Commit d20046e6 authored by Tyrel Datwyler's avatar Tyrel Datwyler Committed by Martin K. Petersen
Browse files

scsi: ibmvfc: Add Sub-CRQ IRQ enable/disable routine 

Each Sub-CRQ has its own interrupt. A hypercall is required to toggle the
IRQ state. Provide the necessary mechanism via a helper function.

Link: https://lore.kernel.org/r/20210114203148.246656-9-tyreld@linux.ibm.com


Reviewed-by: default avatarBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: default avatarTyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 3034ebe2

drivers/scsi/ibmvscsi/ibmvfc.c

+20 −0
Original line number Diff line number Diff line
@@ -3465,6 +3465,26 @@ static void ibmvfc_tasklet(void *data) 
	}

}



static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable)

{

	struct device *dev = scrq->vhost->dev;

	struct vio_dev *vdev = to_vio_dev(dev);

	unsigned long rc;

	int irq_action = H_ENABLE_VIO_INTERRUPT;



	if (!enable)

		irq_action = H_DISABLE_VIO_INTERRUPT;



	rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action,

				scrq->hw_irq, 0, 0);



	if (rc)

		dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n",

			enable ? "enable" : "disable", scrq->hwq_id, rc);



	return rc;

}



/**

 * ibmvfc_init_tgt - Set the next init job step for the target

 * @tgt:		ibmvfc target struct