From patchwork Fri Feb 1 05:36:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Honghui Zhang X-Patchwork-Id: 10791823 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 727376C2 for ; Fri, 1 Feb 2019 05:36:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 62AA731A84 for ; Fri, 1 Feb 2019 05:36:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5683F31D4E; Fri, 1 Feb 2019 05:36:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 05D0331A84 for ; Fri, 1 Feb 2019 05:36:36 +0000 (UTC) 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=7/L1/wxHRGRvoYYZDIu2Vm7YoX2dMA0WrYSYgDm3I/w=; b=B60oltIcPJ8xUW haSmpY6RDk63JayVHKg9qz//nVvsK4WUrNXE2EMTy2HVQwecgI/yl9nLhA7c8k/+pD00C9E1g62d7 eSEXIJDtvGfeaYrOlTbBs2TxUohUuSBkg1S+VSPx7TyNFoJDoCzL9RzzHD2KTKMO1iCmbMlEQQq9m KlF84p8EPqreK0BdaVdEe4GGIRaKsiF93OljFzs7jbvkkN40ko/E+bXcFFV0S5V/yqBkHa5k5LtPl YzhsJGGpTIrImW53AJoj/McyW7jOlEDcEHBduGxsv/QSYTFOZWMvjSrn6M6pOeUdH990lt9CWufgr 7yXI2FIMNsbx0mM7k7kA==; 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 1gpRVC-0004dr-07; Fri, 01 Feb 2019 05:36:34 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gpRUu-0004Ny-Kr; Fri, 01 Feb 2019 05:36:18 +0000 X-UUID: d5b99feb1bba4cd2b1b2907f6dfbaceb-20190131 X-UUID: d5b99feb1bba4cd2b1b2907f6dfbaceb-20190131 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 971059362; Thu, 31 Jan 2019 21:36:13 -0800 Received: from mtkmbs08n1.mediatek.inc (172.21.101.55) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 31 Jan 2019 21:36:12 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 1 Feb 2019 13:36:11 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 1 Feb 2019 13:36:11 +0800 From: To: , , , , , , Subject: [PATCH v3 2/2] PCI: mediatek: Enlarge PCIe2AHB window size to support 4GB DRAM Date: Fri, 1 Feb 2019 13:36:07 +0800 Message-ID: <1548999367-11733-3-git-send-email-honghui.zhang@mediatek.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1548999367-11733-1-git-send-email-honghui.zhang@mediatek.com> References: <1548999367-11733-1-git-send-email-honghui.zhang@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-20190131_213616_685558_B3C8F344 X-CRM114-Status: UNSURE ( 8.64 ) X-CRM114-Notice: Please train this message. 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, poza@codeaurora.org, fred@fredlawl.com, rafael.j.wysocki@intel.com, jianjun.wang@mediatek.com, Honghui Zhang Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Honghui Zhang The PCIE_AXI_WINDOW0 defines the translate window size for the request from EP side. Request outside of this window will be treated as unsupported request. Enlarge this window size from fls(0xffffffff) to 2^33 to support 8GB translate address range then EP DMA is capable of fully access 4GB DRAM range(physical DRAM is start from 0x40000000). Reported-by: Bjorn Helgaas Signed-off-by: Honghui Zhang --- drivers/pci/controller/pcie-mediatek.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c index c42fe5c..0b6c728 100644 --- a/drivers/pci/controller/pcie-mediatek.c +++ b/drivers/pci/controller/pcie-mediatek.c @@ -90,6 +90,12 @@ #define AHB2PCIE_SIZE(x) ((x) & GENMASK(4, 0)) #define PCIE_AXI_WINDOW0 0x448 #define WIN_ENABLE BIT(7) +/* + * Define PCIe to AHB window size as 2^33 to support max 8GB address space + * translate, support least 4GB DRAM size access from EP DMA(physical DRAM + * start from 0x40000000). + */ +#define PCIE2AHB_SIZE 0x21 /* PCIe V2 configuration transaction header */ #define PCIE_CFG_HEADER0 0x460 @@ -713,7 +719,7 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port) writel(val, port->base + PCIE_AHB_TRANS_BASE0_H); /* Set PCIe to AXI translation memory space.*/ - val = fls(0xffffffff) | WIN_ENABLE; + val = PCIE2AHB_SIZE | WIN_ENABLE; writel(val, port->base + PCIE_AXI_WINDOW0); return 0;