net: mvpp2: debugfs: add hit counter stats for Header Parser entries
One helpful feature to help debug the Header Parser TCAM filter in PPv2
is to be able to see if the entries did match something when a packet
comes in. This can be done by using the built-in hit counter for TCAM
entries.
This commit implements reading the counter, and exposing its value on
debugfs for each filter entry.
The counter is a 16-bits clear-on-read value, located at:
.../mvpp2/<controller>/parser/XXX/hits
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c
index e8a242b..af8fb93 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c
@@ -192,6 +192,22 @@ static int mvpp2_dbgfs_prs_sram_show(struct seq_file *s, void *unused)
DEFINE_SHOW_ATTRIBUTE(mvpp2_dbgfs_prs_sram);
+static int mvpp2_dbgfs_prs_hits_show(struct seq_file *s, void *unused)
+{
+ struct mvpp2_dbgfs_prs_entry *entry = s->private;
+ int val;
+
+ val = mvpp2_prs_hits(entry->priv, entry->tid);
+ if (val < 0)
+ return val;
+
+ seq_printf(s, "%d\n", val);
+
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(mvpp2_dbgfs_prs_hits);
+
static int mvpp2_dbgfs_prs_valid_show(struct seq_file *s, void *unused)
{
struct mvpp2_dbgfs_prs_entry *entry = s->private;
@@ -263,6 +279,9 @@ static int mvpp2_dbgfs_prs_entry_init(struct dentry *parent,
debugfs_create_file("header_data", 0644, prs_entry_dir, entry,
&mvpp2_dbgfs_prs_hdata_fops);
+ debugfs_create_file("hits", 0444, prs_entry_dir, entry,
+ &mvpp2_dbgfs_prs_hits_fops);
+
return 0;
}