netdev - RE: [PATCH V11 2/7] net: sxgbe: add basic framework for Samsung 10Gb ethernet driver

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Date:	Sat, 22 Mar 2014 14:12:58 -0700
From:	Byungho An <bh74.an@...sung.com>
To:	'Francois Romieu' <romieu@...zoreil.com>
Cc:	netdev@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	devicetree@...r.kernel.org, 'David Miller' <davem@...emloft.net>,
	'GIRISH K S' <ks.giri@...sung.com>,
	'SIVAREDDY KALLAM' <siva.kallam@...sung.com>,
	'Vipul Chandrakant' <vipul.pandya@...sung.com>,
	'Ilho Lee' <ilho215.lee@...sung.com>
Subject: RE: [PATCH V11 2/7] net: sxgbe: add basic framework for Samsung 10Gb
 ethernet driver


Francois Romieu <romieu@...zoreil.com> wrote :
> Byungho An <bh74.an@...sung.com> :
> [...]
> > +static int sxgbe_init_rx_buffers(struct net_device *dev,
> > +				 struct sxgbe_rx_norm_desc *p, int i,
> > +				 unsigned int dma_buf_sz,
> > +				 struct sxgbe_rx_queue *rx_ring)
> > +{
> > +	struct sxgbe_priv_data *priv = netdev_priv(dev);
> > +	struct sk_buff *skb;
> > +
> > +	skb = __netdev_alloc_skb(dev, dma_buf_sz, GFP_KERNEL);
> > +	if (!skb)
> > +		return -ENOMEM;
> > +
> > +	skb_reserve(skb, NET_IP_ALIGN);
> 
> __netdev_alloc_skb_ip_align
OK.

> 
> [...]
> > +static int sxgbe_platform_probe(struct platform_device *pdev) {
> [...]
> > +	priv = sxgbe_drv_probe(&(pdev->dev), plat_dat, addr);
> > +	if (!priv) {
> > +		pr_err("%s: main driver probe failed\n", __func__);
> > +		return -ENODEV;
> > +	}
> > +
> > +	/* Get MAC address if available (DT) */
> > +	if (mac)
> > +		ether_addr_copy(priv->dev->dev_addr, mac);
> > +
> > +	/* Get the SXGBE common INT information */
> > +	priv->irq  = platform_get_irq(pdev, loop++);
> > +	if (priv->irq <= 0) {
> > +		dev_err(dev, "sxgbe common irq parsing failed\n");
> > +		sxgbe_drv_remove(ndev);
> > +		return -EINVAL;
> > +	}
> > +
> > +	/* Get the TX/RX IRQ numbers */
> > +	for (i = 0, chan = 0; i < SXGBE_TX_QUEUES; i++) {
> > +		priv->txq[i]->irq_no = irq_of_parse_and_map(node, chan++);
> > +		if (priv->txq[i]->irq_no <= 0) {
> > +			dev_err(dev, "sxgbe tx irq parsing failed\n");
> > +			return -EINVAL;
> > +		}
> > +	}
> > +
> > +	for (i = 0; i < SXGBE_RX_QUEUES; i++) {
> > +		priv->rxq[i]->irq_no = irq_of_parse_and_map(node, chan++);
> > +		if (priv->rxq[i]->irq_no <= 0) {
> > +			dev_err(dev, "sxgbe rx irq parsing failed\n");
> > +			return -EINVAL;
> > +		}
> > +	}
> 
> The error path should use sxgbe_drv_remove.
> 
> It should use irq_dispose_mapping as well to unwind irq_create_mapping
> (called by irq_of_parse_and_map).
OK

> 
> [...]
> > +int sxgbe_xpcs_init(struct net_device *ndev) {
> > +	u32 value;
> > +
> > +	value = sxgbe_xpcs_read(ndev, SR_PCS_MMD_CONTROL1);
> > +	/* 10G XAUI mode */
> > +	sxgbe_xpcs_write(ndev, SR_PCS_CONTROL2, XPCS_TYPE_SEL_X);
> > +	sxgbe_xpcs_write(ndev, VR_PCS_MMD_XAUI_MODE_CONTROL,
> XPCS_XAUI_MODE);
> > +	sxgbe_xpcs_write(ndev, VR_PCS_MMD_XAUI_MODE_CONTROL,
> value | BIT(13));
> > +	sxgbe_xpcs_write(ndev, SR_PCS_MMD_CONTROL1, value | BIT(11));
> > +
> > +	do {
> > +		value = sxgbe_xpcs_read(ndev,
> VR_PCS_MMD_DIGITAL_STATUS);
> > +
> > +	} while ((value & XPCS_QSEQ_STATE_MPLLOFF) ==
> > +XPCS_QSEQ_STATE_STABLE);
> 
> Excess empty line.
OK.

Thanks
> 
> --
> Ueimor

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