[PATCH net-next 02/12] nfp: devlink add support for getting eswitch mode

[Simon Horman]

From: Jakub Kicinski <jakub.kicin...@netronome.com>

Add app callback for reporting eswitch mode.  Non-SRIOV apps
should not implement this callback, nfp_app code will then
respond with -EOPNOTSUPP.

Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Signed-off-by: Simon Horman <simon.hor...@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/nfp_app.h     | 15 +++++++++++++++
 drivers/net/ethernet/netronome/nfp/nfp_devlink.c | 18 ++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h 
b/drivers/net/ethernet/netronome/nfp/nfp_app.h
index f5e373fa8c3b..0fee14ffa081 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_app.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h
@@ -34,6 +34,8 @@
 #ifndef _NFP_APP_H
 #define _NFP_APP_H 1
 
+#include <net/devlink.h>
+
 struct bpf_prog;
 struct net_device;
 struct pci_dev;
@@ -70,6 +72,7 @@ extern const struct nfp_app_type app_bpf;
  * @setup_tc:  setup TC ndo
  * @tc_busy:   TC HW offload busy (rules loaded)
  * @xdp_offload:    offload an XDP program
+ * @eswitch_mode_get:    get SR-IOV eswitch mode
  */
 struct nfp_app_type {
        enum nfp_app_id id;
@@ -95,6 +98,8 @@ struct nfp_app_type {
        bool (*tc_busy)(struct nfp_app *app, struct nfp_net *nn);
        int (*xdp_offload)(struct nfp_app *app, struct nfp_net *nn,
                           struct bpf_prog *prog);
+
+       enum devlink_eswitch_mode (*eswitch_mode_get)(struct nfp_app *app);
 };
 
 /**
@@ -216,6 +221,16 @@ static inline void nfp_app_ctrl_rx(struct nfp_app *app, 
struct sk_buff *skb)
        app->type->ctrl_msg_rx(app, skb);
 }
 
+static inline int nfp_app_eswitch_mode_get(struct nfp_app *app, u16 *mode)
+{
+       if (!app->type->eswitch_mode_get)
+               return -EOPNOTSUPP;
+
+       *mode = app->type->eswitch_mode_get(app);
+
+       return 0;
+}
+
 const char *nfp_app_mip_name(struct nfp_app *app);
 struct sk_buff *nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size);
 
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c 
b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
index 2609a0f28e81..6c9f29c2e975 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
@@ -149,9 +149,27 @@ nfp_devlink_port_unsplit(struct devlink *devlink, unsigned 
int port_index)
        return ret;
 }
 
+static int nfp_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
+{
+       struct nfp_pf *pf = devlink_priv(devlink);
+       int ret;
+
+       mutex_lock(&pf->lock);
+       if (!pf->app) {
+               ret = -EBUSY;
+               goto out;
+       }
+       ret = nfp_app_eswitch_mode_get(pf->app, mode);
+out:
+       mutex_unlock(&pf->lock);
+
+       return ret;
+}
+
 const struct devlink_ops nfp_devlink_ops = {
        .port_split             = nfp_devlink_port_split,
        .port_unsplit           = nfp_devlink_port_unsplit,
+       .eswitch_mode_get       = nfp_devlink_eswitch_mode_get,
 };
 
 int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
-- 
2.1.4