linux-kernel - [PATCH V2 3/3] vDPA/ifcvf: get_config_size should return dev specific config size

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Message-Id: <20210415095336.4792-4-lingshan.zhu@intel.com>
Date:   Thu, 15 Apr 2021 17:53:36 +0800
From:   Zhu Lingshan <lingshan.zhu@...el.com>
To:     jasowang@...hat.com, mst@...hat.com, lulu@...hat.com,
        sgarzare@...hat.com
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH V2 3/3] vDPA/ifcvf: get_config_size should return dev specific config size

get_config_size() should return the size based on the decected
device type.

Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index cea1313b1a3f..6844c49fe1de 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -347,7 +347,23 @@ static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
 
 static size_t ifcvf_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
 {
-	return sizeof(struct virtio_net_config);
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	struct pci_dev *pdev = adapter->pdev;
+	size_t size;
+
+	if (vf->dev_type == VIRTIO_ID_NET)
+		size = sizeof(struct virtio_net_config);
+
+	else if (vf->dev_type == VIRTIO_ID_BLOCK)
+		size = sizeof(struct virtio_blk_config);
+
+	else {
+		size = 0;
+		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
+	}
+
+	return size;
 }
 
 static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
-- 
2.27.0