From patchwork Wed Jun 30 02:35:02 2021 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: 468843 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=-16.8 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 473E5C11F67 for ; Wed, 30 Jun 2021 02:38:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3066D61D92 for ; Wed, 30 Jun 2021 02:38:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233519AbhF3Ckq (ORCPT ); Tue, 29 Jun 2021 22:40:46 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:35639 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S233633AbhF3Cko (ORCPT ); Tue, 29 Jun 2021 22:40:44 -0400 X-UUID: 149650664beb4b3985e8152c5f1bfa12-20210630 X-UUID: 149650664beb4b3985e8152c5f1bfa12-20210630 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1393214573; Wed, 30 Jun 2021 10:38:13 +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; Wed, 30 Jun 2021 10:38:11 +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; Wed, 30 Jun 2021 10:38:10 +0800 From: Yong Wu To: Joerg Roedel , Rob Herring , Matthias Brugger , Will Deacon , Robin Murphy CC: Krzysztof Kozlowski , Evan Green , Tomasz Figa , Tomasz Figa , , , , , , , , , Nicolas Boichat , , Subject: [PATCH 22/24] iommu/mediatek: Get the proper bankid for multi banks Date: Wed, 30 Jun 2021 10:35:02 +0800 Message-ID: <20210630023504.18177-23-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210630023504.18177-1-yong.wu@mediatek.com> References: <20210630023504.18177-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org We preassign some portes in a special bank via the new defined bank_portmsk. If the iommu id in the iommu consumer's dtsi node is inside this bank_portmsk, then we switch it to this special iommu bank, and initialise the IOMMU bank HW. Each a bank has the independent pgtable(4GB iova range). Each a bank is a independent iommu domain/group. Currently we don't separate different iova ranges inside a bank. Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 38 +++++++++++++++++++++++++++++++++++--- drivers/iommu/mtk_iommu.h | 1 + 2 files changed, 36 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 8137cfc9c8b9..e297a50adced 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -344,6 +344,30 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) return IRQ_HANDLED; } +static unsigned int mtk_iommu_get_bank_id(struct device *dev, + const struct mtk_iommu_plat_data *plat_data) +{ + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + unsigned int i, portmsk = 0, bankid = 0; /* bank default is 0 */ + + if (plat_data->bank_nr == 1) + return bankid; + + for (i = 0; i < fwspec->num_ids; i++) + portmsk |= BIT(MTK_M4U_TO_PORT(fwspec->ids[i])); + + for (i = 0; i < plat_data->bank_nr; i++) { + if (!plat_data->bank_enable[i]) + continue; + + if (portmsk & plat_data->bank_portmsk[i]) { + bankid = i; + break; + } + } + return bankid; +} + static int mtk_iommu_get_iova_region_id(struct device *dev, const struct mtk_iommu_plat_data *plat_data) { @@ -509,13 +533,14 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, struct mtk_iommu_domain *dom = to_mtk_domain(domain); struct mtk_iommu_bank_data *bank; struct device *m4udev = data->dev; - unsigned int bankid = 0; + unsigned int bankid; int ret, region_id; region_id = mtk_iommu_get_iova_region_id(dev, data->plat_data); if (region_id < 0) return region_id; + bankid = mtk_iommu_get_bank_id(dev, data->plat_data); bank = &data->bank[bankid]; if (!dom->bank) { if (mtk_iommu_domain_finalise(dom, data, region_id)) @@ -644,6 +669,7 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev) struct mtk_iommu_data *c_data = dev_iommu_priv_get(dev), *data; struct list_head *hw_list = c_data->hw_list; struct iommu_group *group; + unsigned int bankid, groupid; int regionid; data = mtk_iommu_get_frst_data(hw_list); @@ -653,12 +679,18 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev) regionid = mtk_iommu_get_iova_region_id(dev, data->plat_data); if (regionid < 0) return ERR_PTR(regionid); + bankid = mtk_iommu_get_bank_id(dev, data->plat_data); - group = data->m4u_group[regionid]; + /* + * If the bank function is enabled, each a bank is a iommu group/domain. + * otherwise, each a iova region is a iommu group/domain. + */ + groupid = bankid ? bankid : regionid; + group = data->m4u_group[groupid]; if (!group) { group = iommu_group_alloc(); if (!IS_ERR(group)) - data->m4u_group[regionid] = group; + data->m4u_group[groupid] = group; } else { iommu_group_ref_get(group); } diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index 78d9481d67b5..8235957f1592 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -65,6 +65,7 @@ struct mtk_iommu_plat_data { u32 bank_nr; bool bank_enable[MTK_IOMMU_BANK_MAX]; + unsigned int bank_portmsk[MTK_IOMMU_BANK_MAX]; unsigned char larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX]; };