diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_common.h')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_common.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_common.h b/drivers/infiniband/hw/ipath/ipath_common.h index 12e1349cd03..f70788c25ea 100644 --- a/drivers/infiniband/hw/ipath/ipath_common.h +++ b/drivers/infiniband/hw/ipath/ipath_common.h @@ -501,13 +501,30 @@ struct __ipath_sendpkt { struct ipath_iovec sps_iov[4]; }; -/* Passed into diag data special file's ->write method. */ +/* + * diagnostics can send a packet by "writing" one of the following + * two structs to diag data special file + * The first is the legacy version for backward compatibility + */ struct ipath_diag_pkt { __u32 unit; __u64 data; __u32 len; }; +/* The second diag_pkt struct is the expanded version that allows + * more control over the packet, specifically, by allowing a custom + * pbc (+ extra) qword, so that special modes and deliberate + * changes to CRCs can be used. The elements were also re-ordered + * for better alignment and to avoid padding issues. + */ +struct ipath_diag_xpkt { + __u64 data; + __u64 pbc_wd; + __u32 unit; + __u32 len; +}; + /* * Data layout in I2C flash (for GUID, etc.) * All fields are little-endian binary unless otherwise stated |