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spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 66C64400FD; Fri, 30 Jul 2021 06:09:07 +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 OZ9RGYIRf46I; Fri, 30 Jul 2021 06:09:06 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp2.osuosl.org (Postfix) with ESMTPS id 16A54400F8; Fri, 30 Jul 2021 06:09:06 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id CEFF5C001A; Fri, 30 Jul 2021 06:09:05 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 7A019C000E for ; Fri, 30 Jul 2021 06:09:04 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 68E4D60685 for ; Fri, 30 Jul 2021 06:09:04 +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 VBeYNhrXPqcq for ; Fri, 30 Jul 2021 06:09:03 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by smtp3.osuosl.org (Postfix) with ESMTPS id 39B9B600B6 for ; Fri, 30 Jul 2021 06:09:03 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10060"; a="200245455" X-IronPort-AV: E=Sophos;i="5.84,281,1620716400"; d="scan'208";a="200245455" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jul 2021 23:09:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,281,1620716400"; d="scan'208";a="465344710" Received: from allen-box.sh.intel.com (HELO [10.239.159.118]) ([10.239.159.118]) by orsmga008.jf.intel.com with ESMTP; 29 Jul 2021 23:08:57 -0700 Subject: Re: [PATCH v2 01/24] iommu: Pull IOVA cookie management into the core To: Robin Murphy , joro@8bytes.org, will@kernel.org References: From: Lu Baolu Message-ID: <19face6d-daae-fe36-5154-a1f6e409064d@linux.intel.com> Date: Fri, 30 Jul 2021 14:06:38 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: Maxime Ripard , Jean-Philippe Brucker , Heiko Stuebner , Geert Uytterhoeven , linux-kernel@vger.kernel.org, Chunyan Zhang , dianders@chromium.org, iommu@lists.linux-foundation.org, 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On 7/28/21 11:58 PM, Robin Murphy wrote: > 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: Chunyan Zhang > CC: Maxime Ripard > CC: Jean-Philippe Brucker > Signed-off-by: Robin Murphy > --- > 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..ea5a9ea8d431 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 ignore -EEXIST while drivers still get their own cookies */ > + if (type == IOMMU_DOMAIN_DMA && iommu_get_dma_cookie(domain) == -ENOMEM) { > + 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 { > Reviewed-by: Lu Baolu Best regards, baolu _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu