diff options
| author | Maciej Sosnowski <maciej.sosnowski@intel.com> | 2010-11-24 20:29:38 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2011-01-17 00:23:34 +0300 |
| commit | ea623455b736d82f476460647e8b5fe5dc36f4f2 (patch) | |
| tree | c1e2343adc9b2e8f7e11d58dc561370905d60bb8 /drivers/infiniband/hw/nes/nes_verbs.c | |
| parent | 2a4c97ead4b375a64063523210939b87ad225b85 (diff) | |
| download | linux-ea623455b736d82f476460647e8b5fe5dc36f4f2.tar.xz | |
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 99933e4e48ff..26d8018c0a7c 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) return nesibdev; } + +/** + * nes_handle_delayed_event + */ +static void nes_handle_delayed_event(unsigned long data) +{ + struct nes_vnic *nesvnic = (void *) data; + + if (nesvnic->delayed_event != nesvnic->last_dispatched_event) { + struct ib_event event; + + event.device = &nesvnic->nesibdev->ibdev; + if (!event.device) + goto stop_timer; + event.event = nesvnic->delayed_event; + event.element.port_num = nesvnic->logical_port + 1; + ib_dispatch_event(&event); + } + +stop_timer: + nesvnic->event_timer.function = NULL; +} + + void nes_port_ibevent(struct nes_vnic *nesvnic) { struct nes_ib_device *nesibdev = nesvnic->nesibdev; @@ -3944,7 +3968,18 @@ void nes_port_ibevent(struct nes_vnic *nesvnic) event.device = &nesibdev->ibdev; event.element.port_num = nesvnic->logical_port + 1; event.event = nesdev->iw_status ? IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR; - ib_dispatch_event(&event); + + if (!nesvnic->event_timer.function) { + ib_dispatch_event(&event); + nesvnic->last_dispatched_event = event.event; + nesvnic->event_timer.function = nes_handle_delayed_event; + nesvnic->event_timer.data = (unsigned long) nesvnic; + nesvnic->event_timer.expires = jiffies + NES_EVENT_DELAY; + add_timer(&nesvnic->event_timer); + } else { + mod_timer(&nesvnic->event_timer, jiffies + NES_EVENT_DELAY); + } + nesvnic->delayed_event = event.event; } |