> so I'm running: > > err = > bus_dmamem_alloc(ring->dma_tag, &ring->buf, > BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, &ring->dma_map); > > but after calling bus_dmamem_allloc the dma_map variable is still NULL. is > this OK?
Sure, you are allocating with BUS_DMA_NOWAIT. err is probably equal to ENOMEM. If allocation size is larger than a PAGE_SIZE or specific alignment is require then contigmalloc() is called to satisfy the allocation. contigmalloc() can fail even when specifying WAITOK. --Mark Tinguely. _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
