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// SPDX-License-Identifier: GPL-2.0
use kernel::prelude::*;
use crate::{
driver::Bar0,
falcon::{
Falcon,
FalconBromParams,
FalconEngine, //
},
gpu::Chipset,
};
mod ga102;
mod tu102;
/// Method used to load data into falcon memory. Some GPU architectures need
/// PIO and others can use DMA.
pub(crate) enum LoadMethod {
/// Programmed I/O
Pio,
/// Direct Memory Access
Dma,
}
/// Hardware Abstraction Layer for Falcon cores.
///
/// Implements chipset-specific low-level operations. The trait is generic against [`FalconEngine`]
/// so its `BASE` parameter can be used in order to avoid runtime bound checks when accessing
/// registers.
pub(crate) trait FalconHal<E: FalconEngine>: Send + Sync {
/// Activates the Falcon core if the engine is a risvc/falcon dual engine.
fn select_core(&self, _falcon: &Falcon<E>, _bar: &Bar0) -> Result {
Ok(())
}
/// Returns the fused version of the signature to use in order to run a HS firmware on this
/// falcon instance. `engine_id_mask` and `ucode_id` are obtained from the firmware header.
fn signature_reg_fuse_version(
&self,
falcon: &Falcon<E>,
bar: &Bar0,
engine_id_mask: u16,
ucode_id: u8,
) -> Result<u32>;
/// Program the boot ROM registers prior to starting a secure firmware.
fn program_brom(&self, falcon: &Falcon<E>, bar: &Bar0, params: &FalconBromParams) -> Result;
/// Check if the RISC-V core is active.
/// Returns `true` if the RISC-V core is active, `false` otherwise.
fn is_riscv_active(&self, bar: &Bar0) -> bool;
/// Wait for memory scrubbing to complete.
fn reset_wait_mem_scrubbing(&self, bar: &Bar0) -> Result;
/// Reset the falcon engine.
fn reset_eng(&self, bar: &Bar0) -> Result;
/// returns the method needed to load data into Falcon memory
fn load_method(&self) -> LoadMethod;
}
/// Returns a boxed falcon HAL adequate for `chipset`.
///
/// We use a heap-allocated trait object instead of a statically defined one because the
/// generic `FalconEngine` argument makes it difficult to define all the combinations
/// statically.
pub(super) fn falcon_hal<E: FalconEngine + 'static>(
chipset: Chipset,
) -> Result<KBox<dyn FalconHal<E>>> {
use Chipset::*;
let hal = match chipset {
TU102 | TU104 | TU106 | TU116 | TU117 => {
KBox::new(tu102::Tu102::<E>::new(), GFP_KERNEL)? as KBox<dyn FalconHal<E>>
}
GA102 | GA103 | GA104 | GA106 | GA107 | AD102 | AD103 | AD104 | AD106 | AD107 => {
KBox::new(ga102::Ga102::<E>::new(), GFP_KERNEL)? as KBox<dyn FalconHal<E>>
}
_ => return Err(ENOTSUPP),
};
Ok(hal)
}
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