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=-13.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 15C9BC4361B for ; Mon, 14 Dec 2020 17:46:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2EDC21D42 for ; Mon, 14 Dec 2020 17:46:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2408718AbgLNRqe (ORCPT ); Mon, 14 Dec 2020 12:46:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407162AbgLNRqJ (ORCPT ); Mon, 14 Dec 2020 12:46:09 -0500 Received: from mail-pj1-x1044.google.com (mail-pj1-x1044.google.com [IPv6:2607:f8b0:4864:20::1044]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE911C0613D6 for ; Mon, 14 Dec 2020 09:45:29 -0800 (PST) Received: by mail-pj1-x1044.google.com with SMTP id j13so7009764pjz.3 for ; Mon, 14 Dec 2020 09:45:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:from:to:cc:subject:date:message-id:in-reply-to :references; bh=BMNX0eKhrczmr1lDf9NVxbaAp2l3pD8QlrEiIgF9pWU=; b=NlqyIfjwICmsGMvEv5gEGUd2SnYCUjgCNEvbAnKRS7K4kbIIsSqocXsNXkj3K0U7b3 YP/79Mg03fZVI0bAPt/NwogCcM5O8FGEzaYzJdn0g/0TyMGraIcxpl8sijJaBxhGpCVI asj/bgQffTF9F/GlEK4kbYmpdN9/zFishgxqY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :in-reply-to:references; bh=BMNX0eKhrczmr1lDf9NVxbaAp2l3pD8QlrEiIgF9pWU=; b=WpYD1aGltoXg4fS+66QgljYuCYE+03MUWbUhkCAJ/sMNVpWr34ZtJQq/VMrlGf0m7D nAtj7MAbkkA2naanuX+KGhHWXxQR6F5ZF5MHwgrUYwc5eHF69eUhGh+kqniIe/ij9nOR kJxf5Jn0t82e/PatY7wn/qaiinJanngWbLbrrULQubjNJSsfDKL5Laji/zhrWc/yYrmU 1RE3r6tichufp+Vui4zHk6GK5ztLznfIzZxUyYm80N3oGscAfoZkwsByTQ+u6Gg1ZE0Q wFZk/bJV6PyYcC0YpB+4Llfe7Q7jfNktTWKBV6JxOXXn2rwt+BDPnQmEugtVh1EltQdS OhUQ== MIME-Version: 1.0 X-Gm-Message-State: AOAM530FG49tJLBY87qYd5pTJRdg5NP/jM2VMrTsZAVungFAuCSmHPwO Rw8TGhR+BlyRzsF47ZP+k20P5zuuLrDK9SnRy753hruxy2Vw92ZCEHfwKMQPtgDT1V6f+KqiPN7 rAOWAGQ1ljppqUkc= X-Google-Smtp-Source: ABdhPJx5QiCPwN50K+LREilTYGjyEtiHQSZRpErcamh+B+9kk8PEkIf0bPJaXsyoGTCZKvTW1rP0tA== X-Received: by 2002:a17:90a:a781:: with SMTP id f1mr15360359pjq.111.1607967928796; Mon, 14 Dec 2020 09:45:28 -0800 (PST) Received: from rahul_yocto_ubuntu18.ibn.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id m8sm6658131pgg.78.2020.12.14.09.45.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Dec 2020 09:45:27 -0800 (PST) From: Vikas Gupta To: eric.auger@redhat.com, alex.williamson@redhat.com, cohuck@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: vikram.prakash@broadcom.com, srinath.mannam@broadcom.com, ashwin.kamath@broadcom.com, zachary.schroff@broadcom.com, manish.kurup@broadcom.com, Vikas Gupta Subject: [RFC, v3 0/2] msi support for platform devices Date: Mon, 14 Dec 2020 23:15:12 +0530 Message-Id: <20201214174514.22006-1-vikas.gupta@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201124161646.41191-1-vikas.gupta@broadcom.com> References: <20201124161646.41191-1-vikas.gupta@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000003e826505b67035d6" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --0000000000003e826505b67035d6 Content-Type: text/plain; charset="US-ASCII" This RFC adds support for MSI for platform devices. MSI block is added as an ext irq along with the existing wired interrupt implementation. The patchset exports two caps for MSI and related data to configure MSI source device. Changes from: ------------- v2 to v3: 1) Restored the vendor specific module to get max number of MSIs supported and .count value initialized. 2) Comments from Eric addressed. v1 to v2: 1) IRQ allocation has been implemented as below: ---------------------------- |IRQ-0|IRQ-1|....|IRQ-n|MSI| ---------------------------- MSI block has msi contexts and its implemneted as ext irq. 2) Removed vendor specific module for msi handling so previously patch2 and patch3 are not required. 3) MSI related data is exported to userspace using 'caps'. Please note VFIO_IRQ_INFO_CAP_TYPE in include/uapi/linux/vfio.h implementation is taken from the Eric`s patch https://patchwork.kernel.org/project/kvm/patch/20201116110030.32335-8-eric.auger@redhat.com/ v0 to v1: i) Removed MSI device flag VFIO_DEVICE_FLAGS_MSI. ii) Add MSI(s) at the end of the irq list of platform IRQs. MSI(s) with first entry of MSI block has count and flag information. IRQ list: Allocation for IRQs + MSIs are allocated as below Example: if there are 'n' IRQs and 'k' MSIs ------------------------------------------------------- |IRQ-0|IRQ-1|....|IRQ-n|MSI-0|MSI-1|MSI-2|......|MSI-k| ------------------------------------------------------- MSI-0 will have count=k set and flags set accordingly. Vikas Gupta (2): vfio/platform: add support for msi vfio/platform: msi: add Broadcom platform devices drivers/vfio/platform/Kconfig | 1 + drivers/vfio/platform/Makefile | 1 + drivers/vfio/platform/msi/Kconfig | 9 + drivers/vfio/platform/msi/Makefile | 2 + .../vfio/platform/msi/vfio_platform_bcmplt.c | 49 ++++ drivers/vfio/platform/vfio_platform_common.c | 179 +++++++++++- drivers/vfio/platform/vfio_platform_irq.c | 260 +++++++++++++++++- drivers/vfio/platform/vfio_platform_private.h | 32 +++ include/uapi/linux/vfio.h | 44 +++ 9 files changed, 558 insertions(+), 19 deletions(-) create mode 100644 drivers/vfio/platform/msi/Kconfig create mode 100644 drivers/vfio/platform/msi/Makefile create mode 100644 drivers/vfio/platform/msi/vfio_platform_bcmplt.c -- 2.17.1 -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. 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