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virtio-pci library: report resource address

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Sometimes it might be useful to report the capability physical
address. One example is to report the physical address of the doorbell
in order to be mapped by userspace.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-7-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang
2021-04-15 03:31:46 -04:00
committed by Michael S. Tsirkin
parent fd466b3694
commit 9e311bcad7
4 changed files with 23 additions and 10 deletions
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4
include/linux/virtio_pci_modern.h
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@@ -13,6 +13,8 @@ struct virtio_pci_modern_device {
void __iomem *device;
/* Base of vq notifications (non-legacy mode). */
void __iomem *notify_base;
/* Physical base of vq notifications */
resource_size_t notify_pa;
/* Where to read and clear interrupt */
u8 __iomem *isr;
@@ -100,7 +102,7 @@ u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
u16 idx);
u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
void *vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
u16 index);
u16 index, resource_size_t *pa);
int vp_modern_probe(struct virtio_pci_modern_device *mdev);
void vp_modern_remove(struct virtio_pci_modern_device *mdev);
#endif