net: hns3: refactor queue info of debugfs

Currently, the debugfs command for queue info is implemented by
"echo xxxx > cmd", and record the information in dmesg. It's
unnecessary and heavy. To improve it, create two files
"rx_queue_info" and "tx_queue_info" for it, and query it
by command "cat rx_queue_info" and "cat tx_queue_info",
return the result to userspace, rather than record in dmesg.

The display style is below:
$ cat rx_queue_info
QUEUE_ID  BD_NUM  BD_LEN  TAIL  HEAD  FBDNUM  PKTNUM   ...
0           0       0     0     0       0       0      ...
1           0       0     0     0       0       0      ...
2           0       0     0     0       0       0      ...

$ cat tx_queue_info
QUEUE_ID  BD_NUM  TC  TAIL  HEAD  FBDNUM  OFFSET  PKTNUM  ...
0           0     0     0     0       0       0        0  ...
1           0     0     0     0       0       0        0  ...
2           0     0     0     0       0       0        0  ...
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>

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

@@ -277,6 +277,8 @@ enum hnae3_dbg_cmd {
 	HNAE3_DBG_CMD_REG_MAC,
 	HNAE3_DBG_CMD_REG_DCB,
 	HNAE3_DBG_CMD_QUEUE_MAP,
+	HNAE3_DBG_CMD_RX_QUEUE_INFO,
+	HNAE3_DBG_CMD_TX_QUEUE_INFO,
 	HNAE3_DBG_CMD_UNKNOWN,
 };
 

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

@@ -6,6 +6,7 @@
 
 #define HNS3_DBG_READ_LEN	65536
 #define HNS3_DBG_READ_LEN_128KB	0x20000
+#define HNS3_DBG_READ_LEN_1MB	0x100000
 #define HNS3_DBG_READ_LEN_4MB	0x400000
 #define HNS3_DBG_WRITE_LEN	1024