Messages in this thread | | | Date | Fri, 10 Oct 2008 11:40:51 +0900 | Subject | Re: [PATCH] pci: print out DMA mask info | From | FUJITA Tomonori <> |
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On Thu, 09 Oct 2008 14:27:33 -0700 Yinghai Lu <yinghai@kernel.org> wrote:
> Grant Grundler wrote: > > On Wed, Oct 08, 2008 at 04:02:23PM -0700, Yinghai Lu wrote: > >> so can find out what is DMA mask is used for pci devices in addition to > >> default setting. > > > > I like the idea. I don't like the additional boot time output. > > > > But I'm thinking this could be an option to lspci. > > lspci already knows about the /sys tree. Can PCI export the two masks > > (dma_mask and dma_consistent_mask) and something like "lspci -td" > > would dump those in a nice way? > > > in boot log, it could link with driver, pci info... > > > >> got: > >> aacraid 0000:86:00.0: using 32bit DMA mask > >> aacraid 0000:86:00.0: using 32bit consistent DMA mask > >> aacraid 0000:86:00.0: using 64bit DMA mask > >> aacraid 0000:86:00.0: using 64bit consistent DMA mask > > and aacraid do 32bit at first then 64bit... > > so put that in boot message could be useful too.
IIRC, aacraid uses 32bit dma_mask at startup then it executes a special command to get dma information from the card, and sets proper dma_mask. So the above message is not wrong for aacraid, I think.
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