netdev - Re: [PATCH 2/2] net: add support for NS8390 based eth controllers on some ColdFire CPU boards

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Date:	Tue, 03 Jul 2012 22:18:11 -0700
From:	Joe Perches <joe@...ches.com>
To:	gerg@...pgear.com
Cc:	netdev@...r.kernel.org, linux-m68k@...r.kernel.org,
	Greg Ungerer <gerg@...inux.org>
Subject: Re: [PATCH 2/2] net: add support for NS8390 based eth controllers
 on some ColdFire CPU boards

On Wed, 2012-07-04 at 14:56 +1000, gerg@...pgear.com wrote:
> From: Greg Ungerer <gerg@...inux.org>
> 
> A number of older ColdFire CPU based boards use NS8390 based network
> controllers. Most use the Davicom 9008F or the UMC 9008F. This driver
> provides the support code to get these devices working on these platforms.

Hi Greg, just some trivia:

[]

> diff --git a/drivers/net/ethernet/8390/mcf8390.c b/drivers/net/ethernet/8390/mcf8390.c

[]

> +#ifdef NE2000_ODDOFFSET
> +/*
> + * A lot of the ColdFire boards use a separate address region for odd offset
> + * register addresses. The following macros and functions convert and map
> + * as required. Note that the data port accesses are treated a little
> + * differently, and always accessed via the insX/outsX functions.
> + */
> +#define	NE_PTR(a)	(((a) & 0x1) ? (NE2000_ODDOFFSET + (a) - 1) : (a))

Maybe use static inlines instead of macros?

static inline void *NE_PTR(void *ptr)
{
	if ((unsigned long)ptr & 1)
		return ptr - 1 + NE2000_ODDOFFSET;
	return ptr;
}

[]

> +static void mcf8390_get_8390_hdr(struct net_device *dev,
> +				 struct e8390_pkt_hdr *hdr, int ring_page)
> +{
[]
> +	/*
> +	 * This *shouldn't* happen.
> +	 * If it does, it's the last thing you'll see
> +	 */
> +	if (ei_status.dmaing) {
> +		netdev_err(dev,
> +			"%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
> +			 __func__, ei_local->dmaing, ei_local->irqlock);

This message seems to get repeated a few times.
Maybe another function/macro or maybe a BUG?

		some_dma_err(dev, __func__, ei_local);

> +static void mcf8390_block_input(struct net_device *dev, int count,
> +				struct sk_buff *skb, int ring_offset)
> +{
[]
> +	/*
> +	 * This *shouldn't* happen.
> +	 * If it does, it's the last thing you'll see
> +	 */
> +	if (ei_local->dmaing) {
> +		netdev_err(dev,
> +			"%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
> +			__func__, ei_local->dmaing, ei_local->irqlock);
> +		return;
> +	}

> +static void mcf8390_block_output(struct net_device *dev, int count,
> +				 const unsigned char *buf,
> +				 const int start_page)
> +{
[]
> +	/*
> +	 *This *shouldn't* happen.
> +	 * If it does, it's the last thing you'll see
> +	 */
> +	if (ei_local->dmaing) {
> +		netdev_err(dev,
> +			"%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
> +			__func__, ei_local->dmaing, ei_local->irqlock);
> +		return;
> +	}

> +static int mcf8390_init(struct net_device *dev)
> +{
> +	static u32 offsets[] = {
> +		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
> +		0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
> +	};

const?  u8?

> +	pr_debug("Found ethernet address: %pM\n", dev->dev_addr);

netdev_dbg ?


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