[PATCH v3 08/18] ibmvfc: map/request irq and register Sub-CRQ interrupt handler

Tyrel Datwyler
2020-12-03T02:09:43Z

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

Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
---
drivers/scsi/ibmvscsi/ibmvfc.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 649268996a5c..6b299df786fc 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -5134,12 +5134,34 @@ 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:
dma_unmap_single(dev, scrq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
dma_map_failed:
--
2.27.0