Date: Sat, 23 Aug 2003 21:33:07 -0600 From: "Kenneth D. Merry" <ken@kdm.org> To: stable@FreeBSD.org Subject: HEADS UP: cd(4), other CAM changes Message-ID: <20030824033307.GA87833@panzer.kdm.org>
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I have MFCed cd(4) support for switching between 6 byte and 10 byte mode
sense/select commands, along with a number of related changes.
Hopefully things will work better for people using USB, ATAPI and firewire
CDROM drives under -stable.
As noted below, cd(4)'s open() will still fail under -stable if you don't
have media in the drive. If bde and I can get things sufficiently worked
out, I may be able to allow the close/eject ioctls to succeed even when
there is no media in the drive. (That's what happens in -current.)
Another thing to note is that the da(4) command size sysctl has changed.
There is no longer a kern.cam.da.no_6_byte sysctl. Instead, there are
separate minimum_cmd_size sysctl variables and loader tunables for each
da(4) unit. (i.e. the same as in -current) (The reason is, you may have
one disk that can't handle 10 byte commands, and another that can't handle
6 byte commands in the same system.)
Anyway, let me know if you run into problems with these changes.
Ken
----- Forwarded message from "Kenneth D. Merry" <ken@FreeBSD.org> -----
From: "Kenneth D. Merry" <ken@FreeBSD.org>
Date: Sat, 23 Aug 2003 20:26:38 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/cam/scsi scsi_all.c scsi_all.h scsi_cd.c
scsi_cd.h scsi_da.c src/sys/dev/ata atapi-cam.c
ken 2003/08/23 20:26:38 PDT
FreeBSD src repository
Modified files: (Branch: RELENG_4)
sys/cam/scsi scsi_all.c scsi_all.h scsi_cd.c scsi_cd.h
scsi_da.c
sys/dev/ata atapi-cam.c
Log:
MFC: Fix ATAPI/USB/Firewire CDROM drive handling in cd(4) and hopefully
fix a number of related problems along the way.
Files/revisions merged:
scsi_cd.c: 1.72, 1.77, 1.80
scsi_all.c: 1.39 (partial)
scsi_all.h: 1.22
scsi_cd.h: 1.7
scsi_da.c: 1.139
atapi-cam.c: 1.13
not merged: umass.c rev 1.76 (doesn't apply to -stable)
Because of the differences between -current and -stable, some of these
changes are not identical to the ones in -current.
Most notably, cd(4) in -stable uses the slice code, whereas cd(4) in
-current has no disklabel support at all. So there is extra code in the
-stable version of these patches to handle that.
- Automatically detect CDROM drives that can't handle 6 byte mode
sense and mode select, and adjust our command size accordingly.
We have to handle this in the cd(4) driver (where the buffers are
allocated), since the parameter list length is different for the
6 and 10 byte mode sense commands.
- Remove MODE_SENSE and MODE_SELECT translation in ATAPICAM, since
there's no way for that to work properly.
- Merge support for sending a path inquiry CCB to see if the SIM has set
the PIM_NO_6_BYTE flag. (scsi_cd.c rev 1.80)
- Add a quirk entry for CDROM drives that just hang when they get a 6
byte mode sense or mode select. The reason for the quirk must be
documented in a PR, and all quirks must be approved by
ken@FreeBSD.org. This is to make sure that we fully understand why
each quirk is needed. In most cases, the PIM_NO_6_BYTE flag set by the
SIM driver should eliminate the need for a quirk.
- Change the way the da(4) handles the no_6_byte sysctl. There is
now a per-drive sysctl to set the minimum command size for that
particular disk. (Since you could have multiple disks with
multiple requirements in one system.)
- Loader tunable support for all the sysctls in the da(4) and cd(4)
drivers.
- Add a CDIOCCLOSE ioctl for cd(4) (bde pointed this out a long
time ago).
- Add a media validation routine (cdcheckmedia()) to the cd(4)
driver, to fix some problems bde pointed out a long time ago. For
-stable, open() will still fail if there is no media in the drive. This
is because of issues with the slice code handling media changing
underneath it. If bde and I can get those issues worked out, there is
basic code in this set of patches to handle allowing the CDIOCCLOSE and
CDIOCEJECT ioctls without media in the drive.
- The media validation routine also reads the table of contents off
the drive. We use the table of contents to implement the
CDIOCPLAYTRACKS ioctl using the PLAY AUDIO MSF command. The
PLAY AUDIO TRACK INDEX command that we previously used was
deprecated after SCSI-2. It works in every SCSI CDROM I've tried,
but doesn't seem to work on ATAPI CDROM drives. We still use the
play audio track index command if we don't have a valid TOC, but
I suppose it'll fail anyway in that case.
- Add _len() versions of scsi_mode_sense() and scsi_mode_select() so
that we can specify the minimum command length.
Approved by: re
Revision Changes Path
1.14.2.10 +28 -2 src/sys/cam/scsi/scsi_all.c
1.14.2.5 +17 -0 src/sys/cam/scsi/scsi_all.h
1.31.2.14 +1117 -378 src/sys/cam/scsi/scsi_cd.c
1.2.6.3 +54 -31 src/sys/cam/scsi/scsi_cd.h
1.42.2.40 +94 -8 src/sys/cam/scsi/scsi_da.c
1.10.2.5 +0 -30 src/sys/dev/ata/atapi-cam.c
----- End forwarded message -----
--
Kenneth Merry
ken@kdm.org
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