[dpdk-dev] [PATCH 1/3] ether: Update field name and description for queue start

[Ouyang Changchun <changchun.ouyang@intel.com>]

Rename the field name from start_rx_per_q to rx_enable_queue in
struct rte_eth_rxconf, and do same thing for TX.
 
This patch also update description for field rx_enable_queue and tx_enable_queue.

Signed-off-by: Ouyang Changchun <changchun.ouyang@intel.com>
---
 lib/librte_ether/rte_ethdev.h | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 50df654..a452810 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -604,7 +604,16 @@ struct rte_eth_rxconf {
 	struct rte_eth_thresh rx_thresh; /**< RX ring threshold registers. */
 	uint16_t rx_free_thresh; /**< Drives the freeing of RX descriptors. */
 	uint8_t rx_drop_en; /**< Drop packets if no descriptors are available. */
-	uint8_t start_rx_per_q; /**< start rx per queue. */
+	/**< If rx_enable_queue is true, rte_eth_dev_rx_queue_start must be
+		invocated after rte_eth_dev_start's invocation to start RX for
+		one queue, and rte_eth_dev_rx_queue_start instead of
+		rte_eth_dev_start is responsible for allocating mbuf from
+		mempool and setup the DMA physical address. It is useful in
+		such scenario: buffer address is not available at the point of
+		rte_eth_dev_start's invocation but available later, e.g. in
+		VHOST zero copy case, the buffer address to be setup DMA
+		address is available only after one VM startup. */
+	uint8_t rx_enable_queue;
 };
 
 #define ETH_TXQ_FLAGS_NOMULTSEGS 0x0001 /**< nb_segs=1 for all mbufs */
@@ -625,7 +634,10 @@ struct rte_eth_txconf {
 	uint16_t tx_rs_thresh; /**< Drives the setting of RS bit on TXDs. */
 	uint16_t tx_free_thresh; /**< Drives the freeing of TX buffers. */
 	uint32_t txq_flags; /**< Set flags for the Tx queue */
-	uint8_t start_tx_per_q; /**< start tx per queue. */
+	/**< If tx_enable_queue is true, rte_eth_dev_tx_queue_start must be
+		invocated after rte_eth_dev_start's invocation to start TX for
+		one queue. Refer to start_rx_per_q for the use case. */
+	uint8_t tx_enable_queue;
 };
 
 /**
-- 
1.8.4.2