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=-5.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 21389C4727C for ; Wed, 30 Sep 2020 07:22:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CAC7B20848 for ; Wed, 30 Sep 2020 07:22:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dIjQ4Kq7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725823AbgI3HWY (ORCPT ); Wed, 30 Sep 2020 03:22:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725440AbgI3HWY (ORCPT ); Wed, 30 Sep 2020 03:22:24 -0400 Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F020C061755; Wed, 30 Sep 2020 00:22:22 -0700 (PDT) Received: by mail-pl1-x641.google.com with SMTP id y6so473217plt.9; Wed, 30 Sep 2020 00:22:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=yJyPv9TfvoTiNiepUCS1moee1qgA1MUCDqAQ76iLRGw=; b=dIjQ4Kq7OP6C1q55KiX7llzOLRIxLxLiAEZUJPtcvKr22oEfblNhrGHtxeM8XIyCOI /W/jTi0/dVSNlDsYDUxCqyCzw0wIbPPIoOJWVZHcnie4W616Ent7T6zODTqDg4uABts3 hi4fibufYdX0d39thb8ihr7pTCHR/Dhpy1nhM0TrWsDYMdy+FTasX9wI62aVQ/AnQYYp pUnD1gPZir2hrCQi/uqU7HKaMUy8FwlN03RAm6Ik1W8MPPt8lyjBlvVE7Od59AX3Y7Lr RuEK7b1wgvRayFlXhpzLopy50CZF5YLeVwJmAs68gQYgRH/Lmg82pi3Vhn9zwF5h3ImP hfNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=yJyPv9TfvoTiNiepUCS1moee1qgA1MUCDqAQ76iLRGw=; b=ZYBVykERjxmboW6sG1JmUZRxXkdlq5s9e2OlFO+bI0eWzop2IsEvQUU7g0bVRUKejW gmVSIcJfPg4ZScRn7w62WPWYKoRgd/Gyds//hB6y060Gd8xUdrRTL1KcV9+4ntllsrt3 wICoYfZI6kTxJ1LqK5GfLPAUxakfe+Mp6Jgsrpmuc79EjaEFekkHKQTKH1LjXnI9kB58 Ru7JS0U8AnhNo1EM2l2Bqkx5tLWLy+Uo3hUjuVjIFRt6rmRPaY+bHef5or5dy5aUiz8j PDcviwl62mhyZeDwraWuKpZdUFv1VPtsSdmIaDWdYt7UGHBzppVTz37cPAuocYDhlweN N6HA== X-Gm-Message-State: AOAM531rG09n/foOyK22nx91wTBE3hRYcUn8GTtmtFQ6qhfTA4E5dkjl fCgdDGMUprPt0KuiDzzcFIU= X-Google-Smtp-Source: ABdhPJz/rnWA9bYT3PPtMlpoljxk/a7LibergtvDqyjwYz/Z7mihUyup7d6kfRH6Q8SIbLPsHcf17A== X-Received: by 2002:a17:90a:c17:: with SMTP id 23mr1347882pjs.127.1601450541995; Wed, 30 Sep 2020 00:22:21 -0700 (PDT) Received: from Asurada-Nvidia (thunderhill.nvidia.com. [216.228.112.22]) by smtp.gmail.com with ESMTPSA id v65sm939141pgv.21.2020.09.30.00.22.21 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Wed, 30 Sep 2020 00:22:21 -0700 (PDT) Date: Wed, 30 Sep 2020 00:16:50 -0700 From: Nicolin Chen To: Dmitry Osipenko Cc: thierry.reding@gmail.com, joro@8bytes.org, krzk@kernel.org, vdumpa@nvidia.com, jonathanh@nvidia.com, linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support Message-ID: <20200930071650.GB13876@Asurada-Nvidia> References: <20200930003013.31289-1-nicoleotsuka@gmail.com> <20200930003013.31289-4-nicoleotsuka@gmail.com> <20200930052952.GB31821@Asurada-Nvidia> <96e71d38-5888-5b21-f0e1-9e6def50484e@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <96e71d38-5888-5b21-f0e1-9e6def50484e@gmail.com> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org On Wed, Sep 30, 2020 at 08:58:50AM +0300, Dmitry Osipenko wrote: > 30.09.2020 08:29, Nicolin Chen пишет: > > Hi Dmitry, > > > > On Wed, Sep 30, 2020 at 08:10:07AM +0300, Dmitry Osipenko wrote: > >> 30.09.2020 03:30, Nicolin Chen пишет: > >>> - group->group = iommu_group_alloc(); > >>> + group->group = pci ? pci_device_group(dev) : iommu_group_alloc(); > >> > >> This will be nicer to write as: > >> > >> if (dev_is_pci(dev)) > >> group->group = pci_device_group(dev); > >> else > >> group->group = generic_device_group(dev); > > > > Why is that nicer? I don't feel mine is hard to read at all... > > > > Previously you said that you're going to add USB support, so I assume > there will be something about USB. I was hoping that it'd work for USB. Yet USB doesn't seem to have an different function for device_group(). > It's also a kinda common style that majority of Tegra drivers use in > upstream kernel. But yours variant is good too if there won't be a need > to change it later on. Okay..I'll use yours then. Thanks 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=-5.0 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 1BC8EC2D0A8 for ; Wed, 30 Sep 2020 07:22:25 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B0BF0207C3 for ; Wed, 30 Sep 2020 07:22:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="dIjQ4Kq7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B0BF0207C3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 4DD4686F74; Wed, 30 Sep 2020 07:22:24 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ja2LwgSivJ75; Wed, 30 Sep 2020 07:22:23 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id E70CC86F84; Wed, 30 Sep 2020 07:22:23 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D1DEAC016F; Wed, 30 Sep 2020 07:22:23 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id E6E8CC0051 for ; Wed, 30 Sep 2020 07:22:22 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id E1B0786840 for ; Wed, 30 Sep 2020 07:22:22 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w-0KIYgoyAVH for ; Wed, 30 Sep 2020 07:22:22 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail-pj1-f68.google.com (mail-pj1-f68.google.com [209.85.216.68]) by whitealder.osuosl.org (Postfix) with ESMTPS id 5F11684D89 for ; Wed, 30 Sep 2020 07:22:22 +0000 (UTC) Received: by mail-pj1-f68.google.com with SMTP id s14so503763pju.1 for ; Wed, 30 Sep 2020 00:22:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=yJyPv9TfvoTiNiepUCS1moee1qgA1MUCDqAQ76iLRGw=; b=dIjQ4Kq7OP6C1q55KiX7llzOLRIxLxLiAEZUJPtcvKr22oEfblNhrGHtxeM8XIyCOI /W/jTi0/dVSNlDsYDUxCqyCzw0wIbPPIoOJWVZHcnie4W616Ent7T6zODTqDg4uABts3 hi4fibufYdX0d39thb8ihr7pTCHR/Dhpy1nhM0TrWsDYMdy+FTasX9wI62aVQ/AnQYYp pUnD1gPZir2hrCQi/uqU7HKaMUy8FwlN03RAm6Ik1W8MPPt8lyjBlvVE7Od59AX3Y7Lr RuEK7b1wgvRayFlXhpzLopy50CZF5YLeVwJmAs68gQYgRH/Lmg82pi3Vhn9zwF5h3ImP hfNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=yJyPv9TfvoTiNiepUCS1moee1qgA1MUCDqAQ76iLRGw=; b=Hagd6gyRAetoPa+oqs97qUocK+neM1kTyizw0rPcAtRrDrTHSwOTGV1BZnYnmgIvnN oMYaMRcmvOtnDMxiFwBXDnRM3yzkPrLlO1vsnwlsfI+eY1DiPqTBPaSsbeE/qvezt0ZA DeMEbA6/xzPD/khSuIzBcMoqGVdOCgaQNuq4OB1M67VandDe785qtbKwXc0o55+5L0uw A11uplANgc7PzB5sl3DYODS0qoKT3+i0riKHG5jzBVrKwm0LB1MzofqpUDMl23/6jSTV SIesCcfFtRvMHmEMfOrRAAwGgIVNcNTrUnH211+7Rw/Ax8EHe7kNd3jR8OL0/YpVHhaS dXeg== X-Gm-Message-State: AOAM531mijcJ8gsOvn8C3OsD2eM9p3Kv5gBSgfITG4uXJh8dhWlY/ccc 0WwZRKTvAeOTEwbTb/f969k= X-Google-Smtp-Source: ABdhPJz/rnWA9bYT3PPtMlpoljxk/a7LibergtvDqyjwYz/Z7mihUyup7d6kfRH6Q8SIbLPsHcf17A== X-Received: by 2002:a17:90a:c17:: with SMTP id 23mr1347882pjs.127.1601450541995; Wed, 30 Sep 2020 00:22:21 -0700 (PDT) Received: from Asurada-Nvidia (thunderhill.nvidia.com. [216.228.112.22]) by smtp.gmail.com with ESMTPSA id v65sm939141pgv.21.2020.09.30.00.22.21 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Wed, 30 Sep 2020 00:22:21 -0700 (PDT) Date: Wed, 30 Sep 2020 00:16:50 -0700 From: Nicolin Chen To: Dmitry Osipenko Subject: Re: [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support Message-ID: <20200930071650.GB13876@Asurada-Nvidia> References: <20200930003013.31289-1-nicoleotsuka@gmail.com> <20200930003013.31289-4-nicoleotsuka@gmail.com> <20200930052952.GB31821@Asurada-Nvidia> <96e71d38-5888-5b21-f0e1-9e6def50484e@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <96e71d38-5888-5b21-f0e1-9e6def50484e@gmail.com> User-Agent: Mutt/1.9.4 (2018-02-28) Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, krzk@kernel.org, jonathanh@nvidia.com, thierry.reding@gmail.com, linux-tegra@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gV2VkLCBTZXAgMzAsIDIwMjAgYXQgMDg6NTg6NTBBTSArMDMwMCwgRG1pdHJ5IE9zaXBlbmtv IHdyb3RlOgo+IDMwLjA5LjIwMjAgMDg6MjksIE5pY29saW4gQ2hlbiDQv9C40YjQtdGCOgo+ID4g SGkgRG1pdHJ5LAo+ID4gCj4gPiBPbiBXZWQsIFNlcCAzMCwgMjAyMCBhdCAwODoxMDowN0FNICsw MzAwLCBEbWl0cnkgT3NpcGVua28gd3JvdGU6Cj4gPj4gMzAuMDkuMjAyMCAwMzozMCwgTmljb2xp biBDaGVuINC/0LjRiNC10YI6Cj4gPj4+IC0JZ3JvdXAtPmdyb3VwID0gaW9tbXVfZ3JvdXBfYWxs b2MoKTsKPiA+Pj4gKwlncm91cC0+Z3JvdXAgPSBwY2kgPyBwY2lfZGV2aWNlX2dyb3VwKGRldikg OiBpb21tdV9ncm91cF9hbGxvYygpOwo+ID4+Cj4gPj4gVGhpcyB3aWxsIGJlIG5pY2VyIHRvIHdy aXRlIGFzOgo+ID4+Cj4gPj4gaWYgKGRldl9pc19wY2koZGV2KSkKPiA+PiAgICAgZ3JvdXAtPmdy b3VwID0gcGNpX2RldmljZV9ncm91cChkZXYpOwo+ID4+IGVsc2UKPiA+PiAgICAgZ3JvdXAtPmdy b3VwID0gZ2VuZXJpY19kZXZpY2VfZ3JvdXAoZGV2KTsKPiA+IAo+ID4gV2h5IGlzIHRoYXQgbmlj ZXI/IEkgZG9uJ3QgZmVlbCBtaW5lIGlzIGhhcmQgdG8gcmVhZCBhdCBhbGwuLi4KPiA+IAo+IAo+ IFByZXZpb3VzbHkgeW91IHNhaWQgdGhhdCB5b3UncmUgZ29pbmcgdG8gYWRkIFVTQiBzdXBwb3J0 LCBzbyBJIGFzc3VtZQo+IHRoZXJlIHdpbGwgYmUgc29tZXRoaW5nIGFib3V0IFVTQi4KCkkgd2Fz IGhvcGluZyB0aGF0IGl0J2Qgd29yayBmb3IgVVNCLiBZZXQgVVNCIGRvZXNuJ3Qgc2VlbSB0byBo YXZlCmFuIGRpZmZlcmVudCBmdW5jdGlvbiBmb3IgZGV2aWNlX2dyb3VwKCkuCgo+IEl0J3MgYWxz byBhIGtpbmRhIGNvbW1vbiBzdHlsZSB0aGF0IG1ham9yaXR5IG9mIFRlZ3JhIGRyaXZlcnMgdXNl IGluCj4gdXBzdHJlYW0ga2VybmVsLiBCdXQgeW91cnMgdmFyaWFudCBpcyBnb29kIHRvbyBpZiB0 aGVyZSB3b24ndCBiZSBhIG5lZWQKPiB0byBjaGFuZ2UgaXQgbGF0ZXIgb24uCgpPa2F5Li5JJ2xs IHVzZSB5b3VycyB0aGVuLgoKVGhhbmtzCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3Vu ZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0 aW5mby9pb21tdQ==