netdev - Re: [PATCH net v4] r8169: Add EEPROM support and disable MWI on pci express.

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Date:	Sun, 7 Feb 2016 21:10:14 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Corcodel Marian <asd@...ian1000.go.ro>, netdev@...r.kernel.org
Subject: Re: [PATCH net v4] r8169: Add EEPROM support and disable MWI on pci
 express.

Hello.

On 02/07/2016 08:38 PM, Corcodel Marian wrote:

>    On chip with external eeprom ASPM settings is loaded from eeprom and
>     on pci express interface not support MWI.

    Does not support.

>
> Signed-off-by: Corcodel Marian <asd@...ian1000.go.ro>
> ---
>   drivers/net/ethernet/realtek/r8169.c | 22 ++++++++++++++--------
>   1 file changed, 14 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
> index 1d119a6..bebd550 100644
> --- a/drivers/net/ethernet/realtek/r8169.c
> +++ b/drivers/net/ethernet/realtek/r8169.c
[...]
> @@ -4372,7 +4373,8 @@ static void rtl8169_release_board(struct pci_dev *pdev, struct net_device *dev,
>   {
>   	iounmap(ioaddr);
>   	pci_release_regions(pdev);
> -	pci_clear_mwi(pdev);
> +	if (!pci_is_pcie(pdev))
> +	 pci_clear_mwi(pdev);

    Please indent with tab, not space.

>   	pci_disable_device(pdev);
>   	free_netdev(dev);
>   }
> @@ -8042,7 +8044,7 @@ static const struct rtl_cfg_info {
>   		.align		= 8,
>   		.event_slow	= SYSErr | LinkChg | RxOverflow | RxFIFOOver |
>   				  PCSTimeout | SWInt | TxDescUnavail,
> -		.features	= RTL_FEATURE_MSI,
> +		.features	= RTL_FEATURE_MSI | RTL_FEATURE_EEPROM,
>   		.default_ver	= RTL_GIGA_MAC_VER_13,
>   	}
>   };
> @@ -8151,6 +8153,7 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>   {
>   	const struct rtl_cfg_info *cfg = rtl_cfg_infos + ent->driver_data;
>   	const unsigned int region = cfg->region;
> +	unsigned features = cfg->features;

    Not sure you need this variable.

>   	struct rtl8169_private *tp;
>   	struct mii_if_info *mii;
>   	struct net_device *dev;
> @@ -8186,8 +8189,10 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>
>   	/* disable ASPM completely as that cause random device stop working
>   	 * problems as well as full system hangs for some PCIe devices users */
> -	pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
> -				     PCIE_LINK_STATE_CLKPM);
> +	if (!(features & RTL_FEATURE_EEPROM))
> +		pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S |
> +					PCIE_LINK_STATE_L1 |
> +				     	PCIE_LINK_STATE_CLKPM);

    The continuation likes should start under 'pdev', that's a style used by 
the networking code.

>
>   	mdelay(RTL8169_EE_TIMEOUT);
>   	/* enable device (incl. PCI PM wakeup and hotplug setup) */
> @@ -8196,10 +8201,10 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
>   		netif_err(tp, probe, dev, "enable failure\n");
>   		goto err_out_free_dev_1;
>   	}
> -
> -	if (pci_set_mwi(pdev) < 0)
> +	if (!pci_is_pcie(pdev)) {
> +	 if (pci_set_mwi(pdev) < 0)

    Please indent with tab, not space.

>   		netif_info(tp, probe, dev, "Mem-Wr-Inval unavailable\n");
> -
> +        }
>   	/* make sure PCI base addr 1 is MMIO */
>   	if (!(pci_resource_flags(pdev, region) & IORESOURCE_MEM)) {
>   		netif_err(tp, probe, dev,
> @@ -8462,7 +8467,8 @@ err_out_msi_4:
>   err_out_free_res_3:
>   	pci_release_regions(pdev);
>   err_out_mwi_2:
> -	pci_clear_mwi(pdev);
> +        if (!pci_is_pcie(pdev))
> +	 pci_clear_mwi(pdev);

    Please indent properly.

[...]

MBR, Sergei