1 /* 2 * Copyright (c) 2015 MediaTek Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef _MTK_DRM_GEM_H_ 15 #define _MTK_DRM_GEM_H_ 16 17 #include <drm/drm_gem.h> 18 19 /* 20 * mtk drm buffer structure. 21 * 22 * @base: a gem object. 23 * - a new handle to this gem object would be created 24 * by drm_gem_handle_create(). 25 * @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs() 26 * @kvaddr: kernel virtual address of gem buffer. 27 * @dma_addr: dma address of gem buffer. 28 * @dma_attrs: dma attributes of gem buffer. 29 * 30 * P.S. this object would be transferred to user as kms_bo.handle so 31 * user can access the buffer through kms_bo.handle. 32 */ 33 struct mtk_drm_gem_obj { 34 struct drm_gem_object base; 35 void *cookie; 36 void *kvaddr; 37 dma_addr_t dma_addr; 38 unsigned long dma_attrs; 39 struct sg_table *sg; 40 }; 41 42 #define to_mtk_gem_obj(x) container_of(x, struct mtk_drm_gem_obj, base) 43 44 void mtk_drm_gem_free_object(struct drm_gem_object *gem); 45 struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev, size_t size, 46 bool alloc_kmap); 47 int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev, 48 struct drm_mode_create_dumb *args); 49 int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 50 int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj, 51 struct vm_area_struct *vma); 52 struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj); 53 struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, 54 struct dma_buf_attachment *attach, struct sg_table *sg); 55 56 #endif 57