diff options
Diffstat (limited to 'drivers/net/iseries_veth.c')
| -rw-r--r-- | drivers/net/iseries_veth.c | 75 |
1 files changed, 69 insertions, 6 deletions
diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c index 7d6ba5114a1e..122d60db4ff7 100644 --- a/drivers/net/iseries_veth.c +++ b/drivers/net/iseries_veth.c @@ -132,6 +132,11 @@ struct veth_lpar_connection { struct kobject kobject; struct timer_list ack_timer; + struct timer_list reset_timer; + unsigned int reset_timeout; + unsigned long last_contact; + int outstanding_tx; + spinlock_t lock; unsigned long state; HvLpInstanceId src_inst; @@ -171,8 +176,9 @@ static int veth_start_xmit(struct sk_buff *skb, struct net_device *dev); static void veth_recycle_msg(struct veth_lpar_connection *, struct veth_msg *); static void veth_flush_pending(struct veth_lpar_connection *cnx); static void veth_receive(struct veth_lpar_connection *, struct VethLpEvent *); -static void veth_timed_ack(unsigned long connectionPtr); static void veth_release_connection(struct kobject *kobject); +static void veth_timed_ack(unsigned long ptr); +static void veth_timed_reset(unsigned long ptr); static struct kobj_type veth_lpar_connection_ktype = { .release = veth_release_connection @@ -360,7 +366,7 @@ static void veth_handle_int(struct VethLpEvent *event) HvLpIndex rlp = event->base_event.xSourceLp; struct veth_lpar_connection *cnx = veth_cnx[rlp]; unsigned long flags; - int i; + int i, acked = 0; BUG_ON(! cnx); @@ -374,13 +380,22 @@ static void veth_handle_int(struct VethLpEvent *event) break; case VethEventTypeFramesAck: spin_lock_irqsave(&cnx->lock, flags); + for (i = 0; i < VETH_MAX_ACKS_PER_MSG; ++i) { u16 msgnum = event->u.frames_ack_data.token[i]; - if (msgnum < VETH_NUMBUFFERS) + if (msgnum < VETH_NUMBUFFERS) { veth_recycle_msg(cnx, cnx->msgs + msgnum); + cnx->outstanding_tx--; + acked++; + } } + + if (acked > 0) + cnx->last_contact = jiffies; + spin_unlock_irqrestore(&cnx->lock, flags); + veth_flush_pending(cnx); break; case VethEventTypeFrames: @@ -454,8 +469,6 @@ static void veth_statemachine(void *p) restart: if (cnx->state & VETH_STATE_RESET) { - int i; - if (cnx->state & VETH_STATE_OPEN) HvCallEvent_closeLpEventPath(cnx->remote_lp, HvLpEvent_Type_VirtualLan); @@ -474,15 +487,20 @@ static void veth_statemachine(void *p) | VETH_STATE_SENTCAPACK | VETH_STATE_READY); /* Clean up any leftover messages */ - if (cnx->msgs) + if (cnx->msgs) { + int i; for (i = 0; i < VETH_NUMBUFFERS; ++i) veth_recycle_msg(cnx, cnx->msgs + i); + } + cnx->outstanding_tx = 0; /* Drop the lock so we can do stuff that might sleep or * take other locks. */ spin_unlock_irq(&cnx->lock); del_timer_sync(&cnx->ack_timer); + del_timer_sync(&cnx->reset_timer); + veth_flush_pending(cnx); spin_lock_irq(&cnx->lock); @@ -631,9 +649,16 @@ static int veth_init_connection(u8 rlp) cnx->remote_lp = rlp; spin_lock_init(&cnx->lock); INIT_WORK(&cnx->statemachine_wq, veth_statemachine, cnx); + init_timer(&cnx->ack_timer); cnx->ack_timer.function = veth_timed_ack; cnx->ack_timer.data = (unsigned long) cnx; + + init_timer(&cnx->reset_timer); + cnx->reset_timer.function = veth_timed_reset; + cnx->reset_timer.data = (unsigned long) cnx; + cnx->reset_timeout = 5 * HZ * (VETH_ACKTIMEOUT / 1000000); + memset(&cnx->pending_acks, 0xff, sizeof (cnx->pending_acks)); veth_cnx[rlp] = cnx; @@ -948,6 +973,13 @@ static int veth_transmit_to_one(struct sk_buff *skb, HvLpIndex rlp, if (rc != HvLpEvent_Rc_Good) goto recycle_and_drop; + /* If the timer's not already running, start it now. */ + if (0 == cnx->outstanding_tx) + mod_timer(&cnx->reset_timer, jiffies + cnx->reset_timeout); + + cnx->last_contact = jiffies; + cnx->outstanding_tx++; + spin_unlock_irqrestore(&cnx->lock, flags); return 0; @@ -1093,6 +1125,37 @@ static void veth_flush_pending(struct veth_lpar_connection *cnx) } } +static void veth_timed_reset(unsigned long ptr) +{ + struct veth_lpar_connection *cnx = (struct veth_lpar_connection *)ptr; + unsigned long trigger_time, flags; + + /* FIXME is it possible this fires after veth_stop_connection()? + * That would reschedule the statemachine for 5 seconds and probably + * execute it after the module's been unloaded. Hmm. */ + + spin_lock_irqsave(&cnx->lock, flags); + + if (cnx->outstanding_tx > 0) { + trigger_time = cnx->last_contact + cnx->reset_timeout; + + if (trigger_time < jiffies) { + cnx->state |= VETH_STATE_RESET; + veth_kick_statemachine(cnx); + veth_error("%d packets not acked by LPAR %d within %d " + "seconds, resetting.\n", + cnx->outstanding_tx, cnx->remote_lp, + cnx->reset_timeout / HZ); + } else { + /* Reschedule the timer */ + trigger_time = jiffies + cnx->reset_timeout; + mod_timer(&cnx->reset_timer, trigger_time); + } + } + + spin_unlock_irqrestore(&cnx->lock, flags); +} + /* * Rx path */ |