[PATCH v2 00/32] PREFETCH and MADVISE for SVM ranges

[Himal Prasad Ghimiray]

Region 0: Ranges remain in SMEM with only PTE updates.
Region 1: Ranges migrate to VRAM with corresponding PTE updates.
Madvise Ioctl:

Provides a user API to assign attributes like pat_index, atomic
operation type, and preferred location for SVM ranges.
The Kernel Mode Driver (KMD) may split existing VMAs to cover input
ranges, assign user-provided attributes, and invalidate existing PTEs so
that the next page fault/prefetch can use the new attributes.

v2
- Address comments from Matt B
- Add atomic handling
- Rebase 


Himal Prasad Ghimiray (32):
  drm/xe: Introduce xe_vma_op_prefetch_range struct for prefetch of
    ranges
  drm/xe: Make xe_svm_alloc_vram public
  drm/xe/svm: Helper to add tile masks to svm ranges
  drm/xe/svm: Make to_xe_range a public function
  drm/xe/svm: Make xe_svm_range_* end/start/size public
  drm/xe/vm: Update xe_vma_ops_incr_pt_update_ops to take an increment
    value
  drm/xe/vm: Add an identifier in xe_vma_ops for svm prefetch
  drm/xe: Rename lookup_vma function to xe_find_vma_by_addr
  drm/xe/svm: Allow unaligned addresses and ranges for prefetch
  drm/xe/svm: Refactor usage of drm_gpusvm* function in xe_svm
  drm/xe/svm: Add function to determine if range needs VRAM migration
  drm/gpusvm: Introduce vram_only flag for VRAM allocation
  drm/xe/svm: Incase of atomic access ensure get_pages happens from vram
  drm/xe/svm: Implement prefetch support for SVM ranges
  drm/xe/vm: Add debug prints for SVM range prefetch
  Introduce drm_gpuvm_sm_map_ops_flags enums for sm_map_ops
  drm/xe/uapi: Add madvise interface
  drm/xe/vm: Add attributes struct as member of vma
  drm/xe/vma: Move pat_index to vma attributes
  drm/xe/vma: Modify new_vma to accept struct xe_vma_mem_attr as
    parameter
  drm/gpusvm: Make drm_gpusvm_for_each_* macros public
  drm/xe/svm: Split system allocator vma incase of madvise call
  drm/xe: Implement madvise ioctl for xe
  drm/xe: Allow CPU address mirror VMA unbind with gpu bindings for
    madvise
  drm/xe/svm : Add svm ranges migration policy on atomic access
  drm/xe/madvise: Update migration policy based on preferred location
  drm/xe/svm: Support DRM_XE_SVM_ATTR_PAT memory attribute
  drm/xe/uapi: Add flag for consulting madvise hints on svm prefetch
  drm/xe/svm: Consult madvise preferred location in prefetch
  drm/xe/uapi: Add uapi for vma count and mem attributes
  drm/xe/bo: Add attributes field to xe_bo
  drm/xe/bo: Update atomic_access attribute on madvise

 drivers/gpu/drm/drm_gpusvm.c           |  94 +----
 drivers/gpu/drm/drm_gpuvm.c            |  93 ++++-
 drivers/gpu/drm/nouveau/nouveau_uvmm.c |   1 +
 drivers/gpu/drm/xe/Makefile            |   1 +
 drivers/gpu/drm/xe/xe_bo.c             |  21 +-
 drivers/gpu/drm/xe/xe_bo_types.h       |   5 +
 drivers/gpu/drm/xe/xe_device.c         |   4 +
 drivers/gpu/drm/xe/xe_gt_pagefault.c   |  24 +-
 drivers/gpu/drm/xe/xe_pt.c             |  91 +++--
 drivers/gpu/drm/xe/xe_svm.c            | 240 +++++++++---
 drivers/gpu/drm/xe/xe_svm.h            | 128 ++++++
 drivers/gpu/drm/xe/xe_vm.c             | 518 +++++++++++++++++++++++--
 drivers/gpu/drm/xe/xe_vm.h             |  10 +-
 drivers/gpu/drm/xe/xe_vm_madvise.c     | 375 ++++++++++++++++++
 drivers/gpu/drm/xe/xe_vm_madvise.h     |  15 +
 drivers/gpu/drm/xe/xe_vm_types.h       |  43 +-
 include/drm/drm_gpusvm.h               |  98 ++++-
 include/drm/drm_gpuvm.h                |  25 +-
 include/uapi/drm/xe_drm.h              | 213 ++++++++++
 19 files changed, 1745 insertions(+), 254 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_vm_madvise.c
 create mode 100644 drivers/gpu/drm/xe/xe_vm_madvise.h

-- 
2.34.1