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author | Moni Shoua <monis@voltaire.com> | 2009-01-28 14:54:35 -0800 |
---|---|---|
committer | Roland Dreier <rolandd@cisco.com> | 2009-01-28 14:54:35 -0800 |
commit | f0f6f346a1edaec23b990c25f53478669e56fa70 (patch) | |
tree | 874c70fae081386ca3408c358f14de231edf68ce /drivers/infiniband | |
parent | f3b8436ad9a8ad36b3c9fa1fe030c7f38e5d3d0b (diff) | |
download | linux-3.10-f0f6f346a1edaec23b990c25f53478669e56fa70.tar.gz linux-3.10-f0f6f346a1edaec23b990c25f53478669e56fa70.tar.bz2 linux-3.10-f0f6f346a1edaec23b990c25f53478669e56fa70.zip |
IB/mlx4: Fix dispatch of IB_EVENT_LID_CHANGE event
When snooping a PortInfo MAD, its client_reregister bit is checked.
If the bit is ON then a CLIENT_REREGISTER event is dispatched,
otherwise a LID_CHANGE event is dispatched. This way of decision
ignores the cases where the MAD changes the LID along with an
instruction to reregister (so a necessary LID_CHANGE event won't be
dispatched) or the MAD is neither of these (and an unnecessary
LID_CHANGE event will be dispatched).
This causes problems at least with IPoIB, which will do a "light"
flush on reregister, rather than the "heavy" flush required due to a
LID change.
Fix this by dispatching a CLIENT_REREGISTER event if the
client_reregister bit is set, but also compare the LID in the MAD to
the current LID. If and only if they are not identical then a
LID_CHANGE event is dispatched.
Signed-off-by: Moni Shoua <monis@voltaire.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Yossi Etigin <yosefe@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r-- | drivers/infiniband/hw/mlx4/mad.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c index 606f1e2ef28..19e68ab6616 100644 --- a/drivers/infiniband/hw/mlx4/mad.c +++ b/drivers/infiniband/hw/mlx4/mad.c @@ -147,7 +147,8 @@ static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl) * Snoop SM MADs for port info and P_Key table sets, so we can * synthesize LID change and P_Key change events. */ -static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad) +static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad, + u16 prev_lid) { struct ib_event event; @@ -157,6 +158,7 @@ static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad) if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) { struct ib_port_info *pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data; + u16 lid = be16_to_cpu(pinfo->lid); update_sm_ah(to_mdev(ibdev), port_num, be16_to_cpu(pinfo->sm_lid), @@ -165,12 +167,15 @@ static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad) event.device = ibdev; event.element.port_num = port_num; - if (pinfo->clientrereg_resv_subnetto & 0x80) + if (pinfo->clientrereg_resv_subnetto & 0x80) { event.event = IB_EVENT_CLIENT_REREGISTER; - else - event.event = IB_EVENT_LID_CHANGE; + ib_dispatch_event(&event); + } - ib_dispatch_event(&event); + if (prev_lid != lid) { + event.event = IB_EVENT_LID_CHANGE; + ib_dispatch_event(&event); + } } if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) { @@ -228,8 +233,9 @@ int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh, struct ib_mad *in_mad, struct ib_mad *out_mad) { - u16 slid; + u16 slid, prev_lid = 0; int err; + struct ib_port_attr pattr; slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE); @@ -263,6 +269,13 @@ int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, } else return IB_MAD_RESULT_SUCCESS; + if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED || + in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) && + in_mad->mad_hdr.method == IB_MGMT_METHOD_SET && + in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO && + !ib_query_port(ibdev, port_num, &pattr)) + prev_lid = pattr.lid; + err = mlx4_MAD_IFC(to_mdev(ibdev), mad_flags & IB_MAD_IGNORE_MKEY, mad_flags & IB_MAD_IGNORE_BKEY, @@ -271,7 +284,7 @@ int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num, return IB_MAD_RESULT_FAILURE; if (!out_mad->mad_hdr.status) { - smp_snoop(ibdev, port_num, in_mad); + smp_snoop(ibdev, port_num, in_mad, prev_lid); node_desc_override(ibdev, out_mad); } |