From patchwork Fri Jun 5 21:26:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Quinlan X-Patchwork-Id: 11590545 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CB8A71392 for ; Fri, 5 Jun 2020 21:30:17 +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 A80D52065C for ; Fri, 5 Jun 2020 21:30:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DO9Ehww2"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="dTo2j8UG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A80D52065C 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+patchwork-linux-arm=patchwork.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=RhxmIkYr5PKTLYEMG4WN1HqiUV3eGKho6N3uma9XNnc=; b=DO9Ehww2c4ev2Qs6kqWYv7nud1 yG9du/TU/4kQehTDLitpC1zMmkBVCcdnDMoGfWb1hsCMYyA140PGF6X9D35IPgIuLdV7cNS74LN72 qWdbo1t2D4dP6uDBfiZ8s1PhAxwigYokJV/MXB8LxUIi4kcwqc3x77pJBIu0PQy1z7CMwOoS7kLjs 9Mbl8WIJLP2t7x27zjRoMM6R5HhBaUXCoj8HDkLugZUftb4Z8itUFCZGKscdpfZJ/WMojK7NuO7oM cHy0XHuvMzIAEZQfqjfmAJ/tixwLHj1x+D6VuGDgSLxPzjQB3TchyMKcQIHTPPtOoEQGQ0xtv+LFr UMB3MtDA==; 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 1jhJum-00066T-KD; Fri, 05 Jun 2020 21:30:12 +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 1jhJsS-00033W-W1; Fri, 05 Jun 2020 21:27:51 +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 800B130CFDD; Fri, 5 Jun 2020 14:27:47 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 rnd-relay.smtp.broadcom.com 800B130CFDD DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1591392467; bh=AlY3xR56YhXONm3RNs9ROpeBqTOSk8xtR8Q277mQq8Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dTo2j8UG4BylLFWrf4JPj0mKG9tNXX/szjHpgXP5HTutBGi+KIDD6qVpEmIfdXbNZ 5xmEpMCAqFUCh3kpkw8QEILXTWmJJOwhXXyMMNTv7S2XKo6CDIjn2rN/Y1+Ahoz3m5 hL7h0FCkQ4xTPFP9+fblGEoS6GcZWRE3BpIHn1hw= 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 EF833140069; Fri, 5 Jun 2020 14:27:45 -0700 (PDT) From: Jim Quinlan To: linux-pci@vger.kernel.org, Christoph Hellwig , Nicolas Saenz Julienne , bcm-kernel-feedback-list@broadcom.com, james.quinlan@broadcom.com Subject: [PATCH v4 11/12] PCI: brcmstb: Set bus max burst size by chip type Date: Fri, 5 Jun 2020 17:26:51 -0400 Message-Id: <20200605212706.7361-12-james.quinlan@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200605212706.7361-1-james.quinlan@broadcom.com> References: <20200605212706.7361-1-james.quinlan@broadcom.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200605_142749_073908_2BA9F28E X-CRM114-Status: UNSURE ( 9.68 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [192.19.229.170 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender 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 , Florian Fainelli , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" , Jim Quinlan , Bjorn Helgaas , "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.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 Acked-by: Florian Fainelli --- 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 0e92d322f581..7d068cec1ae2 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 @@ -848,7 +848,7 @@ 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); @@ -864,10 +864,22 @@ 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 (pcie->type == BCM2711) + burst = 0x0; /* 128B */ + else if (pcie->type == BCM7278) + burst = 0x3; /* 512 bytes */ + else + burst = 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);