From: Yuhailong <[email protected]> This patch borrows i40 patch: commit 65b2ec7b4f6b ("net/i40e: fix descriptor scan on Arm")
For Arm platforms, reading descs can get re-ordered, then the status of DD bits will be discontinuous, so add the logic to only process continuous descs by checking DD bits. Cc: Joyce Kong <[email protected]> Cc: Ruifeng Wang <[email protected]> Signed-off-by: Yuhailong <[email protected]> Signed-off-by: Jianhua Xie <[email protected]> --- drivers/net/intel/ice/ice_rxtx.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/net/intel/ice/ice_rxtx.c b/drivers/net/intel/ice/ice_rxtx.c index 74db0fbec9..b9358e49ba 100644 --- a/drivers/net/intel/ice/ice_rxtx.c +++ b/drivers/net/intel/ice/ice_rxtx.c @@ -1888,7 +1888,7 @@ ice_rx_scan_hw_ring(struct ci_rx_queue *rxq) struct rte_mbuf *mb; uint16_t stat_err0; uint16_t pkt_len, hdr_len; - int32_t s[ICE_LOOK_AHEAD], nb_dd; + int32_t s[ICE_LOOK_AHEAD], nb_dd, var = 0; int32_t i, j, nb_rx = 0; uint64_t pkt_flags = 0; uint32_t *ptype_tbl = rxq->ice_vsi->adapter->ptype_tbl; @@ -1930,8 +1930,18 @@ ice_rx_scan_hw_ring(struct ci_rx_queue *rxq) rte_smp_rmb(); /* Compute how many status bits were set */ - for (j = 0, nb_dd = 0; j < ICE_LOOK_AHEAD; j++) - nb_dd += s[j] & (1 << ICE_RX_FLEX_DESC_STATUS0_DD_S); + for (j = 0, nb_dd = 0; j < ICE_LOOK_AHEAD; j++) { + var = s[j] & (1 << ICE_RX_FLEX_DESC_STATUS0_DD_S); +#ifdef RTE_ARCH_ARM + /* For Arm platforms, only compute continuous status bits */ + if (var) + nb_dd += 1; + else + break; +#else + nb_dd += var; +#endif + } nb_rx += nb_dd; -- 2.30.2
