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Subject[PATCH v1 net-next] net: dsa: qca: ar9331: add ethtool stats support
Date
Add stats support for the ar9331 switch.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
drivers/net/dsa/qca/ar9331.c | 113 +++++++++++++++++++++++++++++++++++
1 file changed, 113 insertions(+)

diff --git a/drivers/net/dsa/qca/ar9331.c b/drivers/net/dsa/qca/ar9331.c
index e24a99031b80..f6947fb0182f 100644
--- a/drivers/net/dsa/qca/ar9331.c
+++ b/drivers/net/dsa/qca/ar9331.c
@@ -101,6 +101,9 @@
AR9331_SW_PORT_STATUS_RX_FLOW_EN | AR9331_SW_PORT_STATUS_TX_FLOW_EN | \
AR9331_SW_PORT_STATUS_SPEED_M)

+/* MIB registers */
+#define AR9331_PORT_MIB_COUNTER(_i) (0x20000 + (_i) * 0x100)
+
/* Phy bypass mode
* ------------------------------------------------------------------------
* Bit: | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |10 |11 |12 |13 |14 |15 |
@@ -165,6 +168,61 @@ struct ar9331_sw_priv {
struct reset_control *sw_reset;
};

+struct ar9331_mib_desc {
+ unsigned int size;
+ unsigned int offset;
+ const char *name;
+};
+
+#define MIB_DESC(_s, _o, _n) \
+ { \
+ .size = (_s), \
+ .offset = (_o), \
+ .name = (_n), \
+ }
+
+static const struct ar9331_mib_desc ar9331_mib[] = {
+ MIB_DESC(1, 0x00, "RxBroad"),
+ MIB_DESC(1, 0x04, "RxPause"),
+ MIB_DESC(1, 0x08, "RxMulti"),
+ MIB_DESC(1, 0x0c, "RxFcsErr"),
+ MIB_DESC(1, 0x10, "RxAlignErr"),
+ MIB_DESC(1, 0x14, "RxRunt"),
+ MIB_DESC(1, 0x18, "RxFragment"),
+ MIB_DESC(1, 0x1c, "Rx64Byte"),
+ MIB_DESC(1, 0x20, "Rx128Byte"),
+ MIB_DESC(1, 0x24, "Rx256Byte"),
+ MIB_DESC(1, 0x28, "Rx512Byte"),
+ MIB_DESC(1, 0x2c, "Rx1024Byte"),
+ MIB_DESC(1, 0x30, "Rx1518Byte"),
+ MIB_DESC(1, 0x34, "RxMaxByte"),
+ MIB_DESC(1, 0x38, "RxTooLong"),
+ MIB_DESC(2, 0x3c, "RxGoodByte"),
+ MIB_DESC(2, 0x44, "RxBadByte"),
+ MIB_DESC(1, 0x4c, "RxOverFlow"),
+ MIB_DESC(1, 0x50, "Filtered"),
+ MIB_DESC(1, 0x54, "TxBroad"),
+ MIB_DESC(1, 0x58, "TxPause"),
+ MIB_DESC(1, 0x5c, "TxMulti"),
+ MIB_DESC(1, 0x60, "TxUnderRun"),
+ MIB_DESC(1, 0x64, "Tx64Byte"),
+ MIB_DESC(1, 0x68, "Tx128Byte"),
+ MIB_DESC(1, 0x6c, "Tx256Byte"),
+ MIB_DESC(1, 0x70, "Tx512Byte"),
+ MIB_DESC(1, 0x74, "Tx1024Byte"),
+ MIB_DESC(1, 0x78, "Tx1518Byte"),
+ MIB_DESC(1, 0x7c, "TxMaxByte"),
+ MIB_DESC(1, 0x80, "TxOverSize"),
+ MIB_DESC(2, 0x84, "TxByte"),
+ MIB_DESC(1, 0x8c, "TxCollision"),
+ MIB_DESC(1, 0x90, "TxAbortCol"),
+ MIB_DESC(1, 0x94, "TxMultiCol"),
+ MIB_DESC(1, 0x98, "TxSingleCol"),
+ MIB_DESC(1, 0x9c, "TxExcDefer"),
+ MIB_DESC(1, 0xa0, "TxDefer"),
+ MIB_DESC(1, 0xa4, "TxLateCol"),
+};
+
/* Warning: switch reset will reset last AR9331_SW_MDIO_PHY_MODE_PAGE request
* If some kind of optimization is used, the request should be repeated.
*/
@@ -475,6 +533,58 @@ static void ar9331_sw_phylink_mac_link_up(struct dsa_switch *ds, int port,
dev_err_ratelimited(priv->dev, "%s: %i\n", __func__, ret);
}

+static void ar9331_get_strings(struct dsa_switch *ds, int port, u32 stringset,
+ uint8_t *data)
+{
+ int i;
+
+ if (stringset != ETH_SS_STATS)
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(ar9331_mib); i++)
+ strncpy(data + i * ETH_GSTRING_LEN, ar9331_mib[i].name,
+ ETH_GSTRING_LEN);
+}
+
+static void ar9331_get_ethtool_stats(struct dsa_switch *ds, int port,
+ uint64_t *data)
+{
+ struct ar9331_sw_priv *priv = (struct ar9331_sw_priv *)ds->priv;
+ struct regmap *regmap = priv->regmap;
+ const struct ar9331_mib_desc *mib;
+ u32 reg, i, stat;
+ u64 hi;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(ar9331_mib); i++) {
+ mib = &ar9331_mib[i];
+ reg = AR9331_PORT_MIB_COUNTER(port) + mib->offset;
+
+ ret = regmap_read(regmap, reg, &stat);
+ if (ret)
+ dev_err_ratelimited(priv->dev, "%s: %i\n", __func__,
+ ret);
+ data[i] = stat;
+ if (mib->size == 2) {
+ ret = regmap_read(regmap, reg + 4, &stat);
+ if (ret)
+ dev_err_ratelimited(priv->dev, "%s: %i\n",
+ __func__, ret);
+
+ hi = stat;
+ data[i] |= hi << 32;
+ }
+ }
+}
+
+static int ar9331_get_sset_count(struct dsa_switch *ds, int port, int sset)
+{
+ if (sset != ETH_SS_STATS)
+ return 0;
+
+ return ARRAY_SIZE(ar9331_mib);
+}
+
static const struct dsa_switch_ops ar9331_sw_ops = {
.get_tag_protocol = ar9331_sw_get_tag_protocol,
.setup = ar9331_sw_setup,
@@ -483,6 +593,9 @@ static const struct dsa_switch_ops ar9331_sw_ops = {
.phylink_mac_config = ar9331_sw_phylink_mac_config,
.phylink_mac_link_down = ar9331_sw_phylink_mac_link_down,
.phylink_mac_link_up = ar9331_sw_phylink_mac_link_up,
+ .get_strings = ar9331_get_strings,
+ .get_ethtool_stats = ar9331_get_ethtool_stats,
+ .get_sset_count = ar9331_get_sset_count,
};

static irqreturn_t ar9331_sw_irq(int irq, void *data)
--
2.28.0
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