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vfio/pci: Expose vfio_pci_core_setup_barmap()

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Expose vfio_pci_core_setup_barmap() to be used by drivers.

This will let drivers to mmap a BAR and re-use it from both vfio and the
driver when it's applicable.

This API will be used in the next patches by the vfio/virtio coming
driver.

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/20231219093247.170936-8-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Yishai Hadas 2023-12-19 11:32:45 +02:00 committed by Alex Williamson
parent c3fc3e098b
commit 8bccc5b806
2 changed files with 5 additions and 3 deletions
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7
drivers/vfio/pci/vfio_pci_rdwr.c
View File

@ -200,7 +200,7 @@ static ssize_t do_io_rw(struct vfio_pci_core_device *vdev, bool test_mem,
return done;
}
static int vfio_pci_setup_barmap(struct vfio_pci_core_device *vdev, int bar)
int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar)
{
struct pci_dev *pdev = vdev->pdev;
int ret;
@ -223,6 +223,7 @@ static int vfio_pci_setup_barmap(struct vfio_pci_core_device *vdev, int bar)
return 0;
}
EXPORT_SYMBOL_GPL(vfio_pci_core_setup_barmap);
ssize_t vfio_pci_bar_rw(struct vfio_pci_core_device *vdev, char __user *buf,
size_t count, loff_t *ppos, bool iswrite)
@ -262,7 +263,7 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_core_device *vdev, char __user *buf,
}
x_end = end;
} else {
int ret = vfio_pci_setup_barmap(vdev, bar);
int ret = vfio_pci_core_setup_barmap(vdev, bar);
if (ret) {
done = ret;
goto out;
@ -438,7 +439,7 @@ int vfio_pci_ioeventfd(struct vfio_pci_core_device *vdev, loff_t offset,
return -EINVAL;
#endif
ret = vfio_pci_setup_barmap(vdev, bar);
ret = vfio_pci_core_setup_barmap(vdev, bar);
if (ret)
return ret;

1
include/linux/vfio_pci_core.h
View File

@ -127,6 +127,7 @@ int vfio_pci_core_match(struct vfio_device *core_vdev, char *buf);
int vfio_pci_core_enable(struct vfio_pci_core_device *vdev);
void vfio_pci_core_disable(struct vfio_pci_core_device *vdev);
void vfio_pci_core_finish_enable(struct vfio_pci_core_device *vdev);
int vfio_pci_core_setup_barmap(struct vfio_pci_core_device *vdev, int bar);
pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev,
pci_channel_state_t state);