From patchwork Tue Sep 21 21:39:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Emmanuel Gil Peyrot X-Patchwork-Id: 1530932 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4HDZlG3MQlz9sSn for ; Wed, 22 Sep 2021 07:47:06 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4HDZlG2DjZz3dWR for ; Wed, 22 Sep 2021 07:47:06 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linkmauve.fr (client-ip=2a01:e0a:828:c7c0:49:5ff:fe41:d261; helo=luna.linkmauve.fr; envelope-from=linkmauve@linkmauve.fr; receiver=) Received: from luna.linkmauve.fr (unknown [IPv6:2a01:e0a:828:c7c0:49:5ff:fe41:d261]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4HDZZz0NHxz3cBH for ; Wed, 22 Sep 2021 07:39:50 +1000 (AEST) Received: by luna.linkmauve.fr (Postfix, from userid 1000) id 88C64F40B68; Tue, 21 Sep 2021 23:39:43 +0200 (CEST) From: Emmanuel Gil Peyrot To: linux-crypto@vger.kernel.org Subject: [PATCH 0/4] crypto: nintendo-aes - add a new AES driver Date: Tue, 21 Sep 2021 23:39:26 +0200 Message-Id: <20210921213930.10366-1-linkmauve@linkmauve.fr> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Herbert Xu , Emmanuel Gil Peyrot , linux-kernel@vger.kernel.org, Rob Herring , Paul Mackerras , Ash Logan , linuxppc-dev@lists.ozlabs.org, "David S. Miller" , =?utf-8?q?Jonathan_Neusch=C3=A4fer?= Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This engine implements AES in CBC mode, using 128-bit keys only. It is present on both the Wii and the Wii U, and is apparently identical in both consoles. The hardware is capable of firing an interrupt when the operation is done, but this driver currently uses a busy loop, I’m not too sure whether it would be preferable to switch, nor how to achieve that. It also supports a mode where no operation is done, and thus could be used as a DMA copy engine, but I don’t know how to expose that to the kernel or whether it would even be useful. In my testing, on a Wii U, this driver reaches 80.7 MiB/s, while the aes-generic driver only reaches 30.9 MiB/s, so it is a quite welcome speedup. This driver was written based on reversed documentation, see: https://wiibrew.org/wiki/Hardware/AES Emmanuel Gil Peyrot (4): crypto: nintendo-aes - add a new AES driver dt-bindings: nintendo-aes: Document the Wii and Wii U AES support powerpc: wii.dts: Expose the AES engine on this platform powerpc: wii_defconfig: Enable AES by default .../bindings/crypto/nintendo-aes.yaml | 34 +++ arch/powerpc/boot/dts/wii.dts | 7 + arch/powerpc/configs/wii_defconfig | 4 +- drivers/crypto/Kconfig | 11 + drivers/crypto/Makefile | 1 + drivers/crypto/nintendo-aes.c | 273 ++++++++++++++++++ 6 files changed, 329 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/crypto/nintendo-aes.yaml create mode 100644 drivers/crypto/nintendo-aes.c