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path: root/drivers/s390/cio/qdio.h
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* [S390] qdio: fix error reporting for hipersocketsJan Glauber2008-12-25
| | | | | | | | | | | | | | | | Hipersocket connections can encounter temporary busy conditions. In case of the busy bit set we retry the SIGA operation immediatelly. If the busy condition still persists after 100 ms we fail and report the error to the upper layer. The second stage retry logic is removed. In case of ongoing busy conditions the upper layer needs to reset the connection. The reporting of a SIGA error is now done synchronously to allow the network driver to requeue the buffers. Also no error trace is created for the temporary SIGA errors so the error message view is not flooded. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: improve inbound buffer acknowledgementJan Glauber2008-12-25
| | | | | | | | | | | | | | | - Use automatic acknowledgement of incoming buffers in QEBSM mode - Move ACK for non-QEBSM mode always to the newest buffer to prevent a race with qdio_stop_polling - Remove the polling spinlock, the upper layer drivers return new buffers in the same code path and could not run in parallel - Don't flood the error log in case of no-target-buffer-empty - In handle_inbound we check if we would overwrite an ACK'ed buffer, if so advance the pointer to the oldest ACK'ed buffer so we don't overwrite an empty buffer in qdio_stop_polling Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: rework debug feature loggingJan Glauber2008-12-25
| | | | | | | | | | | | | - make qdio_trace a per device view - remove s390dbf exceptions - remove CONFIG_QDIO_DEBUG, not needed anymore if we check for the level before calling sprintf - use snprintf for dbf entries - add start markers to see if the dbf view wrapped - add a global error view for all queues Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: fix qeth port count detectionJan Glauber2008-12-25
| | | | | | | | | | qeth needs to get the port count information before qdio has allocated a page for the chsc operation. Extend qdio_get_ssqd_desc() to store the data in the specified structure. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio enhanced SIGA (iqdio) support.Klaus-Dieter Wacker2008-10-10
| | | | | | | | Add support for z10 HiperSockets multiwrite SBALs on output queues. This is used on LPAR with EDDP enabled devices. Signed-off-by: Klaus-Dieter Wacker <kdwacker@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: speed up multicast traffic on full HiperSocket queueUrsula Braun2008-10-10
| | | | | | | | | | | | | If an asynchronous HiperSockets queue runs full, no further packet can be sent. In this case the next initiative to give transmitted skbs back to the stack is triggered only by a 10-seconds qdio timer. This timer has been introduced for low multicast traffic scenarios to guarantee freeing of skbs in a limited amount of time. For high HiperSocket multicast traffic scenarios progress checking on the outbound queue should be enforced by tasklet rescheduling. Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: new qdio driver.Jan Glauber2008-07-17
| | | | | | | | | | | | | | | | | | | List of major changes: - split qdio driver into several files - seperation of thin interrupt code - improved handling for multiple thin interrupt devices - inbound and outbound processing now always runs in tasklet context - significant less tasklet schedules per interrupt needed - merged qebsm with non-qebsm handling - cleanup qdio interface and added kerneldoc - coding style Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com> Reviewed-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] cio: Add chsc subchannel driver.Cornelia Huck2008-07-14
| | | | | | | | | | | | | 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: Introduce abstract isc definitions.Cornelia Huck2008-07-14
| | | | | | | | | | | | 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] qdio (new feature): enhancing info-retrieval from QDIO-adaptersUrsula Braun2008-04-17
| | | | | | | | | | Next generation of OSA adapters allows retrieval of further self-describing infos. This is the preparational infrastructure patch for further exploitation in the qeth driver. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] qdio: fix qdio_activate timeout handling.Heiko Carstens2008-02-19
| | | | | | | | | | | | | | | | | | | | | Current code in qdio_activate waits for at least 5 seconds until it returns. It may return earlier if an error occurs, but not if everything is ok. This large timeout value became visible with commit dfa77f611ff295598e218aa0eb6efa73a5cf26d0 "qdio: set QDIO_ACTIVATE_TIMEOUT to 5s", which intended to fix the timeout value which was zero. In turn setting an FCP adapter online took 5 seconds. In practice waiting for 5ms before continuing is sufficient as pointed out by Utz Bacher and Cornelia Huck. Cc: Utz Bacher <utz.bacher@de.ibm.com> Cc: Jan Glauber <jan.glauber@de.ibm.com> Cc: Ursula Braun <braunu@de.ibm.com> Cc: Martin Peschke <mp3@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: set QDIO_ACTIVATE_TIMEOUT to 5sUrsula Braun2008-01-26
| | | | | | | | Current definition of QDIO_ACTIVATE_TIMEOUT results in value 0. Thus it may cause endless wait in function qdio_activate(). Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: free skbs in finite amount of time in qethUrsula Braun2007-05-08
| | | | | | | | | | Free sent skbs in some finite amount of time. Affected are asynchronous queue of Hipersockets devices and the output queues of all eth-devices respectively. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [S390] qdio: make qdio statistics SMP-capableUrsula Braun2007-05-04
| | | | | | | | Use atomic_t/atomic64_t to make qdio performance statistics smp safe. Remove temporarily calculation of "total time of inbound actions". Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] runtime switch for qdio performance statisticsUrsula Braun2006-12-08
| | | | | | | | Remove CONFIG_QETH_PERF_STATS and use a sysfs attribute instead. We want to have the ability to turn the statistics on/off at runtime. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] non-unique constant/macro identifiers.Ursula Braun2006-12-04
| | | | | | | | | | | Add some prefixes to constands defined in drivers/s390/net/qdio.h and drivers/s390/lcs.h to make it possible to include the three header files drivers/s390/net/qeth.h, drivers/s390/net/qdio.h and drivers/net/s390/lcs.h in one C file. This is required for the patch that generates the kerntypes.o file for use by lcrash. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Inline assembly cleanup.Martin Schwidefsky2006-09-28
| | | | | | | | | | | | Major cleanup of all s390 inline assemblies. They now have a common coding style. Quite a few have been shortened, mainly by using register asm variables. Use of the EX_TABLE macro helps as well. The atomic ops, bit ops and locking inlines new use the Q-constraint if a newer gcc is used. That results in slightly better code. Thanks to Christian Borntraeger for proof reading the changes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] empty function defines.Heiko Carstens2006-09-20
| | | | | | | | Use do { } while (0) constructs instead of empty defines to avoid subtle compile bugs. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [PATCH] s390: Remove CVS generated informationHeiko Carstens2006-02-01
| | | | | | | | | | | | | - Remove all CVS generated information like e.g. revision IDs from drivers/s390 and include/asm-s390 (none present in arch/s390). - Add newline at end of arch/s390/lib/Makefile to avoid diff message. Acked-by: Andreas Herrmann <aherrman@de.ibm.com> Acked-by: Frank Pavlic <pavlic@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: cleanup KconfigMartin Schwidefsky2006-01-06
| | | | | | | | | | Sanitize some s390 Kconfig options. We have ARCH_S390, ARCH_S390X, ARCH_S390_31, 64BIT, S390_SUPPORT and COMPAT. Replace these 6 options by S390, 64BIT and COMPAT. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: introduce struct subchannel_idCornelia Huck2006-01-06
| | | | | | | | | | | | | | 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: Cornelia Huck <cohuck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: qdio V=V pass-throughFrank Pavlic2006-01-06
| | | | | | | | | | | | | | | | | | | New feature V=V qdio pass-through. QDIO and HiperSockets processing in z/VM V=V guest environments (as well as V=R with z/VM running in LPAR mode) requires shadowing of all QDIO architecture queue elements. Especially the shadowing of SBALs and SLSBs structures in the hypervisor, and the need to issue SIGA SYNC operations to observe state changes, eventually causes significant CPU processing overhead in the hypervisor. The QDIO pass-through support for V=V guests avoids the shadowing of SBALs and SLSBs. This significantly reduces the hypervisor overhead for QDIO based I/O. Signed-off-by: Frank Pavlic <pavlic@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: "extern inline" -> "static inline"Adrian Bunk2005-11-09
| | | | | | | | | "extern inline" -> "static inline" Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: debug feature changesMichael Holzheu2005-06-25
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the memory allocation method for the s390 debug feature. Trace buffers had been allocated using the get_free_pages() function before. Therefore it was not possible to get big memory areas in a running system due to memory fragmentation. Now the trace buffers are subdivided into several subbuffers with pagesize. Therefore it is now possible to allocate more memory for the trace buffers and more trace records can be written. In addition to that, dynamic specification of the size of the trace buffers is implemented. It is now possible to change the size of a trace buffer using a new debugfs file instance. When writing a number into this file, the trace buffer size is changed to 'number * pagesize'. In the past all the traces could be obtained from userspace by accessing files in the "proc" filesystem. Now with debugfs we have a new filesystem which should be used for debugging purposes. This patch moves the debug feature from procfs to debugfs. Since the interface of debug_register() changed, all device drivers, which use the debug feature had to be adjusted. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: default storage keyPeter Oberparleiter2005-05-01
| | | | | | | | | Provide an easy way to define a non-zero storage key at compile time. This is useful for debugging purposes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-16
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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