[PATCH V3 net-next 0/7] Support some features for the HIBMCGE driver

[PATCH V3 net-next 0/7] Support some features for the HIBMCGE driver

[Jijie Shao]

In this patch series, The HIBMCGE driver implements some functions
such as dump register, unicast MAC address filtering, debugfs and reset.

---
ChangeLog:
v2 -> v3:
  -  Not not dump in ethtool statistics which can be accessed via standard APIs,
     suggested by Jakub. The relevant patche is removed from this patch series,
     and the statistically relevant patches will be sent separately.
  v2: https://lore.kernel.org/all/20241026115740.633503-1-shaojijie@huawei.com/
v1 -> v2:
  - Remove debugfs file 'dev_specs' because the dump register
    does the same thing, suggested by Andrew.
  - Move 'tx timeout cnt' from debugfs to ethtool -S, suggested by Andrew.
  - Ignore the error code of the debugfs initialization failure, suggested by Andrew.
  - Add a new patch for debugfs file 'irq_info', suggested by Andrew.
  - Add somme comments for filtering, suggested by Andrew.
  - Not pass back ASCII text in dump register, suggested by Andrew.
  v1: https://lore.kernel.org/all/20241023134213.3359092-1-shaojijie@huawei.com/
---

Jijie Shao (7):
  net: hibmcge: Add debugfs supported in this module
  net: hibmcge: Add irq_info file to debugfs
  net: hibmcge: Add unicast frame filter supported in this module
  net: hibmcge: Add register dump supported in this module
  net: hibmcge: Add pauseparam supported in this module
  net: hibmcge: Add reset supported in this module
  net: hibmcge: Add nway_reset supported in this module

 .../net/ethernet/hisilicon/hibmcge/Makefile   |   3 +-
 .../ethernet/hisilicon/hibmcge/hbg_common.h   |  33 +++
 .../ethernet/hisilicon/hibmcge/hbg_debugfs.c  | 165 ++++++++++++
 .../ethernet/hisilicon/hibmcge/hbg_debugfs.h  |  12 +
 .../net/ethernet/hisilicon/hibmcge/hbg_err.c  | 138 ++++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_err.h  |  13 +
 .../ethernet/hisilicon/hibmcge/hbg_ethtool.c  | 178 +++++++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.c   |  48 +++-
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.h   |   6 +-
 .../net/ethernet/hisilicon/hibmcge/hbg_main.c | 238 ++++++++++++++++--
 .../net/ethernet/hisilicon/hibmcge/hbg_reg.h  |  39 +++
 11 files changed, 845 insertions(+), 28 deletions(-)
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.h
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_err.h

-- 
2.33.0

[PATCH V3 net-next 1/7] net: hibmcge: Add debugfs supported in this module

[Jijie Shao]

This patch initializes debugfs and creates root directory
for each device. The tx_ring and rx_ring debugfs files
are implemented together.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
ChangeLog:
v1 -> v2:
  - Remove debugfs file 'dev_specs' because the dump register
    does the same thing, suggested by Andrew.
  - Move 'tx timeout cnt' from debugfs to ethtool -S, suggested by Andrew.
  - Add a new patch for debugfs file 'irq_info', suggested by Andrew.
  - Ignore the error code of the debugfs initialization failure, suggested by Andrew.
v1: https://lore.kernel.org/all/20241023134213.3359092-3-shaojijie@huawei.com/
---
 .../net/ethernet/hisilicon/hibmcge/Makefile   |  3 +-
 .../ethernet/hisilicon/hibmcge/hbg_debugfs.c  | 95 +++++++++++++++++++
 .../ethernet/hisilicon/hibmcge/hbg_debugfs.h  | 12 +++
 .../net/ethernet/hisilicon/hibmcge/hbg_main.c | 29 +++++-
 4 files changed, 136 insertions(+), 3 deletions(-)
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.h

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/Makefile b/drivers/net/ethernet/hisilicon/hibmcge/Makefile
index ae58ac38c206..1a0ec2fb8c24 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/Makefile
+++ b/drivers/net/ethernet/hisilicon/hibmcge/Makefile
@@ -5,4 +5,5 @@
 
 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
+hibmcge-objs = hbg_main.o hbg_hw.o hbg_mdio.o hbg_irq.o hbg_txrx.o hbg_ethtool.o \
+		hbg_debugfs.o
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
new file mode 100644
index 000000000000..9c0b2c7231fe
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/etherdevice.h>
+#include <linux/seq_file.h>
+#include "hbg_common.h"
+#include "hbg_debugfs.h"
+#include "hbg_hw.h"
+#include "hbg_irq.h"
+#include "hbg_txrx.h"
+
+static struct dentry *hbg_dbgfs_root;
+
+struct hbg_dbg_info {
+	const char *name;
+	int (*read)(struct seq_file *seq, void *data);
+};
+
+#define hbg_get_bool_str(state) ((state) ? "true" : "false")
+
+static void hbg_dbg_ring(struct hbg_priv *priv, struct hbg_ring *ring,
+			 struct seq_file *s)
+{
+	u32 irq_mask = ring->dir == HBG_DIR_TX ? HBG_INT_MSK_TX_B :
+						 HBG_INT_MSK_RX_B;
+
+	seq_printf(s, "ring used num: %u\n",
+		   hbg_get_queue_used_num(ring));
+	seq_printf(s, "ring max num: %u\n", ring->len);
+	seq_printf(s, "ring head: %u, tail: %u\n", ring->head, ring->tail);
+	seq_printf(s, "fifo used num: %u\n",
+		   hbg_hw_get_fifo_used_num(priv, ring->dir));
+	seq_printf(s, "fifo max num: %u\n",
+		   hbg_get_spec_fifo_max_num(priv, ring->dir));
+	seq_printf(s, "irq enabled: %s\n",
+		   hbg_get_bool_str(hbg_hw_irq_is_enabled(priv, irq_mask)));
+}
+
+static int hbg_dbg_tx_ring(struct seq_file *s, void *unused)
+{
+	struct net_device *netdev = dev_get_drvdata(s->private);
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	hbg_dbg_ring(priv, &priv->tx_ring, s);
+	return 0;
+}
+
+static int hbg_dbg_rx_ring(struct seq_file *s, void *unused)
+{
+	struct net_device *netdev = dev_get_drvdata(s->private);
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	hbg_dbg_ring(priv, &priv->rx_ring, s);
+	return 0;
+}
+
+static const struct hbg_dbg_info hbg_dbg_infos[] = {
+	{ "tx_ring", hbg_dbg_tx_ring },
+	{ "rx_ring", hbg_dbg_rx_ring },
+};
+
+static void hbg_debugfs_uninit(void *data)
+{
+	debugfs_remove_recursive((struct dentry *)data);
+}
+
+void hbg_debugfs_init(struct hbg_priv *priv)
+{
+	const char *name = pci_name(priv->pdev);
+	struct device *dev = &priv->pdev->dev;
+	struct dentry *root;
+	u32 i;
+
+	root = debugfs_create_dir(name, hbg_dbgfs_root);
+
+	for (i = 0; i < ARRAY_SIZE(hbg_dbg_infos); i++)
+		debugfs_create_devm_seqfile(dev, hbg_dbg_infos[i].name,
+					    root, hbg_dbg_infos[i].read);
+
+	/* Ignore the failure because debugfs is not a key feature. */
+	devm_add_action_or_reset(dev, hbg_debugfs_uninit, root);
+}
+
+void hbg_debugfs_register(void)
+{
+	hbg_dbgfs_root = debugfs_create_dir("hibmcge", NULL);
+}
+
+void hbg_debugfs_unregister(void)
+{
+	debugfs_remove_recursive(hbg_dbgfs_root);
+	hbg_dbgfs_root = NULL;
+}
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.h
new file mode 100644
index 000000000000..80670d66bbeb
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef __HBG_DEBUGFS_H
+#define __HBG_DEBUGFS_H
+
+void hbg_debugfs_register(void);
+void hbg_debugfs_unregister(void);
+
+void hbg_debugfs_init(struct hbg_priv *priv);
+
+#endif
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
index 75505fb5cc4a..7a03fdfa32a7 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
@@ -11,6 +11,7 @@
 #include "hbg_irq.h"
 #include "hbg_mdio.h"
 #include "hbg_txrx.h"
+#include "hbg_debugfs.h"
 
 static void hbg_change_mtu(struct hbg_priv *priv, int new_mtu);
 
@@ -160,7 +161,12 @@ static int hbg_init(struct hbg_priv *priv)
 	if (ret)
 		return ret;
 
-	return hbg_mdio_init(priv);
+	ret = hbg_mdio_init(priv);
+	if (ret)
+		return ret;
+
+	hbg_debugfs_init(priv);
+	return 0;
 }
 
 static int hbg_pci_init(struct pci_dev *pdev)
@@ -245,7 +251,26 @@ static struct pci_driver hbg_driver = {
 	.id_table	= hbg_pci_tbl,
 	.probe		= hbg_probe,
 };
-module_pci_driver(hbg_driver);
+
+static int __init hbg_module_init(void)
+{
+	int ret;
+
+	hbg_debugfs_register();
+	ret = pci_register_driver(&hbg_driver);
+	if (ret)
+		hbg_debugfs_unregister();
+
+	return ret;
+}
+module_init(hbg_module_init);
+
+static void __exit hbg_module_exit(void)
+{
+	pci_unregister_driver(&hbg_driver);
+	hbg_debugfs_unregister();
+}
+module_exit(hbg_module_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
-- 
2.33.0

[PATCH V3 net-next 2/7] net: hibmcge: Add irq_info file to debugfs

[Jijie Shao]

the driver requested three interrupts: "tx", "rx", "err".
The err interrupt is a summary interrupt. We distinguish
different errors based on the status register and mask.

With "cat /proc/interrupts | grep hibmcge",
we can't distinguish the detailed cause of the error,
so we added this file to debugfs.

the following effects are achieved:
[root@localhost sjj]# cat /sys/kernel/debug/hibmcge/0000\:83\:00.1/irq_info
RX                  : enabled: true , logged: false, count: 0
TX                  : enabled: true , logged: false, count: 0
MAC_MII_FIFO_ERR    : enabled: false, logged: true , count: 0
MAC_PCS_RX_FIFO_ERR : enabled: false, logged: true , count: 0
MAC_PCS_TX_FIFO_ERR : enabled: false, logged: true , count: 0
MAC_APP_RX_FIFO_ERR : enabled: false, logged: true , count: 0
MAC_APP_TX_FIFO_ERR : enabled: false, logged: true , count: 0
SRAM_PARITY_ERR     : enabled: true , logged: true , count: 0
TX_AHB_ERR          : enabled: true , logged: true , count: 0
RX_BUF_AVL          : enabled: true , logged: false, count: 0
REL_BUF_ERR         : enabled: true , logged: true , count: 0
TXCFG_AVL           : enabled: true , logged: false, count: 0
TX_DROP             : enabled: true , logged: false, count: 0
RX_DROP             : enabled: true , logged: false, count: 0
RX_AHB_ERR          : enabled: true , logged: true , count: 0
MAC_FIFO_ERR        : enabled: true , logged: false, count: 0
RBREQ_ERR           : enabled: true , logged: false, count: 0
WE_ERR              : enabled: true , logged: false, count: 0

The irq framework of hibmcge driver also includes tx/rx interrupts.
Therefore, TX and RX are not moved separately form this file.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
 .../ethernet/hisilicon/hibmcge/hbg_debugfs.c  | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
index 9c0b2c7231fe..99d4e22a1d6f 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
@@ -56,9 +56,31 @@ static int hbg_dbg_rx_ring(struct seq_file *s, void *unused)
 	return 0;
 }
 
+static int hbg_dbg_irq_info(struct seq_file *s, void *unused)
+{
+	struct net_device *netdev = dev_get_drvdata(s->private);
+	struct hbg_priv *priv = netdev_priv(netdev);
+	struct hbg_irq_info *info;
+	u32 i;
+
+	for (i = 0; i < priv->vectors.info_array_len; i++) {
+		info = &priv->vectors.info_array[i];
+		seq_printf(s,
+			   "%-20s: enabled: %-5s, logged: %-5s, count: %llu\n",
+			   info->name,
+			   hbg_get_bool_str(hbg_hw_irq_is_enabled(priv,
+								  info->mask)),
+			   hbg_get_bool_str(info->need_print),
+			   info->count);
+	}
+
+	return 0;
+}
+
 static const struct hbg_dbg_info hbg_dbg_infos[] = {
 	{ "tx_ring", hbg_dbg_tx_ring },
 	{ "rx_ring", hbg_dbg_rx_ring },
+	{ "irq_info", hbg_dbg_irq_info },
 };
 
 static void hbg_debugfs_uninit(void *data)
-- 
2.33.0

[PATCH V3 net-next 3/7] net: hibmcge: Add unicast frame filter supported in this module

[Jijie Shao]

MAC supports filtering unmatched unicast packets according to
the MAC address table. This patch adds the support for
unicast frame filtering.

To support automatic restoration of MAC entries
after reset, the driver saves a copy of MAC entries in the driver.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
ChangeLog:
v1 -> v2:
  - Add somme comments for filtering, suggested by Andrew.
v1: https://lore.kernel.org/all/20241023134213.3359092-4-shaojijie@huawei.com/
---
 .../ethernet/hisilicon/hibmcge/hbg_common.h   |  13 ++
 .../ethernet/hisilicon/hibmcge/hbg_debugfs.c  |  25 +++
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.c   |  17 +-
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.h   |   3 +-
 .../net/ethernet/hisilicon/hibmcge/hbg_main.c | 149 +++++++++++++++++-
 .../net/ethernet/hisilicon/hibmcge/hbg_reg.h  |   3 +
 6 files changed, 204 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
index 96daf058d387..e071f77754fe 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
@@ -84,6 +84,7 @@ struct hbg_dev_specs {
 	u32 vlan_layers;
 	u32 max_mtu;
 	u32 min_mtu;
+	u32 uc_mac_num;
 
 	u32 max_frame_len;
 	u32 rx_buf_size;
@@ -116,6 +117,17 @@ struct hbg_mac {
 	u32 link_status;
 };
 
+struct hbg_mac_table_entry {
+	u8 addr[ETH_ALEN];
+};
+
+struct hbg_mac_filter {
+	struct hbg_mac_table_entry *mac_table;
+	u32 table_max_len;
+	bool table_overflow;
+	bool enabled;
+};
+
 struct hbg_priv {
 	struct net_device *netdev;
 	struct pci_dev *pdev;
@@ -126,6 +138,7 @@ struct hbg_priv {
 	struct hbg_vector vectors;
 	struct hbg_ring tx_ring;
 	struct hbg_ring rx_ring;
+	struct hbg_mac_filter filter;
 };
 
 #endif
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
index 99d4e22a1d6f..2f9d30a51f62 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
@@ -77,10 +77,35 @@ static int hbg_dbg_irq_info(struct seq_file *s, void *unused)
 	return 0;
 }
 
+static int hbg_dbg_mac_table(struct seq_file *s, void *unused)
+{
+	struct net_device *netdev = dev_get_drvdata(s->private);
+	struct hbg_priv *priv = netdev_priv(netdev);
+	struct hbg_mac_filter *filter;
+	u32 i;
+
+	filter = &priv->filter;
+	seq_printf(s, "mac addr max count: %u\n", filter->table_max_len);
+	seq_printf(s, "filter enabled: %s\n",
+		   hbg_get_bool_str(filter->enabled));
+	seq_printf(s, "table overflow: %s\n",
+		   hbg_get_bool_str(filter->table_overflow));
+
+	for (i = 0; i < filter->table_max_len; i++) {
+		if (is_zero_ether_addr(filter->mac_table[i].addr))
+			continue;
+
+		seq_printf(s, "[%u] %pM\n", i, filter->mac_table[i].addr);
+	}
+
+	return 0;
+}
+
 static const struct hbg_dbg_info hbg_dbg_infos[] = {
 	{ "tx_ring", hbg_dbg_tx_ring },
 	{ "rx_ring", hbg_dbg_rx_ring },
 	{ "irq_info", hbg_dbg_irq_info },
+	{ "mac_talbe", hbg_dbg_mac_table },
 };
 
 static void hbg_debugfs_uninit(void *data)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
index 05295c2ad439..29d66a0ea0a6 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
@@ -67,6 +67,8 @@ static int hbg_hw_dev_specs_init(struct hbg_priv *priv)
 	specs->vlan_layers = hbg_reg_read(priv, HBG_REG_VLAN_LAYERS_ADDR);
 	specs->rx_fifo_num = hbg_reg_read(priv, HBG_REG_RX_FIFO_NUM_ADDR);
 	specs->tx_fifo_num = hbg_reg_read(priv, HBG_REG_TX_FIFO_NUM_ADDR);
+	specs->uc_mac_num = hbg_reg_read(priv, HBG_REG_UC_MAC_NUM_ADDR);
+
 	mac_addr = hbg_reg_read64(priv, HBG_REG_MAC_ADDR_ADDR);
 	u64_to_ether_addr(mac_addr, (u8 *)specs->mac_addr.sa_data);
 
@@ -135,9 +137,13 @@ void hbg_hw_irq_enable(struct hbg_priv *priv, u32 mask, bool enable)
 	hbg_reg_write(priv, HBG_REG_CF_INTRPT_MSK_ADDR, value);
 }
 
-void hbg_hw_set_uc_addr(struct hbg_priv *priv, u64 mac_addr)
+void hbg_hw_set_uc_addr(struct hbg_priv *priv, u64 mac_addr, u32 index)
 {
-	hbg_reg_write64(priv, HBG_REG_STATION_ADDR_LOW_2_ADDR, mac_addr);
+	u32 addr;
+
+	/* mac addr is u64, so the addr offset is 0x8 */
+	addr = HBG_REG_STATION_ADDR_LOW_2_ADDR + (index * 0x8);
+	hbg_reg_write64(priv, addr, mac_addr);
 }
 
 static void hbg_hw_set_pcu_max_frame_len(struct hbg_priv *priv,
@@ -207,6 +213,13 @@ void hbg_hw_adjust_link(struct hbg_priv *priv, u32 speed, u32 duplex)
 			    HBG_REG_DUPLEX_B, duplex);
 }
 
+/* only support uc filter */
+void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable)
+{
+	hbg_reg_write_field(priv, HBG_REG_REC_FILT_CTRL_ADDR,
+			    HBG_REG_REC_FILT_CTRL_UC_MATCH_EN_B, enable);
+}
+
 static void hbg_hw_init_transmit_ctrl(struct hbg_priv *priv)
 {
 	u32 ctrl = 0;
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
index 14fb39241c93..6eb4b7d2cba8 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
@@ -51,9 +51,10 @@ bool hbg_hw_irq_is_enabled(struct hbg_priv *priv, u32 mask);
 void hbg_hw_irq_enable(struct hbg_priv *priv, u32 mask, bool enable);
 void hbg_hw_set_mtu(struct hbg_priv *priv, u16 mtu);
 void hbg_hw_mac_enable(struct hbg_priv *priv, u32 enable);
-void hbg_hw_set_uc_addr(struct hbg_priv *priv, u64 mac_addr);
+void hbg_hw_set_uc_addr(struct hbg_priv *priv, u64 mac_addr, u32 index);
 u32 hbg_hw_get_fifo_used_num(struct hbg_priv *priv, enum hbg_dir dir);
 void hbg_hw_set_tx_desc(struct hbg_priv *priv, struct hbg_tx_desc *tx_desc);
 void hbg_hw_fill_buffer(struct hbg_priv *priv, u32 buffer_dma_addr);
+void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable);
 
 #endif
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
index 7a03fdfa32a7..0ad03681b706 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
@@ -57,7 +57,7 @@ static int hbg_hw_txrx_clear(struct hbg_priv *priv)
 
 	/* After reset, regs need to be reconfigured */
 	hbg_hw_init(priv);
-	hbg_hw_set_uc_addr(priv, ether_addr_to_u64(priv->netdev->dev_addr));
+	hbg_hw_set_uc_addr(priv, ether_addr_to_u64(priv->netdev->dev_addr), 0);
 	hbg_change_mtu(priv, priv->netdev->mtu);
 
 	return 0;
@@ -75,19 +75,136 @@ static int hbg_net_stop(struct net_device *netdev)
 	return hbg_hw_txrx_clear(priv);
 }
 
+static void hbg_update_promisc_mode(struct net_device *netdev)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	/* Only when not table_overflow, and netdev->flags not set IFF_PROMISC,
+	 * The MAC filter will be enabled.
+	 * Otherwise the filter will be disabled.
+	 */
+	priv->filter.enabled = !(priv->filter.table_overflow ||
+				 (netdev->flags & IFF_PROMISC));
+	hbg_hw_set_mac_filter_enable(priv, priv->filter.enabled);
+}
+
+static void hbg_set_mac_to_mac_table(struct hbg_priv *priv,
+				     u32 index, const u8 *addr)
+{
+	if (addr) {
+		ether_addr_copy(priv->filter.mac_table[index].addr, addr);
+		hbg_hw_set_uc_addr(priv, ether_addr_to_u64(addr), index);
+	} else {
+		eth_zero_addr(priv->filter.mac_table[index].addr);
+		hbg_hw_set_uc_addr(priv, 0, index);
+	}
+}
+
+static int hbg_get_index_from_mac_table(struct hbg_priv *priv,
+					const u8 *addr, u32 *index)
+{
+	u32 i;
+
+	for (i = 0; i < priv->filter.table_max_len; i++)
+		if (ether_addr_equal(priv->filter.mac_table[i].addr, addr)) {
+			*index = i;
+			return 0;
+		}
+
+	return -EINVAL;
+}
+
+static int hbg_add_mac_to_filter(struct hbg_priv *priv, const u8 *addr)
+{
+	u32 index;
+
+	/* already exists */
+	if (!hbg_get_index_from_mac_table(priv, addr, &index))
+		return 0;
+
+	for (index = 0; index < priv->filter.table_max_len; index++)
+		if (is_zero_ether_addr(priv->filter.mac_table[index].addr)) {
+			hbg_set_mac_to_mac_table(priv, index, addr);
+			return 0;
+		}
+
+	/* The filter status needs to be changed and
+	 * log need to be recorded only when the first overflow occurs.
+	 * In other cases, only the error code is returned.
+	 */
+	if (!priv->filter.table_overflow) {
+		priv->filter.table_overflow = true;
+		hbg_update_promisc_mode(priv->netdev);
+		dev_info(&priv->pdev->dev, "mac table is overflow\n");
+	}
+
+	return -ENOSPC;
+}
+
+static void hbg_del_mac_from_filter(struct hbg_priv *priv, const u8 *addr)
+{
+	u32 index;
+
+	/* not exists */
+	if (hbg_get_index_from_mac_table(priv, addr, &index))
+		return;
+
+	hbg_set_mac_to_mac_table(priv, index, NULL);
+
+	if (priv->filter.table_overflow) {
+		priv->filter.table_overflow = false;
+		hbg_update_promisc_mode(priv->netdev);
+		dev_info(&priv->pdev->dev, "mac table is not full\n");
+	}
+}
+
+static int hbg_uc_sync(struct net_device *netdev, const unsigned char *addr)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	return hbg_add_mac_to_filter(priv, addr);
+}
+
+static int hbg_uc_unsync(struct net_device *netdev, const unsigned char *addr)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	if (ether_addr_equal(netdev->dev_addr, (u8 *)addr))
+		return 0;
+
+	hbg_del_mac_from_filter(priv, addr);
+	return 0;
+}
+
+static void hbg_net_set_rx_mode(struct net_device *netdev)
+{
+	hbg_update_promisc_mode(netdev);
+	__dev_uc_sync(netdev, hbg_uc_sync, hbg_uc_unsync);
+}
+
 static int hbg_net_set_mac_address(struct net_device *netdev, void *addr)
 {
 	struct hbg_priv *priv = netdev_priv(netdev);
 	u8 *mac_addr;
+	bool is_exists;
+	u32 index;
 
 	mac_addr = ((struct sockaddr *)addr)->sa_data;
 
 	if (!is_valid_ether_addr(mac_addr))
 		return -EADDRNOTAVAIL;
 
-	hbg_hw_set_uc_addr(priv, ether_addr_to_u64(mac_addr));
-	dev_addr_set(netdev, mac_addr);
+	/* The index of host mac is always 0.
+	 * If new mac address already exists,
+	 * delete the existing mac address and
+	 * add it to the position with index 0.
+	 */
+	is_exists = !hbg_get_index_from_mac_table(priv, mac_addr, &index);
+	hbg_set_mac_to_mac_table(priv, 0, mac_addr);
+	if (is_exists)
+		hbg_set_mac_to_mac_table(priv, index, NULL);
 
+	dev_addr_set(netdev, mac_addr);
 	return 0;
 }
 
@@ -143,8 +260,28 @@ static const struct net_device_ops hbg_netdev_ops = {
 	.ndo_set_mac_address	= hbg_net_set_mac_address,
 	.ndo_change_mtu		= hbg_net_change_mtu,
 	.ndo_tx_timeout		= hbg_net_tx_timeout,
+	.ndo_set_rx_mode	= hbg_net_set_rx_mode,
 };
 
+static int hbg_mac_filter_init(struct hbg_priv *priv)
+{
+	struct hbg_dev_specs *dev_specs = &priv->dev_specs;
+	struct hbg_mac_filter *filter = &priv->filter;
+	struct hbg_mac_table_entry *tmp_table;
+
+	tmp_table = devm_kcalloc(&priv->pdev->dev, dev_specs->uc_mac_num,
+				 sizeof(*tmp_table), GFP_KERNEL);
+	if (!tmp_table)
+		return -ENOMEM;
+
+	filter->mac_table = tmp_table;
+	filter->table_max_len = dev_specs->uc_mac_num;
+	filter->enabled = true;
+
+	hbg_hw_set_mac_filter_enable(priv, filter->enabled);
+	return 0;
+}
+
 static int hbg_init(struct hbg_priv *priv)
 {
 	int ret;
@@ -165,6 +302,10 @@ static int hbg_init(struct hbg_priv *priv)
 	if (ret)
 		return ret;
 
+	ret = hbg_mac_filter_init(priv);
+	if (ret)
+		return ret;
+
 	hbg_debugfs_init(priv);
 	return 0;
 }
@@ -222,6 +363,8 @@ static int hbg_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (ret)
 		return ret;
 
+	netdev->priv_flags |= IFF_UNICAST_FLT;
+
 	netdev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
 	netdev->max_mtu = priv->dev_specs.max_mtu;
 	netdev->min_mtu = priv->dev_specs.min_mtu;
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
index 57d81c6d7633..8993f57ecea4 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
@@ -10,6 +10,7 @@
 #define HBG_REG_MAC_ID_ADDR			0x0008
 #define HBG_REG_PHY_ID_ADDR			0x000C
 #define HBG_REG_MAC_ADDR_ADDR			0x0010
+#define HBG_REG_UC_MAC_NUM_ADDR			0x0018
 #define HBG_REG_MDIO_FREQ_ADDR			0x0024
 #define HBG_REG_MAX_MTU_ADDR			0x0028
 #define HBG_REG_MIN_MTU_ADDR			0x002C
@@ -47,6 +48,8 @@
 #define HBG_REG_TRANSMIT_CTRL_PAD_EN_B		BIT(7)
 #define HBG_REG_TRANSMIT_CTRL_CRC_ADD_B		BIT(6)
 #define HBG_REG_TRANSMIT_CTRL_AN_EN_B		BIT(5)
+#define HBG_REG_REC_FILT_CTRL_ADDR		(HBG_REG_SGMII_BASE + 0x0064)
+#define HBG_REG_REC_FILT_CTRL_UC_MATCH_EN_B	BIT(0)
 #define HBG_REG_CF_CRC_STRIP_ADDR		(HBG_REG_SGMII_BASE + 0x01B0)
 #define HBG_REG_CF_CRC_STRIP_B			BIT(0)
 #define HBG_REG_MODE_CHANGE_EN_ADDR		(HBG_REG_SGMII_BASE + 0x01B4)
-- 
2.33.0

[PATCH V3 net-next 4/7] net: hibmcge: Add register dump supported in this module

[Jijie Shao]

The dump register is an effective way to analyze problems.

To ensure code flexibility, each register contains the type,
offset, and value information. The ethtool does the pretty print
based on these information.

The driver can dynamically add or delete registers that need to be dumped
in the future because information such as type and offset is contained.
ethtool always can do pretty print.

With the ethtool of a specific version,
the following effects are achieved:
[root@localhost sjj]# ./ethtool -d enp131s0f1
[SPEC] VALID                    [0x0000]: 0x00000001
[SPEC] EVENT_REQ                [0x0004]: 0x00000000
[SPEC] MAC_ID                   [0x0008]: 0x00000002
[SPEC] PHY_ADDR                 [0x000c]: 0x00000002
[SPEC] MAC_ADDR_L               [0x0010]: 0x00000808
[SPEC] MAC_ADDR_H               [0x0014]: 0x08080802
[SPEC] UC_MAX_NUM               [0x0018]: 0x00000004
[SPEC] MAX_MTU                  [0x0028]: 0x00000fc2
[SPEC] MIN_MTU                  [0x002c]: 0x00000100
[SPEC] TX_FIFO_NUM              [0x0030]: 0x00000040
[SPEC] RX_FIFO_NUM              [0x0034]: 0x0000007f
[SPEC] VLAN_LAYERS              [0x0038]: 0x00000002
[MDIO] COMMAND_REG              [0x0000]: 0x0000185f
[MDIO] ADDR_REG                 [0x0004]: 0x00000000
[MDIO] WDATA_REG                [0x0008]: 0x0000a000
[MDIO] RDATA_REG                [0x000c]: 0x00000000
[MDIO] STA_REG                  [0x0010]: 0x00000000
[GMAC] DUPLEX_TYPE              [0x0008]: 0x00000001
[GMAC] FD_FC_TYPE               [0x000c]: 0x00008808
[GMAC] FC_TX_TIMER              [0x001c]: 0x000000ff
[GMAC] FD_FC_ADDR_LOW           [0x0020]: 0xc2000001
[GMAC] FD_FC_ADDR_HIGH          [0x0024]: 0x00000180
[GMAC] MAX_FRM_SIZE             [0x003c]: 0x000005f6
[GMAC] PORT_MODE                [0x0040]: 0x00000002
[GMAC] PORT_EN                  [0x0044]: 0x00000006
...

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
ChangeLog:
v1 -> v2:
  - Not pass back ASCII text in dump register, suggested by Andrew.
v1: https://lore.kernel.org/all/20241023134213.3359092-5-shaojijie@huawei.com/
---
 .../ethernet/hisilicon/hibmcge/hbg_ethtool.c  | 140 ++++++++++++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_reg.h  |  34 +++++
 2 files changed, 174 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
index c3370114aef3..e7f169d2abb7 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
@@ -3,12 +3,152 @@
 
 #include <linux/ethtool.h>
 #include <linux/phy.h>
+#include "hbg_common.h"
 #include "hbg_ethtool.h"
+#include "hbg_hw.h"
+
+enum hbg_reg_dump_type {
+	HBG_DUMP_REG_TYPE_SPEC = 0,
+	HBG_DUMP_REG_TYPE_MDIO,
+	HBG_DUMP_REG_TYPE_GMAC,
+	HBG_DUMP_REG_TYPE_PCU,
+};
+
+struct hbg_reg_info {
+	u32 type;
+	u32 offset;
+	u32 val;
+};
+
+#define HBG_DUMP_SPEC_I(offset) {HBG_DUMP_REG_TYPE_SPEC, offset, 0}
+#define HBG_DUMP_MDIO_I(offset) {HBG_DUMP_REG_TYPE_MDIO, offset, 0}
+#define HBG_DUMP_GMAC_I(offset) {HBG_DUMP_REG_TYPE_GMAC, offset, 0}
+#define HBG_DUMP_PCU_I(offset) {HBG_DUMP_REG_TYPE_PCU, offset, 0}
+
+static const struct hbg_reg_info hbg_dump_reg_infos[] = {
+	/* dev specs */
+	HBG_DUMP_SPEC_I(HBG_REG_SPEC_VALID_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_EVENT_REQ_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_MAC_ID_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_PHY_ID_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_MAC_ADDR_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_MAC_ADDR_HIGH_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_UC_MAC_NUM_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_MDIO_FREQ_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_MAX_MTU_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_MIN_MTU_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_TX_FIFO_NUM_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_RX_FIFO_NUM_ADDR),
+	HBG_DUMP_SPEC_I(HBG_REG_VLAN_LAYERS_ADDR),
+
+	/* mdio */
+	HBG_DUMP_MDIO_I(HBG_REG_MDIO_COMMAND_ADDR),
+	HBG_DUMP_MDIO_I(HBG_REG_MDIO_ADDR_ADDR),
+	HBG_DUMP_MDIO_I(HBG_REG_MDIO_WDATA_ADDR),
+	HBG_DUMP_MDIO_I(HBG_REG_MDIO_RDATA_ADDR),
+	HBG_DUMP_MDIO_I(HBG_REG_MDIO_STA_ADDR),
+
+	/* gmac */
+	HBG_DUMP_GMAC_I(HBG_REG_DUPLEX_TYPE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_FD_FC_TYPE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_FC_TX_TIMER_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_FD_FC_ADDR_LOW_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_FD_FC_ADDR_HIGH_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_MAX_FRAME_SIZE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_PORT_MODE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_PORT_ENABLE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_PAUSE_ENABLE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_AN_NEG_STATE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_TRANSMIT_CTRL_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_REC_FILT_CTRL_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_LINE_LOOP_BACK_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_CF_CRC_STRIP_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_MODE_CHANGE_EN_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_LOOP_REG_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_RECV_CTRL_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_VLAN_CODE_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_LOW_0_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_HIGH_0_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_LOW_1_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_HIGH_1_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_LOW_2_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_HIGH_2_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_LOW_3_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_HIGH_3_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_LOW_4_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_HIGH_4_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_LOW_5_ADDR),
+	HBG_DUMP_GMAC_I(HBG_REG_STATION_ADDR_HIGH_5_ADDR),
+
+	/* pcu */
+	HBG_DUMP_PCU_I(HBG_REG_TX_FIFO_THRSLD_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_RX_FIFO_THRSLD_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CFG_FIFO_THRSLD_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_INTRPT_MSK_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_INTRPT_STAT_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_INTRPT_CLR_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_TX_BUS_ERR_ADDR_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_RX_BUS_ERR_ADDR_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_MAX_FRAME_LEN_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_DEBUG_ST_MCH_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_FIFO_CURR_STATUS_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_FIFO_HIST_STATUS_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_CFF_DATA_NUM_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_TX_PAUSE_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_RX_CFF_ADDR_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_RX_BUF_SIZE_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_BUS_CTRL_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_RX_CTRL_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_RX_PKT_MODE_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_DBG_ST0_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_DBG_ST1_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_DBG_ST2_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_BUS_RST_EN_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_IND_TXINT_MSK_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_IND_TXINT_STAT_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_IND_TXINT_CLR_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_IND_RXINT_MSK_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_IND_RXINT_STAT_ADDR),
+	HBG_DUMP_PCU_I(HBG_REG_CF_IND_RXINT_CLR_ADDR),
+};
+
+static const u32 hbg_dump_type_base_array[] = {
+	[HBG_DUMP_REG_TYPE_SPEC] = 0,
+	[HBG_DUMP_REG_TYPE_MDIO] = HBG_REG_MDIO_BASE,
+	[HBG_DUMP_REG_TYPE_GMAC] = HBG_REG_SGMII_BASE,
+	[HBG_DUMP_REG_TYPE_PCU] = HBG_REG_SGMII_BASE,
+};
+
+static int hbg_ethtool_get_regs_len(struct net_device *netdev)
+{
+	return ARRAY_SIZE(hbg_dump_reg_infos) * sizeof(struct hbg_reg_info);
+}
+
+static void hbg_ethtool_get_regs(struct net_device *netdev,
+				 struct ethtool_regs *regs, void *data)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+	struct hbg_reg_info *info;
+	u32 i, offset = 0;
+
+	regs->version = 0;
+	for (i = 0; i < ARRAY_SIZE(hbg_dump_reg_infos); i++) {
+		info = data + offset;
+
+		*info = hbg_dump_reg_infos[i];
+		info->val = hbg_reg_read(priv, info->offset);
+		info->offset -= hbg_dump_type_base_array[info->type];
+
+		offset += sizeof(*info);
+	}
+}
 
 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,
+	.get_regs_len		= hbg_ethtool_get_regs_len,
+	.get_regs		= hbg_ethtool_get_regs,
 };
 
 void hbg_ethtool_set_ops(struct net_device *netdev)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
index 8993f57ecea4..665666712c7c 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
@@ -10,6 +10,7 @@
 #define HBG_REG_MAC_ID_ADDR			0x0008
 #define HBG_REG_PHY_ID_ADDR			0x000C
 #define HBG_REG_MAC_ADDR_ADDR			0x0010
+#define HBG_REG_MAC_ADDR_HIGH_ADDR		0x0014
 #define HBG_REG_UC_MAC_NUM_ADDR			0x0018
 #define HBG_REG_MDIO_FREQ_ADDR			0x0024
 #define HBG_REG_MAX_MTU_ADDR			0x0028
@@ -29,6 +30,7 @@
 #define HBG_REG_MDIO_COMMAND_OP_M		GENMASK(11, 10)
 #define HBG_REG_MDIO_COMMAND_PRTAD_M		GENMASK(9, 5)
 #define HBG_REG_MDIO_COMMAND_DEVAD_M		GENMASK(4, 0)
+#define HBG_REG_MDIO_ADDR_ADDR			(HBG_REG_MDIO_BASE + 0x0004)
 #define HBG_REG_MDIO_WDATA_ADDR			(HBG_REG_MDIO_BASE + 0x0008)
 #define HBG_REG_MDIO_WDATA_M			GENMASK(15, 0)
 #define HBG_REG_MDIO_RDATA_ADDR			(HBG_REG_MDIO_BASE + 0x000C)
@@ -37,6 +39,10 @@
 /* GMAC */
 #define HBG_REG_SGMII_BASE			0x10000
 #define HBG_REG_DUPLEX_TYPE_ADDR		(HBG_REG_SGMII_BASE + 0x0008)
+#define HBG_REG_FD_FC_TYPE_ADDR			(HBG_REG_SGMII_BASE + 0x000C)
+#define HBG_REG_FC_TX_TIMER_ADDR		(HBG_REG_SGMII_BASE + 0x001C)
+#define HBG_REG_FD_FC_ADDR_LOW_ADDR		(HBG_REG_SGMII_BASE + 0x0020)
+#define HBG_REG_FD_FC_ADDR_HIGH_ADDR		(HBG_REG_SGMII_BASE + 0x0024)
 #define HBG_REG_DUPLEX_B			BIT(0)
 #define HBG_REG_MAX_FRAME_SIZE_ADDR		(HBG_REG_SGMII_BASE + 0x003C)
 #define HBG_REG_PORT_MODE_ADDR			(HBG_REG_SGMII_BASE + 0x0040)
@@ -44,22 +50,40 @@
 #define HBG_REG_PORT_ENABLE_ADDR		(HBG_REG_SGMII_BASE + 0x0044)
 #define HBG_REG_PORT_ENABLE_RX_B		BIT(1)
 #define HBG_REG_PORT_ENABLE_TX_B		BIT(2)
+#define HBG_REG_PAUSE_ENABLE_ADDR		(HBG_REG_SGMII_BASE + 0x0048)
+#define HBG_REG_AN_NEG_STATE_ADDR		(HBG_REG_SGMII_BASE + 0x0058)
 #define HBG_REG_TRANSMIT_CTRL_ADDR		(HBG_REG_SGMII_BASE + 0x0060)
 #define HBG_REG_TRANSMIT_CTRL_PAD_EN_B		BIT(7)
 #define HBG_REG_TRANSMIT_CTRL_CRC_ADD_B		BIT(6)
 #define HBG_REG_TRANSMIT_CTRL_AN_EN_B		BIT(5)
 #define HBG_REG_REC_FILT_CTRL_ADDR		(HBG_REG_SGMII_BASE + 0x0064)
 #define HBG_REG_REC_FILT_CTRL_UC_MATCH_EN_B	BIT(0)
+#define HBG_REG_LINE_LOOP_BACK_ADDR		(HBG_REG_SGMII_BASE + 0x01A8)
 #define HBG_REG_CF_CRC_STRIP_ADDR		(HBG_REG_SGMII_BASE + 0x01B0)
 #define HBG_REG_CF_CRC_STRIP_B			BIT(0)
 #define HBG_REG_MODE_CHANGE_EN_ADDR		(HBG_REG_SGMII_BASE + 0x01B4)
 #define HBG_REG_MODE_CHANGE_EN_B		BIT(0)
+#define HBG_REG_LOOP_REG_ADDR			(HBG_REG_SGMII_BASE + 0x01DC)
 #define HBG_REG_RECV_CTRL_ADDR			(HBG_REG_SGMII_BASE + 0x01E0)
 #define HBG_REG_RECV_CTRL_STRIP_PAD_EN_B	BIT(3)
+#define HBG_REG_VLAN_CODE_ADDR			(HBG_REG_SGMII_BASE + 0x01E8)
+#define HBG_REG_STATION_ADDR_LOW_0_ADDR		(HBG_REG_SGMII_BASE + 0x0200)
+#define HBG_REG_STATION_ADDR_HIGH_0_ADDR	(HBG_REG_SGMII_BASE + 0x0204)
+#define HBG_REG_STATION_ADDR_LOW_1_ADDR		(HBG_REG_SGMII_BASE + 0x0208)
+#define HBG_REG_STATION_ADDR_HIGH_1_ADDR	(HBG_REG_SGMII_BASE + 0x020C)
 #define HBG_REG_STATION_ADDR_LOW_2_ADDR		(HBG_REG_SGMII_BASE + 0x0210)
 #define HBG_REG_STATION_ADDR_HIGH_2_ADDR	(HBG_REG_SGMII_BASE + 0x0214)
+#define HBG_REG_STATION_ADDR_LOW_3_ADDR		(HBG_REG_SGMII_BASE + 0x0218)
+#define HBG_REG_STATION_ADDR_HIGH_3_ADDR	(HBG_REG_SGMII_BASE + 0x021C)
+#define HBG_REG_STATION_ADDR_LOW_4_ADDR		(HBG_REG_SGMII_BASE + 0x0220)
+#define HBG_REG_STATION_ADDR_HIGH_4_ADDR	(HBG_REG_SGMII_BASE + 0x0224)
+#define HBG_REG_STATION_ADDR_LOW_5_ADDR		(HBG_REG_SGMII_BASE + 0x0228)
+#define HBG_REG_STATION_ADDR_HIGH_5_ADDR	(HBG_REG_SGMII_BASE + 0x022C)
 
 /* PCU */
+#define HBG_REG_TX_FIFO_THRSLD_ADDR		(HBG_REG_SGMII_BASE + 0x0420)
+#define HBG_REG_RX_FIFO_THRSLD_ADDR		(HBG_REG_SGMII_BASE + 0x0424)
+#define HBG_REG_CFG_FIFO_THRSLD_ADDR		(HBG_REG_SGMII_BASE + 0x0428)
 #define HBG_REG_CF_INTRPT_MSK_ADDR		(HBG_REG_SGMII_BASE + 0x042C)
 #define HBG_INT_MSK_WE_ERR_B			BIT(31)
 #define HBG_INT_MSK_RBREQ_ERR_B			BIT(30)
@@ -81,11 +105,17 @@
 #define HBG_INT_MSK_RX_B			BIT(0) /* just used in driver */
 #define HBG_REG_CF_INTRPT_STAT_ADDR		(HBG_REG_SGMII_BASE + 0x0434)
 #define HBG_REG_CF_INTRPT_CLR_ADDR		(HBG_REG_SGMII_BASE + 0x0438)
+#define HBG_REG_TX_BUS_ERR_ADDR_ADDR		(HBG_REG_SGMII_BASE + 0x043C)
+#define HBG_REG_RX_BUS_ERR_ADDR_ADDR		(HBG_REG_SGMII_BASE + 0x0440)
 #define HBG_REG_MAX_FRAME_LEN_ADDR		(HBG_REG_SGMII_BASE + 0x0444)
 #define HBG_REG_MAX_FRAME_LEN_M			GENMASK(15, 0)
+#define HBG_REG_DEBUG_ST_MCH_ADDR		(HBG_REG_SGMII_BASE + 0x0450)
+#define HBG_REG_FIFO_CURR_STATUS_ADDR		(HBG_REG_SGMII_BASE + 0x0454)
+#define HBG_REG_FIFO_HIST_STATUS_ADDR		(HBG_REG_SGMII_BASE + 0x0458)
 #define HBG_REG_CF_CFF_DATA_NUM_ADDR		(HBG_REG_SGMII_BASE + 0x045C)
 #define HBG_REG_CF_CFF_DATA_NUM_ADDR_TX_M	GENMASK(8, 0)
 #define HBG_REG_CF_CFF_DATA_NUM_ADDR_RX_M	GENMASK(24, 16)
+#define HBG_REG_CF_TX_PAUSE_ADDR		(HBG_REG_SGMII_BASE + 0x0470)
 #define HBG_REG_TX_CFF_ADDR_0_ADDR		(HBG_REG_SGMII_BASE + 0x0488)
 #define HBG_REG_TX_CFF_ADDR_1_ADDR		(HBG_REG_SGMII_BASE + 0x048C)
 #define HBG_REG_TX_CFF_ADDR_2_ADDR		(HBG_REG_SGMII_BASE + 0x0490)
@@ -104,6 +134,10 @@
 #define HBG_REG_RX_CTRL_RXBUF_1ST_SKIP_SIZE2_M	GENMASK(3, 0)
 #define HBG_REG_RX_PKT_MODE_ADDR		(HBG_REG_SGMII_BASE + 0x04F4)
 #define HBG_REG_RX_PKT_MODE_PARSE_MODE_M	GENMASK(22, 21)
+#define HBG_REG_DBG_ST0_ADDR			(HBG_REG_SGMII_BASE + 0x05E4)
+#define HBG_REG_DBG_ST1_ADDR			(HBG_REG_SGMII_BASE + 0x05E8)
+#define HBG_REG_DBG_ST2_ADDR			(HBG_REG_SGMII_BASE + 0x05EC)
+#define HBG_REG_BUS_RST_EN_ADDR			(HBG_REG_SGMII_BASE + 0x0688)
 #define HBG_REG_CF_IND_TXINT_MSK_ADDR		(HBG_REG_SGMII_BASE + 0x0694)
 #define HBG_REG_IND_INTR_MASK_B			BIT(0)
 #define HBG_REG_CF_IND_TXINT_STAT_ADDR		(HBG_REG_SGMII_BASE + 0x0698)
-- 
2.33.0

[PATCH V3 net-next 5/7] net: hibmcge: Add pauseparam supported in this module

[Jijie Shao]

The MAC can automatically send or respond to pause frames.
This patch supports the function of enabling pause frames
by using ethtool.

Pause auto-negotiation is not supported currently.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
 .../ethernet/hisilicon/hibmcge/hbg_ethtool.c  | 22 +++++++++++++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.c   | 21 ++++++++++++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.h   |  3 +++
 .../net/ethernet/hisilicon/hibmcge/hbg_main.c |  1 +
 .../net/ethernet/hisilicon/hibmcge/hbg_reg.h  |  2 ++
 5 files changed, 49 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
index e7f169d2abb7..edad07826b94 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
@@ -143,12 +143,34 @@ static void hbg_ethtool_get_regs(struct net_device *netdev,
 	}
 }
 
+static void hbg_ethtool_get_pauseparam(struct net_device *net_dev,
+				       struct ethtool_pauseparam *param)
+{
+	struct hbg_priv *priv = netdev_priv(net_dev);
+
+	hbg_hw_get_pause_enable(priv, &param->tx_pause, &param->rx_pause);
+}
+
+static int hbg_ethtool_set_pauseparam(struct net_device *net_dev,
+				      struct ethtool_pauseparam *param)
+{
+	struct hbg_priv *priv = netdev_priv(net_dev);
+
+	if (param->autoneg)
+		return -EOPNOTSUPP;
+
+	hbg_hw_set_pause_enable(priv, !!param->tx_pause, !!param->rx_pause);
+	return 0;
+}
+
 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,
 	.get_regs_len		= hbg_ethtool_get_regs_len,
 	.get_regs		= hbg_ethtool_get_regs,
+	.get_pauseparam         = hbg_ethtool_get_pauseparam,
+	.set_pauseparam         = hbg_ethtool_set_pauseparam,
 };
 
 void hbg_ethtool_set_ops(struct net_device *netdev)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
index 29d66a0ea0a6..0cbe9f7229b3 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
@@ -220,6 +220,27 @@ void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable)
 			    HBG_REG_REC_FILT_CTRL_UC_MATCH_EN_B, enable);
 }
 
+void hbg_hw_set_pause_enable(struct hbg_priv *priv, u32 tx_en, u32 rx_en)
+{
+	hbg_reg_write_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+			    HBG_REG_PAUSE_ENABLE_TX_B, tx_en);
+	hbg_reg_write_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+			    HBG_REG_PAUSE_ENABLE_RX_B, rx_en);
+}
+
+void hbg_hw_get_pause_enable(struct hbg_priv *priv, u32 *tx_en, u32 *rx_en)
+{
+	*tx_en = hbg_reg_read_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+				    HBG_REG_PAUSE_ENABLE_TX_B);
+	*rx_en = hbg_reg_read_field(priv, HBG_REG_PAUSE_ENABLE_ADDR,
+				    HBG_REG_PAUSE_ENABLE_RX_B);
+}
+
+void hbg_hw_set_rx_pause_mac_addr(struct hbg_priv *priv, u64 mac_addr)
+{
+	hbg_reg_write64(priv, HBG_REG_FD_FC_ADDR_LOW_ADDR, mac_addr);
+}
+
 static void hbg_hw_init_transmit_ctrl(struct hbg_priv *priv)
 {
 	u32 ctrl = 0;
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
index 6eb4b7d2cba8..a4a049b5121d 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.h
@@ -56,5 +56,8 @@ u32 hbg_hw_get_fifo_used_num(struct hbg_priv *priv, enum hbg_dir dir);
 void hbg_hw_set_tx_desc(struct hbg_priv *priv, struct hbg_tx_desc *tx_desc);
 void hbg_hw_fill_buffer(struct hbg_priv *priv, u32 buffer_dma_addr);
 void hbg_hw_set_mac_filter_enable(struct hbg_priv *priv, u32 enable);
+void hbg_hw_set_pause_enable(struct hbg_priv *priv, u32 tx_en, u32 rx_en);
+void hbg_hw_get_pause_enable(struct hbg_priv *priv, u32 *tx_en, u32 *rx_en);
+void hbg_hw_set_rx_pause_mac_addr(struct hbg_priv *priv, u64 mac_addr);
 
 #endif
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
index 0ad03681b706..a45a63856e61 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
@@ -204,6 +204,7 @@ static int hbg_net_set_mac_address(struct net_device *netdev, void *addr)
 	if (is_exists)
 		hbg_set_mac_to_mac_table(priv, index, NULL);
 
+	hbg_hw_set_rx_pause_mac_addr(priv, ether_addr_to_u64(mac_addr));
 	dev_addr_set(netdev, mac_addr);
 	return 0;
 }
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
index 665666712c7c..f12efc12f3c5 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_reg.h
@@ -51,6 +51,8 @@
 #define HBG_REG_PORT_ENABLE_RX_B		BIT(1)
 #define HBG_REG_PORT_ENABLE_TX_B		BIT(2)
 #define HBG_REG_PAUSE_ENABLE_ADDR		(HBG_REG_SGMII_BASE + 0x0048)
+#define HBG_REG_PAUSE_ENABLE_RX_B		BIT(0)
+#define HBG_REG_PAUSE_ENABLE_TX_B		BIT(1)
 #define HBG_REG_AN_NEG_STATE_ADDR		(HBG_REG_SGMII_BASE + 0x0058)
 #define HBG_REG_TRANSMIT_CTRL_ADDR		(HBG_REG_SGMII_BASE + 0x0060)
 #define HBG_REG_TRANSMIT_CTRL_PAD_EN_B		BIT(7)
-- 
2.33.0

[PATCH V3 net-next 6/7] net: hibmcge: Add reset supported in this module

[Jijie Shao]

Sometimes, if the port doesn't work, we can try to fix it by resetting it.

This patch supports reset triggered by ethtool or FLR of PCIe, For example:
 ethtool --reset eth0 dedicated
 echo 1 > /sys/bus/pci/devices/0000\:83\:00.1/reset

We hope that the reset can be performed only when the port is down,
and the port cannot be up during the reset.
Therefore, the entire reset process is protected by the rtnl lock.
But the ethtool command already holds the rtnl lock in the dev_ethtool().
So, the reset operation is not directly performed in
ethtool_ops.reset() function. Instead, the reset operation
is triggered by a scheduled task.

After the reset is complete, the hardware registers are restored
to their default values. Therefore, some rebuild operations are
required to rewrite the user configuration to the registers.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
 .../net/ethernet/hisilicon/hibmcge/Makefile   |   2 +-
 .../ethernet/hisilicon/hibmcge/hbg_common.h   |  20 +++
 .../ethernet/hisilicon/hibmcge/hbg_debugfs.c  |  23 +++
 .../net/ethernet/hisilicon/hibmcge/hbg_err.c  | 138 ++++++++++++++++++
 .../net/ethernet/hisilicon/hibmcge/hbg_err.h  |  13 ++
 .../ethernet/hisilicon/hibmcge/hbg_ethtool.c  |  15 ++
 .../net/ethernet/hisilicon/hibmcge/hbg_hw.c   |  10 +-
 .../net/ethernet/hisilicon/hibmcge/hbg_main.c |  63 +++++---
 8 files changed, 262 insertions(+), 22 deletions(-)
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c
 create mode 100644 drivers/net/ethernet/hisilicon/hibmcge/hbg_err.h

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/Makefile b/drivers/net/ethernet/hisilicon/hibmcge/Makefile
index 1a0ec2fb8c24..7ea15f9ef849 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/Makefile
+++ b/drivers/net/ethernet/hisilicon/hibmcge/Makefile
@@ -6,4 +6,4 @@
 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 \
-		hbg_debugfs.o
+		hbg_debugfs.o hbg_err.o
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
index e071f77754fe..490a12d32e8c 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_common.h
@@ -4,6 +4,7 @@
 #ifndef __HBG_COMMON_H
 #define __HBG_COMMON_H
 
+#include <linux/ethtool.h>
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include "hbg_reg.h"
@@ -33,6 +34,15 @@ enum hbg_tx_state {
 
 enum hbg_nic_state {
 	HBG_NIC_STATE_EVENT_HANDLING = 0,
+	HBG_NIC_STATE_NEED_RESET,
+	HBG_NIC_STATE_RESETTING,
+	HBG_NIC_STATE_RESET_FAIL,
+};
+
+enum hbg_reset_type {
+	HBG_RESET_TYPE_NONE = 0,
+	HBG_RESET_TYPE_FLR,
+	HBG_RESET_TYPE_FUNCTION,
 };
 
 struct hbg_buffer {
@@ -128,6 +138,11 @@ struct hbg_mac_filter {
 	bool enabled;
 };
 
+/* saved for restore after rest */
+struct hbg_user_def {
+	struct ethtool_pauseparam pause_param;
+};
+
 struct hbg_priv {
 	struct net_device *netdev;
 	struct pci_dev *pdev;
@@ -139,6 +154,11 @@ struct hbg_priv {
 	struct hbg_ring tx_ring;
 	struct hbg_ring rx_ring;
 	struct hbg_mac_filter filter;
+	struct delayed_work service_task;
+	struct hbg_user_def user_def;
+	enum hbg_reset_type reset_type;
 };
 
+void hbg_reset_task_schedule(struct hbg_priv *priv);
+
 #endif
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
index 2f9d30a51f62..1284d1d431c3 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c
@@ -19,6 +19,7 @@ struct hbg_dbg_info {
 };
 
 #define hbg_get_bool_str(state) ((state) ? "true" : "false")
+#define hbg_get_state_str(p, s) hbg_get_bool_str(test_bit(s, &(p)->state))
 
 static void hbg_dbg_ring(struct hbg_priv *priv, struct hbg_ring *ring,
 			 struct seq_file *s)
@@ -101,11 +102,33 @@ static int hbg_dbg_mac_table(struct seq_file *s, void *unused)
 	return 0;
 }
 
+static const char * const reset_type_str[] = {"None", "FLR", "Function"};
+
+static int hbg_dbg_nic_state(struct seq_file *s, void *unused)
+{
+	struct net_device *netdev = dev_get_drvdata(s->private);
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	seq_printf(s, "event handling state: %s\n",
+		   hbg_get_state_str(priv, HBG_NIC_STATE_EVENT_HANDLING));
+	seq_printf(s, "need reset state: %s\n",
+		   hbg_get_state_str(priv, HBG_NIC_STATE_NEED_RESET));
+	seq_printf(s, "resetting state: %s\n",
+		   hbg_get_state_str(priv, HBG_NIC_STATE_RESETTING));
+	seq_printf(s, "reset fail state: %s\n",
+		   hbg_get_state_str(priv, HBG_NIC_STATE_RESET_FAIL));
+	seq_printf(s, "last reset type: %s\n",
+		   reset_type_str[priv->reset_type]);
+
+	return 0;
+}
+
 static const struct hbg_dbg_info hbg_dbg_infos[] = {
 	{ "tx_ring", hbg_dbg_tx_ring },
 	{ "rx_ring", hbg_dbg_rx_ring },
 	{ "irq_info", hbg_dbg_irq_info },
 	{ "mac_talbe", hbg_dbg_mac_table },
+	{ "nic_state", hbg_dbg_nic_state },
 };
 
 static void hbg_debugfs_uninit(void *data)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c
new file mode 100644
index 000000000000..fd12a396baf0
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_err.c
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <linux/rtnetlink.h>
+#include "hbg_common.h"
+#include "hbg_err.h"
+#include "hbg_hw.h"
+
+static void hbg_restore_mac_table(struct hbg_priv *priv)
+{
+	struct hbg_mac_filter *filter = &priv->filter;
+	u64 addr;
+	u32 i;
+
+	for (i = 0; i < filter->table_max_len; i++)
+		if (!is_zero_ether_addr(filter->mac_table[i].addr)) {
+			addr = ether_addr_to_u64(filter->mac_table[i].addr);
+			hbg_hw_set_uc_addr(priv, addr, i);
+		}
+
+	hbg_hw_set_mac_filter_enable(priv, priv->filter.enabled);
+}
+
+static void hbg_restore_user_def_settings(struct hbg_priv *priv)
+{
+	struct ethtool_pauseparam *pause_param = &priv->user_def.pause_param;
+
+	hbg_restore_mac_table(priv);
+
+	hbg_hw_set_mtu(priv, priv->netdev->mtu);
+	hbg_hw_set_pause_enable(priv, !!pause_param->tx_pause,
+				!!pause_param->rx_pause);
+}
+
+int hbg_rebuild(struct hbg_priv *priv)
+{
+	int ret;
+
+	ret = hbg_hw_init(priv);
+	if (ret)
+		return ret;
+
+	hbg_restore_user_def_settings(priv);
+	return 0;
+}
+
+static int hbg_reset_prepare(struct hbg_priv *priv, enum hbg_reset_type type)
+{
+	int ret = -EBUSY;
+
+	rtnl_lock();
+
+	set_bit(HBG_NIC_STATE_RESETTING, &priv->state);
+
+	if (netif_running(priv->netdev)) {
+		dev_warn(&priv->pdev->dev,
+			 "failed to reset because port is up\n");
+		goto unlock;
+	}
+
+	priv->reset_type = type;
+	ret = hbg_hw_event_notify(priv, HBG_HW_EVENT_RESET);
+	if (!ret)
+		return 0;
+
+	set_bit(HBG_NIC_STATE_RESET_FAIL, &priv->state);
+
+unlock:
+	clear_bit(HBG_NIC_STATE_RESETTING, &priv->state);
+	rtnl_unlock();
+	return ret;
+}
+
+static int hbg_reset_done(struct hbg_priv *priv, enum hbg_reset_type type)
+{
+	int ret;
+
+	if (!test_bit(HBG_NIC_STATE_RESETTING, &priv->state) ||
+	    type != priv->reset_type)
+		return 0;
+
+	ASSERT_RTNL();
+
+	ret = hbg_rebuild(priv);
+	if (ret) {
+		set_bit(HBG_NIC_STATE_RESET_FAIL, &priv->state);
+		dev_err(&priv->pdev->dev, "failed to rebuild after reset\n");
+		goto unlock;
+	}
+
+	clear_bit(HBG_NIC_STATE_RESET_FAIL, &priv->state);
+	dev_info(&priv->pdev->dev, "reset done\n");
+
+unlock:
+	clear_bit(HBG_NIC_STATE_RESETTING, &priv->state);
+	rtnl_unlock();
+	return ret;
+}
+
+int hbg_reset(struct hbg_priv *priv)
+{
+	int ret;
+
+	ret = hbg_reset_prepare(priv, HBG_RESET_TYPE_FUNCTION);
+	if (ret)
+		return ret;
+
+	return hbg_reset_done(priv, HBG_RESET_TYPE_FUNCTION);
+}
+
+static void hbg_pci_err_reset_prepare(struct pci_dev *pdev)
+{
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	hbg_reset_prepare(priv, HBG_RESET_TYPE_FLR);
+}
+
+static void hbg_pci_err_reset_done(struct pci_dev *pdev)
+{
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	hbg_reset_done(priv, HBG_RESET_TYPE_FLR);
+}
+
+static const struct pci_error_handlers hbg_pci_err_handler = {
+	.reset_prepare = hbg_pci_err_reset_prepare,
+	.reset_done = hbg_pci_err_reset_done,
+};
+
+void hbg_set_pci_err_handler(struct pci_driver *pdrv)
+{
+	pdrv->err_handler = &hbg_pci_err_handler;
+}
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_err.h b/drivers/net/ethernet/hisilicon/hibmcge/hbg_err.h
new file mode 100644
index 000000000000..d7828e446308
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_err.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef __HBG_ERR_H
+#define __HBG_ERR_H
+
+#include <linux/pci.h>
+
+void hbg_set_pci_err_handler(struct pci_driver *pdrv);
+int hbg_reset(struct hbg_priv *priv);
+int hbg_rebuild(struct hbg_priv *priv);
+
+#endif
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
index edad07826b94..14df8fb5cd91 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
@@ -4,6 +4,7 @@
 #include <linux/ethtool.h>
 #include <linux/phy.h>
 #include "hbg_common.h"
+#include "hbg_err.h"
 #include "hbg_ethtool.h"
 #include "hbg_hw.h"
 
@@ -160,6 +161,19 @@ static int hbg_ethtool_set_pauseparam(struct net_device *net_dev,
 		return -EOPNOTSUPP;
 
 	hbg_hw_set_pause_enable(priv, !!param->tx_pause, !!param->rx_pause);
+	priv->user_def.pause_param = *param;
+	return 0;
+}
+
+static int hbg_ethtool_reset(struct net_device *netdev, u32 *flags)
+{
+	struct hbg_priv *priv = netdev_priv(netdev);
+
+	if (*flags != ETH_RESET_DEDICATED)
+		return -EOPNOTSUPP;
+
+	hbg_reset_task_schedule(priv);
+	*flags = 0;
 	return 0;
 }
 
@@ -171,6 +185,7 @@ static const struct ethtool_ops hbg_ethtool_ops = {
 	.get_regs		= hbg_ethtool_get_regs,
 	.get_pauseparam         = hbg_ethtool_get_pauseparam,
 	.set_pauseparam         = hbg_ethtool_set_pauseparam,
+	.reset			= hbg_ethtool_reset,
 };
 
 void hbg_ethtool_set_ops(struct net_device *netdev)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
index 0cbe9f7229b3..e7798f213645 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_hw.c
@@ -3,6 +3,7 @@
 
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
+#include <linux/if_vlan.h>
 #include <linux/iopoll.h>
 #include <linux/minmax.h>
 #include "hbg_common.h"
@@ -167,8 +168,13 @@ static void hbg_hw_set_mac_max_frame_len(struct hbg_priv *priv,
 
 void hbg_hw_set_mtu(struct hbg_priv *priv, u16 mtu)
 {
-	hbg_hw_set_pcu_max_frame_len(priv, mtu);
-	hbg_hw_set_mac_max_frame_len(priv, mtu);
+	u32 frame_len;
+
+	frame_len = mtu + VLAN_HLEN * priv->dev_specs.vlan_layers +
+		    ETH_HLEN + ETH_FCS_LEN;
+
+	hbg_hw_set_pcu_max_frame_len(priv, frame_len);
+	hbg_hw_set_mac_max_frame_len(priv, frame_len);
 }
 
 void hbg_hw_mac_enable(struct hbg_priv *priv, u32 enable)
diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
index a45a63856e61..5e5e5caab74c 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c
@@ -6,6 +6,7 @@
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include "hbg_common.h"
+#include "hbg_err.h"
 #include "hbg_ethtool.h"
 #include "hbg_hw.h"
 #include "hbg_irq.h"
@@ -13,8 +14,6 @@
 #include "hbg_txrx.h"
 #include "hbg_debugfs.h"
 
-static void hbg_change_mtu(struct hbg_priv *priv, int new_mtu);
-
 static void hbg_all_irq_enable(struct hbg_priv *priv, bool enabled)
 {
 	struct hbg_irq_info *info;
@@ -56,11 +55,7 @@ static int hbg_hw_txrx_clear(struct hbg_priv *priv)
 		return ret;
 
 	/* After reset, regs need to be reconfigured */
-	hbg_hw_init(priv);
-	hbg_hw_set_uc_addr(priv, ether_addr_to_u64(priv->netdev->dev_addr), 0);
-	hbg_change_mtu(priv, priv->netdev->mtu);
-
-	return 0;
+	return hbg_rebuild(priv);
 }
 
 static int hbg_net_stop(struct net_device *netdev)
@@ -209,15 +204,6 @@ static int hbg_net_set_mac_address(struct net_device *netdev, void *addr)
 	return 0;
 }
 
-static void hbg_change_mtu(struct hbg_priv *priv, int new_mtu)
-{
-	u32 frame_len;
-
-	frame_len = new_mtu + VLAN_HLEN * priv->dev_specs.vlan_layers +
-		    ETH_HLEN + ETH_FCS_LEN;
-	hbg_hw_set_mtu(priv, frame_len);
-}
-
 static int hbg_net_change_mtu(struct net_device *netdev, int new_mtu)
 {
 	struct hbg_priv *priv = netdev_priv(netdev);
@@ -225,7 +211,7 @@ static int hbg_net_change_mtu(struct net_device *netdev, int new_mtu)
 	if (netif_running(netdev))
 		return -EBUSY;
 
-	hbg_change_mtu(priv, new_mtu);
+	hbg_hw_set_mtu(priv, new_mtu);
 	WRITE_ONCE(netdev->mtu, new_mtu);
 
 	dev_dbg(&priv->pdev->dev,
@@ -283,6 +269,41 @@ static int hbg_mac_filter_init(struct hbg_priv *priv)
 	return 0;
 }
 
+void hbg_reset_task_schedule(struct hbg_priv *priv)
+{
+	set_bit(HBG_NIC_STATE_NEED_RESET, &priv->state);
+
+	schedule_delayed_work(&priv->service_task, 0);
+}
+
+static void hbg_service_task(struct work_struct *work)
+{
+	struct hbg_priv *priv = container_of(work, struct hbg_priv,
+					     service_task.work);
+
+	if (test_and_clear_bit(HBG_NIC_STATE_NEED_RESET, &priv->state))
+		hbg_reset(priv);
+}
+
+static void hbg_delaywork_init(struct hbg_priv *priv)
+{
+	INIT_DELAYED_WORK(&priv->service_task, hbg_service_task);
+	schedule_delayed_work(&priv->service_task, 0);
+}
+
+static void hbg_delaywork_uninit(void *data)
+{
+	cancel_delayed_work_sync(data);
+}
+
+static void hbg_init_user_def(struct hbg_priv *priv)
+{
+	struct ethtool_pauseparam *pause_param = &priv->user_def.pause_param;
+
+	hbg_hw_get_pause_enable(priv, &pause_param->tx_pause,
+				&pause_param->rx_pause);
+}
+
 static int hbg_init(struct hbg_priv *priv)
 {
 	int ret;
@@ -308,7 +329,10 @@ static int hbg_init(struct hbg_priv *priv)
 		return ret;
 
 	hbg_debugfs_init(priv);
-	return 0;
+	hbg_init_user_def(priv);
+	hbg_delaywork_init(priv);
+	return devm_add_action_or_reset(&priv->pdev->dev, hbg_delaywork_uninit,
+					&priv->service_task);
 }
 
 static int hbg_pci_init(struct pci_dev *pdev)
@@ -372,7 +396,7 @@ static int hbg_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	netdev->netdev_ops = &hbg_netdev_ops;
 	netdev->watchdog_timeo = 5 * HZ;
 
-	hbg_change_mtu(priv, ETH_DATA_LEN);
+	hbg_hw_set_mtu(priv, ETH_DATA_LEN);
 	hbg_net_set_mac_address(priv->netdev, &priv->dev_specs.mac_addr);
 	hbg_ethtool_set_ops(netdev);
 
@@ -401,6 +425,7 @@ static int __init hbg_module_init(void)
 	int ret;
 
 	hbg_debugfs_register();
+	hbg_set_pci_err_handler(&hbg_driver);
 	ret = pci_register_driver(&hbg_driver);
 	if (ret)
 		hbg_debugfs_unregister();
-- 
2.33.0

[PATCH V3 net-next 7/7] net: hibmcge: Add nway_reset supported in this module

[Jijie Shao]

Add nway_reset supported in this module

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
---
 drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
index 14df8fb5cd91..5e89f4218e5f 100644
--- a/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hibmcge/hbg_ethtool.c
@@ -186,6 +186,7 @@ static const struct ethtool_ops hbg_ethtool_ops = {
 	.get_pauseparam         = hbg_ethtool_get_pauseparam,
 	.set_pauseparam         = hbg_ethtool_set_pauseparam,
 	.reset			= hbg_ethtool_reset,
+	.nway_reset		= phy_ethtool_nway_reset,
 };
 
 void hbg_ethtool_set_ops(struct net_device *netdev)
-- 
2.33.0

Re: [PATCH V3 net-next 5/7] net: hibmcge: Add pauseparam supported in this module

[Andrew Lunn]

On Mon, Nov 11, 2024 at 10:55:56PM +0800, Jijie Shao wrote:
> The MAC can automatically send or respond to pause frames.
> This patch supports the function of enabling pause frames
> by using ethtool.
> 
> Pause auto-negotiation is not supported currently.

What is actually missing to support auto-neg pause? You are using
phylib, so it will do most of the work. You just need your adjust_link
callback to configure the hardware to the result of the negotiation.
And call phy_support_asym_pause() to let phylib know what the MAC
supports.

	Andrew

Re: [PATCH V3 net-next 5/7] net: hibmcge: Add pauseparam supported in this module

[Jijie Shao]

on 2024/11/12 1:58, Andrew Lunn wrote:
> On Mon, Nov 11, 2024 at 10:55:56PM +0800, Jijie Shao wrote:
>> The MAC can automatically send or respond to pause frames.
>> This patch supports the function of enabling pause frames
>> by using ethtool.
>>
>> Pause auto-negotiation is not supported currently.
> What is actually missing to support auto-neg pause? You are using
> phylib, so it will do most of the work. You just need your adjust_link
> callback to configure the hardware to the result of the negotiation.
> And call phy_support_asym_pause() to let phylib know what the MAC
> supports.
>
> 	Andrew

Thanks for your guidance,

I haven't really figured out the difference between phy_support_sym_pause()
and phy_support_asym_paus(). However, according to your guidance
and referring to the phylib interface and other drivers code,
I implemented the auto-neg pause function:


+static void hbg_ethtool_get_pauseparam(struct net_device *net_dev,
+				       struct ethtool_pauseparam *param)
+{
+	struct hbg_priv *priv = netdev_priv(net_dev);
+
+	param->autoneg = priv->mac.pause_autoneg;
+	hbg_hw_get_pause_enable(priv, &param->tx_pause, &param->rx_pause);
+}
+
+static int hbg_ethtool_set_pauseparam(struct net_device *net_dev,
+				      struct ethtool_pauseparam *param)
+{
+	struct hbg_priv *priv = netdev_priv(net_dev);
+	struct phy_device *phydev = priv->mac.phydev;
+
+	phy_set_asym_pause(phydev, param->rx_pause, param->tx_pause);
+
+	priv->mac.pause_autoneg = param->autoneg;
+	if (!param->autoneg)
+		hbg_hw_set_pause_enable(priv, param->tx_pause, param->rx_pause);
+
+	return 0;
+}

......

+static void hbg_flowctrl_cfg(struct hbg_priv *priv)
+{
+	struct phy_device *phydev = priv->mac.phydev;
+	bool rx_pause;
+	bool tx_pause;
+
+	if (!priv->mac.pause_autoneg)
+		return;
+
+	phy_get_pause(phydev, &tx_pause, &rx_pause);
+	hbg_hw_set_pause_enable(priv, tx_pause, rx_pause);
+}
+
  static void hbg_phy_adjust_link(struct net_device *netdev)
  {
  	struct hbg_priv *priv = netdev_priv(netdev);
@@ -140,6 +153,7 @@ static void hbg_phy_adjust_link(struct net_device *netdev)
  			priv->mac.duplex = phydev->duplex;
  			priv->mac.autoneg = phydev->autoneg;
  			hbg_hw_adjust_link(priv, speed, phydev->duplex);
+			hbg_flowctrl_cfg(priv);
  		}
  
  		priv->mac.link_status = phydev->link;
@@ -168,6 +182,7 @@ static int hbg_phy_connect(struct hbg_priv *priv)
  		return ret;
  
  	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+	phy_support_asym_pause(phydev);
  	phy_attached_info(phydev);
  
  	return 0;

......

Can the auto-neg pause function be fully supported?
If the code is ok, I'll add it in the next version.

Thanks,
Jijie Shao

Re: [PATCH V3 net-next 5/7] net: hibmcge: Add pauseparam supported in this module

[Andrew Lunn]

On Tue, Nov 12, 2024 at 10:37:27PM +0800, Jijie Shao wrote:
> 
> on 2024/11/12 1:58, Andrew Lunn wrote:
> > On Mon, Nov 11, 2024 at 10:55:56PM +0800, Jijie Shao wrote:
> > > The MAC can automatically send or respond to pause frames.
> > > This patch supports the function of enabling pause frames
> > > by using ethtool.
> > > 
> > > Pause auto-negotiation is not supported currently.
> > What is actually missing to support auto-neg pause? You are using
> > phylib, so it will do most of the work. You just need your adjust_link
> > callback to configure the hardware to the result of the negotiation.
> > And call phy_support_asym_pause() to let phylib know what the MAC
> > supports.
> > 
> > 	Andrew
> 
> Thanks for your guidance,
> 
> I haven't really figured out the difference between phy_support_sym_pause()
> and phy_support_asym_paus().

sym_pause means that when the MAC pauses, it does it in both
directions, receive and transmit. Asymmetric pause means it can pause
just receive, or just transmit.

Since you have both tx_pause and rx_pause, you can do both.

> +static void hbg_ethtool_get_pauseparam(struct net_device *net_dev,
> +				       struct ethtool_pauseparam *param)
> +{
> +	struct hbg_priv *priv = netdev_priv(net_dev);
> +
> +	param->autoneg = priv->mac.pause_autoneg;
> +	hbg_hw_get_pause_enable(priv, &param->tx_pause, &param->rx_pause);
> +}
> +
> +static int hbg_ethtool_set_pauseparam(struct net_device *net_dev,
> +				      struct ethtool_pauseparam *param)
> +{
> +	struct hbg_priv *priv = netdev_priv(net_dev);
> +	struct phy_device *phydev = priv->mac.phydev;
> +
> +	phy_set_asym_pause(phydev, param->rx_pause, param->tx_pause);

Not needed. This just tells phylib what the MAC is capable of. The
capabilities does not change, so telling it once in hbg_phy_connect()
is sufficient.

	Andrew

Re: [PATCH V3 net-next 5/7] net: hibmcge: Add pauseparam supported in this module

[Jijie Shao]

on 2024/11/13 0:32, Andrew Lunn wrote:
> On Tue, Nov 12, 2024 at 10:37:27PM +0800, Jijie Shao wrote:
>> on 2024/11/12 1:58, Andrew Lunn wrote:
>>> On Mon, Nov 11, 2024 at 10:55:56PM +0800, Jijie Shao wrote:
>>>> The MAC can automatically send or respond to pause frames.
>>>> This patch supports the function of enabling pause frames
>>>> by using ethtool.
>>>>
>>>> Pause auto-negotiation is not supported currently.
>>> What is actually missing to support auto-neg pause? You are using
>>> phylib, so it will do most of the work. You just need your adjust_link
>>> callback to configure the hardware to the result of the negotiation.
>>> And call phy_support_asym_pause() to let phylib know what the MAC
>>> supports.
>>>
>>> 	Andrew
>> Thanks for your guidance,
>>
>> I haven't really figured out the difference between phy_support_sym_pause()
>> and phy_support_asym_paus().
> sym_pause means that when the MAC pauses, it does it in both
> directions, receive and transmit. Asymmetric pause means it can pause
> just receive, or just transmit.
>
> Since you have both tx_pause and rx_pause, you can do both.
>
>> +static void hbg_ethtool_get_pauseparam(struct net_device *net_dev,
>> +				       struct ethtool_pauseparam *param)
>> +{
>> +	struct hbg_priv *priv = netdev_priv(net_dev);
>> +
>> +	param->autoneg = priv->mac.pause_autoneg;
>> +	hbg_hw_get_pause_enable(priv, &param->tx_pause, &param->rx_pause);
>> +}
>> +
>> +static int hbg_ethtool_set_pauseparam(struct net_device *net_dev,
>> +				      struct ethtool_pauseparam *param)
>> +{
>> +	struct hbg_priv *priv = netdev_priv(net_dev);
>> +	struct phy_device *phydev = priv->mac.phydev;
>> +
>> +	phy_set_asym_pause(phydev, param->rx_pause, param->tx_pause);
> Not needed. This just tells phylib what the MAC is capable of. The
> capabilities does not change, so telling it once in hbg_phy_connect()
> is sufficient.
>
> 	Andrew


Maybe there is an error in this code.
If I want to disable auto-neg pause, do I need to set phy_set_asym_pause(phydev, 0, 0)?

Thanks
Jijie Shao

Re: [PATCH V3 net-next 3/7] net: hibmcge: Add unicast frame filter supported in this module

[Simon Horman]

On Mon, Nov 11, 2024 at 10:55:54PM +0800, Jijie Shao wrote:
> MAC supports filtering unmatched unicast packets according to
> the MAC address table. This patch adds the support for
> unicast frame filtering.
> 
> To support automatic restoration of MAC entries
> after reset, the driver saves a copy of MAC entries in the driver.
> 
> Signed-off-by: Jijie Shao <shaojijie@huawei.com>

...

> diff --git a/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c b/drivers/net/ethernet/hisilicon/hibmcge/hbg_main.c

...

>  static int hbg_net_set_mac_address(struct net_device *netdev, void *addr)
>  {
>  	struct hbg_priv *priv = netdev_priv(netdev);
>  	u8 *mac_addr;
> +	bool is_exists;
> +	u32 index;

nit: If you have to respin for some other reason,
     please arrange these local variables in reverse
     xmas tree order - longest line to shortest.

     Also, from an English language PoV, is_exists is a bit tautological.
     Not that it really matters, but maybe addr_exists would work?

>  
>  	mac_addr = ((struct sockaddr *)addr)->sa_data;
>  
>  	if (!is_valid_ether_addr(mac_addr))
>  		return -EADDRNOTAVAIL;
>  
> -	hbg_hw_set_uc_addr(priv, ether_addr_to_u64(mac_addr));
> -	dev_addr_set(netdev, mac_addr);
> +	/* The index of host mac is always 0.
> +	 * If new mac address already exists,
> +	 * delete the existing mac address and
> +	 * add it to the position with index 0.
> +	 */
> +	is_exists = !hbg_get_index_from_mac_table(priv, mac_addr, &index);
> +	hbg_set_mac_to_mac_table(priv, 0, mac_addr);
> +	if (is_exists)
> +		hbg_set_mac_to_mac_table(priv, index, NULL);
>  
> +	dev_addr_set(netdev, mac_addr);
>  	return 0;
>  }
>  

...

Re: [PATCH V3 net-next 5/7] net: hibmcge: Add pauseparam supported in this module

[Andrew Lunn]

> Maybe there is an error in this code.
> If I want to disable auto-neg pause, do I need to set phy_set_asym_pause(phydev, 0, 0)?

You could. It is not actually clear to me what you should tell the
link peer when you decide to not use pause autoneg. By passing 0, 0,
you are telling the peer you don't support pause, when in fact you do,
and the configuration is hard coded. Not using pause autoneg really
only makes sense when you do it to both peers. And then the
negotiation configuration does not matter.

phylink makes this a lot easier, it hides this all away, leaving the
MAC driver to just program the hardware.

	Andrew