diff options
| author | Ira Weiny <ira.weiny@intel.com> | 2014-08-09 03:00:55 +0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-08-11 07:36:00 +0400 |
| commit | 0f29b46d49b0ca50536632c6a33986c3171f5ea1 (patch) | |
| tree | 8ce3551b9fd88c7706f68e0e26b915892e204154 /Documentation/infiniband | |
| parent | 9ad13a423484725324fb2c5c5ab527d6bf9d84cc (diff) | |
| download | linux-0f29b46d49b0ca50536632c6a33986c3171f5ea1.tar.xz | |
IB/mad: add new ioctl to ABI to support new registration options
Registrations options are specified through flags. Definitions of flags will
be in subsequent patches.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'Documentation/infiniband')
| -rw-r--r-- | Documentation/infiniband/user_mad.txt | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/Documentation/infiniband/user_mad.txt b/Documentation/infiniband/user_mad.txt index 8a366959f5cc..7aca13a54a3a 100644 --- a/Documentation/infiniband/user_mad.txt +++ b/Documentation/infiniband/user_mad.txt @@ -26,6 +26,11 @@ Creating MAD agents ioctl. Also, all agents registered through a file descriptor will be unregistered when the descriptor is closed. + 2014 -- a new registration ioctl is now provided which allows additional + fields to be provided during registration. + Users of this registration call are implicitly setting the use of + pkey_index (see below). + Receiving MADs MADs are received using read(). The receive side now supports @@ -104,10 +109,10 @@ P_Key Index Handling The old ib_umad interface did not allow setting the P_Key index for MADs that are sent and did not provide a way for obtaining the P_Key index of received MADs. A new layout for struct ib_user_mad_hdr - with a pkey_index member has been defined; however, to preserve - binary compatibility with older applications, this new layout will - not be used unless the IB_USER_MAD_ENABLE_PKEY ioctl is called - before a file descriptor is used for anything else. + with a pkey_index member has been defined; however, to preserve binary + compatibility with older applications, this new layout will not be used + unless one of IB_USER_MAD_ENABLE_PKEY or IB_USER_MAD_REGISTER_AGENT2 ioctl's + are called before a file descriptor is used for anything else. In September 2008, the IB_USER_MAD_ABI_VERSION will be incremented to 6, the new layout of struct ib_user_mad_hdr will be used by |