a259cc14ec
We really only need memcpy restore for objects that affect the operability of the migrate context. That is, primarily the page-table objects of the migrate VM. Add an object flag, I915_BO_ALLOC_PM_EARLY for objects that need early restores using memcpy and a way to assign LMEM page-table object flags to be used by the vms. Restore objects without this flag with the gpu blitter and only objects carrying the flag using TTM memcpy. Initially mark the migrate, gt, gtt and vgpu vms to use this flag, and defer for a later audit which vms actually need it. Most importantly, user- allocated vms with pinned page-table objects can be restored using the blitter. Performance-wise memcpy restore is probably as fast as gpu restore if not faster, but using gpu restore will help tackling future restrictions in mappable LMEM size. v4: - Don't mark the aliasing ppgtt page table flags for early resume, but rather the ggtt page table flags as intended. (Matthew Auld) - The check for user buffer objects during early resume is pointless, since they are never marked I915_BO_ALLOC_PM_EARLY. (Matthew Auld) v5: - Mark GuC LMEM objects with I915_BO_ALLOC_PM_EARLY to have them restored before we fire up the migrate context. Cc: Matthew Brost <matthew.brost@intel.com> Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210922062527.865433-8-thomas.hellstrom@linux.intel.com
23 lines
429 B
C
23 lines
429 B
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2020 Intel Corporation
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*/
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#ifndef __GEN8_PPGTT_H__
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#define __GEN8_PPGTT_H__
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#include <linux/kernel.h>
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struct i915_address_space;
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struct intel_gt;
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enum i915_cache_level;
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struct i915_ppgtt *gen8_ppgtt_create(struct intel_gt *gt,
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unsigned long lmem_pt_obj_flags);
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u64 gen8_ggtt_pte_encode(dma_addr_t addr,
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enum i915_cache_level level,
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u32 flags);
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#endif
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