diff options
| author | Israel Rukshin <israelr@nvidia.com> | 2024-11-27 08:57:31 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2025-01-27 09:39:26 -0500 |
| commit | a0ec4fb63f5ce15732f8dadc63c931bdf9ff98b5 (patch) | |
| tree | abbb9b9f82df4529095f108a9b786652c275043a /include | |
| parent | a3b9c053d82a9e524746f5473ad1bd18e9894bfa (diff) | |
virtio_pci: Add support for PCIe Function Level Reset
Implement support for Function Level Reset (FLR) in virtio_pci devices.
This change adds reset_prepare and reset_done callbacks, allowing
drivers to properly handle FLR operations.
Without this patch, performing and recovering from an FLR is not possible
for virtio_pci devices. This implementation ensures proper FLR handling
and recovery for both physical and virtual functions.
The device reset can be triggered in case of error or manually via
sysfs:
echo 1 > /sys/bus/pci/devices/$PCI_ADDR/reset
Signed-off-by: Israel Rukshin <israelr@nvidia.com>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Message-Id: <1732690652-3065-2-git-send-email-israelr@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/virtio.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index dd88682e27e3..4d16c13d0df5 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -190,6 +190,8 @@ int virtio_device_freeze(struct virtio_device *dev); int virtio_device_restore(struct virtio_device *dev); #endif void virtio_reset_device(struct virtio_device *dev); +int virtio_device_reset_prepare(struct virtio_device *dev); +int virtio_device_reset_done(struct virtio_device *dev); size_t virtio_max_dma_size(const struct virtio_device *vdev); @@ -214,6 +216,10 @@ size_t virtio_max_dma_size(const struct virtio_device *vdev); * changes; may be called in interrupt context. * @freeze: optional function to call during suspend/hibernation. * @restore: optional function to call on resume. + * @reset_prepare: optional function to call when a transport specific reset + * occurs. + * @reset_done: optional function to call after transport specific reset + * operation has finished. */ struct virtio_driver { struct device_driver driver; @@ -229,6 +235,8 @@ struct virtio_driver { void (*config_changed)(struct virtio_device *dev); int (*freeze)(struct virtio_device *dev); int (*restore)(struct virtio_device *dev); + int (*reset_prepare)(struct virtio_device *dev); + int (*reset_done)(struct virtio_device *dev); }; #define drv_to_virtio(__drv) container_of_const(__drv, struct virtio_driver, driver) |