drm_prime.c (6bde8ef51c917a657476310728d6cb3de6bac9e4) drm_prime.c (707d561f77b5e2a6f90c9786bee44ee7a8dedc7e)
1/*
2 * Copyright © 2012 Red Hat
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the

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797 * @nr_pages: length of the page vector
798 *
799 * This helper creates an sg table object from a set of pages
800 * the driver is responsible for mapping the pages into the
801 * importers address space for use with dma_buf itself.
802 *
803 * This is useful for implementing &drm_gem_object_funcs.get_sg_table.
804 */
1/*
2 * Copyright © 2012 Red Hat
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the

--- 788 unchanged lines hidden (view full) ---

797 * @nr_pages: length of the page vector
798 *
799 * This helper creates an sg table object from a set of pages
800 * the driver is responsible for mapping the pages into the
801 * importers address space for use with dma_buf itself.
802 *
803 * This is useful for implementing &drm_gem_object_funcs.get_sg_table.
804 */
805struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages)
805struct sg_table *drm_prime_pages_to_sg(struct drm_device *dev,
806 struct page **pages, unsigned int nr_pages)
806{
807 struct sg_table *sg = NULL;
807{
808 struct sg_table *sg = NULL;
809 size_t max_segment = 0;
808 int ret;
809
810 sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
811 if (!sg) {
812 ret = -ENOMEM;
813 goto out;
814 }
815
810 int ret;
811
812 sg = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
813 if (!sg) {
814 ret = -ENOMEM;
815 goto out;
816 }
817
816 ret = sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
817 nr_pages << PAGE_SHIFT, GFP_KERNEL);
818 if (dev)
819 max_segment = dma_max_mapping_size(dev->dev);
820 if (max_segment == 0 || max_segment > SCATTERLIST_MAX_SEGMENT)
821 max_segment = SCATTERLIST_MAX_SEGMENT;
822 ret = __sg_alloc_table_from_pages(sg, pages, nr_pages, 0,
823 nr_pages << PAGE_SHIFT,
824 max_segment, GFP_KERNEL);
818 if (ret)
819 goto out;
820
821 return sg;
822out:
823 kfree(sg);
824 return ERR_PTR(ret);
825}

--- 201 unchanged lines hidden --- 		825 if (ret)
826 goto out;
827
828 return sg;
829out:
830 kfree(sg);
831 return ERR_PTR(ret);
832}

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