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Message-ID: <046a334b-d972-6ab9-5127-f845cef72751@gmail.com>
Date: Tue, 26 Apr 2022 08:45:18 -0700
From: Florian Fainelli <f.fainelli@...il.com>
To: Frank Wunderlich <linux@...web.de>,
linux-mediatek@...ts.infradead.org,
linux-rockchip@...ts.infradead.org
Cc: Frank Wunderlich <frank-w@...lic-files.de>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Heiko Stuebner <heiko@...ech.de>,
Sean Wang <sean.wang@...iatek.com>,
Landen Chao <Landen.Chao@...iatek.com>,
DENG Qingfang <dqfext@...il.com>, Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Peter Geis <pgwipeout@...il.com>, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org
Subject: Re: [RFC v1 2/3] net: dsa: mt753x: make CPU-Port dynamic
On 4/26/22 06:49, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@...lic-files.de>
>
> Currently CPU-Port is hardcoded to Port 6.
>
> On BPI-R2-Pro board this port is not connected and only Port 5 is
> connected to gmac of SoC.
>
> Replace this hardcoded CPU-Port with a member in mt7530_priv struct
> which is set in mt753x_cpu_port_enable to the right port.
>
> I defined a default in probe (in case no CPU-Port will be setup) and
> if both cpu-port were setup port 6 will be used like the const prior
> this patch.
>
> In mt7531_setup first access is before we know which port should be used
> (mt753x_cpu_port_enable) so section "BPDU to CPU port" needs to be moved
> down.
>
> Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
> ---
> drivers/net/dsa/mt7530.c | 46 ++++++++++++++++++++++------------------
> drivers/net/dsa/mt7530.h | 2 +-
> 2 files changed, 26 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
> index ccf4cb944167..4789105b8137 100644
> --- a/drivers/net/dsa/mt7530.c
> +++ b/drivers/net/dsa/mt7530.c
> @@ -1004,6 +1004,7 @@ mt753x_cpu_port_enable(struct dsa_switch *ds, int port)
> return ret;
> }
>
> + priv->cpu_port = port;
> /* Enable Mediatek header mode on the cpu port */
> mt7530_write(priv, MT7530_PVC_P(port),
> PORT_SPEC_TAG);
> @@ -1041,7 +1042,7 @@ mt7530_port_enable(struct dsa_switch *ds, int port,
> * restore the port matrix if the port is the member of a certain
> * bridge.
> */
> - priv->ports[port].pm |= PCR_MATRIX(BIT(MT7530_CPU_PORT));
> + priv->ports[port].pm |= PCR_MATRIX(BIT(priv->cpu_port));
> priv->ports[port].enable = true;
> mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK,
> priv->ports[port].pm);
> @@ -1190,8 +1191,8 @@ mt7530_port_bridge_join(struct dsa_switch *ds, int port,
> struct netlink_ext_ack *extack)
> {
> struct dsa_port *dp = dsa_to_port(ds, port), *other_dp;
> - u32 port_bitmap = BIT(MT7530_CPU_PORT);
> struct mt7530_priv *priv = ds->priv;
> + u32 port_bitmap = BIT(priv->cpu_port);
No need to re-order these two lines.
>
> mutex_lock(&priv->reg_mutex);
>
> @@ -1267,9 +1268,9 @@ mt7530_port_set_vlan_unaware(struct dsa_switch *ds, int port)
> * the CPU port get out of VLAN filtering mode.
> */
> if (all_user_ports_removed) {
> - mt7530_write(priv, MT7530_PCR_P(MT7530_CPU_PORT),
> + mt7530_write(priv, MT7530_PCR_P(priv->cpu_port),
> PCR_MATRIX(dsa_user_ports(priv->ds)));
> - mt7530_write(priv, MT7530_PVC_P(MT7530_CPU_PORT), PORT_SPEC_TAG
> + mt7530_write(priv, MT7530_PVC_P(priv->cpu_port), PORT_SPEC_TAG
> | PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT));
> }
> }
> @@ -1335,8 +1336,8 @@ mt7530_port_bridge_leave(struct dsa_switch *ds, int port,
> */
> if (priv->ports[port].enable)
> mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK,
> - PCR_MATRIX(BIT(MT7530_CPU_PORT)));
> - priv->ports[port].pm = PCR_MATRIX(BIT(MT7530_CPU_PORT));
> + PCR_MATRIX(BIT(priv->cpu_port)));
> + priv->ports[port].pm = PCR_MATRIX(BIT(priv->cpu_port));
>
> /* When a port is removed from the bridge, the port would be set up
> * back to the default as is at initial boot which is a VLAN-unaware
> @@ -1503,6 +1504,7 @@ static int
> mt7530_port_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering,
> struct netlink_ext_ack *extack)
> {
> + struct mt7530_priv *priv = ds->priv;
Add a space to separate declaration from code.
> if (vlan_filtering) {
> /* The port is being kept as VLAN-unaware port when bridge is
> * set up with vlan_filtering not being set, Otherwise, the
> @@ -1510,7 +1512,7 @@ mt7530_port_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering,
> * for becoming a VLAN-aware port.
> */
> mt7530_port_set_vlan_aware(ds, port);
> - mt7530_port_set_vlan_aware(ds, MT7530_CPU_PORT);
> + mt7530_port_set_vlan_aware(ds, priv->cpu_port);
> } else {
> mt7530_port_set_vlan_unaware(ds, port);
> }
> @@ -1526,7 +1528,7 @@ mt7530_hw_vlan_add(struct mt7530_priv *priv,
> u32 val;
>
> new_members = entry->old_members | BIT(entry->port) |
> - BIT(MT7530_CPU_PORT);
> + BIT(priv->cpu_port);
>
> /* Validate the entry with independent learning, create egress tag per
> * VLAN and joining the port as one of the port members.
> @@ -1550,8 +1552,8 @@ mt7530_hw_vlan_add(struct mt7530_priv *priv,
> * DSA tag.
> */
> mt7530_rmw(priv, MT7530_VAWD2,
> - ETAG_CTRL_P_MASK(MT7530_CPU_PORT),
> - ETAG_CTRL_P(MT7530_CPU_PORT,
> + ETAG_CTRL_P_MASK(priv->cpu_port),
> + ETAG_CTRL_P(priv->cpu_port,
> MT7530_VLAN_EGRESS_STACK));
> }
>
> @@ -1575,7 +1577,7 @@ mt7530_hw_vlan_del(struct mt7530_priv *priv,
> * the entry would be kept valid. Otherwise, the entry is got to be
> * disabled.
> */
> - if (new_members && new_members != BIT(MT7530_CPU_PORT)) {
> + if (new_members && new_members != BIT(priv->cpu_port)) {
> val = IVL_MAC | VTAG_EN | PORT_MEM(new_members) |
> VLAN_VALID;
> mt7530_write(priv, MT7530_VAWD1, val);
> @@ -2105,7 +2107,7 @@ mt7530_setup(struct dsa_switch *ds)
> * controller also is the container for two GMACs nodes representing
> * as two netdev instances.
> */
> - dn = dsa_to_port(ds, MT7530_CPU_PORT)->master->dev.of_node->parent;
> + dn = dsa_to_port(ds, priv->cpu_port)->master->dev.of_node->parent;
> ds->assisted_learning_on_cpu_port = true;
> ds->mtu_enforcement_ingress = true;
>
> @@ -2337,15 +2339,6 @@ mt7531_setup(struct dsa_switch *ds)
> mt7531_ind_c45_phy_write(priv, MT753X_CTRL_PHY_ADDR, MDIO_MMD_VEND2,
> CORE_PLL_GROUP4, val);
>
> - /* BPDU to CPU port */
> - mt7530_rmw(priv, MT7531_CFC, MT7531_CPU_PMAP_MASK,
> - BIT(MT7530_CPU_PORT));
> - mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK,
> - MT753X_BPDU_CPU_ONLY);
> -
> - /* Enable and reset MIB counters */
> - mt7530_mib_reset(ds);
> -
> for (i = 0; i < MT7530_NUM_PORTS; i++) {
> /* Disable forwarding by default on all ports */
> mt7530_rmw(priv, MT7530_PCR_P(i), PCR_MATRIX_MASK,
> @@ -2373,6 +2366,15 @@ mt7531_setup(struct dsa_switch *ds)
> PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT));
> }
>
> + /* BPDU to CPU port */
> + mt7530_rmw(priv, MT7531_CFC, MT7531_CPU_PMAP_MASK,
> + BIT(priv->cpu_port));
> + mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK,
> + MT753X_BPDU_CPU_ONLY);
> +
> + /* Enable and reset MIB counters */
> + mt7530_mib_reset(ds);
> +
> /* Setup VLAN ID 0 for VLAN-unaware bridges */
> ret = mt7530_setup_vlan0(priv);
> if (ret)
> @@ -3213,6 +3215,8 @@ mt7530_probe(struct mdio_device *mdiodev)
> if (!priv)
> return -ENOMEM;
>
> + priv->cpu_port = 6;
> +
> priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL);
> if (!priv->ds)
> return -ENOMEM;
> diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
> index 91508e2feef9..62df8d10f6d4 100644
> --- a/drivers/net/dsa/mt7530.h
> +++ b/drivers/net/dsa/mt7530.h
> @@ -8,7 +8,6 @@
>
> #define MT7530_NUM_PORTS 7
> #define MT7530_NUM_PHYS 5
> -#define MT7530_CPU_PORT 6
We could have kept this define and rename it MT7530_DEFAULT_CPU_PORT or
something and in m7530_probe() use that newly renamed constant to
illustrate that we have a default value assigned, just in case.
> #define MT7530_NUM_FDB_RECORDS 2048
> #define MT7530_ALL_MEMBERS 0xff
>
> @@ -823,6 +822,7 @@ struct mt7530_priv {
> u8 mirror_tx;
>
> struct mt7530_port ports[MT7530_NUM_PORTS];
> + int cpu_port;
This can be an unsigned integer since you do not assign negative values.
With that fixes, this looks good to me.
--
Florian
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