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=-13.6 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 1784DC2D0E4 for ; Tue, 24 Nov 2020 16:17:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A4D2208B8 for ; Tue, 24 Nov 2020 16:17:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="BUL6tmf5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390240AbgKXQRf (ORCPT ); Tue, 24 Nov 2020 11:17:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389794AbgKXQRf (ORCPT ); Tue, 24 Nov 2020 11:17:35 -0500 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08FB4C0613D6 for ; Tue, 24 Nov 2020 08:17:35 -0800 (PST) Received: by mail-pf1-x441.google.com with SMTP id q10so18975823pfn.0 for ; Tue, 24 Nov 2020 08:17:35 -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=neVtOXj4si/s489rQKuJHCDZEMCd0omMkN3LV1cgloY=; b=BUL6tmf5UQW1/m9bV9yMrlorTUs0wrjO7L0AURFOf8REqi++rCLXKPtQ+7vuUNjXaI jdel5M3S1VQbfEprhEvvCh+++GIMMwZ5eEoyVLmUr7IxbYv8UCSsDM0tPsYLfIT8qGd8 QBJplCe+GGBlpRolbipS6VT2IMGVhSmjWROyU= 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=neVtOXj4si/s489rQKuJHCDZEMCd0omMkN3LV1cgloY=; b=o1KlCz/yXd8NVeyXxjCWhYiBYFm+adY/0DHqX1y1tpztQpbbBY1sjDhQa4H234jBaQ ERXaFbtN3S/D+DjTbei6LKr/2CCiscq/6gLCJuRdF/7jzYXvfTDu6Qc0nCsgXpWkvm5O PrTGLuLymitCngbeHBPBpCgcOpvU+1Edy6Rfe2y13PW9bi6drG+FUpnl9LT19dCR4mH/ mmijIpd28fw3UxjPT+/ticloibzxzZQCeBcvTO2AKw/AMiIS6jmMS9LW6GEFROfVb7/V tB4HvEBArwaGYudikplieVRRRFqFhYe97pEn4+mSDdQwnWeUMO6dQD+0tURBB9L3HIo4 JT1A== X-Gm-Message-State: AOAM532SrwAC5oARhyKYvVUFd3fJcWNBeu3PSKuhOaKUI8PjOmX7p1Kq CRqB1xrbB3WhbpoaU4AbxP9ujg== X-Google-Smtp-Source: ABdhPJwojqBzccB5bu89FllRpPMAi909Yd9PoVZKGKVNFflUAow+6FzaHTA9ezibuYHFF4NgR824TA== X-Received: by 2002:a17:90a:fb87:: with SMTP id cp7mr5958416pjb.0.1606234654182; Tue, 24 Nov 2020 08:17:34 -0800 (PST) Received: from rahul_yocto_ubuntu18.ibn.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id t9sm2798549pfq.39.2020.11.24.08.17.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Nov 2020 08:17:32 -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, v2 0/1] msi support for platform devices Date: Tue, 24 Nov 2020 21:46:45 +0530 Message-Id: <20201124161646.41191-1-vikas.gupta@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201112175852.21572-1-vikas.gupta@broadcom.com> References: <20201112175852.21572-1-vikas.gupta@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000005ae6d05b4dca666" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --00000000000005ae6d05b4dca666 This RFC adds support for MSI for platform devices. MSI block is added as an ext irq along with the existing wired interrupt implementation. Changes from: ------------- 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 (1): vfio/platform: add support for msi drivers/vfio/platform/vfio_platform_common.c | 99 ++++++- drivers/vfio/platform/vfio_platform_irq.c | 260 +++++++++++++++++- drivers/vfio/platform/vfio_platform_private.h | 16 ++ include/uapi/linux/vfio.h | 43 +++ 4 files changed, 401 insertions(+), 17 deletions(-) -- 2.17.1 --00000000000005ae6d05b4dca666 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 Ckdsb2JhbFNpZ24wHhcNMTYwNjE1MDAwMDAwWhcNMjQwNjE1MDAwMDAwWjBdMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEzMDEGA1UEAxMqR2xvYmFsU2lnbiBQZXJzb25h 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