Hi, On Mon, Oct 31, 2011 at 12:53, yoma sophian <sophian.yoma@xxxxxxxxx> wrote: > hi stefan: > Thanks for your reply. > 2011/10/30, Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>: >> On Oct 30 yoma sophian wrote: >>> in scsi_init_sgtable, we create sgtable, sdb->table.sgl, and get the >>> page from blk_rq_map_sg. >>> But when the dma_address of sdb->table.sgl will be calclated out >>> before send the scsi command down to the lower level driver? >> >> The low level driver, not SCSI core, is responsible to obtain a DMA >> address. > > Why I ask this because I found there is no same transformation for > scsi usb subsystem. > Would anyone can let me know where it is? I am not familiar with the code in question, but I would guess that this would happen in the USB Controller Interface driver. Thanks, -- Julian Calaby Email: julian.calaby@xxxxxxxxx Profile: http://www.google.com/profiles/julian.calaby/ .Plan: http://sites.google.com/site/juliancalaby/ -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
