Add PHY counter functionality to the shared library. The implementation
is identical for the current QCA807X and QCA808X PHYs.
Signed-off-by: Luo Jie <quic_luoj@quicinc.com>
---
drivers/net/phy/qcom/qcom-phy-lib.c | 82 +++++++++++++++++++++++++++++++++++++
drivers/net/phy/qcom/qcom.h | 16 ++++++++
2 files changed, 98 insertions(+)
diff --git a/drivers/net/phy/qcom/qcom-phy-lib.c b/drivers/net/phy/qcom/qcom-phy-lib.c
index d28815ef56bb..6447e590539b 100644
--- a/drivers/net/phy/qcom/qcom-phy-lib.c
+++ b/drivers/net/phy/qcom/qcom-phy-lib.c
@@ -14,6 +14,40 @@ MODULE_AUTHOR("Matus Ujhelyi");
MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>");
MODULE_LICENSE("GPL");
+struct qcom_phy_hw_stat {
+ const char *string;
+ int devad;
+ u16 cnt_31_16_reg;
+ u16 cnt_15_0_reg;
+};
+
+static const struct qcom_phy_hw_stat qcom_phy_hw_stats[] = {
+ {
+ .string = "phy_rx_good_frame",
+ .devad = MDIO_MMD_AN,
+ .cnt_31_16_reg = QCA808X_MMD7_CNT_RX_GOOD_CRC_31_16,
+ .cnt_15_0_reg = QCA808X_MMD7_CNT_RX_GOOD_CRC_15_0,
+ },
+ {
+ .string = "phy_rx_bad_frame",
+ .devad = MDIO_MMD_AN,
+ .cnt_31_16_reg = 0xffff,
+ .cnt_15_0_reg = QCA808X_MMD7_CNT_RX_BAD_CRC,
+ },
+ {
+ .string = "phy_tx_good_frame",
+ .devad = MDIO_MMD_AN,
+ .cnt_31_16_reg = QCA808X_MMD7_CNT_TX_GOOD_CRC_31_16,
+ .cnt_15_0_reg = QCA808X_MMD7_CNT_TX_GOOD_CRC_15_0,
+ },
+ {
+ .string = "phy_tx_bad_frame",
+ .devad = MDIO_MMD_AN,
+ .cnt_31_16_reg = 0xffff,
+ .cnt_15_0_reg = QCA808X_MMD7_CNT_TX_BAD_CRC,
+ },
+};
+
int at803x_debug_reg_read(struct phy_device *phydev, u16 reg)
{
int ret;
@@ -674,3 +708,51 @@ int qca808x_led_reg_blink_set(struct phy_device *phydev, u16 reg,
return 0;
}
EXPORT_SYMBOL_GPL(qca808x_led_reg_blink_set);
+
+/* Enable CRC checking for both received and transmitted frames to support
+ * accurate counter recording.
+ */
+int qcom_phy_counter_crc_check_en(struct phy_device *phydev)
+{
+ return phy_set_bits_mmd(phydev, MDIO_MMD_AN, QCA808X_MMD7_CNT_CTRL,
+ QCA808X_MMD7_CNT_CTRL_CRC_CHECK_EN);
+}
+EXPORT_SYMBOL_GPL(qcom_phy_counter_crc_check_en);
+
+int qcom_phy_get_sset_count(struct phy_device *phydev)
+{
+ return ARRAY_SIZE(qcom_phy_hw_stats);
+}
+EXPORT_SYMBOL_GPL(qcom_phy_get_sset_count);
+
+void qcom_phy_get_strings(struct phy_device *phydev, u8 *data)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(qcom_phy_hw_stats); i++)
+ ethtool_puts(&data, qcom_phy_hw_stats[i].string);
+}
+EXPORT_SYMBOL_GPL(qcom_phy_get_strings);
+
+void qcom_phy_get_stats(struct phy_device *phydev, struct ethtool_stats *stats,
+ u64 *data)
+{
+ struct qcom_phy_hw_stat stat;
+ unsigned int i;
+ int ret, cnt;
+
+ for (i = 0; i < ARRAY_SIZE(qcom_phy_hw_stats); i++) {
+ stat = qcom_phy_hw_stats[i];
+ data[i] = U64_MAX;
+
+ ret = phy_read_mmd(phydev, stat.devad, stat.cnt_15_0_reg);
+ if (ret >= 0) {
+ cnt = ret;
+
+ ret = phy_read_mmd(phydev, stat.devad, stat.cnt_31_16_reg);
+ if (ret >= 0)
+ data[i] = cnt | ret << 16;
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(qcom_phy_get_stats);
diff --git a/drivers/net/phy/qcom/qcom.h b/drivers/net/phy/qcom/qcom.h
index 4bb541728846..ee2eb11d8d7e 100644
--- a/drivers/net/phy/qcom/qcom.h
+++ b/drivers/net/phy/qcom/qcom.h
@@ -192,6 +192,17 @@
#define AT803X_MIN_DOWNSHIFT 2
#define AT803X_MAX_DOWNSHIFT 9
+#define QCA808X_MMD7_CNT_CTRL 0x8029
+#define QCA808X_MMD7_CNT_CTRL_READ_CLEAR_EN BIT(1)
+#define QCA808X_MMD7_CNT_CTRL_CRC_CHECK_EN BIT(0)
+
+#define QCA808X_MMD7_CNT_RX_GOOD_CRC_31_16 0x802a
+#define QCA808X_MMD7_CNT_RX_GOOD_CRC_15_0 0x802b
+#define QCA808X_MMD7_CNT_RX_BAD_CRC 0x802c
+#define QCA808X_MMD7_CNT_TX_GOOD_CRC_31_16 0x802d
+#define QCA808X_MMD7_CNT_TX_GOOD_CRC_15_0 0x802e
+#define QCA808X_MMD7_CNT_TX_BAD_CRC 0x802f
+
enum stat_access_type {
PHY,
MMD
@@ -241,3 +252,8 @@ int qca808x_led_reg_brightness_set(struct phy_device *phydev,
int qca808x_led_reg_blink_set(struct phy_device *phydev, u16 reg,
unsigned long *delay_on,
unsigned long *delay_off);
+int qcom_phy_counter_crc_check_en(struct phy_device *phydev);
+int qcom_phy_get_sset_count(struct phy_device *phydev);
+void qcom_phy_get_strings(struct phy_device *phydev, u8 *data);
+void qcom_phy_get_stats(struct phy_device *phydev, struct ethtool_stats *stats,
+ u64 *data);
--
2.34.1> +static const struct qcom_phy_hw_stat qcom_phy_hw_stats[] = {
> + {
> + .string = "phy_rx_good_frame",
> + .devad = MDIO_MMD_AN,
> + .cnt_31_16_reg = QCA808X_MMD7_CNT_RX_GOOD_CRC_31_16,
> + .cnt_15_0_reg = QCA808X_MMD7_CNT_RX_GOOD_CRC_15_0,
> + },
> + {
> + .string = "phy_rx_bad_frame",
> + .devad = MDIO_MMD_AN,
> + .cnt_31_16_reg = 0xffff,
> + .cnt_15_0_reg = QCA808X_MMD7_CNT_RX_BAD_CRC,
> + },
> + {
> + .string = "phy_tx_good_frame",
> + .devad = MDIO_MMD_AN,
> + .cnt_31_16_reg = QCA808X_MMD7_CNT_TX_GOOD_CRC_31_16,
> + .cnt_15_0_reg = QCA808X_MMD7_CNT_TX_GOOD_CRC_15_0,
> + },
> + {
> + .string = "phy_tx_bad_frame",
> + .devad = MDIO_MMD_AN,
Are there any counters which might be added later which are not in
MDIO_MMD_AN? It seems pointless having this if it is fixed.
> + .cnt_31_16_reg = 0xffff,
> + .cnt_15_0_reg = QCA808X_MMD7_CNT_TX_BAD_CRC,
> + },
> +};
There has been an attempt to try to standardise PHY statistics. Please
look at:
**
* struct ethtool_phy_stats - PHY-level statistics counters
* @rx_packets: Total successfully received frames
* @rx_bytes: Total successfully received bytes
* @rx_errors: Total received frames with errors (e.g., CRC errors)
* @tx_packets: Total successfully transmitted frames
* @tx_bytes: Total successfully transmitted bytes
* @tx_errors: Total transmitted frames with errors
*
* This structure provides a standardized interface for reporting
* PHY-level statistics counters. It is designed to expose statistics
* commonly provided by PHYs but not explicitly defined in the IEEE
* 802.3 standard.
*/
struct ethtool_phy_stats {
u64 rx_packets;
u64 rx_bytes;
u64 rx_errors;
u64 tx_packets;
u64 tx_bytes;
u64 tx_errors;
};
Please use this if possible.
Andrew
---
pw-bot: cr
On 7/9/2025 12:31 AM, Andrew Lunn wrote:
>> +static const struct qcom_phy_hw_stat qcom_phy_hw_stats[] = {
>> + {
>> + .string = "phy_rx_good_frame",
>> + .devad = MDIO_MMD_AN,
>> + .cnt_31_16_reg = QCA808X_MMD7_CNT_RX_GOOD_CRC_31_16,
>> + .cnt_15_0_reg = QCA808X_MMD7_CNT_RX_GOOD_CRC_15_0,
>> + },
>> + {
>> + .string = "phy_rx_bad_frame",
>> + .devad = MDIO_MMD_AN,
>> + .cnt_31_16_reg = 0xffff,
>> + .cnt_15_0_reg = QCA808X_MMD7_CNT_RX_BAD_CRC,
>> + },
>> + {
>> + .string = "phy_tx_good_frame",
>> + .devad = MDIO_MMD_AN,
>> + .cnt_31_16_reg = QCA808X_MMD7_CNT_TX_GOOD_CRC_31_16,
>> + .cnt_15_0_reg = QCA808X_MMD7_CNT_TX_GOOD_CRC_15_0,
>> + },
>> + {
>> + .string = "phy_tx_bad_frame",
>> + .devad = MDIO_MMD_AN,
>
> Are there any counters which might be added later which are not in
> MDIO_MMD_AN? It seems pointless having this if it is fixed.
Yes, this structure is designed to be extended in the future to support
10G-capable PHY chip, where the counter resides in the MDIO_MMD_PCS
when the link speed is 2500 Mbps or higher. I will add a comment to the
structure to clarify this intent.
>
>> + .cnt_31_16_reg = 0xffff,
>> + .cnt_15_0_reg = QCA808X_MMD7_CNT_TX_BAD_CRC,
>> + },
>> +};
>
> There has been an attempt to try to standardise PHY statistics. Please
> look at:
>
> **
> * struct ethtool_phy_stats - PHY-level statistics counters
> * @rx_packets: Total successfully received frames
> * @rx_bytes: Total successfully received bytes
> * @rx_errors: Total received frames with errors (e.g., CRC errors)
> * @tx_packets: Total successfully transmitted frames
> * @tx_bytes: Total successfully transmitted bytes
> * @tx_errors: Total transmitted frames with errors
> *
> * This structure provides a standardized interface for reporting
> * PHY-level statistics counters. It is designed to expose statistics
> * commonly provided by PHYs but not explicitly defined in the IEEE
> * 802.3 standard.
> */
> struct ethtool_phy_stats {
> u64 rx_packets;
> u64 rx_bytes;
> u64 rx_errors;
> u64 tx_packets;
> u64 tx_bytes;
> u64 tx_errors;
> };
>
> Please use this if possible.
>
> Andrew
Thank you for the suggestion. I will review the standardized PHY
statistics framework and update the implementation accordingly to
ensure alignment.
>
> ---
> pw-bot: cr
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