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path: root/drivers/s390/cio/qdio.h
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* s390/qdio: cleanup chsc SADC usageSebastian Ott2013-06-261-20/+0
| | | | | | | | | | Move the code to issue the set adapter device controls command to chsc.c and make it accessible for the qdio code via the wrapper chsc_sadc. Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/qdio: cleanup chsc SSQD usageSebastian Ott2013-06-261-14/+0
| | | | | | | | | | Cleanup the function qdio_setup_get_ssqd. Fix some possible memleaks and an unchecked allocation and create a wrapper for SSQD in chsc.c . Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.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] qdio: prevent dsci access without adapter interruptsJan Glauber2011-10-301-27/+2
| | | | | | | | | | | | | | | | | | A kernel panic may occur during sending or receiving network packets on a machine without adapter interrupts since commit d36deae. The bug is triggered by writing to the shared indicator address which is set to 0 if the machine doesn't have adapter interrupts. Make the reading and setting of the shared indicator dependent on the adapter interrupt feature and while at it move the code to the file containing the adapter interrupt related code. Thanks to Jan Jaeger for tracking this down. Reported-by: Jan Jaeger <jan.jaeger@westnet.com.au> Tested-by: Jan Jaeger <jan.jaeger@westnet.com.au> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: remove multicast pollingJan Glauber2011-10-301-8/+0
| | | | | | | | The multicast poll check for the outbound queue is redundant since 3d6c76f "[S390] qdio: outbound tasklet scan threshold". Remove the check. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: add timestamp for last queue scan timeJan Glauber2011-10-301-0/+5
| | | | | | | | | | Add a timestamp per queue and update the timestamp when the queue is scanned. Add the queue timestamps and the timestamp of the last adapter interrupt to the debugfs output. The timestamps are useful for debugging stall conditions. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* qdio: support forced signal adapter indicationsfrank.blaschka@de.ibm.com2011-08-131-9/+0
| | | | | | | | | | This patch ensures that signal adapter commands are issued if they are indicated to be required. Signed-off-by: Einar Lueck <elelueck@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* qdio: support asynchronous delivery of storage blocksfrank.blaschka@de.ibm.com2011-08-131-2/+27
| | | | | | | | | | | This patch introduces support for asynchronous delivery of storage blocks for Hipersockets. Upper layers may exploit this functionality to reuse SBALs for which the delivery status is still pending. Signed-off-by: Einar Lueck <elelueck@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [S390] qdio: 2nd stage retry on SIGA-W busy conditionsJan Glauber2011-08-031-0/+2
| | | | | | | | | | | | | | | The SIGA-W may return with the busy bit set which means the device was blocked. The busy loop which retries the SIGA-W for 100us may not be long enough when running under a heavily loaded hypervisor. Extend the retry mechanism by adding a longer second stage which retries the SIGA-W for up to 10s. In difference to the first retry loop the second stage is using mdelay to stop the cpu between the retries and thereby avoid additional preassure in on the hypervisor. If the second stage retry is successfull a device reset is avoided. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] qdio: cleanup SIGA syncJan Glauber2011-01-051-8/+8
| | | | | | | | Simplify the SIGA sync code and add unlikely annotations. In polling mode SBALs may be accessed without interrupt, so call SIGA sync before every scan. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: remove enhanced SIGAJan Glauber2011-01-051-2/+0
| | | | | | | | | | HiperSocket devices only use one SBAL per qdio call without the enhanced SIGA feature. Since that feature is currently not used remove it from the qdio code so the compiler can generate better code for the HiperSocket outbound path. While at it mark the SIGA error conditions as unlikely. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: use proper QEBSM operand for SIGA-R and SIGA-SJan Glauber2011-01-051-0/+6
| | | | | | | | | | | If QIOASSIST is enabled for a qdio device the SIGA instruction requires a modified function code. This function code modifier was missing for SIGA-R and SIGA-S which can lead to a kernel panic caused by an operand exception. Cc: stable@kernel.org Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: outbound queue full counterJan Glauber2011-01-051-0/+1
| | | | | | | Add a counter for outbound queue full events to the qdio statistics. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: outbound tasklet scan thresholdJan Glauber2011-01-051-0/+2
| | | | | | | | | | | | | | | | | | Introduce a scan treshold for the qdio outbound queues. By setting the threshold the driver can tell qdio after how much used SBALs qdio should schedule the outbound tasklet that scans the queue for finished SBALs. The threshold is specific by the drivers because a Hipersockets device is much faster in utilizing outbound buffers than a ZFCP or OSA device. The default values after how many used SBALs the tasklet should run are: OSA: > 31 SBALs Hipersockets: > 7 SBALs zfcp: > 55 SBALs Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: prevent race for shared indicatorsJan Glauber2011-01-051-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the shared indicator is used the following race leads to an inbound stall: Device CPU0 CPU1 ======================================================== non-shared DSCI =>1 ALSI => 1 Thin INT ALSI => 0 non-shared DSCI tasklets scheduled shared DSCI => 1 ALSI => 1 shared DSCI => 0 ALSI ? -> set Thin INT ALSI => 0 ALSI was set, shared DSCI => 1 After that no more interrupts occur because the DSCI is still set. Fix that race by only resetting the shared DSCI if it was actually set so the tasklets for all shared devices are scheduled and will run after the interrupt. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* qdio: extend API to allow pollingJan Glauber2010-09-081-0/+29
| | | | | | | | | | | | | | | | | | | | | | Extend the qdio API to allow polling in the upper-layer driver. This is needed by qeth to use NAPI. To use the new interface the upper-layer driver must specify the queue_start_poll(). This callback is used to signal the upper-layer driver that is has initiative and must process the inbound queue by calling qdio_get_next_buffers(). If the upper-layer driver wants to stop polling it calls qdio_start_irq(). Since adapter interrupts are not completely stoppable qdio implements a software bit QDIO_QUEUE_IRQS_DISABLED to safely disable interrupts for an input queue. The old interface is preserved and will be used as is by zfcp. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [S390] qdio: dont convert timestamps to microsecondsJan Glauber2010-05-171-7/+2
| | | | | | | | Don't convert timestamps to microseconds, use timestamps returned by get_clock() directly. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: remove memset hackJan Glauber2010-05-171-4/+2
| | | | | | | | Remove memset hack that relied on the layout of struct qdio_q to avoid deletion of the slib pointer. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: optimize cache line usage of struct qdio_irqJan Glauber2010-02-261-6/+3
| | | | | | | | | | | | Remove a memset hack that relied on the internal layout of the qdio_irq struct and move the per device statistics data into an own cache line to avoid cache line bashing between the inbound and the outbound queue tasklets. Also reduce the number of allocated queues from 32 to 4 which is the current maximum. That saves a cache line in struct qdio_irq. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: account processed SBAL during queue scanJan Glauber2010-02-261-31/+54
| | | | | | | | | | | | | | Add counters for the number of processed SBALs. The numbers summarize how many SBALs were processed at each queue scan and indicate the utilization of the queue. Furthermore the number of unsuccessfull queue scans, SBAL errors and the total number of processed SBALs are accounted. Also regroup struct qdio_q to move read-mostly and write-mostly data into different cachelines. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: convert global statistics to per-device statsJan Glauber2010-01-041-1/+35
| | | | | | | | | | | | | | Revamp the qdio performance statistics and move them from procfs to debugfs using the seq_file interface. Since the statistics are not intended for the general user the removal of /proc/qdio_perf should not surprise anyone. The per device statistics are disabled by default, writing 1 to /<debugfs mountpoint>/qdio/<device bus ID>/statistics enables the statistics for the given device. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: remove limited number of debugfs entriesJan Glauber2009-09-111-1/+3
| | | | | | | | The number of qdio debugfs entries was limited. Remove this limit and group the queue files in a per device directory. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: move adapter interrupt tasklet codeJan Glauber2009-06-221-9/+2
| | | | | | | | Move the adapter interrupt tasklet function to the qdio main code since all the functions used by the tasklet are located there. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: merge inbound and outbound handler functionsJan Glauber2009-03-261-1/+1
| | | | | | | | | The inbound and outbound handlers are nearly identical if the outbound handler uses first_to_check as end index instead of last_move. Since both values are identical at that point the handlers can be merged. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: report SIGA errors directlyJan Glauber2009-03-261-1/+0
| | | | | | | | | | | | | | | Errors from SIGA instructions are stored in the per queue qdio_error and reported back when the queue handler is called. That opens a race when multiple error conditions occur simultanously. Report SIGA errors immediately in the return value of do_QDIO so the upper layer can react and SIGA errors no longer interfere with other errors. Move the SIGA error handling in qeth from the outbound handler to qeth_flush_buffers. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
* [S390] qdio: seperate last move index and polling indexJan Glauber2009-03-261-1/+4
| | | | | | | | | | The index value that indicated that the input queue moved was also used to store the index of the first acknowledged buffer. For non-qebsm only the newest buffer is acknowledged which may be different from the last move index so two seperate values are needed to track the input queue. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: fix error reporting for hipersocketsJan Glauber2008-12-251-7/+1
| | | | | | | | | | | | | | | | 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 Glauber2008-12-251-7/+12
| | | | | | | | | | | | | | | - 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 Glauber2008-12-251-0/+3
| | | | | | | | | | | | | - 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 Glauber2008-12-251-0/+3
| | | | | | | | | | 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 Wacker2008-10-101-0/+3
| | | | | | | | 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 Braun2008-10-101-0/+8
| | | | | | | | | | | | | 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 Glauber2008-07-171-547/+288
| | | | | | | | | | | | | | | | | | | 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 Huck2008-07-141-2/+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: Introduce abstract isc definitions.Cornelia Huck2008-07-141-1/+2
| | | | | | | | | | | | 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 Braun2008-04-171-0/+28
| | | | | | | | | | 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 Carstens2008-02-191-1/+1
| | | | | | | | | | | | | | | | | | | | | 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 Braun2008-01-261-1/+1
| | | | | | | | 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 Braun2007-05-081-1/+3
| | | | | | | | | | 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 Braun2007-05-041-15/+37
| | | | | | | | 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 Braun2006-12-081-17/+11
| | | | | | | | 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 Braun2006-12-041-3/+1
| | | | | | | | | | | 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 Schwidefsky2006-09-281-143/+49
| | | | | | | | | | | | 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 Carstens2006-09-201-8/+8
| | | | | | | | 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 Carstens2006-02-011-2/+0
| | | | | | | | | | | | | - 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 Schwidefsky2006-01-061-17/+17
| | | | | | | | | | 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 Huck2006-01-061-12/+14
| | | | | | | | | | | | | | 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 Pavlic2006-01-061-34/+70
| | | | | | | | | | | | | | | | | | | 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 Bunk2005-11-091-4/+4
| | | | | | | | | "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 Holzheu2005-06-251-8/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | 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>
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