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Subject[PATCH net-next 5/8] net: dsa: microchip: add support for ethtool port counters
Date
Reused the KSZ common APIs for get_ethtool_stats() & get_sset_count()
along with relevant lan937x hooks for KSZ common layer and added
support for get_strings()

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
---
drivers/net/dsa/microchip/lan937x_dev.c | 36 ++++++++++++++++++++++++
drivers/net/dsa/microchip/lan937x_main.c | 18 ++++++++++++
2 files changed, 54 insertions(+)

diff --git a/drivers/net/dsa/microchip/lan937x_dev.c b/drivers/net/dsa/microchip/lan937x_dev.c
index 84540180ff2f..20ee485fb796 100644
--- a/drivers/net/dsa/microchip/lan937x_dev.c
+++ b/drivers/net/dsa/microchip/lan937x_dev.c
@@ -209,6 +209,40 @@ static void lan937x_flush_dyn_mac_table(struct ksz_device *dev, int port)
}
}

+static void lan937x_r_mib_cnt(struct ksz_device *dev, int port, u16 addr,
+ u64 *cnt)
+{
+ unsigned int val;
+ u32 data;
+ int ret;
+
+ /* Enable MIB Counter read*/
+ data = MIB_COUNTER_READ;
+ data |= (addr << MIB_COUNTER_INDEX_S);
+ lan937x_pwrite32(dev, port, REG_PORT_MIB_CTRL_STAT__4, data);
+
+ ret = regmap_read_poll_timeout(dev->regmap[2],
+ PORT_CTRL_ADDR(port,
+ REG_PORT_MIB_CTRL_STAT__4),
+ val, !(val & MIB_COUNTER_READ), 10, 1000);
+ /* failed to read MIB. get out of loop */
+ if (ret) {
+ dev_err(dev->dev, "Failed to get MIB\n");
+ return;
+ }
+
+ /* count resets upon read */
+ lan937x_pread32(dev, port, REG_PORT_MIB_DATA, &data);
+ *cnt += data;
+}
+
+static void lan937x_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
+ u64 *dropped, u64 *cnt)
+{
+ addr = lan937x_mib_names[addr].index;
+ lan937x_r_mib_cnt(dev, port, addr, cnt);
+}
+
static void lan937x_port_init_cnt(struct ksz_device *dev, int port)
{
struct ksz_port_mib *mib = &dev->ports[port].mib;
@@ -851,6 +885,8 @@ const struct ksz_dev_ops lan937x_dev_ops = {
.cfg_port_member = lan937x_cfg_port_member,
.flush_dyn_mac_table = lan937x_flush_dyn_mac_table,
.port_setup = lan937x_port_setup,
+ .r_mib_cnt = lan937x_r_mib_cnt,
+ .r_mib_pkt = lan937x_r_mib_pkt,
.port_init_cnt = lan937x_port_init_cnt,
.shutdown = lan937x_reset_switch,
.detect = lan937x_switch_detect,
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index b38735e36aef..5693c59df497 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -69,6 +69,21 @@ static int lan937x_phy_write16(struct dsa_switch *ds, int addr, int reg,
return lan937x_t1_tx_phy_write(dev, addr, reg, val);
}

+static void lan937x_get_strings(struct dsa_switch *ds, int port,
+ u32 stringset, uint8_t *buf)
+{
+ struct ksz_device *dev = ds->priv;
+ int i;
+
+ if (stringset != ETH_SS_STATS)
+ return;
+
+ for (i = 0; i < dev->mib_cnt; i++) {
+ memcpy(buf + i * ETH_GSTRING_LEN, lan937x_mib_names[i].string,
+ ETH_GSTRING_LEN);
+ }
+}
+
static void lan937x_port_stp_state_set(struct dsa_switch *ds, int port,
u8 state)
{
@@ -371,6 +386,9 @@ const struct dsa_switch_ops lan937x_switch_ops = {
.phy_read = lan937x_phy_read16,
.phy_write = lan937x_phy_write16,
.port_enable = ksz_enable_port,
+ .get_strings = lan937x_get_strings,
+ .get_ethtool_stats = ksz_get_ethtool_stats,
+ .get_sset_count = ksz_sset_count,
.port_bridge_join = ksz_port_bridge_join,
.port_bridge_leave = ksz_port_bridge_leave,
.port_stp_state_set = lan937x_port_stp_state_set,
--
2.25.1
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