Hi there,
How do I know the address returned through ddi_dma_buf_bind_handle()?
The question is:
During debugging my SCSI HBA driver for bootable HBA case, the boot
processing
always stuck on a specific command where the address assigned is strange.
The
condition are following
1. bp->b_bcount=0x14000, bp->b_flags=0x2080051, bp->b_un.b_addr = 0;
ama_flags= 0xa;
2. allocate dma_handle
3. call ddi_dma_buf_bind_handle(handle, bp, dma_flags, callback, 0,
&cmd_dmacookie, &cmd->ncookie);
And return is always "0" (DDI_DMA_MAPPED)
4. The driver collect cmd_dmacookie.dmac_laddress to form a scatter/gatter
list,
it shows the following in several commands running
1st times 0x7f7c1000 ~ 0x7f594000 (14 sglist)
...
2nd times 0x7f6d5000 ~ 0x7f748000 (14 sglist)
...
3rd times 0x7fedd000 ~ 0x7f850000 (14 sglist)
...
4th times 0x2c74000 ~ 0x22b3000 (14 sglist) <----- get busted
The last one seems is not an valid address range. That's why I think
driver code get busted. I check every command before the last one has
been
returned and release resources. Do I operate correctly for this DMA? And
how
to fix it?
Thanks
Steve
_______________________________________________
driver-discuss mailing list
[email protected]
http://mail.opensolaris.org/mailman/listinfo/driver-discuss
