From patchwork Mon Aug 3 21:00:59 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: 11698915 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 1FB9B138C for ; Mon, 3 Aug 2020 21:01:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6138422BED for ; Mon, 3 Aug 2020 21:01:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596488505; bh=c2Hy7IGw+0ks5TnBLCVB5XK/gl2QGV5g33Lueac+Dg0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=cZMV4yYj6b3gYfz0Md7qiwW4b5KuiqE6OSD6GptX/+QWBQhKoZDHLUz4iRfbVwcpU Ho5htVpsKTAcPr5QDOTTbUtUZ4KP497SEwhp7yx/R3yEURy+H8CTLGnytVq/oXqZLP q81GUSw+kebFKm5qB4ZA93WiXyrMOnuvrU00f6+A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729337AbgHCVBn (ORCPT ); Mon, 3 Aug 2020 17:01:43 -0400 Received: from mail-il1-f194.google.com ([209.85.166.194]:38507 "EHLO mail-il1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729372AbgHCVBn (ORCPT ); Mon, 3 Aug 2020 17:01:43 -0400 Received: by mail-il1-f194.google.com with SMTP id 77so3879440ilc.5; Mon, 03 Aug 2020 14:01:42 -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=w74e1Ztc1qAn6gEbliDEy8D1xkphK6dVWVgtaNcLV4w=; b=q1kAxFAcUcChwZzscN/BtqszSs41IJB+QrwM+exX6dedGv3CStCdg/RVz2KB+JVNTd 4IzBPkm0KWUVoQ4ol9qkscOv5vrBQudfo1+NfI9m0Ie9QPrCbL1FWFvWGIoHbsrrhZ7o Ag1BMDk25H9rYpGDvjxrHwK5Q1JAiPIeymUp/zuRaZisSurn+DxHc1OdJVwfvyMS5LTj emC/ivP3X7FimUFw7DQL9RBvzs7V66EsWDpqY/6jAfE+5Gr+AjZr8iDaNI/egBBWDGJh ZpJSCfRz4Q8V8LarXXLf8Q3BIMjaaxvwFWHCAOIN0zRX4W3u+nA95bg1XdzlcJ8PsIFF FWvw== X-Gm-Message-State: AOAM531GjW4M+HLPRoK3DZq9YUI5T4TS4b27JHPhELLBJo/mJY7g9u+i nC2l1dGg0OPiwySPF6Ii8A== X-Google-Smtp-Source: ABdhPJxfAjXpg9S6OMpw6Nsv1iLQNUvPbf7BO8gLdDkl8+aUBf9YmuX7VSlCNgb+o/i5Ag3SVp1l9g== X-Received: by 2002:a92:1b42:: with SMTP id b63mr1415959ilb.76.1596488501865; Mon, 03 Aug 2020 14:01:41 -0700 (PDT) Received: from xps15.herring.priv ([64.188.179.252]) by smtp.googlemail.com with ESMTPSA id r6sm9292280iod.7.2020.08.03.14.01.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Aug 2020 14:01:41 -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 10/27] PCI: dwc: exynos: Use pci_ops for root config space accessors Date: Mon, 3 Aug 2020 15:00:59 -0600 Message-Id: <20200803210116.3132633-11-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-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Now that DWC drivers can setup their own pci_ops for the root and child buses, convert the Samsung Exynos driver to use the standard pci_ops for root bus config accesses. Cc: Jingoo Han Cc: Lorenzo Pieralisi Cc: Bjorn Helgaas Cc: Kukjin Kim Cc: Krzysztof Kozlowski Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Signed-off-by: Rob Herring --- drivers/pci/controller/dwc/pci-exynos.c | 45 ++++++++++++++----------- 1 file changed, 25 insertions(+), 20 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-exynos.c b/drivers/pci/controller/dwc/pci-exynos.c index c5043d951e80..d5d37cffa441 100644 --- a/drivers/pci/controller/dwc/pci-exynos.c +++ b/drivers/pci/controller/dwc/pci-exynos.c @@ -338,32 +338,37 @@ static void exynos_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, exynos_pcie_sideband_dbi_w_mode(ep, false); } -static int exynos_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, - u32 *val) +static int exynos_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 *val) { - struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct exynos_pcie *ep = to_exynos_pcie(pci); - int ret; + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata); - exynos_pcie_sideband_dbi_r_mode(ep, true); - ret = dw_pcie_read(pci->dbi_base + where, size, val); - exynos_pcie_sideband_dbi_r_mode(ep, false); - return ret; + if (PCI_SLOT(devfn)) { + *val = ~0; + return PCIBIOS_DEVICE_NOT_FOUND; + } + + *val = dw_pcie_read_dbi(pci, where, size); + return PCIBIOS_SUCCESSFUL; } -static int exynos_pcie_wr_own_conf(struct pcie_port *pp, int where, int size, - u32 val) +static int exynos_pcie_wr_own_conf(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) { - struct dw_pcie *pci = to_dw_pcie_from_pp(pp); - struct exynos_pcie *ep = to_exynos_pcie(pci); - int ret; + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata); - exynos_pcie_sideband_dbi_w_mode(ep, true); - ret = dw_pcie_write(pci->dbi_base + where, size, val); - exynos_pcie_sideband_dbi_w_mode(ep, false); - return ret; + if (PCI_SLOT(devfn)) + return PCIBIOS_DEVICE_NOT_FOUND; + + dw_pcie_write_dbi(pci, where, size, val); + return PCIBIOS_SUCCESSFUL; } +static struct pci_ops exynos_pci_ops = { + .read = exynos_pcie_rd_own_conf, + .write = exynos_pcie_wr_own_conf, +}; + static int exynos_pcie_link_up(struct dw_pcie *pci) { struct exynos_pcie *ep = to_exynos_pcie(pci); @@ -381,6 +386,8 @@ static int exynos_pcie_host_init(struct pcie_port *pp) struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct exynos_pcie *ep = to_exynos_pcie(pci); + pp->bridge->ops = &exynos_pci_ops; + exynos_pcie_establish_link(ep); exynos_pcie_enable_interrupts(ep); @@ -388,8 +395,6 @@ static int exynos_pcie_host_init(struct pcie_port *pp) } static const struct dw_pcie_host_ops exynos_pcie_host_ops = { - .rd_own_conf = exynos_pcie_rd_own_conf, - .wr_own_conf = exynos_pcie_wr_own_conf, .host_init = exynos_pcie_host_init, };