Messages in this thread | | | Date | Thu, 18 Sep 2003 21:54:49 -0400 | From | Stevie-O <> | Subject | vmalloc and DMA |
| |
I need to treat a large number of pages (about 128) as continuous. However, I need to DMA to that memory from a device. The device has a built-in scatter-gather feature, so I don't need to worry about whether the pages are physically contiguous. Looking through LXR revealed a function called vmalloc_32. My questions are these:
(1) Is vmalloc_32 going to stick around for a while? (2) Is it appropriate to vmalloc_32(512<<10) and then grab the underlying addresses for DMA? (3) If it *is* appropriate, what's the proper way to get to those underlying addresses? I saw a virt_to_page macro somewhere...
-- - Stevie-O
Real Programmers use COPY CON PROGRAM.EXE
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |