net: hibmcge: Add support for BMC diagnose feature

The MAC hardware is on the BMC side, and the driver is on the host side.
When the driver is abnormal, the BMC cannot directly detect the
exception cause.
Therefore, this patch implements the BMC diagnosis feature.

When users query driver diagnosis information on the BMC, the driver
detects the query request in the scheduled task and reports
driver statistics and link status to the BMC through the bar space.
The BMC collects logs to analyze exception causes.

Currently, the scheduled task is executed every 30 seconds
To quickly respond to user query requests,
this patch changes the scheduled task to once every second.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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_err.o
+		hbg_debugfs.o hbg_err.o hbg_diagnose.o

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

@@ -272,6 +272,7 @@ struct hbg_priv {
 	enum hbg_reset_type reset_type;
 	struct hbg_user_def user_def;
 	struct hbg_stats stats;
+	unsigned long last_update_stats_time;
 	struct delayed_work service_task;
 };
 

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

@@ -0,0 +1,348 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (c) 2025 Hisilicon Limited.
+
+#include <linux/iopoll.h>
+#include <linux/phy.h>
+#include "hbg_common.h"
+#include "hbg_ethtool.h"
+#include "hbg_hw.h"
+#include "hbg_diagnose.h"
+
+#define HBG_MSG_DATA_MAX_NUM	64
+
+struct hbg_diagnose_message {
+	u32 opcode;
+	u32 status;
+	u32 data_num;
+	struct hbg_priv *priv;
+
+	u32 data[HBG_MSG_DATA_MAX_NUM];
+};
+
+#define HBG_HW_PUSH_WAIT_TIMEOUT_US	(2 * 1000 * 1000)
+#define HBG_HW_PUSH_WAIT_INTERVAL_US	(1 * 1000)
+
+enum hbg_push_cmd {
+	HBG_PUSH_CMD_IRQ = 0,
+	HBG_PUSH_CMD_STATS,
+	HBG_PUSH_CMD_LINK,
+};
+
+struct hbg_push_stats_info {
+	/* id is used to match the name of the current stats item.
+	 * and is used for pretty print on BMC
+	 */
+	u32 id;
+	u64 offset;
+};
+
+struct hbg_push_irq_info {
+	/* id is used to match the name of the current irq.
+	 * and is used for pretty print on BMC
+	 */
+	u32 id;
+	u32 mask;
+};
+
+#define HBG_PUSH_IRQ_I(name, id) {id, HBG_INT_MSK_##name##_B}
+static const struct hbg_push_irq_info hbg_push_irq_list[] = {
+	HBG_PUSH_IRQ_I(RX, 0),
+	HBG_PUSH_IRQ_I(TX, 1),
+	HBG_PUSH_IRQ_I(TX_PKT_CPL, 2),
+	HBG_PUSH_IRQ_I(MAC_MII_FIFO_ERR, 3),
+	HBG_PUSH_IRQ_I(MAC_PCS_RX_FIFO_ERR, 4),
+	HBG_PUSH_IRQ_I(MAC_PCS_TX_FIFO_ERR, 5),
+	HBG_PUSH_IRQ_I(MAC_APP_RX_FIFO_ERR, 6),
+	HBG_PUSH_IRQ_I(MAC_APP_TX_FIFO_ERR, 7),
+	HBG_PUSH_IRQ_I(SRAM_PARITY_ERR, 8),
+	HBG_PUSH_IRQ_I(TX_AHB_ERR, 9),
+	HBG_PUSH_IRQ_I(RX_BUF_AVL, 10),
+	HBG_PUSH_IRQ_I(REL_BUF_ERR, 11),
+	HBG_PUSH_IRQ_I(TXCFG_AVL, 12),
+	HBG_PUSH_IRQ_I(TX_DROP, 13),
+	HBG_PUSH_IRQ_I(RX_DROP, 14),
+	HBG_PUSH_IRQ_I(RX_AHB_ERR, 15),
+	HBG_PUSH_IRQ_I(MAC_FIFO_ERR, 16),
+	HBG_PUSH_IRQ_I(RBREQ_ERR, 17),
+	HBG_PUSH_IRQ_I(WE_ERR, 18),
+};
+
+#define HBG_PUSH_STATS_I(name, id) {id, HBG_STATS_FIELD_OFF(name)}
+static const struct hbg_push_stats_info hbg_push_stats_list[] = {
+	HBG_PUSH_STATS_I(rx_desc_drop, 0),
+	HBG_PUSH_STATS_I(rx_desc_l2_err_cnt, 1),
+	HBG_PUSH_STATS_I(rx_desc_pkt_len_err_cnt, 2),
+	HBG_PUSH_STATS_I(rx_desc_l3_wrong_head_cnt, 3),
+	HBG_PUSH_STATS_I(rx_desc_l3_csum_err_cnt, 4),
+	HBG_PUSH_STATS_I(rx_desc_l3_len_err_cnt, 5),
+	HBG_PUSH_STATS_I(rx_desc_l3_zero_ttl_cnt, 6),
+	HBG_PUSH_STATS_I(rx_desc_l3_other_cnt, 7),
+	HBG_PUSH_STATS_I(rx_desc_l4_err_cnt, 8),
+	HBG_PUSH_STATS_I(rx_desc_l4_wrong_head_cnt, 9),
+	HBG_PUSH_STATS_I(rx_desc_l4_len_err_cnt, 10),
+	HBG_PUSH_STATS_I(rx_desc_l4_csum_err_cnt, 11),
+	HBG_PUSH_STATS_I(rx_desc_l4_zero_port_num_cnt, 12),
+	HBG_PUSH_STATS_I(rx_desc_l4_other_cnt, 13),
+	HBG_PUSH_STATS_I(rx_desc_frag_cnt, 14),
+	HBG_PUSH_STATS_I(rx_desc_ip_ver_err_cnt, 15),
+	HBG_PUSH_STATS_I(rx_desc_ipv4_pkt_cnt, 16),
+	HBG_PUSH_STATS_I(rx_desc_ipv6_pkt_cnt, 17),
+	HBG_PUSH_STATS_I(rx_desc_no_ip_pkt_cnt, 18),
+	HBG_PUSH_STATS_I(rx_desc_ip_pkt_cnt, 19),
+	HBG_PUSH_STATS_I(rx_desc_tcp_pkt_cnt, 20),
+	HBG_PUSH_STATS_I(rx_desc_udp_pkt_cnt, 21),
+	HBG_PUSH_STATS_I(rx_desc_vlan_pkt_cnt, 22),
+	HBG_PUSH_STATS_I(rx_desc_icmp_pkt_cnt, 23),
+	HBG_PUSH_STATS_I(rx_desc_arp_pkt_cnt, 24),
+	HBG_PUSH_STATS_I(rx_desc_rarp_pkt_cnt, 25),
+	HBG_PUSH_STATS_I(rx_desc_multicast_pkt_cnt, 26),
+	HBG_PUSH_STATS_I(rx_desc_broadcast_pkt_cnt, 27),
+	HBG_PUSH_STATS_I(rx_desc_ipsec_pkt_cnt, 28),
+	HBG_PUSH_STATS_I(rx_desc_ip_opt_pkt_cnt, 29),
+	HBG_PUSH_STATS_I(rx_desc_key_not_match_cnt, 30),
+	HBG_PUSH_STATS_I(rx_octets_total_ok_cnt, 31),
+	HBG_PUSH_STATS_I(rx_uc_pkt_cnt, 32),
+	HBG_PUSH_STATS_I(rx_mc_pkt_cnt, 33),
+	HBG_PUSH_STATS_I(rx_bc_pkt_cnt, 34),
+	HBG_PUSH_STATS_I(rx_vlan_pkt_cnt, 35),
+	HBG_PUSH_STATS_I(rx_octets_bad_cnt, 36),
+	HBG_PUSH_STATS_I(rx_octets_total_filt_cnt, 37),
+	HBG_PUSH_STATS_I(rx_filt_pkt_cnt, 38),
+	HBG_PUSH_STATS_I(rx_trans_pkt_cnt, 39),
+	HBG_PUSH_STATS_I(rx_framesize_64, 40),
+	HBG_PUSH_STATS_I(rx_framesize_65_127, 41),
+	HBG_PUSH_STATS_I(rx_framesize_128_255, 42),
+	HBG_PUSH_STATS_I(rx_framesize_256_511, 43),
+	HBG_PUSH_STATS_I(rx_framesize_512_1023, 44),
+	HBG_PUSH_STATS_I(rx_framesize_1024_1518, 45),
+	HBG_PUSH_STATS_I(rx_framesize_bt_1518, 46),
+	HBG_PUSH_STATS_I(rx_fcs_error_cnt, 47),
+	HBG_PUSH_STATS_I(rx_data_error_cnt, 48),
+	HBG_PUSH_STATS_I(rx_align_error_cnt, 49),
+	HBG_PUSH_STATS_I(rx_frame_long_err_cnt, 50),
+	HBG_PUSH_STATS_I(rx_jabber_err_cnt, 51),
+	HBG_PUSH_STATS_I(rx_pause_macctl_frame_cnt, 52),
+	HBG_PUSH_STATS_I(rx_unknown_macctl_frame_cnt, 53),
+	HBG_PUSH_STATS_I(rx_frame_very_long_err_cnt, 54),
+	HBG_PUSH_STATS_I(rx_frame_runt_err_cnt, 55),
+	HBG_PUSH_STATS_I(rx_frame_short_err_cnt, 56),
+	HBG_PUSH_STATS_I(rx_overflow_cnt, 57),
+	HBG_PUSH_STATS_I(rx_bufrq_err_cnt, 58),
+	HBG_PUSH_STATS_I(rx_we_err_cnt, 59),
+	HBG_PUSH_STATS_I(rx_overrun_cnt, 60),
+	HBG_PUSH_STATS_I(rx_lengthfield_err_cnt, 61),
+	HBG_PUSH_STATS_I(rx_fail_comma_cnt, 62),
+	HBG_PUSH_STATS_I(rx_dma_err_cnt, 63),
+	HBG_PUSH_STATS_I(rx_fifo_less_empty_thrsld_cnt, 64),
+	HBG_PUSH_STATS_I(tx_octets_total_ok_cnt, 65),
+	HBG_PUSH_STATS_I(tx_uc_pkt_cnt, 66),
+	HBG_PUSH_STATS_I(tx_mc_pkt_cnt, 67),
+	HBG_PUSH_STATS_I(tx_bc_pkt_cnt, 68),
+	HBG_PUSH_STATS_I(tx_vlan_pkt_cnt, 69),
+	HBG_PUSH_STATS_I(tx_octets_bad_cnt, 70),
+	HBG_PUSH_STATS_I(tx_trans_pkt_cnt, 71),
+	HBG_PUSH_STATS_I(tx_pause_frame_cnt, 72),
+	HBG_PUSH_STATS_I(tx_framesize_64, 73),
+	HBG_PUSH_STATS_I(tx_framesize_65_127, 74),
+	HBG_PUSH_STATS_I(tx_framesize_128_255, 75),
+	HBG_PUSH_STATS_I(tx_framesize_256_511, 76),
+	HBG_PUSH_STATS_I(tx_framesize_512_1023, 77),
+	HBG_PUSH_STATS_I(tx_framesize_1024_1518, 78),
+	HBG_PUSH_STATS_I(tx_framesize_bt_1518, 79),
+	HBG_PUSH_STATS_I(tx_underrun_err_cnt, 80),
+	HBG_PUSH_STATS_I(tx_add_cs_fail_cnt, 81),
+	HBG_PUSH_STATS_I(tx_bufrl_err_cnt, 82),
+	HBG_PUSH_STATS_I(tx_crc_err_cnt, 83),
+	HBG_PUSH_STATS_I(tx_drop_cnt, 84),
+	HBG_PUSH_STATS_I(tx_excessive_length_drop_cnt, 85),
+	HBG_PUSH_STATS_I(tx_dma_err_cnt, 86),
+};
+
+static int hbg_push_msg_send(struct hbg_priv *priv,
+			     struct hbg_diagnose_message *msg)
+{
+	u32 header = 0;
+	u32 i;
+
+	if (msg->data_num == 0)
+		return 0;
+
+	for (i = 0; i < msg->data_num && i < HBG_MSG_DATA_MAX_NUM; i++)
+		hbg_reg_write(priv,
+			      HBG_REG_MSG_DATA_BASE_ADDR + i * sizeof(u32),
+			      msg->data[i]);
+
+	hbg_field_modify(header, HBG_REG_MSG_HEADER_OPCODE_M, msg->opcode);
+	hbg_field_modify(header, HBG_REG_MSG_HEADER_DATA_NUM_M,  msg->data_num);
+	hbg_field_modify(header, HBG_REG_MSG_HEADER_RESP_CODE_M, ETIMEDOUT);
+
+	/* start status */
+	hbg_field_modify(header, HBG_REG_MSG_HEADER_STATUS_M, 1);
+
+	/* write header msg to start push */
+	hbg_reg_write(priv, HBG_REG_MSG_HEADER_ADDR, header);
+
+	/* wait done */
+	readl_poll_timeout(priv->io_base + HBG_REG_MSG_HEADER_ADDR, header,
+			   !FIELD_GET(HBG_REG_MSG_HEADER_STATUS_M, header),
+			   HBG_HW_PUSH_WAIT_INTERVAL_US,
+			   HBG_HW_PUSH_WAIT_TIMEOUT_US);
+
+	msg->status = FIELD_GET(HBG_REG_MSG_HEADER_STATUS_M, header);
+	return -(int)FIELD_GET(HBG_REG_MSG_HEADER_RESP_CODE_M, header);
+}
+
+static int hbg_push_data(struct hbg_priv *priv,
+			 u32 opcode, u32 *data, u32 data_num)
+{
+	struct hbg_diagnose_message msg = {0};
+	u32 data_left_num;
+	u32 i, j;
+	int ret;
+
+	msg.priv = priv;
+	msg.opcode = opcode;
+	for (i = 0; i < data_num / HBG_MSG_DATA_MAX_NUM + 1; i++) {
+		if (i * HBG_MSG_DATA_MAX_NUM >= data_num)
+			break;
+
+		data_left_num = data_num - i * HBG_MSG_DATA_MAX_NUM;
+		for (j = 0; j < data_left_num && j < HBG_MSG_DATA_MAX_NUM; j++)
+			msg.data[j] = data[i * HBG_MSG_DATA_MAX_NUM + j];
+
+		msg.data_num = j;
+		ret = hbg_push_msg_send(priv, &msg);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int hbg_push_data_u64(struct hbg_priv *priv, u32 opcode,
+			     u64 *data, u32 data_num)
+{
+	/* The length of u64 is twice that of u32,
+	 * the data_num must be multiplied by 2.
+	 */
+	return hbg_push_data(priv, opcode, (u32 *)data, data_num * 2);
+}
+
+static u64 hbg_get_irq_stats(struct hbg_vector *vectors, u32 mask)
+{
+	u32 i = 0;
+
+	for (i = 0; i < vectors->info_array_len; i++)
+		if (vectors->info_array[i].mask == mask)
+			return vectors->info_array[i].count;
+
+	return 0;
+}
+
+static int hbg_push_irq_cnt(struct hbg_priv *priv)
+{
+	/* An id needs to be added for each data.
+	 * Therefore, the data_num must be multiplied by 2.
+	 */
+	u32 data_num = ARRAY_SIZE(hbg_push_irq_list) * 2;
+	struct hbg_vector *vectors = &priv->vectors;
+	const struct hbg_push_irq_info *info;
+	u32 i, j = 0;
+	u64 *data;
+	int ret;
+
+	data = kcalloc(data_num, sizeof(u64), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	/* An id needs to be added for each data.
+	 * So i + 2 for each loop.
+	 */
+	for (i = 0; i < data_num; i += 2) {
+		info = &hbg_push_irq_list[j++];
+		data[i] = info->id;
+		data[i + 1] = hbg_get_irq_stats(vectors, info->mask);
+	}
+
+	ret = hbg_push_data_u64(priv, HBG_PUSH_CMD_IRQ, data, data_num);
+	kfree(data);
+	return ret;
+}
+
+static int hbg_push_link_status(struct hbg_priv *priv)
+{
+	u32 link_status[2];
+
+	/* phy link status */
+	link_status[0] = priv->mac.phydev->link;
+	/* mac link status */
+	link_status[1] = hbg_reg_read_field(priv, HBG_REG_AN_NEG_STATE_ADDR,
+					    HBG_REG_AN_NEG_STATE_NP_LINK_OK_B);
+
+	return hbg_push_data(priv, HBG_PUSH_CMD_LINK,
+			     link_status, ARRAY_SIZE(link_status));
+}
+
+static int hbg_push_stats(struct hbg_priv *priv)
+{
+	/* An id needs to be added for each data.
+	 * Therefore, the data_num must be multiplied by 2.
+	 */
+	u64 data_num = ARRAY_SIZE(hbg_push_stats_list) * 2;
+	struct hbg_stats *stats = &priv->stats;
+	const struct hbg_push_stats_info *info;
+	u32 i, j = 0;
+	u64 *data;
+	int ret;
+
+	data = kcalloc(data_num, sizeof(u64), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	/* An id needs to be added for each data.
+	 * So i + 2 for each loop.
+	 */
+	for (i = 0; i < data_num; i += 2) {
+		info = &hbg_push_stats_list[j++];
+		data[i] = info->id;
+		data[i + 1] = HBG_STATS_R(stats, info->offset);
+	}
+
+	ret = hbg_push_data_u64(priv, HBG_PUSH_CMD_STATS, data, data_num);
+	kfree(data);
+	return ret;
+}
+
+void hbg_diagnose_message_push(struct hbg_priv *priv)
+{
+	int ret;
+
+	if (test_bit(HBG_NIC_STATE_RESETTING, &priv->state))
+		return;
+
+	/* only 1 is the right value */
+	if (hbg_reg_read(priv, HBG_REG_PUSH_REQ_ADDR) != 1)
+		return;
+
+	ret = hbg_push_irq_cnt(priv);
+	if (ret) {
+		dev_err(&priv->pdev->dev,
+			"failed to push irq cnt, ret = %d\n", ret);
+		goto push_done;
+	}
+
+	ret = hbg_push_link_status(priv);
+	if (ret) {
+		dev_err(&priv->pdev->dev,
+			"failed to push link status, ret = %d\n", ret);
+		goto push_done;
+	}
+
+	ret = hbg_push_stats(priv);
+	if (ret)
+		dev_err(&priv->pdev->dev,
+			"failed to push stats, ret = %d\n", ret);
+
+push_done:
+	hbg_reg_write(priv, HBG_REG_PUSH_REQ_ADDR, 0);
+}

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

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (c) 2025 Hisilicon Limited. */
+
+#ifndef __HBG_DIAGNOSE_H
+#define __HBG_DIAGNOSE_H
+
+#include "hbg_common.h"
+
+void hbg_diagnose_message_push(struct hbg_priv *priv);
+
+#endif