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virtio-pci: split out modern device

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This patch splits out the virtio-pci modern device only attributes
into another structure. While at it, a dedicated probe method for
modern only attributes is introduced. This may help for split the
logic into a dedicated module.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210104065503.199631-3-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang
2021-01-04 14:54:46 +08:00
committed by Michael S. Tsirkin
parent 64f2087aaa
commit b5d5809450
2 changed files with 104 additions and 78 deletions
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25
drivers/virtio/virtio_pci_common.h
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@@ -39,22 +39,16 @@ struct virtio_pci_vq_info {
unsigned msix_vector;
};
/* Our device structure */
struct virtio_pci_device {
struct virtio_device vdev;
struct virtio_pci_modern_device {
struct pci_dev *pci_dev;
/* In legacy mode, these two point to within ->legacy. */
/* Where to read and clear interrupt */
u8 __iomem *isr;
/* Modern only fields */
/* The IO mapping for the PCI config space (non-legacy mode) */
struct virtio_pci_common_cfg __iomem *common;
/* Device-specific data (non-legacy mode) */
void __iomem *device;
/* Base of vq notifications (non-legacy mode). */
void __iomem *notify_base;
/* Where to read and clear interrupt */
u8 __iomem *isr;
/* So we can sanity-check accesses. */
size_t notify_len;
@@ -68,6 +62,19 @@ struct virtio_pci_device {
int modern_bars;
struct virtio_device_id id;
};
/* Our device structure */
struct virtio_pci_device {
struct virtio_device vdev;
struct pci_dev *pci_dev;
struct virtio_pci_modern_device mdev;
/* In legacy mode, these two point to within ->legacy. */
/* Where to read and clear interrupt */
u8 __iomem *isr;
/* Legacy only field */
/* the IO mapping for the PCI config space */
void __iomem *ioaddr;