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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@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2018-01-14 02:32:44 +01:00 committed by David S. Miller
parent 3743d88ab4
commit 0977644c50
4 changed files with 103 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/dsa/mv88e6xxx/chip.c
View File

@ -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);

1
drivers/net/dsa/mv88e6xxx/chip.h
View File

@ -207,6 +207,7 @@ struct mv88e6xxx_chip {
int irq;
int device_irq;
int watchdog_irq;
int atu_prob_irq;
};
struct mv88e6xxx_bus_ops {

8
drivers/net/dsa/mv88e6xxx/global1.h
View File

@ -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);

87
drivers/net/dsa/mv88e6xxx/global1_atu.c
View File

@ -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);
}