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255fc1703e
To enable partial memory mapping of GPU virtual memory, it's necessary to introduce an offset to the object's memory (obj->mm.pages) scatterlist. This adjustment compensates for instances when userspace mappings do not start from the beginning of the object. Based on a patch by Chris Wilson. Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com> Cc: Chris Wilson <chris.p.wilson@linux.intel.com> Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reviewed-by: Nirmoy Das <nirmoy.das@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240807100521.478266-3-andi.shyti@linux.intel.com
36 lines
856 B
C
36 lines
856 B
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2021 Intel Corporation
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*/
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#ifndef __I915_MM_H__
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#define __I915_MM_H__
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#include <linux/bug.h>
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#include <linux/types.h>
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struct vm_area_struct;
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struct io_mapping;
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struct scatterlist;
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#if IS_ENABLED(CONFIG_X86)
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int remap_io_mapping(struct vm_area_struct *vma,
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unsigned long addr, unsigned long pfn, unsigned long size,
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struct io_mapping *iomap);
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#else
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static inline
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int remap_io_mapping(struct vm_area_struct *vma,
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unsigned long addr, unsigned long pfn, unsigned long size,
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struct io_mapping *iomap)
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{
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WARN_ONCE(1, "Architecture has no drm_cache.c support\n");
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return 0;
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}
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#endif
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int remap_io_sg(struct vm_area_struct *vma,
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unsigned long addr, unsigned long size,
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struct scatterlist *sgl, unsigned long offset,
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resource_size_t iobase);
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#endif /* __I915_MM_H__ */
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