Commit 39e461fd authored by Tyrel Datwyler's avatar Tyrel Datwyler Committed by Martin K. Petersen
Browse files

scsi: ibmvfc: Map/request irq and register Sub-CRQ interrupt handler 

Create an irq mapping for the hw_irq number provided from phyp firmware.
Request an irq assigned our Sub-CRQ interrupt handler. Unmap these irqs at
Sub-CRQ teardown.

Link: https://lore.kernel.org/r/20210114203148.246656-12-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 80a9e8ea

drivers/scsi/ibmvscsi/ibmvfc.c

+25 −0
Original line number Diff line number Diff line
@@ -5292,12 +5292,34 @@ static int ibmvfc_register_scsi_channel(struct ibmvfc_host *vhost, 
		goto reg_failed;

	}



	scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);



	if (!scrq->irq) {

		rc = -EINVAL;

		dev_err(dev, "Error mapping sub-crq[%d] irq\n", index);

		goto irq_failed;

	}



	snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d",

		 vdev->unit_address, index);

	rc = request_irq(scrq->irq, ibmvfc_interrupt_scsi, 0, scrq->name, scrq);



	if (rc) {

		dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index);

		irq_dispose_mapping(scrq->irq);

		goto irq_failed;

	}



	scrq->hwq_id = index;

	scrq->vhost = vhost;



	LEAVE;

	return 0;



irq_failed:

	do {

		plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie);

	} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));

reg_failed:

	ibmvfc_free_queue(vhost, scrq);

	LEAVE;
@@ -5313,6 +5335,9 @@ static void ibmvfc_deregister_scsi_channel(struct ibmvfc_host *vhost, int index) 


	ENTER;



	free_irq(scrq->irq, scrq);

	irq_dispose_mapping(scrq->irq);



	do {

		rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address,

					scrq->cookie);