From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD7F2C07E99 for ; Mon, 5 Jul 2021 14:50:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8528661375 for ; Mon, 5 Jul 2021 14:50:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231556AbhGEOws (ORCPT ); Mon, 5 Jul 2021 10:52:48 -0400 Received: from foss.arm.com ([217.140.110.172]:47908 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230504AbhGEOwq (ORCPT ); Mon, 5 Jul 2021 10:52:46 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3AA371FB; Mon, 5 Jul 2021 07:50:09 -0700 (PDT) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 53A5D3F694; Mon, 5 Jul 2021 07:50:05 -0700 (PDT) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com, etienne.carriere@linaro.org, vincent.guittot@linaro.org, souvik.chakravarty@arm.com, cristian.marussi@arm.com, igor.skalkin@opensynergy.com, peter.hilber@opensynergy.com, alex.bennee@linaro.org, jean-philippe@linaro.org, mikhail.golubev@opensynergy.com, anton.yakovlev@opensynergy.com, Vasyl.Vavrychuk@opensynergy.com, Andriy.Tryshnivskyy@opensynergy.com Subject: [PATCH v5 00/15] Introduce SCMI transport based on VirtIO Date: Mon, 5 Jul 2021 15:48:59 +0100 Message-Id: <20210705144914.35094-1-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, While reworking this series starting from the work done up to V3 by OpenSynergy, I am keeping the original autorship and list distribution unchanged. The main aim of this rework, as said, is to simplify where possible the SCMI VirtIO support added in V3 by adding at first some new general mechanisms in the SCMI Transport layer. Indeed, after some initial small fixes, patches 05/06/07/08 add such new additional mechanisms to the SCMI core to ease implementation of more complex transports like virtio, while also addressing a few general issues already potentially affecting existing transports. In terms of rework I dropped original V3 patches 05/06/07/08/12 as no more needed, and modified where needed the remaining original patches to take advantage of the above mentioned new SCMI transport features. DT bindings patch has been ported on top of freshly YAML converted arm,scmi bindings. Moreover, in V5 I dropped support for polling mode from the virtio-scmi transport, since it is an optional general mechanism provided by the core to allow transports lacking a completion IRQ to work and it seemed a needless addition/complication in the context of virtio transport. Additionally, in V5 I could also simplify a bit the virtio transport probing sequence starting from the observation that, by the VirtIO spec, in fact, only one single SCMI VirtIO device can possibly exist on a system. This V5 series is based on top of next-20210701 in order to include all the recent DT YAML-conversion changes and all the fixes queued as of today in sudeep/for-next/scmi. The series has been tested using an emulated fake SCMI device and also a proper SCP-fw stack running through QEMU vhost-users, with the SCMI stack compiled, in both cases, as builtin and as s loadable module, running tests against mocked SCMI Sensors using HWMON and IIO interfaces to check the functionality of notifications and sync/async commands. Virtio-scmi support has been exercised in the following testing scenario on a JUNO board: - normal sync/async command transfers - notifications - concurrent delivery of correlated response and delayed responses - out-of-order delivery of delayed responses before related responses - unexpected delayed response delivery for sync commands - late delivery of timed-out responses and delayed responses Some basic regression testing against mailbox transport has been performed for commands and notifications too. No sensible overhead in total handling time of commands and notifications has been observed, even though this series do indeed add a considerable amount of code to execute on TX path. More test and measurements could be needed in these regards. Any feedback/testing is welcome :D Thanks, Cristian --- Cristian Marussi (9): firmware: arm_scmi: Avoid padding in sensor message structure firmware: arm_scmi: Fix max pending messages boundary check firmware: arm_scmi: Add support for type handling in common functions firmware: arm_scmi: Remove scmi_dump_header_dbg() helper firmware: arm_scmi: Add transport optional init/exit support firmware: arm_scmi: Introduce monotonically increasing tokens firmware: arm_scmi: Handle concurrent and out-of-order messages firmware: arm_scmi: Introduce optional support for delegated xfers firmware: arm_scmi: Make SCMI transports configurable Igor Skalkin (4): firmware: arm_scmi: Make shmem support optional for transports firmware: arm_scmi: Add method to override max message number dt-bindings: arm: Add virtio transport for SCMI firmware: arm_scmi: Add virtio transport Peter Hilber (2): firmware: arm_scmi: Add message passing abstractions for transports firmware: arm_scmi: Add optional link_supplier() transport op .../bindings/firmware/arm,scmi.yaml | 8 +- MAINTAINERS | 1 + drivers/firmware/Kconfig | 34 +- drivers/firmware/arm_scmi/Kconfig | 97 +++ drivers/firmware/arm_scmi/Makefile | 8 +- drivers/firmware/arm_scmi/common.h | 99 ++- drivers/firmware/arm_scmi/driver.c | 792 ++++++++++++++++-- drivers/firmware/arm_scmi/msg.c | 113 +++ drivers/firmware/arm_scmi/sensors.c | 6 +- drivers/firmware/arm_scmi/virtio.c | 545 ++++++++++++ include/uapi/linux/virtio_ids.h | 1 + include/uapi/linux/virtio_scmi.h | 23 + 12 files changed, 1593 insertions(+), 134 deletions(-) create mode 100644 drivers/firmware/arm_scmi/Kconfig create mode 100644 drivers/firmware/arm_scmi/msg.c create mode 100644 drivers/firmware/arm_scmi/virtio.c create mode 100644 include/uapi/linux/virtio_scmi.h -- 2.17.1