[dpdk-dev] [PATCH v5 1/2] ethdev: add a field for rxq info structure

[Chengchang Tang <tangchengchang@huawei.com>]

Add a field named rx_buf_size in rte_eth_rxq_info to indicate the buffer
size used in receiving packets for HW.

In this way, upper-layer users can get this information by calling
rte_eth_rx_queue_info_get.

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Reviewed-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 app/proc-info/main.c                 | 13 +++++++++----
 app/test-pmd/config.c                |  2 ++
 doc/guides/rel_notes/deprecation.rst |  5 -----
 lib/librte_ethdev/rte_ethdev.h       |  1 +
 4 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/app/proc-info/main.c b/app/proc-info/main.c
index 0b030d3..64fb83b 100644
--- a/app/proc-info/main.c
+++ b/app/proc-info/main.c
@@ -708,15 +708,20 @@ show_port(void)
 		for (j = 0; j < dev_info.nb_rx_queues; j++) {
 			ret = rte_eth_rx_queue_info_get(i, j, &queue_info);
 			if (ret == 0) {
-				printf("\t  -- queue %d rx scatter %d"
-						" descriptors %d"
-						" offloads 0x%"PRIx64
-						" mempool socket %d\n",
+				printf("\t  -- queue %u rx scatter %u"
+						" descriptors %u"
+						" offloads 0x%" PRIx64
+						" mempool socket %d",
 						j,
 						queue_info.scattered_rx,
 						queue_info.nb_desc,
 						queue_info.conf.offloads,
 						queue_info.mp->socket_id);
+
+				if (queue_info.rx_buf_size != 0)
+					printf(" rx buffer size %u",
+						queue_info.rx_buf_size);
+				printf("\n");
 			}
 		}

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index b6eb2a5..2d9a456 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -452,6 +452,8 @@ rx_queue_infos_display(portid_t port_id, uint16_t queue_id)
 		(qinfo.conf.rx_deferred_start != 0) ? "on" : "off");
 	printf("\nRX scattered packets: %s",
 		(qinfo.scattered_rx != 0) ? "on" : "off");
+	if (qinfo.rx_buf_size != 0)
+		printf("\nRX buffer size: %hu", qinfo.rx_buf_size);
 	printf("\nNumber of RXDs: %hu", qinfo.nb_desc);

 	if (rte_eth_rx_burst_mode_get(port_id, queue_id, &mode) == 0)
diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index b136576..1beb76d 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -189,11 +189,6 @@ Deprecation Notices
   specified lengths into the buffers allocated from the specified
   memory pools. The backward compatibility to existing API is preserved.

-* ethdev: The ``struct rte_eth_rxq_info`` will be modified to include
-  a new optional field, indicating the buffer size used in receiving packets
-  for HW. This change is planned for 20.11. For more details:
-  https://mails.dpdk.org/archives/dev/2020-July/176135.html.
-
 * ethdev: ``rx_descriptor_done`` dev_ops and ``rte_eth_rx_descriptor_done``
   will be removed in 21.11.
   Existing ``rte_eth_rx_descriptor_status`` and ``rte_eth_tx_descriptor_status``
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index c3ab541..eeef52e 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1449,6 +1449,7 @@ struct rte_eth_rxq_info {
 	struct rte_eth_rxconf conf; /**< queue config parameters. */
 	uint8_t scattered_rx;       /**< scattered packets RX supported. */
 	uint16_t nb_desc;           /**< configured number of RXDs. */
+	uint16_t rx_buf_size;       /**< hardware receive buffer size. */
 } __rte_cache_min_aligned;

 /**
--
2.7.4