1SYSFS FILES
2
3  For each InfiniBand device, the InfiniBand drivers create the
4  following files under /sys/class/infiniband/<device name>:
5
6    node_type      - Node type (CA, switch or router)
7    node_guid      - Node GUID
8    sys_image_guid - System image GUID
9
10  In addition, there is a "ports" subdirectory, with one subdirectory
11  for each port.  For example, if mthca0 is a 2-port HCA, there will
12  be two directories:
13
14    /sys/class/infiniband/mthca0/ports/1
15    /sys/class/infiniband/mthca0/ports/2
16
17  (A switch will only have a single "0" subdirectory for switch port
18  0; no subdirectory is created for normal switch ports)
19
20  In each port subdirectory, the following files are created:
21
22    cap_mask       - Port capability mask
23    lid            - Port LID
24    lid_mask_count - Port LID mask count
25    rate           - Port data rate (active width * active speed)
26    sm_lid         - Subnet manager LID for port's subnet
27    sm_sl          - Subnet manager SL for port's subnet
28    state          - Port state (DOWN, INIT, ARMED, ACTIVE or ACTIVE_DEFER)
29    phys_state     - Port physical state (Sleep, Polling, LinkUp, etc)
30
31  There is also a "counters" subdirectory, with files
32
33    VL15_dropped
34    excessive_buffer_overrun_errors
35    link_downed
36    link_error_recovery
37    local_link_integrity_errors
38    port_rcv_constraint_errors
39    port_rcv_data
40    port_rcv_errors
41    port_rcv_packets
42    port_rcv_remote_physical_errors
43    port_rcv_switch_relay_errors
44    port_xmit_constraint_errors
45    port_xmit_data
46    port_xmit_discards
47    port_xmit_packets
48    symbol_error
49
50  Each of these files contains the corresponding value from the port's
51  Performance Management PortCounters attribute, as described in
52  section 16.1.3.5 of the InfiniBand Architecture Specification.
53
54  The "pkeys" and "gids" subdirectories contain one file for each
55  entry in the port's P_Key or GID table respectively.  For example,
56  ports/1/pkeys/10 contains the value at index 10 in port 1's P_Key
57  table.
58
59MTHCA
60
61  The Mellanox HCA driver also creates the files:
62
63    hw_rev   - Hardware revision number
64    fw_ver   - Firmware version
65    hca_type - HCA type: "MT23108", "MT25208 (MT23108 compat mode)",
66               or "MT25208"
67