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gpu: nova-core: sequencer: Add delay opcode support

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Implement a sequencer opcode for delay operations.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Message-ID: <20251114195552.739371-10-joelagnelf@nvidia.com>
This commit is contained in:
Joel Fernandes
2025-11-14 14:55:48 -05:00
committed by Alexandre Courbot
parent 2367ce2e9e
commit e386680e8d
2 changed files with 18 additions and 3 deletions
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2
drivers/gpu/nova-core/gsp/fw.rs
View File

@@ -473,7 +473,6 @@ unsafe impl AsBytes for RegPollPayload {}
#[derive(Copy, Clone)]
pub(crate) struct DelayUsPayload(r570_144::GSP_SEQ_BUF_PAYLOAD_DELAY_US);
#[expect(unused)]
impl DelayUsPayload {
/// Returns the delay value in microseconds.
pub(crate) fn val(&self) -> u32 {
@@ -515,7 +514,6 @@ unsafe impl AsBytes for RegStorePayload {}
#[repr(transparent)]
pub(crate) struct SequencerBufferCmd(r570_144::GSP_SEQUENCER_BUFFER_CMD);
#[expect(unused)]
impl SequencerBufferCmd {
/// Returns the opcode as a `SeqBufOpcode` enum, or error if invalid.
pub(crate) fn opcode(&self) -> Result<SeqBufOpcode> {

19
drivers/gpu/nova-core/gsp/sequencer.rs
View File

@@ -14,7 +14,10 @@ use kernel::{
device,
io::poll::read_poll_timeout,
prelude::*,
time::Delta,
time::{
delay::fsleep,
Delta, //
},
transmute::FromBytes,
types::ARef, //
};
@@ -71,6 +74,7 @@ pub(crate) enum GspSeqCmd {
RegWrite(fw::RegWritePayload),
RegModify(fw::RegModifyPayload),
RegPoll(fw::RegPollPayload),
DelayUs(fw::DelayUsPayload),
RegStore(fw::RegStorePayload),
}
@@ -96,6 +100,11 @@ impl GspSeqCmd {
let size = opcode_size + size_of_val(&payload);
(GspSeqCmd::RegPoll(payload), size)
}
fw::SeqBufOpcode::DelayUs => {
let payload = fw_cmd.delay_us_payload()?;
let size = opcode_size + size_of_val(&payload);
(GspSeqCmd::DelayUs(payload), size)
}
fw::SeqBufOpcode::RegStore => {
let payload = fw_cmd.reg_store_payload()?;
let size = opcode_size + size_of_val(&payload);
@@ -182,6 +191,13 @@ impl GspSeqCmdRunner for fw::RegPollPayload {
}
}
impl GspSeqCmdRunner for fw::DelayUsPayload {
fn run(&self, _sequencer: &GspSequencer<'_>) -> Result {
fsleep(Delta::from_micros(i64::from(self.val())));
Ok(())
}
}
impl GspSeqCmdRunner for fw::RegStorePayload {
fn run(&self, sequencer: &GspSequencer<'_>) -> Result {
let addr = usize::from_safe_cast(self.addr());
@@ -196,6 +212,7 @@ impl GspSeqCmdRunner for GspSeqCmd {
GspSeqCmd::RegWrite(cmd) => cmd.run(seq),
GspSeqCmd::RegModify(cmd) => cmd.run(seq),
GspSeqCmd::RegPoll(cmd) => cmd.run(seq),
GspSeqCmd::DelayUs(cmd) => cmd.run(seq),
GspSeqCmd::RegStore(cmd) => cmd.run(seq),
}
}