linux-kernel - Re: [PATCH v3 1/7] e1000e: fix S0ix flow to allow S0i3.2 subset entry

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Date:   Tue, 8 Dec 2020 11:24:17 -0600
From:   Mario Limonciello <Mario.Limonciello@...l.com>
To:     Mario Limonciello <mario.limonciello@...l.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        intel-wired-lan@...ts.osuosl.org,
        David Miller <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org, Linux PM <linux-pm@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>,
        Alexander Duyck <alexander.duyck@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Netfin <sasha.neftin@...el.com>,
        Aaron Brown <aaron.f.brown@...el.com>,
        Stefan Assmann <sassmann@...hat.com>, darcari@...hat.com,
        Yijun.Shen@...l.com, Perry.Yuan@...l.com,
        anthony.wong@...onical.com,
        Vitaly Lifshits <vitaly.lifshits@...el.com>
Subject: Re: [PATCH v3 1/7] e1000e: fix S0ix flow to allow S0i3.2 subset entry


On 12/4/20 2:09 PM, Mario Limonciello wrote:
> From: Vitaly Lifshits <vitaly.lifshits@...el.com>
>
> Changed a configuration in the flows to align with
> architecture requirements to achieve S0i3.2 substate.
>
> Also fixed a typo in the previous commit 632fbd5eb5b0
> ("e1000e: fix S0ix flows for cable connected case").
>
> Signed-off-by: Vitaly Lifshits <vitaly.lifshits@...el.com>
> Tested-by: Aaron Brown <aaron.f.brown@...el.com>
> Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
> ---
>   drivers/net/ethernet/intel/e1000e/netdev.c | 8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)

I realize that the series is still under discussion, but I intentionally 
moved this
patch to the front of the series so it can be pulled in even if the 
others are still
discussed.

@David Miller:
This particular patch is more important than the rest.  It actually 
fixes issues
on the non-ME i219V as well.  Can this one be queued up and we can keep
discussing the rest?

> diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
> index b30f00891c03..128ab6898070 100644
> --- a/drivers/net/ethernet/intel/e1000e/netdev.c
> +++ b/drivers/net/ethernet/intel/e1000e/netdev.c
> @@ -6475,13 +6475,13 @@ static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter)
>   
>   	/* Ungate PGCB clock */
>   	mac_data = er32(FEXTNVM9);
> -	mac_data |= BIT(28);
> +	mac_data &= ~BIT(28);
>   	ew32(FEXTNVM9, mac_data);
>   
>   	/* Enable K1 off to enable mPHY Power Gating */
>   	mac_data = er32(FEXTNVM6);
>   	mac_data |= BIT(31);
> -	ew32(FEXTNVM12, mac_data);
> +	ew32(FEXTNVM6, mac_data);
>   
>   	/* Enable mPHY power gating for any link and speed */
>   	mac_data = er32(FEXTNVM8);
> @@ -6525,11 +6525,11 @@ static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter)
>   	/* Disable K1 off */
>   	mac_data = er32(FEXTNVM6);
>   	mac_data &= ~BIT(31);
> -	ew32(FEXTNVM12, mac_data);
> +	ew32(FEXTNVM6, mac_data);
>   
>   	/* Disable Ungate PGCB clock */
>   	mac_data = er32(FEXTNVM9);
> -	mac_data &= ~BIT(28);
> +	mac_data |= BIT(28);
>   	ew32(FEXTNVM9, mac_data);
>   
>   	/* Cancel not waking from dynamic
-- 
*Mario Limonciello*
*Dell*| CPG Software Engineering
*office*+1 512 723 0582