From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Thu, 11 Jan 2018 20:29:10 -0800
Subject: nfp: bpf: add map data structure
Patch-mainline: v4.16-rc1
Git-commit: 4da98eea7903670d7b1d9ac83bbc6502a60bf0fd
References: bsc#1109837

To be able to split code into reasonable chunks we need to add
the map data structures already.  Later patches will add code
piece by piece.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/netronome/nfp/bpf/main.c |    7 ++++++-
 drivers/net/ethernet/netronome/nfp/bpf/main.h |   18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/netronome/nfp/bpf/main.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c
@@ -313,6 +313,8 @@ static int nfp_bpf_init(struct nfp_app *
 	bpf->app = app;
 	app->priv = bpf;
 
+	INIT_LIST_HEAD(&bpf->map_list);
+
 	err = nfp_bpf_parse_capabilities(app);
 	if (err)
 		goto err_free_bpf;
@@ -326,7 +328,10 @@ err_free_bpf:
 
 static void nfp_bpf_clean(struct nfp_app *app)
 {
-	kfree(app->priv);
+	struct nfp_app_bpf *bpf = app->priv;
+
+	WARN_ON(!list_empty(&bpf->map_list));
+	kfree(bpf);
 }
 
 const struct nfp_app_type app_bpf = {
--- a/drivers/net/ethernet/netronome/nfp/bpf/main.h
+++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h
@@ -93,6 +93,8 @@ enum pkt_vec {
  * struct nfp_app_bpf - bpf app priv structure
  * @app:		backpointer to the app
  *
+ * @map_list:		list of offloaded maps
+ *
  * @adjust_head:	adjust head capability
  * @flags:		extra flags for adjust head
  * @off_min:		minimal packet offset within buffer required
@@ -103,6 +105,8 @@ enum pkt_vec {
 struct nfp_app_bpf {
 	struct nfp_app *app;
 
+	struct list_head map_list;
+
 	struct nfp_bpf_cap_adjust_head {
 		u32 flags;
 		int off_min;
@@ -112,6 +116,20 @@ struct nfp_app_bpf {
 	} adjust_head;
 };
 
+/**
+ * struct nfp_bpf_map - private per-map data attached to BPF maps for offload
+ * @offmap:	pointer to the offloaded BPF map
+ * @bpf:	back pointer to bpf app private structure
+ * @tid:	table id identifying map on datapath
+ * @l:		link on the nfp_app_bpf->map_list list
+ */
+struct nfp_bpf_map {
+	struct bpf_offloaded_map *offmap;
+	struct nfp_app_bpf *bpf;
+	u32 tid;
+	struct list_head l;
+};
+
 struct nfp_prog;
 struct nfp_insn_meta;
 typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *);