75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*/
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#include <linux/dma-buf.h>
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#include <drm/drm_prime.h>
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#include "msm_drv.h"
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#include "msm_gem.h"
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int msm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
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{
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int ret;
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/* Ensure the mmap offset is initialized. We lazily initialize it,
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* so if it has not been first mmap'd directly as a GEM object, the
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* mmap offset will not be already initialized.
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*/
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ret = drm_gem_create_mmap_offset(obj);
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if (ret)
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return ret;
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return drm_gem_prime_mmap(obj, vma);
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}
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struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
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{
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struct msm_gem_object *msm_obj = to_msm_bo(obj);
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int npages = obj->size >> PAGE_SHIFT;
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if (WARN_ON(!msm_obj->pages)) /* should have already pinned! */
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return ERR_PTR(-ENOMEM);
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return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
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}
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int msm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
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{
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void *vaddr;
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vaddr = msm_gem_get_vaddr(obj);
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if (IS_ERR(vaddr))
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return PTR_ERR(vaddr);
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dma_buf_map_set_vaddr(map, vaddr);
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return 0;
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}
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void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map)
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{
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msm_gem_put_vaddr(obj);
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}
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struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach, struct sg_table *sg)
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{
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return msm_gem_import(dev, attach->dmabuf, sg);
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}
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int msm_gem_prime_pin(struct drm_gem_object *obj)
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{
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if (!obj->import_attach)
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msm_gem_get_pages(obj);
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return 0;
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}
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void msm_gem_prime_unpin(struct drm_gem_object *obj)
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{
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if (!obj->import_attach)
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msm_gem_put_pages(obj);
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}
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