1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #include <linux/dma-buf.h> 8 9 #include <drm/drm_prime.h> 10 11 #include "msm_drv.h" 12 #include "msm_gem.h" 13 14 int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) 15 { 16 int ret; 17 18 /* Ensure the mmap offset is initialized. We lazily initialize it, 19 * so if it has not been first mmap'd directly as a GEM object, the 20 * mmap offset will not be already initialized. 21 */ 22 ret = drm_gem_create_mmap_offset(obj); 23 if (ret) 24 return ret; 25 26 return drm_gem_prime_mmap(obj, vma); 27 } 28 29 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj) 30 { 31 struct msm_gem_object *msm_obj = to_msm_bo(obj); 32 int npages = obj->size >> PAGE_SHIFT; 33 34 if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */ 35 return ERR_PTR(-ENOMEM); 36 37 return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages); 38 } 39 40 int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map) 41 { 42 void *vaddr; 43 44 vaddr = msm_gem_get_vaddr(obj); 45 if (IS_ERR(vaddr)) 46 return PTR_ERR(vaddr); 47 iosys_map_set_vaddr(map, vaddr); 48 49 return 0; 50 } 51 52 void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map) 53 { 54 msm_gem_put_vaddr(obj); 55 } 56 57 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev, 58 struct dma_buf_attachment *attach, struct sg_table *sg) 59 { 60 return msm_gem_import(dev, attach->dmabuf, sg); 61 } 62 63 int msm_gem_prime_pin(struct drm_gem_object *obj) 64 { 65 if (!obj->import_attach) 66 msm_gem_pin_pages(obj); 67 return 0; 68 } 69 70 void msm_gem_prime_unpin(struct drm_gem_object *obj) 71 { 72 if (!obj->import_attach) 73 msm_gem_unpin_pages(obj); 74 } 75