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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,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 97C41C282DD for ; Mon, 10 Jun 2019 12:26:39 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 7729620820 for ; Mon, 10 Jun 2019 12:26:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7729620820 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 5F1AAC4E; Mon, 10 Jun 2019 12:26:39 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 8A828C4E for ; Mon, 10 Jun 2019 12:26:38 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from mailgw01.mediatek.com (unknown [210.61.82.183]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id B5A4C76F for ; Mon, 10 Jun 2019 12:26:37 +0000 (UTC) X-UUID: dc6223ec725d4466b98e191d5e207052-20190610 X-UUID: dc6223ec725d4466b98e191d5e207052-20190610 Received: from mtkcas07.mediatek.inc [(172.21.101.84)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 858344451; Mon, 10 Jun 2019 20:21:29 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 10 Jun 2019 20:21:28 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 10 Jun 2019 20:21:27 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Robin Murphy , Rob Herring Subject: [PATCH v7 16/21] memory: mtk-smi: Add bus_sel for mt8183 Date: Mon, 10 Jun 2019 20:17:55 +0800 Message-ID: <1560169080-27134-17-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1560169080-27134-1-git-send-email-yong.wu@mediatek.com> References: <1560169080-27134-1-git-send-email-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , srv_heupstream@mediatek.com, Will Deacon , linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, Matthias Kaehlcke , linux-mediatek@lists.infradead.org, yingjoe.chen@mediatek.com, anan.sun@mediatek.com, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org There are 2 mmu cells in a M4U HW. we could adjust some larbs entering mmu0 or mmu1 to balance the bandwidth via the smi-common register SMI_BUS_SEL(0x220)(Each larb occupy 2 bits). In mt8183, For better performance, we switch larb1/2/5/7 to enter mmu1 while the others still keep enter mmu0. In mt8173 and mt2712, we don't get the performance issue, Keep its default value(0x0), that means all the larbs enter mmu0. Note: smi gen1(mt2701/mt7623) don't have this bus_sel. And, the base of smi-common is completely different with smi_ao_base of gen1, thus I add new variable for that. CC: Matthias Brugger Signed-off-by: Yong Wu Reviewed-by: Evan Green --- drivers/memory/mtk-smi.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index 9790801..08cf40d 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -49,6 +49,12 @@ #define SMI_LARB_NONSEC_CON(id) (0x380 + ((id) * 4)) #define F_MMU_EN BIT(0) +/* SMI COMMON */ +#define SMI_BUS_SEL 0x220 +#define SMI_BUS_LARB_SHIFT(larbid) ((larbid) << 1) +/* All are MMU0 defaultly. Only specialize mmu1 here. */ +#define F_MMU1_LARB(larbid) (0x1 << SMI_BUS_LARB_SHIFT(larbid)) + enum mtk_smi_gen { MTK_SMI_GEN1, MTK_SMI_GEN2 @@ -57,6 +63,7 @@ enum mtk_smi_gen { struct mtk_smi_common_plat { enum mtk_smi_gen gen; bool has_gals; + u32 bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */ }; struct mtk_smi_larb_gen { @@ -72,8 +79,8 @@ struct mtk_smi { struct clk *clk_apb, *clk_smi; struct clk *clk_gals0, *clk_gals1; struct clk *clk_async; /*only needed by mt2701*/ - void __iomem *smi_ao_base; - + void __iomem *smi_ao_base; /* only for gen1 */ + void __iomem *base; /* only for gen2 */ const struct mtk_smi_common_plat *plat; }; @@ -410,6 +417,8 @@ static int __maybe_unused mtk_smi_larb_suspend(struct device *dev) static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = { .gen = MTK_SMI_GEN2, .has_gals = true, + .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) | + F_MMU1_LARB(7), }; static const struct of_device_id mtk_smi_common_of_ids[] = { @@ -482,6 +491,11 @@ static int mtk_smi_common_probe(struct platform_device *pdev) ret = clk_prepare_enable(common->clk_async); if (ret) return ret; + } else { + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + common->base = devm_ioremap_resource(dev, res); + if (IS_ERR(common->base)) + return PTR_ERR(common->base); } pm_runtime_enable(dev); platform_set_drvdata(pdev, common); @@ -497,6 +511,7 @@ static int mtk_smi_common_remove(struct platform_device *pdev) static int __maybe_unused mtk_smi_common_resume(struct device *dev) { struct mtk_smi *common = dev_get_drvdata(dev); + u32 bus_sel = common->plat->bus_sel; int ret; ret = mtk_smi_clk_enable(common); @@ -504,6 +519,9 @@ static int __maybe_unused mtk_smi_common_resume(struct device *dev) dev_err(common->dev, "Failed to enable clock(%d).\n", ret); return ret; } + + if (common->plat->gen == MTK_SMI_GEN2 && bus_sel) + writel(bus_sel, common->base + SMI_BUS_SEL); return 0; } -- 1.9.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu