[PATCH v8 0/7] drm/tyr: firmware loading and MCU boot support

[Deborah Brouwer]

This series adds firmware loading and MCU boot support to the Tyr DRM
driver. It includes:
 - A parser for the Mali CSF firmware binary format
 - A kernel-managed BO type (KernelBo) for internal driver allocations
 - GPU virtual memory (VM) integration using drm_gpuvm
 - An MMU module and a generic slot manager
 - Loading firmware, VM activation, and MCU boot at probe()

It is based on drm-rust-next but also depends on:

1. [PATCH v3] rust: iommu: add device lifetime to IoPageTable
   https://lore.kernel.org/rust-for-linux/20260703-pgtable_lt_b4-v3-1-e738e1f513a4@xxxxxxxxxxxxx

2. [PATCH] drm: Remove DRIVER_GEM_GPUVA feature flag
   https://lore.kernel.org/dri-devel/20260421084701.24227-1-laura.nao@xxxxxxxxxxxxx/
   This patch is in drm-misc-next for v7.3:
   https://lore.kernel.org/dri-devel/20260702-powerful-successful-raptor-eded34@houat/

A branch with all dependencies is available here:
https://gitlab.freedesktop.org/dbrouwer/linux/-/commits/fw-boot-b4

Signed-off-by: Deborah Brouwer <deborah.brouwer@xxxxxxxxxxxxx>
---
Changes in v8:
- kill the vm if firmware does not initialize properly
- write to JOB_IRQ_CLEAR after MCU boots
- check that a mapping request does not run past the end of the GEM buffer
- check that the SG table gave us enough backing memory for our VA
- make the KernelBo gem object field (bo) private and add an accessor
- return unused gpuva from remap()
- always provide three gpuva to unmap() instead of two
- be stricter about interpreting MAIR bits for device and non-cacheable memory
- preserve idle slot data in case subsequent activation fails
- clear evicted slot after eviction in case a subsequent activation fails
- wait for flush and lock commands to complete before proceeding
- rewrite SectionFlags with the register macro
- use the InaBits conversion provided by the register macro
- rename the slot data argument to vm_as_data for clarity
- add various checks for size, shifting, truncating, sparse values, overflow etc.
- return errors instead of panicking from unwrap()
- use dev_* macros for all logging
- Link to v7: https://lore.kernel.org/r/20260713-fw-boot-b4-v7-0-afd8dc1494dd@xxxxxxxxxxxxx

Changes in v7:
- slot.rs: don't print an error when all slots are busy
- change all allow(dead_code) to expect(dead_code)
- use LockedSeat type alias in VmAsData
- shift the lockaddr_base so it fits properly in LOCKADDR
- replace core::fmt with kernel::fmt
- make SAFETY comments clearer for map/unmap pages
- fix arm 32-bit build failures
- release gpuvm_unique lock before calling deferred_cleanup
- Link to v6: https://lore.kernel.org/r/20260709-fw-boot-b4-v6-0-ca391e1a4108@xxxxxxxxxxxxx

Changes in v6:
- Move gpu_info from drm::Driver::Data to RegistrationData
  and remove drm::Driver::Data entirely.
- Remove the extra drm::Device ARef in TyrPlatformDriverData
  since drm::Registration already owns an ARef to the drm::Device.
- Stop storing platform::Device ARef in firmware since it is unused.
- Pass a generic kernel::Device instead of the platform::Device through
  firmware to Vm and pagetables since this is all that they need.
- Link to v5: https://lore.kernel.org/r/20260708-fw-boot-b4-v5-0-7792ab68e359@xxxxxxxxxxxxx

Changes in v5:
- Reduce the scope of this series back to just MCU booting.
- Drop the CSF global interface, job IRQ, wait, and arch timer patches
  since they will be sent as subsequent series.
- Add lifetimes to resources and store them in TyrRegistrationData.

- Link to v4: https://lore.kernel.org/r/20260424-b4-fw-boot-v4-v4-0-a5d91050789d@xxxxxxxxxxxxx

Changes in v4:
 New commits:
  - drm/tyr: program CSF global interface
  - rust: time: add arch_timer_get_rate wrapper
  - drm/tyr: add CSF firmware interface support
  - drm/tyr: validate presence of CSF shared section
  - drm/tyr: wait for global interface readiness
  - drm/tyr: add Job IRQ handling
  - drm/tyr: add Wait type for GPU events

 The existing commits from v3 remain unchanged.
 - Link to v3: https://lore.kernel.org/r/20260413-b4-fw-boot-v3-v3-0-b422f3c03885@xxxxxxxxxxxxx
    
Changes in v3:
 New commits:
  - drm/tyr: remove unused device from platform data
  - drm/tyr: use shmem GEM object type in TyrDrmDriver
    
 drm/tyr: select required dependencies in Kconfig
  - Rename commit since the dependencies are not limited to DRM.
  - Select new RUST_DRM_GEM_SHMEM_HELPER instead of DRM_GEM_SHMEM_HELPER.
    
 drm/tyr: set DMA mask using GPU physical address
  - Use register macro to read pa_bits instead of separate helper function.
    
 drm/tyr: add MMU module
  - Switch MMU code to typed register APIs (TRANSCFG, MEMATTR, STATUS, LOCKADDR, etc.).
  - Use MmuCommand enum for MMU commands instead of raw constants.
  - Minor cleanups and renaming (MAX_AS, AS_PRESENT handling).
    
 drm/tyr: add GPU virtual memory module
  - Extract VA/PA bits via typed MMU_FEATURES register.
  - Update the VM code to match the new GPUVM v6 and shmem GEM v10 APIs.
    
 drm/tyr: add a kernel buffer object
  - Reject zero-sized KernelBo allocations up front.
    
 drm/tyr: add firmware loading and MCU boot support
  - Use typed GPU control registers.
  - Pass iomem by Arc into Firmware::new() since we store it eventually.
    
  - Link to v2: https://lore.kernel.org/rust-for-linux/20260302232500.244489-1-deborah.brouwer@xxxxxxxxxxxxx/
    
Changes in v2:
 - The whole series is rebased on drm-rust-next including v7.0-rc1.
 - Each patch has its own changelog.
    
 Link to v1: https://lore.kernel.org/rust-for-linux/20260212013713.304343-1-deborah.brouwer@xxxxxxxxxxxxx/

---
Boris Brezillon (3):
      drm/tyr: add a generic slot manager
      drm/tyr: add Memory Management Unit (MMU) support
      drm/tyr: add GPU virtual memory (VM) support

Daniel Almeida (1):
      drm/tyr: add parser for firmware binary

Deborah Brouwer (3):
      drm/tyr: add resources to RegistrationData
      drm/tyr: add a kernel buffer object
      drm/tyr: add Microcontroller Unit (MCU) booting

 drivers/gpu/drm/tyr/Kconfig              |   5 +
 drivers/gpu/drm/tyr/driver.rs            |  64 ++-
 drivers/gpu/drm/tyr/file.rs              |  11 +-
 drivers/gpu/drm/tyr/fw.rs                | 292 ++++++++++
 drivers/gpu/drm/tyr/fw/parser.rs         | 550 ++++++++++++++++++
 drivers/gpu/drm/tyr/gem.rs               | 134 ++++-
 drivers/gpu/drm/tyr/mmu.rs               | 120 ++++
 drivers/gpu/drm/tyr/mmu/address_space.rs | 509 +++++++++++++++++
 drivers/gpu/drm/tyr/regs.rs              | 135 ++++-
 drivers/gpu/drm/tyr/slot.rs              | 391 +++++++++++++
 drivers/gpu/drm/tyr/tyr.rs               |   4 +
 drivers/gpu/drm/tyr/vm.rs                | 931 +++++++++++++++++++++++++++++++
 12 files changed, 3114 insertions(+), 32 deletions(-)
---
base-commit: 337c44a2f50c9008273a338f518cc552f6b08567
change-id: 20260708-fw-boot-b4-f07706a265c7

Best regards,
-- 
Deborah Brouwer <deborah.brouwer@xxxxxxxxxxxxx>