Andriy Gapon wrote: > on 30/09/2010 20:46 Alexander Motin said the following: >> Andriy Gapon wrote: >>> on 30/09/2010 01:28 Matthew Jacob said the following: >>>> If something like that was in place, I assure you that things would start >>>> to use >>>> it very quickly. >>> I am not sure about this. >>> Because, e.g. I don't see an easy way to know that media is changed in >>> scsi_cd >>> driver. That is, without polling. I don't consider polling to be an easy >>> way for >>> a number of reasons. >> SATA specification defines concept of Asynchronous Notification. It is >> already used by port multipliers to report about PHY events. It is also >> supposed to be used by CD drives to report media change. I haven't seen >> such devices yet, but hope they may appear sometimes. > > Would this require some reverse-path from SIM driver to peripheral driver to > deliver a notification? Do we have one?
Yes we do. SATA PMP driver (it looks like usual peripheral driver from this point) already receives and handles AC_SCSI_AEN messages sent to it via xpt_async() mechanism. -- Alexander Motin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[email protected]"
