[PATCH 2/7] net: dsa: ar8xxx: add ethtool hw statistics support
From: Mathieu Olivari
Date: Thu May 28 2015 - 21:43:47 EST
MIB counters can now be reported through each switch port by using
"ethtool -S".
Signed-off-by: Mathieu Olivari <mathieu@xxxxxxxxxxxxxx>
---
drivers/net/dsa/ar8xxx.c | 106 +++++++++++++++++++++++++++++++++++++++++++----
drivers/net/dsa/ar8xxx.h | 47 +++++++++++++++++++++
2 files changed, 146 insertions(+), 7 deletions(-)
diff --git a/drivers/net/dsa/ar8xxx.c b/drivers/net/dsa/ar8xxx.c
index 4ce3ffc..2f0fa4d 100644
--- a/drivers/net/dsa/ar8xxx.c
+++ b/drivers/net/dsa/ar8xxx.c
@@ -22,6 +22,55 @@
#include "ar8xxx.h"
+#define MIB_DESC(_s, _o, _n) \
+ { \
+ .size = (_s), \
+ .offset = (_o), \
+ .name = (_n), \
+ }
+
+static const struct ar8xxx_mib_desc ar8327_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"),
+};
+
u32
ar8xxx_mii_read32(struct mii_bus *bus, int phy_id, int regnum)
{
@@ -184,6 +233,10 @@ static int ar8xxx_setup(struct dsa_switch *ds)
if (ret < 0)
return ret;
+ /* Enable MIB counters */
+ ar8xxx_reg_set(ds, AR8327_REG_MIB, AR8327_MIB_CPU_KEEP);
+ ar8xxx_write(ds, AR8327_REG_MODULE_EN, AR8327_MODULE_EN_MIB);
+
/* Disable forwarding by default on all ports */
for (i = 0; i < AR8327_NUM_PORTS; i++)
ar8xxx_rmw(ds, AR8327_PORT_LOOKUP_CTRL(i),
@@ -228,6 +281,42 @@ ar8xxx_phy_write(struct dsa_switch *ds, int phy, int regnum, u16 val)
return mdiobus_write(bus, phy, regnum, val);
}
+static void ar8xxx_get_strings(struct dsa_switch *ds, int phy, uint8_t *data)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
+ strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name,
+ ETH_GSTRING_LEN);
+ }
+}
+
+static void ar8xxx_get_ethtool_stats(struct dsa_switch *ds, int phy,
+ uint64_t *data)
+{
+ const struct ar8xxx_mib_desc *mib;
+ uint32_t reg, i, port;
+ u64 hi;
+
+ port = phy_to_port(phy);
+
+ for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
+ mib = &ar8327_mib[i];
+ reg = AR8327_PORT_MIB_COUNTER(port) + mib->offset;
+
+ data[i] = ar8xxx_read(ds, reg);
+ if (mib->size == 2) {
+ hi = ar8xxx_read(ds, reg + 4);
+ data[i] |= hi << 32;
+ }
+ }
+}
+
+static int ar8xxx_get_sset_count(struct dsa_switch *ds)
+{
+ return ARRAY_SIZE(ar8327_mib);
+}
+
static void ar8xxx_poll_link(struct dsa_switch *ds)
{
int i = 0;
@@ -275,13 +364,16 @@ static void ar8xxx_poll_link(struct dsa_switch *ds)
}
static struct dsa_switch_driver ar8xxx_switch_driver = {
- .tag_protocol = DSA_TAG_PROTO_NONE,
- .probe = ar8xxx_probe,
- .setup = ar8xxx_setup,
- .set_addr = ar8xxx_set_addr,
- .poll_link = ar8xxx_poll_link,
- .phy_read = ar8xxx_phy_read,
- .phy_write = ar8xxx_phy_write,
+ .tag_protocol = DSA_TAG_PROTO_NONE,
+ .probe = ar8xxx_probe,
+ .setup = ar8xxx_setup,
+ .set_addr = ar8xxx_set_addr,
+ .poll_link = ar8xxx_poll_link,
+ .phy_read = ar8xxx_phy_read,
+ .phy_write = ar8xxx_phy_write,
+ .get_strings = ar8xxx_get_strings,
+ .get_ethtool_stats = ar8xxx_get_ethtool_stats,
+ .get_sset_count = ar8xxx_get_sset_count,
};
static int __init ar8xxx_init(void)
diff --git a/drivers/net/dsa/ar8xxx.h b/drivers/net/dsa/ar8xxx.h
index a29b6d3..7c7a125 100644
--- a/drivers/net/dsa/ar8xxx.h
+++ b/drivers/net/dsa/ar8xxx.h
@@ -18,6 +18,12 @@
#include <linux/delay.h>
+struct ar8xxx_mib_desc {
+ unsigned int size;
+ unsigned int offset;
+ const char *name;
+};
+
#define AR8327_NUM_PORTS 7
#define PHY_ID_QCA8337 0x004dd036
@@ -31,6 +37,14 @@
#define AR8327_PORT_PAD_RGMII_RX_DELAY_EN BIT(24)
#define AR8327_PORT_PAD_SGMII_EN BIT(7)
+#define AR8327_REG_MODULE_EN 0x030
+#define AR8327_MODULE_EN_MIB BIT(0)
+#define AR8327_MODULE_EN_ACL BIT(1)
+#define AR8327_MODULE_EN_L3 BIT(2)
+
+#define AR8327_REG_MIB 0x034
+#define AR8327_MIB_CPU_KEEP BIT(20)
+
#define AR8327_REG_PORT_STATUS(_i) (0x07c + (_i) * 4)
#define AR8XXX_PORT_STATUS_SPEED GENMASK(2, 0)
#define AR8XXX_PORT_STATUS_SPEED_S 0
@@ -52,6 +66,8 @@
#define AR8327_PORT_LOOKUP_LEARN BIT(20)
#define AR8327_PORT_LOOKUP_ING_MIRROR_EN BIT(25)
+#define AR8327_PORT_MIB_COUNTER(_i) (0x1000 + (_i) * 0x100)
+
/* port speed */
enum {
AR8XXX_PORT_SPEED_10M = 0,
@@ -60,6 +76,25 @@ enum {
AR8XXX_PORT_SPEED_ERR = 3,
};
+static inline int port_to_phy(int port)
+{
+ if (port >= 1 && port <= 6)
+ return port - 1;
+
+ return -1;
+}
+
+static inline int phy_to_port(int phy)
+{
+ if (phy < 5)
+ return phy + 1;
+
+ return -1;
+}
+
+u32
+ar8xxx_rmw(struct dsa_switch *ds, int reg, u32 mask, u32 val);
+
static inline void
split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
{
@@ -79,4 +114,16 @@ wait_for_page_switch(void)
udelay(5);
}
+static inline void
+ar8xxx_reg_set(struct dsa_switch *ds, int reg, u32 val)
+{
+ ar8xxx_rmw(ds, reg, 0, val);
+}
+
+static inline void
+ar8xxx_reg_clear(struct dsa_switch *ds, int reg, u32 val)
+{
+ ar8xxx_rmw(ds, reg, val, 0);
+}
+
#endif /* __AR8XXX_H */
--
2.1.4
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