Re: [PATCH 0/5] accel/rocket: Support standalone DPU/PPU tasks and pipelined workloads

["Heiko Stübner" <heiko@sntech.de>]

Hi Ross,

Am Dienstag, 17. Februar 2026, 22:39:48 Mitteleuropäische Sommerzeit schrieb Ross Cawston:
> The Rocket NPU supports multiple workload types beyond convolutional jobs:
> - Standalone post-processing (PPU) tasks (pooling, element-wise ops, etc.)
> - Pipelined DPU→PPU workloads
> 
> The current driver has limitations preventing these from working correctly:
> - CNA/Core S_POINTER registers are always written, re-arming stale state
> - Interrupt handling is hard-coded to DPU only, causing PPU timeouts
> - Ping-pong mode is always enabled
> 
> This series fixes these while preserving backward compatibility.
> 
> Patch breakdown:
> 1/5 Fix error path in BO creation (cleanup/fix)
> 2/5 Enable ping-pong mode only for multi-task jobs (optimization)
> 3/5 Add per-task int_mask and flags to UAPI/kernel (new knobs)
> 4/5 Skip CNA/Core S_POINTER init for standalone tasks
> 5/5 Use per-task interrupt mask and handle PPU completions
> 
> Derived from vendor BSP behavior.
> 
> Tested on OrangePi 5 Ultra and Radxa Rock 5B (RK3588).
> 
> Thanks for review!

Extending Rocket's range sounds really cool.

Curious me wants to know how to test these new parts.
I was assuming some mesa thing, but didn't find a PR for it, so it
must be something else?

Thanks a lot
Heiko


> Signed-off-by: Ross Cawston <ross@r-sc.ca>
> ---
> Ross Cawston (5):
>       accel/rocket: Fix error path in BO creation
>       accel/rocket: Enable ping-pong mode only for multi-task jobs
>       accel/rocket: Add per-task flags and interrupt mask to UAPI and kernel
>       accel/rocket: Skip CNA/Core S_POINTER initialization for standalone tasks
>       accel/rocket: Use per-task interrupt mask and handle PPU completion interrupts
> 
>  drivers/accel/rocket/rocket_gem.c |  2 +
>  drivers/accel/rocket/rocket_job.c | 80 ++++++++++++++++++++++++++++++---------
>  drivers/accel/rocket/rocket_job.h |  2 +
>  include/uapi/drm/rocket_accel.h   | 25 ++++++++++++
>  4 files changed, 92 insertions(+), 17 deletions(-)
> ---
> base-commit: 17f8d2009367c3da82882f70ccbdca9f8c7b5f20
> change-id: 20260217-accel-rocket-clean-base-57c0e88651e6
> 
> Best regards,
>