net: hns3: debugfs add dump dscp map info

mainline inclusion
from mainline-v6.0-rc3
commit fddc02eb
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5QIIF
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fddc02eb583a

----------------------------------------------------------------------

This patch add dump the map relation for dscp, priority and TC, and
the current tc map mode.
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NJiantao Xiao <xiaojiantao1@h-partners.com>
Reviewed-by: NJian Shen <shenjian15@huawei.com>
Reviewed-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/net/ethernet/hisilicon/hns3/hnae3.h

@@ -271,6 +271,7 @@ enum hnae3_dbg_cmd {
 	HNAE3_DBG_CMD_TC_SCH_INFO,
 	HNAE3_DBG_CMD_QOS_PAUSE_CFG,
 	HNAE3_DBG_CMD_QOS_PRI_MAP,
+	HNAE3_DBG_CMD_QOS_DSCP_MAP,
 	HNAE3_DBG_CMD_QOS_BUF_CFG,
 	HNAE3_DBG_CMD_DEV_INFO,
 	HNAE3_DBG_CMD_TX_BD,

drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

@@ -105,6 +105,13 @@ static struct hns3_dbg_cmd_info hns3_dbg_cmd[] = {
 		.buf_len = HNS3_DBG_READ_LEN,
 		.init = hns3_dbg_common_file_init,
 	},
+	{
+		.name = "qos_dscp_map",
+		.cmd = HNAE3_DBG_CMD_QOS_DSCP_MAP,
+		.dentry = HNS3_DBG_DENTRY_TM,
+		.buf_len = HNS3_DBG_READ_LEN,
+		.init = hns3_dbg_common_file_init,
+	},
 	{
 		.name = "qos_buf_cfg",
 		.cmd = HNAE3_DBG_CMD_QOS_BUF_CFG,

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c

@@ -14,6 +14,8 @@ static const char * const hclge_mac_state_str[] = {
 	"TO_ADD", "TO_DEL", "ACTIVE"
 };
 
+static const char * const tc_map_mode_str[] = { "PRIO", "DSCP" };
+
 static const struct hclge_dbg_reg_type_info hclge_dbg_reg_info[] = {
 	{ .cmd = HNAE3_DBG_CMD_REG_BIOS_COMMON,
 	  .dfx_msg = &hclge_dbg_bios_common_reg[0],
@@ -1115,10 +1117,11 @@ static int hclge_dbg_dump_qos_pause_cfg(struct hclge_dev *hdev, char *buf,
 	return 0;
 }
 
+#define HCLGE_DBG_TC_MASK		0x0F
+
 static int hclge_dbg_dump_qos_pri_map(struct hclge_dev *hdev, char *buf,
 				      int len)
 {
-#define HCLGE_DBG_TC_MASK		0x0F
 #define HCLGE_DBG_TC_BIT_WIDTH		4
 
 	struct hclge_qos_pri_map_cmd *pri_map;
@@ -1152,6 +1155,57 @@ static int hclge_dbg_dump_qos_pri_map(struct hclge_dev *hdev, char *buf,
 	return 0;
 }
 
+static int hclge_dbg_dump_qos_dscp_map(struct hclge_dev *hdev, char *buf,
+				       int len)
+{
+	struct hclge_desc desc[HCLGE_DSCP_MAP_TC_BD_NUM];
+	u8 *req0 = (u8 *)desc[0].data;
+	u8 *req1 = (u8 *)desc[1].data;
+	u8 dscp_tc[HCLGE_MAX_DSCP];
+	int pos, ret;
+	u8 i, j;
+
+	pos = scnprintf(buf, len, "tc map mode: %s\n",
+			tc_map_mode_str[hdev->vport[0].nic.kinfo.tc_map_mode]);
+
+	if (hdev->vport[0].nic.kinfo.tc_map_mode != HNAE3_TC_MAP_MODE_DSCP)
+		return 0;
+
+	hclge_cmd_setup_basic_desc(&desc[0], HCLGE_OPC_QOS_MAP, true);
+	desc[0].flag |= cpu_to_le16(HCLGE_COMM_CMD_FLAG_NEXT);
+	hclge_cmd_setup_basic_desc(&desc[1], HCLGE_OPC_QOS_MAP, true);
+	ret = hclge_cmd_send(&hdev->hw, desc, HCLGE_DSCP_MAP_TC_BD_NUM);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"failed to dump qos dscp map, ret = %d\n", ret);
+		return ret;
+	}
+
+	pos += scnprintf(buf + pos, len - pos, "\nDSCP  PRIO  TC\n");
+
+	/* The low 32 dscp setting use bd0, high 32 dscp setting use bd1 */
+	for (i = 0; i < HCLGE_MAX_DSCP / HCLGE_DSCP_MAP_TC_BD_NUM; i++) {
+		j = i + HCLGE_MAX_DSCP / HCLGE_DSCP_MAP_TC_BD_NUM;
+		/* Each dscp setting has 4 bits, so each byte saves two dscp
+		 * setting
+		 */
+		dscp_tc[i] = req0[i >> 1] >> HCLGE_DSCP_TC_SHIFT(i);
+		dscp_tc[j] = req1[i >> 1] >> HCLGE_DSCP_TC_SHIFT(i);
+		dscp_tc[i] &= HCLGE_DBG_TC_MASK;
+		dscp_tc[j] &= HCLGE_DBG_TC_MASK;
+	}
+
+	for (i = 0; i < HCLGE_MAX_DSCP; i++) {
+		if (hdev->tm_info.dscp_prio[i] == HCLGE_PRIO_ID_INVALID)
+			continue;
+
+		pos += scnprintf(buf + pos, len - pos, " %2u    %u    %u\n",
+				 i, hdev->tm_info.dscp_prio[i], dscp_tc[i]);
+	}
+
+	return 0;
+}
+
 static int hclge_dbg_dump_tx_buf_cfg(struct hclge_dev *hdev, char *buf, int len)
 {
 	struct hclge_tx_buff_alloc_cmd *tx_buf_cmd;
@@ -2376,6 +2430,10 @@ static const struct hclge_dbg_func hclge_dbg_cmd_func[] = {
 		.cmd = HNAE3_DBG_CMD_QOS_PRI_MAP,
 		.dbg_dump = hclge_dbg_dump_qos_pri_map,
 	},
+	{
+		.cmd = HNAE3_DBG_CMD_QOS_DSCP_MAP,
+		.dbg_dump = hclge_dbg_dump_qos_dscp_map,
+	},
 	{
 		.cmd = HNAE3_DBG_CMD_QOS_BUF_CFG,
 		.dbg_dump = hclge_dbg_dump_qos_buf_cfg,