Provide load average information for spu context. The format
is identical to /proc/loadavg, which is also where a lot of code
and concepts is borrowed from.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The new tid file contains the ID of the thread currently running the
context, if any. This is used so that the new spu-top and spu-ps
tools can find the thread in /proc.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Remove redundant whitespace in arch/powerpc/platforms/cell/spufs/
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
spufs_dir_inode_operations is exactly the same as
simple_dir_inode_operations. Use that instead.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
And last but not least we need to make sure the scheduler tick never
preempts a nosched context.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
spu_deactivate should never be called for nosched contets. Put in
a check so we can print a stacktrace and exit early in case it
happes erroneously.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Add a cpus_allowed allowed filed to struct spu_context so that we always
use the cpu mask of the owning thread instead of the one happening to
call into the scheduler. Also use this information in
grab_runnable_context to avoid spurious wakeups.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Update scheduling information on every spu_run to allow for setting
threads to realtime priority just before running them. This requires
some slightly ugly code in spufs_run_spu because we can just update
the information unlocked if the spu is not runnable, but we need to
acquire the active_mutex when it is runnable to protect against
find_victim. This locking scheme requires opencoding
spu_acquire_runnable in spufs_run_spu which actually is a nice cleanup
all by itself.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Print out a few scheduler tuning parameters when we've compiled
with DEBUG defined.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The current timeslice code mixes 'jiffies' up with 'spesched ticks'. This
change correctly defines the number of time slices each SPE contexts is
given, and clarifies the comment.
This brings the default timeslice for SPE contexts into a reasonable
range.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Enable preemptive scheduling for non-RT contexts.
We use the same algorithms as the CPU scheduler to calculate the time
slice length, and for now we also use the same timeslice length as the
CPU scheduler. This might be not enough for good performance and can be
changed after some benchmarking.
Note that currently we do not boost the priority for contexts waiting
on the runqueue for a long time, so contexts with a higher nice value
could starve ones with less priority. This could easily be fixed once
the rework of the spu lists that Luke and I discussed is done.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Get rid of the scheduler workqueues that complicated things a lot to
a dedicated spu scheduler thread that gets woken by a traditional
scheduler tick. By default this scheduler tick runs a HZ * 10, aka
one spu scheduler tick for every 10 cpu ticks.
Currently the tick is not disabled when we have less context than
available spus, but I will implement this later.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Add a bit define from book, and replace one hex number with a
symbol, for clarity.
Signed-off-by: Sebastian Siewior <bigeasy@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Currently it fails with gcc from sdk 2.1 because of a spec change [1].
Maybe we should start using the definitions from spu_mfcio.h.
[1] http://gcc.gnu.org/ml/gcc-patches/2006-11/msg01598.html
Signed-off-by: Sebastian Siewior <bigeasy@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The PXA CKEN changes broken syspend/resume on the pxa27x. This patch
corrects the problem and fixes another couple of bad references.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM Versatile PCI config reads of one byte width have the lowest two
bits of the address cleared and result in reading from a wrong place
in the config space. This change is to use word size accesses like it is done for halfword reads.
Byte reads are used for retrieving the IRQ number of a PCI device and the problem was not exposed until 2.6.20 because the value read was discarded in drivers/pci/setup-irq.c (recently fixed).
Signed-off-by: Andrzej Zaborowski <andrew@openedhand.com>
Acked-by: Paul Brook <paul@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Uninline virq_to_hw and export it so modules can use it. The alternative
would be to export the irq_map array instead, but it's an infrequently
called function, and keeping the array unexported seems considerably
cleaner.
This is needed so that the pasemi_mac driver can be compiled as a module.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The recent change to cell_defconfig to enable cpufreq on Cell exposed
the fact that the cbe_cpufreq driver currently needs the PMI interface
code to compile, but Kconfig doesn't make sure that the PMI interface
code gets built if cbe_cpufreq is enabled.
In fact cbe_cpufreq can work without PMI, so this ifdefs out the code
that deals with PMI. This is a minimal solution for 2.6.22; a more
comprehensive solution will be merged for 2.6.23.
Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Commit 52ade9b3b9 changed the suspend code
ordering to execute pm_ops->prepare() after the device model per-device
.suspend() calls in order to fix some ACPI-related issues. Unfortunately, it
broke the at91 platform which assumed that pm_ops->prepare() would be called
before suspending devices.
at91 used pm_ops->prepare() to get notified of the target system sleep state,
so that it could use this information while suspending devices. However, with
the current suspend code ordering pm_ops->prepare() is called too late for
this purpose. Thus, at91 needs an additional method in 'struct pm_ops' that
will be used for notifying the platform of the target system sleep state.
Moreover, in the future such a method will also be needed by ACPI.
This patch adds the .set_target() method to 'struct pm_ops' and makes the
suspend code call it, if implemented, before executing the device model
per-device .suspend() calls. It also modifies the at91 code to use
pm_ops->set_target() instead of pm_ops->prepare().
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 3ebad59056 ("[PATCH] x86: Save and
restore the fixed-range MTRRs of the BSP when suspending") added mtrr
operations without verifying that the CPU has MTRRs. Crashes transmeta
CPUs.
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux@horizon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit 9215da3320 "fixed" the MTRR range
check to not allow any MTRR's under the 1MB mark (since that's where the
fixed MTRR's are active).
However, that was totally bogus, since it's normal (and almost required)
to have a large variable MTRR that starts at 0, and covers some large
percentage of the whole RAM, and then using the fixed MTRR's to override
that large MTRR to handle the special ISA hole in the 640k-1M region.
The old check was bogus too (checking that no variable MTRR is used that
is entirely under the 1MB range), but at least it wasn't actively
detrimental, because no sane situation would ever trigger such MTRR
usage in the first place.
That said, the whole notion of not allowing variable MTRR's in the low
1MB is just stupid, so rather than revert the commit, this just removes
the whole sad and unnecessary check entirely.
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Luca Palermo <darkmage@sabayonlinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC64]: Add linux/pagemap.h to asm/tlb.h
[SPARC64]: Need to set state to IDLE during sun4v IRQ enable.
[SPARC64]: Fix VIRQ enabling.
[SPARC64]: Add irqs to mdesc_node.
The vdso64 portion of patch 74609f4536 for
fixing problems with NULL gettimeofday input mistakenly checks for a
null tz field twice, when it should be checking for null tz once, and
null tv once; by way of a r10/r11 typo.
Any application calling gettimeofday(&tv,NULL) will "fail".
This corrects that typo, and makes my G5 happy.
Tested on G5.
Signed-off-by: Will Schmidt <will_schmidt@vnet.ibm.com>
Cc: Tony Breeds <tony@bakeyournoodle.com>
Forwarded-by: Ben Herrenschmidt <benh@kernel.crashing.org>
[ Ben says: "I checked the 32 bits part of the change is correct. You
can probably blame me for originally writing the 2 versions with
inversed usage of r10 and r11, thus confusing Tony :-)"
Ben duly blamed. - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use the ppc64 style list management and allocation functions for
pci_controllers. This makes the pci_controller structs just a bit more
common between ppc32 & ppc64.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Moved the low hanging fruit that was either identical or close
to it between ppc32 & ppc64 for PCI into pci-common.c
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
In the places we can move to using pci_bus_to_host, this allows us
to make pci_bus_to_host static and remove its export.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Make the ppc32 pcibios_alloc_controller take a device node to match
the ppc64 prototypes and have it set arch_data.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Make the pci_controller struct use global_number for the PHB domain number
instead of index to match what ppc64 does and reuse its pci_domain_nr code.
Introduced a pci-common.c to handle shared code between ppc32 & ppc64.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
There are no in kernel users of any off these functions and some of
them were not even EXPORT_SYMBOL:
- pci_bus_io_base()
- pci_bus_io_base_phys()
- pci_bus_mem_base_phys()
- pci_resource_to_bus()
- phys_to_bus()
- pci_phys_to_bus()
- pci_bus_to_phys()
- pci_init_resource()
- resource_fixup()
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The Freescale PCI-e RC poses as a transparent bridge, but does not
implement the IO_BASE or IO_LIMIT registers in the config space. This
means that the code which initializes the bridge resources ends up
setting the IO resources erroneously. Add quick_fsl_pcie_transparent()
to handle this.
This change sets RC of mpc8641 to be a transparent bridge
for legacy I/O access and initializes the RC bridge resources
from the device tree.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
In pcibios_fixup_bus(), bridges that are subordinate
to transparent bridges were still relocating their
IORESOURCE_IO and IO_RESOURCE_MEM start and end values.
Fix this by preventing the transparent bridge from
relocating the start and end values, thus allowing the
subordinate non-transparent bridge full molestation rights.
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Set IDE in ULI1575 to not 100% native mode, which forces
the IDE driver to probe the irq itself.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The Freescale PCI-e controllers have an issue in that they use the
PCI_PRIMARY_BUS register in the virtual P2P bridge to determine which
bus number to match on when generating a type 0 config cycle. The
issue is if we are renumbering bus numbers to match Linux we will try
setting the PCI_PRIMARY_BUS and will not know which bus number to use
for generating type 0 config cycles. We surpress writing the register
in the P2P bridge and always keep it at zero.
In the future when proper PCI domain support is working we should be
able to remove this.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
We check the Link Training and State Status register to make sure we
are at least at the L0 state.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Acked-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The generic PCI config ops indirect support for ppc32 covers only two
cases (implicit vs explicit) type 0/1 config cycles via set_cfg_type.
Added a indirect_type bit mask to handle other variants.
Added support for PCI-e extended registers and moved the cfg_type
handling into the bit mask for ARCH=powerpc. We can also use this to
handle indirect quirks.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This adds device nodes for the PCI bridges as well as the ISA devices on
the newer revision MPC8641HPCN. It also adds the PCI ranges to the soc
node so that address translation for the ISA devices works properly.
Signed-off-by: Wade Farnsworth <wfarnsworth@mvista.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Remove errata for PCI-e support of Rev 1.0 of MPC8641 since its considered
obselete and is not production level silicon from Freescale.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Acked-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Removed the remants of bus_offset and use self_busno in the mv64x60 case
and use pci_assign_all_buses on 83xx/85xx.
83xx/85xx have multiple PHBs and the firmwares on these devices tend not
to handle topologies with P2P bridges well so we let Linux just reassign
the bus numbers to match.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Added self_busno to pci_controller and indirect PCI ops to be set by
board code to indicate which bus number to use when talking to the PHB.
By default we use zero since the majority of controllers that have
implicit mechanisms to talk to the PHBs use a bus number of zero.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The user of the fsl_pcie code doesn't set bus_offset and 82xx doesn't
require it either. Remove the places in the code that reference it so
we can remove it all together.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Now that we have the pci_controller in the exclude function we can easy
figure out if the bus number is the PHB or not. The old style of using a
variable setup at init time was actually broken and would only work in
specific cases.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
