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| author | Jack Morgenstein <jackm@dev.mellanox.co.il> | 2016-11-10 09:30:57 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-26 07:24:35 (GMT) |
| commit | 1039b7f5c7ef027279a2f554e31bcb529163d335 (patch) | |
| tree | 71cd499d8b4e0a2168d7e8b8caea90c0d94aa3e7 /drivers/infiniband/hw/mlx4 | |
| parent | 618d14b01a45cb0fbfe5ad1177699e4a49dec237 (diff) | |
| download | linux-1039b7f5c7ef027279a2f554e31bcb529163d335.tar.xz | |
IB/mlx4: Handle well-known-gid in mad_demux processing
commit befcabcd530e4ffb6f016638f693b7d94986d2ba upstream.
If OpenSM runs over a ConnectX-3, and there are ConnectX-4 or Connect-IB
VFs active on the network, the OpenSM will receive QP1 packets containing
a GRH where the destination GID is the "Well-Known GID" -- which is not a
GID in the HCA Port's GID Table.
This GID must be tested-for separately -- and packets which contain
this destination GID should be routed to slave 0 (the PF).
Fixes: 37bfc7c1e83f ('IB/mlx4: SR-IOV multiplex and demultiplex MADs')
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/infiniband/hw/mlx4')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/mad.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c index 1672907..18d309e 100644 --- a/drivers/infiniband/hw/mlx4/mad.c +++ b/drivers/infiniband/hw/mlx4/mad.c @@ -702,10 +702,18 @@ static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port, /* If a grh is present, we demux according to it */ if (wc->wc_flags & IB_WC_GRH) { - slave = mlx4_ib_find_real_gid(ibdev, port, grh->dgid.global.interface_id); - if (slave < 0) { - mlx4_ib_warn(ibdev, "failed matching grh\n"); - return -ENOENT; + if (grh->dgid.global.interface_id == + cpu_to_be64(IB_SA_WELL_KNOWN_GUID) && + grh->dgid.global.subnet_prefix == cpu_to_be64( + atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix))) { + slave = 0; + } else { + slave = mlx4_ib_find_real_gid(ibdev, port, + grh->dgid.global.interface_id); + if (slave < 0) { + mlx4_ib_warn(ibdev, "failed matching grh\n"); + return -ENOENT; + } } } /* Class-specific handling */ |