netdev - Re: [PATCH 4/8] s2io: convert to set_phys

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Date:	Tue, 05 Apr 2011 00:17:16 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Jon Mason <jdmason@...zu.us>, netdev@...r.kernel.org
Subject: Re: [PATCH 4/8] s2io: convert to set_phys_id

On Mon, 2011-04-04 at 14:06 -0700, Stephen Hemminger wrote:
> plain text document attachment (s2io-set-phys.patch)
> Convert to new ethtool set physical id model. Remove no longer used
> timer, and fix docbook comment.
> 
> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
> 
> 
> --- a/drivers/net/s2io.c	2011-04-04 12:56:26.680911740 -0700
> +++ b/drivers/net/s2io.c	2011-04-04 13:12:34.591276022 -0700
> @@ -5484,53 +5484,50 @@ static void s2io_ethtool_gregs(struct ne
>  	}
>  }
>  
> -/**
> - *  s2io_phy_id  - timer function that alternates adapter LED.
> - *  @data : address of the private member of the device structure, which
> - *  is a pointer to the s2io_nic structure, provided as an u32.
> - * Description: This is actually the timer function that alternates the
> - * adapter LED bit of the adapter control bit to set/reset every time on
> - * invocation. The timer is set for 1/2 a second, hence tha NIC blinks
> - *  once every second.
> +/*
> + *  s2io_set_led - control NIC led
>   */
> -static void s2io_phy_id(unsigned long data)
> +static void s2io_set_led(struct s2io_nic *sp, bool on)
>  {
> -	struct s2io_nic *sp = (struct s2io_nic *)data;
>  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
> -	u64 val64 = 0;
> -	u16 subid;
> +	u16 subid = sp->pdev->subsystem_device;
> +	u64 val64;
>  
> -	subid = sp->pdev->subsystem_device;
>  	if ((sp->device_type == XFRAME_II_DEVICE) ||
>  	    ((subid & 0xFF) >= 0x07)) {
>  		val64 = readq(&bar0->gpio_control);
> -		val64 ^= GPIO_CTRL_GPIO_0;
> +		if (on)
> +			val64 |= GPIO_CTRL_GPIO_0;
> +		else
> +			val64 &= ~GPIO_CTRL_GPIO_0;
> +
>  		writeq(val64, &bar0->gpio_control);
>  	} else {
>  		val64 = readq(&bar0->adapter_control);
> -		val64 ^= ADAPTER_LED_ON;
> +		if (on)
> +			val64 |= ADAPTER_LED_ON;
> +		else
> +			val64 &= ~ADAPTER_LED_ON;
> +
>  		writeq(val64, &bar0->adapter_control);
>  	}
>  
> -	mod_timer(&sp->id_timer, jiffies + HZ / 2);
>  }
>  
>  /**
> - * s2io_ethtool_idnic - To physically identify the nic on the system.
> - * @sp : private member of the device structure, which is a pointer to the
> - * s2io_nic structure.
> - * @id : pointer to the structure with identification parameters given by
> - * ethtool.
> + * s2io_ethtool_set_led - To physically identify the nic on the system.
> + * @dev : network device
> + * @state: led setting
> + *
>   * Description: Used to physically identify the NIC on the system.
>   * The Link LED will blink for a time specified by the user for
>   * identification.
>   * NOTE: The Link has to be Up to be able to blink the LED. Hence
>   * identification is possible only if it's link is up.
> - * Return value:
> - * int , returns 0 on success
>   */
>  
> -static int s2io_ethtool_idnic(struct net_device *dev, u32 data)
> +static int s2io_ethtool_set_led(struct net_device *dev,
> +				enum ethtool_phys_id_state state)
>  {
>  	u64 val64 = 0, last_gpio_ctrl_val;
>  	struct s2io_nic *sp = netdev_priv(dev);
> @@ -5543,24 +5540,27 @@ static int s2io_ethtool_idnic(struct net
>  		val64 = readq(&bar0->adapter_control);
>  		if (!(val64 & ADAPTER_CNTL_EN)) {
>  			pr_err("Adapter Link down, cannot blink LED\n");
> -			return -EFAULT;
> +			return -EAGAIN;
>  		}
>  	}
> -	if (sp->id_timer.function == NULL) {
> -		init_timer(&sp->id_timer);
> -		sp->id_timer.function = s2io_phy_id;
> -		sp->id_timer.data = (unsigned long)sp;
> -	}
> -	mod_timer(&sp->id_timer, jiffies);
> -	if (data)
> -		msleep_interruptible(data * HZ);
> -	else
> -		msleep_interruptible(MAX_FLICKER_TIME);
> -	del_timer_sync(&sp->id_timer);
>  
> -	if (CARDS_WITH_FAULTY_LINK_INDICATORS(sp->device_type, subid)) {
> -		writeq(last_gpio_ctrl_val, &bar0->gpio_control);
> -		last_gpio_ctrl_val = readq(&bar0->gpio_control);
> +	switch (state) {
> +	case ETHTOOL_ID_ACTIVE:
> +		return -EINVAL;
> +
> +	case ETHTOOL_ID_ON:
> +		s2io_set_led(sp, true);
> +		break;
> +
> +	case ETHTOOL_ID_OFF:
> +		s2io_set_led(sp, false);
> +		break;
> +
> +	case ETHTOOL_ID_INACTIVE:
> +		if (CARDS_WITH_FAULTY_LINK_INDICATORS(sp->device_type, subid)) {
> +			writeq(last_gpio_ctrl_val, &bar0->gpio_control);
> +			last_gpio_ctrl_val = readq(&bar0->gpio_control);
[...]

I think last_gpio_ctrl_val needs to be moved to struct s2io_nic and
initialised only in the ETHTOOL_ID_ACTIVE case.

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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