gpu: nova-core: gsp: add reply/no-reply info to `CommandToGsp`

Add type infrastructure to know what reply is expected from each
`CommandToGsp`. Uses a marker type `NoReply` which does not implement
`MessageFromGsp` to mark commands which don't expect a response.

Update `send_command` to wait for a reply and add `send_command_no_wait`
which sends a command that has no reply, without blocking.

This prepares for adding locking to the queue.

Tested-by: Zhi Wang <zhiw@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
Link: https://patch.msgid.link/20260318-cmdq-locking-v5-3-18b37e3f9069@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/nova-core/gsp/boot.rs b/drivers/gpu/nova-core/gsp/boot.rs
index 6db2decbc6f5..ffc478b33640 100644
--- a/drivers/gpu/nova-core/gsp/boot.rs
+++ b/drivers/gpu/nova-core/gsp/boot.rs
@@ -169,8 +169,9 @@ impl super::Gsp {
         dma_write!(wpr_meta, [0]?, GspFwWprMeta::new(&gsp_fw, &fb_layout));
 
         self.cmdq
-            .send_command(bar, commands::SetSystemInfo::new(pdev))?;
-        self.cmdq.send_command(bar, commands::SetRegistry::new())?;
+            .send_command_no_wait(bar, commands::SetSystemInfo::new(pdev))?;
+        self.cmdq
+            .send_command_no_wait(bar, commands::SetRegistry::new())?;
 
         gsp_falcon.reset(bar)?;
         let libos_handle = self.libos.dma_handle();