[0/8] Enable triggered perf query for Xe_HP

Message

Umesh Nerlige Ramappa Aug. 30, 2021, 7:38 p.m. UTC

This is a revival of the patch series to support triggered perf query reports
from here - https://patchwork.freedesktop.org/series/83831/

The patches were not pushed earlier because corresponding UMD changes were
missing. This revival addresses UMD changes in GPUvis for this series. GPUvis
uses the perf library in igt-gpu-tools. Changes to the library are here -
https://patchwork.freedesktop.org/series/93355/

GPUvis changes will be posted as a PR once the above library and kernel changes
are pushed.

Summary of the feature:

Current platforms provide MI_REPORT_PERF_COUNT to query a snapshot of perf
counters from a batch. This mechanism does not have consistent support on all
engines for newer platforms. To support perf query, all new platforms use a
mechanism to trigger OA report snapshots into the OA buffer by writing to a HW
register from a batch. To lookup this report in the OA buffer quickly, the OA
buffer is mmapped into the user space.

This series implements the new query mechanism.

v2: Fix BAT failure (Umesh)
v3: Fix selftest (Umesh)
v4: Update uapi comment (Umesh)

Test-with: [e-mail]
Signed-off-by: Umesh Nerlige Ramappa <[e-mail]>

Chris Wilson (3):
  drm/i915/gt: Refactor _wa_add to reuse wa_index and wa_list_grow
  drm/i915/gt: Check for conflicting RING_NONPRIV
  drm/i915/gt: Enable dynamic adjustment of RING_NONPRIV

Piotr Maciejewski (1):
  drm/i915/perf: Ensure observation logic is not clock gated

Umesh Nerlige Ramappa (4):
  drm/i915/gt: Lock intel_engine_apply_whitelist with uncore->lock
  drm/i915/perf: Whitelist OA report trigger registers
  drm/i915/perf: Whitelist OA counter and buffer registers
  drm/i915/perf: Map OA buffer to user space for gen12 performance query

 drivers/gpu/drm/i915/gem/i915_gem_mman.c      |   2 +-
 drivers/gpu/drm/i915/gem/i915_gem_mman.h      |   2 +
 drivers/gpu/drm/i915/gt/intel_workarounds.c   | 269 +++++++++++++-----
 drivers/gpu/drm/i915/gt/intel_workarounds.h   |   7 +
 .../gpu/drm/i915/gt/selftest_workarounds.c    | 267 +++++++++++++++++
 drivers/gpu/drm/i915/i915_perf.c              | 228 ++++++++++++++-
 drivers/gpu/drm/i915/i915_perf_types.h        |   8 +
 drivers/gpu/drm/i915/i915_reg.h               |  30 +-
 include/uapi/drm/i915_drm.h                   |  33 +++
 9 files changed, 758 insertions(+), 88 deletions(-)