From patchwork Mon Aug 3 21:01:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rob Herring \(Arm\)" X-Patchwork-Id: 247422 Delivered-To: patch@linaro.org Received: by 2002:a92:cc90:0:0:0:0:0 with SMTP id x16csp1540953ilo; Mon, 3 Aug 2020 14:03:28 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyZfoaBo4iIhiXxJ5uqp8XDyI1l2Ww/N75lzn7gPMKeEKhc7ENvScG48nUGpwYj7QGk/Qr9 X-Received: by 2002:a17:906:817:: with SMTP id e23mr18203035ejd.203.1596488530927; Mon, 03 Aug 2020 14:02:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1596488530; cv=none; d=google.com; s=arc-20160816; b=xIRj7ej19xEucLfp5kfcgw8pYVVyzTt02/8jLEWwyv23PpaqkHHYynSt8lzn25SbeP A6tmr9RMoeq9TZU2snE3+jCbyS142WWsgOn0I8zAPehjjCQ/UYHmytv3yca5kY9FGsyQ Bqe/ZxT/7PY+yV3K3LG3gRb5Nv1Jg3pK3UTjYSrsMXSLEdR091p/gWOcbDTwUPA6SdFa zKW8VkiUczHwd7WIvWkslbUaxhSRW31tZydeKHGce+mfgdHsxDQQ+kwj6xELcWy3jX0x hjibml63AJReqmxsifCOL2czOuLa5/3fatmO3NRPGW+BDiN2osS+c2JZckByYUrtiuhh Jw/w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=A5ZRdGbgMokbNA9oTRazmcvFgPKDBEIf6TFNg0ak5Ts=; b=t2mJmSquRZnN+t1YHa2Qf8AMJG0cubon4q9Q/veWX/ODhRvnF2mptXWS/UiAJXdEod oK2vTz+tNTSBIssmPdHZSo4lYW3hk4zhqi0yOcQ9uisNbPeOyuvIj0JozhB31FPXoA38 kqU4TvV4CTa3Q1ELkiBlVEkbqP3sZtI4tcCDe/hCL0bFVTN/CiJlcFqxrgOSkG/+UMRn cU82EUdi9xuiS80S6QaanMMLNAJShTaNN8O65hWHJg7QbOGVPiaVww/FCepcoDgn6Bu8 PJx7+uo3c1FRxwqA252KYWu05TIBC946u1kbFWbz/eHT1jioSd8pPLM6lcgt1WKhsTIl Pyqw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-omap-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-omap-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id i2si9818208ejp.500.2020.08.03.14.02.10; Mon, 03 Aug 2020 14:02:10 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-omap-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-omap-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-omap-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729424AbgHCVCJ (ORCPT + 4 others); Mon, 3 Aug 2020 17:02:09 -0400 Received: from mail-il1-f196.google.com ([209.85.166.196]:44555 "EHLO mail-il1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729421AbgHCVCJ (ORCPT ); Mon, 3 Aug 2020 17:02:09 -0400 Received: by mail-il1-f196.google.com with SMTP id j9so28945699ilc.11; Mon, 03 Aug 2020 14:02:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=A5ZRdGbgMokbNA9oTRazmcvFgPKDBEIf6TFNg0ak5Ts=; b=qZxKoT1foi+uSuk53LfhPqd0EzhI03llostbNQYWNZwVJzHEURc8eEWEgCcWk3vpVs QAB72IsVN5kD/TPQtpIMR4NAW9t2o6lhNHvcyDHGiDloKEKVWeG7tZOp9RNGeM6g5Ner z/SpCSBseHzx4xYYzpU4zqR5/sKfp6E4TaS/atCq2Mh0qtlixJbRyU5QrNKp3g7AP+LI WsvyMq1/I7BCgoZzrurHU9xpk8daet8XBnOJYOCVGYSyT8W5CCj1PhJmVT/Ht7whpOiF TEbsGGwkgdW/WpCm/f+/qrKT4X2jqj75Fbs0wwL/TKfdux0xsRcJYRXKMBzPCmSJZGaB zEuA== X-Gm-Message-State: AOAM533dwSYEPHD03rg1fm1YygA9gpfb7vEJdiYY6qXTEnXypa86Jq0I kFMacaCy9AQlDlEXTdoQ2g== X-Received: by 2002:a92:660e:: with SMTP id a14mr1369453ilc.290.1596488527825; Mon, 03 Aug 2020 14:02:07 -0700 (PDT) Received: from xps15.herring.priv ([64.188.179.252]) by smtp.googlemail.com with ESMTPSA id r6sm9292280iod.7.2020.08.03.14.02.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Aug 2020 14:02:07 -0700 (PDT) From: Rob Herring To: Bjorn Helgaas , Gustavo Pimentel , Jingoo Han , Lorenzo Pieralisi Cc: Binghui Wang , Bjorn Andersson , Fabio Estevam , Jesper Nilsson , Jonathan Chocron , Jonathan Hunter , Kevin Hilman , Kishon Vijay Abraham I , Krzysztof Kozlowski , Kukjin Kim , Kunihiko Hayashi , linux-amlogic@lists.infradead.org, linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-omap@vger.kernel.org, linux-pci@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, Lucas Stach , Masahiro Yamada , Murali Karicheri , NXP Linux Team , Pengutronix Kernel Team , Pratyush Anand , Richard Zhu , Sascha Hauer , Shawn Guo , Stanimir Varbanov , Thierry Reding , Xiaowei Song , Yue Wang Subject: [RFC 19/27] PCI: dwc: Simplify config space handling Date: Mon, 3 Aug 2020 15:01:08 -0600 Message-Id: <20200803210116.3132633-20-robh@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200803210116.3132633-1-robh@kernel.org> References: <20200803210116.3132633-1-robh@kernel.org> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org The config space is divided in half for type 0 and type 1 accesses, but this is pointless as there's only one iATU window which is reconfigured on each access. The only platform doing something custom is TI Keystone (surprise!). It does its own mapping of the config space to avoid spliting the config space and never actually uses va_cfg1_base as it has its own config space accessors. With the splitting removed, Keystone can use the default mapping of config space. Cc: Murali Karicheri Cc: Lorenzo Pieralisi Cc: Bjorn Helgaas Cc: Jingoo Han Cc: Gustavo Pimentel Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Rob Herring --- drivers/pci/controller/dwc/pci-keystone.c | 8 --- .../pci/controller/dwc/pcie-designware-host.c | 63 ++++++------------- drivers/pci/controller/dwc/pcie-designware.h | 4 -- 3 files changed, 20 insertions(+), 55 deletions(-) -- 2.25.1 diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index bdf4fe1fc822..e9028c98d6c0 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -873,16 +873,8 @@ static int __init ks_pcie_add_pcie_port(struct keystone_pcie *ks_pcie, struct dw_pcie *pci = ks_pcie->pci; struct pcie_port *pp = &pci->pp; struct device *dev = &pdev->dev; - struct resource *res; int ret; - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); - pp->va_cfg0_base = devm_pci_remap_cfg_resource(dev, res); - if (IS_ERR(pp->va_cfg0_base)) - return PTR_ERR(pp->va_cfg0_base); - - pp->va_cfg1_base = pp->va_cfg0_base; - ret = dw_pcie_host_init(pp); if (ret) { dev_err(dev, "failed to initialize host\n"); diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index a981e9de81d7..1ff4702595b6 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -308,10 +308,8 @@ int dw_pcie_host_init(struct pcie_port *pp) cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config"); if (cfg_res) { - pp->cfg0_size = resource_size(cfg_res) >> 1; - pp->cfg1_size = resource_size(cfg_res) >> 1; + pp->cfg0_size = resource_size(cfg_res); pp->cfg0_base = cfg_res->start; - pp->cfg1_base = cfg_res->start + pp->cfg0_size; } else if (!pp->va_cfg0_base) { dev_err(dev, "Missing *config* reg space\n"); } @@ -336,25 +334,22 @@ int dw_pcie_host_init(struct pcie_port *pp) pp->io_base = pci_pio_to_address(win->res->start); break; case 0: - pp->cfg = win->res; - pp->cfg0_size = resource_size(pp->cfg) >> 1; - pp->cfg1_size = resource_size(pp->cfg) >> 1; - pp->cfg0_base = pp->cfg->start; - pp->cfg1_base = pp->cfg->start + pp->cfg0_size; + dev_err(dev, "Missing *config* reg space\n"); + pp->cfg0_size = resource_size(win->res); + pp->cfg0_base = win->res->start; + if (!pci->dbi_base) { + pci->dbi_base = devm_pci_remap_cfgspace(dev, + pp->cfg0_base, + pp->cfg0_size); + if (!pci->dbi_base) { + dev_err(dev, "Error with ioremap\n"); + return -ENOMEM; + } + } break; } } - if (!pci->dbi_base) { - pci->dbi_base = devm_pci_remap_cfgspace(dev, - pp->cfg->start, - resource_size(pp->cfg)); - if (!pci->dbi_base) { - dev_err(dev, "Error with ioremap\n"); - return -ENOMEM; - } - } - if (!pp->va_cfg0_base) { pp->va_cfg0_base = devm_pci_remap_cfgspace(dev, pp->cfg0_base, pp->cfg0_size); @@ -364,16 +359,6 @@ int dw_pcie_host_init(struct pcie_port *pp) } } - if (!pp->va_cfg1_base) { - pp->va_cfg1_base = devm_pci_remap_cfgspace(dev, - pp->cfg1_base, - pp->cfg1_size); - if (!pp->va_cfg1_base) { - dev_err(dev, "Error with ioremap\n"); - return -ENOMEM; - } - } - ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport); if (ret) pci->num_viewport = 2; @@ -455,32 +440,24 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, unsigned int devfn, int where) { int type; - u32 busdev, cfg_size; - u64 cpu_addr; - void __iomem *va_cfg_base; + u32 busdev; struct pcie_port *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) | PCIE_ATU_FUNC(PCI_FUNC(devfn)); - if (bus->parent->number == pp->root_bus_nr) { + if (bus->parent->number == pp->root_bus_nr) type = PCIE_ATU_TYPE_CFG0; - cpu_addr = pp->cfg0_base; - cfg_size = pp->cfg0_size; - va_cfg_base = pp->va_cfg0_base; - } else { + else type = PCIE_ATU_TYPE_CFG1; - cpu_addr = pp->cfg1_base; - cfg_size = pp->cfg1_size; - va_cfg_base = pp->va_cfg1_base; - } + dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1, - type, cpu_addr, - busdev, cfg_size); + type, pp->cfg0_size, + busdev, pp->cfg0_size); - return va_cfg_base + where; + return pp->va_cfg0_base + where; } static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn, diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 3d552ec8a850..2db6f52dfe81 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -170,13 +170,9 @@ struct pcie_port { u64 cfg0_base; void __iomem *va_cfg0_base; u32 cfg0_size; - u64 cfg1_base; - void __iomem *va_cfg1_base; - u32 cfg1_size; resource_size_t io_base; phys_addr_t io_bus_addr; u32 io_size; - struct resource *cfg; int irq; const struct dw_pcie_host_ops *ops; int msi_irq;