diff options
Diffstat (limited to 'sys/dev/cxgbe/tom/t4_ddp.c')
| -rw-r--r-- | sys/dev/cxgbe/tom/t4_ddp.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/dev/cxgbe/tom/t4_ddp.c b/sys/dev/cxgbe/tom/t4_ddp.c index 7cbb2639e9da..244287fcb3aa 100644 --- a/sys/dev/cxgbe/tom/t4_ddp.c +++ b/sys/dev/cxgbe/tom/t4_ddp.c @@ -405,6 +405,19 @@ handle_ddp_data(struct toepcb *toep, __be32 ddp_report, __be32 rcv_nxt, int len) } tp = intotcpcb(inp); + + /* + * For RX_DDP_COMPLETE, len will be zero and rcv_nxt is the + * sequence number of the next byte to receive. The length of + * the data received for this message must be computed by + * comparing the new and old values of rcv_nxt. + * + * For RX_DATA_DDP, len might be non-zero, but it is only the + * length of the most recent DMA. It does not include the + * total length of the data received since the previous update + * for this DDP buffer. rcv_nxt is the sequence number of the + * first received byte from the most recent DMA. + */ len += be32toh(rcv_nxt) - tp->rcv_nxt; tp->rcv_nxt += len; tp->t_rcvtime = ticks; |