- 08 Dec, 2006 1 commit
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Martin Schwidefsky authored
Signed-off-by:Martin Schwidefsky <schwidefsky@de.ibm.com>
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- 04 Dec, 2006 2 commits
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Cornelia Huck authored
If I/O was running on a just varied off chpid, it will be terminated. If this was a common I/O layer internal I/O, it needs to be retried. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
If the last path to a device is gone after a chpid has been varied off, putting it on the slow queue doesn't prevent a device driver from still attempting to use it (it may stay on the slow queue for a long time). Instead, trigger a verify event which will prevent I/O attempts from the device driver immediately. Signed-off-by:
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- 18 Oct, 2006 1 commit
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Peter Oberparleiter authored
Reset device operational notification flag when channel paths become unavailable during path verification. Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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- 11 Oct, 2006 4 commits
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Cornelia Huck authored
Signed-off-by:
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Cornelia Huck authored
The grace period handling introduced needless complexity. It didn't help the dasd driver (which can handle terminated I/O just well), and it doesn't help for long running channel programs (which won't complete during the grace period anyway). Terminating I/O using a path that just disappeared immediately is much more consistent with what the user expects. Signed-off-by:
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Cornelia Huck authored
Use the proper structures to identify device and subchannel. Change get_disc_ccwdev_by_devno() to get_disc_ccwdev_by_dev_id(). Signed-off-by:
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Cornelia Huck authored
Signed-off-by:
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- 04 Oct, 2006 1 commit
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Cornelia Huck authored
While the machine owns us an interrupt in these cases (and we should get one), reality isn't always like that... Signed-off-by:
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- 20 Sep, 2006 2 commits
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Peter Oberparleiter authored
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:
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Heiko Carstens authored
Previous patch that was intended to reduce stack usage within common i/o layer didn't consider implicit memset(..., 0, ...) used with the initializations used before. Add these missing memsets wherever it's not obvious that the concerned memory region is zeroed. This should give the same semantics as before. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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- 30 Aug, 2006 1 commit
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Heiko Carstens authored
Use different kind of assignment to make sure gcc doesn't create code that creates temp variables on the stack, assigns values to it and copies the content of the whole temp variable to the destination. This reduces stack usage of e.g. ccwgroup_driver_register from 976 to 48 bytes instead. Signed-off-by:
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- 07 Aug, 2006 1 commit
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Peter Oberparleiter authored
I/O on a CCW device may stall if a channel path to that device is logicaly varied off/on. A user I/O interrupt can get misinterpreted as interrupt for an internal path verification operation due to a missing check and is therefore never reported to the device driver. Correct check for pending interruptions before starting path verification. Signed-off-by:
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- 27 Jul, 2006 1 commit
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Peter Oberparleiter authored
In special conditions where a subchannel rejects the HALT I/O- instruction with a busy indication (cc 2), I/O may stall. I/O request termination logic retries HALT I/O indefinitely because it expects HALT I/O to alter the subchannel status which is not true when cc 2 is returned. In case of a busy indication, try CLEAR I/O instruction immediately. Signed-off-by:
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- 12 Jul, 2006 1 commit
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Cornelia Huck authored
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:
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- 30 Jun, 2006 1 commit
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Jörn Engel authored
Signed-off-by:
Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by:
Adrian Bunk <bunk@stusta.de>
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- 29 Jun, 2006 2 commits
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Cornelia Huck authored
Fixes for several channel measurement facility bugs: * Blocks copied from the hardware might not be consistent. Solve this by moving the copying into idle state and repeating the copying. * avg_sample_interval changed with every read, even though no new block was available. Solve this by storing a timestamp when the last new block was received. * Several locking issues. * Measurements were not reenabled after a disconnected device became available again. * Remove #defines for ioctls that were never implemented. Signed-off-by:
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Cornelia Huck authored
After setting a path to a dasd offline at the SE, I/O hangs on that dasd for 5 minutes, then continues. I/O for which an interrupt will not be reported after the channel path has been disabled was not terminated by the common I/O layer, causing the dasd MIH to hit after 5 minutes. Be more aggressive in terminating I/O after setting a channel path offline. Also make sure to generate a fake irb if the device driver issues an I/O request after being notified of the killed I/O and clear residual information from the irb before trying to start the delayed verification. Signed-off-by:
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- 05 Jun, 2006 1 commit
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Cornelia Huck authored
From: Cornelia Huck <cornelia.huck@de.ibm.com> Swapped memcpy arguments in ccw_device_irq() when doing basic sense after unsolicited interrupt. Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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- 24 Mar, 2006 1 commit
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Cornelia Huck authored
When cio waits for the interrupt for a basic sense, interrupts for hsch() or csch() issued in the meantime are wrongly counted as interrupts for the basic sense and the accumulated irb is passed to the device driver. In ccw_device_w4sense(), check for clear or halt function in the irb and pass the irb for the csch() or hsch() to the device driver. Signed-off-by:
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- 14 Jan, 2006 1 commit
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Cornelia Huck authored
Signed-off-by:
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- 06 Jan, 2006 2 commits
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Cornelia Huck authored
Add support for multiple subchannel sets. Works with arbitrary devices in subchannel set 1 and is transparent to device drivers. Although currently only two subchannel sets are available, this will work with the architectured maximum number of subchannel sets as well. Signed-off-by:
Cornelia Huck <cohuck@de.ibm.com> Signed-off-by:
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Cornelia Huck authored
This patch introduces a struct subchannel_id containing the subchannel number (formerly referred to as "irq") and switches code formerly relying on the subchannel number over to it. While we're touching inline assemblies anyway, make sure they have correct memory constraints. Signed-off-by:
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- 30 Oct, 2005 1 commit
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Tim Schmielau authored
I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by:
Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by:
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- 05 Sep, 2005 1 commit
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Cornelia Huck authored
Common i/o layer changes: - Collect the irb at the correct subchannel when waiting for the clear interrupt during subchannel cleaning befor reIPL - don't stop at the first interrupt that comes in. - Change "extern __inline__" to "static inline". - Remove unneeded qdio includes. Signed-off-by:
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- 29 Jul, 2005 1 commit
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Cornelia Huck authored
Close a small window where a device may be not operational again after senseid finished and the "same device" check fails due to dev=0000 by checking for dnv after stsch() by then setting the device to not operational. (No need to check for dnv in ccw_device_handle_oper() again since we don't do stsch() into the subchannel's schib in the meantime and will get a crw anyway if the device becomes not oper again). Signed-off-by:
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- 16 Apr, 2005 1 commit
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Linus Torvalds authored
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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