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Message-ID: <83f2dba6-1aec-4088-b1e0-e417b14fedb0@loongson.cn>
Date: Wed, 24 Jan 2024 18:54:55 +0800
From: Yanteng Si <siyanteng@...ngson.cn>
To: Serge Semin <fancer.lancer@...il.com>
Cc: andrew@...n.ch, hkallweit1@...il.com, peppe.cavallaro@...com,
alexandre.torgue@...s.st.com, joabreu@...opsys.com, Jose.Abreu@...opsys.com,
chenhuacai@...ngson.cn, linux@...linux.org.uk, guyinggang@...ngson.cn,
netdev@...r.kernel.org, chris.chenfeiyang@...il.com
Subject: Re: [PATCH net-next v7 8/9] net: stmmac: dwmac-loongson: Disable flow
control for GMAC
在 2023/12/21 10:35, Serge Semin 写道:
> On Tue, Dec 19, 2023 at 10:28:18PM +0800, Yanteng Si wrote:
>> Loongson GMAC does not support Flow Control feature. Set flags to
>> disable it.
>>
>> Signed-off-by: Yanteng Si <siyanteng@...ngson.cn>
>> Signed-off-by: Feiyang Chen <chenfeiyang@...ngson.cn>
>> Signed-off-by: Yinggang Gu <guyinggang@...ngson.cn>
>> ---
>> drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c | 2 ++
>> drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 +++---
>> include/linux/stmmac.h | 1 +
>> 3 files changed, 6 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
>> index 9e4953c7e4e0..77c9bcb66a8e 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
>> @@ -160,6 +160,8 @@ static int loongson_gmac_config(struct pci_dev *pdev,
>> break;
>> }
>>
>> + plat->flags |= FIELD_PREP(STMMAC_FLAG_DISABLE_FLOW_CONTROL, 1);
> Why FIELD_PREP()-ing?
This is very early code and will be changed to:
plat->flags |= STMMAC_FLAG_DISABLE_FLOW_CONTROL;
>
>> +
>> return ret;
>> }
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> index 9764d2ab7e46..d94f61742772 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>> @@ -1236,9 +1236,9 @@ static int stmmac_phy_setup(struct stmmac_priv *priv)
>> xpcs_get_interfaces(priv->hw->xpcs,
>> priv->phylink_config.supported_interfaces);
>>
>> - priv->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
>> - MAC_10FD | MAC_100FD |
>> - MAC_1000FD;
>> + priv->phylink_config.mac_capabilities = MAC_10FD | MAC_100FD | MAC_1000FD;
>> + if (!FIELD_GET(STMMAC_FLAG_DISABLE_FLOW_CONTROL, priv->plat->flags))
> !(priv->plat->flags & STMMAC_FLAG_DISABLE_FLOW_CONTROL) ?
OK!
Thanks,
Yanteng
>
> -Serge(y)
>
>> + priv->phylink_config.mac_capabilities |= MAC_ASYM_PAUSE | MAC_SYM_PAUSE;
>>
>> stmmac_set_half_duplex(priv);
>>
>> diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
>> index 067030cdb60f..5ece92e4d8c3 100644
>> --- a/include/linux/stmmac.h
>> +++ b/include/linux/stmmac.h
>> @@ -224,6 +224,7 @@ struct dwmac4_addrs {
>> #define STMMAC_FLAG_HAS_LGMAC BIT(13)
>> #define STMMAC_FLAG_DISABLE_HALF_DUPLEX BIT(14)
>> #define STMMAC_FLAG_DISABLE_FORCE_1000 BIT(15)
>> +#define STMMAC_FLAG_DISABLE_FLOW_CONTROL BIT(16)
>>
>> struct plat_stmmacenet_data {
>> int bus_id;
>> --
>> 2.31.4
>>
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