Subject: RFC: igb: Intel 82575 gigabit ethernet driver (take #2)

From: "Kok, Auke" <[email-masked]>
Date: Tue, 11 Dec 2007 14:34:34 -0800

All,

here is the second version of the igb (82575) ethernet controller driver. This
driver was previously posted 2007-07-13. Many comments received were addressed:

- removed indirection wrappers in the same way as e1000e and ixgbe.
- cleaned up largely against sparse, checkpatch
- removed module parameters and moved functionality to ethtool ioctls
- new NAPI API rewrites
- by default the driver runs in multiqueue mode with 2 to 40 RX queues enabled.

Since the driver is still too large (allthough the patch shrunk from 558k to 416k,
almost 34% of its size) to post to this list I am attaching the bzipped patch
here. You can get the same driver alternatively from here:

http://foo-projects.org/~sofar/0001-igb-PCI-Express-82575-Gigabit-Ethernet-driver.patch
[416k]
http://foo-projects.org/~sofar/0001-igb-PCI-Express-82575-Gigabit-Ethernet-driver.patch.bz2
[74k]

or through git:
    git://lost.foo-projects.org/~ahkok/git/linux-2.6 #igb

There are several concerns still open for this driver:
- namespace collisions with e1000. Since there are cleanups planned for e1000
since pci-e hardware is now moved to e1000e, this might resolve them.
- hardware code is still a large API. we're expecting more hardware to be
supported by this driver in the future and it's not certain which parts we need to
keep or not.

Please review,

Cheers,

Auke

---
>>From 02d13aaf92470678aaeb739f0b6e4c9f9687c7b8 Mon Sep 17 00:00:00 2001
From: Auke Kok <[email-masked]>
Date: Thu, 6 Dec 2007 15:08:14 -0800
Subject: [PATCH] igb: PCI-Express 82575 Gigabit Ethernet driver

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 version of the igb driver no lnger uses fake netdevices and
incorporates napi_struct members for each ring to do the multi-
queue polling. multi-queue is enabled by default and the driver
supports NAPI mode only.

Signed-off-by: Auke Kok <[email-masked]>
---
 drivers/net/Kconfig             |   22 +
 drivers/net/Makefile            |    1 +
 drivers/net/igb/Makefile        |   37 +
 drivers/net/igb/e1000_82575.c   | 1269 ++++++++++++
 drivers/net/igb/e1000_82575.h   |  198 ++
 drivers/net/igb/e1000_defines.h |  772 ++++++++
 drivers/net/igb/e1000_hw.h      |  599 ++++++
 drivers/net/igb/e1000_mac.c     | 1505 ++++++++++++++
 drivers/net/igb/e1000_mac.h     |   98 +
 drivers/net/igb/e1000_nvm.c     |  605 ++++++
 drivers/net/igb/e1000_nvm.h     |   40 +
 drivers/net/igb/e1000_phy.c     | 1807 +++++++++++++++++
 drivers/net/igb/e1000_phy.h     |   98 +
 drivers/net/igb/e1000_regs.h    |  277 +++
 drivers/net/igb/igb.h           |  300 +++
 drivers/net/igb/igb_ethtool.c   | 1926 ++++++++++++++++++
 drivers/net/igb/igb_main.c      | 4110 +++++++++++++++++++++++++++++++++++++++
 17 files changed, 13664 insertions(+), 0 deletions(-)
 create mode 100644 drivers/net/igb/Makefile
 create mode 100644 drivers/net/igb/e1000_82575.c
 create mode 100644 drivers/net/igb/e1000_82575.h
 create mode 100644 drivers/net/igb/e1000_defines.h
 create mode 100644 drivers/net/igb/e1000_hw.h
 create mode 100644 drivers/net/igb/e1000_mac.c
 create mode 100644 drivers/net/igb/e1000_mac.h
 create mode 100644 drivers/net/igb/e1000_nvm.c
 create mode 100644 drivers/net/igb/e1000_nvm.h
 create mode 100644 drivers/net/igb/e1000_phy.c
 create mode 100644 drivers/net/igb/e1000_phy.h
 create mode 100644 drivers/net/igb/e1000_regs.h
 create mode 100644 drivers/net/igb/igb.h
 create mode 100644 drivers/net/igb/igb_ethtool.c
 create mode 100644 drivers/net/igb/igb_main.c