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=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 5F0D0C433E6 for ; Mon, 11 Jan 2021 11:24:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32428222B6 for ; Mon, 11 Jan 2021 11:24:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728670AbhAKLYj (ORCPT ); Mon, 11 Jan 2021 06:24:39 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:33662 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1729637AbhAKLYi (ORCPT ); Mon, 11 Jan 2021 06:24:38 -0500 X-UUID: b6e1ef51e15a4244b8bda8116f3737a1-20210111 X-UUID: b6e1ef51e15a4244b8bda8116f3737a1-20210111 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] 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 400351509; Mon, 11 Jan 2021 19:23:53 +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 19:23:52 +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 19:23:51 +0800 From: Yong Wu To: Joerg Roedel , Rob Herring , Matthias Brugger , Will Deacon , Robin Murphy CC: Krzysztof Kozlowski , Evan Green , Tomasz Figa , , , , , , , , , Nicolas Boichat , , Subject: [PATCH v6 29/33] iommu/mediatek: Add iova reserved function Date: Mon, 11 Jan 2021 19:19:10 +0800 Message-ID: <20210111111914.22211-30-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 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org For multiple iommu_domains, we need to reserve some iova regions. Take a example, If the default iova region is 0 ~ 4G, but the 0x4000_0000 ~ 0x43ff_ffff is only for the special CCU0 domain. Thus we should exclude this region for the default iova region. Signed-off-by: Anan sun Signed-off-by: Chao Hao Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index b42fd2535b77..764dc0b93477 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -626,6 +626,35 @@ static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) return iommu_fwspec_add_ids(dev, args->args, 1); } +static void mtk_iommu_get_resv_regions(struct device *dev, + struct list_head *head) +{ + struct mtk_iommu_data *data = dev_iommu_priv_get(dev); + unsigned int domid = mtk_iommu_get_domain_id(dev, data->plat_data), i; + const struct mtk_iommu_iova_region *resv, *curdom; + struct iommu_resv_region *region; + int prot = IOMMU_WRITE | IOMMU_READ; + + if (domid < 0) + return; + curdom = data->plat_data->iova_region + domid; + for (i = 0; i < data->plat_data->iova_region_nr; i++) { + resv = data->plat_data->iova_region + i; + + /* Only reserve when the region is inside the current domain */ + if (resv->iova_base <= curdom->iova_base || + resv->iova_base + resv->size >= curdom->iova_base + curdom->size) + continue; + + region = iommu_alloc_resv_region(resv->iova_base, resv->size, + prot, IOMMU_RESV_RESERVED); + if (!region) + return; + + list_add_tail(®ion->list, head); + } +} + static const struct iommu_ops mtk_iommu_ops = { .domain_alloc = mtk_iommu_domain_alloc, .domain_free = mtk_iommu_domain_free, @@ -641,6 +670,8 @@ static const struct iommu_ops mtk_iommu_ops = { .release_device = mtk_iommu_release_device, .device_group = mtk_iommu_device_group, .of_xlate = mtk_iommu_of_xlate, + .get_resv_regions = mtk_iommu_get_resv_regions, + .put_resv_regions = generic_iommu_put_resv_regions, .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M, }; -- 2.18.0