[PATCH v1 00/16] Introduce page table types, vmm and bar1 mapping support

[Joel Fernandes <joelagnelf@nvidia.com>]

This series introduces page-table types and a Virtual Memory Manager (VMM)
for the nova-core driver, plus a BAR1 user (with selftests) layered on top.
The page-table layer uses trait-based generics (PteOps, PdeOps, DualPdeOps,
MmuConfig) to dispatch between MMU v2 and v3 formats. The Vmm tracks
virtual-address ranges with a maple tree, and the BAR1 user exposes mapped
CPU access to VRAM through a small allocation API exercised by the selftests.

This series is based on drm-rust-next.

It depends on the prerequisite series "Introduce nova-core mm prerequisites"
posted alongside this one:
https://lore.kernel.org/all/20260518180342.2387845-1-joelagnelf@nvidia.com/
Please apply the prerequisite series first, or pull the git tag below which
contains everything.

Dependencies (not yet merged):

- Alexandre Courbot's bitfield series. Tested on v2:
  https://lore.kernel.org/all/20260409-bitfield-v2-0-23ac400071cb@nvidia.com/
  A newer v3 of bitfield is available and should also work (haven't tested):
  https://lore.kernel.org/all/20260501-bitfield-v3-0-aa1076c3337d@nvidia.com/

- rust: maple_tree: implement Send and Sync for MapleTree (v3):
  https://lore.kernel.org/all/20260511143604.3848176-1-joelagnelf@nvidia.com/

The git tree (containing the dependencies above, the prerequisite series
"Introduce nova-core mm prerequisites", and this series) can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git (tag: nova-mm-v1-20260518)

Change log:

Changes from v12 to v1 (split-out):

- Part 2 of 2; depends on the prereq series posted just before:
  https://lore.kernel.org/all/20260518180342.2387845-1-joelagnelf@nvidia.com/
- Kept the virtual-memory portion of v12's "Add common memory management types" patch here as "Add common types for virtual memory management".
- Folded v12's "Add TLB flush support" into a new "Add buddy allocator and TLB to GpuMm" patch.
- Split v12's "Add page table entry operation traits" into PteOps, PdeOps, and DualPdeOps trait patches.
- Extracted "Add MmuConfig trait" into its own patch.
- Moved "rust: maple_tree: Send and Sync" out as a standalone dependency; VMM's maple-tree-backed range tracking remains.
- Smaller code touch-ups across most carried-over patches.

Link to v12: https://lore.kernel.org/all/20260425211454.174696-1-joelagnelf@nvidia.com/

Joel Fernandes (16):
  gpu: nova-core: mm: Add common types for virtual memory management
  gpu: nova-core: mm: Add buddy allocator and TLB to GpuMm
  gpu: nova-core: mm: Add common types for all page table formats
  gpu: nova-core: mm: pagetable: Add PteOps trait
  gpu: nova-core: mm: pagetable: Add PdeOps trait
  gpu: nova-core: mm: pagetable: Add DualPdeOps trait
  gpu: nova-core: mm: Add MMU v2 page table types
  gpu: nova-core: mm: Add MMU v3 page table types
  gpu: nova-core: mm: pagetable: Add MmuConfig trait
  gpu: nova-core: mm: Add page table walker for MMU v2/v3
  gpu: nova-core: mm: Add Virtual Memory Manager
  gpu: nova-core: mm: Add virtual address range tracking to VMM
  gpu: nova-core: mm: Add multi-page mapping API to VMM
  gpu: nova-core: Add BAR1 aperture type and size constant
  gpu: nova-core: mm: Add BAR1 user interface
  gpu: nova-core: mm: Add BAR1 memory management self-tests

 drivers/gpu/nova-core/Kconfig              |   1 +
 drivers/gpu/nova-core/driver.rs            |  22 +
 drivers/gpu/nova-core/gpu.rs               |  71 +++-
 drivers/gpu/nova-core/gsp/commands.rs      |   4 +-
 drivers/gpu/nova-core/gsp/fw/commands.rs   |   8 +
 drivers/gpu/nova-core/mm.rs                | 108 ++++-
 drivers/gpu/nova-core/mm/bar_user.rs       | 447 +++++++++++++++++++++
 drivers/gpu/nova-core/mm/pagetable.rs      | 414 +++++++++++++++++++
 drivers/gpu/nova-core/mm/pagetable/map.rs  | 367 +++++++++++++++++
 drivers/gpu/nova-core/mm/pagetable/ver2.rs | 271 +++++++++++++
 drivers/gpu/nova-core/mm/pagetable/ver3.rs | 421 +++++++++++++++++++
 drivers/gpu/nova-core/mm/pagetable/walk.rs | 258 ++++++++++++
 drivers/gpu/nova-core/mm/tlb.rs            | 130 ++++++
 drivers/gpu/nova-core/mm/vmm.rs            | 361 +++++++++++++++++
 drivers/gpu/nova-core/regs.rs              |  65 +++
 15 files changed, 2941 insertions(+), 7 deletions(-)
 create mode 100644 drivers/gpu/nova-core/mm/bar_user.rs
 create mode 100644 drivers/gpu/nova-core/mm/pagetable.rs
 create mode 100644 drivers/gpu/nova-core/mm/pagetable/map.rs
 create mode 100644 drivers/gpu/nova-core/mm/pagetable/ver2.rs
 create mode 100644 drivers/gpu/nova-core/mm/pagetable/ver3.rs
 create mode 100644 drivers/gpu/nova-core/mm/pagetable/walk.rs
 create mode 100644 drivers/gpu/nova-core/mm/tlb.rs
 create mode 100644 drivers/gpu/nova-core/mm/vmm.rs


base-commit: 03f35250485a1f78f5055c034ce7073b4c887636
-- 
2.34.1