From patchwork Thu Dec 9 21:14:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Quinlan X-Patchwork-Id: 12668311 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A5C5C433F5 for ; Thu, 9 Dec 2021 21:14:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232817AbhLIVSD (ORCPT ); Thu, 9 Dec 2021 16:18:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232848AbhLIVSC (ORCPT ); Thu, 9 Dec 2021 16:18:02 -0500 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70052C0617A2; Thu, 9 Dec 2021 13:14:28 -0800 (PST) Received: by mail-pl1-x62e.google.com with SMTP id u11so4853359plf.3; Thu, 09 Dec 2021 13:14:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=+Qzj5uM3WmTTnFaEKj5iKt+4OPXn0Lx6lUn5gyvkQ+E=; b=T7zIYHXGDGLH68yTR9AS+wy5YX4rG81euAcVO+77a6QXucxpOLsryN1xcuLI3aTb7J VRni6YqAAqlt94AIDRc6BrLELzW3yxEC5MqWw+8m86mi4dt70oBkfpuWiYrktw6jrtxD oy5zYUip31rq0vzE/z2zP48wc4SmXc2tjYkZckFEKv3ra/6vz38xIa+xuQzhNc6h/FpV w8f6bwKUsxNZCu394H+EqVZN4n8b0J6AqYvfcEcxv+6+6mW7eHNR95tC3w59HallXnf/ rshjeohThuGuJY7MCO+YzS2+b33IBTuv90tMlr4iz1z5wjoOI/V7LSb30ytSDQYprtiy xJAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=+Qzj5uM3WmTTnFaEKj5iKt+4OPXn0Lx6lUn5gyvkQ+E=; b=ex8qWLqAcCTnWM4FYeJd2QPyuuQd+0Af78aVLsiyyEcvLRPwC/Dreni/ymRxF/lx7a 77+gjZlpNEax7lsUdv4q95nTbtX/zDcznrCt5m5ucIANolSRquYDPVIso9lXy0/AwuQt QAWzQT1E/ZF0rITDGdqwUC2npD56OyJwm8kH6NeSOQrCRZM7QwUos8F+3tcDKVD231LS PVkozhckhheBKP+AXcg6oQlBf3F3A7YZ4Ex5c8X1IKIsXZqGkIcRfZRD9bLMWyqoS0m/ nWoeqm3e65FONFARk9K8x423PC36tgOo2bIxhjFXKfhTP7I1pF4rRqXT01O9+3bYp9vr m1dQ== X-Gm-Message-State: AOAM531VO4gSKb/+q2FA+eNManbvkBx3Vl1Xkucg0jytn9g7zZ8Q76rh 7GikFSoqZ0ZbKKFlP2c4M3T3KQFGpDg= X-Google-Smtp-Source: ABdhPJxJq3ZihiJupQgXscc7nwgUJE1FJX6qa58J9Fl7YdyGBvG0UmIGNfLmNJOVbp9oG0KDahudVQ== X-Received: by 2002:a17:903:1210:b0:143:a088:7932 with SMTP id l16-20020a170903121000b00143a0887932mr71635830plh.11.1639084467692; Thu, 09 Dec 2021 13:14:27 -0800 (PST) Received: from stbsrv-and-01.and.broadcom.net ([192.19.11.250]) by smtp.gmail.com with ESMTPSA id y4sm617800pfi.178.2021.12.09.13.14.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Dec 2021 13:14:27 -0800 (PST) From: Jim Quinlan To: linux-pci@vger.kernel.org, Bjorn Helgaas , Nicolas Saenz Julienne , Rob Herring , Mark Brown , bcm-kernel-feedback-list@broadcom.com, jim2101024@gmail.com, james.quinlan@broadcom.com Cc: Florian Fainelli , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , linux-rpi-kernel@lists.infradead.org (moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE), linux-arm-kernel@lists.infradead.org (moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v10 5/7] PCI: brcmstb: Split brcm_pcie_setup() into two funcs Date: Thu, 9 Dec 2021 16:14:03 -0500 Message-Id: <20211209211407.8102-6-jim2101024@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211209211407.8102-1-jim2101024@gmail.com> References: <20211209211407.8102-1-jim2101024@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org We need to take some code in brcm_pcie_setup() and put it in a new function brcm_pcie_linkup(). In future commits the brcm_pcie_linkup() function will be called indirectly by pci_host_probe() as opposed to the host driver invoking it directly. Some code that was executed after the PCIe linkup is now placed so that it executes prior to linkup, since this code has to run prior to the invocation of pci_host_probe(). Signed-off-by: Jim Quinlan --- drivers/pci/controller/pcie-brcmstb.c | 65 ++++++++++++++++----------- 1 file changed, 39 insertions(+), 26 deletions(-) diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 9ed79ddb6a83..5f373227aad6 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -863,16 +863,9 @@ static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie, static int brcm_pcie_setup(struct brcm_pcie *pcie) { - struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); u64 rc_bar2_offset, rc_bar2_size; void __iomem *base = pcie->base; - struct device *dev = pcie->dev; - struct resource_entry *entry; - bool ssc_good = false; - struct resource *res; - int num_out_wins = 0; - u16 nlw, cls, lnksta; - int i, ret, memc; + int ret, memc; u32 tmp, burst, aspm_support; /* Reset the bridge */ @@ -957,6 +950,40 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) if (pcie->gen) brcm_pcie_set_gen(pcie, pcie->gen); + /* Don't advertise L0s capability if 'aspm-no-l0s' */ + aspm_support = PCIE_LINK_STATE_L1; + if (!of_property_read_bool(pcie->np, "aspm-no-l0s")) + aspm_support |= PCIE_LINK_STATE_L0S; + tmp = readl(base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); + u32p_replace_bits(&tmp, aspm_support, + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK); + writel(tmp, base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); + + /* + * For config space accesses on the RC, show the right class for + * a PCIe-PCIe bridge (the default setting is to be EP mode). + */ + tmp = readl(base + PCIE_RC_CFG_PRIV1_ID_VAL3); + u32p_replace_bits(&tmp, 0x060400, + PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK); + writel(tmp, base + PCIE_RC_CFG_PRIV1_ID_VAL3); + + return 0; +} + +static int brcm_pcie_linkup(struct brcm_pcie *pcie) +{ + struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie); + struct device *dev = pcie->dev; + void __iomem *base = pcie->base; + struct resource_entry *entry; + struct resource *res; + int num_out_wins = 0; + u16 nlw, cls, lnksta; + bool ssc_good = false; + u32 tmp; + int ret, i; + /* Unassert the fundamental reset */ pcie->perst_set(pcie, 0); @@ -994,24 +1021,6 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) num_out_wins++; } - /* Don't advertise L0s capability if 'aspm-no-l0s' */ - aspm_support = PCIE_LINK_STATE_L1; - if (!of_property_read_bool(pcie->np, "aspm-no-l0s")) - aspm_support |= PCIE_LINK_STATE_L0S; - tmp = readl(base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); - u32p_replace_bits(&tmp, aspm_support, - PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK); - writel(tmp, base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY); - - /* - * For config space accesses on the RC, show the right class for - * a PCIe-PCIe bridge (the default setting is to be EP mode). - */ - tmp = readl(base + PCIE_RC_CFG_PRIV1_ID_VAL3); - u32p_replace_bits(&tmp, 0x060400, - PCIE_RC_CFG_PRIV1_ID_VAL3_CLASS_CODE_MASK); - writel(tmp, base + PCIE_RC_CFG_PRIV1_ID_VAL3); - if (pcie->ssc) { ret = brcm_pcie_set_ssc(pcie); if (ret == 0) @@ -1200,6 +1209,10 @@ static int brcm_pcie_resume(struct device *dev) if (ret) goto err_reset; + ret = brcm_pcie_linkup(pcie); + if (ret) + goto err_reset; + if (pcie->msi) brcm_msi_set_regs(pcie->msi);