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| author |   Xie Yongji <xieyongji@bytedance.com> | 2021-08-31 18:36:26 +0800 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2021-09-06 07:20:57 -0400 |
| commit | 0686082dbf7a204ca0fab326a820779e31666639 (patch) | |
| tree | 889a7e8628defb413e7863264a62781869e1332c /drivers/vdpa/virtio_pci | |
| parent | vdpa: Fix some coding style issues (diff) | |
| download | wireguard-linux-0686082dbf7a204ca0fab326a820779e31666639.tar.xz wireguard-linux-0686082dbf7a204ca0fab326a820779e31666639.zip | |
vdpa: Add reset callback in vdpa_config_ops
This adds a new callback to support device specific reset
behavior. The vdpa bus driver will call the reset function
instead of setting status to zero during resetting.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20210831103634.33-6-xieyongji@bytedance.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa/virtio_pci')
| -rw-r--r-- | drivers/vdpa/virtio_pci/vp_vdpa.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c index fe0527329857..cd7718b43a6e 100644 --- a/drivers/vdpa/virtio_pci/vp_vdpa.c +++ b/drivers/vdpa/virtio_pci/vp_vdpa.c @@ -189,10 +189,20 @@ static void vp_vdpa_set_status(struct vdpa_device *vdpa, u8 status) } vp_modern_set_status(mdev, status); +} - if (!(status & VIRTIO_CONFIG_S_DRIVER_OK) && - (s & VIRTIO_CONFIG_S_DRIVER_OK)) +static int vp_vdpa_reset(struct vdpa_device *vdpa) +{ + struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa); + struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev; + u8 s = vp_vdpa_get_status(vdpa); + + vp_modern_set_status(mdev, 0); + + if (s & VIRTIO_CONFIG_S_DRIVER_OK) vp_vdpa_free_irq(vp_vdpa); + + return 0; } static u16 vp_vdpa_get_vq_num_max(struct vdpa_device *vdpa) @@ -398,6 +408,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = { .set_features = vp_vdpa_set_features, .get_status = vp_vdpa_get_status, .set_status = vp_vdpa_set_status, + .reset = vp_vdpa_reset, .get_vq_num_max = vp_vdpa_get_vq_num_max, .get_vq_state = vp_vdpa_get_vq_state, .get_vq_notification = vp_vdpa_get_vq_notification, |