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 8DAF87A13A; Fri, 26 Sep 2025 20:01:01 +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=1758916861; cv=none; b=dRnnmLnCJczRKBA8asU5y5W8dEqPUwPY6hFLFQMgDZ/Ey+pN2HrLFEiWDQ9vNgnBwkYq/DvvZOheLmALnYk/PDedu4TZc014t/kcdQNqkUKVAJcZuUIQ+sojtalqfIU9wPRsaMeIzmusShUlsW7Uj6x1DJ+N7KHVo3pUtJqcb/I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758916861; c=relaxed/simple; bh=LmM6ig4MOGV4lcn/w+S1PNw5phmfSGuH7K+di1MOKA4=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=nIEusxCUddRnp8WlB6czEz5/aJioz0vZpnK1fYP7oIUcKIocG80Rd+/ESxEd0XKRqYQjocCZS/nPku/miSqHdTumMK7BgW0M1xTHTqll77tSLbWDJsbcooeAR+dsc1ySgTrbfmrfFNTI7ax6C2me7ZpWew2K5Dt4uGiGouxuaRc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NjaLfnbx; 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="NjaLfnbx" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F7C1C4CEF4; Fri, 26 Sep 2025 20:01:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758916861; bh=LmM6ig4MOGV4lcn/w+S1PNw5phmfSGuH7K+di1MOKA4=; h=From:Subject:Date:To:Cc:From; b=NjaLfnbxgmQJvJztY7ncapArMYJ4hE3ilw/Tyb8w5GWm6Hc5YOHpUhta0+q1QNEtj qcgpq3pyyGAYEEaW3wIjFTCK35m01Qfsrtm6wojA/RR11tSnL6kHuzeEiCqnEHWJfs RKd/Ybcty7YZl4sZtkoImdQ6cvXNms+tKhILliQW6yaUL+oKuxuiqBohOPzom9voxQ JLe5hqqDkqkGgzK/CzzDHUAxGREQHAgr9RmfSfdqetmiRYW9nrvBvLKEey0a0T0pAZ 6NHOAmlm+1TAHEZIwzaX/JYjjOpJrUM5uvpB6wTYhOQWSVa+l771jPeIzbCigdjvQ2 NYNFa7sq6+5tA== From: "Rob Herring (Arm)" Subject: [PATCH v3 0/2] accel: Add Arm Ethos-U NPU Date: Fri, 26 Sep 2025 15:00:47 -0500 Message-Id: <20250926-ethos-v3-0-6bd24373e4f5@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=H4sIAO/w1mgC/1WMQQrCMBBFr1JmbSQzJWpceQ9xkaaTNiiNJCUop Xc3LRVx+T7/vQkSR88JztUEkbNPPgwF6l0FtjdDx8K3hYEkKXlEJXjsQxK1a9taszs41FC+z8j Ov9bO9Va492kM8b1mMy7rViDaChmFFNaiVUbapnHN5c5x4Mc+xA6WRKafdkL8alQ0Q6idVWS0+ tfmef4A8IKvg9IAAAA= 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 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 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-v3 Signed-off-by: Rob Herring (Arm) --- 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 | 187 ++++++ drivers/accel/ethosu/ethosu_drv.c | 430 +++++++++++++ drivers/accel/ethosu/ethosu_drv.h | 15 + drivers/accel/ethosu/ethosu_gem.c | 709 +++++++++++++++++++++ drivers/accel/ethosu/ethosu_gem.h | 46 ++ drivers/accel/ethosu/ethosu_job.c | 543 ++++++++++++++++ drivers/accel/ethosu/ethosu_job.h | 41 ++ include/uapi/drm/ethosu_accel.h | 262 ++++++++ 14 files changed, 2337 insertions(+) --- base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 change-id: 20250715-ethos-3fdd39ef6f19 Best regards, -- Rob Herring (Arm)