.
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* @sgt: sg table to transfer page data.
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* @size: size of allocated memory region.
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* @pfnmap: indicate whether memory region from userptr is mmaped with
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* VM_PFNMAP or not.
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*/
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struct exynos_drm_gem_buf {
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void __iomem *kvaddr;
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unsigned long userptr;
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dma_addr_t dma_addr;
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struct dma_attrs dma_attrs;
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unsigned int write;
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struct page **pages;
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struct sg_table *sgt;
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unsigned long size;
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bool pfnmap;
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};
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/*
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* exynos drm buffer structure.
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*
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* @base: a gem object.
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* - a new handle to this gem object would be created
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* by drm_gem_handle_create().
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* @buffer: a pointer to exynos_drm_gem_buffer object.
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* - contain the information to memory region allocated
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* by user request or at framebuffer creation.
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* continuous memory region allocated by user request
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* or at framebuffer creation.
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* @size: size requested from user, in bytes and this size is aligned
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* in page unit.
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* @vma: a pointer to vm_area.
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* @flags: indicate memory type to allocated buffer and cache attruibute.
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*
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* P.S. this object would be transfered to user as kms_bo.handle so
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* user can access the buffer through kms_bo.handle.
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*/
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struct exynos_drm_gem_obj {
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struct drm_gem_object base;
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struct exynos_drm_gem_buf *buffer;
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unsigned long size;
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struct vm_area_struct *vma;
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unsigned int flags;
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};
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struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
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/* destroy a buffer with gem object */
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void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj);
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/* create a private gem object and initialize it. */
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struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
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unsigned long size);
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/* create a new buffer with gem object */
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struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
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unsigned int flags,
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unsigned long size);
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/*
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* request gem object creation and buffer allocation as the size
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* that it is calculated with framebuffer information such as width,
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* height and bpp.
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*/
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int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/*
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* get dma address from gem handle and this function could be used for
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* other drivers such as 2d/3d acceleration drivers.
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* with this function call, gem object reference count would be increased.
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*/
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dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
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unsigned int gem_handle,
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struct drm_file *filp);
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/*
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* put dma address from gem handle and this function could be used for
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* other drivers such as 2d/3d acceleration drivers.
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* with this function call, gem object reference count would be decreased.
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*/
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void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
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unsigned int gem_handle,
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struct drm_file *filp);
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/* get buffer offset to map to user space. */
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int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/*
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* mmap the physically continuous memory that a gem object contains
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* to user space.
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*/
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int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/* map user space allocated by malloc to pages. */
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int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/* get buffer information to memory region allocated by gem. */
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int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/* initialize gem object. */
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int exynos_drm_gem_init_object(struct drm_gem_object *obj);
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/* free gem object. */
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void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
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/* create memory region for drm framebuffer. */
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int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args);
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/* map memory region for drm framebuffer to user space. */
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int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
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struct drm_device *dev, uint32_t handle,
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uint64_t *offset);
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/*
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* destroy memory region allocated.
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* - a gem handle and physical memory region pointed by a gem object
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* would be released by drm_gem_handle_delete().
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*/
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int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
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struct drm_device *dev,
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unsigned int handle);
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/* page fault handler and mmap fault address(virtual) to physical memory. */
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int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
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/* set vm_flags and we can change the vm attribute to other one at here. */
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int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
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static inline int vma_is_io(struct vm_area_struct *vma)
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{
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return !!(vma->vm_flags & (VM_IO | VM_PFNMAP));
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}
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/* get a copy of a virtual memory region. */
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struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma);
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/* release a userspace virtual memory area. */
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void exynos_gem_put_vma(struct vm_area_struct *vma);
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/* get pages from user space. */
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int exynos_gem_get_pages_from_userptr(unsigned long start,
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unsigned int npages,
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struct page **pages,
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struct vm_area_struct *vma);
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/* drop the reference to pages. */
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void exynos_gem_put_pages_to_userptr(struct page **pages,
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unsigned int npages,
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struct vm_area_struct *vma);
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/* map sgt with dma region. */
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int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev,
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struct sg_table *sgt,
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enum dma_data_direction dir);
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/* unmap sgt from dma region. */
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void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev,
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struct sg_table *sgt,
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enum dma_data_direction dir);
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#endif
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