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* [SCSI] st: remove unused frp_sg_currentFUJITA Tomonori2009-01-021-1/+0
| | | | | | | | frp_sg_current in struct st_buffer is always zero. We don't need it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: remove unused orig_frp_segsFUJITA Tomonori2009-01-021-1/+0
| | | | | | | | orig_frp_segs in struct st_buffer is always zero. We don't need it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: remove struct scatterlistFUJITA Tomonori2009-01-021-1/+0
| | | | | | | | This removes the usage of struct scatterlist completely. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: kill struct st_buff_fragmentFUJITA Tomonori2009-01-021-7/+0
| | | | | | | | | This removes struct st_buff_fragment and use reserved_pages array to store fragment buffer. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: convert dio path to use st_scsi_executeFUJITA Tomonori2009-01-021-0/+1
| | | | | | | | | | | This patch converts the dio path (mmap) to use st_scsi_execute. IOW, it removes scsi_execute_async in the non dio path. scsi_execute_async has gone! This also remove unused st_sleep_done. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: add st_scsi_execute helper functionFUJITA Tomonori2009-01-021-0/+1
| | | | | | | | | | | | | st_scsi_execute is a helper function to perform SCSI commands involving data transfer between user and kernel space (st_read and st_write). It's the future plan to combine this with st_scsi_kern_execute helper function. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: add struct rq_map_data supportFUJITA Tomonori2009-01-021-0/+2
| | | | | | | | | | | This adds struct rq_map_data and the array of pointers to store fragment buffers to struct st_buffer. This patch doesn't remove st_buf_fragment but the latter patch does. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Kai Makisara <Kai.Makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: add option to use SILI in variable block readsKai Makisara2008-04-071-0/+3
| | | | | | | | | | | Add new option MT_ST_SILI to enable setting the SILI bit in reads in variable block mode. If SILI is set, reading a block shorter than the byte count does not result in CHECK CONDITION. The length of the block is determined using the residual count from the HBA. Avoiding the REQUEST SENSE command for every block speeds up some real applications considerably. Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: compile fix when DEBUG set to oneKai Makisara2008-02-221-1/+0
| | | | | | | | Remove the now useless counting of adjacent pages from the debugging code in to make it compile when DEBUG is set non-zero. Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [SCSI] st: Use mutex instead of semaphoreMatthias Kaehlcke2007-07-311-1/+2
| | | | | | | | | The SCSI Tape driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Acked-by: Kai Makisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] st: fix Tape dies if wrong block size used, bug 7919Kai Makisara2007-02-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Thu, 1 Feb 2007, Andrew Morton wrote: > On Thu, 1 Feb 2007 15:34:29 -0800 > bugme-daemon@bugzilla.kernel.org wrote: > > > http://bugzilla.kernel.org/show_bug.cgi?id=7919 > > > > Summary: Tape dies if wrong block size used > > Kernel Version: 2.6.20-rc5 > > Status: NEW > > Severity: normal > > Owner: scsi_drivers-other@kernel-bugs.osdl.org > > Submitter: dmartin@sccd.ctc.edu > > > > > > Most recent kernel where this bug did *NOT* occur: 2.6.17.14 > > > > Other Kernels Tested and Results: > > > > OK 2.6.15.7 > > OK 2.6.16.37 > > OK 2.6.17.14 > > BAD 2.6.18.6 > > BAD 2.6.18-1.2869.fc6 > > BAD 2.6.19.2 + > > BAD 2.6.20-rc5 > > > > NOTE: 2.6.18-1.2869.fc6 is a Fedora modified kernel, all others are from kernel.org > > ... > > Steps to reproduce: > > Get a Adaptec AHA-2940U/UW/D / AIC-7881U card and a tape drive, > > install a recent kernel > > set the tape block size - mt setblk 4096 > > read from or write to tape using wrong block size - tar -b 7 -cvf /dev/tape foo > > Write does not trigger this bug because the driver refuses in fixed block mode writes that are not a multiple of the block size. Read does trigger it in my system. The bug is not associated with any specific HBA. st tries to do direct i/o in fixed block mode with reads that are not a multiple of tape block size. The patch in this message fixes the st problem by switching to using the driver buffer up to the next close of the device file in fixed block mode if the user asks for a read like this. I don't know why the bug has surfaced only after 2.6.17 although the st problem is old. There may be another bug in the block subsystem and this patch works around it. However, the patch fixes a problem in st and in this way it is a valid fix. This patch may also fix the bug 7900. The patch compiles and is lightly tested. Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] st: remove unused st_buffer.in_useMartin Habets2006-06-291-1/+0
| | | | | | | | | | I noticed that in_use in st_buffer is not used. The patch below against 2.6.17-rc3 removes it, assuming there is no future use for it. It was tested in a sparc SS20 with a DLT4000. Signed-off-by: Martin Habets <errandir_news@mph.eclipse.co.uk> Acked-by: Kai Mäkisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] convert st to use scsi_execute_asyncMike Christie2005-12-141-1/+13
| | | | | | | | | | | | | | | | | | | | convert st to always send scatterlists and kill scsi_request usage. This is the same as last time as it was posted, but with Kai's patches merged and we now pass the bytes value to scsi_execute_async. TODO: - move DIO code to common place or make block layers usable for ULDs. - move buffer allocation code to common place for all ULDs to use. And make buffer allocation code handle all queue limits so we can find out about problems before calling scsi_execute_async. - move indirect (copy_to/from_user) paths commone place or make block layers usable for ULDs. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] drivers/scsi/st.c: add reference count and related fixesKai Makisara2005-08-081-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I have rediffed the patch against 2.6.13-rc5, done a couple of cosmetic cleanups, and run some tests. Brian King has acknowledged that it fixes the problems he has seen. Seems mature enough for inclusion into 2.6.14 (or later)? Nate's explanation of the changes: I've attached patches against 2.6.13rc2. These are basically identical to my earlier patches, as I found that all issues I'd seen in earlier kernels still existed in this kernel. To summarize, the changes are: (more details in my original email) - add a kref to the scsi_tape structure, and associate reference counting stuff - set sr_request->end_io = blk_end_sync_rq so we get notified when an IO is rejected when the device goes away - check rq_status when IOs complete, else we don't know that IOs rejected for a dead device in fact did not complete - change last_SRpnt so it's set before an async IO is issued (in case st_sleep_done is bypassed) - fix a bogus use of last_SRpnt in st_chk_result Signed-off-by: Nate Dailey <nate.dailey@stratus.com> Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+212
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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