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2020-03-11scsi: Replace zero-length array with flexible-array memberGustavo A. R. Silva1-1/+1
The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Link: https://lore.kernel.org/r/20200224161406.GA21454@embeddedor Reviewed-by: Lee Duncan <lduncan@suse.com> Reviewed-by: Satish Kharat <satishkh@cisco.com> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner1-6/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-18scsi: remove the use_clustering flagChristoph Hellwig1-1/+1
The same effects can be achieved by setting the dma_boundary to PAGE_SIZE - 1 and the max_segment_size to PAGE_SIZE, so shift those settings into the drivers. Note that in many cases the setting might be bogus, but this keeps the status quo. [mkp: fix myrs and myrb] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-12-18scsi: make sure all drivers set the use_clustering flagChristoph Hellwig1-0/+1
A few drivers were not setting the use_clustering flag at all and thus default to disable. Fix them up to explicitly set this field in preparation for additional cleanups. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-11-15scsi: stex: use dma_set_mask_and_coherentChristoph Hellwig1-14/+3
The driver currently uses pci_set_dma_mask despite otherwise using the generic DMA API. Switch it over to the better generic DMA API. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-04-26scsi: stex: make S6flag staticColin Ian King1-1/+1
This module specific flag can be made static as it does not need to be in global scope. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Charles Chiou <charles.chiou@tw.promise.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-15scsi: stex: Add S6 supportCharles1-2/+23
1. Add reboot notifier and register it in stex_probe for all supported device. 2. For all supported device in restart flow, we get a callback from notifier and set S6flag for stex_shutdown & stex_hba_stop to send restart command to FW. Signed-off-by: Charles.Chiou <charles.chiou@tw.promise.com> Signed-off-by: Paul.Lyu <paul.lyu@tw.promise.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-03-15scsi: stex: Support Pegasus 3 productCharles1-67/+195
Pegasus series is a RAID support product using Thunderbolt technology. The newest product, Pegasus 3(P3) supports Thunderbolt 3 technology with a different chip. 1. Change driver version. 2. Add P3 VID, DID and define it's device address. 3. P3 use msi interrupt, so stex_request_irq P3 type enable msi. 4. For hibernation, use msi_lock in stex_ss_handshake to prevent msi register write again when handshaking. 5. P3 doesn't need read() as flush. 6. In stex_ss_intr & stex_abort, P3 only clear interrupt register when getting vendor defined interrupt. Signed-off-by: Charles.Chiou <charles.chiou@tw.promise.com> Signed-off-by: Paul.Lyu <paul.lyu@tw.promise.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23stex: Add S3/S4 supportCharles1-3/+65
Add S3/S4 support, add .suspend and .resume function in pci_driver. In .suspend handler, driver send S3/S4 signal to the device. Signed-off-by: Charles Chiou <charles.chiou@tw.promise.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23stex: Add hotplug supportCharles1-19/+34
1. Add hotplug support. Pegasus support surprise removal. To this end, I use return_abnormal_state function to return DID_NO_CONNECT for all commands which sent to driver. 2. Remove stex_hba_stop in stex_remove because we cannot send command to device after hotplug. 3. Add new device status: MU_STATE_STOP, MU_STATE_NOCONNECT, MU_STATE_STOP. MU_STATE_STOP is currently not referenced. MU_STATE_NOCONNECT represent that device is plugged out from the host. 4. Use return_abnormal_function() to substitute part of code in stex_do_reset. Signed-off-by: Charles Chiou <charles.chiou@tw.promise.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-02-23stex: Support to Pegasus series.Charles1-6/+26
Pegasus is a high performace hardware RAID solution designed to unleash the raw power of Thunderbolt technology. 1. Add code to distinct SuperTrack and Pegasus series by sub device ID. It should support backward compatibility. 2. Change the driver version. Signed-off-by: Charles Chiou <charles.chiou@tw.promise.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2015-11-09stex: Remove use of struct timevalTina Ruchandani1-10/+3
Function stex_gettime uses 'struct timeval' whose tv_sec value will overflow on 32-bit systems in year 2038 and beyond. This patch replaces the use of struct timeval and do_gettimeofday with ktime_get_real_seconds, which returns a 64-bit seconds value. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-11-09scsi: use host wide tags by defaultChristoph Hellwig1-8/+0
This patch changes the !blk-mq path to the same defaults as the blk-mq I/O path by always enabling block tagging, and always using host wide tags. We've had blk-mq available for a few releases so bugs with this mode should have been ironed out, and this ensures we get better coverage of over tagging setup over different configs. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jens Axboe <axboe@kernel.dk> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2014-11-12scsi: don't force tagged_supported in driversChristoph Hellwig1-11/+0
Now that we also get proper values in cmd->request->tag for untagged commands, there is no need to force tagged_supported to on in drivers that need host-wide tags. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Reviewed-by: Hannes Reinecke <hare@suse.de>
2014-11-12scsi: don't set tagging state from scsi_adjust_queue_depthChristoph Hellwig1-2/+0
Remove the tagged argument from scsi_adjust_queue_depth, and just let it handle the queue depth. For most drivers those two are fairly separate, given that most modern drivers don't care about the SCSI "tagged" status of a command at all, and many old drivers allow queuing of multiple untagged commands in the driver. Instead we start out with the ->simple_tags flag set before calling ->slave_configure, which is how all drivers actually looking at ->simple_tags except for one worke anyway. The one other case looks broken, but I've kept the behavior as-is for now. Except for that we only change ->simple_tags from the ->change_queue_type, and when rejecting a tag message in a single driver, so keeping this churn out of scsi_adjust_queue_depth is a clear win. Now that the usage of scsi_adjust_queue_depth is more obvious we can also remove all the trivial instances in ->slave_alloc or ->slave_configure that just set it to the cmd_per_lun default. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2014-11-12scsi: always assign block layer tags if enabledChristoph Hellwig1-8/+2
Allow a driver to ask for block layer tags by setting .use_blk_tags in the host template, in which case it will always see a valid value in request->tag, similar to the behavior when using blk-mq. This means even SCSI "untagged" commands will now have a tag, which is especially useful when using a host-wide tag map. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
2014-11-12scsi: Remove scsi_print_command when calling abortHannes Reinecke1-6/+3
Calling scsi_print_command should not be necessary during abort; if the information is required one should enable scsi logging. Signed-off-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Robert Elliott <elliott@hp.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2013-10-14SCSI: remove unnecessary pci_set_drvdata()Jingoo Han1-2/+0
Since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d (device-core: Ensure drvdata = NULL when no driver is bound), the driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Cc: James Bottomley <JBottomley@parallels.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-01-03Drivers: scsi: remove __dev* attributes.Greg Kroah-Hartman1-3/+2
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: Adam Radford <linuxraid@lsi.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2010-11-16SCSI host lock push-downJeff Garzik1-1/+3
Move the mid-layer's ->queuecommand() invocation from being locked with the host lock to being unlocked to facilitate speeding up the critical path for drivers who don't need this lock taken anyway. The patch below presents a simple SCSI host lock push-down as an equivalent transformation. No locking or other behavior should change with this patch. All existing bugs and locking orders are preserved. Additionally, add one parameter to queuecommand, struct Scsi_Host * and remove one parameter from queuecommand, void (*done)(struct scsi_cmnd *) Scsi_Host* is a convenient pointer that most host drivers need anyway, and 'done' is redundant to struct scsi_cmnd->scsi_done. Minimal code disturbance was attempted with this change. Most drivers needed only two one-line modifications for their host lock push-down. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Acked-by: James Bottomley <James.Bottomley@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo1-0/+1
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-01-04[SCSI] stex: fix scan of nonexistent lunEd Lin1-0/+5
During a manual scan, a user can send command to a nonexistent lun, precisely at the point of max_lun. Normally it's possible (but not required) that the firmware has the knowledge that it is an invalid lun. In the particular case when max_lun is 256, however, the nonexistent lun 256 will be confused with lun 0, because the lun member in a request message is only u8, and 256 will become 0. So we need to fix the problem, at least, at the driver level. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-10-29[SCSI] stex: update version to 4.6.0000.4Ed Lin1-4/+4
Update version to 4.6.0000.4. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-10-29[SCSI] stex: add support for reset request from firmwareEd Lin1-83/+166
Add support for reset request from firmware for controllers of st_shasta and st_yel type. Code adjustments necessary for this change are also included. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-10-29[SCSI] stex: add small dma buffer supportEd Lin1-5/+20
The controllers of st_seq and st_vsc type can work if only small dma buffer is available, with a reduced firmware feature set. Add support for this case. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-09-05[SCSI] stex: Add reset code for st_yel (v2)Ed Lin1-4/+29
Add reset related code for st_yel. 1. Set the SS_H2I_INT_RESET bit. 2. Wait for the SS_MU_OPERATIONAL flag. This is also part of normal handshake process so move it to handshake routine. 3. Continue handshake with the firmware. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-04-07dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)Yang Hongyang1-2/+2
Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32) Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64)Yang Hongyang1-2/+2
Replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64) Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-03[SCSI] stex: update version to 4.6.0000.3Ed Lin1-5/+5
Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-04-03[SCSI] stex: add new 6G controller supportEd Lin1-31/+351
This adds the support of a new SAS 6G controller (st_yel) Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-04-03[SCSI] stex: use config struct for parameters of different controllersEd Lin1-76/+125
Use config struct (st_card_info) for parameters of different controllers Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-04-03[SCSI] stex: add MSI supportEd Lin1-5/+43
This adds the MSI support (default 0=off) Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-04-03[SCSI] stex: small code fixes and changesEd Lin1-65/+60
These are some small code fixes and changes, including: - use 64 bit when possible - remove some unnecessary code (in interrupt, queuecommand routine etc.) - code change for reset handler Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] stex: Version updateEd Lin - PTU1-3/+3
Update version to 4.6.0000.1 Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] stex: Small fixesEd Lin - PTU1-6/+22
Some small fixes, including: - add data direction in req_msg because new firmware version may require this (backward compatible) - change internal timeout value - change judgment of type st_vsc1 - blank line handling, etc. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] stex: Fix for controller type st_yosemiteEd Lin - PTU1-61/+3
This is the fix for controller type st_yosemite, including - max_lun is 256 (backward compatible) - remove unneeded special handling of INQUIRY - remove unnecessary listing of sub device ids Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] stex: Add new device idEd Lin - PTU1-2/+6
Add new device id for controller type st_seq. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-03-12[SCSI] stex: Fix for potential invalid responseEd Lin - PTU1-0/+1
The interrupt routine is good for normal cases. However, if the firmware is abnormal and returns an invalid response, the driver may reuse a ccb structure that has already been handled. This may cause problem. Fix this by setting the req member to NULL. Next time we know the response is invalid and handle accordingly if req is NULL. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-12-29[SCSI] advansys, arcmsr, ipr, nsp32, qla1280, stex: use pci_ioremap_bar()Arjan van de Ven1-2/+1
Use the newly introduced pci_ioremap_bar() function in drivers/scsi. pci_ioremap_bar() just takes a pci device and a bar number, with the goal of making it really hard to get wrong, while also having a central place to stick sanity checks. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Matthew Wilcox <willy@linux.intel.com> Cc: Brian King <brking@us.ibm.com> Cc: Ed Lin <ed.lin@promise.com> Cc: Nick Cheng <nick.cheng@areca.com.tw> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-12-01[SCSI] stex: switch to block timeoutJames Bottomley1-1/+1
stex sets the timeout in its slave configure routine for all devices. This now needs to update the request queue timeout in block. Cc: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-07-26[SCSI] stex: fix queue depth settingMike Christie1-1/+1
We want to set the queue depth to something reasonable - not the can_queue. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-04-07[SCSI] stex: use scsi_build_sense_bufferFUJITA Tomonori1-12/+5
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-04-07[SCSI] stex: use sg buffer copy helper functionsFUJITA Tomonori1-56/+10
This replaces stex_internal_copy with scsi_sg_copy_to/from_buffer. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-02-22[SCSI] stex: stex_internal_copy should be called with sg_count in struct st_ccbFUJITA Tomonori1-4/+6
stex_internal_copy copies an in-kernel buffer to a sg list by using scsi_kmap_atomic_sg. Some functions calls stex_internal_copy with sg_count in struct st_ccb, which is the value that dma_map_sg returned. However it might be shorter than the actual number of sg entries (if the IOMMU merged the sg entries). scsi_kmap_atomic_sg doesn't see sg->dma_length so stex_internal_copy should be called with the actual number of sg entries (i.e. scsi_sg_count), because if the sg entries were merged, stex_direct_copy wrongly think that the data length in the sg list is shorter than the actual length. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-02-22[SCSI] stex: stex_direct_copy shouldn't call dma_map_sgFUJITA Tomonori1-22/+12
stex_direct_copy copies an in-kernel buffer to a sg list in order to spoof some SCSI commands. stex_direct_copy calls dma_map_sg and then stex_internal_copy with the value that dma_map_sg returned. It calls scsi_kmap_atomic_sg to copy data. scsi_kmap_atomic_sg doesn't see sg->dma_length so if dma_map_sg merges sg entries, stex_internal_copy gets the smaller number of sg entries than the acutual number, which means it wrongly think that the data length in the sg list is shorter than the actual length. stex_direct_copy shouldn't call dma_map_sg and it doesn't need since this code path doesn't involve dma transfers. This patch removes stex_direct_copy and simply calls stex_internal_copy with the actual number of sg entries. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2008-01-30[SCSI] remove use_sg_chainingJames Bottomley1-1/+0
With the sg table code, every SCSI driver is now either chain capable or broken (or has sg_tablesize set so chaining is never activated), so there's no need to have a check in the host template. Also tidy up the code by moving the scatterlist size defines into the SCSI includes and permit the last entry of the scatterlist pools not to be a power of two. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2007-10-16[SCSI] add use_sg_chaining option to scsi_host_templateFUJITA Tomonori1-0/+1
This option is true if a low-level driver can support sg chaining. This will be removed eventually when all the drivers are converted to support sg chaining. q->max_phys_segments is set to SCSI_MAX_SG_SEGMENTS if false. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-14[SCSI] stex: use resid for xfer len informationEd Lin1-2/+2
The original implementation in stex_ys_commands() is inappropriate. For xfer len information, we should use resid instead. Signed-off-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-05-30[SCSI] Merge up to linux-2.6 headJames Bottomley1-36/+54
Conflicts: drivers/scsi/jazz_esp.c Same changes made by both SCSI and SPARC trees: problem with UTF-8 conversion in the copyright. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2007-05-29[SCSI] stex: convert to use the data buffer accessorsFUJITA Tomonori1-73/+36
- remove the unnecessary map_single path. - convert to use the new accessors for the sg lists and the parameters. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Ed Lin <ed.lin@promise.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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