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)
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.
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