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|
// SPDX-License-Identifier: GPL-2.0
use kernel::{
device, devres::Devres, error::code::*, firmware, fmt, pci, prelude::*, str::CString,
};
use crate::driver::Bar0;
use crate::regs;
use crate::util;
use core::fmt;
macro_rules! define_chipset {
({ $($variant:ident = $value:expr),* $(,)* }) =>
{
/// Enum representation of the GPU chipset.
#[derive(fmt::Debug)]
pub(crate) enum Chipset {
$($variant = $value),*,
}
impl Chipset {
pub(crate) const ALL: &'static [Chipset] = &[
$( Chipset::$variant, )*
];
pub(crate) const NAMES: [&'static str; Self::ALL.len()] = [
$( util::const_bytes_to_str(
util::to_lowercase_bytes::<{ stringify!($variant).len() }>(
stringify!($variant)
).as_slice()
), )*
];
}
// TODO replace with something like derive(FromPrimitive)
impl TryFrom<u32> for Chipset {
type Error = kernel::error::Error;
fn try_from(value: u32) -> Result<Self, Self::Error> {
match value {
$( $value => Ok(Chipset::$variant), )*
_ => Err(ENODEV),
}
}
}
}
}
define_chipset!({
// Turing
TU102 = 0x162,
TU104 = 0x164,
TU106 = 0x166,
TU117 = 0x167,
TU116 = 0x168,
// Ampere
GA102 = 0x172,
GA103 = 0x173,
GA104 = 0x174,
GA106 = 0x176,
GA107 = 0x177,
// Ada
AD102 = 0x192,
AD103 = 0x193,
AD104 = 0x194,
AD106 = 0x196,
AD107 = 0x197,
});
impl Chipset {
pub(crate) fn arch(&self) -> Architecture {
match self {
Self::TU102 | Self::TU104 | Self::TU106 | Self::TU117 | Self::TU116 => {
Architecture::Turing
}
Self::GA102 | Self::GA103 | Self::GA104 | Self::GA106 | Self::GA107 => {
Architecture::Ampere
}
Self::AD102 | Self::AD103 | Self::AD104 | Self::AD106 | Self::AD107 => {
Architecture::Ada
}
}
}
}
// TODO
//
// The resulting strings are used to generate firmware paths, hence the
// generated strings have to be stable.
//
// Hence, replace with something like strum_macros derive(Display).
//
// For now, redirect to fmt::Debug for convenience.
impl fmt::Display for Chipset {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{:?}", self)
}
}
/// Enum representation of the GPU generation.
#[derive(fmt::Debug)]
pub(crate) enum Architecture {
Turing,
Ampere,
Ada,
}
pub(crate) struct Revision {
major: u8,
minor: u8,
}
impl Revision {
fn from_boot0(boot0: regs::Boot0) -> Self {
Self {
major: boot0.major_rev(),
minor: boot0.minor_rev(),
}
}
}
impl fmt::Display for Revision {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{:x}.{:x}", self.major, self.minor)
}
}
/// Structure holding the metadata of the GPU.
pub(crate) struct Spec {
chipset: Chipset,
/// The revision of the chipset.
revision: Revision,
}
impl Spec {
fn new(bar: &Devres<Bar0>) -> Result<Spec> {
let bar = bar.try_access().ok_or(ENXIO)?;
let boot0 = regs::Boot0::read(&bar);
Ok(Self {
chipset: boot0.chipset().try_into()?,
revision: Revision::from_boot0(boot0),
})
}
}
/// Structure encapsulating the firmware blobs required for the GPU to operate.
#[expect(dead_code)]
pub(crate) struct Firmware {
booter_load: firmware::Firmware,
booter_unload: firmware::Firmware,
bootloader: firmware::Firmware,
gsp: firmware::Firmware,
}
impl Firmware {
fn new(dev: &device::Device, spec: &Spec, ver: &str) -> Result<Firmware> {
let mut chip_name = CString::try_from_fmt(fmt!("{}", spec.chipset))?;
chip_name.make_ascii_lowercase();
let request = |name_| {
CString::try_from_fmt(fmt!("nvidia/{}/gsp/{}-{}.bin", &*chip_name, name_, ver))
.and_then(|path| firmware::Firmware::request(&path, dev))
};
Ok(Firmware {
booter_load: request("booter_load")?,
booter_unload: request("booter_unload")?,
bootloader: request("bootloader")?,
gsp: request("gsp")?,
})
}
}
/// Structure holding the resources required to operate the GPU.
#[pin_data]
pub(crate) struct Gpu {
spec: Spec,
/// MMIO mapping of PCI BAR 0
bar: Devres<Bar0>,
fw: Firmware,
}
impl Gpu {
pub(crate) fn new(pdev: &pci::Device, bar: Devres<Bar0>) -> Result<impl PinInit<Self>> {
let spec = Spec::new(&bar)?;
let fw = Firmware::new(pdev.as_ref(), &spec, "535.113.01")?;
dev_info!(
pdev.as_ref(),
"NVIDIA (Chipset: {}, Architecture: {:?}, Revision: {})\n",
spec.chipset,
spec.chipset.arch(),
spec.revision
);
Ok(pin_init!(Self { spec, bar, fw }))
}
}
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