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=0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,URIBL_DBL_ABUSE_MALW,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 8E3D8C3524D for ; Mon, 3 Feb 2020 17:08:20 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 606672080D for ; Mon, 3 Feb 2020 17:08:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="duG+zk5j" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 606672080D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=qCy23Kn9uxB9fwGsEl+E7iPi5pdAXEa3hDGBatGrmvU=; b=duG+zk5jWfOjbq QVRN5n//95Zcj9dAfkmDtP9PorFYDtcmeJTCK4jxhIzGMoDtRVme3zfZ7WqoSqftqKKRLKEx1iqYr tiekBM5xqjqLdFVworSgkhZY4lv+P+nqALDD5LMnUx9g/RdFB7jBl7179/vn1btEAvShCmZjMoQ7a FICjSZvggQXJJV4igZDOfo0bm4Mp5mOfb+Dza/9/5Ma6zghy3LJEDk5EB0C8UxwlS3Qvwo2lnPHYT LW6NUYdvuuNVilbTugtVhZqPk3DITVDVRv9m+fu9YvAOxXDM96i+EcnPNipQkCDLrVT0LOBTrbraJ /YDFRrnvldza2DrG5SiA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyfCr-00073g-J7; Mon, 03 Feb 2020 17:08:17 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iyfCo-00072z-0u for linux-arm-kernel@lists.infradead.org; Mon, 03 Feb 2020 17:08:16 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 3F48368BFE; Mon, 3 Feb 2020 18:08:09 +0100 (CET) Date: Mon, 3 Feb 2020 18:08:09 +0100 From: Christoph Hellwig To: Peter Ujfalusi Subject: Re: [PoC] arm: dma-mapping: direct: Apply dma_pfn_offset only when it is valid Message-ID: <20200203170809.GA19293@lst.de> References: <8eb68140-97b2-62ce-3e06-3761984aa5b1@ti.com> <20200114164332.3164-1-peter.ujfalusi@ti.com> <28ee3395-baed-8d59-8546-ab7765829cc8@ti.com> <4f0e307f-29a9-44cd-eeaa-3b999e03871c@arm.com> <75843c71-1718-8d61-5e3d-edba6e1b10bd@ti.com> <20200130075332.GA30735@lst.de> <20200130164010.GA6472@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200203_090814_365810_C2F92470 X-CRM114-Status: GOOD ( 20.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: robh@kernel.org, vigneshr@ti.com, konrad.wilk@oracle.com, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, rogerq@ti.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gRnJpLCBKYW4gMzEsIDIwMjAgYXQgMDQ6MDA6MjBQTSArMDIwMCwgUGV0ZXIgVWpmYWx1c2kg d3JvdGU6Cj4gSSBzZWUuIE15IFBvQyBwYXRjaCB3YXMgbm90IHRvbyBvZmYgdGhlbiA7KQo+IFNv IHRoZSBwbGFuIGlzIHRvIGhhdmUgYSBnZW5lcmljIGltcGxlbWVudGF0aW9uIGZvciBhbGwgb2Yg dGhlCj4gYXJjaGl0ZWN0dXJlLCByaWdodD8KCtCGIGRvbid0IGtub3cgb2YgYSBjb25jcmV0ZSBw bGFuLCBidXQgdGhhdCdzIGRlZmludGl2ZWx5IHdoYXQgSSdkIGxpa2UKdG8gc2VlLgoKPiA+PiBU aGUgZG1hX3Bmbl9vZmZzZXQgaXMgX3N0aWxsXyBhcHBsaWVkIHRvIHRoZSBtYXNrIHdlIGFyZSB0 cnlpbmcgdG8gc2V0Cj4gPj4gKGFuZCB2YWxpZGF0ZSkgdmlhIGRtYS1kaXJlY3QuCj4gPiAKPiA+ IEFuZCBmb3IgdGhlIGdlbmVyYWwgY2FzZSB0aGF0IGlzIGV4YWN0bHkgdGhlIHJpZ2h0IHRoaW5n IHRvIGRvLCB3ZQo+ID4ganVzdCBuZWVkIHRvIGRlYWwgd2l0aCByZWFsbHkgb2RkIFpPTkVfRE1B IHBsYWNlbWVudHMgbGlrZSB5b3Vycy4KPiAKPiBJJ20gc3RpbGwgbm90IGNvbnZpbmNlZCwgdGhl IHBvaW50IG9mIHRoZSBETUEgbWFzaywgYXQgbGVhc3QgaG93IEkgc2VlCj4gaXQsIHRvIGNoZWNr IHRoYXQgdGhlIGRtYSBhZGRyZXNzIGNhbiBiZSBoYW5kbGVkIGJ5IHRoZSBkZXZpY2UgKERNQSwK PiBwZXJpcGhlcmFsIHdpdGggYnVpbHQgaW4gRE1BLCBldGMpLCBpdCBpcyBub3QgYWdhaW5zdCBw aHlzaWNhbCBhZGRyZXNzLgo+IERvaW5nIHBoeXNfdG9fZG1hKCkgb24gdGhlIG1hc2sgZnJvbSB0 aGUgZG1hX3NldF9tYXNrKCkgaXMganVzdCB3cm9uZy4KCldlIGhhdmUgYSB0cmFuc2xhdGlvbiBi ZXR3ZWVuIHRoZSBhZGRyZXNzZXMgdGhhdCB0aGUgZGV2aWNlIHNlZXMsIGFuZAp0aG9zZSB0aGF0 IHRoZSBDUFUgc2Vlcy4gIFRoZSBkZXZpY2UgY2FuIGFkZHJlc3MgTiBiaXRzIG9mIGFkZHJlc3Mg c3BhY2UKYXMgc2VlbiBmcm9tIHRoZSBkZXZpY2UuICBUaGUgYWRkcmVzc2VzIGVuY29kZWQgaW4g bWF4X3BmbiwKem9uZV9kbWFfYml0cyBvciB0aGUgaGFyY29kZWQgMzIgaW4gdGhlIHpvbmUgZG1h IDMyIGNhc2UgYXJlIENQVSBhZGRyZXNzLgpTbyBubywgd2UgY2FuJ3QgYmxpbmRseSBjb21wYXJl IHRob3NlLgoKCj4gPiBCdXQgdGhhdCB3aWxsIGNhdXNlIHlldCBhbm90aGVyIHJlZ3Jlc3Npb24g aW4gd2hhdCB3ZSBoYXZlIGp1c3QgZml4ZWQKPiA+IHdpdGggdXNpbmcgdGhlIGdlbmVyaWMgZGly ZWN0IG9wcywgYXQgd2hpY2ggcG9pbnRzIGl0IHR1cm5zIGludG8gd2hvCj4gPiBzY3JlYW1zIGxv dWRlci4KPiAKPiBIZWhlLCBJIHNlZS4KPiBJIGdlbnVpbmVseSBjdXJpb3VzIHdoeSBrMiBwbGF0 Zm9ybSB3b3JrZWQganVzdCBmaW5lIHdpdGggTFBBRSAoaXQgbmVlZHMKPiBpdCksIGJ1dCBndXlz IGhhZCBpc3N1ZXMgd2l0aCBMUEFFIG9uIGRyYTcvYW01Lgo+IFRoZSBmaXggZm9yIGRyYTcvYW01 IGJyb2tlIGsyLgo+IEFzIGZhciBhcyBJIGNhbiBzZWUgdGhlIG1haW4gKG9ubHkpIGRpZmZlcmVu Y2UgaXMgdGhhdCBrMiBoYXZlCj4gZG1hX3Bmbl9vZmZzZXQgPSAweDc4MDAwMCwgd2hpbGUgZHJh Ny9hbTUgaGF2ZSBpdCAwIChyZWFsbHkgZGlyZWN0IG1hcHBpbmcpLgoKSG93IG11Y2ggbWVtb3J5 IGRvZXMgdGhlIHBsYXRmb3JtIGhhdmU/ICBPbmNlIHlvdSBhcmUgYWJvdmUgMzItYml0cyB3b3J0 aApvZiBhZGRyZXNzIHNwYWNlIGRldmljZXMgd2l0aCBhIDMyLWJpdCBETUEgbWFzayBjYW4ndCBh ZGRyZXNzIGFsbCB0aGUKbWVtb3J5LiAgTm93IGlmIGsyIGZvciBleGFtcGxlIG9ubHkgaGFkIGxl c3MgdGhhbiA0RyBvZiBtZW1vcnksIGJ1dCBhdAphZGRyZXNzZXMgb3ZlciA0RywgYW5kIHRoZSBv ZmZzZXQgY29tcGVuc2F0ZXMgZm9yIHRoZSBvZmZzZXQgb2YgdGhlIERSQU0KaXQgd29ya3Mgd2l0 aG91dCBib3VuY2UgYnVmZmVyaW5nIGFuZCB0aHVzIGRpZG4ndCBuZWVkIHN3aW90bGIuICBCdXQg YW55CnBsYXRmb3JtIHRoYXQgaGFzIERSQU0gdGhhdCBpcyBub3QgYWRkcmVzc2FibGUgd2lsbCBu ZWVkIHN3aW90bGIuCgo+ID4gIAl1NjQgbWluX21hc2s7Cj4gPiAgCj4gPiArCWlmIChtYXNrID49 IERNQV9CSVRfTUFTSygzMikpCj4gPiArCQlyZXR1cm4gMTsKPiA+ICsKPiAKPiBSaWdodCwgc28g c2tpcHBpbmcgcGh5c190b19kbWEoKSBmb3IgdGhlIG1hc2sgYW5kIGJlbGlldmluZyB0aGF0IGl0 IHdpbGwKPiB3b3JrLi4KPiAKPiBJdCBkb2VzOiBhdWRpbyBhbmQgZG1hdGVzdCBtZW1jcHkgdGVz dHMgYXJlIGp1c3QgZmluZSB3aXRoIHRoaXMsIE1NQwo+IGFsc28gcHJvYmVkIHdpdGggQURNQSBl bmFibGVkLgo+IAo+IEFzIGZhciBhcyBJIGNhbiB0ZWxsIGl0IHdvcmtzIGFzIHdlbGwgYXMgZmFs bGluZyBiYWNrIHRvIHRoZSBvbGQgYXJtIG9wcwo+IGluIGNhc2Ugb2YgTFBBRSAmJiBkbWFfcGZu X29mZnNldCAhPSAwCj4gCj4gRndpdzoKPiBUZXN0ZWQtYnk6IFBldGVyIFVqZmFsdXNpIDxwZXRl ci51amZhbHVzaUB0aS5jb20+Cj4gCj4gV291bGQgeW91IGJlIGNvbWZvcnRhYmxlIHRvIHNlbmQg dGhpcyBwYXRjaCBmb3IgbWFpbmxpbmUgd2l0aAo+IEZpeGVzOiBhZDNjN2IxOGM1YjMgKCJhcm06 IHVzZSBzd2lvdGxiIGZvciBib3VuY2UgYnVmZmVyaW5nIG9uIExQQUUKPiBjb25maWdzIikKClRo YXQgaXMgdGhlIGJpZyBxdWVzdGlvbi4gIEkgZG9uJ3QgZmVlbCBvdmVybHkgY29tZm9ydGFibGUg YXMgSSd2ZSBiZWVuCnRyeWluZyB0byBnZXQgdGhpcyByaWdodCwgYnV0IHNvIGZhciBpdCBzZWVt cyBsaWtlIHRoZSBsZWFzdCBiYWQgb3B0aW9uLgpJJ2xsIHNlbmQgb3V0IGEgcHJvcGVyIHBhdGNo IHdpdGggdXBkYXRlZCBjb21tZW50cyBhbmQgd2lsbCBzZWUgd2hhdApwZW9wbGUgdGhpbmsuCgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0t a2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcK aHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2Vy bmVsCg==