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gpu: nova-core: return FSP response buffer to caller

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Change send_sync_fsp() to return the raw response buffer after
validating the common MCTP/NVDM headers and error code. This allows
callers to perform protocol-specific parsing on the response payload,
which is needed for the upcoming PRC protocol support.

For the existing COT caller, the response buffer is unused.

Signed-off-by: Zhi Wang <zhiw@nvidia.com>
Link: https://patch.msgid.link/20260604114339.1565660-4-zhiw@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
This commit is contained in:
Zhi Wang 2026-06-04 14:43:33 +03:00 committed by Alexandre Courbot
parent 56006044df
commit 31522a902f
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/nova-core/fsp.rs
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@ -257,7 +257,8 @@ pub(crate) fn wait_secure_boot(
}
/// Sends a message to FSP and waits for the response.
fn send_sync_fsp<M>(&mut self, dev: &device::Device, bar: Bar0<'_>, msg: &M) -> Result
/// Returns the full response buffer on success.
fn send_sync_fsp<M>(&mut self, dev: &device::Device, bar: Bar0<'_>, msg: &M) -> Result<KVec<u8>>
where
M: MessageToFsp,
{
@ -315,7 +316,7 @@ fn send_sync_fsp<M>(&mut self, dev: &device::Device, bar: Bar0<'_>, msg: &M) ->
return Err(EIO);
}
Ok(())
Ok(response_buf)
}
/// Boots GSP FMC via FSP Chain of Trust.
@ -336,7 +337,7 @@ pub(crate) fn boot_fmc(
GFP_KERNEL,
)?;
self.send_sync_fsp(dev, bar, &*msg)?;
let _response_buf = self.send_sync_fsp(dev, bar, &*msg)?;
dev_dbg!(dev, "FSP Chain of Trust completed successfully\n");
Ok(())