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* s390/qdio: remove unused variableSebastian Ott2013-07-161-2/+2
| | | | | | | Fix a "set but not used" warning found via make W=1. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/airq: simplify adapter interrupt codeMartin Schwidefsky2013-06-262-128/+72
| | | | | | | | | | | | | There are three users of adapter interrupts: AP, QDIO and PCI. Each registers a single adapter interrupt with independent ISCs. Define a "struct airq" with the interrupt handler, a pointer and a mask for the local summary indicator and the ISC for the adapter interrupt source. Convert the indicator array with its fixed number of adapter interrupt sources per ISE to an array of hlists. This removes the limitation to 32 adapter interrupts per ISC and allows for arbitrary memory locations for the local summary indicator. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/irq: store interrupt information in pt_regsMartin Schwidefsky2013-06-261-40/+28
| | | | | | | | | | Copy the interrupt parameters from the lowcore to the pt_regs structure in entry[64].S and reduce the arguments of the low level interrupt handler to the pt_regs pointer only. In addition move the test-pending-interrupt loop from do_IRQ to entry[64].S to make sure that interrupt information is always delivered via pt_regs. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/chsc: Use snprintf instead of sprintfMichael Holzheu2013-06-261-6/+6
| | | | | Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/qdio: cleanup chsc SADC usageSebastian Ott2013-06-264-54/+73
| | | | | | | | | | 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 Ott2013-06-264-43/+58
| | | | | | | | | | 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/cio: Introduce on-close CHSC IOCTLsMichael Holzheu2013-06-261-0/+94
| | | | | | | | | Introduce two new ioctls CHSC_ON_CLOSE_SET and CHSC_ON_CLOSE_REMOVE that allow to add and remove one CHSC that is unconditionally executed when the CHSC device node is closed. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: Make /dev/chsc a single-open deviceMichael Holzheu2013-06-261-1/+19
| | | | | | | | | In order to allow serialization of dynamic I/O with this patch the /dev/chsc character device can only be accessed by one single opener. Any subsequent open calls are rejected with EBUSY. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: Introduce generic synchronous CHSC IOCTLMichael Holzheu2013-06-262-7/+35
| | | | | | | | This patch adds a new ioctl CHSC_START_SYNC that allows to execute any synchronous CHSC that is provided by user space. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/qdio: remove unused functionSebastian Ott2013-06-261-44/+0
| | | | | | | | Remove the unused function qdio_trace_aob. Acked-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/cio: add channel ID sysfs attributePeter Oberparleiter2013-05-152-1/+39
| | | | | | | | | | Add new attributes "chid" and "chid_external" to the channel-path sysfs directory. These attributes contain information related to the channel-ID of the channel-path. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: add condev keyword to cio_ignoreSebastian Ott2013-05-021-0/+7
| | | | | | | | | Provide a 'condev' keyword to cio_ignore to (un)ignore the CCW console device. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: add ipldev keyword to cio_ignoreSebastian Ott2013-05-021-2/+19
| | | | | | | | | Provide an 'ipldev' keyword to cio_ignore to (un)ignore the CCW or FCP based boot device. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-05-021-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull VFS updates from Al Viro, Misc cleanups all over the place, mainly wrt /proc interfaces (switch create_proc_entry to proc_create(), get rid of the deprecated create_proc_read_entry() in favor of using proc_create_data() and seq_file etc). 7kloc removed. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits) don't bother with deferred freeing of fdtables proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h proc: Make the PROC_I() and PDE() macros internal to procfs proc: Supply a function to remove a proc entry by PDE take cgroup_open() and cpuset_open() to fs/proc/base.c ppc: Clean up scanlog ppc: Clean up rtas_flash driver somewhat hostap: proc: Use remove_proc_subtree() drm: proc: Use remove_proc_subtree() drm: proc: Use minor->index to label things, not PDE->name drm: Constify drm_proc_list[] zoran: Don't print proc_dir_entry data in debug reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show() proc: Supply an accessor for getting the data from a PDE's parent airo: Use remove_proc_subtree() rtl8192u: Don't need to save device proc dir PDE rtl8187se: Use a dir under /proc/net/r8180/ proc: Add proc_mkdir_data() proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h} proc: Move PDE_NET() to fs/proc/proc_net.c ...
| * constify a bunch of struct file_operations instancesAl Viro2013-04-091-1/+1
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | s390/cio: fix irq statisticsSebastian Ott2013-04-261-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we fetch an interrupt on the CCW console using tsch (via ccw_device_wait_idle formerly known as wait_cons_dev) we increment the irq count for the affected interruption class but it is not accounted as an IO interrupt. This is broken since commit b603d258a43b4e7339660bdd3b5c25eacd603e54 "s390: remove superfluous tpi from wait_cons_dev" Fix it so that the sum of the individual interrupts per class matches the number of IO interrupts again. Reported-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/css: move subchannel lock allocationSebastian Ott2013-04-173-34/+32
| | | | | | | | | | | | | | | | | | | | | | | | cio_validate_subchannel is used to do some basic checks to find out if it's worth to further investigate a subchannel. Move the allocation and initialization of the subchannels locks to css_alloc_subchannel. Clean up the functions involved while at it. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: fix early init counter usageSebastian Ott2013-04-172-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Via ccw_device_init_count we keep track of how many devices are in asynchronous device recognition/initialization. For early devices this variable was not only used prior to its initialization but used incorrectly (incremented but never decremented). Fix this by using static initialization for this variable (and friends), make them visible to device.c only, and decrement the counter after recognition of early devices is finished. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/css: remove unused function definitionsSebastian Ott2013-04-172-4/+2
| | | | | | | | | | | | | | | | Make css_probe_device static and remove an unimplemented prototype. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/css: introduce cio_register_early_subchannelsSebastian Ott2013-04-174-23/+24
| | | | | | | | | | | | | | | | | | | | | | Use cio_register_early_subchannels to register early subchannels which are already in use. Call this function before we do the actual subchannel scanning loop. This helps us to get rid of some more special cases regarding the console subchannel. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: get rid of static console deviceSebastian Ott2013-04-171-43/+30
| | | | | | | | | | | | | | | | | | | | | | Remove the static console ccw device (and friends) and use dynamic allocation for these structures. With this change the console device is treated (mostly) like any other ccw device and we can remove some special cases. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: get rid of static console subchannelSebastian Ott2013-04-175-108/+56
| | | | | | | | | | | | | | | | | | | | | | Remove the static console subchannel (and friends) and use dynamic allocation for these structures. With this change the console subchanel is treated (mostly) like any other subchannel and we can remove some special cases. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: split subchannel registrationSebastian Ott2013-04-171-19/+18
| | | | | | | | | | | | | | | | | | | | | | | | Split the subchannel registration in device_initialize and device_add and move the initialization part inside the allocation function. With this change we can use refcounting during the complete lifespan of a subchannel which is important for devices where we do the actually registration at a later time. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: ccw_device_force_console don't use static variableSebastian Ott2013-04-171-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | force_console is used to wake up the CCW based console device to print a panic message in case something goes wrong in a suspend or resume cycle. Stop using the static console_subchannel and add a parameter to this function to specify which ccw device we have to wake up. Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: wait_cons_dev don't use static variableSebastian Ott2013-04-173-20/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | wait_cons_dev is used to busy wait for an interrupt on the console ccw device. Stop using the static console_subchannel and add a parameter to this function to specify on which ccw device/subchannel we have to do the polling. While at it rename the function to ccw_device_wait_idle and move it to device.c Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: Use BITS_TO_LONGS() instead of __BITOPS_WORDS()Akinobu Mita2013-04-171-1/+1
| | | | | | | | | | | | | | | | | | Use BITS_TO_LONGS() instead of __BITOPS_WORDS() that is considered to be private macro in asm/bitops.h for s390. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: make use of newly added format 1 channel-path dataPeter Oberparleiter2013-04-171-8/+14
| | | | | | | | | | | | | | | | | | | | Make use of the stored copy of format 1 channel-path data instead of querying the information every time the corresponding function is called. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: collect format 1 channel-path description dataPeter Oberparleiter2013-04-174-9/+31
|/ | | | | | | | | Collect format 1 channel-path description data for each CHPID and update the information in one place. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/scm: process availabilitySebastian Ott2013-03-073-0/+35
| | | | | | | | | | Let the bus code process scm availability information and notify scm device drivers about the new state. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/scm_drv: extend notify callbackSebastian Ott2013-03-071-1/+1
| | | | | | | | | | Extend the notify callback of scm_driver by an event parameter to allow to distinguish between different notifications. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* qdio: remove unused parametersStefan Raspl2013-02-283-7/+7
| | | | | | | Remove unused function parameters. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-02-271-2/+2
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
| * new helper: file_inode(file)Al Viro2013-02-231-2/+2
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | s390/time: rename tod clock access functionsHeiko Carstens2013-02-145-13/+13
| | | | | | | | | | | | | | | | Fix name clash with some common code device drivers and add "tod" to all tod clock access function names. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/scm: use inline dummy functionsSebastian Ott2013-02-141-1/+1
| | | | | | | | | | | | | | | | Convert the defines for the !CONFIG_SCM* stuff to static inline functions. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: handle unknown pgroup stateSebastian Ott2013-02-141-3/+61
| | | | | | | | | | | | | | | | | | | | | | When an attempt to query or modify the grouping state of a channel path fails due to a timeout, we cannot be sure about its state. To get back to a defined state, disband the whole path group and try again while excluding the offending path. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: export vpm via sysfsSebastian Ott2013-02-141-0/+10
| | | | | | | | | | | | | | | | | | | | Add new attribute "vpm" to the subchannel sysfs directory of I/O subchannels. This attribute contains a path mask indicating which channel paths were successfully verified to be usable for I/O. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: skip broken pathsSebastian Ott2013-02-141-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Omit known to be broken paths (those set in path_noirq_mask) for the sense/set PGID and nop IO commands. Note: path_noirq_mask will be reset in ccw_device_verify_start (the paths could be healthy again). However if we restart a path verification via verify_start this mask will not be reset (there is no need to let the wait for an interrupt time out again - plus we do not want to loop once we deal with the paths in unknown path group state). Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/cio: dont abort verification after missing irqSebastian Ott2013-02-142-10/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do not abort path verification when waiting for an interrupt timed out. Use path_noirq_mask to keep track of the paths used for this (also maintain a path_notoper_mask for debugging purposes). If the timeout happend to be during an operation where we query or alter the state of path groups set the pgid_unknown flag. With this change we allow usage of devices which have such ill-behaved paths (if at least one path is operational). Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390/chsc: cleanup SEI helper functionsSebastian Ott2013-02-141-36/+32
|/ | | | | | | | | Cleanup the functions used to call SEI. Also provide !CONFIG_PCI dummys for pci error handling. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/chsc: fix SEI usageSebastian Ott2013-01-161-19/+12
| | | | | | | | | | | | | | | | | | | | cbc0dd1 "s390/pci: CHSC PCI support for error and availability events" introduced a new SEI notification type as part of pci support. The way SEI was called with nt2 and nt0 consecutive broke the nt0 stuff used for channel subsystem notifications. The reason why this was broken with the mentioned patch is that you cannot selectively disable type 0 notifications (so even when asked for type 2 only, type 0 could be presented). The way to do it is to tell SEI which types of notification you can process and -this is the important part- look at the SEI result which notification type you actually received. Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Tested-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/irq: remove split irq fields from /proc/statHeiko Carstens2013-01-086-16/+15
| | | | | | | | | | | | | | | | | | | | | Now that irq sum accounting for /proc/stat's "intr" line works again we have the oddity that the sum field (first field) contains only the sum of the second (external irqs) and third field (I/O interrupts). The reason for that is that these two fields are already sums of all other fields. So if we would sum up everything we would count every interrupt twice. This is broken since the split interrupt accounting was merged two years ago: 052ff461c8427629aee887ccc27478fc7373237c "[S390] irq: have detailed statistics for interrupt types". To fix this remove the split interrupt fields from /proc/stat's "intr" line again and only have them in /proc/interrupts. This restores the old behaviour, seems to be the only sane fix and mimics a behaviour from other architectures where /proc/interrupts also contains more than /proc/stat's "intr" line does. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/irq: enable irq sum accounting for /proc/stat againHeiko Carstens2013-01-081-1/+1
| | | | | | | | | | | | | | | | | | For more than two years, since f2c66cd8eeddedb440f33bc0f5cec1ed7ae376cb "/proc/stat: scalability of irq num per cpu" the output of /proc/stat is broken. The first field in the "intr" line should contain the sum of all interrupts, however since the above mentioned change it is always zero. The reason for that is that a per cpu irq sum variable had been introduced which got incremented when calling kstat_incr_irqs_this_cpu(). However on s390 we directly incremented only the per cpu per irq counter by accessing the array element via kstat_cpu(smp_processor_id()).irqs[...]. So fix this and use the kstat_incr_irqs_this_cpu() wrapper which increments both: the per cpu per irq counter and the per cpu irq sum counter. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/qdio: rename the misleading PCI flag of qdio devicesJan Glauber2012-12-111-1/+1
| | | | | | | | | | | | | | | For each detected qdio device a line like to following is printed: qdio: 0.0.4102 OSA on SC 1045 using AI:1 QEBSM:0 PCI:1 TDD:1 SIGA: W AP The PCI flag is misleading as this stands for "program controlled interrupt". Rename it to PRI "program requested interrupt" which is more accurate and does not interfere with another popular piece of technology. Leave the pci string in the code since changing that would result in a huge patch. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/cio: fix pgid reserved checkSebastian Ott2012-12-031-5/+5
| | | | | | | | | | | | | | | | | | | | | The check to whom a device is reserved is done by checking the path state of the affected channel paths. If it turns out that one path is flagged as reserved by someone else the whole device is marked as such. However the meaning of the RESVD_ELSE bit is that the addressed device is reserved to a different pathgroup (and not reserved to a different LPAR). If we do this test on a path which is currently not a member of the pathgroup we could erroneously mark the device as reserved to someone else. To fix this collect the reserved state for all potential members of the pathgroup and only mark the device as reserved if all of those potential members have the RESVD_ELSE bit set. Cc: stable@vger.kernel.org Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/pci: CHSC PCI support for error and availability eventsJan Glauber2012-11-301-44/+112
| | | | | | | | Add CHSC store-event-information support for PCI (notfication type 2) and report error and availability events to the PCI architecture layer. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/ccwgroup: allow drivers to call set_{on,off}lineSebastian Ott2012-11-231-2/+20
| | | | | | | | Allow drivers to enable/disable ccwgroup devices. Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/ccwgroup: set_online return error when already onlineSebastian Ott2012-11-231-2/+2
| | | | | | | | | | | | Return -EINVAL if set_{on,off}line is called for already {on,off}line devices. Also return -EINVAL for drivers which do not provide a callback for set_{on,off}line. This behaviour is now consistent with the one for ccw devices. Reported-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Acked-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: use ccw_device_get_schidSebastian Ott2012-11-234-24/+1
| | | | | | | | Let the dasd driver and qdio use ccw_device_get_schid and get rid of other similar functions. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: Add a mechanism to get the subchannel id.Cornelia Huck2012-11-231-0/+12
| | | | | | | This will be needed by the new virtio-ccw transport. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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