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69f5cd67ce
Booting the GSP on Ampere requires an intricate dance between the GSP and SEC2 falcons, where the GSP starts by running the FWSEC firmware to create the WPR2 region , and then SEC2 loads the actual RISC-V firmware into the GSP. Add the common Falcon code and HAL for Ampere GPUs, and instantiate the GSP and SEC2 Falcons that will be required to perform that dance and boot the GSP. Thanks to Ben Skeggs for pointing out an important bug in the memory scrubbing code that could lead to a race condition and ultimately a failure to boot the GSP! Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://lore.kernel.org/r/20250619-nova-frts-v6-15-ecf41ef99252@nvidia.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
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use kernel::prelude::*;
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use crate::driver::Bar0;
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use crate::falcon::{Falcon, FalconBromParams, FalconEngine};
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use crate::gpu::Chipset;
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mod ga102;
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/// Hardware Abstraction Layer for Falcon cores.
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///
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/// Implements chipset-specific low-level operations. The trait is generic against [`FalconEngine`]
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/// so its `BASE` parameter can be used in order to avoid runtime bound checks when accessing
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/// registers.
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pub(crate) trait FalconHal<E: FalconEngine>: Sync {
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/// Activates the Falcon core if the engine is a risvc/falcon dual engine.
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fn select_core(&self, _falcon: &Falcon<E>, _bar: &Bar0) -> Result {
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Ok(())
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}
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/// Returns the fused version of the signature to use in order to run a HS firmware on this
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/// falcon instance. `engine_id_mask` and `ucode_id` are obtained from the firmware header.
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fn signature_reg_fuse_version(
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&self,
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falcon: &Falcon<E>,
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bar: &Bar0,
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engine_id_mask: u16,
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ucode_id: u8,
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) -> Result<u32>;
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/// Program the boot ROM registers prior to starting a secure firmware.
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fn program_brom(&self, falcon: &Falcon<E>, bar: &Bar0, params: &FalconBromParams) -> Result;
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}
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/// Returns a boxed falcon HAL adequate for `chipset`.
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///
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/// We use a heap-allocated trait object instead of a statically defined one because the
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/// generic `FalconEngine` argument makes it difficult to define all the combinations
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/// statically.
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pub(super) fn falcon_hal<E: FalconEngine + 'static>(
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chipset: Chipset,
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) -> Result<KBox<dyn FalconHal<E>>> {
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use Chipset::*;
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let hal = match chipset {
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GA102 | GA103 | GA104 | GA106 | GA107 => {
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KBox::new(ga102::Ga102::<E>::new(), GFP_KERNEL)? as KBox<dyn FalconHal<E>>
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}
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_ => return Err(ENOTSUPP),
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};
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Ok(hal)
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}
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