netdev - Re: [PATCH v3 net-next 1/9] net: stmmac: Add XGMAC 2.10 HWIF entry

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Date:   Fri, 3 Aug 2018 11:54:18 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Jose Abreu <Jose.Abreu@...opsys.com>, netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>
Subject: Re: [PATCH v3 net-next 1/9] net: stmmac: Add XGMAC 2.10 HWIF entry

On 08/03/2018 08:50 AM, Jose Abreu wrote:
> Add a new entry to HWIF table for XGMAC 2.10. For now we fill it with
> empty callbacks which will be added in posterior patches.
> 
> Signed-off-by: Jose Abreu <joabreu@...opsys.com>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: Joao Pinto <jpinto@...opsys.com>
> Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
> Cc: Alexandre Torgue <alexandre.torgue@...com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/common.h | 14 +++++++------
>  drivers/net/ethernet/stmicro/stmmac/hwif.c   | 31 ++++++++++++++++++++++++++--
>  include/linux/stmmac.h                       |  1 +
>  3 files changed, 38 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
> index 78fd0f8b8e81..3fb81acbd274 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/common.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/common.h
> @@ -36,12 +36,14 @@
>  #include "mmc.h"
>  
>  /* Synopsys Core versions */
> -#define	DWMAC_CORE_3_40	0x34
> -#define	DWMAC_CORE_3_50	0x35
> -#define	DWMAC_CORE_4_00	0x40
> -#define DWMAC_CORE_4_10	0x41
> -#define DWMAC_CORE_5_00 0x50
> -#define DWMAC_CORE_5_10 0x51
> +#define	DWMAC_CORE_3_40		0x34
> +#define	DWMAC_CORE_3_50		0x35
> +#define	DWMAC_CORE_4_00		0x40
> +#define DWMAC_CORE_4_10		0x41
> +#define DWMAC_CORE_5_00		0x50
> +#define DWMAC_CORE_5_10		0x51
> +#define DWXGMAC_CORE_2_10	0x21
> +
>  #define STMMAC_CHAN0	0	/* Always supported and default for all chips */
>  
>  /* These need to be power of two, and >= 4 */
> diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.c b/drivers/net/ethernet/stmicro/stmmac/hwif.c
> index 1f50e83cafb2..24f5ff175aa4 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/hwif.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.c
> @@ -72,6 +72,7 @@ static int stmmac_dwmac4_quirks(struct stmmac_priv *priv)
>  static const struct stmmac_hwif_entry {
>  	bool gmac;
>  	bool gmac4;
> +	bool xgmac;
>  	u32 min_id;
>  	const struct stmmac_regs_off regs;
>  	const void *desc;
> @@ -87,6 +88,7 @@ static const struct stmmac_hwif_entry {
>  	{
>  		.gmac = false,
>  		.gmac4 = false,
> +		.xgmac = false,

In a future clean-up you would like want to remove this and replace this
an enumeration which is less error prone than having to define a boolean
for each of these previous generations only to say "this is not an xgmac".
-- 
Florian