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

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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: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Tyrel Datwyler 2021-01-14 14:31:38 -06:00 committed by Martin K. Petersen
parent 80a9e8eaed
commit 39e461fddf
1 changed files with 25 additions and 0 deletions
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25
drivers/scsi/ibmvscsi/ibmvfc.c
View file

@ -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);