[dpdk-dev] [PATCH v3 09/16] net/octeontx2: switch Rx timestamp to dynamic mbuf field

[Thomas Monjalon]

The mbuf timestamp is moved to a dynamic field
in order to allow removal of the deprecated static field.
The related mbuf flag is also replaced.

The dynamic offset and flag are stored in struct otx2_timesync_info
to favor cache locality.

Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
---
 drivers/net/octeontx2/otx2_ethdev.c | 10 ++++++++++
 drivers/net/octeontx2/otx2_rx.h     | 19 ++++++++++++++++---
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index cfb733a4b5..f6962be9b2 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -2219,6 +2219,16 @@ otx2_nix_dev_start(struct rte_eth_dev *eth_dev)
 	else
 		otx2_nix_timesync_disable(eth_dev);
 
+	if (dev->rx_offload_flags & NIX_RX_OFFLOAD_TSTAMP_F) {
+		rc = rte_mbuf_dyn_rx_timestamp_register(
+				&dev->tstamp.tstamp_dynfield_offset,
+				&dev->tstamp.rx_tstamp_dynflag);
+		if (rc != 0) {
+			otx2_err("Failed to register Rx timestamp field/flag");
+			return -rte_errno;
+		}
+	}
+
 	/* Update VF about data off shifted by 8 bytes if PTP already
 	 * enabled in PF owning this VF
 	 */
diff --git a/drivers/net/octeontx2/otx2_rx.h b/drivers/net/octeontx2/otx2_rx.h
index 61a5c436dd..926f614a4e 100644
--- a/drivers/net/octeontx2/otx2_rx.h
+++ b/drivers/net/octeontx2/otx2_rx.h
@@ -49,6 +49,8 @@ struct otx2_timesync_info {
 	uint64_t	rx_tstamp;
 	rte_iova_t	tx_tstamp_iova;
 	uint64_t	*tx_tstamp;
+	uint64_t	rx_tstamp_dynflag;
+	int		tstamp_dynfield_offset;
 	uint8_t		tx_ready;
 	uint8_t		rx_ready;
 } __rte_cache_aligned;
@@ -63,6 +65,14 @@ union mbuf_initializer {
 	uint64_t value;
 };
 
+static inline rte_mbuf_timestamp_t *
+otx2_timestamp_dynfield(struct rte_mbuf *mbuf,
+		struct otx2_timesync_info *info)
+{
+	return RTE_MBUF_DYNFIELD(mbuf,
+		info->tstamp_dynfield_offset, rte_mbuf_timestamp_t *);
+}
+
 static __rte_always_inline void
 otx2_nix_mbuf_to_tstamp(struct rte_mbuf *mbuf,
 			struct otx2_timesync_info *tstamp, const uint16_t flag,
@@ -77,15 +87,18 @@ otx2_nix_mbuf_to_tstamp(struct rte_mbuf *mbuf,
 		/* Reading the rx timestamp inserted by CGX, viz at
 		 * starting of the packet data.
 		 */
-		mbuf->timestamp = rte_be_to_cpu_64(*tstamp_ptr);
+		*otx2_timestamp_dynfield(mbuf, tstamp) =
+				rte_be_to_cpu_64(*tstamp_ptr);
 		/* PKT_RX_IEEE1588_TMST flag needs to be set only in case
 		 * PTP packets are received.
 		 */
 		if (mbuf->packet_type == RTE_PTYPE_L2_ETHER_TIMESYNC) {
-			tstamp->rx_tstamp = mbuf->timestamp;
+			tstamp->rx_tstamp =
+					*otx2_timestamp_dynfield(mbuf, tstamp);
 			tstamp->rx_ready = 1;
 			mbuf->ol_flags |= PKT_RX_IEEE1588_PTP |
-				PKT_RX_IEEE1588_TMST | PKT_RX_TIMESTAMP;
+				PKT_RX_IEEE1588_TMST |
+				tstamp->rx_tstamp_dynflag;
 		}
 	}
 }
-- 
2.28.0