> There is one wrinkle however. I may need to access the associated buf > (bp) for a packet instead of passing it off for DMA. This is necessary > if the HBA has to fall back to PIO, or if the driver needs to "fake" a > SCSI transaction. The wrinkle here is that none of the entry points > directly take a bp anymore. Even tran_start() doesn't get the bp.
I'm confused. Or maybe you're confused... :) tran_init_pkt takes bp. E.g. scsa1394: we bp_mapin() in scsa1394_scsi_init_pkt() and save bp pointer in the private command structure scsa1394_cmd_t, which in turn hangs off of scsi_pkt->pkt_ha_private - which is how functions like tran_start get to it. We bp_mapout() in scsa1394_scsi_destroy_pkt(). In between, the driver simply references memory pointed by bp->b_un.b_addr. -Artem _______________________________________________ opensolaris-code mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
