[PATCH v3 4/4] app/procinfo: support descriptor dump

["Min Hu (Connor)" <humin29@huawei.com>]

This patch support HW Rx/Tx descriptor dump

The command is like:
dpdk-proc-info -a xxxx:xx:xx.x --file-prefix=xxx -- --
--show-rx-descriptor queue_id:descriptor_id

dpdk-proc-info -a xxxx:xx:xx.x --file-prefix=xxx -- --
--show-tx-descriptor queue_id:descriptor_id

Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 app/proc-info/main.c | 81 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/app/proc-info/main.c b/app/proc-info/main.c
index 56070a3317..eab1b546d1 100644
--- a/app/proc-info/main.c
+++ b/app/proc-info/main.c
@@ -48,6 +48,9 @@
 #define STATS_BDR_STR(w, s) printf("%.*s%s%.*s\n", w, \
 	STATS_BDR_FMT, s, w, STATS_BDR_FMT)
 
+typedef int (*desc_dump_t)(FILE *file, uint16_t port_id, uint16_t queue_id,
+			    uint16_t desc_id);
+
 /**< mask of enabled ports */
 static unsigned long enabled_port_mask;
 /**< Enable stats. */
@@ -100,6 +103,12 @@ static char *mempool_iter_name;
 /**< Enable dump regs. */
 static uint32_t enable_dump_regs;
 static char *dump_regs_file_prefix;
+/**< Enable dump buffer descriptor. */
+#define MAX_NB_ITEM 2
+static uint16_t rx_nb_item;
+static uint16_t tx_nb_item;
+static uint16_t rx_item_opt[MAX_NB_ITEM];
+static uint16_t tx_item_opt[MAX_NB_ITEM];
 
 /**< display usage */
 static void
@@ -127,6 +136,8 @@ proc_info_usage(const char *prgname)
 		"  --show-crypto: to display crypto information\n"
 		"  --show-ring[=name]: to display ring information\n"
 		"  --show-mempool[=name]: to display mempool information\n"
+		"  --show-rx-descriptor queue_id:descriptor_id: to display ports Rx buffer description by queue id and descriptor id\n"
+		"  --show-tx-descriptor queue_id:descriptor_id: to display ports Tx buffer description by queue id and descriptor id\n"
 		"  --iter-mempool=name: iterate mempool elements to display content\n"
 		"  --dump-regs=file-prefix: dump registers to file with the file-prefix\n",
 		prgname);
@@ -179,6 +190,34 @@ parse_xstats_ids(char *list, uint64_t *ids, int limit) {
 	return length;
 }
 
+/*
+ * Parse ids value list into array
+ */
+static int
+parse_descriptor_param(char *list, uint16_t *item_opt, int limit)
+{
+	int length;
+	char *token;
+	char *ctx = NULL;
+	char *endptr;
+
+	length = 0;
+	token = strtok_r(list, ":", &ctx);
+	while (token != NULL) {
+		item_opt[length] = strtoul(token, &endptr, 10);
+		if (*endptr != '\0')
+			return -EINVAL;
+
+		length++;
+		if (length > limit)
+			return -E2BIG;
+
+		token = strtok_r(NULL, ":", &ctx);
+	}
+
+	return length;
+}
+
 static int
 proc_info_preparse_args(int argc, char **argv)
 {
@@ -238,6 +277,8 @@ proc_info_parse_args(int argc, char **argv)
 		{"show-mempool", optional_argument, NULL, 0},
 		{"iter-mempool", required_argument, NULL, 0},
 		{"dump-regs", required_argument, NULL, 0},
+		{"show-rx-descriptor", required_argument, NULL, 1},
+		{"show-tx-descriptor", required_argument, NULL, 1},
 		{NULL, 0, 0, 0}
 	};
 
@@ -327,6 +368,26 @@ proc_info_parse_args(int argc, char **argv)
 					return -1;
 				}
 				nb_xstats_ids = ret;
+			} else if (!strncmp(long_option[option_index].name,
+				"show-rx-descriptor", MAX_LONG_OPT_SZ)) {
+				int ret = parse_descriptor_param(optarg,
+								 rx_item_opt,
+								 MAX_NB_ITEM);
+				if (ret < MAX_NB_ITEM) {
+					printf("Rx descriptor param parse error.\n");
+					return -1;
+				}
+				rx_nb_item = ret;
+			} else if (!strncmp(long_option[option_index].name,
+				"show-tx-descriptor", MAX_LONG_OPT_SZ)) {
+				int ret = parse_descriptor_param(optarg,
+								 tx_item_opt,
+								 MAX_NB_ITEM);
+				if (ret < MAX_NB_ITEM) {
+					printf("Tx descriptor param parse error.\n");
+					return -1;
+				}
+				tx_nb_item = ret;
 			}
 			break;
 		default:
@@ -1450,6 +1511,20 @@ dump_regs(char *file_prefix)
 	}
 }
 
+static void
+nic_descriptor_display(uint16_t port_id, uint16_t *item_opt,
+		       desc_dump_t desc_dump)
+{
+	static const char *nic_desc_border = "###";
+	uint16_t queue_id = item_opt[0];
+	uint16_t desc_id = item_opt[1];
+
+	printf("%s NIC descriptor for port %u %s\n",
+		   nic_desc_border, port_id, nic_desc_border);
+
+	desc_dump(stdout, port_id, queue_id, desc_id);
+}
+
 int
 main(int argc, char **argv)
 {
@@ -1533,6 +1608,12 @@ main(int argc, char **argv)
 		else if (nb_xstats_ids > 0)
 			nic_xstats_by_ids_display(i, xstats_ids,
 						  nb_xstats_ids);
+		else if (rx_nb_item > 0)
+			nic_descriptor_display(i, rx_item_opt,
+					       rte_eth_rx_hw_desc_dump);
+		else if (tx_nb_item > 0)
+			nic_descriptor_display(i, tx_item_opt,
+					       rte_eth_tx_hw_desc_dump);
 #ifdef RTE_LIB_METRICS
 		else if (enable_metrics)
 			metrics_display(i);
-- 
2.33.0