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f791fb4af4
Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Tim Harvey <tharvey@gateworks.com> [fixes]
126 lines
3.7 KiB
Diff
126 lines
3.7 KiB
Diff
From: Florian Fainelli <f.fainelli@gmail.com>
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Date: Tue, 29 Nov 2016 09:57:17 -0800
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Subject: [PATCH] net: phy: broadcom: Add support code for reading PHY counters
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Broadcom PHYs expose a number of PHY error counters: receive errors,
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false carrier sense, SerDes BER count, local and remote receive errors.
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Add support code to allow retrieving these error counters. Since the
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Broadcom PHY library code is used by several drivers, make it possible
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for them to specify the storage for the software copy of the statistics.
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Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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--- a/drivers/net/phy/bcm-phy-lib.c
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+++ b/drivers/net/phy/bcm-phy-lib.c
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@@ -17,6 +17,7 @@
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#include <linux/mdio.h>
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#include <linux/module.h>
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#include <linux/phy.h>
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+#include <linux/ethtool.h>
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#define MII_BCM_CHANNEL_WIDTH 0x2000
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#define BCM_CL45VEN_EEE_ADV 0x3c
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@@ -231,6 +232,75 @@ int bcm_phy_set_eee(struct phy_device *p
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}
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EXPORT_SYMBOL_GPL(bcm_phy_set_eee);
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+struct bcm_phy_hw_stat {
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+ const char *string;
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+ u8 reg;
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+ u8 shift;
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+ u8 bits;
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+};
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+
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+/* Counters freeze at either 0xffff or 0xff, better than nothing */
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+static const struct bcm_phy_hw_stat bcm_phy_hw_stats[] = {
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+ { "phy_receive_errors", MII_BRCM_CORE_BASE12, 0, 16 },
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+ { "phy_serdes_ber_errors", MII_BRCM_CORE_BASE13, 8, 8 },
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+ { "phy_false_carrier_sense_errors", MII_BRCM_CORE_BASE13, 0, 8 },
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+ { "phy_local_rcvr_nok", MII_BRCM_CORE_BASE14, 8, 8 },
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+ { "phy_remote_rcv_nok", MII_BRCM_CORE_BASE14, 0, 8 },
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+};
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+
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+int bcm_phy_get_sset_count(struct phy_device *phydev)
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+{
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+ return ARRAY_SIZE(bcm_phy_hw_stats);
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+}
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+EXPORT_SYMBOL_GPL(bcm_phy_get_sset_count);
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+
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+void bcm_phy_get_strings(struct phy_device *phydev, u8 *data)
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+{
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+ unsigned int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(bcm_phy_hw_stats); i++)
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+ memcpy(data + i * ETH_GSTRING_LEN,
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+ bcm_phy_hw_stats[i].string, ETH_GSTRING_LEN);
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+}
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+EXPORT_SYMBOL_GPL(bcm_phy_get_strings);
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+
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+#ifndef UINT64_MAX
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+#define UINT64_MAX (u64)(~((u64)0))
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+#endif
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+
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+/* Caller is supposed to provide appropriate storage for the library code to
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+ * access the shadow copy
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+ */
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+static u64 bcm_phy_get_stat(struct phy_device *phydev, u64 *shadow,
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+ unsigned int i)
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+{
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+ struct bcm_phy_hw_stat stat = bcm_phy_hw_stats[i];
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+ int val;
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+ u64 ret;
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+
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+ val = phy_read(phydev, stat.reg);
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+ if (val < 0) {
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+ ret = UINT64_MAX;
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+ } else {
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+ val >>= stat.shift;
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+ val = val & ((1 << stat.bits) - 1);
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+ shadow[i] += val;
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+ ret = shadow[i];
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+ }
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+
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+ return ret;
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+}
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+
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+void bcm_phy_get_stats(struct phy_device *phydev, u64 *shadow,
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+ struct ethtool_stats *stats, u64 *data)
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+{
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+ unsigned int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(bcm_phy_hw_stats); i++)
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+ data[i] = bcm_phy_get_stat(phydev, shadow, i);
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+}
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+EXPORT_SYMBOL_GPL(bcm_phy_get_stats);
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+
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MODULE_DESCRIPTION("Broadcom PHY Library");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Broadcom Corporation");
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--- a/drivers/net/phy/bcm-phy-lib.h
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+++ b/drivers/net/phy/bcm-phy-lib.h
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@@ -37,4 +37,10 @@ int bcm_phy_config_intr(struct phy_devic
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int bcm_phy_enable_apd(struct phy_device *phydev, bool dll_pwr_down);
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int bcm_phy_set_eee(struct phy_device *phydev, bool enable);
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+
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+int bcm_phy_get_sset_count(struct phy_device *phydev);
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+void bcm_phy_get_strings(struct phy_device *phydev, u8 *data);
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+void bcm_phy_get_stats(struct phy_device *phydev, u64 *shadow,
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+ struct ethtool_stats *stats, u64 *data);
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+
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#endif /* _LINUX_BCM_PHY_LIB_H */
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--- a/include/linux/brcmphy.h
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+++ b/include/linux/brcmphy.h
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@@ -234,6 +234,9 @@
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#define LPI_FEATURE_EN_DIG1000X 0x4000
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/* Core register definitions*/
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+#define MII_BRCM_CORE_BASE12 0x12
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+#define MII_BRCM_CORE_BASE13 0x13
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+#define MII_BRCM_CORE_BASE14 0x14
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#define MII_BRCM_CORE_BASE1E 0x1E
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#define MII_BRCM_CORE_EXPB0 0xB0
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#define MII_BRCM_CORE_EXPB1 0xB1
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