[dpdk-dev] [PATCH v2] i40e:Fix the Description Done check mechanism for i40e

[Zhe Tao]

If the descriptor the device derive is handling is the context descriptor its type will be 0x1, so using the not expression, the device driver will consider the descriptor has been completed for transmission even its DD field is still 0x1 which means NIC has't finished the operation on this descriptor. 

Signed-off-by: Zhe Tao <zhe.tao at intel.com>
---
 drivers/net/i40e/i40e_fdir.c |  3 ++-
 drivers/net/i40e/i40e_rxtx.c | 10 ++++++----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/net/i40e/i40e_fdir.c b/drivers/net/i40e/i40e_fdir.c
index 4bf98d0..f3cb757 100644
--- a/drivers/net/i40e/i40e_fdir.c
+++ b/drivers/net/i40e/i40e_fdir.c
@@ -1110,7 +1110,8 @@ i40e_fdir_filter_programming(struct i40e_pf *pf,
 
 	for (i = 0; i < I40E_FDIR_WAIT_COUNT; i++) {
 		rte_delay_us(I40E_FDIR_WAIT_INTERVAL_US);
-		if (txdp->cmd_type_offset_bsz &
+		if ((txdp->cmd_type_offset_bsz &
+				rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) ==
 				rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
 			break;
 	}
diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index 2de0ac4..7c0c684 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -574,8 +574,9 @@ i40e_xmit_cleanup(struct i40e_tx_queue *txq)
 		desc_to_clean_to = (uint16_t)(desc_to_clean_to - nb_tx_desc);
 
 	desc_to_clean_to = sw_ring[desc_to_clean_to].last_id;
-	if (!(txd[desc_to_clean_to].cmd_type_offset_bsz &
-		rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))) {
+	if ((txd[desc_to_clean_to].cmd_type_offset_bsz &
+			rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
+			rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE)) {
 		PMD_TX_FREE_LOG(DEBUG, "TX descriptor %4u is not done "
 			"(port=%d queue=%d)", desc_to_clean_to,
 				txq->port_id, txq->queue_id);
@@ -1431,8 +1432,9 @@ i40e_tx_free_bufs(struct i40e_tx_queue *txq)
 	struct i40e_tx_entry *txep;
 	uint16_t i;
 
-	if (!(txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
-			rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE)))
+	if ((txq->tx_ring[txq->tx_next_dd].cmd_type_offset_bsz &
+			rte_cpu_to_le_64(I40E_TXD_QW1_DTYPE_MASK)) !=
+			rte_cpu_to_le_64(I40E_TX_DESC_DTYPE_DESC_DONE))
 		return 0;
 
 	txep = &(txq->sw_ring[txq->tx_next_dd - (txq->tx_rs_thresh - 1)]);
-- 
1.8.4.2