netdev - Re: [PATCH V5] bgmac: driver for GBit MAC core on BCMA bus

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Message-Id: <20130108.175520.708710866856394716.davem@davemloft.net>
Date:	Tue, 08 Jan 2013 17:55:20 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	zajec5@...il.com
Cc:	netdev@...r.kernel.org, romieu@...zoreil.com, joe@...ches.com
Subject: Re: [PATCH V5] bgmac: driver for GBit MAC core on BCMA bus

From: Rafa┅ Mi┅ecki <zajec5@...il.com>
Date: Tue,  8 Jan 2013 07:34:48 +0100

> BCMA is a Broadcom specific bus with devices AKA cores. All recent BCMA
> based SoCs have gigabit ethernet provided by the GBit MAC core. This
> patch adds driver for such a cores registering itself as a netdev. It
> has been tested on a BCM4706 and BCM4718 chipsets.
> 
> In the kernel tree there is already b44 driver which has some common
> things with bgmac, however there are many differences that has led to
> the decision or writing a new driver:
> 1) GBit MAC cores appear on BCMA bus (not SSB as in case of b44)
> 2) There is 64bit DMA engine which differs from 32bit one
> 3) There is no CAM (Content Addressable Memory) in GBit MAC
> 4) We have 4 TX queues on GBit MAC devices (instead of 1)
> 5) Many registers have different addresses/values
> 6) RX header flags are also different
> 
> The driver in it's state is functional how, however there is of course
> place for improvements:
> 1) Supporting more net_device_ops
> 2) SUpporting more ethtool_ops
> 3) Unaligned addressing in DMA
> 4) Writing separated PHY driver
> 
> Signed-off-by: Rafa┅ Mi┅ecki <zajec5@...il.com>

This patch doesn't apply to the net-next tree, please re-spin.
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