From patchwork Wed Oct 4 03:13:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matt Johnston X-Patchwork-Id: 730918 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 A9FDEA57; Wed, 4 Oct 2023 03:13:29 +0000 (UTC) Received: from codeconstruct.com.au (pi.codeconstruct.com.au [203.29.241.158]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B8483A6; Tue, 3 Oct 2023 20:13:25 -0700 (PDT) Received: by codeconstruct.com.au (Postfix, from userid 10001) id 1C94A2009E; Wed, 4 Oct 2023 11:13:23 +0800 (AWST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codeconstruct.com.au; s=2022a; t=1696389203; bh=ny0tqbgMnonpXUjor//ALDMSkh1FdO54mddDOeMRe10=; h=From:To:Cc:Subject:Date; b=L56utQZZTWzVoOwGF4aENga3q85J7njOlCpyhvmMsSyH+Ev5DWpzX3D2G4tSoFBDs n6dPm3+1e4y75U+jubsIzH0IJrBUi2JgufZjFonDtG+cBIA8tFJfj9pJnuZXgcXOG5 zsMEXUUg3WBFI/CE1D8GtTRjHXMseWS2JGgB0oun5QizHmkOBNGSOci2pefBD05/z+ /WQien5wf2uCb3PPBvXKE/KDKcEDH3/uIQcU9+aIBtjHfvXiLmrblOo/XqOrAcAsuE ws+OyF88shIUoA7Wz81+qVBgE5hpi6i+8e2WIyC9/hDfju0lLwywaNlGHO1RegAdgJ LZOGyFyx89Sdw== From: Matt Johnston To: linux-i3c@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet , Jeremy Kerr , Alexandre Belloni , Rob Herring , Krzysztof Kozlowski , Conor Dooley Subject: [PATCH net-next v4 0/3] I3C MCTP net driver Date: Wed, 4 Oct 2023 11:13:13 +0800 Message-Id: <20231004031316.725107-1-matt@codeconstruct.com.au> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_PASS,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net This series adds an I3C transport for the kernel's MCTP network protocol. MCTP is a communication protocol between system components (BMCs, drives, NICs etc), with higher level protocols such as NVMe-MI or PLDM built on top of it (in userspace). It runs over various transports such as I2C, PCIe, or I3C. The mctp-i3c driver follows a similar approach to the kernel's existing mctp-i2c driver, creating a "mctpi3cX" network interface for each numbered I3C bus. Busses opt in to support by adding a "mctp-controller" property to the devicetree: &i3c0 { mctp-controller; } The driver will bind to MCTP class devices (DCR 0xCC) that are on a supported I3C bus. Each bus is represented by a `struct mctp_i3c_bus` that keeps state for the network device. An individual I3C device (struct mctp_i3c_device) performs operations using the "parent" mctp_i3c_bus object. The I3C notify/enumeration patch is needed so that the mctp-i3c driver can handle creating/removing mctp_i3c_bus objects as required. The mctp-i3c driver is using the Provisioned ID as an identifier for target I3C devices (the neighbour address), as that will be more stable than the I3C dynamic address. The driver internally translates that to a dynamic address for bus operations. The driver has been tested using an AST2600 platform. A remote endpoint has been tested against QEMU, as well as using the target mode support in Aspeed's vendor tree. I3C maintainers have acked merging this through net-next tree. Thanks, Matt --- v4: - Add asm/unaligned.h include v3: - Use get_unaligned_be48() - Use kthread_run() - Don't set net namespace v2: - Rebased to net-next - Removed unnecessary pr_ printing - Fixed reverse christmas tree ordering - Reworded DT property description to match I2C Jeremy Kerr (1): i3c: Add support for bus enumeration & notification Matt Johnston (2): dt-bindings: i3c: Add mctp-controller property mctp i3c: MCTP I3C driver .../devicetree/bindings/i3c/i3c.yaml | 6 + drivers/i3c/master.c | 35 + drivers/net/mctp/Kconfig | 9 + drivers/net/mctp/Makefile | 1 + drivers/net/mctp/mctp-i3c.c | 761 ++++++++++++++++++ include/linux/i3c/master.h | 11 + 6 files changed, 823 insertions(+) create mode 100644 drivers/net/mctp/mctp-i3c.c