All,
I'm having some problems getting DMA to align appropriately for the
DP8390. The DP8390's DMA engine is programmed with the upper 16 bits in
single bus mode (single 32-bit DMA).
After reading the documentation for ddi_dma_attr_t, it looks like
dma_attr_sgl can be used to accomplish this, however I can't seem to get
dma_cookie_t.dmac_address to align correctly:
static ddi_dma_attr_t ne_dma_attr = {
DMA_ATTR_V0, /* dma_attr_version */
0, /* dma_attr_addr_lo */
0xffffffff, /* dma_attr_addr_hi */
0xffffffff, /* dma_attr_count_max */
1, /* dma_attr_align */
0x1f, /* dma_attr_burstsizes */
1, /* dma_attr_minxfer */
0xffffffff, /* dma_attr_maxxfer */
0xffff, /* dma_attr_sgl */
1, /* dma_attr_sgllen */
1, /* dma_attr_granular */
0 /* dma_attr_flags */
};
dmac.dma_address is: 0xc0190040.
Any ideas?
Steve
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