diff options
| -rw-r--r-- | Documentation/scsi/osst.txt | 218 | ||||
| -rw-r--r-- | MAINTAINERS | 10 | ||||
| -rw-r--r-- | drivers/scsi/Kconfig | 22 | ||||
| -rw-r--r-- | drivers/scsi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/scsi/osst.c | 6107 | ||||
| -rw-r--r-- | drivers/scsi/osst.h | 651 | ||||
| -rw-r--r-- | drivers/scsi/osst_detect.h | 7 | ||||
| -rw-r--r-- | drivers/scsi/osst_options.h | 107 | ||||
| -rw-r--r-- | drivers/scsi/st.c | 6 |
9 files changed, 3 insertions, 7126 deletions
diff --git a/Documentation/scsi/osst.txt b/Documentation/scsi/osst.txt deleted file mode 100644 index 00c8ebb2fd18..000000000000 --- a/Documentation/scsi/osst.txt +++ /dev/null @@ -1,218 +0,0 @@ -README file for the osst driver -=============================== -(w) Kurt Garloff <garloff@suse.de> 12/2000 - -This file describes the osst driver as of version 0.8.x/0.9.x, the released -version of the osst driver. -It is intended to help advanced users to understand the role of osst and to -get them started using (and maybe debugging) it. -It won't address issues like "How do I compile a kernel?" or "How do I load -a module?", as these are too basic. -Once the OnStream got merged into the official kernel, the distro makers -will provide the OnStream support for those who are not familiar with -hacking their kernels. - - -Purpose -------- -The osst driver was developed, because the standard SCSI tape driver in -Linux, st, does not support the OnStream SC-x0 SCSI tape. The st is not to -blame for that, as the OnStream tape drives do not support the standard SCSI -command set for Serial Access Storage Devices (SASDs), which basically -corresponds to the QIC-157 spec. -Nevertheless, the OnStream tapes are nice pieces of hardware and therefore -the osst driver has been written to make these tape devs supported by Linux. -The driver is free software. It's released under the GNU GPL and planned to -be integrated into the mainstream kernel. - - -Implementation --------------- -The osst is a new high-level SCSI driver, just like st, sr, sd and sg. It -can be compiled into the kernel or loaded as a module. -As it represents a new device, it got assigned a new device node: /dev/osstX -are character devices with major no 206 and minor numbers like the /dev/stX -devices. If those are not present, you may create them by calling -Makedevs.sh as root (see below). -The driver started being a copy of st and as such, the osst devices' -behavior looks very much the same as st to the userspace applications. - - -History -------- -In the first place, osst shared its identity very much with st. That meant -that it used the same kernel structures and the same device node as st. -So you could only have either of them being present in the kernel. This has -been fixed by registering an own device, now. -st and osst can coexist, each only accessing the devices it can support by -themselves. - - -Installation ------------- -osst got integrated into the linux kernel. Select it during kernel -configuration as module or compile statically into the kernel. -Compile your kernel and install the modules. - -Now, your osst driver is inside the kernel or available as a module, -depending on your choice during kernel config. You may still need to create -the device nodes by calling the Makedevs.sh script (see below) manually. - -To load your module, you may use the command -modprobe osst -as root. dmesg should show you, whether your OnStream tapes have been -recognized. - -If you want to have the module autoloaded on access to /dev/osst, you may -add something like -alias char-major-206 osst -to a file under /etc/modprobe.d/ directory. - -You may find it convenient to create a symbolic link -ln -s nosst0 /dev/tape -to make programs assuming a default name of /dev/tape more convenient to -use. - -The device nodes for osst have to be created. Use the Makedevs.sh script -attached to this file. - - -Using it --------- -You may use the OnStream tape driver with your standard backup software, -which may be tar, cpio, amanda, arkeia, BRU, Lone Tar, ... -by specifying /dev/(n)osst0 as the tape device to use or using the above -symlink trick. The IOCTLs to control tape operation are also mostly -supported and you may try the mt (or mt_st) program to jump between -filemarks, eject the tape, ... - -There's one limitation: You need to use a block size of 32kB. - -(This limitation is worked on and will be fixed in version 0.8.8 of - this driver.) - -If you just want to get started with standard software, here is an example -for creating and restoring a full backup: -# Backup -tar cvf - / --exclude /proc | buffer -s 32k -m 24M -B -t -o /dev/nosst0 -# Restore -buffer -s 32k -m 8M -B -t -i /dev/osst0 | tar xvf - -C / - -The buffer command has been used to buffer the data before it goes to the -tape (or the file system) in order to smooth out the data stream and prevent -the tape from needing to stop and rewind. The OnStream does have an internal -buffer and a variable speed which help this, but especially on writing, the -buffering still proves useful in most cases. It also pads the data to -guarantees the block size of 32k. (Otherwise you may pass the -b64 option to -tar.) -Expect something like 1.8MB/s for the SC-x0 drives and 0.9MB/s for the DI-30. -The USB drive will give you about 0.7MB/s. -On a fast machine, you may profit from software data compression (z flag for -tar). - - -USB and IDE ------------ -Via the SCSI emulation layers usb-storage and ide-scsi, you can also use the -osst driver to drive the USB-30 and the DI-30 drives. (Unfortunately, there -is no such layer for the parallel port, otherwise the DP-30 would work as -well.) For the USB support, you need the latest 2.4.0-test kernels and the -latest usb-storage driver from -http://www.linux-usb.org/ -http://sourceforge.net/cvs/?group_id=3581 - -Note that the ide-tape driver as of 1.16f uses a slightly outdated on-tape -format and therefore is not completely interoperable with osst tapes. - -The ADR-x0 line is fully SCSI-2 compliant and is supported by st, not osst. -The on-tape format is supposed to be compatible with the one used by osst. - - -Feedback and updates --------------------- -The driver development is coordinated through a mailing list -<osst@linux1.onstream.nl> -a CVS repository and some web pages. -The tester's pages which contain recent news and updated drivers to download -can be found on -http://sourceforge.net/projects/osst/ - -If you find any problems, please have a look at the tester's page in order -to see whether the problem is already known and solved. Otherwise, please -report it to the mailing list. Your feedback is welcome. (This holds also -for reports of successful usage, of course.) -In case of trouble, please do always provide the following info: -* driver and kernel version used (see syslog) -* driver messages (syslog) -* SCSI config and OnStream Firmware (/proc/scsi/scsi) -* description of error. Is it reproducible? -* software and commands used - -You may subscribe to the mailing list, BTW, it's a majordomo list. - - -Status ------- -0.8.0 was the first widespread BETA release. Since then a lot of reports -have been sent, but mostly reported success or only minor trouble. -All the issues have been addressed. -Check the web pages for more info about the current developments. -0.9.x is the tree for the 2.3/2.4 kernel. - - -Acknowledgments ----------------- -The driver has been started by making a copy of Kai Makisara's st driver. -Most of the development has been done by Willem Riede. The presence of the -userspace program osg (onstreamsg) from Terry Hardie has been rather -helpful. The same holds for Gadi Oxman's ide-tape support for the DI-30. -I did add some patches to those drivers as well and coordinated things a -little bit. -Note that most of them did mostly spend their spare time for the creation of -this driver. -The people from OnStream, especially Jack Bombeeck did support this project -and always tried to answer HW or FW related questions. Furthermore, he -pushed the FW developers to do the right things. -SuSE did support this project by allowing me to work on it during my working -time for them and by integrating the driver into their distro. - -More people did help by sending useful comments. Sorry to those who have -been forgotten. Thanks to all the GNU/FSF and Linux developers who made this -platform such an interesting, nice and stable platform. -Thanks go to those who tested the drivers and did send useful reports. Your -help is needed! - - -Makedevs.sh ------------ -#!/bin/sh -# Script to create OnStream SC-x0 device nodes (major 206) -# Usage: Makedevs.sh [nos [path to dev]] -# $Id: README.osst.kernel,v 1.4 2000/12/20 14:13:15 garloff Exp $ -major=206 -nrs=4 -dir=/dev -test -z "$1" || nrs=$1 -test -z "$2" || dir=$2 -declare -i nr -nr=0 -test -d $dir || mkdir -p $dir -while test $nr -lt $nrs; do - mknod $dir/osst$nr c $major $nr - chown 0.disk $dir/osst$nr; chmod 660 $dir/osst$nr; - mknod $dir/nosst$nr c $major $[nr+128] - chown 0.disk $dir/nosst$nr; chmod 660 $dir/nosst$nr; - mknod $dir/osst${nr}l c $major $[nr+32] - chown 0.disk $dir/osst${nr}l; chmod 660 $dir/osst${nr}l; - mknod $dir/nosst${nr}l c $major $[nr+160] - chown 0.disk $dir/nosst${nr}l; chmod 660 $dir/nosst${nr}l; - mknod $dir/osst${nr}m c $major $[nr+64] - chown 0.disk $dir/osst${nr}m; chmod 660 $dir/osst${nr}m; - mknod $dir/nosst${nr}m c $major $[nr+192] - chown 0.disk $dir/nosst${nr}m; chmod 660 $dir/nosst${nr}m; - mknod $dir/osst${nr}a c $major $[nr+96] - chown 0.disk $dir/osst${nr}a; chmod 660 $dir/osst${nr}a; - mknod $dir/nosst${nr}a c $major $[nr+224] - chown 0.disk $dir/nosst${nr}a; chmod 660 $dir/nosst${nr}a; - let nr+=1 -done diff --git a/MAINTAINERS b/MAINTAINERS index 5cfbea4ce575..adfb7ffb40ca 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11662,16 +11662,6 @@ S: Maintained F: drivers/mtd/nand/onenand/ F: include/linux/mtd/onenand*.h -ONSTREAM SCSI TAPE DRIVER -M: Willem Riede <osst@riede.org> -L: osst-users@lists.sourceforge.net -L: linux-scsi@vger.kernel.org -S: Maintained -F: Documentation/scsi/osst.txt -F: drivers/scsi/osst.* -F: drivers/scsi/osst_*.h -F: drivers/scsi/st.h - OP-TEE DRIVER M: Jens Wiklander <jens.wiklander@linaro.org> S: Maintained diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index d528018e6fa8..d81edb6ae9e3 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -98,28 +98,6 @@ config CHR_DEV_ST To compile this driver as a module, choose M here and read <file:Documentation/scsi/scsi.txt>. The module will be called st. -config CHR_DEV_OSST - tristate "SCSI OnStream SC-x0 tape support" - depends on SCSI - ---help--- - The OnStream SC-x0 SCSI tape drives cannot be driven by the - standard st driver, but instead need this special osst driver and - use the /dev/osstX char device nodes (major 206). Via usb-storage, - you may be able to drive the USB-x0 and DI-x0 drives as well. - Note that there is also a second generation of OnStream - tape drives (ADR-x0) that supports the standard SCSI-2 commands for - tapes (QIC-157) and can be driven by the standard driver st. - For more information, you may have a look at the SCSI-HOWTO - <http://www.tldp.org/docs.html#howto> and - <file:Documentation/scsi/osst.txt> in the kernel source. - More info on the OnStream driver may be found on - <http://sourceforge.net/projects/osst/> - Please also have a look at the standard st docu, as most of it - applies to osst as well. - - To compile this driver as a module, choose M here and read - <file:Documentation/scsi/scsi.txt>. The module will be called osst. - config BLK_DEV_SR tristate "SCSI CDROM support" depends on SCSI && BLK_DEV diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 8826111fdf4a..f69ee35af2c8 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -143,7 +143,6 @@ obj-$(CONFIG_SCSI_WD719X) += wd719x.o obj-$(CONFIG_ARM) += arm/ obj-$(CONFIG_CHR_DEV_ST) += st.o -obj-$(CONFIG_CHR_DEV_OSST) += osst.o obj-$(CONFIG_BLK_DEV_SD) += sd_mod.o obj-$(CONFIG_BLK_DEV_SR) += sr_mod.o obj-$(CONFIG_CHR_DEV_SG) += sg.o diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c deleted file mode 100644 index 4bad54463eb2..000000000000 --- a/drivers/scsi/osst.c +++ /dev/null @@ -1,6107 +0,0 @@ -/* - SCSI Tape Driver for Linux version 1.1 and newer. See the accompanying - file Documentation/scsi/st.txt for more information. - - History: - - OnStream SCSI Tape support (osst) cloned from st.c by - Willem Riede (osst@riede.org) Feb 2000 - Fixes ... Kurt Garloff <garloff@suse.de> Mar 2000 - - Rewritten from Dwayne Forsyth's SCSI tape driver by Kai Makisara. - Contribution and ideas from several people including (in alphabetical - order) Klaus Ehrenfried, Wolfgang Denk, Steve Hirsch, Andreas Koppenh"ofer, - Michael Leodolter, Eyal Lebedinsky, J"org Weule, and Eric Youngdale. - - Copyright 1992 - 2002 Kai Makisara / 2000 - 2006 Willem Riede - email osst@riede.org - - $Header: /cvsroot/osst/Driver/osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $ - - Microscopic alterations - Rik Ling, 2000/12/21 - Last st.c sync: Tue Oct 15 22:01:04 2002 by makisara - Some small formal changes - aeb, 950809 -*/ - -static const char * cvsid = "$Id: osst.c,v 1.73 2005/01/01 21:13:34 wriede Exp $"; -static const char * osst_version = "0.99.4"; - -/* The "failure to reconnect" firmware bug */ -#define OSST_FW_NEED_POLL_MIN 10601 /*(107A)*/ -#define OSST_FW_NEED_POLL_MAX 10704 /*(108D)*/ -#define OSST_FW_NEED_POLL(x,d) ((x) >= OSST_FW_NEED_POLL_MIN && (x) <= OSST_FW_NEED_POLL_MAX && d->host->this_id != 7) - -#include <linux/module.h> - -#include <linux/fs.h> -#include <linux/kernel.h> -#include <linux/sched/signal.h> -#include <linux/proc_fs.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/mtio.h> -#include <linux/ioctl.h> -#include <linux/fcntl.h> -#include <linux/spinlock.h> -#include <linux/vmalloc.h> -#include <linux/blkdev.h> -#include <linux/moduleparam.h> -#include <linux/delay.h> -#include <linux/jiffies.h> -#include <linux/mutex.h> -#include <linux/uaccess.h> -#include <asm/dma.h> - -/* The driver prints some debugging information on the console if DEBUG - is defined and non-zero. */ -#define DEBUG 0 - -/* The message level for the debug messages is currently set to KERN_NOTICE - so that people can easily see the messages. Later when the debugging messages - in the drivers are more widely classified, this may be changed to KERN_DEBUG. */ -#define OSST_DEB_MSG KERN_NOTICE - -#include <scsi/scsi.h> -#include <scsi/scsi_dbg.h> -#include <scsi/scsi_device.h> -#include <scsi/scsi_driver.h> -#include <scsi/scsi_eh.h> -#include <scsi/scsi_host.h> -#include <scsi/scsi_ioctl.h> - -#define ST_KILOBYTE 1024 - -#include "st.h" -#include "osst.h" -#include "osst_options.h" -#include "osst_detect.h" - -static DEFINE_MUTEX(osst_int_mutex); -static int max_dev = 0; -static int write_threshold_kbs = 0; -static int max_sg_segs = 0; - -#ifdef MODULE -MODULE_AUTHOR("Willem Riede"); -MODULE_DESCRIPTION("OnStream {DI-|FW-|SC-|USB}{30|50} Tape Driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV_MAJOR(OSST_MAJOR); -MODULE_ALIAS_SCSI_DEVICE(TYPE_TAPE); - -module_param(max_dev, int, 0444); -MODULE_PARM_DESC(max_dev, "Maximum number of OnStream Tape Drives to attach (4)"); - -module_param(write_threshold_kbs, int, 0644); -MODULE_PARM_DESC(write_threshold_kbs, "Asynchronous write threshold (KB; 32)"); - -module_param(max_sg_segs, int, 0644); -MODULE_PARM_DESC(max_sg_segs, "Maximum number of scatter/gather segments to use (9)"); -#else -static struct osst_dev_parm { - char *name; - int *val; -} parms[] __initdata = { - { "max_dev", &max_dev }, - { "write_threshold_kbs", &write_threshold_kbs }, - { "max_sg_segs", &max_sg_segs } -}; -#endif - -/* Some default definitions have been moved to osst_options.h */ -#define OSST_BUFFER_SIZE (OSST_BUFFER_BLOCKS * ST_KILOBYTE) -#define OSST_WRITE_THRESHOLD (OSST_WRITE_THRESHOLD_BLOCKS * ST_KILOBYTE) - -/* The buffer size should fit into the 24 bits for length in the - 6-byte SCSI read and write commands. */ -#if OSST_BUFFER_SIZE >= (2 << 24 - 1) -#error "Buffer size should not exceed (2 << 24 - 1) bytes!" -#endif - -#if DEBUG -static int debugging = 1; -/* uncomment define below to test error recovery */ -// #define OSST_INJECT_ERRORS 1 -#endif - -/* Do not retry! The drive firmware already retries when appropriate, - and when it tries to tell us something, we had better listen... */ -#define MAX_RETRIES 0 - -#define NO_TAPE NOT_READY - -#define OSST_WAIT_POSITION_COMPLETE (HZ > 200 ? HZ / 200 : 1) -#define OSST_WAIT_WRITE_COMPLETE (HZ / 12) -#define OSST_WAIT_LONG_WRITE_COMPLETE (HZ / 2) - -#define OSST_TIMEOUT (200 * HZ) -#define OSST_LONG_TIMEOUT (1800 * HZ) - -#define TAPE_NR(x) (iminor(x) & ((1 << ST_MODE_SHIFT)-1)) -#define TAPE_MODE(x) ((iminor(x) & ST_MODE_MASK) >> ST_MODE_SHIFT) -#define TAPE_REWIND(x) ((iminor(x) & 0x80) == 0) -#define TAPE_IS_RAW(x) (TAPE_MODE(x) & (ST_NBR_MODES >> 1)) - -/* Internal ioctl to set both density (uppermost 8 bits) and blocksize (lower - 24 bits) */ -#define SET_DENS_AND_BLK 0x10001 - -static int osst_buffer_size = OSST_BUFFER_SIZE; -static int osst_write_threshold = OSST_WRITE_THRESHOLD; -static int osst_max_sg_segs = OSST_MAX_SG; -static int osst_max_dev = OSST_MAX_TAPES; -static int osst_nr_dev; - -static struct osst_tape **os_scsi_tapes = NULL; -static DEFINE_RWLOCK(os_scsi_tapes_lock); - -static int modes_defined = 0; - -static struct osst_buffer *new_tape_buffer(int, int, int); -static int enlarge_buffer(struct osst_buffer *, int); -static void normalize_buffer(struct osst_buffer *); -static int append_to_buffer(const char __user *, struct osst_buffer *, int); -static int from_buffer(struct osst_buffer *, char __user *, int); -static int osst_zero_buffer_tail(struct osst_buffer *); -static int osst_copy_to_buffer(struct osst_buffer *, unsigned char *); -static int osst_copy_from_buffer(struct osst_buffer *, unsigned char *); - -static int osst_probe(struct device *); -static int osst_remove(struct device *); - -static struct scsi_driver osst_template = { - .gendrv = { - .name = "osst", - .owner = THIS_MODULE, - .probe = osst_probe, - .remove = osst_remove, - } -}; - -static int osst_int_ioctl(struct osst_tape *STp, struct osst_request ** aSRpnt, - unsigned int cmd_in, unsigned long arg); - -static int osst_set_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt, int frame, int skip); - -static int osst_get_frame_position(struct osst_tape *STp, struct osst_request ** aSRpnt); - -static int osst_flush_write_buffer(struct osst_tape *STp, struct osst_request ** aSRpnt); - -static int osst_write_error_recovery(struct osst_tape * STp, struct osst_request ** aSRpnt, int pending); - -static inline char *tape_name(struct osst_tape *tape) -{ - return tape->drive->disk_name; -} - -/* Routines that handle the interaction with mid-layer SCSI routines */ - - -/* Normalize Sense */ -static void osst_analyze_sense(struct osst_request *SRpnt, struct st_cmdstatus *s) -{ - const u8 *ucp; - const u8 *sense = SRpnt->sense; - - s->have_sense = scsi_normalize_sense(SRpnt->sense, - SCSI_SENSE_BUFFERSIZE, &s->sense_hdr); - s->flags = 0; - - if (s->have_sense) { - s->deferred = 0; - s->remainder_valid = - scsi_get_sense_info_fld(sense, SCSI_SENSE_BUFFERSIZE, &s->uremainder64); - switch (sense[0] & 0x7f) { - case 0x71: - s->deferred = 1; - /* fall through */ - case 0x70: - s->fixed_format = 1; - s->flags = sense[2] & 0xe0; - break; - case 0x73: - s->deferred = 1; - /* fall through */ - case 0x72: - s->fixed_format = 0; - ucp = scsi_sense_desc_find(sense, SCSI_SENSE_BUFFERSIZE, 4); - s->flags = ucp ? (ucp[3] & 0xe0) : 0; - break; - } - } -} - -/* Convert the result to success code */ -static int osst_chk_result(struct osst_tape * STp, struct osst_request * SRpnt) -{ - char *name = tape_name(STp); - int result = SRpnt->result; - u8 * sense = SRpnt->sense, scode; -#if DEBUG - const char *stp; -#endif - struct st_cmdstatus *cmdstatp; - - if (!result) - return 0; - - cmdstatp = &STp->buffer->cmdstat; - osst_analyze_sense(SRpnt, cmdstatp); - - if (cmdstatp->have_sense) - scode = STp->buffer->cmdstat.sense_hdr.sense_key; - else - scode = 0; -#if DEBUG - if (debugging) { - printk(OSST_DEB_MSG "%s:D: Error: %x, cmd: %x %x %x %x %x %x\n", - name, result, - SRpnt->cmd[0], SRpnt->cmd[1], SRpnt->cmd[2], - SRpnt->cmd[3], SRpnt->cmd[4], SRpnt->cmd[5]); - if (scode) printk(OSST_DEB_MSG "%s:D: Sense: %02x, ASC: %02x, ASCQ: %02x\n", - name, scode, sense[12], sense[13]); - if (cmdstatp->have_sense) - __scsi_print_sense(STp->device, name, - SRpnt->sense, SCSI_SENSE_BUFFERSIZE); - } - else -#endif - if (cmdstatp->have_sense && ( - scode != NO_SENSE && - scode != RECOVERED_ERROR && -/* scode != UNIT_ATTENTION && */ - scode != BLANK_CHECK && - scode != VOLUME_OVERFLOW && - SRpnt->cmd[0] != MODE_SENSE && - SRpnt->cmd[0] != TEST_UNIT_READY)) { /* Abnormal conditions for tape */ - if (cmdstatp->have_sense) { - printk(KERN_WARNING "%s:W: Command with sense data:\n", name); - __scsi_print_sense(STp->device, name, - SRpnt->sense, SCSI_SENSE_BUFFERSIZE); - } - else { - static int notyetprinted = 1; - - printk(KERN_WARNING - "%s:W: Warning %x (driver bt 0x%x, host bt 0x%x).\n", - name, result, driver_byte(result), - host_byte(result)); - if (notyetprinted) { - notyetprinted = 0; - printk(KERN_INFO - "%s:I: This warning may be caused by your scsi controller,\n", name); - printk(KERN_INFO - "%s:I: it has been reported with some Buslogic cards.\n", name); - } - } - } - STp->pos_unknown |= STp->device->was_reset; - - if (cmdstatp->have_sense && scode == RECOVERED_ERROR) { - STp->recover_count++; - STp->recover_erreg++; -#if DEBUG - if (debugging) { - if (SRpnt->cmd[0] == READ_6) - stp = "read"; - else if (SRpnt->cmd[0] == WRITE_6) - stp = "write"; - else - stp = "ioctl"; - printk(OSST_DEB_MSG "%s:D: Recovered %s error (%d).\n", name, stp, - STp->recover_count); - } -#endif - if ((sense[2] & 0xe0) == 0) - return 0; - } - return (-EIO); -} - - -/* Wakeup from interrupt */ -static void osst_end_async(struct request *req, blk_status_t status) -{ - struct scsi_request *rq = scsi_req(req); - struct osst_request *SRpnt = req->end_io_data; - struct osst_tape *STp = SRpnt->stp; - struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; - - STp->buffer->cmdstat.midlevel_result = SRpnt->result = rq->result; -#if DEBUG - STp->write_pending = 0; -#endif - if (rq->sense_len) - memcpy(SRpnt->sense, rq->sense, SCSI_SENSE_BUFFERSIZE); - if (SRpnt->waiting) - complete(SRpnt->waiting); - - if (SRpnt->bio) { - kfree(mdata->pages); - blk_rq_unmap_user(SRpnt->bio); - } - - blk_put_request(req); -} - -/* osst_request memory management */ -static struct osst_request *osst_allocate_request(void) -{ - return kzalloc(sizeof(struct osst_request), GFP_KERNEL); -} - -static void osst_release_request(struct osst_request *streq) -{ - kfree(streq); -} - -static int osst_execute(struct osst_request *SRpnt, const unsigned char *cmd, - int cmd_len, int data_direction, void *buffer, unsigned bufflen, - int use_sg, int timeout, int retries) -{ - struct request *req; - struct scsi_request *rq; - struct page **pages = NULL; - struct rq_map_data *mdata = &SRpnt->stp->buffer->map_data; - - int err = 0; - int write = (data_direction == DMA_TO_DEVICE); - - req = blk_get_request(SRpnt->stp->device->request_queue, - write ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, 0); - if (IS_ERR(req)) - return DRIVER_ERROR << 24; - - rq = scsi_req(req); - req->rq_flags |= RQF_QUIET; - - SRpnt->bio = NULL; - - if (use_sg) { - struct scatterlist *sg, *sgl = (struct scatterlist *)buffer; - int i; - - pages = kcalloc(use_sg, sizeof(struct page *), GFP_KERNEL); - if (!pages) - goto free_req; - - for_each_sg(sgl, sg, use_sg, i) - pages[i] = sg_page(sg); - - mdata->null_mapped = 1; - - mdata->page_order = get_order(sgl[0].length); - mdata->nr_entries = - DIV_ROUND_UP(bufflen, PAGE_SIZE << mdata->page_order); - mdata->offset = 0; - - err = blk_rq_map_user(req->q, req, mdata, NULL, bufflen, GFP_KERNEL); - if (err) { - kfree(pages); - goto free_req; - } - SRpnt->bio = req->bio; - mdata->pages = pages; - - } else if (bufflen) { - err = blk_rq_map_kern(req->q, req, buffer, bufflen, GFP_KERNEL); - if (err) - goto free_req; - } - - rq->cmd_len = cmd_len; - memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */ - memcpy(rq->cmd, cmd, rq->cmd_len); - req->timeout = timeout; - rq->retries = retries; - req->end_io_data = SRpnt; - - blk_execute_rq_nowait(req->q, NULL, req, 1, osst_end_async); - return 0; -free_req: - blk_put_request(req); - return DRIVER_ERROR << 24; -} - -/* Do the scsi command. Waits until command performed if do_wait is true. - Otherwise osst_write_behind_check() is used to check that the command - has finished. */ -static struct osst_request * osst_do_scsi(struct osst_request *SRpnt, struct osst_tape *STp, - unsigned char *cmd, int bytes, int direction, int timeout, int retries, int do_wait) -{ - unsigned char *bp; - unsigned short use_sg; -#ifdef OSST_INJECT_ERRORS - static int inject = 0; - static int repeat = 0; -#endif - struct completion *waiting; - - /* if async, make sure there's no command outstanding */ - if (!do_wait && ((STp->buffer)->last_SRpnt)) { - printk(KERN_ERR "%s: Async command already active.\n", - tape_name(STp)); - if (signal_pending(current)) - (STp->buffer)->syscall_result = (-EINTR); - else - (STp->buffer)->syscall_result = (-EBUSY); - return NULL; - } - - if (SRpnt == NULL) { - SRpnt = osst_allocate_request(); - if (SRpnt == NULL) { - printk(KERN_ERR "%s: Can't allocate SCSI request.\n", - tape_name(STp)); - if (signal_pending(current)) - (STp->buffer)->syscall_result = (-EINTR); - else - (STp->buffer)->syscall_result = (-EBUSY); - return NULL; - } - SRpnt->stp = STp; - } - - /* If async IO, set last_SRpnt. This ptr tells write_behind_check - which IO is outstanding. It's nulled out when the IO completes. */ - if (!do_wait) - (STp->buffer)->last_SRpnt = SRpnt; - - waiting = &STp->wait; - init_completion(waiting); - SRpnt->waiting = waiting; - - use_sg = (bytes > STp->buffer->sg[0].length) ? STp->buffer->use_sg : 0; - if (use_sg) { - bp = (char *)&(STp->buffer->sg[0]); - if (STp->buffer->sg_segs < use_sg) - use_sg = STp->buffer->sg_segs; - } - else - bp = (STp->buffer)->b_data; - - memcpy(SRpnt->cmd, cmd, sizeof(SRpnt->cmd)); - STp->buffer->cmdstat.have_sense = 0; - STp->buffer->syscall_result = 0; - - if (osst_execute(SRpnt, cmd, COMMAND_SIZE(cmd[0]), direction, bp, bytes, - use_sg, timeout, retries)) - /* could not allocate the buffer or request was too large */ - (STp->buffer)->syscall_result = (-EBUSY); - else if (do_wait) { - wait_for_completion(waiting); - SRpnt->waiting = NULL; - STp->buffer->syscall_result = osst_chk_result(STp, SRpnt); -#ifdef OSST_INJECT_ERRORS - if (STp->buffer->syscall_result == 0 && - cmd[0] == READ_6 && - cmd[4] && - ( (++ inject % 83) == 29 || - (STp->first_frame_position == 240 - /* or STp->read_error_frame to fail again on the block calculated above */ && - ++repeat < 3))) { - printk(OSST_DEB_MSG "%s:D: Injecting read error\n", tape_name(STp)); - STp->buffer->last_result_fatal = 1; - } -#endif - } - return SRpnt; -} - - -/* Handle the write-behind checking (downs the semaphore) */ -static void osst_write_behind_check(struct osst_tape *STp) -{ - struct osst_buffer * STbuffer; - - STbuffer = STp->buffer; - -#if DEBUG - if (STp->write_pending) - STp->nbr_waits++; - else - STp->nbr_finished++; -#endif - wait_for_completion(&(STp->wait)); - STp->buffer->last_SRpnt->waiting = NULL; - - STp->buffer->syscall_result = osst_chk_result(STp, STp->buffer->last_SRpnt); - - if (STp->buffer->syscall_result) - STp->buffer->syscall_result = - osst_write_error_recovery(STp, &(STp->buffer->last_SRpnt), 1); - else - STp->first_frame_position++; - - osst_release_request(STp->buffer->last_SRpnt); - - if (STbuffer->writing < STbuffer->buffer_bytes) - printk(KERN_WARNING "osst :A: write_behind_check: something left in buffer!\n"); - - STbuffer->last_SRpnt = NULL; - STbuffer->buffer_bytes -= STbuffer->writing; - STbuffer->writing = 0; - - return; -} - - - -/* Onstream specific Routines */ -/* - * Initialize the OnStream AUX - */ -static void osst_init_aux(struct osst_tape * STp, int frame_type, int frame_seq_number, - int logical_blk_num, int blk_sz, int blk_cnt) -{ - os_aux_t *aux = STp->buffer->aux; - os_partition_t *par = &aux->partition; - os_dat_t *dat = &aux->dat; - - if (STp->raw) return; - - memset(aux, 0, sizeof(*aux)); - aux->format_id = htonl(0); - memcpy(aux->application_sig, "LIN4", 4); - aux->hdwr = htonl(0); - aux->frame_type = frame_type; - - switch (frame_type) { - case OS_FRAME_TYPE_HEADER: - aux->update_frame_cntr = htonl(STp->update_frame_cntr); - par->partition_num = OS_CONFIG_PARTITION; - par->par_desc_ver = OS_PARTITION_VERSION; - par->wrt_pass_cntr = htons(0xffff); - /* 0-4 = reserved, 5-9 = header, 2990-2994 = header, 2995-2999 = reserved */ - par->first_frame_ppos = htonl(0); - par->last_frame_ppos = htonl(0xbb7); - aux->frame_seq_num = htonl(0); - aux->logical_blk_num_high = htonl(0); - aux->logical_blk_num = htonl(0); - aux->next_mark_ppos = htonl(STp->first_mark_ppos); - break; - case OS_FRAME_TYPE_DATA: - case OS_FRAME_TYPE_MARKER: - dat->dat_sz = 8; - dat->reserved1 = 0; - dat->entry_cnt = 1; - dat->reserved3 = 0; - dat->dat_list[0].blk_sz = htonl(blk_sz); - dat->dat_list[0].blk_cnt = htons(blk_cnt); - dat->dat_list[0].flags = frame_type==OS_FRAME_TYPE_MARKER? - OS_DAT_FLAGS_MARK:OS_DAT_FLAGS_DATA; - dat->dat_list[0].reserved = 0; - /* fall through */ - case OS_FRAME_TYPE_EOD: - aux->update_frame_cntr = htonl(0); - par->partition_num = OS_DATA_PARTITION; - par->par_desc_ver = OS_PARTITION_VERSION; - par->wrt_pass_cntr = htons(STp->wrt_pass_cntr); - par->first_frame_ppos = htonl(STp->first_data_ppos); - par->last_frame_ppos = htonl(STp->capacity); - aux->frame_seq_num = htonl(frame_seq_number); - aux->logical_blk_num_high = htonl(0); - aux->logical_blk_num = htonl(logical_blk_num); - break; - default: ; /* probably FILL */ - } - aux->filemark_cnt = htonl(STp->filemark_cnt); - aux->phys_fm = htonl(0xffffffff); - aux->last_mark_ppos = htonl(STp->last_mark_ppos); - aux->last_mark_lbn = htonl(STp->last_mark_lbn); -} - -/* - * Verify that we have the correct tape frame - */ -static int osst_verify_frame(struct osst_tape * STp, int frame_seq_number, int quiet) -{ - char * name = tape_name(STp); - os_aux_t * aux = STp->buffer->aux; - os_partition_t * par = &(aux->partition); - struct st_partstat * STps = &(STp->ps[STp->partition]); - unsigned int blk_cnt, blk_sz, i; - - if (STp->raw) { - if (STp->buffer->syscall_result) { - for (i=0; i < STp->buffer->sg_segs; i++) - memset(page_address(sg_page(&STp->buffer->sg[i])), - 0, STp->buffer->sg[i].length); - strcpy(STp->buffer->b_data, "READ ERROR ON FRAME"); - } else - STp->buffer->buffer_bytes = OS_FRAME_SIZE; - return 1; - } - if (STp->buffer->syscall_result) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, read error\n", name); -#endif - return 0; - } - if (ntohl(aux->format_id) != 0) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, format_id %u\n", name, ntohl(aux->format_id)); -#endif - goto err_out; - } - if (memcmp(aux->application_sig, STp->application_sig, 4) != 0 && - (memcmp(aux->application_sig, "LIN3", 4) != 0 || STp->linux_media_version != 4)) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, incorrect application signature\n", name); -#endif - goto err_out; - } - if (par->partition_num != OS_DATA_PARTITION) { - if (!STp->linux_media || STp->linux_media_version != 2) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, partition num %d\n", - name, par->partition_num); -#endif - goto err_out; - } - } - if (par->par_desc_ver != OS_PARTITION_VERSION) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, partition version %d\n", name, par->par_desc_ver); -#endif - goto err_out; - } - if (ntohs(par->wrt_pass_cntr) != STp->wrt_pass_cntr) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, wrt_pass_cntr %d (expected %d)\n", - name, ntohs(par->wrt_pass_cntr), STp->wrt_pass_cntr); -#endif - goto err_out; - } - if (aux->frame_type != OS_FRAME_TYPE_DATA && - aux->frame_type != OS_FRAME_TYPE_EOD && - aux->frame_type != OS_FRAME_TYPE_MARKER) { - if (!quiet) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, frame type %x\n", name, aux->frame_type); -#endif - } - goto err_out; - } - if (aux->frame_type == OS_FRAME_TYPE_EOD && - STp->first_frame_position < STp->eod_frame_ppos) { - printk(KERN_INFO "%s:I: Skipping premature EOD frame %d\n", name, - STp->first_frame_position); - goto err_out; - } - if (frame_seq_number != -1 && ntohl(aux->frame_seq_num) != frame_seq_number) { - if (!quiet) { -#if DEBUG - printk(OSST_DEB_MSG "%s:D: Skipping frame, sequence number %u (expected %d)\n", - name, ntohl(aux->frame_seq_num), frame_seq_number); -#e |