From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: ANNOUNCE: igb: Intel 82575 Gigabit Ethernet driver (PCI-Express) Date: Wed, 18 Jul 2007 23:00:39 -0400 Message-ID: <469ED3D7.6040905@garzik.org> References: <46980ADA.5050104@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: NetDev , Arjan van de Ven , "Ronciak, John" , Mitch Williams To: "Kok, Auke" Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:35139 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759332AbXGSDAm (ORCPT ); Wed, 18 Jul 2007 23:00:42 -0400 In-Reply-To: <46980ADA.5050104@intel.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Kok, Auke wrote: > > > All, > > We are pleased to announce a new Gigabit Ethernet product and its driver > to the > linux community. This product is the Intel(R) 82575 Gigabit Ethernet > adapter > family. Physical adapters will be available to the public soon. These > adapters > come in 2- and 4-port versions (copper PHY) currently. Other variants > will be > available later. > > The 82575 chipset supports significantly different features that warrant > a new > driver. The descriptor format is (just like the ixgbe driver) different. > The > device can use multiple MSI-X vectors and multiple queues for both send and > receive. This allows us to optimize some of the driver code specifically > as well > compared to the e1000-supported devices. > > This driver was forked from e1000 several months ago and extensively > reworked > and cleaned up since. The driver was also tested on several platforms in > our > validation labs. > > Allthough some of the codebase is currently shared with the e1000 driver > (this > igb driver has a copy of that code where needed), we realize that many > of the > changes that we are discussing for e1000 (the pci-express adapters that > e1000 > supports particularly) will also apply to this driver. However, since > this is a > completely new driver that is relatively free of all old NIC support, we > feel > that it is currently the right time to post this driver. > > Unfortunately, the patch to insert this driver is too large to send to > netdev. I > have therefore posted the patch on http: > > http://foo-projects.org/~sofar/igb.patch [558K] > http://foo-projects.org/~sofar/igb.patch.bz2 [98K] Just took a look at this. This has the same problem as in the other thread -- huge internal API -- except this time, the problem is emphasized by the fact that the majority of the API hooks only have a single user, making each hook and API entry point demonstrably useless overhead. Please remove the useless internal API and resubmit. PLEASE take a look at how bnx2 and tg3 are structured. Jeff