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Message-Id: <1515893565-29585-2-git-send-email-andrew@lunn.ch>
Date: Sun, 14 Jan 2018 02:32:44 +0100
From: Andrew Lunn <andrew@...n.ch>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next 1/2] net: dsa: mv88e6xxx: Decode ATU problem interrupt
When there is a problem with the ATU, an interrupt can be
generated. Trap this interrupt and decode the registers to determine
what the problem was, then log the error.
Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
drivers/net/dsa/mv88e6xxx/chip.c | 9 +++-
drivers/net/dsa/mv88e6xxx/chip.h | 1 +
drivers/net/dsa/mv88e6xxx/global1.h | 8 ++-
drivers/net/dsa/mv88e6xxx/global1_atu.c | 87 +++++++++++++++++++++++++++++++++
4 files changed, 103 insertions(+), 2 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index fc512c98f2f8..97d8bc94cee7 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3976,11 +3976,15 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
if (err)
goto out_g1_irq;
}
+
+ err = mv88e6xxx_g1_atu_prob_irq_setup(chip);
+ if (err)
+ goto out_g2_irq;
}
err = mv88e6xxx_mdios_register(chip, np);
if (err)
- goto out_g2_irq;
+ goto out_g1_atu_prob_irq;
err = mv88e6xxx_register_switch(chip);
if (err)
@@ -3990,6 +3994,8 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev)
out_mdio:
mv88e6xxx_mdios_unregister(chip);
+out_g1_atu_prob_irq:
+ mv88e6xxx_g1_atu_prob_irq_free(chip);
out_g2_irq:
if (chip->info->g2_irqs > 0 && chip->irq > 0)
mv88e6xxx_g2_irq_free(chip);
@@ -4013,6 +4019,7 @@ static void mv88e6xxx_remove(struct mdio_device *mdiodev)
mv88e6xxx_mdios_unregister(chip);
if (chip->irq > 0) {
+ mv88e6xxx_g1_atu_prob_irq_free(chip);
if (chip->info->g2_irqs > 0)
mv88e6xxx_g2_irq_free(chip);
mutex_lock(&chip->reg_lock);
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index 334f6f7544ba..4dc4a11c6e16 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -207,6 +207,7 @@ struct mv88e6xxx_chip {
int irq;
int device_irq;
int watchdog_irq;
+ int atu_prob_irq;
};
struct mv88e6xxx_bus_ops {
diff --git a/drivers/net/dsa/mv88e6xxx/global1.h b/drivers/net/dsa/mv88e6xxx/global1.h
index b0dc7518b47f..7afa8072fe91 100644
--- a/drivers/net/dsa/mv88e6xxx/global1.h
+++ b/drivers/net/dsa/mv88e6xxx/global1.h
@@ -31,7 +31,7 @@
#define MV88E6XXX_G1_STS_IRQ_STATS 6
#define MV88E6XXX_G1_STS_IRQ_VTU_PROBLEM 5
#define MV88E6XXX_G1_STS_IRQ_VTU_DONE 4
-#define MV88E6XXX_G1_STS_IRQ_ATU_PROBLEM 3
+#define MV88E6XXX_G1_STS_IRQ_ATU_PROB 3
#define MV88E6XXX_G1_STS_IRQ_ATU_DONE 2
#define MV88E6XXX_G1_STS_IRQ_TCAM_DONE 1
#define MV88E6XXX_G1_STS_IRQ_EEPROM_DONE 0
@@ -122,6 +122,10 @@
#define MV88E6XXX_G1_ATU_OP_FLUSH_MOVE_ALL_DB 0x5000
#define MV88E6XXX_G1_ATU_OP_FLUSH_MOVE_NON_STATIC_DB 0x6000
#define MV88E6XXX_G1_ATU_OP_GET_CLR_VIOLATION 0x7000
+#define MV88E6XXX_G1_ATU_OP_AGE_OUT_VIOLATION BIT(7)
+#define MV88E6XXX_G1_ATU_OP_MEMBER_VIOLATION BIT(6)
+#define MV88E6XXX_G1_ATU_OP_MISS_VIOLTATION BIT(5)
+#define MV88E6XXX_G1_ATU_OP_FULL_VIOLATION BIT(4)
/* Offset 0x0C: ATU Data Register */
#define MV88E6XXX_G1_ATU_DATA 0x0c
@@ -255,6 +259,8 @@ int mv88e6xxx_g1_atu_loadpurge(struct mv88e6xxx_chip *chip, u16 fid,
int mv88e6xxx_g1_atu_flush(struct mv88e6xxx_chip *chip, u16 fid, bool all);
int mv88e6xxx_g1_atu_remove(struct mv88e6xxx_chip *chip, u16 fid, int port,
bool all);
+int mv88e6xxx_g1_atu_prob_irq_setup(struct mv88e6xxx_chip *chip);
+void mv88e6xxx_g1_atu_prob_irq_free(struct mv88e6xxx_chip *chip);
int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
struct mv88e6xxx_vtu_entry *entry);
diff --git a/drivers/net/dsa/mv88e6xxx/global1_atu.c b/drivers/net/dsa/mv88e6xxx/global1_atu.c
index efeef4b01442..b97de9d36337 100644
--- a/drivers/net/dsa/mv88e6xxx/global1_atu.c
+++ b/drivers/net/dsa/mv88e6xxx/global1_atu.c
@@ -9,6 +9,8 @@
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
#include "chip.h"
#include "global1.h"
@@ -307,3 +309,88 @@ int mv88e6xxx_g1_atu_remove(struct mv88e6xxx_chip *chip, u16 fid, int port,
return mv88e6xxx_g1_atu_move(chip, fid, from_port, to_port, all);
}
+
+static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_id)
+{
+ struct mv88e6xxx_chip *chip = dev_id;
+ struct mv88e6xxx_atu_entry entry;
+ int err;
+ u16 val;
+
+ mutex_lock(&chip->reg_lock);
+
+ err = mv88e6xxx_g1_atu_op(chip, 0,
+ MV88E6XXX_G1_ATU_OP_GET_CLR_VIOLATION);
+ if (err)
+ goto out;
+
+ err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_ATU_OP, &val);
+ if (err)
+ goto out;
+
+ err = mv88e6xxx_g1_atu_data_read(chip, &entry);
+ if (err)
+ goto out;
+
+ err = mv88e6xxx_g1_atu_mac_read(chip, &entry);
+ if (err)
+ goto out;
+
+ mutex_unlock(&chip->reg_lock);
+
+ if (val & MV88E6XXX_G1_ATU_OP_AGE_OUT_VIOLATION) {
+ dev_err_ratelimited(chip->dev,
+ "ATU age out violation for %pM\n",
+ entry.mac);
+ }
+
+ if (val & MV88E6XXX_G1_ATU_OP_MEMBER_VIOLATION) {
+ dev_err_ratelimited(chip->dev,
+ "ATU member violation for %pM portvec %x\n",
+ entry.mac, entry.portvec);
+ }
+
+ if (val & MV88E6XXX_G1_ATU_OP_MEMBER_VIOLATION)
+ dev_err_ratelimited(chip->dev,
+ "ATU miss violation for %pM portvec %x\n",
+ entry.mac, entry.portvec);
+
+ if (val & MV88E6XXX_G1_ATU_OP_FULL_VIOLATION)
+ dev_err_ratelimited(chip->dev,
+ "ATU full violation for %pM portvec %x\n",
+ entry.mac, entry.portvec);
+
+ return IRQ_HANDLED;
+
+out:
+ mutex_unlock(&chip->reg_lock);
+
+ dev_err(chip->dev, "ATU problem: error %d while handling interrupt\n",
+ err);
+ return IRQ_HANDLED;
+}
+
+int mv88e6xxx_g1_atu_prob_irq_setup(struct mv88e6xxx_chip *chip)
+{
+ int err;
+
+ chip->atu_prob_irq = irq_find_mapping(chip->g1_irq.domain,
+ MV88E6XXX_G1_STS_IRQ_ATU_PROB);
+ if (chip->atu_prob_irq < 0)
+ return chip->device_irq;
+
+ err = request_threaded_irq(chip->atu_prob_irq, NULL,
+ mv88e6xxx_g1_atu_prob_irq_thread_fn,
+ IRQF_ONESHOT, "mv88e6xxx-g1-atu-prob",
+ chip);
+ if (err)
+ irq_dispose_mapping(chip->atu_prob_irq);
+
+ return err;
+}
+
+void mv88e6xxx_g1_atu_prob_irq_free(struct mv88e6xxx_chip *chip)
+{
+ free_irq(chip->atu_prob_irq, chip);
+ irq_dispose_mapping(chip->atu_prob_irq);
+}
--
2.15.1
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