From 530a5678bc0083e84f99f38f77ced8fbb3d18434 Mon Sep 17 00:00:00 2001 From: Jason Wang Date: Wed, 2 Jun 2021 10:15:33 +0800 Subject: [PATCH] vdpa: support packed virtqueue for set/get_vq_state() This patch extends the vdpa_vq_state to support packed virtqueue state which is basically the device/driver ring wrap counters and the avail and used index. This will be used for the virito-vdpa support for the packed virtqueue and the future vhost/vhost-vdpa support for the packed virtqueue. Signed-off-by: Jason Wang Link: https://lore.kernel.org/r/20210602021536.39525-2-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin Reviewed-by: Eli Cohen --- drivers/vdpa/ifcvf/ifcvf_main.c | 4 ++-- drivers/vdpa/mlx5/net/mlx5_vnet.c | 8 ++++---- drivers/vdpa/vdpa_sim/vdpa_sim.c | 4 ++-- drivers/vhost/vdpa.c | 4 ++-- include/linux/vdpa.h | 25 +++++++++++++++++++++++-- 5 files changed, 33 insertions(+), 12 deletions(-) diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index 916a97d..21b78f1 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -264,7 +264,7 @@ static int ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid, { struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev); - state->avail_index = ifcvf_get_vq_state(vf, qid); + state->split.avail_index = ifcvf_get_vq_state(vf, qid); return 0; } @@ -273,7 +273,7 @@ static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid, { struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev); - return ifcvf_set_vq_state(vf, qid, state->avail_index); + return ifcvf_set_vq_state(vf, qid, state->split.avail_index); } static void ifcvf_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid, diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index f4b3623..2a31467 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -1423,8 +1423,8 @@ static int mlx5_vdpa_set_vq_state(struct vdpa_device *vdev, u16 idx, return -EINVAL; } - mvq->used_idx = state->avail_index; - mvq->avail_idx = state->avail_index; + mvq->used_idx = state->split.avail_index; + mvq->avail_idx = state->split.avail_index; return 0; } @@ -1445,7 +1445,7 @@ static int mlx5_vdpa_get_vq_state(struct vdpa_device *vdev, u16 idx, struct vdpa * Since both values should be identical, we take the value of * used_idx which is reported correctly. */ - state->avail_index = mvq->used_idx; + state->split.avail_index = mvq->used_idx; return 0; } @@ -1454,7 +1454,7 @@ static int mlx5_vdpa_get_vq_state(struct vdpa_device *vdev, u16 idx, struct vdpa mlx5_vdpa_warn(mvdev, "failed to query virtqueue\n"); return err; } - state->avail_index = attr.used_index; + state->split.avail_index = attr.used_index; return 0; } diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c index 98f793b..14e024d 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -374,7 +374,7 @@ static int vdpasim_set_vq_state(struct vdpa_device *vdpa, u16 idx, struct vringh *vrh = &vq->vring; spin_lock(&vdpasim->lock); - vrh->last_avail_idx = state->avail_index; + vrh->last_avail_idx = state->split.avail_index; spin_unlock(&vdpasim->lock); return 0; @@ -387,7 +387,7 @@ static int vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx, struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx]; struct vringh *vrh = &vq->vring; - state->avail_index = vrh->last_avail_idx; + state->split.avail_index = vrh->last_avail_idx; return 0; } diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index fb41db3da..210ab35 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -383,7 +383,7 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, if (r) return r; - vq->last_avail_idx = vq_state.avail_index; + vq->last_avail_idx = vq_state.split.avail_index; break; } @@ -401,7 +401,7 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, break; case VHOST_SET_VRING_BASE: - vq_state.avail_index = vq->last_avail_idx; + vq_state.split.avail_index = vq->last_avail_idx; if (ops->set_vq_state(vdpa, idx, &vq_state)) r = -EINVAL; break; diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index f311d22..3357ac9 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -28,13 +28,34 @@ struct vdpa_notification_area { }; /** - * struct vdpa_vq_state - vDPA vq_state definition + * struct vdpa_vq_state_split - vDPA split virtqueue state * @avail_index: available index */ -struct vdpa_vq_state { +struct vdpa_vq_state_split { u16 avail_index; }; +/** + * struct vdpa_vq_state_packed - vDPA packed virtqueue state + * @last_avail_counter: last driver ring wrap counter observed by device + * @last_avail_idx: device available index + * @last_used_counter: device ring wrap counter + * @last_used_idx: used index + */ +struct vdpa_vq_state_packed { + u16 last_avail_counter:1; + u16 last_avail_idx:15; + u16 last_used_counter:1; + u16 last_used_idx:15; +}; + +struct vdpa_vq_state { + union { + struct vdpa_vq_state_split split; + struct vdpa_vq_state_packed packed; + }; +}; + struct vdpa_mgmt_dev; /** -- 2.7.4