[dpdk-dev] [PATCH] ethdev: add queue state when retrieve queue information

[Lijun Ou <oulijun@huawei.com>]

Currently, upper-layer application could get queue state only
through pointers such as dev->data->tx_queue_state[queue_id],
this is not the recommended way to access it. So this patch
add get queue state when call rte_eth_rx_queue_info_get and
rte_eth_tx_queue_info_get API.

Note: The hairpin queue is not supported with above
rte_eth_*x_queue_info_get, so the queue state could be
RTE_ETH_QUEUE_STATE_STARTED or RTE_ETH_QUEUE_STATE_STOPPED.
Note: After add queue_state field, the 'struct rte_eth_rxq_info' size
remains 128B, and the 'struct rte_eth_txq_info' size remains 64B, so
it could be ABI compatible.

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
 doc/guides/rel_notes/release_21_05.rst | 6 ++++++
 lib/librte_ethdev/rte_ethdev.c         | 3 +++
 lib/librte_ethdev/rte_ethdev.h         | 4 ++++
 3 files changed, 13 insertions(+)

diff --git a/doc/guides/rel_notes/release_21_05.rst b/doc/guides/rel_notes/release_21_05.rst
index 43063e3..165b5f7 100644
--- a/doc/guides/rel_notes/release_21_05.rst
+++ b/doc/guides/rel_notes/release_21_05.rst
@@ -156,6 +156,12 @@ ABI Changes
 
 * No ABI change that would break compatibility with 20.11.
 
+* Added new field ``queue_state`` to ``rte_eth_rxq_info`` structure
+  to provide indicated rxq queue state.
+
+* Added new field ``queue_state`` to ``rte_eth_txq_info`` structure
+  to provide indicated txq queue state.
+
 
 Known Issues
 ------------
diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 3059aa5..fbd10b2 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -5042,6 +5042,8 @@ rte_eth_rx_queue_info_get(uint16_t port_id, uint16_t queue_id,
 
 	memset(qinfo, 0, sizeof(*qinfo));
 	dev->dev_ops->rxq_info_get(dev, queue_id, qinfo);
+	qinfo->queue_state = dev->data->rx_queue_state[queue_id];
+
 	return 0;
 }
 
@@ -5082,6 +5084,7 @@ rte_eth_tx_queue_info_get(uint16_t port_id, uint16_t queue_id,
 
 	memset(qinfo, 0, sizeof(*qinfo));
 	dev->dev_ops->txq_info_get(dev, queue_id, qinfo);
+	qinfo->queue_state = dev->data->tx_queue_state[queue_id];
 
 	return 0;
 }
diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
index efda313..3b83c5a 100644
--- a/lib/librte_ethdev/rte_ethdev.h
+++ b/lib/librte_ethdev/rte_ethdev.h
@@ -1591,6 +1591,8 @@ struct rte_eth_rxq_info {
 	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. */
+	/**< Queues state: STARTED(1) / STOPPED(0). */
+	uint8_t queue_state;
 } __rte_cache_min_aligned;
 
 /**
@@ -1600,6 +1602,8 @@ struct rte_eth_rxq_info {
 struct rte_eth_txq_info {
 	struct rte_eth_txconf conf; /**< queue config parameters. */
 	uint16_t nb_desc;           /**< configured number of TXDs. */
+	/**< Queues state: STARTED(1) / STOPPED(0). */
+	uint8_t queue_state;
 } __rte_cache_min_aligned;
 
 /* Generic Burst mode flag definition, values can be ORed. */
-- 
2.7.4