forked from Minki/linux
2c871127e9
the purpose of this patch is to consider IOMMU support in the future. EXYNOS4 SoC supports IOMMU also so the address for DMA could be physical address with IOMMU or device address with IOMMU. Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
124 lines
4.4 KiB
C
124 lines
4.4 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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/*
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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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* @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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* @size: size of allocated memory region.
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*/
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struct exynos_drm_gem_buf {
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void __iomem *kvaddr;
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dma_addr_t dma_addr;
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unsigned long size;
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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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*
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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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};
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/* create a new buffer and get a new gem handle. */
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struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
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struct drm_file *file_priv,
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unsigned int *handle, 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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/* 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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/* unmap a buffer from user space. */
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int exynos_drm_gem_munmap_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, 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, uint64_t *offset);
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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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/*
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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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/* 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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/*
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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, unsigned int handle);
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#endif
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