Report the RAM usage via devlink. This is a useful debug feature. The actual
size depends on the used Hellcreek version:
|root@tsn:~# devlink resource show platform/ff240000.switch
|platform/ff240000.switch:
| name VLAN size 4096 occ 3 unit entry dpipe_tables none
| name FDB size 256 occ 6 unit entry dpipe_tables none
| name RAM size 320 occ 14 unit entry dpipe_tables none
Signed-off-by: Kurt Kanzenbach <k...@kmk-computers.de>
---
drivers/net/dsa/hirschmann/hellcreek.c | 38 ++++++++++++++++++++++++--
drivers/net/dsa/hirschmann/hellcreek.h | 2 ++
2 files changed, 37 insertions(+), 3 deletions(-)
diff --git a/drivers/net/dsa/hirschmann/hellcreek.c
b/drivers/net/dsa/hirschmann/hellcreek.c
index 463137c39db2..c7a439336336 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -221,11 +221,13 @@ static void hellcreek_feature_detect(struct hellcreek
*hellcreek)
features = hellcreek_read(hellcreek, HR_FEABITS0);
- /* Only detect the size of the FDB table. The size and current
- * utilization can be queried via devlink.
+ /* Detect the FDB table size and the maximum RAM page count. The size
+ * and current utilization can be queried via devlink.
*/
hellcreek->fdb_entries = ((features & HR_FEABITS0_FDBBINS_MASK) >>
- HR_FEABITS0_FDBBINS_SHIFT) * 32;
+ HR_FEABITS0_FDBBINS_SHIFT) * 32;
+ hellcreek->page_count = ((features & HR_FEABITS0_PCNT_MASK) >>
+ HR_FEABITS0_PCNT_SHIFT) * 32;
}
static enum dsa_tag_protocol hellcreek_get_tag_protocol(struct dsa_switch *ds,
@@ -1034,10 +1036,23 @@ static u64 hellcreek_devlink_fdb_table_get(void *priv)
return count;
}
+static u64 hellcreek_devlink_ram_usage_get(void *priv)
+{
+ struct hellcreek *hellcreek = priv;
+ u64 usage = 0;
+
+ /* Indicates how many free ram pages are available. */
+ usage = hellcreek_read(hellcreek, HR_PFREE);
+ usage = hellcreek->page_count - usage;
+
+ return usage;
+}
+
static int hellcreek_setup_devlink_resources(struct dsa_switch *ds)
{
struct devlink_resource_size_params size_vlan_params;
struct devlink_resource_size_params size_fdb_params;
+ struct devlink_resource_size_params size_ram_params;
struct hellcreek *hellcreek = ds->priv;
int err;
@@ -1050,6 +1065,11 @@ static int hellcreek_setup_devlink_resources(struct
dsa_switch *ds)
hellcreek->fdb_entries,
1, DEVLINK_RESOURCE_UNIT_ENTRY);
+ devlink_resource_size_params_init(&size_ram_params,
+ hellcreek->page_count,
+ hellcreek->page_count,
+ 1, DEVLINK_RESOURCE_UNIT_ENTRY);
+
err = dsa_devlink_resource_register(ds, "VLAN", VLAN_N_VID,
HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
DEVLINK_RESOURCE_ID_PARENT_TOP,
@@ -1064,6 +1084,13 @@ static int hellcreek_setup_devlink_resources(struct
dsa_switch *ds)
if (err)
goto out;
+ err = dsa_devlink_resource_register(ds, "RAM", hellcreek->page_count,
+
HELLCREEK_DEVLINK_PARAM_ID_RAM_USAGE,
+ DEVLINK_RESOURCE_ID_PARENT_TOP,
+ &size_ram_params);
+ if (err)
+ goto out;
+
dsa_devlink_resource_occ_get_register(ds,
HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
hellcreek_devlink_vlan_table_get,
@@ -1074,6 +1101,11 @@ static int hellcreek_setup_devlink_resources(struct
dsa_switch *ds)
hellcreek_devlink_fdb_table_get,
hellcreek);
+ dsa_devlink_resource_occ_get_register(ds,
+
HELLCREEK_DEVLINK_PARAM_ID_RAM_USAGE,
+ hellcreek_devlink_ram_usage_get,
+ hellcreek);
+
return 0;
out:
diff --git a/drivers/net/dsa/hirschmann/hellcreek.h
b/drivers/net/dsa/hirschmann/hellcreek.h
index 305e76dab34d..9c08aeabbc24 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.h
+++ b/drivers/net/dsa/hirschmann/hellcreek.h
@@ -286,6 +286,7 @@ struct hellcreek {
u64 last_ts; /* Used for overflow detection */
u16 status_out; /* ptp.status_out shadow */
size_t fdb_entries;
+ size_t page_count;
};
/* A Qbv schedule can only started up to 8 seconds in the future. If the delta
@@ -302,6 +303,7 @@ struct hellcreek {
enum hellcreek_devlink_resource_id {
HELLCREEK_DEVLINK_PARAM_ID_VLAN_TABLE,
HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
+ HELLCREEK_DEVLINK_PARAM_ID_RAM_USAGE,
};
#endif /* _HELLCREEK_H_ */
--
2.30.2
