Merge branch 'add-support-of-hibmcge-ethernet-driver'

Jijie Shao says:

====================
Add support of HIBMCGE Ethernet Driver

This patch set adds the support of Hisilicon BMC Gigabit Ethernet Driver.

This patch set includes basic Rx/Tx functionality. It also includes
the registration and interrupt codes.

This work provides the initial support to the HIBMCGE and
would incrementally add features or enhancements.
====================

Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>

Author: Paolo Abeni

MAINTAINERS

@@ -10278,6 +10278,12 @@ S:	Maintained
 W:	http://www.hisilicon.com
 F:	drivers/net/ethernet/hisilicon/hns3/
 
+HISILICON NETWORK HIBMCGE DRIVER
+M:	Jijie Shao <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	drivers/net/ethernet/hisilicon/hibmcge/
+
 HISILICON NETWORK SUBSYSTEM DRIVER
 M:	Jian Shen <[email protected]>
 M:	Salil Mehta <[email protected]>

drivers/net/ethernet/hisilicon/Kconfig

@@ -7,7 +7,6 @@ config NET_VENDOR_HISILICON
 	bool "Hisilicon devices"
 	default y
 	depends on OF || ACPI
-	depends on ARM || ARM64 || COMPILE_TEST
 	help
 	  If you have a network (Ethernet) card belonging to this class, say Y.
 
@@ -18,6 +17,8 @@ config NET_VENDOR_HISILICON
 
 if NET_VENDOR_HISILICON
 
+if ARM || ARM64 || COMPILE_TEST
+
 config HIX5HD2_GMAC
 	tristate "Hisilicon HIX5HD2 Family Network Device Support"
 	select PHYLIB
@@ -141,4 +142,19 @@ config HNS3_ENET
 
 endif #HNS3
 
+endif # ARM || ARM64 || COMPILE_TEST
+
+config HIBMCGE
+	tristate "Hisilicon BMC Gigabit Ethernet Device Support"
+	depends on PCI && PCI_MSI
+	select PHYLIB
+	select MOTORCOMM_PHY
+	select REALTEK_PHY
+	help
+	  If you wish to compile a kernel for a BMC with HIBMC-xx_gmac
+	  then you should answer Y to this. This makes this driver suitable for use
+	  on certain boards such as the HIBMC-210.
+
+	  If you are unsure, say N.
+
 endif # NET_VENDOR_HISILICON

drivers/net/ethernet/hisilicon/Makefile

@@ -9,3 +9,4 @@ obj-$(CONFIG_HNS_MDIO) += hns_mdio.o
 obj-$(CONFIG_HNS) += hns/
 obj-$(CONFIG_HNS3) += hns3/
 obj-$(CONFIG_HISI_FEMAC) += hisi_femac.o
+obj-$(CONFIG_HIBMCGE) += hibmcge/

drivers/net/ethernet/hisilicon/hibmcge/Makefile

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Makefile for the HISILICON BMC GE network device drivers.
+#
+
+obj-$(CONFIG_HIBMCGE) += hibmcge.o
+
+hibmcge-objs = hbg_main.o hbg_hw.o hbg_mdio.o hbg_irq.o hbg_txrx.o hbg_ethtool.o

drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h

@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef __HBG_COMMON_H
+#define __HBG_COMMON_H
+
+#include <linux/netdevice.h>
+#include <linux/pci.h>
+#include "hbg_reg.h"
+
+#define HBG_STATUS_DISABLE		0x0
+#define HBG_STATUS_ENABLE		0x1
+#define HBG_RX_SKIP1			0x00
+#define HBG_RX_SKIP2			0x01
+#define HBG_VECTOR_NUM			4
+#define HBG_PCU_CACHE_LINE_SIZE		32
+#define HBG_TX_TIMEOUT_BUF_LEN		1024
+#define HBG_RX_DESCR			0x01
+
+#define HBG_PACKET_HEAD_SIZE	((HBG_RX_SKIP1 + HBG_RX_SKIP2 + \
+				  HBG_RX_DESCR) * HBG_PCU_CACHE_LINE_SIZE)
+
+enum hbg_dir {
+	HBG_DIR_TX = 1 << 0,
+	HBG_DIR_RX = 1 << 1,
+	HBG_DIR_TX_RX = HBG_DIR_TX | HBG_DIR_RX,
+};
+
+enum hbg_tx_state {
+	HBG_TX_STATE_COMPLETE = 0, /* clear state, must fix to 0 */
+	HBG_TX_STATE_START,
+};
+
+enum hbg_nic_state {
+	HBG_NIC_STATE_EVENT_HANDLING = 0,
+};
+
+struct hbg_buffer {
+	u32 state;
+	dma_addr_t state_dma;
+
+	struct sk_buff *skb;
+	dma_addr_t skb_dma;
+	u32 skb_len;
+
+	enum hbg_dir dir;
+	struct hbg_ring *ring;
+	struct hbg_priv *priv;
+};
+
+struct hbg_ring {
+	struct hbg_buffer *queue;
+	dma_addr_t queue_dma;
+
+	union {
+		u32 head;
+		u32 ntc;
+	};
+	union {
+		u32 tail;
+		u32 ntu;
+	};
+	u32 len;
+
+	enum hbg_dir dir;
+	struct hbg_priv *priv;
+	struct napi_struct napi;
+	char *tout_log_buf; /* tx timeout log buffer */
+};
+
+enum hbg_hw_event_type {
+	HBG_HW_EVENT_NONE = 0,
+	HBG_HW_EVENT_INIT, /* driver is loading */
+	HBG_HW_EVENT_RESET,
+};
+
+struct hbg_dev_specs {
+	u32 mac_id;
+	struct sockaddr mac_addr;
+	u32 phy_addr;
+	u32 mdio_frequency;
+	u32 rx_fifo_num;
+	u32 tx_fifo_num;
+	u32 vlan_layers;
+	u32 max_mtu;
+	u32 min_mtu;
+
+	u32 max_frame_len;
+	u32 rx_buf_size;
+};
+
+struct hbg_irq_info {
+	const char *name;
+	u32 mask;
+	bool re_enable;
+	bool need_print;
+	u64 count;
+
+	void (*irq_handle)(struct hbg_priv *priv, struct hbg_irq_info *info);
+};
+
+struct hbg_vector {
+	char name[HBG_VECTOR_NUM][32];
+	struct hbg_irq_info *info_array;
+	u32 info_array_len;
+};
+
+struct hbg_mac {
+	struct mii_bus *mdio_bus;
+	struct phy_device *phydev;
+	u8 phy_addr;
+
+	u32 speed;
+	u32 duplex;
+	u32 autoneg;
+	u32 link_status;
+};
+
+struct hbg_priv {
+	struct net_device *netdev;
+	struct pci_dev *pdev;
+	u8 __iomem *io_base;
+	struct hbg_dev_specs dev_specs;
+	unsigned long state;
+	struct hbg_mac mac;
+	struct hbg_vector vectors;
+	struct hbg_ring tx_ring;
+	struct hbg_ring rx_ring;
+};
+
+#endif

drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include "hbg_ethtool.h"
+
+static const struct ethtool_ops hbg_ethtool_ops = {
+	.get_link		= ethtool_op_get_link,
+	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
+	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
+};
+
+void hbg_ethtool_set_ops(struct net_device *netdev)
+{
+	netdev->ethtool_ops = &hbg_ethtool_ops;
+}

drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef __HBG_ETHTOOL_H
+#define __HBG_ETHTOOL_H
+
+#include <linux/netdevice.h>
+
+void hbg_ethtool_set_ops(struct net_device *netdev);
+
+#endif