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 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj) 15 { 16 struct msm_gem_object *msm_obj = to_msm_bo(obj); 17 int npages = obj->size >> PAGE_SHIFT; 18 19 if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */ 20 return ERR_PTR(-ENOMEM); 21 22 return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages); 23 } 24 25 int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map) 26 { 27 void *vaddr; 28 29 vaddr = msm_gem_get_vaddr_locked(obj); 30 if (IS_ERR(vaddr)) 31 return PTR_ERR(vaddr); 32 iosys_map_set_vaddr(map, vaddr); 33 34 return 0; 35 } 36 37 void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map) 38 { 39 msm_gem_put_vaddr_locked(obj); 40 } 41 42 struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev, 43 struct dma_buf_attachment *attach, struct sg_table *sg) 44 { 45 return msm_gem_import(dev, attach->dmabuf, sg); 46 } 47 48 int msm_gem_prime_pin(struct drm_gem_object *obj) 49 { 50 struct page **pages; 51 int ret = 0; 52 53 if (obj->import_attach) 54 return 0; 55 56 pages = msm_gem_pin_pages_locked(obj); 57 if (IS_ERR(pages)) 58 ret = PTR_ERR(pages); 59 60 return ret; 61 } 62 63 void msm_gem_prime_unpin(struct drm_gem_object *obj) 64 { 65 if (obj->import_attach) 66 return; 67 68 msm_gem_unpin_pages_locked(obj); 69 } 70