1483 lines
41 KiB
Diff
1483 lines
41 KiB
Diff
From: Gerd Knorr <kraxel@bytesex.org>
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This patch adds a device driver for scsi media changer devices (tape
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libraries for example).
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It exists for quite some time (since 2.2.x or so ...), is used by several
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people and also is in some vendor kernels (debian, suse, maybe others as
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well). People bug be from time to time to submit it ;)
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Recently I went over it and did some 2.6 cleanups, module parameters and
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the like. And now, finally, here it is.
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Signed-off-by: Gerd Knorr <kraxel@bytesex.org>
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Signed-off-by: Andrew Morton <akpm@osdl.org>
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---
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25-akpm/Documentation/scsi-changer.txt | 180 +++++
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25-akpm/drivers/scsi/Kconfig | 18
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25-akpm/drivers/scsi/Makefile | 1
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25-akpm/drivers/scsi/ch.c | 1020 +++++++++++++++++++++++++++++++++
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25-akpm/include/linux/chio.h | 168 +++++
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25-akpm/include/linux/major.h | 1
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25-akpm/include/scsi/scsi.h | 3
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7 files changed, 1391 insertions(+)
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diff -aurN a/Documentation/scsi-changer.txt b/Documentation/scsi-changer.txt
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--- a/Documentation/scsi-changer.txt 1969-12-31 19:00:00.000000000 -0500
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+++ b/Documentation/scsi-changer.txt 2005-06-15 22:00:21.000000000 -0400
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@@ -0,0 +1,180 @@
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+
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+README for the SCSI media changer driver
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+========================================
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+
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+This is a driver for SCSI Medium Changer devices, which are listed
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+with "Type: Medium Changer" in /proc/scsi/scsi.
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+
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+This is for *real* Jukeboxes. It is *not* supported to work with
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+common small CD-ROM changers, neither one-lun-per-slot SCSI changers
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+nor IDE drives.
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+
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+Userland tools available from here:
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+ http://linux.bytesex.org/misc/changer.html
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+
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+
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+General Information
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+-------------------
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+
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+First some words about how changers work: A changer has 2 (possibly
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+more) SCSI ID's. One for the changer device which controls the robot,
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+and one for the device which actually reads and writes the data. The
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+later may be anything, a MOD, a CD-ROM, a tape or whatever. For the
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+changer device this is a "don't care", he *only* shuffles around the
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+media, nothing else.
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+
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+
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+The SCSI changer model is complex, compared to - for example - IDE-CD
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+changers. But it allows to handle nearly all possible cases. It knows
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+4 different types of changer elements:
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+
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+ media transport - this one shuffles around the media, i.e. the
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+ transport arm. Also known as "picker".
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+ storage - a slot which can hold a media.
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+ import/export - the same as above, but is accessable from outside,
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+ i.e. there the operator (you !) can use this to
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+ fill in and remove media from the changer.
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+ Sometimes named "mailslot".
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+ data transfer - this is the device which reads/writes, i.e. the
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+ CD-ROM / Tape / whatever drive.
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+
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+None of these is limited to one: A huge Jukebox could have slots for
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+123 CD-ROM's, 5 CD-ROM readers (and therefore 6 SCSI ID's: the changer
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+and each CD-ROM) and 2 transport arms. No problem to handle.
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+
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+
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+How it is implemented
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+---------------------
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+
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+I implemented the driver as character device driver with a NetBSD-like
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+ioctl interface. Just grabbed NetBSD's header file and one of the
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+other linux SCSI device drivers as starting point. The interface
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+should be source code compatible with NetBSD. So if there is any
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+software (anybody knows ???) which supports a BSDish changer driver,
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+it should work with this driver too.
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+
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+Over time a few more ioctls where added, volume tag support for example
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+wasn't covered by the NetBSD ioctl API.
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+
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+
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+Current State
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+-------------
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+
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+Support for more than one transport arm is not implemented yet (and
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+nobody asked for it so far...).
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+
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+I test and use the driver myself with a 35 slot cdrom jukebox from
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+Grundig. I got some reports telling it works ok with tape autoloaders
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+(Exabyte, HP and DEC). Some People use this driver with amanda. It
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+works fine with small (11 slots) and a huge (4 MOs, 88 slots)
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+magneto-optical Jukebox. Probably with lots of other changers too, most
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+(but not all :-) people mail me only if it does *not* work...
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+
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+I don't have any device lists, neither black-list nor white-list. Thus
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+it is quite useless to ask me whenever a specific device is supported or
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+not. In theory every changer device which supports the SCSI-2 media
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+changer command set should work out-of-the-box with this driver. If it
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+doesn't, it is a bug. Either within the driver or within the firmware
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+of the changer device.
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+
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+
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+Using it
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+--------
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+
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+This is a character device with major number is 86, so use
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+"mknod /dev/sch0 c 86 0" to create the special file for the driver.
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+
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+If the module finds the changer, it prints some messages about the
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+device [ try "dmesg" if you don't see anything ] and should show up in
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+/proc/devices. If not.... some changers use ID ? / LUN 0 for the
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+device and ID ? / LUN 1 for the robot mechanism. But Linux does *not*
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+look for LUN's other than 0 as default, becauce there are to many
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+broken devices. So you can try:
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+
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+ 1) echo "scsi add-single-device 0 0 ID 1" > /proc/scsi/scsi
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+ (replace ID with the SCSI-ID of the device)
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+ 2) boot the kernel with "max_scsi_luns=1" on the command line
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+ (append="max_scsi_luns=1" in lilo.conf should do the trick)
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+
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+
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+Trouble?
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+--------
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+
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+If you insmod the driver with "insmod debug=1", it will be verbose and
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+prints a lot of stuff to the syslog. Compiling the kernel with
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+CONFIG_SCSI_CONSTANTS=y improves the quality of the error messages alot
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+because the kernel will translate the error codes into human-readable
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+strings then.
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+
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+You can display these messages with the dmesg command (or check the
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+logfiles). If you email me some question becauce of a problem with the
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+driver, please include these messages.
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+
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+
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+Insmod options
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+--------------
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+
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+debug=0/1
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+ Enable debug messages (see above, default: 0).
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+
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+verbose=0/1
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+ Be verbose (default: 1).
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+
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+init=0/1
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+ Send INITIALIZE ELEMENT STATUS command to the changer
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+ at insmod time (default: 1).
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+
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+timeout_init=<seconds>
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+ timeout for the INITIALIZE ELEMENT STATUS command
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+ (default: 3600).
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+
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+timeout_move=<seconds>
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+ timeout for all other commands (default: 120).
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+
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+dt_id=<id1>,<id2>,...
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+dt_lun=<lun1>,<lun2>,...
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+ These two allow to specify the SCSI ID and LUN for the data
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+ transfer elements. You likely don't need this as the jukebox
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+ should provide this information. But some devices don't ...
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+
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+vendor_firsts=
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+vendor_counts=
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+vendor_labels=
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+ These insmod options can be used to tell the driver that there
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+ are some vendor-specific element types. Grundig for example
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+ does this. Some jukeboxes have a printer to label fresh burned
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+ CDs, which is addressed as element 0xc000 (type 5). To tell the
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+ driver about this vendor-specific element, use this:
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+ $ insmod ch \
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+ vendor_firsts=0xc000 \
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+ vendor_counts=1 \
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+ vendor_labels=printer
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+ All three insmod options accept up to four comma-separated
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+ values, this way you can configure the element types 5-8.
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+ You likely need the SCSI specs for the device in question to
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+ find the correct values as they are not covered by the SCSI-2
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+ standard.
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+
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+
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+Credits
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+-------
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+
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+I wrote this driver using the famous mailing-patches-around-the-world
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+method. With (more or less) help from:
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+
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+ Daniel Moehwald <moehwald@hdg.de>
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+ Dane Jasper <dane@sonic.net>
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+ R. Scott Bailey <sbailey@dsddi.eds.com>
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+ Jonathan Corbet <corbet@atd.ucar.edu>
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+
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+Special thanks go to
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+ Martin Kuehne <martin.kuehne@bnbt.de>
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+for a old, second-hand (but full functional) cdrom jukebox which I use
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+to develop/test driver and tools now.
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+
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+Have fun,
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+
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+ Gerd
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+
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+--
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+Gerd Knorr <kraxel@bytesex.org>
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diff -aurN a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
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--- a/drivers/scsi/Kconfig 2005-06-06 11:22:29.000000000 -0400
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+++ b/drivers/scsi/Kconfig 2005-06-15 22:00:21.000000000 -0400
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@@ -137,6 +137,24 @@
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If unsure, say N.
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+config CHR_DEV_SCH
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+ tristate "SCSI media changer support"
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+ depends on SCSI
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+ ---help---
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+ This is a driver for SCSI media changers. Most common devices are
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+ tape libraries and MOD/CDROM jukeboxes. *Real* jukeboxes, you
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+ don't need this for those tiny 6-slot cdrom changers. Media
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+ changers are listed as "Type: Medium Changer" in /proc/scsi/scsi.
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+ If you have such hardware and want to use it with linux, say Y
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+ here. Check <file:Documentation/scsi-changer.txt> for details.
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+
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+ If you want to compile this as a module ( = code which can be
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+ inserted in and removed from the running kernel whenever you want),
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+ say M here and read <file:Documentation/modules.txt> and
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+ <file:Documentation/scsi.txt>. The module will be called ch.o.
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+ If unsure, say N.
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+
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+
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comment "Some SCSI devices (e.g. CD jukebox) support multiple LUNs"
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depends on SCSI
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diff -aurN a/drivers/scsi/Makefile b/drivers/scsi/Makefile
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--- a/drivers/scsi/Makefile 2005-06-06 11:22:29.000000000 -0400
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+++ b/drivers/scsi/Makefile 2005-06-15 22:00:21.000000000 -0400
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@@ -142,6 +142,7 @@
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obj-$(CONFIG_BLK_DEV_SD) += sd_mod.o
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obj-$(CONFIG_BLK_DEV_SR) += sr_mod.o
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obj-$(CONFIG_CHR_DEV_SG) += sg.o
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+obj-$(CONFIG_CHR_DEV_SCH) += ch.o
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scsi_mod-y += scsi.o hosts.o scsi_ioctl.o constants.o \
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scsicam.o scsi_error.o scsi_lib.o \
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diff -aurN a/drivers/scsi/ch.c b/drivers/scsi/ch.c
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--- a/drivers/scsi/ch.c 1969-12-31 19:00:00.000000000 -0500
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+++ b/drivers/scsi/ch.c 2005-06-15 22:00:21.000000000 -0400
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@@ -0,0 +1,1020 @@
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+/*
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+ * SCSI Media Changer device driver for Linux 2.6
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+ *
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+ * (c) 1996-2003 Gerd Knorr <kraxel@bytesex.org>
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+ *
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+ */
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+
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+#define VERSION "0.24"
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+
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+#include <linux/config.h>
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/fs.h>
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+#include <linux/kernel.h>
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+#include <linux/sched.h>
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+#include <linux/mm.h>
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+#include <linux/major.h>
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+#include <linux/string.h>
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+#include <linux/errno.h>
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+#include <linux/interrupt.h>
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+#include <linux/blkdev.h>
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+#include <linux/completion.h>
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+#include <linux/devfs_fs_kernel.h>
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+#include <linux/ioctl32.h>
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+#include <linux/compat.h>
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+#include <linux/chio.h> /* here are all the ioctls */
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+
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+#include <scsi/scsi.h>
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+#include <scsi/scsi_cmnd.h>
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+#include <scsi/scsi_driver.h>
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+#include <scsi/scsi_ioctl.h>
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+#include <scsi/scsi_host.h>
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+#include <scsi/scsi_device.h>
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+#include <scsi/scsi_request.h>
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+#include <scsi/scsi_dbg.h>
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+
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+#define CH_DT_MAX 16
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+#define CH_TYPES 8
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+
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+MODULE_DESCRIPTION("device driver for scsi media changer devices");
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+MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>");
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+MODULE_LICENSE("GPL");
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+
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+static int init = 1;
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+module_param(init, int, 0444);
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+MODULE_PARM_DESC(init, \
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+ "initialize element status on driver load (default: on)");
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+
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+static int timeout_move = 300;
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+module_param(timeout_move, int, 0644);
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+MODULE_PARM_DESC(timeout_move,"timeout for move commands "
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+ "(default: 300 seconds)");
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+
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+static int timeout_init = 3600;
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+module_param(timeout_init, int, 0644);
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+MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS "
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+ "(default: 3600 seconds)");
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+
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+static int verbose = 1;
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+module_param(verbose, int, 0644);
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+MODULE_PARM_DESC(verbose,"be verbose (default: on)");
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+
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+static int debug = 0;
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+module_param(debug, int, 0644);
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+MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more "
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+ "detailed sense codes on scsi errors (default: off)");
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+
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+static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 };
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+static int dt_lun[CH_DT_MAX];
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+module_param_array(dt_id, int, NULL, 0444);
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+module_param_array(dt_lun, int, NULL, 0444);
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+
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+/* tell the driver about vendor-specific slots */
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+static int vendor_firsts[CH_TYPES-4];
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+static int vendor_counts[CH_TYPES-4];
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+module_param_array(vendor_firsts, int, NULL, 0444);
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+module_param_array(vendor_counts, int, NULL, 0444);
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+
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+static char *vendor_labels[CH_TYPES-4] = {
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+ "v0", "v1", "v2", "v3"
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+};
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+// module_param_string_array(vendor_labels, NULL, 0444);
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+
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+#define dprintk(fmt, arg...) if (debug) \
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+ printk(KERN_DEBUG "%s: " fmt, ch->name, ##arg)
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+#define vprintk(fmt, arg...) if (verbose) \
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+ printk(KERN_INFO "%s: " fmt, ch->name, ##arg)
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+
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+/* ------------------------------------------------------------------- */
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+
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+#define MAX_RETRIES 1
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+
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+static int ch_probe(struct device *);
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+static int ch_remove(struct device *);
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+static int ch_open(struct inode * inode, struct file * filp);
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+static int ch_release(struct inode * inode, struct file * filp);
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+static int ch_ioctl(struct inode * inode, struct file * filp,
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+ unsigned int cmd, unsigned long arg);
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+static long ch_ioctl_compat(struct file * filp,
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+ unsigned int cmd, unsigned long arg);
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+
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+typedef struct {
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+ struct list_head list;
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+ int minor;
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+ char name[8];
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+ struct scsi_device *device;
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+ struct scsi_device **dt; /* ptrs to data transfer elements */
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+ u_int firsts[CH_TYPES];
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+ u_int counts[CH_TYPES];
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+ u_int unit_attention;
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+ u_int voltags;
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+ struct semaphore lock;
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+} scsi_changer;
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+
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+static LIST_HEAD(ch_devlist);
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+static spinlock_t ch_devlist_lock = SPIN_LOCK_UNLOCKED;
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+static int ch_devcount;
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+
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+struct scsi_driver ch_template =
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+{
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+ .owner = THIS_MODULE,
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+ .gendrv = {
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+ .name = "ch",
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+ .probe = ch_probe,
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+ .remove = ch_remove,
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+ },
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+};
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+
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+static struct file_operations changer_fops =
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+{
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+ .owner = THIS_MODULE,
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+ .open = ch_open,
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+ .release = ch_release,
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+ .ioctl = ch_ioctl,
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+#ifdef CONFIG_COMPAT
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+ .compat_ioctl = ch_ioctl_compat,
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+#endif
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+};
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+
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+static struct {
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+ unsigned char sense;
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+ unsigned char asc;
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+ unsigned char ascq;
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+ int errno;
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+} err[] = {
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+/* Just filled in what looks right. Hav'nt checked any standard paper for
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+ these errno assignments, so they may be wrong... */
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+ {
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+ .sense = ILLEGAL_REQUEST,
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+ .asc = 0x21,
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+ .ascq = 0x01,
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+ .errno = EBADSLT, /* Invalid element address */
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+ },{
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+ .sense = ILLEGAL_REQUEST,
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+ .asc = 0x28,
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+ .ascq = 0x01,
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+ .errno = EBADE, /* Import or export element accessed */
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+ },{
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+ .sense = ILLEGAL_REQUEST,
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+ .asc = 0x3B,
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+ .ascq = 0x0D,
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+ .errno = EXFULL, /* Medium destination element full */
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+ },{
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+ .sense = ILLEGAL_REQUEST,
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+ .asc = 0x3B,
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+ .ascq = 0x0E,
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+ .errno = EBADE, /* Medium source element empty */
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+ },{
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+ .sense = ILLEGAL_REQUEST,
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+ .asc = 0x20,
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+ .ascq = 0x00,
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+ .errno = EBADRQC, /* Invalid command operation code */
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+ },{
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+ /* end of list */
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+ }
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+};
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+
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+/* ------------------------------------------------------------------- */
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+
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+static int ch_find_errno(unsigned char *sense_buffer)
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+{
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+ int i,errno = 0;
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+
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+ /* Check to see if additional sense information is available */
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+ if (sense_buffer[7] > 5 &&
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+ sense_buffer[12] != 0) {
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+ for (i = 0; err[i].errno != 0; i++) {
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+ if (err[i].sense == sense_buffer[ 2] &&
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+ err[i].asc == sense_buffer[12] &&
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+ err[i].ascq == sense_buffer[13]) {
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+ errno = -err[i].errno;
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+ break;
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+ }
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+ }
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+ }
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+ if (errno == 0)
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+ errno = -EIO;
|
|
+ return errno;
|
|
+}
|
|
+
|
|
+static void
|
|
+ch_request_done(struct scsi_cmnd *sc)
|
|
+{
|
|
+ sc->request->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */
|
|
+ if (sc->request->waiting != NULL)
|
|
+ complete(sc->request->waiting);
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_do_scsi(scsi_changer *ch, unsigned char *cmd,
|
|
+ void *buffer, unsigned buflength)
|
|
+{
|
|
+ int errno, retries = 0, timeout;
|
|
+ DECLARE_COMPLETION(wait);
|
|
+ struct scsi_request *sr;
|
|
+
|
|
+ sr = scsi_allocate_request(ch->device, GFP_KERNEL);
|
|
+ if (NULL == sr)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ retry:
|
|
+ errno = 0;
|
|
+ if (debug) {
|
|
+ dprintk("command: ");
|
|
+ __scsi_print_command(cmd);
|
|
+ }
|
|
+
|
|
+ sr->sr_request->waiting = &wait;
|
|
+ timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS)
|
|
+ ? timeout_init : timeout_move;
|
|
+ scsi_do_req(sr, cmd, buffer, buflength, ch_request_done,
|
|
+ timeout * HZ, MAX_RETRIES);
|
|
+ wait_for_completion(&wait);
|
|
+ sr->sr_request->waiting = NULL;
|
|
+
|
|
+ dprintk("result: 0x%x\n",sr->sr_result);
|
|
+ if (driver_byte(sr->sr_result) != 0) {
|
|
+ if (debug)
|
|
+ scsi_print_req_sense(ch->name, sr);
|
|
+ errno = ch_find_errno(sr->sr_sense_buffer);
|
|
+
|
|
+ switch(sr->sr_sense_buffer[2] & 0xf) {
|
|
+ case UNIT_ATTENTION:
|
|
+ ch->unit_attention = 1;
|
|
+ if (retries++ < 3)
|
|
+ goto retry;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+ scsi_release_request(sr);
|
|
+ return errno;
|
|
+}
|
|
+
|
|
+/* ------------------------------------------------------------------------ */
|
|
+
|
|
+static int
|
|
+ch_elem_to_typecode(scsi_changer *ch, u_int elem)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < CH_TYPES; i++) {
|
|
+ if (elem >= ch->firsts[i] &&
|
|
+ elem < ch->firsts[i] +
|
|
+ ch->counts[i])
|
|
+ return i+1;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_read_element_status(scsi_changer *ch, u_int elem, char *data)
|
|
+{
|
|
+ u_char cmd[12];
|
|
+ u_char *buffer;
|
|
+ int result;
|
|
+
|
|
+ buffer = kmalloc(512, GFP_KERNEL);
|
|
+ if(!buffer)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ retry:
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = READ_ELEMENT_STATUS;
|
|
+ cmd[1] = (ch->device->lun << 5) |
|
|
+ (ch->voltags ? 0x10 : 0) |
|
|
+ ch_elem_to_typecode(ch,elem);
|
|
+ cmd[2] = (elem >> 8) & 0xff;
|
|
+ cmd[3] = elem & 0xff;
|
|
+ cmd[5] = 1;
|
|
+ cmd[9] = 255;
|
|
+ if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256))) {
|
|
+ if (((buffer[16] << 8) | buffer[17]) != elem) {
|
|
+ dprintk("asked for element 0x%02x, got 0x%02x\n",
|
|
+ elem,(buffer[16] << 8) | buffer[17]);
|
|
+ kfree(buffer);
|
|
+ return -EIO;
|
|
+ }
|
|
+ memcpy(data,buffer+16,16);
|
|
+ } else {
|
|
+ if (ch->voltags) {
|
|
+ ch->voltags = 0;
|
|
+ vprintk("device has no volume tag support%s\n","");
|
|
+ goto retry;
|
|
+ }
|
|
+ dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem);
|
|
+ }
|
|
+ kfree(buffer);
|
|
+ return result;
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_init_elem(scsi_changer *ch)
|
|
+{
|
|
+ int err;
|
|
+ u_char cmd[6];
|
|
+
|
|
+ vprintk("INITIALIZE ELEMENT STATUS, may take some time ...%s\n","");
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = INITIALIZE_ELEMENT_STATUS;
|
|
+ cmd[1] = ch->device->lun << 5;
|
|
+ err = ch_do_scsi(ch, cmd, NULL, 0);
|
|
+ vprintk("... finished%s\n","");
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_readconfig(scsi_changer *ch)
|
|
+{
|
|
+ u_char cmd[10], data[16];
|
|
+ u_char *buffer;
|
|
+ int result,id,lun,i;
|
|
+ u_int elem;
|
|
+
|
|
+ buffer = kmalloc(512, GFP_KERNEL);
|
|
+ if (!buffer)
|
|
+ return -ENOMEM;
|
|
+ memset(buffer,0,512);
|
|
+
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = MODE_SENSE;
|
|
+ cmd[1] = ch->device->lun << 5;
|
|
+ cmd[2] = 0x1d;
|
|
+ cmd[4] = 255;
|
|
+ result = ch_do_scsi(ch, cmd, buffer, 255);
|
|
+ if (0 != result) {
|
|
+ cmd[1] |= (1<<3);
|
|
+ result = ch_do_scsi(ch, cmd, buffer, 255);
|
|
+ }
|
|
+ if (0 == result) {
|
|
+ ch->firsts[CHET_MT] =
|
|
+ (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7];
|
|
+ ch->counts[CHET_MT] =
|
|
+ (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9];
|
|
+ ch->firsts[CHET_ST] =
|
|
+ (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11];
|
|
+ ch->counts[CHET_ST] =
|
|
+ (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13];
|
|
+ ch->firsts[CHET_IE] =
|
|
+ (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15];
|
|
+ ch->counts[CHET_IE] =
|
|
+ (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17];
|
|
+ ch->firsts[CHET_DT] =
|
|
+ (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19];
|
|
+ ch->counts[CHET_DT] =
|
|
+ (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21];
|
|
+ vprintk("type #1 (mt): 0x%x+%d [medium transport]\n",
|
|
+ ch->firsts[CHET_MT],
|
|
+ ch->counts[CHET_MT]);
|
|
+ vprintk("type #2 (st): 0x%x+%d [storage]\n",
|
|
+ ch->firsts[CHET_ST],
|
|
+ ch->counts[CHET_ST]);
|
|
+ vprintk("type #3 (ie): 0x%x+%d [import/export]\n",
|
|
+ ch->firsts[CHET_IE],
|
|
+ ch->counts[CHET_IE]);
|
|
+ vprintk("type #4 (dt): 0x%x+%d [data transfer]\n",
|
|
+ ch->firsts[CHET_DT],
|
|
+ ch->counts[CHET_DT]);
|
|
+ } else {
|
|
+ vprintk("reading element address assigment page failed!%s\n",
|
|
+ "");
|
|
+ }
|
|
+
|
|
+ /* vendor specific element types */
|
|
+ for (i = 0; i < 4; i++) {
|
|
+ if (0 == vendor_counts[i])
|
|
+ continue;
|
|
+ if (NULL == vendor_labels[i])
|
|
+ continue;
|
|
+ ch->firsts[CHET_V1+i] = vendor_firsts[i];
|
|
+ ch->counts[CHET_V1+i] = vendor_counts[i];
|
|
+ vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n",
|
|
+ i+5,i+1,vendor_firsts[i],vendor_counts[i],
|
|
+ vendor_labels[i]);
|
|
+ }
|
|
+
|
|
+ /* look up the devices of the data transfer elements */
|
|
+ ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device),
|
|
+ GFP_KERNEL);
|
|
+ for (elem = 0; elem < ch->counts[CHET_DT]; elem++) {
|
|
+ id = -1;
|
|
+ lun = 0;
|
|
+ if (-1 != dt_id[elem]) {
|
|
+ id = dt_id[elem];
|
|
+ lun = dt_lun[elem];
|
|
+ vprintk("dt 0x%x: [insmod option] ",
|
|
+ elem+ch->firsts[CHET_DT]);
|
|
+ } else if (0 != ch_read_element_status
|
|
+ (ch,elem+ch->firsts[CHET_DT],data)) {
|
|
+ vprintk("dt 0x%x: READ ELEMENT STATUS failed\n",
|
|
+ elem+ch->firsts[CHET_DT]);
|
|
+ } else {
|
|
+ vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]);
|
|
+ if (data[6] & 0x80) {
|
|
+ if (verbose)
|
|
+ printk("not this SCSI bus\n");
|
|
+ ch->dt[elem] = NULL;
|
|
+ } else if (0 == (data[6] & 0x30)) {
|
|
+ if (verbose)
|
|
+ printk("ID/LUN unknown\n");
|
|
+ ch->dt[elem] = NULL;
|
|
+ } else {
|
|
+ id = ch->device->id;
|
|
+ lun = 0;
|
|
+ if (data[6] & 0x20) id = data[7];
|
|
+ if (data[6] & 0x10) lun = data[6] & 7;
|
|
+ }
|
|
+ }
|
|
+ if (-1 != id) {
|
|
+ if (verbose)
|
|
+ printk("ID %i, LUN %i, ",id,lun);
|
|
+ ch->dt[elem] =
|
|
+ scsi_device_lookup(ch->device->host,
|
|
+ ch->device->channel,
|
|
+ id,lun);
|
|
+ if (!ch->dt[elem]) {
|
|
+ /* should not happen */
|
|
+ if (verbose)
|
|
+ printk("Huh? device not found!\n");
|
|
+ } else {
|
|
+ if (verbose)
|
|
+ printk("name: %8.8s %16.16s %4.4s\n",
|
|
+ ch->dt[elem]->vendor,
|
|
+ ch->dt[elem]->model,
|
|
+ ch->dt[elem]->rev);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ ch->voltags = 1;
|
|
+ kfree(buffer);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/* ------------------------------------------------------------------------ */
|
|
+
|
|
+static int
|
|
+ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate)
|
|
+{
|
|
+ u_char cmd[10];
|
|
+
|
|
+ dprintk("position: 0x%x\n",elem);
|
|
+ if (0 == trans)
|
|
+ trans = ch->firsts[CHET_MT];
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = POSITION_TO_ELEMENT;
|
|
+ cmd[1] = ch->device->lun << 5;
|
|
+ cmd[2] = (trans >> 8) & 0xff;
|
|
+ cmd[3] = trans & 0xff;
|
|
+ cmd[4] = (elem >> 8) & 0xff;
|
|
+ cmd[5] = elem & 0xff;
|
|
+ cmd[8] = rotate ? 1 : 0;
|
|
+ return ch_do_scsi(ch, cmd, NULL,0);
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate)
|
|
+{
|
|
+ u_char cmd[12];
|
|
+
|
|
+ dprintk("move: 0x%x => 0x%x\n",src,dest);
|
|
+ if (0 == trans)
|
|
+ trans = ch->firsts[CHET_MT];
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = MOVE_MEDIUM;
|
|
+ cmd[1] = ch->device->lun << 5;
|
|
+ cmd[2] = (trans >> 8) & 0xff;
|
|
+ cmd[3] = trans & 0xff;
|
|
+ cmd[4] = (src >> 8) & 0xff;
|
|
+ cmd[5] = src & 0xff;
|
|
+ cmd[6] = (dest >> 8) & 0xff;
|
|
+ cmd[7] = dest & 0xff;
|
|
+ cmd[10] = rotate ? 1 : 0;
|
|
+ return ch_do_scsi(ch, cmd, NULL,0);
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_exchange(scsi_changer *ch, u_int trans, u_int src,
|
|
+ u_int dest1, u_int dest2, int rotate1, int rotate2)
|
|
+{
|
|
+ u_char cmd[12];
|
|
+
|
|
+ dprintk("exchange: 0x%x => 0x%x => 0x%x\n",
|
|
+ src,dest1,dest2);
|
|
+ if (0 == trans)
|
|
+ trans = ch->firsts[CHET_MT];
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = EXCHANGE_MEDIUM;
|
|
+ cmd[1] = ch->device->lun << 5;
|
|
+ cmd[2] = (trans >> 8) & 0xff;
|
|
+ cmd[3] = trans & 0xff;
|
|
+ cmd[4] = (src >> 8) & 0xff;
|
|
+ cmd[5] = src & 0xff;
|
|
+ cmd[6] = (dest1 >> 8) & 0xff;
|
|
+ cmd[7] = dest1 & 0xff;
|
|
+ cmd[8] = (dest2 >> 8) & 0xff;
|
|
+ cmd[9] = dest2 & 0xff;
|
|
+ cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0);
|
|
+
|
|
+ return ch_do_scsi(ch, cmd, NULL,0);
|
|
+}
|
|
+
|
|
+static void
|
|
+ch_check_voltag(char *tag)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < 32; i++) {
|
|
+ /* restrict to ascii */
|
|
+ if (tag[i] >= 0x7f || tag[i] < 0x20)
|
|
+ tag[i] = ' ';
|
|
+ /* don't allow search wildcards */
|
|
+ if (tag[i] == '?' ||
|
|
+ tag[i] == '*')
|
|
+ tag[i] = ' ';
|
|
+ }
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_set_voltag(scsi_changer *ch, u_int elem,
|
|
+ int alternate, int clear, u_char *tag)
|
|
+{
|
|
+ u_char cmd[12];
|
|
+ u_char *buffer;
|
|
+ int result;
|
|
+
|
|
+ buffer = kmalloc(512, GFP_KERNEL);
|
|
+ if (!buffer)
|
|
+ return -ENOMEM;
|
|
+ memset(buffer,0,512);
|
|
+
|
|
+ dprintk("%s %s voltag: 0x%x => \"%s\"\n",
|
|
+ clear ? "clear" : "set",
|
|
+ alternate ? "alternate" : "primary",
|
|
+ elem, tag);
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = SEND_VOLUME_TAG;
|
|
+ cmd[1] = (ch->device->lun << 5) |
|
|
+ ch_elem_to_typecode(ch,elem);
|
|
+ cmd[2] = (elem >> 8) & 0xff;
|
|
+ cmd[3] = elem & 0xff;
|
|
+ cmd[5] = clear
|
|
+ ? (alternate ? 0x0d : 0x0c)
|
|
+ : (alternate ? 0x0b : 0x0a);
|
|
+
|
|
+ cmd[9] = 255;
|
|
+
|
|
+ memcpy(buffer,tag,32);
|
|
+ ch_check_voltag(buffer);
|
|
+
|
|
+ result = ch_do_scsi(ch, cmd, buffer, 256);
|
|
+ kfree(buffer);
|
|
+ return result;
|
|
+}
|
|
+
|
|
+static int ch_gstatus(scsi_changer *ch, int type, unsigned char *dest)
|
|
+{
|
|
+ int retval = 0;
|
|
+ u_char data[16];
|
|
+ unsigned int i;
|
|
+
|
|
+ down(&ch->lock);
|
|
+ for (i = 0; i < ch->counts[type]; i++) {
|
|
+ if (0 != ch_read_element_status
|
|
+ (ch, ch->firsts[type]+i,data)) {
|
|
+ retval = -EIO;
|
|
+ break;
|
|
+ }
|
|
+ put_user(data[2], dest+i);
|
|
+ if (data[2] & CESTATUS_EXCEPT)
|
|
+ vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n",
|
|
+ ch->firsts[type]+i,
|
|
+ (int)data[4],(int)data[5]);
|
|
+ retval = ch_read_element_status
|
|
+ (ch, ch->firsts[type]+i,data);
|
|
+ if (0 != retval)
|
|
+ break;
|
|
+ }
|
|
+ up(&ch->lock);
|
|
+ return retval;
|
|
+}
|
|
+
|
|
+/* ------------------------------------------------------------------------ */
|
|
+
|
|
+static int
|
|
+ch_release(struct inode *inode, struct file *file)
|
|
+{
|
|
+ scsi_changer *ch = file->private_data;
|
|
+
|
|
+ scsi_device_put(ch->device);
|
|
+ file->private_data = NULL;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_open(struct inode *inode, struct file *file)
|
|
+{
|
|
+ scsi_changer *tmp, *ch;
|
|
+ int minor = iminor(inode);
|
|
+
|
|
+ spin_lock(&ch_devlist_lock);
|
|
+ ch = NULL;
|
|
+ list_for_each_entry(tmp,&ch_devlist,list) {
|
|
+ if (tmp->minor == minor)
|
|
+ ch = tmp;
|
|
+ }
|
|
+ if (NULL == ch || scsi_device_get(ch->device)) {
|
|
+ spin_unlock(&ch_devlist_lock);
|
|
+ return -ENXIO;
|
|
+ }
|
|
+ spin_unlock(&ch_devlist_lock);
|
|
+
|
|
+ file->private_data = ch;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int
|
|
+ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit)
|
|
+{
|
|
+ if (type >= CH_TYPES || unit >= ch->counts[type])
|
|
+ return -1;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ch_ioctl(struct inode * inode, struct file * file,
|
|
+ unsigned int cmd, unsigned long arg)
|
|
+{
|
|
+ scsi_changer *ch = file->private_data;
|
|
+ int retval;
|
|
+
|
|
+ switch (cmd) {
|
|
+ case CHIOGPARAMS:
|
|
+ {
|
|
+ struct changer_params params;
|
|
+
|
|
+ params.cp_curpicker = 0;
|
|
+ params.cp_npickers = ch->counts[CHET_MT];
|
|
+ params.cp_nslots = ch->counts[CHET_ST];
|
|
+ params.cp_nportals = ch->counts[CHET_IE];
|
|
+ params.cp_ndrives = ch->counts[CHET_DT];
|
|
+
|
|
+ if (copy_to_user((void *) arg, ¶ms, sizeof(params)))
|
|
+ return -EFAULT;
|
|
+ return 0;
|
|
+ }
|
|
+ case CHIOGVPARAMS:
|
|
+ {
|
|
+ struct changer_vendor_params vparams;
|
|
+
|
|
+ memset(&vparams,0,sizeof(vparams));
|
|
+ if (ch->counts[CHET_V1]) {
|
|
+ vparams.cvp_n1 = ch->counts[CHET_V1];
|
|
+ strncpy(vparams.cvp_label1,vendor_labels[0],16);
|
|
+ }
|
|
+ if (ch->counts[CHET_V2]) {
|
|
+ vparams.cvp_n2 = ch->counts[CHET_V2];
|
|
+ strncpy(vparams.cvp_label2,vendor_labels[1],16);
|
|
+ }
|
|
+ if (ch->counts[CHET_V3]) {
|
|
+ vparams.cvp_n3 = ch->counts[CHET_V3];
|
|
+ strncpy(vparams.cvp_label3,vendor_labels[2],16);
|
|
+ }
|
|
+ if (ch->counts[CHET_V4]) {
|
|
+ vparams.cvp_n4 = ch->counts[CHET_V4];
|
|
+ strncpy(vparams.cvp_label4,vendor_labels[3],16);
|
|
+ }
|
|
+ if (copy_to_user((void *) arg, &vparams, sizeof(vparams)))
|
|
+ return -EFAULT;
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ case CHIOPOSITION:
|
|
+ {
|
|
+ struct changer_position pos;
|
|
+
|
|
+ if (copy_from_user(&pos, (void*)arg, sizeof (pos)))
|
|
+ return -EFAULT;
|
|
+
|
|
+ if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) {
|
|
+ dprintk("CHIOPOSITION: invalid parameter%s\n","");
|
|
+ return -EBADSLT;
|
|
+ }
|
|
+ down(&ch->lock);
|
|
+ retval = ch_position(ch,0,
|
|
+ ch->firsts[pos.cp_type] + pos.cp_unit,
|
|
+ pos.cp_flags & CP_INVERT);
|
|
+ up(&ch->lock);
|
|
+ return retval;
|
|
+ }
|
|
+
|
|
+ case CHIOMOVE:
|
|
+ {
|
|
+ struct changer_move mv;
|
|
+
|
|
+ if (copy_from_user(&mv, (void*)arg, sizeof (mv)))
|
|
+ return -EFAULT;
|
|
+
|
|
+ if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) ||
|
|
+ 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) {
|
|
+ dprintk("CHIOMOVE: invalid parameter%s\n","");
|
|
+ return -EBADSLT;
|
|
+ }
|
|
+
|
|
+ down(&ch->lock);
|
|
+ retval = ch_move(ch,0,
|
|
+ ch->firsts[mv.cm_fromtype] + mv.cm_fromunit,
|
|
+ ch->firsts[mv.cm_totype] + mv.cm_tounit,
|
|
+ mv.cm_flags & CM_INVERT);
|
|
+ up(&ch->lock);
|
|
+ return retval;
|
|
+ }
|
|
+
|
|
+ case CHIOEXCHANGE:
|
|
+ {
|
|
+ struct changer_exchange mv;
|
|
+
|
|
+ if (copy_from_user(&mv, (void*)arg, sizeof (mv)))
|
|
+ return -EFAULT;
|
|
+
|
|
+ if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) ||
|
|
+ 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) ||
|
|
+ 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) {
|
|
+ dprintk("CHIOEXCHANGE: invalid parameter%s\n","");
|
|
+ return -EBADSLT;
|
|
+ }
|
|
+
|
|
+ down(&ch->lock);
|
|
+ retval = ch_exchange
|
|
+ (ch,0,
|
|
+ ch->firsts[mv.ce_srctype] + mv.ce_srcunit,
|
|
+ ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit,
|
|
+ ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit,
|
|
+ mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2);
|
|
+ up(&ch->lock);
|
|
+ return retval;
|
|
+ }
|
|
+
|
|
+ case CHIOGSTATUS:
|
|
+ {
|
|
+ struct changer_element_status ces;
|
|
+
|
|
+ if (copy_from_user(&ces, (void*)arg, sizeof (ces)))
|
|
+ return -EFAULT;
|
|
+ if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES)
|
|
+ return -EINVAL;
|
|
+
|
|
+ return ch_gstatus(ch, ces.ces_type, ces.ces_data);
|
|
+ }
|
|
+
|
|
+ case CHIOGELEM:
|
|
+ {
|
|
+ struct changer_get_element cge;
|
|
+ u_char cmd[12];
|
|
+ u_char *buffer;
|
|
+ unsigned int elem;
|
|
+ int result,i;
|
|
+
|
|
+ if (copy_from_user(&cge, (void*)arg, sizeof (cge)))
|
|
+ return -EFAULT;
|
|
+
|
|
+ if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit))
|
|
+ return -EINVAL;
|
|
+ elem = ch->firsts[cge.cge_type] + cge.cge_unit;
|
|
+
|
|
+ buffer = kmalloc(512, GFP_KERNEL);
|
|
+ if (!buffer)
|
|
+ return -ENOMEM;
|
|
+ down(&ch->lock);
|
|
+
|
|
+ voltag_retry:
|
|
+ memset(cmd,0,sizeof(cmd));
|
|
+ cmd[0] = READ_ELEMENT_STATUS;
|
|
+ cmd[1] = (ch->device->lun << 5) |
|
|
+ (ch->voltags ? 0x10 : 0) |
|
|
+ ch_elem_to_typecode(ch,elem);
|
|
+ cmd[2] = (elem >> 8) & 0xff;
|
|
+ cmd[3] = elem & 0xff;
|
|
+ cmd[5] = 1;
|
|
+ cmd[9] = 255;
|
|
+
|
|
+ if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256))) {
|
|
+ cge.cge_status = buffer[18];
|
|
+ cge.cge_flags = 0;
|
|
+ if (buffer[18] & CESTATUS_EXCEPT) {
|
|
+ /* FIXME: fill cge_errno */
|
|
+ }
|
|
+ if (buffer[25] & 0x80) {
|
|
+ cge.cge_flags |= CGE_SRC;
|
|
+ if (buffer[25] & 0x40)
|
|
+ cge.cge_flags |= CGE_INVERT;
|
|
+ elem = (buffer[26]<<8) | buffer[27];
|
|
+ for (i = 0; i < 4; i++) {
|
|
+ if (elem >= ch->firsts[i] &&
|
|
+ elem < ch->firsts[i] + ch->counts[i]) {
|
|
+ cge.cge_srctype = i;
|
|
+ cge.cge_srcunit = elem-ch->firsts[i];
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ if ((buffer[22] & 0x30) == 0x30) {
|
|
+ cge.cge_flags |= CGE_IDLUN;
|
|
+ cge.cge_id = buffer[23];
|
|
+ cge.cge_lun = buffer[22] & 7;
|
|
+ }
|
|
+ if (buffer[9] & 0x80) {
|
|
+ cge.cge_flags |= CGE_PVOLTAG;
|
|
+ memcpy(cge.cge_pvoltag,buffer+28,36);
|
|
+ }
|
|
+ if (buffer[9] & 0x40) {
|
|
+ cge.cge_flags |= CGE_AVOLTAG;
|
|
+ memcpy(cge.cge_avoltag,buffer+64,36);
|
|
+ }
|
|
+ } else if (ch->voltags) {
|
|
+ ch->voltags = 0;
|
|
+ vprintk("device has no volume tag support%s\n","");
|
|
+ goto voltag_retry;
|
|
+ }
|
|
+ kfree(buffer);
|
|
+ up(&ch->lock);
|
|
+
|
|
+ if (copy_to_user((void*)arg, &cge, sizeof (cge)))
|
|
+ return -EFAULT;
|
|
+ return result;
|
|
+ }
|
|
+
|
|
+ case CHIOINITELEM:
|
|
+ {
|
|
+ down(&ch->lock);
|
|
+ retval = ch_init_elem(ch);
|
|
+ up(&ch->lock);
|
|
+ return retval;
|
|
+ }
|
|
+
|
|
+ case CHIOSVOLTAG:
|
|
+ {
|
|
+ struct changer_set_voltag csv;
|
|
+ int elem;
|
|
+
|
|
+ if (copy_from_user(&csv, (void*)arg, sizeof(csv)))
|
|
+ return -EFAULT;
|
|
+
|
|
+ if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) {
|
|
+ dprintk("CHIOSVOLTAG: invalid parameter%s\n","");
|
|
+ return -EBADSLT;
|
|
+ }
|
|
+ elem = ch->firsts[csv.csv_type] + csv.csv_unit;
|
|
+ down(&ch->lock);
|
|
+ retval = ch_set_voltag(ch, elem,
|
|
+ csv.csv_flags & CSV_AVOLTAG,
|
|
+ csv.csv_flags & CSV_CLEARTAG,
|
|
+ csv.csv_voltag);
|
|
+ up(&ch->lock);
|
|
+ return retval;
|
|
+ }
|
|
+
|
|
+ default:
|
|
+ return scsi_ioctl(ch->device, cmd, (void*)arg);
|
|
+
|
|
+ }
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_COMPAT
|
|
+
|
|
+struct changer_element_status32 {
|
|
+ int ces_type;
|
|
+ compat_uptr_t ces_data;
|
|
+};
|
|
+#define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32)
|
|
+
|
|
+static long ch_ioctl_compat(struct file * file,
|
|
+ unsigned int cmd, unsigned long arg)
|
|
+{
|
|
+ scsi_changer *ch = file->private_data;
|
|
+
|
|
+ switch (cmd) {
|
|
+ case CHIOGPARAMS:
|
|
+ case CHIOGVPARAMS:
|
|
+ case CHIOPOSITION:
|
|
+ case CHIOMOVE:
|
|
+ case CHIOEXCHANGE:
|
|
+ case CHIOGELEM:
|
|
+ case CHIOINITELEM:
|
|
+ case CHIOSVOLTAG:
|
|
+ /* compatible */
|
|
+ return ch_ioctl(NULL /* inode, unused */,
|
|
+ file, cmd, arg);
|
|
+ case CHIOGSTATUS32:
|
|
+ {
|
|
+ struct changer_element_status32 ces32;
|
|
+ unsigned char *data;
|
|
+
|
|
+ if (copy_from_user(&ces32, (void*)arg, sizeof (ces32)))
|
|
+ return -EFAULT;
|
|
+ if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
|
|
+ return -EINVAL;
|
|
+
|
|
+ data = compat_ptr(ces32.ces_data);
|
|
+ return ch_gstatus(ch, ces32.ces_type, data);
|
|
+ }
|
|
+ default:
|
|
+ // return scsi_ioctl_compat(ch->device, cmd, (void*)arg);
|
|
+ return -ENOIOCTLCMD;
|
|
+
|
|
+ }
|
|
+}
|
|
+#endif
|
|
+
|
|
+/* ------------------------------------------------------------------------ */
|
|
+
|
|
+static int ch_probe(struct device *dev)
|
|
+{
|
|
+ struct scsi_device *sd = to_scsi_device(dev);
|
|
+ scsi_changer *ch;
|
|
+
|
|
+ if (sd->type != TYPE_MEDIUM_CHANGER)
|
|
+ return -ENODEV;
|
|
+
|
|
+ ch = kmalloc(sizeof(*ch), GFP_KERNEL);
|
|
+ if (NULL == ch)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ memset(ch,0,sizeof(*ch));
|
|
+ ch->minor = ch_devcount;
|
|
+ sprintf(ch->name,"ch%d",ch->minor);
|
|
+ init_MUTEX(&ch->lock);
|
|
+ ch->device = sd;
|
|
+ ch_readconfig(ch);
|
|
+ if (init)
|
|
+ ch_init_elem(ch);
|
|
+
|
|
+ devfs_mk_cdev(MKDEV(SCSI_CHANGER_MAJOR,ch->minor),
|
|
+ S_IFCHR | S_IRUGO | S_IWUGO, ch->name);
|
|
+
|
|
+ printk(KERN_INFO "Attached scsi changer %s "
|
|
+ "at scsi%d, channel %d, id %d, lun %d\n",
|
|
+ ch->name, sd->host->host_no, sd->channel, sd->id, sd->lun);
|
|
+
|
|
+ spin_lock(&ch_devlist_lock);
|
|
+ list_add_tail(&ch->list,&ch_devlist);
|
|
+ ch_devcount++;
|
|
+ spin_unlock(&ch_devlist_lock);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ch_remove(struct device *dev)
|
|
+{
|
|
+ struct scsi_device *sd = to_scsi_device(dev);
|
|
+ scsi_changer *tmp, *ch;
|
|
+
|
|
+ spin_lock(&ch_devlist_lock);
|
|
+ ch = NULL;
|
|
+ list_for_each_entry(tmp,&ch_devlist,list) {
|
|
+ if (tmp->device == sd)
|
|
+ ch = tmp;
|
|
+ }
|
|
+ BUG_ON(NULL == ch);
|
|
+ list_del(&ch->list);
|
|
+ spin_unlock(&ch_devlist_lock);
|
|
+
|
|
+ devfs_remove(ch->name);
|
|
+ kfree(ch->dt);
|
|
+ kfree(ch);
|
|
+ ch_devcount--;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int __init init_ch_module(void)
|
|
+{
|
|
+ int rc;
|
|
+
|
|
+ printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n");
|
|
+ rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops);
|
|
+ if (rc < 0) {
|
|
+ printk("Unable to get major %d for SCSI-Changer\n",
|
|
+ SCSI_CHANGER_MAJOR);
|
|
+ return rc;
|
|
+ }
|
|
+ rc = scsi_register_driver(&ch_template.gendrv);
|
|
+ if (rc < 0)
|
|
+ goto fail1;
|
|
+ return 0;
|
|
+
|
|
+ fail1:
|
|
+ unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
|
|
+ return rc;
|
|
+}
|
|
+
|
|
+static void __exit exit_ch_module(void)
|
|
+{
|
|
+ scsi_unregister_driver(&ch_template.gendrv);
|
|
+ unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
|
|
+}
|
|
+
|
|
+module_init(init_ch_module);
|
|
+module_exit(exit_ch_module);
|
|
+
|
|
+/*
|
|
+ * Local variables:
|
|
+ * c-basic-offset: 8
|
|
+ * End:
|
|
+ */
|
|
diff -aurN a/include/linux/chio.h b/include/linux/chio.h
|
|
--- a/include/linux/chio.h 1969-12-31 19:00:00.000000000 -0500
|
|
+++ b/include/linux/chio.h 2005-06-15 22:00:21.000000000 -0400
|
|
@@ -0,0 +1,168 @@
|
|
+/*
|
|
+ * ioctl interface for the scsi media changer driver
|
|
+ */
|
|
+
|
|
+/* changer element types */
|
|
+#define CHET_MT 0 /* media transport element (robot) */
|
|
+#define CHET_ST 1 /* storage element (media slots) */
|
|
+#define CHET_IE 2 /* import/export element */
|
|
+#define CHET_DT 3 /* data transfer element (tape/cdrom/whatever) */
|
|
+#define CHET_V1 4 /* vendor specific #1 */
|
|
+#define CHET_V2 5 /* vendor specific #2 */
|
|
+#define CHET_V3 6 /* vendor specific #3 */
|
|
+#define CHET_V4 7 /* vendor specific #4 */
|
|
+
|
|
+
|
|
+/*
|
|
+ * CHIOGPARAMS
|
|
+ * query changer properties
|
|
+ *
|
|
+ * CHIOVGPARAMS
|
|
+ * query vendor-specific element types
|
|
+ *
|
|
+ * accessing elements works by specifing type and unit of the element.
|
|
+ * for eample, storage elements are addressed with type = CHET_ST and
|
|
+ * unit = 0 .. cp_nslots-1
|
|
+ *
|
|
+ */
|
|
+struct changer_params {
|
|
+ int cp_curpicker; /* current transport element */
|
|
+ int cp_npickers; /* number of transport elements (CHET_MT) */
|
|
+ int cp_nslots; /* number of storage elements (CHET_ST) */
|
|
+ int cp_nportals; /* number of import/export elements (CHET_IE) */
|
|
+ int cp_ndrives; /* number of data transfer elements (CHET_DT) */
|
|
+};
|
|
+struct changer_vendor_params {
|
|
+ int cvp_n1; /* number of vendor specific elems (CHET_V1) */
|
|
+ char cvp_label1[16];
|
|
+ int cvp_n2; /* number of vendor specific elems (CHET_V2) */
|
|
+ char cvp_label2[16];
|
|
+ int cvp_n3; /* number of vendor specific elems (CHET_V3) */
|
|
+ char cvp_label3[16];
|
|
+ int cvp_n4; /* number of vendor specific elems (CHET_V4) */
|
|
+ char cvp_label4[16];
|
|
+ int reserved[8];
|
|
+};
|
|
+
|
|
+
|
|
+/*
|
|
+ * CHIOMOVE
|
|
+ * move a medium from one element to another
|
|
+ */
|
|
+struct changer_move {
|
|
+ int cm_fromtype; /* type/unit of source element */
|
|
+ int cm_fromunit;
|
|
+ int cm_totype; /* type/unit of destination element */
|
|
+ int cm_tounit;
|
|
+ int cm_flags;
|
|
+};
|
|
+#define CM_INVERT 1 /* flag: rotate media (for double-sided like MOD) */
|
|
+
|
|
+
|
|
+/*
|
|
+ * CHIOEXCHANGE
|
|
+ * move one medium from element #1 to element #2,
|
|
+ * and another one from element #2 to element #3.
|
|
+ * element #1 and #3 are allowed to be identical.
|
|
+ */
|
|
+struct changer_exchange {
|
|
+ int ce_srctype; /* type/unit of element #1 */
|
|
+ int ce_srcunit;
|
|
+ int ce_fdsttype; /* type/unit of element #2 */
|
|
+ int ce_fdstunit;
|
|
+ int ce_sdsttype; /* type/unit of element #3 */
|
|
+ int ce_sdstunit;
|
|
+ int ce_flags;
|
|
+};
|
|
+#define CE_INVERT1 1
|
|
+#define CE_INVERT2 2
|
|
+
|
|
+
|
|
+/*
|
|
+ * CHIOPOSITION
|
|
+ * move the transport element (robot arm) to a specific element.
|
|
+ */
|
|
+struct changer_position {
|
|
+ int cp_type;
|
|
+ int cp_unit;
|
|
+ int cp_flags;
|
|
+};
|
|
+#define CP_INVERT 1
|
|
+
|
|
+
|
|
+/*
|
|
+ * CHIOGSTATUS
|
|
+ * get element status for all elements of a specific type
|
|
+ */
|
|
+struct changer_element_status {
|
|
+ int ces_type;
|
|
+ unsigned char *ces_data;
|
|
+};
|
|
+#define CESTATUS_FULL 0x01 /* full */
|
|
+#define CESTATUS_IMPEXP 0x02 /* media was imported (inserted by sysop) */
|
|
+#define CESTATUS_EXCEPT 0x04 /* error condition */
|
|
+#define CESTATUS_ACCESS 0x08 /* access allowed */
|
|
+#define CESTATUS_EXENAB 0x10 /* element can export media */
|
|
+#define CESTATUS_INENAB 0x20 /* element can import media */
|
|
+
|
|
+
|
|
+/*
|
|
+ * CHIOGELEM
|
|
+ * get more detailed status informtion for a single element
|
|
+ */
|
|
+struct changer_get_element {
|
|
+ int cge_type; /* type/unit */
|
|
+ int cge_unit;
|
|
+ int cge_status; /* status */
|
|
+ int cge_errno; /* errno */
|
|
+ int cge_srctype; /* source element of the last move/exchange */
|
|
+ int cge_srcunit;
|
|
+ int cge_id; /* scsi id (for data transfer elements) */
|
|
+ int cge_lun; /* scsi lun (for data transfer elements) */
|
|
+ char cge_pvoltag[36]; /* primary volume tag */
|
|
+ char cge_avoltag[36]; /* alternate volume tag */
|
|
+ int cge_flags;
|
|
+};
|
|
+/* flags */
|
|
+#define CGE_ERRNO 0x01 /* errno available */
|
|
+#define CGE_INVERT 0x02 /* media inverted */
|
|
+#define CGE_SRC 0x04 /* media src available */
|
|
+#define CGE_IDLUN 0x08 /* ID+LUN available */
|
|
+#define CGE_PVOLTAG 0x10 /* primary volume tag available */
|
|
+#define CGE_AVOLTAG 0x20 /* alternate volume tag available */
|
|
+
|
|
+
|
|
+/*
|
|
+ * CHIOSVOLTAG
|
|
+ * set volume tag
|
|
+ */
|
|
+struct changer_set_voltag {
|
|
+ int csv_type; /* type/unit */
|
|
+ int csv_unit;
|
|
+ char csv_voltag[36]; /* volume tag */
|
|
+ int csv_flags;
|
|
+};
|
|
+#define CSV_PVOLTAG 0x01 /* primary volume tag */
|
|
+#define CSV_AVOLTAG 0x02 /* alternate volume tag */
|
|
+#define CSV_CLEARTAG 0x04 /* clear volume tag */
|
|
+
|
|
+/* ioctls */
|
|
+#define CHIOMOVE _IOW('c', 1,struct changer_move)
|
|
+#define CHIOEXCHANGE _IOW('c', 2,struct changer_exchange)
|
|
+#define CHIOPOSITION _IOW('c', 3,struct changer_position)
|
|
+#define CHIOGPICKER _IOR('c', 4,int) /* not impl. */
|
|
+#define CHIOSPICKER _IOW('c', 5,int) /* not impl. */
|
|
+#define CHIOGPARAMS _IOR('c', 6,struct changer_params)
|
|
+#define CHIOGSTATUS _IOW('c', 8,struct changer_element_status)
|
|
+#define CHIOGELEM _IOW('c',16,struct changer_get_element)
|
|
+#define CHIOINITELEM _IO('c',17)
|
|
+#define CHIOSVOLTAG _IOW('c',18,struct changer_set_voltag)
|
|
+#define CHIOGVPARAMS _IOR('c',19,struct changer_vendor_params)
|
|
+
|
|
+/* ---------------------------------------------------------------------- */
|
|
+
|
|
+/*
|
|
+ * Local variables:
|
|
+ * c-basic-offset: 8
|
|
+ * End:
|
|
+ */
|
|
diff -aurN a/include/linux/major.h b/include/linux/major.h
|
|
--- a/include/linux/major.h 2005-06-06 11:22:29.000000000 -0400
|
|
+++ b/include/linux/major.h 2005-06-15 22:00:21.000000000 -0400
|
|
@@ -100,6 +100,7 @@
|
|
#define I2O_MAJOR 80 /* 80->87 */
|
|
|
|
#define SHMIQ_MAJOR 85 /* Linux/mips, SGI /dev/shmiq */
|
|
+#define SCSI_CHANGER_MAJOR 86
|
|
|
|
#define IDE6_MAJOR 88
|
|
#define IDE7_MAJOR 89
|
|
diff -aurN a/include/scsi/scsi.h b/include/scsi/scsi.h
|
|
--- a/include/scsi/scsi.h 2005-06-06 11:22:29.000000000 -0400
|
|
+++ b/include/scsi/scsi.h 2005-06-15 22:00:21.000000000 -0400
|
|
@@ -41,6 +41,7 @@
|
|
#define FORMAT_UNIT 0x04
|
|
#define READ_BLOCK_LIMITS 0x05
|
|
#define REASSIGN_BLOCKS 0x07
|
|
+#define INITIALIZE_ELEMENT_STATUS 0x07
|
|
#define READ_6 0x08
|
|
#define WRITE_6 0x0a
|
|
#define SEEK_6 0x0b
|
|
@@ -65,6 +66,7 @@
|
|
#define READ_10 0x28
|
|
#define WRITE_10 0x2a
|
|
#define SEEK_10 0x2b
|
|
+#define POSITION_TO_ELEMENT 0x2b
|
|
#define WRITE_VERIFY 0x2e
|
|
#define VERIFY 0x2f
|
|
#define SEARCH_HIGH 0x30
|
|
@@ -97,6 +99,7 @@
|
|
#define PERSISTENT_RESERVE_OUT 0x5f
|
|
#define REPORT_LUNS 0xa0
|
|
#define MOVE_MEDIUM 0xa5
|
|
+#define EXCHANGE_MEDIUM 0xa6
|
|
#define READ_12 0xa8
|
|
#define WRITE_12 0xaa
|
|
#define WRITE_VERIFY_12 0xae
|