diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.h')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.h | 130 |
1 files changed, 99 insertions, 31 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h index 67cdc916870..1592c0ba7de 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.h +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h @@ -3,24 +3,10 @@ * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Authoer: Inki Dae <inki.dae@samsung.com> * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice (including the next - * paragraph) shall be included in all copies or substantial portions of the - * Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. + * 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_ @@ -29,19 +15,33 @@ #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; }; /* @@ -55,21 +55,35 @@ struct exynos_drm_gem_buf { * 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 + * P.S. this object would be transferred 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 long size); + unsigned int flags, + unsigned long size); /* * request gem object creation and buffer allocation as the size @@ -79,6 +93,24 @@ struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, 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); @@ -90,8 +122,21 @@ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); -/* initialize gem object. */ -int exynos_drm_gem_init_object(struct drm_gem_object *obj); +int exynos_drm_gem_mmap_buffer(struct file *filp, + struct vm_area_struct *vma); + +/* 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); @@ -106,19 +151,42 @@ 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 |