summaryrefslogtreecommitdiffstats
path: root/drivers/s390 (follow)
Commit message (Collapse)AuthorAgeFilesLines
* [S390] zcrypt: fix ap_device_list handlingRalph Wuerthner2008-03-051-5/+7
| | | | | | | | | | In ap_device_probe() we can add the new ap device to the internal device list only if the device probe function successfully returns. Otherwise we might end up with an invalid device in the internal ap device list. Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp_vt220: speed up console output for interactive workChristian Borntraeger2008-03-051-1/+1
| | | | | | | | | | Currently an output buffer can wait up to HZ/2 until the buffer is flushed. The wait time is noticeable in interactive tools like mc. Change the value to HZ/20, which seems enough for interactive work. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: fix reference counting in display method for proc/dasd/devicesStefan Weinhuber2008-03-051-1/+3
| | | | | | | | | | | Using the /proc/dasd/devices interface leaves the reference counter of alias devices in an inconsistent state. A process that tries to set such a device offline afterwards will hang. The dasd_devices_show function returns immediately for alias devices and this code path was missing a dasd_put_device call. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: let dasd erp matching recognize alias recoveryStefan Weinhuber2008-03-051-4/+2
| | | | | | | | | | | | | When a request fails that was started on an alias device then the first recovery step is to retry it on the base device. If the recovery request fails again with the same symptoms, the next step should not be a simple retry, but should be a proper recovery based on sense data, etc. To do so, the dasd recovery functions need to recognize the alias recovery step in the erp chain by comparing the start devices. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Build fix for drivers/s390/char/defkeymap.cTony Breeds2008-03-041-1/+1
| | | | | | | | | | | | | | | Commit 5ce2087ed0eb424e0889bdc9102727f65d2ecdde (Fix default compose table initialization) left a trailing quote. CC drivers/s390/char/defkeymap.o drivers/s390/char/defkeymap.c:155: error: missing terminating ' character drivers/s390/char/defkeymap.c:156: error: syntax error before ';' token make[3]: *** [drivers/s390/char/defkeymap.o] Error 1 Fix that. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix default compose table initializationSamuel Thibault2008-03-031-2/+2
| | | | | | | | | Oddly enough, unsigned int c = '\300'; puts a "negative" value in c, not 0300... This fixes the default unicode compose table by using integers instead of character constants. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* claw: make use of DIV_ROUND_UPJulia Lawall2008-02-241-21/+18
| | | | | | | | The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [S390] qdio: FCP/SCSI write I/O stagnates on LPARUrsula Braun2008-02-191-3/+0
| | | | | | | | | If running on LPAR, qdio might overlook an incoming buffer in certain scenarios. The patch makes sure that incoming buffers are detected immediately in all situations. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dcss: Fix Unlikely(x) != yRoel Kluin2008-02-191-1/+1
| | | | | | | | | | | Fix Unlikely(x) != y Cc: Gerald Schaefer <geraldsc@de.ibm.com> Cc: Stefan Weinhuber <wein@de.ibm.com> Cc: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Roel Kluin <12o3l@tiscali.nl> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: clean up send/receive naming schemePeter Oberparleiter2008-02-196-13/+15
| | | | | | | | | Make state change events adjust the correct mask by cleaning up naming inconsistencies. Also remove chance for lockup by removing unnecessary mask related check before reading events. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: fix qdio_activate timeout handling.Heiko Carstens2008-02-192-9/+3
| | | | | | | | | | | | | | | | | | | | | 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] dasd: fix locking in __dasd_device_process_final_queueStefan Weinhuber2008-02-191-6/+6
| | | | | | | | | | | | | After setting the status of the cqr and releasing the lock for the block cqr queue, we call the cqr callback function, which will usually just trigger the dasd_block_tasklet. But when the tasklet is already running the cqr might be processed before we invoke the callback function. In rare cases the callback pointer may already be invalid by the time we want to call it, which will result in a panic. Solution: Call the callback function first and then release the lock. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Do timed recovery on workqueue.Cornelia Huck2008-02-191-1/+12
| | | | | | | | We can't do our recovery in softirq context, so we schedule it from our timer function. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Remember to initialize recovery_lock.Cornelia Huck2008-02-191-1/+1
| | | | | Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* claw/lcs/netiucv: check s390dbf level before sprintsPeter Tiedemann2008-02-113-14/+41
| | | | | | | | | additional check of s390dbf level results in better performance if the default low debugging level is active. Signed-off-by: Peter Tiedemann <ptiedem@de.ibm.com> Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* lcs: avoid/reduce unused s390dbf debug areas.Peter Tiedemann2008-02-111-1/+1
| | | | | | | | | Since lcs makes use of 1 debug area only, the number of debug areas is reduced, while the number of pages per area is increased. Signed-off-by: Peter Tiedemann <ptiedem@de.ibm.com> Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* netiucv: change name of nop functionUrsula Braun2008-02-111-3/+3
| | | | | | | | | | Dummy NOP actions for fsm-statemachines have to be defined separately for every using module of fsm-statemachines. Thus the generic name fsm_action_nop is replaced by module specific name netiucv_action_nop. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* netiucv: Remember to set driver->owner.Cornelia Huck2008-02-111-0/+1
| | | | | | Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* claw: removal of volatile variablesUrsula Braun2008-02-111-2/+0
| | | | | | | | Volatile variables queme_switch and pk_delay are not used anyway. They are just a left over from an unused timer based packing logic. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [S390] sclp_vt220: Fix vt220 initializationChristian Borntraeger2008-02-091-13/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are two problems in the vt220 intialization: o Currently the vt220 console looses early printk events until the the vt220 tty is registered. o console should work if tty_register fails sclp_vt220_con_init calls __sclp_vt220_init and register_console. It does not register the driver with the sclp core code via sclp_register. That results in an sclp_send_mask=0. Therefore, __sclp_vt220_emit will reject buffers with EIO. Unfortunately register_console will cause the printk buffer to be sent to the console and, therefore, every early message gets dropped. The sclp_send_mask is set later during boot, when sclp_vt220_tty_init calls sclp_register. The solution is to move the sclp_register call from sclp_vt220_tty_init to __sclp_vt220_init. This makes sure that the console is properly registered with the sclp subsystem before the first log buffer messages are passed to the vt220 console. We also adopt the cleanup on error to keep the console alive if tty_register fails. Thanks to Peter Oberparleiter and Heiko Carstens for review and ideas for improvement. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: avoid hang when establishing qdio queuesUrsula Braun2008-02-091-10/+8
| | | | | | | | | | | | | If qdio establish runs in parallel with a channel error, ccw_device_start_timeout may not trigger the qdio_timeout_handler. In this case neither QDIO_IRQ_STATE_ESTABLISHED nor QDIO_IRQ_STATE_ERR is reached and the following wait_event hangs forever. Solution: do not make use of the timeout option with ccw_device_start, but add a timeout to the following wait_event. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] zcrypt: Do not start ap poll thread per defaultFelix Beck2008-02-091-2/+2
| | | | | | | | Do not start ap poll thread per default to increase perfomance with z/VM. Signed-off-by: Felix Beck <felix.beck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* calibrate_delay() must be __cpuinitAdrian Bunk2008-02-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | calibrate_delay() must be __cpuinit, not __{dev,}init. I've verified that this is correct for all users. While doing the latter, I also did the following cleanups: - remove pointless additional prototypes in C files - ensure all users #include <linux/delay.h> This fixes the following section mismatches with CONFIG_HOTPLUG=n, CONFIG_HOTPLUG_CPU=y: WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder') WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map') Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Christian Zankel <chris@zankel.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [S390] dcss: Initialize workqueue before using it.Heiko Carstens2008-02-051-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case a dcss segment cannot be loaded blk_cleanup_queue will be called before blk_queue_make_request, leaving the struct work unplug_work of the request queue uninitialized before it is used. That leads also to the lockdep message below. To avoid that call blk_queue_make_request right after the request_queue has been allocated. This makes sure that the struct work is always initialized before it is used. INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 2 Not tainted 2.6.24 #6 Process swapper (pid: 1, task: 000000000f854038, ksp: 000000000f85f980) 040000000f85f860 000000000f85f880 0000000000000002 0000000000000000 000000000f85f920 000000000f85f898 000000000f85f898 000000000001622e 0000000000000000 000000000f85f980 0000000000000000 0000000000000000 000000000f85f880 000000000000000c 000000000f85f880 000000000f85f8f0 0000000000342908 000000000001622e 000000000f85f880 000000000f85f8d0 Call Trace: ([<000000000001619e>] show_trace+0xda/0x104) [<0000000000016288>] show_stack+0xc0/0xf8 [<00000000000163d0>] dump_stack+0xb0/0xc0 [<000000000006e4ea>] __lock_acquire+0x47e/0x1160 [<000000000006f27c>] lock_acquire+0xb0/0xd8 [<000000000005a522>] __cancel_work_timer+0x9e/0x240 [<000000000005a72e>] cancel_work_sync+0x2a/0x3c [<0000000000165c46>] kblockd_flush_work+0x26/0x34 [<0000000000169034>] blk_sync_queue+0x38/0x48 [<0000000000169080>] blk_release_queue+0x3c/0xa8 [<000000000017bce8>] kobject_cleanup+0x58/0xac [<000000000017bd66>] kobject_release+0x2a/0x38 [<000000000017d28e>] kref_put+0x6e/0x94 [<000000000017bc80>] kobject_put+0x38/0x48 [<00000000001653be>] blk_put_queue+0x2a/0x38 [<0000000000168fee>] blk_cleanup_queue+0x82/0x90 [<0000000000213e7e>] dcssblk_add_store+0x34e/0x700 [<00000000005243b8>] dcssblk_init+0x1a0/0x308 [<000000000050a3c2>] kernel_init+0x1b2/0x3a4 [<000000000001ac82>] kernel_thread_starter+0x6/0xc [<000000000001ac7c>] kernel_thread_starter+0x0/0xc INFO: lockdep is turned off. Cc: Gerald Schaefer <geraldsc@de.ibm.com> Cc: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp_tty/sclp_vt220: Fix scheduling while atomicChristian Borntraeger2008-02-052-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Under load the following bug message appeared while using sysrq-t: BUG: scheduling while atomic: bash/3662/0x00000004 0000000000105b74 000000003ba17740 0000000000000002 0000000000000000 000000003ba177e0 000000003ba17758 000000003ba17758 0000000000105bfe 0000000000817ba8 000000003f2a5350 0000000000000000 0000000000000000 000000003ba17740 000000000000000c 000000003ba17740 000000003ba177b0 0000000000568630 0000000000105bfe 000000003ba17740 000000003ba17790 Call Trace: ([<0000000000105b74>] show_trace+0x13c/0x158) [<0000000000105c58>] show_stack+0xc8/0xfc [<0000000000105cbc>] dump_stack+0x30/0x40 [<000000000012a0c8>] __schedule_bug+0x84/0x94 [<000000000056234e>] schedule+0x5ea/0x970 [<0000000000477cd2>] __sclp_vt220_write+0x1f6/0x3ec [<0000000000477f00>] sclp_vt220_con_write+0x38/0x48 [<0000000000130b4a>] __call_console_drivers+0xbe/0xd8 [<0000000000130bf0>] _call_console_drivers+0x8c/0xd0 [<0000000000130eea>] release_console_sem+0x1a6/0x2fc [<0000000000131786>] vprintk+0x262/0x480 [<00000000001319fa>] printk+0x56/0x68 [<0000000000125aaa>] print_cfs_rq+0x45e/0x4a4 [<000000000012614e>] sched_debug_show+0x65e/0xee8 [<000000000012a8fc>] show_state_filter+0x1cc/0x1f0 [<000000000044d39c>] sysrq_handle_showstate+0x2c/0x3c [<000000000044d1fe>] __handle_sysrq+0xae/0x18c [<00000000002001f2>] write_sysrq_trigger+0x8a/0x90 [<00000000001f7862>] proc_reg_write+0x9a/0xc4 [<00000000001a83d4>] vfs_write+0xb8/0x174 [<00000000001a8b88>] sys_write+0x58/0x8c [<0000000000112e7c>] sysc_noemu+0x10/0x16 [<0000020000116f68>] 0x20000116f68 The problem seems to be, that with a full console buffer, release_console_sem disables interrupts with spin_lock_irqsave and then calls the console function without enabling interrupts. __sclp_vt220_write checks for in_interrupt, to decide if it can schedule. It should check for in_atomic instead. The same is true for sclp_tty.c. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: fix panic caused by alias device offlineStefan Weinhuber2008-02-051-1/+1
| | | | | | | | | | | | | | When an alias device is set offline while it is in use this may result in a panic in the cleanup part of the dasd_block_tasklet. The problem here is that there may exist some ccw requests that were originally created for the alias device and transferred to the base device when the alias was set offline. When these request are cleaned up later, the discipline pointer in the alias device may not be valid anymore. To fix this use the base device discipline to find the cleanup function. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: add ifcc handlingStefan Haberland2008-02-052-27/+52
| | | | | | | | | Adding interface control check (ifcc) handling in error recovery. First retry up to 255 times and if all retries fail try an alternate path if possible. Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Add shutdown callback for ccwgroup.Cornelia Huck2008-02-051-0/+12
| | | | | | | This intendeds to make proper shutdown of qeth devices easier. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: Clean up chsc response code handling.Cornelia Huck2008-02-051-92/+55
| | | | | | | | This provides unified return codes for common response codes and also makes the debug feature messages more similar and informational. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: make sense id procedure work with partial hardware responsePeter Oberparleiter2008-02-051-43/+64
| | | | | | | | | | | | | | | In some cases the current sense id procedure trips over incomplete hardware responses. In these cases, checking against the preset value of 0xFFFF is not enough. More critically, the VM DIAG call will always be considered to have provided data after such an incident, even if it was not successful at all. The solution is to always initialize the control unit data before doing a sense id call. Check the condition code before considering the control unit data. And initialize again, before evaluating the VM data. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [SCSI] zfcp: fix sense_buffer access bugFUJITA Tomonori2008-01-301-2/+2
| | | | | | | | | | The commit de25deb18016f66dcdede165d07654559bb332bc changed scsi_cmnd.sense_buffer from a static array to a dynamically allocated buffer. We can't access to sense_buffer in '&cmd->sense_buffer' way. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
* [VLAN]: Turn VLAN_DEV_INFO into inline functionPatrick McHardy2008-01-291-2/+2
| | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETNS]: Add netns parameter to inet_(dev_)add_type.Eric W. Biederman2008-01-291-1/+1
| | | | | | | | | | | | | | | The patch extends the inet_addr_type and inet_dev_addr_type with the network namespace pointer. That allows to access the different tables relatively to the network namespace. The modification of the signature function is reported in all the callers of the inet_addr_type using the pointer to the well known init_net. Acked-by: Benjamin Thery <benjamin.thery@bull.net> Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* blk_end_request: changing s390 (take 4)Kiyoshi Ueda2008-01-282-15/+15
| | | | | | | | | | | | | | | | This patch converts s390 to use blk_end_request interfaces. Related 'uptodate' arguments are converted to 'error'. As a result, the interfaces of internal functions below are changed: o dasd_end_request o tapeblock_end_request Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* [S390] usage of s390dbf: shrink number of debug areas to use.Peter Tiedemann2008-01-262-5/+5
| | | | Signed-off-by: Peter Tiedemann <ptiedem@de.ibm.com>
* [S390] constify function pointer tables.Jan Engelhardt2008-01-266-7/+7
| | | | | Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: fix loop in request expiration handlingStefan Haberland2008-01-261-1/+2
| | | | | | | | Add time to the 'expires' value to avoid a loop caused by the cqr termination function Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: add hyper PAV support to DASD device driver, part 1Stefan Weinhuber2008-01-2618-1720/+3117
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Parallel access volumes (PAV) is a storage server feature, that allows to start multiple channel programs on the same DASD in parallel. It defines alias devices which can be used as alternative paths to the same disk. With the old base PAV support we only needed rudimentary functionality in the DASD device driver. As the mapping between base and alias devices was static, we just had to export an identifier (uid) and could leave the combining of devices to external layers like a device mapper multipath. Now hyper PAV removes the requirement to dedicate alias devices to specific base devices. Instead each alias devices can be combined with multiple base device on a per request basis. This requires full support by the DASD device driver as now each channel program itself has to identify the target base device. The changes to the dasd device driver and the ECKD discipline are: - Separate subchannel device representation (dasd_device) from block device representation (dasd_block). Only base devices are block devices. - Gather information about base and alias devices and possible combinations. - For each request decide which dasd_device should be used (base or alias) and build specific channel program. - Support summary unit checks, which allow the storage server to upgrade / downgrade between base and hyper PAV at runtime (support is mandatory). Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] drivers/s390/: Spelling fixesJoe Perches2008-01-266-6/+6
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] use LIST_HEAD instead of LIST_HEAD_INITDenis Cheng2008-01-265-7/+6
| | | | | | | | | single list_head variable initialized with LIST_HEAD_INIT could almost always can be replaced with LIST_HEAD declaration, this shrinks the code and looks better. Signed-off-by: Denis Cheng <crquan@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] drivers/s390: Add missing "space"Joe Perches2008-01-266-10/+10
| | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: fix return value of dasd_generic_probe()Stefan Haberland2008-01-261-3/+4
| | | | | | | | Using the return value of ccw_device_set_online as return value for dasd_generic_probe() causes the DASD to fail setting online Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Get rid of additional_cpus kernel parameter.Heiko Carstens2008-01-261-44/+2
| | | | | | | | | It caused only a lot of confusion. From now on cpu hotplug of up to NR_CPUS will work by default. If somebody wants to limit that then the possible_cpus parameter can be used. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: convert channel path configure code to use sync interface.Heiko Carstens2008-01-263-202/+123
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Standby cpu activation/deactivation.Heiko Carstens2008-01-264-119/+322
| | | | | | | | | | | | | | | | | | | | | | | Add a new interface so that cpus can be put into standby state and configured state. Only offline cpus can be put into standby state or configured state. For that the new percpu sysfs attribute "configure" must be used. To put a cpu in standby state a "0" must be written to the attribute. In order to switch it into configured state a "1" must be written to the attribute. Only cpus in configured state can be brought online. In addition this patch introduces a static mapping of physical to logical cpus. As a result only the sysfs directories of present cpus will be created. To scan for new cpus the new sysfs attribute "rescan" must be used. Writing to /sys/devices/system/cpu/rescan will trigger a rescan of cpus and will create directories for new cpus. On IPL only configured cpus will be used. And on reboot/shutdown all cpus will remain in their current state (configured/standby). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] sclp: sysfs interface for SCLP cpiMichael Ernst2008-01-264-231/+432
| | | | | Signed-off-by: Michael Ernst <mernst@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] qdio: Remove double checked value.Sebastian Ott2008-01-261-2/+1
| | | | | Signed-off-by: Sebastian Ott <sebott@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] cio: introduce timed recovery procedurePeter Oberparleiter2008-01-263-0/+67
| | | | | | | | | Add a timed recovery procedure to reactivate ccw devices in cases where HW/VM events are not sufficient to allow for proper recovery of reappearing channel paths. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@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>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 14:06:38 +0100