[PATCH v2 0/9] drm/tyr: add debugfs support

Add debugfs support for the Tyr DRM driver.

The series adds a SeqShow trait for seq_file-backed debugfs files with
lifecycle hooks, a DrmSeqShow adapter with DRM device lifecycle
management, and a gpuvas debugfs file in Tyr exposing GPU VA space
information.

Additionally, fix a use-after-free in the DRM debugfs open/release
paths where a device could be unregistered while a debugfs file remains
open.

This is based on drm-rust-next and depends on:

[PATCH v10 0/7] drm/tyr: firmware loading and MCU boot support
  https://lore.kernel.org/r/[email protected]

See the full dependency and commit history at [1].

Link: https://gitlab.freedesktop.org/panfrost/linux/-/issues/11
Link: https://gitlab.freedesktop.org/panfrost/linux/-/merge_requests/59 [1]
Signed-off-by: Alvin Sun <[email protected]>
---
Changes in v2:
- Reworked the debugfs implementation per feedback from Danilo on v1:
  dropped the hazptr/revocable-based approach in favor of the DRM
  debugfs_init callback and generic seq_file abstractions.
- Fixed a UAF in drm_debugfs where a device could be unregistered while
  a debugfs file remains open (drm_dev_get/put across file lifetime).
- Link to v1: https://lore.kernel.org/r/[email protected]

---
Alvin Sun (9):
      rust: seq_file: add as_raw() method
      rust: debugfs: add SeqShow trait and seq_file file operations
      rust: debugfs: add Entry::from_raw and ScopedDir::from_dentry
      drm: move debugfs_init after dev->registered is set
      rust: drm: add debugfs_init callback to Driver trait
      rust: drm: add DrmSeqShow seq_file adapter
      rust: drm: gpuvm: add dump_gpuva_info to UniqueRefGpuVm
      drm/tyr: add gpuvas debugfs file
      drm/debugfs: hold device reference for the lifetime of open files

 drivers/gpu/drm/drm_debugfs.c   | 45 ++++++++++++++++---
 drivers/gpu/drm/drm_drv.c       |  5 +++
 drivers/gpu/drm/tyr/debugfs.rs  | 65 +++++++++++++++++++++++++++
 drivers/gpu/drm/tyr/driver.rs   | 16 +++++++
 drivers/gpu/drm/tyr/fw.rs       |  8 ++++
 drivers/gpu/drm/tyr/tyr.rs      |  1 +
 drivers/gpu/drm/tyr/vm.rs       |  5 +++
 rust/bindings/bindings_helper.h |  1 +
 rust/kernel/debugfs.rs          | 35 ++++++++++++++-
 rust/kernel/debugfs/entry.rs    | 15 ++++++-
 rust/kernel/debugfs/file_ops.rs | 97 +++++++++++++++++++++++++++++++++++++++++
 rust/kernel/debugfs/traits.rs   | 30 ++++++++++++-
 rust/kernel/drm/debugfs.rs      | 49 +++++++++++++++++++++
 rust/kernel/drm/device.rs       | 36 ++++++++++++++-
 rust/kernel/drm/driver.rs       | 11 +++++
 rust/kernel/drm/gpuvm/mod.rs    |  8 ++++
 rust/kernel/drm/mod.rs          |  1 +
 rust/kernel/seq_file.rs         |  6 +++
 18 files changed, 422 insertions(+), 12 deletions(-)
---
base-commit: 0ffc014cb2abfc79d161662b125e085b3e7107e7
change-id: 20260730-tyr-debugfs-v2-608cef77d6e9

Best regards,
-- 
Alvin Sun <[email protected]>