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path: root/drivers/misc/sgi-gru
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2009-11-05sgi-gru: decrapfiy options_write() functionLinus Torvalds
Not a single line of actual code in the function was really fundamentally correct. Problems ranged from lack of proper range checking, to removing the last character written (which admittedly is usually '\n'), to not accepting hex numbers even though the 'show' routine would show the data in that format. This tries to do better. Acked-by: Michael Buesch <mb@bu3sch.de> Tested-and-acked-by: Jack Steiner <steiner@sgi.com> Cc: stable@kernel.org Cc: Jiri Kosina <jkosina@suse.cz> Cc: Michael Gilbert <michael.s.gilbert@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-10-01const: constify remaining file_operationsAlexey Dobriyan
[akpm@linux-foundation.org: fix KVM] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-27const: mark struct vm_struct_operationsAlexey Dobriyan
* mark struct vm_area_struct::vm_ops as const * mark vm_ops in AGP code But leave TTM code alone, something is fishy there with global vm_ops being used. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-24gru: allocation may fail in quicktest1()Roel Kluin
The allocation may fail. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Acked-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-24gru: use proc_create()Alexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-12headers: smp_lock.h reduxAlexey Dobriyan
* Remove smp_lock.h from files which don't need it (including some headers!) * Add smp_lock.h to files which do need it * Make smp_lock.h include conditional in hardirq.h It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT This will make hardirq.h inclusion cheaper for every PREEMPT=n config (which includes allmodconfig/allyesconfig, BTW) Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: copyright fixesJack Steiner
Fix the copyright statements in a couple of GRU files. No functional changes are being made. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: remove references to the obsolete global status handleJack Steiner
Delete references to the SGI GRU GSH hardware resources. These GRU resources have been deleted from the hardware. (These resources have never benn used, anyway). Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: fixes to grudump utilityJack Steiner
Minor fixes to the SGI GRU grudump facility: - fix address where user data is written - add gru number to data passed to user - indicate if context is locked Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: fix potential use-after-free when purging GRU tlbsJack Steiner
Fix potential SGI GRU bug that could cause a use-after-free. If one thread in a task is flushing the GRU and another thread destroys the GRU context, there is the potential to access a table after it has been freed. Copy the gms pointer to a local variable before unlocking the gts table. Note that no refcnt is needed for the gms - the reference is held indirectly by the task's mm_struct. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: add user request to specify gru sliceJack Steiner
Add a user request to specify the gru instruction slice parameter for user contexts. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: generic infrastructure for context optionsJack Steiner
Change the user GRU request for specifying the "task_slice" option to use a generic infrastructure that can be expanded in the future to include additional context options. No new capabilities are added with this patch. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: cleanup gru inline functionsJack Steiner
Cleanup of GRU inline functions to eliminate unnecessary inline code. Update function descriptions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: delete user request for fetching chiplet statusJack Steiner
Delete the user request for fetching the status of a GRU chiplet. This request has been made obsolete by other changes. Note: this is not a change to a user API - there are no compatibility issues with this change. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: collect per-context user statisticsJack Steiner
Collect GRU statistics for each user GRU context. Statistics are kept for TLB misses & content resource contention. Add user request for retrieving the statistics. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: fix automatic retry of gru instruction failuresJack Steiner
Fix bug in automatic retry of GRU instruction failures. CBR substatus (message queue failure) was being checked incorrectly. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: add user request to explicitly unload a gru contextJack Steiner
Add user function to explicitly unload GRU kernel contexts from the GRU. Only contexts that are not in-use will be unloaded. This function is primarily for testing. It is not expected that this will be used in normal production systems. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: fix cache coherency issues with instruction retryJack Steiner
Fix two problems related to GRU instruction failures. Cache coherency is not maintained for CBEs except when loading or unloading contexts. When reading a CBE to extract error information, the CBE must first be flushed from the cache. The function that reads kerrnel CBEs was reading the wrong CBE. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: update to rev 0.9 of gru specJack Steiner
Update GRU driver to the latest version of the GRU spec. This consists of minor updates: - changes & additions to error status bits - new restriction on handling of TLB misses while in FMM mode - new field (not used by software) in TFH Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: update gru kernel self testsJack Steiner
Change the kernel self tests that can be optionally executed on GRU initialization. This is primarily for testing. Eliminate the BUG statements on failure and return bad status. Add ioctl interface to execute the tests on demand. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: support for asynchronous gru instructionsJack Steiner
Add support for asynchronous GRU instructions. Currently, asynchronous instructions are supported only for GRU instructions issued by the kernel. [akpm@linux-foundation.org: build fix] Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: support instruction completion interruptsJack Steiner
Add support for interrupts generated by GRU instruction completion. Previously, the only interrupts were for TLB misses. The hardware also supports interrupts on instruction completion. This will be supported for instructions issued by the kernel. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: check context state on reloadJack Steiner
Check whether the gru state being loaded into a gru is from a new context or a previously unloaded context. If new, simply zero out the hardware context; if unloaded and valid, reload the old state. This change is primarily for reloading kernel contexts where the previous is not required to be saved. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: fix handling of mesq failuresJack Steiner
Fix endcase in handling GRU message queue failures due to NACKs of PUT requests. Must ensure that the "present" bits are cleared before resending the message. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: support contexts with zero dsrs or cbrsJack Steiner
Support alocation of GRU contexts that contain zero DSR or CBR resources. Some instructions do not require DSR resources. Contexts without CBR resources are useful for diagnostics. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: change resource assignment for kernel threadsJack Steiner
Change the way GRU resources are assigned for kernel threads. GRU contexts for kernel threads are now allocated on demand and can be stolen by user processes when idle. This allows MPI jobs to use ALL of the GRU resources when the kernel is not using them. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: support cch_allocate for kernel threadsJack Steiner
Change the interface to cch_allocate so that it can be used to allocate GRU contexts for kernel threads. Kernel threads use the GRU in unmapped mode and do not require ASIDs for the GRU TLB. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: change context load and unloadJack Steiner
Remove "static" from the functions for loading/unloading GRU contexts. These functions will be called from other GRU files. Fix bug in unlocking gru context. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: dynamic allocation of kernel contextsJack Steiner
Change the interface to gru_alloc_gts() so that it can be used to allocate GRU contexts for kernel threads. Kernel threads do not have vdata structures for the GRU contexts. The GRU resource count are now passed explicitly instead of inside the vdata structure. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: dump chiplet stateJack Steiner
Add support for dumpping the state of an entire GRU chiplet. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-18gru: bug fixes for GRU exception handlingJack Steiner
Bug fixes for GRU exception handling. Additional fields from the CBR must be returned to the user to allow the user to correctly diagnose GRU exceptions. Handle endcase in TFH TLB miss handling. Verify that TFH actually indicates a pending exception. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-16page allocator: do not check NUMA node ID when the caller knows the node is ↵Mel Gorman
valid Callers of alloc_pages_node() can optionally specify -1 as a node to mean "allocate from the current node". However, a number of the callers in fast paths know for a fact their node is valid. To avoid a comparison and branch, this patch adds alloc_pages_exact_node() that only checks the nid with VM_BUG_ON(). Callers that know their node is valid are then converted. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Paul Mundt <lethal@linux-sh.org> [for the SLOB NUMA bits] Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-21sgi-xp/sgi-gru: allow modules to load on non-uv systemsRobin Holt
For an upcoming distro release, we need to have the xp kernel module loadable even when not on UV equipment. The xpc module will not load. This will allow one set of modules dependent upon xp to work on either UV or non-UV equipment. Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: support multiple pagesizes in GRUJack Steiner
Add multiple pagesize support to the GRU driver. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: fix bugs related to module unload of the GRU driverJack Steiner
Fix bugs related to module unload of the GRU driver. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: macro for scanning all gru chipletsJack Steiner
Add macro for scanning all active GRU chiplets. Maximum chiplet id is saved during GRU initialization. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: add support to the GRU driver for message queue interruptsJack Steiner
Add support to the GRU driver for message queue interrupts. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: restructure the GRU vtop functionsJack Steiner
Restructure the GRU vtop functions in preparation for future changes. This patch simply moves code around & does not change the algorithm. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: aSID (context management) bug fixesJack Steiner
This patch fixes bugs related to ASID (context id) management in the GRU driver. These changes are all internal to the SGI GRU driver and have no effect on the base kernel. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: add support for a user to explicitly unload a GRU contextJack Steiner
Add support for a user to explicitly unload a GRU context. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: add statistics to the GRU context management functionsJack Steiner
Add statistics to the GRU context management functions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: change GRU CCH commands from inline functions to outofline functionsJack Steiner
Change the GRU instructions that manage contexts from inline functions to out-of-line functions. This simplifies adding statistics & error checking to these functions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: improvements to GRU debug messages & statisticsJack Steiner
Improvements to GRU debug messages & statistics. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-02sgi-gru: misc GRU cleanupJack Steiner
Misc trivial GRU drivers fixes: - fix long lines - eliminate extra whitespace - eliminate compiler warning - better validation of invalidate user parameters - bug fix for GRU TLB flush (not the cpu TLB flush) These changes are all internal to the SGI GRU driver and have no effect on the base kernel. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-02-11SGI IA64 UV: fix ia64 build error in the linux-next treeDean Nelson
Fix the ia64 build error that occurs in the linux-next tree by introducing an ia64 version of uv.h. Additionally, clean up the usage of is_uv_system(). Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-21x86: uv cleanup, build fix #2Ingo Molnar
Fix more build-failure fallout from the UV cleanup - the UV drivers were not updated to include <asm/uv/uv.h>. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-06SGI: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers
CC: Jack Steiner <steiner@sgi.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-12-16Merge commit 'v2.6.28-rc8' into x86/uvIngo Molnar
2008-12-09[IA64] Fix GRU compile error w/o CONFIG_HUGETLB_PAGEJack Steiner
Eliminate compile error when compiling without CONFIG_HUGETLB_PAGE. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-12-02sgi-gru: call fs_initcall() if statically linkedDean Nelson
If xpc.ko and gru.ko are both statically linked into the kernel, then xpc_init() can get called before gru_init() and make a call to one of the gru's exported functions before the gru has initialized itself. The end result is a NULL dereference. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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