[U-Boot] [PATCH 1/6 v3] include: configs: ls1028a: set SYS_RX_ETH_BUFFER to 8

[Alex Marginean <alexm.osslist@gmail.com>]

Hi Bin,

On 7/1/2019 11:08 AM, Bin Meng wrote:
> Hi Alex,
> 
> On Thu, Jun 20, 2019 at 10:48 PM Alex Marginean
> <alexandru.marginean@nxp.com> wrote:
>>
>> LS1028A ethernet interfaces work with at least 8 BDs, set number of buffers
>> to match that.
>>
>> Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
>> ---
>>   include/configs/ls1028a_common.h | 4 ++++
>>   1 file changed, 4 insertions(+)
>>
>> diff --git a/include/configs/ls1028a_common.h b/include/configs/ls1028a_common.h
>> index 0db86396e9..f9d2602afd 100644
>> --- a/include/configs/ls1028a_common.h
>> +++ b/include/configs/ls1028a_common.h
>> @@ -197,4 +197,8 @@
>>   #define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS      3
>>   #define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS  5
>>
>> +/* Ethernet */
>> +/* smallest ENETC BD ring has 8 entries */
>> +#define CONFIG_SYS_RX_ETH_BUFFER               8
>> +
> 
> We should avoid adding more ad-hoc CONFIG_XXX macros. We should either
> make this a Kconfig option, or move this macro to the driver header
> file (eg: fsl_enetc.h) and do not prefix it with CONFIG_.
> If we move to driver header, this patch can be simply dropped as I see
> there are already macro defined in patch [2/6].

This is used in net.h to define PKTBUFSRX which is further used in net.c
to define net_pkt_buf.  I was actually planning to use net_pkt_buf
instead of allocation memory in the driver, that's why I used it.
I can use an enetc specific define, but then I either have to allocate
packet data in the driver or put more code in to only use up to 4
(default CONFIG_SYS_RX_ETH_BUFFER value) BDs in an 8 entry BDR.

Alex

> 
>>   #endif /* __L1028A_COMMON_H */
>> --
> 
> Regards,
> Bin
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