From patchwork Mon Aug 3 21:00:53 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: 256655 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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, 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 BF7F7C433E8 for ; Mon, 3 Aug 2020 21:01:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C36A222BED for ; Mon, 3 Aug 2020 21:01:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596488491; bh=wk2UQbife8WWy3Zcpra6VeQRa3MzU6w9zgTEphtMY2M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=giKaoIx94K7fdNDMQNzgQzV/5cbvtR47aKCWdNrSIZO/f/GfVFNdDFAzf3NCEG3Uu tjbWSYeoJRZ8MDQjXpEzagWs3lMAFqpi7+DfjZbWZBoXIvv9pjxF2dI8VpjaivdCS0 wNS9K8I/HvbC+6dPTQQVI4pHks2xJKNxhOkXcxyo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729353AbgHCVBa (ORCPT ); Mon, 3 Aug 2020 17:01:30 -0400 Received: from mail-io1-f68.google.com ([209.85.166.68]:43651 "EHLO mail-io1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729040AbgHCVB3 (ORCPT ); Mon, 3 Aug 2020 17:01:29 -0400 Received: by mail-io1-f68.google.com with SMTP id k23so39948190iom.10; Mon, 03 Aug 2020 14:01:29 -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=iogw0PHdW281Zilh8Ybv/eHK0mtpVLAHgw0xblz2JaM=; b=Y+G2v9urpYl/zFtdG3UZYy7xrppuQDw4XuVOJnC+YA1KSSOiIgf3tQh6V2qHshLntD xXG3yq5Kw/+74OYr3fWMaSjmr6qZFiU+kEjL8liXnId16rLCSTW4wHsYmF6zW1eR2sNp nZBVHw0nzVPcc/lofqPmwnywFw/aYDPhIlx13HVrEQUKkbHnIHG17t4YdBXLRHLfsNT/ Ns/x3yGacAY9h22ajXgWiKkjU+nnrZ3vrbMOs+LxSkvmrT0JGz8oAwKC8cyAAXfVlWan Y168V6JPNJkR8QePx3brLcY+IdQrrm4DusWfiznfyWgaYpNDYGyUInL2eqP5gktOYj4n MEbA== X-Gm-Message-State: AOAM530Zt6IRkNcoPaDkDcVX4RCQKZPXY85uO8wvzbj3pHI6/1w17vS/ Hd/7blXodU0WArYVg8czgA== X-Google-Smtp-Source: ABdhPJzvA+ZR7sxoZ88i2XSskORxkOa+8bB7U69jJSZRKahou6ztK7tanUL8FCvVfOXfz7EcTwHx3A== X-Received: by 2002:a6b:c504:: with SMTP id v4mr1848864iof.20.1596488488493; Mon, 03 Aug 2020 14:01:28 -0700 (PDT) Received: from xps15.herring.priv ([64.188.179.252]) by smtp.googlemail.com with ESMTPSA id r6sm9292280iod.7.2020.08.03.14.01.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Aug 2020 14:01:27 -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 04/27] PCI: dwc: Add a default pci_ops.map_bus for root port Date: Mon, 3 Aug 2020 15:00:53 -0600 Message-Id: <20200803210116.3132633-5-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 Designware root port config space is memory mapped accesses via the DBI space by default. Add a common implementation dw_pcie_own_conf_map_bus() for platforms to use. Cc: Jingoo Han Cc: Gustavo Pimentel Cc: Lorenzo Pieralisi Cc: Bjorn Helgaas Signed-off-by: Rob Herring --- drivers/pci/controller/dwc/pcie-designware-host.c | 11 +++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 2 ++ 2 files changed, 13 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 7cd8c9528d4c..e9d31c341881 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -615,6 +615,17 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn, return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val); } +void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, int where) +{ + struct pcie_port *pp = bus->sysdata; + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + + if (PCI_SLOT(devfn) > 0) + return NULL; + + return pci->dbi_base + where; +} + static struct pci_ops dw_pcie_ops = { .read = dw_pcie_rd_conf, .write = dw_pcie_wr_conf, diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index bad3cddab28e..dbe53e464e11 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -378,6 +378,8 @@ void dw_pcie_setup_rc(struct pcie_port *pp); int dw_pcie_host_init(struct pcie_port *pp); void dw_pcie_host_deinit(struct pcie_port *pp); int dw_pcie_allocate_domains(struct pcie_port *pp); +void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, + int where); #else static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) {