net: hns3: refactor dump fd tcam of debugfs

Currently, the debugfs command for fd tcam is implemented by
"echo xxxx > cmd", and record the information in dmesg. It's
unnecessary and heavy. To improve it, create a single file
"fd_tcam" for it, and query it by command "cat fd_tcam",
return the result to userspace, rather than record in dmesg.

The display style is below:
$ cat fd_tcam
read result tcam key x(31):
00000000
00000000
00000000
08000000
00000600
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
read result tcam key y(31):
00000000
00000000
00000000
f7ff0000
0000f900
00000000
00000000
00000000
00000000
00000000
00000000
00000000
0000fff8

Signed-off-by: Hao Chen <chenhao288@hisilicon.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
index 93455c7ed59d..37aa891f8133 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
@@ -29,6 +29,9 @@ static struct hns3_dbg_dentry_info hns3_dbg_dentry[] = {
 	{
 		.name = "queue"
 	},
+	{
+		.name = "fd"
+	},
 	/* keep common at the bottom and add new directory above */
 	{
 		.name = "common"
@@ -236,6 +239,13 @@ static struct hns3_dbg_cmd_info hns3_dbg_cmd[] = {
 		.buf_len = HNS3_DBG_READ_LEN_1MB,
 		.init = hns3_dbg_common_file_init,
 	},
+	{
+		.name = "fd_tcam",
+		.cmd = HNAE3_DBG_CMD_FD_TCAM,
+		.dentry = HNS3_DBG_DENTRY_FD,
+		.buf_len = HNS3_DBG_READ_LEN,
+		.init = hns3_dbg_common_file_init,
+	},
 };
 
 static struct hns3_dbg_cap_info hns3_dbg_cap[] = {
@@ -707,7 +717,6 @@ static void hns3_dbg_help(struct hnae3_handle *h)
 	if (!hns3_is_phys_func(h->pdev))
 		return;
 
-	dev_info(&h->pdev->dev, "dump fd tcam\n");
 	dev_info(&h->pdev->dev, "dump tc\n");
 	dev_info(&h->pdev->dev, "dump tm map <q_num>\n");
 	dev_info(&h->pdev->dev, "dump tm\n");