From: Nithin Dabilpuram Date: Wed, 28 Oct 2020 11:46:43 +0000 (+0530) Subject: net/octeontx2: avoid per packet barrier with multi segment X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=364eb0e46683;p=dpdk.git net/octeontx2: avoid per packet barrier with multi segment Avoid per-pkt barrier with multi-seg with fast free and remove mbuf update to NULL. Fixes: ce8628c66a22 ("net/octeontx2: fix jumbo frame crash") Cc: stable@dpdk.org Signed-off-by: Nithin Dabilpuram Signed-off-by: Jerin Jacob --- diff --git a/drivers/event/octeontx2/otx2_worker.h b/drivers/event/octeontx2/otx2_worker.h index 4501f4e0e7..3efd3ba97f 100644 --- a/drivers/event/octeontx2/otx2_worker.h +++ b/drivers/event/octeontx2/otx2_worker.h @@ -288,18 +288,12 @@ otx2_ssogws_event_tx(struct otx2_ssogws *ws, struct rte_event ev[], /* Perform header writes before barrier for TSO */ otx2_nix_xmit_prepare_tso(m, flags); - /* Lets commit any changes in the packet here in case of single seg as - * no further changes to mbuf will be done. - * While for multi seg all mbufs used are set to NULL in - * otx2_nix_prepare_mseg() after preparing the sg list and these changes - * should be committed before LMTST. - * Also in no fast free case some mbuf fields are updated in - * otx2_nix_prefree_seg - * Hence otx2_nix_xmit_submit_lmt_release/otx2_nix_xmit_mseg_one_release - * has store barrier for multiseg. + /* Lets commit any changes in the packet here in case when + * fast free is set as no further changes will be made to mbuf. + * In case of fast free is not set, both otx2_nix_prepare_mseg() + * and otx2_nix_xmit_prepare() has a barrier after refcnt update. */ - if (!(flags & NIX_TX_MULTI_SEG_F) && - !(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F)) + if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F)) rte_io_wmb(); txq = otx2_ssogws_xtract_meta(m, txq_data); otx2_ssogws_prepare_pkt(txq, m, cmd, flags); @@ -311,12 +305,12 @@ otx2_ssogws_event_tx(struct otx2_ssogws *ws, struct rte_event ev[], if (!ev->sched_type) { otx2_nix_xmit_mseg_prep_lmt(cmd, txq->lmt_addr, segdw); otx2_ssogws_head_wait(ws); - if (otx2_nix_xmit_submit_lmt_release(txq->io_addr) == 0) + if (otx2_nix_xmit_submit_lmt(txq->io_addr) == 0) otx2_nix_xmit_mseg_one(cmd, txq->lmt_addr, txq->io_addr, segdw); } else { - otx2_nix_xmit_mseg_one_release(cmd, txq->lmt_addr, - txq->io_addr, segdw); + otx2_nix_xmit_mseg_one(cmd, txq->lmt_addr, + txq->io_addr, segdw); } } else { /* Passing no of segdw as 4: HDR + EXT + SG + SMEM */ diff --git a/drivers/net/octeontx2/otx2_tx.c b/drivers/net/octeontx2/otx2_tx.c index 4458d8bca7..439c46f61c 100644 --- a/drivers/net/octeontx2/otx2_tx.c +++ b/drivers/net/octeontx2/otx2_tx.c @@ -77,11 +77,15 @@ nix_xmit_pkts_mseg(void *tx_queue, struct rte_mbuf **tx_pkts, otx2_nix_xmit_prepare_tso(tx_pkts[i], flags); } + /* Lets commit any changes in the packet here as no further changes + * to the packet will be done unless no fast free is enabled. + */ + if (!(flags & NIX_TX_OFFLOAD_MBUF_NOFF_F)) + rte_io_wmb(); + for (i = 0; i < pkts; i++) { otx2_nix_xmit_prepare(tx_pkts[i], cmd, flags); segdw = otx2_nix_prepare_mseg(tx_pkts[i], cmd, flags); - /* Lets commit any changes in the packet */ - rte_io_wmb(); otx2_nix_xmit_prepare_tstamp(cmd, &txq->cmd[0], tx_pkts[i]->ol_flags, segdw, flags); diff --git a/drivers/net/octeontx2/otx2_tx.h b/drivers/net/octeontx2/otx2_tx.h index d6ea3b4874..a97b160677 100644 --- a/drivers/net/octeontx2/otx2_tx.h +++ b/drivers/net/octeontx2/otx2_tx.h @@ -440,13 +440,17 @@ otx2_nix_prepare_mseg(struct rte_mbuf *m, uint64_t *cmd, const uint16_t flags) sg_u = sg_u | ((uint64_t)m->data_len << (i << 4)); *slist = rte_mbuf_data_iova(m); /* Set invert df if buffer is not to be freed by H/W */ - if (flags & NIX_TX_OFFLOAD_MBUF_NOFF_F) + if (flags & NIX_TX_OFFLOAD_MBUF_NOFF_F) { sg_u |= (otx2_nix_prefree_seg(m) << (i + 55)); + /* Commit changes to mbuf */ + rte_io_wmb(); + } /* Mark mempool object as "put" since it is freed by NIX */ - if (!(sg_u & (1ULL << (i + 55)))) { - m->next = NULL; +#ifdef RTE_LIBRTE_MEMPOOL_DEBUG + if (!(sg_u & (1ULL << (i + 55)))) __mempool_check_cookies(m->pool, (void **)&m, 1, 0); - } + rte_io_wmb(); +#endif slist++; i++; nb_segs--;