[PATCH v5 11/21] ibmvfc: map/request irq and register Sub-CRQ interrupt handler
From: Tyrel Datwyler <tyreld@linux.ibm.com>
Date: 2021-01-14 20:34:14
Also in:
linux-scsi, lkml
Subsystem:
ibm power virtual fc device drivers, linux for powerpc (32-bit and 64-bit), scsi subsystem, the rest · Maintainers:
Tyrel Datwyler, Madhavan Srinivasan, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
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. Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> Reviewed-by: Brian King <redacted> --- drivers/scsi/ibmvscsi/ibmvfc.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 51bcafad9490..d3d7c6b53d4f 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c@@ -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);
--
2.27.0