[PATCH v11 00/10] Add generic memory shrinker to VirtIO-GPU and Panfrost DRM drivers

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

This series:

  1. Adds common drm-shmem memory shrinker
  2. Enables shrinker for VirtIO-GPU driver
  3. Switches Panfrost driver to the common shrinker

Changelog:

v11:- Rebased on a recent linux-next. Added new patch as a result:

        drm/shmem-helper: Export drm_gem_shmem_get_pages_sgt_locked()

        It's needed by the virtio-gpu driver to swap-in/unevict shmem
        object, previously get_pages_sgt() didn't use locking.

    - Separated the "Add memory shrinker" patch into smaller parts to ease
      the reviewing, as was requested by Thomas Zimmermann:

        drm/shmem-helper: Factor out pages alloc/release from
          drm_gem_shmem_get/put_pages()
        drm/shmem-helper: Add pages_pin_count field
        drm/shmem-helper: Switch drm_gem_shmem_vmap/vunmap to use pin/unpin
        drm/shmem-helper: Factor out unpinning part from drm_gem_shmem_purge()

    - Addessed the v10 review comments from Thomas Zimmermann: return errno
      instead of bool, sort code alphabetically, rename function and etc
      minor changes.

    - Added new patch to remove the "map->is_iomem" from drm-shmem, as
      was suggested by Thomas Zimmermann.

    - Added acks and r-b's that were given to v10.

v10:- Was partially applied to misc-fixes/next.

      https://lore.kernel.org/dri-devel/6c16f303-81df-7ebe-85e9-51bb40a8b301@collabora.com/T/

Dmitry Osipenko (10):
  drm/shmem-helper: Factor out pages alloc/release from
    drm_gem_shmem_get/put_pages()
  drm/shmem-helper: Add pages_pin_count field
  drm/shmem-helper: Switch drm_gem_shmem_vmap/vunmap to use pin/unpin
  drm/shmem-helper: Factor out unpinning part from drm_gem_shmem_purge()
  drm/shmem-helper: Add memory shrinker
  drm/shmem-helper: Remove obsoleted is_iomem test
  drm/shmem-helper: Export drm_gem_shmem_get_pages_sgt_locked()
  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                     |  29 ++
 drivers/gpu/drm/drm_gem_shmem_helper.c        | 453 ++++++++++++++++--
 drivers/gpu/drm/panfrost/Makefile             |   1 -
 drivers/gpu/drm/panfrost/panfrost_device.h    |   4 -
 drivers/gpu/drm/panfrost/panfrost_drv.c       |  27 +-
 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/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       | 137 ++++--
 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                         |   3 +
 include/drm/drm_gem_shmem_helper.h            |  69 ++-
 include/uapi/drm/virtgpu_drm.h                |  14 +
 20 files changed, 857 insertions(+), 246 deletions(-)
 delete mode 100644 drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c

-- 
2.39.2