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net: dsa: hellcreek: Add devlink FDB region

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Allow to dump the FDB table via devlink. This is a useful debugging feature.

Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kurt Kanzenbach 2021-03-13 10:39:39 +01:00 committed by David S. Miller
parent eb5f3d3141
commit 292cd449fe
2 changed files with 63 additions and 0 deletions
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62
drivers/net/dsa/hirschmann/hellcreek.c
View File

@ -1111,18 +1111,62 @@ static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl,
return 0;
}
static int hellcreek_devlink_region_fdb_snapshot(struct devlink *dl,
const struct devlink_region_ops *ops,
struct netlink_ext_ack *extack,
u8 **data)
{
struct dsa_switch *ds = dsa_devlink_to_ds(dl);
struct hellcreek_fdb_entry *table, *entry;
struct hellcreek *hellcreek = ds->priv;
size_t i;
table = kcalloc(hellcreek->fdb_entries, sizeof(*entry), GFP_KERNEL);
if (!table)
return -ENOMEM;
entry = table;
mutex_lock(&hellcreek->reg_lock);
/* Start table read */
hellcreek_read(hellcreek, HR_FDBMAX);
hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
for (i = 0; i < hellcreek->fdb_entries; ++i, ++entry) {
/* Read current entry */
hellcreek_populate_fdb_entry(hellcreek, entry, i);
/* Advance read pointer */
hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
}
mutex_unlock(&hellcreek->reg_lock);
*data = (u8 *)table;
return 0;
}
static struct devlink_region_ops hellcreek_region_vlan_ops = {
.name = "vlan",
.snapshot = hellcreek_devlink_region_vlan_snapshot,
.destructor = kfree,
};
static struct devlink_region_ops hellcreek_region_fdb_ops = {
.name = "fdb",
.snapshot = hellcreek_devlink_region_fdb_snapshot,
.destructor = kfree,
};
static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
{
struct hellcreek *hellcreek = ds->priv;
struct devlink_region_ops *ops;
struct devlink_region *region;
u64 size;
int ret;
/* VLAN table */
size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry);
@ -1134,13 +1178,31 @@ static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
hellcreek->vlan_region = region;
/* FDB table */
size = hellcreek->fdb_entries * sizeof(struct hellcreek_fdb_entry);
ops = &hellcreek_region_fdb_ops;
region = dsa_devlink_region_create(ds, ops, 1, size);
if (IS_ERR(region)) {
ret = PTR_ERR(region);
goto err_fdb;
}
hellcreek->fdb_region = region;
return 0;
err_fdb:
dsa_devlink_region_destroy(hellcreek->vlan_region);
return ret;
}
static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds)
{
struct hellcreek *hellcreek = ds->priv;
dsa_devlink_region_destroy(hellcreek->fdb_region);
dsa_devlink_region_destroy(hellcreek->vlan_region);
}

1
drivers/net/dsa/hirschmann/hellcreek.h
View File

@ -279,6 +279,7 @@ struct hellcreek {
struct mutex vlan_lock; /* VLAN bitmaps lock */
struct mutex ptp_lock; /* PTP IP register lock */
struct devlink_region *vlan_region;
struct devlink_region *fdb_region;
void __iomem *base;
void __iomem *ptp_base;
u16 swcfg; /* swcfg shadow */