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path: root/drivers/s390/cio/cio.c
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2008-12-25[S390] cio: get rid of compile warningHeiko Carstens
Move cio_tpi() to the rest of the CONFIG_CCW_CONSOLE functions to get rid of this one: drivers/s390/cio/cio.c:115: warning: 'cio_tpi' defined but not used Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-10[S390] Move private simple udelay function to arch/s390/lib/delay.c.Heiko Carstens
Move cio's private simple udelay function to lib/delay.c and turn it into something much more readable. So we have all implementations at one place. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-10[S390] cio: fix cio_tpi.Heiko Carstens
In cio_tpi only disable bottom halves when not in interrupt context. Otherwise a WARN_ON gets triggered. Besides that, when we are in interrupt context bottom halves are disabled anyway. Fixes this one: Badness at kernel/softirq.c:77 Modules linked in: CPU: 2 Not tainted 2.6.26 #4 Process swapper (pid: 0, task: 000000003fe83db0, ksp: 000000003fea7d28) Krnl PSW : 0404c00180000000 0000000000053f4e (__local_bh_disable+0xbe/0xcc) R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3 Krnl GPRS: 0000000000008ee0 00000000005f95e0 0000000000000000 0000000000000001 000000000020be92 0000000000000000 0000000000000210 00000000005d36c0 000000003fb5f4d8 0000000000000000 000000000020bed0 000000003fb5f3c8 00000000009be920 0000000000364898 000000003fb5f408 000000003fb5f3c8 Krnl Code: 0000000000053f42: bf2f1000 icm %r2,15,0(%r1) 0000000000053f46: a774ffc5 brc 7,53ed0 0000000000053f4a: a7f40001 brc 15,53f4c >0000000000053f4e: a7280001 lhi %r2,1 0000000000053f52: 50201000 st %r2,0(%r1) 0000000000053f56: a7f4ffbd brc 15,53ed0 0000000000053f5a: 0707 bcr 0,%r7 0000000000053f5c: a7f13fc0 tmll %r15,16320 Call Trace: ([<0000000000000210>] 0x210) [<0000000000053f86>] local_bh_disable+0x2a/0x38 [<000000000020bed0>] wait_cons_dev+0xd4/0x154 [<0000000000247cb2>] raw3215_make_room+0x6a/0x1a8 [<000000000024861a>] raw3215_write+0x86/0x28c [<00000000002488a0>] con3215_write+0x80/0x110 [<000000000004c3e0>] __call_console_drivers+0xc8/0xe4 [<000000000004c47e>] _call_console_drivers+0x82/0xc4 [<000000000004c744>] release_console_sem+0x218/0x2c0 [<000000000004cf64>] vprintk+0x3c0/0x504 [<0000000000354a4a>] printk+0x52/0x64 [<0000000000088004>] __print_symbol+0x40/0x50 [<0000000000071dbc>] print_stack_trace+0x78/0xac [<0000000000079e78>] print_lock_dependencies+0x148/0x208 [<000000000007a050>] print_irq_inversion_bug+0x118/0x15c [<000000000007a106>] check_usage_forwards+0x72/0x84 [<000000000007a36e>] mark_lock+0x1d2/0x594 [<000000000007baca>] __lock_acquire+0x886/0xf48 [<000000000007c234>] lock_acquire+0xa8/0xe0 [<0000000000350316>] _write_lock+0x56/0x98 [<000000000026cd92>] zfcp_erp_adapter_reopen+0x4e/0x8c [<000000000026f1e8>] zfcp_qdio_int_resp+0x2e4/0x2f4 [<00000000002210f4>] qdio_int_handler+0x274/0x888 [<00000000002177b6>] ccw_device_call_handler+0x6e/0xd8 [<0000000000215336>] ccw_device_irq+0xd6/0x160 [<0000000000212f88>] io_subchannel_irq+0x8c/0x118 [<000000000020c120>] do_IRQ+0x1d0/0x1fc [<00000000000270b2>] io_return+0x0/0x8 [<000000000001c8a4>] cpu_idle+0x178/0x21c ([<000000000001c884>] cpu_idle+0x158/0x21c) [<00000000003483a2>] start_secondary+0xb6/0xc8 INFO: lockdep is turned off. Last Breaking-Event-Address: [<0000000000053f4a>] __local_bh_disable+0xba/0xcc Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-10[S390] cio: inline assembly cleanupPeter Oberparleiter
Fix incorrect in- and output constraints, remove volatile declaration of inline assembly parameters and reformat constraint declarations to be more consistent. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-10-10[S390] bus_id -> dev_set_name() for css and ccw bussesCornelia Huck
Convert remaining s390 users setting bus_id to dev_set_name() or init_name. 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>
2008-10-10[S390] bus_id -> dev_name conversionsKay Sievers
bus_id -> dev_name() conversions in s390 code. [cornelia.huck@de.ibm.com: minor adaptions] Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: 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>
2008-09-16[S390] cio: fix orb initialization in cio_start_keyStefan Weinhuber
The functions cio_tm_start_key and cio_start_key use the same private orb structure of a subchannel, so the orb needs to be cleared of old data before it is used again. A respective memset is missing from cio_start_key and hereby added. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-09-09[S390] cio: handle ssch() return codes correctly.Cornelia Huck
ssch() has two classes of return codes: - condition codes (0-3) which need to be translated to Linux error codes - Linux error codes (-EIO on exceptions) which should be passed to the caller (instead of erronously being handled like condition code 3) Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-07-14[S390] Cleanup cio printk messages.Michael Ernst
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>
2008-07-14[S390] cio: Add chsc subchannel driver.Cornelia Huck
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>
2008-07-14[S390] cio: Use isc_{register,unregister}.Cornelia Huck
Use the new isc registration functions for all places that need an I/O interruption subclass. 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>
2008-07-14[S390] cio: Allow adapter interrupt handlers per isc.Cornelia Huck
Enhance the adapter interruption API so that device drivers can register a handler for a specific interruption subclass. This will allow different device drivers to move to differently prioritized subclasses in order to avoid congestion. 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>
2008-07-14[S390] cio: Introduce abstract isc definitions.Cornelia Huck
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>
2008-07-14[S390] cio: provide functions for fcx enabled I/OPeter Oberparleiter
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>
2008-07-14[S390] cio: introduce fcx enabled scsw formatPeter Oberparleiter
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>
2008-07-14[S390] cio: Base message subchannel handling.Cornelia Huck
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>
2008-07-14[S390] cio: Export some symbols for modular css drivers.Cornelia Huck
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>
2008-07-14[S390] cio: Rework css driver.Cornelia Huck
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>
2008-07-14[S390] cio: Register all subchannels.Cornelia Huck
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>
2008-07-14[S390] cio: Clear correct bit in cio_release_console().Cornelia Huck
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>
2008-06-10[S390] cio: Fix inverted isc priorities.Cornelia Huck
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>
2008-05-07[S390] cio: Remove cio_msg kernel parameter.Michael Ernst
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>
2008-04-30[S390] cio: Make isc handling more robust.Cornelia Huck
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>
2008-04-17[S390] Fix a lot of sparse warnings.Heiko Carstens
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>
2008-04-17[S390] Convert s390 to GENERIC_CLOCKEVENTS.Heiko Carstens
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>
2008-04-17[S390] Convert monitor calls to function calls.Heiko Carstens
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>
2008-01-26[S390] usage of s390dbf: shrink number of debug areas to use.Peter Tiedemann
Signed-off-by: Peter Tiedemann <ptiedem@de.ibm.com>
2008-01-26[S390] cio: memory leak in cio processingMichael Ernst
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>
2008-01-26[S390] cio: I/O subchannel specific fields.Cornelia Huck
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>
2008-01-26[S390] cio: Extend adapter interrupt interface.Peter Oberparleiter
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>
2008-01-26[S390] cio: Introduce subchannel->private.Cornelia Huck
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>
2008-01-26[S390] cio: Cleanup debug feature usage.Cornelia Huck
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>
2008-01-26[S390] cio: css_driver: Use consistent parameters.Cornelia Huck
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>
2007-10-12[S390] cio: Disable channel measurements (cmf) on shutdown/reboot.Cornelia Huck
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>
2007-07-27[S390] cio: Clean up messages.Cornelia Huck
- 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>
2007-04-27[S390] cio: Channel-path configure function.Peter Oberparleiter
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>
2007-04-27[S390] cio: Introduce separate files for channel-path related code.Peter Oberparleiter
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>
2007-04-27[S390] cio: Introduce struct chp_id.Peter Oberparleiter
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>
2007-04-27[S390] cio/ipl: Clean interface between cio and ipl code.Heiko Carstens
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>
2007-02-21[S390] nss: Free unused memory in kernel image.Heiko Carstens
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>
2007-02-21[S390] New header file ipl.hMichael Holzheu
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>
2007-02-05[S390] Avoid excessive inlining.Heiko Carstens
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-02-05[S390] Convert memory detection into C code.Heiko Carstens
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>
2007-02-05[S390] ETR support.Martin Schwidefsky
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>
2007-02-05[S390] cio: Don't spam debug feature.Cornelia Huck
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>
2007-01-09[S390] cio: use barrier() in stsch_reset.Heiko Carstens
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>
2006-12-28[S390] cio: fix stsch_reset.Michael Holzheu
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>
2006-12-15[S390] Fix reboot hang on LPARsMichael Holzheu
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>
2006-12-08[S390] Support for disconnected devices reappearing on another subchannel.Cornelia Huck
- 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>
2006-12-08[S390] subchannel lock conversion.Cornelia Huck
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>