* [PATCH v1] rtl_pci: add support for Realtek management device
@ 2026-03-03 3:01 javen
2026-03-03 4:45 ` kernel test robot
0 siblings, 1 reply; 2+ messages in thread
From: javen @ 2026-03-03 3:01 UTC (permalink / raw)
To: arnd, gregkh; +Cc: linux-kernel, Javen Xu
From: Javen Xu <javen_xu@realsil.com.cn>
This is not the standard ethernet driver. It specially handles the
management function.
I tried to submitted to linux/net-next before, but they said these class
didn't belong there. So I came here, and I'm wondering if these unknown
classes used for management functions should be submitted here.
Thanks,
Javen Xu
Signed-off-by: Javen Xu <javen_xu@realsil.com.cn>
---
drivers/misc/Kconfig | 12 +++++++
drivers/misc/Makefile | 1 +
drivers/misc/rtl_pci.c | 78 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 91 insertions(+)
create mode 100644 drivers/misc/rtl_pci.c
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 5cc79d1517af..e3c572bd1e34 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -643,6 +643,18 @@ config MCHP_LAN966X_PCI
- lan966x-miim (MDIO_MSCC_MIIM)
- lan966x-switch (LAN966X_SWITCH)
+config RTL_PCI
+ tristate "Realtek Management Interface Support"
+ depends on PCI
+ help
+ This enables support for the Realtek nic PCIe Management device.
+
+ Please note that this is NOT the standard Ethernet driver for network
+ traffic. It specifically handles the management function.
+
+ To compile this driver as a module, choose M here: the module
+ will be called rtl_pci.o.
+
source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index b32a2597d246..b937a25707c8 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -75,3 +75,4 @@ obj-$(CONFIG_MCHP_LAN966X_PCI) += lan966x-pci.o
obj-y += keba/
obj-y += amd-sbi/
obj-$(CONFIG_MISC_RP1) += rp1/
+obj-$(CONFIG_RTL_PCI) += rtl_pci.o
diff --git a/drivers/misc/rtl_pci.c b/drivers/misc/rtl_pci.c
new file mode 100644
index 000000000000..148acb192b33
--- /dev/null
+++ b/drivers/misc/rtl_pci.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This module handles PCI endpoint functions exposed by Realtek
+ * management controllers (e.g. RTL8111x series). It manages device
+ * probing for virtual devices.
+ *
+ * Copyright(c) 2026 Realtek Semiconductor Corp.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#define PCI_DEVICE_ID_REALTEK_PTOU 0x8164
+#define PCI_DEVICE_ID_REALTEK_COM1 0x816a
+#define PCI_DEVICE_ID_REALTEK_COM2 0x816b
+#define PCI_DEVICE_ID_REALTEK_IPMI 0x816c
+#define PCI_DEVICE_ID_REALTEK_BMC 0x816e
+#define PCI_DEVICE_ID_REALTEK_PCIBR 0x9151
+
+static struct pci_device_id rtl_pci_tbl[] = {
+ { PCI_VDEVICE(REALTEK, PCI_DEVICE_ID_REALTEK_PTOU), },
+ { PCI_VDEVICE(REALTEK, PCI_DEVICE_ID_REALTEK_COM1), },
+ { PCI_VDEVICE(REALTEK, PCI_DEVICE_ID_REALTEK_COM2), },
+ { PCI_VDEVICE(REALTEK, PCI_DEVICE_ID_REALTEK_IPMI), },
+ { PCI_VDEVICE(REALTEK, PCI_DEVICE_ID_REALTEK_BMC), },
+ { PCI_VDEVICE(REALTEK, PCI_DEVICE_ID_REALTEK_PCIBR), .class_mask = 0xff00 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(pci, rtl_pci_tbl);
+
+static int rtl_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int rc;
+
+ /* enable device (incl. PCI PM wakeup and hotplug setup) */
+ rc = pcim_enable_device(pdev);
+ if (rc < 0)
+ return dev_err_probe(&pdev->dev, rc, "enable failure\n");
+
+ dev_info(&pdev->dev, "enable device\n");
+
+ return rc;
+}
+
+static void rtl_remove(struct pci_dev *pdev) {}
+
+static int rtl_pm_suspend(struct device *device)
+{
+ return 0;
+}
+
+static int rtl_pm_resume(struct device *device)
+{
+ return 0;
+}
+
+static const struct dev_pm_ops rtl_pm_ops = {
+ SYSTEM_SLEEP_PM_OPS(rtl_pm_suspend, rtl_pm_resume)
+};
+
+static struct pci_driver rtl_pci_driver = {
+ .name = "rtl_pci",
+ .id_table = rtl_pci_tbl,
+ .probe = rtl_probe,
+ .remove = rtl_remove,
+#ifdef CONFIG_PM
+ .driver.pm = pm_ptr(&rtl_pm_ops),
+#endif
+};
+
+module_pci_driver(rtl_pci_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("RealTek pci driver");
--
2.43.0
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