Re: [PATCH v2] event/cnxk: wait for CPT flow control on WQE path

[Jerin Jacob <jerinjacobk@gmail.com>]

On Tue, Jan 24, 2023 at 2:22 PM Jerin Jacob <jerinjacobk@gmail.com> wrote:
>
> On Thu, Jan 19, 2023 at 11:23 AM Rahul Bhansali <rbhansali@marvell.com> wrote:
> >
> > This is to avoid CPT queue overflow and thereby a CPT misc
> > interrupt.
> >
> > Fixes: 1a7da795f64 ("net/cnxk: support Tx security offload on cn9k")
> >
> > Signed-off-by: Rahul Bhansali <rbhansali@marvell.com>
>
> Acked-by: Jerin Jacob <jerinj@marvell.com>

Applied to dpdk-next-net-eventdev/for-main. Thanks


>
>
> > ---
> > Changes in v2: Updated commit message.
> >
> >  drivers/event/cnxk/cn9k_worker.h |  1 +
> >  drivers/net/cnxk/cn9k_tx.h       | 10 ++++++++++
> >  2 files changed, 11 insertions(+)
> >
> > diff --git a/drivers/event/cnxk/cn9k_worker.h b/drivers/event/cnxk/cn9k_worker.h
> > index 54213db3b4..1ce4b044e8 100644
> > --- a/drivers/event/cnxk/cn9k_worker.h
> > +++ b/drivers/event/cnxk/cn9k_worker.h
> > @@ -730,6 +730,7 @@ cn9k_sso_hws_xmit_sec_one(const struct cn9k_eth_txq *txq, uint64_t base,
> >
> >         rte_io_wmb();
> >         cn9k_sso_txq_fc_wait(txq);
> > +       cn9k_nix_sec_fc_wait_one(txq);
> >
> >         /* Write CPT instruction to lmt line */
> >         vst1q_u64(lmt_addr, cmd01);
> > diff --git a/drivers/net/cnxk/cn9k_tx.h b/drivers/net/cnxk/cn9k_tx.h
> > index 17bbdce3a0..b4ef45d65c 100644
> > --- a/drivers/net/cnxk/cn9k_tx.h
> > +++ b/drivers/net/cnxk/cn9k_tx.h
> > @@ -411,6 +411,16 @@ cn9k_nix_xmit_prep_lmt(uint64_t *cmd, void *lmt_addr, const uint32_t flags)
> >         roc_lmt_mov(lmt_addr, cmd, cn9k_nix_tx_ext_subs(flags));
> >  }
> >
> > +static __rte_always_inline void
> > +cn9k_nix_sec_fc_wait_one(const struct cn9k_eth_txq *txq)
> > +{
> > +       uint64_t nb_desc = txq->cpt_desc;
> > +       uint64_t *fc = txq->cpt_fc;
> > +
> > +       while (nb_desc <= __atomic_load_n(fc, __ATOMIC_RELAXED))
> > +               ;
> > +}
> > +
> >  static __rte_always_inline uint64_t
> >  cn9k_nix_xmit_submit_lmt(const rte_iova_t io_addr)
> >  {
> > --
> > 2.25.1
> >