[dpdk-dev] [PATCH 10/15] net/octeontx2: switch 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.

Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
---
 drivers/net/octeontx2/otx2_ethdev.c | 33 +++++++++++++++++++++++++++++
 drivers/net/octeontx2/otx2_rx.h     | 19 ++++++++++++++---
 drivers/net/octeontx2/version.map   |  7 ++++++
 3 files changed, 56 insertions(+), 3 deletions(-)

diff --git a/drivers/net/octeontx2/otx2_ethdev.c b/drivers/net/octeontx2/otx2_ethdev.c
index cfb733a4b5..ad95219438 100644
--- a/drivers/net/octeontx2/otx2_ethdev.c
+++ b/drivers/net/octeontx2/otx2_ethdev.c
@@ -4,6 +4,7 @@
 
 #include <inttypes.h>
 
+#include <rte_bitops.h>
 #include <rte_ethdev_pci.h>
 #include <rte_io.h>
 #include <rte_malloc.h>
@@ -14,6 +15,35 @@
 #include "otx2_ethdev.h"
 #include "otx2_ethdev_sec.h"
 
+uint64_t rte_pmd_octeontx2_timestamp_rx_dynflag;
+int rte_pmd_octeontx2_timestamp_dynfield_offset = -1;
+
+static int
+otx2_rx_timestamp_setup(uint16_t flags)
+{
+	int timestamp_rx_dynflag_offset;
+
+	if ((flags & NIX_RX_OFFLOAD_TSTAMP_F) == 0)
+		return 0;
+
+	rte_pmd_octeontx2_timestamp_dynfield_offset = rte_mbuf_dynfield_lookup(
+			RTE_MBUF_DYNFIELD_TIMESTAMP_NAME, NULL);
+	if (rte_pmd_octeontx2_timestamp_dynfield_offset < 0) {
+		otx2_err("Failed to lookup timestamp field");
+		return -rte_errno;
+	}
+	timestamp_rx_dynflag_offset = rte_mbuf_dynflag_lookup(
+			RTE_MBUF_DYNFLAG_RX_TIMESTAMP_NAME, NULL);
+	if (timestamp_rx_dynflag_offset < 0) {
+		otx2_err("Failed to lookup Rx timestamp flag");
+		return -rte_errno;
+	}
+	rte_pmd_octeontx2_timestamp_rx_dynflag =
+			RTE_BIT64(timestamp_rx_dynflag_offset);
+
+	return 0;
+}
+
 static inline uint64_t
 nix_get_rx_offload_capa(struct otx2_eth_dev *dev)
 {
@@ -1874,6 +1904,9 @@ otx2_nix_configure(struct rte_eth_dev *eth_dev)
 	dev->tx_offload_flags |= nix_tx_offload_flags(eth_dev);
 	dev->rss_info.rss_grps = NIX_RSS_GRPS;
 
+	if (otx2_rx_timestamp_setup(dev->rx_offload_flags) != 0)
+		goto fail_offloads;
+
 	nb_rxq = RTE_MAX(data->nb_rx_queues, 1);
 	nb_txq = RTE_MAX(data->nb_tx_queues, 1);
 
diff --git a/drivers/net/octeontx2/otx2_rx.h b/drivers/net/octeontx2/otx2_rx.h
index 61a5c436dd..6981edce82 100644
--- a/drivers/net/octeontx2/otx2_rx.h
+++ b/drivers/net/octeontx2/otx2_rx.h
@@ -63,6 +63,18 @@ union mbuf_initializer {
 	uint64_t value;
 };
 
+/* variables are exported because this file is included in other drivers */
+extern uint64_t rte_pmd_octeontx2_timestamp_rx_dynflag;
+extern int rte_pmd_octeontx2_timestamp_dynfield_offset;
+
+static inline rte_mbuf_timestamp_t *
+otx2_timestamp_dynfield(struct rte_mbuf *mbuf)
+{
+	return RTE_MBUF_DYNFIELD(mbuf,
+		rte_pmd_octeontx2_timestamp_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 +89,16 @@ 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) = 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->rx_ready = 1;
 			mbuf->ol_flags |= PKT_RX_IEEE1588_PTP |
-				PKT_RX_IEEE1588_TMST | PKT_RX_TIMESTAMP;
+				PKT_RX_IEEE1588_TMST |
+				rte_pmd_octeontx2_timestamp_rx_dynflag;
 		}
 	}
 }
diff --git a/drivers/net/octeontx2/version.map b/drivers/net/octeontx2/version.map
index 4a76d1d52d..d4f4784bcd 100644
--- a/drivers/net/octeontx2/version.map
+++ b/drivers/net/octeontx2/version.map
@@ -1,3 +1,10 @@
 DPDK_21 {
 	local: *;
 };
+
+INTERNAL {
+	global:
+
+	rte_pmd_octeontx2_timestamp_dynfield_offset;
+	rte_pmd_octeontx2_timestamp_rx_dynflag;
+};
-- 
2.28.0