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From: Jingoo Han <jingoohan1@gmail.com>
To: Rob Herring <robh@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	Binghui Wang <wangbinghui@hisilicon.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>,
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	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Jonathan Chocron <jonnyc@amazon.com>,
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	Jonathan Hunter <jonathanh@nvidia.com>,
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	"linux-samsung-soc@vger.kernel.org"
	<linux-samsung-soc@vger.kernel.org>,
	Minghuan Lian <minghuan.Lian@nxp.com>,
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	Sascha Hauer <s.hauer@pengutronix.de>,
	Yue Wang <yue.wang@Amlogic.com>,
	Murali Karicheri <m-karicheri2@ti.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	"linux-amlogic@lists.infradead.org"
	<linux-amlogic@lists.infradead.org>,
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	Mingkai Hu <mingkai.hu@nxp.com>, Roy Zang <roy.zang@nxp.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Andy Gross <agross@kernel.org>,
	Stanimir Varbanov <svarbanov@mm-sol.com>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Han Jingoo <jingoohan1@gmail.com>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	Lucas Stach <l.stach@pengutronix.de>
Subject: Re: [PATCH 05/13] PCI: dwc: Ensure all outbound ATU windows are reset
Date: Thu, 29 Oct 2020 22:12:36 +0000
Message-ID: <SL2P216MB0475A290104BEB83332A89B5AA140@SL2P216MB0475.KORP216.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <20201028204646.356535-6-robh@kernel.org>

On 10/28/20, 4:47 PM, Rob Herring wrote:
> 
> The Layerscape driver clears the ATU registers which may have been
> configured by the bootloader. Any driver could have the same issue
> and doing it for all drivers doesn't hurt, so let's move it into the
> common DWC code.
>
> Cc: Minghuan Lian <minghuan.Lian@nxp.com>
> Cc: Mingkai Hu <mingkai.hu@nxp.com>
> Cc: Roy Zang <roy.zang@nxp.com>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Cc: Jingoo Han <jingoohan1@gmail.com>

Acked-by: Jingoo Han <jingoohan1@gmail.com>

Best regards,
Jingoo Han

> Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
> Cc: linuxppc-dev@lists.ozlabs.org
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
>  drivers/pci/controller/dwc/pci-layerscape.c       | 14 --------------
>  drivers/pci/controller/dwc/pcie-designware-host.c |  5 +++++
>  2 files changed, 5 insertions(+), 14 deletions(-)
>
>  diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c
>  index f24f79a70d9a..53e56d54c482 100644
>  --- a/drivers/pci/controller/dwc/pci-layerscape.c
>  +++ b/drivers/pci/controller/dwc/pci-layerscape.c
>  @@ -83,14 +83,6 @@ static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie)
>   	iowrite32(val, pci->dbi_base + PCIE_STRFMR1);
>   }
>  
>  -static void ls_pcie_disable_outbound_atus(struct ls_pcie *pcie)
>  -{
>  -	int i;
>  -
>  -	for (i = 0; i < PCIE_IATU_NUM; i++)
>  -		dw_pcie_disable_atu(pcie->pci, i, DW_PCIE_REGION_OUTBOUND);
>  -}
>  -
>   static int ls1021_pcie_link_up(struct dw_pcie *pci)
>   {
>   	u32 state;
>  @@ -136,12 +128,6 @@ static int ls_pcie_host_init(struct pcie_port *pp)
>   	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
>   	struct ls_pcie *pcie = to_ls_pcie(pci);
>  
>  -	/*
>  -	 * Disable outbound windows configured by the bootloader to avoid
>  -	 * one transaction hitting multiple outbound windows.
>  -	 * dw_pcie_setup_rc() will reconfigure the outbound windows.
>  -	 */
>  -	ls_pcie_disable_outbound_atus(pcie);
>   	ls_pcie_fix_error_response(pcie);
>  
>   	dw_pcie_dbi_ro_wr_en(pci);
>  diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
>  index cde45b2076ee..265a48f1a0ae 100644
>  --- a/drivers/pci/controller/dwc/pcie-designware-host.c
>  +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
>  @@ -534,6 +534,7 @@ static struct pci_ops dw_pcie_ops = {
>  
>   void dw_pcie_setup_rc(struct pcie_port *pp)
>   {
>  +	int i;
>   	u32 val, ctrl, num_ctrls;
>   	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
>  
>  @@ -583,6 +584,10 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
>   		PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
>   	dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
>  
>  +	/* Ensure all outbound windows are disabled so there are multiple matches */
>  +	for (i = 0; i < pci->num_viewport; i++)
>  +		dw_pcie_disable_atu(pci, i, DW_PCIE_REGION_OUTBOUND);
>  +
>   	/*
>   	 * If the platform provides its own child bus config accesses, it means
>   	 * the platform uses its own address translation component rather than
>  -- 
>  2.25.1


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Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-28 20:46 [PATCH 00/13] PCI: dwc: Another round of clean-ups Rob Herring
2020-10-28 20:46 ` [PATCH 01/13] PCI: dwc/imx6: Drop setting PCI_MSI_FLAGS_ENABLE Rob Herring
2020-10-29  0:21   ` Michael Ellerman
2020-10-29 13:01     ` Rob Herring
2020-10-28 20:46 ` [PATCH 02/13] PCI: dwc/intel-gw: Move ATU offset out of driver match data Rob Herring
2020-10-28 20:46 ` [PATCH 03/13] PCI: dwc: Move "dbi", "dbi2", and "addr_space" resource setup into common code Rob Herring
2020-10-29 22:09   ` Jingoo Han
2020-10-28 20:46 ` [PATCH 04/13] PCI: dwc/intel-gw: Remove some unneeded function wrappers Rob Herring
2020-10-28 20:46 ` [PATCH 05/13] PCI: dwc: Ensure all outbound ATU windows are reset Rob Herring
2020-10-29 22:12   ` Jingoo Han [this message]
2020-10-28 20:46 ` [PATCH 06/13] PCI: dwc/dra7xx: Use the common MSI irq_chip Rob Herring
2020-10-28 20:46 ` [PATCH 07/13] PCI: dwc: Drop the .set_num_vectors() host op Rob Herring
2020-10-29 22:15   ` Jingoo Han
2020-10-28 20:46 ` [PATCH 08/13] PCI: dwc: Move MSI interrupt setup into DWC common code Rob Herring
2020-10-29 22:18   ` Jingoo Han
2020-10-28 20:46 ` [PATCH 09/13] PCI: dwc: Rework MSI initialization Rob Herring
2020-10-29 22:20   ` Jingoo Han
2020-10-28 20:46 ` [PATCH 10/13] PCI: dwc: Move link handling into common code Rob Herring
2020-10-29 22:24   ` Jingoo Han
2020-10-28 20:46 ` [PATCH 11/13] PCI: dwc: Move dw_pcie_msi_init() into core Rob Herring
2020-10-29 22:26   ` Jingoo Han
2020-10-28 20:46 ` [PATCH 12/13] PCI: dwc: Move dw_pcie_setup_rc() to DWC common code Rob Herring
2020-10-29 22:29   ` Jingoo Han
2020-10-28 20:46 ` [PATCH 13/13] PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init() Rob Herring

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