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ibmvnic: Handle processing of CRQ messages in a tasklet

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Create a tasklet to process queued commands or messages received from
firmware instead of processing them in the interrupt handler. Note that
this handler does not process network traffic, but communications related
to resource allocation and device settings.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Falcon 2017-02-15 12:17:58 -06:00 committed by David S. Miller
parent 1e128c8129
commit 6c267b3dea
2 changed files with 18 additions and 1 deletions
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18
drivers/net/ethernet/ibm/ibmvnic.c
View file

@ -3420,6 +3420,18 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
{
struct ibmvnic_adapter *adapter = instance;
unsigned long flags;
spin_lock_irqsave(&adapter->crq.lock, flags);
vio_disable_interrupts(adapter->vdev);
tasklet_schedule(&adapter->tasklet);
spin_unlock_irqrestore(&adapter->crq.lock, flags);
return IRQ_HANDLED;
}
static void ibmvnic_tasklet(void *data)
{
struct ibmvnic_adapter *adapter = data;
struct ibmvnic_crq_queue *queue = &adapter->crq;
struct vio_dev *vdev = adapter->vdev;
union ibmvnic_crq *crq;
@ -3445,7 +3457,6 @@ static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
}
}
spin_unlock_irqrestore(&queue->lock, flags);
return IRQ_HANDLED;
}
static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
@ -3500,6 +3511,7 @@ static void ibmvnic_release_crq_queue(struct ibmvnic_adapter *adapter)
netdev_dbg(adapter->netdev, "Releasing CRQ\n");
free_irq(vdev->irq, adapter);
tasklet_kill(&adapter->tasklet);
do {
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
@ -3545,6 +3557,9 @@ static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
retrc = 0;
tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
(unsigned long)adapter);
netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
adapter);
@ -3566,6 +3581,7 @@ static int ibmvnic_init_crq_queue(struct ibmvnic_adapter *adapter)
return retrc;
req_irq_failed:
tasklet_kill(&adapter->tasklet);
do {
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));

1
drivers/net/ethernet/ibm/ibmvnic.h
View file

@ -1049,5 +1049,6 @@ struct ibmvnic_adapter {
struct work_struct vnic_crq_init;
struct work_struct ibmvnic_xport;
struct tasklet_struct tasklet;
bool failover;
};