From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 740AB1494D9; Wed, 15 Oct 2025 17:47:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760550472; cv=none; b=tlvaQC8ySbwQ3qreii/AfUL3ygVRXCu1mZ8dCPRj5Sfqlgpdn9FwwYI6+6KLuxCAGZwVcY4Iwhi+Pg0tFxaTjh1+ADfRGN+UjKUkFLgWOF7J1lJNaFpWynu6pcT6CmXC6y+gYfSYHFPQexVyCs9sFFfqYtUvuYH7w+ZUJnSbukE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760550472; c=relaxed/simple; bh=uPrrsFdE6NGU9a6DMqCtEGRYCPmpe4J9fv2Y6if0yMU=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=gq732N5gXvyw98sLNBYwNJ8gTYKokCN1CJzMxH+TW5TIEWf2BuquqMGypHHsWE+VErOBxiVPFLx5LtFQisz1IS8dCrUCQCN/+fz1Rf/2jd9KSK9FVLJuP8sLqrbw/cMZTU0w4xcGz/qL3V2zzAYRtGh+idOanglvkhEVHhW/Akw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IIgC3gVB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="IIgC3gVB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 00093C4CEF9; Wed, 15 Oct 2025 17:47:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760550472; bh=uPrrsFdE6NGU9a6DMqCtEGRYCPmpe4J9fv2Y6if0yMU=; h=From:Subject:Date:To:Cc:From; b=IIgC3gVBZ7jF+1XjKNm9sMbC3S/uB5R0Cov85iu58caIHyHKrGPWxThWs2slqRFJs 1OGiuSZdOijwychMKYVEdCjvqBBFLqb+KBIGPrNV6ZwlBj5KGZTGfl1+HFiw1TTciR JdzM9dhLznEANN8JLFT9wV9bSKB17f6gw6PXWk/vaBdpbugSZ2KNonhssxn1udz7Ur A4pvJBXEtTKSz81nWeLyEtrQwfmB+7crbmv8SrRNUrdVop8pQzuOSkreSM+Fy038+2 B+AvFMMC8dW8705pdAB6cQ4DZ4hxR3Gu+Zvvg6VQImaMoFmswoFEwa8Cd9pYNuMMqR Ls0yZizndr7Xw== From: "Rob Herring (Arm)" Subject: [PATCH v4 0/2] accel: Add Arm Ethos-U NPU Date: Wed, 15 Oct 2025 12:47:38 -0500 Message-Id: <20251015-ethos-v4-0-81025a3dcbf3@kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIADre72gC/2XMQQ6CMBCF4auYrq1hphSsK+9hXECZQqOhpiWNh nB3C4EQ4/JN5vtHFshbCuxyGJmnaIN1fRr58cB0V/UtcdukzTBDmZUgOQ2dC1yYphGKTGFAsfT 78mTse+nc7ml3NgzOf5ZshPm6FhDXQgSeca1ByyrTdW3q64N8T8+T8y2bExF3dgbYGCZWISijJ VZK/jOxM4XFxkRiRd1gLkpBuZE/bJqmL4jDJsoJAQAA X-Change-ID: 20250715-ethos-3fdd39ef6f19 To: Tomeu Vizoso , Krzysztof Kozlowski , Conor Dooley , Oded Gabbay , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Robin Murphy , Steven Price , Daniel Stone , Frank Li , Sui Jingfeng Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Krzysztof Kozlowski , Frank Li X-Mailer: b4 0.15-dev 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) --- 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/20250926-ethos-v3-0-6bd24373e4f5@kernel.org 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/20250811-ethos-v2-0-a219fc52a95b@kernel.org 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/20250722-ethos-v1-0-cc1c5a0cbbfb@kernel.org --- 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)