[dpdk-dev] [PATCH v5 1/3] ethdev: add Rx HW timestamp capability

[Raslan Darawsheh <rasland@mellanox.com>]

Add a new offload capability flag for Rx HW
timestamp and enabling/disabling this via rte_eth_rxmode.

Signed-off-by: Raslan Darawsheh <rasland@mellanox.com>
---
This patch should be applied after after this series:
http://dpdk.org/dev/patchwork/patch/29368/
---
 doc/guides/nics/features.rst  | 11 +++++++++++
 lib/librte_ether/rte_ethdev.c |  6 ++++++
 lib/librte_ether/rte_ethdev.h |  5 ++++-
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
index ba0d19f..fbdd6eb 100644
--- a/doc/guides/nics/features.rst
+++ b/doc/guides/nics/features.rst
@@ -566,6 +566,17 @@ Supports L4 checksum offload.
 * **[provides] rte_eth_dev_info**: ``rx_offload_capa:DEV_RX_OFFLOAD_UDP_CKSUM,DEV_RX_OFFLOAD_TCP_CKSUM``,
   ``tx_offload_capa:DEV_TX_OFFLOAD_UDP_CKSUM,DEV_TX_OFFLOAD_TCP_CKSUM,DEV_TX_OFFLOAD_SCTP_CKSUM``.
 
+.. _nic_features_hw_timestamp:
+
+Timestamp offload
+-----------------
+
+Supports Timestamp.
+
+* **[uses]     rte_eth_rxconf,rte_eth_rxmode**: ``offloads:DEV_RX_OFFLOAD_TIMESTAMP``.
+* **[provides] mbuf**: ``mbuf.ol_flags:PKT_RX_TIMESTAMP``.
+  ``mbuf.timestamp``.
+  **[provides] rte_eth_dev_info**: ``rx_offload_capa:DEV_RX_OFFLOAD_TIMESTAMP``
 
 .. _nic_features_macsec_offload:
 
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 9b73d23..c5c5164 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -715,6 +715,8 @@ rte_eth_convert_rx_offload_bitfield(const struct rte_eth_rxmode *rxmode,
 		offloads |= DEV_RX_OFFLOAD_SCATTER;
 	if (rxmode->enable_lro == 1)
 		offloads |= DEV_RX_OFFLOAD_TCP_LRO;
+	if (rxmode->hw_timestamp == 1)
+		offloads |= DEV_RX_OFFLOAD_TIMESTAMP;
 
 	*rx_offloads = offloads;
 }
@@ -763,6 +765,10 @@ rte_eth_convert_rx_offloads(const uint64_t rx_offloads,
 		rxmode->enable_lro = 1;
 	else
 		rxmode->enable_lro = 0;
+	if (rx_offloads & DEV_RX_OFFLOAD_TIMESTAMP)
+		rxmode->hw_timestamp = 1;
+	else
+		rxmode->hw_timestamp = 0;
 }
 
 int
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index ffd2ee5..bd63730 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -368,7 +368,8 @@ struct rte_eth_rxmode {
 		jumbo_frame      : 1, /**< Jumbo Frame Receipt enable. */
 		hw_strip_crc     : 1, /**< Enable CRC stripping by hardware. */
 		enable_scatter   : 1, /**< Enable scatter packets rx handler */
-		enable_lro       : 1; /**< Enable LRO */
+		enable_lro       : 1, /**< Enable LRO */
+		hw_timestamp	 : 1; /**< Enable HW timestamp */
 };
 
 /**
@@ -924,6 +925,8 @@ struct rte_eth_conf {
 #define DEV_RX_OFFLOAD_QINQ_STRIP  0x00000020
 #define DEV_RX_OFFLOAD_OUTER_IPV4_CKSUM 0x00000040
 #define DEV_RX_OFFLOAD_MACSEC_STRIP     0x00000080
+#define DEV_RX_OFFLOAD_TIMESTAMP 0x00000100
+/**< Device delivers timestamp of packet arrival. */
 
 /**
  * TX offload capabilities of a device.
-- 
2.7.4