[PATCH v3 net-next 10/12] net: mscc: ocelot: hide access to ocelot_stats_layout behind a helper

Vladimir Oltean
2023-01-17T09:04:28Z

Some hardware instances of the ocelot driver support the MAC Merge
layer, which gives access to an extra preemptible MAC. This has
implications upon the statistics. There will be a stats layout when MM
isn't supported, and a different one when it is.
The ocelot_stats_layout() helper will return the correct one.
In preparation of that, refactor the existing code to use this helper.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
v2->v3: none
v1->v2: patch is new (v1 was written for enetc)

drivers/net/ethernet/mscc/ocelot_stats.c | 40 +++++++++++++++++-------
1 file changed, 29 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/mscc/ocelot_stats.c b/drivers/net/ethernet/mscc/ocelot_stats.c
index 01306172b7f7..551e3cbfae79 100644
--- a/drivers/net/ethernet/mscc/ocelot_stats.c
+++ b/drivers/net/ethernet/mscc/ocelot_stats.c
@@ -228,6 +228,12 @@ static const struct ocelot_stat_layout ocelot_stats_layout[OCELOT_NUM_STATS] = {
OCELOT_COMMON_STATS,
};

+static const struct ocelot_stat_layout *
+ocelot_get_stats_layout(struct ocelot *ocelot)
+{
+ return ocelot_stats_layout;
+}
+
/* Read the counters from hardware and keep them in region->buf.
* Caller must hold &ocelot->stat_view_lock.
*/
@@ -306,16 +312,19 @@ static void ocelot_check_stats_work(struct work_struct *work)

void ocelot_get_strings(struct ocelot *ocelot, int port, u32 sset, u8 *data)
{
+ const struct ocelot_stat_layout *layout;
int i;

if (sset != ETH_SS_STATS)
return;

+ layout = ocelot_get_stats_layout(ocelot);
+
for (i = 0; i < OCELOT_NUM_STATS; i++) {
- if (ocelot_stats_layout[i].name[0] == '\0')
+ if (layout[i].name[0] == '\0')
continue;

- memcpy(data, ocelot_stats_layout[i].name, ETH_GSTRING_LEN);
+ memcpy(data, layout[i].name, ETH_GSTRING_LEN);
data += ETH_GSTRING_LEN;
}
}
@@ -350,13 +359,16 @@ static void ocelot_port_stats_run(struct ocelot *ocelot, int port, void *priv,

int ocelot_get_sset_count(struct ocelot *ocelot, int port, int sset)
{
+ const struct ocelot_stat_layout *layout;
int i, num_stats = 0;

if (sset != ETH_SS_STATS)
return -EOPNOTSUPP;

+ layout = ocelot_get_stats_layout(ocelot);
+
for (i = 0; i < OCELOT_NUM_STATS; i++)
- if (ocelot_stats_layout[i].name[0] != '\0')
+ if (layout[i].name[0] != '\0')
num_stats++;

return num_stats;
@@ -366,14 +378,17 @@ EXPORT_SYMBOL(ocelot_get_sset_count);
static void ocelot_port_ethtool_stats_cb(struct ocelot *ocelot, int port,
void *priv)
{
+ const struct ocelot_stat_layout *layout;
u64 *data = priv;
int i;

+ layout = ocelot_get_stats_layout(ocelot);
+
/* Copy all supported counters */
for (i = 0; i < OCELOT_NUM_STATS; i++) {
int index = port * OCELOT_NUM_STATS + i;

- if (ocelot_stats_layout[i].name[0] == '\0')
+ if (layout[i].name[0] == '\0')
continue;

*data++ = ocelot->stats[index];
@@ -602,16 +617,19 @@ EXPORT_SYMBOL(ocelot_port_get_stats64);
static int ocelot_prepare_stats_regions(struct ocelot *ocelot)
{
struct ocelot_stats_region *region = NULL;
+ const struct ocelot_stat_layout *layout;
unsigned int last = 0;
int i;

INIT_LIST_HEAD(&ocelot->stats_regions);

+ layout = ocelot_get_stats_layout(ocelot);
+
for (i = 0; i < OCELOT_NUM_STATS; i++) {
- if (!ocelot_stats_layout[i].reg)
+ if (!layout[i].reg)
continue;

- if (region && ocelot_stats_layout[i].reg == last + 4) {
+ if (region && layout[i].reg == last + 4) {
region->count++;
} else {
region = devm_kzalloc(ocelot->dev, sizeof(*region),
@@ -620,17 +638,17 @@ static int ocelot_prepare_stats_regions(struct ocelot *ocelot)
return -ENOMEM;

/* enum ocelot_stat must be kept sorted in the same
- * order as ocelot_stats_layout[i].reg in order to have
- * efficient bulking
+ * order as layout[i].reg in order to have efficient
+ * bulking
*/
- WARN_ON(last >= ocelot_stats_layout[i].reg);
+ WARN_ON(last >= layout[i].reg);

- region->base = ocelot_stats_layout[i].reg;
+ region->base = layout[i].reg;
region->count = 1;
list_add_tail(&region->node, &ocelot->stats_regions);
}

- last = ocelot_stats_layout[i].reg;
+ last = layout[i].reg;
}

list_for_each_entry(region, &ocelot->stats_regions, node) {
--
2.34.1