From 590873482f9b6a5e2635a95720acb37b5f516ab0 Mon Sep 17 00:00:00 2001
From: kircher <[email protected]>
Date: Tue, 21 Feb 2023 15:05:41 +0800
Subject: [PATCH] lwip add need_tso_send

---
 src/api/api_msg.c      | 1 +
 src/core/tcp_out.c     | 5 ++++-
 src/include/lwip/tcp.h | 2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/api/api_msg.c b/src/api/api_msg.c
index 1fedaad..3a4a473 100644
--- a/src/api/api_msg.c
+++ b/src/api/api_msg.c
@@ -1744,6 +1744,7 @@ lwip_netconn_do_writemore(struct netconn *conn  WRITE_DELAYED_PARAM)
       write_more = 0;
       err = tcp_write(conn->pcb.tcp, conn->current_msg->msg.w.vector->ptr, len, apiflags);
       conn->current_msg->msg.w.len = len;
+      conn->pcb.tcp->need_tso_send = 1;
 #else
       err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags);
 #endif
diff --git a/src/core/tcp_out.c b/src/core/tcp_out.c
index c538f2a..bf23381 100644
--- a/src/core/tcp_out.c
+++ b/src/core/tcp_out.c
@@ -1473,7 +1473,7 @@ tcp_output(struct tcp_pcb *pcb)
 
   u32_t send_len = 0;
 #if USE_LIBOS
-  if (get_eth_params_tx_ol() & DEV_TX_OFFLOAD_TCP_TSO) {
+  if ((get_eth_params_tx_ol() & DEV_TX_OFFLOAD_TCP_TSO) && pcb->need_tso_send) {
     while(seg && send_len < 0xffff) {
       /**
        * 1) walk unsent queue, find all seg witch wait to send. chain buf in these segs.
@@ -1529,6 +1529,7 @@ tcp_output(struct tcp_pcb *pcb)
         if (err != ERR_OK) {
           if (pcb->unsent == NULL)
             pcb->last_unsent = NULL;
+	  pcb->need_tso_send = 0;
           return err;
         }
         pcb->unsent = seg->next;
@@ -1552,6 +1553,7 @@ tcp_output(struct tcp_pcb *pcb)
       pbuf_remove_header(new_seg.p, new_seg.p->tot_len - new_seg.len - TCPH_HDRLEN_BYTES(new_seg.tcphdr));
       new_seg.p->tot_len = new_seg.p->len;
     }
+  pcb->need_tso_send = 0;
   } else
 #endif
 {
@@ -1647,6 +1649,7 @@ tcp_output(struct tcp_pcb *pcb)
 #endif /* TCP_OVERSIZE */
 
 output_done:
+  pcb->need_tso_send = 0;
   if (pcb->unsent == NULL)
     pcb->last_unsent = NULL;
   tcp_clear_flags(pcb, TF_NAGLEMEMERR);
diff --git a/src/include/lwip/tcp.h b/src/include/lwip/tcp.h
index 0b65b01..2fc683d 100644
--- a/src/include/lwip/tcp.h
+++ b/src/include/lwip/tcp.h
@@ -409,6 +409,8 @@ struct tcp_pcb {
   u8_t snd_scale;
   u8_t rcv_scale;
 #endif
+
+  u8_t need_tso_send;
 };
 
 #if TCP_PCB_HASH
-- 
2.33.0