On Mon, Aug 30, 2021 at 10:00 PM Ashwin Sekhar T K <asek...@marvell.com> wrote:
>
> Avoid using stashing option of stype in NPA in cn10k-a0 stepping.
>
> This is a workaround for a HW Errata due to which NPA stashing operations
> will never result in writing the data into L2 cache. But instead, it will
> be written into LLC.
>
> Signed-off-by: Ashwin Sekhar T K <asek...@marvell.com>
Acked-by: Jerin Jacob <jer...@marvell.com>
> ---
> drivers/common/cnxk/roc_nix_queue.c | 4 ++++
> drivers/common/cnxk/roc_nix_tm_ops.c | 7 +++++++
> drivers/common/cnxk/roc_npa.h | 2 +-
> 3 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/common/cnxk/roc_nix_queue.c
> b/drivers/common/cnxk/roc_nix_queue.c
> index 7e2f86eca7..76e439e7a9 100644
> --- a/drivers/common/cnxk/roc_nix_queue.c
> +++ b/drivers/common/cnxk/roc_nix_queue.c
> @@ -585,6 +585,10 @@ sqb_pool_populate(struct roc_nix *roc_nix, struct
> roc_nix_sq *sq)
>
> memset(&aura, 0, sizeof(aura));
> aura.fc_ena = 1;
> + if (roc_model_is_cn9k() || roc_model_is_cn10ka_a0())
> + aura.fc_stype = 0x0; /* STF */
> + else
> + aura.fc_stype = 0x3; /* STSTP */
> aura.fc_addr = (uint64_t)sq->fc;
> aura.fc_hyst_bits = 0; /* Store count on all updates */
> rc = roc_npa_pool_create(&sq->aura_handle, blk_sz, NIX_MAX_SQB, &aura,
> diff --git a/drivers/common/cnxk/roc_nix_tm_ops.c
> b/drivers/common/cnxk/roc_nix_tm_ops.c
> index ed244d4214..f2173c9a58 100644
> --- a/drivers/common/cnxk/roc_nix_tm_ops.c
> +++ b/drivers/common/cnxk/roc_nix_tm_ops.c
> @@ -38,6 +38,13 @@ roc_nix_tm_sq_aura_fc(struct roc_nix_sq *sq, bool enable)
>
> req->aura.fc_ena = enable;
> req->aura_mask.fc_ena = 1;
> + if (roc_model_is_cn9k() || roc_model_is_cn10ka_a0()) {
> + req->aura.fc_stype = 0x0; /* STF */
> + req->aura_mask.fc_stype = 0x0; /* STF */
> + } else {
> + req->aura.fc_stype = 0x3; /* STSTP */
> + req->aura_mask.fc_stype = 0x3; /* STSTP */
> + }
>
> rc = mbox_process(mbox);
> if (rc)
> diff --git a/drivers/common/cnxk/roc_npa.h b/drivers/common/cnxk/roc_npa.h
> index 3fc6192e57..1cf50e5c4e 100644
> --- a/drivers/common/cnxk/roc_npa.h
> +++ b/drivers/common/cnxk/roc_npa.h
> @@ -214,7 +214,7 @@ roc_npa_aura_batch_alloc_issue(uint64_t aura_handle,
> uint64_t *buf,
> cmp.u = 0;
> cmp.compare_s.aura = roc_npa_aura_handle_to_aura(aura_handle);
> cmp.compare_s.drop = drop;
> - cmp.compare_s.stype = ALLOC_STYPE_STSTP;
> + cmp.compare_s.stype = ALLOC_STYPE_STF;
> cmp.compare_s.dis_wait = dis_wait;
> cmp.compare_s.count = num;
>
> --
> 2.32.0
>
