From patchwork Tue Feb 23 23:02:32 2016 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: 8402251 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B8267C0553 for ; Wed, 24 Feb 2016 07:06:59 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CBF58202E9 for ; Wed, 24 Feb 2016 07:06:58 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EF17C202E6 for ; Wed, 24 Feb 2016 07:06:57 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aYTUs-0001QL-Pb; Wed, 24 Feb 2016 07:04:30 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aYTUZ-00014X-Vi; Wed, 24 Feb 2016 07:04:14 +0000 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 129604790; Wed, 24 Feb 2016 15:03:45 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Wed, 24 Feb 2016 15:03:43 +0800 From: Yong Wu To: Joerg Roedel , Robin Murphy , Will Deacon , Matthias Brugger Subject: [PATCH 2/2] iommu/mediatek: Add 4GB mode support Date: Wed, 24 Feb 2016 07:02:32 +0800 Message-ID: <1456268552-16635-3-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1456268552-16635-1-git-send-email-yong.wu@mediatek.com> References: <1456268552-16635-1-git-send-email-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-20160223_230412_434752_0FCDF32A X-CRM114-Status: GOOD ( 17.97 ) X-Spam-Score: 0.4 (/) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pebolle@tiscali.nl, arnd@arndb.de, srv_heupstream@mediatek.com, Catalin Marinas , linux-kernel@vger.kernel.org, milton.chiang@mediatek.com, Tomasz Figa , iommu@lists.linux-foundation.org, Rob Herring , Daniel Kurtz , Yong Wu , Sasha Hauer , linux-mediatek@lists.infradead.org, youhua.li@mediatek.com, mitchelh@codeaurora.org, linux-arm-kernel@lists.infradead.org, Lucas Stach Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00, DATE_IN_PAST_06_12, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch add 4GB mode support for m4u. Signed-off-by: Yong Wu --- In this patch I use the global "max_pfn" to check whether the current dram size is over 4GB, I am not sure this is proper. If there is any other suggestions, please let me know. Thanks. drivers/iommu/mtk_iommu.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 721ffdb..5b1ddb5 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -11,6 +11,7 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ +#include #include #include #include @@ -56,7 +57,7 @@ #define F_MMU_TF_PROTECT_SEL(prot) (((prot) & 0x3) << 5) #define REG_MMU_IVRP_PADDR 0x114 -#define F_MMU_IVRP_PA_SET(pa) ((pa) >> 1) +#define F_MMU_IVRP_PA_SET(pa, ext) (((pa) >> 1) | ((!!(ext)) << 31)) #define REG_MMU_INT_CONTROL0 0x120 #define F_L2_MULIT_HIT_EN BIT(0) @@ -125,6 +126,7 @@ struct mtk_iommu_data { struct mtk_iommu_domain *m4u_dom; struct iommu_group *m4u_group; struct mtk_smi_iommu smi_imu; /* SMI larb iommu info */ + bool enable_4GB; }; static struct iommu_ops mtk_iommu_ops; @@ -257,6 +259,9 @@ static int mtk_iommu_domain_finalise(struct mtk_iommu_data *data) .iommu_dev = data->dev, }; + if (data->enable_4GB) + dom->cfg.quirks |= IO_PGTABLE_QUIRK_MTK_4GB_EXT; + dom->iop = alloc_io_pgtable_ops(ARM_V7S, &dom->cfg, data); if (!dom->iop) { dev_err(data->dev, "Failed to alloc io pgtable\n"); @@ -530,7 +535,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) F_INT_PRETETCH_TRANSATION_FIFO_FAULT; writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL); - writel_relaxed(F_MMU_IVRP_PA_SET(data->protect_base), + writel_relaxed(F_MMU_IVRP_PA_SET(data->protect_base, data->enable_4GB), data->base + REG_MMU_IVRP_PADDR); writel_relaxed(0, data->base + REG_MMU_DCM_DIS); @@ -592,6 +597,9 @@ static int mtk_iommu_probe(struct platform_device *pdev) return -ENOMEM; data->protect_base = ALIGN(virt_to_phys(protect), MTK_PROTECT_PA_ALIGN); + /* Whether the current dram size is over 4GB */ + data->enable_4GB = !!(max_pfn > (0xffffffffUL >> PAGE_SHIFT)); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); data->base = devm_ioremap_resource(dev, res); if (IS_ERR(data->base)) @@ -691,7 +699,7 @@ static int mtk_iommu_resume(struct device *dev) writel_relaxed(reg->ctrl_reg, base + REG_MMU_CTRL_REG); writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0); writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL); - writel_relaxed(F_MMU_IVRP_PA_SET(data->protect_base), + writel_relaxed(F_MMU_IVRP_PA_SET(data->protect_base, data->enable_4GB), base + REG_MMU_IVRP_PADDR); return 0; }