[PATCH v4 08/21] ibmvfc: add Sub-CRQ IRQ enable/disable routine
flat view
STALE2090d
From: Tyrel Datwyler <tyreld@linux.ibm.com>
Date: 2021-01-12 00:50:06
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
Revision v4 of 4 in this series.
Revisions (4)
- v1 [diff vs current]
- v2 [diff vs current]
- v3 [diff vs current]
- v4 current
Each Sub-CRQ has its own interrupt. A hypercall is required to toggle the IRQ state. Provide the necessary mechanism via a helper function. Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> --- drivers/scsi/ibmvscsi/ibmvfc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index a198e118887d..5d7ada0ed0d6 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c@@ -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
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2.27.0