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gpu: nova-core: Simplify DmaObject::from_data in nova-core/dma.rs

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This patch solves one of the existing mentions of COHA, a task
in the Nova task list about improving the `CoherentAllocation` API.
It uses the `write` method from `CoherentAllocation`.

Signed-off-by: Daniel del Castillo <delcastillodelarosadaniel@gmail.com>
[acourbot@nvidia.com: set prefix to "gpu: nova-core:".]
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Message-ID: <20251104193756.57726-3-delcastillodelarosadaniel@gmail.com>
This commit is contained in:
Daniel del Castillo
2025-11-04 20:37:50 +01:00
committed by Alexandre Courbot
parent 571ce401a7
commit 3577e265e4
1 changed files with 5 additions and 14 deletions
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19
drivers/gpu/nova-core/dma.rs
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@@ -30,20 +30,11 @@ impl DmaObject {
}
pub(crate) fn from_data(dev: &device::Device<device::Bound>, data: &[u8]) -> Result<Self> {
Self::new(dev, data.len()).map(|mut dma_obj| {
// TODO[COHA]: replace with `CoherentAllocation::write()` once available.
// SAFETY:
// - `dma_obj`'s size is at least `data.len()`.
// - We have just created this object and there is no other user at this stage.
unsafe {
core::ptr::copy_nonoverlapping(
data.as_ptr(),
dma_obj.dma.start_ptr_mut(),
data.len(),
);
}
dma_obj
Self::new(dev, data.len()).and_then(|mut dma_obj| {
// SAFETY: We have just allocated the DMA memory, we are the only users and
// we haven't made the device aware of the handle yet.
unsafe { dma_obj.write(data, 0)? }
Ok(dma_obj)
})
}
}