26 Jul, 2008
1 commit
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This patch #if 0's the unused hpet_unregister().
Signed-off-by: Adrian Bunk
Acked-by: Clemens Ladisch
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Jun, 2008
1 commit
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Signed-off-by: Arnd Bergmann
30 Apr, 2008
1 commit
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__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: Harvey Harrison
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Apr, 2008
1 commit
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The commits:
commit 37a47db8d7f0f38dac5acf5a13abbc8f401707fa
Author: Balaji Rao
Date: Wed Jan 30 13:30:03 2008 +0100x86: assign IRQs to HPET timers, fix
and
commit e3f37a54f690d3e64995ea7ecea08c5ab3070faf
Author: Balaji Rao
Date: Wed Jan 30 13:30:03 2008 +0100x86: assign IRQs to HPET timers
have been identified to cause a regression on some platforms due to
the assignement of legacy IRQs which makes the legacy devices
connected to those IRQs disfunctional.Revert them.
This fixes http://bugzilla.kernel.org/show_bug.cgi?id=10382
Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar
30 Jan, 2008
3 commits
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No users, just ballast
Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar -
Looks like IRQ 31 is assigned to timer 3, even without the patch!
I wonder who wrote the number 31. But the manual says that it is
zero by default.I think we should check whether the timer has been allocated an IRQ before
proceeding to assign one to it. Here is a patch that does this.Signed-off-by: Balaji Rao
Tested-by: Yinghai Lu
Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner -
The userspace API for the HPET (see Documentation/hpet.txt) did not work. The
HPET_IE_ON ioctl was failing as there was no IRQ assigned to the timer
device. This patch fixes it by allocating IRQs to timer blocks in the HPET.arch/x86/kernel/hpet.c | 13 +++++--------
drivers/char/hpet.c | 45 ++++++++++++++++++++++++++++++++++++++-------
include/linux/hpet.h | 2 +-
3 files changed, 44 insertions(+), 16 deletions(-)Signed-off-by: Balaji Rao
Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner
27 Sep, 2007
1 commit
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Following patch silents;
...
drivers/char/hpet.c:72: warning: 'clocksource_hpet' defined but not used
drivers/char/hpet.c:81: warning: 'hpet_clocksource' defined but not used
...build warnings on i386, they appeared after commit 3b2b64fd311c92f2137eb7cee7025794cd854057
Signed-off-by: S.Çağlar Onur
Signed-off-by: Linus Torvalds
--
drivers/char/hpet.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
26 Sep, 2007
1 commit
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If hpet has been initialized before registering hpet driver, the callback
function of hpet_resources will return the status code of -EBUSY, which is
not defined in the ACPI exception table. So when ACPI checks the status
code of callback function, it will report the unknown exception code.So the status code in ACPI is used instead of the generic error code in the
ACPI callback function of hpet_resources.
For example: -EBUSY is replaced by AE_ALREADY_EXISTS
-EINVAL is replaced by AE_NO_MEMORYhttp://bugzilla.kernel.org/show_bug.cgi?id=8630
Signed-off-by: Zhao Yakui
Signed-off-by: Len Brown
01 Sep, 2007
1 commit
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The HPET clocksource in drivers/char/hpet.c was written as generic code
for ia64, but it is not yet ready to replace the native HPET clocksource
implementations that the i386/x86-64 architectures use.On x86[-64], trying to register this clocksource results in potentially
multiple hpet-based clocksources being registered, and if the ia64 one
is chosen on x86_64 some users have experienced hangs.Eventually all three architectures may end up using the same code, but
that is not the case right now.Cc: John Stultz
Cc: Tony Luck
Cc: Paolo Ornati
Cc: Bob Picco
Cc: Thomas Gleixner
Cc: Andrew Morton
Signed-off-by: Linus Torvalds
27 Jul, 2007
1 commit
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Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
24 Jul, 2007
1 commit
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modpost is going to use these to create e.g. acpi:ACPI0001
in modules.alias.Signed-off-by: Thomas Renninger
Signed-off-by: Len Brown
21 Jul, 2007
1 commit
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This is a merge of Peter Keilty's initial patch (which was
revived by Bob Picco) for this with Hidetoshi Seto's fixes
and scaling improvements.Acked-by: Bob Picco
Signed-off-by: Tony Luck
15 Feb, 2007
2 commits
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The semantic effect of insert_at_head is that it would allow new registered
sysctl entries to override existing sysctl entries of the same name. Which is
pain for caching and the proc interface never implemented.I have done an audit and discovered that none of the current users of
register_sysctl care as (excpet for directories) they do not register
duplicate sysctl entries.So this patch simply removes the support for overriding existing entries in
the sys_sysctl interface since no one uses it or cares and it makes future
enhancments harder.Signed-off-by: Eric W. Biederman
Acked-by: Ralf Baechle
Acked-by: Martin Schwidefsky
Cc: Russell King
Cc: David Howells
Cc: "Luck, Tony"
Cc: Ralf Baechle
Cc: Paul Mackerras
Cc: Martin Schwidefsky
Cc: Andi Kleen
Cc: Jens Axboe
Cc: Corey Minyard
Cc: Neil Brown
Cc: "John W. Linville"
Cc: James Bottomley
Cc: Jan Kara
Cc: Trond Myklebust
Cc: Mark Fasheh
Cc: David Chinner
Cc: "David S. Miller"
Cc: Patrick McHardy
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In the binary sysctl interface the hpet driver was claiming to be the cdrom
driver. This is a no-no so remove support for the binary interface.Signed-off-by: Eric W. Biederman
Acked-by: Clemens Ladisch
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Dec, 2006
1 commit
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Signed-off-by: Al Viro
05 Oct, 2006
1 commit
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Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.Signed-Off-By: David Howells
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
26 Sep, 2006
1 commit
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virtual addresses don't belong into kernel logs for non debugging
Cc: clemens@ladisch.de
Signed-off-by: Andi Kleen
04 Jul, 2006
1 commit
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Mark the static struct file_operations in drivers/char as const. Making
them const prevents accidental bugs, and moves them to the .rodata section
so that they no longer do any false sharing; in addition with the proper
debug option they are then protected against corruption..[akpm@osdl.org: build fix]
Signed-off-by: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Jul, 2006
1 commit
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Signed-off-by: Thomas Gleixner
Cc: Ingo Molnar
Cc: "David S. Miller"
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Jul, 2006
1 commit
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Signed-off-by: Jörn Engel
Signed-off-by: Adrian Bunk
02 Apr, 2006
1 commit
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ACPI address space descriptors contain _MIN, _MAX, and _LEN. _MIN and _MAX
are the bounds within which the region can be moved (this is clarified in
Table 6-38 of the ACPI 3.0 spec). We should use _LEN to determine the size
of the region, not _MAX - _MIN + 1.Signed-off-by: Bjorn Helgaas
Signed-off-by: Andrew Morton
Signed-off-by: Len Brown
15 Feb, 2006
1 commit
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When the _CRS for a single HPET contains multiple EXTENDED_IRQ resources,
we overwrote hdp->hd_nirqs every time we found one.So the driver worked when all the IRQs were described in a single
EXTENDED_IRQ resource, but failed when multiple resources were used.
(Strictly speaking, I think the latter is actually more correct, but both
styles have been used.)Someday we should remove all the ACPI stuff from hpet.c and use PNP driver
registration instead. But currently PNP_MAX_IRQ is 2, and HPETs often have
more IRQs. Hint, hint, Adam :-)Signed-off-by: Bjorn Helgaas
Acked-by: Bob Picco
Cc: Venkatesh Pallipadi
Cc: Len Brown
Cc: Adam Belay
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Dec, 2005
1 commit
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Completed a major overhaul of the Resource Manager code -
specifically, optimizations in the area of the AML/internal
resource conversion code. The code has been optimized to
simplify and eliminate duplicated code, CPU stack use has
been decreased by optimizing function parameters and local
variables, and naming conventions across the manager have
been standardized for clarity and ease of maintenance (this
includes function, parameter, variable, and struct/typedef
names.)All Resource Manager dispatch and information tables have
been moved to a single location for clarity and ease of
maintenance. One new file was created, named "rsinfo.c".The ACPI return macros (return_ACPI_STATUS, etc.) have
been modified to guarantee that the argument is
not evaluated twice, making them less prone to macro
side-effects. However, since there exists the possibility
of additional stack use if a particular compiler cannot
optimize them (such as in the debug generation case),
the original macros are optionally available. Note that
some invocations of the return_VALUE macro may now cause
size mismatch warnings; the return_UINT8 and return_UINT32
macros are provided to eliminate these. (From Randy Dunlap)Implemented a new mechanism to enable debug tracing for
individual control methods. A new external interface,
acpi_debug_trace(), is provided to enable this mechanism. The
intent is to allow the host OS to easily enable and disable
tracing for problematic control methods. This interface
can be easily exposed to a user or debugger interface if
desired. See the file psxface.c for details.acpi_ut_callocate() will now return a valid pointer if a
length of zero is specified - a length of one is used
and a warning is issued. This matches the behavior of
acpi_ut_allocate().Signed-off-by: Bob Moore
Signed-off-by: Len Brown
07 Dec, 2005
1 commit
31 Oct, 2005
15 commits
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- Use kzalloc() instead of kmalloc + memset.
- Clean/fix some printk's.
- Use NULL for pointers instead of 0.
- Combine hpet busy searching locations into a function call.Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
- Use HPET physical address to detect duplicates, not logical addresses.
Using logical (mapped) addresses fails to detect duplicates
because ioremap() returns a new mapped address each time.- iounmap() regions when duplicate/busy areas are found.
Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Allow the ACPI HPET description table to use a resource type of FIXED_MEM32
for the HPET reource. Use the fixed resoure size of 1 KB for the HPET
resource as per the HPET spec.Signed-off-by: Randy Dunlap
Acked-by: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When booting, display the timer frequency in Hertz instead of as tick length
in nanoseconds. Apart from saving a local variable, this makes the message
more easily comprehensible.Signed-off-by: Clemens Ladisch
Cc: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In the hpet_ioctl_common() function, devp->hd_hpets is already cached in the
hpetp variable, so we can use just that.Signed-off-by: Clemens Ladisch
Cc: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix two instances where a function would access the first HPET device instead
of the current one.Signed-off-by: Clemens Ladisch
Cc: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Clear the ht_opaque field in the hpet_register() function before searching for
a free timer to prevent the function from incorrectly assuming that the search
succeeded afterwards.Signed-off-by: Clemens Ladisch
Cc: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix a division by zero that happened when the HPET_INFO ioctl was called
before a timer frequency had been set.Signed-off-by: Clemens Ladisch
Cc: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix a wrong memory access in hpet_ioctl_common(). It was not possible to use
the HPET_INFO ioctl from kernel space because it always called copy_to_user().Signed-off-by: Clemens Ladisch
Cc: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch adds support for shared HPET interrupts.
The driver previously acknowledged interrupts for both edge and level
interrupts, but didn't actually allow a shared interrupt in the latter case.We use a new per-timer flag to save whether the timer's interrupt might be
shared, and use it to do the processing required for level interrupts only if
necessary.Signed-off-by: Clemens Ladisch
Acked-by: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It was only the RTC hardware that restricted interrupt frequencies to a power
of two. There is no reason to take over this restriction into the HPET
driver, so remove the offending check.Signed-off-by: Clemens Ladisch
Acked-by: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch removes several reads of a timer's config register that serve no
purpose whatsoever.Signed-off-by: Clemens Ladisch
Acked-by: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The variable hpet_ntimer is never read, so remove it.
Signed-off-by: Clemens Ladisch
Acked-by: Bob Picco
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On 32-bit architectures, the multiplication in the argument for
hpet_time_div() often overflows. In the typical case of a 14.32 MHz timer,
this happens when the desired frequency exceeds 61 Hz.To avoid this multiplication, we can precompute and store the hardware
timer frequency, instead of the period, in the device structure, which
leaves us with a simple division when computing the number of timer ticks.As a side effect, this also removes a theoretical bug where the timer
interpolator's frequency would be computed as a 32-bit value even if the
HPET frequency is greater than 2^32 Hz (the HPET spec allows up to 10 GHz).Signed-off-by: Clemens Ladisch
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Disallow setting an interrupt frequency of zero (which would result in a
division by zero), and disallow enabling the interrupt when the frequency
hasn't yet been set (which would use an interrupt period of zero).Signed-off-by: Clemens Ladisch
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
