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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 7DADEC433E0 for ; Mon, 11 Jan 2021 11:23:44 +0000 (UTC) Received: from silver.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 302292220F for ; Mon, 11 Jan 2021 11:23:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 302292220F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.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 silver.osuosl.org (Postfix) with ESMTP id CDB3C20C41; Mon, 11 Jan 2021 11:23:43 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9AkV3flp3KcD; Mon, 11 Jan 2021 11:23:42 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 177B3214E6; Mon, 11 Jan 2021 11:23:42 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 04FDBC0893; Mon, 11 Jan 2021 11:23:42 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 083D8C013A for ; Mon, 11 Jan 2021 11:23:41 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id EC14385F19 for ; Mon, 11 Jan 2021 11:23:40 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LwFkCX_BRROG for ; Mon, 11 Jan 2021 11:23:40 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mailgw01.mediatek.com (unknown [210.61.82.183]) by fraxinus.osuosl.org (Postfix) with ESMTP id 2183685F0A for ; Mon, 11 Jan 2021 11:23:39 +0000 (UTC) X-UUID: 47bfbcef09be4534bfd2b8fb72d7e07a-20210111 X-UUID: 47bfbcef09be4534bfd2b8fb72d7e07a-20210111 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 261536895; Mon, 11 Jan 2021 19:23:37 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 11 Jan 2021 19:23:36 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 11 Jan 2021 19:23:35 +0800 From: Yong Wu To: Joerg Roedel , Rob Herring , Matthias Brugger , Will Deacon , Robin Murphy Subject: [PATCH v6 27/33] iommu/mediatek: Add get_domain_id from dev->dma_range_map Date: Mon, 11 Jan 2021 19:19:08 +0800 Message-ID: <20210111111914.22211-28-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210111111914.22211-1-yong.wu@mediatek.com> References: <20210111111914.22211-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , srv_heupstream@mediatek.com, chao.hao@mediatek.com, linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, Krzysztof Kozlowski , anan.sun@mediatek.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" Add a new interface _get_domain_id from dev->dma_range_map, The iommu consumer device will use dma-ranges in dtsi node to indicate its dma address region requirement. In this iommu driver, we will get the requirement and decide which iova domain it should locate. In the lastest SoC, there will be several iova-regions(domains), we will compare and calculate which domain is right. If the start/end of device requirement equal some region. it is best fit of course. If it is inside some region, it is also ok. the iova requirement of a device should not be inside two or more regions. Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 42 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 6875ca1225f0..8fc17158bc28 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -314,6 +315,36 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) return IRQ_HANDLED; } +static int mtk_iommu_get_domain_id(struct device *dev, + const struct mtk_iommu_plat_data *plat_data) +{ + const struct mtk_iommu_iova_region *rgn = plat_data->iova_region; + const struct bus_dma_region *dma_rgn = dev->dma_range_map; + int i, candidate = -1; + dma_addr_t dma_end; + + if (!dma_rgn || plat_data->iova_region_nr == 1) + return 0; + + dma_end = dma_rgn->dma_start + dma_rgn->size - 1; + for (i = 0; i < plat_data->iova_region_nr; i++, rgn++) { + /* Best fit. */ + if (dma_rgn->dma_start == rgn->iova_base && + dma_end == rgn->iova_base + rgn->size - 1) + return i; + /* ok if it is inside this region. */ + if (dma_rgn->dma_start >= rgn->iova_base && + dma_end < rgn->iova_base + rgn->size) + candidate = i; + } + + if (candidate >= 0) + return candidate; + dev_err(dev, "Can NOT find the iommu domain id(%pad 0x%llx).\n", + &dma_rgn->dma_start, dma_rgn->size); + return -EINVAL; +} + static void mtk_iommu_config(struct mtk_iommu_data *data, struct device *dev, bool enable) { @@ -400,11 +431,15 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, struct mtk_iommu_data *data = dev_iommu_priv_get(dev); struct mtk_iommu_domain *dom = to_mtk_domain(domain); struct device *m4udev = data->dev; - int ret; + int ret, domid; if (!data) return -ENODEV; + domid = mtk_iommu_get_domain_id(dev, data->plat_data); + if (domid < 0) + return domid; + if (!dom->data) { if (mtk_iommu_domain_finalise(dom, data)) return -ENODEV; @@ -534,10 +569,15 @@ static void mtk_iommu_release_device(struct device *dev) static struct iommu_group *mtk_iommu_device_group(struct device *dev) { struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); + int domid; if (!data) return ERR_PTR(-ENODEV); + domid = mtk_iommu_get_domain_id(dev, data->plat_data); + if (domid < 0) + return ERR_PTR(domid); + /* All the client devices are in the same m4u iommu-group */ if (!data->m4u_group) { data->m4u_group = iommu_group_alloc(); -- 2.18.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu