On Tue, Nov 24, 2009 at 06:20:24PM -0800, Yinghai Lu wrote:
>
> so can find out what is DMA mask is used for pci devices in addition to
> default setting.
Yinghai,
Thanks for bring this up again:
http://lkml.indiana.edu/hypermail/linux/kernel/0810.2/3172.html
I'd like to see this happen as DEBUG feature.
I just don't want to rehash the previous conversation.
thanks,
grant
>
> got:
> ehci_hcd 0000:00:02.1: using 31bit consistent DMA mask
> e1000 0000:0b:01.0: using 64bit DMA mask
> e1000 0000:0b:01.0: using 64bit consistent DMA mask
> e1000e 0000:04:00.0: using 64bit DMA mask
> e1000e 0000:04:00.0: using 64bit consistent DMA mask
> ixgb 0000:0c:01.0: using 64bit DMA mask
> ixgb 0000:0c:01.0: using 64bit consistent DMA mask
> 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
> qla2xxx 0000:0c:02.0: using 64bit consistent DMA mask
> qla2xxx 0000:0c:02.1: using 64bit consistent DMA mask
> lpfc 0000:06:00.0: using 64bit DMA mask
> lpfc 0000:06:00.1: using 64bit DMA mask
> pata_amd 0000:00:06.0: using 32bit DMA mask
> pata_amd 0000:00:06.0: using 32bit consistent DMA mask
> mptsas 0000:0c:04.0: using 64bit DMA mask
> mptsas 0000:0c:04.0: using 64bit consistent DMA mask
>
> forcedeth 0000:00:08.0: using 39bit DMA mask
> forcedeth 0000:00:08.0: using 39bit consistent DMA mask
> niu 0000:02:00.0: using 44bit DMA mask
> niu 0000:02:00.0: using 44bit consistent DMA mask
> sata_nv 0000:00:05.0: using 32bit DMA mask
> sata_nv 0000:00:05.0: using 32bit consistent DMA mask
> ib_mthca 0000:03:00.0: using 64bit DMA mask
> ib_mthca 0000:03:00.0: using 64bit consistent DMA mask
>
> wondering why: qlogic qla2xxx only set consistent to 64bit,
> emulex lpfc not set consistent to 64bit
>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
>
> ---
> drivers/pci/pci.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> Index: linux-2.6/drivers/pci/pci.c
> ===================================================================
> --- linux-2.6.orig/drivers/pci/pci.c
> +++ linux-2.6/drivers/pci/pci.c
> @@ -2101,6 +2101,8 @@ pci_set_dma_mask(struct pci_dev *dev, u6
> return -EIO;
>
> dev->dma_mask = mask;
> + dev_printk(KERN_DEBUG, &dev->dev, "using %dbit DMA mask\n",
> + fls64(mask));
>
> return 0;
> }
> @@ -2112,6 +2114,8 @@ pci_set_consistent_dma_mask(struct pci_d
> return -EIO;
>
> dev->dev.coherent_dma_mask = mask;
> + dev_printk(KERN_DEBUG, &dev->dev, "using %dbit consistent DMA mask\n",
> + fls64(mask));
>
> return 0;
> }
> --
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