[PATCH v3 net-next 8/9] net: dsa: wire up devlink info get

[Andrew Lunn]

Allow the DSA drivers to implement the devlink call to get info info,
e.g. driver name, firmware version, ASIC ID, etc.

v2:
Combine declaration and the assignment on a single line.

Signed-off-by: Andrew Lunn <and...@lunn.ch>
---
 include/net/dsa.h |  5 ++++-
 net/dsa/dsa2.c    | 19 ++++++++++++++++---
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 431efb5098be..d16057c5987a 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -612,11 +612,14 @@ struct dsa_switch_ops {
        bool    (*port_rxtstamp)(struct dsa_switch *ds, int port,
                                 struct sk_buff *skb, unsigned int type);
 
-       /* Devlink parameters */
+       /* Devlink parameters, etc */
        int     (*devlink_param_get)(struct dsa_switch *ds, u32 id,
                                     struct devlink_param_gset_ctx *ctx);
        int     (*devlink_param_set)(struct dsa_switch *ds, u32 id,
                                     struct devlink_param_gset_ctx *ctx);
+       int     (*devlink_info_get)(struct dsa_switch *ds,
+                                   struct devlink_info_req *req,
+                                   struct netlink_ext_ack *extack);
 
        /*
         * MTU change functionality. Switches can also adjust their MRU through
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index c0ffc7a2b65f..3cf67f5fe54a 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -21,9 +21,6 @@
 static DEFINE_MUTEX(dsa2_mutex);
 LIST_HEAD(dsa_tree_list);
 
-static const struct devlink_ops dsa_devlink_ops = {
-};
-
 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index)
 {
        struct dsa_switch_tree *dst;
@@ -382,6 +379,22 @@ static void dsa_port_teardown(struct dsa_port *dp)
        dp->setup = false;
 }
 
+static int dsa_devlink_info_get(struct devlink *dl,
+                               struct devlink_info_req *req,
+                               struct netlink_ext_ack *extack)
+{
+       struct dsa_switch *ds = dsa_devlink_to_ds(dl);
+
+       if (ds->ops->devlink_info_get)
+               return ds->ops->devlink_info_get(ds, req, extack);
+
+       return -EOPNOTSUPP;
+}
+
+static const struct devlink_ops dsa_devlink_ops = {
+       .info_get = dsa_devlink_info_get,
+};
+
 static int dsa_switch_setup(struct dsa_switch *ds)
 {
        struct dsa_devlink_priv *dl_priv;
-- 
2.28.0