|
| 1 | +// SPDX-License-Identifier: GPL-2.0 |
| 2 | + |
| 3 | +use kernel::{ |
| 4 | + device, devres::Devres, error::code::*, firmware, fmt, pci, prelude::*, str::CString, |
| 5 | +}; |
| 6 | + |
| 7 | +use crate::driver::Bar0; |
| 8 | +use crate::regs; |
| 9 | +use crate::util; |
| 10 | +use core::fmt; |
| 11 | + |
| 12 | +macro_rules! define_chipset { |
| 13 | + ({ $($variant:ident = $value:expr),* $(,)* }) => |
| 14 | + { |
| 15 | + /// Enum representation of the GPU chipset. |
| 16 | + #[derive(fmt::Debug)] |
| 17 | + pub(crate) enum Chipset { |
| 18 | + $($variant = $value),*, |
| 19 | + } |
| 20 | + |
| 21 | + impl Chipset { |
| 22 | + pub(crate) const ALL: &'static [Chipset] = &[ |
| 23 | + $( Chipset::$variant, )* |
| 24 | + ]; |
| 25 | + |
| 26 | + pub(crate) const NAMES: [&'static str; Self::ALL.len()] = [ |
| 27 | + $( util::const_bytes_to_str( |
| 28 | + util::to_lowercase_bytes::<{ stringify!($variant).len() }>( |
| 29 | + stringify!($variant) |
| 30 | + ).as_slice() |
| 31 | + ), )* |
| 32 | + ]; |
| 33 | + } |
| 34 | + |
| 35 | + // TODO replace with something like derive(FromPrimitive) |
| 36 | + impl TryFrom<u32> for Chipset { |
| 37 | + type Error = kernel::error::Error; |
| 38 | + |
| 39 | + fn try_from(value: u32) -> Result<Self, Self::Error> { |
| 40 | + match value { |
| 41 | + $( $value => Ok(Chipset::$variant), )* |
| 42 | + _ => Err(ENODEV), |
| 43 | + } |
| 44 | + } |
| 45 | + } |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +define_chipset!({ |
| 50 | + // Turing |
| 51 | + TU102 = 0x162, |
| 52 | + TU104 = 0x164, |
| 53 | + TU106 = 0x166, |
| 54 | + TU117 = 0x167, |
| 55 | + TU116 = 0x168, |
| 56 | + // Ampere |
| 57 | + GA102 = 0x172, |
| 58 | + GA103 = 0x173, |
| 59 | + GA104 = 0x174, |
| 60 | + GA106 = 0x176, |
| 61 | + GA107 = 0x177, |
| 62 | + // Ada |
| 63 | + AD102 = 0x192, |
| 64 | + AD103 = 0x193, |
| 65 | + AD104 = 0x194, |
| 66 | + AD106 = 0x196, |
| 67 | + AD107 = 0x197, |
| 68 | +}); |
| 69 | + |
| 70 | +impl Chipset { |
| 71 | + pub(crate) fn arch(&self) -> Architecture { |
| 72 | + match self { |
| 73 | + Self::TU102 | Self::TU104 | Self::TU106 | Self::TU117 | Self::TU116 => { |
| 74 | + Architecture::Turing |
| 75 | + } |
| 76 | + Self::GA102 | Self::GA103 | Self::GA104 | Self::GA106 | Self::GA107 => { |
| 77 | + Architecture::Ampere |
| 78 | + } |
| 79 | + Self::AD102 | Self::AD103 | Self::AD104 | Self::AD106 | Self::AD107 => { |
| 80 | + Architecture::Ada |
| 81 | + } |
| 82 | + } |
| 83 | + } |
| 84 | +} |
| 85 | + |
| 86 | +// TODO |
| 87 | +// |
| 88 | +// The resulting strings are used to generate firmware paths, hence the |
| 89 | +// generated strings have to be stable. |
| 90 | +// |
| 91 | +// Hence, replace with something like strum_macros derive(Display). |
| 92 | +// |
| 93 | +// For now, redirect to fmt::Debug for convenience. |
| 94 | +impl fmt::Display for Chipset { |
| 95 | + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| 96 | + write!(f, "{:?}", self) |
| 97 | + } |
| 98 | +} |
| 99 | + |
| 100 | +/// Enum representation of the GPU generation. |
| 101 | +#[derive(fmt::Debug)] |
| 102 | +pub(crate) enum Architecture { |
| 103 | + Turing, |
| 104 | + Ampere, |
| 105 | + Ada, |
| 106 | +} |
| 107 | + |
| 108 | +pub(crate) struct Revision { |
| 109 | + major: u8, |
| 110 | + minor: u8, |
| 111 | +} |
| 112 | + |
| 113 | +impl Revision { |
| 114 | + fn from_boot0(boot0: regs::Boot0) -> Self { |
| 115 | + Self { |
| 116 | + major: boot0.major_rev(), |
| 117 | + minor: boot0.minor_rev(), |
| 118 | + } |
| 119 | + } |
| 120 | +} |
| 121 | + |
| 122 | +impl fmt::Display for Revision { |
| 123 | + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| 124 | + write!(f, "{:x}.{:x}", self.major, self.minor) |
| 125 | + } |
| 126 | +} |
| 127 | + |
| 128 | +/// Structure holding the metadata of the GPU. |
| 129 | +pub(crate) struct Spec { |
| 130 | + chipset: Chipset, |
| 131 | + /// The revision of the chipset. |
| 132 | + revision: Revision, |
| 133 | +} |
| 134 | + |
| 135 | +impl Spec { |
| 136 | + fn new(bar: &Devres<Bar0>) -> Result<Spec> { |
| 137 | + let bar = bar.try_access().ok_or(ENXIO)?; |
| 138 | + let boot0 = regs::Boot0::read(&bar); |
| 139 | + |
| 140 | + Ok(Self { |
| 141 | + chipset: boot0.chipset().try_into()?, |
| 142 | + revision: Revision::from_boot0(boot0), |
| 143 | + }) |
| 144 | + } |
| 145 | +} |
| 146 | + |
| 147 | +/// Structure encapsulating the firmware blobs required for the GPU to operate. |
| 148 | +#[expect(dead_code)] |
| 149 | +pub(crate) struct Firmware { |
| 150 | + booter_load: firmware::Firmware, |
| 151 | + booter_unload: firmware::Firmware, |
| 152 | + bootloader: firmware::Firmware, |
| 153 | + gsp: firmware::Firmware, |
| 154 | +} |
| 155 | + |
| 156 | +impl Firmware { |
| 157 | + fn new(dev: &device::Device, spec: &Spec, ver: &str) -> Result<Firmware> { |
| 158 | + let mut chip_name = CString::try_from_fmt(fmt!("{}", spec.chipset))?; |
| 159 | + chip_name.make_ascii_lowercase(); |
| 160 | + |
| 161 | + let request = |name_| { |
| 162 | + CString::try_from_fmt(fmt!("nvidia/{}/gsp/{}-{}.bin", &*chip_name, name_, ver)) |
| 163 | + .and_then(|path| firmware::Firmware::request(&path, dev)) |
| 164 | + }; |
| 165 | + |
| 166 | + Ok(Firmware { |
| 167 | + booter_load: request("booter_load")?, |
| 168 | + booter_unload: request("booter_unload")?, |
| 169 | + bootloader: request("bootloader")?, |
| 170 | + gsp: request("gsp")?, |
| 171 | + }) |
| 172 | + } |
| 173 | +} |
| 174 | + |
| 175 | +/// Structure holding the resources required to operate the GPU. |
| 176 | +#[pin_data] |
| 177 | +pub(crate) struct Gpu { |
| 178 | + spec: Spec, |
| 179 | + /// MMIO mapping of PCI BAR 0 |
| 180 | + bar: Devres<Bar0>, |
| 181 | + fw: Firmware, |
| 182 | +} |
| 183 | + |
| 184 | +impl Gpu { |
| 185 | + pub(crate) fn new(pdev: &pci::Device, bar: Devres<Bar0>) -> Result<impl PinInit<Self>> { |
| 186 | + let spec = Spec::new(&bar)?; |
| 187 | + let fw = Firmware::new(pdev.as_ref(), &spec, "535.113.01")?; |
| 188 | + |
| 189 | + dev_info!( |
| 190 | + pdev.as_ref(), |
| 191 | + "NVIDIA (Chipset: {}, Architecture: {:?}, Revision: {})\n", |
| 192 | + spec.chipset, |
| 193 | + spec.chipset.arch(), |
| 194 | + spec.revision |
| 195 | + ); |
| 196 | + |
| 197 | + Ok(pin_init!(Self { spec, bar, fw })) |
| 198 | + } |
| 199 | +} |
0 commit comments