Commit Graph

154 Commits

Author SHA1 Message Date
hawkes@sgi.com defbb2c929 [IA64] ia64: simplify and fix udelay()
The original ia64 udelay() was simple, but flawed for platforms without
synchronized ITCs:  a preemption and migration to another CPU during the
while-loop likely resulted in too-early termination or very, very
lengthy looping.

The first fix (now in 2.6.15) broke the delay loop into smaller,
non-preemptible chunks, reenabling preemption between the chunks.  This
fix is flawed in that the total udelay is computed to be the sum of just
the non-premptible while-loop pieces, i.e., not counting the time spent
in the interim preemptible periods.  If an interrupt or a migration
occurs during one of these interim periods, then that time is invisible
and only serves to lengthen the effective udelay().

This new fix backs out the current flawed fix and returns to a simple
udelay(), fully preemptible and interruptible.  It implements two simple
alternative udelay() routines:  one a default generic version that uses
ia64_get_itc(), and the other an sn-specific version that uses that
platform's RTC.

Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 13:37:04 -08:00
Dean Nelson 4c2cd96696 [IA64-SGI] enforce proper ordering of callouts by XPC
Fix XPC so that it does not deliver any messages until the connected
callout has returned, as well as, prevent the disconnected callout to
occur before the disconnecting callout has returned.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 13:35:03 -08:00
Dean Roe c2a4969ba1 [IA64-SGI] fix the size of __sn_cnodeid_to_nasid
The __sn_cnodeid_to_nasid array was incorrectly sized at MAX_NUMNODES.
On a large system, this array could overflow.  The following patch
corrects this by defining it to MAX_COMPACT_NODES.

Signed-off-by: Dean Roe <roe@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 13:33:48 -08:00
Mark Maule 9c65cb9be6 [IA64-SGI] export sn_pcidev_info_get
Export sn_pcidev_info_get.

Signed-off-by Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 13:28:48 -08:00
Jes Sorensen 26d10915de [IA64-SGI] remove compile time warning
This one falls into the "present for Andrew Morton" category to address
his wishlist for a compiler warning free build ;-)

Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 13:27:02 -08:00
Jes Sorensen d3454344b3 [IA64] remove obsolete corporate address
Remove obsolete SGI address

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 13:25:37 -08:00
Jes Sorensen 8ed9b2c7a8 [IA64-SGI] sn2 minor fixes and cleanups
General SN2 code cleanup:
 - Do not initialize global variables to zero
 - Use kzalloc instead of kmalloc+memset
 - Check kmalloc return values
 - Do not obfuscate spin lock calls
 - Remove some unused code
 - Various formatting cleanups

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-15 13:24:45 -08:00
Prarit Bhargava b6bb761897 [IA64-SGI] Small cleanup for misuse of list_for_each to list_for_each_safe.
Patch was suggested by Kenneth W. Chen here

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-09 14:14:52 -08:00
Prarit Bhargava 8b34ff427d [IA64-SGI] Hotplug driver related fix in the SN ia64 code.
Remove an erroneous kfree, and unlink the pcidev_info struct from the
pcidev_info list prior to free'ing the pcidev_info struct.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-09 14:12:24 -08:00
Linus Torvalds 0bdd340c09 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2006-02-08 17:06:51 -08:00
Jes Sorensen f478af9dc5 [IA64] prevent sn2 specific code to be run in generic kernels
Prevent SN2 specific code to be executed on non SN2 platforms when
running a generic kernel.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-08 11:57:16 -08:00
Al Viro 4fb7d9827e [PATCH] drive_info removal outside of arch/i386
drive_info is used only by hd.c and that happens under #ifdef __i386__.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2006-02-07 20:56:47 -05:00
Tony Luck d6e56a2a08 [IA64] Fix CONFIG_PRINTK_TIME
There were two problems with enabling the PRINTK_TIME config
option:
1) The first calls to printk() occur before per-cpu data virtual
address is pinned into the TLB, so sched_clock() can fault.
2) sched_clock() is based on ar.itc, which may not be synchronized
across cpus.

Ken Chen started this patch, Tony Luck tinkered with it, and Jes
Sorensen perfected it.

Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-07 15:25:57 -08:00
Russ Anderson 913e4a7557 [IA64-SGI] Shub2 BTE address fix
After converting the cpu physical address to shub2 physical
addressing, the address was run through TO_PHYS() which
clobbered a high node offset bit causing the BTE to fail
on shub2 nodes with large memory.  This fix corrects
that problem.

Signed-off-by: Russ Anderson (rja@sgi.com)
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-06 09:28:10 -08:00
Tony Luck 27ee6e0592 Pull sn-recursive-flags-for-select-builds into release branch 2006-02-06 09:23:51 -08:00
Robin Holt 7c6c663629 [IA64-SGI] Fix XPC code which sleeps with spin_lock_irqsave().
During some testing, we got a warning about trying to allocate
memory while holding a lock.  This fixes that problem.

Signed-off-by: Robin Holt <holt@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-02 13:37:46 -08:00
Jes Sorensen 2fcc3db0cc [IA64-SGI] sn2 housekeeping
Maintenance patch:
 - Add missing __init calls
 - Do not zero initialize global variables
 - No need to typecast function call returns to void
 - Some formatting

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-02 13:35:59 -08:00
Mark Maule a80dcc0b96 [IA64-SGI] disable msi for all altix pci devices
Temporary patch to make pci_enable_msi() fail gracefully on altix.  Will be
removed after 2.6.16 releases and the msi abstraction patches start flowing.

Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-02 13:23:02 -08:00
Mark Maule 689388bbf8 [IA64-SGI] fix smp_affinity redirection when using CONFIG_PCI_MSI
Redirecting interrupts using smp_affinity on altix does not work on kernels
built with CONFIG_PCI_MSI.  The problem is that move_irq() turns into a noop
if MSI is built in.  This patch calls move_native_irq() instead of move_irq()
to get around that.

Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-02-02 13:22:15 -08:00
Tony Luck df080e7c94 Pull update-tlbflush-sn into release branch 2006-02-02 13:16:29 -08:00
Jack Steiner 61a34a024f [IA64-SGI] Update TLB flushing code for SN platform
This patch finishes support for SHUB2 (the new chipset). Most of the
changes are performance related. A few changes are workarounds for
"interesting" chipset features.

Some temporary debugging code has also been deleted.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-26 15:03:41 -08:00
Prarit Bhargava 61d67f2e07 [IA64-SGI] Add PROM feature set for device flush list
Introduce PRF_DEVICE_FLUSH_LIST flag for older PROMs.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-26 13:50:40 -08:00
Keith Owens 103ec0910d [IA64-SGI] Recursive flags do not work for selective builds
arch/ia64/sn/Makefile sets CPPFLAGS, expecting that setting to
propogate to all the subdirectories.  For a normal build with its
recursive descent it does work, but doing a selective build like
'make arch/ia64/sn/kernel/io_init.i' does not do a recursive descent,
it goes directly to arch/ia64/sn/kernel/Makefile so the flags do not
get set.

To support selective builds, set the flags in all the subordinate Makefiles.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-26 13:17:34 -08:00
Jes Sorensen 139366a093 [IA64-SGI] XPC remove unnecessary GFP_DMA flag
Remove the GFP_DMA flag from XPC kmalloc() calls.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-24 15:49:49 -08:00
Takashi Iwai dc64161343 [IA64-SGI] sn_dma_alloc_coherent should use gfp flags
Takashi helped us track down a bad page state bug we thought was coming
from alsa.  It turns out we weren't paying attention to the gfp flags
that were passed in to sn_dma_alloc_coherent().

From: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Edwards <edwardsg@sgi.com>
Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Jes Sorensen <jes@sgi.com>
2006-01-24 14:30:56 -08:00
Jes Sorensen f9e505a9a0 [IA64-SGI] sn2 mutex conversion
Migrate sn2 code to use mutex and completion events rather than
semaphores.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-17 13:53:24 -08:00
Mike Habeck ac354a899b [IA64-SGI] pass segment# on SN_SAL_IOIF_SLOT_{DIS,EN}ABLE calls
Bugfix... the altix SN_SAL_IOIF_SLOT_ENABLE & SN_SAL_IOIF_SLOT_DISABLE
SAL calls need to pass the segment# down

Signed-off-by: Mike Habeck <habeck@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-17 10:22:46 -08:00
Prarit Bhargava 5f7f5b0c99 [IA64-SGI] Older PROM WAR for device flush code
Work-around to temporarily support older PROMs with new flush device code.

This code allows systems running older PROMs to continue to run on the new
kernel base until a new official PROM is released.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Acked-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-17 10:08:37 -08:00
Prarit Bhargava 53493dcf6e [IA64] Cleanup of arch/ia64/sn and include/asm-ia64/sn
Replace uintX_t declarations with uX declarations.
Replace intX_t declarations with sX declarations.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-16 19:54:40 -08:00
Linus Torvalds 3e2b32b693 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2006-01-14 10:42:40 -08:00
Prarit Bhargava 6d6e420005 [IA64-SGI] Fix sn_flush_device_kernel & spinlock initialization
This patch separates the sn_flush_device_list struct into kernel and
common (both kernel and PROM accessible) structures.  As it was, if the
size of a spinlock_t changed (due to additional CONFIG options, etc.) the
sal call which populated the sn_flush_device_list structs would erroneously
write data (and cause memory corruption and/or a panic).

This patch does the following:

1.  Removes sn_flush_device_list and adds sn_flush_device_common and
sn_flush_device_kernel.

2.  Adds a new SAL call to populate a sn_flush_device_common struct per
device, not per widget as previously done.

3.  Correctly initializes each device's sn_flush_device_kernel spinlock_t
struct (before it was only doing each widget's first device).

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 14:13:08 -08:00
Russ Anderson 17e8ce0e94 [IA64-SGI] Altix BTE error handling fixes
Altix (shub2) pushes the BTE clean-up into SAL.
This patch correctly interfaces with the now implemented SAL call.
It also fixes a bug when delaying clean-up to allow busy BTEs to
complete (or error out).

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 14:06:53 -08:00
Russell King 83dfb8b675 [PATCH] Add tiocx bus_type probe/remove methods
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-13 11:26:05 -08:00
Dean Nelson 9335d48e10 [IA64-SGI] move xpc.h to include/asm-ia64/sn (cleanup)
Cleanup a few items after moving xpc.h from arch/ia64/sn/kernel to
include/asm-ia64/sn.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 10:40:23 -08:00
Dean Nelson 87a149d6bb [IA64-SGI] move xpc.h to include/asm-ia64/sn
Move xpc.h from arch/ia64/sn/kernel to include/asm-ia64/sn without change.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 10:39:34 -08:00
Dean Nelson d6ad033a88 [IA64-SGI] move xpc_system_reboot()
Move xpc_system_reboot() to be closer to the file it calls for readability
reasons (which are indeed subjective).

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 10:36:27 -08:00
Dean Nelson 1f4674b2d5 [IA64-SGI] ignoring loss of heartbeat while XPC is in kdebug
Allow for the loss of heartbeat while in kdebug to be ignored by remote
partitions.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 10:35:02 -08:00
Dean Nelson 0752c670d8 [IA64-SGI] XPC and unregistering from notifier lists
Only unregister from notifier lists if XPC is unloading.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 10:33:44 -08:00
Dean Nelson 1ecaded80f [IA64-SGI] cleanup XPC disengage related messages
Cleanup the XPC disengage related messages that are printed to the log.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 10:19:14 -08:00
Dean Nelson 246c7e33d5 [IA64-SGI] ensure XPC disengage request is processed
This patch fixes a problem in XPC disengage processing whereby it was not
seeing the request to disengage from a remote partition, so the disengage
wasn't happening. The disengagement is suppose to transpire during the time
a XPC channel is disconnecting, and should be completed before the channel
is declared to be disconnected.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2006-01-13 10:16:36 -08:00
Randy Dunlap a941564458 [PATCH] capable/capability.h (arch/)
arch: Use <linux/capability.h> where capable() is used.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-11 18:42:14 -08:00
Paul Jackson 6d20b035de [PATCH] driver kill hotplug word from sn and others fix
The first of these changes s/hotplug/uevent/ was needed to
compile sn2_defconfig (ia64/sn).  The other three files
changed are blind changes of all remaining bus_type.hotplug
references I could find to bus_type.uevent.

This patch attempts to finish similar changes made in the
gregkh-driver-kill-hotplug-word-from-driver-core Nov 22 patch.

Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-04 16:18:08 -08:00
Jack Steiner d74700e604 [IA64-SGI] Missed TLB flush
I see why the problem exists only on SN. SN uses a different hardware
mechanism to purge TLB entries across nodes.

It looks like there is a bug in the SN TLB flushing code. During context switch,
kernel threads inherit the mm of the task that was previously running on the
cpu. This confuses the code in sn2_global_tlb_purge().

The result is a missed TLB purge for the task that owns the "borrowed" mm.

(I hit the problem running heavy stress where kswapd was purging code pages of
a user task that woke kswapd. The user task took a SIGILL fault trying to
execute code in the page that had been ripped out from underneath it).

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-16 10:46:25 -08:00
Al Viro b3e5b5b227 [PATCH] ia64 sn __iomem annotations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-12-15 10:04:31 -08:00
Jack Steiner 590711b7dd [IA64-SGI] Fix SN PTC deadlock recovery
The patch that added support for a new platform chipset (shub2) broke
PTC deadlock recovery on older versions of the chipset. (PTCs are the
SN platform-specific method for doing a global TLB purge). This
patch fixes deadlock recovery so that it works on both the old & new
chipsets.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-06 09:13:42 -08:00
John Keller 3ec829b689 [IA64-SGI] altix: pci_window fixup
Altix only patch to add fixup code that sets up
pci_controller->window. This code is a temporary
fix until ACPI support on Altix is added.

Also, corrects the usage of pci_dev->sysdata,
which had previously been used to reference
platform specific device info, to now point to
a pci_controller struct.

Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-12-06 09:09:23 -08:00
Russ Anderson ab2ff46a2d [IA64-SGI] bte_copy nasid_index fix
The nasid_index was not being incremented if the
pointer was null, causing an infinite loop.

Signed-off-by: Russ Anderson (rja@sgi.com)
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-21 14:19:36 -08:00
hawkes@sgi.com 090de0b77c [IA64] fix bug in sn/ia64 for sparse CPU numbering
The kernel's use of the for_each_*cpu(i) macros has allowed for sparse CPU
numbering.  When I hacked the kernel to test sparse cpu_present_map[] and
cpu_possible_map[] cpumasks, I discovered one remaining spot, in
sn_hwperf_ioctl() during sn initialization, that needs to be fixed.

Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Dean Roe <roe@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-21 14:15:42 -08:00
Prarit Bhargava 9ad4f924ec [IA64] Prevent sn2 ptc code from executing on all ia64 subarches
Patch to prevent sn2_ptc_init code from attempting to load on non-sn2 systems
when sn2_smp.c is built-in to generic kernel.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-21 14:13:31 -08:00
Mark Maule ff51224cab [IA64-SGI] set altix preferred console
Fix default VGA console on SN platforms.  Since SN firmware does not pass
enough ACPI information to identify VGA cards and the associated legacy IO/MEM
addresses, we rely on the EFI PCDP table.  Since the linux pcdp driver is
optional (and overridden if console= directives are used) SN duplicates a
portion of the pcdp scan code to identify if there is a usable console VGA
adapter.  Additionally, dup necessary pcdp related structs to avoid dragging
drivers/pcdp.h into a more public location.

Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-11-11 11:24:26 -08:00