[PATCH v3 00/16] drm/msm/a8xx: GPU state capture support

[Rob Clark <robin.clark@oss.qualcomm.com>]

This series introduces gen8 devcoredump support.  Compared to previous
gens, it:

1. Switches to generated tables.  Compared to hand modifying headers from
   kgsl (which were originally generated, then adjusted a bit by hand before
   adding to kgsl tree.  And then copied to drm/msm and lightly modified
   some more in the process).

   In the process, we also switch to generated cp_protect tables.

2. Aligns to the "snapshot" format that kgsl/etc use for hw state capture.
   The non-generation specific bits (SMMU fault info, capturing relevant
   BOs, etc) still works as before.  Everything gen8 specific gets encoded
   as "snapshot" sections, ascii85 encoded in the resulting devcoredump
   file (similar to captured BOs).

3. Try to make it easier to at least compare kgsl snapshot code with
   upstream, for porting fixes/etc.  State capture is tedious and mind-
   numbing, and the last thing you want to do when debugging a GPU hang
   is going down the rabbit hole of having to first debug gpu state
   capture.

   However, I don't love kgsl_snapshot_add_section().  It does avoid
   duplicating snapshot header stuff everywhere.  But the ergonomics
   are not great.  So instead I went with "align with what I wish kgsl
   looked like..

The mesa/crashdec side of this is at:

   https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/45304

I'd appreciate tested-by's on Hawi, Maili, Milos, and Pakala, since I
don't have these devices at-hand to test myself.  To test devcoredump,
you can use the msm_recovery test in igt.. or just:

  cat /sys/kernel/debug/dri/*/gpu > /dev/null

NOTE: I'm still tracking down some descrepancies compared to kgsl.  I
      think at least we should be matching on the excluded access-
      protected regs, so hopefully collecting a devcoredump doesn't
      make things go boom.  Tested on glymur (windows fw) and on
      kaanapali MTP (android fw).

NOTE: Uses $codename for generated file/table names, rather than continue
      to perpetuate the equally meaningless gen8_x_y naming from kgsl into 
      upstream.  At least the codenames are familiar upstream and this
      removes an extra level of name translation.

v3:
- Drop generated nonctx list for now
- Exclude access protected registers
- Shuffle around some debugbus blocks to match kgsl
- Use CP_PROTECT_PIPE regs to pickup the extra spans if we exceed the
  64 CP_PROTECT_GLOBAL regs
- Inhibit IFPC for gpu debugfs dump
- Fix cx_dbgc capture
- Misc other small fixes
- Link to v2: https://lore.kernel.org/all/20261021204244.67160-1-robin.clark@oss.qualcomm.com/

v2:
- Fix incorrect protect list for Kaanapali
- Use __free() for snapshot_sect finalization
- Fix missing early return error path in gen8_snapshot_mempool()
- Fix aperture setting in gen8_legacy_snapshot_mvc()
- Fix first_slice in gen8_snapshot_mempool()
- Remove GBIF regs in generated nonctx list
- Link to v1: https://lore.kernel.org/all/20261020204728.28844-1-robin.clark@oss.qualcomm.com/

Rob Clark (16):
  drm/msm: Import adreno_snapshot.h
  drm/msm/a8xx: Export aperture helpers
  drm/msm/a8xx: Add a8xx_aperture_acquire_raw()
  drm/msm/a8xx: Export slice helper
  drm/msm/a8xx: Add missing a850 ifpc reglist entries
  drm/msm/a8xx: Allow nonctx reglist to include GMU regs
  drm/msm/a8xx: Stop getting GMEM_PROTECT from nonctx list
  drm/msm/adreno: Fix PROTECT span length
  drm/msm/adreno: add temporary __maybe_unused
  drm/msm/a8xx: Import generated headers
  drm/msm: Inhibit IFPC for state snapshot
  drm/msm/a8xx: devcoredump state capture support
  drm/msm/a8xx: Add all CP_PROTECT_PIPE to pwrup reglist
  drm/msm/a8xx: Use CP_PROTECT_PIPE regs
  drm/msm/a8xx: Switch to generated protect regs
  drm/msm/adreno: Remove temporary __maybe_unused

 drivers/gpu/drm/msm/Makefile                  |    4 +-
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c         |    7 +
 drivers/gpu/drm/msm/adreno/a6xx_gpu.h         |   14 +-
 drivers/gpu/drm/msm/adreno/a8xx_catalog.c     |  398 +--
 drivers/gpu/drm/msm/adreno/a8xx_gpu.c         |   65 +-
 drivers/gpu/drm/msm/adreno/a8xx_gpu_state.c   | 1402 ++++++++++
 .../gpu/drm/msm/adreno/adreno_gen8_snapshot.h |  576 ++++
 drivers/gpu/drm/msm/adreno/adreno_gpu.h       |    2 +
 drivers/gpu/drm/msm/adreno/adreno_snapshot.h  |  529 ++++
 .../drm/msm/adreno/catalog/adreno_glymur.h    | 2307 ++++++++++++++++
 .../gpu/drm/msm/adreno/catalog/adreno_hawi.h  | 2387 +++++++++++++++++
 .../drm/msm/adreno/catalog/adreno_kaanapali.h | 2317 ++++++++++++++++
 .../gpu/drm/msm/adreno/catalog/adreno_maili.h | 1882 +++++++++++++
 .../gpu/drm/msm/adreno/catalog/adreno_milos.h | 1977 ++++++++++++++
 .../drm/msm/adreno/catalog/adreno_pakala.h    | 2161 +++++++++++++++
 drivers/gpu/drm/msm/msm_debugfs.c             |   10 +
 drivers/gpu/drm/msm/registers/adreno/a6xx.xml |    4 +
 17 files changed, 15726 insertions(+), 316 deletions(-)
 create mode 100644 drivers/gpu/drm/msm/adreno/a8xx_gpu_state.c
 create mode 100644 drivers/gpu/drm/msm/adreno/adreno_gen8_snapshot.h
 create mode 100644 drivers/gpu/drm/msm/adreno/adreno_snapshot.h
 create mode 100644 drivers/gpu/drm/msm/adreno/catalog/adreno_glymur.h
 create mode 100644 drivers/gpu/drm/msm/adreno/catalog/adreno_hawi.h
 create mode 100644 drivers/gpu/drm/msm/adreno/catalog/adreno_kaanapali.h
 create mode 100644 drivers/gpu/drm/msm/adreno/catalog/adreno_maili.h
 create mode 100644 drivers/gpu/drm/msm/adreno/catalog/adreno_milos.h
 create mode 100644 drivers/gpu/drm/msm/adreno/catalog/adreno_pakala.h

-- 
2.56.0