drivers/gpu/nova-core/fb/hal/gb100.rs
Source file repositories/reference/linux-study-clean/drivers/gpu/nova-core/fb/hal/gb100.rs
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/nova-core/fb/hal/gb100.rs- Extension
.rs- Size
- 3368 bytes
- Lines
- 123
- Domain
- Driver Families
- Bucket
- drivers/gpu
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
struct Gb100function write_sysmem_flush_page_gb100
Annotated Snippet
fn write_sysmem_flush_page_gb100(bar: Bar0<'_>, addr: Bounded<u64, 52>) {
// CAST: lower 32 bits. Hardware ignores bits 7:0.
let addr_lo = *addr as u32;
let addr_hi = addr.shr::<32, 20>().cast::<u32>();
// Write HI first. The hardware will trigger the flush on the LO write.
// Primary HSHUB pair.
bar.write(
regs::NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_HI::of::<Gb100>(),
regs::NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_HI::zeroed().with_adr(addr_hi),
);
bar.write(
regs::NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_LO::of::<Gb100>(),
regs::NV_PFB_HSHUB_PCIE_FLUSH_SYSMEM_ADDR_LO::zeroed().with_adr(addr_lo),
);
// EG (egress) pair -- must match the primary pair.
bar.write(
regs::NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_HI::of::<Gb100>(),
regs::NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_HI::zeroed().with_adr(addr_hi),
);
bar.write(
regs::NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_LO::of::<Gb100>(),
regs::NV_PFB_HSHUB_EG_PCIE_FLUSH_SYSMEM_ADDR_LO::zeroed().with_adr(addr_lo),
);
}
pub(super) const fn pmu_reserved_size_gb100() -> u32 {
usize_into_u32::<{ const_align_up(SZ_8M + SZ_16M + SZ_4K, Alignment::new::<SZ_128K>()).unwrap() }>(
)
}
impl FbHal for Gb100 {
fn read_sysmem_flush_page(&self, bar: Bar0<'_>) -> u64 {
read_sysmem_flush_page_gb100(bar)
}
fn write_sysmem_flush_page(&self, bar: Bar0<'_>, addr: u64) -> Result {
let addr = Bounded::<u64, 52>::try_new(addr).ok_or(EINVAL)?;
write_sysmem_flush_page_gb100(bar, addr);
Ok(())
}
fn supports_display(&self, bar: Bar0<'_>) -> bool {
super::ga100::display_enabled_ga100(bar)
}
fn vidmem_size(&self, bar: Bar0<'_>) -> u64 {
super::ga102::vidmem_size_ga102(bar)
}
fn pmu_reserved_size(&self) -> u32 {
pmu_reserved_size_gb100()
}
fn non_wpr_heap_size(&self) -> u32 {
// Non-WPR heap for GB10x (see Open RM: kgspGetNonWprHeapSize, GB100/GB102).
u32::SZ_2M
}
fn frts_size(&self) -> u64 {
super::tu102::frts_size_tu102()
}
}
const GB100: Gb100 = Gb100;
pub(super) const GB100_HAL: &dyn FbHal = &GB100;
Annotation
- Detected declarations: `struct Gb100`, `function write_sysmem_flush_page_gb100`.
- Atlas domain: Driver Families / drivers/gpu.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.