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https://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git
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Rust PCI drivers have no typed interface for locating and accessing PCIe
extended capabilities.
The SR-IOV extended capability describes VF topology and VF BARs. Expose
this information through the Rust PCI abstraction so drivers can use the
existing typed configuration-space accessors instead of raw bindings.
Define ExtCapability to associate a capability ID with a register layout,
and add ConfigSpace::find_ext_capability() to locate and project that
layout. Bound the view at the next capability or the end of extended
configuration space. Add ExtSriovRegs and a decoded VF BAR iterator that
reads and validates all six VF BAR register slots up front, yields decoded
BAR addresses and widths in logical order, and keeps the raw
configuration-space slot advancement internal. Since PCI_EXT_CAP_NEXT() is
a function-like macro, expose it through a Rust helper.
Keep raw SR-IOV registers private because PCI core owns their state. Expose
the current First VF Offset through a read-only accessor because the Nova
GSP ABI needs the raw 16-bit First VF Offset in Routing ID space. The
pci_iov_virtfn_devfn() helper instead returns the low eight bits of a
calculated VF Routing ID.
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: Gary Guo <gary@garyguo.net>
Cc: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Zhi Wang <zhiw@nvidia.com>
Link: https://patch.msgid.link/20260906060404.3336193-2-zhiw@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Add a `Device::resource_flags()` method to the PCI Rust abstraction,
wrapping the C-side static inline `pci_resource_flags()`.
The flags returned correspond to the `IORESOURCE` bitmask carried by a
PCI BAR's `struct resource`.
The immediate motivation is BAR layout discovery on NVIDIA GPUs: a
64-bit BAR consumes two consecutive Linux PCI resource slots (the lower
32 bits at index N and the upper 32 bits at index N+1, with the latter
having no flags or size of its own).
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/20260908-pci-resource-flags-v1-1-269f29f81de6@nvidia.com
Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
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Pull drm updates from Dave Airlie:
"Highlights:
- dmemcg eviction support is good for low VRAM things like Steam
Machine
- AMD adds gfx6-8 modifier support for older GPUs that enables a
bunch of wayland stuff
- i915/xe has some new hw support but also a lot of display
refactoring
Everything:
perf:
- export perf_allow_ APIs for xe
udmabuf:
- remove default size limit of 64MB
rust:
- i/o rework (signed tag from driver-core tree)
- add registration guard and registration data
- fix unbounded lifetimes in ioctl handler args
- fix a drm_dev_register race
- gem_shmem: add DmaResvGuard helper
- gpuvm: require send/sync for driver data
- implement send/sync for GpuVaAlloc and GpuVmBo
- add SmContext lifetime
- rename dma_handle to dma_address
- change pci_sriov_get_totalvfs return to unsigned int
core:
- create drm_of_get_panel_orientation
- send per-connector hotplug events
- add thunderbolt UBHR tunneling support
connector:
- add color format property
dmem:
- introduce a peak file
- accept one region per limit
- add dmemcg support for eviction
gpusvm:
- reorg code to give drivers more flexibility
atomic:
- add create_state callback and helper
- add documentation on atomic commit lifetime
buddy:
- add per-order free
- add used block scoreboard
- fix UAF
- test buffer clearance on resume
- add phys_addr->block helper
gem:
- drop DRIVER_GEM_GPUVA flag
ttm:
- be more aggressive allocating below protection limit
sched:
- add test suite for concurrent job submissions
hdmi:
- hook the color format property in helpers
mipi-dsi:
- add MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT
bridge:
- add atomic create callbacks
- drop atomic reset
- display-connector: don't autoenable HPD IRQ
- trigger initial HPD for DP
- ti-sn65dsi83: remove NO_HFP and NO_HBP mode flags
- analogix_dp: switch to DP link training helpers
dp:
- add support for DSC max delta BPP
edid:
- parse panel type from DisplayID 2.x Display Parameters
sysfb:
- improve panel, stride, framebuffer size validation
panel:
- implement ref counting for struct drm_panel
- himax-hx83121a: add backlight regulator support
- novatek-nt36672a: Inline panel init sequences
- visionox-vtdr6130: enable DSC
- novatek-nt37801: Use mipi_dsi_*_multi() functions
- samsung-s6d16d0: Fix prepare error handling
- support Novatek NT36536 plus DT bindings
- sofef00: fix backlight updates
- osd101t2587: use mipi_dsi_*_multi interface
- panel-edp: adjust timing for AUO displays
- panel-lvds: support Opto Logic SCX1001511GGC49
- panel-simple: support Kyocera tcg070wvlq
- panel-edp: quirks
- AUO B116XAT04.3, CMN N116BCP-EA2, CSW MNB601LS1-8
- BOE NV116WH2-M30, BOE NT116WHM-N21, BOE NV116FH1-M31
- BOE NV116FH1-M30, NV140FHM-N5B, TM156VDXP25
- BOE NE160QDM-NY1, MB116AS01
- new:
- Samsung ATNA40HQ08-0, Anbernic TD4310
- Chipone ICNA35XX, Ilitek ILI9488
- Ilitek ILI7807S, Renesas R63419
- MNE001BS6-2, MNF601BS4-1, Sharp LQ120P1JX51
virtio:
- add support for save/restore virtio_gpu_objects
- abort vq wait on device removal
amdgpu:
- add color format DRM property
- initial compute pipe reset support
- add GFX 6-8 modifier support
- initial DCN 6.0.0 support
- dmemcg eviction support
- improved boundary checking for bios parsing
- RAS updates and rework
- VCN secure submission fixes
- 8K panel fix
- Display KUNIT tests
- parse panel type from DisplayID
- Align IP discovery to pci device lifetime
- SOC15 register macro cleanups
- UVD memory placement fixes
- GFX9 mode2 reset fixes
- drop unnecessary BUG/BUG_ON
- GFX8 soft reset rework
- enable soft reset on GFX8
- PSP/SMU 15.0.9 update
- VI ASPM fix
- userq fixes
- amdgpu_vm_get_task_info_pasid lifetime fix
- DC CACP support
- change system_unbound_wq with system_dfl_wq
- Loosen VFCT bios parsing to deal with pci=realloc
- SI/SMU7 AC/DC switch fix
- VM fence handling fix
- GEM close optimisation
- Apple Studio Display fixes
- DC FRL fixes
amdkfd:
- initial compute pipe reset support
- allow applications to opt out of sigbus on fatal errors
- improve CRIU boundary checks
- MQD handling rework
- move TBA/TMA from system to device memory
- avoid topology-lock in kfd_mmap
- SVM eviction fixes
radeon:
- fix unset CONFIG_ACPI build
i915:
- Novalake (NVL display version 35) timing generator enabling
- NVL DC3CO enabling
- enable UBHR link rates on thunderbolt tunnels
- Reduce Xe3+ PM demand peak bandwidth
- enable pipe DMC error interrupts for display 30+
- add kunit tests for DP link config selection
- refactor and document DP link recovery
- i915/xe driver display probe/remove/suspend/resume/shutdown cleanup
and unification
- i915/xe display runtime PM unified
- Break i915 and xe panic dependency on struct intel_framebuffer
- Streamline Pre/Post-CSC LUT loops
- drop TGL DC3DO support
- CDCLK santization
- fix HDMI scrambling enable
- fix phys bo pread/pwrite with offset
- add missing nospec on parallel submit slot
- fix some NULL derefs
xe:
- drop force_execlist module param
- gate observation streams with perf_allow_cpu
- skip FORCE_WC and vm_bound check for external dma-bufs
- dmemcg eviction support
- remove unused NVL-S GuC
- TLB invalidation improvements
- NVL-S updated PCI-IDs and w/a
- madvise: optimise invalidation path
- fix infinite gt-reset loop in timeout recovery
- update TTM device benefical_order
- wait on external BO kernel fences in exec ioctl
- add/use more KLV helpers
- sriov: disable display in admin only PF mode
- add RAS GPU health indicator
- optimise TTM populate for DONTNEED BO
- drop force_probe for NVL-s
- add debugfs for pcode info
amdxdna:
- disable device buffer export
nova:
- build nova-core/nova-drm from drivers/gpu
- export nova-core rust symbols (workaround)
- GSP boot process consolidation
- Boot GSP with vGPU enabled
- TLV firmware image format support
- Hopper/Blackwell fixes and cleanups
- I/O projection adoption
tyr:
- firmware loading and MCU boot
- add generic slot manager + MMU
- GPU VM support ARM64 LPAE page tables
- add kernel buffer object for internal allocations
- add parser for Mali CSF
- add MCU booting
nouveau:
- race fixes
- check instmem iomapping at first use
- add dmemcg support
- expose NVDEC channels
- add scanline position/head state support for GSP
qxl:
- convert simple encoder to regular
ethosu:
- add perf counter support
etnaviv:
- force flush on power register ops
msm:
- support DSC configuration with slice_per_pkt > 1
mxsfb:
- fix disable sequence
panthor:
- support sparse mappings
rockchip:
- switch away from simple helpers
- support YUV background color
- fix layer config timeout
- add edp support for rk3576
- add batch command submission function
rocket:
- error handling and NULL ptr deref fixes
sun4i:
- switch away from simple helpers
imagination:
- mark BXM-4-64 MC1 as support
host1x:
- support tegra264
tegra:
- add DSI for tegra 20/30
v3d:
- reduce PM runtime autosuspend delay
- scheduler fixes and refactoring
- deprecate v3d 3.3 and 4.1
- validate CPU job query boundaries
hibmc:
- improve plane format handling
- switch to gem shmem
mediatek:
- cec: correct compat for mt7623-8167?
exynos:
- remove simple dependency
- add error handling to encoder paths
- take i2c adapter module reference"
* tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernel: (2074 commits)
drm/xe/mcr: Take vcs1/vecs1 into account for first media slice
drm/xe: Fix a bug in pc_adjust_freq_bounds()
drm/xe: Fix xe_device_probe() failure
drm/xe/drm_ras: Move has_drm_ras check to drm_ras layer
drm/xe/ras: Fix boot-time ras error processing
drm/amd/display: make DC_RUN_WITH_PREEMPTION_ENABLED misuse a build error
drm/amd/pm: silence uninitialized variable warnings
drm/amdgpu: skip BOs being torn down during GTT recovery
drm/amdgpu: Reject UVD message with invalid number of h265 refs
drm/amdgpu: keep PRT mappings off the vm_bo state lists
drm/amdgpu: fix nbif 6.3.1 l1 low power not functional
drm/amd/display: fix BT.2020 YCbCr output CSC matrices for DCE
drm/amd/display: fix BT.2020 YCbCr limited output CSC matrix
drm/amdgpu: Implement insert_end for VCE 3
drm/amdgpu: Fix UVD min buffer sizes
drm/amdgpu: Fix UVD decode image min size calculation
drm/amdgpu: Fix UVD dpb min size calculation for H264
drm/amdgpu: Reject UVD message with dimensions above 4096
drm/amdgpu: check ASPM on the dGPU host link
drm/radeon: fix autosuspend cleanup during teardown
...
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Add irq_type() on IrqVectorRegistration and IrqVector, wrapping the new
pci_irq_type() C function. A driver whose interrupt acknowledgment
depends on the type (MSI-X vs MSI vs INTx) queries it here rather than
assuming which type the PCI core selected.
Tested-by: John Hubbard <jhubbard@nvidia.com>
Suggested-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/all/20260808031120.363869-4-jhubbard@nvidia.com/
Reviewed-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260813165234.620555-6-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Expose pci_sriov_get_totalvfs() to Rust PCI drivers so they can query
how many SR-IOV VFs a device supports.
Use a conditional C helper because the !CONFIG_PCI_IOV version of
pci_sriov_get_totalvfs() is a static inline function and is therefore
not emitted into the Rust bindings. Return Option<NonZero<u16>> so Rust
callers must handle the zero value that represents unavailable SR-IOV.
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Gary Guo <gary@garyguo.net>
Cc: linux-pci@vger.kernel.org
Link: https://lore.kernel.org/all/DJHPRE4TGGT8.BUTMYOF5YE05@nvidia.com/
Signed-off-by: Zhi Wang <zhiw@nvidia.com>
Link: https://patch.msgid.link/20260722073913.1807677-3-zhiw@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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This is needed to inline these helpers into Rust code.
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://patch.msgid.link/20251202-define-rust-helper-v1-26-a2e13cbc17a6@google.com
[ Consider latest helper additions. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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When CONFIG_PCI_MSI is disabled pci_alloc_irq_vectors() and
pci_free_irq_vectors() are defined as inline functions and hence require
a Rust helper.
error[E0425]: cannot find function `pci_alloc_irq_vectors` in crate `bindings`
--> rust/kernel/pci/irq.rs:144:23
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144 | ...s::pci_alloc_irq_vectors(dev.as_raw(), min_vecs, max_vecs, irq_types.as_raw())
| ^^^^^^^^^^^^^^^^^^^^^ help: a function with a similar name exists: `pci_irq_vector`
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::: .../rust/bindings/bindings_helpers_generated.rs:1197:5
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1197 | pub fn pci_irq_vector(pdev: *mut pci_dev, nvec: ffi::c_uint) -> ffi::c_int;
| --------------------------------------------------------------------------- similarly named function `pci_irq_vector` defined here
error[E0425]: cannot find function `pci_free_irq_vectors` in crate `bindings`
--> rust/kernel/pci/irq.rs:170:28
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170 | unsafe { bindings::pci_free_irq_vectors(self.dev.as_raw()) };
| ^^^^^^^^^^^^^^^^^^^^ help: a function with a similar name exists: `pci_irq_vector`
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::: .../rust/bindings/bindings_helpers_generated.rs:1197:5
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1197 | pub fn pci_irq_vector(pdev: *mut pci_dev, nvec: ffi::c_uint) -> ffi::c_int;
| --------------------------------------------------------------------------- similarly named function `pci_irq_vector` defined here
error: aborting due to 2 previous errors
Fix this by adding the corresponding helpers.
Fixes: 340ccc973544 ("rust: pci: Allocate and manage PCI interrupt vectors")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512012238.YgVvRRUx-lkp@intel.com/
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Link: https://patch.msgid.link/20251202210501.40998-1-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Add bindings to obtain a PCI device's resource start address, bus/
device function, revision ID and subsystem device and vendor IDs.
These will be used by the nova-core GPU driver which is currently in
development.
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Krzysztof Wilczyński <kwilczynski@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Gary Guo <gary@garyguo.net>
Cc: Björn Roy Baron <bjorn3_gh@protonmail.com>
Cc: Benno Lossin <lossin@kernel.org>
Cc: Andreas Hindborg <a.hindborg@kernel.org>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Trevor Gross <tmgross@umich.edu>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Cc: linux-pci@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Link: https://lore.kernel.org/r/20250730013417.640593-2-apopple@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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These accessors can be used to retrieve a irq::Registration or a
irq::ThreadedRegistration from a pci device. Alternatively, drivers can
retrieve an IrqRequest from a bound PCI device for later use.
These accessors ensure that only valid IRQ lines can ever be registered.
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Tested-by: Joel Fernandes <joelagnelf@nvidia.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Link: https://lore.kernel.org/r/20250811-topics-tyr-request_irq2-v9-6-0485dcd9bcbf@collabora.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Take advantage of the generic drvdata accessors of the generic Device
type.
While at it, use from_result() instead of match.
Link: https://lore.kernel.org/r/20250621195118.124245-5-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Implement TryFrom<&device::Device> for &Device.
This allows us to get a &pci::Device from a generic &Device in a safe
way; the conversion fails if the device' bus type does not match with
the PCI bus type.
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Link: https://lore.kernel.org/r/20250321214826.140946-3-dakr@kernel.org
[ Support device context types, use dev_is_pci() helper. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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Implement the basic PCI abstractions required to write a basic PCI
driver. This includes the following data structures:
The `pci::Driver` trait represents the interface to the driver and
provides `pci::Driver::probe` for the driver to implement.
The `pci::Device` abstraction represents a `struct pci_dev` and provides
abstractions for common functions, such as `pci::Device::set_master`.
In order to provide the PCI specific parts to a generic
`driver::Registration` the `driver::RegistrationOps` trait is implemented
by `pci::Adapter`.
`pci::DeviceId` implements PCI device IDs based on the generic
`device_id::RawDevceId` abstraction.
Co-developed-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Link: https://lore.kernel.org/r/20241219170425.12036-10-dakr@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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