[PATCH 0/8] panfrost: Fixes for 5.4

[Boris Brezillon]

Hello,

I've recently come to test a 5.4 kernel on a rk3288 platform (T760),
and, as reported by many people on #panfrost, I've hit a page-fault
storm when running various GL apps.

This series tries to address the problems I could spot during my debug
session, with patch 7 being the most invasive change. I wish I
could find an easier way to fix the "BO mapping teared down while GPU
jobs referencing it are in-flight" problem, as I don't like tagging
complex changes for stable, but this is the best I could come up with.

Let me know if you have better ideas.

Regards,

Boris

Boris Brezillon (8):
  drm/panfrost: Make panfrost_job_run() return an ERR_PTR() instead of
    NULL
  drm/panfrost: Fix a race in panfrost_ioctl_madvise()
  drm/panfrost: Fix a BO leak in panfrost_ioctl_mmap_bo()
  drm/panfrost: Fix a race in panfrost_gem_free_object()
  drm/panfrost: Open/close the perfcnt BO
  drm/panfrost: Make sure imported/exported BOs are never purged
  drm/panfrost: Add the panfrost_gem_mapping concept
  drm/panfrost: Make sure the shrinker does not reclaim referenced BOs

 drivers/gpu/drm/panfrost/panfrost_drv.c       | 132 +++++++++++--
 drivers/gpu/drm/panfrost/panfrost_gem.c       | 184 +++++++++++++++---
 drivers/gpu/drm/panfrost/panfrost_gem.h       |  51 ++++-
 .../gpu/drm/panfrost/panfrost_gem_shrinker.c  |   6 +-
 drivers/gpu/drm/panfrost/panfrost_job.c       |  22 ++-
 drivers/gpu/drm/panfrost/panfrost_job.h       |   1 +
 drivers/gpu/drm/panfrost/panfrost_mmu.c       |  61 +++---
 drivers/gpu/drm/panfrost/panfrost_mmu.h       |   6 +-
 drivers/gpu/drm/panfrost/panfrost_perfcnt.c   |  49 +++--
 drivers/gpu/drm/panfrost/panfrost_perfcnt.h   |   2 +-
 10 files changed, 416 insertions(+), 98 deletions(-)

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2.23.0