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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 2D13AC432BE for ; Wed, 4 Aug 2021 18:53:00 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 0B17C60F10 for ; Wed, 4 Aug 2021 18:52:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0B17C60F10 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sntech.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id BA77F6063A; Wed, 4 Aug 2021 18:52:58 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yTSOQbJY6pnM; Wed, 4 Aug 2021 18:52:57 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTPS id 6E510605B2; Wed, 4 Aug 2021 18:52:57 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 2144AC001A; Wed, 4 Aug 2021 18:52:57 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [IPv6:2605:bc80:3010::133]) by lists.linuxfoundation.org (Postfix) with ESMTP id BD995C000E for ; Wed, 4 Aug 2021 18:52:55 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id B2F8B404FF for ; Wed, 4 Aug 2021 18:52:55 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OZ5YA04h21qf for ; Wed, 4 Aug 2021 18:52:54 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) by smtp2.osuosl.org (Postfix) with ESMTPS id A378B401D2 for ; Wed, 4 Aug 2021 18:52:54 +0000 (UTC) Received: from ip5f5aa64a.dynamic.kabel-deutschland.de ([95.90.166.74] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mBM0O-0002bp-FX; Wed, 04 Aug 2021 20:52:40 +0200 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: joro@8bytes.org, will@kernel.org, Robin Murphy Subject: Re: [PATCH v3 01/25] iommu: Pull IOVA cookie management into the core Date: Wed, 04 Aug 2021 20:52:39 +0200 Message-ID: <2535689.1BCLMh4Saa@diego> In-Reply-To: <46f4cda8215bd5f8a9f9fd5a4a6451805f75efa3.1628094600.git.robin.murphy@arm.com> References: <46f4cda8215bd5f8a9f9fd5a4a6451805f75efa3.1628094600.git.robin.murphy@arm.com> MIME-Version: 1.0 Cc: Maxime Ripard , Jean-Philippe Brucker , Geert Uytterhoeven , linux-kernel@vger.kernel.org, Chunyan Zhang , dianders@chromium.org, iommu@lists.linux-foundation.org, rajatja@google.com, linux-arm-kernel@lists.infradead.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="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Am Mittwoch, 4. August 2021, 19:15:29 CEST schrieb Robin Murphy: > Now that everyone has converged on iommu-dma for IOMMU_DOMAIN_DMA > support, we can abandon the notion of drivers being responsible for the > cookie type, and consolidate all the management into the core code. > > CC: Marek Szyprowski > CC: Yoshihiro Shimoda > CC: Geert Uytterhoeven > CC: Yong Wu > CC: Heiko Stuebner > CC: Chunyan Zhang > CC: Maxime Ripard > Reviewed-by: Jean-Philippe Brucker > Reviewed-by: Lu Baolu > Signed-off-by: Robin Murphy On a Rockchip rk3288 (arm32), rk3399 (arm64) and px30 (arm64) with the graphics pipeline using the iommu Tested-by: Heiko Stuebner Heiko > > --- > > v3: Use a simpler temporary check instead of trying to be clever with > the error code > --- > drivers/iommu/iommu.c | 7 +++++++ > include/linux/iommu.h | 3 ++- > 2 files changed, 9 insertions(+), 1 deletion(-) > > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c > index f2cda9950bd5..b65fcc66ffa4 100644 > --- a/drivers/iommu/iommu.c > +++ b/drivers/iommu/iommu.c > @@ -7,6 +7,7 @@ > #define pr_fmt(fmt) "iommu: " fmt > > #include > +#include > #include > #include > #include > @@ -1946,6 +1947,11 @@ static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus, > /* Assume all sizes by default; the driver may override this later */ > domain->pgsize_bitmap = bus->iommu_ops->pgsize_bitmap; > > + /* Temporarily avoid -EEXIST while drivers still get their own cookies */ > + if (type == IOMMU_DOMAIN_DMA && !domain->iova_cookie && iommu_get_dma_cookie(domain)) { > + iommu_domain_free(domain); > + domain = NULL; > + } > return domain; > } > > @@ -1957,6 +1963,7 @@ EXPORT_SYMBOL_GPL(iommu_domain_alloc); > > void iommu_domain_free(struct iommu_domain *domain) > { > + iommu_put_dma_cookie(domain); > domain->ops->domain_free(domain); > } > EXPORT_SYMBOL_GPL(iommu_domain_free); > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > index 4997c78e2670..141779d76035 100644 > --- a/include/linux/iommu.h > +++ b/include/linux/iommu.h > @@ -40,6 +40,7 @@ struct iommu_domain; > struct notifier_block; > struct iommu_sva; > struct iommu_fault_event; > +struct iommu_dma_cookie; > > /* iommu fault flags */ > #define IOMMU_FAULT_READ 0x0 > @@ -86,7 +87,7 @@ struct iommu_domain { > iommu_fault_handler_t handler; > void *handler_token; > struct iommu_domain_geometry geometry; > - void *iova_cookie; > + struct iommu_dma_cookie *iova_cookie; > }; > > enum iommu_cap { > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu