drm/xe: NULL binding implementation

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Add uAPI and implementation for NULL bindings. A NULL binding is defined
as writes dropped and read zero. A single bit in the uAPI has been added
which results in a single bit in the PTEs being set.

NULL bindings are intendedd to be used to implement VK sparse bindings,
in particular residencyNonResidentStrict property.

v2: Fix BUG_ON shown in VK testing, fix check patch warning, fix
xe_pt_scan_64K, update __gen8_pte_encode to understand NULL bindings,
remove else if vma_addr

Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Suggested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

...

This commit is contained in:

Matthew Brost 2023-06-15 11:22:36 -07:00 • committed by Rodrigo Vivi

parent ee6ad13705

commit 3743040261

8 changed files with 126 additions and 55 deletions

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1

drivers/gpu/drm/xe/xe_bo.h

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2

drivers/gpu/drm/xe/xe_exec.c

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4

drivers/gpu/drm/xe/xe_gt_pagefault.c

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54

drivers/gpu/drm/xe/xe_pt.c

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99

drivers/gpu/drm/xe/xe_vm.c

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12

drivers/gpu/drm/xe/xe_vm.h

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1

drivers/gpu/drm/xe/xe_vm_types.h

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8

include/uapi/drm/xe_drm.h

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