Max yes I'm assigning smu_generic_dma_attr to tmp_dma_attr before making the call. I've tried a bunch of things like changing the attributes but I still keep getting the error. Would switching to DDI_DMA_FORCE_PHYSICAL be advised? Since I'm writing this driver for a pseudo device I'm sure IOMMU virtual addresses won't be used. Bhaskar.
-----Original Message----- From: m...@bruningsystems.com [mailto:m...@bruningsystems.com] Sent: Friday, November 13, 2009 4:01 PM To: Jayaraman, Bhaskar Cc: opensolaris-code@opensolaris.org Subject: Re: [osol-code] DDI_DMA_BADATTR error! Hi Bhaskar, Jayaraman, Bhaskar wrote: > Hi I'm using an x86 vm which has an emulated IOMMU on it. The following are > the attributes that I'm passing to ddi_dma_alloc_handle > > static ddi_dma_attr_t smu_generic_dma_attr = { > DMA_ATTR_V0, /* dma_attr_version */ > (unsigned long long)0, /* low DMA address > range */ > (unsigned long long)0xffffffff, /* high DMA address range */ > (unsigned long long)0xffffffff, /* DMA counter register */ > 8, /* DMA address alignment */ > 0x07, /* DMA burstsizes */ > 1, /* min DMA size */ > (unsigned long long)0xffffffff, /* max DMA size */ > (unsigned long long)0xffffffff, /* segment boundary */ > 16, /* dma_attr_sglen */ > 512, /* granularity of device */ > 0 /* bus specific DMA flags */ > }; > > The call I make is ddi_dma_alloc_handle (instance->dip, &tmp_dma_attr, > DDI_DMA_DONTWAIT, 0, &acmd->cmd_dmahandle) > I assume you are assigning tmp_dma_attr to smu_generic_dma_attr before making this call? What happens if you pass &smu_generic_dma_attr instead of &tmp_dma_attr? max > In the 3rd parameter, I've tried using DDI_DMA_SLEEP as well but I still get > the DDI_DMA_BADATTR error from the API. > > I don't see where I'm going wrong in making the call. > > Regards, > Bhaskar. > > > ------------------------------------------------------------------------ > > _______________________________________________ > opensolaris-code mailing list > opensolaris-code@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/opensolaris-code > _______________________________________________ opensolaris-code mailing list opensolaris-code@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
