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Date: Mon, 11 Jan 2021 17:12:12 -0600 From: Tyrel Datwyler <tyreld@...ux.ibm.com> To: james.bottomley@...senpartnership.com Cc: martin.petersen@...cle.com, linux-scsi@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org, brking@...ux.ibm.com, Tyrel Datwyler <tyreld@...ux.ibm.com> Subject: [PATCH v4 08/21] ibmvfc: add Sub-CRQ IRQ enable/disable routine 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@...ux.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 -- 2.27.0
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