can: kvaser_pciefd: Simplify identification of physical CAN interfaces

index 09510663988c..c8f530ef416e 100644
@@ -66,6 +66,7 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
 #define KVASER_PCIEFD_KCAN_FIFO_LAST_REG 0x180
 #define KVASER_PCIEFD_KCAN_CTRL_REG 0x2c0
 #define KVASER_PCIEFD_KCAN_CMD_REG 0x400
+#define KVASER_PCIEFD_KCAN_IOC_REG 0x404
 #define KVASER_PCIEFD_KCAN_IEN_REG 0x408
 #define KVASER_PCIEFD_KCAN_IRQ_REG 0x410
 #define KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG 0x414

@@ -136,6 +137,9 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
 /* Request status packet */
 #define KVASER_PCIEFD_KCAN_CMD_SRQ BIT(0)
 
+/* Control CAN LED, active low */
+#define KVASER_PCIEFD_KCAN_IOC_LED BIT(0)
+
 /* Transmitter unaligned */
 #define KVASER_PCIEFD_KCAN_IRQ_TAL BIT(17)
 /* Tx FIFO empty */

@@ -410,6 +414,7 @@ struct kvaser_pciefd_can {
 	struct kvaser_pciefd *kv_pcie;
 	void __iomem *reg_base;
 	struct can_berr_counter bec;
+	u32 ioc;
 	u8 cmd_seq;
 	u8 tx_max_count;
 	u8 tx_idx;

@@ -528,6 +533,16 @@ static inline void kvaser_pciefd_abort_flush_reset(struct kvaser_pciefd_can *can
 	kvaser_pciefd_send_kcan_cmd(can, KVASER_PCIEFD_KCAN_CMD_AT);
 }
 
+static inline void kvaser_pciefd_set_led(struct kvaser_pciefd_can *can, bool on)
+{
+	if (on)
+		can->ioc &= ~KVASER_PCIEFD_KCAN_IOC_LED;
+	else
+		can->ioc |= KVASER_PCIEFD_KCAN_IOC_LED;
+
+	iowrite32(can->ioc, can->reg_base + KVASER_PCIEFD_KCAN_IOC_REG);
+}
+
 static void kvaser_pciefd_enable_err_gen(struct kvaser_pciefd_can *can)
 {
 	u32 mode;

@@ -990,6 +1005,9 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
 		/* Disable Bus load reporting */
 		iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_BUS_LOAD_REG);
 
+		can->ioc = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_IOC_REG);
+		kvaser_pciefd_set_led(can, false);
+
 		tx_nr_packets_max =
 			FIELD_GET(KVASER_PCIEFD_KCAN_TX_NR_PACKETS_MAX_MASK,
 				  ioread32(can->reg_base + KVASER_PCIEFD_KCAN_TX_NR_PACKETS_REG));

index c8f530ef416e..ed1ea8a9a6d2 100644
@@ -968,8 +968,32 @@ static const struct net_device_ops kvaser_pciefd_netdev_ops = {
 	.ndo_change_mtu = can_change_mtu,
 };
 
+static int kvaser_pciefd_set_phys_id(struct net_device *netdev,
+				     enum ethtool_phys_id_state state)
+{
+	struct kvaser_pciefd_can *can = netdev_priv(netdev);
+
+	switch (state) {
+	case ETHTOOL_ID_ACTIVE:
+		return 3; /* 3 On/Off cycles per second */
+
+	case ETHTOOL_ID_ON:
+		kvaser_pciefd_set_led(can, true);
+		return 0;
+
+	case ETHTOOL_ID_OFF:
+	case ETHTOOL_ID_INACTIVE:
+		kvaser_pciefd_set_led(can, false);
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
 static const struct ethtool_ops kvaser_pciefd_ethtool_ops = {
 	.get_ts_info = can_ethtool_op_get_ts_info_hwts,
+	.set_phys_id = kvaser_pciefd_set_phys_id,
 };
 
 static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)

index ed1ea8a9a6d2..4bdb1132ecf9 100644
@@ -1813,10 +1813,11 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 			       const struct pci_device_id *id)
 {
 	int ret;
+	struct device *dev = &pdev->dev;
 	struct kvaser_pciefd *pcie;
 	const struct kvaser_pciefd_irq_mask *irq_mask;
 
-	pcie = devm_kzalloc(&pdev->dev, sizeof(*pcie), GFP_KERNEL);
+	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
 	if (!pcie)
 		return -ENOMEM;
 

@@ -1855,7 +1856,7 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 
 	ret = pci_alloc_irq_vectors(pcie->pci, 1, 1, PCI_IRQ_INTX | PCI_IRQ_MSI);
 	if (ret < 0) {
-		dev_err(&pcie->pci->dev, "Failed to allocate IRQ vectors.\n");
+		dev_err(dev, "Failed to allocate IRQ vectors.\n");
 		goto err_teardown_can_ctrls;
 	}
 

@@ -1868,7 +1869,7 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	ret = request_irq(pcie->pci->irq, kvaser_pciefd_irq_handler,
 			  IRQF_SHARED, KVASER_PCIEFD_DRV_NAME, pcie);
 	if (ret) {
-		dev_err(&pcie->pci->dev, "Failed to request IRQ %d\n", pcie->pci->irq);
+		dev_err(dev, "Failed to request IRQ %d\n", pcie->pci->irq);
 		goto err_pci_free_irq_vectors;
 	}
 	iowrite32(KVASER_PCIEFD_SRB_IRQ_DPD0 | KVASER_PCIEFD_SRB_IRQ_DPD1,

index 4bdb1132ecf9..7153b9ea0d3d 100644
@@ -325,6 +325,12 @@ struct kvaser_pciefd_driver_data {
 	const struct kvaser_pciefd_dev_ops *ops;
 };
 
+struct kvaser_pciefd_fw_version {
+	u8 major;
+	u8 minor;
+	u16 build;
+};
+
 static const struct kvaser_pciefd_address_offset kvaser_pciefd_altera_address_offset = {
 	.serdes = 0x1000,
 	.pci_ien = 0x50,

@@ -437,6 +443,7 @@ struct kvaser_pciefd {
 	u32 bus_freq;
 	u32 freq;
 	u32 freq_to_ticks_div;
+	struct kvaser_pciefd_fw_version fw_version;
 };
 
 struct kvaser_pciefd_rx_packet {

@@ -1205,14 +1212,12 @@ static int kvaser_pciefd_setup_board(struct kvaser_pciefd *pcie)
 	u32 version, srb_status, build;
 
 	version = ioread32(KVASER_PCIEFD_SYSID_ADDR(pcie) + KVASER_PCIEFD_SYSID_VERSION_REG);
+	build = ioread32(KVASER_PCIEFD_SYSID_ADDR(pcie) + KVASER_PCIEFD_SYSID_BUILD_REG);
 	pcie->nr_channels = min(KVASER_PCIEFD_MAX_CAN_CHANNELS,
 				FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_NR_CHAN_MASK, version));
-
-	build = ioread32(KVASER_PCIEFD_SYSID_ADDR(pcie) + KVASER_PCIEFD_SYSID_BUILD_REG);
-	dev_dbg(&pcie->pci->dev, "Version %lu.%lu.%lu\n",
-		FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_MAJOR_MASK, version),
-		FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_MINOR_MASK, version),
-		FIELD_GET(KVASER_PCIEFD_SYSID_BUILD_SEQ_MASK, build));
+	pcie->fw_version.major = FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_MAJOR_MASK, version);
+	pcie->fw_version.minor = FIELD_GET(KVASER_PCIEFD_SYSID_VERSION_MINOR_MASK, version);
+	pcie->fw_version.build = FIELD_GET(KVASER_PCIEFD_SYSID_BUILD_SEQ_MASK, build);
 
 	srb_status = ioread32(KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_STAT_REG);
 	if (!(srb_status & KVASER_PCIEFD_SRB_STAT_DMA)) {

index 7153b9ea0d3d..8dcb1d1c67e4 100644
@@ -1028,6 +1028,7 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
 		can->completed_tx_bytes = 0;
 		can->bec.txerr = 0;
 		can->bec.rxerr = 0;
+		can->can.dev->dev_port = i;
 
 		init_completion(&can->start_comp);
 		init_completion(&can->flush_comp);

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index 55bb7e078340..34ba393d6093 100644
@@ -13,6 +13,7 @@
 #include <linux/spinlock.h>
 #include <linux/timer.h>
 #include <linux/types.h>
+#include <net/devlink.h>
 
 #define KVASER_PCIEFD_MAX_CAN_CHANNELS 8UL
 #define KVASER_PCIEFD_DMA_COUNT 2U

@@ -87,4 +88,5 @@ struct kvaser_pciefd {
 	struct kvaser_pciefd_fw_version fw_version;
 };
 
+extern const struct devlink_ops kvaser_pciefd_devlink_ops;
 #endif /* _KVASER_PCIEFD_H */

index 97cbe07c4ee3..60c72ab0a5d8 100644
@@ -1751,14 +1751,16 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 			       const struct pci_device_id *id)
 {
 	int ret;
+	struct devlink *devlink;
 	struct device *dev = &pdev->dev;
 	struct kvaser_pciefd *pcie;
 	const struct kvaser_pciefd_irq_mask *irq_mask;
 
-	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
-	if (!pcie)
+	devlink = devlink_alloc(&kvaser_pciefd_devlink_ops, sizeof(*pcie), dev);
+	if (!devlink)
 		return -ENOMEM;
 
+	pcie = devlink_priv(devlink);
 	pci_set_drvdata(pdev, pcie);
 	pcie->pci = pdev;
 	pcie->driver_data = (const struct kvaser_pciefd_driver_data *)id->driver_data;

@@ -1766,7 +1768,7 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 
 	ret = pci_enable_device(pdev);
 	if (ret)
-		return ret;
+		goto err_free_devlink;
 
 	ret = pci_request_regions(pdev, KVASER_PCIEFD_DRV_NAME);
 	if (ret)

@@ -1830,6 +1832,8 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	if (ret)
 		goto err_free_irq;
 
+	devlink_register(devlink);
+
 	return 0;
 
 err_free_irq:

@@ -1853,6 +1857,9 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 err_disable_pci:
 	pci_disable_device(pdev);
 
+err_free_devlink:
+	devlink_free(devlink);
+
 	return ret;
 }
 

@@ -1876,6 +1883,8 @@ static void kvaser_pciefd_remove(struct pci_dev *pdev)
 	for (i = 0; i < pcie->nr_channels; ++i)
 		free_candev(pcie->can[i]->can.dev);
 
+	devlink_unregister(priv_to_devlink(pcie));
+	devlink_free(priv_to_devlink(pcie));
 	pci_iounmap(pdev, pcie->reg_base);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);

new file mode 100644
index 000000000000..7c2040ed53d7
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+/* kvaser_pciefd devlink functions
+ *
+ * Copyright (C) 2025 KVASER AB, Sweden. All rights reserved.
+ */
+#include "kvaser_pciefd.h"
+
+#include <net/devlink.h>
+
+const struct devlink_ops kvaser_pciefd_devlink_ops = {
+};

index 7c2040ed53d7..1fbb40dbbb7a 100644
@@ -7,5 +7,29 @@
 
 #include <net/devlink.h>
 
+static int kvaser_pciefd_devlink_info_get(struct devlink *devlink,
+					  struct devlink_info_req *req,
+					  struct netlink_ext_ack *extack)
+{
+	struct kvaser_pciefd *pcie = devlink_priv(devlink);
+	char buf[] = "xxx.xxx.xxxxx";
+	int ret;
+
+	if (pcie->fw_version.major) {
+		snprintf(buf, sizeof(buf), "%u.%u.%u",
+			 pcie->fw_version.major,
+			 pcie->fw_version.minor,
+			 pcie->fw_version.build);
+		ret = devlink_info_version_running_put(req,
+						       DEVLINK_INFO_VERSION_GENERIC_FW,
+						       buf);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
 const struct devlink_ops kvaser_pciefd_devlink_ops = {
+	.info_get = kvaser_pciefd_devlink_info_get,
 };

index 34ba393d6093..08c9ddc1ee85 100644
@@ -59,6 +59,7 @@ struct kvaser_pciefd_fw_version {
 
 struct kvaser_pciefd_can {
 	struct can_priv can;
+	struct devlink_port devlink_port;
 	struct kvaser_pciefd *kv_pcie;
 	void __iomem *reg_base;
 	struct can_berr_counter bec;

@@ -89,4 +90,7 @@ struct kvaser_pciefd {
 };
 
 extern const struct devlink_ops kvaser_pciefd_devlink_ops;
+
+int kvaser_pciefd_devlink_port_register(struct kvaser_pciefd_can *can);
+void kvaser_pciefd_devlink_port_unregister(struct kvaser_pciefd_can *can);
 #endif /* _KVASER_PCIEFD_H */

index 60c72ab0a5d8..86584ce7bbfa 100644
@@ -943,6 +943,7 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
 		struct net_device *netdev;
 		struct kvaser_pciefd_can *can;
 		u32 status, tx_nr_packets_max;
+		int ret;
 
 		netdev = alloc_candev(sizeof(struct kvaser_pciefd_can),
 				      roundup_pow_of_two(KVASER_PCIEFD_CAN_TX_MAX_COUNT));

@@ -1013,6 +1014,11 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
 
 		pcie->can[i] = can;
 		kvaser_pciefd_pwm_start(can);
+		ret = kvaser_pciefd_devlink_port_register(can);
+		if (ret) {
+			dev_err(&pcie->pci->dev, "Failed to register devlink port\n");
+			return ret;
+		}
 	}
 
 	return 0;

@@ -1732,6 +1738,7 @@ static void kvaser_pciefd_teardown_can_ctrls(struct kvaser_pciefd *pcie)
 		if (can) {
 			iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 			kvaser_pciefd_pwm_stop(can);
+			kvaser_pciefd_devlink_port_unregister(can);
 			free_candev(can->can.dev);
 		}
 	}

@@ -1874,6 +1881,7 @@ static void kvaser_pciefd_remove(struct pci_dev *pdev)
 		unregister_candev(can->can.dev);
 		timer_delete(&can->bec_poll_timer);
 		kvaser_pciefd_pwm_stop(can);
+		kvaser_pciefd_devlink_port_unregister(can);
 	}
 
 	kvaser_pciefd_disable_irq_srcs(pcie);

index 1fbb40dbbb7a..1d61a8b0eeba 100644
@@ -5,6 +5,7 @@
  */
 #include "kvaser_pciefd.h"
 
+#include <linux/netdevice.h>
 #include <net/devlink.h>
 
 static int kvaser_pciefd_devlink_info_get(struct devlink *devlink,

@@ -33,3 +34,27 @@ static int kvaser_pciefd_devlink_info_get(struct devlink *devlink,
 const struct devlink_ops kvaser_pciefd_devlink_ops = {
 	.info_get = kvaser_pciefd_devlink_info_get,
 };
+
+int kvaser_pciefd_devlink_port_register(struct kvaser_pciefd_can *can)
+{
+	int ret;
+	struct devlink_port_attrs attrs = {
+		.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL,
+		.phys.port_number = can->can.dev->dev_port,
+	};
+	devlink_port_attrs_set(&can->devlink_port, &attrs);
+
+	ret = devlink_port_register(priv_to_devlink(can->kv_pcie),
+				    &can->devlink_port, can->can.dev->dev_port);
+	if (ret)
+		return ret;
+
+	SET_NETDEV_DEVLINK_PORT(can->can.dev, &can->devlink_port);
+
+	return 0;
+}
+
+void kvaser_pciefd_devlink_port_unregister(struct kvaser_pciefd_can *can)
+{
+	devlink_port_unregister(&can->devlink_port);
+}