Hello Kelvin. On 10/24/2011 12:36 PM, Kelvin Cheung wrote: [snip] > According to datasheet of Loongson 1B, the buffer size in RX/TX > descriptor is only 2KB. So the Loongson1B's GMAC could not handle > jumbo frames. And the second buffer is useless in this case. Am I > right? Is there a better way than ifdef CONFIG_MACH_LOONGSON1 to > avoid duplicate code? Sorry for my misunderstanding. I think you have to use the normal descriptor and remove the enh_desc from the platform w/o modifying the driver at all. The driver will be able to select/configure all automatically (also jumbo). Let me know. Note: IIRC, there is a bit difference in case of normal descriptors for Synopsys databook newer than the 1.91 (I used for testing this mode). In any case, I remember that, on some platforms, the normal descriptors have been used w/o problems also on these new chip generations. Peppe
