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Message-ID: <20250618144743.843815-2-vikas.gupta@broadcom.com>
Date: Wed, 18 Jun 2025 14:47:31 +0000
From: Vikas Gupta <vikas.gupta@...adcom.com>
To: davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
andrew+netdev@...n.ch,
horms@...nel.org
Cc: netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
michael.chan@...adcom.com,
pavan.chebbi@...adcom.com,
vsrama-krishna.nemani@...adcom.com,
Vikas Gupta <vikas.gupta@...adcom.com>,
Bhargava Chenna Marreddy <bhargava.marreddy@...adcom.com>,
Rajashekar Hudumula <rajashekar.hudumula@...adcom.com>
Subject: [net-next, 01/10] bng_en: Add PCI interface
Add basic pci interface to the driver which supports
the BCM5770X NIC family.
Signed-off-by: Vikas Gupta <vikas.gupta@...adcom.com>
Reviewed-by: Bhargava Chenna Marreddy <bhargava.marreddy@...adcom.com>
Reviewed-by: Rajashekar Hudumula <rajashekar.hudumula@...adcom.com>
---
MAINTAINERS | 6 +
drivers/net/ethernet/broadcom/Kconfig | 8 +
drivers/net/ethernet/broadcom/Makefile | 1 +
drivers/net/ethernet/broadcom/bnge/Makefile | 5 +
drivers/net/ethernet/broadcom/bnge/bnge.h | 16 ++
.../net/ethernet/broadcom/bnge/bnge_core.c | 149 ++++++++++++++++++
6 files changed, 185 insertions(+)
create mode 100644 drivers/net/ethernet/broadcom/bnge/Makefile
create mode 100644 drivers/net/ethernet/broadcom/bnge/bnge.h
create mode 100644 drivers/net/ethernet/broadcom/bnge/bnge_core.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 507c5ff6f620..af349b77a92e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4854,6 +4854,12 @@ F: drivers/firmware/broadcom/tee_bnxt_fw.c
F: drivers/net/ethernet/broadcom/bnxt/
F: include/linux/firmware/broadcom/tee_bnxt_fw.h
+BROADCOM BNG_EN 800 GIGABIT ETHERNET DRIVER
+M: Vikas Gupta <vikas.gupta@...adcom.com>
+L: netdev@...r.kernel.org
+S: Maintained
+F: drivers/net/ethernet/broadcom/bnge/
+
BROADCOM BRCM80211 IEEE802.11 WIRELESS DRIVERS
M: Arend van Spriel <arend.vanspriel@...adcom.com>
L: linux-wireless@...r.kernel.org
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig
index 81a74e07464f..e2c1ac91708e 100644
--- a/drivers/net/ethernet/broadcom/Kconfig
+++ b/drivers/net/ethernet/broadcom/Kconfig
@@ -253,6 +253,14 @@ config BNXT_HWMON
Say Y if you want to expose the thermal sensor data on NetXtreme-C/E
devices, via the hwmon sysfs interface.
+config BNGE
+ tristate "Broadcom Ethernet device support"
+ depends on PCI
+ help
+ This driver supports Broadcom 50/100/200/400/800 gigabit Ethernet cards.
+ The module will be called bng_en. To compile this driver as a module,
+ choose M here.
+
config BCMASP
tristate "Broadcom ASP 2.0 Ethernet support"
depends on ARCH_BRCMSTB || COMPILE_TEST
diff --git a/drivers/net/ethernet/broadcom/Makefile b/drivers/net/ethernet/broadcom/Makefile
index bac5cb6ad0cd..10cc1c92ecfc 100644
--- a/drivers/net/ethernet/broadcom/Makefile
+++ b/drivers/net/ethernet/broadcom/Makefile
@@ -18,3 +18,4 @@ obj-$(CONFIG_BGMAC_PLATFORM) += bgmac-platform.o
obj-$(CONFIG_SYSTEMPORT) += bcmsysport.o
obj-$(CONFIG_BNXT) += bnxt/
obj-$(CONFIG_BCMASP) += asp2/
+obj-$(CONFIG_BNGE) += bnge/
diff --git a/drivers/net/ethernet/broadcom/bnge/Makefile b/drivers/net/ethernet/broadcom/bnge/Makefile
new file mode 100644
index 000000000000..0c3d632805d1
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bnge/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_BNGE) += bng_en.o
+
+bng_en-y := bnge_core.o
diff --git a/drivers/net/ethernet/broadcom/bnge/bnge.h b/drivers/net/ethernet/broadcom/bnge/bnge.h
new file mode 100644
index 000000000000..b49c51b44473
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bnge/bnge.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2025 Broadcom */
+
+#ifndef _BNGE_H_
+#define _BNGE_H_
+
+#define DRV_NAME "bng_en"
+#define DRV_SUMMARY "Broadcom 800G Ethernet Linux Driver"
+
+extern char bnge_driver_name[];
+
+enum board_idx {
+ BCM57708,
+};
+
+#endif /* _BNGE_H_ */
diff --git a/drivers/net/ethernet/broadcom/bnge/bnge_core.c b/drivers/net/ethernet/broadcom/bnge/bnge_core.c
new file mode 100644
index 000000000000..3778210da98d
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bnge/bnge_core.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2025 Broadcom.
+
+#include <linux/init.h>
+#include <linux/crash_dump.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "bnge.h"
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRV_SUMMARY);
+
+char bnge_driver_name[] = DRV_NAME;
+
+static const struct {
+ char *name;
+} board_info[] = {
+ [BCM57708] = { "Broadcom BCM57708 50Gb/100Gb/200Gb/400Gb/800Gb Ethernet" },
+};
+
+static const struct pci_device_id bnge_pci_tbl[] = {
+ { PCI_VDEVICE(BROADCOM, 0x1780), .driver_data = BCM57708 },
+ /* Required last entry */
+ {0, }
+};
+MODULE_DEVICE_TABLE(pci, bnge_pci_tbl);
+
+static void bnge_print_device_info(struct pci_dev *pdev, enum board_idx idx)
+{
+ struct device *dev = &pdev->dev;
+
+ dev_info(dev, "%s found at mem %lx\n", board_info[idx].name,
+ (long)pci_resource_start(pdev, 0));
+
+ pcie_print_link_status(pdev);
+}
+
+static void bnge_pci_disable(struct pci_dev *pdev)
+{
+ pci_release_regions(pdev);
+ if (pci_is_enabled(pdev))
+ pci_disable_device(pdev);
+}
+
+static int bnge_pci_enable(struct pci_dev *pdev)
+{
+ int rc;
+
+ rc = pci_enable_device(pdev);
+ if (rc) {
+ dev_err(&pdev->dev, "Cannot enable PCI device, aborting\n");
+ return rc;
+ }
+
+ if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+ dev_err(&pdev->dev,
+ "Cannot find PCI device base address, aborting\n");
+ rc = -ENODEV;
+ goto err_pci_disable;
+ }
+
+ rc = pci_request_regions(pdev, bnge_driver_name);
+ if (rc) {
+ dev_err(&pdev->dev, "Cannot obtain PCI resources, aborting\n");
+ goto err_pci_disable;
+ }
+
+ if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) != 0 &&
+ dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)) != 0) {
+ dev_err(&pdev->dev, "System does not support DMA, aborting\n");
+ rc = -EIO;
+ goto err_pci_release;
+ }
+
+ pci_set_master(pdev);
+
+ return 0;
+
+err_pci_release:
+ pci_release_regions(pdev);
+
+err_pci_disable:
+ pci_disable_device(pdev);
+ return rc;
+}
+
+static int bnge_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ int rc;
+
+ if (pci_is_bridge(pdev))
+ return -ENODEV;
+
+ if (!pdev->msix_cap) {
+ dev_err(&pdev->dev, "MSIX capability missing, aborting\n");
+ return -ENODEV;
+ }
+
+ if (is_kdump_kernel()) {
+ pci_clear_master(pdev);
+ pcie_flr(pdev);
+ }
+
+ rc = bnge_pci_enable(pdev);
+ if (rc)
+ return rc;
+
+ bnge_print_device_info(pdev, ent->driver_data);
+
+ pci_save_state(pdev);
+
+ return 0;
+}
+
+static void bnge_remove_one(struct pci_dev *pdev)
+{
+ bnge_pci_disable(pdev);
+}
+
+static void bnge_shutdown(struct pci_dev *pdev)
+{
+ pci_disable_device(pdev);
+
+ if (system_state == SYSTEM_POWER_OFF) {
+ pci_wake_from_d3(pdev, 0);
+ pci_set_power_state(pdev, PCI_D3hot);
+ }
+}
+
+static struct pci_driver bnge_driver = {
+ .name = bnge_driver_name,
+ .id_table = bnge_pci_tbl,
+ .probe = bnge_probe_one,
+ .remove = bnge_remove_one,
+ .shutdown = bnge_shutdown,
+};
+
+static int __init bnge_init_module(void)
+{
+ return pci_register_driver(&bnge_driver);
+}
+module_init(bnge_init_module);
+
+static void __exit bnge_exit_module(void)
+{
+ pci_unregister_driver(&bnge_driver);
+}
+module_exit(bnge_exit_module);
--
2.47.1
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