octeontx2-af: Add NIX RQ, SQ and CQ contexts to debugfs

To aid in debugging NIX block related issues, added support to dump
NIX block LF's RQ, SQ and CQ hardware contexts in debugfs. User can
check which contexts are enabled currently and dump it's current HW
context.

Four new files 'qsize', 'rq_ctx', 'sq_ctx' and 'cq_ctx' are added to the
debugfs at 'sys/kernel/debug/octeontx2/nix/'

'echo <nixlf index> > qsize' will display current enabled CQ/SQ/RQs.
'echo <nixlf> [rq number/all] > rq_ctx',
'echo <nixlf> [sq number/all] > sq_ctx' &
'echo <nixlf> [cq number/all] > cq_ctx' will dump RQ/SQ/CQ's current
hardware context.

Signed-off-by: Prakash Brahmajyosyula <bprakash@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/octeontx2/af/rvu.h

@@ -45,9 +45,14 @@ struct dump_ctx {
 struct rvu_debugfs {
 	struct dentry *root;
 	struct dentry *npa;
+	struct dentry *nix;
 	struct dump_ctx npa_aura_ctx;
 	struct dump_ctx npa_pool_ctx;
+	struct dump_ctx nix_cq_ctx;
+	struct dump_ctx nix_rq_ctx;
+	struct dump_ctx nix_sq_ctx;
 	int npa_qsize_id;
+	int nix_qsize_id;
 };
 #endif