diff options
| author | Jason Wang <jasowang@redhat.com> | 2021-04-15 10:31:47 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-05-03 11:55:52 +0300 |
| commit | 526cb8580bc6b9e5bc14cc5d24ecf4633a84cfa1 (patch) | |
| tree | ff42d2efe41caf03d9accee35cdb630b4efc1995 /drivers | |
| parent | 9e311bcad73dc14bd0a736db6ad3d382227e11fe (diff) | |
| download | linux-526cb8580bc6b9e5bc14cc5d24ecf4633a84cfa1.tar.xz | |
vp_vdpa: report doorbell address
This patch reports the per vq doorbell location and size to vDPA
bus. Userspace can then map the doorbell via mmap() via vhost-vDPA bus
driver.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210415073147.19331-8-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vdpa/virtio_pci/vp_vdpa.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c index 98205e54d089..002b928d0ca1 100644 --- a/drivers/vdpa/virtio_pci/vp_vdpa.c +++ b/drivers/vdpa/virtio_pci/vp_vdpa.c @@ -26,6 +26,7 @@ struct vp_vring { void __iomem *notify; char msix_name[VP_VDPA_NAME_SIZE]; struct vdpa_callback cb; + resource_size_t notify_pa; int irq; }; @@ -336,6 +337,19 @@ static void vp_vdpa_set_config_cb(struct vdpa_device *vdpa, vp_vdpa->config_cb = *cb; } +static struct vdpa_notification_area +vp_vdpa_get_vq_notification(struct vdpa_device *vdpa, u16 qid) +{ + struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa); + struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev; + struct vdpa_notification_area notify; + + notify.addr = vp_vdpa->vring[qid].notify_pa; + notify.size = mdev->notify_offset_multiplier; + + return notify; +} + static const struct vdpa_config_ops vp_vdpa_ops = { .get_features = vp_vdpa_get_features, .set_features = vp_vdpa_set_features, @@ -343,6 +357,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = { .set_status = vp_vdpa_set_status, .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, .set_vq_state = vp_vdpa_set_vq_state, .set_vq_cb = vp_vdpa_set_vq_cb, .set_vq_ready = vp_vdpa_set_vq_ready, @@ -416,7 +431,8 @@ static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id) for (i = 0; i < vp_vdpa->queues; i++) { vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR; vp_vdpa->vring[i].notify = - vp_modern_map_vq_notify(mdev, i, NULL); + vp_modern_map_vq_notify(mdev, i, + &vp_vdpa->vring[i].notify_pa); if (!vp_vdpa->vring[i].notify) { dev_warn(&pdev->dev, "Fail to map vq notify %d\n", i); goto err; |