[PATCH 0/4] rust: dma: tie DMA allocations to the device's bound lifetime

[Danilo Krummrich]

DMA allocations carry device resources (e.g. IOMMU mappings) that must not
outlive the device's bound lifetime. Add lifetime parameters to the DMA
allocation types (Coherent, CoherentBox, CoherentHandle) to enforce at compile
time that they are freed before the device is unbound.

Since DMA types with lifetime parameters are exposed through debugfs in the
nova-core driver, first drop the unnecessary T: 'static bound from the debugfs
ScopedDir file creation methods by formalizing a type invariant on FileOps.

Danilo Krummrich (4):
  rust: debugfs: drop 'static bound from ScopedDir file creation methods
  rust: dma: tie CoherentHandle to the device's bound lifetime
  samples: rust_dma: separate driver type from driver data
  rust: dma: tie Coherent and CoherentBox to the device's bound lifetime

 drivers/gpu/nova-core/falcon.rs               |   2 +-
 drivers/gpu/nova-core/fb.rs                   |   4 +-
 drivers/gpu/nova-core/firmware/booter.rs      |   2 +-
 drivers/gpu/nova-core/firmware/fsp.rs         |   8 +-
 .../nova-core/firmware/fwsec/bootloader.rs    |  12 +-
 drivers/gpu/nova-core/firmware/gsp.rs         |  14 +-
 drivers/gpu/nova-core/firmware/riscv.rs       |   8 +-
 drivers/gpu/nova-core/fsp.rs                  |  20 +--
 drivers/gpu/nova-core/gpu.rs                  |   4 +-
 drivers/gpu/nova-core/gsp.rs                  |  30 ++--
 drivers/gpu/nova-core/gsp/boot.rs             |  10 +-
 drivers/gpu/nova-core/gsp/cmdq.rs             |  35 +++--
 drivers/gpu/nova-core/gsp/commands.rs         |   2 +-
 drivers/gpu/nova-core/gsp/fw.rs               |  12 +-
 drivers/gpu/nova-core/gsp/hal.rs              |  14 +-
 drivers/gpu/nova-core/gsp/hal/gh100.rs        |  16 +-
 drivers/gpu/nova-core/gsp/hal/tu102.rs        |  34 ++---
 drivers/gpu/nova-core/gsp/sequencer.rs        |   6 +-
 rust/kernel/debugfs.rs                        |  26 +---
 rust/kernel/debugfs/entry.rs                  |   4 +-
 rust/kernel/debugfs/file_ops.rs               |  52 ++++---
 rust/kernel/dma.rs                            | 141 +++++++++---------
 rust/kernel/uaccess.rs                        |   4 +-
 samples/rust/rust_dma.rs                      |  30 ++--
 24 files changed, 241 insertions(+), 249 deletions(-)


base-commit: 45c13f3f9e3bb15fd89ff2864c6f627a3b4b4229
-- 
2.55.0