net: ngbe: Add build support for ngbe

Add build options and guidance doc.
Initialize pci device access for Wangxun Gigabit Ethernet devices.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Link: https://lore.kernel.org/r/20220826034609.51854-1-mengyuanlou@net-swift.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

6 files changed, 267 insertions, 0 deletions

diff --git a/drivers/net/ethernet/wangxun/Kconfig b/drivers/net/ethernet/wangxun/Kconfig
index b4a4fa0a58f8..f5d43d8c9629 100644
--- a/drivers/net/ethernet/wangxun/Kconfig
+++ b/drivers/net/ethernet/wangxun/Kconfig
@@ -16,6 +16,19 @@ config NET_VENDOR_WANGXUN
 
 if NET_VENDOR_WANGXUN
 
+config NGBE
+	tristate "Wangxun(R) GbE PCI Express adapters support"
+	depends on PCI
+	help
+	  This driver supports Wangxun(R) GbE PCI Express family of
+	  adapters.
+
+	  More specific information on configuring the driver is in
+	  <file:Documentation/networking/device_drivers/ethernet/wangxun/ngbe.rst>.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called ngbe.
+
 config TXGBE
 	tristate "Wangxun(R) 10GbE PCI Express adapters support"
 	depends on PCI
diff --git a/drivers/net/ethernet/wangxun/Makefile b/drivers/net/ethernet/wangxun/Makefile
index c34db1bead25..ac3fb06b233c 100644
--- a/drivers/net/ethernet/wangxun/Makefile
+++ b/drivers/net/ethernet/wangxun/Makefile
@@ -4,3 +4,4 @@
 #
 
 obj-$(CONFIG_TXGBE) += txgbe/
+obj-$(CONFIG_NGBE) += ngbe/
diff --git a/drivers/net/ethernet/wangxun/ngbe/Makefile b/drivers/net/ethernet/wangxun/ngbe/Makefile
new file mode 100644
index 000000000000..0baf75907496
--- /dev/null
+++ b/drivers/net/ethernet/wangxun/ngbe/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd.
+#
+# Makefile for the Wangxun(R) GbE PCI Express ethernet driver
+#
+
+obj-$(CONFIG_NGBE) += ngbe.o
+
+ngbe-objs := ngbe_main.o
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe.h b/drivers/net/ethernet/wangxun/ngbe/ngbe.h
new file mode 100644
index 000000000000..f5fa6e5238cc
--- /dev/null
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. */
+
+#ifndef _NGBE_H_
+#define _NGBE_H_
+
+#include "ngbe_type.h"
+
+#define NGBE_MAX_FDIR_INDICES		7
+
+#define NGBE_MAX_RX_QUEUES		(NGBE_MAX_FDIR_INDICES + 1)
+#define NGBE_MAX_TX_QUEUES		(NGBE_MAX_FDIR_INDICES + 1)
+
+/* board specific private data structure */
+struct ngbe_adapter {
+	u8 __iomem *io_addr;    /* Mainly for iounmap use */
+	/* OS defined structs */
+	struct net_device *netdev;
+	struct pci_dev *pdev;
+};
+
+extern char ngbe_driver_name[];
+
+#endif /* _NGBE_H_ */
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
new file mode 100644
index 000000000000..7674cb6e5700
--- /dev/null
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_main.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/string.h>
+#include <linux/aer.h>
+#include <linux/etherdevice.h>
+
+#include "ngbe.h"
+char ngbe_driver_name[] = "ngbe";
+
+/* ngbe_pci_tbl - PCI Device ID Table
+ *
+ * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
+ *   Class, Class Mask, private data (not used) }
+ */
+static const struct pci_device_id ngbe_pci_tbl[] = {
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL_W), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A2), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A2S), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A4), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A4S), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL2), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL2S), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL4), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860AL4S), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860LC), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A1), 0},
+	{ PCI_VDEVICE(WANGXUN, NGBE_DEV_ID_EM_WX1860A1L), 0},
+	/* required last entry */
+	{ .device = 0 }
+};
+
+static void ngbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
+{
+	struct ngbe_adapter *adapter = pci_get_drvdata(pdev);
+	struct net_device *netdev = adapter->netdev;
+
+	netif_device_detach(netdev);
+
+	pci_disable_device(pdev);
+}
+
+static void ngbe_shutdown(struct pci_dev *pdev)
+{
+	bool wake;
+
+	ngbe_dev_shutdown(pdev, &wake);
+
+	if (system_state == SYSTEM_POWER_OFF) {
+		pci_wake_from_d3(pdev, wake);
+		pci_set_power_state(pdev, PCI_D3hot);
+	}
+}
+
+/**
+ * ngbe_probe - Device Initialization Routine
+ * @pdev: PCI device information struct
+ * @ent: entry in ngbe_pci_tbl
+ *
+ * Returns 0 on success, negative on failure
+ *
+ * ngbe_probe initializes an adapter identified by a pci_dev structure.
+ * The OS initialization, configuring of the adapter private structure,
+ * and a hardware reset occur.
+ **/
+static int ngbe_probe(struct pci_dev *pdev,
+		      const struct pci_device_id __always_unused *ent)
+{
+	struct ngbe_adapter *adapter = NULL;
+	struct net_device *netdev;
+	int err;
+
+	err = pci_enable_device_mem(pdev);
+	if (err)
+		return err;
+
+	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (err) {
+		dev_err(&pdev->dev,
+			"No usable DMA configuration, aborting\n");
+		goto err_pci_disable_dev;
+	}
+
+	err = pci_request_selected_regions(pdev,
+					   pci_select_bars(pdev, IORESOURCE_MEM),
+					   ngbe_driver_name);
+	if (err) {
+		dev_err(&pdev->dev,
+			"pci_request_selected_regions failed %d\n", err);
+		goto err_pci_disable_dev;
+	}
+
+	pci_enable_pcie_error_reporting(pdev);
+	pci_set_master(pdev);
+
+	netdev = devm_alloc_etherdev_mqs(&pdev->dev,
+					 sizeof(struct ngbe_adapter),
+					 NGBE_MAX_TX_QUEUES,
+					 NGBE_MAX_RX_QUEUES);
+	if (!netdev) {
+		err = -ENOMEM;
+		goto err_pci_release_regions;
+	}
+
+	SET_NETDEV_DEV(netdev, &pdev->dev);
+
+	adapter = netdev_priv(netdev);
+	adapter->netdev = netdev;
+	adapter->pdev = pdev;
+
+	adapter->io_addr = devm_ioremap(&pdev->dev,
+					pci_resource_start(pdev, 0),
+					pci_resource_len(pdev, 0));
+	if (!adapter->io_addr) {
+		err = -EIO;
+		goto err_pci_release_regions;
+	}
+
+	netdev->features |= NETIF_F_HIGHDMA;
+
+	pci_set_drvdata(pdev, adapter);
+
+	return 0;
+
+err_pci_release_regions:
+	pci_disable_pcie_error_reporting(pdev);
+	pci_release_selected_regions(pdev,
+				     pci_select_bars(pdev, IORESOURCE_MEM));
+err_pci_disable_dev:
+	pci_disable_device(pdev);
+	return err;
+}
+
+/**
+ * ngbe_remove - Device Removal Routine
+ * @pdev: PCI device information struct
+ *
+ * ngbe_remove is called by the PCI subsystem to alert the driver
+ * that it should release a PCI device.  The could be caused by a
+ * Hot-Plug event, or because the driver is going to be removed from
+ * memory.
+ **/
+static void ngbe_remove(struct pci_dev *pdev)
+{
+	pci_release_selected_regions(pdev,
+				     pci_select_bars(pdev, IORESOURCE_MEM));
+
+	pci_disable_pcie_error_reporting(pdev);
+
+	pci_disable_device(pdev);
+}
+
+static struct pci_driver ngbe_driver = {
+	.name     = ngbe_driver_name,
+	.id_table = ngbe_pci_tbl,
+	.probe    = ngbe_probe,
+	.remove   = ngbe_remove,
+	.shutdown = ngbe_shutdown,
+};
+
+module_pci_driver(ngbe_driver);
+
+MODULE_DEVICE_TABLE(pci, ngbe_pci_tbl);
+MODULE_AUTHOR("Beijing WangXun Technology Co., Ltd, <software@net-swift.com>");
+MODULE_DESCRIPTION("WangXun(R) Gigabit PCI Express Network Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h b/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h
new file mode 100644
index 000000000000..26e776c3539a
--- /dev/null
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_type.h
@@ -0,0 +1,50 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2019 - 2022 Beijing WangXun Technology Co., Ltd. */
+
+#ifndef _NGBE_TYPE_H_
+#define _NGBE_TYPE_H_
+
+#include <linux/types.h>
+#include <linux/netdevice.h>
+
+/************ NGBE_register.h ************/
+/* Vendor ID */
+#ifndef PCI_VENDOR_ID_WANGXUN
+#define PCI_VENDOR_ID_WANGXUN			0x8088
+#endif
+
+/* Device IDs */
+#define NGBE_DEV_ID_EM_WX1860AL_W		0x0100
+#define NGBE_DEV_ID_EM_WX1860A2			0x0101
+#define NGBE_DEV_ID_EM_WX1860A2S		0x0102
+#define NGBE_DEV_ID_EM_WX1860A4			0x0103
+#define NGBE_DEV_ID_EM_WX1860A4S		0x0104
+#define NGBE_DEV_ID_EM_WX1860AL2		0x0105
+#define NGBE_DEV_ID_EM_WX1860AL2S		0x0106
+#define NGBE_DEV_ID_EM_WX1860AL4		0x0107
+#define NGBE_DEV_ID_EM_WX1860AL4S		0x0108
+#define NGBE_DEV_ID_EM_WX1860LC			0x0109
+#define NGBE_DEV_ID_EM_WX1860A1			0x010a
+#define NGBE_DEV_ID_EM_WX1860A1L		0x010b
+
+/* Subsystem ID */
+#define NGBE_SUBID_M88E1512_SFP			0x0003
+#define NGBE_SUBID_OCP_CARD			0x0040
+#define NGBE_SUBID_LY_M88E1512_SFP		0x0050
+#define NGBE_SUBID_M88E1512_RJ45		0x0051
+#define NGBE_SUBID_M88E1512_MIX			0x0052
+#define NGBE_SUBID_YT8521S_SFP			0x0060
+#define NGBE_SUBID_INTERNAL_YT8521S_SFP		0x0061
+#define NGBE_SUBID_YT8521S_SFP_GPIO		0x0062
+#define NGBE_SUBID_INTERNAL_YT8521S_SFP_GPIO	0x0064
+#define NGBE_SUBID_LY_YT8521S_SFP		0x0070
+#define NGBE_SUBID_RGMII_FPGA			0x0080
+
+#define NGBE_OEM_MASK				0x00FF
+
+#define NGBE_NCSI_SUP				0x8000
+#define NGBE_NCSI_MASK				0x8000
+#define NGBE_WOL_SUP				0x4000
+#define NGBE_WOL_MASK				0x4000
+
+#endif /* _NGBE_TYPE_H_ */