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.

Dependency Surface

Detected Declarations

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

Implementation Notes