From owner-freebsd-hackers Mon Jun 19 10: 2:39 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from mass.osd.bsdi.com (adsl-63-206-88-224.dsl.snfc21.pacbell.net [63.206.88.224]) by hub.freebsd.org (Postfix) with ESMTP id E266D37BCD7; Mon, 19 Jun 2000 10:02:33 -0700 (PDT) (envelope-from msmith@mass.osd.bsdi.com) Received: from mass.osd.bsdi.com (localhost [127.0.0.1]) by mass.osd.bsdi.com (8.9.3/8.9.3) with ESMTP id KAA08746; Mon, 19 Jun 2000 10:07:26 -0700 (PDT) (envelope-from msmith@mass.osd.bsdi.com) Message-Id: <200006191707.KAA08746@mass.osd.bsdi.com> X-Mailer: exmh version 2.1.1 10/15/1999 To: Mike Smith Cc: Warner Losh , freebsd-current@freebsd.org, freebsd-hackers@freebsd.org Subject: Re: ACPI project progress report In-reply-to: Your message of "Mon, 19 Jun 2000 09:42:10 PDT." <200006191642.JAA08637@mass.osd.bsdi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 19 Jun 2000 10:07:26 -0700 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > S4 requires the OS to reinitialise peripherals. Some comments I've seen > from the Linux folks suggest that we'll have to save and restore the PCI > configuration space as well. > > Basically, resume from S4 is not something that is going to be very easy > for us to implement. It'll require every S4-OK driver to re-initialise > in the resume method. (Note that we will also need to add suspend-to and > resume-from arguments to the relevant driver methods.) Hmm, this has me thinking again about suspend/resume. In the current context, can we expect a suspend veto from some function to actually DTRT? (ie. drivers that have been suspended get a resume call). Or should we make two passes over the suspend method? One with " intention to suspend at this level", the second to actually perform the suspension once the first has been accepted? This will allow non-ACPI-represented drivers to participate in determining which suspend level(s) can actually be supported by the hardware... -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message