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kernel: backport some mv88e6xxx devlink patches

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This should help debug mv88e6xxx issues

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
This commit is contained in:
Etienne Champetier 2023-01-30 23:43:00 +02:00
parent 83a13b74f5
commit 428d720c7f
3 changed files with 374 additions and 0 deletions
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191
target/linux/generic/backport-5.10/890-v5.11-net-dsa-mv88e6xxx-Export-VTU-as-devlink-region.patch Normal file
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@ -0,0 +1,191 @@
From ca4d632aef031c7946c42a6eb873d24ab6474f17 Mon Sep 17 00:00:00 2001
From: Tobias Waldekranz <tobias@waldekranz.com>
Date: Mon, 9 Nov 2020 09:29:27 +0100
Subject: [PATCH] net: dsa: mv88e6xxx: Export VTU as devlink region
Export the raw VTU data and related registers in a devlink region so
that it can be inspected from userspace and compared to the current
bridge configuration.
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20201109082927.8684-1-tobias@waldekranz.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/dsa/mv88e6xxx/chip.h | 1 +
drivers/net/dsa/mv88e6xxx/devlink.c | 105 +++++++++++++++++++++++-
drivers/net/dsa/mv88e6xxx/global1.h | 2 +
drivers/net/dsa/mv88e6xxx/global1_vtu.c | 4 +-
4 files changed, 109 insertions(+), 3 deletions(-)
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -246,6 +246,7 @@ enum mv88e6xxx_region_id {
MV88E6XXX_REGION_GLOBAL1 = 0,
MV88E6XXX_REGION_GLOBAL2,
MV88E6XXX_REGION_ATU,
+ MV88E6XXX_REGION_VTU,
_MV88E6XXX_REGION_MAX,
};
--- a/drivers/net/dsa/mv88e6xxx/devlink.c
+++ b/drivers/net/dsa/mv88e6xxx/devlink.c
@@ -417,6 +417,92 @@ out:
return err;
}
+/**
+ * struct mv88e6xxx_devlink_vtu_entry - Devlink VTU entry
+ * @fid: Global1/2: FID and VLAN policy.
+ * @sid: Global1/3: SID, unknown filters and learning.
+ * @op: Global1/5: FID (old chipsets).
+ * @vid: Global1/6: VID, valid, and page.
+ * @data: Global1/7-9: Membership data and priority override.
+ * @resvd: Reserved. Also happens to align the size to 16B.
+ *
+ * The VTU entry format varies between chipset generations, the
+ * descriptions above represent the superset of all possible
+ * information, not all fields are valid on all devices. Since this is
+ * a low-level debug interface, copy all data verbatim and defer
+ * parsing to the consumer.
+ */
+struct mv88e6xxx_devlink_vtu_entry {
+ u16 fid;
+ u16 sid;
+ u16 op;
+ u16 vid;
+ u16 data[3];
+ u16 resvd;
+};
+
+static int mv88e6xxx_region_vtu_snapshot(struct devlink *dl,
+ const struct devlink_region_ops *ops,
+ struct netlink_ext_ack *extack,
+ u8 **data)
+{
+ struct mv88e6xxx_devlink_vtu_entry *table, *entry;
+ struct dsa_switch *ds = dsa_devlink_to_ds(dl);
+ struct mv88e6xxx_chip *chip = ds->priv;
+ struct mv88e6xxx_vtu_entry vlan;
+ int err;
+
+ table = kcalloc(chip->info->max_vid + 1,
+ sizeof(struct mv88e6xxx_devlink_vtu_entry),
+ GFP_KERNEL);
+ if (!table)
+ return -ENOMEM;
+
+ entry = table;
+ vlan.vid = chip->info->max_vid;
+ vlan.valid = false;
+
+ mv88e6xxx_reg_lock(chip);
+
+ do {
+ err = mv88e6xxx_g1_vtu_getnext(chip, &vlan);
+ if (err)
+ break;
+
+ if (!vlan.valid)
+ break;
+
+ err = err ? : mv88e6xxx_g1_read(chip, MV88E6352_G1_VTU_FID,
+ &entry->fid);
+ err = err ? : mv88e6xxx_g1_read(chip, MV88E6352_G1_VTU_SID,
+ &entry->sid);
+ err = err ? : mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_OP,
+ &entry->op);
+ err = err ? : mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_VID,
+ &entry->vid);
+ err = err ? : mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_DATA1,
+ &entry->data[0]);
+ err = err ? : mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_DATA2,
+ &entry->data[1]);
+ err = err ? : mv88e6xxx_g1_read(chip, MV88E6XXX_G1_VTU_DATA3,
+ &entry->data[2]);
+ if (err)
+ break;
+
+ entry++;
+ } while (vlan.vid < chip->info->max_vid);
+
+ mv88e6xxx_reg_unlock(chip);
+
+ if (err) {
+ kfree(table);
+ return err;
+ }
+
+ *data = (u8 *)table;
+ return 0;
+}
+
static int mv88e6xxx_region_port_snapshot(struct devlink_port *devlink_port,
const struct devlink_port_region_ops *ops,
struct netlink_ext_ack *extack,
@@ -475,6 +561,12 @@ static struct devlink_region_ops mv88e6x
.destructor = kfree,
};
+static struct devlink_region_ops mv88e6xxx_region_vtu_ops = {
+ .name = "vtu",
+ .snapshot = mv88e6xxx_region_vtu_snapshot,
+ .destructor = kfree,
+};
+
static const struct devlink_port_region_ops mv88e6xxx_region_port_ops = {
.name = "port",
.snapshot = mv88e6xxx_region_port_snapshot,
@@ -498,6 +590,10 @@ static struct mv88e6xxx_region mv88e6xxx
.ops = &mv88e6xxx_region_atu_ops
/* calculated at runtime */
},
+ [MV88E6XXX_REGION_VTU] = {
+ .ops = &mv88e6xxx_region_vtu_ops
+ /* calculated at runtime */
+ },
};
static void
@@ -576,9 +672,16 @@ static int mv88e6xxx_setup_devlink_regio
ops = mv88e6xxx_regions[i].ops;
size = mv88e6xxx_regions[i].size;
- if (i == MV88E6XXX_REGION_ATU)
+ switch (i) {
+ case MV88E6XXX_REGION_ATU:
size = mv88e6xxx_num_databases(chip) *
sizeof(struct mv88e6xxx_devlink_atu_entry);
+ break;
+ case MV88E6XXX_REGION_VTU:
+ size = chip->info->max_vid *
+ sizeof(struct mv88e6xxx_devlink_vtu_entry);
+ break;
+ }
region = dsa_devlink_region_create(ds, ops, 1, size);
if (IS_ERR(region))
--- a/drivers/net/dsa/mv88e6xxx/global1.h
+++ b/drivers/net/dsa/mv88e6xxx/global1.h
@@ -330,6 +330,8 @@ void mv88e6xxx_g1_atu_prob_irq_free(stru
int mv88e6165_g1_atu_get_hash(struct mv88e6xxx_chip *chip, u8 *hash);
int mv88e6165_g1_atu_set_hash(struct mv88e6xxx_chip *chip, u8 hash);
+int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
+ struct mv88e6xxx_vtu_entry *entry);
int mv88e6185_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
struct mv88e6xxx_vtu_entry *entry);
int mv88e6185_g1_vtu_loadpurge(struct mv88e6xxx_chip *chip,
--- a/drivers/net/dsa/mv88e6xxx/global1_vtu.c
+++ b/drivers/net/dsa/mv88e6xxx/global1_vtu.c
@@ -307,8 +307,8 @@ static int mv88e6xxx_g1_vtu_stu_get(stru
return 0;
}
-static int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
- struct mv88e6xxx_vtu_entry *entry)
+int mv88e6xxx_g1_vtu_getnext(struct mv88e6xxx_chip *chip,
+ struct mv88e6xxx_vtu_entry *entry)
{
int err;

153
target/linux/generic/backport-5.10/891-v5.11-net-dsa-mv88e6xxx-Add-helper-to-get-a-chip-s-max_vid.patch Normal file
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From e545f86573937142b8a90bd65d476b9f001088cf Mon Sep 17 00:00:00 2001
From: Tobias Waldekranz <tobias@waldekranz.com>
Date: Tue, 10 Nov 2020 19:57:20 +0100
Subject: [PATCH] net: dsa: mv88e6xxx: Add helper to get a chip's max_vid
Most of the other chip info constants have helpers to get at them; add
one for max_vid to keep things consistent.
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20201110185720.18228-1-tobias@waldekranz.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/dsa/mv88e6xxx/chip.c | 18 +++++++++---------
drivers/net/dsa/mv88e6xxx/chip.h | 5 +++++
drivers/net/dsa/mv88e6xxx/devlink.c | 8 ++++----
3 files changed, 18 insertions(+), 13 deletions(-)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1455,7 +1455,7 @@ static void mv88e6xxx_port_fast_age(stru
static int mv88e6xxx_vtu_setup(struct mv88e6xxx_chip *chip)
{
- if (!chip->info->max_vid)
+ if (!mv88e6xxx_max_vid(chip))
return 0;
return mv88e6xxx_g1_vtu_flush(chip);
@@ -1497,7 +1497,7 @@ int mv88e6xxx_fid_map(struct mv88e6xxx_c
}
/* Set every FID bit used by the VLAN entries */
- vlan.vid = chip->info->max_vid;
+ vlan.vid = mv88e6xxx_max_vid(chip);
vlan.valid = false;
do {
@@ -1509,7 +1509,7 @@ int mv88e6xxx_fid_map(struct mv88e6xxx_c
break;
set_bit(vlan.fid, fid_bitmap);
- } while (vlan.vid < chip->info->max_vid);
+ } while (vlan.vid < mv88e6xxx_max_vid(chip));
return 0;
}
@@ -1600,7 +1600,7 @@ static int mv88e6xxx_port_vlan_filtering
int err;
if (switchdev_trans_ph_prepare(trans))
- return chip->info->max_vid ? 0 : -EOPNOTSUPP;
+ return mv88e6xxx_max_vid(chip) ? 0 : -EOPNOTSUPP;
mv88e6xxx_reg_lock(chip);
err = mv88e6xxx_port_set_8021q_mode(chip, port, mode);
@@ -1616,7 +1616,7 @@ mv88e6xxx_port_vlan_prepare(struct dsa_s
struct mv88e6xxx_chip *chip = ds->priv;
int err;
- if (!chip->info->max_vid)
+ if (!mv88e6xxx_max_vid(chip))
return -EOPNOTSUPP;
/* If the requested port doesn't belong to the same bridge as the VLAN
@@ -1990,7 +1990,7 @@ static void mv88e6xxx_port_vlan_add(stru
u8 member;
u16 vid;
- if (!chip->info->max_vid)
+ if (!mv88e6xxx_max_vid(chip))
return;
if (dsa_is_dsa_port(ds, port) || dsa_is_cpu_port(ds, port))
@@ -2068,7 +2068,7 @@ static int mv88e6xxx_port_vlan_del(struc
u16 pvid, vid;
int err = 0;
- if (!chip->info->max_vid)
+ if (!mv88e6xxx_max_vid(chip))
return -EOPNOTSUPP;
mv88e6xxx_reg_lock(chip);
@@ -2174,7 +2174,7 @@ static int mv88e6xxx_port_db_dump(struct
return err;
/* Dump VLANs' Filtering Information Databases */
- vlan.vid = chip->info->max_vid;
+ vlan.vid = mv88e6xxx_max_vid(chip);
vlan.valid = false;
do {
@@ -2189,7 +2189,7 @@ static int mv88e6xxx_port_db_dump(struct
cb, data);
if (err)
return err;
- } while (vlan.vid < chip->info->max_vid);
+ } while (vlan.vid < mv88e6xxx_max_vid(chip));
return err;
}
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -674,6 +674,11 @@ static inline unsigned int mv88e6xxx_num
return chip->info->num_ports;
}
+static inline unsigned int mv88e6xxx_max_vid(struct mv88e6xxx_chip *chip)
+{
+ return chip->info->max_vid;
+}
+
static inline u16 mv88e6xxx_port_mask(struct mv88e6xxx_chip *chip)
{
return GENMASK((s32)mv88e6xxx_num_ports(chip) - 1, 0);
--- a/drivers/net/dsa/mv88e6xxx/devlink.c
+++ b/drivers/net/dsa/mv88e6xxx/devlink.c
@@ -452,14 +452,14 @@ static int mv88e6xxx_region_vtu_snapshot
struct mv88e6xxx_vtu_entry vlan;
int err;
- table = kcalloc(chip->info->max_vid + 1,
+ table = kcalloc(mv88e6xxx_max_vid(chip) + 1,
sizeof(struct mv88e6xxx_devlink_vtu_entry),
GFP_KERNEL);
if (!table)
return -ENOMEM;
entry = table;
- vlan.vid = chip->info->max_vid;
+ vlan.vid = mv88e6xxx_max_vid(chip);
vlan.valid = false;
mv88e6xxx_reg_lock(chip);
@@ -490,7 +490,7 @@ static int mv88e6xxx_region_vtu_snapshot
break;
entry++;
- } while (vlan.vid < chip->info->max_vid);
+ } while (vlan.vid < mv88e6xxx_max_vid(chip));
mv88e6xxx_reg_unlock(chip);
@@ -678,7 +678,7 @@ static int mv88e6xxx_setup_devlink_regio
sizeof(struct mv88e6xxx_devlink_atu_entry);
break;
case MV88E6XXX_REGION_VTU:
- size = chip->info->max_vid *
+ size = mv88e6xxx_max_vid(chip) *
sizeof(struct mv88e6xxx_devlink_vtu_entry);
break;
}

30
target/linux/generic/backport-5.10/891-v5.13-net-dsa-mv88e6xxx-Fix-off-by-one-in-VTU-devlink-regi.patch Normal file
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@ -0,0 +1,30 @@
From 281140a0a2ce4febf2c0ce5d29d0e7d961a826b1 Mon Sep 17 00:00:00 2001
From: Tobias Waldekranz <tobias@waldekranz.com>
Date: Wed, 21 Apr 2021 14:04:53 +0200
Subject: [PATCH] net: dsa: mv88e6xxx: Fix off-by-one in VTU devlink region
size
In the unlikely event of the VTU being loaded to the brim with 4k
entries, the last one was placed in the buffer, but the size reported
to devlink was off-by-one. Make sure that the final entry is available
to the caller.
Fixes: ca4d632aef03 ("net: dsa: mv88e6xxx: Export VTU as devlink region")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/dsa/mv88e6xxx/devlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/dsa/mv88e6xxx/devlink.c
+++ b/drivers/net/dsa/mv88e6xxx/devlink.c
@@ -678,7 +678,7 @@ static int mv88e6xxx_setup_devlink_regio
sizeof(struct mv88e6xxx_devlink_atu_entry);
break;
case MV88E6XXX_REGION_VTU:
- size = mv88e6xxx_max_vid(chip) *
+ size = (mv88e6xxx_max_vid(chip) + 1) *
sizeof(struct mv88e6xxx_devlink_vtu_entry);
break;
}