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=-11.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 2DD72C43387 for ; Tue, 1 Jan 2019 04:52:54 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id EBA8F2075D for ; Tue, 1 Jan 2019 04:52:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="eohNg68e" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EBA8F2075D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+W3HlAgFsYsG9rOMMbe30ZJr3RFhNK3ktM2+w92aHyk=; b=eohNg68e4mZjPH cwlf1TufLL9RyaQ4dTvEUGYruqSeLVEptWGJdGZYbDvIdhA9rUAVGtN1MALePzTF2awDZpCji6bZ/ HLMd1Lw0L7H4GXAELrtSnHP8rUmASkf/0tKSDXizHa2XuKkJrspIbphX1iZFIzu7Xc4GoOBdW3Trt teTtIXg1iSMBhb04ZFZmqNUPVrWMKcAyPTfWAWz+FwYuyRXRuRdhjGwGSAbQUXJfZjzxeOx1M0NLA Ft8Nn70WQRpY5Gr3j8G55Pt6KpxLe0pV2FV1bQ3aeKcPgn6lLej4/eZ32oRrv6G+PfRK7Gj5RLpoq 2NyTNvx1a6R50ZYvS4gg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1geC2r-0002mU-J2; Tue, 01 Jan 2019 04:52:49 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1geC2G-0002Dl-5Q; Tue, 01 Jan 2019 04:52:16 +0000 X-UUID: 99391a316f84448482293b626c148373-20190101 X-UUID: 99391a316f84448482293b626c148373-20190101 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1306635633; Tue, 01 Jan 2019 12:52:07 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs03n2.mediatek.inc (172.21.101.182) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 1 Jan 2019 12:52:05 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 1 Jan 2019 12:52:04 +0800 From: Yong Wu To: Joerg Roedel , Greg Kroah-Hartman , Matthias Brugger , Rob Herring Subject: [PATCH 04/13] iommu/mediatek: Add device_link between the consumer and the larb devices Date: Tue, 1 Jan 2019 12:51:07 +0800 Message-ID: <1546318276-18993-5-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1546318276-18993-1-git-send-email-yong.wu@mediatek.com> References: <1546318276-18993-1-git-send-email-yong.wu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 706CAF65DE7F61A95F88EF0E0AA91A03FA1915A56FF44879FCD4C8307A0520812000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181231_205212_565020_06C42493 X-CRM114-Status: GOOD ( 14.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , arnd@arndb.de, srv_heupstream@mediatek.com, Will Deacon , linux-kernel@vger.kernel.org, Tomasz Figa , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, yingjoe.chen@mediatek.com, Robin Murphy , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org MediaTek IOMMU don't have its power-domain. all the consumer connect with smi-larb, then connect with smi-common. M4U | smi-common | ------------- | | ... | | larb1 larb2 | | vdec venc When the consumer works, it should enable the smi-larb's power which also need enable the smi-common's power firstly. Thus, First of all, use the device link connect the consumer and the smi-larbs. then add device link between the smi-larb and smi-common. This patch adds device_link between the consumer and the larbs. Suggested-by: Tomasz Figa Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 15 +++++++++++++-- drivers/iommu/mtk_iommu_v1.c | 14 ++++++++++++-- 2 files changed, 25 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 202e41b..735ae8d 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -247,6 +247,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data, struct mtk_smi_larb_iommu *larb_mmu; unsigned int larbid, portid; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct device_link *link; int i; for (i = 0; i < fwspec->num_ids; ++i) { @@ -257,10 +258,20 @@ static void mtk_iommu_config(struct mtk_iommu_data *data, dev_dbg(dev, "%s iommu port: %d\n", enable ? "enable" : "disable", portid); - if (enable) + if (enable) { larb_mmu->mmu |= MTK_SMI_MMU_EN(portid); - else + /* Link the consumer with the larb device(supplier) */ + link = device_link_add(dev, larb_mmu->dev, + DL_FLAG_PM_RUNTIME | + DL_FLAG_AUTOREMOVE_CONSUMER); + if (!link) { + dev_err(dev, "Unable to link %s\n", + dev_name(larb_mmu->dev)); + return; + } + } else { larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid); + } } } diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index 9386aee..022bad9 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -201,6 +201,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data, struct mtk_smi_larb_iommu *larb_mmu; unsigned int larbid, portid; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct device_link *link; int i; for (i = 0; i < fwspec->num_ids; ++i) { @@ -211,10 +212,19 @@ static void mtk_iommu_config(struct mtk_iommu_data *data, dev_dbg(dev, "%s iommu port: %d\n", enable ? "enable" : "disable", portid); - if (enable) + if (enable) { larb_mmu->mmu |= MTK_SMI_MMU_EN(portid); - else + link = device_link_add(dev, larb_mmu->dev, + DL_FLAG_PM_RUNTIME | + DL_FLAG_AUTOREMOVE_CONSUMER); + if (!link) { + dev_err(dev, "Unable to link %s\n", + dev_name(larb_mmu->dev)); + return; + } + } else { larb_mmu->mmu &= ~MTK_SMI_MMU_EN(portid); + } } } -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel