[dpdk-dev] [PATCH] fm10k: enable TSO support

[Wang Xiao W <xiao.w.wang@intel.com>]

This patch enables fm10k TSO feature for both non-tunneling packet
and tunneling packet.

Signed-off-by: Wang Xiao W <xiao.w.wang@intel.com>
---
 drivers/net/fm10k/base/fm10k_osdep.h |  5 +++++
 drivers/net/fm10k/fm10k_ethdev.c     |  3 ++-
 drivers/net/fm10k/fm10k_rxtx.c       | 21 ++++++++++++++++++---
 3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/net/fm10k/base/fm10k_osdep.h b/drivers/net/fm10k/base/fm10k_osdep.h
index 53c433c..a1bfa09 100644
--- a/drivers/net/fm10k/base/fm10k_osdep.h
+++ b/drivers/net/fm10k/base/fm10k_osdep.h
@@ -145,4 +145,9 @@ typedef int        bool;
 #define fm10k_read_reg FM10K_READ_REG
 #endif
 
+#define FM10K_TSO_MINMSS \
+	(FM10K_DMA_CTRL_MINMSS_64 >> FM10K_DMA_CTRL_MINMSS_SHIFT)
+#define FM10K_TSO_MIN_HEADERLEN			54
+#define FM10K_TSO_MAX_HEADERLEN			192
+
 #endif /* _FM10K_OSDEP_H_ */
diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index a69c990..b104fc2 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -937,7 +937,8 @@ fm10k_dev_infos_get(struct rte_eth_dev *dev,
 		DEV_TX_OFFLOAD_VLAN_INSERT |
 		DEV_TX_OFFLOAD_IPV4_CKSUM  |
 		DEV_TX_OFFLOAD_UDP_CKSUM   |
-		DEV_TX_OFFLOAD_TCP_CKSUM;
+		DEV_TX_OFFLOAD_TCP_CKSUM   |
+		DEV_TX_OFFLOAD_TCP_TSO;
 
 	dev_info->hash_key_size = FM10K_RSSRK_SIZE * sizeof(uint32_t);
 	dev_info->reta_size = FM10K_MAX_RSS_INDICES;
diff --git a/drivers/net/fm10k/fm10k_rxtx.c b/drivers/net/fm10k/fm10k_rxtx.c
index b5fa2e6..aed3e92 100644
--- a/drivers/net/fm10k/fm10k_rxtx.c
+++ b/drivers/net/fm10k/fm10k_rxtx.c
@@ -410,7 +410,7 @@ static inline void tx_free_descriptors(struct fm10k_tx_queue *q)
 static inline void tx_xmit_pkt(struct fm10k_tx_queue *q, struct rte_mbuf *mb)
 {
 	uint16_t last_id;
-	uint8_t flags;
+	uint8_t flags, hdrlen;
 
 	/* always set the LAST flag on the last descriptor used to
 	 * transmit the packet */
@@ -435,7 +435,7 @@ static inline void tx_xmit_pkt(struct fm10k_tx_queue *q, struct rte_mbuf *mb)
 	/* set checksum flags on first descriptor of packet. SCTP checksum
 	 * offload is not supported, but we do not explicitly check for this
 	 * case in favor of greatly simplified processing. */
-	if (mb->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK))
+	if (mb->ol_flags & (PKT_TX_IP_CKSUM | PKT_TX_L4_MASK | PKT_TX_TCP_SEG))
 		q->hw_ring[q->next_free].flags |= FM10K_TXD_FLAG_CSUM;
 
 	/* set vlan if requested */
@@ -447,6 +447,21 @@ static inline void tx_xmit_pkt(struct fm10k_tx_queue *q, struct rte_mbuf *mb)
 			rte_cpu_to_le_64(MBUF_DMA_ADDR(mb));
 	q->hw_ring[q->next_free].buflen =
 			rte_cpu_to_le_16(rte_pktmbuf_data_len(mb));
+
+	if (mb->ol_flags & PKT_TX_TCP_SEG) {
+		hdrlen = mb->outer_l2_len + mb->outer_l3_len + mb->l2_len +
+			mb->l3_len + mb->l4_len;
+		if (q->hw_ring[q->next_free].flags & FM10K_TXD_FLAG_FTAG)
+			hdrlen += sizeof(struct fm10k_ftag);
+
+		if ((hdrlen >= FM10K_TSO_MIN_HEADERLEN) &&
+				(hdrlen <= FM10K_TSO_MAX_HEADERLEN) &&
+				(mb->tso_segsz >= FM10K_TSO_MINMSS)) {
+			q->hw_ring[q->next_free].mss = mb->tso_segsz;
+			q->hw_ring[q->next_free].hdrlen = hdrlen;
+		}
+	}
+
 	if (++q->next_free == q->nb_desc)
 		q->next_free = 0;
 
@@ -462,7 +477,7 @@ static inline void tx_xmit_pkt(struct fm10k_tx_queue *q, struct rte_mbuf *mb)
 			q->next_free = 0;
 	}
 
-	q->hw_ring[last_id].flags = flags;
+	q->hw_ring[last_id].flags |= flags;
 }
 
 uint16_t
-- 
1.9.3