[PATCH 0/3] Use hmm_range_fault to populate user page

[Oak Zeng <oak.zeng@intel.com>]

This is an effort to unify hmmptr (system allocator) and userptr.
A helper xe_userptr_populate_range is created to populate a user
page using hmm_range_fault, instead of using get_user_pages_fast.
This helper is then used to replace some userptr codes.

The same help will be used later for hmmptr.

This is part of the hmmptr (system allocator) codes. Since this
part can be merged separately, send it out for CI and review first.
It will be followed by other hmmptr codes.

Oak Zeng (3):
  drm/xe: Introduce helper to populate userptr
  drm/xe: Introduce a helper to free sg table
  drm/xe: Use hmm_range_fault to populate user pages

 drivers/gpu/drm/xe/Kconfig  |   1 +
 drivers/gpu/drm/xe/Makefile |   2 +
 drivers/gpu/drm/xe/xe_hmm.c | 254 ++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/xe/xe_hmm.h |  18 +++
 drivers/gpu/drm/xe/xe_vm.c  | 122 ++---------------
 5 files changed, 287 insertions(+), 110 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/xe_hmm.c
 create mode 100644 drivers/gpu/drm/xe/xe_hmm.h

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2.26.3