From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vidya Sagar Subject: [PATCH 01/10] PCI: save pci_bus pointer in pcie_port structure Date: Tue, 26 Mar 2019 20:43:18 +0530 Message-ID: <1553613207-3988-2-git-send-email-vidyas@nvidia.com> References: <1553613207-3988-1-git-send-email-vidyas@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1553613207-3988-1-git-send-email-vidyas@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: bhelgaas@google.com, robh+dt@kernel.org, mark.rutland@arm.com, thierry.reding@gmail.com, jonathanh@nvidia.com, kishon@ti.com, catalin.marinas@arm.com, will.deacon@arm.com, lorenzo.pieralisi@arm.com, jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, mperttunen@nvidia.com, vidyas@nvidia.com, tiwai@suse.de, spujar@nvidia.com, skomatineni@nvidia.com, liviu.dudau@arm.com, krzk@kernel.org, heiko@sntech.de, horms+renesas@verge.net.au, olof@lixom.net, maxime.ripard@bootlin.com, andy.gross@linaro.org, bjorn.andersson@linaro.org, jagan@amarulasolutions.com, enric.balletbo@collabora.com, ezequiel@collabora.com, stefan.wahren@i2se.com, marc.w.gonzalez@free.fr, l.stach@pengutronix.de, tpiepho@impinj.com, hayashi.kunihiko@ Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kthota@nvidia.com, mmaddireddy@nvidia.com List-Id: linux-tegra@vger.kernel.org save pci_bus pointer created by PCIe sub-system's pci_scan_root_bus_bridge() to be used by host controller drivers for post processing. Tegra host controller driver needs it for the following reasons - to derive pci_host_bridge structure from pci_bus which is used to configure iATU's outbound regions for different windows accesses - to traverse and configure downstream hierarchy. One such case is, configuring all immediate downstream devices to D0 state before transiting link to L2 state. Saving pci_bus pointer seems the best method compared to deriving it by other means. Signed-off-by: Vidya Sagar --- drivers/pci/controller/dwc/pcie-designware-host.c | 1 + drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 25087d3c9a82..15add3cf3945 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -494,6 +494,7 @@ int dw_pcie_host_init(struct pcie_port *pp) goto error; bus = bridge->bus; + pp->bus = bus; if (pp->ops->scan_bus) pp->ops->scan_bus(pp); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 377f4c0b52da..70007276bc93 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -175,6 +175,7 @@ struct pcie_port { struct resource *busn; int irq; const struct dw_pcie_host_ops *ops; + struct pci_bus *bus; int msi_irq; struct irq_domain *irq_domain; struct irq_domain *msi_domain; -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 4AEE8C43381 for ; Tue, 26 Mar 2019 15:14:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C5982070D for ; Tue, 26 Mar 2019 15:14:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="BJAuOBjy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732019AbfCZPOW (ORCPT ); Tue, 26 Mar 2019 11:14:22 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:4950 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726175AbfCZPOV (ORCPT ); Tue, 26 Mar 2019 11:14:21 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Tue, 26 Mar 2019 08:14:16 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Tue, 26 Mar 2019 08:14:20 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Tue, 26 Mar 2019 08:14:20 -0700 Received: from HQMAIL102.nvidia.com (172.18.146.10) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 26 Mar 2019 15:14:20 +0000 Received: from HQMAIL108.nvidia.com (172.18.146.13) by HQMAIL102.nvidia.com (172.18.146.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 26 Mar 2019 15:14:19 +0000 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Tue, 26 Mar 2019 15:14:19 +0000 Received: from vidyas-desktop.nvidia.com (Not Verified[10.24.37.38]) by hqnvemgw02.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Tue, 26 Mar 2019 08:14:19 -0700 From: Vidya Sagar To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , , , , , Subject: [PATCH 01/10] PCI: save pci_bus pointer in pcie_port structure Date: Tue, 26 Mar 2019 20:43:18 +0530 Message-ID: <1553613207-3988-2-git-send-email-vidyas@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1553613207-3988-1-git-send-email-vidyas@nvidia.com> References: <1553613207-3988-1-git-send-email-vidyas@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1553613256; bh=ajoC/pclit004a1DH0iOXhHMxfdpECOLvK6JLTZhJKQ=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=BJAuOBjyWFwg7r516BafCaDbsdk4nuDCtjbKFVYdWQNeiS8LJru9ZPI8ikHLj9juV TcQuoMNHDhQKSabahrxVHvJjiIEVep8dZEiKLUMHm7lcoa6vRSen5QUNl+Z5pcq34n bdLp896dGbpngZKf4qra/5FQiimAfzreB3NA6+bsuh1aTku15pQz4nqGi8wkuqolK+ oHPIhnYNCyQptfGC021zgyhZcstzO+OpzL6uQJbzFR/0ntXVlBS+EN8YoAc8T5PwtU d17gtLE9aj7Hxos3j4xMYufCXwURFEsiytBExOh8PDJsJ6QRk9cca9V1PiK6HL9TVq AWnLvIjiC4qpg== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org save pci_bus pointer created by PCIe sub-system's pci_scan_root_bus_bridge() to be used by host controller drivers for post processing. Tegra host controller driver needs it for the following reasons - to derive pci_host_bridge structure from pci_bus which is used to configure iATU's outbound regions for different windows accesses - to traverse and configure downstream hierarchy. One such case is, configuring all immediate downstream devices to D0 state before transiting link to L2 state. Saving pci_bus pointer seems the best method compared to deriving it by other means. Signed-off-by: Vidya Sagar --- drivers/pci/controller/dwc/pcie-designware-host.c | 1 + drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 25087d3c9a82..15add3cf3945 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -494,6 +494,7 @@ int dw_pcie_host_init(struct pcie_port *pp) goto error; bus = bridge->bus; + pp->bus = bus; if (pp->ops->scan_bus) pp->ops->scan_bus(pp); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 377f4c0b52da..70007276bc93 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -175,6 +175,7 @@ struct pcie_port { struct resource *busn; int irq; const struct dw_pcie_host_ops *ops; + struct pci_bus *bus; int msi_irq; struct irq_domain *irq_domain; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org save pci_bus pointer created by PCIe sub-system's pci_scan_root_bus_bridge() to be used by host controller drivers for post processing. Tegra host controller driver needs it for the following reasons - to derive pci_host_bridge structure from pci_bus which is used to configure iATU's outbound regions for different windows accesses - to traverse and configure downstream hierarchy. One such case is, configuring all immediate downstream devices to D0 state before transiting link to L2 state. Saving pci_bus pointer seems the best method compared to deriving it by other means. Signed-off-by: Vidya Sagar --- drivers/pci/controller/dwc/pcie-designware-host.c | 1 + drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 25087d3c9a82..15add3cf3945 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -494,6 +494,7 @@ int dw_pcie_host_init(struct pcie_port *pp) goto error; bus = bridge->bus; + pp->bus = bus; if (pp->ops->scan_bus) pp->ops->scan_bus(pp); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 377f4c0b52da..70007276bc93 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -175,6 +175,7 @@ struct pcie_port { struct resource *busn; int irq; const struct dw_pcie_host_ops *ops; + struct pci_bus *bus; int msi_irq; struct irq_domain *irq_domain; struct irq_domain *msi_domain; -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel