[PATCH V3 app/testpmd 3/4] app/testpmd: compact RSS types output in some commands

[Huisong Li <lihuisong@huawei.com>]

From: Ferruh Yigit <ferruh.yigit@xilinx.com>

In port info command output, 'show port info all', supported RSS offload
types printed one type per line, and although this information is not
most important part of the command it takes big part of the command
output.

In port RSS hash and flow RSS command output, 'show port 0 rss-hash',
and 'flow query 0 0 rss', all enabled RSS types are printed on one line.
If there are many types, the print will be very long.

Compacting these RSS offloads and types output by fixing the length of the
character string printed on each line, instead of one per line or one line.
Output becomes as following:

Supported RSS offload flow types:
  ipv4-frag  ipv4-tcp  ipv4-udp  ipv4-sctp  ipv4-other  ipv6-frag  ipv6-tcp
  ipv6-udp  ipv6-sctp  ipv6-other  l4-dst-only  l4-src-only  l3-dst-only
  l3-src-only

Signed-off-by: Ferruh Yigit <ferruh.yigit@xilinx.com>
Signed-off-by: Huisong Li <lihuisong@huawei.com>
---
 app/test-pmd/config.c | 64 ++++++++++++++++++++++++++++++++-----------
 1 file changed, 48 insertions(+), 16 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 9cb1211f00..209cbcc514 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -66,6 +66,8 @@
 
 #define NS_PER_SEC 1E9
 
+#define MAX_CHAR_NUM_PER_LINE 64
+
 static const struct {
 	enum tx_pkt_split split;
 	const char *name;
@@ -198,6 +200,8 @@ const struct rss_type_info rss_type_table[] = {
 static void
 rss_types_display(uint64_t rss_types)
 {
+	uint16_t total_len = 0;
+	uint16_t str_len = 0;
 	uint16_t i;
 
 	if (rss_types == 0)
@@ -206,9 +210,18 @@ rss_types_display(uint64_t rss_types)
 	for (i = 0; rss_type_table[i].str; i++) {
 		if (rss_type_table[i].rss_type == 0)
 			continue;
+
 		if ((rss_types & rss_type_table[i].rss_type) ==
-						rss_type_table[i].rss_type)
+						rss_type_table[i].rss_type) {
+			/* contain two blanks */
+			str_len = strlen(rss_type_table[i].str) + 2;
+			if (total_len + str_len > MAX_CHAR_NUM_PER_LINE) {
+				printf("\n");
+				total_len = 0;
+			}
 			printf("  %s", rss_type_table[i].str);
+			total_len += str_len;
+		}
 	}
 }
 
@@ -766,6 +779,38 @@ rss_offload_to_str(uint64_t rss_offload)
 	return NULL;
 }
 
+static void
+rss_offload_types_display(uint64_t rss_offload_types)
+{
+#define USER_DEFINED_DISPLAY_STR_LEN 23
+
+	uint16_t total_len = 0;
+	uint16_t str_len = 0;
+	uint64_t rss_offload;
+	uint16_t i;
+
+	for (i = 0; i < sizeof(rss_offload_types) * CHAR_BIT; i++) {
+		rss_offload = RTE_BIT64(i);
+		if ((rss_offload_types & rss_offload) != 0) {
+			const char *p = rss_offload_to_str(rss_offload);
+
+			str_len = p ? strlen(p) : USER_DEFINED_DISPLAY_STR_LEN;
+			str_len += 2; /* add two blanks */
+			if (total_len + str_len >= MAX_CHAR_NUM_PER_LINE) {
+				total_len = 0;
+				printf("\n");
+			}
+
+			if (p)
+				printf("  %s", p);
+			else
+				printf("  user defined 0x%"PRIx64"",
+				       rss_offload);
+			total_len += str_len;
+		}
+	}
+}
+
 void
 port_infos_display(portid_t port_id)
 {
@@ -870,22 +915,9 @@ port_infos_display(portid_t port_id)
 	if (!dev_info.flow_type_rss_offloads)
 		printf("No RSS offload flow type is supported.\n");
 	else {
-		uint64_t rss_offload_types = dev_info.flow_type_rss_offloads;
-		uint16_t i;
-
 		printf("Supported RSS offload flow types:\n");
-		for (i = 0; i < sizeof(rss_offload_types) * CHAR_BIT; i++) {
-			uint64_t rss_offload = RTE_BIT64(i);
-			if ((rss_offload_types & rss_offload) != 0) {
-				const char *p =
-					rss_offload_to_str(rss_offload);
-				if (p)
-					printf("  %s\n", p);
-				else
-					printf("  user defined 0x%"PRIx64"\n",
-					       rss_offload);
-			}
-		}
+		rss_offload_types_display(dev_info.flow_type_rss_offloads);
+		printf("\n");
 	}
 
 	printf("Minimum size of RX buffer: %u\n", dev_info.min_rx_bufsize);
-- 
2.33.0