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=-6.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 003C6C433DB for ; Sun, 24 Jan 2021 20:48:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B451422C7B for ; Sun, 24 Jan 2021 20:48:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726261AbhAXUs0 (ORCPT ); Sun, 24 Jan 2021 15:48:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726164AbhAXUsZ (ORCPT ); Sun, 24 Jan 2021 15:48:25 -0500 Received: from mail-lf1-x12a.google.com (mail-lf1-x12a.google.com [IPv6:2a00:1450:4864:20::12a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 40E61C061574 for ; Sun, 24 Jan 2021 12:47:45 -0800 (PST) Received: by mail-lf1-x12a.google.com with SMTP id v67so14894842lfa.0 for ; Sun, 24 Jan 2021 12:47:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=OtckoQPcOT8GN3ynOcPT0TdoFntM7SkiESYUJ+CYBSo=; b=VJh18Y/9TQ8HxE8Vk5HwJeDH93Gvmx6zLDWXjReuSw0o7BduvLUQCgynzvO87CCIcd UuMpLyi9U7j0/k/HgrXCk3UGpeC18nWBvr2c6ztQyxAQ5uH7ma/lGqHW8C5hhmXsSBX8 up2dYjMS+RGzyMgMYBRLJCXpEbW6L1dmeesC4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=OtckoQPcOT8GN3ynOcPT0TdoFntM7SkiESYUJ+CYBSo=; b=cbgplm1/LpIciPLn/JhgSGjKfvnqN7mbAjn9GKeO1m57wDQHqiRYOE/g0c424HxfrX A1r1jVpqlkMK0CyaQtXVPPg4zXlAq7Hzse/56as6iGVH3nvHZ0Y6kpBsbbM9hAM962QW 5QOm106nkml2NFJ1/gA4JTA/JXOa1zxT7JNr20F/Znv7HmhQCDd0gNYg8NRBeKkzUJtK hBpfWk1Yq1OYBvRW9P6GvOdy6LsLZOuqM4qQNBOP9aGfytYVyuVZIXcL9XOlawxYf2w9 LiIBBHqgR0tm8Opc5U77YEhSmy6iHhuXk4CG2Y6YDd05gctybsXf98WWgJQlMPd9sA/E rVrg== X-Gm-Message-State: AOAM533NObdX1qzs1XltjSVJ/0FlM8AzjlhdKPDZC5ubWTXaCH2NYA39 PDJY6YYqQfiPVIiuyTaWYz5XMlyLIBcydvl6lm3jVg== X-Google-Smtp-Source: ABdhPJz5CmHOdyj+rN+RHjFnDtGfLpDGabC1JacCr75HJDhsLEthd9TW3Y1zk9VbCU5z86Wj7AvLij8wCh91X9S2cwg= X-Received: by 2002:a19:c17:: with SMTP id 23mr2111276lfm.464.1611521263420; Sun, 24 Jan 2021 12:47:43 -0800 (PST) MIME-Version: 1.0 References: <20210122193658.282884-1-saeed@kernel.org> In-Reply-To: <20210122193658.282884-1-saeed@kernel.org> From: Edwin Peer Date: Sun, 24 Jan 2021 12:47:07 -0800 Message-ID: Subject: Re: [pull request][net-next V10 00/14] Add mlx5 subfunction support To: Saeed Mahameed Cc: "David S. Miller" , Jakub Kicinski , Jason Gunthorpe , netdev , linux-rdma@vger.kernel.org, Alexander Duyck , Sridhar Samudrala , David Ahern , Kiran Patil , Jacob Keller , "Ertman, David M" , Dan Williams , Saeed Mahameed Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000007a50a405b9ab8868" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --0000000000007a50a405b9ab8868 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, Jan 22, 2021 at 11:37 AM Saeed Mahameed wrote: > This series form Parav was the theme of this mlx5 release cycle, > we've been waiting anxiously for the auxbus infrastructure to make it int= o > the kernel, and now as the auxbus is in and all the stars are aligned, I > can finally submit this patchset of the devlink and mlx5 subfunction supp= ort. > > For more detailed information about subfunctions please see detailed tag > log below. Apologies for the tardy question out of left field, but I've been thinking about this some more. If I recall, the primary motivation for this was a means to effectively address more VFs? But, why can't the device simply expose more bus numbers? >From the PCI spec: "SR-IOV Devices may consume more than one Bus Number. A VF can be associated with any Bus Number within the Device=E2=80=99s Bus Number range - the captured Bus Number plus any additional Bus Numbers configured by software. See Section 9.2.1.2 for details. - Use of multiple Bus Numbers enables a device to support a very large number of VFs - up to the size of the Routing ID space minus the bits used to identify intervening busses" Regards, Edwin Peer --0000000000007a50a405b9ab8868 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQPAYJKoZIhvcNAQcCoIIQLTCCECkCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg2RMIIE6DCCA9CgAwIBAgIOSBtqCRO9gCTKXSLwFPMwDQYJKoZIhvcNAQELBQAwTDEgMB4GA1UE CxMXR2xvYmFsU2lnbiBSb290IENBIC0gUjMxEzARBgNVBAoTCkdsb2JhbFNpZ24xEzARBgNVBAMT Ckdsb2JhbFNpZ24wHhcNMTYwNjE1MDAwMDAwWhcNMjQwNjE1MDAwMDAwWjBdMQswCQYDVQQGEwJC RTEZMBcGA1UEChMQR2xvYmFsU2lnbiBudi1zYTEzMDEGA1UEAxMqR2xvYmFsU2lnbiBQZXJzb25h bFNpZ24gMiBDQSAtIFNIQTI1NiAtIEczMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA tpZok2X9LAHsYqMNVL+Ly6RDkaKar7GD8rVtb9nw6tzPFnvXGeOEA4X5xh9wjx9sScVpGR5wkTg1 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