cf3e3e86d7
Use the ttm handlers for servicing page faults, and vm_access. We do our own validation of read-only access, otherwise use the ttm handlers as much as possible. Because the ttm handlers expect the vma_node at vma->base, we slightly need to massage the mmap handlers to look at vma_node->driver_private to fetch the bo, if it's NULL, we assume i915's normal mmap_offset uapi is used. This is the easiest way to achieve compatibility without changing ttm's semantics. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210610070152.572423-5-thomas.hellstrom@linux.intel.com
22 lines
397 B
C
22 lines
397 B
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef IGT_MMAP_H
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#define IGT_MMAP_H
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#include <linux/types.h>
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struct drm_i915_private;
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struct drm_vma_offset_node;
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unsigned long igt_mmap_offset(struct drm_i915_private *i915,
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u64 offset,
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unsigned long size,
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unsigned long prot,
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unsigned long flags);
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#endif /* IGT_MMAP_H */
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