xref: /freebsd/sys/contrib/device-tree/Bindings/net/hisilicon-hns-nic.txt (revision 3c4ba5f55438f7afd4f4b0b56f88f2bb505fd6a6) 
1Hisilicon Network Subsystem NIC controller
2
3Required 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
69Example:
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	};
77