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: v12:- Fixed the "no previous prototype for function" warning reported by kernel build bot for v11. - Fixed the missing reservation lock reported by Intel CI for VGEM driver. Other drivers using drm-shmem were affected similarly to VGEM. The problem was in the dma-buf attachment code path that led to drm-shmem pinning function which assumed the held reservation lock by drm_gem_pin(). In the past that code path was causing trouble for i915 driver and we've changed the locking scheme for the attachment code path in the dma-buf core to let exporters to handle the locking themselves. After a closer investigation, I realized that my assumption about testing of dma-buf export code path using Panfrost driver was incorrect. Now I created additional local test to exrecise the Panfrost export path. I also reproduced the issue reported by the Intel CI for v10. It's all fixed now by making the drm_gem_shmem_pin() to take the resv lock by itself. - Patches are based on top of drm-tip, CC'd intel-gfx CI for testing. 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@xxxxxxxxxxxxx/T/ Dmitry Osipenko (11): drm/shmem-helper: Switch to reservation lock 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: Export drm_gem_pin/unpin() drm/virtio: Support memory shrinking drm/panfrost: Switch to generic memory shrinker drivers/gpu/drm/drm_gem.c | 2 + drivers/gpu/drm/drm_gem_shmem_helper.c | 613 ++++++++++++++---- drivers/gpu/drm/drm_internal.h | 2 - drivers/gpu/drm/lima/lima_gem.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 | 19 +- 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 | 83 ++- include/uapi/drm/virtgpu_drm.h | 14 + 23 files changed, 917 insertions(+), 369 deletions(-) delete mode 100644 drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c -- 2.39.2