The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/net/hisilicon-hns-nic.txt

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    1 Hisilicon Network Subsystem NIC controller
    2 
    3 Required properties:
    4 - compatible: "hisilicon,hns-nic-v1" or "hisilicon,hns-nic-v2".
    5   "hisilicon,hns-nic-v1" is for hip05.
    6   "hisilicon,hns-nic-v2" is for Hi1610 and Hi1612.
    7 - ae-handle: accelerator engine handle for hns,
    8   specifies a reference to the associating hardware driver node.
    9   see Documentation/devicetree/bindings/net/hisilicon-hns-dsaf.txt
   10 - port-id: is the index of port provided by DSAF (the accelerator). DSAF can
   11   connect to 8 PHYs. Port 0 to 1 are both used for administration purpose. They
   12   are called debug ports.
   13 
   14   The remaining 6 PHYs are taken according to the mode of DSAF.
   15 
   16   In NIC mode of DSAF, all 6 PHYs are taken as ethernet ports to the CPU. The
   17   port-id can be 2 to 7. Here is the diagram:
   18             +-----+---------------+
   19             |            CPU      |
   20             +-+-+-+---+-+-+-+-+-+-+
   21               | |     | | | | | |
   22              debug       service
   23              port         port
   24              (0,1)       (2-7)
   25 
   26   In Switch mode of DSAF, all 6 PHYs are taken as physical ports connect to a
   27   LAN Switch while the CPU side assume itself have one single NIC connect to
   28   this switch. In this case, the port-id will be 2 only.
   29             +-----+---------------+
   30             |            CPU      |
   31             +-+-+-+---+-+-+-+-+-+-+
   32               | |   service| port(2)
   33              debug   +------------+
   34              port    |   switch   |
   35              (0,1)   +-+-+-+-+-+-++
   36                        | | | | | |
   37                       external port
   38 
   39   This attribute is remained for compatible purpose. It is not recommended to
   40   use it in new code.
   41 
   42 - port-idx-in-ae: is the index of port provided by AE.
   43   In NIC mode of DSAF, all 6 PHYs of service DSAF are taken as ethernet ports
   44   to the CPU. The port-idx-in-ae can be 0 to 5. Here is the diagram:
   45             +-----+---------------+
   46             |            CPU      |
   47             +-+-+-+---+-+-+-+-+-+-+
   48               |    |   | | | | | |
   49            debug debug   service
   50            port  port     port
   51            (0)   (0)     (0-5)
   52 
   53   In Switch mode of DSAF, all 6 PHYs of service DSAF are taken as physical
   54   ports connected to a LAN Switch while the CPU side assume itself have one
   55   single NIC connected to this switch. In this case, the port-idx-in-ae
   56   will be 0 only.
   57             +-----+-----+------+------+
   58             |                CPU      |
   59             +-+-+-+-+-+-+-+-+-+-+-+-+-+
   60               |    |     service| port(0)
   61             debug debug  +------------+
   62             port  port   |   switch   |
   63             (0)   (0)    +-+-+-+-+-+-++
   64                           | | | | | |
   65                          external port
   66 
   67 - local-mac-address: mac addr of the ethernet interface
   68 
   69 Example:
   70 
   71         ethernet@0{
   72                 compatible = "hisilicon,hns-nic-v1";
   73                 ae-handle = <&dsaf0>;
   74                 port-idx-in-ae = <0>;
   75                 local-mac-address = [a2 14 e4 4b 56 76];
   76         };

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