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* [S390] cio: Introduce abstract isc definitions.Cornelia Huck2008-07-141-6/+7
| | | | | | | | | | | | Replace the numeric values for I/O interruption subclass usage with abstract definitions and collect them all in asm/isc.h. This gives us a better overview of which iscs are actually used and makes it possible to better spread out isc usage in the future. 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: provide functions for fcx enabled I/OPeter Oberparleiter2008-07-141-11/+70
| | | | | | | | | Provide functions for assembling and starting fcx enabled I/O request blocks. 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: introduce fcx enabled scsw formatPeter Oberparleiter2008-07-141-7/+7
| | | | | | | | | | Extend the scsw data structure to the format required by fcx. Also provide helper functions for easier access to fields which are present in both the traditional as well as the modified format. 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: Base message subchannel handling.Cornelia Huck2008-07-141-6/+24
| | | | | | 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 Huck2008-07-141-6/+10
| | | | | | 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/+1
| | | | | | | | | | | | 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: Register all subchannels.Cornelia Huck2008-07-141-75/+51
| | | | | | | | | Register all valid subchannels, not only I/O subchannels. Move I/O subchannel specific initialization to io_subchannel_probe(). 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: Clear correct bit in cio_release_console().Cornelia Huck2008-07-141-1/+1
| | | | | | | | Fallout from the console isc 7 -> 1 change. 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: Fix inverted isc priorities.Cornelia Huck2008-06-101-9/+11
| | | | | | | | | | | Priorities for I/O interruption subclasses range from 0 (highest) to 7 (lowest). Unfortunately, the console has been using isc 7 instead of an isc with a higher priority than regular I/O subchannels (which use 3). Fix this by making the console use isc 1. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Remove cio_msg kernel parameter.Michael Ernst2008-05-071-29/+10
| | | | | | | | | The only sporadically used CIO_DEBUG messages are replaced by ordinary CIO_MSG_EVENT messages. The CIO_MSG_EVENT messages debug levels are consolidated. Signed-off-by: Michael Ernst <mernst@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Make isc handling more robust.Cornelia Huck2008-04-301-5/+4
| | | | | | | | | Introduce an ->isc field in the subchannel to store the desired interruption subclass, since sch->schib.pmcw.isc may be overwritten by the hardware on stsch() after machine checks. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Fix a lot of sparse warnings.Heiko Carstens2008-04-171-7/+11
| | | | | | | | | | | Most noteable part of this commit is the new local header file entry.h which contains all the function declarations of functions that get only called from asm code or are arch internal. That way we can avoid extern declarations in C files. This is more or less the same that was done for sparc64. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] Convert s390 to GENERIC_CLOCKEVENTS.Heiko Carstens2008-04-171-6/+3
| | | | | | | | This way we get rid of s390's NO_IDLE_HZ and use the generic dynticks variant instead. In addition we get high resolution timers for free. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] Convert monitor calls to function calls.Heiko Carstens2008-04-171-1/+2
| | | | | | | | | | Remove the program check generating monitor calls and use function calls instead. Theres is no real advantage in using monitor calls, but they do make debugging harder, because of all the program checks it generates. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] usage of s390dbf: shrink number of debug areas to use.Peter Tiedemann2008-01-261-3/+3
| | | | Signed-off-by: Peter Tiedemann <ptiedem@de.ibm.com>
* [S390] cio: memory leak in cio processingMichael Ernst2008-01-261-2/+5
| | | | | | | | Allocated kernel memory for locks is not freed in case of subchannel found to be invalid. Signed-off-by: Michael Ernst <mernst@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: I/O subchannel specific fields.Cornelia Huck2008-01-261-12/+12
| | | | | | | | | Some fields may be !0 only for I/O subchannels. Add some checks where required. Also adapt cio_enable_subchannel() to make the caller specify the intparm, which makes it more generic. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Extend adapter interrupt interface.Peter Oberparleiter2008-01-261-1/+1
| | | | | | | | | | | | | | | From: Cornelia Huck <cornelia.huck@de.ibm.com> Change the adapter interrupt interface in order to allow multiple adapter interrupt handlers to be registered. Indicators are now allocated by cio instead of the device driver. The qdio parts have been Acked-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Introduce subchannel->private.Cornelia Huck2008-01-261-17/+26
| | | | | | | | | | | | Introduce a private pointer in struct subchannel to store per-subchannel type data (cannot use dev->priv since this is already used for something else). Create a new header io_sch.h for I/O subchannel specific structures and instructions. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Cleanup debug feature usage.Cornelia Huck2008-01-261-20/+18
| | | | | | | | | | | | Cleanup cio_debug.h. Also make CIO_DEBUG add the "cio:" prefix to the printk string so that it isn't needed for the debug feature. Fix outdated comments for cio_debug_init() and clean it up. Enlarge cio_crw to the same size as cio_msg so we may actually find some relevant information there. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: css_driver: Use consistent parameters.Cornelia Huck2008-01-261-2/+2
| | | | | | | | Make all callbacks in css_driver take a struct subchannel (and not a struct device). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Disable channel measurements (cmf) on shutdown/reboot.Cornelia Huck2007-10-121-0/+5
| | | | | | | | | Disable channel measurements for all ccw devices via the ccw bus's shutdown method. Clear residual cmf related information that may be in the schib when setting up a new subchannel. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Clean up messages.Cornelia Huck2007-07-271-7/+6
| | | | | | | | | | - Remove unneeded messages. - Move some messages into the debug feature. - Use dev_* where appropriate. - Use "cio: " prefix consistently. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Channel-path configure function.Peter Oberparleiter2007-04-271-0/+1
| | | | | | | | | | | Add a new attribute to the channel-path sysfs directory through which channel-path configure operations can be triggered. Also listen for hardware events requesting channel-path configure operations and process them accordingly. 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: Introduce separate files for channel-path related code.Peter Oberparleiter2007-04-271-3/+5
| | | | | | 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: Introduce struct chp_id.Peter Oberparleiter2007-04-271-1/+4
| | | | | | | | Introduce data type for channel-path IDs. 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/ipl: Clean interface between cio and ipl code.Heiko Carstens2007-04-271-28/+10
| | | | | | | Clean interface between cio and ipl code, so Peter stops complaining. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] nss: Free unused memory in kernel image.Heiko Carstens2007-02-211-1/+1
| | | | | | | | | | With CONFIG_SHARED_KERNEL the kernel text segment that might be in a read only memory sections starts at 1MB. Memory between 0x12000 and 0x100000 is unused then. Free this, so we have appr. an extra MB of memory available. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] New header file ipl.hMichael Holzheu2007-02-211-0/+1
| | | | | | | | | Setup.h has been misused for ipl related stuff in the past. We now move everything, which has to do with ipl and reipl to a new header file named "ipl.h". Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Avoid excessive inlining.Heiko Carstens2007-02-051-4/+4
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Convert memory detection into C code.Heiko Carstens2007-02-051-5/+5
| | | | | | | | | | | | | | Hopefully this will make it more maintainable and less error prone. Code makes use of search_exception_tables(). Since it calls this function before the kernel exeception table is sorted, there is an early call to sort_main_extable(). This way it's easy to use the already present infrastructure of fixup sections. Also this would allows to easily convert the rest of head[31|64].S into C code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] ETR support.Martin Schwidefsky2007-02-051-2/+15
| | | | | | | | | | | | | This patch adds support for clock synchronization to an external time reference (ETR). The external time reference sends an oscillator signal and a synchronization signal every 2^20 microseconds to keep the TOD clocks of all connected servers in sync. For availability two ETR units can be connected to a machine. If the clock deviates for more than the sync-check tolerance all cpus get a machine check that indicates that the clock is out of sync. For the lovely details how to get the clock back in sync see the code below. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Don't spam debug feature.Cornelia Huck2007-02-051-1/+1
| | | | | | | | Lower priority of "Blacklisted device detected" messages so we don't overwrite more useful messages. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: use barrier() in stsch_reset.Heiko Carstens2007-01-091-8/+4
| | | | | | | | | | | | | Use barrier() in stsch_reset() instead of duplicating the stsch() inline assembly and adding "memory" to the clobberlist. Pointed out by Chuck Ebbert. Real fix would be to add a fixup section to the stsch() and extend the basic program check handler so it searches the exception tables in case of a program check. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: fix stsch_reset.Michael Holzheu2006-12-281-3/+10
| | | | | | | | | Copy inline assembly of stsch and add "memory" to clobber list in order to prevent gcc from optimizing away the checking of the global variable "pgm_check_occured". Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Fix reboot hang on LPARsMichael Holzheu2006-12-151-2/+23
| | | | | | | | | | | | | | Reboot hangs on LPARs without diag308 support. The reason for this is, that before the reboot is done, the channel subsystem is shut down. During the reset on each possible subchannel a "store subchannel" is done. This operation can end in a program check interruption, if the specified subchannel set is not implemented by the hardware. During the reset, currently we do not have a program check handler, which leads to the described kernel bug. We install now a new program check handler for the reboot code to fix this problem. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Support for disconnected devices reappearing on another subchannel.Cornelia Huck2006-12-081-1/+5
| | | | | | | | | | | - create a 'pseudo_subchannel' per channel subsystem (the 'orphanage') - use the orphanage as a shelter for ccw_devices that can't remain on the same subchannel Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] subchannel lock conversion.Cornelia Huck2006-12-081-17/+41
| | | | | | | | | | Convert the subchannel lock to a pointer to a lock. Needed for the dynamic subchannel mapping patch. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Reset infrastructure for re-IPL.Heiko Carstens2006-12-041-28/+100
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of re-IPL and diag308 doesn't work we have to reset all devices manually and wait synchronously that each reset finished. This patch adds the necessary infrastucture and the first exploiter of it. Subsystems that need to add a function that needs to be called at re-IPL may register/unregister this function via struct reset_call { struct reset_call *next; void (*fn)(void); }; void register_reset_call(struct reset_call *reset); void unregister_reset_call(struct reset_call *reset); When the registered function get called the context is: - all cpus beside the current one are stopped - all machine checks and interrupts are disabled - prefixing is disabled - a default machine check handler is available for use The registered functions may not take any locks are sleep. For the common I/O layer part of this patch: Introduce a reset_call css_reset that does the following: - clear all subchannels - perform a rchp on all channel paths and wait for the resulting machine checks This replaces the calls to clear_all_subchannels() and cio_reset_channel_paths() for kexec and ccw reipl. reipl_ccw_dev() now uses reipl_find_schid() to determine the subchannel id for a given device id. Also remove cio_reset_channel_paths() and friends since they are not needed anymore. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq change improvements.Heiko Carstens2006-10-111-2/+2
| | | | | | | | | | Remove the last few places where a pointer to pt_regs gets passed. Also make sure we call set_irq_regs() before irq_enter() and after irq_exit(). This doesn't fix anything but makes sure s390 looks the same like all other architectures. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq change build fixes.Heiko Carstens2006-10-061-1/+5
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: always query all paths on path verification.Peter Oberparleiter2006-09-201-4/+1
| | | | | | | | | | | | Reappearing channel paths are sometimes not utilized by CCW devices because path verification incorrectly relies on path-operational-mask information which is not updated until a channel path has been used again. Modify path verification procedure to always query all available paths to a device. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: update path groups on logical CHPID changes.Peter Oberparleiter2006-09-201-1/+1
| | | | | | | | | | | | CHPIDs that are logically varied off will not be removed from a CCW device's path group because resign-from-pathgroup command is issued with invalid path mask of 0 because internal CCW operations are masked by the logical path mask after the relevant bits are cleared by the vary operation. Do not apply logical path mask to internal operations. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] convert some assembler to C.Heiko Carstens2006-09-201-2/+36
| | | | | | | Convert GET_IPL_DEVICE assembler macro to C function. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] ipl/dump on panic.Michael Holzheu2006-09-201-10/+40
| | | | | | | | | | | | It is now possible to specify a ccw/fcp dump device which is used to automatically create a system dump in case of a kernel panic. The dump device can be configured under /sys/firmware/dump. In addition it is now possible to specify a ccw/fcp device which is used for the next reboot of Linux. The reipl device can be configured under /sys/firmware/reipl. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Fix sparse warnings.Heiko Carstens2006-07-121-1/+1
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] path grouping and path verifications fixes.Cornelia Huck2006-07-121-0/+1
| | | | | | | | | | | | | | | | | | 1. Multipath devices for which SetPGID is not supported are not handled well. Use NOP ccws for path verification (sans path grouping) when SetPGID is not supported. 2. Check for PGIDs already set with SensePGID on _all_ paths (not just the first one) and try to find a common one. Moan if no common PGID can be found (and use NOP verification). If no PGIDs have been set, use the css global PGID (as before). (Rationale: SetPGID will get a command reject if the PGID it tries to set does not match the already set PGID.) 3. Immediately before reboot, issue RESET CHANNEL PATH (rcp) on all chpids. This will remove the old PGIDs. rcp will generate solicited CRWs which can be savely ignored by the machine check handler (all other actions create unsolicited CRWs). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] subchannel register/unregister mutex.Cornelia Huck2006-07-121-0/+1
| | | | | | | | | | | Add a reg_mutex to prevent unregistering a subchannel before it has been registered. Since 2.6.17, we've seen oopses in kslowcrw when a device is found to be not operational during sense id when doing initial device recognition; it is not clear yet why that particular problem was not (yet) observed with earlier kernels... Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [PATCH] lockdep: irqtrace subsystem, s390 supportHeiko Carstens2006-07-031-1/+1
| | | | | | | | | | | irqtrace support for s390. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
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