Subject: Re: [PATCH net-next] net: hns: bug fix about hisilicon TSO BD mode

From: Andy Shevchenko <[email-masked]>
Date: Mon, 18 Jan 2016 11:36:32 +0200

On Mon, 2016-01-18 at 17:24 +0800, Daode Huang wrote:
> The current upstreaming code fails to set the tso_mode register
> when initilizes, when processes large size packets, the default 4 bd
> is
> not enough, so this patch initilizes it and set the default value to
> 8 bds

Please, next time try to thin out the Cc list. I have no intention to
be in it.

> 
> Signed-off-by: Daode Huang <[email-masked]>
> ---
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c | 13 +++++++++++--
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h |  3 +++
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h |  5 +++++
>  3 files changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
> b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
> index d2263c7..1218880 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
> @@ -369,8 +369,17 @@ int hns_rcb_common_init_hw(struct rcb_common_cb
> *rcb_common)
>  	dsaf_write_dev(rcb_common, RCB_COM_CFG_ENDIAN_REG,
>  		       HNS_RCB_COMMON_ENDIAN);
>  
> -	dsaf_write_dev(rcb_common, RCB_COM_CFG_FNA_REG, 0x0);
> -	dsaf_write_dev(rcb_common, RCB_COM_CFG_FA_REG, 0x1);
> +	if (AE_IS_VER1(rcb_common->dsaf_dev->dsaf_ver)) {
> +		dsaf_write_dev(rcb_common, RCB_COM_CFG_FNA_REG,
> 0x0);
> +		dsaf_write_dev(rcb_common, RCB_COM_CFG_FA_REG, 0x1);
> +	} else {
> +		dsaf_set_dev_bit(rcb_common, RCBV2_COM_CFG_USER_REG,
> +				 RCB_COM_CFG_FNA_B, false);
> +		dsaf_set_dev_bit(rcb_common, RCBV2_COM_CFG_USER_REG,
> +				 RCB_COM_CFG_FA_B, true);
> +		dsaf_set_dev_bit(rcb_common,
> RCBV2_COM_CFG_TSO_MODE_REG,
> +				 RCB_COM_TSO_MODE_B,
> HNS_TSO_MODE_8BD_32K);
> +	}
>  
>  	return 0;
>  }
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
> b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
> index 29041b1..81fe9f8 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.h
> @@ -54,6 +54,9 @@ struct rcb_common_cb;
>  #define HNS_DUMP_REG_NUM			500
>  #define HNS_STATIC_REG_NUM			12
>  
> +#define HNS_TSO_MODE_8BD_32K			1
> +#define HNS_TSO_MDOE_4BD_16K			0

Typo: MDOE

> +
>  enum rcb_int_flag {
>  	RCB_INT_FLAG_TX = 0x1,
>  	RCB_INT_FLAG_RX = (0x1 << 1),
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
> b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
> index 5d1b746..f0c4f9b 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
> @@ -363,6 +363,8 @@
>  #define RCB_COM_CFG_FA_REG			0x3C
>  #define RCB_COM_CFG_PKT_TC_BP_REG		0x40
>  #define RCB_COM_CFG_PPE_TNL_CLKEN_REG		0x44
> +#define RCBV2_COM_CFG_USER_REG			0x30
> +#define RCBV2_COM_CFG_TSO_MODE_REG		0x50
>  
>  #define RCB_COM_INTMSK_TX_PKT_REG		0x3A0
>  #define RCB_COM_RINT_TX_PKT_REG			0x3A8
> @@ -860,6 +862,9 @@
>  
>  #define PPE_COMMON_CNT_CLR_CE_B	0
>  #define PPE_COMMON_CNT_CLR_SNAP_EN_B	1
> +#define RCB_COM_TSO_MODE_B	0
> +#define RCB_COM_CFG_FNA_B	1
> +#define RCB_COM_CFG_FA_B	0
>  
>  #define GMAC_DUPLEX_TYPE_B 0
>  

-- 
Andy Shevchenko <[email-masked]>
Intel Finland Oy