nfp: general representor implementation

Provide infrastructure to create and destroy representors of a given type.

Parts based on work by Bert van Leeuwen, Benjamin LaHaise,
and Jakub Kicinski.

Signed-off-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h b/drivers/net/ethernet/netronome/nfp/nfp_app.h
index 0fee14ffa081..af023a0491e7 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_app.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h
@@ -36,6 +36,8 @@
 
 #include <net/devlink.h>
 
+#include "nfp_net_repr.h"
+
 struct bpf_prog;
 struct net_device;
 struct pci_dev;
@@ -73,6 +75,7 @@ extern const struct nfp_app_type app_bpf;
  * @tc_busy:	TC HW offload busy (rules loaded)
  * @xdp_offload:    offload an XDP program
  * @eswitch_mode_get:    get SR-IOV eswitch mode
+ * @repr_get:	get representor netdev
  */
 struct nfp_app_type {
 	enum nfp_app_id id;
@@ -100,6 +103,7 @@ struct nfp_app_type {
 			   struct bpf_prog *prog);
 
 	enum devlink_eswitch_mode (*eswitch_mode_get)(struct nfp_app *app);
+	struct net_device *(*repr_get)(struct nfp_app *app, u32 id);
 };
 
 /**
@@ -108,6 +112,7 @@ struct nfp_app_type {
  * @pf:		backpointer to NFP PF structure
  * @cpp:	pointer to the CPP handle
  * @ctrl:	pointer to ctrl vNIC struct
+ * @reprs:	array of pointers to representors
  * @type:	pointer to const application ops and info
  */
 struct nfp_app {
@@ -116,6 +121,7 @@ struct nfp_app {
 	struct nfp_cpp *cpp;
 
 	struct nfp_net *ctrl;
+	struct nfp_reprs __rcu *reprs[NFP_REPR_TYPE_MAX + 1];
 
 	const struct nfp_app_type *type;
 };
@@ -231,6 +237,18 @@ static inline int nfp_app_eswitch_mode_get(struct nfp_app *app, u16 *mode)
 	return 0;
 }
 
+static inline struct net_device *nfp_app_repr_get(struct nfp_app *app, u32 id)
+{
+	if (unlikely(!app || !app->type->repr_get))
+		return NULL;
+
+	return app->type->repr_get(app, id);
+}
+
+struct nfp_reprs *
+nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
+		  struct nfp_reprs *reprs);
+
 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);