cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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exynos_drm_gem.h (3532B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/* exynos_drm_gem.h
      3 *
      4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
      5 * Authoer: Inki Dae <inki.dae@samsung.com>
      6 */
      7
      8#ifndef _EXYNOS_DRM_GEM_H_
      9#define _EXYNOS_DRM_GEM_H_
     10
     11#include <drm/drm_gem.h>
     12#include <linux/mm_types.h>
     13
     14#define to_exynos_gem(x)	container_of(x, struct exynos_drm_gem, base)
     15
     16#define IS_NONCONTIG_BUFFER(f)		(f & EXYNOS_BO_NONCONTIG)
     17
     18/*
     19 * exynos drm buffer structure.
     20 *
     21 * @base: a gem object.
     22 *	- a new handle to this gem object would be created
     23 *	by drm_gem_handle_create().
     24 * @flags: indicate memory type to allocated buffer and cache attruibute.
     25 * @size: size requested from user, in bytes and this size is aligned
     26 *	in page unit.
     27 * @cookie: cookie returned by dma_alloc_attrs
     28 * @kvaddr: kernel virtual address to allocated memory region (for fbdev)
     29 * @dma_addr: bus address(accessed by dma) to allocated memory region.
     30 *	- this address could be physical address without IOMMU and
     31 *	device address with IOMMU.
     32 * @dma_attrs: attrs passed dma mapping framework
     33 * @sgt: Imported sg_table.
     34 *
     35 * P.S. this object would be transferred to user as kms_bo.handle so
     36 *	user can access the buffer through kms_bo.handle.
     37 */
     38struct exynos_drm_gem {
     39	struct drm_gem_object	base;
     40	unsigned int		flags;
     41	unsigned long		size;
     42	void			*cookie;
     43	void			*kvaddr;
     44	dma_addr_t		dma_addr;
     45	unsigned long		dma_attrs;
     46	struct sg_table		*sgt;
     47};
     48
     49/* destroy a buffer with gem object */
     50void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem);
     51
     52/* create a new buffer with gem object */
     53struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev,
     54					     unsigned int flags,
     55					     unsigned long size,
     56					     bool kvmap);
     57
     58/*
     59 * request gem object creation and buffer allocation as the size
     60 * that it is calculated with framebuffer information such as width,
     61 * height and bpp.
     62 */
     63int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
     64				struct drm_file *file_priv);
     65
     66/* get fake-offset of gem object that can be used with mmap. */
     67int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data,
     68			     struct drm_file *file_priv);
     69
     70/*
     71 * get exynos drm object from gem handle, this function could be used for
     72 * other drivers such as 2d/3d acceleration drivers.
     73 * with this function call, gem object reference count would be increased.
     74 */
     75struct exynos_drm_gem *exynos_drm_gem_get(struct drm_file *filp,
     76					  unsigned int gem_handle);
     77
     78/*
     79 * put exynos drm object acquired from exynos_drm_gem_get(),
     80 * gem object reference count would be decreased.
     81 */
     82static inline void exynos_drm_gem_put(struct exynos_drm_gem *exynos_gem)
     83{
     84	drm_gem_object_put(&exynos_gem->base);
     85}
     86
     87/* get buffer information to memory region allocated by gem. */
     88int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
     89				      struct drm_file *file_priv);
     90
     91/* free gem object. */
     92void exynos_drm_gem_free_object(struct drm_gem_object *obj);
     93
     94/* create memory region for drm framebuffer. */
     95int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
     96			       struct drm_device *dev,
     97			       struct drm_mode_create_dumb *args);
     98
     99/* low-level interface prime helpers */
    100struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev,
    101					    struct dma_buf *dma_buf);
    102struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj);
    103struct drm_gem_object *
    104exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
    105				     struct dma_buf_attachment *attach,
    106				     struct sg_table *sgt);
    107
    108#endif