[PATCH net-next v2 0/4] net: dsa: hellcreek: Add support for dumping tables

[PATCH net-next v2 0/4] net: dsa: hellcreek: Add support for dumping tables

[Kurt Kanzenbach]

Hi,

add support for dumping the VLAN and FDB table via devlink. As the driver uses
internal VLANs and static FDB entries, this is a useful debugging feature.

Changes since v1:

 * Drop memory reporting as there are better APIs to expose this
 * Move comment to VLAN patch

Previous versions:

 * https://lkml.kernel.org/netdev/20210311175344.3084-1-kurt@kmk-computers.de/

Thanks,
Kurt

Kurt Kanzenbach (4):
  net: dsa: hellcreek: Add devlink VLAN region
  net: dsa: hellcreek: Use boolean value
  net: dsa: hellcreek: Move common code to helper
  net: dsa: hellcreek: Add devlink FDB region

 drivers/net/dsa/hirschmann/hellcreek.c | 223 ++++++++++++++++++++-----
 drivers/net/dsa/hirschmann/hellcreek.h |   7 +
 2 files changed, 187 insertions(+), 43 deletions(-)

-- 
2.30.2

[PATCH net-next v2 1/4] net: dsa: hellcreek: Add devlink VLAN region

[Kurt Kanzenbach]

Allow to dump the VLAN table via devlink. This especially useful, because the
driver internally leverages VLANs for the port separation. These are not visible
via the bridge utility.

Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
---
 drivers/net/dsa/hirschmann/hellcreek.c | 74 ++++++++++++++++++++++++++
 drivers/net/dsa/hirschmann/hellcreek.h |  6 +++
 2 files changed, 80 insertions(+)

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index 463137c39db2..4a14760e2680 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -1082,6 +1082,67 @@ static int hellcreek_setup_devlink_resources(struct dsa_switch *ds)
 	return err;
 }
 
+static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl,
+						  const struct devlink_region_ops *ops,
+						  struct netlink_ext_ack *extack,
+						  u8 **data)
+{
+	struct hellcreek_devlink_vlan_entry *table, *entry;
+	struct dsa_switch *ds = dsa_devlink_to_ds(dl);
+	struct hellcreek *hellcreek = ds->priv;
+	int i;
+
+	table = kcalloc(VLAN_N_VID, sizeof(*entry), GFP_KERNEL);
+	if (!table)
+		return -ENOMEM;
+
+	entry = table;
+
+	mutex_lock(&hellcreek->reg_lock);
+	for (i = 0; i < VLAN_N_VID; ++i, ++entry) {
+		entry->member = hellcreek->vidmbrcfg[i];
+		entry->vid    = i;
+	}
+	mutex_unlock(&hellcreek->reg_lock);
+
+	*data = (u8 *)table;
+
+	return 0;
+}
+
+static struct devlink_region_ops hellcreek_region_vlan_ops = {
+	.name	    = "vlan",
+	.snapshot   = hellcreek_devlink_region_vlan_snapshot,
+	.destructor = kfree,
+};
+
+static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
+{
+	struct hellcreek *hellcreek = ds->priv;
+	struct devlink_region_ops *ops;
+	struct devlink_region *region;
+	u64 size;
+
+	/* VLAN table */
+	size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry);
+	ops  = &hellcreek_region_vlan_ops;
+
+	region = dsa_devlink_region_create(ds, ops, 1, size);
+	if (IS_ERR(region))
+		return PTR_ERR(region);
+
+	hellcreek->vlan_region = region;
+
+	return 0;
+}
+
+static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds)
+{
+	struct hellcreek *hellcreek = ds->priv;
+
+	dsa_devlink_region_destroy(hellcreek->vlan_region);
+}
+
 static int hellcreek_setup(struct dsa_switch *ds)
 {
 	struct hellcreek *hellcreek = ds->priv;
@@ -1143,11 +1204,24 @@ static int hellcreek_setup(struct dsa_switch *ds)
 		return ret;
 	}
 
+	ret = hellcreek_setup_devlink_regions(ds);
+	if (ret) {
+		dev_err(hellcreek->dev,
+			"Failed to setup devlink regions!\n");
+		goto err_regions;
+	}
+
 	return 0;
+
+err_regions:
+	dsa_devlink_resources_unregister(ds);
+
+	return ret;
 }
 
 static void hellcreek_teardown(struct dsa_switch *ds)
 {
+	hellcreek_teardown_devlink_regions(ds);
 	dsa_devlink_resources_unregister(ds);
 }
 
diff --git a/drivers/net/dsa/hirschmann/hellcreek.h b/drivers/net/dsa/hirschmann/hellcreek.h
index 305e76dab34d..42339f9359d9 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.h
+++ b/drivers/net/dsa/hirschmann/hellcreek.h
@@ -278,6 +278,7 @@ struct hellcreek {
 	struct mutex reg_lock;	/* Switch IP register lock */
 	struct mutex vlan_lock;	/* VLAN bitmaps lock */
 	struct mutex ptp_lock;	/* PTP IP register lock */
+	struct devlink_region *vlan_region;
 	void __iomem *base;
 	void __iomem *ptp_base;
 	u16 swcfg;		/* swcfg shadow */
@@ -304,4 +305,9 @@ enum hellcreek_devlink_resource_id {
 	HELLCREEK_DEVLINK_PARAM_ID_FDB_TABLE,
 };
 
+struct hellcreek_devlink_vlan_entry {
+	u16 vid;
+	u16 member;
+};
+
 #endif /* _HELLCREEK_H_ */
-- 
2.30.2

Re: [PATCH net-next v2 1/4] net: dsa: hellcreek: Add devlink VLAN region

[Vladimir Oltean]

On Sat, Mar 13, 2021 at 10:39:36AM +0100, Kurt Kanzenbach wrote:
> Allow to dump the VLAN table via devlink. This especially useful, because the
> driver internally leverages VLANs for the port separation. These are not visible
> via the bridge utility.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
> ---

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

Re: [PATCH net-next v2 1/4] net: dsa: hellcreek: Add devlink VLAN region

[Florian Fainelli]

On 3/13/2021 1:39 AM, Kurt Kanzenbach wrote:
> Allow to dump the VLAN table via devlink. This especially useful, because the
> driver internally leverages VLANs for the port separation. These are not visible
> via the bridge utility.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

[PATCH net-next v2 2/4] net: dsa: hellcreek: Use boolean value

[Kurt Kanzenbach]

hellcreek_select_vlan() takes a boolean instead of an integer.
So, use false accordingly.

Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/dsa/hirschmann/hellcreek.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index 4a14760e2680..edac39462a07 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -433,7 +433,7 @@ static void hellcreek_unapply_vlan(struct hellcreek *hellcreek, int port,
 
 	mutex_lock(&hellcreek->reg_lock);
 
-	hellcreek_select_vlan(hellcreek, vid, 0);
+	hellcreek_select_vlan(hellcreek, vid, false);
 
 	/* Setup port vlan membership */
 	hellcreek_select_vlan_params(hellcreek, port, &shift, &mask);
-- 
2.30.2

Re: [PATCH net-next v2 2/4] net: dsa: hellcreek: Use boolean value

[Vladimir Oltean]

On Sat, Mar 13, 2021 at 10:39:37AM +0100, Kurt Kanzenbach wrote:
> hellcreek_select_vlan() takes a boolean instead of an integer.
> So, use false accordingly.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> ---

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

Re: [PATCH net-next v2 2/4] net: dsa: hellcreek: Use boolean value

[Florian Fainelli]

On 3/13/2021 1:39 AM, Kurt Kanzenbach wrote:
> hellcreek_select_vlan() takes a boolean instead of an integer.
> So, use false accordingly.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

[PATCH net-next v2 3/4] net: dsa: hellcreek: Move common code to helper

[Kurt Kanzenbach]

There are two functions which need to populate fdb entries. Move that to a
helper function.

Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/dsa/hirschmann/hellcreek.c | 85 +++++++++++++-------------
 1 file changed, 43 insertions(+), 42 deletions(-)

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index edac39462a07..38ff0f12e8a4 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -670,6 +670,40 @@ static int __hellcreek_fdb_del(struct hellcreek *hellcreek,
 	return hellcreek_wait_fdb_ready(hellcreek);
 }
 
+static void hellcreek_populate_fdb_entry(struct hellcreek *hellcreek,
+					 struct hellcreek_fdb_entry *entry,
+					 size_t idx)
+{
+	unsigned char addr[ETH_ALEN];
+	u16 meta, mac;
+
+	/* Read values */
+	meta	= hellcreek_read(hellcreek, HR_FDBMDRD);
+	mac	= hellcreek_read(hellcreek, HR_FDBRDL);
+	addr[5] = mac & 0xff;
+	addr[4] = (mac & 0xff00) >> 8;
+	mac	= hellcreek_read(hellcreek, HR_FDBRDM);
+	addr[3] = mac & 0xff;
+	addr[2] = (mac & 0xff00) >> 8;
+	mac	= hellcreek_read(hellcreek, HR_FDBRDH);
+	addr[1] = mac & 0xff;
+	addr[0] = (mac & 0xff00) >> 8;
+
+	/* Populate @entry */
+	memcpy(entry->mac, addr, sizeof(addr));
+	entry->idx	    = idx;
+	entry->portmask	    = (meta & HR_FDBMDRD_PORTMASK_MASK) >>
+		HR_FDBMDRD_PORTMASK_SHIFT;
+	entry->age	    = (meta & HR_FDBMDRD_AGE_MASK) >>
+		HR_FDBMDRD_AGE_SHIFT;
+	entry->is_obt	    = !!(meta & HR_FDBMDRD_OBT);
+	entry->pass_blocked = !!(meta & HR_FDBMDRD_PASS_BLOCKED);
+	entry->is_static    = !!(meta & HR_FDBMDRD_STATIC);
+	entry->reprio_tc    = (meta & HR_FDBMDRD_REPRIO_TC_MASK) >>
+		HR_FDBMDRD_REPRIO_TC_SHIFT;
+	entry->reprio_en    = !!(meta & HR_FDBMDRD_REPRIO_EN);
+}
+
 /* Retrieve the index of a FDB entry by mac address. Currently we search through
  * the complete table in hardware. If that's too slow, we might have to cache
  * the complete FDB table in software.
@@ -691,39 +725,19 @@ static int hellcreek_fdb_get(struct hellcreek *hellcreek,
 	 * enter new entries anywhere.
 	 */
 	for (i = 0; i < hellcreek->fdb_entries; ++i) {
-		unsigned char addr[ETH_ALEN];
-		u16 meta, mac;
-
-		meta	= hellcreek_read(hellcreek, HR_FDBMDRD);
-		mac	= hellcreek_read(hellcreek, HR_FDBRDL);
-		addr[5] = mac & 0xff;
-		addr[4] = (mac & 0xff00) >> 8;
-		mac	= hellcreek_read(hellcreek, HR_FDBRDM);
-		addr[3] = mac & 0xff;
-		addr[2] = (mac & 0xff00) >> 8;
-		mac	= hellcreek_read(hellcreek, HR_FDBRDH);
-		addr[1] = mac & 0xff;
-		addr[0] = (mac & 0xff00) >> 8;
+		struct hellcreek_fdb_entry tmp = { 0 };
+
+		/* Read entry */
+		hellcreek_populate_fdb_entry(hellcreek, &tmp, i);
 
 		/* Force next entry */
 		hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
 
-		if (memcmp(addr, dest, ETH_ALEN))
+		if (memcmp(tmp.mac, dest, ETH_ALEN))
 			continue;
 
 		/* Match found */
-		entry->idx	    = i;
-		entry->portmask	    = (meta & HR_FDBMDRD_PORTMASK_MASK) >>
-			HR_FDBMDRD_PORTMASK_SHIFT;
-		entry->age	    = (meta & HR_FDBMDRD_AGE_MASK) >>
-			HR_FDBMDRD_AGE_SHIFT;
-		entry->is_obt	    = !!(meta & HR_FDBMDRD_OBT);
-		entry->pass_blocked = !!(meta & HR_FDBMDRD_PASS_BLOCKED);
-		entry->is_static    = !!(meta & HR_FDBMDRD_STATIC);
-		entry->reprio_tc    = (meta & HR_FDBMDRD_REPRIO_TC_MASK) >>
-			HR_FDBMDRD_REPRIO_TC_SHIFT;
-		entry->reprio_en    = !!(meta & HR_FDBMDRD_REPRIO_EN);
-		memcpy(entry->mac, addr, sizeof(addr));
+		memcpy(entry, &tmp, sizeof(*entry));
 
 		return 0;
 	}
@@ -838,18 +852,9 @@ static int hellcreek_fdb_dump(struct dsa_switch *ds, int port,
 	for (i = 0; i < hellcreek->fdb_entries; ++i) {
 		unsigned char null_addr[ETH_ALEN] = { 0 };
 		struct hellcreek_fdb_entry entry = { 0 };
-		u16 meta, mac;
-
-		meta	= hellcreek_read(hellcreek, HR_FDBMDRD);
-		mac	= hellcreek_read(hellcreek, HR_FDBRDL);
-		entry.mac[5] = mac & 0xff;
-		entry.mac[4] = (mac & 0xff00) >> 8;
-		mac	= hellcreek_read(hellcreek, HR_FDBRDM);
-		entry.mac[3] = mac & 0xff;
-		entry.mac[2] = (mac & 0xff00) >> 8;
-		mac	= hellcreek_read(hellcreek, HR_FDBRDH);
-		entry.mac[1] = mac & 0xff;
-		entry.mac[0] = (mac & 0xff00) >> 8;
+
+		/* Read entry */
+		hellcreek_populate_fdb_entry(hellcreek, &entry, i);
 
 		/* Force next entry */
 		hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
@@ -858,10 +863,6 @@ static int hellcreek_fdb_dump(struct dsa_switch *ds, int port,
 		if (!memcmp(entry.mac, null_addr, ETH_ALEN))
 			continue;
 
-		entry.portmask	= (meta & HR_FDBMDRD_PORTMASK_MASK) >>
-			HR_FDBMDRD_PORTMASK_SHIFT;
-		entry.is_static	= !!(meta & HR_FDBMDRD_STATIC);
-
 		/* Check port mask */
 		if (!(entry.portmask & BIT(port)))
 			continue;
-- 
2.30.2

Re: [PATCH net-next v2 3/4] net: dsa: hellcreek: Move common code to helper

[Vladimir Oltean]

On Sat, Mar 13, 2021 at 10:39:38AM +0100, Kurt Kanzenbach wrote:
> There are two functions which need to populate fdb entries. Move that to a
> helper function.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> ---
>  drivers/net/dsa/hirschmann/hellcreek.c | 85 +++++++++++++-------------
>  1 file changed, 43 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
> index edac39462a07..38ff0f12e8a4 100644
> --- a/drivers/net/dsa/hirschmann/hellcreek.c
> +++ b/drivers/net/dsa/hirschmann/hellcreek.c
> @@ -670,6 +670,40 @@ static int __hellcreek_fdb_del(struct hellcreek *hellcreek,
>  	return hellcreek_wait_fdb_ready(hellcreek);
>  }
>  
> +static void hellcreek_populate_fdb_entry(struct hellcreek *hellcreek,
> +					 struct hellcreek_fdb_entry *entry,
> +					 size_t idx)
> +{
> +	unsigned char addr[ETH_ALEN];

You could have assigned:

	unsigned char *addr = entry->mac;

and avoided the memcpy, but it doesn't really matter much.

> +	u16 meta, mac;
> +
> +	/* Read values */
> +	meta	= hellcreek_read(hellcreek, HR_FDBMDRD);
> +	mac	= hellcreek_read(hellcreek, HR_FDBRDL);
> +	addr[5] = mac & 0xff;
> +	addr[4] = (mac & 0xff00) >> 8;
> +	mac	= hellcreek_read(hellcreek, HR_FDBRDM);
> +	addr[3] = mac & 0xff;
> +	addr[2] = (mac & 0xff00) >> 8;
> +	mac	= hellcreek_read(hellcreek, HR_FDBRDH);
> +	addr[1] = mac & 0xff;
> +	addr[0] = (mac & 0xff00) >> 8;
> +
> +	/* Populate @entry */
> +	memcpy(entry->mac, addr, sizeof(addr));
> +	entry->idx	    = idx;
> +	entry->portmask	    = (meta & HR_FDBMDRD_PORTMASK_MASK) >>
> +		HR_FDBMDRD_PORTMASK_SHIFT;
> +	entry->age	    = (meta & HR_FDBMDRD_AGE_MASK) >>
> +		HR_FDBMDRD_AGE_SHIFT;
> +	entry->is_obt	    = !!(meta & HR_FDBMDRD_OBT);
> +	entry->pass_blocked = !!(meta & HR_FDBMDRD_PASS_BLOCKED);
> +	entry->is_static    = !!(meta & HR_FDBMDRD_STATIC);
> +	entry->reprio_tc    = (meta & HR_FDBMDRD_REPRIO_TC_MASK) >>
> +		HR_FDBMDRD_REPRIO_TC_SHIFT;
> +	entry->reprio_en    = !!(meta & HR_FDBMDRD_REPRIO_EN);
> +}
> +

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

Re: [PATCH net-next v2 3/4] net: dsa: hellcreek: Move common code to helper

[Florian Fainelli]

On 3/13/2021 1:39 AM, Kurt Kanzenbach wrote:
> There are two functions which need to populate fdb entries. Move that to a
> helper function.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

[PATCH net-next v2 4/4] net: dsa: hellcreek: Add devlink FDB region

[Kurt Kanzenbach]

Allow to dump the FDB table via devlink. This is a useful debugging feature.

Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/dsa/hirschmann/hellcreek.c | 62 ++++++++++++++++++++++++++
 drivers/net/dsa/hirschmann/hellcreek.h |  1 +
 2 files changed, 63 insertions(+)

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index 38ff0f12e8a4..02d8bcb37f31 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -1111,18 +1111,62 @@ static int hellcreek_devlink_region_vlan_snapshot(struct devlink *dl,
 	return 0;
 }
 
+static int hellcreek_devlink_region_fdb_snapshot(struct devlink *dl,
+						 const struct devlink_region_ops *ops,
+						 struct netlink_ext_ack *extack,
+						 u8 **data)
+{
+	struct dsa_switch *ds = dsa_devlink_to_ds(dl);
+	struct hellcreek_fdb_entry *table, *entry;
+	struct hellcreek *hellcreek = ds->priv;
+	size_t i;
+
+	table = kcalloc(hellcreek->fdb_entries, sizeof(*entry), GFP_KERNEL);
+	if (!table)
+		return -ENOMEM;
+
+	entry = table;
+
+	mutex_lock(&hellcreek->reg_lock);
+
+	/* Start table read */
+	hellcreek_read(hellcreek, HR_FDBMAX);
+	hellcreek_write(hellcreek, 0x00, HR_FDBMAX);
+
+	for (i = 0; i < hellcreek->fdb_entries; ++i, ++entry) {
+		/* Read current entry */
+		hellcreek_populate_fdb_entry(hellcreek, entry, i);
+
+		/* Advance read pointer */
+		hellcreek_write(hellcreek, 0x00, HR_FDBRDH);
+	}
+
+	mutex_unlock(&hellcreek->reg_lock);
+
+	*data = (u8 *)table;
+
+	return 0;
+}
+
 static struct devlink_region_ops hellcreek_region_vlan_ops = {
 	.name	    = "vlan",
 	.snapshot   = hellcreek_devlink_region_vlan_snapshot,
 	.destructor = kfree,
 };
 
+static struct devlink_region_ops hellcreek_region_fdb_ops = {
+	.name	    = "fdb",
+	.snapshot   = hellcreek_devlink_region_fdb_snapshot,
+	.destructor = kfree,
+};
+
 static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
 {
 	struct hellcreek *hellcreek = ds->priv;
 	struct devlink_region_ops *ops;
 	struct devlink_region *region;
 	u64 size;
+	int ret;
 
 	/* VLAN table */
 	size = VLAN_N_VID * sizeof(struct hellcreek_devlink_vlan_entry);
@@ -1134,13 +1178,31 @@ static int hellcreek_setup_devlink_regions(struct dsa_switch *ds)
 
 	hellcreek->vlan_region = region;
 
+	/* FDB table */
+	size = hellcreek->fdb_entries * sizeof(struct hellcreek_fdb_entry);
+	ops  = &hellcreek_region_fdb_ops;
+
+	region = dsa_devlink_region_create(ds, ops, 1, size);
+	if (IS_ERR(region)) {
+		ret = PTR_ERR(region);
+		goto err_fdb;
+	}
+
+	hellcreek->fdb_region = region;
+
 	return 0;
+
+err_fdb:
+	dsa_devlink_region_destroy(hellcreek->vlan_region);
+
+	return ret;
 }
 
 static void hellcreek_teardown_devlink_regions(struct dsa_switch *ds)
 {
 	struct hellcreek *hellcreek = ds->priv;
 
+	dsa_devlink_region_destroy(hellcreek->fdb_region);
 	dsa_devlink_region_destroy(hellcreek->vlan_region);
 }
 
diff --git a/drivers/net/dsa/hirschmann/hellcreek.h b/drivers/net/dsa/hirschmann/hellcreek.h
index 42339f9359d9..9e303b8ab13c 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.h
+++ b/drivers/net/dsa/hirschmann/hellcreek.h
@@ -279,6 +279,7 @@ struct hellcreek {
 	struct mutex vlan_lock;	/* VLAN bitmaps lock */
 	struct mutex ptp_lock;	/* PTP IP register lock */
 	struct devlink_region *vlan_region;
+	struct devlink_region *fdb_region;
 	void __iomem *base;
 	void __iomem *ptp_base;
 	u16 swcfg;		/* swcfg shadow */
-- 
2.30.2

Re: [PATCH net-next v2 4/4] net: dsa: hellcreek: Add devlink FDB region

[Vladimir Oltean]

On Sat, Mar 13, 2021 at 10:39:39AM +0100, Kurt Kanzenbach wrote:
> Allow to dump the FDB table via devlink. This is a useful debugging feature.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> ---

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

By the way, what user space program do you use to dump these? Did you
derive something from Andrew's mv88e6xxx_dump too? Maybe we should work
on something common?

Re: [PATCH net-next v2 4/4] net: dsa: hellcreek: Add devlink FDB region

[Kurt Kanzenbach]

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On Sat Mar 13 2021, Vladimir Oltean wrote:
> On Sat, Mar 13, 2021 at 10:39:39AM +0100, Kurt Kanzenbach wrote:
>> Allow to dump the FDB table via devlink. This is a useful debugging feature.
>> 
>> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
>> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
>> ---
>
> Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
>
> By the way, what user space program do you use to dump these? Did you
> derive something from Andrew's mv88e6xxx_dump too? Maybe we should work
> on something common?

Actually there is no user space tooling, yet. My original approach to
debugging was different using debugfs and tracing. I played a bit with
mv88e6xxx_dump today. Having a common tool would be quite nice.

Thanks,
Kurt

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Re: [PATCH net-next v2 4/4] net: dsa: hellcreek: Add devlink FDB region

[Kurt Kanzenbach]

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On Sun Mar 14 2021, Kurt Kanzenbach wrote:
> On Sat Mar 13 2021, Vladimir Oltean wrote:
>> On Sat, Mar 13, 2021 at 10:39:39AM +0100, Kurt Kanzenbach wrote:
>>> Allow to dump the FDB table via devlink. This is a useful debugging feature.
>>> 
>>> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
>>> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
>>> ---
>>
>> Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
>>
>> By the way, what user space program do you use to dump these? Did you
>> derive something from Andrew's mv88e6xxx_dump too? Maybe we should work
>> on something common?
>
> Actually there is no user space tooling, yet. My original approach to
> debugging was different using debugfs and tracing. I played a bit with
> mv88e6xxx_dump today. Having a common tool would be quite nice.

Thanks for the pointer to mv88e6xxx_dump. Just needed to implement
.devlink_info_get() callback, so that the tool can distinguish between
the Marvell and Hellcreek devices (and implement some hellcreek
specifics).

Thanks,
Kurt

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Re: [PATCH net-next v2 4/4] net: dsa: hellcreek: Add devlink FDB region

[Florian Fainelli]

On 3/13/2021 1:39 AM, Kurt Kanzenbach wrote:
> Allow to dump the FDB table via devlink. This is a useful debugging feature.
> 
> Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Re: [PATCH net-next v2 0/4] net: dsa: hellcreek: Add support for dumping tables

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (refs/heads/master):

On Sat, 13 Mar 2021 10:39:35 +0100 you wrote:
> Hi,
> 
> add support for dumping the VLAN and FDB table via devlink. As the driver uses
> internal VLANs and static FDB entries, this is a useful debugging feature.
> 
> Changes since v1:
> 
> [...]

Here is the summary with links:
  - [net-next,v2,1/4] net: dsa: hellcreek: Add devlink VLAN region
    https://git.kernel.org/netdev/net-next/c/ba2d1c28886c
  - [net-next,v2,2/4] net: dsa: hellcreek: Use boolean value
    https://git.kernel.org/netdev/net-next/c/e81813fb5635
  - [net-next,v2,3/4] net: dsa: hellcreek: Move common code to helper
    https://git.kernel.org/netdev/net-next/c/eb5f3d314180
  - [net-next,v2,4/4] net: dsa: hellcreek: Add devlink FDB region
    https://git.kernel.org/netdev/net-next/c/292cd449fee3

You are awesome, thank you!
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