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| /freebsd-10-stable/sys/dev/bfe/ | ||
| H A D | if_bfe.c | diff 159013 Sun May 28 16:41:47 MDT 2006 silby 1. Make sure that the TX and RX descriptor rings are 4096 byte aligned. Also use BUS_DMA_ALLOCNOW to be on the safe side. 2. Look for the Descriptor Error, and Descriptor Protocol Error flags from the card, and down the interface if we detect either. #1 (along with fixes to busdma) makes sure that this card works in all memory situations. Prior to this change, it was just luck that 512 count RX/TX lists were properly aligned. Now we can use any size of RX/TX lists and still have them properly aligned. #2 ensures that we don't get into an endless interrupt storm if busdma fails us. Descriptor Protocol Error would occur if we misaligned the TX/RX rings, and Descriptor Error would occur if we tried to give the card descriptors or rings with addresses > 1G. Trying to reinitialize the card isn't going to fix these errors, hence we don't try. |
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