Messages in this thread Patch in this message | | | From | Eli Cohen <> | Subject | [PATCH vhost next 06/10] vdpa: Add means to communicate vq status on get_vq_state | Date | Thu, 16 Jul 2020 10:23:23 +0300 |
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Currently, get_vq_state() is used only to pass the available index value of a vq. Extend the struct to return status on the VQ to the caller. For now, define VQ_STATE_NOT_READY. In the future it will be extended to include other infomration.
Modify current vdpa driver to update this field.
Reviewed-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Eli Cohen <eli@mellanox.com> --- drivers/vdpa/ifcvf/ifcvf_main.c | 1 + drivers/vdpa/vdpa_sim/vdpa_sim.c | 1 + include/linux/vdpa.h | 9 +++++++++ 3 files changed, 11 insertions(+)
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index 69032ee97824..77e3b3d91167 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -240,6 +240,7 @@ static void ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid, { struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev); + state->state = vf->vring[qid].ready ? 0 : BIT(VQ_STATE_NOT_READY); state->avail_index = ifcvf_get_vq_state(vf, qid); } diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index 599519039f8d..06d974b4bd7b 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -434,6 +434,7 @@ static void vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx, struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx]; struct vringh *vrh = &vq->vring; + state->state = vq->ready ? 0 : BIT(VQ_STATE_NOT_READY); state->avail_index = vrh->last_avail_idx; } diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 7b088bebffe8..bcefa30a3b2f 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -27,12 +27,21 @@ struct vdpa_notification_area { resource_size_t size; }; +/** + * Bitmask describing the status of the vq + */ +enum { + VQ_STATE_NOT_READY = 0, +}; + /** * vDPA vq_state definition * @avail_index: available index + * @state: returned status from get_vq_state */ struct vdpa_vq_state { u16 avail_index; + u32 state; }; /** -- 2.27.0
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