| 7a32129a42cf167550008b363a017234d0b73f2a |
|
10-Jul-2011 |
Paul Gortmaker <paul.gortmaker@windriver.com> |
drivers/misc: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required.
We will need this to avoid build failures pending a future implicit
module.h presence cleanup.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
|
| 25985edcedea6396277003854657b5f3cb31a628 |
|
31-Mar-2011 |
Lucas De Marchi <lucas.demarchi@profusion.mobi> |
Fix common misspellings
Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
|
| 76148df19cbd5437dc5358408a58c7cc6366ecf4 |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: send cross partition interrupts using the gru
GRU Message queue instructions are used to deliver messages to other SSIs
within the numalink domain. In most cases, a single GRU mesq instruction
will deliver both the message AND an interrupt to notify the other SSI
that a messsage is present. In some cases, however, the interrupt must be
sent explicitly.
To improve resilency, the GRU driver should send these explicit interrupts
using the GRU to write the remote chipset register. Current code sends
the interrupt using a cpu instruction to write the chipset register.
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>
|
| 0cd2b0813aac660f5f7a6574083157a70c152dd5 |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: fix bug in allocation of kernel contexts
Fix a bug in the assignment of GRU contexts used for kernel functions. If
a sleep occurs on the wait for a semaphore, the thread could switch cpus
and allocate resources on the wrong blade.
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>
|
| 1848a710287b33a92c3c5b2f4c3ae201a879eb7e |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: fix bug in exception handling
Fix a GRU driver bug converting a CBR address to the context that contains
the CBR. The conversion is rarely done so performance does not matter.
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>
|
| c550222f64265c9384c45d7f691445386025a82b |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: preload tlb for bcopy instructions
Add anticipatory TLB dropins for GRU TLB misses that occur on BCOPY
instructions that copy large amounts of data.
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>
|
| 563447d7eb04c9b382f90a132be126a21a635647 |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: add additional GRU statistics
Add additional GRU statistics & debug messages.
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>
|
| 67bf04a5c2574e9495f660f418f6df776821d578 |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: fix prefetch and speculation bugs
Fix several bugs related to prefetch, ordering & speculation:
- GRU cch_allocate() instruction causes cacheable memory
to be created. Add a barriers to prevent speculation
from prefetching data before it exists.
- Add memory barriers before cache-flush instructions to ensure
that previously stored data is included in the line flushed to memory.
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>
|
| 33f3648342dc40f8bd6383a5a1a91c22e06f6b77 |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: add test for gru_copy_gpa
Improve existing driver self-tests. Add a new debugging test to the SGI
GRU driver for verifying the global GRU copy function.
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>
|
| 55484c45dbeca2eec7642932ec3f60f8a2d4bdbf |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: allow users to specify gru chiplet 2
Add support to the GRU driver to allow users to specify the blade &
chiplet for allocation of GRU contexts. Add new statistics for context
loading/unloading/retargeting. Also deleted a few GRU stats that were no
longer being unused.
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>
|
| 091f1a10614db89a108cda980425799730d73d8a |
|
16-Dec-2009 |
Jack Steiner <steiner@sgi.com> |
gru: add comments raised in previous code reviews
Add comments from previous code reviews. The comments help explain some
of the more esoteric aspects of the driver.
Move a free() to the other side of an unlock.
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>
|
| 289750d1f1fd4a715baa2a2c6dd0cec2b8317fd7 |
|
16-Dec-2009 |
Robin Holt <holt@sgi.com> |
X86: uv: implement a gru_read_gpa kernel function
The BIOS has decided to store a pointer to the partition reserved page in
a scratch MMR. The GRU is only able to read an MMR using a vload
instruction. The gru_read_gpa() function will implemented.
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>
|
| 9e5f1138d76e45b0ce56314ba0587e5942b55dcc |
|
24-Sep-2009 |
Roel Kluin <roel.kluin@gmail.com> |
gru: allocation may fail in quicktest1()
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>
|
| 405f55712dfe464b3240d7816cc4fe4174831be2 |
|
11-Jul-2009 |
Alexey Dobriyan <adobriyan@gmail.com> |
headers: smp_lock.h redux
* 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>
|
| d6e2fbce0d70c2072a1c478dbd37b34d27129d74 |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: fix automatic retry of gru instruction failures
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>
|
| d5826dd6002f23940458860701ce22fba9df2614 |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: add user request to explicitly unload a gru context
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>
|
| 1a2c09e3b41e334b6651d53b39cfe8ceefbc45f8 |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: fix cache coherency issues with instruction retry
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>
|
| 270952a907220c0331fdaecbb55df892921c5e2d |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: update to rev 0.9 of gru spec
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>
|
| eb5bd5e52a8eafb1ddb42f983d41f97552afa106 |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: update gru kernel self tests
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>
|
| 9120dec47f150636d85b3dba03318ccecd181c79 |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: support for asynchronous gru instructions
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>
|
| 17b49a67a6a59f0e9f3c22e67ddb602410e8e182 |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: fix handling of mesq failures
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>
|
| 836ce679c0b5b5040164171afc33753396864b30 |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: change resource assignment for kernel threads
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>
|
| 6e9100741ca430eeef8022794f8b62a23a5916af |
|
18-Jun-2009 |
Jack Steiner <steiner@sgi.com> |
gru: support cch_allocate for kernel threads
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>
|
| 7b8274e93fbabc7534aa51f95551c30aecdd0066 |
|
03-Apr-2009 |
Jack Steiner <steiner@sgi.com> |
sgi-gru: support multiple pagesizes in GRU
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>
|
| 27ca8a7b2bdfb3e22e67fbd5df58e6b6f0bbcd48 |
|
03-Apr-2009 |
Jack Steiner <steiner@sgi.com> |
sgi-gru: fix bugs related to module unload of the GRU driver
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>
|
| 6f2584f47474d29ce829604bfc8b56c10b352fdb |
|
03-Apr-2009 |
Jack Steiner <steiner@sgi.com> |
sgi-gru: add support to the GRU driver for message queue interrupts
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>
|
| 438846043af39fef286f68b197d42bd75f49898e |
|
03-Apr-2009 |
Jack Steiner <steiner@sgi.com> |
sgi-gru: improvements to GRU debug messages & statistics
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>
|
| fe5bb6b00c3a9374841d651e01694fe4190a677e |
|
03-Apr-2009 |
Jack Steiner <steiner@sgi.com> |
sgi-gru: misc GRU cleanup
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>
|
| 923f7f6970bd448b8e88b9e4be10fd01fc7106a4 |
|
16-Oct-2008 |
Jack Steiner <steiner@sgi.com> |
GRU driver: minor updates
A few minor updates for the GRU driver.
- documentation changes found in code reviews
- changes to #ifdefs to make them recognized by "unifdef"
(used in simulator testing)
- change GRU context load/unload to prefetch data
[akpm@linux-foundation.org: fix typo in comment]
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>
|
| cbf330b94e9c888e9d2b99523037f9be5c4ba795 |
|
16-Oct-2008 |
Julia Lawall <julia@diku.dk> |
drivers/misc: Use DIV_ROUND_UP
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /
(d)) but is perhaps more readable.
An extract of the semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@haskernel@
@@
#include <linux/kernel.h>
@depends on haskernel@
expression n,d;
@@
(
- (n + d - 1) / d
+ DIV_ROUND_UP(n,d)
|
- (n + (d - 1)) / d
+ DIV_ROUND_UP(n,d)
)
@depends on haskernel@
expression n,d;
@@
- DIV_ROUND_UP((n),d)
+ DIV_ROUND_UP(n,d)
@depends on haskernel@
expression n,d;
@@
- DIV_ROUND_UP(n,(d))
+ DIV_ROUND_UP(n,d)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| 9ca8e40c130c906c1060d105e63628410c860261 |
|
30-Jul-2008 |
Jack Steiner <steiner@sgi.com> |
GRU Driver V3: fixes to resolve code review comments
Fixes problems identified in a code review:
- add comment with high level dscription of the GRU
- prepend "gru_" to all global names
- delete unused function
- couple of trivial bug fixes
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| 28bffaf094a6d0992c85e1b01f04c9b0f56c9d62 |
|
30-Jul-2008 |
Jack Steiner <steiner@sgi.com> |
GRU Driver: kernel services provide by driver
This file contains functions for handling services provided to other
kernel modules that use the GRU.
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>
|