[PATCH v3 17/18] net/dpaa: improve dpaa errata A010022 handling

[Hemant Agrawal <hemant.agrawal@nxp.com>]

From: Jun Yang <jun.yang@nxp.com>

This patch improves the errata handling for
"RTE_LIBRTE_DPAA_ERRATA_LS1043_A010022"

Signed-off-by: Jun Yang <jun.yang@nxp.com>
---
 drivers/net/dpaa/dpaa_rxtx.c | 40 ++++++++++++++++++++++++++++--------
 1 file changed, 32 insertions(+), 8 deletions(-)

diff --git a/drivers/net/dpaa/dpaa_rxtx.c b/drivers/net/dpaa/dpaa_rxtx.c
index d82c6f3be2..1d7efdef88 100644
--- a/drivers/net/dpaa/dpaa_rxtx.c
+++ b/drivers/net/dpaa/dpaa_rxtx.c
@@ -1258,6 +1258,35 @@ reallocate_mbuf(struct qman_fq *txq, struct rte_mbuf *mbuf)
 	return new_mbufs[0];
 }
 
+#ifdef RTE_LIBRTE_DPAA_ERRATA_LS1043_A010022
+/* In case the data offset is not multiple of 16,
+ * FMAN can stall because of an errata. So reallocate
+ * the buffer in such case.
+ */
+static inline int
+dpaa_eth_ls1043a_mbuf_realloc(struct rte_mbuf *mbuf)
+{
+	uint64_t len, offset;
+
+	if (dpaa_svr_family != SVR_LS1043A_FAMILY)
+		return 0;
+
+	while (mbuf) {
+		len = mbuf->data_len;
+		offset = mbuf->data_off;
+		if ((mbuf->next &&
+			!rte_is_aligned((void *)len, 16)) ||
+			!rte_is_aligned((void *)offset, 16)) {
+			DPAA_PMD_DEBUG("Errata condition hit");
+
+			return 1;
+		}
+		mbuf = mbuf->next;
+	}
+	return 0;
+}
+#endif
+
 uint16_t
 dpaa_eth_queue_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 {
@@ -1296,14 +1325,6 @@ dpaa_eth_queue_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 				DPAA_TX_BURST_SIZE : nb_bufs;
 		for (loop = 0; loop < frames_to_send; loop++) {
 			mbuf = *(bufs++);
-			/* In case the data offset is not multiple of 16,
-			 * FMAN can stall because of an errata. So reallocate
-			 * the buffer in such case.
-			 */
-			if (dpaa_svr_family == SVR_LS1043A_FAMILY &&
-					(mbuf->data_off & 0x7F) != 0x0)
-				realloc_mbuf = 1;
-
 			fd_arr[loop].cmd = 0;
 			if (dpaa_ieee_1588) {
 				fd_arr[loop].cmd |= DPAA_FD_CMD_FCO |
@@ -1311,6 +1332,9 @@ dpaa_eth_queue_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 				fd_arr[loop].cmd |= DPAA_FD_CMD_RPD |
 					DPAA_FD_CMD_UPD;
 			}
+#ifdef RTE_LIBRTE_DPAA_ERRATA_LS1043_A010022
+			realloc_mbuf = dpaa_eth_ls1043a_mbuf_realloc(mbuf);
+#endif
 			seqn = *dpaa_seqn(mbuf);
 			if (seqn != DPAA_INVALID_MBUF_SEQN) {
 				index = seqn - 1;
-- 
2.25.1