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| -rw-r--r-- | Documentation/infiniband/user_mad.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/infiniband/user_mad.txt b/Documentation/infiniband/user_mad.txt index 750fe5e..8ec54b9 100644 --- a/Documentation/infiniband/user_mad.txt +++ b/Documentation/infiniband/user_mad.txt @@ -91,6 +91,14 @@ Sending MADs if (ret != sizeof *mad + mad_length) perror("write"); +Transaction IDs + + Users of the umad devices can use the lower 32 bits of the + transaction ID field (that is, the least significant half of the + field in network byte order) in MADs being sent to match + request/response pairs. The upper 32 bits are reserved for use by + the kernel and will be overwritten before a MAD is sent. + Setting IsSM Capability Bit To set the IsSM capability bit for a port, simply open the |