From owner-freebsd-hackers@freebsd.org Wed Aug 26 07:34:08 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 05A2F3CC377 for ; Wed, 26 Aug 2020 07:34:08 +0000 (UTC) (envelope-from darius@dons.net.au) Received: from midget.dons.net.au (midget.dons.net.au [IPv6:2403:5800:5101:0:ea:1cff:fefa:f00]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "dons.net.au", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BbyKS5NGbz4p8P for ; Wed, 26 Aug 2020 07:34:03 +0000 (UTC) (envelope-from darius@dons.net.au) Received: from midget.dons.net.au (localhost [127.0.0.1]) by midget.dons.net.au (8.15.2/8.15.2) with ESMTPS id 07Q7XdUN093773 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Wed, 26 Aug 2020 17:03:39 +0930 (ACST) (envelope-from darius@dons.net.au) Received: (from mailnull@localhost) by midget.dons.net.au (8.15.2/8.15.2/Submit) id 07Q7XYUh093767 for ; Wed, 26 Aug 2020 17:03:34 +0930 (ACST) (envelope-from darius@dons.net.au) X-MIMEDefang-Relay-be813b1f1da6d6b27d681222cb70cc4f5b642383: 2001:44b8:1d2:8900:6825:b1cc:2bd0:72f4 Received: from [IPv6:2001:44b8:1d2:8900:6825:b1cc:2bd0:72f4] ([IPv6:2001:44b8:1d2:8900:6825:b1cc:2bd0:72f4] [2001:44b8:1d2:8900:6825:b1cc:2bd0:72f4]) by midget.dons.net.au (envelope-sender ) (MIMEDefang) with ESMTP id 07Q7XSma093765; Wed, 26 Aug 2020 17:03:34 +0930 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.1\)) Subject: Re: Is this expected to work? Really? (test of abstraction levels). From: "O'Connor, Daniel" In-Reply-To: Date: Wed, 26 Aug 2020 17:03:28 +0930 Cc: FreeBSD Hackers Content-Transfer-Encoding: quoted-printable Message-Id: <53C7D7AD-86EE-4324-9686-AF4E4D1317F2@dons.net.au> References: To: Zaphod Beeblebrox X-Mailer: Apple Mail (2.3608.120.23.2.1) X-Spam-Score: 0.3 () No, score=0.3 required=5.0 tests=HELO_MISC_IP, HELO_NO_DOMAIN, T_SPF_PERMERROR autolearn=no autolearn_force=no version=3.4.2 X-Scanned-By: MIMEDefang 2.83 on 10.0.2.1 X-Rspamd-Queue-Id: 4BbyKS5NGbz4p8P X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.22 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.996]; R_DKIM_ALLOW(-0.20)[dons.net.au:s=default]; FROM_HAS_DN(0.00)[]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; NEURAL_HAM_LONG(-0.97)[-0.972]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[dons.net.au:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[dons.net.au,quarantine]; NEURAL_HAM_SHORT(-0.75)[-0.750]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:4764, ipnet:2403:5800:5000::/36, country:AU]; MID_RHS_MATCH_FROM(0.00)[]; MAILMAN_DEST(0.00)[freebsd-hackers]; SUBJECT_HAS_QUESTION(0.00)[] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Aug 2020 07:34:08 -0000 > On 26 Aug 2020, at 14:49, Zaphod Beeblebrox wrote: > So... here's the product: >=20 > = https://www.ebay.ca/itm/PCI-Express-PCI-e-to-PCI-Adapter-Card-PCIe-to-Dual= -PCI-Expansion-Card-USB-3-0/383647797022?hash=3Ditem595330cf1e:g:O~kAAOSw0= kxfGdIM >=20 > For those who don't want to click, we have PCIe 1x -->> usb3.0 -->> = PCI > 32bit/66. FYI that isn't really USB 3, it's just using USB 3 cabling to transport = the PCIe. You can think of it as a PCIe to PCI bridge with some long wires in it. > Is that likely to work? Is our abstraction of busses that powerful? = If I > plug, say, a PCI I/O controller with a floppy on it ... would that be > detected? I am not sure it would work but there is a non-zero chance :) -- Daniel O'Connor "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum