[PATCH v4 net-next 01/11] net/nebula-matrix: add minimum nbl build framework

["illusion.wang" <illusion.wang@nebula-matrix.com>]

1.Add nbl min build infrastructure for nbl driver.

2.Implemented the framework of pci device initialization.

Signed-off-by: illusion.wang <illusion.wang@nebula-matrix.com>
---
 .../device_drivers/ethernet/index.rst         |   1 +
 .../ethernet/nebula-matrix/m18100.rst         |  47 ++++++++
 MAINTAINERS                                   |  10 ++
 drivers/net/ethernet/Kconfig                  |   1 +
 drivers/net/ethernet/Makefile                 |   1 +
 drivers/net/ethernet/nebula-matrix/Kconfig    |  36 ++++++
 drivers/net/ethernet/nebula-matrix/Makefile   |   6 +
 .../net/ethernet/nebula-matrix/nbl/Makefile   |  11 ++
 .../net/ethernet/nebula-matrix/nbl/nbl_core.h |  27 +++++
 .../nbl/nbl_include/nbl_include.h             |  23 ++++
 .../net/ethernet/nebula-matrix/nbl/nbl_main.c | 109 ++++++++++++++++++
 11 files changed, 272 insertions(+)
 create mode 100644 Documentation/networking/device_drivers/ethernet/nebula-matrix/m18100.rst
 create mode 100644 drivers/net/ethernet/nebula-matrix/Kconfig
 create mode 100644 drivers/net/ethernet/nebula-matrix/Makefile
 create mode 100644 drivers/net/ethernet/nebula-matrix/nbl/Makefile
 create mode 100644 drivers/net/ethernet/nebula-matrix/nbl/nbl_core.h
 create mode 100644 drivers/net/ethernet/nebula-matrix/nbl/nbl_include/nbl_include.h
 create mode 100644 drivers/net/ethernet/nebula-matrix/nbl/nbl_main.c

diff --git a/Documentation/networking/device_drivers/ethernet/index.rst b/Documentation/networking/device_drivers/ethernet/index.rst
index 5e8fc3d6d741..8b049cb0f3bd 100644
--- a/Documentation/networking/device_drivers/ethernet/index.rst
+++ b/Documentation/networking/device_drivers/ethernet/index.rst
@@ -48,6 +48,7 @@ Contents:
    meta/fbnic
    microsoft/netvsc
    mucse/rnpgbe
+   nebula-matrix/nbl
    netronome/nfp
    pensando/ionic
    pensando/ionic_rdma
diff --git a/Documentation/networking/device_drivers/ethernet/nebula-matrix/m18100.rst b/Documentation/networking/device_drivers/ethernet/nebula-matrix/m18100.rst
new file mode 100644
index 000000000000..c763042ce3ee
--- /dev/null
+++ b/Documentation/networking/device_drivers/ethernet/nebula-matrix/m18100.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+============================================================
+Linux Base Driver for Nebula-matrix M18100-NIC family
+============================================================
+
+Overview:
+=========
+M18100-NIC is a series of network interface card for the Data Center Area.
+
+The driver supports link-speed 100GbE/25GE/10GE.
+
+M18100-NIC devices support MSI-X interrupt vector for each Tx/Rx queue and
+interrupt moderation.
+
+M18100-NIC devices support also various offload features such as checksum offload,
+Receive-Side Scaling(RSS).
+
+Supported PCI vendor ID/device IDs:
+===================================
+
+1f0f:3403 - M18110 Family PF
+1f0f:3404 - M18110 Lx Family PF
+1f0f:3405 - M18110 Family BASE-T PF
+1f0f:3406 - M18110 Lx Family BASE-T PF
+1f0f:3407 - M18110 Family OCP PF
+1f0f:3408 - M18110 Lx Family OCP PF
+1f0f:3409 - M18110 Family BASE-T OCP PF
+1f0f:340a - M18110 Lx Family BASE-T OCP PF
+1f0f:340b - M18100 Family PF
+1f0f:340c - M18100 Lx Family PF
+1f0f:340d - M18100 Family BASE-T PF
+1f0f:340e - M18100 Lx Family BASE-T PF
+1f0f:340f - M18100 Family OCP PF
+1f0f:3410 - M18100 Lx Family OCP PF
+1f0f:3411 - M18100 Family BASE-T OCP PF
+1f0f:3412 - M18100 Lx Family BASE-T OCP PF
+
+Support
+=======
+
+For more information about M18100-NIC, please visit the following URL:
+https://www.nebula-matrix.com/
+
+If an issue is identified with the released source code on the supported kernel
+with a supported adapter, email the specific information related to the issue to
+open@nebula-matrix.com.
diff --git a/MAINTAINERS b/MAINTAINERS
index 98b07da905b0..2c85f70023a9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18015,6 +18015,16 @@ F:	Documentation/devicetree/bindings/hwmon/nuvoton,nct7363.yaml
 F:	Documentation/hwmon/nct7363.rst
 F:	drivers/hwmon/nct7363.c
 
+NEBULA-MATRIX ETHERNET DRIVER (nebula-matrix)
+M:	llusion.Wang <illusion.wang@nebula-matrix.com>
+M:	Dimon.Zhao <dimon.zhao@nebula-matrix.com>
+M:	Alvin.Wang <alvin.wang@nebula-matrix.com>
+M:	Sam Chen <sam.chen@nebula-matrix.com>
+L:	netdev@vger.kernel.org
+S:	Maintained
+F:	Documentation/networking/device_drivers/ethernet/nebula-matrix/*
+F:	drivers/net/ethernet/nebula-matrix/
+
 NETCONSOLE
 M:	Breno Leitao <leitao@debian.org>
 S:	Maintained
diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index aa7103e7f47f..3aa005adb90e 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -131,6 +131,7 @@ config FEALNX
 
 source "drivers/net/ethernet/ni/Kconfig"
 source "drivers/net/ethernet/natsemi/Kconfig"
+source "drivers/net/ethernet/nebula-matrix/Kconfig"
 source "drivers/net/ethernet/netronome/Kconfig"
 source "drivers/net/ethernet/8390/Kconfig"
 source "drivers/net/ethernet/nvidia/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index 6615a67a63d5..024a8e91abed 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_NET_VENDOR_MUCSE) += mucse/
 obj-$(CONFIG_NET_VENDOR_MYRI) += myricom/
 obj-$(CONFIG_FEALNX) += fealnx.o
 obj-$(CONFIG_NET_VENDOR_NATSEMI) += natsemi/
+obj-$(CONFIG_NET_VENDOR_NEBULA_MATRIX) += nebula-matrix/
 obj-$(CONFIG_NET_VENDOR_NETRONOME) += netronome/
 obj-$(CONFIG_NET_VENDOR_NI) += ni/
 obj-$(CONFIG_NET_VENDOR_NVIDIA) += nvidia/
diff --git a/drivers/net/ethernet/nebula-matrix/Kconfig b/drivers/net/ethernet/nebula-matrix/Kconfig
new file mode 100644
index 000000000000..9c65803f5447
--- /dev/null
+++ b/drivers/net/ethernet/nebula-matrix/Kconfig
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Nebula-matrix network device configuration
+#
+
+config NET_VENDOR_NEBULA_MATRIX
+	bool "Nebula-matrix devices"
+	default y
+	help
+	  If you have a network (Ethernet) card belonging to this class, say Y.
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Nebula-matrix cards. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_NEBULA_MATRIX
+
+config NBL_CORE
+	tristate "Nebula-matrix Ethernet Controller m18100 Family support"
+	depends on 64BIT && PCI
+	default m
+	select PAGE_POOL
+	help
+	  This driver supports Nebula-matrix Ethernet Controller m18100 Family of
+	  devices.  For more information about this product, go to the product
+	  description with smart NIC:
+
+	  <http://www.nebula-matrix.com>
+
+	  More specific information on configuring the driver is in
+	  <file:Documentation/networking/device_drivers/ethernet/nebula-matrix/m18100.rst>.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called nbl_core.
+
+endif # NET_VENDOR_NEBULA_MATRIX
diff --git a/drivers/net/ethernet/nebula-matrix/Makefile b/drivers/net/ethernet/nebula-matrix/Makefile
new file mode 100644
index 000000000000..dc6bf7dcd6bf
--- /dev/null
+++ b/drivers/net/ethernet/nebula-matrix/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Nebula-matrix network device drivers.
+#
+
+obj-$(CONFIG_NBL_CORE) += nbl/
diff --git a/drivers/net/ethernet/nebula-matrix/nbl/Makefile b/drivers/net/ethernet/nebula-matrix/nbl/Makefile
new file mode 100644
index 000000000000..df16a3436a5c
--- /dev/null
+++ b/drivers/net/ethernet/nebula-matrix/nbl/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2025 Nebula Matrix Limited.
+# Author:
+
+obj-$(CONFIG_NBL_CORE) := nbl_core.o
+
+nbl_core-objs +=      nbl_main.o
+
+# Provide include files
+ccflags-y += -I$(srctree)/drivers/net/ethernet/nebula-matrix/nbl/nbl_include/
+ccflags-y += -I$(srctree)/drivers/net/ethernet/nebula-matrix/nbl/
diff --git a/drivers/net/ethernet/nebula-matrix/nbl/nbl_core.h b/drivers/net/ethernet/nebula-matrix/nbl/nbl_core.h
new file mode 100644
index 000000000000..51aa4d87146f
--- /dev/null
+++ b/drivers/net/ethernet/nebula-matrix/nbl/nbl_core.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0*/
+/*
+ * Copyright (c) 2025 Nebula Matrix Limited.
+ * Author:
+ */
+
+#ifndef _NBL_CORE_H_
+#define _NBL_CORE_H_
+
+#include <linux/pci.h>
+#include "nbl_include.h"
+#define NBL_CAP_TEST_BIT(val, loc) (((val) >> (loc)) & 0x1)
+
+#define NBL_CAP_IS_CTRL(val) NBL_CAP_TEST_BIT(val, NBL_CAP_HAS_CTRL_BIT)
+#define NBL_CAP_IS_NET(val) NBL_CAP_TEST_BIT(val, NBL_CAP_HAS_NET_BIT)
+#define NBL_CAP_IS_NIC(val) NBL_CAP_TEST_BIT(val, NBL_CAP_IS_NIC_BIT)
+#define NBL_CAP_IS_OCP(val) NBL_CAP_TEST_BIT(val, NBL_CAP_IS_OCP_BIT)
+#define NBL_CAP_IS_LEONIS(val) NBL_CAP_TEST_BIT(val, NBL_CAP_IS_LEONIS_BIT)
+
+enum {
+	NBL_CAP_HAS_CTRL_BIT = 0,
+	NBL_CAP_HAS_NET_BIT,
+	NBL_CAP_IS_NIC_BIT,
+	NBL_CAP_IS_LEONIS_BIT,
+	NBL_CAP_IS_OCP_BIT,
+};
+#endif
diff --git a/drivers/net/ethernet/nebula-matrix/nbl/nbl_include/nbl_include.h b/drivers/net/ethernet/nebula-matrix/nbl/nbl_include/nbl_include.h
new file mode 100644
index 000000000000..f12bf019dfee
--- /dev/null
+++ b/drivers/net/ethernet/nebula-matrix/nbl/nbl_include/nbl_include.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0*/
+/*
+ * Copyright (c) 2025 Nebula Matrix Limited.
+ * Author:
+ */
+
+#ifndef _NBL_INCLUDE_H_
+#define _NBL_INCLUDE_H_
+
+#include <linux/types.h>
+
+/*  ------  Basic definitions  -------  */
+#define NBL_DRIVER_NAME					"nbl_core"
+
+struct nbl_func_caps {
+	u32 has_ctrl:1;
+	u32 has_net:1;
+	u32 is_nic:1;
+	u32 is_ocp:1;
+	u32 rsv:28;
+};
+
+#endif
diff --git a/drivers/net/ethernet/nebula-matrix/nbl/nbl_main.c b/drivers/net/ethernet/nebula-matrix/nbl/nbl_main.c
new file mode 100644
index 000000000000..63bba8211654
--- /dev/null
+++ b/drivers/net/ethernet/nebula-matrix/nbl/nbl_main.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2025 Nebula Matrix Limited.
+ * Author:
+ */
+
+#include <linux/aer.h>
+#include "nbl_core.h"
+
+static int nbl_probe(struct pci_dev *pdev,
+		     const struct pci_device_id __always_unused *id)
+{
+	return 0;
+}
+
+static void nbl_remove(struct pci_dev *pdev)
+{
+}
+
+#define NBL_VENDOR_ID			(0x1F0F)
+
+/*
+ *  Leonis DeviceID
+ * 0x3403-0x340d for snic v3r1 product
+ */
+#define NBL_DEVICE_ID_M18110			(0x3403)
+#define NBL_DEVICE_ID_M18110_LX			(0x3404)
+#define NBL_DEVICE_ID_M18110_BASE_T		(0x3405)
+#define NBL_DEVICE_ID_M18110_LX_BASE_T		(0x3406)
+#define NBL_DEVICE_ID_M18110_OCP		(0x3407)
+#define NBL_DEVICE_ID_M18110_LX_OCP		(0x3408)
+#define NBL_DEVICE_ID_M18110_BASE_T_OCP		(0x3409)
+#define NBL_DEVICE_ID_M18110_LX_BASE_T_OCP	(0x340a)
+#define NBL_DEVICE_ID_M18000			(0x340b)
+#define NBL_DEVICE_ID_M18000_LX			(0x340c)
+#define NBL_DEVICE_ID_M18000_BASE_T		(0x340d)
+#define NBL_DEVICE_ID_M18000_LX_BASE_T		(0x340e)
+#define NBL_DEVICE_ID_M18000_OCP		(0x340f)
+#define NBL_DEVICE_ID_M18000_LX_OCP		(0x3410)
+#define NBL_DEVICE_ID_M18000_BASE_T_OCP		(0x3411)
+#define NBL_DEVICE_ID_M18000_LX_BASE_T_OCP	(0x3412)
+
+static const struct pci_device_id nbl_id_table[] = {
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110_LX),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110_BASE_T),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110_LX_BASE_T),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110_LX_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110_BASE_T_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18110_LX_BASE_T_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000_LX),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000_BASE_T),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000_LX_BASE_T),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000_LX_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000_BASE_T_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	{ PCI_DEVICE(NBL_VENDOR_ID, NBL_DEVICE_ID_M18000_LX_BASE_T_OCP),
+	  .driver_data = BIT(NBL_CAP_HAS_NET_BIT) | BIT(NBL_CAP_IS_NIC_BIT) |
+			 BIT(NBL_CAP_IS_LEONIS_BIT) | BIT(NBL_CAP_IS_OCP_BIT) },
+	/* required as sentinel */
+	{
+		0,
+	}
+};
+MODULE_DEVICE_TABLE(pci, nbl_id_table);
+
+static struct pci_driver nbl_driver = {
+	.name = NBL_DRIVER_NAME,
+	.id_table = nbl_id_table,
+	.probe = nbl_probe,
+	.remove = nbl_remove,
+};
+
+module_pci_driver(nbl_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Nebula Matrix Network Driver");
-- 
2.47.3