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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2013 Red Hat4 * 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 14struct 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 25int 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 37void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)38{39 msm_gem_put_vaddr_locked(obj);40}41 42struct 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 48int 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 63void 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