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From: Tyrel Datwyler <tyreld@linux.ibm.com>
To: james.bottomley@hansenpartnership.com
Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
	brking@linux.ibm.com, Tyrel Datwyler <tyreld@linux.ibm.com>,
	Brian King <brking@linux.vnet.ibm.com>
Subject: [PATCH v2 05/17] ibmvfc: add Sub-CRQ IRQ enable/disable routine
Date: Tue,  1 Dec 2020 18:53:17 -0600	[thread overview]
Message-ID: <20201202005329.4538-6-tyreld@linux.ibm.com> (raw)
In-Reply-To: <20201202005329.4538-1-tyreld@linux.ibm.com>

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>
Reviewed-by: Brian King <brking@linux.vnet.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 4860487c6779..97f00fefa809 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -3361,6 +3361,26 @@ static void ibmvfc_tasklet(void *data)
 	spin_unlock_irqrestore(vhost->host->host_lock, flags);
 }
 
+static int ibmvfc_toggle_scrq_irq(struct ibmvfc_sub_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


  parent reply	other threads:[~2020-12-02  0:57 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-02  0:53 [PATCH v2 00/17] ibmvfc: initial MQ development Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 01/17] ibmvfc: add vhost fields and defaults for MQ enablement Tyrel Datwyler
2020-12-02 15:14   ` Brian King
2020-12-02 17:27     ` Tyrel Datwyler
2020-12-04 14:26       ` Brian King
2020-12-07 11:56         ` Hannes Reinecke
2020-12-08 22:37           ` Tyrel Datwyler
2020-12-17 11:49             ` John Garry
2020-12-02  0:53 ` [PATCH v2 02/17] ibmvfc: define hcall wrapper for registering a Sub-CRQ Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 03/17] ibmvfc: add Subordinate CRQ definitions Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 04/17] ibmvfc: add alloc/dealloc routines for SCSI Sub-CRQ Channels Tyrel Datwyler
2020-12-02 15:25   ` Brian King
2020-12-02 22:23     ` Tyrel Datwyler
2020-12-02  0:53 ` Tyrel Datwyler [this message]
2020-12-02  0:53 ` [PATCH v2 06/17] ibmvfc: add handlers to drain and complete Sub-CRQ responses Tyrel Datwyler
2020-12-02 15:46   ` Brian King
2020-12-02 22:28     ` Tyrel Datwyler
2020-12-02 15:56   ` Brian King
2020-12-02  0:53 ` [PATCH v2 07/17] ibmvfc: define Sub-CRQ interrupt handler routine Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 08/17] ibmvfc: map/request irq and register Sub-CRQ interrupt handler Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 09/17] ibmvfc: implement channel enquiry and setup commands Tyrel Datwyler
2020-12-02 15:51   ` Brian King
2020-12-02  0:53 ` [PATCH v2 10/17] ibmvfc: advertise client support for using hardware channels Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 11/17] ibmvfc: set and track hw queue in ibmvfc_event struct Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 12/17] ibmvfc: send commands down HW Sub-CRQ when channelized Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 13/17] ibmvfc: register Sub-CRQ handles with VIOS during channel setup Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 14/17] ibmvfc: add cancel mad initialization helper Tyrel Datwyler
2020-12-02 16:00   ` Brian King
2020-12-02  0:53 ` [PATCH v2 15/17] ibmvfc: send Cancel MAD down each hw scsi channel Tyrel Datwyler
2020-12-02 18:27   ` Brian King
2020-12-02 22:09     ` Tyrel Datwyler
2020-12-02  0:53 ` [PATCH v2 16/17] ibmvfc: enable MQ and set reasonable defaults Tyrel Datwyler
2020-12-02 18:31   ` Brian King
2020-12-02  0:53 ` [PATCH v2 17/17] ibmvfc: provide modules parameters for MQ settings Tyrel Datwyler
2020-12-02 18:40   ` Brian King
2020-12-02 22:17     ` Tyrel Datwyler

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