[Intel-xe] [PATCH V13 0/6] drm/xe: Add engine scheduler control interface

[Tejas Upadhyay]

Patch series introduces this in several patches,
1. Add basic directory engine class under its GT, as below
   DUT# cat /sys/class/drm/cardX/device/tileN/gtN/engines/
   ccs/ bcs/
2. Add default entries with its value for user to go back
   to default
3,4,5 : Add individual engine properties sysfs entry
6: Introduce min/max to control in what range these properties
   can be set for elevated and non-elevated users.

VLK-46764, VLK-46767

V13:
   - Add missing drmm_add_action_or_reset and remove sysfs files 
V12:
   - Rebase on tip
V11:
   - Make engine_get_prop_minmax and enforce_sched_limit static - Matt
   - use enum in place of string in engine_get_prop_minmax - Matt
   - no need to use enforce_sched_limit or no need to filter min/max
     per user type in sysfs - Matt
   - Dont include xe_gt.h in individual .h - Matt
V10:
   - Add kernel doc for non static APIs - Matt
   - Add helper for getting min-max range - Matt
   - Filter min/max based on user type
V9 :
   - Rebase to use s/xe_engine/xe_hw_engine/ - Matt
   - Remove init_done from class_intf instead check member
     is initialized - Matt
V8 :
   - Modify enforce_sched_limit logic - Niranjana
   - make sure min < max - Niranjana
   - Push all errors to common err path - Niranjana
V7 :
   - access engine class interface inplace of hw engine - Niranjana
   - Use some API to lower down duplication of code
   - Return EINVAL in place of EPERM
V6 :
   - Scheduling props should apply per class engine not per hardware engine - Matt
   - Do not record value of job_timeout_ms if changed based on dma_fence - Matt
   - Removed timeout validation check as range validation covers it
   - Rebase all the patches based on above changes
V5 :
   - Rebase to resolve conflicts - CI
V4 :
    - Rebase the series
    - Add CONFIG option to enable/disable min/max limitation on
      elevated user - Matt/Joonas
    - Movement of engine related code to its own file
V3 :
    - Improve class_mask logic
V2 :
    - Rebase to solve conflicts
    - Use sysfs_create_files in this patch - Niranjana
    - Handle prototype error for xe_add_engine_defaults - CI hooks
    - Remove unused member sysfs_hwe - Niranjana
    - Restric min/max setting to #define default min/max for
         elevated user - Himal
    - Remove some unrelated changes from patch - Niranjana

Testcase: https://gitlab.freedesktop.org/drm/igt-gpu-tools/-/commit/94ccbe7cdf8651d5b76588102eca545cb74caad8
Testcase: https://gitlab.freedesktop.org/drm/igt-gpu-tools/-/commit/0753ddf646df691cd1d2219192ce3a629f3e7e3f
Updated Testcase: https://patchwork.freedesktop.org/series/121046/
Tested-by: Priyanka Dandamudi <priyanka.dandamudi at intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay at intel.com>

Tejas Upadhyay (6):
  drm/xe: Add sysfs entries for engines under its GT
  drm/xe: Add sysfs for default engine scheduler properties
  drm/xe: Add job timeout engine property to sysfs
  drm/xe: Add timeslice duration engine property to sysfs
  drm/xe: Add sysfs for preempt reset timeout
  drm/xe: Add min/max cap for engine scheduler properties

 drivers/gpu/drm/xe/Kconfig                    |   6 +
 drivers/gpu/drm/xe/Kconfig.profile            |  46 ++
 drivers/gpu/drm/xe/Makefile                   |   1 +
 drivers/gpu/drm/xe/xe_exec_queue.c            |  96 ++-
 drivers/gpu/drm/xe/xe_gt.c                    |   7 +
 drivers/gpu/drm/xe/xe_gt_types.h              |   3 +
 drivers/gpu/drm/xe/xe_guc_submit.c            |   3 +-
 drivers/gpu/drm/xe/xe_hw_engine.c             |  17 +
 drivers/gpu/drm/xe/xe_hw_engine.h             |  31 +
 drivers/gpu/drm/xe/xe_hw_engine_class_sysfs.c | 675 ++++++++++++++++++
 drivers/gpu/drm/xe/xe_hw_engine_class_sysfs.h |  36 +
 drivers/gpu/drm/xe/xe_hw_engine_types.h       |  37 +
 12 files changed, 948 insertions(+), 10 deletions(-)
 create mode 100644 drivers/gpu/drm/xe/Kconfig.profile
 create mode 100644 drivers/gpu/drm/xe/xe_hw_engine_class_sysfs.c
 create mode 100644 drivers/gpu/drm/xe/xe_hw_engine_class_sysfs.h

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2.25.1