[PATCH rtems-libbsd 1/2] if_ffec: Reduce buffer size

[Christian MAUDERER]

Hello Gedare,

Am 01.06.22 um 14:46 schrieb Gedare Bloom:
> On Mon, May 23, 2022 at 6:21 AM Christian Mauderer
> <christian.mauderer at embedded-brains.de> wrote:
>>
>> Typical embedded systems don't have that much memory. Reduce the buffer
>> size to something more sensible for the usual type of application.
>> ---
>>   freebsd/sys/dev/ffec/if_ffec.c | 8 ++++++++
>>   1 file changed, 8 insertions(+)
>>
>> diff --git a/freebsd/sys/dev/ffec/if_ffec.c b/freebsd/sys/dev/ffec/if_ffec.c
>> index 47c0f770..4c1e147b 100644
>> --- a/freebsd/sys/dev/ffec/if_ffec.c
>> +++ b/freebsd/sys/dev/ffec/if_ffec.c
>> @@ -139,9 +139,17 @@ static struct ofw_compat_data compat_data[] = {
>>   /*
>>    * Driver data and defines.  The descriptor counts must be a power of two.
>>    */
>> +#ifndef __rtems__
>>   #define        RX_DESC_COUNT   512
>> +#else /* __rtems__ */
>> +#define        RX_DESC_COUNT   64
>> +#endif /* __rtems__ */
> 
> Do we need some way to control this parameter? Or, how will this
> appear if it breaks something?

I don't expect that there will be any problems. But I can take a look 
how I can make that a parameter.

Best regards

Christian

> 
>>   #define        RX_DESC_SIZE    (sizeof(struct ffec_hwdesc) * RX_DESC_COUNT)
>> +#ifndef __rtems__
>>   #define        TX_DESC_COUNT   512
>> +#else /* __rtems__ */
>> +#define        TX_DESC_COUNT   64
>> +#endif /* __rtems__ */
>>   #define        TX_DESC_SIZE    (sizeof(struct ffec_hwdesc) * TX_DESC_COUNT)
>>   #define        TX_MAX_DMA_SEGS 8
>>
>> --
>> 2.35.3
>>
>> _______________________________________________
>> devel mailing list
>> devel at rtems.org
>> http://lists.rtems.org/mailman/listinfo/devel

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