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=-13.9 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,MIME_HEADER_CTYPE_ONLY,SPF_HELO_NONE, SPF_PASS,T_TVD_MIME_NO_HEADERS,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 6C362C433E0 for ; Fri, 29 Jan 2021 17:25:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2692F64E04 for ; Fri, 29 Jan 2021 17:25:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232465AbhA2RZc (ORCPT ); Fri, 29 Jan 2021 12:25:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232434AbhA2RZQ (ORCPT ); Fri, 29 Jan 2021 12:25:16 -0500 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56344C061574 for ; Fri, 29 Jan 2021 09:24:36 -0800 (PST) Received: by mail-pg1-x542.google.com with SMTP id s23so5875873pgh.11 for ; Fri, 29 Jan 2021 09:24:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Y56L5ESqbKSgsZmorDYY4Tp7as6euyhMPar5gxkc4hg=; b=hCfvh0h1zrb3T4WFjc0JDqyhC1kEobVL3oYwVl2ghkHv4fXbRTfI6pwbsjhjtq9gz2 igH2ARLP553DrX3lFpHmlsoLwFpoVKmZcg20gocy1qXzh1TjdS1FOnupH+8jXtMQLFB+ BWQkbXSGwsGskOp7FM7fOcva/ZzP0KmDmELzM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Y56L5ESqbKSgsZmorDYY4Tp7as6euyhMPar5gxkc4hg=; b=aK4hAvWg677PViS8PupT8tf+kWm3BR0IKYV2uJfB3D3M1HSF5IlIF/vSAaViO6sdq9 V57j/eYXX/1iqg5f4pkh+B34B8DmZtgv16ozIk0KIgBAmEGfbjxBgLwhqaDhWC6YQT/p yu2Oac2WPfodDKV4fywCmnWZHkfcmwmbZpQN/wIESVpD3u0F/3mxmKx6urRHuuzfYuHA 30dXuVMXwGbjva9gKz2ATYitd/6xf0Nlh8eCa7Ouh4iKyCQJv87ezQnQK8Boe9yAlgpz 5sw2ByvcTTf2158mjDS/M8eG9HRQtKhrwkGOF+0tAQ7PBykyeOZmwVBJxCLay8DhWMSx VC1Q== X-Gm-Message-State: AOAM533Ul+e5/E8lfhIPnxZjdgj4LR80TcmkN97WCHiiEhiQrwCwmz3j GtIHJjVQfu2wCXl0s7qS5bdDOw== X-Google-Smtp-Source: ABdhPJxGcUHp0g3vRP7FsgsDMBLioX2pUt+Y0LlJQcxVnMyRdxObo/5BohnQhuQV7zWhWySokqpCWg== X-Received: by 2002:a63:4c10:: with SMTP id z16mr5968276pga.274.1611941075585; Fri, 29 Jan 2021 09:24:35 -0800 (PST) Received: from rahul_yocto_ubuntu18.ibn.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id w11sm9739016pge.28.2021.01.29.09.24.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Jan 2021 09:24:33 -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 v4 0/3] msi support for platform devices Date: Fri, 29 Jan 2021 22:54:18 +0530 Message-Id: <20210129172421.43299-1-vikas.gupta@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201214174514.22006-1-vikas.gupta@broadcom.com> References: <20201214174514.22006-1-vikas.gupta@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000003c4e3e05ba0d477d" Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org --0000000000003c4e3e05ba0d477d 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: ------------- v3 to v4: 1) Removed the 'cap' for exporting MSI info to userspace and restored into vedor specific module. 2) Enable GENERIC_MSI_IRQ_DOMAIN in Kconfig. 3) Removed the vendor specific, Broadcom, 'msi' module and integrated the MSI relates ops into the 'reset' module for MSI support. 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 (3): vfio/platform: add support for msi vfio/platform: change cleanup order vfio: platform: reset: add msi support drivers/vfio/platform/Kconfig | 1 + .../platform/reset/vfio_platform_bcmflexrm.c | 72 ++++- drivers/vfio/platform/vfio_platform_common.c | 97 +++++-- drivers/vfio/platform/vfio_platform_irq.c | 253 ++++++++++++++++-- drivers/vfio/platform/vfio_platform_private.h | 29 ++ include/uapi/linux/vfio.h | 24 ++ 6 files changed, 444 insertions(+), 32 deletions(-) -- 2.17.1 --0000000000003c4e3e05ba0d477d Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQPwYJKoZIhvcNAQcCoIIQMDCCECwCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg2UMIIE6DCCA9CgAwIBAgIOSBtqCRO9gCTKXSLwFPMwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UE CxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMT 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