linux-kernel - Re: [PATCH v9 01/12] PCI: dwc: Fix EP link notification implementation

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Date:   Fri, 13 Jul 2018 13:17:57 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        <bhelgaas@...gle.com>, <lorenzo.pieralisi@....com>,
        <Joao.Pinto@...opsys.com>, <jingoohan1@...il.com>,
        <adouglas@...ence.com>, <jesper.nilsson@...s.com>,
        <shawn.lin@...k-chips.com>
CC:     <linux-pci@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 01/12] PCI: dwc: Fix EP link notification
 implementation



On Monday 09 July 2018 11:12 PM, Gustavo Pimentel wrote:
> Move specific features settings from EP shared code
> (pcie-designware-ep.c) to the driver (pcie-designware-plat.c).
> 
> Previous implementation disables the EP link notification
> by default for all SoCs that uses EP DesignWare IP, which affects
> directly the dra7xx and artpec6 SoCs.
> 
> Signed-off-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>

Acked-by: Kishon Vijay Abraham I <kishon@...com>
> ---
> Change v8->v9:
>  - Created patch file.
> 
>  drivers/pci/controller/dwc/pcie-designware-ep.c   | 14 ++++++--------
>  drivers/pci/controller/dwc/pcie-designware-plat.c |  3 +++
>  2 files changed, 9 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
> index 8650416..04092a7 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-ep.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
> @@ -386,15 +386,18 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  		return -ENOMEM;
>  	ep->outbound_addr = addr;
>  
> -	if (ep->ops->ep_init)
> -		ep->ops->ep_init(ep);
> -
>  	epc = devm_pci_epc_create(dev, &epc_ops);
>  	if (IS_ERR(epc)) {
>  		dev_err(dev, "Failed to create epc device\n");
>  		return PTR_ERR(epc);
>  	}
>  
> +	ep->epc = epc;
> +	epc_set_drvdata(epc, ep);
> +
> +	if (ep->ops->ep_init)
> +		ep->ops->ep_init(ep);
> +
>  	ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
>  	if (ret < 0)
>  		epc->max_functions = 1;
> @@ -413,11 +416,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
>  		return -ENOMEM;
>  	}
>  
> -	epc->features = EPC_FEATURE_NO_LINKUP_NOTIFIER;
> -	EPC_FEATURE_SET_BAR(epc->features, BAR_0);
> -
> -	ep->epc = epc;
> -	epc_set_drvdata(epc, ep);
>  	dw_pcie_setup(pci);
>  
>  	return 0;
> diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
> index 5937fed..0ce3440 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-plat.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
> @@ -70,10 +70,13 @@ static const struct dw_pcie_ops dw_pcie_ops = {
>  static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep)
>  {
>  	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> +	struct pci_epc *epc = ep->epc;
>  	enum pci_barno bar;
>  
>  	for (bar = BAR_0; bar <= BAR_5; bar++)
>  		dw_pcie_ep_reset_bar(pci, bar);
> +
> +	epc->features |= EPC_FEATURE_NO_LINKUP_NOTIFIER;
>  }
>  
>  static int dw_plat_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
>