[PATCH net-next v5 00/16] net: dsa: vsc73xx: Make vsc73xx usable

[PATCH net-next v5 00/16] net: dsa: vsc73xx: Make vsc73xx usable

[Pawel Dembicki]

This patch series focuses on making vsc73xx usable.

The first patch was added in v2; it switches from a poll loop to
read_poll_timeout.

The second patch is a simple conversion to phylink because adjust_link
won't work anymore.

The third patch is preparation for future use. Using the
"phy_interface_mode_is_rgmii" macro allows for the proper recognition
of all RGMII modes.

Patches 4-5 involve some cleanup: The fourth patch introduces
a definition with the maximum number of ports to avoid using
magic numbers. The next one fills in documentation.

The sixth patch implements port state configuration, which is required
for bridge functionality. STP frames are not forwarded at this moment.
BPDU frames are only forwarded from/to the PI/SI interface.
For more information, see chapter 2.7.1 (CPU Forwarding) in the
datasheet.

Patches 7, 12-15 provide a basic implementation of tag8021q
functionality with QinQ support, without VLAN filtering in
the bridge and simple VLAN awareness in VLAN filtering mode.

Patches 8-11 came from Vladimir Oltean. They prepare for making
tag8021q more common. VSC73XX uses very similar tag recognition,
and some code from tag_sja1105 could be moved to tag8021q for
common use.

Patch 16 is required to avoid problem with learning on standalone ports.

Pawel Dembicki (12):
  net: dsa: vsc73xx: use read_poll_timeout instead delay loop
  net: dsa: vsc73xx: convert to PHYLINK
  net: dsa: vsc73xx: use macros for rgmii recognition
  net: dsa: vsc73xx: Add define for max num of ports
  net: dsa: vsc73xx: add structure descriptions
  net: dsa: vsc73xx: add port_stp_state_set function
  net: dsa: vsc73xx: Add vlan filtering
  net: dsa: vsc73xx: introduce tag 8021q for vsc73xx
  net: dsa: vsc73xx: Implement the tag_8021q VLAN operations
  net: dsa: Define max num of bridges in tag8021q implementation
  net: dsa: vsc73xx: Add bridge support
  net: dsa: vsc73xx: start treating the BR_LEARNING flag

Vladimir Oltean (4):
  net: dsa: tag_sja1105: absorb logic for not overwriting precise info
    into dsa_8021q_rcv()
  net: dsa: tag_sja1105: absorb entire sja1105_vlan_rcv() into
    dsa_8021q_rcv()
  net: dsa: tag_sja1105: prefer precise source port info on SJA1110 too
  net: dsa: tag_sja1105: refactor skb->dev assignment to
    dsa_tag_8021q_find_user()

 drivers/net/dsa/Kconfig                |   2 +-
 drivers/net/dsa/sja1105/sja1105_main.c |   3 +-
 drivers/net/dsa/vitesse-vsc73xx-core.c | 990 +++++++++++++++++++++----
 drivers/net/dsa/vitesse-vsc73xx.h      |  56 +-
 include/linux/dsa/8021q.h              |   5 +
 include/net/dsa.h                      |   2 +
 net/dsa/Kconfig                        |   6 +
 net/dsa/Makefile                       |   1 +
 net/dsa/tag_8021q.c                    |  81 +-
 net/dsa/tag_8021q.h                    |   7 +-
 net/dsa/tag_ocelot_8021q.c             |   2 +-
 net/dsa/tag_sja1105.c                  |  72 +-
 net/dsa/tag_vsc73xx_8021q.c            |  66 ++
 13 files changed, 1071 insertions(+), 222 deletions(-)
 create mode 100644 net/dsa/tag_vsc73xx_8021q.c

-- 
2.34.1

[PATCH net-next v5 01/16] net: dsa: vsc73xx: use read_poll_timeout instead delay loop

[Pawel Dembicki]

Switch the delay loop during the Arbiter empty check from
vsc73xx_adjust_link() to use read_poll_timeout(). Functionally,
one msleep() call is eliminated at the end of the loop in the timeout
case.

As Russell King suggested:

"This [change] avoids the issue that on the last iteration, the code reads
the register, tests it, finds the condition that's being waiting for is
false, _then_ waits and end up printing the error message - that last
wait is rather useless, and as the arbiter state isn't checked after
waiting, it could be that we had success during the last wait."

Suggested-by: Russell King <linux@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - improved commit description
  - added two defines instead magic numbers
  - added include with iopoll.h
v4:
  - resend patch
v3:
  - added "Reviewed-by" to commit message only
v2:
  - introduced patch

 drivers/net/dsa/vitesse-vsc73xx-core.c | 30 ++++++++++++++------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index ae70eac3be28..ab5771d4d828 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -17,6 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/device.h>
+#include <linux/iopoll.h>
 #include <linux/of.h>
 #include <linux/of_mdio.h>
 #include <linux/bitops.h>
@@ -268,6 +269,9 @@
 #define IS_7398(a) ((a)->chipid == VSC73XX_CHIPID_ID_7398)
 #define IS_739X(a) (IS_7395(a) || IS_7398(a))
 
+#define VSC73XX_POLL_SLEEP_US		1000
+#define VSC73XX_POLL_TIMEOUT_US		10000
+
 struct vsc73xx_counter {
 	u8 counter;
 	const char *name;
@@ -779,7 +783,7 @@ static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
 	 * after a PHY or the CPU port comes up or down.
 	 */
 	if (!phydev->link) {
-		int maxloop = 10;
+		int ret, err;
 
 		dev_dbg(vsc->dev, "port %d: went down\n",
 			port);
@@ -794,19 +798,17 @@ static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
 				    VSC73XX_ARBDISC, BIT(port), BIT(port));
 
 		/* Wait until queue is empty */
-		vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0,
-			     VSC73XX_ARBEMPTY, &val);
-		while (!(val & BIT(port))) {
-			msleep(1);
-			vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0,
-				     VSC73XX_ARBEMPTY, &val);
-			if (--maxloop == 0) {
-				dev_err(vsc->dev,
-					"timeout waiting for block arbiter\n");
-				/* Continue anyway */
-				break;
-			}
-		}
+		ret = read_poll_timeout(vsc73xx_read, err,
+					err < 0 || (val & BIT(port)),
+					VSC73XX_POLL_SLEEP_US,
+					VSC73XX_POLL_TIMEOUT_US, false,
+					vsc, VSC73XX_BLOCK_ARBITER, 0,
+					VSC73XX_ARBEMPTY, &val);
+		if (ret)
+			dev_err(vsc->dev,
+				"timeout waiting for block arbiter\n");
+		else if (err < 0)
+			dev_err(vsc->dev, "error reading arbiter\n");
 
 		/* Put this port into reset */
 		vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG,
-- 
2.34.1

[PATCH net-next v5 02/16] net: dsa: vsc73xx: convert to PHYLINK

[Pawel Dembicki]

This patch replaces the adjust_link api with the phylink apis that provide
equivalent functionality.

The remaining functionality from the adjust_link is now covered in the
phylink_mac_link_* and phylink_mac_config.

Removes:
.adjust_link
Adds:
.phylink_mac_config
.phylink_mac_link_up
.phylink_mac_link_down

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - introduce MAC reset function with procedure described in datasheet
  - reorganise routines
  - move 'Accept packets again' routine to 'phylink_mac_link_up'
  - fix one FIXME
v4:
  - update commit descripion
  - remove phylink_get_caps after rebase to current net-next/main
v3:
  - remove legacy_pre_march2020 after rebase
v2:
  - replace switch to if and get rid of macros in
    vsc73xx_phylink_mac_link_up function

 drivers/net/dsa/vitesse-vsc73xx-core.c | 235 ++++++++++++-------------
 1 file changed, 109 insertions(+), 126 deletions(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index ab5771d4d828..cb2e7e256279 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -717,52 +717,43 @@ static void vsc73xx_init_port(struct vsc73xx *vsc, int port)
 		      port, VSC73XX_C_RX0, 0);
 }
 
-static void vsc73xx_adjust_enable_port(struct vsc73xx *vsc,
-				       int port, struct phy_device *phydev,
-				       u32 initval)
+static void vsc73xx_reset_port(struct vsc73xx *vsc, int port, u32 initval)
 {
-	u32 val = initval;
-	u8 seed;
-
-	/* Reset this port FIXME: break out subroutine */
-	val |= VSC73XX_MAC_CFG_RESET;
-	vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val);
-
-	/* Seed the port randomness with randomness */
-	get_random_bytes(&seed, 1);
-	val |= seed << VSC73XX_MAC_CFG_SEED_OFFSET;
-	val |= VSC73XX_MAC_CFG_SEED_LOAD;
-	val |= VSC73XX_MAC_CFG_WEXC_DIS;
-	vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val);
+	int ret, err;
+	u32 val;
 
-	/* Flow control for the PHY facing ports:
-	 * Use a zero delay pause frame when pause condition is left
-	 * Obey pause control frames
-	 * When generating pause frames, use 0xff as pause value
-	 */
-	vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_FCCONF,
-		      VSC73XX_FCCONF_ZERO_PAUSE_EN |
-		      VSC73XX_FCCONF_FLOW_CTRL_OBEY |
-		      0xff);
+	/* Disable RX on this port */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port,
+			    VSC73XX_MAC_CFG,
+			    VSC73XX_MAC_CFG_RX_EN, 0);
 
-	/* Disallow backward dropping of frames from this port */
+	/* Discard packets */
 	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
-			    VSC73XX_SBACKWDROP, BIT(port), 0);
+			    VSC73XX_ARBDISC, BIT(port), BIT(port));
+
+	/* Wait until queue is empty */
+	ret = read_poll_timeout(vsc73xx_read, err,
+				err < 0 || (val & BIT(port)),
+				VSC73XX_POLL_SLEEP_US,
+				VSC73XX_POLL_TIMEOUT_US, false,
+				vsc, VSC73XX_BLOCK_ARBITER, 0,
+				VSC73XX_ARBEMPTY, &val);
+	if (ret)
+		dev_err(vsc->dev,
+			"timeout waiting for block arbiter\n");
+	else if (err < 0)
+		dev_err(vsc->dev, "error reading arbiter\n");
 
-	/* Enable TX, RX, deassert reset, stop loading seed */
-	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port,
-			    VSC73XX_MAC_CFG,
-			    VSC73XX_MAC_CFG_RESET | VSC73XX_MAC_CFG_SEED_LOAD |
-			    VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN,
-			    VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN);
+	/* Put this port into reset */
+	vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG,
+		      VSC73XX_MAC_CFG_RESET | initval);
 }
 
-static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
-				struct phy_device *phydev)
+static void vsc73xx_phylink_mac_config(struct dsa_switch *ds, int port,
+				       unsigned int mode,
+				       const struct phylink_link_state *state)
 {
 	struct vsc73xx *vsc = ds->priv;
-	u32 val;
-
 	/* Special handling of the CPU-facing port */
 	if (port == CPU_PORT) {
 		/* Other ports are already initialized but not this one */
@@ -778,102 +769,92 @@ static void vsc73xx_adjust_link(struct dsa_switch *ds, int port,
 			      VSC73XX_ADVPORTM_ENA_GTX |
 			      VSC73XX_ADVPORTM_DDR_MODE);
 	}
+}
+
+static void vsc73xx_phylink_mac_link_down(struct dsa_switch *ds, int port,
+					  unsigned int mode,
+					  phy_interface_t interface)
+{
+	struct vsc73xx *vsc = ds->priv;
 
-	/* This is the MAC confiuration that always need to happen
-	 * after a PHY or the CPU port comes up or down.
+	/* This routine is described in the datasheet (below ARBDISC register
+	 * description)
 	 */
-	if (!phydev->link) {
-		int ret, err;
-
-		dev_dbg(vsc->dev, "port %d: went down\n",
-			port);
-
-		/* Disable RX on this port */
-		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port,
-				    VSC73XX_MAC_CFG,
-				    VSC73XX_MAC_CFG_RX_EN, 0);
-
-		/* Discard packets */
-		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
-				    VSC73XX_ARBDISC, BIT(port), BIT(port));
-
-		/* Wait until queue is empty */
-		ret = read_poll_timeout(vsc73xx_read, err,
-					err < 0 || (val & BIT(port)),
-					VSC73XX_POLL_SLEEP_US,
-					VSC73XX_POLL_TIMEOUT_US, false,
-					vsc, VSC73XX_BLOCK_ARBITER, 0,
-					VSC73XX_ARBEMPTY, &val);
-		if (ret)
-			dev_err(vsc->dev,
-				"timeout waiting for block arbiter\n");
-		else if (err < 0)
-			dev_err(vsc->dev, "error reading arbiter\n");
-
-		/* Put this port into reset */
-		vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG,
-			      VSC73XX_MAC_CFG_RESET);
-
-		/* Accept packets again */
-		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
-				    VSC73XX_ARBDISC, BIT(port), 0);
-
-		/* Allow backward dropping of frames from this port */
-		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
-				    VSC73XX_SBACKWDROP, BIT(port), BIT(port));
-
-		/* Receive mask (disable forwarding) */
-		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
-				    VSC73XX_RECVMASK, BIT(port), 0);
+	vsc73xx_reset_port(vsc, port, 0);
 
-		return;
-	}
+	/* Allow backward dropping of frames from this port */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
+			    VSC73XX_SBACKWDROP, BIT(port), BIT(port));
 
-	/* Figure out what speed was negotiated */
-	if (phydev->speed == SPEED_1000) {
-		dev_dbg(vsc->dev, "port %d: 1000 Mbit mode full duplex\n",
-			port);
-
-		/* Set up default for internal port or external RGMII */
-		if (phydev->interface == PHY_INTERFACE_MODE_RGMII)
-			val = VSC73XX_MAC_CFG_1000M_F_RGMII;
-		else
-			val = VSC73XX_MAC_CFG_1000M_F_PHY;
-		vsc73xx_adjust_enable_port(vsc, port, phydev, val);
-	} else if (phydev->speed == SPEED_100) {
-		if (phydev->duplex == DUPLEX_FULL) {
-			val = VSC73XX_MAC_CFG_100_10M_F_PHY;
-			dev_dbg(vsc->dev,
-				"port %d: 100 Mbit full duplex mode\n",
-				port);
-		} else {
-			val = VSC73XX_MAC_CFG_100_10M_H_PHY;
-			dev_dbg(vsc->dev,
-				"port %d: 100 Mbit half duplex mode\n",
-				port);
-		}
-		vsc73xx_adjust_enable_port(vsc, port, phydev, val);
-	} else if (phydev->speed == SPEED_10) {
-		if (phydev->duplex == DUPLEX_FULL) {
-			val = VSC73XX_MAC_CFG_100_10M_F_PHY;
-			dev_dbg(vsc->dev,
-				"port %d: 10 Mbit full duplex mode\n",
-				port);
-		} else {
-			val = VSC73XX_MAC_CFG_100_10M_H_PHY;
-			dev_dbg(vsc->dev,
-				"port %d: 10 Mbit half duplex mode\n",
-				port);
-		}
-		vsc73xx_adjust_enable_port(vsc, port, phydev, val);
-	} else {
-		dev_err(vsc->dev,
-			"could not adjust link: unknown speed\n");
-	}
+	/* Receive mask (disable forwarding) */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+			    VSC73XX_RECVMASK, BIT(port), 0);
+}
+
+static void vsc73xx_phylink_mac_link_up(struct dsa_switch *ds, int port,
+					unsigned int mode,
+					phy_interface_t interface,
+					struct phy_device *phydev,
+					int speed, int duplex,
+					bool tx_pause, bool rx_pause)
+{
+	struct vsc73xx *vsc = ds->priv;
+	u32 val;
+	u8 seed;
+
+	if (speed == SPEED_1000)
+		val = VSC73XX_MAC_CFG_GIGA_MODE | VSC73XX_MAC_CFG_TX_IPG_1000M;
+	else
+		val = VSC73XX_MAC_CFG_TX_IPG_100_10M;
+
+	if (interface == PHY_INTERFACE_MODE_RGMII)
+		val |= VSC73XX_MAC_CFG_CLK_SEL_1000M;
+	else
+		val |= VSC73XX_MAC_CFG_CLK_SEL_EXT;
+
+	if (duplex == DUPLEX_FULL)
+		val |= VSC73XX_MAC_CFG_FDX;
+
+	/* This routine is described in the datasheet (below ARBDISC register
+	 * description)
+	 */
+	vsc73xx_reset_port(vsc, port, val);
+
+	/* Seed the port randomness with randomness */
+	get_random_bytes(&seed, 1);
+	val |= seed << VSC73XX_MAC_CFG_SEED_OFFSET;
+	val |= VSC73XX_MAC_CFG_SEED_LOAD;
+	val |= VSC73XX_MAC_CFG_WEXC_DIS;
+	vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val);
+
+	/* Flow control for the PHY facing ports:
+	 * Use a zero delay pause frame when pause condition is left
+	 * Obey pause control frames
+	 * When generating pause frames, use 0xff as pause value
+	 */
+	vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_FCCONF,
+		      VSC73XX_FCCONF_ZERO_PAUSE_EN |
+		      VSC73XX_FCCONF_FLOW_CTRL_OBEY |
+		      0xff);
+
+	/* Accept packets again */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
+			    VSC73XX_ARBDISC, BIT(port), 0);
 
 	/* Enable port (forwarding) in the receieve mask */
 	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
 			    VSC73XX_RECVMASK, BIT(port), BIT(port));
+
+	/* Disallow backward dropping of frames from this port */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
+			    VSC73XX_SBACKWDROP, BIT(port), 0);
+
+	/* Enable TX, RX, deassert reset, stop loading seed */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port,
+			    VSC73XX_MAC_CFG,
+			    VSC73XX_MAC_CFG_RESET | VSC73XX_MAC_CFG_SEED_LOAD |
+			    VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN,
+			    VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN);
 }
 
 static int vsc73xx_port_enable(struct dsa_switch *ds, int port,
@@ -1060,7 +1041,9 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.setup = vsc73xx_setup,
 	.phy_read = vsc73xx_phy_read,
 	.phy_write = vsc73xx_phy_write,
-	.adjust_link = vsc73xx_adjust_link,
+	.phylink_mac_config = vsc73xx_phylink_mac_config,
+	.phylink_mac_link_down = vsc73xx_phylink_mac_link_down,
+	.phylink_mac_link_up = vsc73xx_phylink_mac_link_up,
 	.get_strings = vsc73xx_get_strings,
 	.get_ethtool_stats = vsc73xx_get_ethtool_stats,
 	.get_sset_count = vsc73xx_get_sset_count,
-- 
2.34.1

[PATCH net-next v5 03/16] net: dsa: vsc73xx: use macros for rgmii recognition

[Pawel Dembicki]

It's preparation for future use. At this moment, the RGMII port is used
only for a connection to the MAC interface, but in the future, someone
could connect a PHY to it. Using the "phy_interface_mode_is_rgmii" macro
allows for the proper recognition of all RGMII modes.

Suggested-by: Russell King <linux@armlinux.org.uk>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
---
v5:
  - added 'Reviewed-by' only
v4:
  - introduced patch

 drivers/net/dsa/vitesse-vsc73xx-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index cb2e7e256279..8ed8fc997d6d 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -807,7 +807,7 @@ static void vsc73xx_phylink_mac_link_up(struct dsa_switch *ds, int port,
 	else
 		val = VSC73XX_MAC_CFG_TX_IPG_100_10M;
 
-	if (interface == PHY_INTERFACE_MODE_RGMII)
+	if (phy_interface_mode_is_rgmii(interface))
 		val |= VSC73XX_MAC_CFG_CLK_SEL_1000M;
 	else
 		val |= VSC73XX_MAC_CFG_CLK_SEL_EXT;
-- 
2.34.1

[PATCH net-next v5 04/16] net: dsa: vsc73xx: Add define for max num of ports

[Pawel Dembicki]

This patch introduces a new define: VSC73XX_MAX_NUM_PORTS, which can be
used in the future instead of a hardcoded value.

Currently, the only hardcoded value is vsc->ds->num_ports. It is being
replaced with the new define.

Suggested-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
---
v5:
  - added 'Reviewed-by' only
v4:
  - Resend patch
v3:
  - Introduce patch

 drivers/net/dsa/vitesse-vsc73xx-core.c | 13 +------------
 drivers/net/dsa/vitesse-vsc73xx.h      | 11 +++++++++++
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index 8ed8fc997d6d..425999d7bf41 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -1180,23 +1180,12 @@ int vsc73xx_probe(struct vsc73xx *vsc)
 		 vsc->addr[0], vsc->addr[1], vsc->addr[2],
 		 vsc->addr[3], vsc->addr[4], vsc->addr[5]);
 
-	/* The VSC7395 switch chips have 5+1 ports which means 5
-	 * ordinary ports and a sixth CPU port facing the processor
-	 * with an RGMII interface. These ports are numbered 0..4
-	 * and 6, so they leave a "hole" in the port map for port 5,
-	 * which is invalid.
-	 *
-	 * The VSC7398 has 8 ports, port 7 is again the CPU port.
-	 *
-	 * We allocate 8 ports and avoid access to the nonexistant
-	 * ports.
-	 */
 	vsc->ds = devm_kzalloc(dev, sizeof(*vsc->ds), GFP_KERNEL);
 	if (!vsc->ds)
 		return -ENOMEM;
 
 	vsc->ds->dev = dev;
-	vsc->ds->num_ports = 8;
+	vsc->ds->num_ports = VSC73XX_MAX_NUM_PORTS;
 	vsc->ds->priv = vsc;
 
 	vsc->ds->ops = &vsc73xx_ds_ops;
diff --git a/drivers/net/dsa/vitesse-vsc73xx.h b/drivers/net/dsa/vitesse-vsc73xx.h
index 30b1f0a36566..fee1378508b5 100644
--- a/drivers/net/dsa/vitesse-vsc73xx.h
+++ b/drivers/net/dsa/vitesse-vsc73xx.h
@@ -3,6 +3,17 @@
 #include <linux/etherdevice.h>
 #include <linux/gpio/driver.h>
 
+/* The VSC7395 switch chips have 5+1 ports which means 5 ordinary ports and
+ * a sixth CPU port facing the processor with an RGMII interface. These ports
+ * are numbered 0..4 and 6, so they leave a "hole" in the port map for port 5,
+ * which is invalid.
+ *
+ * The VSC7398 has 8 ports, port 7 is again the CPU port.
+ *
+ * We allocate 8 ports and avoid access to the nonexistent ports.
+ */
+#define VSC73XX_MAX_NUM_PORTS	8
+
 /**
  * struct vsc73xx - VSC73xx state container
  */
-- 
2.34.1

[PATCH net-next v5 05/16] net: dsa: vsc73xx: add structure descriptions

[Pawel Dembicki]

This commit adds updates to the documentation describing the structures
used in vsc73xx. This will help prevent kdoc-related issues in the future.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - improved description and stick to 80 characters per line
v4:
  - introduced patch

 drivers/net/dsa/vitesse-vsc73xx.h | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx.h b/drivers/net/dsa/vitesse-vsc73xx.h
index fee1378508b5..e7b08599a625 100644
--- a/drivers/net/dsa/vitesse-vsc73xx.h
+++ b/drivers/net/dsa/vitesse-vsc73xx.h
@@ -15,7 +15,16 @@
 #define VSC73XX_MAX_NUM_PORTS	8
 
 /**
- * struct vsc73xx - VSC73xx state container
+ * struct vsc73xx - VSC73xx state container: main data structure
+ * @dev: The device pointer
+ * @reset: The descriptor for the GPIO line tied to the reset pin
+ * @ds: Pointer to the DSA core structure
+ * @gc: Main structure of the GPIO controller
+ * @chipid: Storage for the Chip ID value read from the CHIPID register of the
+ *	sswitch
+ * @addr: MAC address used in flow control frames
+ * @ops: Structure with hardware-dependent operations
+ * @priv: Pointer to the configuration interface structure
  */
 struct vsc73xx {
 	struct device			*dev;
@@ -28,6 +37,11 @@ struct vsc73xx {
 	void				*priv;
 };
 
+/**
+ * struct vsc73xx_ops - VSC73xx methods container
+ * @read: Method for register reading over the hardware-dependent interface
+ * @write: Method for register writing over the hardware-dependent interface
+ */
 struct vsc73xx_ops {
 	int (*read)(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg,
 		    u32 *val);
-- 
2.34.1

[PATCH net-next v5 06/16] net: dsa: vsc73xx: add port_stp_state_set function

[Pawel Dembicki]

This isn't a fully functional implementation of 802.1D, but
port_stp_state_set is required for a future tag8021q operations.

This implementation handles properly all states, but vsc73xx doesn't
forward STP packets.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - remove unneeded 'RECVMASK' operations
  - reorganise vsc73xx_refresh_fwd_map function
v4:
  - fully reworked port_stp_state_set
v3:
  - use 'VSC73XX_MAX_NUM_PORTS' define
  - add 'state == BR_STATE_DISABLED' condition
  - fix style issues
v2:
  - fix kdoc

 drivers/net/dsa/vitesse-vsc73xx-core.c | 99 +++++++++++++++++++++++---
 1 file changed, 88 insertions(+), 11 deletions(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index 425999d7bf41..c3ef4c22f687 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -164,6 +164,10 @@
 #define VSC73XX_AGENCTRL	0xf0
 #define VSC73XX_CAPRST		0xff
 
+#define VSC73XX_SRCMASKS_CPU_COPY		BIT(27)
+#define VSC73XX_SRCMASKS_MIRROR			BIT(26)
+#define VSC73XX_SRCMASKS_PORTS_MASK		GENMASK(7, 0)
+
 #define VSC73XX_MACACCESS_CPU_COPY		BIT(14)
 #define VSC73XX_MACACCESS_FWD_KILL		BIT(13)
 #define VSC73XX_MACACCESS_IGNORE_VLAN		BIT(12)
@@ -623,9 +627,6 @@ static int vsc73xx_setup(struct dsa_switch *ds)
 	vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GMIIDELAY,
 		      VSC73XX_GMIIDELAY_GMII0_GTXDELAY_2_0_NS |
 		      VSC73XX_GMIIDELAY_GMII0_RXDELAY_2_0_NS);
-	/* Enable reception of frames on all ports */
-	vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_RECVMASK,
-		      0x5f);
 	/* IP multicast flood mask (table 144) */
 	vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_IFLODMSK,
 		      0xff);
@@ -785,10 +786,6 @@ static void vsc73xx_phylink_mac_link_down(struct dsa_switch *ds, int port,
 	/* Allow backward dropping of frames from this port */
 	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
 			    VSC73XX_SBACKWDROP, BIT(port), BIT(port));
-
-	/* Receive mask (disable forwarding) */
-	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
-			    VSC73XX_RECVMASK, BIT(port), 0);
 }
 
 static void vsc73xx_phylink_mac_link_up(struct dsa_switch *ds, int port,
@@ -841,10 +838,6 @@ static void vsc73xx_phylink_mac_link_up(struct dsa_switch *ds, int port,
 	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
 			    VSC73XX_ARBDISC, BIT(port), 0);
 
-	/* Enable port (forwarding) in the receieve mask */
-	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
-			    VSC73XX_RECVMASK, BIT(port), BIT(port));
-
 	/* Disallow backward dropping of frames from this port */
 	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0,
 			    VSC73XX_SBACKWDROP, BIT(port), 0);
@@ -1036,6 +1029,89 @@ static void vsc73xx_phylink_get_caps(struct dsa_switch *dsa, int port,
 	config->mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000;
 }
 
+static void vsc73xx_refresh_fwd_map(struct dsa_switch *ds, int port, u8 state)
+{
+	struct dsa_port *other_dp, *dp = dsa_to_port(ds, port);
+	struct vsc73xx *vsc = ds->priv;
+	u16 mask;
+
+	if (state != BR_STATE_FORWARDING) {
+		/* Ports that aren't in the forwarding state must not
+		 * forward packets anywhere.
+		 */
+		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+				    VSC73XX_SRCMASKS + port,
+				    VSC73XX_SRCMASKS_PORTS_MASK, 0);
+
+		dsa_switch_for_each_available_port(other_dp, ds) {
+			if (other_dp == dp)
+				continue;
+			vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+					    VSC73XX_SRCMASKS + other_dp->index,
+					    BIT(port), 0);
+		}
+
+	return;
+	}
+
+	/* Forwarding ports must forward to the CPU and to other ports
+	 * in the same bridge
+	 */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+			    VSC73XX_SRCMASKS + CPU_PORT, BIT(port), BIT(port));
+
+	mask = BIT(CPU_PORT);
+
+	if (dp->bridge) {
+		dsa_switch_for_each_user_port(other_dp, ds) {
+			if (other_dp->bridge == dp->bridge &&
+			    other_dp->index != port &&
+			    other_dp->stp_state == BR_STATE_FORWARDING) {
+				int other_port = other_dp->index;
+
+				mask |= BIT(other_port);
+				vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER,
+						    0,
+						    VSC73XX_SRCMASKS +
+						    other_port,
+						    BIT(port), BIT(port));
+			}
+		}
+	}
+
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+			    VSC73XX_SRCMASKS + port,
+			    VSC73XX_SRCMASKS_PORTS_MASK, mask);
+}
+
+/* FIXME: STP frames aren't forwarded at this moment. BPDU frames are
+ * forwarded only from and to PI/SI interface. For more info see chapter
+ * 2.7.1 (CPU Forwarding) in datasheet.
+ * This function is required for tag_8021q operations.
+ */
+static void vsc73xx_port_stp_state_set(struct dsa_switch *ds, int port,
+				       u8 state)
+{
+	struct vsc73xx *vsc = ds->priv;
+	u32 val;
+
+	val = (state == BR_STATE_BLOCKING || state == BR_STATE_DISABLED) ?
+	      0 : BIT(port);
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+			    VSC73XX_RECVMASK, BIT(port), val);
+
+	val = (state == BR_STATE_LEARNING || state == BR_STATE_FORWARDING) ?
+	      BIT(port) : 0;
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+			    VSC73XX_LEARNMASK, BIT(port), val);
+
+	/* CPU Port should always forward packets when user ports are forwarding
+	 * so let's configure it from other ports only.
+	 */
+	if (port != CPU_PORT)
+		vsc73xx_refresh_fwd_map(ds, port, state);
+}
+
 static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.get_tag_protocol = vsc73xx_get_tag_protocol,
 	.setup = vsc73xx_setup,
@@ -1051,6 +1127,7 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.port_disable = vsc73xx_port_disable,
 	.port_change_mtu = vsc73xx_change_mtu,
 	.port_max_mtu = vsc73xx_get_max_mtu,
+	.port_stp_state_set = vsc73xx_port_stp_state_set,
 	.phylink_get_caps = vsc73xx_phylink_get_caps,
 };
 
-- 
2.34.1

[PATCH net-next v5 07/16] net: dsa: vsc73xx: Add vlan filtering

[Pawel Dembicki]

This patch implements VLAN filtering for the vsc73xx driver.

After starting VLAN filtering, the switch is reconfigured from QinQ to
a simple VLAN aware mode. This is required because VSC73XX chips do not
support inner VLAN tag filtering.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - fix possible leak in 'vsc73xx_port_vlan_add'
  - use proper variable in statement from 'vsc73xx_port_vlan_filtering'
  - change 'vlan_no' name to 'vid'
  - codding style improvements
  - comment improvements
  - handle return of 'vsc73xx_update_bits'
  - reduce I/O operations
  - use 'size_t' for counting variables
v4:
  - reworked most of conditional register configs
  - simplified port_vlan function
  - move vlan table clearing from port_setup to setup
  - pvid configuration simplified (now kernel take care about no of
    pvids per port)
  - port vlans are stored in list now
  - introduce implementation of all untagged vlans state
  - many minor changes
v3:
  - reworked all vlan commits
  - added storage variables for pvid and untagged vlans
  - move length extender settings to port setup
  - remove vlan table cleaning in wrong places
v2:
  - no changes done

 drivers/net/dsa/vitesse-vsc73xx-core.c | 570 ++++++++++++++++++++++++-
 drivers/net/dsa/vitesse-vsc73xx.h      |  29 ++
 2 files changed, 597 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index c3ef4c22f687..87ad8b78f141 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -22,9 +22,11 @@
 #include <linux/of_mdio.h>
 #include <linux/bitops.h>
 #include <linux/if_bridge.h>
+#include <linux/if_vlan.h>
 #include <linux/etherdevice.h>
 #include <linux/gpio/consumer.h>
 #include <linux/gpio/driver.h>
+#include <linux/dsa/8021q.h>
 #include <linux/random.h>
 #include <net/dsa.h>
 
@@ -62,6 +64,8 @@
 #define VSC73XX_CAT_DROP	0x6e
 #define VSC73XX_CAT_PR_MISC_L2	0x6f
 #define VSC73XX_CAT_PR_USR_PRIO	0x75
+#define VSC73XX_CAT_VLAN_MISC	0x79
+#define VSC73XX_CAT_PORT_VLAN	0x7a
 #define VSC73XX_Q_MISC_CONF	0xdf
 
 /* MAC_CFG register bits */
@@ -122,6 +126,17 @@
 #define VSC73XX_ADVPORTM_IO_LOOPBACK	BIT(1)
 #define VSC73XX_ADVPORTM_HOST_LOOPBACK	BIT(0)
 
+/*  TXUPDCFG transmit modify setup bits */
+#define VSC73XX_TXUPDCFG_DSCP_REWR_MODE	GENMASK(20, 19)
+#define VSC73XX_TXUPDCFG_DSCP_REWR_ENA	BIT(18)
+#define VSC73XX_TXUPDCFG_TX_INT_TO_USRPRIO_ENA	BIT(17)
+#define VSC73XX_TXUPDCFG_TX_UNTAGGED_VID	GENMASK(15, 4)
+#define VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_ENA	BIT(3)
+#define VSC73XX_TXUPDCFG_TX_UPDATE_CRC_CPU_ENA	BIT(1)
+#define VSC73XX_TXUPDCFG_TX_INSERT_TAG	BIT(0)
+
+#define VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_SHIFT	4
+
 /* CAT_DROP categorizer frame dropping register bits */
 #define VSC73XX_CAT_DROP_DROP_MC_SMAC_ENA	BIT(6)
 #define VSC73XX_CAT_DROP_FWD_CTRL_ENA		BIT(4)
@@ -135,6 +150,15 @@
 #define VSC73XX_Q_MISC_CONF_EARLY_TX_512	(1 << 1)
 #define VSC73XX_Q_MISC_CONF_MAC_PAUSE_MODE	BIT(0)
 
+/* CAT_VLAN_MISC categorizer VLAN miscellaneous bits */
+#define VSC73XX_CAT_VLAN_MISC_VLAN_TCI_IGNORE_ENA BIT(8)
+#define VSC73XX_CAT_VLAN_MISC_VLAN_KEEP_TAG_ENA BIT(7)
+
+/* CAT_PORT_VLAN categorizer port VLAN */
+#define VSC73XX_CAT_PORT_VLAN_VLAN_CFI BIT(15)
+#define VSC73XX_CAT_PORT_VLAN_VLAN_USR_PRIO GENMASK(14, 12)
+#define VSC73XX_CAT_PORT_VLAN_VLAN_VID GENMASK(11, 0)
+
 /* Frame analyzer block 2 registers */
 #define VSC73XX_STORMLIMIT	0x02
 #define VSC73XX_ADVLEARN	0x03
@@ -189,7 +213,8 @@
 #define VSC73XX_VLANACCESS_VLAN_MIRROR		BIT(29)
 #define VSC73XX_VLANACCESS_VLAN_SRC_CHECK	BIT(28)
 #define VSC73XX_VLANACCESS_VLAN_PORT_MASK	GENMASK(9, 2)
-#define VSC73XX_VLANACCESS_VLAN_TBL_CMD_MASK	GENMASK(2, 0)
+#define VSC73XX_VLANACCESS_VLAN_PORT_MASK_SHIFT	2
+#define VSC73XX_VLANACCESS_VLAN_TBL_CMD_MASK	GENMASK(1, 0)
 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_IDLE	0
 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_READ_ENTRY	1
 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_WRITE_ENTRY	2
@@ -347,6 +372,12 @@ static const struct vsc73xx_counter vsc73xx_tx_counters[] = {
 	{ 29, "TxQoSClass3" }, /* non-standard counter */
 };
 
+enum vsc73xx_port_vlan_conf {
+	VSC73XX_VLAN_FILTER,
+	VSC73XX_VLAN_FILTER_UNTAG_ALL,
+	VSC73XX_VLAN_IGNORE,
+};
+
 int vsc73xx_is_addr_valid(u8 block, u8 subblock)
 {
 	switch (block) {
@@ -564,6 +595,91 @@ static enum dsa_tag_protocol vsc73xx_get_tag_protocol(struct dsa_switch *ds,
 	return DSA_TAG_PROTO_NONE;
 }
 
+static int vsc73xx_wait_for_vlan_table_cmd(struct vsc73xx *vsc)
+{
+	int ret, err;
+	u32 val;
+
+	ret = read_poll_timeout(vsc73xx_read, err,
+				err < 0 ||
+				((val & VSC73XX_VLANACCESS_VLAN_TBL_CMD_MASK) ==
+				VSC73XX_VLANACCESS_VLAN_TBL_CMD_IDLE),
+				VSC73XX_POLL_SLEEP_US, VSC73XX_POLL_TIMEOUT_US,
+				false, vsc, VSC73XX_BLOCK_ANALYZER,
+				0, VSC73XX_VLANACCESS, &val);
+	if (ret)
+		return ret;
+	return err;
+}
+
+static int
+vsc73xx_read_vlan_table_entry(struct vsc73xx *vsc, u16 vid, u8 *portmap)
+{
+	u32 val;
+	int ret;
+
+	vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_VLANTIDX, vid);
+
+	ret = vsc73xx_wait_for_vlan_table_cmd(vsc);
+	if (ret)
+		return ret;
+
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_VLANACCESS,
+			    VSC73XX_VLANACCESS_VLAN_TBL_CMD_MASK,
+			    VSC73XX_VLANACCESS_VLAN_TBL_CMD_READ_ENTRY);
+
+	ret = vsc73xx_wait_for_vlan_table_cmd(vsc);
+	if (ret)
+		return ret;
+
+	vsc73xx_read(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_VLANACCESS, &val);
+	*portmap = (val & VSC73XX_VLANACCESS_VLAN_PORT_MASK) >>
+		   VSC73XX_VLANACCESS_VLAN_PORT_MASK_SHIFT;
+
+	return 0;
+}
+
+static int
+vsc73xx_write_vlan_table_entry(struct vsc73xx *vsc, u16 vid, u8 portmap)
+{
+	int ret;
+
+	vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_VLANTIDX, vid);
+
+	ret = vsc73xx_wait_for_vlan_table_cmd(vsc);
+	if (ret)
+		return ret;
+
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_VLANACCESS,
+			    VSC73XX_VLANACCESS_VLAN_TBL_CMD_MASK |
+			    VSC73XX_VLANACCESS_VLAN_SRC_CHECK |
+			    VSC73XX_VLANACCESS_VLAN_PORT_MASK,
+			    VSC73XX_VLANACCESS_VLAN_TBL_CMD_WRITE_ENTRY |
+			    VSC73XX_VLANACCESS_VLAN_SRC_CHECK |
+			    (portmap << VSC73XX_VLANACCESS_VLAN_PORT_MASK_SHIFT)
+			    );
+
+	return vsc73xx_wait_for_vlan_table_cmd(vsc);
+}
+
+static int
+vsc73xx_update_vlan_table(struct vsc73xx *vsc, int port, u16 vid, bool set)
+{
+	u8 portmap;
+	int ret;
+
+	ret = vsc73xx_read_vlan_table_entry(vsc, vid, &portmap);
+	if (ret)
+		return ret;
+
+	if (set)
+		portmap |= BIT(port);
+	else
+		portmap &= ~BIT(port);
+
+	return vsc73xx_write_vlan_table_entry(vsc, vid, portmap);
+}
+
 static int vsc73xx_setup(struct dsa_switch *ds)
 {
 	struct vsc73xx *vsc = ds->priv;
@@ -598,7 +714,7 @@ static int vsc73xx_setup(struct dsa_switch *ds)
 		      VSC73XX_MACACCESS,
 		      VSC73XX_MACACCESS_CMD_CLEAR_TABLE);
 
-	/* Clear VLAN table */
+	/* Set VLAN table to default values */
 	vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0,
 		      VSC73XX_VLANACCESS,
 		      VSC73XX_VLANACCESS_VLAN_TBL_CMD_CLEAR_TABLE);
@@ -627,6 +743,9 @@ static int vsc73xx_setup(struct dsa_switch *ds)
 	vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GMIIDELAY,
 		      VSC73XX_GMIIDELAY_GMII0_GTXDELAY_2_0_NS |
 		      VSC73XX_GMIIDELAY_GMII0_RXDELAY_2_0_NS);
+	/* Ingess VLAN reception mask (table 145) */
+	vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_VLANMASK,
+		      0x5f);
 	/* IP multicast flood mask (table 144) */
 	vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_IFLODMSK,
 		      0xff);
@@ -639,6 +758,12 @@ static int vsc73xx_setup(struct dsa_switch *ds)
 
 	udelay(4);
 
+	/* Clear VLAN table */
+	for (i = 0; i < VLAN_N_VID; i++)
+		vsc73xx_write_vlan_table_entry(vsc, i, 0);
+
+	INIT_LIST_HEAD(&vsc->vlans);
+
 	return 0;
 }
 
@@ -1029,6 +1154,443 @@ static void vsc73xx_phylink_get_caps(struct dsa_switch *dsa, int port,
 	config->mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000;
 }
 
+static void
+vsc73xx_set_vlan_conf(struct vsc73xx *vsc, int port,
+		      enum vsc73xx_port_vlan_conf port_vlan_conf)
+{
+	u32 val = 0;
+
+	if (port_vlan_conf == VSC73XX_VLAN_IGNORE)
+		val = VSC73XX_CAT_VLAN_MISC_VLAN_TCI_IGNORE_ENA |
+		      VSC73XX_CAT_VLAN_MISC_VLAN_KEEP_TAG_ENA;
+
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_CAT_VLAN_MISC,
+			    VSC73XX_CAT_VLAN_MISC_VLAN_TCI_IGNORE_ENA |
+			    VSC73XX_CAT_VLAN_MISC_VLAN_KEEP_TAG_ENA, val);
+
+	val = (port_vlan_conf == VSC73XX_VLAN_FILTER) ?
+	      VSC73XX_TXUPDCFG_TX_INSERT_TAG : 0;
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_TXUPDCFG,
+			    VSC73XX_TXUPDCFG_TX_INSERT_TAG, val);
+}
+
+static int
+vsc73xx_vlan_change_untagged(struct vsc73xx *vsc, int port, u16 vid, bool set,
+			     bool operate_on_storage)
+{
+	u32 val = 0;
+
+	if (operate_on_storage) {
+		vsc->untagged_storage[port] = set ? vid : VLAN_N_VID;
+		return 0;
+	}
+
+	if (set)
+		val = VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_ENA |
+		      ((vid << VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_SHIFT) &
+		       VSC73XX_TXUPDCFG_TX_UNTAGGED_VID);
+
+	return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port,
+				   VSC73XX_TXUPDCFG,
+				   VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_ENA |
+				   VSC73XX_TXUPDCFG_TX_UNTAGGED_VID, val);
+}
+
+static int vsc73xx_vlan_change_pvid(struct vsc73xx *vsc, int port, u16 vid,
+				    bool set, bool operate_on_storage)
+{
+	int ret;
+	u32 val;
+
+	if (operate_on_storage) {
+		vsc->pvid_storage[port] = set ? vid : VLAN_N_VID;
+		return 0;
+	}
+
+	val = set ? 0 : VSC73XX_CAT_DROP_UNTAGGED_ENA;
+	vid = set ? vid : 0;
+
+	ret = vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port,
+				  VSC73XX_CAT_DROP,
+				  VSC73XX_CAT_DROP_UNTAGGED_ENA, val);
+	if (ret)
+		return ret;
+
+	return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port,
+				   VSC73XX_CAT_PORT_VLAN,
+				   VSC73XX_CAT_PORT_VLAN_VLAN_VID,
+				   vid & VSC73XX_CAT_PORT_VLAN_VLAN_VID);
+}
+
+static bool vsc73xx_port_get_pvid(struct vsc73xx *vsc, int port, u16 *vid,
+				  bool operate_on_storage)
+{
+	u32 val;
+
+	if (operate_on_storage) {
+		if (vsc->pvid_storage[port] < VLAN_N_VID) {
+			*vid = vsc->pvid_storage[port];
+			return true;
+		}
+		return false;
+	}
+
+	vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_CAT_DROP, &val);
+	if (val & VSC73XX_CAT_DROP_UNTAGGED_ENA)
+		return false;
+
+	vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_CAT_PORT_VLAN, &val);
+	*vid = val & VSC73XX_CAT_PORT_VLAN_VLAN_VID;
+
+	return true;
+}
+
+static bool vsc73xx_tag_8021q_active(struct dsa_port *dp)
+{
+	return !dsa_port_is_vlan_filtering(dp);
+}
+
+static bool vsc73xx_port_get_untagged(struct vsc73xx *vsc, int port, u16 *vid,
+				      bool operate_on_storage)
+{
+	u32 val;
+
+	if (operate_on_storage) {
+		if (vsc->untagged_storage[port] < VLAN_N_VID) {
+			*vid = vsc->untagged_storage[port];
+			return true;
+		}
+		return false;
+	}
+
+	vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_TXUPDCFG, &val);
+	if (!(val & VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_ENA))
+		return false;
+
+	*vid = (val & VSC73XX_TXUPDCFG_TX_UNTAGGED_VID) >>
+		VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_SHIFT;
+
+	return true;
+}
+
+static struct vsc73xx_bridge_vlan *
+vsc73xx_bridge_vlan_find(struct vsc73xx *vsc, u16 vid)
+{
+	struct vsc73xx_bridge_vlan *vlan;
+
+	list_for_each_entry(vlan, &vsc->vlans, list)
+		if (vlan->vid == vid)
+			return vlan;
+
+	return NULL;
+}
+
+static size_t
+vsc73xx_bridge_vlan_num_tagged(struct vsc73xx *vsc, int port, u16 ignored_vid)
+{
+	struct vsc73xx_bridge_vlan *vlan;
+	size_t num_tagged = 0;
+
+	list_for_each_entry(vlan, &vsc->vlans, list)
+		if ((vlan->portmask & BIT(port)) &&
+		    !(vlan->untagged & BIT(port)) &&
+		    vlan->vid != ignored_vid)
+			num_tagged++;
+
+	return num_tagged;
+}
+
+static size_t
+vsc73xx_bridge_vlan_num_untagged(struct vsc73xx *vsc, int port, u16 ignored_vid)
+{
+	struct vsc73xx_bridge_vlan *vlan;
+	size_t num_untagged = 0;
+
+	list_for_each_entry(vlan, &vsc->vlans, list)
+		if ((vlan->portmask & BIT(port)) &&
+		    (vlan->untagged & BIT(port)) &&
+		    vlan->vid != ignored_vid)
+			num_untagged++;
+
+	return num_untagged;
+}
+
+static u16 vsc73xx_find_first_vlan_untagged(struct vsc73xx *vsc, int port)
+{
+	struct vsc73xx_bridge_vlan *vlan;
+
+	list_for_each_entry(vlan, &vsc->vlans, list)
+		if ((vlan->portmask & BIT(port)) &&
+		    (vlan->untagged & BIT(port)))
+			return vlan->vid;
+
+	return VLAN_N_VID;
+}
+
+static int
+vsc73xx_port_vlan_filtering(struct dsa_switch *ds, int port,
+			    bool vlan_filtering, struct netlink_ext_ack *extack)
+{
+	enum vsc73xx_port_vlan_conf port_vlan_conf = VSC73XX_VLAN_IGNORE;
+	struct vsc73xx *vsc = ds->priv;
+	bool store_untagged = false;
+	bool store_pvid = false;
+	u16 vid, vlan_untagged;
+
+	/* The swap processed below is required because vsc73xx is using
+	 * tag_8021q. When vlan_filtering is disabled, tag_8021q uses
+	 * pvid/untagged vlans for port recognition. The values configured for
+	 * vlans < 3072 are stored in storage table. When vlan_filtering is
+	 * enabled, we need to restore pvid/untagged from storage and keep
+	 * values used for tag_8021q.
+	 */
+	if (vlan_filtering) {
+		/* Use VLAN_N_VID to count all vlans */
+		size_t num_untagged =
+			vsc73xx_bridge_vlan_num_untagged(vsc, port, VLAN_N_VID);
+
+		port_vlan_conf = (num_untagged > 1) ?
+				 VSC73XX_VLAN_FILTER_UNTAG_ALL :
+				 VSC73XX_VLAN_FILTER;
+
+		vlan_untagged = vsc73xx_find_first_vlan_untagged(vsc, port);
+		if (vlan_untagged < VLAN_N_VID) {
+			store_untagged  = vsc73xx_port_get_untagged(vsc, port,
+								    &vid,
+								    false);
+			vsc73xx_vlan_change_untagged(vsc, port, vlan_untagged,
+						     true, false);
+			vsc->untagged_storage[port] = store_untagged ?
+						      vid : VLAN_N_VID;
+		}
+	} else {
+		vsc73xx_vlan_change_untagged(vsc, port,
+					     vsc->untagged_storage[port],
+					     vsc->untagged_storage[port] <
+					     VLAN_N_VID, false);
+	}
+
+	vsc73xx_set_vlan_conf(vsc, port, port_vlan_conf);
+
+	store_pvid = vsc73xx_port_get_pvid(vsc, port, &vid, false);
+	vsc73xx_vlan_change_pvid(vsc, port, vsc->pvid_storage[port],
+				 vsc->pvid_storage[port] < VLAN_N_VID, false);
+	vsc->pvid_storage[port] = store_pvid ? vid : VLAN_N_VID;
+
+	return 0;
+}
+
+static int vsc73xx_port_vlan_add(struct dsa_switch *ds, int port,
+				 const struct switchdev_obj_port_vlan *vlan,
+				 struct netlink_ext_ack *extack)
+{
+	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
+	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
+	struct dsa_port *dp = dsa_to_port(ds, port);
+	struct vsc73xx_bridge_vlan *vsc73xx_vlan;
+	size_t num_tagged, num_untagged;
+	struct vsc73xx *vsc = ds->priv;
+	int ret;
+	u16 vid;
+
+	/* Be sure to deny alterations to the configuration done by tag_8021q.
+	 */
+	if (vid_is_dsa_8021q(vlan->vid)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Range 3072-4095 reserved for dsa_8021q operation");
+		return -EBUSY;
+	}
+
+	/* The processed vlan->vid is excluded from the search because the VLAN
+	 * can be re-added with a different set of flags, so it's easiest to
+	 * ignore its old flags from the VLAN database software copy.
+	 */
+	num_tagged = vsc73xx_bridge_vlan_num_tagged(vsc, port, vlan->vid);
+	num_untagged = vsc73xx_bridge_vlan_num_untagged(vsc, port, vlan->vid);
+
+	/* VSC73XX allow only three untagged states: none, one or all */
+	if ((untagged && num_tagged > 0 && num_untagged > 0) ||
+	    (!untagged && num_untagged > 1)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Port can have only none, one or all untagged vlan");
+		return -EBUSY;
+	}
+
+	vsc73xx_vlan = vsc73xx_bridge_vlan_find(vsc, vlan->vid);
+
+	if (!vsc73xx_vlan) {
+		vsc73xx_vlan = kzalloc(sizeof(*vsc73xx_vlan), GFP_KERNEL);
+		if (!vsc73xx_vlan)
+			return -ENOMEM;
+
+		vsc73xx_vlan->vid = vlan->vid;
+		vsc73xx_vlan->portmask = BIT(port);
+		vsc73xx_vlan->untagged = untagged ? BIT(port) : 0;
+
+		INIT_LIST_HEAD(&vsc73xx_vlan->list);
+		list_add_tail(&vsc73xx_vlan->list, &vsc->vlans);
+	} else {
+		vsc73xx_vlan->portmask |= BIT(port);
+
+		if (untagged)
+			vsc73xx_vlan->untagged |= BIT(port);
+		else
+			vsc73xx_vlan->untagged &= ~BIT(port);
+	}
+
+	/* CPU port must be always tagged because port separation is based on
+	 * tag_8021q.
+	 */
+	if (port != CPU_PORT) {
+		bool operate_on_storage = vsc73xx_tag_8021q_active(dp);
+
+		if (!operate_on_storage) {
+			enum vsc73xx_port_vlan_conf port_vlan_conf =
+							VSC73XX_VLAN_FILTER;
+
+			if (num_tagged == 0 && untagged)
+				port_vlan_conf = VSC73XX_VLAN_FILTER_UNTAG_ALL;
+			vsc73xx_set_vlan_conf(vsc, port, port_vlan_conf);
+
+			if (port_vlan_conf == VSC73XX_VLAN_FILTER) {
+				if (untagged) {
+					ret = vsc73xx_vlan_change_untagged(vsc,
+									   port,
+									   vlan->vid,
+									   true,
+									   false);
+					if (ret)
+						goto err;
+				} else if (num_untagged == 1) {
+					vid = vsc73xx_find_first_vlan_untagged(vsc,
+									       port);
+					ret = vsc73xx_vlan_change_untagged(vsc,
+									   port,
+									   vid,
+									   true,
+									   false);
+					if (ret)
+						goto err;
+				}
+			}
+		}
+
+		if (pvid) {
+			ret = vsc73xx_vlan_change_pvid(vsc, port, vlan->vid,
+						       true,
+						       operate_on_storage);
+			if (ret)
+				goto err;
+		} else if (vsc73xx_port_get_pvid(vsc, port, &vid, false) &&
+			   vid == vlan->vid) {
+			vsc73xx_vlan_change_pvid(vsc, port, 0, false, false);
+		} else if (vsc->pvid_storage[port] == vlan->vid) {
+			vsc73xx_vlan_change_pvid(vsc, port, 0, false, true);
+		}
+	}
+
+	ret = vsc73xx_update_vlan_table(vsc, port, vlan->vid, true);
+	if (!ret)
+		return 0;
+err:
+	list_del(&vsc73xx_vlan->list);
+	kfree(vsc73xx_vlan);
+	return ret;
+}
+
+static int vsc73xx_port_vlan_del(struct dsa_switch *ds, int port,
+				 const struct switchdev_obj_port_vlan *vlan)
+{
+	struct vsc73xx_bridge_vlan *vsc73xx_vlan;
+	size_t num_tagged, num_untagged;
+	struct vsc73xx *vsc = ds->priv;
+	bool operate_on_storage;
+	int ret;
+	u16 vid;
+
+	num_tagged = vsc73xx_bridge_vlan_num_tagged(vsc, port, vlan->vid);
+	num_untagged = vsc73xx_bridge_vlan_num_untagged(vsc, port, vlan->vid);
+
+	ret = vsc73xx_update_vlan_table(vsc, port, vlan->vid, false);
+	if (ret)
+		return ret;
+
+	operate_on_storage = vsc73xx_tag_8021q_active(dsa_to_port(ds, port));
+
+	if (!operate_on_storage) {
+		enum vsc73xx_port_vlan_conf port_vlan_conf =
+							VSC73XX_VLAN_FILTER;
+
+		if (num_tagged == 0)
+			port_vlan_conf = VSC73XX_VLAN_FILTER_UNTAG_ALL;
+		vsc73xx_set_vlan_conf(vsc, port, port_vlan_conf);
+
+		if (num_untagged <= 1) {
+			vid = vsc73xx_find_first_vlan_untagged(vsc, port);
+			vsc73xx_vlan_change_untagged(vsc, port, vid,
+						     num_untagged, false);
+		}
+	} else if (vsc->untagged_storage[port] == vlan->vid) {
+		vsc73xx_vlan_change_untagged(vsc, port, 0, false, true);
+	}
+
+	if (vsc73xx_port_get_pvid(vsc, port, &vid, false) && vid == vlan->vid)
+		vsc73xx_vlan_change_pvid(vsc, port, 0, false, false);
+	else if (vsc->pvid_storage[port] == vlan->vid)
+		vsc73xx_vlan_change_pvid(vsc, port, 0, false, true);
+
+	vsc73xx_vlan = vsc73xx_bridge_vlan_find(vsc, vlan->vid);
+
+	if (vsc73xx_vlan) {
+		vsc73xx_vlan->portmask &= ~BIT(port);
+
+		if (vsc73xx_vlan->portmask)
+			return 0;
+
+		list_del(&vsc73xx_vlan->list);
+		kfree(vsc73xx_vlan);
+	}
+
+	return 0;
+}
+
+static int vsc73xx_port_setup(struct dsa_switch *ds, int port)
+{
+	struct vsc73xx *vsc = ds->priv;
+
+	/* Those bits are responsible for MTU only. Kernel take care about MTU,
+	 * let's enable +8 bytes frame length unconditionally.
+	 */
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG,
+			    VSC73XX_MAC_CFG_VLAN_AWR |
+			    VSC73XX_MAC_CFG_VLAN_DBLAWR,
+			    VSC73XX_MAC_CFG_VLAN_AWR |
+			    VSC73XX_MAC_CFG_VLAN_DBLAWR);
+
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_CAT_DROP,
+			    VSC73XX_CAT_DROP_TAGGED_ENA |
+			    VSC73XX_CAT_DROP_UNTAGGED_ENA,
+			    VSC73XX_CAT_DROP_UNTAGGED_ENA);
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_TXUPDCFG,
+			    VSC73XX_TXUPDCFG_TX_UNTAGGED_VID_ENA |
+			    VSC73XX_TXUPDCFG_TX_UNTAGGED_VID, 0);
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_CAT_PORT_VLAN,
+			    VSC73XX_CAT_PORT_VLAN_VLAN_VID, 0);
+
+	if (port == CPU_PORT)
+		vsc73xx_set_vlan_conf(vsc, port, VSC73XX_VLAN_FILTER);
+	else
+		vsc73xx_set_vlan_conf(vsc, port, VSC73XX_VLAN_IGNORE);
+
+	/* Initially, there is no backup VLAN configuration to keep track of, so
+	 * configure the storage values out of range
+	 */
+	vsc->pvid_storage[port] = VLAN_N_VID;
+	vsc->untagged_storage[port] = VLAN_N_VID;
+
+	return 0;
+}
+
 static void vsc73xx_refresh_fwd_map(struct dsa_switch *ds, int port, u8 state)
 {
 	struct dsa_port *other_dp, *dp = dsa_to_port(ds, port);
@@ -1123,11 +1685,15 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.get_strings = vsc73xx_get_strings,
 	.get_ethtool_stats = vsc73xx_get_ethtool_stats,
 	.get_sset_count = vsc73xx_get_sset_count,
+	.port_setup = vsc73xx_port_setup,
 	.port_enable = vsc73xx_port_enable,
 	.port_disable = vsc73xx_port_disable,
 	.port_change_mtu = vsc73xx_change_mtu,
 	.port_max_mtu = vsc73xx_get_max_mtu,
 	.port_stp_state_set = vsc73xx_port_stp_state_set,
+	.port_vlan_filtering = vsc73xx_port_vlan_filtering,
+	.port_vlan_add = vsc73xx_port_vlan_add,
+	.port_vlan_del = vsc73xx_port_vlan_del,
 	.phylink_get_caps = vsc73xx_phylink_get_caps,
 };
 
diff --git a/drivers/net/dsa/vitesse-vsc73xx.h b/drivers/net/dsa/vitesse-vsc73xx.h
index e7b08599a625..facc50f1e320 100644
--- a/drivers/net/dsa/vitesse-vsc73xx.h
+++ b/drivers/net/dsa/vitesse-vsc73xx.h
@@ -25,6 +25,17 @@
  * @addr: MAC address used in flow control frames
  * @ops: Structure with hardware-dependent operations
  * @priv: Pointer to the configuration interface structure
+ * @pvid_storage: Storage table with PVID configured for other state of
+ *	vlan_filtering. It has two alternating roles: it stores the PVID when
+ *	configured by the bridge but VLAN filtering is off, and it stores the
+ *	PVID necessary for tag_8021q operation when bridge VLAN filtering is
+ *	enabled.
+ * @untagged_storage: Storage table with eggres untagged VLAN configured for
+ *	other state of vlan_filtering.Keep VID necessary for tag8021q operations
+ *	when vlan filtering is enabled.
+ * @vlans: List of configured vlans. Contains port mask and untagged status of
+ *	every vlan configured in port vlan operation. It doesn't cover tag_8021q
+ *	vlans.
  */
 struct vsc73xx {
 	struct device			*dev;
@@ -35,6 +46,9 @@ struct vsc73xx {
 	u8				addr[ETH_ALEN];
 	const struct vsc73xx_ops	*ops;
 	void				*priv;
+	u16				pvid_storage[VSC73XX_MAX_NUM_PORTS];
+	u16				untagged_storage[VSC73XX_MAX_NUM_PORTS];
+	struct list_head		vlans;
 };
 
 /**
@@ -49,6 +63,21 @@ struct vsc73xx_ops {
 		     u32 val);
 };
 
+/**
+ * struct vsc73xx_bridge_vlan - VSC73xx driver structure which keeps vlan
+ *	database copy
+ * @vid: VLAN number
+ * @portmask: each bit represends one port
+ * @untagged: each bit represends one port configured with @vid untagged
+ * @list: list structure
+ */
+struct vsc73xx_bridge_vlan {
+	u16 vid;
+	u8 portmask;
+	u8 untagged;
+	struct list_head list;
+};
+
 int vsc73xx_is_addr_valid(u8 block, u8 subblock);
 int vsc73xx_probe(struct vsc73xx *vsc);
 void vsc73xx_remove(struct vsc73xx *vsc);
-- 
2.34.1

[PATCH net-next v5 08/16] net: dsa: tag_sja1105: absorb logic for not overwriting precise info into dsa_8021q_rcv()

[Pawel Dembicki]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

In both sja1105_rcv() and sja1110_rcv(), we may have precise source port
information coming from parallel hardware mechanisms, in addition to the
tag_8021q header.

Only sja1105_rcv() has extra logic to not overwrite that precise info
with what's present in the VLAN tag. This is because sja1110_rcv() gets
by, by having a reversed set of checks when assigning skb->dev. When the
source port is imprecise (vbid >=1), source_port and switch_id will be
set to zeroes by dsa_8021q_rcv(), which might be problematic. But by
checking for vbid >= 1 first, sja1110_rcv() fends that off.

We would like to make more code common between sja1105_rcv() and
sja1110_rcv(), and for that, we need to make sure that sja1110_rcv()
also goes through the precise source port preservation logic.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - add missing SoB
v4:
  - introduced patch

 net/dsa/tag_8021q.c   | 32 +++++++++++++++++++++++++++++---
 net/dsa/tag_sja1105.c | 23 +++--------------------
 2 files changed, 32 insertions(+), 23 deletions(-)

diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c
index 71b26ae6db39..3cb0293793a5 100644
--- a/net/dsa/tag_8021q.c
+++ b/net/dsa/tag_8021q.c
@@ -497,9 +497,21 @@ struct net_device *dsa_tag_8021q_find_port_by_vbid(struct net_device *conduit,
 }
 EXPORT_SYMBOL_GPL(dsa_tag_8021q_find_port_by_vbid);
 
+/**
+ * dsa_8021q_rcv - Decode source information from tag_8021q header
+ * @skb: RX socket buffer
+ * @source_port: pointer to storage for precise source port information.
+ *	If this is known already from outside tag_8021q, the pre-initialized
+ *	value is preserved. If not known, pass -1.
+ * @switch_id: similar to source_port.
+ * @vbid: pointer to storage for imprecise bridge ID. Must be pre-initialized
+ *	with -1. If a positive value is returned, the source_port and switch_id
+ *	are invalid.
+ */
 void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
 		   int *vbid)
 {
+	int tmp_source_port, tmp_switch_id, tmp_vbid;
 	u16 vid, tci;
 
 	if (skb_vlan_tag_present(skb)) {
@@ -513,11 +525,25 @@ void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
 
 	vid = tci & VLAN_VID_MASK;
 
-	*source_port = dsa_8021q_rx_source_port(vid);
-	*switch_id = dsa_8021q_rx_switch_id(vid);
+	tmp_source_port = dsa_8021q_rx_source_port(vid);
+	tmp_switch_id = dsa_8021q_rx_switch_id(vid);
+	tmp_vbid = dsa_tag_8021q_rx_vbid(vid);
+
+	/* Precise source port information is unknown when receiving from a
+	 * VLAN-unaware bridging domain, and tmp_source_port and tmp_switch_id
+	 * are zeroes in this case.
+	 *
+	 * Preserve the source information from hardware-specific mechanisms,
+	 * if available. This allows us to not overwrite a valid source port
+	 * and switch ID with less precise values.
+	 */
+	if (tmp_vbid == 0 && *source_port == -1)
+		*source_port = tmp_source_port;
+	if (tmp_vbid == 0 && *switch_id == -1)
+		*switch_id = tmp_switch_id;
 
 	if (vbid)
-		*vbid = dsa_tag_8021q_rx_vbid(vid);
+		*vbid = tmp_vbid;
 
 	skb->priority = (tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
 }
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index 1aba1d05c27a..48886d4b7e3e 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -524,30 +524,13 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
 	/* Normal data plane traffic and link-local frames are tagged with
 	 * a tag_8021q VLAN which we have to strip
 	 */
-	if (sja1105_skb_has_tag_8021q(skb)) {
-		int tmp_source_port = -1, tmp_switch_id = -1;
-
-		sja1105_vlan_rcv(skb, &tmp_source_port, &tmp_switch_id, &vbid,
-				 &vid);
-		/* Preserve the source information from the INCL_SRCPT option,
-		 * if available. This allows us to not overwrite a valid source
-		 * port and switch ID with zeroes when receiving link-local
-		 * frames from a VLAN-unaware bridged port (non-zero vbid) or a
-		 * VLAN-aware bridged port (non-zero vid). Furthermore, the
-		 * tag_8021q source port information is only of trust when the
-		 * vbid is 0 (precise port). Otherwise, tmp_source_port and
-		 * tmp_switch_id will be zeroes.
-		 */
-		if (vbid == 0 && source_port == -1)
-			source_port = tmp_source_port;
-		if (vbid == 0 && switch_id == -1)
-			switch_id = tmp_switch_id;
-	} else if (source_port == -1 && switch_id == -1) {
+	if (sja1105_skb_has_tag_8021q(skb))
+		sja1105_vlan_rcv(skb, &source_port, &switch_id, &vbid, &vid);
+	else if (source_port == -1 && switch_id == -1)
 		/* Packets with no source information have no chance of
 		 * getting accepted, drop them straight away.
 		 */
 		return NULL;
-	}
 
 	if (source_port != -1 && switch_id != -1)
 		skb->dev = dsa_conduit_find_user(netdev, switch_id, source_port);
-- 
2.34.1

[PATCH net-next v5 09/16] net: dsa: tag_sja1105: absorb entire sja1105_vlan_rcv() into dsa_8021q_rcv()

[Pawel Dembicki]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

tag_sja1105 has a wrapper over dsa_8021q_rcv(): sja1105_vlan_rcv(),
which determines whether the packet came from a bridge with
vlan_filtering=1 (the case resolved via
dsa_find_designated_bridge_port_by_vid()), or if it contains a tag_8021q
header.

Looking at a new tagger implementation for vsc73xx, based also on
tag_8021q, it is becoming clear that the logic is needed there as well.
So instead of forcing each tagger to wrap around dsa_8021q_rcv(), let's
merge the logic into the core.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - add missing SoB
v4:
  - introduced patch

 net/dsa/tag_8021q.c        | 34 ++++++++++++++++++++++++++++------
 net/dsa/tag_8021q.h        |  2 +-
 net/dsa/tag_ocelot_8021q.c |  2 +-
 net/dsa/tag_sja1105.c      | 32 ++++----------------------------
 4 files changed, 34 insertions(+), 36 deletions(-)

diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c
index 3cb0293793a5..332b0ae02645 100644
--- a/net/dsa/tag_8021q.c
+++ b/net/dsa/tag_8021q.c
@@ -507,27 +507,39 @@ EXPORT_SYMBOL_GPL(dsa_tag_8021q_find_port_by_vbid);
  * @vbid: pointer to storage for imprecise bridge ID. Must be pre-initialized
  *	with -1. If a positive value is returned, the source_port and switch_id
  *	are invalid.
+ * @vid: pointer to storage for original VID, in case tag_8021q decoding failed.
+ *
+ * If the packet has a tag_8021q header, decode it and set @source_port,
+ * @switch_id and @vbid, and strip the header. Otherwise set @vid and keep the
+ * header in the hwaccel area of the packet.
  */
 void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
-		   int *vbid)
+		   int *vbid, int *vid)
 {
 	int tmp_source_port, tmp_switch_id, tmp_vbid;
-	u16 vid, tci;
+	__be16 vlan_proto;
+	u16 tmp_vid, tci;
 
 	if (skb_vlan_tag_present(skb)) {
+		vlan_proto = skb->vlan_proto;
 		tci = skb_vlan_tag_get(skb);
 		__vlan_hwaccel_clear_tag(skb);
 	} else {
+		struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
+
+		vlan_proto = hdr->h_vlan_proto;
 		skb_push_rcsum(skb, ETH_HLEN);
 		__skb_vlan_pop(skb, &tci);
 		skb_pull_rcsum(skb, ETH_HLEN);
 	}
 
-	vid = tci & VLAN_VID_MASK;
+	tmp_vid = tci & VLAN_VID_MASK;
+	if (!vid_is_dsa_8021q(tmp_vid))
+		goto not_tag_8021q;
 
-	tmp_source_port = dsa_8021q_rx_source_port(vid);
-	tmp_switch_id = dsa_8021q_rx_switch_id(vid);
-	tmp_vbid = dsa_tag_8021q_rx_vbid(vid);
+	tmp_source_port = dsa_8021q_rx_source_port(tmp_vid);
+	tmp_switch_id = dsa_8021q_rx_switch_id(tmp_vid);
+	tmp_vbid = dsa_tag_8021q_rx_vbid(tmp_vid);
 
 	/* Precise source port information is unknown when receiving from a
 	 * VLAN-unaware bridging domain, and tmp_source_port and tmp_switch_id
@@ -546,5 +558,15 @@ void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
 		*vbid = tmp_vbid;
 
 	skb->priority = (tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+	return;
+
+not_tag_8021q:
+	if (vid)
+		*vid = tmp_vid;
+	if (vbid)
+		*vbid = -1;
+
+	/* Put the tag back */
+	__vlan_hwaccel_put_tag(skb, vlan_proto, tci);
 }
 EXPORT_SYMBOL_GPL(dsa_8021q_rcv);
diff --git a/net/dsa/tag_8021q.h b/net/dsa/tag_8021q.h
index 41f7167ac520..0c6671d7c1c2 100644
--- a/net/dsa/tag_8021q.h
+++ b/net/dsa/tag_8021q.h
@@ -14,7 +14,7 @@ struct sk_buff *dsa_8021q_xmit(struct sk_buff *skb, struct net_device *netdev,
 			       u16 tpid, u16 tci);
 
 void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
-		   int *vbid);
+		   int *vbid, int *vid);
 
 struct net_device *dsa_tag_8021q_find_port_by_vbid(struct net_device *conduit,
 						   int vbid);
diff --git a/net/dsa/tag_ocelot_8021q.c b/net/dsa/tag_ocelot_8021q.c
index b059381310fe..8e8b1bef6af6 100644
--- a/net/dsa/tag_ocelot_8021q.c
+++ b/net/dsa/tag_ocelot_8021q.c
@@ -81,7 +81,7 @@ static struct sk_buff *ocelot_rcv(struct sk_buff *skb,
 {
 	int src_port, switch_id;
 
-	dsa_8021q_rcv(skb, &src_port, &switch_id, NULL);
+	dsa_8021q_rcv(skb, &src_port, &switch_id, NULL, NULL);
 
 	skb->dev = dsa_conduit_find_user(netdev, switch_id, src_port);
 	if (!skb->dev)
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index 48886d4b7e3e..7639ccb94d35 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -472,37 +472,14 @@ static bool sja1110_skb_has_inband_control_extension(const struct sk_buff *skb)
 	return ntohs(eth_hdr(skb)->h_proto) == ETH_P_SJA1110;
 }
 
-/* If the VLAN in the packet is a tag_8021q one, set @source_port and
- * @switch_id and strip the header. Otherwise set @vid and keep it in the
- * packet.
- */
-static void sja1105_vlan_rcv(struct sk_buff *skb, int *source_port,
-			     int *switch_id, int *vbid, u16 *vid)
-{
-	struct vlan_ethhdr *hdr = vlan_eth_hdr(skb);
-	u16 vlan_tci;
-
-	if (skb_vlan_tag_present(skb))
-		vlan_tci = skb_vlan_tag_get(skb);
-	else
-		vlan_tci = ntohs(hdr->h_vlan_TCI);
-
-	if (vid_is_dsa_8021q(vlan_tci & VLAN_VID_MASK))
-		return dsa_8021q_rcv(skb, source_port, switch_id, vbid);
-
-	/* Try our best with imprecise RX */
-	*vid = vlan_tci & VLAN_VID_MASK;
-}
-
 static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
 				   struct net_device *netdev)
 {
-	int source_port = -1, switch_id = -1, vbid = -1;
+	int source_port = -1, switch_id = -1, vbid = -1, vid = -1;
 	struct sja1105_meta meta = {0};
 	struct ethhdr *hdr;
 	bool is_link_local;
 	bool is_meta;
-	u16 vid;
 
 	hdr = eth_hdr(skb);
 	is_link_local = sja1105_is_link_local(skb);
@@ -525,7 +502,7 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
 	 * a tag_8021q VLAN which we have to strip
 	 */
 	if (sja1105_skb_has_tag_8021q(skb))
-		sja1105_vlan_rcv(skb, &source_port, &switch_id, &vbid, &vid);
+		dsa_8021q_rcv(skb, &source_port, &switch_id, &vbid, &vid);
 	else if (source_port == -1 && switch_id == -1)
 		/* Packets with no source information have no chance of
 		 * getting accepted, drop them straight away.
@@ -660,9 +637,8 @@ static struct sk_buff *sja1110_rcv_inband_control_extension(struct sk_buff *skb,
 static struct sk_buff *sja1110_rcv(struct sk_buff *skb,
 				   struct net_device *netdev)
 {
-	int source_port = -1, switch_id = -1, vbid = -1;
+	int source_port = -1, switch_id = -1, vbid = -1, vid = -1;
 	bool host_only = false;
-	u16 vid = 0;
 
 	if (sja1110_skb_has_inband_control_extension(skb)) {
 		skb = sja1110_rcv_inband_control_extension(skb, &source_port,
@@ -674,7 +650,7 @@ static struct sk_buff *sja1110_rcv(struct sk_buff *skb,
 
 	/* Packets with in-band control extensions might still have RX VLANs */
 	if (likely(sja1105_skb_has_tag_8021q(skb)))
-		sja1105_vlan_rcv(skb, &source_port, &switch_id, &vbid, &vid);
+		dsa_8021q_rcv(skb, &source_port, &switch_id, &vbid, &vid);
 
 	if (vbid >= 1)
 		skb->dev = dsa_tag_8021q_find_port_by_vbid(netdev, vbid);
-- 
2.34.1

[PATCH net-next v5 10/16] net: dsa: tag_sja1105: prefer precise source port info on SJA1110 too

[Pawel Dembicki]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

Now that dsa_8021q_rcv() handles better the case where we don't
overwrite the precise source information if it comes from an external
(non-tag_8021q) source, we can now unify the call sequence between
sja1105_rcv() and sja1110_rcv().

This is a preparatory change for creating a higher-level wrapper for the
entire sequence which will live in tag_8021q.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - resend only
v4:
  - introduce patch and replace 'slave' with 'conduit' after rebase

 net/dsa/tag_sja1105.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index 7639ccb94d35..35a6346549f2 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -652,12 +652,12 @@ static struct sk_buff *sja1110_rcv(struct sk_buff *skb,
 	if (likely(sja1105_skb_has_tag_8021q(skb)))
 		dsa_8021q_rcv(skb, &source_port, &switch_id, &vbid, &vid);
 
-	if (vbid >= 1)
+	if (source_port != -1 && switch_id != -1)
+		skb->dev = dsa_conduit_find_user(netdev, switch_id, source_port);
+	else if (vbid >= 1)
 		skb->dev = dsa_tag_8021q_find_port_by_vbid(netdev, vbid);
-	else if (source_port == -1 || switch_id == -1)
-		skb->dev = dsa_find_designated_bridge_port_by_vid(netdev, vid);
 	else
-		skb->dev = dsa_conduit_find_user(netdev, switch_id, source_port);
+		skb->dev = dsa_find_designated_bridge_port_by_vid(netdev, vid);
 	if (!skb->dev) {
 		netdev_warn(netdev, "Couldn't decode source port\n");
 		return NULL;
-- 
2.34.1

[PATCH net-next v5 11/16] net: dsa: tag_sja1105: refactor skb->dev assignment to dsa_tag_8021q_find_user()

[Pawel Dembicki]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

A new tagging protocol implementation based on tag_8021q is on the
horizon, and it appears that it also has to open-code the complicated
logic of finding a source port based on a VLAN header.

Create a single dsa_tag_8021q_find_user() and make sja1105 call it.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - resend only
v4:
  - introduce patch and change from master to conduit and slave to user

 net/dsa/tag_8021q.c   | 19 ++++++++++++++++---
 net/dsa/tag_8021q.h   |  5 +++--
 net/dsa/tag_sja1105.c | 17 +++++------------
 3 files changed, 24 insertions(+), 17 deletions(-)

diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c
index 332b0ae02645..454d36c84671 100644
--- a/net/dsa/tag_8021q.c
+++ b/net/dsa/tag_8021q.c
@@ -468,8 +468,8 @@ struct sk_buff *dsa_8021q_xmit(struct sk_buff *skb, struct net_device *netdev,
 }
 EXPORT_SYMBOL_GPL(dsa_8021q_xmit);
 
-struct net_device *dsa_tag_8021q_find_port_by_vbid(struct net_device *conduit,
-						   int vbid)
+static struct net_device *
+dsa_tag_8021q_find_port_by_vbid(struct net_device *conduit, int vbid)
 {
 	struct dsa_port *cpu_dp = conduit->dsa_ptr;
 	struct dsa_switch_tree *dst = cpu_dp->dst;
@@ -495,7 +495,20 @@ struct net_device *dsa_tag_8021q_find_port_by_vbid(struct net_device *conduit,
 
 	return NULL;
 }
-EXPORT_SYMBOL_GPL(dsa_tag_8021q_find_port_by_vbid);
+
+struct net_device *dsa_tag_8021q_find_user(struct net_device *conduit,
+					   int source_port, int switch_id,
+					   int vid, int vbid)
+{
+	/* Always prefer precise source port information, if available */
+	if (source_port != -1 && switch_id != -1)
+		return dsa_conduit_find_user(conduit, switch_id, source_port);
+	else if (vbid >= 1)
+		return dsa_tag_8021q_find_port_by_vbid(conduit, vbid);
+
+	return dsa_find_designated_bridge_port_by_vid(conduit, vid);
+}
+EXPORT_SYMBOL_GPL(dsa_tag_8021q_find_user);
 
 /**
  * dsa_8021q_rcv - Decode source information from tag_8021q header
diff --git a/net/dsa/tag_8021q.h b/net/dsa/tag_8021q.h
index 0c6671d7c1c2..27b8906f99ec 100644
--- a/net/dsa/tag_8021q.h
+++ b/net/dsa/tag_8021q.h
@@ -16,8 +16,9 @@ struct sk_buff *dsa_8021q_xmit(struct sk_buff *skb, struct net_device *netdev,
 void dsa_8021q_rcv(struct sk_buff *skb, int *source_port, int *switch_id,
 		   int *vbid, int *vid);
 
-struct net_device *dsa_tag_8021q_find_port_by_vbid(struct net_device *conduit,
-						   int vbid);
+struct net_device *dsa_tag_8021q_find_user(struct net_device *conduit,
+					   int source_port, int switch_id,
+					   int vid, int vbid);
 
 int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
 				  struct dsa_notifier_tag_8021q_vlan_info *info);
diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c
index 35a6346549f2..3e902af7eea6 100644
--- a/net/dsa/tag_sja1105.c
+++ b/net/dsa/tag_sja1105.c
@@ -509,12 +509,8 @@ static struct sk_buff *sja1105_rcv(struct sk_buff *skb,
 		 */
 		return NULL;
 
-	if (source_port != -1 && switch_id != -1)
-		skb->dev = dsa_conduit_find_user(netdev, switch_id, source_port);
-	else if (vbid >= 1)
-		skb->dev = dsa_tag_8021q_find_port_by_vbid(netdev, vbid);
-	else
-		skb->dev = dsa_find_designated_bridge_port_by_vid(netdev, vid);
+	skb->dev = dsa_tag_8021q_find_user(netdev, source_port, switch_id,
+					   vid, vbid);
 	if (!skb->dev) {
 		netdev_warn(netdev, "Couldn't decode source port\n");
 		return NULL;
@@ -652,12 +648,9 @@ static struct sk_buff *sja1110_rcv(struct sk_buff *skb,
 	if (likely(sja1105_skb_has_tag_8021q(skb)))
 		dsa_8021q_rcv(skb, &source_port, &switch_id, &vbid, &vid);
 
-	if (source_port != -1 && switch_id != -1)
-		skb->dev = dsa_conduit_find_user(netdev, switch_id, source_port);
-	else if (vbid >= 1)
-		skb->dev = dsa_tag_8021q_find_port_by_vbid(netdev, vbid);
-	else
-		skb->dev = dsa_find_designated_bridge_port_by_vid(netdev, vid);
+	skb->dev = dsa_tag_8021q_find_user(netdev, source_port, switch_id,
+					   vid, vbid);
+
 	if (!skb->dev) {
 		netdev_warn(netdev, "Couldn't decode source port\n");
 		return NULL;
-- 
2.34.1

[PATCH net-next v5 12/16] net: dsa: vsc73xx: introduce tag 8021q for vsc73xx

[Pawel Dembicki]

This commit introduces a new tagger based on 802.1q tagging.
It's designed for the vsc73xx driver. The VSC73xx family doesn't have
any tag support for the RGMII port, but it could be based on VLANs.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - removed skb_vlan_tag_present(skb) checking
  - use 80 characters per line limit
v4:
  - rebase to net-next/main
v3:
  - Introduce a patch after the tagging patch split

 include/net/dsa.h           |  2 ++
 net/dsa/Kconfig             |  6 ++++
 net/dsa/Makefile            |  1 +
 net/dsa/tag_vsc73xx_8021q.c | 66 +++++++++++++++++++++++++++++++++++++
 4 files changed, 75 insertions(+)
 create mode 100644 net/dsa/tag_vsc73xx_8021q.c

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 7c0da9effe4e..b79e136e4c41 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -56,6 +56,7 @@ struct phylink_link_state;
 #define DSA_TAG_PROTO_RTL8_4T_VALUE		25
 #define DSA_TAG_PROTO_RZN1_A5PSW_VALUE		26
 #define DSA_TAG_PROTO_LAN937X_VALUE		27
+#define DSA_TAG_PROTO_VSC73XX_8021Q_VALUE	28
 
 enum dsa_tag_protocol {
 	DSA_TAG_PROTO_NONE		= DSA_TAG_PROTO_NONE_VALUE,
@@ -86,6 +87,7 @@ enum dsa_tag_protocol {
 	DSA_TAG_PROTO_RTL8_4T		= DSA_TAG_PROTO_RTL8_4T_VALUE,
 	DSA_TAG_PROTO_RZN1_A5PSW	= DSA_TAG_PROTO_RZN1_A5PSW_VALUE,
 	DSA_TAG_PROTO_LAN937X		= DSA_TAG_PROTO_LAN937X_VALUE,
+	DSA_TAG_PROTO_VSC73XX_8021Q	= DSA_TAG_PROTO_VSC73XX_8021Q_VALUE,
 };
 
 struct dsa_switch;
diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 8e698bea99a3..e59360071c67 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -166,6 +166,12 @@ config NET_DSA_TAG_TRAILER
 	  Say Y or M if you want to enable support for tagging frames at
 	  with a trailed. e.g. Marvell 88E6060.
 
+config NET_DSA_TAG_VSC73XX_8021Q
+	tristate "Tag driver for Microchip/Vitesse VSC73xx family of switches, using VLAN"
+	help
+	  Say Y or M if you want to enable support for tagging frames with a
+	  custom VLAN-based header.
+
 config NET_DSA_TAG_XRS700X
 	tristate "Tag driver for XRS700x switches"
 	help
diff --git a/net/dsa/Makefile b/net/dsa/Makefile
index 8a1894a42552..555c07cfeb71 100644
--- a/net/dsa/Makefile
+++ b/net/dsa/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_NET_DSA_TAG_RTL8_4) += tag_rtl8_4.o
 obj-$(CONFIG_NET_DSA_TAG_RZN1_A5PSW) += tag_rzn1_a5psw.o
 obj-$(CONFIG_NET_DSA_TAG_SJA1105) += tag_sja1105.o
 obj-$(CONFIG_NET_DSA_TAG_TRAILER) += tag_trailer.o
+obj-$(CONFIG_NET_DSA_TAG_VSC73XX_8021Q) += tag_vsc73xx_8021q.o
 obj-$(CONFIG_NET_DSA_TAG_XRS700X) += tag_xrs700x.o
 
 # for tracing framework to find trace.h
diff --git a/net/dsa/tag_vsc73xx_8021q.c b/net/dsa/tag_vsc73xx_8021q.c
new file mode 100644
index 000000000000..3197c2f0d472
--- /dev/null
+++ b/net/dsa/tag_vsc73xx_8021q.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/* Copyright (C) 2024 Pawel Dembicki <paweldembicki@gmail.com>
+ */
+#include <linux/dsa/8021q.h>
+
+#include "tag.h"
+#include "tag_8021q.h"
+
+#define VSC73XX_8021Q_NAME "vsc73xx-8021q"
+
+static struct sk_buff *
+vsc73xx_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct dsa_port *dp = dsa_user_to_port(netdev);
+	u16 queue_mapping = skb_get_queue_mapping(skb);
+	u16 tx_vid = dsa_tag_8021q_standalone_vid(dp);
+	u8 pcp;
+
+	if (skb->offload_fwd_mark) {
+		unsigned int bridge_num = dsa_port_bridge_num_get(dp);
+		struct net_device *br = dsa_port_bridge_dev_get(dp);
+
+		if (br_vlan_enabled(br))
+			return skb;
+
+		tx_vid = dsa_tag_8021q_bridge_vid(bridge_num);
+	}
+
+	pcp = netdev_txq_to_tc(netdev, queue_mapping);
+
+	return dsa_8021q_xmit(skb, netdev, ETH_P_8021Q,
+			      ((pcp << VLAN_PRIO_SHIFT) | tx_vid));
+}
+
+static struct sk_buff *
+vsc73xx_rcv(struct sk_buff *skb, struct net_device *netdev)
+{
+	int src_port = -1, switch_id = -1, vbid = -1, vid = -1;
+
+	dsa_8021q_rcv(skb, &src_port, &switch_id, &vbid, &vid);
+
+	skb->dev = dsa_tag_8021q_find_user(netdev, src_port, switch_id,
+					   vid, vbid);
+	if (!skb->dev) {
+		netdev_warn(netdev, "Couldn't decode source port\n");
+		return NULL;
+	}
+
+	dsa_default_offload_fwd_mark(skb);
+
+	return skb;
+}
+
+static const struct dsa_device_ops vsc73xx_8021q_netdev_ops = {
+	.name			= VSC73XX_8021Q_NAME,
+	.proto			= DSA_TAG_PROTO_VSC73XX_8021Q,
+	.xmit			= vsc73xx_xmit,
+	.rcv			= vsc73xx_rcv,
+	.needed_headroom	= VLAN_HLEN,
+	.promisc_on_conduit	= true,
+};
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_VSC73XX_8021Q, VSC73XX_8021Q_NAME);
+
+module_dsa_tag_driver(vsc73xx_8021q_netdev_ops);
-- 
2.34.1

[PATCH net-next v5 13/16] net: dsa: vsc73xx: Implement the tag_8021q VLAN operations

[Pawel Dembicki]

This patch is a simple implementation of 802.1q tagging in the vsc73xx
driver. Currently, devices with DSA_TAG_PROTO_NONE are not functional.
The VSC73XX family doesn't provide any tag support for external Ethernet
ports.

The only option available is VLAN-based tagging, which requires constant
hardware VLAN filtering. While the VSC73XX family supports provider
bridging, it only supports QinQ without full implementation of 802.1AD.
This means it only allows the doubled 0x8100 TPID.

In the simple port mode, QinQ is enabled to preserve forwarding of
VLAN-tagged frames.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - improve commit message
v4:
  - adjust tag8021q implementation for changed untagged vlan storage
  - minor fixes
v3:
  - Split tagger and tag implementation into separate commits

 drivers/net/dsa/Kconfig                |  2 +-
 drivers/net/dsa/vitesse-vsc73xx-core.c | 39 ++++++++++++++++++++++++--
 2 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
index 3092b391031a..22a04636d09e 100644
--- a/drivers/net/dsa/Kconfig
+++ b/drivers/net/dsa/Kconfig
@@ -126,7 +126,7 @@ config NET_DSA_SMSC_LAN9303_MDIO
 
 config NET_DSA_VITESSE_VSC73XX
 	tristate
-	select NET_DSA_TAG_NONE
+	select NET_DSA_TAG_VSC73XX_8021Q
 	select FIXED_PHY
 	select VITESSE_PHY
 	select GPIOLIB
diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index 87ad8b78f141..1132a86538a3 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -592,7 +592,7 @@ static enum dsa_tag_protocol vsc73xx_get_tag_protocol(struct dsa_switch *ds,
 	 * cannot access the tag. (See "Internal frame header" section
 	 * 3.9.1 in the manual.)
 	 */
-	return DSA_TAG_PROTO_NONE;
+	return DSA_TAG_PROTO_VSC73XX_8021Q;
 }
 
 static int vsc73xx_wait_for_vlan_table_cmd(struct vsc73xx *vsc)
@@ -683,7 +683,7 @@ vsc73xx_update_vlan_table(struct vsc73xx *vsc, int port, u16 vid, bool set)
 static int vsc73xx_setup(struct dsa_switch *ds)
 {
 	struct vsc73xx *vsc = ds->priv;
-	int i;
+	int i, ret;
 
 	dev_info(vsc->dev, "set up the switch\n");
 
@@ -752,6 +752,12 @@ static int vsc73xx_setup(struct dsa_switch *ds)
 
 	mdelay(50);
 
+	rtnl_lock();
+	ret = dsa_tag_8021q_register(ds, htons(ETH_P_8021Q));
+	rtnl_unlock();
+	if (ret)
+		return ret;
+
 	/* Release reset from the internal PHYs */
 	vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
 		      VSC73XX_GLORESET_PHY_RESET);
@@ -1554,6 +1560,33 @@ static int vsc73xx_port_vlan_del(struct dsa_switch *ds, int port,
 	return 0;
 }
 
+static int vsc73xx_tag_8021q_vlan_add(struct dsa_switch *ds, int port, u16 vid,
+				      u16 flags)
+{
+	bool untagged = flags & BRIDGE_VLAN_INFO_UNTAGGED;
+	bool pvid = flags & BRIDGE_VLAN_INFO_PVID;
+	struct vsc73xx *vsc = ds->priv;
+	bool operate_on_storage;
+
+	operate_on_storage = !vsc73xx_tag_8021q_active(dsa_to_port(ds, port));
+
+	if (untagged)
+		vsc73xx_vlan_change_untagged(vsc, port, vid, true,
+					     operate_on_storage);
+	if (pvid)
+		vsc73xx_vlan_change_pvid(vsc, port, vid, true,
+					 operate_on_storage);
+
+	return vsc73xx_update_vlan_table(vsc, port, vid, true);
+}
+
+static int vsc73xx_tag_8021q_vlan_del(struct dsa_switch *ds, int port, u16 vid)
+{
+	struct vsc73xx *vsc = ds->priv;
+
+	return vsc73xx_update_vlan_table(vsc, port, vid, false);
+}
+
 static int vsc73xx_port_setup(struct dsa_switch *ds, int port)
 {
 	struct vsc73xx *vsc = ds->priv;
@@ -1695,6 +1728,8 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.port_vlan_add = vsc73xx_port_vlan_add,
 	.port_vlan_del = vsc73xx_port_vlan_del,
 	.phylink_get_caps = vsc73xx_phylink_get_caps,
+	.tag_8021q_vlan_add = vsc73xx_tag_8021q_vlan_add,
+	.tag_8021q_vlan_del = vsc73xx_tag_8021q_vlan_del,
 };
 
 static int vsc73xx_gpio_get(struct gpio_chip *chip, unsigned int offset)
-- 
2.34.1

[PATCH net-next v5 14/16] net: dsa: Define max num of bridges in tag8021q implementation

[Pawel Dembicki]

Max number of bridges in tag8021q implementation is strictly limited
by VBID size: 3 bits. But zero is reserved and only 7 values can be used.

This patch adds define which describe maximum possible value.

Suggested-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
v5:
  - added 'Reviewed-by' only
v4:
  - introduce patch

 drivers/net/dsa/sja1105/sja1105_main.c | 3 +--
 include/linux/dsa/8021q.h              | 5 +++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 6646f7fb0f90..6e22d7a6bfa3 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -3156,8 +3156,7 @@ static int sja1105_setup(struct dsa_switch *ds)
 	ds->vlan_filtering_is_global = true;
 	ds->untag_bridge_pvid = true;
 	ds->fdb_isolation = true;
-	/* tag_8021q has 3 bits for the VBID, and the value 0 is reserved */
-	ds->max_num_bridges = 7;
+	ds->max_num_bridges = DSA_TAG_8021Q_MAX_NUM_BRIDGES;
 
 	/* Advertise the 8 egress queues */
 	ds->num_tx_queues = SJA1105_NUM_TC;
diff --git a/include/linux/dsa/8021q.h b/include/linux/dsa/8021q.h
index f3664ee12170..1dda2a13b832 100644
--- a/include/linux/dsa/8021q.h
+++ b/include/linux/dsa/8021q.h
@@ -8,6 +8,11 @@
 #include <net/dsa.h>
 #include <linux/types.h>
 
+/* VBID is limited to three bits only and zero is reserved.
+ * Only 7 bridges can be enumerated.
+ */
+#define DSA_TAG_8021Q_MAX_NUM_BRIDGES	7
+
 int dsa_tag_8021q_register(struct dsa_switch *ds, __be16 proto);
 
 void dsa_tag_8021q_unregister(struct dsa_switch *ds);
-- 
2.34.1

[PATCH net-next v5 15/16] net: dsa: vsc73xx: Add bridge support

[Pawel Dembicki]

This patch adds bridge support for vsc73xx driver.
It introduce two functions for port_bridge_join and
vsc73xx_port_bridge_leave handling.

Those functions implement forwarding adjust and use
dsa_tag_8021q_bridge_* api for adjust VLAN configuration.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
---
v5:
  - added 'Reviewed-by' only
v4:
  - remove forward configuration after stp patch refactoring
  - implement new define with max num of bridges for tag8021q devices
v3:
  - All vlan commits was reworked
  - move VLAN_AWR and VLAN_DBLAWR to port setup in other commit
  - drop vlan table upgrade
v2:
  - no changes done

 drivers/net/dsa/vitesse-vsc73xx-core.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index 1132a86538a3..8dc366461b9c 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -687,6 +687,9 @@ static int vsc73xx_setup(struct dsa_switch *ds)
 
 	dev_info(vsc->dev, "set up the switch\n");
 
+	ds->untag_bridge_pvid = true;
+	ds->max_num_bridges = DSA_TAG_8021Q_MAX_NUM_BRIDGES;
+
 	/* Issue RESET */
 	vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET,
 		      VSC73XX_GLORESET_MASTER_RESET);
@@ -1587,6 +1590,22 @@ static int vsc73xx_tag_8021q_vlan_del(struct dsa_switch *ds, int port, u16 vid)
 	return vsc73xx_update_vlan_table(vsc, port, vid, false);
 }
 
+static int vsc73xx_port_bridge_join(struct dsa_switch *ds, int port,
+				    struct dsa_bridge bridge,
+				    bool *tx_fwd_offload,
+				    struct netlink_ext_ack *extack)
+{
+	*tx_fwd_offload = true;
+
+	return dsa_tag_8021q_bridge_join(ds, port, bridge);
+}
+
+static void vsc73xx_port_bridge_leave(struct dsa_switch *ds, int port,
+				      struct dsa_bridge bridge)
+{
+	dsa_tag_8021q_bridge_leave(ds, port, bridge);
+}
+
 static int vsc73xx_port_setup(struct dsa_switch *ds, int port)
 {
 	struct vsc73xx *vsc = ds->priv;
@@ -1721,6 +1740,8 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.port_setup = vsc73xx_port_setup,
 	.port_enable = vsc73xx_port_enable,
 	.port_disable = vsc73xx_port_disable,
+	.port_bridge_join = vsc73xx_port_bridge_join,
+	.port_bridge_leave = vsc73xx_port_bridge_leave,
 	.port_change_mtu = vsc73xx_change_mtu,
 	.port_max_mtu = vsc73xx_get_max_mtu,
 	.port_stp_state_set = vsc73xx_port_stp_state_set,
-- 
2.34.1

[PATCH net-next v5 16/16] net: dsa: vsc73xx: start treating the BR_LEARNING flag

[Pawel Dembicki]

This patch implements .port_pre_bridge_flags() and .port_bridge_flags(),
which are required for properly treating the BR_LEARNING flag. Also,
.port_stp_state_set() is tweaked and now disables learning for standalone
ports.

Disabling learning for standalone ports is required to avoid situations
where one port sees traffic originating from another, which could cause
invalid operations.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
---
v5:
  - introduce patch

 drivers/net/dsa/vitesse-vsc73xx-core.c | 41 ++++++++++++++++++++++----
 1 file changed, 35 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c
index 8dc366461b9c..3b312799cf66 100644
--- a/drivers/net/dsa/vitesse-vsc73xx-core.c
+++ b/drivers/net/dsa/vitesse-vsc73xx-core.c
@@ -1590,6 +1590,31 @@ static int vsc73xx_tag_8021q_vlan_del(struct dsa_switch *ds, int port, u16 vid)
 	return vsc73xx_update_vlan_table(vsc, port, vid, false);
 }
 
+static int vsc73xx_port_pre_bridge_flags(struct dsa_switch *ds, int port,
+					 struct switchdev_brport_flags flags,
+					 struct netlink_ext_ack *extack)
+{
+	if (flags.mask & ~BR_LEARNING)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int vsc73xx_port_bridge_flags(struct dsa_switch *ds, int port,
+				     struct switchdev_brport_flags flags,
+				     struct netlink_ext_ack *extack)
+{
+	if (flags.mask & BR_LEARNING) {
+		struct vsc73xx *vsc = ds->priv;
+		u32 val = flags.val & BR_LEARNING ? BIT(port) : 0;
+
+		return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+					   VSC73XX_LEARNMASK, BIT(port), val);
+	}
+
+	return 0;
+}
+
 static int vsc73xx_port_bridge_join(struct dsa_switch *ds, int port,
 				    struct dsa_bridge bridge,
 				    bool *tx_fwd_offload,
@@ -1706,19 +1731,21 @@ static void vsc73xx_refresh_fwd_map(struct dsa_switch *ds, int port, u8 state)
 static void vsc73xx_port_stp_state_set(struct dsa_switch *ds, int port,
 				       u8 state)
 {
+	struct dsa_port *dp = dsa_to_port(ds, port);
 	struct vsc73xx *vsc = ds->priv;
-	u32 val;
+	u32 val = 0;
+
+	if (state == BR_STATE_LEARNING || state == BR_STATE_FORWARDING)
+		val = dp->learning ? BIT(port) : 0;
+
+	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
+			    VSC73XX_LEARNMASK, BIT(port), val);
 
 	val = (state == BR_STATE_BLOCKING || state == BR_STATE_DISABLED) ?
 	      0 : BIT(port);
 	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
 			    VSC73XX_RECVMASK, BIT(port), val);
 
-	val = (state == BR_STATE_LEARNING || state == BR_STATE_FORWARDING) ?
-	      BIT(port) : 0;
-	vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
-			    VSC73XX_LEARNMASK, BIT(port), val);
-
 	/* CPU Port should always forward packets when user ports are forwarding
 	 * so let's configure it from other ports only.
 	 */
@@ -1740,6 +1767,8 @@ static const struct dsa_switch_ops vsc73xx_ds_ops = {
 	.port_setup = vsc73xx_port_setup,
 	.port_enable = vsc73xx_port_enable,
 	.port_disable = vsc73xx_port_disable,
+	.port_pre_bridge_flags = vsc73xx_port_pre_bridge_flags,
+	.port_bridge_flags = vsc73xx_port_bridge_flags,
 	.port_bridge_join = vsc73xx_port_bridge_join,
 	.port_bridge_leave = vsc73xx_port_bridge_leave,
 	.port_change_mtu = vsc73xx_change_mtu,
-- 
2.34.1

Re: [PATCH net-next v5 04/16] net: dsa: vsc73xx: Add define for max num of ports

[Linus Walleij]

On Fri, Feb 23, 2024 at 10:02 PM Pawel Dembicki <paweldembicki@gmail.com> wrote:

> This patch introduces a new define: VSC73XX_MAX_NUM_PORTS, which can be
> used in the future instead of a hardcoded value.
>
> Currently, the only hardcoded value is vsc->ds->num_ports. It is being
> replaced with the new define.
>
> Suggested-by: Vladimir Oltean <olteanv@gmail.com>
> Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
> Reviewed-by: Vladimir Oltean <olteanv@gmail.com>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH net-next v5 12/16] net: dsa: vsc73xx: introduce tag 8021q for vsc73xx

[Jakub Kicinski]

On Fri, 23 Feb 2024 22:00:42 +0100 Pawel Dembicki wrote:
> This commit introduces a new tagger based on 802.1q tagging.
> It's designed for the vsc73xx driver. The VSC73xx family doesn't have
> any tag support for the RGMII port, but it could be based on VLANs.
> 
> Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
> ---
> v5:
>   - removed skb_vlan_tag_present(skb) checking
>   - use 80 characters per line limit
> v4:
>   - rebase to net-next/main
> v3:
>   - Introduce a patch after the tagging patch split
> 
>  include/net/dsa.h           |  2 ++
>  net/dsa/Kconfig             |  6 ++++
>  net/dsa/Makefile            |  1 +
>  net/dsa/tag_vsc73xx_8021q.c | 66 +++++++++++++++++++++++++++++++++++++
>  4 files changed, 75 insertions(+)
>  create mode 100644 net/dsa/tag_vsc73xx_8021q.c

> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_VSC73XX_8021Q, VSC73XX_8021Q_NAME);
> +
> +module_dsa_tag_driver(vsc73xx_8021q_netdev_ops);

W=1 build generates:

WARNING: modpost: missing MODULE_DESCRIPTION() in net/dsa/tag_vsc73xx_8021q.o
-- 
pw-bot: cr

Re: [PATCH net-next v5 06/16] net: dsa: vsc73xx: add port_stp_state_set function

[Simon Horman]

On Fri, Feb 23, 2024 at 10:00:36PM +0100, Pawel Dembicki wrote:
> This isn't a fully functional implementation of 802.1D, but
> port_stp_state_set is required for a future tag8021q operations.
> 
> This implementation handles properly all states, but vsc73xx doesn't
> forward STP packets.
> 
> Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>

...

> diff --git a/drivers/net/dsa/vitesse-vsc73xx-core.c b/drivers/net/dsa/vitesse-vsc73xx-core.c

...

> @@ -1036,6 +1029,89 @@ static void vsc73xx_phylink_get_caps(struct dsa_switch *dsa, int port,
>  	config->mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000;
>  }
>  
> +static void vsc73xx_refresh_fwd_map(struct dsa_switch *ds, int port, u8 state)
> +{
> +	struct dsa_port *other_dp, *dp = dsa_to_port(ds, port);
> +	struct vsc73xx *vsc = ds->priv;
> +	u16 mask;
> +
> +	if (state != BR_STATE_FORWARDING) {
> +		/* Ports that aren't in the forwarding state must not
> +		 * forward packets anywhere.
> +		 */
> +		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> +				    VSC73XX_SRCMASKS + port,
> +				    VSC73XX_SRCMASKS_PORTS_MASK, 0);
> +
> +		dsa_switch_for_each_available_port(other_dp, ds) {
> +			if (other_dp == dp)
> +				continue;
> +			vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> +					    VSC73XX_SRCMASKS + other_dp->index,
> +					    BIT(port), 0);
> +		}
> +
> +	return;

Nit: the line above should be indented by one more tab.

> +	}

...

Re: [PATCH net-next v5 16/16] net: dsa: vsc73xx: start treating the BR_LEARNING flag

[Simon Horman]

On Fri, Feb 23, 2024 at 10:00:46PM +0100, Pawel Dembicki wrote:
> This patch implements .port_pre_bridge_flags() and .port_bridge_flags(),
> which are required for properly treating the BR_LEARNING flag. Also,
> .port_stp_state_set() is tweaked and now disables learning for standalone
> ports.
> 
> Disabling learning for standalone ports is required to avoid situations
> where one port sees traffic originating from another, which could cause
> invalid operations.
> 
> Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>

...

> +static int vsc73xx_port_bridge_flags(struct dsa_switch *ds, int port,
> +				     struct switchdev_brport_flags flags,
> +				     struct netlink_ext_ack *extack)
> +{
> +	if (flags.mask & BR_LEARNING) {
> +		struct vsc73xx *vsc = ds->priv;
> +		u32 val = flags.val & BR_LEARNING ? BIT(port) : 0;

Hi Pawel,

as it seems there will be a new revision anyway,
please consider arranging local variables in reverse xmas tree order -
longest line to shortest.

> +
> +		return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
> +					   VSC73XX_LEARNMASK, BIT(port), val);
> +	}
> +
> +	return 0;
> +}
> +
>  static int vsc73xx_port_bridge_join(struct dsa_switch *ds, int port,
>  				    struct dsa_bridge bridge,
>  				    bool *tx_fwd_offload,

...

Re: [PATCH net-next v5 06/16] net: dsa: vsc73xx: add port_stp_state_set function

[kernel test robot]

Hi Pawel,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Pawel-Dembicki/net-dsa-vsc73xx-use-read_poll_timeout-instead-delay-loop/20240224-050950
base:   net-next/main
patch link:    https://lore.kernel.org/r/20240223210049.3197486-7-paweldembicki%40gmail.com
patch subject: [PATCH net-next v5 06/16] net: dsa: vsc73xx: add port_stp_state_set function
config: x86_64-randconfig-161-20240301 (https://download.01.org/0day-ci/archive/20240301/202403011918.VO71zUCH-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403011918.VO71zUCH-lkp@intel.com/

smatch warnings:
drivers/net/dsa/vitesse-vsc73xx-core.c:1054 vsc73xx_refresh_fwd_map() warn: inconsistent indenting

vim +1054 drivers/net/dsa/vitesse-vsc73xx-core.c

  1031	
  1032	static void vsc73xx_refresh_fwd_map(struct dsa_switch *ds, int port, u8 state)
  1033	{
  1034		struct dsa_port *other_dp, *dp = dsa_to_port(ds, port);
  1035		struct vsc73xx *vsc = ds->priv;
  1036		u16 mask;
  1037	
  1038		if (state != BR_STATE_FORWARDING) {
  1039			/* Ports that aren't in the forwarding state must not
  1040			 * forward packets anywhere.
  1041			 */
  1042			vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
  1043					    VSC73XX_SRCMASKS + port,
  1044					    VSC73XX_SRCMASKS_PORTS_MASK, 0);
  1045	
  1046			dsa_switch_for_each_available_port(other_dp, ds) {
  1047				if (other_dp == dp)
  1048					continue;
  1049				vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
  1050						    VSC73XX_SRCMASKS + other_dp->index,
  1051						    BIT(port), 0);
  1052			}
  1053	
> 1054		return;
  1055		}
  1056	
  1057		/* Forwarding ports must forward to the CPU and to other ports
  1058		 * in the same bridge
  1059		 */
  1060		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
  1061				    VSC73XX_SRCMASKS + CPU_PORT, BIT(port), BIT(port));
  1062	
  1063		mask = BIT(CPU_PORT);
  1064	
  1065		if (dp->bridge) {
  1066			dsa_switch_for_each_user_port(other_dp, ds) {
  1067				if (other_dp->bridge == dp->bridge &&
  1068				    other_dp->index != port &&
  1069				    other_dp->stp_state == BR_STATE_FORWARDING) {
  1070					int other_port = other_dp->index;
  1071	
  1072					mask |= BIT(other_port);
  1073					vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER,
  1074							    0,
  1075							    VSC73XX_SRCMASKS +
  1076							    other_port,
  1077							    BIT(port), BIT(port));
  1078				}
  1079			}
  1080		}
  1081	
  1082		vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0,
  1083				    VSC73XX_SRCMASKS + port,
  1084				    VSC73XX_SRCMASKS_PORTS_MASK, mask);
  1085	}
  1086	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki