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* s390/cio: export CMG value as decimalPeter Oberparleiter2023-10-251-1/+1
| | | | | | | | | | | | | Change format of the "cmg" sysfs attribute from hex to decimal to make it easier to consume. Note that this should not break any existing users since only values 2 and 3 are currently exported. Also the main user already assumes decimal notation [1]. [1] https://sourceforge.net/p/sblim/gather/ci/master/tree/plugin/metriczCH.c Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com> Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
* s390: replace snprintf in show functions with sysfs_emitQing Wang2021-11-161-1/+1
| | | | | | | | | | | | | | | | | show() must not use snprintf() when formatting the value to be returned to user space. Fix the coccicheck warnings: WARNING: use scnprintf or sprintf. Use sysfs_emit instead of scnprintf or sprintf makes more sense. Signed-off-by: Qing Wang <wangqing@vivo.com> Acked-by: Vineeth Vijayan <vneethv@linux.ibm.com> Acked-by: Stefan Haberland <sth@linux.ibm.com> Link: https://lore.kernel.org/r/1634280655-4908-1-git-send-email-wangqing@vivo.com [hca@linux.ibm.com: fix indentation] Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
* s390/cio: dont call css_wait_for_slow_path() inside a lockVineeth Vijayan2021-06-181-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently css_wait_for_slow_path() gets called inside the chp->lock. The path-verification-loop of slowpath inside this lock could lead to deadlock as reported by the lockdep validator. The ccw_device_get_chp_desc() during the instance of a device-set-online would try to acquire the same 'chp->lock' to read the chp->desc. The instance of this function can get called from multiple scenario, like probing or setting-device online manually. This could, in some corner-cases lead to the deadlock. lockdep validator reported this as, CPU0 CPU1 ---- ---- lock(&chp->lock); lock(kn->active#43); lock(&chp->lock); lock((wq_completion)cio); The chp->lock was introduced to serialize the access of struct channel_path. This lock is not needed for the css_wait_for_slow_path() function, so invoke the slow-path function outside this lock. Fixes: b730f3a93395 ("[S390] cio: add lock to struct channel_path") Cc: <stable@vger.kernel.org> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
* s390/cio: use DECLARE_WAIT_QUEUE_HEAD for static work_queue_head_tVineeth Vijayan2021-04-121-2/+1
| | | | | | | | | Use DECLARE_WAIT_QUEUE_HEAD to declare and statically initialize the work_queue_head_t. Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
* s390/cio: Export information about Endpoint-Security CapabilitySebastian Ott2020-11-161-0/+15
| | | | | | | | | | | | | | | | | | | | | Add a new sysfs attribute 'esc' per chpid. This new attribute exports the Endpoint-Security-Capability byte of channel-path description block, which could be 0-None, 1-Authentication, 2 and 3-Encryption. For example: $ cat /sys/devices/css0/chp0.34/esc 0 [vneethv@linux.ibm.com: cleaned-up & modified description] Signed-off-by: Sebastian Ott <sebott@linux.ibm.com> Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com> Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
* s390/cio: use kobj_to_dev() APIchenqiwu2020-02-171-2/+2
| | | | | | | | | | Use kobj_to_dev() API instead of container_of(). Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: chenqiwu <chenqiwu@xiaomi.com> Signed-off-by: chenqiwu <qiwuchen55@gmail.com> Message-Id: <1581688293-17283-1-git-send-email-qiwuchen55@gmail.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
* s390/cio: ensure that a chpid is registered only onceSebastian Ott2018-07-171-10/+11
| | | | | | | | | | | | Improve locking in chp_new to make sure that we don't register the same chpid twice. Chpid registration was synchronized via the machine check handler thread but we also have codepaths to look for new chpids triggered independent of that thread (during IPL or resume from hibernate). Signed-off-by: Sebastian Ott <sebott@linux.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: add util_string sysfs attributeSebastian Ott2018-03-281-0/+23
| | | | | | | Export utility strings as a chpid's binary sysfs attribute. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/chsc: query utility strings via fmt3 channel path descriptorSebastian Ott2018-03-261-0/+1
| | | | | | | | | Add support for format 3 channel path descriptors and use them to gather utility strings. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: rename struct channel_path_descSebastian Ott2018-03-261-5/+5
| | | | | | | | | | Rename struct channel_path_desc to struct channel_path_desc_fmt0 to fit the scheme. Provide a macro for the function wrappers that gather this and related data from firmware. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: fix kernel-doc usageSebastian Ott2018-02-051-5/+5
| | | | | | | | Fix the kernel-doc usage in cio to get rid of (W=1) build warnings like: drivers/s390/cio/cio.c:1068: warning: No description found for parameter 'sch' Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: cio: add SPDX identifiers to the remaining filesGreg Kroah-Hartman2017-11-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/s390/cio/ files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: add const to bin_attribute structuresBhumika Goyal2017-08-031-2/+2
| | | | | | | | | | | Add const to bin_attribute structures as they are only passed to the functions device_{remove/create}_bin_file. The corresponding arguments are of type const, so declare the structures to be const. Cross compiled for s390 architecture. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: chp: handle CRW_ERC_INIT for channel-path status changeDong Jia Shi2017-07-131-0/+1
| | | | | | | | | | | | | When channel path is identified as the report source code (RSC) of a CRW, and initialized (CRW_ERC_INIT) is recognized as the error recovery code (ERC) by the channel subsystem, it indicates a "path has come" event. Let's handle this case in chp_process_crw(). Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: clarify cssid usageSebastian Ott2017-01-161-6/+7
| | | | | | | | | | | | | | | | | Currently the cssid in various structures is used as the id of the respective channel subsystem. Sometimes however we call the index in the channel_subsystems array cssid. In some places the id is even used as the index. Provide a new define MAX_CSS_IDX and use it where appropriate. In addition to that provide a dummy function to find a channel subsystem by its id and a macro to iterate over the channel subsystems. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: don't register chpids in reserved stateSebastian Ott2016-10-171-2/+4
| | | | | | | | | | | | | | | During IPL we register all chpids that are not in the unrecognized state. This includes chpids that are not usable and chpids for which the state could not be obtained. Change that to only register chpids in the configured (usable) or standby (usable after a configure operation) state. All other chpids could only be made available by external control for which we would receive machine checks. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: fix premature wakeup during chp configureSebastian Ott2016-07-311-14/+32
| | | | | | | | | | | | | | | | We store requests for channel path configure operations in an array but maintain an additional cfg_busy variable (indicating if we have requests stored in said array). When 2 tasks request a channel path configure operation cfg_busy could be set to 0 even if we still have unprocessed requests. This would lead to the second task being woken up although its request was not processed yet. Fix that by getting rid of cfg_busy and use the chp_cfg_task array in the wake up condition. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: convert cfg_lock mutex to spinlockSebastian Ott2016-07-311-9/+9
| | | | | | | | | | | cfg_lock is never held long and we don't want to sleep while the lock is being held. Thus it can be converted to a simple spinlock. In addition we can now use the lock during the evaluation of a wake_up condition. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio/chp : Remove deprecated create_singlethread_workqueueBhaktipriya Shridhar2016-07-181-9/+2
| | | | | | | | | | | | | | | | | | | | | | | The workqueue "chp_wq" is involved in performing pending configure tasks for channel paths. It has a single work item(&cfg_work) and hence doesn't require ordering. Also, it is not being used on a memory reclaim path. Hence, the singlethreaded workqueue has been replaced with the use of system_wq. System workqueues have been able to handle high level of concurrency for a long time now and hence it's not required to have a singlethreaded workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue created with create_singlethread_workqueue(), system_wq allows multiple work items to overlap executions even on the same CPU; however, a per-cpu workqueue doesn't have any CPU locality or global ordering guarantee unless the target CPU is explicitly specified and thus the increase of local concurrency shouldn't make any difference. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: make fmt1 channel path descriptor optionalSebastian Ott2016-07-151-4/+7
| | | | | | | | | | | | | | | | | | Not all machines / hypervisors support the chsc commands to fetch the fmt1 descriptor. When these commands fail the channel path would currently not be available to linux. Since users of these descriptors can already deal with invalid data make fetching it optional. The only data that is mandatory for us is the fmt0 channel path descriptor. Also make the return code for missing facilities in chsc_get_channel_measurement_chars consistent to other functions. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: update measurement characteristicsSebastian Ott2016-01-261-7/+5
| | | | | | | | | | | | | Per channel path measurement characteristics are obtained during channel path registration. However if some properties of a channel path change we don't update the measurement characteristics. Make sure to update the characteristics when we change the properties of a channel path or receive a notification from FW about such a change. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: ensure consistent measurement stateSebastian Ott2016-01-261-8/+5
| | | | | | | | | | | | | | Make sure that in all cases where we could not obtain measurement characteristics the associated fields are set to invalid values. Note: without this change the "shared" capability of a channel path for which we could not obtain the measurement characteristics was incorrectly displayed as 0 (not shared). We will now correctly report "unknown" in this case. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: fix measurement characteristics memleakSebastian Ott2016-01-261-3/+3
| | | | | | | | | | Measurement characteristics are allocated during channel path registration but not freed during deregistration. Fix this by embedding these characteristics inside struct channel_path. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: replace strnicmp with strncasecmpRasmus Villemoes2014-10-141-2/+2
| | | | | | | | | | | | | | | | | | The kernel used to contain two functions for length-delimited, case-insensitive string comparison, strnicmp with correct semantics and a slightly buggy strncasecmp. The latter is the POSIX name, so strnicmp was renamed to strncasecmp, and strnicmp made into a wrapper for the new strncasecmp to avoid breaking existing users. To allow the compat wrapper strnicmp to be removed at some point in the future, and to avoid the extra indirection cost, do s/strnicmp/strncasecmp/g. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* s390/cio: fix multiple structure definitionsSebastian Ott2014-05-201-1/+1
| | | | | | | | | | Fix multiple definitions of struct channel_path_desc by moving it to asm/chpid.h . Also change ccw_device_get_chp_desc to use proper types. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: add channel ID sysfs attributePeter Oberparleiter2013-05-151-0/+36
| | | | | | | | | | Add new attributes "chid" and "chid_external" to the channel-path sysfs directory. These attributes contain information related to the channel-ID of the channel-path. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: collect format 1 channel-path description dataPeter Oberparleiter2013-04-171-1/+21
| | | | | | | | | Collect format 1 channel-path description data for each CHPID and update the information in one place. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/comments: unify copyright messages and remove file namesHeiko Carstens2012-07-201-3/+1
| | | | | | | | | | | | | | Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/cio/chp: cleanup attribute usageSebastian Ott2012-06-051-7/+5
| | | | | | | | | Let the driver core handle device attribute creation and removal. This will simplify the code and eliminates races between attribute availability and userspace notification via uevents. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: add missing module.h/export.h includesHeiko Carstens2011-11-011-0/+2
| | | | | | | | | | | | | Fix several compile errors on s390 caused by splitting module.h. Some include additions [e.g. qdio_setup.c, zfcp_qdio.c] are in anticipation of pending changes queued for s390 that increase the modular use footprint. [PG: added additional obvious changes since Heiko's original patch] Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* [S390] cio: update descriptor in chsc_chp_varySebastian Ott2010-10-251-6/+0
| | | | | | | | Update the channel path descriptor at the beginning of to the vary_on operation. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: add lock to struct channel_pathSebastian Ott2010-10-251-12/+23
| | | | | | | Serialize access to members of struct channel_path with a mutex. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* sysfs: add struct file* to bin_attr callbacksChris Wright2010-05-211-2/+3
| | | | | | | | | This allows bin_attr->read,write,mmap callbacks to check file specific data (such as inode owner) as part of any privilege validation. Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+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>
* tree-wide: fix assorted typos all over the placeAndré Goddard Rosa2009-12-041-1/+1
| | | | | | | | | | That is "success", "unknown", "through", "performance", "[re|un]mapping" , "access", "default", "reasonable", "[con]currently", "temperature" , "channel", "[un]used", "application", "example","hierarchy", "therefore" , "[over|under]flow", "contiguous", "threshold", "enough" and others. Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* [S390] cio: channel path memory leakMichael Ernst2009-10-061-1/+1
| | | | | | | | | Move dev_set_name to when we know that the device will actually be registered in order to avoid a memory leak if the allocated memory for the channel path has to be freed. Signed-off-by: Michael Ernst <mernst@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] proper use of device registerSebastian Ott2009-09-111-1/+2
| | | | | | | Don't use kfree directly after device registration started. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] split/move machine check handler codeHeiko Carstens2009-03-261-3/+3
| | | | | | | | Split machine check handler code and move it to cio and kernel code where it belongs to. No functional change. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] bus_id -> dev_set_name() changesCornelia Huck2008-10-101-2/+1
| | | | | | | | | | Convert most s390 users setting bus_id to dev_set_name(). css and ccw busses are deferred since they need some special treatment. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Correct cleanup on error.Cornelia Huck2008-09-091-3/+4
| | | | | | | | Fix cleanup on error in chp_new() and init_channel_subsystem() (must not call kfree() on structures that had been registered). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Cleanup cio printk messages.Michael Ernst2008-07-141-5/+2
| | | | | | | | Unnecessary dev_info, dev_warn and printk messages are removed. Signed-off-by: Michael Ernst <mernst@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] s390/cio: use memory_read_from_buffer()Akinobu Mita2008-07-141-9/+2
| | | | | | | | Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Add chsc subchannel driver.Cornelia Huck2008-07-141-1/+1
| | | | | | | | | | | | | This patch adds a driver for subchannels of type chsc. A device /dev/chsc is created which may be used to issue ioctls to: - obtain information about the machine's I/O configuration - dynamically change the machine's I/O configuration via asynchronous chsc commands Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: suppress chpid event in case of configure errorPeter Oberparleiter2008-07-141-6/+17
| | | | | | | | | Do not send CHP_ONLINE/CHP_OFFLINE events to subchannel drivers when a channel-path configure request failed. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: Repair chpid event handling.Cornelia Huck2008-07-141-3/+3
| | | | | | | | | | | | Passing the affected chpid in chp_event() worked only by chance since chpid is the first element in res_acc_data. Make it work properly by generalizing res_acc_data as chp_link and always passing around a properly filled out chp_link structure in chp_event(). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: Get rid of css_characteristics_avail.Cornelia Huck2008-07-141-2/+1
| | | | | | | | | Checking for the validity of the css_*_characteristics is superfluous since they stay 0 for non-successful scsc. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: Export some symbols for modular css drivers.Cornelia Huck2008-07-141-0/+1
| | | | | | Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: Cleanup crw interface.Cornelia Huck2008-07-141-7/+42
| | | | | | | | | | Eliminate the need for the machine check handler to call into the common I/O layer directly by introducing an interface to register handlers for crws per rsc. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: Rework css driver.Cornelia Huck2008-07-141-0/+20
| | | | | | | | | | | | Rework the css driver methods to provide sane callbacks for subchannels of all types. As a bonus, this cleans up and simplyfies the machine check handling for I/O subchannels a lot. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: Use to_channelpath() for device to channel path conversion.Cornelia Huck2007-10-221-6/+6
| | | | | | | We already have a macro for that, so let's use it consistently... Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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