From patchwork Wed Nov 11 12:38:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WW9uZyBXdSAo5ZC05YuHKQ==?= X-Patchwork-Id: 323082 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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 EA3D4C55ABD for ; Wed, 11 Nov 2020 12:41:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9CD6920679 for ; Wed, 11 Nov 2020 12:41:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726392AbgKKMl2 (ORCPT ); Wed, 11 Nov 2020 07:41:28 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:58242 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726897AbgKKMlV (ORCPT ); Wed, 11 Nov 2020 07:41:21 -0500 X-UUID: 4946802b89d74c5cacccc267b9fa8a40-20201111 X-UUID: 4946802b89d74c5cacccc267b9fa8a40-20201111 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw02.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 1519778830; Wed, 11 Nov 2020 20:41:18 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 11 Nov 2020 20:41:16 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 11 Nov 2020 20:41:15 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Rob Herring , Will Deacon , Robin Murphy CC: Krzysztof Kozlowski , Evan Green , Tomasz Figa , , , , , , , , , Nicolas Boichat , , , Greg Kroah-Hartman , Subject: [PATCH v4 16/24] iommu/mediatek: Add iova reserved function Date: Wed, 11 Nov 2020 20:38:30 +0800 Message-ID: <20201111123838.15682-17-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20201111123838.15682-1-yong.wu@mediatek.com> References: <20201111123838.15682-1-yong.wu@mediatek.com> MIME-Version: 1.0 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. This patch adds iova reserved flow. It's a preparing patch for supporting multi-domain. Signed-off-by: Anan sun Signed-off-by: Chao Hao Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 28 ++++++++++++++++++++++++++++ drivers/iommu/mtk_iommu.h | 5 +++++ 2 files changed, 33 insertions(+) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 90aae34f4da0..bf3f4e0f4748 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -156,6 +156,11 @@ static LIST_HEAD(m4ulist); /* List all the M4U HWs */ #define for_each_m4u(data) list_for_each_entry(data, &m4ulist, list) +struct mtk_iommu_iova_region { + dma_addr_t iova_base; + unsigned long long size; +}; + /* * There may be 1 or 2 M4U HWs, But we always expect they are in the same domain * for the performance. @@ -544,6 +549,27 @@ 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); + const struct mtk_iommu_iova_region *resv; + struct iommu_resv_region *region; + int prot = IOMMU_WRITE | IOMMU_READ; + unsigned int i; + + for (i = 0; i < data->plat_data->iova_region_nr; i++) { + resv = data->plat_data->iova_region + i; + + 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, @@ -558,6 +584,8 @@ 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, }; diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index 5e03a029c4dc..e867cd3aeeac 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -45,10 +45,15 @@ enum mtk_iommu_plat { M4U_MT8183, }; +struct mtk_iommu_iova_region; + struct mtk_iommu_plat_data { enum mtk_iommu_plat m4u_plat; u32 flags; u32 inv_sel_reg; + + unsigned int iova_region_nr; + const struct mtk_iommu_iova_region *iova_region; unsigned char larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX]; };