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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 BCB50C433E0 for ; Tue, 19 May 2020 20:37:19 +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 7F8EB207C4 for ; Tue, 19 May 2020 20:37:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="j7JJFu4y"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="qRVjK3qy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7F8EB207C4 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=broadcom.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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=59aFSurYEdqpSaiKDoYElduhnbkhqEcMh7LPIbP40Vc=; b=j7JJFu4yLOQpca78AWfqUg9K8i eyAYAQuZDZ6g3LsQCJesjvNpyIdbSj0OpP0DcXIpXas8x5ma8IFJxrMowmlsHuQ5JCL0QfQWsZii1 FGAfQ7yqQ3YmElbufWQCsdiDNMhGruVzcYAj0hF1jvyjiRdsxhtO3BZNiBht+W0UV+gCmPdsmHCB+ t55d2Ia7mL5XwtJcdCsLRZ1QwMucFkkzNhdmqtKfpQLx4xZTjNmm0onHnWoNSEpe/zlwf+W2CY1Yl Y0f7amqLAvOS1c9cT9/r5tF9HOQu4CMoNNsWh2c5w8hCah0h5cRBYwvKFGXj8WSaWK9qu4AUs526T 2o/ATRXg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jb8zE-0003tv-SW; Tue, 19 May 2020 20:37:16 +0000 Received: from rnd-relay.smtp.broadcom.com ([192.19.229.170]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jb8xC-0000iv-KQ; Tue, 19 May 2020 20:35:12 +0000 Received: from mail-irv-17.broadcom.com (mail-irv-17.lvn.broadcom.net [10.75.242.48]) by rnd-relay.smtp.broadcom.com (Postfix) with ESMTP id 899F130D85A; Tue, 19 May 2020 13:33:45 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 rnd-relay.smtp.broadcom.com 899F130D85A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1589920425; bh=KNHZZXTwwJMPWpvTATnyRar79T3FUVslG7xZeIt966A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qRVjK3qyeoQZ+4PRxEXZdtasJG903jg4VMZsuOYkaU1s1x/xTN4rqAGsJUBevWzRw rJbidZVmDMGh9IWTZcXCH7lhis6jKyiSeMX6CKdOAOsr5UOmUjHM8zgzJmTQESANEG fww6h9SVwk6HBwigrnmXGAYVNzwBt3HHbnuc5K64= Received: from stbsrv-and-01.and.broadcom.net (stbsrv-and-01.and.broadcom.net [10.28.16.211]) by mail-irv-17.broadcom.com (Postfix) with ESMTP id B4FF714075A; Tue, 19 May 2020 13:35:06 -0700 (PDT) From: Jim Quinlan To: james.quinlan@broadcom.com, Nicolas Saenz Julienne Subject: [PATCH 14/15] PCI: brcmstb: Set bus max burst side by chip type Date: Tue, 19 May 2020 16:34:12 -0400 Message-Id: <20200519203419.12369-15-james.quinlan@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200519203419.12369-1-james.quinlan@broadcom.com> References: <20200519203419.12369-1-james.quinlan@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200519_133510_996331_8C41122C X-CRM114-Status: GOOD ( 10.39 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Lorenzo Pieralisi , "open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS" , open list , Florian Fainelli , "maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE" , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" , Jim Quinlan , Bjorn Helgaas , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" MIME-Version: 1.0 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 From: Jim Quinlan The proper value of the parameter SCB_MAX_BURST_SIZE varies per chip. The 2711 family requires 128B whereas other devices can employ 512. The assignment is complicated by the fact that the values for this two-bit field have different meanings; Value Type_Generic Type_7278 00 Reserved 128B 01 128B 256B 10 256B 512B 11 512B Reserved Signed-off-by: Jim Quinlan --- drivers/pci/controller/pcie-brcmstb.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 7bf945efd71b..0dfa1bbd9764 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -53,7 +53,7 @@ #define PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK 0x1000 #define PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK 0x2000 #define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK 0x300000 -#define PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_128 0x0 + #define PCIE_MISC_MISC_CTRL_SCB0_SIZE_MASK 0xf8000000 #define PCIE_MISC_MISC_CTRL_SCB1_SIZE_MASK 0x07c00000 #define PCIE_MISC_MISC_CTRL_SCB2_SIZE_MASK 0x0000001f @@ -276,6 +276,7 @@ struct brcm_pcie { int num_memc; u64 memc_size[PCIE_BRCM_MAX_MEMC]; u32 hw_rev; + const struct of_device_id *of_id; }; /* @@ -841,7 +842,7 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) int num_out_wins = 0; u16 nlw, cls, lnksta; int i, ret, memc; - u32 tmp, aspm_support; + u32 tmp, burst, aspm_support; /* Reset the bridge */ brcm_pcie_bridge_sw_init_set(pcie, 1); @@ -857,10 +858,20 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) /* Wait for SerDes to be stable */ usleep_range(100, 200); + /* + * SCB_MAX_BURST_SIZE is a two bit field. For GENERIC chips it + * is encoded as 0=128, 1=256, 2=512, 3=Rsvd, for BCM7278 it + * is encoded as 0=Rsvd, 1=128, 2=256, 3=512. + */ + if (strcmp(pcie->of_id->compatible, "brcm,bcm2711-pcie") == 0) + burst = 0x0; /* 128B */ + else + burst = (pcie->type == BCM7278) ? 0x3 : 0x2; /* 512 bytes */ + /* Set SCB_MAX_BURST_SIZE, CFG_READ_UR_MODE, SCB_ACCESS_EN */ u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_SCB_ACCESS_EN_MASK); u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_CFG_READ_UR_MODE_MASK); - u32p_replace_bits(&tmp, PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_128, + u32p_replace_bits(&tmp, burst, PCIE_MISC_MISC_CTRL_MAX_BURST_SIZE_MASK); writel(tmp, base + PCIE_MISC_MISC_CTRL); @@ -1200,6 +1211,7 @@ static int brcm_pcie_probe(struct platform_device *pdev) pcie->reg_offsets = data->offsets; pcie->reg_field_info = data->reg_field_info; pcie->type = data->type; + pcie->of_id = of_id; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); pcie->base = devm_ioremap_resource(&pdev->dev, res); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel