[net-next PATCH 00/13] net: renesas: rswitch: R-Car S4 add VLAN aware switching

[net-next PATCH 00/13] net: renesas: rswitch: R-Car S4 add VLAN aware switching

[Michael Dege]

Hello!

The current R-Car S4 rswitch driver only supports basic HW offloading
for L2 switching/bridgeing. This patchset extends the driver with
support for VLAN aware switching.

1. For every port mode change from configuration to operation and
   vice-versa you need to change to disabled mode first. The
   functions rswitch_<port>_change_mode now take care of this. 

2. In upcomming changes for adding vlan support struct net_device
   will not be available in all cases, therefore use struct device
   instead.

3. Fix typo in register define macro and remove duplicate macro.

4. Add register definitions needed fo vlan support.

5. Add exception path for packets with unknown destitination MAC
   addresses.

6. Make the helper functions rswitch_reg_wait(),
   rswitch_etha_change_mode() and rswitch_etha_change_mode()
   available to the whole driver.

7. Add basic start-up time initialization needed to support VLANs.

8. Update ETHA and GWCA port HW initializations.

9. Clean up is_rdev() rswitch_device checking.

10. Provide struct rswitch_private to notifiers.

11. Add handler for FDB notifications to configure bridge MAC address
    to GWCA registers and update static MAC table entry.

12. Add vlan support to L2 HW bridge.

Configuration example:
ip link add name br0 type bridge vlan_filtering 1
ip link set dev tsn0 master br0
ip link set dev tsn1 master br0
ip link set dev br0 up
ip link set dev tsn0 up
ip link set dev tsn1 up
bridge vlan add dev tsn0 vid 4
bridge vlan add dev tsn1 vid 4
bridge vlan add dev br0 vid 4 self
ip a a 192.168.1.20/24 dev br0
ip l a link br0 name br0.1 type vlan id 1
ip l a link br0 name br0.4 type vlan id 4
ip a a 192.168.2.20/24 dev br0.1
ip a a 192.168.4.20/24 dev br0.4
ip link set dev br0.1 up
ip link set dev br0.4 up

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
Michael Dege (13):
      net: renesas: rswitch: improve port change mode functions
      net: renesas: rswitch: use device instead of net_device
      net: renesas: rswitch: fix FWPC2 register access macros
      net: renesas: rswitch: add register definitions for vlan support
      net: renesas: rswitch: add exception path for packets with unknown dst MAC
      net: renesas: rswitch: add forwarding rules for gwca
      net: renesas: rswitch: make helper functions available to whole driver
      net: renesas: rswitch: add basic vlan init to rswitch_fwd_init
      net: renesas: rswitch: update port HW init
      net: renesas: rswitch: clean up is_rdev rswitch_device checking
      net: renesas: rswitch: add passing of rswitch_private into notifiers
      net: renesas: rswitch: add handler for FDB notification
      net: renesas: rswitch: add vlan aware switching

 drivers/net/ethernet/renesas/rswitch.h      | 181 +++++++-
 drivers/net/ethernet/renesas/rswitch_l2.c   | 641 ++++++++++++++++++++++++----
 drivers/net/ethernet/renesas/rswitch_l2.h   |   6 +-
 drivers/net/ethernet/renesas/rswitch_main.c | 203 ++++++---
 4 files changed, 875 insertions(+), 156 deletions(-)
---
base-commit: 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681
change-id: 20260120-rswitch_add_vlans-39488bfb296c

Best regards,
-- 
Michael Dege <michael.dege@renesas.com>

[PATCH net-next 01/13] net: renesas: rswitch: improve port change mode functions

[Michael Dege]

For ETHA and GWCA ports every mode change from operational to
configuration and vice-versa requires to change the mode to
"disable" first. This was done by calling the function twice.
Let the change_mode functione take care of this requiered step
in a single call.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch_main.c | 39 +++++++++++++----------------
 1 file changed, 18 insertions(+), 21 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index 6fe964816322..f6d1e610e7fa 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -176,14 +176,19 @@ static int rswitch_gwca_change_mode(struct rswitch_private *priv,
 	if (!rswitch_agent_clock_is_enabled(priv->addr, priv->gwca.index))
 		rswitch_agent_clock_ctrl(priv->addr, priv->gwca.index, 1);
 
-	iowrite32(mode, priv->addr + GWMC);
+	iowrite32(GWMC_OPC_DISABLE, priv->addr + GWMC);
 
-	ret = rswitch_reg_wait(priv->addr, GWMS, GWMS_OPS_MASK, mode);
+	ret = rswitch_reg_wait(priv->addr, GWMS, GWMS_OPS_MASK, GWMC_OPC_DISABLE);
 
-	if (mode == GWMC_OPC_DISABLE)
+	if (mode == GWMC_OPC_DISABLE) {
 		rswitch_agent_clock_ctrl(priv->addr, priv->gwca.index, 0);
 
-	return ret;
+		return ret;
+	}
+
+	iowrite32(mode, priv->addr + GWMC);
+
+	return rswitch_reg_wait(priv->addr, GWMS, GWMS_OPS_MASK, mode);
 }
 
 static int rswitch_gwca_mcast_table_reset(struct rswitch_private *priv)
@@ -682,9 +687,6 @@ static int rswitch_gwca_hw_init(struct rswitch_private *priv)
 	unsigned int i;
 	int err;
 
-	err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
-	if (err < 0)
-		return err;
 	err = rswitch_gwca_change_mode(priv, GWMC_OPC_CONFIG);
 	if (err < 0)
 		return err;
@@ -717,9 +719,6 @@ static int rswitch_gwca_hw_init(struct rswitch_private *priv)
 			return err;
 	}
 
-	err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
-	if (err < 0)
-		return err;
 	return rswitch_gwca_change_mode(priv, GWMC_OPC_OPERATION);
 }
 
@@ -727,9 +726,6 @@ static int rswitch_gwca_hw_deinit(struct rswitch_private *priv)
 {
 	int err;
 
-	err = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE);
-	if (err < 0)
-		return err;
 	err = rswitch_gwca_change_mode(priv, GWMC_OPC_RESET);
 	if (err < 0)
 		return err;
@@ -1116,14 +1112,18 @@ static int rswitch_etha_change_mode(struct rswitch_etha *etha,
 	if (!rswitch_agent_clock_is_enabled(etha->coma_addr, etha->index))
 		rswitch_agent_clock_ctrl(etha->coma_addr, etha->index, 1);
 
-	iowrite32(mode, etha->addr + EAMC);
-
-	ret = rswitch_reg_wait(etha->addr, EAMS, EAMS_OPS_MASK, mode);
+	iowrite32(EAMC_OPC_DISABLE, etha->addr + EAMC);
+	ret = rswitch_reg_wait(etha->addr, EAMS, EAMS_OPS_MASK, EAMC_OPC_DISABLE);
 
-	if (mode == EAMC_OPC_DISABLE)
+	if (mode == EAMC_OPC_DISABLE) {
 		rswitch_agent_clock_ctrl(etha->coma_addr, etha->index, 0);
 
-	return ret;
+		return ret;
+	}
+
+	iowrite32(mode, etha->addr + EAMC);
+
+	return rswitch_reg_wait(etha->addr, EAMS, EAMS_OPS_MASK, mode);
 }
 
 static void rswitch_etha_read_mac_address(struct rswitch_etha *etha)
@@ -1203,9 +1203,6 @@ static int rswitch_etha_hw_init(struct rswitch_etha *etha, const u8 *mac)
 {
 	int err;
 
-	err = rswitch_etha_change_mode(etha, EAMC_OPC_DISABLE);
-	if (err < 0)
-		return err;
 	err = rswitch_etha_change_mode(etha, EAMC_OPC_CONFIG);
 	if (err < 0)
 		return err;

-- 
2.43.0

[PATCH net-next 02/13] net: renesas: rswitch: use device instead of net_device

[Michael Dege]

In upcomming changes for adding vlan support struct net_device
will not be available in all cases, therefore use struct device
instead.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch_main.c | 34 ++++++++++++++---------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index f6d1e610e7fa..f10e188bc0bd 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -302,13 +302,13 @@ static int rswitch_gwca_queue_alloc_rx_buf(struct rswitch_gwca_queue *gq,
 	return -ENOMEM;
 }
 
-static void rswitch_gwca_queue_free(struct net_device *ndev,
+static void rswitch_gwca_queue_free(struct device *dev,
 				    struct rswitch_gwca_queue *gq)
 {
 	unsigned int i;
 
 	if (!gq->dir_tx) {
-		dma_free_coherent(ndev->dev.parent,
+		dma_free_coherent(dev,
 				  sizeof(struct rswitch_ext_ts_desc) *
 				  (gq->ring_size + 1), gq->rx_ring, gq->ring_dma);
 		gq->rx_ring = NULL;
@@ -318,7 +318,7 @@ static void rswitch_gwca_queue_free(struct net_device *ndev,
 		kfree(gq->rx_bufs);
 		gq->rx_bufs = NULL;
 	} else {
-		dma_free_coherent(ndev->dev.parent,
+		dma_free_coherent(dev,
 				  sizeof(struct rswitch_ext_desc) *
 				  (gq->ring_size + 1), gq->tx_ring, gq->ring_dma);
 		gq->tx_ring = NULL;
@@ -357,7 +357,7 @@ static int rswitch_gwca_queue_alloc(struct net_device *ndev,
 		if (rswitch_gwca_queue_alloc_rx_buf(gq, 0, gq->ring_size) < 0)
 			goto out;
 
-		gq->rx_ring = dma_alloc_coherent(ndev->dev.parent,
+		gq->rx_ring = dma_alloc_coherent(&priv->pdev->dev,
 						 sizeof(struct rswitch_ext_ts_desc) *
 						 (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL);
 	} else {
@@ -367,7 +367,7 @@ static int rswitch_gwca_queue_alloc(struct net_device *ndev,
 		gq->unmap_addrs = kzalloc_objs(*gq->unmap_addrs, gq->ring_size);
 		if (!gq->unmap_addrs)
 			goto out;
-		gq->tx_ring = dma_alloc_coherent(ndev->dev.parent,
+		gq->tx_ring = dma_alloc_coherent(&priv->pdev->dev,
 						 sizeof(struct rswitch_ext_desc) *
 						 (gq->ring_size + 1), &gq->ring_dma, GFP_KERNEL);
 	}
@@ -385,7 +385,7 @@ static int rswitch_gwca_queue_alloc(struct net_device *ndev,
 	return 0;
 
 out:
-	rswitch_gwca_queue_free(ndev, gq);
+	rswitch_gwca_queue_free(&priv->pdev->dev, gq);
 
 	return -ENOMEM;
 }
@@ -467,12 +467,11 @@ static void rswitch_gwca_ts_queue_fill(struct rswitch_private *priv,
 	}
 }
 
-static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev,
+static int rswitch_gwca_queue_ext_ts_fill(struct device *dev,
 					  struct rswitch_gwca_queue *gq,
 					  unsigned int start_index,
 					  unsigned int num)
 {
-	struct rswitch_device *rdev = netdev_priv(ndev);
 	struct rswitch_ext_ts_desc *desc;
 	unsigned int i, index;
 	dma_addr_t dma_addr;
@@ -481,18 +480,17 @@ static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev,
 		index = (i + start_index) % gq->ring_size;
 		desc = &gq->rx_ring[index];
 		if (!gq->dir_tx) {
-			dma_addr = dma_map_single(ndev->dev.parent,
+			dma_addr = dma_map_single(dev,
 						  gq->rx_bufs[index] + RSWITCH_HEADROOM,
 						  RSWITCH_MAP_BUF_SIZE,
 						  DMA_FROM_DEVICE);
-			if (dma_mapping_error(ndev->dev.parent, dma_addr))
+			if (dma_mapping_error(dev, dma_addr))
 				goto err;
 
 			desc->desc.info_ds = cpu_to_le16(RSWITCH_DESC_BUF_SIZE);
 			rswitch_desc_set_dptr(&desc->desc, dma_addr);
 			dma_wmb();
 			desc->desc.die_dt = DT_FEMPTY | DIE;
-			desc->info1 = cpu_to_le64(INFO1_SPN(rdev->etha->index));
 		} else {
 			desc->desc.die_dt = DT_EEMPTY | DIE;
 		}
@@ -506,7 +504,7 @@ static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev,
 			index = (i + start_index) % gq->ring_size;
 			desc = &gq->rx_ring[index];
 			dma_addr = rswitch_desc_get_dptr(&desc->desc);
-			dma_unmap_single(ndev->dev.parent, dma_addr,
+			dma_unmap_single(dev, dma_addr,
 					 RSWITCH_MAP_BUF_SIZE, DMA_FROM_DEVICE);
 		}
 	}
@@ -514,7 +512,7 @@ static int rswitch_gwca_queue_ext_ts_fill(struct net_device *ndev,
 	return -ENOMEM;
 }
 
-static int rswitch_gwca_queue_ext_ts_format(struct net_device *ndev,
+static int rswitch_gwca_queue_ext_ts_format(struct device *dev,
 					    struct rswitch_private *priv,
 					    struct rswitch_gwca_queue *gq)
 {
@@ -524,7 +522,7 @@ static int rswitch_gwca_queue_ext_ts_format(struct net_device *ndev,
 	int err;
 
 	memset(gq->rx_ring, 0, ring_size);
-	err = rswitch_gwca_queue_ext_ts_fill(ndev, gq, 0, gq->ring_size);
+	err = rswitch_gwca_queue_ext_ts_fill(dev, gq, 0, gq->ring_size);
 	if (err < 0)
 		return err;
 
@@ -636,7 +634,7 @@ static void rswitch_txdmac_free(struct net_device *ndev)
 {
 	struct rswitch_device *rdev = netdev_priv(ndev);
 
-	rswitch_gwca_queue_free(ndev, rdev->tx_queue);
+	rswitch_gwca_queue_free(ndev->dev.parent, rdev->tx_queue);
 	rswitch_gwca_put(rdev->priv, rdev->tx_queue);
 }
 
@@ -670,7 +668,7 @@ static void rswitch_rxdmac_free(struct net_device *ndev)
 {
 	struct rswitch_device *rdev = netdev_priv(ndev);
 
-	rswitch_gwca_queue_free(ndev, rdev->rx_queue);
+	rswitch_gwca_queue_free(ndev->dev.parent, rdev->rx_queue);
 	rswitch_gwca_put(rdev->priv, rdev->rx_queue);
 }
 
@@ -679,7 +677,7 @@ static int rswitch_rxdmac_init(struct rswitch_private *priv, unsigned int index)
 	struct rswitch_device *rdev = priv->rdev[index];
 	struct net_device *ndev = rdev->ndev;
 
-	return rswitch_gwca_queue_ext_ts_format(ndev, priv, rdev->rx_queue);
+	return rswitch_gwca_queue_ext_ts_format(ndev->dev.parent, priv, rdev->rx_queue);
 }
 
 static int rswitch_gwca_hw_init(struct rswitch_private *priv)
@@ -870,7 +868,7 @@ static bool rswitch_rx(struct net_device *ndev, int *quota)
 	ret = rswitch_gwca_queue_alloc_rx_buf(gq, gq->dirty, num);
 	if (ret < 0)
 		goto err;
-	ret = rswitch_gwca_queue_ext_ts_fill(ndev, gq, gq->dirty, num);
+	ret = rswitch_gwca_queue_ext_ts_fill(ndev->dev.parent, gq, gq->dirty, num);
 	if (ret < 0)
 		goto err;
 	gq->dirty = rswitch_next_queue_index(gq, false, num);

-- 
2.43.0

[PATCH net-next 03/13] net: renesas: rswitch: fix FWPC2 register access macros

[Michael Dege]

Fix typo in macro name and remove duplicate macro definition.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.h      | 3 +--
 drivers/net/ethernet/renesas/rswitch_l2.c   | 2 +-
 drivers/net/ethernet/renesas/rswitch_main.c | 2 +-
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index aa605304fed0..340524d995ac 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -826,8 +826,7 @@ enum rswitch_gwca_mode {
 #define FWPC1_DDE		BIT(0)
 
 #define FWPC2(i)		(FWPC20 + (i) * 0x10)
-#define FWCP2_LTWFW		GENMASK(16 + (RSWITCH_NUM_AGENTS - 1), 16)
-#define FWCP2_LTWFW_MASK	GENMASK(16 + (RSWITCH_NUM_AGENTS - 1), 16)
+#define FWPC2_LTWFW		GENMASK(16 + (RSWITCH_NUM_AGENTS - 1), 16)
 
 #define FWPBFC(i)		(FWPBFC0 + (i) * 0x10)
 #define FWPBFC_PBDV		GENMASK(RSWITCH_NUM_AGENTS - 1, 0)
diff --git a/drivers/net/ethernet/renesas/rswitch_l2.c b/drivers/net/ethernet/renesas/rswitch_l2.c
index 9433cd8adced..709524c8a5c4 100644
--- a/drivers/net/ethernet/renesas/rswitch_l2.c
+++ b/drivers/net/ethernet/renesas/rswitch_l2.c
@@ -82,7 +82,7 @@ static void rswitch_update_l2_hw_forwarding(struct rswitch_private *priv)
 			 *
 			 * Do not allow L2 forwarding to self for hw port.
 			 */
-			iowrite32(FIELD_PREP(FWCP2_LTWFW_MASK, fwd_mask | BIT(rdev->port)),
+			iowrite32(FIELD_PREP(FWPC2_LTWFW, fwd_mask | BIT(rdev->port)),
 				  priv->addr + FWPC2(rdev->port));
 		}
 
diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index f10e188bc0bd..d404bc41bd1e 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -129,7 +129,7 @@ static int rswitch_fwd_init(struct rswitch_private *priv)
 		iowrite32(FIELD_PREP(FWCP1_LTHFW, all_ports_mask),
 			  priv->addr + FWPC1(i));
 		/* Disallow L2 forwarding */
-		iowrite32(FIELD_PREP(FWCP2_LTWFW, all_ports_mask),
+		iowrite32(FIELD_PREP(FWPC2_LTWFW, all_ports_mask),
 			  priv->addr + FWPC2(i));
 		/* Disallow port based forwarding */
 		iowrite32(0, priv->addr + FWPBFC(i));

-- 
2.43.0

[PATCH net-next 04/13] net: renesas: rswitch: add register definitions for vlan support

[Michael Dege]

Add missing register and bit definitions for vlan support.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.h | 156 ++++++++++++++++++++++++++++++++-
 1 file changed, 152 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 340524d995ac..15d3fa48b0e3 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -7,8 +7,10 @@
 #ifndef __RSWITCH_H__
 #define __RSWITCH_H__
 
+#include <linux/if_vlan.h>
 #include <linux/platform_device.h>
 #include <linux/phy.h>
+#include <net/switchdev.h>
 
 #include "rcar_gen4_ptp.h"
 
@@ -221,7 +223,7 @@ enum rswitch_reg {
 	FWMACTL1	= FWRO + 0x4634,
 	FWMACTL2	= FWRO + 0x4638,
 	FWMACTL3	= FWRO + 0x463c,
-	FWMACTL4	= FWRO + 0x4640,
+	FWMACTL40	= FWRO + 0x4640,
 	FWMACTL5	= FWRO + 0x4650,
 	FWMACTLR	= FWRO + 0x4654,
 	FWMACTIM	= FWRO + 0x4660,
@@ -249,7 +251,7 @@ enum rswitch_reg {
 	FWVLANTL0	= FWRO + 0x4910,
 	FWVLANTL1	= FWRO + 0x4914,
 	FWVLANTL2	= FWRO + 0x4918,
-	FWVLANTL3	= FWRO + 0x4920,
+	FWVLANTL30	= FWRO + 0x4920,
 	FWVLANTL4	= FWRO + 0x4930,
 	FWVLANTLR	= FWRO + 0x4934,
 	FWVLANTIM	= FWRO + 0x4940,
@@ -508,7 +510,7 @@ enum rswitch_reg {
 	EACTDQMLM	= TARO + 0x010c,
 	EAVCC		= TARO + 0x0130,
 	EAVTC		= TARO + 0x0134,
-	EATTFC		= TARO + 0x0138,
+	EARTFC		= TARO + 0x0138,
 	EACAEC		= TARO + 0x0200,
 	EACC		= TARO + 0x0204,
 	EACAIVC0	= TARO + 0x0220,
@@ -729,6 +731,41 @@ enum rswitch_etha_mode {
 
 #define EAMS_OPS_MASK		EAMC_OPC_OPERATION
 
+/* bit field definitions for EAVCC and GWVCC */
+#define VEM			GENMASK(18, 16)
+#define VIM			BIT(0)
+
+/* bit field definitions for EAVTC and GWVTC */
+#define STD			BIT(31)
+#define STP			GENMASK(30, 28)
+#define STV			GENMASK(27, 16)
+#define CTD			BIT(15)
+#define CTP			GENMASK(14, 12)
+#define CTV			GENMASK(11, 0)
+
+/* bit field definitions for EARTFC and GWTTCF */
+#define UT			BIT(8)
+#define SCRT			BIT(7)
+#define SCT			BIT(6)
+#define CRT			BIT(5)
+#define CT			BIT(4)
+#define CSRT			BIT(3)
+#define CST			BIT(2)
+#define RT			BIT(1)
+#define NT			BIT(0)
+
+/* bit field definitions for EARDQDC and GWRDQDC */
+#define DQD			GENMASK(10, 0)
+#define DES_RAM_DP		0x400
+
+enum vlan_egress_mode {
+	NO_VLAN,
+	C_TAG_VLAN,
+	HW_C_TAG_VLAN,
+	SC_TAG_VLAN,
+	HW_SC_TAG_VLAN,
+};
+
 #define EAVCC_VEM_SC_TAG	(0x3 << 16)
 
 #define MPIC_PIS		GENMASK(2, 0)
@@ -806,6 +843,22 @@ enum rswitch_gwca_mode {
 #define CABPPFLC_INIT_VALUE	0x00800080
 
 /* MFWD */
+#define FWGC_SVM		GENMASK(1, 0)
+
+enum switch_vlan_mode {
+	NO_VLAN_MODE,
+	C_TAG,
+	SC_TAG,
+};
+
+/* FWCEPRC2 */
+#define FDMACSLFEF		BIT(19)
+#define FDMACUFEF		BIT(3)
+
+/* FWCEPTC */
+#define EPCS			GENMASK(17, 16)
+#define EPCSD			GENMASK(6, 0)
+
 #define FWPC0(i)		(FWPC00 + (i) * 0x10)
 #define FWPC0_LTHTA		BIT(0)
 #define FWPC0_IP4UE		BIT(3)
@@ -816,10 +869,13 @@ enum rswitch_gwca_mode {
 #define FWPC0_IPDSA		BIT(12)
 #define FWPC0_IPHLA		BIT(18)
 #define FWPC0_MACDSA		BIT(20)
+#define FWPC0_MACRUDA           BIT(21)
 #define FWPC0_MACSSA		BIT(23)
 #define FWPC0_MACHLA		BIT(26)
 #define FWPC0_MACHMA		BIT(27)
 #define FWPC0_VLANSA		BIT(28)
+#define FWPC0_VLANRU            BIT(29)
+#define FWPC0_VLANRUS           BIT(30)
 
 #define FWPC1(i)		(FWPC10 + (i) * 0x10)
 #define FWCP1_LTHFW		GENMASK(16 + (RSWITCH_NUM_AGENTS - 1), 16)
@@ -847,6 +903,98 @@ enum rswitch_gwca_mode {
 #define FWMACAGC_MACAGOG	BIT(28)
 #define FWMACAGC_MACDESOG	BIT(29)
 
+//FWMACTL0
+#define FWMACTL0_ED		BIT(16)
+#define FWMACTL0_HLD		BIT(10)
+#define FWMACTL0_DE		BIT(9)
+#define FWMACTL0_SL		BIT(8)
+
+//FWMACTL3
+#define FWMACTL3_DSLV		GENMASK(16 + RSWITCH_NUM_AGENTS - 1, 16)
+#define FWMACTL3_SSLV		GENMASK(RSWITCH_NUM_AGENTS - 1, 0)
+
+//FWMACTL4
+#define FWMACTL4(i)		(FWMACTL40 + (i) * 4)
+#define FWMACTL4_CSDL		GENMASK(6, 0)
+
+//FWMACTL5
+#define FWMACTL5_CME		BIT(21)
+#define FWMACTL5_EME		BIT(20)
+#define FWMACTL5_IPU		BIT(19)
+#define FWMACTL5_IPV		GENMASK(18, 16)
+#define FWMACTL5_DV		GENMASK(6, 0)
+
+//FWMACTLR
+#define FWMACTLR_L		BIT(31)
+#define FWMACTLR_LCN		GENMASK(25, 16)
+#define FWMACTLR_LO		BIT(3)
+#define FWMACTLR_LEF		BIT(2)
+#define FWMACTLR_LSF		BIT(1)
+#define FWMACTLR_LF		BIT(0)
+
+// FWVLANTEC
+#define VLANTMUE		GENMASK(28, 16)
+
+// FWVLANTL0
+#define VLANED			BIT(16)
+#define VLANHLDL		BIT(10)
+#define VLANSLL			BIT(8)
+
+// FWVLANTL1
+#define VLANVIDL		GENMASK(11, 0)
+
+// FWVLANTL2
+#define VLANSLVL		GENMASK(6, 0)
+
+// FWVLANTL3
+#define FWVLANTL3(i)		(FWVLANTL30 + (i) * 4)
+#define VLANCSDL		GENMASK(6, 0)
+
+// FWVLANTL4
+#define VLANCMEL		BIT(21)
+#define VLANEMEL		BIT(20)
+#define VLANIPUL		BIT(19)
+#define VLANIPVL		GENMASK(18, 16)
+#define VLANDVL			GENMASK(6, 0)
+
+// FWVLANTLR
+#define VLANTL			BIT(31)
+#define VLANLO			BIT(3)
+#define VLANLEF			BIT(2)
+#define VLANLSF			BIT(1)
+#define VLANLF			BIT(0)
+
+// FWVLANTIM
+#define VLANTR			BIT(1)
+#define VLANTIOG		BIT(0)
+
+// FWVLANTEM
+#define VLANTUEN		GENMASK(28, 16)
+#define VLANTEN			GENAMSK(12, 0)
+
+// FWVLANTS
+#define VLANVIDS		GENMASK(11, 0)
+
+// FWVLANTSR0
+#define VLANTS			BIT(31)
+#define VLANHLDS		BIT(10)
+#define VLANSLS			BIT(8)
+#define VLANSNF			BIT(1)
+#define VLANSEF			BIT(0)
+
+// FWVLANTSR1
+#define VLANSLVS		GENMASK(6, 0)
+
+// FWVLANTSR2
+#define FWVLANTSR2(i)		(FWVLANTSR20 + (i) * 4)
+
+// FWVLANTSR3
+#define VLANCMES		BIT(21)
+#define VLANEMES		BIT(20)
+#define VLANIPUS		BIT(19)
+#define VLANIPVS		GENMASK(18, 16)
+#define VLANDVS			GENMASK(6, 0)
+
 #define RSW_AGEING_CLK_PER_US	0x140
 #define RSW_AGEING_TIME		300
 
@@ -904,7 +1052,7 @@ enum DIE_DT {
 #define INFO1_DV(port_vector)	((u64)(port_vector) << 48ULL)
 
 /* For reception */
-#define INFO1_SPN(port)		((u64)(port) << 36ULL)
+#define SPN			GENMASK_U64(38, 36)
 
 /* For timestamp descriptor in dptrl (Byte 4 to 7) */
 #define TS_DESC_TSUN(dptrl)	((dptrl) & GENMASK(7, 0))

-- 
2.43.0

[PATCH net-next 05/13] net: renesas: rswitch: add exception path for packets with unknown dst MAC

[Michael Dege]

Packets with unknown MAC address cannot be handled by the HW forwarding.
These need to be forwarded, via an exception path, to the network driver.

Creates a queue for the exeption path. Packets received with unknown
src/dst address need to be passed to the CPU. The received packet does not
have the correct source port information, this is derived from the
descriptor and added to the new queue. The received packet is added to the
new queue and sent to the CPU for MAC learning. The CPU will broadcast the
received packet, to all ports. This is how the HW learns the new MAC
address.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.h      |  1 +
 drivers/net/ethernet/renesas/rswitch_main.c | 80 ++++++++++++++++++++++++++---
 2 files changed, 74 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 15d3fa48b0e3..bf123b564ed1 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -1148,6 +1148,7 @@ struct rswitch_gwca {
 	struct rswitch_gwca_queue *queues;
 	int num_queues;
 	struct rswitch_gwca_queue ts_queue;
+	struct rswitch_gwca_queue *l2_shared_rx_queue;
 	DECLARE_BITMAP(used, RSWITCH_MAX_NUM_QUEUES);
 	u32 tx_irq_bits[RSWITCH_NUM_IRQ_REGS];
 	u32 rx_irq_bits[RSWITCH_NUM_IRQ_REGS];
diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index d404bc41bd1e..f8ceb7f66903 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -680,6 +680,34 @@ static int rswitch_rxdmac_init(struct rswitch_private *priv, unsigned int index)
 	return rswitch_gwca_queue_ext_ts_format(ndev->dev.parent, priv, rdev->rx_queue);
 }
 
+static int rswitch_shared_rx_queue_alloc(struct rswitch_private *priv)
+{
+	struct rswitch_gwca *gwca = &priv->gwca;
+	struct device *dev = &priv->pdev->dev;
+
+	int err;
+
+	gwca->l2_shared_rx_queue = rswitch_gwca_get(priv);
+	if (!gwca->l2_shared_rx_queue)
+		return -EBUSY;
+
+	err = rswitch_gwca_queue_alloc(NULL, priv, gwca->l2_shared_rx_queue, false, RX_RING_SIZE);
+	if (err < 0) {
+		rswitch_gwca_put(priv, gwca->l2_shared_rx_queue);
+		return err;
+	}
+
+	return rswitch_gwca_queue_ext_ts_format(dev, priv, gwca->l2_shared_rx_queue);
+}
+
+static void rswitch_shared_rx_queue_free(struct rswitch_private *priv)
+{
+	struct rswitch_gwca *gwca = &priv->gwca;
+
+	rswitch_gwca_queue_free(&priv->pdev->dev, gwca->l2_shared_rx_queue);
+	rswitch_gwca_put(priv, gwca->l2_shared_rx_queue);
+}
+
 static int rswitch_gwca_hw_init(struct rswitch_private *priv)
 {
 	unsigned int i;
@@ -717,6 +745,12 @@ static int rswitch_gwca_hw_init(struct rswitch_private *priv)
 			return err;
 	}
 
+	err = rswitch_shared_rx_queue_alloc(priv);
+	if (err < 0) {
+		rswitch_shared_rx_queue_free(priv);
+		return err;
+	}
+
 	return rswitch_gwca_change_mode(priv, GWMC_OPC_OPERATION);
 }
 
@@ -940,6 +974,7 @@ static int rswitch_poll(struct napi_struct *napi, int budget)
 			rswitch_enadis_data_irq(priv, rdev->tx_queue->index, true);
 			rswitch_enadis_data_irq(priv, rdev->rx_queue->index, true);
 		}
+		rswitch_enadis_data_irq(priv, priv->gwca.l2_shared_rx_queue->index, true);
 		spin_unlock_irqrestore(&priv->lock, flags);
 	}
 
@@ -952,15 +987,31 @@ static int rswitch_poll(struct napi_struct *napi, int budget)
 	return 0;
 }
 
-static void rswitch_queue_interrupt(struct net_device *ndev)
+static void rswitch_queue_interrupt(struct rswitch_private *priv, struct rswitch_gwca_queue *gq)
 {
-	struct rswitch_device *rdev = netdev_priv(ndev);
+	struct rswitch_ext_ts_desc *desc;
+	struct rswitch_device *rdev;
+	struct net_device *ndev;
+	u32 spn;
+
+	if (gq->index == priv->gwca.l2_shared_rx_queue->index) {
+		desc = &gq->rx_ring[gq->cur];
+		spn = FIELD_GET(SPN, desc->info1);
+		ndev = priv->rdev[spn]->ndev;
+		rdev = netdev_priv(ndev);
+		gq->ndev = ndev;
+		rdev->rx_queue = gq;
+	} else {
+		rdev = netdev_priv(gq->ndev);
+	}
+
 
 	if (napi_schedule_prep(&rdev->napi)) {
-		spin_lock(&rdev->priv->lock);
-		rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, false);
-		rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, false);
-		spin_unlock(&rdev->priv->lock);
+		spin_lock(&priv->lock);
+		rswitch_enadis_data_irq(priv, rdev->tx_queue->index, false);
+		rswitch_enadis_data_irq(priv, rdev->rx_queue->index, false);
+		rswitch_enadis_data_irq(priv, priv->gwca.l2_shared_rx_queue->index, false);
+		spin_unlock(&priv->lock);
 		__napi_schedule(&rdev->napi);
 	}
 }
@@ -978,7 +1029,7 @@ static irqreturn_t rswitch_data_irq(struct rswitch_private *priv, u32 *dis)
 			continue;
 
 		rswitch_ack_data_irq(priv, gq->index);
-		rswitch_queue_interrupt(gq->ndev);
+		rswitch_queue_interrupt(priv, gq);
 	}
 
 	return IRQ_HANDLED;
@@ -1513,6 +1564,14 @@ static int rswitch_serdes_set_params(struct rswitch_device *rdev)
 	return phy_set_speed(rdev->serdes, rdev->etha->speed);
 }
 
+static void rswitch_etha_set_exception_path(struct rswitch_private *priv)
+{
+	iowrite32(FDMACUFEF, priv->addr + FWCEPRC2);
+	iowrite32(FIELD_PREP(EPCSD, priv->gwca.l2_shared_rx_queue->index) |
+			FIELD_PREP(EPCSD, priv->gwca.l2_shared_rx_queue->index),
+			priv->addr + FWCEPTC);
+}
+
 static int rswitch_ether_port_init_one(struct rswitch_device *rdev)
 {
 	int err;
@@ -1566,6 +1625,8 @@ static int rswitch_ether_port_init_all(struct rswitch_private *priv)
 	unsigned int i;
 	int err;
 
+	rswitch_etha_set_exception_path(priv);
+
 	rswitch_for_each_enabled_port(priv, i) {
 		err = rswitch_ether_port_init_one(priv->rdev[i]);
 		if (err)
@@ -1616,6 +1677,7 @@ static int rswitch_open(struct net_device *ndev)
 	bitmap_set(rdev->priv->opened_ports, rdev->port, 1);
 	rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, true);
 	rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, true);
+	rswitch_enadis_data_irq(rdev->priv, rdev->priv->gwca.l2_shared_rx_queue->index, true);
 	spin_unlock_irqrestore(&rdev->priv->lock, flags);
 
 	phy_start(ndev->phydev);
@@ -1642,6 +1704,7 @@ static int rswitch_stop(struct net_device *ndev)
 	spin_lock_irqsave(&rdev->priv->lock, flags);
 	rswitch_enadis_data_irq(rdev->priv, rdev->tx_queue->index, false);
 	rswitch_enadis_data_irq(rdev->priv, rdev->rx_queue->index, false);
+	rswitch_enadis_data_irq(rdev->priv, rdev->priv->gwca.l2_shared_rx_queue->index, false);
 	bitmap_clear(rdev->priv->opened_ports, rdev->port, 1);
 	spin_unlock_irqrestore(&rdev->priv->lock, flags);
 
@@ -2166,6 +2229,9 @@ static int renesas_eth_sw_probe(struct platform_device *pdev)
 	priv->gwca.index = AGENT_INDEX_GWCA;
 	priv->gwca.num_queues = min(RSWITCH_NUM_PORTS * NUM_QUEUES_PER_NDEV,
 				    RSWITCH_MAX_NUM_QUEUES);
+	/* One extra queue for L2 switch reception */
+	priv->gwca.num_queues = min(priv->gwca.num_queues + 1,
+				    RSWITCH_MAX_NUM_QUEUES);
 	priv->gwca.queues = devm_kcalloc(&pdev->dev, priv->gwca.num_queues,
 					 sizeof(*priv->gwca.queues), GFP_KERNEL);
 	if (!priv->gwca.queues)

-- 
2.43.0

[PATCH net-next 06/13] net: renesas: rswitch: add forwarding rules for gwca

[Michael Dege]

Add rules to forward packets from the Ethernet ports to the CPU port (GWCA)
using L2 forwarding instead of port forwarding.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch_l2.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/net/ethernet/renesas/rswitch_l2.c b/drivers/net/ethernet/renesas/rswitch_l2.c
index 709524c8a5c4..21165ec56ce8 100644
--- a/drivers/net/ethernet/renesas/rswitch_l2.c
+++ b/drivers/net/ethernet/renesas/rswitch_l2.c
@@ -93,10 +93,36 @@ static void rswitch_update_l2_hw_forwarding(struct rswitch_private *priv)
 	}
 }
 
+static void rswitch_update_l2_hw_forwarding_gwca(struct rswitch_private *priv)
+{
+	struct rswitch_device *rdev;
+
+	if (priv->offload_brdev) {
+		rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
+			       0, FWPC0_MACSSA | FWPC0_MACDSA | FWPC0_MACRUDA);
+
+		rswitch_for_all_ports(priv, rdev) {
+			rswitch_modify(priv->addr, FWPC2(rdev->etha->index),
+				       FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA)),
+				       0);
+		}
+	} else {
+		rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
+			       FWPC0_MACSSA | FWPC0_MACDSA | FWPC0_MACRUDA,
+			       0);
+		rswitch_for_all_ports(priv, rdev) {
+			rswitch_modify(priv->addr, FWPC2(rdev->etha->index),
+				       0,
+				       FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA)));
+		}
+	}
+}
+
 void rswitch_update_l2_offload(struct rswitch_private *priv)
 {
 	rswitch_update_l2_hw_learning(priv);
 	rswitch_update_l2_hw_forwarding(priv);
+	rswitch_update_l2_hw_forwarding_gwca(priv);
 }
 
 static void rswitch_update_offload_brdev(struct rswitch_private *priv)

-- 
2.43.0

[PATCH net-next 07/13] net: renesas: rswitch: make helper functions available to whole driver

[Michael Dege]

These functions will be needed in L2 and vlan handling. Remove static
declaration and add function prototype to rswitch.h.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.h      |  6 ++++--
 drivers/net/ethernet/renesas/rswitch_main.c | 12 ++++++------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index bf123b564ed1..ff2a84057f01 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* Renesas Ethernet Switch device driver
  *
- * Copyright (C) 2022-2025 Renesas Electronics Corporation
+ * Copyright (C) 2022-2026 Renesas Electronics Corporation
  */
 
 #ifndef __RSWITCH_H__
@@ -1218,5 +1218,7 @@ struct rswitch_private {
 
 bool is_rdev(const struct net_device *ndev);
 void rswitch_modify(void __iomem *addr, enum rswitch_reg reg, u32 clear, u32 set);
-
+int rswitch_reg_wait(void __iomem *addr, u32 offs, u32 mask, u32 expected);
+int rswitch_gwca_change_mode(struct rswitch_private *priv, enum rswitch_gwca_mode mode);
+int rswitch_etha_change_mode(struct rswitch_etha *etha, enum rswitch_etha_mode mode);
 #endif	/* #ifndef __RSWITCH_H__ */
diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index f8ceb7f66903..b16f7aca4a69 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /* Renesas Ethernet Switch device driver
  *
- * Copyright (C) 2022-2025 Renesas Electronics Corporation
+ * Copyright (C) 2022-2026 Renesas Electronics Corporation
  */
 
 #include <linux/clk.h>
@@ -32,7 +32,7 @@
 
 #define RSWITCH_GPTP_OFFSET_S4 0x00018000
 
-static int rswitch_reg_wait(void __iomem *addr, u32 offs, u32 mask, u32 expected)
+int rswitch_reg_wait(void __iomem *addr, u32 offs, u32 mask, u32 expected)
 {
 	u32 val;
 
@@ -168,8 +168,8 @@ static int rswitch_fwd_init(struct rswitch_private *priv)
 }
 
 /* Gateway CPU agent block (GWCA) */
-static int rswitch_gwca_change_mode(struct rswitch_private *priv,
-				    enum rswitch_gwca_mode mode)
+int rswitch_gwca_change_mode(struct rswitch_private *priv,
+			     enum rswitch_gwca_mode mode)
 {
 	int ret;
 
@@ -1153,8 +1153,8 @@ static int rswitch_gwca_ts_request_irqs(struct rswitch_private *priv)
 }
 
 /* Ethernet TSN Agent block (ETHA) and Ethernet MAC IP block (RMAC) */
-static int rswitch_etha_change_mode(struct rswitch_etha *etha,
-				    enum rswitch_etha_mode mode)
+int rswitch_etha_change_mode(struct rswitch_etha *etha,
+			     enum rswitch_etha_mode mode)
 {
 	int ret;
 

-- 
2.43.0

[PATCH net-next 08/13] net: renesas: rswitch: add basic vlan init to rswitch_fwd_init

[Michael Dege]

Add basic vlan related register initialization.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch_main.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index b16f7aca4a69..ac87175b918e 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -120,6 +120,7 @@ static int rswitch_fwd_init(struct rswitch_private *priv)
 	u32 all_ports_mask = GENMASK(RSWITCH_NUM_AGENTS - 1, 0);
 	unsigned int i;
 	u32 reg_val;
+	int ret;
 
 	/* Start with empty configuration */
 	for (i = 0; i < RSWITCH_NUM_AGENTS; i++) {
@@ -154,17 +155,27 @@ static int rswitch_fwd_init(struct rswitch_private *priv)
 	}
 
 	/* For GWCA port, allow direct descriptor forwarding */
-	rswitch_modify(priv->addr, FWPC1(priv->gwca.index), FWPC1_DDE, FWPC1_DDE);
+	rswitch_modify(priv->addr, FWPC1(priv->gwca.index), 0, FWPC1_DDE);
 
 	/* Initialize hardware L2 forwarding table */
 
-	/* Allow entire table to be used for "unsecure" entries */
+	/* Allow entire table to be used for "un-secure" entries */
 	rswitch_modify(priv->addr, FWMACHEC, 0, FWMACHEC_MACHMUE_MASK);
 
 	/* Initialize MAC hash table */
 	iowrite32(FWMACTIM_MACTIOG, priv->addr + FWMACTIM);
 
-	return rswitch_reg_wait(priv->addr, FWMACTIM, FWMACTIM_MACTIOG, 0);
+	ret = rswitch_reg_wait(priv->addr, FWMACTIM, FWMACTIM_MACTIOG, 0);
+	if (ret)
+		return ret;
+
+	/* Allow entire VLAN table to be used for "un-secure" entries */
+	iowrite32(VLANTMUE, priv->addr + FWVLANTEC);
+
+	/* Initialize VLAN table */
+	iowrite32(VLANTIOG, priv->addr + FWVLANTIM);
+
+	return rswitch_reg_wait(priv->addr, FWVLANTIM, VLANTIOG, 0);
 }
 
 /* Gateway CPU agent block (GWCA) */

-- 
2.43.0

[PATCH net-next 09/13] net: renesas: rswitch: update port HW init

[Michael Dege]

Certain Ethernet and cpu port settings need to be updated for vlan
support.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.h      |  4 ----
 drivers/net/ethernet/renesas/rswitch_main.c | 15 ++++++++++++---
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index ff2a84057f01..42c8bbafa27d 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -766,8 +766,6 @@ enum vlan_egress_mode {
 	HW_SC_TAG_VLAN,
 };
 
-#define EAVCC_VEM_SC_TAG	(0x3 << 16)
-
 #define MPIC_PIS		GENMASK(2, 0)
 #define MPIC_PIS_GMII		2
 #define MPIC_PIS_XGMII		4
@@ -806,8 +804,6 @@ enum rswitch_gwca_mode {
 #define GWMTIRM_MTIOG		BIT(0)
 #define GWMTIRM_MTR		BIT(1)
 
-#define GWVCC_VEM_SC_TAG	(0x3 << 16)
-
 #define GWARIRM_ARIOG		BIT(0)
 #define GWARIRM_ARR		BIT(1)
 
diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index ac87175b918e..d1be588fb625 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -735,8 +735,11 @@ static int rswitch_gwca_hw_init(struct rswitch_private *priv)
 	if (err < 0)
 		return err;
 
-	iowrite32(GWVCC_VEM_SC_TAG, priv->addr + GWVCC);
-	iowrite32(0, priv->addr + GWTTFC);
+	iowrite32(0, priv->addr + GWIRC);
+	iowrite32(FIELD_PREP(DQD, DES_RAM_DP), priv->addr + GWRDQDC0);
+	/* Drop frames with unknown tags */
+	iowrite32(UT, priv->addr + GWTTFC);
+
 	iowrite32(lower_32_bits(priv->gwca.linkfix_table_dma), priv->addr + GWDCBAC1);
 	iowrite32(upper_32_bits(priv->gwca.linkfix_table_dma), priv->addr + GWDCBAC0);
 	iowrite32(lower_32_bits(priv->gwca.ts_queue.ring_dma), priv->addr + GWTDCAC10);
@@ -878,6 +881,7 @@ static bool rswitch_rx(struct net_device *ndev, int *quota)
 	limit = boguscnt;
 
 	desc = &gq->rx_ring[gq->cur];
+
 	while ((desc->desc.die_dt & DT_MASK) != DT_FEMPTY) {
 		dma_rmb();
 		skb = rswitch_rx_handle_desc(ndev, gq, desc);
@@ -1267,7 +1271,12 @@ static int rswitch_etha_hw_init(struct rswitch_etha *etha, const u8 *mac)
 	if (err < 0)
 		return err;
 
-	iowrite32(EAVCC_VEM_SC_TAG, etha->addr + EAVCC);
+	iowrite32(0, etha->addr + EAIRC);
+	iowrite32(FIELD_PREP(DQD, DES_RAM_DP), etha->addr + EATDQDC0);
+
+	/* Drop frames with unknown tags */
+	iowrite32(UT, etha->addr + EARTFC);
+
 	rswitch_rmac_setting(etha, mac);
 	rswitch_etha_enable_mii(etha);
 

-- 
2.43.0

[PATCH net-next 10/13] net: renesas: rswitch: clean up is_rdev rswitch_device checking

[Michael Dege]

Add null pointer checking for ndev and remove unnecessay
rswitch_port_check() wrapper function.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch_l2.c   | 15 +++++----------
 drivers/net/ethernet/renesas/rswitch_main.c |  2 +-
 2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch_l2.c b/drivers/net/ethernet/renesas/rswitch_l2.c
index 21165ec56ce8..da8c04dd65e4 100644
--- a/drivers/net/ethernet/renesas/rswitch_l2.c
+++ b/drivers/net/ethernet/renesas/rswitch_l2.c
@@ -162,11 +162,6 @@ static void rswitch_update_offload_brdev(struct rswitch_private *priv)
 	rswitch_update_l2_offload(priv);
 }
 
-static bool rswitch_port_check(const struct net_device *ndev)
-{
-	return is_rdev(ndev);
-}
-
 static void rswitch_port_update_brdev(struct net_device *ndev,
 				      struct net_device *brdev)
 {
@@ -203,7 +198,7 @@ static int rswitch_netdevice_event(struct notifier_block *nb,
 	struct netdev_notifier_changeupper_info *info;
 	struct net_device *brdev;
 
-	if (!rswitch_port_check(ndev))
+	if (!is_rdev(ndev))
 		return NOTIFY_DONE;
 	if (event != NETDEV_CHANGEUPPER)
 		return NOTIFY_DONE;
@@ -258,12 +253,12 @@ static int rswitch_switchdev_event(struct notifier_block *nb,
 
 	if (event == SWITCHDEV_PORT_ATTR_SET) {
 		ret = switchdev_handle_port_attr_set(ndev, ptr,
-						     rswitch_port_check,
+						     is_rdev,
 						     rswitch_port_attr_set);
 		return notifier_from_errno(ret);
 	}
 
-	if (!rswitch_port_check(ndev))
+	if (!is_rdev(ndev))
 		return NOTIFY_DONE;
 
 	return notifier_from_errno(-EOPNOTSUPP);
@@ -282,11 +277,11 @@ static int rswitch_switchdev_blocking_event(struct notifier_block *nb,
 		return -EOPNOTSUPP;
 	case SWITCHDEV_PORT_ATTR_SET:
 		ret = switchdev_handle_port_attr_set(ndev, ptr,
-						     rswitch_port_check,
+						     is_rdev,
 						     rswitch_port_attr_set);
 		break;
 	default:
-		if (!rswitch_port_check(ndev))
+		if (!is_rdev(ndev))
 			return NOTIFY_DONE;
 		ret = -EOPNOTSUPP;
 	}
diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index d1be588fb625..da984027239c 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -1962,7 +1962,7 @@ static const struct net_device_ops rswitch_netdev_ops = {
 
 bool is_rdev(const struct net_device *ndev)
 {
-	return (ndev->netdev_ops == &rswitch_netdev_ops);
+	return ndev && (ndev->netdev_ops == &rswitch_netdev_ops);
 }
 
 static int rswitch_get_ts_info(struct net_device *ndev, struct kernel_ethtool_ts_info *info)

-- 
2.43.0

[PATCH net-next 11/13] net: renesas: rswitch: add passing of rswitch_private into notifiers

[Michael Dege]

Provide struct rswitch_private to notifiers. This will be needed
to access the HW in the notification handlers.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.h      |  5 ++++
 drivers/net/ethernet/renesas/rswitch_l2.c   | 45 ++++++++++++-----------------
 drivers/net/ethernet/renesas/rswitch_l2.h   |  6 ++--
 drivers/net/ethernet/renesas/rswitch_main.c |  4 +--
 4 files changed, 28 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 42c8bbafa27d..6dfc53c6b985 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -1199,6 +1199,11 @@ struct rswitch_private {
 	struct rswitch_etha etha[RSWITCH_NUM_PORTS];
 	struct rswitch_mfwd mfwd;
 
+	/* Notifiers */
+	struct notifier_block rswitch_netdevice_nb;
+	struct notifier_block rswitch_switchdev_nb;
+	struct notifier_block rswitch_switchdev_blocking_nb;
+
 	struct list_head port_list;
 
 	spinlock_t lock;	/* lock interrupt registers' control */
diff --git a/drivers/net/ethernet/renesas/rswitch_l2.c b/drivers/net/ethernet/renesas/rswitch_l2.c
index da8c04dd65e4..596a9fe2c086 100644
--- a/drivers/net/ethernet/renesas/rswitch_l2.c
+++ b/drivers/net/ethernet/renesas/rswitch_l2.c
@@ -289,48 +289,39 @@ static int rswitch_switchdev_blocking_event(struct notifier_block *nb,
 	return notifier_from_errno(ret);
 }
 
-static struct notifier_block rswitch_netdevice_nb = {
-	.notifier_call = rswitch_netdevice_event,
-};
-
-static struct notifier_block rswitch_switchdev_nb = {
-	.notifier_call = rswitch_switchdev_event,
-};
-
-static struct notifier_block rswitch_switchdev_blocking_nb = {
-	.notifier_call = rswitch_switchdev_blocking_event,
-};
-
-int rswitch_register_notifiers(void)
+int rswitch_register_notifiers(struct rswitch_private *priv)
 {
-	int ret;
+	int err;
 
-	ret = register_netdevice_notifier(&rswitch_netdevice_nb);
-	if (ret)
+	priv->rswitch_netdevice_nb.notifier_call = rswitch_netdevice_event;
+	err = register_netdevice_notifier(&priv->rswitch_netdevice_nb);
+	if (err)
 		goto register_netdevice_notifier_failed;
 
-	ret = register_switchdev_notifier(&rswitch_switchdev_nb);
-	if (ret)
+	priv->rswitch_switchdev_nb.notifier_call = rswitch_switchdev_event;
+	err = register_switchdev_notifier(&priv->rswitch_switchdev_nb);
+	if (err)
 		goto register_switchdev_notifier_failed;
 
-	ret = register_switchdev_blocking_notifier(&rswitch_switchdev_blocking_nb);
-	if (ret)
+	priv->rswitch_switchdev_blocking_nb.notifier_call = rswitch_switchdev_blocking_event;
+	err = register_switchdev_blocking_notifier(&priv->rswitch_switchdev_blocking_nb);
+	if (err)
 		goto register_switchdev_blocking_notifier_failed;
 
 	return 0;
 
 register_switchdev_blocking_notifier_failed:
-	unregister_switchdev_notifier(&rswitch_switchdev_nb);
+	unregister_switchdev_notifier(&priv->rswitch_switchdev_nb);
 register_switchdev_notifier_failed:
-	unregister_netdevice_notifier(&rswitch_netdevice_nb);
+	unregister_netdevice_notifier(&priv->rswitch_netdevice_nb);
 register_netdevice_notifier_failed:
 
-	return ret;
+	return err;
 }
 
-void rswitch_unregister_notifiers(void)
+void rswitch_unregister_notifiers(struct rswitch_private *priv)
 {
-	unregister_switchdev_blocking_notifier(&rswitch_switchdev_blocking_nb);
-	unregister_switchdev_notifier(&rswitch_switchdev_nb);
-	unregister_netdevice_notifier(&rswitch_netdevice_nb);
+	unregister_switchdev_blocking_notifier(&priv->rswitch_switchdev_blocking_nb);
+	unregister_switchdev_notifier(&priv->rswitch_switchdev_nb);
+	unregister_netdevice_notifier(&priv->rswitch_netdevice_nb);
 }
diff --git a/drivers/net/ethernet/renesas/rswitch_l2.h b/drivers/net/ethernet/renesas/rswitch_l2.h
index 57050ede8f31..af9780c63c9a 100644
--- a/drivers/net/ethernet/renesas/rswitch_l2.h
+++ b/drivers/net/ethernet/renesas/rswitch_l2.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /* Renesas Ethernet Switch device driver
  *
- * Copyright (C) 2025 Renesas Electronics Corporation
+ * Copyright (C) 2025 - 2026 Renesas Electronics Corporation
  */
 
 #ifndef __RSWITCH_L2_H__
@@ -9,7 +9,7 @@
 
 void rswitch_update_l2_offload(struct rswitch_private *priv);
 
-int rswitch_register_notifiers(void);
-void rswitch_unregister_notifiers(void);
+int rswitch_register_notifiers(struct rswitch_private *priv);
+void rswitch_unregister_notifiers(struct rswitch_private *priv);
 
 #endif	/* #ifndef __RSWITCH_L2_H__ */
diff --git a/drivers/net/ethernet/renesas/rswitch_main.c b/drivers/net/ethernet/renesas/rswitch_main.c
index da984027239c..4e0a481ef403 100644
--- a/drivers/net/ethernet/renesas/rswitch_main.c
+++ b/drivers/net/ethernet/renesas/rswitch_main.c
@@ -2272,7 +2272,7 @@ static int renesas_eth_sw_probe(struct platform_device *pdev)
 	if (list_empty(&priv->port_list))
 		dev_warn(&pdev->dev, "could not initialize any ports\n");
 
-	ret = rswitch_register_notifiers();
+	ret = rswitch_register_notifiers(priv);
 	if (ret) {
 		dev_err(&pdev->dev, "could not register notifiers\n");
 		return ret;
@@ -2311,7 +2311,7 @@ static void renesas_eth_sw_remove(struct platform_device *pdev)
 {
 	struct rswitch_private *priv = platform_get_drvdata(pdev);
 
-	rswitch_unregister_notifiers();
+	rswitch_unregister_notifiers(priv);
 	rswitch_deinit(priv);
 
 	pm_runtime_put(&pdev->dev);

-- 
2.43.0

[PATCH net-next 12/13] net: renesas: rswitch: add handler for FDB notification

[Michael Dege]

The SWITCHDEV_FDB_ADD_TO_DEVICE notification writes the bridge MAC address
to the GWCA and adds a static rule to the MAC table.
The SWITCHDEV_FDB_DEL_TO_DEVICE removes the static rule from the MAC table.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch.h    |   8 ++
 drivers/net/ethernet/renesas/rswitch_l2.c | 205 ++++++++++++++++++++++++++----
 2 files changed, 190 insertions(+), 23 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.h b/drivers/net/ethernet/renesas/rswitch.h
index 6dfc53c6b985..443fc4e49602 100644
--- a/drivers/net/ethernet/renesas/rswitch.h
+++ b/drivers/net/ethernet/renesas/rswitch.h
@@ -1217,6 +1217,14 @@ struct rswitch_private {
 	enum hwtstamp_rx_filters tstamp_rx_ctrl;
 };
 
+struct rswitch_switchdev_event_work {
+	struct work_struct work;
+	struct switchdev_notifier_fdb_info fdb_info;
+	struct net_device *ndev;
+	struct rswitch_private *priv;
+	unsigned long event;
+};
+
 bool is_rdev(const struct net_device *ndev);
 void rswitch_modify(void __iomem *addr, enum rswitch_reg reg, u32 clear, u32 set);
 int rswitch_reg_wait(void __iomem *addr, u32 offs, u32 mask, u32 expected);
diff --git a/drivers/net/ethernet/renesas/rswitch_l2.c b/drivers/net/ethernet/renesas/rswitch_l2.c
index 596a9fe2c086..edfa22676faa 100644
--- a/drivers/net/ethernet/renesas/rswitch_l2.c
+++ b/drivers/net/ethernet/renesas/rswitch_l2.c
@@ -23,7 +23,8 @@ static bool rdev_for_l2_offload(struct rswitch_device *rdev)
 static void rswitch_change_l2_hw_offloading(struct rswitch_device *rdev,
 					    bool start, bool learning)
 {
-	u32 bits = learning ? FWPC0_MACSSA | FWPC0_MACHLA | FWPC0_MACHMA : FWPC0_MACDSA;
+	u32 bits = learning ? FWPC0_MACSSA | FWPC0_MACHLA | FWPC0_MACHMA | FWPC0_MACRUDA :
+			      FWPC0_MACDSA;
 	u32 clear = start ? 0 : bits;
 	u32 set = start ? bits : 0;
 
@@ -82,8 +83,9 @@ static void rswitch_update_l2_hw_forwarding(struct rswitch_private *priv)
 			 *
 			 * Do not allow L2 forwarding to self for hw port.
 			 */
-			iowrite32(FIELD_PREP(FWPC2_LTWFW, fwd_mask | BIT(rdev->port)),
-				  priv->addr + FWPC2(rdev->port));
+			rswitch_modify(priv->addr, FWPC2(rdev->port),
+				       FIELD_PREP(FWPC2_LTWFW, ~(fwd_mask | BIT(rdev->port))),
+				       0);
 		}
 
 		if (new_forwarding_offload && !rdev->forwarding_offloaded)
@@ -192,7 +194,8 @@ static int rswitch_port_update_stp_state(struct net_device *ndev, u8 stp_state)
 }
 
 static int rswitch_netdevice_event(struct notifier_block *nb,
-				   unsigned long event, void *ptr)
+				   unsigned long event,
+				   void *ptr)
 {
 	struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
 	struct netdev_notifier_changeupper_info *info;
@@ -245,25 +248,6 @@ static int rswitch_port_attr_set(struct net_device *ndev, const void *ctx,
 	}
 }
 
-static int rswitch_switchdev_event(struct notifier_block *nb,
-				   unsigned long event, void *ptr)
-{
-	struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
-	int ret;
-
-	if (event == SWITCHDEV_PORT_ATTR_SET) {
-		ret = switchdev_handle_port_attr_set(ndev, ptr,
-						     is_rdev,
-						     rswitch_port_attr_set);
-		return notifier_from_errno(ret);
-	}
-
-	if (!is_rdev(ndev))
-		return NOTIFY_DONE;
-
-	return notifier_from_errno(-EOPNOTSUPP);
-}
-
 static int rswitch_switchdev_blocking_event(struct notifier_block *nb,
 					    unsigned long event, void *ptr)
 {
@@ -289,6 +273,181 @@ static int rswitch_switchdev_blocking_event(struct notifier_block *nb,
 	return notifier_from_errno(ret);
 }
 
+static int rswitch_gwca_write_mac_address(struct rswitch_private *priv, const u8 *mac)
+{
+	int err;
+
+	err = rswitch_gwca_change_mode(priv, GWMC_OPC_CONFIG);
+	if (err < 0)
+		return err;
+
+	iowrite32((mac[0] << 8) | mac[1], priv->addr + GWMAC0);
+	iowrite32((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
+		  priv->addr + GWMAC1);
+
+	return rswitch_gwca_change_mode(priv, GWMC_OPC_OPERATION);
+}
+
+static int rswitch_add_addr_to_mactable(struct rswitch_private *priv, const u8 *mac)
+{
+	u32 index = priv->gwca.l2_shared_rx_queue->index;
+	int err;
+
+	rswitch_modify(priv->addr, FWMACTL0, FWMACTL0_ED, 0);
+	iowrite32((mac[0] << 8) | mac[1], priv->addr + FWMACTL1);
+	iowrite32((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
+		  priv->addr + FWMACTL2);
+	iowrite32(FWMACTL3_DSLV | FWMACTL3_SSLV,
+		  priv->addr + FWMACTL3);
+	iowrite32(FIELD_PREP(FWMACTL4_CSDL, index),
+		  priv->addr + FWMACTL4(GWCA_INDEX));
+	iowrite32(FIELD_PREP(FWMACTL5_DV, BIT(AGENT_INDEX_GWCA)),
+		  priv->addr + FWMACTL5);
+
+	err = rswitch_reg_wait(priv->addr, FWMACTLR, FWMACTLR_L, 0);
+	if (err < 0)
+		return err;
+
+	if (ioread32(priv->addr + FWMACTLR))
+		return NOTIFY_BAD;
+
+	return NOTIFY_DONE;
+}
+
+static int rswitch_del_addr_from_mactable(struct rswitch_private *priv, const u8 *mac)
+{
+	int err;
+
+	rswitch_modify(priv->addr, FWMACTL0, 0, FWMACTL0_ED);
+	iowrite32((mac[0] << 8) | mac[1], priv->addr + FWMACTL1);
+	iowrite32((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5],
+		  priv->addr + FWMACTL2);
+	iowrite32(FWMACTL3_DSLV | FWMACTL3_SSLV,
+		  priv->addr + FWMACTL3);
+	iowrite32(FIELD_PREP(FWMACTL4_CSDL, BIT(0)),
+		  priv->addr + FWMACTL4(GWCA_INDEX));
+	iowrite32(FIELD_PREP(FWMACTL5_DV, BIT(AGENT_INDEX_GWCA)),
+		  priv->addr + FWMACTL5);
+
+	err = rswitch_reg_wait(priv->addr, FWMACTLR, FWMACTLR_L, 0);
+	if (err < 0)
+		return err;
+
+	err = ioread32(priv->addr + FWMACTLR);
+	if (err)
+		return NOTIFY_BAD;
+
+	return NOTIFY_DONE;
+}
+
+static void rswitch_switchdev_bridge_fdb_event_work(struct work_struct *work)
+{
+	struct rswitch_switchdev_event_work *switchdev_work;
+	struct rswitch_device *rdev;
+	struct net_device *ndev;
+
+	switchdev_work = container_of(work, struct rswitch_switchdev_event_work, work);
+	ndev = switchdev_work->ndev;
+
+	rtnl_lock();
+
+	/* Unfortunately all net_device members point to br0, there is no simple way to check
+	 * if the event was triggered by a port device setting.
+	 */
+	rswitch_for_all_ports(switchdev_work->priv, rdev) {
+		if (ether_addr_equal(rdev->ndev->dev_addr, switchdev_work->fdb_info.addr))
+			goto out;
+	}
+
+	/* Handle only bridge device */
+	if (is_rdev(ndev))
+		goto out;
+
+	switch (switchdev_work->event) {
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
+		rswitch_gwca_write_mac_address(switchdev_work->priv, switchdev_work->fdb_info.addr);
+		rswitch_add_addr_to_mactable(switchdev_work->priv, switchdev_work->fdb_info.addr);
+		break;
+	case SWITCHDEV_FDB_DEL_TO_DEVICE:
+		rswitch_del_addr_from_mactable(switchdev_work->priv, switchdev_work->fdb_info.addr);
+		break;
+	default:
+		break;
+	}
+
+out:
+	rtnl_unlock();
+
+	kfree(switchdev_work->fdb_info.addr);
+	kfree(switchdev_work);
+	dev_put(ndev);
+}
+
+/* called under rcu_read_lock() */
+static int rswitch_switchdev_event(struct notifier_block *nb,
+				   unsigned long event,
+				   void *ptr)
+{
+	struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
+	struct rswitch_switchdev_event_work *switchdev_work;
+	struct switchdev_notifier_fdb_info *fdb_info;
+	struct switchdev_notifier_info *info = ptr;
+	struct rswitch_private *priv;
+	int err;
+
+	priv = container_of(nb, struct rswitch_private, rswitch_switchdev_nb);
+
+	switch (event) {
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
+		fallthrough;
+	case SWITCHDEV_FDB_DEL_TO_DEVICE:
+		switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
+
+		if (!switchdev_work)
+			return NOTIFY_BAD;
+
+		switchdev_work->ndev = info->dev;
+		switchdev_work->priv = priv;
+		switchdev_work->event = event;
+
+		fdb_info = container_of(info,
+					struct switchdev_notifier_fdb_info,
+					info);
+
+		INIT_WORK(&switchdev_work->work, rswitch_switchdev_bridge_fdb_event_work);
+
+		memcpy(&switchdev_work->fdb_info, ptr, sizeof(switchdev_work->fdb_info));
+
+		switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
+		if (!switchdev_work->fdb_info.addr)
+			goto err_addr_alloc;
+
+		ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
+				fdb_info->addr);
+		dev_hold(ndev);
+		queue_work(system_long_wq, &switchdev_work->work);
+
+		break;
+	case SWITCHDEV_PORT_ATTR_SET:
+		err = switchdev_handle_port_attr_set(ndev, ptr,
+						     is_rdev,
+						     rswitch_port_attr_set);
+		return notifier_from_errno(err);
+
+		if (!is_rdev(ndev))
+			return NOTIFY_DONE;
+
+		return notifier_from_errno(-EOPNOTSUPP);
+	}
+
+	return NOTIFY_DONE;
+
+err_addr_alloc:
+	kfree(switchdev_work);
+
+	return NOTIFY_BAD;
+}
+
 int rswitch_register_notifiers(struct rswitch_private *priv)
 {
 	int err;

-- 
2.43.0

[PATCH net-next 13/13] net: renesas: rswitch: add vlan aware switching

[Michael Dege]

Add vlan support to L2 HW bridge.

On R-Car S4 there is limited vlan support, which is not fully
802.1Q compliant. The aim of this driver addition is to get as
close as possible to the correct behavior. Limitations are:
- all ports should be in the same default vlan
- default vlans are not stripped on egress.

Signed-off-by: Michael Dege <michael.dege@renesas.com>
---
 drivers/net/ethernet/renesas/rswitch_l2.c | 406 ++++++++++++++++++++++++++----
 1 file changed, 357 insertions(+), 49 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rswitch_l2.c b/drivers/net/ethernet/renesas/rswitch_l2.c
index edfa22676faa..16a519961725 100644
--- a/drivers/net/ethernet/renesas/rswitch_l2.c
+++ b/drivers/net/ethernet/renesas/rswitch_l2.c
@@ -7,6 +7,7 @@
 #include <linux/err.h>
 #include <linux/etherdevice.h>
 #include <linux/if_bridge.h>
+#include <linux/if_vlan.h>
 #include <linux/kernel.h>
 #include <net/switchdev.h>
 
@@ -177,22 +178,6 @@ static void rswitch_port_update_brdev(struct net_device *ndev,
 	rswitch_update_offload_brdev(rdev->priv);
 }
 
-static int rswitch_port_update_stp_state(struct net_device *ndev, u8 stp_state)
-{
-	struct rswitch_device *rdev;
-
-	if (!is_rdev(ndev))
-		return -ENODEV;
-
-	rdev = netdev_priv(ndev);
-	rdev->learning_requested = (stp_state == BR_STATE_LEARNING ||
-				    stp_state == BR_STATE_FORWARDING);
-	rdev->forwarding_requested = (stp_state == BR_STATE_FORWARDING);
-	rswitch_update_l2_offload(rdev->priv);
-
-	return 0;
-}
-
 static int rswitch_netdevice_event(struct notifier_block *nb,
 				   unsigned long event,
 				   void *ptr)
@@ -216,61 +201,395 @@ static int rswitch_netdevice_event(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-static int rswitch_update_ageing_time(struct net_device *ndev, clock_t time)
+static int rswitch_port_update_stp_state(struct net_device *ndev, u8 stp_state)
 {
-	struct rswitch_device *rdev = netdev_priv(ndev);
-	u32 reg_val;
+	struct rswitch_device *rdev;
 
 	if (!is_rdev(ndev))
 		return -ENODEV;
 
+	rdev = netdev_priv(ndev);
+	rdev->learning_requested = (stp_state == BR_STATE_LEARNING ||
+				    stp_state == BR_STATE_FORWARDING);
+	rdev->forwarding_requested = (stp_state == BR_STATE_FORWARDING);
+	rswitch_update_l2_offload(rdev->priv);
+
+	return 0;
+}
+
+static int rswitch_update_ageing_time(struct rswitch_private *priv, clock_t time)
+{
+	u32 reg_val;
+
 	if (!FIELD_FIT(FWMACAGC_MACAGT, time))
 		return -EINVAL;
 
 	reg_val = FIELD_PREP(FWMACAGC_MACAGT, time);
 	reg_val |= FWMACAGC_MACAGE | FWMACAGC_MACAGSL;
-	iowrite32(reg_val, rdev->priv->addr + FWMACAGC);
+	iowrite32(reg_val, priv->addr + FWMACAGC);
 
 	return 0;
 }
 
-static int rswitch_port_attr_set(struct net_device *ndev, const void *ctx,
-				 const struct switchdev_attr *attr,
-				 struct netlink_ext_ack *extack)
+static void rswitch_update_vlan_filtering(struct rswitch_private *priv,
+					  bool vlan_filtering)
+{
+	if (vlan_filtering)
+		rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
+			       0, FWPC0_VLANSA | FWPC0_VLANRU);
+	else
+		rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
+			       FWPC0_VLANSA | FWPC0_VLANRU, 0);
+}
+
+static int rswitch_handle_port_attr_set(struct net_device *ndev,
+					struct notifier_block *nb,
+					struct switchdev_notifier_port_attr_info *info)
 {
+	const struct switchdev_attr *attr = info->attr;
+	struct rswitch_private *priv;
+	int err;
+
+	priv = container_of(nb, struct rswitch_private, rswitch_switchdev_blocking_nb);
+
 	switch (attr->id) {
 	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
-		return rswitch_port_update_stp_state(ndev, attr->u.stp_state);
+		err = rswitch_port_update_stp_state(ndev, attr->u.stp_state);
+
+		break;
 	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
-		return rswitch_update_ageing_time(ndev, attr->u.ageing_time);
+		err = rswitch_update_ageing_time(priv, attr->u.ageing_time);
+
+		break;
+	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
+		rswitch_update_vlan_filtering(priv, attr->u.vlan_filtering);
+
+		break;
+	case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
+
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	if (err < 0)
+		return err;
+
+	info->handled = true;
+
+	return NOTIFY_DONE;
+}
+
+static int rswitch_read_vlan_table(struct rswitch_private *priv, u16 vid,
+				   u32 *vlanslvs, u32 *vlandvs)
+{
+	int err;
+
+	iowrite32(FIELD_PREP(VLANVIDS, vid), priv->addr + FWVLANTS);
+	err = rswitch_reg_wait(priv->addr, FWVLANTSR0, VLANTS, 0);
+	if (err < 0)
+		return err;
+
+	/* check if vlans are present in table */
+	if (!(ioread32(priv->addr + FWVLANTSR0) & VLANSNF)) {
+		*vlanslvs = (ioread32(priv->addr + FWVLANTSR1) & VLANSLVS);
+		*vlandvs = (ioread32(priv->addr + FWVLANTSR3) & VLANDVS);
+	}
+
+	return 0;
+}
+
+static int rswitch_write_vlan_table(struct rswitch_private *priv, u16 vid, u32 index)
+{
+	u32 vlancsdl = priv->gwca.l2_shared_rx_queue->index;
+	u32 vlanslvs = 0, vlandvs = 0;
+	int err;
+
+	err = rswitch_read_vlan_table(priv, vid, &vlanslvs, &vlandvs);
+	if (err < 0)
+		return err;
+
+	rswitch_modify(priv->addr, FWVLANTL0, VLANED, 0);
+	iowrite32(FIELD_PREP(VLANVIDL, vid), priv->addr + FWVLANTL1);
+
+	vlanslvs |= BIT(index);
+	vlandvs  |= BIT(index);
+	iowrite32(FIELD_PREP(VLANSLVL, vlanslvs), priv->addr + FWVLANTL2);
+	iowrite32(FIELD_PREP(VLANCSDL, vlancsdl), priv->addr + FWVLANTL3(GWCA_INDEX));
+	iowrite32(FIELD_PREP(VLANDVL, vlandvs), priv->addr + FWVLANTL4);
+
+	return rswitch_reg_wait(priv->addr, FWVLANTLR, VLANTL, 0);
+}
+
+static int rswitch_erase_vlan_table(struct rswitch_private *priv, u16 vid, u32 index)
+{
+	u32 vlanslvs = 0, vlandvs = 0;
+	int err;
+
+	err = rswitch_read_vlan_table(priv, vid, &vlanslvs, &vlandvs);
+	if (err < 0)
+		return err;
+
+	vlanslvs &= ~BIT(index);
+	vlandvs  &= ~BIT(index);
+
+	/* only erase empty vlan table entries */
+	if (vlanslvs == 0)
+		rswitch_modify(priv->addr, FWVLANTL0, 0, VLANED);
+
+	iowrite32(FIELD_PREP(VLANVIDL, vid), priv->addr + FWVLANTL1);
+	iowrite32(FIELD_PREP(VLANSLVL, vlanslvs), priv->addr + FWVLANTL2);
+	iowrite32(FIELD_PREP(VLANDVL, vlandvs), priv->addr + FWVLANTL4);
+
+	return rswitch_reg_wait(priv->addr, FWVLANTLR, VLANTL, 0);
+}
+
+static int rswitch_port_set_vlan_tag(struct rswitch_etha *etha,
+				     struct switchdev_obj_port_vlan *p_vlan,
+				     bool delete)
+{
+	u32 err, vem_val;
+
+	err = rswitch_etha_change_mode(etha, EAMC_OPC_CONFIG);
+	if (err < 0)
+		return err;
+
+	rswitch_modify(etha->addr, EAVCC, VIM, 0);
+
+	if (((ioread32(etha->addr + EAVTC) & CTV) == p_vlan->vid) && delete) {
+		rswitch_modify(etha->addr, EAVTC, CTV, 0);
+		rswitch_modify(etha->addr, EAVCC, VEM, 0);
+	} else if (!delete) {
+		if ((p_vlan->flags & BRIDGE_VLAN_INFO_PVID) &&
+		    (p_vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED))
+			vem_val = FIELD_PREP(VEM, C_TAG_VLAN);
+		else if (p_vlan->flags & BRIDGE_VLAN_INFO_PVID)
+			vem_val = FIELD_PREP(VEM, HW_C_TAG_VLAN);
+		else
+			vem_val = 0;
+		rswitch_modify(etha->addr, EAVCC, VEM, vem_val);
+		rswitch_modify(etha->addr, EAVTC, CTV, FIELD_PREP(CTV, p_vlan->vid));
+	}
+
+	return rswitch_etha_change_mode(etha, EAMC_OPC_OPERATION);
+}
+
+static int rswitch_gwca_set_vlan_tag(struct rswitch_private *priv,
+				     struct switchdev_obj_port_vlan *p_vlan,
+				     bool delete)
+{
+	u32 err, vem_val;
+
+	err = rswitch_gwca_change_mode(priv, GWMC_OPC_CONFIG);
+	if (err < 0)
+		return err;
+
+	rswitch_modify(priv->addr, GWVCC, VIM, 0);
+
+	if (((ioread32(priv->addr + GWVTC) & CTV) == p_vlan->vid) && delete) {
+		rswitch_modify(priv->addr, GWVTC, CTV, 0);
+		rswitch_modify(priv->addr, GWVCC, VEM, 0);
+	} else  if (!delete) {
+		if ((p_vlan->flags & BRIDGE_VLAN_INFO_PVID) &&
+		    (p_vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED))
+			vem_val = FIELD_PREP(VEM, C_TAG_VLAN);
+		else if (p_vlan->flags & BRIDGE_VLAN_INFO_PVID)
+			vem_val = FIELD_PREP(VEM, HW_C_TAG_VLAN);
+		else
+			vem_val = 0;
+		rswitch_modify(priv->addr, GWVCC, VEM, vem_val);
+		rswitch_modify(priv->addr, GWVTC, CTV, FIELD_PREP(CTV, p_vlan->vid));
+	}
+
+	return rswitch_gwca_change_mode(priv, GWMC_OPC_OPERATION);
+}
+
+static int rswitch_port_obj_do_add(struct net_device *ndev,
+				   struct switchdev_obj_port_vlan *p_vlan)
+{
+	struct rswitch_device *rdev = netdev_priv(ndev);
+	struct rswitch_private *priv = rdev->priv;
+	struct rswitch_etha *etha = rdev->etha;
+	int err;
+
+	/* Set Rswitch VLAN mode */
+	iowrite32(br_vlan_enabled(rdev->brdev) ? FIELD_PREP(FWGC_SVM, C_TAG) : 0,
+		  priv->addr + FWGC);
+
+	err = rswitch_write_vlan_table(priv, p_vlan->vid, etha->index);
+	if (err < 0)
+		return err;
+
+	/* If the default vlan for this port has been set, don't overwrite it. */
+	if (ioread32(etha->addr + EAVCC))
+		return NOTIFY_DONE;
+
+	if (br_vlan_enabled(rdev->brdev))
+		rswitch_modify(priv->addr, FWPC0(etha->index), 0, FWPC0_VLANSA | FWPC0_VLANRU);
+
+	rswitch_modify(priv->addr, FWPC2(AGENT_INDEX_GWCA),
+		       FIELD_PREP(FWPC2_LTWFW, BIT(etha->index)),
+		       0);
+
+	return rswitch_port_set_vlan_tag(etha, p_vlan, false);
+}
+
+static int rswitch_port_obj_do_add_gwca(struct net_device *ndev,
+					struct rswitch_private *priv,
+					struct switchdev_obj_port_vlan *p_vlan)
+{
+	int err;
+
+	if (!(p_vlan->flags & BRIDGE_VLAN_INFO_BRENTRY))
+		return NOTIFY_DONE;
+
+	/* Set Rswitch VLAN mode */
+	iowrite32(br_vlan_enabled(ndev) ? FIELD_PREP(FWGC_SVM, C_TAG) : 0, priv->addr + FWGC);
+
+	err = rswitch_write_vlan_table(priv, p_vlan->vid, AGENT_INDEX_GWCA);
+	if (err < 0)
+		return err;
+
+	/* If the default vlan for this port has been set, don't overwrite it. */
+	if (ioread32(priv->addr + GWVCC))
+		return NOTIFY_DONE;
+
+	return rswitch_gwca_set_vlan_tag(priv, p_vlan, false);
+}
+
+static int rswitch_port_obj_do_del(struct net_device *ndev,
+				   struct switchdev_obj_port_vlan *p_vlan)
+{
+	struct rswitch_device *rdev = netdev_priv(ndev);
+	struct rswitch_private *priv = rdev->priv;
+	struct rswitch_etha *etha = rdev->etha;
+	u32 err;
+
+	err = rswitch_port_set_vlan_tag(etha, p_vlan, true);
+	if (err < 0)
+		return err;
+
+	rswitch_modify(priv->addr, FWPC0(etha->index), FWPC0_VLANSA | FWPC0_VLANRU, 0);
+	rswitch_modify(priv->addr, FWPC2(AGENT_INDEX_GWCA), 0,
+		       FIELD_PREP(FWPC2_LTWFW, BIT(etha->index)));
+	rswitch_modify(priv->addr, FWPC2(rdev->port),
+		       0, FIELD_PREP(FWPC2_LTWFW, GENMASK(RSWITCH_NUM_AGENTS - 1, 0)));
+
+	return rswitch_erase_vlan_table(priv, p_vlan->vid, etha->index);
+}
+
+static int rswitch_port_obj_do_del_gwca(struct net_device *ndev,
+					struct rswitch_private *priv,
+					struct switchdev_obj_port_vlan *p_vlan)
+{
+	int err;
+
+	err = rswitch_gwca_set_vlan_tag(priv, p_vlan, true);
+	if (err < 0)
+		return err;
+
+	rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
+		       FWPC0_VLANSA | FWPC0_VLANRU,
+		       0);
+
+	return rswitch_erase_vlan_table(priv, p_vlan->vid, AGENT_INDEX_GWCA);
+}
+
+static int rswitch_handle_port_obj_add(struct net_device *ndev,
+				       struct notifier_block *nb,
+				       struct switchdev_notifier_port_obj_info *info)
+{
+	struct switchdev_obj_port_vlan *p_vlan = SWITCHDEV_OBJ_PORT_VLAN(info->obj);
+	struct rswitch_private *priv;
+	int err;
+
+	priv = container_of(nb, struct rswitch_private, rswitch_switchdev_blocking_nb);
+
+	if ((p_vlan->flags & BRIDGE_VLAN_INFO_MASTER) ||
+	    (p_vlan->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) ||
+	    (p_vlan->flags & BRIDGE_VLAN_INFO_RANGE_END) ||
+	    (p_vlan->flags & BRIDGE_VLAN_INFO_ONLY_OPTS))
+		return NOTIFY_DONE;
+
+	switch (info->obj->id) {
+	case SWITCHDEV_OBJ_ID_PORT_VLAN:
+		if (!is_rdev(ndev))
+			err = rswitch_port_obj_do_add_gwca(ndev, priv, p_vlan);
+		else
+			err = rswitch_port_obj_do_add(ndev, p_vlan);
+
+		if (err < 0)
+			return err;
+
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
+
+	info->handled = true;
+
+	return NOTIFY_DONE;
+}
+
+static int rswitch_handle_port_obj_del(struct net_device *ndev,
+				       struct notifier_block *nb,
+				       struct switchdev_notifier_port_obj_info *info)
+{
+	struct switchdev_obj_port_vlan *p_vlan = SWITCHDEV_OBJ_PORT_VLAN(info->obj);
+	struct rswitch_private *priv;
+	int err;
+
+	priv = container_of(nb, struct rswitch_private, rswitch_switchdev_blocking_nb);
+
+	if ((p_vlan->flags & BRIDGE_VLAN_INFO_MASTER) ||
+	    (p_vlan->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) ||
+	    (p_vlan->flags & BRIDGE_VLAN_INFO_RANGE_END) ||
+	    (p_vlan->flags & BRIDGE_VLAN_INFO_ONLY_OPTS))
+		return NOTIFY_DONE;
+
+	switch (info->obj->id) {
+	case SWITCHDEV_OBJ_ID_PORT_VLAN:
+		if (!is_rdev(ndev))
+			err = rswitch_port_obj_do_del_gwca(ndev, priv, p_vlan);
+		else
+			err = rswitch_port_obj_do_del(ndev, p_vlan);
+
+		if (err < 0)
+			return err;
+
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	info->handled = true;
+
+	return NOTIFY_DONE;
 }
 
 static int rswitch_switchdev_blocking_event(struct notifier_block *nb,
-					    unsigned long event, void *ptr)
+					    unsigned long event,
+					    void *ptr)
 {
 	struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
-	int ret;
+	int err;
 
 	switch (event) {
 	case SWITCHDEV_PORT_OBJ_ADD:
-		return -EOPNOTSUPP;
+		err = rswitch_handle_port_obj_add(ndev, nb, ptr);
+
+		return notifier_from_errno(err);
 	case SWITCHDEV_PORT_OBJ_DEL:
-		return -EOPNOTSUPP;
+		err = rswitch_handle_port_obj_del(ndev, nb, ptr);
+
+		return notifier_from_errno(err);
 	case SWITCHDEV_PORT_ATTR_SET:
-		ret = switchdev_handle_port_attr_set(ndev, ptr,
-						     is_rdev,
-						     rswitch_port_attr_set);
-		break;
-	default:
-		if (!is_rdev(ndev))
-			return NOTIFY_DONE;
-		ret = -EOPNOTSUPP;
+		err = rswitch_handle_port_attr_set(ndev, nb, ptr);
+
+		return notifier_from_errno(err);
 	}
 
-	return notifier_from_errno(ret);
+	return NOTIFY_DONE;
 }
 
 static int rswitch_gwca_write_mac_address(struct rswitch_private *priv, const u8 *mac)
@@ -393,7 +712,6 @@ static int rswitch_switchdev_event(struct notifier_block *nb,
 	struct switchdev_notifier_fdb_info *fdb_info;
 	struct switchdev_notifier_info *info = ptr;
 	struct rswitch_private *priv;
-	int err;
 
 	priv = container_of(nb, struct rswitch_private, rswitch_switchdev_nb);
 
@@ -428,16 +746,6 @@ static int rswitch_switchdev_event(struct notifier_block *nb,
 		queue_work(system_long_wq, &switchdev_work->work);
 
 		break;
-	case SWITCHDEV_PORT_ATTR_SET:
-		err = switchdev_handle_port_attr_set(ndev, ptr,
-						     is_rdev,
-						     rswitch_port_attr_set);
-		return notifier_from_errno(err);
-
-		if (!is_rdev(ndev))
-			return NOTIFY_DONE;
-
-		return notifier_from_errno(-EOPNOTSUPP);
 	}
 
 	return NOTIFY_DONE;

-- 
2.43.0

Re: [PATCH net-next 06/13] net: renesas: rswitch: add forwarding rules for gwca

[Geert Uytterhoeven]

Hi Michael,

On Tue, 17 Mar 2026 at 10:45, Michael Dege <michael.dege@renesas.com> wrote:
> Add rules to forward packets from the Ethernet ports to the CPU port (GWCA)
> using L2 forwarding instead of port forwarding.
>
> Signed-off-by: Michael Dege <michael.dege@renesas.com>

Thanks for your patch!

> --- a/drivers/net/ethernet/renesas/rswitch_l2.c
> +++ b/drivers/net/ethernet/renesas/rswitch_l2.c
> @@ -93,10 +93,36 @@ static void rswitch_update_l2_hw_forwarding(struct rswitch_private *priv)
>         }
>  }
>
> +static void rswitch_update_l2_hw_forwarding_gwca(struct rswitch_private *priv)
> +{
> +       struct rswitch_device *rdev;
> +
> +       if (priv->offload_brdev) {
> +               rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
> +                              0, FWPC0_MACSSA | FWPC0_MACDSA | FWPC0_MACRUDA);
> +
> +               rswitch_for_all_ports(priv, rdev) {
> +                       rswitch_modify(priv->addr, FWPC2(rdev->etha->index),
> +                                      FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA)),
> +                                      0);
> +               }
> +       } else {
> +               rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
> +                              FWPC0_MACSSA | FWPC0_MACDSA | FWPC0_MACRUDA,
> +                              0);
> +               rswitch_for_all_ports(priv, rdev) {
> +                       rswitch_modify(priv->addr, FWPC2(rdev->etha->index),
> +                                      0,
> +                                      FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA)));
> +               }
> +       }
> +}

This looks a bit hard to read: are the bitfield values in the two
branches the same or not?

I came up with the following, which avoids duplication of the field values,
and of the control logic, but I am still not 100% happy with it:

    u32 fwpc0_clr, fwpc0_set, fwpc2_clr, fwpc2_set;

    fwpc0_clr = fwpc0_set = FWPC0_MACSSA | FWPC0_MACDSA | FWPC0_MACRUDA;
    fwpc2_clr = fwpc2_set = FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA);
    if (priv->offload_brdev) {
            fwpc0_clr = fwpc2_set = 0;
    } else {
            fwpc0_set = fwpc2_clr = 0;
    }

    rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA), fwpc0_clr, fwpc0_set);

    rswitch_for_all_ports(priv, rdev) {
            rswitch_modify(priv->addr, FWPC2(rdev->etha->index), fwpc2_clr,
                           fwpc2_set);
    }

Can this be improved?
Thanks!

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

RE: [PATCH net-next 06/13] net: renesas: rswitch: add forwarding rules for gwca

[Michael Dege]

Hello Geert,

> -----Original Message-----
> From: Geert Uytterhoeven <geert@linux-m68k.org>
> Sent: Tuesday, March 17, 2026 5:15 PM
> To: Michael Dege <michael.dege@renesas.com>
> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>; Andrew Lunn <andrew+netdev@lunn.ch>; David
> S. Miller <davem@davemloft.net>; Eric Dumazet <edumazet@google.com>; Jakub Kicinski <kuba@kernel.org>;
> Paolo Abeni <pabeni@redhat.com>; netdev@vger.kernel.org; linux-renesas-soc@vger.kernel.org; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH net-next 06/13] net: renesas: rswitch: add forwarding rules for gwca
> 
> Hi Michael,
> 
> On Tue, 17 Mar 2026 at 10:45, Michael Dege <michael.dege@renesas.com> wrote:
> > Add rules to forward packets from the Ethernet ports to the CPU port
> > (GWCA) using L2 forwarding instead of port forwarding.
> >
> > Signed-off-by: Michael Dege <michael.dege@renesas.com>
> 
> Thanks for your patch!
> 
> > --- a/drivers/net/ethernet/renesas/rswitch_l2.c
> > +++ b/drivers/net/ethernet/renesas/rswitch_l2.c
> > @@ -93,10 +93,36 @@ static void rswitch_update_l2_hw_forwarding(struct rswitch_private *priv)
> >         }
> >  }
> >
> > +static void rswitch_update_l2_hw_forwarding_gwca(struct
> > +rswitch_private *priv) {
> > +       struct rswitch_device *rdev;
> > +
> > +       if (priv->offload_brdev) {
> > +               rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
> > +                              0, FWPC0_MACSSA | FWPC0_MACDSA |
> > + FWPC0_MACRUDA);
> > +
> > +               rswitch_for_all_ports(priv, rdev) {
> > +                       rswitch_modify(priv->addr, FWPC2(rdev->etha->index),
> > +                                      FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA)),
> > +                                      0);
> > +               }
> > +       } else {
> > +               rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA),
> > +                              FWPC0_MACSSA | FWPC0_MACDSA | FWPC0_MACRUDA,
> > +                              0);
> > +               rswitch_for_all_ports(priv, rdev) {
> > +                       rswitch_modify(priv->addr, FWPC2(rdev->etha->index),
> > +                                      0,
> > +                                      FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA)));
> > +               }
> > +       }
> > +}
> 
> This looks a bit hard to read: are the bitfield values in the two branches the same or not?
> 
> I came up with the following, which avoids duplication of the field values, and of the control logic,
> but I am still not 100% happy with it:
> 
>     u32 fwpc0_clr, fwpc0_set, fwpc2_clr, fwpc2_set;
> 
>     fwpc0_clr = fwpc0_set = FWPC0_MACSSA | FWPC0_MACDSA | FWPC0_MACRUDA;
>     fwpc2_clr = fwpc2_set = FIELD_PREP(FWPC2_LTWFW, BIT(AGENT_INDEX_GWCA);
>     if (priv->offload_brdev) {
>             fwpc0_clr = fwpc2_set = 0;
>     } else {
>             fwpc0_set = fwpc2_clr = 0;
>     }
> 
>     rswitch_modify(priv->addr, FWPC0(AGENT_INDEX_GWCA), fwpc0_clr, fwpc0_set);
> 
>     rswitch_for_all_ports(priv, rdev) {
>             rswitch_modify(priv->addr, FWPC2(rdev->etha->index), fwpc2_clr,
>                            fwpc2_set);
>     }
> 
> Can this be improved?

Thank you very much for your comment. I will rework the function and re-send it.

Best regards,

Michael

> Thanks!
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But when I'm talking to
> journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds

Re: [PATCH net-next 13/13] net: renesas: rswitch: add vlan aware switching

[kernel test robot]

Hi Michael,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681]

url:    https://github.com/intel-lab-lkp/linux/commits/Michael-Dege/net-renesas-rswitch-improve-port-change-mode-functions/20260318-221709
base:   1f318b96cc84d7c2ab792fcc0bfd42a7ca890681
patch link:    https://lore.kernel.org/r/20260317-rswitch_add_vlans-v1-13-3a57bfa0f2d1%40renesas.com
patch subject: [PATCH net-next 13/13] net: renesas: rswitch: add vlan aware switching
config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20260319/202603190927.5oLw58VC-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 4abb927bacf37f18f6359a41639a6d1b3bffffb5)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260319/202603190927.5oLw58VC-lkp@intel.com/reproduce)

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/202603190927.5oLw58VC-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/renesas/rswitch_l2.c:268:7: warning: variable 'err' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
     268 |         case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
         |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/net/ethernet/renesas/rswitch_l2.c:275:6: note: uninitialized use occurs here
     275 |         if (err < 0)
         |             ^~~
   drivers/net/ethernet/renesas/rswitch_l2.c:264:7: warning: variable 'err' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
     264 |         case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
         |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/net/ethernet/renesas/rswitch_l2.c:275:6: note: uninitialized use occurs here
     275 |         if (err < 0)
         |             ^~~
   drivers/net/ethernet/renesas/rswitch_l2.c:251:9: note: initialize the variable 'err' to silence this warning
     251 |         int err;
         |                ^
         |                 = 0
   2 warnings generated.


vim +/err +268 drivers/net/ethernet/renesas/rswitch_l2.c

   244	
   245	static int rswitch_handle_port_attr_set(struct net_device *ndev,
   246						struct notifier_block *nb,
   247						struct switchdev_notifier_port_attr_info *info)
   248	{
   249		const struct switchdev_attr *attr = info->attr;
   250		struct rswitch_private *priv;
   251		int err;
   252	
   253		priv = container_of(nb, struct rswitch_private, rswitch_switchdev_blocking_nb);
   254	
   255		switch (attr->id) {
   256		case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
   257			err = rswitch_port_update_stp_state(ndev, attr->u.stp_state);
   258	
   259			break;
   260		case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
   261			err = rswitch_update_ageing_time(priv, attr->u.ageing_time);
   262	
   263			break;
   264		case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
   265			rswitch_update_vlan_filtering(priv, attr->u.vlan_filtering);
   266	
   267			break;
 > 268		case SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED:
   269	
   270			break;
   271		default:
   272			return -EOPNOTSUPP;
   273		}
   274	
   275		if (err < 0)
   276			return err;
   277	
   278		info->handled = true;
   279	
   280		return NOTIFY_DONE;
   281	}
   282	

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