Date: Wed, 18 Aug 1999 12:49:13 -0700 From: Amancio Hasty <hasty@rah.star-gate.com> To: "Kenneth D. Merry" <ken@kdm.org> Cc: dillon@apollo.backplane.com, wilko@yedi.iaf.nl, current@FreeBSD.ORG Subject: Re: [re]writable cdrom drive Message-ID: <199908181949.MAA01438@rah.star-gate.com> In-Reply-To: Your message of "Wed, 18 Aug 1999 13:39:45 MDT." <199908181939.NAA21622@panzer.kdm.org>
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> Amancio Hasty wrote... > > > Amancio Hasty wrote... > > > > I have to agree with Matt on this plus the set of defaults is system wide . > > > > > > What are you agreeing with him on? Why not quote what you're talking > > > about? > > > > > > > Is it possible to get a system bus enumeration from the system so > > > > a program such a cdrecord can attempt to make an intelligent > > > > decision as to which device is the cd recorder for instance we > > > > know that the system can print the device's name and its > > > > scsi address: > > > > > > If you want a bus number, there's a really easy way to get it: > > > > > > # camcontrol devlist > > > <EXABYTE EXB-10i 2.6> at scbus0 target 3 lun 0 (pass0,ch0) > > > <EXABYTE EXB-8500-85Qanx0 0415> at scbus0 target 4 lun 0 (pass1,sa0) > > > <SEAGATE ST31230W 0510> at scbus1 target 0 lun 0 (pass2,da0) > > > <SEAGATE ST32155N 0318> at scbus1 target 1 lun 0 (pass3,da1) > > > <PLEXTOR CD-R PX-R412C 1.04> at scbus1 target 3 lun 0 (pass4,cd0) > > > <PLEXTOR CD-ROM PX-4XCS 1.04> at scbus1 target 6 lun 0 (pass5,cd1) > > > <SEAGATE ST34371N 0484> at scbus2 target 0 lun 0 (pass6,da2) > > > > > > So, in this case, the bus,target,lun combination for my CD-R is 1,3,0. > > > > > > cdrecord itself also has a slightly more obtuse way of doing the same > > > thing: > > > > > > # cdrecord -scanbus > > > Cdrecord release 1.8a22 Copyright (C) 1995-1999 J_rg Schilling > > > scsibus0: > > > 0) * > > > 1) * > > [ ... ] > > > > The camcontrol output is easier to figure out, though. > > > > > > Ken > > > > This is about ease of use . cdrecord in the absence of a device specification > > should > > query the bus and present the user with a choice of cd recorder devices ideally > > if there is one cd recorder it should go ahead an use it if such behavior is > > not desired then create an option "--confirm" to ask the user if its okay > > to use the "guessed" cd recorder. > > If you think cdrecord should do something different, talk to Joerg > Schilling <schilling@fokus.gmd.de> about it. > > > camcontrol is a generic scsi command line interface and very nice . What I am > > after > > is a generic bus enumerator API so apps like cd recorder or fxtv can use > > to locate the device in the absence of a specified device. > > There is a generic SCSI bus enumerator API, and one for PCI as well. There > isn't a generic API to get trees of devices of any type in the system, > though. With new-bus that might be possible, but having done two > enumerator APIs already (I wrote the CAM and PCI enumerator code), I can > predict that it might be very complicated to do properly. (Things get > really hairy when you have to keep the device tree from changing while > you're traversing it.) > > In any case, for the two applications you specified, cdrecord is only > interested in SCSI devices, and there is already an API -- that cdrecord > already supports -- to do bus/device enumeration. The cdrecord -scanbus > code already uses that API. > > Similarly, there is already a PCI device listing interface, so fxtv should > be able to easily pull out the devices it is interested in. All it has to > do is search for all "meteor" or "bktr" devices to find what it wants. > > Ken Now how can I map a device name from this bus enumeration so that I can issue an "open" to the device: pciconf -l chip0@pci0:0:0: class=0x060000 card=0x00000000 chip=0x12378086 rev=0x02 hdr=0x00 isab0@pci0:1:0: class=0x060100 card=0x00000000 chip=0x70008086 rev=0x01 hdr=0x00 ide_pci0@pci0:1:1: class=0x010180 card=0x00000000 chip=0x70108086 rev=0x00 hdr=0x00 chip1@pci0:1:2: class=0x0c0300 card=0x00000000 chip=0x70208086 rev=0x01 hdr=0x00 de0@pci0:9:0: class=0x020000 card=0x11001385 chip=0x00091011 rev=0x22 hdr=0x00 bktr0@pci0:10:0: class=0x040000 card=0x13eb0070 chip=0x036e109e rev=0x02 hdr=0x00 none0@pci0:10:1: class=0x048000 card=0x13eb0070 chip=0x0878109e rev=0x02 hdr=0x00 ahc0@pci0:11:0: class=0x010000 card=0x00000000 chip=0x81789004 rev=0x00 hdr=0x00 ahc1@pci0:12:0: class=0x010000 card=0x00000000 chip=0x71789004 rev=0x03 hdr=0x00 vga-pci0@pci0:13:0: class=0x030000 card=0x00000000 chip=0x0519102b rev=0x01 hdr=0x00 -- Amancio Hasty hasty@rah.star-gate.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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