[dpdk-dev,v3,2/3] i40e:enable TSO support
Commit Message
This patch enables i40e TSO feature for both non-tunneling packet and tunneling packet
Signed-off-by: Jijiang Liu <jijiang.liu@intel.com>
Signed-off-by: Miroslaw Walukiewicz <miroslaw.walukiewicz@intel.com>
Signed-off-by: Grzegorz Galkowski <grzegorz.galkowski@intel.com>
---
lib/librte_pmd_i40e/i40e_rxtx.c | 60 +++++++++++++++++++++++++++++++++++---
lib/librte_pmd_i40e/i40e_rxtx.h | 2 +
2 files changed, 57 insertions(+), 5 deletions(-)
@@ -506,6 +506,13 @@ i40e_txd_enable_checksum(uint64_t ol_flags,
<< I40E_TX_DESC_LENGTH_IPLEN_SHIFT;
}
+ if (ol_flags & PKT_TX_TCP_SEG) {
+ *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_TCP;
+ *td_offset |= (tx_offload.l4_len >> 2)
+ << I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
+ return;
+ }
+
/* Enable L4 checksum offloads */
switch (ol_flags & PKT_TX_L4_MASK) {
case PKT_TX_TCP_CKSUM:
@@ -1154,7 +1161,7 @@ i40e_calc_context_desc(uint64_t flags)
{
uint64_t mask = 0ULL;
- mask |= PKT_TX_OUTER_IP_CKSUM;
+ mask |= (PKT_TX_OUTER_IP_CKSUM | PKT_TX_TCP_SEG);
#ifdef RTE_LIBRTE_IEEE1588
mask |= PKT_TX_IEEE1588_TMST;
@@ -1165,6 +1172,39 @@ i40e_calc_context_desc(uint64_t flags)
return 0;
}
+/* set i40e TSO context descriptor */
+static inline uint64_t
+i40e_set_tso_ctx(struct rte_mbuf *mbuf, union i40e_tx_offload tx_offload)
+{
+ uint64_t ctx_desc = 0;
+ uint32_t cd_cmd, hdr_len, cd_tso_len;
+
+ if (!tx_offload.l4_len) {
+ PMD_DRV_LOG(DEBUG, "L4 length set to 0");
+ return ctx_desc;
+ }
+
+ /**
+ * in case of tunneling packet, the outer_l2_len and
+ * outer_l3_len must be 0.
+ */
+ hdr_len = tx_offload.outer_l2_len +
+ tx_offload.outer_l3_len +
+ tx_offload.l2_len +
+ tx_offload.l3_len +
+ tx_offload.l4_len;
+
+ cd_cmd = I40E_TX_CTX_DESC_TSO;
+ cd_tso_len = mbuf->pkt_len - hdr_len;
+ ctx_desc |= ((uint64_t)cd_cmd << I40E_TXD_CTX_QW1_CMD_SHIFT) |
+ ((uint64_t)cd_tso_len <<
+ I40E_TXD_CTX_QW1_TSO_LEN_SHIFT) |
+ ((uint64_t)mbuf->tso_segsz <<
+ I40E_TXD_CTX_QW1_MSS_SHIFT);
+
+ return ctx_desc;
+}
+
uint16_t
i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
{
@@ -1214,6 +1254,8 @@ i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
tx_offload.l3_len = tx_pkt->l3_len;
tx_offload.outer_l2_len = tx_pkt->outer_l2_len;
tx_offload.outer_l3_len = tx_pkt->outer_l3_len;
+ tx_offload.l4_len = tx_pkt->l4_len;
+ tx_offload.tso_segsz = tx_pkt->tso_segsz;
/* Calculate the number of context descriptors needed. */
nb_ctx = i40e_calc_context_desc(ol_flags);
@@ -1282,12 +1324,20 @@ i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
rte_pktmbuf_free_seg(txe->mbuf);
txe->mbuf = NULL;
}
-#ifdef RTE_LIBRTE_IEEE1588
- if (ol_flags & PKT_TX_IEEE1588_TMST)
+
+ /* TSO enabled means no timestamp */
+ if (ol_flags & PKT_TX_TCP_SEG)
cd_type_cmd_tso_mss |=
- ((uint64_t)I40E_TX_CTX_DESC_TSYN <<
- I40E_TXD_CTX_QW1_CMD_SHIFT);
+ i40e_set_tso_ctx(tx_pkt, tx_offload);
+ else {
+#ifdef RTE_LIBRTE_IEEE1588
+ if (ol_flags & PKT_TX_IEEE1588_TMST)
+ cd_type_cmd_tso_mss |=
+ ((uint64_t)I40E_TX_CTX_DESC_TSYN <<
+ I40E_TXD_CTX_QW1_CMD_SHIFT);
#endif
+ }
+
ctx_txd->tunneling_params =
rte_cpu_to_le_32(cd_tunneling_params);
ctx_txd->l2tag2 = rte_cpu_to_le_16(cd_l2tag2);
@@ -160,6 +160,8 @@ union i40e_tx_offload {
struct {
uint64_t l2_len:7; /**< L2 (MAC) Header Length. */
uint64_t l3_len:9; /**< L3 (IP) Header Length. */
+ uint64_t l4_len:8; /**< L4 Header Length. */
+ uint64_t tso_segsz:16; /**< TCP TSO segment size */
uint64_t outer_l2_len:8; /**< outer L2 Header Length */
uint64_t outer_l3_len:16; /**< outer L3 Header Length */
};