diff options
author | Maciej Sosnowski <maciej.sosnowski@intel.com> | 2010-11-24 12:29:38 -0500 |
---|---|---|
committer | Roland Dreier <rolandd@cisco.com> | 2011-01-16 16:23:34 -0500 |
commit | ea623455b736d82f476460647e8b5fe5dc36f4f2 (patch) | |
tree | c1e2343adc9b2e8f7e11d58dc561370905d60bb8 /drivers/infiniband/hw/nes/nes_verbs.c | |
parent | 2a4c97ead4b375a64063523210939b87ad225b85 (diff) |
RDMA/nes: Generate IB_EVENT_PORT_ERR/PORT_ACTIVE events
Depending on link state change, IB_EVENT_PORT_ERR or
IB_EVENT_PORT_ACTIVE should be generated when handling MAC interrupts.
Plugging in a cable happens to result in series of interrupts changing
driver's link state a number of times before finally staying at link
up (e.g. link up, link down, link up, link down, ..., link up). To
prevent sending series of redundant IB_EVENT_PORT_ACTIVE and
IB_EVENT_PORT_ERR events, we use a timer to debounce them in
nes_port_ibevent().
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/nes/nes_verbs.c')
-rw-r--r-- | drivers/infiniband/hw/nes/nes_verbs.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c index 99933e4e48f..26d8018c0a7 100644 --- a/drivers/infiniband/hw/nes/nes_verbs.c +++ b/drivers/infiniband/hw/nes/nes_verbs.c | |||
@@ -3936,6 +3936,30 @@ struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev) | |||
3936 | return nesibdev; | 3936 | return nesibdev; |
3937 | } | 3937 | } |
3938 | 3938 | ||
3939 | |||
3940 | /** | ||
3941 | * nes_handle_delayed_event | ||
3942 | */ | ||
3943 | static void nes_handle_delayed_event(unsigned long data) | ||
3944 | { | ||
3945 | struct nes_vnic *nesvnic = (void *) data; | ||
3946 | |||
3947 | if (nesvnic->delayed_event != nesvnic->last_dispatched_event) { | ||
3948 | struct ib_event event; | ||
3949 | |||
3950 | event.device = &nesvnic->nesibdev->ibdev; | ||
3951 | if (!event.device) | ||
3952 | goto stop_timer; | ||
3953 | event.event = nesvnic->delayed_event; | ||
3954 | event.element.port_num = nesvnic->logical_port + 1; | ||
3955 | ib_dispatch_event(&event); | ||
3956 | } | ||
3957 | |||
3958 | stop_timer: | ||
3959 | nesvnic->event_timer.function = NULL; | ||
3960 | } | ||
3961 | |||
3962 | |||
3939 | void nes_port_ibevent(struct nes_vnic *nesvnic) | 3963 | void nes_port_ibevent(struct nes_vnic *nesvnic) |
3940 | { | 3964 | { |
3941 | struct nes_ib_device *nesibdev = nesvnic->nesibdev; | 3965 | struct nes_ib_device *nesibdev = nesvnic->nesibdev; |
@@ -3944,7 +3968,18 @@ void nes_port_ibevent(struct nes_vnic *nesvnic) | |||
3944 | event.device = &nesibdev->ibdev; | 3968 | event.device = &nesibdev->ibdev; |
3945 | event.element.port_num = nesvnic->logical_port + 1; | 3969 | event.element.port_num = nesvnic->logical_port + 1; |
3946 | event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR; | 3970 | event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR; |
3947 | ib_dispatch_event(&event); | 3971 | |
3972 | if (!nesvnic->event_timer.function) { | ||
3973 | ib_dispatch_event(&event); | ||
3974 | nesvnic->last_dispatched_event = event.event; | ||
3975 | nesvnic->event_timer.function = nes_handle_delayed_event; | ||
3976 | nesvnic->event_timer.data = (unsigned long) nesvnic; | ||
3977 | nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY; | ||
3978 | add_timer(&nesvnic->event_timer); | ||
3979 | } else { | ||
3980 | mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY); | ||
3981 | } | ||
3982 | nesvnic->delayed_event = event.event; | ||
3948 | } | 3983 | } |
3949 | 3984 | ||
3950 | 3985 | ||