From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?Q?Micha=C5=82_Krawczyk?= <mk@semihalf.com>
Subject: Re: [PATCH v2 4/4] net/ena: enable WC
Date: Mon, 2 Jul 2018 08:52:46 +0200
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Cc: dev@dpdk.org, Marcin Wojtas <mw@semihalf.com>, "Tzalik,
 Guy" <gtzalik@amazon.com>,
 "Schmeilin, Evgeny" <evgenys@amazon.com>, "Matushevsky,
 Alexander" <matua@amazon.com>,
 "Chauskin, Igor" <igorch@amazon.com>, Thomas Monjalon <thomas@monjalon.net>,
 Ferruh Yigit <ferruh.yigit@intel.com>
To: Rafal Kozik <rk@semihalf.com>
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2018-06-28 15:15 GMT+02:00 Rafal Kozik <rk@semihalf.com>:
>
> Write combining (WC) increases NIC performance by making better
> utilization of PCI bus. ENA PMD may make usage of this feature.
>
> To enable it load igb_uio driver with wc_activate set to 1.
>
> Signed-off-by: Rafal Kozik <rk@semihalf.com>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Michal Krawczyk <mk@semihalf.com>
> ---
>  drivers/net/ena/ena_ethdev.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ena/ena_ethdev.c b/drivers/net/ena/ena_ethdev.c
> index 9ae73e3..1870edf 100644
> --- a/drivers/net/ena/ena_ethdev.c
> +++ b/drivers/net/ena/ena_ethdev.c
> @@ -2210,7 +2210,8 @@ static int eth_ena_pci_remove(struct rte_pci_device *pci_dev)
>
>  static struct rte_pci_driver rte_ena_pmd = {
>         .id_table = pci_id_ena_map,
> -       .drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC,
> +       .drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_INTR_LSC |
> +                    RTE_PCI_DRV_WC_ACTIVATE,
>         .probe = eth_ena_pci_probe,
>         .remove = eth_ena_pci_remove,
>  };
> --
> 2.7.4
>