netdev - [PATCH V2 5/6] ifcvf: replace irq_request/free with vDPA helpers

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Message-Id: <1594898629-18790-6-git-send-email-lingshan.zhu@intel.com>
Date:   Thu, 16 Jul 2020 19:23:48 +0800
From:   Zhu Lingshan <lingshan.zhu@...el.com>
To:     mst@...hat.com, alex.williamson@...hat.com, pbonzini@...hat.com,
        sean.j.christopherson@...el.com, wanpengli@...cent.com,
        jasowang@...hat.com
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH V2 5/6] ifcvf: replace irq_request/free with vDPA helpers

This commit replaced irq_request/free() with helpers in vDPA
core, so that it can request/free irq and setup irq offloading
on order.

Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>
Suggested-by: Jason Wang <jasowang@...hat.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index f5a60c1..bd2a317 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -47,11 +47,12 @@ static void ifcvf_free_irq(struct ifcvf_adapter *adapter, int queues)
 {
 	struct pci_dev *pdev = adapter->pdev;
 	struct ifcvf_hw *vf = &adapter->vf;
+	struct vdpa_device *vdpa = &adapter->vdpa;
 	int i;
 
 
 	for (i = 0; i < queues; i++)
-		devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]);
+		vdpa_free_vq_irq(&pdev->dev, vdpa, vf->vring[i].irq, i, &vf->vring[i]);
 
 	ifcvf_free_irq_vectors(pdev);
 }
@@ -60,6 +61,7 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
 {
 	struct pci_dev *pdev = adapter->pdev;
 	struct ifcvf_hw *vf = &adapter->vf;
+	struct vdpa_device *vdpa = &adapter->vdpa;
 	int vector, i, ret, irq;
 
 	ret = pci_alloc_irq_vectors(pdev, IFCVF_MAX_INTR,
@@ -73,6 +75,10 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
 		 pci_name(pdev));
 	vector = 0;
 	irq = pci_irq_vector(pdev, vector);
+	/* This isconfig interrupt, config accesses all go
+	 * through userspace, so no need to setup
+	 * config interrupt offloading.
+	 */
 	ret = devm_request_irq(&pdev->dev, irq,
 			       ifcvf_config_changed, 0,
 			       vf->config_msix_name, vf);
@@ -82,13 +88,11 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
 			 pci_name(pdev), i);
 		vector = i + IFCVF_MSI_QUEUE_OFF;
 		irq = pci_irq_vector(pdev, vector);
-		ret = devm_request_irq(&pdev->dev, irq,
+		ret = vdpa_alloc_vq_irq(&pdev->dev, vdpa, irq,
 				       ifcvf_intr_handler, 0,
 				       vf->vring[i].msix_name,
-				       &vf->vring[i]);
+				       &vf->vring[i], i);
 		if (ret) {
-			IFCVF_ERR(pdev,
-				  "Failed to request irq for vq %d\n", i);
 			ifcvf_free_irq(adapter, i);
 
 			return ret;
-- 
1.8.3.1