Re: [PATCH 3/4] vdpa_sim: support vendor satistics

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在 2022/12/21 21:34, Stefano Garzarella 写道:
On Wed, Dec 21, 2022 at 02:16:51PM +0800, Jason Wang wrote:

Little typo in the title s/satistics/statistics


Fixed.



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

Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/vdpa/vdpa_sim/vdpa_sim.c | 13 +++++++++++++
drivers/vdpa/vdpa_sim/vdpa_sim.h |  3 +++
2 files changed, 16 insertions(+)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 55aaa023a6e2..02e892f819e7 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -426,6 +426,18 @@ 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 -EINVAL;

Maybe -EOPNOTSUPP is better when the device doesn't support it.
Like we do in vendor_stats_fill() in drivers/vdpa/vdpa.c


That's right.


+}
+
static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa)
{
    return VDPASIM_QUEUE_ALIGN;
@@ -710,6 +722,7 @@ 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,

Should we add this callback also in vdpasim_batch_config_ops?


Yes.

Thanks



Thanks,
Stefano

    .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 51c070a543f1..d2a08c0abad7 100644
--- 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 */
--
2.25.1



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