[PATCH v10 00/11] Add generic memory shrinker to VirtIO-GPU and Panfrost DRM drivers

[Dmitry Osipenko <dmitry.osipenko@collabora.com>]

This series:

  1. Makes minor fixes for drm_gem_lru and Panfrost
  2. Brings refactoring for older code
  3. Adds common drm-shmem memory shrinker
  4. Enables shrinker for VirtIO-GPU driver
  5. Switches Panfrost driver to the common shrinker

Changelog:

v10:- Rebased on a recent linux-next.

    - Added Rob's ack to MSM "Prevent blocking within shrinker loop" patch.

    - Added Steven's ack/r-b/t-b for the Panfrost patches.

    - Fixed missing export of the new drm_gem_object_evict() function.

    - Added fixes tags to the first two patches that are making minor fixes,
      for consistency.

v9: - Replaced struct drm_gem_shmem_shrinker with drm_gem_shmem and
      moved it to drm_device, like was suggested by Thomas Zimmermann.

    - Replaced drm_gem_shmem_shrinker_register() with drmm_gem_shmem_init(),
      like was suggested by Thomas Zimmermann.

    - Moved evict() callback to drm_gem_object_funcs and added common
      drm_gem_object_evict() helper, like was suggested by Thomas Zimmermann.

    - The shmem object now is evictable by default, like was suggested by
      Thomas Zimmermann. Dropped the set_evictable/purgeble() functions
      as well, drivers will decide whether BO is evictable within theirs
      madvise IOCTL.

    - Added patches that convert drm-shmem code to use drm_WARN_ON() and
      drm_dbg_kms(), like was requested by Thomas Zimmermann.

    - Turned drm_gem_shmem_object booleans into 1-bit bit fields, like was
      suggested by Thomas Zimmermann.

    - Switched to use drm_dev->unique for the shmem shrinker name. Drivers
      don't need to specify the name explicitly anymore.

    - Re-added dma_resv_test_signaled() that was missing in v8 and also
      fixed its argument to DMA_RESV_USAGE_READ. See comment to
      dma_resv_usage_rw().

    - Added new fix for Panfrost driver that silences lockdep warning
      caused by shrinker. Both Panfrost old and new shmem shrinkers are
      affected.

v8: - Rebased on top of recent linux-next that now has dma-buf locking
      convention patches merged, which was blocking shmem shrinker before.

    - Shmem shrinker now uses new drm_gem_lru helper.

    - Dropped Steven Price t-b from the Panfrost patch because code
      changed significantly since v6 and should be re-tested.

v7: - dma-buf locking convention

v6: https://lore.kernel.org/dri-devel/20220526235040.678984-1-dmitry.osipenko@collabora.com/

Related patches:

Mesa: https://gitlab.freedesktop.org/digetx/mesa/-/commits/virgl-madvise
igt:  https://gitlab.freedesktop.org/digetx/igt-gpu-tools/-/commits/virtio-madvise
      https://gitlab.freedesktop.org/digetx/igt-gpu-tools/-/commits/panfrost-madvise

The Mesa and IGT patches will be sent out once the kernel part will land.

Dmitry Osipenko (11):
  drm/msm/gem: Prevent blocking within shrinker loop
  drm/panfrost: Don't sync rpm suspension after mmu flushing
  drm/gem: Add evict() callback to drm_gem_object_funcs
  drm/shmem: Put booleans in the end of struct drm_gem_shmem_object
  drm/shmem: Switch to use drm_* debug helpers
  drm/shmem-helper: Don't use vmap_use_count for dma-bufs
  drm/shmem-helper: Switch to reservation lock
  drm/shmem-helper: Add memory shrinker
  drm/gem: Add drm_gem_pin_unlocked()
  drm/virtio: Support memory shrinking
  drm/panfrost: Switch to generic memory shrinker

 drivers/gpu/drm/drm_gem.c                     |  54 +-
 drivers/gpu/drm/drm_gem_shmem_helper.c        | 646 +++++++++++++-----
 drivers/gpu/drm/lima/lima_gem.c               |   8 +-
 drivers/gpu/drm/msm/msm_gem_shrinker.c        |   8 +-
 drivers/gpu/drm/panfrost/Makefile             |   1 -
 drivers/gpu/drm/panfrost/panfrost_device.h    |   4 -
 drivers/gpu/drm/panfrost/panfrost_drv.c       |  34 +-
 drivers/gpu/drm/panfrost/panfrost_gem.c       |  30 +-
 drivers/gpu/drm/panfrost/panfrost_gem.h       |   9 -
 .../gpu/drm/panfrost/panfrost_gem_shrinker.c  | 122 ----
 drivers/gpu/drm/panfrost/panfrost_job.c       |  18 +-
 drivers/gpu/drm/panfrost/panfrost_mmu.c       |  21 +-
 drivers/gpu/drm/virtio/virtgpu_drv.h          |  18 +-
 drivers/gpu/drm/virtio/virtgpu_gem.c          |  52 ++
 drivers/gpu/drm/virtio/virtgpu_ioctl.c        |  37 +
 drivers/gpu/drm/virtio/virtgpu_kms.c          |   8 +
 drivers/gpu/drm/virtio/virtgpu_object.c       | 132 +++-
 drivers/gpu/drm/virtio/virtgpu_plane.c        |  22 +-
 drivers/gpu/drm/virtio/virtgpu_vq.c           |  40 ++
 include/drm/drm_device.h                      |  10 +-
 include/drm/drm_gem.h                         |  19 +-
 include/drm/drm_gem_shmem_helper.h            | 112 +--
 include/uapi/drm/virtgpu_drm.h                |  14 +
 23 files changed, 1010 insertions(+), 409 deletions(-)
 delete mode 100644 drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c

-- 
2.38.1