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=-14.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 705ACC4338F for ; Wed, 4 Aug 2021 18:54:13 +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 17CF360F41 for ; Wed, 4 Aug 2021 18:54:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 17CF360F41 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sntech.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Z+PuUT42FQ/B1d3HiMJ0gZWuyESfWRMA2oilix0WR/U=; b=EbxNxnAsoWAscH cN3/vWzaRt0orQ3spf2wEzzvEKB43byFWctktwkaonMvVdP57ROOFBPKWpzhQnq2f1lyj3Ywc6zti TQANMe+J3vXdLdVfDsVVX7PzCLIcy3Z+HCMjm72kLUYQUIWsv4l84tMnP+1xuxdTJAO0bWHHyd1fR Xk7iEaGsRNpyT0VsnQAsO126H1cGZPPFjX2BxJaJlt5M9QfVaDDKhNnPHFHqkRwoVc6GFf1EKHB4A MSIvlL98cmaiARLoeXhuVx7vgwz9K5AB7tJUvd9IEPsWvm4eonaxhIzPfOhG151ReT6oUSEjmONZ6 xbmNGjuyG04/lBuwGvGw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mBM0g-007E7H-RY; Wed, 04 Aug 2021 18:52:58 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mBM0c-007E6e-UL for linux-arm-kernel@lists.infradead.org; Wed, 04 Aug 2021 18:52:56 +0000 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 Cc: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, suravee.suthikulpanit@amd.com, baolu.lu@linux.intel.com, john.garry@huawei.com, dianders@chromium.org, rajatja@google.com, chenxiang66@hisilicon.com, Marek Szyprowski , Yoshihiro Shimoda , Geert Uytterhoeven , Yong Wu , Chunyan Zhang , Maxime Ripard , Jean-Philippe Brucker 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210804_115255_037642_299A070D X-CRM114-Status: GOOD ( 22.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 { > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel