From patchwork Mon Apr 17 07:36:01 2023 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: 13213392 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9923BC77B72 for ; Mon, 17 Apr 2023 07:38:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=w+yCxwQaxxI46AqSab78e19Fw6vhrPWxi1ERkuhNx40=; b=Npd36oqCXFNprh EbwWUriSlGjd0HF4E5d//uFUpuVMxRIq+gVU04rfD6P4dYTwEZCsGeZ2CrcA/Mrf12yWsZnKnZFZN YaUXOoVlQJKmnsaNkk1qQoPsTPz59nknm1yxRI1yT2+cvQvLxTzMWLIreL6nUEhdVWbC7Ky6n7j0a 7sH1OmtCWXq3BMTwsJkZaosRrf2VU5esp4zPHRVq3UN9qsKfZT5ijeJheVHAGe2yU/wYRnu0i+uKo uvDXcmqYM3u7hs6CqXxCCJmdjaG/XDSJa3ZPfpSMHcioh7HXPiApvX2QjxNJipzXL0qv8zwdxRttU RUrcvDDpI9YcAA93SzWQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1poJQV-00FCTL-2N; Mon, 17 Apr 2023 07:37:27 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1poJQS-00FCPe-0R; Mon, 17 Apr 2023 07:37:25 +0000 X-UUID: acad9b0adcf211ed8687db9d93187ff1-20230417 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=FPcoXCoNcP+b2FdYzMchlIGbMO6MtADMk5DJwKWIjDU=; b=U3UDT7O6SaxNkWt4S5Yy2fWUsXfc4oYhT7UvMZAXYMwDUC+//R3c4NQbsl8rFoGi9NODCGNdFRW3ykLlly15zsLEbtgdbdxr97tb1osg2sDaa8xex1f05WowGkc7o2JY8vlfl24h5QYRuQeh7eaex50AIpa7hWL2TwVwbWvdtg0=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.22,REQID:55478a21-f5b9-41bf-bd30-6b5f98eab042,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:95 X-CID-INFO: VERSION:1.1.22,REQID:55478a21-f5b9-41bf-bd30-6b5f98eab042,IP:0,URL :0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTION :quarantine,TS:95 X-CID-META: VersionHash:120426c,CLOUDID:718291a1-8fcb-430b-954a-ba3f00fa94a5,B ulkID:230417153653CPHI4FVC,BulkQuantity:2,Recheck:0,SF:38|29|28|17|19|48,T C:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil,Bulk:40,QS:nil,BEC:nil,COL:0, OSI:0,OSA:0,AV:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-UUID: acad9b0adcf211ed8687db9d93187ff1-20230417 Received: from mtkmbs13n1.mediatek.inc [(172.21.101.193)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 819874094; Mon, 17 Apr 2023 00:37:15 -0700 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Mon, 17 Apr 2023 15:36:51 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.25 via Frontend Transport; Mon, 17 Apr 2023 15:36:51 +0800 From: Yong Wu To: Joerg Roedel , Will Deacon , Rob Herring , Matthias Brugger CC: Robin Murphy , Krzysztof Kozlowski , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , , Subject: [PATCH v10 2/7] iommu/mediatek: Fix two IOMMU share pagetable issue Date: Mon, 17 Apr 2023 15:36:01 +0800 Message-ID: <20230417073606.25729-3-yong.wu@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230417073606.25729-1-yong.wu@mediatek.com> References: <20230417073606.25729-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230417_003724_184608_7000FE8D X-CRM114-Status: GOOD ( 18.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "Chengci.Xu" Prepare for mt8188 to fix a two IOMMU HWs share pagetable issue. We have two MM IOMMU HWs in mt8188, one is VPP-IOMMU, the other is VDO-IOMMU. The 2 MM IOMMU HWs share pagetable don't work in this case: a) VPP-IOMMU probe firstly. b) VDO-IOMMU probe. c) The master for VDO-IOMMU probe (means frstdata is vpp-iommu). d) The master in another domain probe. No matter it is vdo or vpp. Then it still create a new pagetable in step d). The problem is "frstdata->bank[0]->m4u_dom" was not initialized. Then when d) enter, it still create a new one. In this patch, we create a new variable "share_dom" for this share pgtable case, it should be helpful for readable. and put all the share pgtable logic in the mtk_iommu_domain_finalise. In mt8195, the master of VPP-IOMMU probes before than VDO-IOMMU from its dtsi node sequence, we don't see this issue in it. Prepare for mt8188. Fixes: 645b87c190c9 ("iommu/mediatek: Fix 2 HW sharing pgtable issue") Signed-off-by: Chengci.Xu Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index f58b970dccf2..4eb6742ec5f9 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -258,6 +258,8 @@ struct mtk_iommu_data { struct device *smicomm_dev; struct mtk_iommu_bank_data *bank; + struct mtk_iommu_domain *share_dom; /* For 2 HWs share pgtable */ + struct regmap *pericfg; struct mutex mutex; /* Protect m4u_group/m4u_dom above */ @@ -620,15 +622,14 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom, struct mtk_iommu_data *data, unsigned int region_id) { + struct mtk_iommu_domain *share_dom = data->share_dom; const struct mtk_iommu_iova_region *region; - struct mtk_iommu_domain *m4u_dom; - - /* Always use bank0 in sharing pgtable case */ - m4u_dom = data->bank[0].m4u_dom; - if (m4u_dom) { - dom->iop = m4u_dom->iop; - dom->cfg = m4u_dom->cfg; - dom->domain.pgsize_bitmap = m4u_dom->cfg.pgsize_bitmap; + + /* Always use share domain in sharing pgtable case */ + if (MTK_IOMMU_HAS_FLAG(data->plat_data, SHARE_PGTABLE) && share_dom) { + dom->iop = share_dom->iop; + dom->cfg = share_dom->cfg; + dom->domain.pgsize_bitmap = share_dom->cfg.pgsize_bitmap; goto update_iova_region; } @@ -658,6 +659,9 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_domain *dom, /* Update our support page sizes bitmap */ dom->domain.pgsize_bitmap = dom->cfg.pgsize_bitmap; + if (MTK_IOMMU_HAS_FLAG(data->plat_data, SHARE_PGTABLE)) + data->share_dom = dom; + update_iova_region: /* Update the iova region for this domain */ region = data->plat_data->iova_region + region_id; @@ -708,7 +712,9 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain, /* Data is in the frstdata in sharing pgtable case. */ frstdata = mtk_iommu_get_frst_data(hw_list); + mutex_lock(&frstdata->mutex); ret = mtk_iommu_domain_finalise(dom, frstdata, region_id); + mutex_unlock(&frstdata->mutex); if (ret) { mutex_unlock(&dom->mutex); return ret;