diff options
author | Andrew Lunn <andrew@lunn.ch> | 2018-01-14 02:32:44 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2018-01-14 12:08:45 -0500 |
commit | 0977644c5005ca2d186b353d7236deca6aa2933e (patch) | |
tree | c7eb19159c66f71e31e8faf618c97b16c545e931 /drivers/net/dsa/mv88e6xxx/global1_atu.c | |
parent | mlxsw: spectrum_router: Add support for IPv6 non-equal-cost multipath (diff) | |
download | linux-dev-0977644c5005ca2d186b353d7236deca6aa2933e.tar.xz linux-dev-0977644c5005ca2d186b353d7236deca6aa2933e.zip |
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>
Diffstat (limited to '')
-rw-r--r-- | drivers/net/dsa/mv88e6xxx/global1_atu.c | 87 |
1 files changed, 87 insertions, 0 deletions
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); +} |