[PATCH v2 0/4] NC-SI PHY Support

[Samuel Mendoza-Jonas <sam@mendozajonas.com>]

This series introduces support for the NC-SI protocol to u-boot,
functionality which so far has only been available in vendor trees.

NC-SI (Network Controller Sideband Interface) is a protocol to manage a
sideband connection to a proper network interface, for example a BMC
(Baseboard Management Controller) sharing the NIC of the host system.
Probing and configuration occurs by communicating with the "remote" NIC
via NC-SI control frames (Ethernet header 0x88f8).

Since the RFC[0] the changes have been split out into a few different
patches to make the overall changes more obvious. Additionally a few
small improvements have been added including adding a check to see if
NC-SI is already configured, and marking the PHY bus "reset" as invalid
since it does not define a bus.

An example of NC-SI setup before a normal network command:

=> dhcp
net_loop: configuring NCSI first
ethernet@1e660000: link up, 100 Mbps full-duplex mac:0c:c4:7a:d5:48:43
NCSI: probing channels
NCSI: configuring channel 0
NCSI: configuration done!
BOOTP broadcast 1
BOOTP broadcast 2
DHCP client bound to address 10.61.161.188 (255 ms)

[0]: https://patchwork.ozlabs.org/patch/1107087/

Changes in v2:
- Fix endianess issue when setting MAC address
- Make checksum offsets easier to read
- Instantiate per-phy ncsi_priv structures
- Update ncsi command help text
- Used update ncsi-pkt.h version to include SPDX header


Samuel Mendoza-Jonas (4):
  phy: Add support for the NC-SI protocol
  phy: Include NC-SI in phy setup
  net/ftgmac100: Add NC-SI mode support
  net: NC-SI setup and handling

 cmd/Kconfig              |   8 +
 cmd/net.c                |  18 +
 drivers/net/ftgmac100.c  |  39 +-
 drivers/net/phy/Kconfig  |   4 +
 drivers/net/phy/Makefile |   1 +
 drivers/net/phy/ncsi.c   | 896 +++++++++++++++++++++++++++++++++++++++
 drivers/net/phy/phy.c    |   7 +
 include/net.h            |   3 +-
 include/net/ncsi-pkt.h   | 442 +++++++++++++++++++
 include/net/ncsi.h       |  14 +
 include/phy.h            |  12 +
 include/phy_interface.h  |   2 +
 net/net.c                |  27 +-
 13 files changed, 1461 insertions(+), 12 deletions(-)
 create mode 100644 drivers/net/phy/ncsi.c
 create mode 100644 include/net/ncsi-pkt.h
 create mode 100644 include/net/ncsi.h

-- 
2.21.0