linux-kernel - RE: [PATCH v7 4/7] PCI: imx6: Remove cpu_addr

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Message-ID:
 <AS8PR04MB867621820038DE62CA39D93E8C512@AS8PR04MB8676.eurprd04.prod.outlook.com>
Date: Mon, 4 Nov 2024 02:26:00 +0000
From: Hongxing Zhu <hongxing.zhu@....com>
To: Frank Li <frank.li@....com>, Rob Herring <robh@...nel.org>, Saravana
 Kannan <saravanak@...gle.com>, Jingoo Han <jingoohan1@...il.com>, Manivannan
 Sadhasivam <manivannan.sadhasivam@...aro.org>, Lorenzo Pieralisi
	<lpieralisi@...nel.org>, Krzysztof Wilczyński
	<kw@...ux.com>, Bjorn Helgaas <bhelgaas@...gle.com>, Lucas Stach
	<l.stach@...gutronix.de>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer
	<s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>
CC: "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "imx@...ts.linux.dev"
	<imx@...ts.linux.dev>
Subject: RE: [PATCH v7 4/7] PCI: imx6: Remove cpu_addr_fixup()

> -----Original Message-----
> From: Frank Li <frank.li@....com>
> Sent: 2024年10月30日 0:37
> To: Rob Herring <robh@...nel.org>; Saravana Kannan
> <saravanak@...gle.com>; Jingoo Han <jingoohan1@...il.com>;
> Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>; Lorenzo
> Pieralisi <lpieralisi@...nel.org>; Krzysztof Wilczyński <kw@...ux.com>; Bjorn
> Helgaas <bhelgaas@...gle.com>; Hongxing Zhu <hongxing.zhu@....com>;
> Lucas Stach <l.stach@...gutronix.de>; Shawn Guo <shawnguo@...nel.org>;
> Sascha Hauer <s.hauer@...gutronix.de>; Pengutronix Kernel Team
> <kernel@...gutronix.de>; Fabio Estevam <festevam@...il.com>
> Cc: devicetree@...r.kernel.org; linux-kernel@...r.kernel.org;
> linux-pci@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> imx@...ts.linux.dev; Frank Li <frank.li@....com>
> Subject: [PATCH v7 4/7] PCI: imx6: Remove cpu_addr_fixup()
> 
> Remove cpu_addr_fixup() because dwc common driver already handle
> address translate.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
Acked-by: Richard Zhu <hongxing.zhu@....com>

Best Regards
Richard Zhu
> ---
> Change from v2 to v7
> - none
> Change from v1 to v2
> - set using_dtbus_info true
> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 22 ++--------------------
>  1 file changed, 2 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c
> b/drivers/pci/controller/dwc/pci-imx6.c
> index 808d1f1054173..533905b3942a1 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -81,7 +81,6 @@ enum imx_pcie_variants {
>  #define IMX_PCIE_FLAG_HAS_PHY_RESET		BIT(5)
>  #define IMX_PCIE_FLAG_HAS_SERDES		BIT(6)
>  #define IMX_PCIE_FLAG_SUPPORT_64BIT		BIT(7)
> -#define IMX_PCIE_FLAG_CPU_ADDR_FIXUP		BIT(8)
> 
>  #define imx_check_flag(pci, val)	(pci->drvdata->flags & val)
> 
> @@ -1012,22 +1011,6 @@ static void imx_pcie_host_exit(struct dw_pcie_rp
> *pp)
>  		regulator_disable(imx_pcie->vpcie);
>  }
> 
> -static u64 imx_pcie_cpu_addr_fixup(struct dw_pcie *pcie, u64 cpu_addr) -{
> -	struct imx_pcie *imx_pcie = to_imx_pcie(pcie);
> -	struct dw_pcie_rp *pp = &pcie->pp;
> -	struct resource_entry *entry;
> -
> -	if (!(imx_pcie->drvdata->flags & IMX_PCIE_FLAG_CPU_ADDR_FIXUP))
> -		return cpu_addr;
> -
> -	entry = resource_list_first_type(&pp->bridge->windows,
> IORESOURCE_MEM);
> -	if (!entry)
> -		return cpu_addr;
> -
> -	return cpu_addr - entry->offset;
> -}
> -
>  static const struct dw_pcie_host_ops imx_pcie_host_ops = {
>  	.init = imx_pcie_host_init,
>  	.deinit = imx_pcie_host_exit,
> @@ -1036,7 +1019,6 @@ static const struct dw_pcie_host_ops
> imx_pcie_host_ops = {  static const struct dw_pcie_ops dw_pcie_ops = {
>  	.start_link = imx_pcie_start_link,
>  	.stop_link = imx_pcie_stop_link,
> -	.cpu_addr_fixup = imx_pcie_cpu_addr_fixup,
>  };
> 
>  static void imx_pcie_ep_init(struct dw_pcie_ep *ep) @@ -1446,6 +1428,7
> @@ static int imx_pcie_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
> 
> +	pci->using_dtbus_info = true;
>  	if (imx_pcie->drvdata->mode == DW_PCIE_EP_TYPE) {
>  		ret = imx_add_pcie_ep(imx_pcie, pdev);
>  		if (ret < 0)
> @@ -1585,8 +1568,7 @@ static const struct imx_pcie_drvdata drvdata[] = {
>  	},
>  	[IMX8Q] = {
>  		.variant = IMX8Q,
> -		.flags = IMX_PCIE_FLAG_HAS_PHYDRV |
> -			 IMX_PCIE_FLAG_CPU_ADDR_FIXUP,
> +		.flags = IMX_PCIE_FLAG_HAS_PHYDRV,
>  		.clk_names = imx8q_clks,
>  		.clks_cnt = ARRAY_SIZE(imx8q_clks),
>  	},
> 
> --
> 2.34.1