vdpa_sim: support vendor statistics

This patch adds a new config ops callback to allow individual
simulator to implement the vendor stats callback.

Acked-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221223055548.27810-4-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 45905db17f86cb28914440b8e7f75e92900b7a20..e7eb658f55fbae7d1871a8aede79f14072f14020 100644 (file)
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -432,6 +432,18 @@ static int vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx,
        return 0;
 }
 
+static int vdpasim_get_vq_stats(struct vdpa_device *vdpa, u16 idx,
+                               struct sk_buff *msg,
+                               struct netlink_ext_ack *extack)
+{
+       struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+
+       if (vdpasim->dev_attr.get_stats)
+               return vdpasim->dev_attr.get_stats(vdpasim, idx,
+                                                  msg, extack);
+       return -EOPNOTSUPP;
+}
+
 static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
 {
        return VDPASIM_QUEUE_ALIGN;
@@ -739,6 +751,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
        .set_vq_ready           = vdpasim_set_vq_ready,
        .get_vq_ready           = vdpasim_get_vq_ready,
        .set_vq_state           = vdpasim_set_vq_state,
+       .get_vendor_vq_stats    = vdpasim_get_vq_stats,
        .get_vq_state           = vdpasim_get_vq_state,
        .get_vq_align           = vdpasim_get_vq_align,
        .get_vq_group           = vdpasim_get_vq_group,
@@ -773,6 +786,7 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
        .set_vq_ready           = vdpasim_set_vq_ready,
        .get_vq_ready           = vdpasim_get_vq_ready,
        .set_vq_state           = vdpasim_set_vq_state,
+       .get_vendor_vq_stats    = vdpasim_get_vq_stats,
        .get_vq_state           = vdpasim_get_vq_state,
        .get_vq_align           = vdpasim_get_vq_align,
        .get_vq_group           = vdpasim_get_vq_group,

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.h b/drivers/vdpa/vdpa_sim/vdpa_sim.h
index 8a379ef4196cd5e427b56c7279dba37c28179e3c..926b694d83cf302eb4bd5c060b645b42c99d21d2 100644 (file)
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.h
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.h
@@ -48,6 +48,9 @@ struct vdpasim_dev_attr {
        work_func_t work_fn;
        void (*get_config)(struct vdpasim *vdpasim, void *config);
        void (*set_config)(struct vdpasim *vdpasim, const void *config);
+       int (*get_stats)(struct vdpasim *vdpasim, u16 idx,
+                        struct sk_buff *msg,
+                        struct netlink_ext_ack *extack);
 };
 
 /* State of each vdpasim device */