linux-kernel - [PATCH 3/6] vp_vdpa: add vq irq offloading support

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Message-Id: <88701e88ab061f5d1b94bd046afcb9d3588414c3.1631101392.git.wuzongyong@linux.alibaba.com>
Date:   Wed,  8 Sep 2021 20:20:34 +0800
From:   Wu Zongyong <wuzongyong@...ux.alibaba.com>
To:     wuzongyong@...ux.alibaba.com, jasowang@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, mst@...hat.com
Cc:     wei.yang1@...ux.alibaba.com
Subject: [PATCH 3/6] vp_vdpa: add vq irq offloading support

This patch implements the get_vq_irq() callback for virtio pci devices
to allow irq offloading.

Signed-off-by: Wu Zongyong <wuzongyong@...ux.alibaba.com>
---
 drivers/vdpa/virtio_pci/vp_vdpa.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index fe0527329857..4c512ae1fe01 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -76,6 +76,13 @@ static u8 vp_vdpa_get_status(struct vdpa_device *vdpa)
 	return vp_modern_get_status(mdev);
 }
 
+static int vp_vdpa_get_vq_irq(struct vdpa_device *vdev, u16 idx)
+{
+	struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdev);
+
+	return vp_vdpa->vring[idx].irq;
+}
+
 static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa)
 {
 	struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
@@ -416,6 +423,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = {
 	.get_config	= vp_vdpa_get_config,
 	.set_config	= vp_vdpa_set_config,
 	.set_config_cb  = vp_vdpa_set_config_cb,
+	.get_vq_irq	= vp_vdpa_get_vq_irq,
 };
 
 static void vp_vdpa_free_irq_vectors(void *data)
-- 
2.31.1