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vDPA/ifcvf: introduce get_dev_type() which returns virtio dev id

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This commit introduces a new function get_dev_type() which returns
the virtio device id of a device, to avoid duplicated code.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210812032454.24486-2-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan 2021-08-12 11:24:53 +08:00 committed by Michael S. Tsirkin
parent 7d2a07b769
commit 30326f9577
1 changed files with 21 additions and 13 deletions
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34
drivers/vdpa/ifcvf/ifcvf_main.c
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@ -458,6 +458,26 @@ static const struct vdpa_config_ops ifc_vdpa_ops = {
.get_vq_notification = ifcvf_get_vq_notification,
};
static u32 get_dev_type(struct pci_dev *pdev)
{
u32 dev_type;
/* This drirver drives both modern virtio devices and transitional
* devices in modern mode.
* vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
* so legacy devices and transitional devices in legacy
* mode will not work for vDPA, this driver will not
* drive devices with legacy interface.
*/
if (pdev->device < 0x1040)
dev_type = pdev->subsystem_device;
else
dev_type = pdev->device - 0x1040;
return dev_type;
}
static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct device *dev = &pdev->dev;
@ -502,19 +522,7 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
pci_set_drvdata(pdev, adapter);
vf = &adapter->vf;
/* This drirver drives both modern virtio devices and transitional
* devices in modern mode.
* vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
* so legacy devices and transitional devices in legacy
* mode will not work for vDPA, this driver will not
* drive devices with legacy interface.
*/
if (pdev->device < 0x1040)
vf->dev_type = pdev->subsystem_device;
else
vf->dev_type = pdev->device - 0x1040;
vf->dev_type = get_dev_type(pdev);
vf->base = pcim_iomap_table(pdev);
adapter->pdev = pdev;