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Miller" , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Roopa Prabhu , Nikolay Aleksandrov , Simon Horman Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bridge@lists.linux.dev, Elliot Ayrey Subject: [RFC net-next (resend) 3/4] net: dsa: mv88e6xxx: handle member-violations Date: Fri, 8 Nov 2024 16:55:45 +1300 Message-ID: <20241108035546.2055996-4-elliot.ayrey@alliedtelesis.co.nz> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241108035546.2055996-1-elliot.ayrey@alliedtelesis.co.nz> References: <20241108035546.2055996-1-elliot.ayrey@alliedtelesis.co.nz> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SEG-SpamProfiler-Analysis: v=2.4 cv=ca1xrWDM c=1 sm=1 tr=0 ts=672d8bc6 a=KLBiSEs5mFS1a/PbTCJxuA==:117 a=VlfZXiiP6vEA:10 a=8i6-b8GgAAAA:8 a=WYMWzFLixRnFLzZ6b-kA:9 a=3ZKOabzyN94A:10 a=XAGLwFu5sp1jj7jejlXE:22 X-SEG-SpamProfiler-Score: 0 x-atlnz-ls: pat Content-Type: text/plain; charset="utf-8" Add a handler for servicing member-violations to the mv88e6xxx switch driver. When we receive a member-violation from the hardware first check the ATU for the corresponding entry and only service the interrupt if the ATU entry has a non-zero DPV and the new port that raised the interrupt is not in the DPV. Servicing this interrupt will send a switchdev notification for the new port. Signed-off-by: Elliot Ayrey --- drivers/net/dsa/mv88e6xxx/global1_atu.c | 38 +++++++++++++++++++++++++ drivers/net/dsa/mv88e6xxx/switchdev.c | 33 ++++++++++++++++++++- drivers/net/dsa/mv88e6xxx/switchdev.h | 2 ++ 3 files changed, 72 insertions(+), 1 deletion(-) diff --git a/drivers/net/dsa/mv88e6xxx/global1_atu.c b/drivers/net/dsa/mv88= e6xxx/global1_atu.c index c47f068f56b3..5c5c53cb2ad0 100644 --- a/drivers/net/dsa/mv88e6xxx/global1_atu.c +++ b/drivers/net/dsa/mv88e6xxx/global1_atu.c @@ -399,12 +399,36 @@ int mv88e6xxx_g1_atu_remove(struct mv88e6xxx_chip *ch= ip, u16 fid, int port, return mv88e6xxx_g1_atu_move(chip, fid, from_port, to_port, all); } =20 +static int mv88e6xxx_g1_atu_entry_check(struct mv88e6xxx_chip *chip, u16 f= id, u8 mac[ETH_ALEN], + bool *in_atu, u16 *dpv) +{ + struct mv88e6xxx_atu_entry entry; + int err; + + entry.state =3D 0; + ether_addr_copy(entry.mac, mac); + eth_addr_dec(entry.mac); + + mv88e6xxx_reg_lock(chip); + err =3D mv88e6xxx_g1_atu_getnext(chip, fid, &entry); + mv88e6xxx_reg_unlock(chip); + if (err) + return err; + + *in_atu =3D ether_addr_equal(entry.mac, mac); + if (dpv) + *dpv =3D entry.portvec; + + return err; +} + static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn(int irq, void *dev_= id) { struct mv88e6xxx_chip *chip =3D dev_id; struct mv88e6xxx_atu_entry entry; int err, spid; u16 val, fid; + bool in_atu =3D false; =20 mv88e6xxx_reg_lock(chip); =20 @@ -437,6 +461,20 @@ static irqreturn_t mv88e6xxx_g1_atu_prob_irq_thread_fn= (int irq, void *dev_id) entry.portvec, entry.mac, fid); chip->ports[spid].atu_member_violation++; + + if (fid !=3D MV88E6XXX_FID_STANDALONE && chip->ports[spid].mab) { + u16 dpv =3D 0; + + err =3D mv88e6xxx_g1_atu_entry_check(chip, fid, entry.mac, &in_atu, &dp= v); + if (err) + goto out; + + if (in_atu && dpv !=3D 0 && !(dpv & BIT(spid))) { + err =3D mv88e6xxx_handle_member_violation(chip, spid, &entry, fid); + if (err) + goto out; + } + } } =20 if (val & MV88E6XXX_G1_ATU_OP_MISS_VIOLATION) { diff --git a/drivers/net/dsa/mv88e6xxx/switchdev.c b/drivers/net/dsa/mv88e6= xxx/switchdev.c index 4c346a884fb2..88761677ff10 100644 --- a/drivers/net/dsa/mv88e6xxx/switchdev.c +++ b/drivers/net/dsa/mv88e6xxx/switchdev.c @@ -79,5 +79,36 @@ int mv88e6xxx_handle_miss_violation(struct mv88e6xxx_chi= p *chip, int port, brport, &info.info, NULL); rtnl_unlock(); =20 - return err; + return notifier_to_errno(err); +} + +int mv88e6xxx_handle_member_violation(struct mv88e6xxx_chip *chip, int por= t, + struct mv88e6xxx_atu_entry *entry, u16 fid) +{ + struct switchdev_notifier_fdb_info info =3D { + .addr =3D entry->mac, + }; + struct net_device *brport; + struct dsa_port *dp; + u16 vid; + int err; + + err =3D mv88e6xxx_find_vid(chip, fid, &vid); + if (err) + return err; + + info.vid =3D vid; + dp =3D dsa_to_port(chip->ds, port); + + rtnl_lock(); + brport =3D dsa_port_to_bridge_port(dp); + if (!brport) { + rtnl_unlock(); + return -ENODEV; + } + err =3D call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE, + brport, &info.info, NULL); + rtnl_unlock(); + + return notifier_to_errno(err); } diff --git a/drivers/net/dsa/mv88e6xxx/switchdev.h b/drivers/net/dsa/mv88e6= xxx/switchdev.h index 62214f9d62b0..f718dbfaf45d 100644 --- a/drivers/net/dsa/mv88e6xxx/switchdev.h +++ b/drivers/net/dsa/mv88e6xxx/switchdev.h @@ -15,5 +15,7 @@ int mv88e6xxx_handle_miss_violation(struct mv88e6xxx_chip *chip, int port, struct mv88e6xxx_atu_entry *entry, u16 fid); +int mv88e6xxx_handle_member_violation(struct mv88e6xxx_chip *chip, int por= t, + struct mv88e6xxx_atu_entry *entry, u16 fid); =20 #endif /* _MV88E6XXX_SWITCHDEV_H_ */