On Wed, Oct 15, 2025 at 7:47 PM Rob Herring (Arm) <[email protected]> wrote: > > The Arm Ethos-U65/85 NPUs are designed for edge AI inference > applications[0]. > > The driver works with Mesa Teflon. A merge request for Ethos support is > here[1]. The UAPI should also be compatible with the downstream (open > source) driver stack[2] and Vela compiler though that has not been > implemented. > > Testing so far has been on i.MX93 boards with Ethos-U65 and a FVP model > with Ethos-U85. More work is needed in mesa for handling U85 command > stream differences, but that doesn't affect the UABI. > > A git tree is here[3]. > > Rob > > [0] https://www.arm.com/products/silicon-ip-cpu?families=ethos%20npus > [1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36699/ > [2] https://gitlab.arm.com/artificial-intelligence/ethos-u/ > [3] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git ethos-v4 > > Signed-off-by: Rob Herring (Arm) <[email protected]>
For the series: Acked-by: Tomeu Vizoso <[email protected]> Regards, Tomeu > --- > Changes in v4: > - Use bulk clk API > - Various whitespace fixes mostly due to ethos->ethosu rename > - Drop error check on dma_set_mask_and_coherent() > - Drop unnecessary pm_runtime_mark_last_busy() call > - Move variable declarations out of switch (a riscv/clang build failure) > - Use lowercase hex in all defines > - Drop unused ethosu_device.coherent member > - Add comments on all locks > - Link to v3: > https://lore.kernel.org/r/[email protected] > > Changes in v3: > - Rework and improve job submit validation > - Rename ethos to ethosu. There was an Ethos-Nxx that's unrelated. > - Add missing init for sched_lock mutex > - Drop some prints to debug level > - Fix i.MX93 SRAM accesses (AXI config) > - Add U85 AXI configuration and test on FVP with U85 > - Print the current cmd value on timeout > - Link to v2: > https://lore.kernel.org/r/[email protected] > > Changes in v2: > - Rebase on v6.17-rc1 adapting to scheduler changes > - scheduler: Drop the reset workqueue. According to the scheduler docs, > we don't need it since we have a single h/w queue. > - scheduler: Rework the timeout handling to continue running if we are > making progress. Fixes timeouts on larger jobs. > - Reset the NPU on resume so it's in a known state > - Add error handling on clk_get() calls > - Fix drm_mm splat on module unload. We were missing a put on the > cmdstream BO in the scheduler clean-up. > - Fix 0-day report needing explicit bitfield.h include > - Link to v1: > https://lore.kernel.org/r/[email protected] > > --- > Rob Herring (Arm) (2): > dt-bindings: npu: Add Arm Ethos-U65/U85 > accel: Add Arm Ethos-U NPU driver > > .../devicetree/bindings/npu/arm,ethos.yaml | 79 +++ > MAINTAINERS | 9 + > drivers/accel/Kconfig | 1 + > drivers/accel/Makefile | 1 + > drivers/accel/ethosu/Kconfig | 10 + > drivers/accel/ethosu/Makefile | 4 + > drivers/accel/ethosu/ethosu_device.h | 190 ++++++ > drivers/accel/ethosu/ethosu_drv.c | 418 ++++++++++++ > drivers/accel/ethosu/ethosu_drv.h | 15 + > drivers/accel/ethosu/ethosu_gem.c | 710 > +++++++++++++++++++++ > drivers/accel/ethosu/ethosu_gem.h | 46 ++ > drivers/accel/ethosu/ethosu_job.c | 539 ++++++++++++++++ > drivers/accel/ethosu/ethosu_job.h | 41 ++ > include/uapi/drm/ethosu_accel.h | 261 ++++++++ > 14 files changed, 2324 insertions(+) > --- > base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787 > change-id: 20250715-ethos-3fdd39ef6f19 > > Best regards, > -- > Rob Herring (Arm) <[email protected]> >
