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提交 45bd00d3 编写于 作者: I Ingo Molnar
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Merge branch 'linus' into tracing/core 

Merge reason: Pick up kernel/softirq.c update for dependent fix.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
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CREDITS
浏览文件 @ 45bd00d3
......@@ -2800,7 +2800,7 @@ D: Starter of Linux1394 effort
S: ask per mail for current address
N: Nicolas Pitre
E: nico@cam.org
E: nico@fluxnic.net
D: StrongARM SA1100 support integrator & hacker
D: Xscale PXA architecture
D: unified SMC 91C9x/91C11x ethernet driver (smc91x)
......
Documentation/00-INDEX
浏览文件 @ 45bd00d3
......@@ -82,6 +82,8 @@ block/
- info on the Block I/O (BIO) layer.
blockdev/
- info on block devices & drivers
btmrvl.txt
- info on Marvell Bluetooth driver usage.
cachetlb.txt
- describes the cache/TLB flushing interfaces Linux uses.
cdrom/
......
Documentation/ABI/testing/sysfs-bus-pci
浏览文件 @ 45bd00d3
......@@ -84,6 +84,16 @@ Description:
from this part of the device tree.
Depends on CONFIG_HOTPLUG.
What: /sys/bus/pci/devices/.../reset
Date: July 2009
Contact: Michael S. Tsirkin <mst@redhat.com>
Description:
Some devices allow an individual function to be reset
without affecting other functions in the same device.
For devices that have this support, a file named reset
will be present in sysfs. Writing 1 to this file
will perform reset.
What: /sys/bus/pci/devices/.../vpd
Date: February 2008
Contact: Ben Hutchings <bhutchings@solarflare.com>
......
Documentation/DocBook/uio-howto.tmpl
浏览文件 @ 45bd00d3
......@@ -25,6 +25,10 @@
<year>2006-2008</year>
<holder>Hans-Jürgen Koch.</holder>
</copyright>
<copyright>
<year>2009</year>
<holder>Red Hat Inc, Michael S. Tsirkin (mst@redhat.com)</holder>
</copyright>
<legalnotice>
<para>
......@@ -41,6 +45,13 @@ GPL version 2.
</abstract>
<revhistory>
<revision>
<revnumber>0.9</revnumber>
<date>2009-07-16</date>
<authorinitials>mst</authorinitials>
<revremark>Added generic pci driver
</revremark>
</revision>
<revision>
<revnumber>0.8</revnumber>
<date>2008-12-24</date>
......@@ -809,6 +820,158 @@ framework to set up sysfs files for this region. Simply leave it alone.
</chapter>
<chapter id="uio_pci_generic" xreflabel="Using Generic driver for PCI cards">
<?dbhtml filename="uio_pci_generic.html"?>
<title>Generic PCI UIO driver</title>
<para>
The generic driver is a kernel module named uio_pci_generic.
It can work with any device compliant to PCI 2.3 (circa 2002) and
any compliant PCI Express device. Using this, you only need to
write the userspace driver, removing the need to write
a hardware-specific kernel module.
</para>
<sect1 id="uio_pci_generic_binding">
<title>Making the driver recognize the device</title>
<para>
Since the driver does not declare any device ids, it will not get loaded
automatically and will not automatically bind to any devices, you must load it
and allocate id to the driver yourself. For example:
<programlisting>
modprobe uio_pci_generic
echo &quot;8086 10f5&quot; &gt; /sys/bus/pci/drivers/uio_pci_generic/new_id
</programlisting>
</para>
<para>
If there already is a hardware specific kernel driver for your device, the
generic driver still won't bind to it, in this case if you want to use the
generic driver (why would you?) you'll have to manually unbind the hardware
specific driver and bind the generic driver, like this:
<programlisting>
echo -n 0000:00:19.0 &gt; /sys/bus/pci/drivers/e1000e/unbind
echo -n 0000:00:19.0 &gt; /sys/bus/pci/drivers/uio_pci_generic/bind
</programlisting>
</para>
<para>
You can verify that the device has been bound to the driver
by looking for it in sysfs, for example like the following:
<programlisting>
ls -l /sys/bus/pci/devices/0000:00:19.0/driver
</programlisting>
Which if successful should print
<programlisting>
.../0000:00:19.0/driver -&gt; ../../../bus/pci/drivers/uio_pci_generic
</programlisting>
Note that the generic driver will not bind to old PCI 2.2 devices.
If binding the device failed, run the following command:
<programlisting>
dmesg
</programlisting>
and look in the output for failure reasons
</para>
</sect1>
<sect1 id="uio_pci_generic_internals">
<title>Things to know about uio_pci_generic</title>
<para>
Interrupts are handled using the Interrupt Disable bit in the PCI command
register and Interrupt Status bit in the PCI status register. All devices
compliant to PCI 2.3 (circa 2002) and all compliant PCI Express devices should
support these bits. uio_pci_generic detects this support, and won't bind to
devices which do not support the Interrupt Disable Bit in the command register.
</para>
<para>
On each interrupt, uio_pci_generic sets the Interrupt Disable bit.
This prevents the device from generating further interrupts
until the bit is cleared. The userspace driver should clear this
bit before blocking and waiting for more interrupts.
</para>
</sect1>
<sect1 id="uio_pci_generic_userspace">
<title>Writing userspace driver using uio_pci_generic</title>
<para>
Userspace driver can use pci sysfs interface, or the
libpci libray that wraps it, to talk to the device and to
re-enable interrupts by writing to the command register.
</para>
</sect1>
<sect1 id="uio_pci_generic_example">
<title>Example code using uio_pci_generic</title>
<para>
Here is some sample userspace driver code using uio_pci_generic:
<programlisting>
#include &lt;stdlib.h&gt;
#include &lt;stdio.h&gt;
#include &lt;unistd.h&gt;
#include &lt;sys/types.h&gt;
#include &lt;sys/stat.h&gt;
#include &lt;fcntl.h&gt;
#include &lt;errno.h&gt;
int main()
{
int uiofd;
int configfd;
int err;
int i;
unsigned icount;
unsigned char command_high;
uiofd = open(&quot;/dev/uio0&quot;, O_RDONLY);
if (uiofd &lt; 0) {
perror(&quot;uio open:&quot;);
return errno;
}
configfd = open(&quot;/sys/class/uio/uio0/device/config&quot;, O_RDWR);
if (uiofd &lt; 0) {
perror(&quot;config open:&quot;);
return errno;
}
/* Read and cache command value */
err = pread(configfd, &amp;command_high, 1, 5);
if (err != 1) {
perror(&quot;command config read:&quot;);
return errno;
}
command_high &amp;= ~0x4;
for(i = 0;; ++i) {
/* Print out a message, for debugging. */
if (i == 0)
fprintf(stderr, &quot;Started uio test driver.\n&quot;);
else
fprintf(stderr, &quot;Interrupts: %d\n&quot;, icount);
/****************************************/
/* Here we got an interrupt from the
device. Do something to it. */
/****************************************/
/* Re-enable interrupts. */
err = pwrite(configfd, &amp;command_high, 1, 5);
if (err != 1) {
perror(&quot;config write:&quot;);
break;
}
/* Wait for next interrupt. */
err = read(uiofd, &amp;icount, 4);
if (err != 4) {
perror(&quot;uio read:&quot;);
break;
}
}
return errno;
}
</programlisting>
</para>
</sect1>
</chapter>
<appendix id="app1">
<title>Further information</title>
<itemizedlist>
......
Documentation/PCI/pci-error-recovery.txt
浏览文件 @ 45bd00d3
......@@ -4,15 +4,17 @@
February 2, 2006
Current document maintainer:
Linas Vepstas <linas@austin.ibm.com>
Linas Vepstas <linasvepstas@gmail.com>
updated by Richard Lary <rlary@us.ibm.com>
and Mike Mason <mmlnx@us.ibm.com> on 27-Jul-2009
Many PCI bus controllers are able to detect a variety of hardware
PCI errors on the bus, such as parity errors on the data and address
busses, as well as SERR and PERR errors. Some of the more advanced
chipsets are able to deal with these errors; these include PCI-E chipsets,
and the PCI-host bridges found on IBM Power4 and Power5-based pSeries
boxes. A typical action taken is to disconnect the affected device,
and the PCI-host bridges found on IBM Power4, Power5 and Power6-based
pSeries boxes. A typical action taken is to disconnect the affected device,
halting all I/O to it. The goal of a disconnection is to avoid system
corruption; for example, to halt system memory corruption due to DMA's
to "wild" addresses. Typically, a reconnection mechanism is also
......@@ -37,10 +39,11 @@ is forced by the need to handle multi-function devices, that is,
devices that have multiple device drivers associated with them.
In the first stage, each driver is allowed to indicate what type
of reset it desires, the choices being a simple re-enabling of I/O
or requesting a hard reset (a full electrical #RST of the PCI card).
If any driver requests a full reset, that is what will be done.
or requesting a slot reset.
After a full reset and/or a re-enabling of I/O, all drivers are
If any driver requests a slot reset, that is what will be done.
After a reset and/or a re-enabling of I/O, all drivers are
again notified, so that they may then perform any device setup/config
that may be required. After these have all completed, a final
"resume normal operations" event is sent out.
......@@ -101,7 +104,7 @@ if it implements any, it must implement error_detected(). If a callback
is not implemented, the corresponding feature is considered unsupported.
For example, if mmio_enabled() and resume() aren't there, then it
is assumed that the driver is not doing any direct recovery and requires
a reset. If link_reset() is not implemented, the card is assumed as
a slot reset. If link_reset() is not implemented, the card is assumed to
not care about link resets. Typically a driver will want to know about
a slot_reset().
......@@ -111,7 +114,7 @@ sequence described below.
STEP 0: Error Event
-------------------
PCI bus error is detect by the PCI hardware. On powerpc, the slot
A PCI bus error is detected by the PCI hardware. On powerpc, the slot
is isolated, in that all I/O is blocked: all reads return 0xffffffff,
all writes are ignored.
......@@ -139,7 +142,7 @@ The driver must return one of the following result codes:
a chance to extract some diagnostic information (see
mmio_enable, below).
- PCI_ERS_RESULT_NEED_RESET:
Driver returns this if it can't recover without a hard
Driver returns this if it can't recover without a
slot reset.
- PCI_ERS_RESULT_DISCONNECT:
Driver returns this if it doesn't want to recover at all.
......@@ -169,11 +172,11 @@ is STEP 6 (Permanent Failure).
>>> The current powerpc implementation doesn't much care if the device
>>> attempts I/O at this point, or not. I/O's will fail, returning
>>> a value of 0xff on read, and writes will be dropped. If the device
>>> driver attempts more than 10K I/O's to a frozen adapter, it will
>>> assume that the device driver has gone into an infinite loop, and
>>> it will panic the kernel. There doesn't seem to be any other
>>> way of stopping a device driver that insists on spinning on I/O.
>>> a value of 0xff on read, and writes will be dropped. If more than
>>> EEH_MAX_FAILS I/O's are attempted to a frozen adapter, EEH
>>> assumes that the device driver has gone into an infinite loop
>>> and prints an error to syslog. A reboot is then required to
>>> get the device working again.
STEP 2: MMIO Enabled
-------------------
......@@ -182,15 +185,14 @@ DMA), and then calls the mmio_enabled() callback on all affected
device drivers.
This is the "early recovery" call. IOs are allowed again, but DMA is
not (hrm... to be discussed, I prefer not), with some restrictions. This
is NOT a callback for the driver to start operations again, only to
peek/poke at the device, extract diagnostic information, if any, and
eventually do things like trigger a device local reset or some such,
but not restart operations. This is callback is made if all drivers on
a segment agree that they can try to recover and if no automatic link reset
was performed by the HW. If the platform can't just re-enable IOs without
a slot reset or a link reset, it wont call this callback, and instead
will have gone directly to STEP 3 (Link Reset) or STEP 4 (Slot Reset)
not, with some restrictions. This is NOT a callback for the driver to
start operations again, only to peek/poke at the device, extract diagnostic
information, if any, and eventually do things like trigger a device local
reset or some such, but not restart operations. This callback is made if
all drivers on a segment agree that they can try to recover and if no automatic
link reset was performed by the HW. If the platform can't just re-enable IOs
without a slot reset or a link reset, it will not call this callback, and
instead will have gone directly to STEP 3 (Link Reset) or STEP 4 (Slot Reset)
>>> The following is proposed; no platform implements this yet:
>>> Proposal: All I/O's should be done _synchronously_ from within
......@@ -228,9 +230,6 @@ proceeds to either STEP3 (Link Reset) or to STEP 5 (Resume Operations).
If any driver returned PCI_ERS_RESULT_NEED_RESET, then the platform
proceeds to STEP 4 (Slot Reset)
>>> The current powerpc implementation does not implement this callback.
STEP 3: Link Reset
------------------
The platform resets the link, and then calls the link_reset() callback
......@@ -253,16 +252,33 @@ The platform then proceeds to either STEP 4 (Slot Reset) or STEP 5
>>> The current powerpc implementation does not implement this callback.
STEP 4: Slot Reset
------------------
The platform performs a soft or hard reset of the device, and then
calls the slot_reset() callback.
A soft reset consists of asserting the adapter #RST line and then
In response to a return value of PCI_ERS_RESULT_NEED_RESET, the
the platform will peform a slot reset on the requesting PCI device(s).
The actual steps taken by a platform to perform a slot reset
will be platform-dependent. Upon completion of slot reset, the
platform will call the device slot_reset() callback.
Powerpc platforms implement two levels of slot reset:
soft reset(default) and fundamental(optional) reset.
Powerpc soft reset consists of asserting the adapter #RST line and then
restoring the PCI BAR's and PCI configuration header to a state
that is equivalent to what it would be after a fresh system
power-on followed by power-on BIOS/system firmware initialization.
Soft reset is also known as hot-reset.
Powerpc fundamental reset is supported by PCI Express cards only
and results in device's state machines, hardware logic, port states and
configuration registers to initialize to their default conditions.
For most PCI devices, a soft reset will be sufficient for recovery.
Optional fundamental reset is provided to support a limited number
of PCI Express PCI devices for which a soft reset is not sufficient
for recovery.
If the platform supports PCI hotplug, then the reset might be
performed by toggling the slot electrical power off/on.
......@@ -274,10 +290,12 @@ may result in hung devices, kernel panics, or silent data corruption.
This call gives drivers the chance to re-initialize the hardware
(re-download firmware, etc.). At this point, the driver may assume
that he card is in a fresh state and is fully functional. In
particular, interrupt generation should work normally.
that the card is in a fresh state and is fully functional. The slot
is unfrozen and the driver has full access to PCI config space,
memory mapped I/O space and DMA. Interrupts (Legacy, MSI, or MSI-X)
will also be available.
Drivers should not yet restart normal I/O processing operations
Drivers should not restart normal I/O processing operations
at this point. If all device drivers report success on this
callback, the platform will call resume() to complete the sequence,
and let the driver restart normal I/O processing.
......@@ -302,11 +320,21 @@ driver performs device init only from PCI function 0:
- PCI_ERS_RESULT_DISCONNECT
Same as above.
Drivers for PCI Express cards that require a fundamental reset must
set the needs_freset bit in the pci_dev structure in their probe function.
For example, the QLogic qla2xxx driver sets the needs_freset bit for certain
PCI card types:
+ /* Set EEH reset type to fundamental if required by hba */
+ if (IS_QLA24XX(ha) || IS_QLA25XX(ha) || IS_QLA81XX(ha))
+ pdev->needs_freset = 1;
+
Platform proceeds either to STEP 5 (Resume Operations) or STEP 6 (Permanent
Failure).
>>> The current powerpc implementation does not currently try a
>>> power-cycle reset if the driver returned PCI_ERS_RESULT_DISCONNECT.
>>> The current powerpc implementation does not try a power-cycle
>>> reset if the driver returned PCI_ERS_RESULT_DISCONNECT.
>>> However, it probably should.
......@@ -348,7 +376,7 @@ software errors.
Conclusion; General Remarks
---------------------------
The way those callbacks are called is platform policy. A platform with
The way the callbacks are called is platform policy. A platform with
no slot reset capability may want to just "ignore" drivers that can't
recover (disconnect them) and try to let other cards on the same segment
recover. Keep in mind that in most real life cases, though, there will
......@@ -361,8 +389,8 @@ That is, the recovery API only requires that:
- There is no guarantee that interrupt delivery can proceed from any
device on the segment starting from the error detection and until the
resume callback is sent, at which point interrupts are expected to be
fully operational.
slot_reset callback is called, at which point interrupts are expected
to be fully operational.
- There is no guarantee that interrupt delivery is stopped, that is,
a driver that gets an interrupt after detecting an error, or that detects
......@@ -381,16 +409,23 @@ anyway :)
>>> Implementation details for the powerpc platform are discussed in
>>> the file Documentation/powerpc/eeh-pci-error-recovery.txt
>>> As of this writing, there are six device drivers with patches
>>> implementing error recovery. Not all of these patches are in
>>> As of this writing, there is a growing list of device drivers with
>>> patches implementing error recovery. Not all of these patches are in
>>> mainline yet. These may be used as "examples":
>>>
>>> drivers/scsi/ipr.c
>>> drivers/scsi/sym53cxx_2
>>> drivers/scsi/ipr
>>> drivers/scsi/sym53c8xx_2
>>> drivers/scsi/qla2xxx
>>> drivers/scsi/lpfc
>>> drivers/next/bnx2.c
>>> drivers/next/e100.c
>>> drivers/net/e1000
>>> drivers/net/e1000e
>>> drivers/net/ixgb
>>> drivers/net/ixgbe
>>> drivers/net/cxgb3
>>> drivers/net/s2io.c
>>> drivers/net/qlge
The End
-------
Documentation/RCU/RTFP.txt
浏览文件 @ 45bd00d3
......@@ -743,3 +743,80 @@ Revised:
RCU, realtime RCU, sleepable RCU, performance.
"
}
@article{PaulEMcKenney2008RCUOSR
,author="Paul E. McKenney and Jonathan Walpole"
,title="Introducing technology into the {Linux} kernel: a case study"
,Year="2008"
,journal="SIGOPS Oper. Syst. Rev."
,volume="42"
,number="5"
,pages="4--17"
,issn="0163-5980"
,doi={http://doi.acm.org/10.1145/1400097.1400099}
,publisher="ACM"
,address="New York, NY, USA"
,annotation={
Linux changed RCU to a far greater degree than RCU has changed Linux.
}
}
@unpublished{PaulEMcKenney2008HierarchicalRCU
,Author="Paul E. McKenney"
,Title="Hierarchical {RCU}"
,month="November"
,day="3"
,year="2008"
,note="Available:
\url{http://lwn.net/Articles/305782/}
[Viewed November 6, 2008]"
,annotation="
RCU with combining-tree-based grace-period detection,
permitting it to handle thousands of CPUs.
"
}
@conference{PaulEMcKenney2009MaliciousURCU
,Author="Paul E. McKenney"
,Title="Using a Malicious User-Level {RCU} to Torture {RCU}-Based Algorithms"
,Booktitle="linux.conf.au 2009"
,month="January"
,year="2009"
,address="Hobart, Australia"
,note="Available:
\url{http://www.rdrop.com/users/paulmck/RCU/urcutorture.2009.01.22a.pdf}
[Viewed February 2, 2009]"
,annotation="
Realtime RCU and torture-testing RCU uses.
"
}
@unpublished{MathieuDesnoyers2009URCU
,Author="Mathieu Desnoyers"
,Title="[{RFC} git tree] Userspace {RCU} (urcu) for {Linux}"
,month="February"
,day="5"
,year="2009"
,note="Available:
\url{http://lkml.org/lkml/2009/2/5/572}
\url{git://lttng.org/userspace-rcu.git}
[Viewed February 20, 2009]"
,annotation="
Mathieu Desnoyers's user-space RCU implementation.
git://lttng.org/userspace-rcu.git
"
}
@unpublished{PaulEMcKenney2009BloatWatchRCU
,Author="Paul E. McKenney"
,Title="{RCU}: The {Bloatwatch} Edition"
,month="March"
,day="17"
,year="2009"
,note="Available:
\url{http://lwn.net/Articles/323929/}
[Viewed March 20, 2009]"
,annotation="
Uniprocessor assumptions allow simplified RCU implementation.
"
}
Documentation/RCU/UP.txt
浏览文件 @ 45bd00d3
......@@ -2,14 +2,13 @@ RCU on Uniprocessor Systems
A common misconception is that, on UP systems, the call_rcu() primitive
may immediately invoke its function, and that the synchronize_rcu()
primitive may return immediately. The basis of this misconception
may immediately invoke its function. The basis of this misconception
is that since there is only one CPU, it should not be necessary to
wait for anything else to get done, since there are no other CPUs for
anything else to be happening on. Although this approach will -sort- -of-
work a surprising amount of the time, it is a very bad idea in general.
This document presents three examples that demonstrate exactly how bad an
idea this is.
This document presents three examples that demonstrate exactly how bad
an idea this is.
Example 1: softirq Suicide
......@@ -82,11 +81,18 @@ Quick Quiz #2: What locking restriction must RCU callbacks respect?
Summary
Permitting call_rcu() to immediately invoke its arguments or permitting
synchronize_rcu() to immediately return breaks RCU, even on a UP system.
So do not do it! Even on a UP system, the RCU infrastructure -must-
respect grace periods, and -must- invoke callbacks from a known environment
in which no locks are held.
Permitting call_rcu() to immediately invoke its arguments breaks RCU,
even on a UP system. So do not do it! Even on a UP system, the RCU
infrastructure -must- respect grace periods, and -must- invoke callbacks
from a known environment in which no locks are held.
It -is- safe for synchronize_sched() and synchronize_rcu_bh() to return
immediately on an UP system. It is also safe for synchronize_rcu()
to return immediately on UP systems, except when running preemptable
RCU.
Quick Quiz #3: Why can't synchronize_rcu() return immediately on
UP systems running preemptable RCU?
Answer to Quick Quiz #1:
......@@ -117,3 +123,13 @@ Answer to Quick Quiz #2:
callbacks acquire locks directly. However, a great many RCU
callbacks do acquire locks -indirectly-, for example, via
the kfree() primitive.
Answer to Quick Quiz #3:
Why can't synchronize_rcu() return immediately on UP systems
running preemptable RCU?
Because some other task might have been preempted in the middle
of an RCU read-side critical section. If synchronize_rcu()
simply immediately returned, it would prematurely signal the
end of the grace period, which would come as a nasty shock to
that other thread when it started running again.
Documentation/RCU/checklist.txt
浏览文件 @ 45bd00d3
......@@ -11,7 +11,10 @@ over a rather long period of time, but improvements are always welcome!
structure is updated more than about 10% of the time, then
you should strongly consider some other approach, unless
detailed performance measurements show that RCU is nonetheless
the right tool for the job.
the right tool for the job. Yes, you might think of RCU
as simply cutting overhead off of the readers and imposing it
on the writers. That is exactly why normal uses of RCU will
do much more reading than updating.
Another exception is where performance is not an issue, and RCU
provides a simpler implementation. An example of this situation
......@@ -240,10 +243,11 @@ over a rather long period of time, but improvements are always welcome!
instead need to use synchronize_irq() or synchronize_sched().
12. Any lock acquired by an RCU callback must be acquired elsewhere
with irq disabled, e.g., via spin_lock_irqsave(). Failing to
disable irq on a given acquisition of that lock will result in
deadlock as soon as the RCU callback happens to interrupt that
acquisition's critical section.
with softirq disabled, e.g., via spin_lock_irqsave(),
spin_lock_bh(), etc. Failing to disable irq on a given
acquisition of that lock will result in deadlock as soon as the
RCU callback happens to interrupt that acquisition's critical
section.
13. RCU callbacks can be and are executed in parallel. In many cases,
the callback code simply wrappers around kfree(), so that this
......@@ -310,3 +314,9 @@ over a rather long period of time, but improvements are always welcome!
Because these primitives only wait for pre-existing readers,
it is the caller's responsibility to guarantee safety to
any subsequent readers.
16. The various RCU read-side primitives do -not- contain memory
barriers. The CPU (and in some cases, the compiler) is free
to reorder code into and out of RCU read-side critical sections.
It is the responsibility of the RCU update-side primitives to
deal with this.
Documentation/RCU/rcu.txt
浏览文件 @ 45bd00d3
......@@ -36,7 +36,7 @@ o How can the updater tell when a grace period has completed
executed in user mode, or executed in the idle loop, we can
safely free up that item.
Preemptible variants of RCU (CONFIG_PREEMPT_RCU) get the
Preemptible variants of RCU (CONFIG_TREE_PREEMPT_RCU) get the
same effect, but require that the readers manipulate CPU-local
counters. These counters allow limited types of blocking
within RCU read-side critical sections. SRCU also uses
......@@ -79,10 +79,10 @@ o I hear that RCU is patented? What is with that?
o I hear that RCU needs work in order to support realtime kernels?
This work is largely completed. Realtime-friendly RCU can be
enabled via the CONFIG_PREEMPT_RCU kernel configuration parameter.
However, work is in progress for enabling priority boosting of
preempted RCU read-side critical sections. This is needed if you
have CPU-bound realtime threads.
enabled via the CONFIG_TREE_PREEMPT_RCU kernel configuration
parameter. However, work is in progress for enabling priority
boosting of preempted RCU read-side critical sections. This is
needed if you have CPU-bound realtime threads.
o Where can I find more information on RCU?
......
Documentation/RCU/rcubarrier.txt
浏览文件 @ 45bd00d3
......@@ -170,6 +170,13 @@ module invokes call_rcu() from timers, you will need to first cancel all
the timers, and only then invoke rcu_barrier() to wait for any remaining
RCU callbacks to complete.
Of course, if you module uses call_rcu_bh(), you will need to invoke
rcu_barrier_bh() before unloading. Similarly, if your module uses
call_rcu_sched(), you will need to invoke rcu_barrier_sched() before
unloading. If your module uses call_rcu(), call_rcu_bh(), -and-
call_rcu_sched(), then you will need to invoke each of rcu_barrier(),
rcu_barrier_bh(), and rcu_barrier_sched().
Implementing rcu_barrier()
......
Documentation/RCU/torture.txt
浏览文件 @ 45bd00d3
......@@ -76,8 +76,10 @@ torture_type The type of RCU to test: "rcu" for the rcu_read_lock() API,
"rcu_sync" for rcu_read_lock() with synchronous reclamation,
"rcu_bh" for the rcu_read_lock_bh() API, "rcu_bh_sync" for
rcu_read_lock_bh() with synchronous reclamation, "srcu" for
the "srcu_read_lock()" API, and "sched" for the use of
preempt_disable() together with synchronize_sched().
the "srcu_read_lock()" API, "sched" for the use of
preempt_disable() together with synchronize_sched(),
and "sched_expedited" for the use of preempt_disable()
with synchronize_sched_expedited().
verbose Enable debug printk()s. Default is disabled.
......@@ -162,6 +164,23 @@ of the "old" and "current" counters for the corresponding CPU. The
"idx" value maps the "old" and "current" values to the underlying array,
and is useful for debugging.
Similarly, sched_expedited RCU provides the following:
sched_expedited-torture: rtc: d0000000016c1880 ver: 1090796 tfle: 0 rta: 1090796 rtaf: 0 rtf: 1090787 rtmbe: 0 nt: 27713319
sched_expedited-torture: Reader Pipe: 12660320201 95875 0 0 0 0 0 0 0 0 0
sched_expedited-torture: Reader Batch: 12660424885 0 0 0 0 0 0 0 0 0 0
sched_expedited-torture: Free-Block Circulation: 1090795 1090795 1090794 1090793 1090792 1090791 1090790 1090789 1090788 1090787 0
state: -1 / 0:0 3:0 4:0
As before, the first four lines are similar to those for RCU.
The last line shows the task-migration state. The first number is
-1 if synchronize_sched_expedited() is idle, -2 if in the process of
posting wakeups to the migration kthreads, and N when waiting on CPU N.
Each of the colon-separated fields following the "/" is a CPU:state pair.
Valid states are "0" for idle, "1" for waiting for quiescent state,
"2" for passed through quiescent state, and "3" when a race with a
CPU-hotplug event forces use of the synchronize_sched() primitive.
USAGE
......
Documentation/RCU/trace.txt
浏览文件 @ 45bd00d3
......@@ -191,8 +191,7 @@ rcu/rcuhier (which displays the struct rcu_node hierarchy).
The output of "cat rcu/rcudata" looks as follows:
rcu:
rcu:
rcu_sched:
0 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=10951/1 dn=0 df=1101 of=0 ri=36 ql=0 b=10
1 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=16117/1 dn=0 df=1015 of=0 ri=0 ql=0 b=10
2 c=17829 g=17829 pq=1 pqc=17829 qp=0 dt=1445/1 dn=0 df=1839 of=0 ri=0 ql=0 b=10
......@@ -306,7 +305,7 @@ comma-separated-variable spreadsheet format.
The output of "cat rcu/rcugp" looks as follows:
rcu: completed=33062 gpnum=33063
rcu_sched: completed=33062 gpnum=33063
rcu_bh: completed=464 gpnum=464
Again, this output is for both "rcu" and "rcu_bh". The fields are
......@@ -413,7 +412,7 @@ o Each element of the form "1/1 0:127 ^0" represents one struct
The output of "cat rcu/rcu_pending" looks as follows:
rcu:
rcu_sched:
0 np=255892 qsp=53936 cbr=0 cng=14417 gpc=10033 gps=24320 nf=6445 nn=146741
1 np=261224 qsp=54638 cbr=0 cng=25723 gpc=16310 gps=2849 nf=5912 nn=155792
2 np=237496 qsp=49664 cbr=0 cng=2762 gpc=45478 gps=1762 nf=1201 nn=136629
......
Documentation/RCU/whatisRCU.txt
浏览文件 @ 45bd00d3
......@@ -136,10 +136,10 @@ rcu_read_lock()
Used by a reader to inform the reclaimer that the reader is
entering an RCU read-side critical section. It is illegal
to block while in an RCU read-side critical section, though
kernels built with CONFIG_PREEMPT_RCU can preempt RCU read-side
critical sections. Any RCU-protected data structure accessed
during an RCU read-side critical section is guaranteed to remain
unreclaimed for the full duration of that critical section.
kernels built with CONFIG_TREE_PREEMPT_RCU can preempt RCU
read-side critical sections. Any RCU-protected data structure
accessed during an RCU read-side critical section is guaranteed to
remain unreclaimed for the full duration of that critical section.
Reference counts may be used in conjunction with RCU to maintain
longer-term references to data structures.
......@@ -785,6 +785,7 @@ RCU pointer/list traversal:
rcu_dereference
list_for_each_entry_rcu
hlist_for_each_entry_rcu
hlist_nulls_for_each_entry_rcu
list_for_each_continue_rcu (to be deprecated in favor of new
list_for_each_entry_continue_rcu)
......@@ -807,19 +808,23 @@ RCU: Critical sections Grace period Barrier
rcu_read_lock synchronize_net rcu_barrier
rcu_read_unlock synchronize_rcu
synchronize_rcu_expedited
call_rcu
bh: Critical sections Grace period Barrier
rcu_read_lock_bh call_rcu_bh rcu_barrier_bh
rcu_read_unlock_bh
rcu_read_unlock_bh synchronize_rcu_bh
synchronize_rcu_bh_expedited
sched: Critical sections Grace period Barrier
[preempt_disable] synchronize_sched rcu_barrier_sched
[and friends] call_rcu_sched
rcu_read_lock_sched synchronize_sched rcu_barrier_sched
rcu_read_unlock_sched call_rcu_sched
[preempt_disable] synchronize_sched_expedited
[and friends]
SRCU: Critical sections Grace period Barrier
......@@ -827,6 +832,9 @@ SRCU: Critical sections Grace period Barrier
srcu_read_lock synchronize_srcu N/A
srcu_read_unlock
SRCU: Initialization/cleanup
init_srcu_struct
cleanup_srcu_struct
See the comment headers in the source code (or the docbook generated
from them) for more information.
......
Documentation/arm/SA1100/ADSBitsy
浏览文件 @ 45bd00d3
......@@ -40,4 +40,4 @@ Notes:
mode, the timing is off so the image is corrupted. This will be
fixed soon.
Any contribution can be sent to nico@cam.org and will be greatly welcome!
Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
Documentation/arm/SA1100/Assabet
浏览文件 @ 45bd00d3
......@@ -240,7 +240,7 @@ Then, rebooting the Assabet is just a matter of waiting for the login prompt.
Nicolas Pitre
nico@cam.org
nico@fluxnic.net
June 12, 2001
......
Documentation/arm/SA1100/Brutus
浏览文件 @ 45bd00d3
......@@ -60,7 +60,7 @@ little modifications.
Any contribution is welcome.
Please send patches to nico@cam.org
Please send patches to nico@fluxnic.net
Have Fun !
Documentation/arm/SA1100/GraphicsClient
浏览文件 @ 45bd00d3
......@@ -4,7 +4,7 @@ For more details, contact Applied Data Systems or see
http://www.applieddata.net/products.html
The original Linux support for this product has been provided by
Nicolas Pitre <nico@cam.org>. Continued development work by
Nicolas Pitre <nico@fluxnic.net>. Continued development work by
Woojung Huh <whuh@applieddata.net>
It's currently possible to mount a root filesystem via NFS providing a
......@@ -94,5 +94,5 @@ Notes:
mode, the timing is off so the image is corrupted. This will be
fixed soon.
Any contribution can be sent to nico@cam.org and will be greatly welcome!
Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
Documentation/arm/SA1100/GraphicsMaster
浏览文件 @ 45bd00d3
......@@ -4,7 +4,7 @@ For more details, contact Applied Data Systems or see
http://www.applieddata.net/products.html
The original Linux support for this product has been provided by
Nicolas Pitre <nico@cam.org>. Continued development work by
Nicolas Pitre <nico@fluxnic.net>. Continued development work by
Woojung Huh <whuh@applieddata.net>
Use 'make graphicsmaster_config' before any 'make config'.
......@@ -50,4 +50,4 @@ Notes:
mode, the timing is off so the image is corrupted. This will be
fixed soon.
Any contribution can be sent to nico@cam.org and will be greatly welcome!
Any contribution can be sent to nico@fluxnic.net and will be greatly welcome!
Documentation/arm/SA1100/Victor
浏览文件 @ 45bd00d3
......@@ -9,7 +9,7 @@ Of course Victor is using Linux as its main operating system.
The Victor implementation for Linux is maintained by Nicolas Pitre:
nico@visuaide.com
nico@cam.org
nico@fluxnic.net
For any comments, please feel free to contact me through the above
addresses.
......
Documentation/arm/Samsung-S3C24XX/CPUfreq.txt 0 → 100644
浏览文件 @ 45bd00d3
S3C24XX CPUfreq support
=======================
Introduction
------------
The S3C24XX series support a number of power saving systems, such as
the ability to change the core, memory and peripheral operating
frequencies. The core control is exported via the CPUFreq driver
which has a number of different manual or automatic controls over the
rate the core is running at.
There are two forms of the driver depending on the specific CPU and
how the clocks are arranged. The first implementation used as single
PLL to feed the ARM, memory and peripherals via a series of dividers
and muxes and this is the implementation that is documented here. A
newer version where there is a seperate PLL and clock divider for the
ARM core is available as a seperate driver.
Layout
------
The code core manages the CPU specific drivers, any data that they
need to register and the interface to the generic drivers/cpufreq
system. Each CPU registers a driver to control the PLL, clock dividers
and anything else associated with it. Any board that wants to use this
framework needs to supply at least basic details of what is required.
The core registers with drivers/cpufreq at init time if all the data
necessary has been supplied.
CPU support
-----------
The support for each CPU depends on the facilities provided by the
SoC and the driver as each device has different PLL and clock chains
associated with it.
Slow Mode
---------
The SLOW mode where the PLL is turned off altogether and the
system is fed by the external crystal input is currently not
supported.
sysfs
-----
The core code exports extra information via sysfs in the directory
devices/system/cpu/cpu0/arch-freq.
Board Support
-------------
Each board that wants to use the cpufreq code must register some basic
information with the core driver to provide information about what the
board requires and any restrictions being placed on it.
The board needs to supply information about whether it needs the IO bank
timings changing, any maximum frequency limits and information about the
SDRAM refresh rate.
Document Author
---------------
Ben Dooks, Copyright 2009 Simtec Electronics
Licensed under GPLv2
Documentation/btmrvl.txt 0 → 100644
浏览文件 @ 45bd00d3
=======================================================================
README for btmrvl driver
=======================================================================
All commands are used via debugfs interface.
=====================
Set/get driver configurations:
Path: /debug/btmrvl/config/
gpiogap=[n]
hscfgcmd
These commands are used to configure the host sleep parameters.
bit 8:0 -- Gap
bit 16:8 -- GPIO
where GPIO is the pin number of GPIO used to wake up the host.
It could be any valid GPIO pin# (e.g. 0-7) or 0xff (SDIO interface
wakeup will be used instead).
where Gap is the gap in milli seconds between wakeup signal and
wakeup event, or 0xff for special host sleep setting.
Usage:
# Use SDIO interface to wake up the host and set GAP to 0x80:
echo 0xff80 > /debug/btmrvl/config/gpiogap
echo 1 > /debug/btmrvl/config/hscfgcmd
# Use GPIO pin #3 to wake up the host and set GAP to 0xff:
echo 0x03ff > /debug/btmrvl/config/gpiogap
echo 1 > /debug/btmrvl/config/hscfgcmd
psmode=[n]
pscmd
These commands are used to enable/disable auto sleep mode
where the option is:
1 -- Enable auto sleep mode
0 -- Disable auto sleep mode
Usage:
# Enable auto sleep mode
echo 1 > /debug/btmrvl/config/psmode
echo 1 > /debug/btmrvl/config/pscmd
# Disable auto sleep mode
echo 0 > /debug/btmrvl/config/psmode
echo 1 > /debug/btmrvl/config/pscmd
hsmode=[n]
hscmd
These commands are used to enable host sleep or wake up firmware
where the option is:
1 -- Enable host sleep
0 -- Wake up firmware
Usage:
# Enable host sleep
echo 1 > /debug/btmrvl/config/hsmode
echo 1 > /debug/btmrvl/config/hscmd
# Wake up firmware
echo 0 > /debug/btmrvl/config/hsmode
echo 1 > /debug/btmrvl/config/hscmd
======================
Get driver status:
Path: /debug/btmrvl/status/
Usage:
cat /debug/btmrvl/status/<args>
where the args are:
curpsmode
This command displays current auto sleep status.
psstate
This command display the power save state.
hsstate
This command display the host sleep state.
txdnldrdy
This command displays the value of Tx download ready flag.
=====================
Use hcitool to issue raw hci command, refer to hcitool manual
Usage: Hcitool cmd <ogf> <ocf> [Parameters]
Interface Control Command
hcitool cmd 0x3f 0x5b 0xf5 0x01 0x00 --Enable All interface
hcitool cmd 0x3f 0x5b 0xf5 0x01 0x01 --Enable Wlan interface
hcitool cmd 0x3f 0x5b 0xf5 0x01 0x02 --Enable BT interface
hcitool cmd 0x3f 0x5b 0xf5 0x00 0x00 --Disable All interface
hcitool cmd 0x3f 0x5b 0xf5 0x00 0x01 --Disable Wlan interface
hcitool cmd 0x3f 0x5b 0xf5 0x00 0x02 --Disable BT interface
=======================================================================
SD8688 firmware:
/lib/firmware/sd8688_helper.bin
/lib/firmware/sd8688.bin
The images can be downloaded from:
git.infradead.org/users/dwmw2/linux-firmware.git/libertas/
Documentation/connector/Makefile
浏览文件 @ 45bd00d3
......@@ -9,3 +9,8 @@ hostprogs-y := ucon
always := $(hostprogs-y)
HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
all: modules
modules clean:
$(MAKE) -C ../.. SUBDIRS=$(PWD) $@
Documentation/connector/cn_test.c
浏览文件 @ 45bd00d3
......@@ -19,6 +19,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define pr_fmt(fmt) "cn_test: " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
......@@ -27,18 +29,17 @@
#include <linux/connector.h>
static struct cb_id cn_test_id = { 0x123, 0x456 };
static struct cb_id cn_test_id = { CN_NETLINK_USERS + 3, 0x456 };
static char cn_test_name[] = "cn_test";
static struct sock *nls;
static struct timer_list cn_test_timer;
void cn_test_callback(void *data)
static void cn_test_callback(struct cn_msg *msg)
{
struct cn_msg *msg = (struct cn_msg *)data;
printk("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n",
__func__, jiffies, msg->id.idx, msg->id.val,
msg->seq, msg->ack, msg->len, (char *)msg->data);
pr_info("%s: %lu: idx=%x, val=%x, seq=%u, ack=%u, len=%d: %s.\n",
__func__, jiffies, msg->id.idx, msg->id.val,
msg->seq, msg->ack, msg->len,
msg->len ? (char *)msg->data : "");
}
/*
......@@ -63,9 +64,7 @@ static int cn_test_want_notify(void)
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb) {
printk(KERN_ERR "Failed to allocate new skb with size=%u.\n",
size);
pr_err("failed to allocate new skb with size=%u\n", size);
return -ENOMEM;
}
......@@ -114,12 +113,12 @@ static int cn_test_want_notify(void)
//netlink_broadcast(nls, skb, 0, ctl->group, GFP_ATOMIC);
netlink_unicast(nls, skb, 0, 0);
printk(KERN_INFO "Request was sent. Group=0x%x.\n", ctl->group);
pr_info("request was sent: group=0x%x\n", ctl->group);
return 0;
nlmsg_failure:
printk(KERN_ERR "Failed to send %u.%u\n", msg->seq, msg->ack);
pr_err("failed to send %u.%u\n", msg->seq, msg->ack);
kfree_skb(skb);
return -EINVAL;
}
......@@ -131,6 +130,8 @@ static void cn_test_timer_func(unsigned long __data)
struct cn_msg *m;
char data[32];
pr_debug("%s: timer fired with data %lu\n", __func__, __data);
m = kzalloc(sizeof(*m) + sizeof(data), GFP_ATOMIC);
if (m) {
......@@ -150,7 +151,7 @@ static void cn_test_timer_func(unsigned long __data)
cn_test_timer_counter++;
mod_timer(&cn_test_timer, jiffies + HZ);
mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
}
static int cn_test_init(void)
......@@ -168,8 +169,10 @@ static int cn_test_init(void)
}
setup_timer(&cn_test_timer, cn_test_timer_func, 0);
cn_test_timer.expires = jiffies + HZ;
add_timer(&cn_test_timer);
mod_timer(&cn_test_timer, jiffies + msecs_to_jiffies(1000));
pr_info("initialized with id={%u.%u}\n",
cn_test_id.idx, cn_test_id.val);
return 0;
......
Documentation/connector/connector.txt
浏览文件 @ 45bd00d3
......@@ -5,10 +5,10 @@ Kernel Connector.
Kernel connector - new netlink based userspace <-> kernel space easy
to use communication module.
Connector driver adds possibility to connect various agents using
netlink based network. One must register callback and
identifier. When driver receives special netlink message with
appropriate identifier, appropriate callback will be called.
The Connector driver makes it easy to connect various agents using a
netlink based network. One must register a callback and an identifier.
When the driver receives a special netlink message with the appropriate
identifier, the appropriate callback will be called.
From the userspace point of view it's quite straightforward:
......@@ -17,10 +17,10 @@ From the userspace point of view it's quite straightforward:
send();
recv();
But if kernelspace want to use full power of such connections, driver
writer must create special sockets, must know about struct sk_buff
handling... Connector allows any kernelspace agents to use netlink
based networking for inter-process communication in a significantly
But if kernelspace wants to use the full power of such connections, the
driver writer must create special sockets, must know about struct sk_buff
handling, etc... The Connector driver allows any kernelspace agents to use
netlink based networking for inter-process communication in a significantly
easier way:
int cn_add_callback(struct cb_id *id, char *name, void (*callback) (void *));
......@@ -32,15 +32,15 @@ struct cb_id
__u32 val;
};
idx and val are unique identifiers which must be registered in
connector.h for in-kernel usage. void (*callback) (void *) - is a
callback function which will be called when message with above idx.val
will be received by connector core. Argument for that function must
idx and val are unique identifiers which must be registered in the
connector.h header for in-kernel usage. void (*callback) (void *) is a
callback function which will be called when a message with above idx.val
is received by the connector core. The argument for that function must
be dereferenced to struct cn_msg *.
struct cn_msg
{
struct cb_id id;
struct cb_id id;
__u32 seq;
__u32 ack;
......@@ -55,92 +55,95 @@ Connector interfaces.
int cn_add_callback(struct cb_id *id, char *name, void (*callback) (void *));
Registers new callback with connector core.
Registers new callback with connector core.
struct cb_id *id - unique connector's user identifier.
It must be registered in connector.h for legal in-kernel users.
char *name - connector's callback symbolic name.
void (*callback) (void *) - connector's callback.
struct cb_id *id - unique connector's user identifier.
It must be registered in connector.h for legal in-kernel users.
char *name - connector's callback symbolic name.
void (*callback) (void *) - connector's callback.
Argument must be dereferenced to struct cn_msg *.
void cn_del_callback(struct cb_id *id);
Unregisters new callback with connector core.
Unregisters new callback with connector core.
struct cb_id *id - unique connector's user identifier.
struct cb_id *id - unique connector's user identifier.
int cn_netlink_send(struct cn_msg *msg, u32 __groups, int gfp_mask);
Sends message to the specified groups. It can be safely called from
softirq context, but may silently fail under strong memory pressure.
If there are no listeners for given group -ESRCH can be returned.
Sends message to the specified groups. It can be safely called from
softirq context, but may silently fail under strong memory pressure.
If there are no listeners for given group -ESRCH can be returned.
struct cn_msg * - message header(with attached data).
u32 __group - destination group.
struct cn_msg * - message header(with attached data).
u32 __group - destination group.
If __group is zero, then appropriate group will
be searched through all registered connector users,
and message will be delivered to the group which was
created for user with the same ID as in msg.
If __group is not zero, then message will be delivered
to the specified group.
int gfp_mask - GFP mask.
int gfp_mask - GFP mask.
Note: When registering new callback user, connector core assigns
netlink group to the user which is equal to it's id.idx.
Note: When registering new callback user, connector core assigns
netlink group to the user which is equal to it's id.idx.
/*****************************************/
Protocol description.
/*****************************************/
Current offers transport layer with fixed header. Recommended
protocol which uses such header is following:
The current framework offers a transport layer with fixed headers. The
recommended protocol which uses such a header is as following:
msg->seq and msg->ack are used to determine message genealogy. When
someone sends message it puts there locally unique sequence and random
acknowledge numbers. Sequence number may be copied into
someone sends a message, they use a locally unique sequence and random
acknowledge number. The sequence number may be copied into
nlmsghdr->nlmsg_seq too.
Sequence number is incremented with each message to be sent.
The sequence number is incremented with each message sent.
If we expect reply to our message, then sequence number in received
message MUST be the same as in original message, and acknowledge
number MUST be the same + 1.
If you expect a reply to the message, then the sequence number in the
received message MUST be the same as in the original message, and the
acknowledge number MUST be the same + 1.
If we receive message and it's sequence number is not equal to one we
are expecting, then it is new message. If we receive message and it's
sequence number is the same as one we are expecting, but it's
acknowledge is not equal acknowledge number in original message + 1,
then it is new message.
If we receive a message and its sequence number is not equal to one we
are expecting, then it is a new message. If we receive a message and
its sequence number is the same as one we are expecting, but its
acknowledge is not equal to the acknowledge number in the original
message + 1, then it is a new message.
Obviously, protocol header contains above id.
Obviously, the protocol header contains the above id.
connector allows event notification in the following form: kernel
The connector allows event notification in the following form: kernel
driver or userspace process can ask connector to notify it when
selected id's will be turned on or off(registered or unregistered it's
callback). It is done by sending special command to connector
driver(it also registers itself with id={-1, -1}).
selected ids will be turned on or off (registered or unregistered its
callback). It is done by sending a special command to the connector
driver (it also registers itself with id={-1, -1}).
As example of usage Documentation/connector now contains cn_test.c -
testing module which uses connector to request notification and to
send messages.
As example of this usage can be found in the cn_test.c module which
uses the connector to request notification and to send messages.
/*****************************************/
Reliability.
/*****************************************/
Netlink itself is not reliable protocol, that means that messages can
Netlink itself is not a reliable protocol. That means that messages can
be lost due to memory pressure or process' receiving queue overflowed,
so caller is warned must be prepared. That is why struct cn_msg [main
connector's message header] contains u32 seq and u32 ack fields.
so caller is warned that it must be prepared. That is why the struct
cn_msg [main connector's message header] contains u32 seq and u32 ack
fields.
/*****************************************/
Userspace usage.
/*****************************************/
2.6.14 has a new netlink socket implementation, which by default does not
allow to send data to netlink groups other than 1.
So, if to use netlink socket (for example using connector)
with different group number userspace application must subscribe to
that group. It can be achieved by following pseudocode:
allow people to send data to netlink groups other than 1.
So, if you wish to use a netlink socket (for example using connector)
with a different group number, the userspace application must subscribe to
that group first. It can be achieved by the following pseudocode:
s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
......@@ -160,8 +163,8 @@ if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) {
}
Where 270 above is SOL_NETLINK, and 1 is a NETLINK_ADD_MEMBERSHIP socket
option. To drop multicast subscription one should call above socket option
with NETLINK_DROP_MEMBERSHIP parameter which is defined as 0.
option. To drop a multicast subscription, one should call the above socket
option with the NETLINK_DROP_MEMBERSHIP parameter which is defined as 0.
2.6.14 netlink code only allows to select a group which is less or equal to
the maximum group number, which is used at netlink_kernel_create() time.
......
Documentation/connector/ucon.c
浏览文件 @ 45bd00d3
......@@ -30,18 +30,24 @@
#include <arpa/inet.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <getopt.h>
#include <linux/connector.h>
#define DEBUG
#define NETLINK_CONNECTOR 11
/* Hopefully your userspace connector.h matches this kernel */
#define CN_TEST_IDX CN_NETLINK_USERS + 3
#define CN_TEST_VAL 0x456
#ifdef DEBUG
#define ulog(f, a...) fprintf(stdout, f, ##a)
#else
......@@ -83,6 +89,25 @@ static int netlink_send(int s, struct cn_msg *msg)
return err;
}
static void usage(void)
{
printf(
"Usage: ucon [options] [output file]\n"
"\n"
"\t-h\tthis help screen\n"
"\t-s\tsend buffers to the test module\n"
"\n"
"The default behavior of ucon is to subscribe to the test module\n"
"and wait for state messages. Any ones received are dumped to the\n"
"specified output file (or stdout). The test module is assumed to\n"
"have an id of {%u.%u}\n"
"\n"
"If you get no output, then verify the cn_test module id matches\n"
"the expected id above.\n"
, CN_TEST_IDX, CN_TEST_VAL
);
}
int main(int argc, char *argv[])
{
int s;
......@@ -94,17 +119,34 @@ int main(int argc, char *argv[])
FILE *out;
time_t tm;
struct pollfd pfd;
bool send_msgs = false;
if (argc < 2)
out = stdout;
else {
out = fopen(argv[1], "a+");
while ((s = getopt(argc, argv, "hs")) != -1) {
switch (s) {
case 's':
send_msgs = true;
break;
case 'h':
usage();
return 0;
default:
/* getopt() outputs an error for us */
usage();
return 1;
}
}
if (argc != optind) {
out = fopen(argv[optind], "a+");
if (!out) {
ulog("Unable to open %s for writing: %s\n",
argv[1], strerror(errno));
out = stdout;
}
}
} else
out = stdout;
memset(buf, 0, sizeof(buf));
......@@ -115,9 +157,11 @@ int main(int argc, char *argv[])
}
l_local.nl_family = AF_NETLINK;
l_local.nl_groups = 0x123; /* bitmask of requested groups */
l_local.nl_groups = -1; /* bitmask of requested groups */
l_local.nl_pid = 0;
ulog("subscribing to %u.%u\n", CN_TEST_IDX, CN_TEST_VAL);
if (bind(s, (struct sockaddr *)&l_local, sizeof(struct sockaddr_nl)) == -1) {
perror("bind");
close(s);
......@@ -130,15 +174,15 @@ int main(int argc, char *argv[])
setsockopt(s, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &on, sizeof(on));
}
#endif
if (0) {
if (send_msgs) {
int i, j;
memset(buf, 0, sizeof(buf));
data = (struct cn_msg *)buf;
data->id.idx = 0x123;
data->id.val = 0x456;
data->id.idx = CN_TEST_IDX;
data->id.val = CN_TEST_VAL;
data->seq = seq++;
data->ack = 0;
data->len = 0;
......
Documentation/feature-removal-schedule.txt
浏览文件 @ 45bd00d3
......@@ -6,6 +6,35 @@ be removed from this file.
---------------------------
What: PRISM54
When: 2.6.34
Why: prism54 FullMAC PCI / Cardbus devices used to be supported only by the
prism54 wireless driver. After Intersil stopped selling these
devices in preference for the newer more flexible SoftMAC devices
a SoftMAC device driver was required and prism54 did not support
them. The p54pci driver now exists and has been present in the kernel for
a while. This driver supports both SoftMAC devices and FullMAC devices.
The main difference between these devices was the amount of memory which
could be used for the firmware. The SoftMAC devices support a smaller
amount of memory. Because of this the SoftMAC firmware fits into FullMAC
devices's memory. p54pci supports not only PCI / Cardbus but also USB
and SPI. Since p54pci supports all devices prism54 supports
you will have a conflict. I'm not quite sure how distributions are
handling this conflict right now. prism54 was kept around due to
claims users may experience issues when using the SoftMAC driver.
Time has passed users have not reported issues. If you use prism54
and for whatever reason you cannot use p54pci please let us know!
E-mail us at: linux-wireless@vger.kernel.org
For more information see the p54 wiki page:
http://wireless.kernel.org/en/users/Drivers/p54
Who: Luis R. Rodriguez <lrodriguez@atheros.com>
---------------------------
What: IRQF_SAMPLE_RANDOM
Check: IRQF_SAMPLE_RANDOM
When: July 2009
......@@ -206,24 +235,6 @@ Who: Len Brown <len.brown@intel.com>
---------------------------
What: libata spindown skipping and warning
When: Dec 2008
Why: Some halt(8) implementations synchronize caches for and spin
down libata disks because libata didn't use to spin down disk on
system halt (only synchronized caches).
Spin down on system halt is now implemented. sysfs node
/sys/class/scsi_disk/h:c:i:l/manage_start_stop is present if
spin down support is available.
Because issuing spin down command to an already spun down disk
makes some disks spin up just to spin down again, libata tracks
device spindown status to skip the extra spindown command and
warn about it.
This is to give userspace tools the time to get updated and will
be removed after userspace is reasonably updated.
Who: Tejun Heo <htejun@gmail.com>
---------------------------
What: i386/x86_64 bzImage symlinks
When: April 2010
......@@ -235,31 +246,6 @@ Who: Thomas Gleixner <tglx@linutronix.de>
---------------------------
What (Why):
- include/linux/netfilter_ipv4/ipt_TOS.h ipt_tos.h header files
(superseded by xt_TOS/xt_tos target & match)
- "forwarding" header files like ipt_mac.h in
include/linux/netfilter_ipv4/ and include/linux/netfilter_ipv6/
- xt_CONNMARK match revision 0
(superseded by xt_CONNMARK match revision 1)
- xt_MARK target revisions 0 and 1
(superseded by xt_MARK match revision 2)
- xt_connmark match revision 0
(superseded by xt_connmark match revision 1)
- xt_conntrack match revision 0
(superseded by xt_conntrack match revision 1)
- xt_iprange match revision 0,
include/linux/netfilter_ipv4/ipt_iprange.h
(superseded by xt_iprange match revision 1)
- xt_mark match revision 0
(superseded by xt_mark match revision 1)
- xt_recent: the old ipt_recent proc dir
(superseded by /proc/net/xt_recent)
......@@ -394,15 +380,6 @@ Who: Thomas Gleixner <tglx@linutronix.de>
-----------------------------
What: obsolete generic irq defines and typedefs
When: 2.6.30
Why: The defines and typedefs (hw_interrupt_type, no_irq_type, irq_desc_t)
have been kept around for migration reasons. After more than two years
it's time to remove them finally
Who: Thomas Gleixner <tglx@linutronix.de>
---------------------------
What: fakephp and associated sysfs files in /sys/bus/pci/slots/
When: 2011
Why: In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to
......@@ -468,3 +445,27 @@ Why: cpu_policy_rwsem has a new cleaner definition making it local to
cpufreq core and contained inside cpufreq.c. Other dependent
drivers should not use it in order to safely avoid lockdep issues.
Who: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
----------------------------
What: sound-slot/service-* module aliases and related clutters in
sound/sound_core.c
When: August 2010
Why: OSS sound_core grabs all legacy minors (0-255) of SOUND_MAJOR
(14) and requests modules using custom sound-slot/service-*
module aliases. The only benefit of doing this is allowing
use of custom module aliases which might as well be considered
a bug at this point. This preemptive claiming prevents
alternative OSS implementations.
Till the feature is removed, the kernel will be requesting
both sound-slot/service-* and the standard char-major-* module
aliases and allow turning off the pre-claiming selectively via
CONFIG_SOUND_OSS_CORE_PRECLAIM and soundcore.preclaim_oss
kernel parameter.
After the transition phase is complete, both the custom module
aliases and switches to disable it will go away. This removal
will also allow making ALSA OSS emulation independent of
sound_core. The dependency will be broken then too.
Who: Tejun Heo <tj@kernel.org>
Documentation/filesystems/gfs2-uevents.txt 0 → 100644
浏览文件 @ 45bd00d3
uevents and GFS2
==================
During the lifetime of a GFS2 mount, a number of uevents are generated.
This document explains what the events are and what they are used
for (by gfs_controld in gfs2-utils).
A list of GFS2 uevents
-----------------------
1. ADD
The ADD event occurs at mount time. It will always be the first
uevent generated by the newly created filesystem. If the mount
is successful, an ONLINE uevent will follow. If it is not successful
then a REMOVE uevent will follow.
The ADD uevent has two environment variables: SPECTATOR=[0|1]
and RDONLY=[0|1] that specify the spectator status (a read-only mount
with no journal assigned), and read-only (with journal assigned) status
of the filesystem respectively.
2. ONLINE
The ONLINE uevent is generated after a successful mount or remount. It
has the same environment variables as the ADD uevent. The ONLINE
uevent, along with the two environment variables for spectator and
RDONLY are a relatively recent addition (2.6.32-rc+) and will not
be generated by older kernels.
3. CHANGE
The CHANGE uevent is used in two places. One is when reporting the
successful mount of the filesystem by the first node (FIRSTMOUNT=Done).
This is used as a signal by gfs_controld that it is then ok for other
nodes in the cluster to mount the filesystem.
The other CHANGE uevent is used to inform of the completion
of journal recovery for one of the filesystems journals. It has
two environment variables, JID= which specifies the journal id which
has just been recovered, and RECOVERY=[Done|Failed] to indicate the
success (or otherwise) of the operation. These uevents are generated
for every journal recovered, whether it is during the initial mount
process or as the result of gfs_controld requesting a specific journal
recovery via the /sys/fs/gfs2/<fsname>/lock_module/recovery file.
Because the CHANGE uevent was used (in early versions of gfs_controld)
without checking the environment variables to discover the state, we
cannot add any more functions to it without running the risk of
someone using an older version of the user tools and breaking their
cluster. For this reason the ONLINE uevent was used when adding a new
uevent for a successful mount or remount.
4. OFFLINE
The OFFLINE uevent is only generated due to filesystem errors and is used
as part of the "withdraw" mechanism. Currently this doesn't give any
information about what the error is, which is something that needs to
be fixed.
5. REMOVE
The REMOVE uevent is generated at the end of an unsuccessful mount
or at the end of a umount of the filesystem. All REMOVE uevents will
have been preceeded by at least an ADD uevent for the same fileystem,
and unlike the other uevents is generated automatically by the kernel's
kobject subsystem.
Information common to all GFS2 uevents (uevent environment variables)
----------------------------------------------------------------------
1. LOCKTABLE=
The LOCKTABLE is a string, as supplied on the mount command
line (locktable=) or via fstab. It is used as a filesystem label
as well as providing the information for a lock_dlm mount to be
able to join the cluster.
2. LOCKPROTO=
The LOCKPROTO is a string, and its value depends on what is set
on the mount command line, or via fstab. It will be either
lock_nolock or lock_dlm. In the future other lock managers
may be supported.
3. JOURNALID=
If a journal is in use by the filesystem (journals are not
assigned for spectator mounts) then this will give the
numeric journal id in all GFS2 uevents.
4. UUID=
With recent versions of gfs2-utils, mkfs.gfs2 writes a UUID
into the filesystem superblock. If it exists, this will
be included in every uevent relating to the filesystem.
Documentation/filesystems/nfs.txt 0 → 100644
浏览文件 @ 45bd00d3
The NFS client
==============
The NFS version 2 protocol was first documented in RFC1094 (March 1989).
Since then two more major releases of NFS have been published, with NFSv3
being documented in RFC1813 (June 1995), and NFSv4 in RFC3530 (April
2003).
The Linux NFS client currently supports all the above published versions,
and work is in progress on adding support for minor version 1 of the NFSv4
protocol.
The purpose of this document is to provide information on some of the
upcall interfaces that are used in order to provide the NFS client with
some of the information that it requires in order to fully comply with
the NFS spec.
The DNS resolver
================
NFSv4 allows for one server to refer the NFS client to data that has been
migrated onto another server by means of the special "fs_locations"
attribute. See
http://tools.ietf.org/html/rfc3530#section-6
and
http://tools.ietf.org/html/draft-ietf-nfsv4-referrals-00
The fs_locations information can take the form of either an ip address and
a path, or a DNS hostname and a path. The latter requires the NFS client to
do a DNS lookup in order to mount the new volume, and hence the need for an
upcall to allow userland to provide this service.
Assuming that the user has the 'rpc_pipefs' filesystem mounted in the usual
/var/lib/nfs/rpc_pipefs, the upcall consists of the following steps:
(1) The process checks the dns_resolve cache to see if it contains a
valid entry. If so, it returns that entry and exits.
(2) If no valid entry exists, the helper script '/sbin/nfs_cache_getent'
(may be changed using the 'nfs.cache_getent' kernel boot parameter)
is run, with two arguments:
- the cache name, "dns_resolve"
- the hostname to resolve
(3) After looking up the corresponding ip address, the helper script
writes the result into the rpc_pipefs pseudo-file
'/var/lib/nfs/rpc_pipefs/cache/dns_resolve/channel'
in the following (text) format:
"<ip address> <hostname> <ttl>\n"
Where <ip address> is in the usual IPv4 (123.456.78.90) or IPv6
(ffee:ddcc:bbaa:9988:7766:5544:3322:1100, ffee::1100, ...) format.
<hostname> is identical to the second argument of the helper
script, and <ttl> is the 'time to live' of this cache entry (in
units of seconds).
Note: If <ip address> is invalid, say the string "0", then a negative
entry is created, which will cause the kernel to treat the hostname
as having no valid DNS translation.
A basic sample /sbin/nfs_cache_getent
=====================================
#!/bin/bash
#
ttl=600
#
cut=/usr/bin/cut
getent=/usr/bin/getent
rpc_pipefs=/var/lib/nfs/rpc_pipefs
#
die()
{
echo "Usage: $0 cache_name entry_name"
exit 1
}
[ $# -lt 2 ] && die
cachename="$1"
cache_path=${rpc_pipefs}/cache/${cachename}/channel
case "${cachename}" in
dns_resolve)
name="$2"
result="$(${getent} hosts ${name} | ${cut} -f1 -d\ )"
[ -z "${result}" ] && result="0"
;;
*)
die
;;
esac
echo "${result} ${name} ${ttl}" >${cache_path}
Documentation/filesystems/seq_file.txt
浏览文件 @ 45bd00d3
......@@ -46,7 +46,7 @@ better to do. The file is seekable, in that one can do something like the
following:
dd if=/proc/sequence of=out1 count=1
dd if=/proc/sequence skip=1 out=out2 count=1
dd if=/proc/sequence skip=1 of=out2 count=1
Then concatenate the output files out1 and out2 and get the right
result. Yes, it is a thoroughly useless module, but the point is to show
......
Documentation/flexible-arrays.txt 0 → 100644
浏览文件 @ 45bd00d3
Using flexible arrays in the kernel
Last updated for 2.6.31
Jonathan Corbet <corbet@lwn.net>
Large contiguous memory allocations can be unreliable in the Linux kernel.
Kernel programmers will sometimes respond to this problem by allocating
pages with vmalloc(). This solution not ideal, though. On 32-bit systems,
memory from vmalloc() must be mapped into a relatively small address space;
it's easy to run out. On SMP systems, the page table changes required by
vmalloc() allocations can require expensive cross-processor interrupts on
all CPUs. And, on all systems, use of space in the vmalloc() range
increases pressure on the translation lookaside buffer (TLB), reducing the
performance of the system.
In many cases, the need for memory from vmalloc() can be eliminated by
piecing together an array from smaller parts; the flexible array library
exists to make this task easier.
A flexible array holds an arbitrary (within limits) number of fixed-sized
objects, accessed via an integer index. Sparse arrays are handled
reasonably well. Only single-page allocations are made, so memory
allocation failures should be relatively rare. The down sides are that the
arrays cannot be indexed directly, individual object size cannot exceed the
system page size, and putting data into a flexible array requires a copy
operation. It's also worth noting that flexible arrays do no internal
locking at all; if concurrent access to an array is possible, then the
caller must arrange for appropriate mutual exclusion.
The creation of a flexible array is done with:
#include <linux/flex_array.h>
struct flex_array *flex_array_alloc(int element_size,
unsigned int total,
gfp_t flags);
The individual object size is provided by element_size, while total is the
maximum number of objects which can be stored in the array. The flags
argument is passed directly to the internal memory allocation calls. With
the current code, using flags to ask for high memory is likely to lead to
notably unpleasant side effects.
Storing data into a flexible array is accomplished with a call to:
int flex_array_put(struct flex_array *array, unsigned int element_nr,
void *src, gfp_t flags);
This call will copy the data from src into the array, in the position
indicated by element_nr (which must be less than the maximum specified when
the array was created). If any memory allocations must be performed, flags
will be used. The return value is zero on success, a negative error code
otherwise.
There might possibly be a need to store data into a flexible array while
running in some sort of atomic context; in this situation, sleeping in the
memory allocator would be a bad thing. That can be avoided by using
GFP_ATOMIC for the flags value, but, often, there is a better way. The
trick is to ensure that any needed memory allocations are done before
entering atomic context, using:
int flex_array_prealloc(struct flex_array *array, unsigned int start,
unsigned int end, gfp_t flags);
This function will ensure that memory for the elements indexed in the range
defined by start and end has been allocated. Thereafter, a
flex_array_put() call on an element in that range is guaranteed not to
block.
Getting data back out of the array is done with:
void *flex_array_get(struct flex_array *fa, unsigned int element_nr);
The return value is a pointer to the data element, or NULL if that
particular element has never been allocated.
Note that it is possible to get back a valid pointer for an element which
has never been stored in the array. Memory for array elements is allocated
one page at a time; a single allocation could provide memory for several
adjacent elements. The flexible array code does not know if a specific
element has been written; it only knows if the associated memory is
present. So a flex_array_get() call on an element which was never stored
in the array has the potential to return a pointer to random data. If the
caller does not have a separate way to know which elements were actually
stored, it might be wise, at least, to add GFP_ZERO to the flags argument
to ensure that all elements are zeroed.
There is no way to remove a single element from the array. It is possible,
though, to remove all elements with a call to:
void flex_array_free_parts(struct flex_array *array);
This call frees all elements, but leaves the array itself in place.
Freeing the entire array is done with:
void flex_array_free(struct flex_array *array);
As of this writing, there are no users of flexible arrays in the mainline
kernel. The functions described here are also not exported to modules;
that will probably be fixed when somebody comes up with a need for it.
Documentation/input/sentelic.txt 0 → 100644
浏览文件 @ 45bd00d3
Copyright (C) 2002-2008 Sentelic Corporation.
Last update: Oct-31-2008
==============================================================================
* Finger Sensing Pad Intellimouse Mode(scrolling wheel, 4th and 5th buttons)
==============================================================================
A) MSID 4: Scrolling wheel mode plus Forward page(4th button) and Backward
page (5th button)
@1. Set sample rate to 200;
@2. Set sample rate to 200;
@3. Set sample rate to 80;
@4. Issuing the "Get device ID" command (0xF2) and waits for the response;
@5. FSP will respond 0x04.
Packet 1
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |Y|X|y|x|1|M|R|L| 2 |X|X|X|X|X|X|X|X| 3 |Y|Y|Y|Y|Y|Y|Y|Y| 4 | | |B|F|W|W|W|W|
|---------------| |---------------| |---------------| |---------------|
Byte 1: Bit7 => Y overflow
Bit6 => X overflow
Bit5 => Y sign bit
Bit4 => X sign bit
Bit3 => 1
Bit2 => Middle Button, 1 is pressed, 0 is not pressed.
Bit1 => Right Button, 1 is pressed, 0 is not pressed.
Bit0 => Left Button, 1 is pressed, 0 is not pressed.
Byte 2: X Movement(9-bit 2's complement integers)
Byte 3: Y Movement(9-bit 2's complement integers)
Byte 4: Bit3~Bit0 => the scrolling wheel's movement since the last data report.
valid values, -8 ~ +7
Bit4 => 1 = 4th mouse button is pressed, Forward one page.
0 = 4th mouse button is not pressed.
Bit5 => 1 = 5th mouse button is pressed, Backward one page.
0 = 5th mouse button is not pressed.
B) MSID 6: Horizontal and Vertical scrolling.
@ Set bit 1 in register 0x40 to 1
# FSP replaces scrolling wheel's movement as 4 bits to show horizontal and
vertical scrolling.
Packet 1
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |Y|X|y|x|1|M|R|L| 2 |X|X|X|X|X|X|X|X| 3 |Y|Y|Y|Y|Y|Y|Y|Y| 4 | | |B|F|l|r|u|d|
|---------------| |---------------| |---------------| |---------------|
Byte 1: Bit7 => Y overflow
Bit6 => X overflow
Bit5 => Y sign bit
Bit4 => X sign bit
Bit3 => 1
Bit2 => Middle Button, 1 is pressed, 0 is not pressed.
Bit1 => Right Button, 1 is pressed, 0 is not pressed.
Bit0 => Left Button, 1 is pressed, 0 is not pressed.
Byte 2: X Movement(9-bit 2's complement integers)
Byte 3: Y Movement(9-bit 2's complement integers)
Byte 4: Bit0 => the Vertical scrolling movement downward.
Bit1 => the Vertical scrolling movement upward.
Bit2 => the Vertical scrolling movement rightward.
Bit3 => the Vertical scrolling movement leftward.
Bit4 => 1 = 4th mouse button is pressed, Forward one page.
0 = 4th mouse button is not pressed.
Bit5 => 1 = 5th mouse button is pressed, Backward one page.
0 = 5th mouse button is not pressed.
C) MSID 7:
# FSP uses 2 packets(8 Bytes) data to represent Absolute Position
so we have PACKET NUMBER to identify packets.
If PACKET NUMBER is 0, the packet is Packet 1.
If PACKET NUMBER is 1, the packet is Packet 2.
Please count this number in program.
# MSID6 special packet will be enable at the same time when enable MSID 7.
==============================================================================
* Absolute position for STL3886-G0.
==============================================================================
@ Set bit 2 or 3 in register 0x40 to 1
@ Set bit 6 in register 0x40 to 1
Packet 1 (ABSOLUTE POSITION)
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |0|1|V|1|1|M|R|L| 2 |X|X|X|X|X|X|X|X| 3 |Y|Y|Y|Y|Y|Y|Y|Y| 4 |r|l|d|u|X|X|Y|Y|
|---------------| |---------------| |---------------| |---------------|
Byte 1: Bit7~Bit6 => 00, Normal data packet
=> 01, Absolute coordination packet
=> 10, Notify packet
Bit5 => valid bit
Bit4 => 1
Bit3 => 1
Bit2 => Middle Button, 1 is pressed, 0 is not pressed.
Bit1 => Right Button, 1 is pressed, 0 is not pressed.
Bit0 => Left Button, 1 is pressed, 0 is not pressed.
Byte 2: X coordinate (xpos[9:2])
Byte 3: Y coordinate (ypos[9:2])
Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0])
Bit3~Bit2 => X coordinate (ypos[1:0])
Bit4 => scroll up
Bit5 => scroll down
Bit6 => scroll left
Bit7 => scroll right
Notify Packet for G0
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |1|0|0|1|1|M|R|L| 2 |C|C|C|C|C|C|C|C| 3 |M|M|M|M|M|M|M|M| 4 |0|0|0|0|0|0|0|0|
|---------------| |---------------| |---------------| |---------------|
Byte 1: Bit7~Bit6 => 00, Normal data packet
=> 01, Absolute coordination packet
=> 10, Notify packet
Bit5 => 0
Bit4 => 1
Bit3 => 1
Bit2 => Middle Button, 1 is pressed, 0 is not pressed.
Bit1 => Right Button, 1 is pressed, 0 is not pressed.
Bit0 => Left Button, 1 is pressed, 0 is not pressed.
Byte 2: Message Type => 0x5A (Enable/Disable status packet)
Mode Type => 0xA5 (Normal/Icon mode status)
Byte 3: Message Type => 0x00 (Disabled)
=> 0x01 (Enabled)
Mode Type => 0x00 (Normal)
=> 0x01 (Icon)
Byte 4: Bit7~Bit0 => Don't Care
==============================================================================
* Absolute position for STL3888-A0.
==============================================================================
Packet 1 (ABSOLUTE POSITION)
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |0|1|V|A|1|L|0|1| 2 |X|X|X|X|X|X|X|X| 3 |Y|Y|Y|Y|Y|Y|Y|Y| 4 |x|x|y|y|X|X|Y|Y|
|---------------| |---------------| |---------------| |---------------|
Byte 1: Bit7~Bit6 => 00, Normal data packet
=> 01, Absolute coordination packet
=> 10, Notify packet
Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up.
When both fingers are up, the last two reports have zero valid
bit.
Bit4 => arc
Bit3 => 1
Bit2 => Left Button, 1 is pressed, 0 is released.
Bit1 => 0
Bit0 => 1
Byte 2: X coordinate (xpos[9:2])
Byte 3: Y coordinate (ypos[9:2])
Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0])
Bit3~Bit2 => X coordinate (ypos[1:0])
Bit5~Bit4 => y1_g
Bit7~Bit6 => x1_g
Packet 2 (ABSOLUTE POSITION)
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |0|1|V|A|1|R|1|0| 2 |X|X|X|X|X|X|X|X| 3 |Y|Y|Y|Y|Y|Y|Y|Y| 4 |x|x|y|y|X|X|Y|Y|
|---------------| |---------------| |---------------| |---------------|
Byte 1: Bit7~Bit6 => 00, Normal data packet
=> 01, Absolute coordinates packet
=> 10, Notify packet
Bit5 => Valid bit, 0 means that the coordinate is invalid or finger up.
When both fingers are up, the last two reports have zero valid
bit.
Bit4 => arc
Bit3 => 1
Bit2 => Right Button, 1 is pressed, 0 is released.
Bit1 => 1
Bit0 => 0
Byte 2: X coordinate (xpos[9:2])
Byte 3: Y coordinate (ypos[9:2])
Byte 4: Bit1~Bit0 => Y coordinate (xpos[1:0])
Bit3~Bit2 => X coordinate (ypos[1:0])
Bit5~Bit4 => y2_g
Bit7~Bit6 => x2_g
Notify Packet for STL3888-A0
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |1|0|1|P|1|M|R|L| 2 |C|C|C|C|C|C|C|C| 3 |0|0|F|F|0|0|0|i| 4 |r|l|d|u|0|0|0|0|
|---------------| |---------------| |---------------| |---------------|
Byte 1: Bit7~Bit6 => 00, Normal data packet
=> 01, Absolute coordination packet
=> 10, Notify packet
Bit5 => 1
Bit4 => when in absolute coordinates mode (valid when EN_PKT_GO is 1):
0: left button is generated by the on-pad command
1: left button is generated by the external button
Bit3 => 1
Bit2 => Middle Button, 1 is pressed, 0 is not pressed.
Bit1 => Right Button, 1 is pressed, 0 is not pressed.
Bit0 => Left Button, 1 is pressed, 0 is not pressed.
Byte 2: Message Type => 0xB7 (Multi Finger, Multi Coordinate mode)
Byte 3: Bit7~Bit6 => Don't care
Bit5~Bit4 => Number of fingers
Bit3~Bit1 => Reserved
Bit0 => 1: enter gesture mode; 0: leaving gesture mode
Byte 4: Bit7 => scroll right button
Bit6 => scroll left button
Bit5 => scroll down button
Bit4 => scroll up button
* Note that if gesture and additional button (Bit4~Bit7)
happen at the same time, the button information will not
be sent.
Bit3~Bit0 => Reserved
Sample sequence of Multi-finger, Multi-coordinate mode:
notify packet (valid bit == 1), abs pkt 1, abs pkt 2, abs pkt 1,
abs pkt 2, ..., notify packet(valid bit == 0)
==============================================================================
* FSP Enable/Disable packet
==============================================================================
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
1 |Y|X|0|0|1|M|R|L| 2 |0|1|0|1|1|0|1|E| 3 | | | | | | | | | 4 | | | | | | | | |
|---------------| |---------------| |---------------| |---------------|
FSP will send out enable/disable packet when FSP receive PS/2 enable/disable
command. Host will receive the packet which Middle, Right, Left button will
be set. The packet only use byte 0 and byte 1 as a pattern of original packet.
Ignore the other bytes of the packet.
Byte 1: Bit7 => 0, Y overflow
Bit6 => 0, X overflow
Bit5 => 0, Y sign bit
Bit4 => 0, X sign bit
Bit3 => 1
Bit2 => 1, Middle Button
Bit1 => 1, Right Button
Bit0 => 1, Left Button
Byte 2: Bit7~1 => (0101101b)
Bit0 => 1 = Enable
0 = Disable
Byte 3: Don't care
Byte 4: Don't care (MOUSE ID 3, 4)
Byte 5~8: Don't care (Absolute packet)
==============================================================================
* PS/2 Command Set
==============================================================================
FSP supports basic PS/2 commanding set and modes, refer to following URL for
details about PS/2 commands:
http://www.computer-engineering.org/index.php?title=PS/2_Mouse_Interface
==============================================================================
* Programming Sequence for Determining Packet Parsing Flow
==============================================================================
1. Identify FSP by reading device ID(0x00) and version(0x01) register
2. Determine number of buttons by reading status2 (0x0b) register
buttons = reg[0x0b] & 0x30
if buttons == 0x30 or buttons == 0x20:
# two/four buttons
Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse'
section A for packet parsing detail(ignore byte 4, bit ~ 7)
elif buttons == 0x10:
# 6 buttons
Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse'
section B for packet parsing detail
elif buttons == 0x00:
# 6 buttons
Refer to 'Finger Sensing Pad PS/2 Mouse Intellimouse'
section A for packet parsing detail
==============================================================================
* Programming Sequence for Register Reading/Writing
==============================================================================
Register inversion requirement:
Following values needed to be inverted(the '~' operator in C) before being
sent to FSP:
0xe9, 0xee, 0xf2 and 0xff.
Register swapping requirement:
Following values needed to have their higher 4 bits and lower 4 bits being
swapped before being sent to FSP:
10, 20, 40, 60, 80, 100 and 200.
Register reading sequence:
1. send 0xf3 PS/2 command to FSP;
2. send 0x66 PS/2 command to FSP;
3. send 0x88 PS/2 command to FSP;
4. send 0xf3 PS/2 command to FSP;
5. if the register address being to read is not required to be
inverted(refer to the 'Register inversion requirement' section),
goto step 6
5a. send 0x68 PS/2 command to FSP;
5b. send the inverted register address to FSP and goto step 8;
6. if the register address being to read is not required to be
swapped(refer to the 'Register swapping requirement' section),
goto step 7
6a. send 0xcc PS/2 command to FSP;
6b. send the swapped register address to FSP and goto step 8;
7. send 0x66 PS/2 command to FSP;
7a. send the original register address to FSP and goto step 8;
8. send 0xe9(status request) PS/2 command to FSP;
9. the response read from FSP should be the requested register value.
Register writing sequence:
1. send 0xf3 PS/2 command to FSP;
2. if the register address being to write is not required to be
inverted(refer to the 'Register inversion requirement' section),
goto step 3
2a. send 0x74 PS/2 command to FSP;
2b. send the inverted register address to FSP and goto step 5;
3. if the register address being to write is not required to be
swapped(refer to the 'Register swapping requirement' section),
goto step 4
3a. send 0x77 PS/2 command to FSP;
3b. send the swapped register address to FSP and goto step 5;
4. send 0x55 PS/2 command to FSP;
4a. send the register address to FSP and goto step 5;
5. send 0xf3 PS/2 command to FSP;
6. if the register value being to write is not required to be
inverted(refer to the 'Register inversion requirement' section),
goto step 7
6a. send 0x47 PS/2 command to FSP;
6b. send the inverted register value to FSP and goto step 9;
7. if the register value being to write is not required to be
swapped(refer to the 'Register swapping requirement' section),
goto step 8
7a. send 0x44 PS/2 command to FSP;
7b. send the swapped register value to FSP and goto step 9;
8. send 0x33 PS/2 command to FSP;
8a. send the register value to FSP;
9. the register writing sequence is completed.
==============================================================================
* Register Listing
==============================================================================
offset width default r/w name
0x00 bit7~bit0 0x01 RO device ID
0x01 bit7~bit0 0xc0 RW version ID
0x02 bit7~bit0 0x01 RO vendor ID
0x03 bit7~bit0 0x01 RO product ID
0x04 bit3~bit0 0x01 RW revision ID
0x0b RO test mode status 1
bit3 1 RO 0: rotate 180 degree, 1: no rotation
bit5~bit4 RO number of buttons
11 => 2, lbtn/rbtn
10 => 4, lbtn/rbtn/scru/scrd
01 => 6, lbtn/rbtn/scru/scrd/scrl/scrr
00 => 6, lbtn/rbtn/scru/scrd/fbtn/bbtn
0x0f RW register file page control
bit0 0 RW 1 to enable page 1 register files
0x10 RW system control 1
bit0 1 RW Reserved, must be 1
bit1 0 RW Reserved, must be 0
bit4 1 RW Reserved, must be 0
bit5 0 RW register clock gating enable
0: read only, 1: read/write enable
(Note that following registers does not require clock gating being
enabled prior to write: 05 06 07 08 09 0c 0f 10 11 12 16 17 18 23 2e
40 41 42 43.)
0x31 RW on-pad command detection
bit7 0 RW on-pad command left button down tag
enable
0: disable, 1: enable
0x34 RW on-pad command control 5
bit4~bit0 0x05 RW XLO in 0s/4/1, so 03h = 0010.1b = 2.5
(Note that position unit is in 0.5 scanline)
bit7 0 RW on-pad tap zone enable
0: disable, 1: enable
0x35 RW on-pad command control 6
bit4~bit0 0x1d RW XHI in 0s/4/1, so 19h = 1100.1b = 12.5
(Note that position unit is in 0.5 scanline)
0x36 RW on-pad command control 7
bit4~bit0 0x04 RW YLO in 0s/4/1, so 03h = 0010.1b = 2.5
(Note that position unit is in 0.5 scanline)
0x37 RW on-pad command control 8
bit4~bit0 0x13 RW YHI in 0s/4/1, so 11h = 1000.1b = 8.5
(Note that position unit is in 0.5 scanline)
0x40 RW system control 5
bit1 0 RW FSP Intellimouse mode enable
0: disable, 1: enable
bit2 0 RW movement + abs. coordinate mode enable
0: disable, 1: enable
(Note that this function has the functionality of bit 1 even when
bit 1 is not set. However, the format is different from that of bit 1.
In addition, when bit 1 and bit 2 are set at the same time, bit 2 will
override bit 1.)
bit3 0 RW abs. coordinate only mode enable
0: disable, 1: enable
(Note that this function has the functionality of bit 1 even when
bit 1 is not set. However, the format is different from that of bit 1.
In addition, when bit 1, bit 2 and bit 3 are set at the same time,
bit 3 will override bit 1 and 2.)
bit5 0 RW auto switch enable
0: disable, 1: enable
bit6 0 RW G0 abs. + notify packet format enable
0: disable, 1: enable
(Note that the absolute/relative coordinate output still depends on
bit 2 and 3. That is, if any of those bit is 1, host will receive
absolute coordinates; otherwise, host only receives packets with
relative coordinate.)
0x43 RW on-pad control
bit0 0 RW on-pad control enable
0: disable, 1: enable
(Note that if this bit is cleared, bit 3/5 will be ineffective)
bit3 0 RW on-pad fix vertical scrolling enable
0: disable, 1: enable
bit5 0 RW on-pad fix horizontal scrolling enable
0: disable, 1: enable
Documentation/intel_txt.txt 0 → 100644
浏览文件 @ 45bd00d3
Intel(R) TXT Overview:
=====================
Intel's technology for safer computing, Intel(R) Trusted Execution
Technology (Intel(R) TXT), defines platform-level enhancements that
provide the building blocks for creating trusted platforms.
Intel TXT was formerly known by the code name LaGrande Technology (LT).
Intel TXT in Brief:
o Provides dynamic root of trust for measurement (DRTM)
o Data protection in case of improper shutdown
o Measurement and verification of launched environment
Intel TXT is part of the vPro(TM) brand and is also available some
non-vPro systems. It is currently available on desktop systems
based on the Q35, X38, Q45, and Q43 Express chipsets (e.g. Dell
Optiplex 755, HP dc7800, etc.) and mobile systems based on the GM45,
PM45, and GS45 Express chipsets.
For more information, see http://www.intel.com/technology/security/.
This site also has a link to the Intel TXT MLE Developers Manual,
which has been updated for the new released platforms.
Intel TXT has been presented at various events over the past few
years, some of which are:
LinuxTAG 2008:
http://www.linuxtag.org/2008/en/conf/events/vp-donnerstag/
details.html?talkid=110
TRUST2008:
http://www.trust2008.eu/downloads/Keynote-Speakers/
3_David-Grawrock_The-Front-Door-of-Trusted-Computing.pdf
IDF 2008, Shanghai:
http://inteldeveloperforum.com.edgesuite.net/shanghai_2008/
aep/PROS003/index.html
IDFs 2006, 2007 (I'm not sure if/where they are online)
Trusted Boot Project Overview:
=============================
Trusted Boot (tboot) is an open source, pre- kernel/VMM module that
uses Intel TXT to perform a measured and verified launch of an OS
kernel/VMM.
It is hosted on SourceForge at http://sourceforge.net/projects/tboot.
The mercurial source repo is available at http://www.bughost.org/
repos.hg/tboot.hg.
Tboot currently supports launching Xen (open source VMM/hypervisor
w/ TXT support since v3.2), and now Linux kernels.
Value Proposition for Linux or "Why should you care?"
=====================================================
While there are many products and technologies that attempt to
measure or protect the integrity of a running kernel, they all
assume the kernel is "good" to begin with. The Integrity
Measurement Architecture (IMA) and Linux Integrity Module interface
are examples of such solutions.
To get trust in the initial kernel without using Intel TXT, a
static root of trust must be used. This bases trust in BIOS
starting at system reset and requires measurement of all code
executed between system reset through the completion of the kernel
boot as well as data objects used by that code. In the case of a
Linux kernel, this means all of BIOS, any option ROMs, the
bootloader and the boot config. In practice, this is a lot of
code/data, much of which is subject to change from boot to boot
(e.g. changing NICs may change option ROMs). Without reference
hashes, these measurement changes are difficult to assess or
confirm as benign. This process also does not provide DMA
protection, memory configuration/alias checks and locks, crash
protection, or policy support.
By using the hardware-based root of trust that Intel TXT provides,
many of these issues can be mitigated. Specifically: many
pre-launch components can be removed from the trust chain, DMA
protection is provided to all launched components, a large number
of platform configuration checks are performed and values locked,
protection is provided for any data in the event of an improper
shutdown, and there is support for policy-based execution/verification.
This provides a more stable measurement and a higher assurance of
system configuration and initial state than would be otherwise
possible. Since the tboot project is open source, source code for
almost all parts of the trust chain is available (excepting SMM and
Intel-provided firmware).
How Does it Work?
=================
o Tboot is an executable that is launched by the bootloader as
the "kernel" (the binary the bootloader executes).
o It performs all of the work necessary to determine if the
platform supports Intel TXT and, if so, executes the GETSEC[SENTER]
processor instruction that initiates the dynamic root of trust.
- If tboot determines that the system does not support Intel TXT
or is not configured correctly (e.g. the SINIT AC Module was
incorrect), it will directly launch the kernel with no changes
to any state.
- Tboot will output various information about its progress to the
terminal, serial port, and/or an in-memory log; the output
locations can be configured with a command line switch.
o The GETSEC[SENTER] instruction will return control to tboot and
tboot then verifies certain aspects of the environment (e.g. TPM NV
lock, e820 table does not have invalid entries, etc.).
o It will wake the APs from the special sleep state the GETSEC[SENTER]
instruction had put them in and place them into a wait-for-SIPI
state.
- Because the processors will not respond to an INIT or SIPI when
in the TXT environment, it is necessary to create a small VT-x
guest for the APs. When they run in this guest, they will
simply wait for the INIT-SIPI-SIPI sequence, which will cause
VMEXITs, and then disable VT and jump to the SIPI vector. This
approach seemed like a better choice than having to insert
special code into the kernel's MP wakeup sequence.
o Tboot then applies an (optional) user-defined launch policy to
verify the kernel and initrd.
- This policy is rooted in TPM NV and is described in the tboot
project. The tboot project also contains code for tools to
create and provision the policy.
- Policies are completely under user control and if not present
then any kernel will be launched.
- Policy action is flexible and can include halting on failures
or simply logging them and continuing.
o Tboot adjusts the e820 table provided by the bootloader to reserve
its own location in memory as well as to reserve certain other
TXT-related regions.
o As part of it's launch, tboot DMA protects all of RAM (using the
VT-d PMRs). Thus, the kernel must be booted with 'intel_iommu=on'
in order to remove this blanket protection and use VT-d's
page-level protection.
o Tboot will populate a shared page with some data about itself and
pass this to the Linux kernel as it transfers control.
- The location of the shared page is passed via the boot_params
struct as a physical address.
o The kernel will look for the tboot shared page address and, if it
exists, map it.
o As one of the checks/protections provided by TXT, it makes a copy
of the VT-d DMARs in a DMA-protected region of memory and verifies
them for correctness. The VT-d code will detect if the kernel was
launched with tboot and use this copy instead of the one in the
ACPI table.
o At this point, tboot and TXT are out of the picture until a
shutdown (S<n>)
o In order to put a system into any of the sleep states after a TXT
launch, TXT must first be exited. This is to prevent attacks that
attempt to crash the system to gain control on reboot and steal
data left in memory.
- The kernel will perform all of its sleep preparation and
populate the shared page with the ACPI data needed to put the
platform in the desired sleep state.
- Then the kernel jumps into tboot via the vector specified in the
shared page.
- Tboot will clean up the environment and disable TXT, then use the
kernel-provided ACPI information to actually place the platform
into the desired sleep state.
- In the case of S3, tboot will also register itself as the resume
vector. This is necessary because it must re-establish the
measured environment upon resume. Once the TXT environment
has been restored, it will restore the TPM PCRs and then
transfer control back to the kernel's S3 resume vector.
In order to preserve system integrity across S3, the kernel
provides tboot with a set of memory ranges (kernel
code/data/bss, S3 resume code, and AP trampoline) that tboot
will calculate a MAC (message authentication code) over and then
seal with the TPM. On resume and once the measured environment
has been re-established, tboot will re-calculate the MAC and
verify it against the sealed value. Tboot's policy determines
what happens if the verification fails.
That's pretty much it for TXT support.
Configuring the System:
======================
This code works with 32bit, 32bit PAE, and 64bit (x86_64) kernels.
In BIOS, the user must enable: TPM, TXT, VT-x, VT-d. Not all BIOSes
allow these to be individually enabled/disabled and the screens in
which to find them are BIOS-specific.
grub.conf needs to be modified as follows:
title Linux 2.6.29-tip w/ tboot
root (hd0,0)
kernel /tboot.gz logging=serial,vga,memory
module /vmlinuz-2.6.29-tip intel_iommu=on ro
root=LABEL=/ rhgb console=ttyS0,115200 3
module /initrd-2.6.29-tip.img
module /Q35_SINIT_17.BIN
The kernel option for enabling Intel TXT support is found under the
Security top-level menu and is called "Enable Intel(R) Trusted
Execution Technology (TXT)". It is marked as EXPERIMENTAL and
depends on the generic x86 support (to allow maximum flexibility in
kernel build options), since the tboot code will detect whether the
platform actually supports Intel TXT and thus whether any of the
kernel code is executed.
The Q35_SINIT_17.BIN file is what Intel TXT refers to as an
Authenticated Code Module. It is specific to the chipset in the
system and can also be found on the Trusted Boot site. It is an
(unencrypted) module signed by Intel that is used as part of the
DRTM process to verify and configure the system. It is signed
because it operates at a higher privilege level in the system than
any other macrocode and its correct operation is critical to the
establishment of the DRTM. The process for determining the correct
SINIT ACM for a system is documented in the SINIT-guide.txt file
that is on the tboot SourceForge site under the SINIT ACM downloads.
Documentation/ioctl/ioctl-number.txt
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......@@ -121,6 +121,7 @@ Code Seq# Include File Comments
'c' 00-7F linux/comstats.h conflict!
'c' 00-7F linux/coda.h conflict!
'c' 80-9F arch/s390/include/asm/chsc.h
'c' A0-AF arch/x86/include/asm/msr.h
'd' 00-FF linux/char/drm/drm/h conflict!
'd' F0-FF linux/digi1.h
'e' all linux/digi1.h conflict!
......@@ -192,7 +193,7 @@ Code Seq# Include File Comments
0xAD 00 Netfilter device in development:
<mailto:rusty@rustcorp.com.au>
0xAE all linux/kvm.h Kernel-based Virtual Machine
<mailto:kvm-devel@lists.sourceforge.net>
<mailto:kvm@vger.kernel.org>
0xB0 all RATIO devices in development:
<mailto:vgo@ratio.de>
0xB1 00-1F PPPoX <mailto:mostrows@styx.uwaterloo.ca>
......
Documentation/kernel-parameters.txt
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......@@ -57,6 +57,7 @@ parameter is applicable:
ISAPNP ISA PnP code is enabled.
ISDN Appropriate ISDN support is enabled.
JOY Appropriate joystick support is enabled.
KVM Kernel Virtual Machine support is enabled.
LIBATA Libata driver is enabled
LP Printer support is enabled.
LOOP Loopback device support is enabled.
......@@ -1098,6 +1099,44 @@ and is between 256 and 4096 characters. It is defined in the file
kstack=N [X86] Print N words from the kernel stack
in oops dumps.
kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
Default is 0 (don't ignore, but inject #GP)
kvm.oos_shadow= [KVM] Disable out-of-sync shadow paging.
Default is 1 (enabled)
kvm-amd.nested= [KVM,AMD] Allow nested virtualization in KVM/SVM.
Default is 0 (off)
kvm-amd.npt= [KVM,AMD] Disable nested paging (virtualized MMU)
for all guests.
Default is 1 (enabled) if in 64bit or 32bit-PAE mode
kvm-intel.bypass_guest_pf=
[KVM,Intel] Disables bypassing of guest page faults
on Intel chips. Default is 1 (enabled)
kvm-intel.ept= [KVM,Intel] Disable extended page tables
(virtualized MMU) support on capable Intel chips.
Default is 1 (enabled)
kvm-intel.emulate_invalid_guest_state=
[KVM,Intel] Enable emulation of invalid guest states
Default is 0 (disabled)
kvm-intel.flexpriority=
[KVM,Intel] Disable FlexPriority feature (TPR shadow).
Default is 1 (enabled)
kvm-intel.unrestricted_guest=
[KVM,Intel] Disable unrestricted guest feature
(virtualized real and unpaged mode) on capable
Intel chips. Default is 1 (enabled)
kvm-intel.vpid= [KVM,Intel] Disable Virtual Processor Identification
feature (tagged TLBs) on capable Intel chips.
Default is 1 (enabled)
l2cr= [PPC]
l3cr= [PPC]
......@@ -1503,6 +1542,14 @@ and is between 256 and 4096 characters. It is defined in the file
[NFS] set the TCP port on which the NFSv4 callback
channel should listen.
nfs.cache_getent=
[NFS] sets the pathname to the program which is used
to update the NFS client cache entries.
nfs.cache_getent_timeout=
[NFS] sets the timeout after which an attempt to
update a cache entry is deemed to have failed.
nfs.idmap_cache_timeout=
[NFS] set the maximum lifetime for idmapper cache
entries.
......@@ -1535,6 +1582,11 @@ and is between 256 and 4096 characters. It is defined in the file
symbolic names: lapic and ioapic
Example: nmi_watchdog=2 or nmi_watchdog=panic,lapic
netpoll.carrier_timeout=
[NET] Specifies amount of time (in seconds) that
netpoll should wait for a carrier. By default netpoll
waits 4 seconds.
no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
emulation library even if a 387 maths coprocessor
is present.
......@@ -1919,11 +1971,12 @@ and is between 256 and 4096 characters. It is defined in the file
Format: { 0 | 1 }
See arch/parisc/kernel/pdc_chassis.c
percpu_alloc= [X86] Select which percpu first chunk allocator to use.
Allowed values are one of "lpage", "embed" and "4k".
See comments in arch/x86/kernel/setup_percpu.c for
details on each allocator. This parameter is primarily
for debugging and performance comparison.
percpu_alloc= Select which percpu first chunk allocator to use.
Currently supported values are "embed" and "page".
Archs may support subset or none of the selections.
See comments in mm/percpu.c for details on each
allocator. This parameter is primarily for debugging
and performance comparison.
pf. [PARIDE]
See Documentation/blockdev/paride.txt.
......@@ -2395,6 +2448,18 @@ and is between 256 and 4096 characters. It is defined in the file
stifb= [HW]
Format: bpp:<bpp1>[:<bpp2>[:<bpp3>...]]
sunrpc.min_resvport=
sunrpc.max_resvport=
[NFS,SUNRPC]
SunRPC servers often require that client requests
originate from a privileged port (i.e. a port in the
range 0 < portnr < 1024).
An administrator who wishes to reserve some of these
ports for other uses may adjust the range that the
kernel's sunrpc client considers to be privileged
using these two parameters to set the minimum and
maximum port values.
sunrpc.pool_mode=
[NFS]
Control how the NFS server code allocates CPUs to
......@@ -2411,6 +2476,15 @@ and is between 256 and 4096 characters. It is defined in the file
pernode one pool for each NUMA node (equivalent
to global on non-NUMA machines)
sunrpc.tcp_slot_table_entries=
sunrpc.udp_slot_table_entries=
[NFS,SUNRPC]
Sets the upper limit on the number of simultaneous
RPC calls that can be sent from the client to a
server. Increasing these values may allow you to
improve throughput, but will also increase the
amount of memory reserved for use by the client.
swiotlb= [IA-64] Number of I/O TLB slabs
switches= [HW,M68k]
......
Documentation/keys.txt
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......@@ -26,7 +26,7 @@ This document has the following sections:
- Notes on accessing payload contents
- Defining a key type
- Request-key callback service
- Key access filesystem
- Garbage collection
============
......@@ -113,6 +113,9 @@ Each key has a number of attributes:
(*) Dead. The key's type was unregistered, and so the key is now useless.
Keys in the last three states are subject to garbage collection. See the
section on "Garbage collection".
====================
KEY SERVICE OVERVIEW
......@@ -754,6 +757,26 @@ The keyctl syscall functions are:
successful.
(*) Install the calling process's session keyring on its parent.
long keyctl(KEYCTL_SESSION_TO_PARENT);
This functions attempts to install the calling process's session keyring
on to the calling process's parent, replacing the parent's current session
keyring.
The calling process must have the same ownership as its parent, the
keyring must have the same ownership as the calling process, the calling
process must have LINK permission on the keyring and the active LSM module
mustn't deny permission, otherwise error EPERM will be returned.
Error ENOMEM will be returned if there was insufficient memory to complete
the operation, otherwise 0 will be returned to indicate success.
The keyring will be replaced next time the parent process leaves the
kernel and resumes executing userspace.
===============
KERNEL SERVICES
===============
......@@ -1231,3 +1254,17 @@ by executing:
In this case, the program isn't required to actually attach the key to a ring;
the rings are provided for reference.
==================
GARBAGE COLLECTION
==================
Dead keys (for which the type has been removed) will be automatically unlinked
from those keyrings that point to them and deleted as soon as possible by a
background garbage collector.
Similarly, revoked and expired keys will be garbage collected, but only after a
certain amount of time has passed. This time is set as a number of seconds in:
/proc/sys/kernel/keys/gc_delay
Documentation/kmemleak.txt
浏览文件 @ 45bd00d3
......@@ -27,6 +27,13 @@ To trigger an intermediate memory scan:
# echo scan > /sys/kernel/debug/kmemleak
To clear the list of all current possible memory leaks:
# echo clear > /sys/kernel/debug/kmemleak
New leaks will then come up upon reading /sys/kernel/debug/kmemleak
again.
Note that the orphan objects are listed in the order they were allocated
and one object at the beginning of the list may cause other subsequent
objects to be reported as orphan.
......@@ -42,6 +49,9 @@ Memory scanning parameters can be modified at run-time by writing to the
scan=<secs> - set the automatic memory scanning period in seconds
(default 600, 0 to stop the automatic scanning)
scan - trigger a memory scan
clear - clear list of current memory leak suspects, done by
marking all current reported unreferenced objects grey
dump=<addr> - dump information about the object found at <addr>
Kmemleak can also be disabled at boot-time by passing "kmemleak=off" on
the kernel command line.
......@@ -86,6 +96,27 @@ avoid this, kmemleak can also store the number of values pointing to an
address inside the block address range that need to be found so that the
block is not considered a leak. One example is __vmalloc().
Testing specific sections with kmemleak
---------------------------------------
Upon initial bootup your /sys/kernel/debug/kmemleak output page may be
quite extensive. This can also be the case if you have very buggy code
when doing development. To work around these situations you can use the
'clear' command to clear all reported unreferenced objects from the
/sys/kernel/debug/kmemleak output. By issuing a 'scan' after a 'clear'
you can find new unreferenced objects; this should help with testing
specific sections of code.
To test a critical section on demand with a clean kmemleak do:
# echo clear > /sys/kernel/debug/kmemleak
... test your kernel or modules ...
# echo scan > /sys/kernel/debug/kmemleak
Then as usual to get your report with:
# cat /sys/kernel/debug/kmemleak
Kmemleak API
------------
......
Documentation/kvm/api.txt 0 → 100644
浏览文件 @ 45bd00d3
此差异已折叠。
Documentation/networking/00-INDEX
浏览文件 @ 45bd00d3
......@@ -60,6 +60,8 @@ framerelay.txt
- info on using Frame Relay/Data Link Connection Identifier (DLCI).
generic_netlink.txt
- info on Generic Netlink
ieee802154.txt
- Linux IEEE 802.15.4 implementation, API and drivers
ip-sysctl.txt
- /proc/sys/net/ipv4/* variables
ip_dynaddr.txt
......
Documentation/networking/ieee802154.txt
浏览文件 @ 45bd00d3
......@@ -22,7 +22,7 @@ int sd = socket(PF_IEEE802154, SOCK_DGRAM, 0);
.....
The address family, socket addresses etc. are defined in the
include/net/ieee802154/af_ieee802154.h header or in the special header
include/net/af_ieee802154.h header or in the special header
in our userspace package (see either linux-zigbee sourceforge download page
or git tree at git://linux-zigbee.git.sourceforge.net/gitroot/linux-zigbee).
......@@ -33,7 +33,7 @@ MLME - MAC Level Management
============================
Most of IEEE 802.15.4 MLME interfaces are directly mapped on netlink commands.
See the include/net/ieee802154/nl802154.h header. Our userspace tools package
See the include/net/nl802154.h header. Our userspace tools package
(see above) provides CLI configuration utility for radio interfaces and simple
coordinator for IEEE 802.15.4 networks as an example users of MLME protocol.
......@@ -54,10 +54,14 @@ Those types of devices require different approach to be hooked into Linux kernel
HardMAC
=======
See the header include/net/ieee802154/netdevice.h. You have to implement Linux
See the header include/net/ieee802154_netdev.h. You have to implement Linux
net_device, with .type = ARPHRD_IEEE802154. Data is exchanged with socket family
code via plain sk_buffs. The control block of sk_buffs will contain additional
info as described in the struct ieee802154_mac_cb.
code via plain sk_buffs. On skb reception skb->cb must contain additional
info as described in the struct ieee802154_mac_cb. During packet transmission
the skb->cb is used to provide additional data to device's header_ops->create
function. Be aware, that this data can be overriden later (when socket code
submits skb to qdisc), so if you need something from that cb later, you should
store info in the skb->data on your own.
To hook the MLME interface you have to populate the ml_priv field of your
net_device with a pointer to struct ieee802154_mlme_ops instance. All fields are
......@@ -69,8 +73,8 @@ We provide an example of simple HardMAC driver at drivers/ieee802154/fakehard.c
SoftMAC
=======
We are going to provide intermediate layer impelementing IEEE 802.15.4 MAC
We are going to provide intermediate layer implementing IEEE 802.15.4 MAC
in software. This is currently WIP.
See header include/net/ieee802154/mac802154.h and several drivers in
drivers/ieee802154/
See header include/net/mac802154.h and several drivers in drivers/ieee802154/.
Documentation/networking/ip-sysctl.txt
浏览文件 @ 45bd00d3
......@@ -311,9 +311,12 @@ tcp_no_metrics_save - BOOLEAN
connections.
tcp_orphan_retries - INTEGER
How may times to retry before killing TCP connection, closed
by our side. Default value 7 corresponds to ~50sec-16min
depending on RTO. If you machine is loaded WEB server,
This value influences the timeout of a locally closed TCP connection,
when RTO retransmissions remain unacknowledged.
See tcp_retries2 for more details.
The default value is 7.
If your machine is a loaded WEB server,
you should think about lowering this value, such sockets
may consume significant resources. Cf. tcp_max_orphans.
......@@ -327,16 +330,28 @@ tcp_retrans_collapse - BOOLEAN
certain TCP stacks.
tcp_retries1 - INTEGER
How many times to retry before deciding that something is wrong
and it is necessary to report this suspicion to network layer.
Minimal RFC value is 3, it is default, which corresponds
to ~3sec-8min depending on RTO.
This value influences the time, after which TCP decides, that
something is wrong due to unacknowledged RTO retransmissions,
and reports this suspicion to the network layer.
See tcp_retries2 for more details.
RFC 1122 recommends at least 3 retransmissions, which is the
default.
tcp_retries2 - INTEGER
How may times to retry before killing alive TCP connection.
RFC1122 says that the limit should be longer than 100 sec.
It is too small number. Default value 15 corresponds to ~13-30min
depending on RTO.
This value influences the timeout of an alive TCP connection,
when RTO retransmissions remain unacknowledged.
Given a value of N, a hypothetical TCP connection following
exponential backoff with an initial RTO of TCP_RTO_MIN would
retransmit N times before killing the connection at the (N+1)th RTO.
The default value of 15 yields a hypothetical timeout of 924.6
seconds and is a lower bound for the effective timeout.
TCP will effectively time out at the first RTO which exceeds the
hypothetical timeout.
RFC 1122 recommends at least 100 seconds for the timeout,
which corresponds to a value of at least 8.
tcp_rfc1337 - BOOLEAN
If set, the TCP stack behaves conforming to RFC1337. If unset,
......@@ -1282,6 +1297,16 @@ sctp_rmem - vector of 3 INTEGERs: min, default, max
sctp_wmem - vector of 3 INTEGERs: min, default, max
See tcp_wmem for a description.
addr_scope_policy - INTEGER
Control IPv4 address scoping - draft-stewart-tsvwg-sctp-ipv4-00
0 - Disable IPv4 address scoping
1 - Enable IPv4 address scoping
2 - Follow draft but allow IPv4 private addresses
3 - Follow draft but allow IPv4 link local addresses
Default: 1
/proc/sys/net/core/*
dev_weight - INTEGER
......
Documentation/power/runtime_pm.txt 0 → 100644
浏览文件 @ 45bd00d3
Run-time Power Management Framework for I/O Devices
(C) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
1. Introduction
Support for run-time power management (run-time PM) of I/O devices is provided
at the power management core (PM core) level by means of:
* The power management workqueue pm_wq in which bus types and device drivers can
put their PM-related work items. It is strongly recommended that pm_wq be
used for queuing all work items related to run-time PM, because this allows
them to be synchronized with system-wide power transitions (suspend to RAM,
hibernation and resume from system sleep states). pm_wq is declared in
include/linux/pm_runtime.h and defined in kernel/power/main.c.
* A number of run-time PM fields in the 'power' member of 'struct device' (which
is of the type 'struct dev_pm_info', defined in include/linux/pm.h) that can
be used for synchronizing run-time PM operations with one another.
* Three device run-time PM callbacks in 'struct dev_pm_ops' (defined in
include/linux/pm.h).
* A set of helper functions defined in drivers/base/power/runtime.c that can be
used for carrying out run-time PM operations in such a way that the
synchronization between them is taken care of by the PM core. Bus types and
device drivers are encouraged to use these functions.
The run-time PM callbacks present in 'struct dev_pm_ops', the device run-time PM
fields of 'struct dev_pm_info' and the core helper functions provided for
run-time PM are described below.
2. Device Run-time PM Callbacks
There are three device run-time PM callbacks defined in 'struct dev_pm_ops':
struct dev_pm_ops {
...
int (*runtime_suspend)(struct device *dev);
int (*runtime_resume)(struct device *dev);
void (*runtime_idle)(struct device *dev);
...
};
The ->runtime_suspend() callback is executed by the PM core for the bus type of
the device being suspended. The bus type's callback is then _entirely_
_responsible_ for handling the device as appropriate, which may, but need not
include executing the device driver's own ->runtime_suspend() callback (from the
PM core's point of view it is not necessary to implement a ->runtime_suspend()
callback in a device driver as long as the bus type's ->runtime_suspend() knows
what to do to handle the device).
* Once the bus type's ->runtime_suspend() callback has completed successfully
for given device, the PM core regards the device as suspended, which need
not mean that the device has been put into a low power state. It is
supposed to mean, however, that the device will not process data and will
not communicate with the CPU(s) and RAM until its bus type's
->runtime_resume() callback is executed for it. The run-time PM status of
a device after successful execution of its bus type's ->runtime_suspend()
callback is 'suspended'.
* If the bus type's ->runtime_suspend() callback returns -EBUSY or -EAGAIN,
the device's run-time PM status is supposed to be 'active', which means that
the device _must_ be fully operational afterwards.
* If the bus type's ->runtime_suspend() callback returns an error code
different from -EBUSY or -EAGAIN, the PM core regards this as a fatal
error and will refuse to run the helper functions described in Section 4
for the device, until the status of it is directly set either to 'active'
or to 'suspended' (the PM core provides special helper functions for this
purpose).
In particular, if the driver requires remote wakeup capability for proper
functioning and device_may_wakeup() returns 'false' for the device, then
->runtime_suspend() should return -EBUSY. On the other hand, if
device_may_wakeup() returns 'true' for the device and the device is put
into a low power state during the execution of its bus type's
->runtime_suspend(), it is expected that remote wake-up (i.e. hardware mechanism
allowing the device to request a change of its power state, such as PCI PME)
will be enabled for the device. Generally, remote wake-up should be enabled
for all input devices put into a low power state at run time.
The ->runtime_resume() callback is executed by the PM core for the bus type of
the device being woken up. The bus type's callback is then _entirely_
_responsible_ for handling the device as appropriate, which may, but need not
include executing the device driver's own ->runtime_resume() callback (from the
PM core's point of view it is not necessary to implement a ->runtime_resume()
callback in a device driver as long as the bus type's ->runtime_resume() knows
what to do to handle the device).
* Once the bus type's ->runtime_resume() callback has completed successfully,
the PM core regards the device as fully operational, which means that the
device _must_ be able to complete I/O operations as needed. The run-time
PM status of the device is then 'active'.
* If the bus type's ->runtime_resume() callback returns an error code, the PM
core regards this as a fatal error and will refuse to run the helper
functions described in Section 4 for the device, until its status is
directly set either to 'active' or to 'suspended' (the PM core provides
special helper functions for this purpose).
The ->runtime_idle() callback is executed by the PM core for the bus type of
given device whenever the device appears to be idle, which is indicated to the
PM core by two counters, the device's usage counter and the counter of 'active'
children of the device.
* If any of these counters is decreased using a helper function provided by
the PM core and it turns out to be equal to zero, the other counter is
checked. If that counter also is equal to zero, the PM core executes the
device bus type's ->runtime_idle() callback (with the device as an
argument).
The action performed by a bus type's ->runtime_idle() callback is totally
dependent on the bus type in question, but the expected and recommended action
is to check if the device can be suspended (i.e. if all of the conditions
necessary for suspending the device are satisfied) and to queue up a suspend
request for the device in that case.
The helper functions provided by the PM core, described in Section 4, guarantee
that the following constraints are met with respect to the bus type's run-time
PM callbacks:
(1) The callbacks are mutually exclusive (e.g. it is forbidden to execute
->runtime_suspend() in parallel with ->runtime_resume() or with another
instance of ->runtime_suspend() for the same device) with the exception that
->runtime_suspend() or ->runtime_resume() can be executed in parallel with
->runtime_idle() (although ->runtime_idle() will not be started while any
of the other callbacks is being executed for the same device).
(2) ->runtime_idle() and ->runtime_suspend() can only be executed for 'active'
devices (i.e. the PM core will only execute ->runtime_idle() or
->runtime_suspend() for the devices the run-time PM status of which is
'active').
(3) ->runtime_idle() and ->runtime_suspend() can only be executed for a device
the usage counter of which is equal to zero _and_ either the counter of
'active' children of which is equal to zero, or the 'power.ignore_children'
flag of which is set.
(4) ->runtime_resume() can only be executed for 'suspended' devices (i.e. the
PM core will only execute ->runtime_resume() for the devices the run-time
PM status of which is 'suspended').
Additionally, the helper functions provided by the PM core obey the following
rules:
* If ->runtime_suspend() is about to be executed or there's a pending request
to execute it, ->runtime_idle() will not be executed for the same device.
* A request to execute or to schedule the execution of ->runtime_suspend()
will cancel any pending requests to execute ->runtime_idle() for the same
device.
* If ->runtime_resume() is about to be executed or there's a pending request
to execute it, the other callbacks will not be executed for the same device.
* A request to execute ->runtime_resume() will cancel any pending or
scheduled requests to execute the other callbacks for the same device.
3. Run-time PM Device Fields
The following device run-time PM fields are present in 'struct dev_pm_info', as
defined in include/linux/pm.h:
struct timer_list suspend_timer;
- timer used for scheduling (delayed) suspend request
unsigned long timer_expires;
- timer expiration time, in jiffies (if this is different from zero, the
timer is running and will expire at that time, otherwise the timer is not
running)
struct work_struct work;
- work structure used for queuing up requests (i.e. work items in pm_wq)
wait_queue_head_t wait_queue;
- wait queue used if any of the helper functions needs to wait for another
one to complete
spinlock_t lock;
- lock used for synchronisation
atomic_t usage_count;
- the usage counter of the device
atomic_t child_count;
- the count of 'active' children of the device
unsigned int ignore_children;
- if set, the value of child_count is ignored (but still updated)
unsigned int disable_depth;
- used for disabling the helper funcions (they work normally if this is
equal to zero); the initial value of it is 1 (i.e. run-time PM is
initially disabled for all devices)
unsigned int runtime_error;
- if set, there was a fatal error (one of the callbacks returned error code
as described in Section 2), so the helper funtions will not work until
this flag is cleared; this is the error code returned by the failing
callback
unsigned int idle_notification;
- if set, ->runtime_idle() is being executed
unsigned int request_pending;
- if set, there's a pending request (i.e. a work item queued up into pm_wq)
enum rpm_request request;
- type of request that's pending (valid if request_pending is set)
unsigned int deferred_resume;
- set if ->runtime_resume() is about to be run while ->runtime_suspend() is
being executed for that device and it is not practical to wait for the
suspend to complete; means "start a resume as soon as you've suspended"
enum rpm_status runtime_status;
- the run-time PM status of the device; this field's initial value is
RPM_SUSPENDED, which means that each device is initially regarded by the
PM core as 'suspended', regardless of its real hardware status
All of the above fields are members of the 'power' member of 'struct device'.
4. Run-time PM Device Helper Functions
The following run-time PM helper functions are defined in
drivers/base/power/runtime.c and include/linux/pm_runtime.h:
void pm_runtime_init(struct device *dev);
- initialize the device run-time PM fields in 'struct dev_pm_info'
void pm_runtime_remove(struct device *dev);
- make sure that the run-time PM of the device will be disabled after
removing the device from device hierarchy
int pm_runtime_idle(struct device *dev);
- execute ->runtime_idle() for the device's bus type; returns 0 on success
or error code on failure, where -EINPROGRESS means that ->runtime_idle()
is already being executed
int pm_runtime_suspend(struct device *dev);
- execute ->runtime_suspend() for the device's bus type; returns 0 on
success, 1 if the device's run-time PM status was already 'suspended', or
error code on failure, where -EAGAIN or -EBUSY means it is safe to attempt
to suspend the device again in future
int pm_runtime_resume(struct device *dev);
- execute ->runtime_resume() for the device's bus type; returns 0 on
success, 1 if the device's run-time PM status was already 'active' or
error code on failure, where -EAGAIN means it may be safe to attempt to
resume the device again in future, but 'power.runtime_error' should be
checked additionally
int pm_request_idle(struct device *dev);
- submit a request to execute ->runtime_idle() for the device's bus type
(the request is represented by a work item in pm_wq); returns 0 on success
or error code if the request has not been queued up
int pm_schedule_suspend(struct device *dev, unsigned int delay);
- schedule the execution of ->runtime_suspend() for the device's bus type
in future, where 'delay' is the time to wait before queuing up a suspend
work item in pm_wq, in milliseconds (if 'delay' is zero, the work item is
queued up immediately); returns 0 on success, 1 if the device's PM
run-time status was already 'suspended', or error code if the request
hasn't been scheduled (or queued up if 'delay' is 0); if the execution of
->runtime_suspend() is already scheduled and not yet expired, the new
value of 'delay' will be used as the time to wait
int pm_request_resume(struct device *dev);
- submit a request to execute ->runtime_resume() for the device's bus type
(the request is represented by a work item in pm_wq); returns 0 on
success, 1 if the device's run-time PM status was already 'active', or
error code if the request hasn't been queued up
void pm_runtime_get_noresume(struct device *dev);
- increment the device's usage counter
int pm_runtime_get(struct device *dev);
- increment the device's usage counter, run pm_request_resume(dev) and
return its result
int pm_runtime_get_sync(struct device *dev);
- increment the device's usage counter, run pm_runtime_resume(dev) and
return its result
void pm_runtime_put_noidle(struct device *dev);
- decrement the device's usage counter
int pm_runtime_put(struct device *dev);
- decrement the device's usage counter, run pm_request_idle(dev) and return
its result
int pm_runtime_put_sync(struct device *dev);
- decrement the device's usage counter, run pm_runtime_idle(dev) and return
its result
void pm_runtime_enable(struct device *dev);
- enable the run-time PM helper functions to run the device bus type's
run-time PM callbacks described in Section 2
int pm_runtime_disable(struct device *dev);
- prevent the run-time PM helper functions from running the device bus
type's run-time PM callbacks, make sure that all of the pending run-time
PM operations on the device are either completed or canceled; returns
1 if there was a resume request pending and it was necessary to execute
->runtime_resume() for the device's bus type to satisfy that request,
otherwise 0 is returned
void pm_suspend_ignore_children(struct device *dev, bool enable);
- set/unset the power.ignore_children flag of the device
int pm_runtime_set_active(struct device *dev);
- clear the device's 'power.runtime_error' flag, set the device's run-time
PM status to 'active' and update its parent's counter of 'active'
children as appropriate (it is only valid to use this function if
'power.runtime_error' is set or 'power.disable_depth' is greater than
zero); it will fail and return error code if the device has a parent
which is not active and the 'power.ignore_children' flag of which is unset
void pm_runtime_set_suspended(struct device *dev);
- clear the device's 'power.runtime_error' flag, set the device's run-time
PM status to 'suspended' and update its parent's counter of 'active'
children as appropriate (it is only valid to use this function if
'power.runtime_error' is set or 'power.disable_depth' is greater than
zero)
It is safe to execute the following helper functions from interrupt context:
pm_request_idle()
pm_schedule_suspend()
pm_request_resume()
pm_runtime_get_noresume()
pm_runtime_get()
pm_runtime_put_noidle()
pm_runtime_put()
pm_suspend_ignore_children()
pm_runtime_set_active()
pm_runtime_set_suspended()
pm_runtime_enable()
5. Run-time PM Initialization, Device Probing and Removal
Initially, the run-time PM is disabled for all devices, which means that the
majority of the run-time PM helper funtions described in Section 4 will return
-EAGAIN until pm_runtime_enable() is called for the device.
In addition to that, the initial run-time PM status of all devices is
'suspended', but it need not reflect the actual physical state of the device.
Thus, if the device is initially active (i.e. it is able to process I/O), its
run-time PM status must be changed to 'active', with the help of
pm_runtime_set_active(), before pm_runtime_enable() is called for the device.
However, if the device has a parent and the parent's run-time PM is enabled,
calling pm_runtime_set_active() for the device will affect the parent, unless
the parent's 'power.ignore_children' flag is set. Namely, in that case the
parent won't be able to suspend at run time, using the PM core's helper
functions, as long as the child's status is 'active', even if the child's
run-time PM is still disabled (i.e. pm_runtime_enable() hasn't been called for
the child yet or pm_runtime_disable() has been called for it). For this reason,
once pm_runtime_set_active() has been called for the device, pm_runtime_enable()
should be called for it too as soon as reasonably possible or its run-time PM
status should be changed back to 'suspended' with the help of
pm_runtime_set_suspended().
If the default initial run-time PM status of the device (i.e. 'suspended')
reflects the actual state of the device, its bus type's or its driver's
->probe() callback will likely need to wake it up using one of the PM core's
helper functions described in Section 4. In that case, pm_runtime_resume()
should be used. Of course, for this purpose the device's run-time PM has to be
enabled earlier by calling pm_runtime_enable().
If the device bus type's or driver's ->probe() or ->remove() callback runs
pm_runtime_suspend() or pm_runtime_idle() or their asynchronous counterparts,
they will fail returning -EAGAIN, because the device's usage counter is
incremented by the core before executing ->probe() and ->remove(). Still, it
may be desirable to suspend the device as soon as ->probe() or ->remove() has
finished, so the PM core uses pm_runtime_idle_sync() to invoke the device bus
type's ->runtime_idle() callback at that time.
Documentation/s390/s390dbf.txt
浏览文件 @ 45bd00d3
......@@ -495,6 +495,13 @@ and for each vararg a long value. So e.g. for a debug entry with a format
string plus two varargs one would need to allocate a (3 * sizeof(long))
byte data area in the debug_register() function.
IMPORTANT: Using "%s" in sprintf event functions is dangerous. You can only
use "%s" in the sprintf event functions, if the memory for the passed string is
available as long as the debug feature exists. The reason behind this is that
due to performance considerations only a pointer to the string is stored in
the debug feature. If you log a string that is freed afterwards, you will get
an OOPS when inspecting the debug feature, because then the debug feature will
access the already freed memory.
NOTE: If using the sprintf view do NOT use other event/exception functions
than the sprintf-event and -exception functions.
......
Documentation/sound/alsa/ALSA-Configuration.txt
浏览文件 @ 45bd00d3
......@@ -60,6 +60,12 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
slots - Reserve the slot index for the given driver.
This option takes multiple strings.
See "Module Autoloading Support" section for details.
debug - Specifies the debug message level
(0 = disable debug prints, 1 = normal debug messages,
2 = verbose debug messages)
This option appears only when CONFIG_SND_DEBUG=y.
This option can be dynamically changed via sysfs
/sys/modules/snd/parameters/debug file.
Module snd-pcm-oss
------------------
......@@ -513,6 +519,26 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
or input, but you may use this module for any application which
requires a sound card (like RealPlayer).
pcm_devs - Number of PCM devices assigned to each card
(default = 1, up to 4)
pcm_substreams - Number of PCM substreams assigned to each PCM
(default = 8, up to 16)
hrtimer - Use hrtimer (=1, default) or system timer (=0)
fake_buffer - Fake buffer allocations (default = 1)
When multiple PCM devices are created, snd-dummy gives different
behavior to each PCM device:
0 = interleaved with mmap support
1 = non-interleaved with mmap support
2 = interleaved without mmap
3 = non-interleaved without mmap
As default, snd-dummy drivers doesn't allocate the real buffers
but either ignores read/write or mmap a single dummy page to all
buffer pages, in order to save the resouces. If your apps need
the read/ written buffer data to be consistent, pass fake_buffer=0
option.
The power-management is supported.
Module snd-echo3g
......@@ -768,6 +794,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
bdl_pos_adj - Specifies the DMA IRQ timing delay in samples.
Passing -1 will make the driver to choose the appropriate
value based on the controller chip.
patch - Specifies the early "patch" files to modify the HD-audio
setup before initializing the codecs. This option is
available only when CONFIG_SND_HDA_PATCH_LOADER=y is set.
See HD-Audio.txt for details.
[Single (global) options]
single_cmd - Use single immediate commands to communicate with
......
Documentation/sound/alsa/HD-Audio-Models.txt
浏览文件 @ 45bd00d3
......@@ -114,8 +114,8 @@ ALC662/663/272
samsung-nc10 Samsung NC10 mini notebook
auto auto-config reading BIOS (default)
ALC882/885
==========
ALC882/883/885/888/889
======================
3stack-dig 3-jack with SPDIF I/O
6stack-dig 6-jack digital with SPDIF I/O
arima Arima W820Di1
......@@ -127,12 +127,8 @@ ALC882/885
mbp3 Macbook Pro rev3
imac24 iMac 24'' with jack detection
w2jc ASUS W2JC
auto auto-config reading BIOS (default)
ALC883/888
==========
3stack-dig 3-jack with SPDIF I/O
6stack-dig 6-jack digital with SPDIF I/O
3stack-2ch-dig 3-jack with SPDIF I/O (ALC883)
alc883-6stack-dig 6-jack digital with SPDIF I/O (ALC883)
3stack-6ch 3-jack 6-channel
3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
6stack-dig-demo 6-jack digital for Intel demo board
......@@ -140,6 +136,7 @@ ALC883/888
acer-aspire Acer Aspire 9810
acer-aspire-4930g Acer Aspire 4930G
acer-aspire-6530g Acer Aspire 6530G
acer-aspire-7730g Acer Aspire 7730G
acer-aspire-8930g Acer Aspire 8930G
medion Medion Laptops
medion-md2 Medion MD2
......@@ -155,10 +152,13 @@ ALC883/888
3stack-hp HP machines with 3stack (Lucknow, Samba boards)
6stack-dell Dell machines with 6stack (Inspiron 530)
mitac Mitac 8252D
clevo-m540r Clevo M540R (6ch + digital)
clevo-m720 Clevo M720 laptop series
fujitsu-pi2515 Fujitsu AMILO Pi2515
fujitsu-xa3530 Fujitsu AMILO XA3530
3stack-6ch-intel Intel DG33* boards
intel-alc889a Intel IbexPeak with ALC889A
intel-x58 Intel DX58 with ALC889
asus-p5q ASUS P5Q-EM boards
mb31 MacBook 3,1
sony-vaio-tt Sony VAIO TT
......@@ -229,7 +229,7 @@ AD1984
======
basic default configuration
thinkpad Lenovo Thinkpad T61/X61
dell Dell T3400
dell_desktop Dell T3400
AD1986A
=======
......@@ -258,6 +258,7 @@ Conexant 5045
laptop-micsense Laptop with Mic sense (old model fujitsu)
laptop-hpmicsense Laptop with HP and Mic senses
benq Benq R55E
laptop-hp530 HP 530 laptop
test for testing/debugging purpose, almost all controls
can be adjusted. Appearing only when compiled with
$CONFIG_SND_DEBUG=y
......@@ -278,9 +279,16 @@ Conexant 5051
hp-dv6736 HP dv6736
lenovo-x200 Lenovo X200 laptop
Conexant 5066
=============
laptop Basic Laptop config (default)
dell-laptop Dell laptops
olpc-xo-1_5 OLPC XO 1.5
STAC9200
========
ref Reference board
oqo OQO Model 2
dell-d21 Dell (unknown)
dell-d22 Dell (unknown)
dell-d23 Dell (unknown)
......@@ -368,10 +376,12 @@ STAC92HD73*
===========
ref Reference board
no-jd BIOS setup but without jack-detection
intel Intel DG45* mobos
dell-m6-amic Dell desktops/laptops with analog mics
dell-m6-dmic Dell desktops/laptops with digital mics
dell-m6 Dell desktops/laptops with both type of mics
dell-eq Dell desktops/laptops
alienware Alienware M17x
auto BIOS setup (default)
STAC92HD83*
......@@ -385,3 +395,8 @@ STAC9872
========
vaio VAIO laptop without SPDIF
auto BIOS setup (default)
Cirrus Logic CS4206/4207
========================
mbp55 MacBook Pro 5,5
auto BIOS setup (default)
Documentation/sound/alsa/HD-Audio.txt
浏览文件 @ 45bd00d3
......@@ -138,6 +138,10 @@ override the BIOS setup or to provide more comprehensive features.
The driver checks PCI SSID and looks through the static configuration
table until any matching entry is found. If you have a new machine,
you may see a message like below:
------------------------------------------------------------------------
hda_codec: ALC880: BIOS auto-probing.
------------------------------------------------------------------------
Meanwhile, in the earlier versions, you would see a message like:
------------------------------------------------------------------------
hda_codec: Unknown model for ALC880, trying auto-probe from BIOS...
------------------------------------------------------------------------
......@@ -403,6 +407,66 @@ re-configure based on that state, run like below:
------------------------------------------------------------------------
Early Patching
~~~~~~~~~~~~~~
When CONFIG_SND_HDA_PATCH_LOADER=y is set, you can pass a "patch" as a
firmware file for modifying the HD-audio setup before initializing the
codec. This can work basically like the reconfiguration via sysfs in
the above, but it does it before the first codec configuration.
A patch file is a plain text file which looks like below:
------------------------------------------------------------------------
[codec]
0x12345678 0xabcd1234 2
[model]
auto
[pincfg]
0x12 0x411111f0
[verb]
0x20 0x500 0x03
0x20 0x400 0xff
[hint]
hp_detect = yes
------------------------------------------------------------------------
The file needs to have a line `[codec]`. The next line should contain
three numbers indicating the codec vendor-id (0x12345678 in the
example), the codec subsystem-id (0xabcd1234) and the address (2) of
the codec. The rest patch entries are applied to this specified codec
until another codec entry is given.
The `[model]` line allows to change the model name of the each codec.
In the example above, it will be changed to model=auto.
Note that this overrides the module option.
After the `[pincfg]` line, the contents are parsed as the initial
default pin-configurations just like `user_pin_configs` sysfs above.
The values can be shown in user_pin_configs sysfs file, too.
Similarly, the lines after `[verb]` are parsed as `init_verbs`
sysfs entries, and the lines after `[hint]` are parsed as `hints`
sysfs entries, respectively.
The hd-audio driver reads the file via request_firmware(). Thus,
a patch file has to be located on the appropriate firmware path,
typically, /lib/firmware. For example, when you pass the option
`patch=hda-init.fw`, the file /lib/firmware/hda-init-fw must be
present.
The patch module option is specific to each card instance, and you
need to give one file name for each instance, separated by commas.
For example, if you have two cards, one for an on-board analog and one
for an HDMI video board, you may pass patch option like below:
------------------------------------------------------------------------
options snd-hda-intel patch=on-board-patch,hdmi-patch
------------------------------------------------------------------------
Power-Saving
~~~~~~~~~~~~
The power-saving is a kind of auto-suspend of the device. When the
......
Documentation/sysctl/kernel.txt
浏览文件 @ 45bd00d3
......@@ -19,6 +19,7 @@ Currently, these files might (depending on your configuration)
show up in /proc/sys/kernel:
- acpi_video_flags
- acct
- callhome [ S390 only ]
- auto_msgmni
- core_pattern
- core_uses_pid
......@@ -91,6 +92,21 @@ valid for 30 seconds.
==============================================================
callhome:
Controls the kernel's callhome behavior in case of a kernel panic.
The s390 hardware allows an operating system to send a notification
to a service organization (callhome) in case of an operating system panic.
When the value in this file is 0 (which is the default behavior)
nothing happens in case of a kernel panic. If this value is set to "1"
the complete kernel oops message is send to the IBM customer service
organization in case the mainframe the Linux operating system is running
on has a service contract with IBM.
==============================================================
core_pattern:
core_pattern is used to specify a core dumpfile pattern name.
......
Documentation/trace/events.txt
浏览文件 @ 45bd00d3
......@@ -22,12 +22,12 @@ tracing information should be printed.
---------------------------------
The events which are available for tracing can be found in the file
/debug/tracing/available_events.
/sys/kernel/debug/tracing/available_events.
To enable a particular event, such as 'sched_wakeup', simply echo it
to /debug/tracing/set_event. For example:
to /sys/kernel/debug/tracing/set_event. For example:
# echo sched_wakeup >> /debug/tracing/set_event
# echo sched_wakeup >> /sys/kernel/debug/tracing/set_event
[ Note: '>>' is necessary, otherwise it will firstly disable
all the events. ]
......@@ -35,15 +35,15 @@ to /debug/tracing/set_event. For example:
To disable an event, echo the event name to the set_event file prefixed
with an exclamation point:
# echo '!sched_wakeup' >> /debug/tracing/set_event
# echo '!sched_wakeup' >> /sys/kernel/debug/tracing/set_event
To disable all events, echo an empty line to the set_event file:
# echo > /debug/tracing/set_event
# echo > /sys/kernel/debug/tracing/set_event
To enable all events, echo '*:*' or '*:' to the set_event file:
# echo *:* > /debug/tracing/set_event
# echo *:* > /sys/kernel/debug/tracing/set_event
The events are organized into subsystems, such as ext4, irq, sched,
etc., and a full event name looks like this: <subsystem>:<event>. The
......@@ -52,29 +52,29 @@ file. All of the events in a subsystem can be specified via the syntax
"<subsystem>:*"; for example, to enable all irq events, you can use the
command:
# echo 'irq:*' > /debug/tracing/set_event
# echo 'irq:*' > /sys/kernel/debug/tracing/set_event
2.2 Via the 'enable' toggle
---------------------------
The events available are also listed in /debug/tracing/events/ hierarchy
The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy
of directories.
To enable event 'sched_wakeup':
# echo 1 > /debug/tracing/events/sched/sched_wakeup/enable
# echo 1 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
To disable it:
# echo 0 > /debug/tracing/events/sched/sched_wakeup/enable
# echo 0 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
To enable all events in sched subsystem:
# echo 1 > /debug/tracing/events/sched/enable
# echo 1 > /sys/kernel/debug/tracing/events/sched/enable
To eanble all events:
# echo 1 > /debug/tracing/events/enable
# echo 1 > /sys/kernel/debug/tracing/events/enable
When reading one of these enable files, there are four results:
......
Documentation/vgaarbiter.txt 0 → 100644
浏览文件 @ 45bd00d3
VGA Arbiter
===========
Graphic devices are accessed through ranges in I/O or memory space. While most
modern devices allow relocation of such ranges, some "Legacy" VGA devices
implemented on PCI will typically have the same "hard-decoded" addresses as
they did on ISA. For more details see "PCI Bus Binding to IEEE Std 1275-1994
Standard for Boot (Initialization Configuration) Firmware Revision 2.1"
Section 7, Legacy Devices.
The Resource Access Control (RAC) module inside the X server [0] existed for
the legacy VGA arbitration task (besides other bus management tasks) when more
than one legacy device co-exists on the same machine. But the problem happens
when these devices are trying to be accessed by different userspace clients
(e.g. two server in parallel). Their address assignments conflict. Moreover,
ideally, being an userspace application, it is not the role of the the X
server to control bus resources. Therefore an arbitration scheme outside of
the X server is needed to control the sharing of these resources. This
document introduces the operation of the VGA arbiter implemented for Linux
kernel.
----------------------------------------------------------------------------
I. Details and Theory of Operation
I.1 vgaarb
I.2 libpciaccess
I.3 xf86VGAArbiter (X server implementation)
II. Credits
III.References
I. Details and Theory of Operation
==================================
I.1 vgaarb
----------
The vgaarb is a module of the Linux Kernel. When it is initially loaded, it
scans all PCI devices and adds the VGA ones inside the arbitration. The
arbiter then enables/disables the decoding on different devices of the VGA
legacy instructions. Device which do not want/need to use the arbiter may
explicitly tell it by calling vga_set_legacy_decoding().
The kernel exports a char device interface (/dev/vga_arbiter) to the clients,
which has the following semantics:
open : open user instance of the arbiter. By default, it's attached to
the default VGA device of the system.
close : close user instance. Release locks made by the user
read : return a string indicating the status of the target like:
"<card_ID>,decodes=<io_state>,owns=<io_state>,locks=<io_state> (ic,mc)"
An IO state string is of the form {io,mem,io+mem,none}, mc and
ic are respectively mem and io lock counts (for debugging/
diagnostic only). "decodes" indicate what the card currently
decodes, "owns" indicates what is currently enabled on it, and
"locks" indicates what is locked by this card. If the card is
unplugged, we get "invalid" then for card_ID and an -ENODEV
error is returned for any command until a new card is targeted.
write : write a command to the arbiter. List of commands:
target <card_ID> : switch target to card <card_ID> (see below)
lock <io_state> : acquires locks on target ("none" is an invalid io_state)
trylock <io_state> : non-blocking acquire locks on target (returns EBUSY if
unsuccessful)
unlock <io_state> : release locks on target
unlock all : release all locks on target held by this user (not
implemented yet)
decodes <io_state> : set the legacy decoding attributes for the card
poll : event if something changes on any card (not just the
target)
card_ID is of the form "PCI:domain:bus:dev.fn". It can be set to "default"
to go back to the system default card (TODO: not implemented yet). Currently,
only PCI is supported as a prefix, but the userland API may support other bus
types in the future, even if the current kernel implementation doesn't.
Note about locks:
The driver keeps track of which user has which locks on which card. It
supports stacking, like the kernel one. This complexifies the implementation
a bit, but makes the arbiter more tolerant to user space problems and able
to properly cleanup in all cases when a process dies.
Currently, a max of 16 cards can have locks simultaneously issued from
user space for a given user (file descriptor instance) of the arbiter.
In the case of devices hot-{un,}plugged, there is a hook - pci_notify() - to
notify them being added/removed in the system and automatically added/removed
in the arbiter.
There's also a in-kernel API of the arbiter in the case of DRM, vgacon and
others which may use the arbiter.
I.2 libpciaccess
----------------
To use the vga arbiter char device it was implemented an API inside the
libpciaccess library. One fieldd was added to struct pci_device (each device
on the system):
/* the type of resource decoded by the device */
int vgaarb_rsrc;
Besides it, in pci_system were added:
int vgaarb_fd;
int vga_count;
struct pci_device *vga_target;
struct pci_device *vga_default_dev;
The vga_count is usually need to keep informed how many cards are being
arbitrated, so for instance if there's only one then it can totally escape the
scheme.
These functions below acquire VGA resources for the given card and mark those
resources as locked. If the resources requested are "normal" (and not legacy)
resources, the arbiter will first check whether the card is doing legacy
decoding for that type of resource. If yes, the lock is "converted" into a
legacy resource lock. The arbiter will first look for all VGA cards that
might conflict and disable their IOs and/or Memory access, including VGA
forwarding on P2P bridges if necessary, so that the requested resources can
be used. Then, the card is marked as locking these resources and the IO and/or
Memory access is enabled on the card (including VGA forwarding on parent
P2P bridges if any). In the case of vga_arb_lock(), the function will block
if some conflicting card is already locking one of the required resources (or
any resource on a different bus segment, since P2P bridges don't differentiate
VGA memory and IO afaik). If the card already owns the resources, the function
succeeds. vga_arb_trylock() will return (-EBUSY) instead of blocking. Nested
calls are supported (a per-resource counter is maintained).
Set the target device of this client.
int pci_device_vgaarb_set_target (struct pci_device *dev);
For instance, in x86 if two devices on the same bus want to lock different
resources, both will succeed (lock). If devices are in different buses and
trying to lock different resources, only the first who tried succeeds.
int pci_device_vgaarb_lock (void);
int pci_device_vgaarb_trylock (void);
Unlock resources of device.
int pci_device_vgaarb_unlock (void);
Indicates to the arbiter if the card decodes legacy VGA IOs, legacy VGA
Memory, both, or none. All cards default to both, the card driver (fbdev for
example) should tell the arbiter if it has disabled legacy decoding, so the
card can be left out of the arbitration process (and can be safe to take
interrupts at any time.
int pci_device_vgaarb_decodes (int new_vgaarb_rsrc);
Connects to the arbiter device, allocates the struct
int pci_device_vgaarb_init (void);
Close the connection
void pci_device_vgaarb_fini (void);
I.3 xf86VGAArbiter (X server implementation)
--------------------------------------------
(TODO)
X server basically wraps all the functions that touch VGA registers somehow.
II. Credits
===========
Benjamin Herrenschmidt (IBM?) started this work when he discussed such design
with the Xorg community in 2005 [1, 2]. In the end of 2007, Paulo Zanoni and
Tiago Vignatti (both of C3SL/Federal University of Paraná) proceeded his work
enhancing the kernel code to adapt as a kernel module and also did the
implementation of the user space side [3]. Now (2009) Tiago Vignatti and Dave
Airlie finally put this work in shape and queued to Jesse Barnes' PCI tree.
III. References
==============
[0] http://cgit.freedesktop.org/xorg/xserver/commit/?id=4b42448a2388d40f257774fbffdccaea87bd0347
[1] http://lists.freedesktop.org/archives/xorg/2005-March/006663.html
[2] http://lists.freedesktop.org/archives/xorg/2005-March/006745.html
[3] http://lists.freedesktop.org/archives/xorg/2007-October/029507.html
Documentation/video4linux/CARDLIST.cx23885
浏览文件 @ 45bd00d3
......@@ -21,3 +21,5 @@
20 -> Hauppauge WinTV-HVR1255 [0070:2251]
21 -> Hauppauge WinTV-HVR1210 [0070:2291,0070:2295]
22 -> Mygica X8506 DMB-TH [14f1:8651]
23 -> Magic-Pro ProHDTV Extreme 2 [14f1:8657]
24 -> Hauppauge WinTV-HVR1850 [0070:8541]
Documentation/video4linux/CARDLIST.cx88
浏览文件 @ 45bd00d3
......@@ -80,3 +80,4 @@
79 -> Terratec Cinergy HT PCI MKII [153b:1177]
80 -> Hauppauge WinTV-IR Only [0070:9290]
81 -> Leadtek WinFast DTV1800 Hybrid [107d:6654]
82 -> WinFast DTV2000 H rev. J [107d:6f2b]
Documentation/video4linux/CARDLIST.em28xx
浏览文件 @ 45bd00d3
......@@ -7,7 +7,7 @@
6 -> Terratec Cinergy 200 USB (em2800)
7 -> Leadtek Winfast USB II (em2800) [0413:6023]
8 -> Kworld USB2800 (em2800)
9 -> Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker (em2820/em2840) [1b80:e302,2304:0207,2304:021a]
9 -> Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker (em2820/em2840) [1b80:e302,1b80:e304,2304:0207,2304:021a]
10 -> Hauppauge WinTV HVR 900 (em2880) [2040:6500]
11 -> Terratec Hybrid XS (em2880) [0ccd:0042]
12 -> Kworld PVR TV 2800 RF (em2820/em2840)
......@@ -33,7 +33,7 @@
34 -> Terratec Cinergy A Hybrid XS (em2860) [0ccd:004f]
35 -> Typhoon DVD Maker (em2860)
36 -> NetGMBH Cam (em2860)
37 -> Gadmei UTV330 (em2860)
37 -> Gadmei UTV330 (em2860) [eb1a:50a6]
38 -> Yakumo MovieMixer (em2861)
39 -> KWorld PVRTV 300U (em2861) [eb1a:e300]
40 -> Plextor ConvertX PX-TV100U (em2861) [093b:a005]
......@@ -67,3 +67,4 @@
69 -> KWorld ATSC 315U HDTV TV Box (em2882) [eb1a:a313]
70 -> Evga inDtube (em2882)
71 -> Silvercrest Webcam 1.3mpix (em2820/em2840)
72 -> Gadmei UTV330+ (em2861)
Documentation/video4linux/CARDLIST.saa7134
浏览文件 @ 45bd00d3
......@@ -167,3 +167,7 @@
166 -> Beholder BeholdTV 607 RDS [5ace:6073]
167 -> Beholder BeholdTV 609 RDS [5ace:6092]
168 -> Beholder BeholdTV 609 RDS [5ace:6093]
169 -> Compro VideoMate S350/S300 [185b:c900]
170 -> AverMedia AverTV Studio 505 [1461:a115]
171 -> Beholder BeholdTV X7 [5ace:7595]
172 -> RoverMedia TV Link Pro FM [19d1:0138]
Documentation/video4linux/CARDLIST.tuner
浏览文件 @ 45bd00d3
......@@ -78,3 +78,4 @@ tuner=77 - TCL tuner MF02GIP-5N-E
tuner=78 - Philips FMD1216MEX MK3 Hybrid Tuner
tuner=79 - Philips PAL/SECAM multi (FM1216 MK5)
tuner=80 - Philips FQ1216LME MK3 PAL/SECAM w/active loopthrough
tuner=81 - Partsnic (Daewoo) PTI-5NF05
Documentation/video4linux/CQcam.txt
浏览文件 @ 45bd00d3
......@@ -18,8 +18,8 @@ Table of Contents
1.0 Introduction
The file ../drivers/char/c-qcam.c is a device driver for the
Logitech (nee Connectix) parallel port interface color CCD camera.
The file ../../drivers/media/video/c-qcam.c is a device driver for
the Logitech (nee Connectix) parallel port interface color CCD camera.
This is a fairly inexpensive device for capturing images. Logitech
does not currently provide information for developers, but many people
have engineered several solutions for non-Microsoft use of the Color
......
Documentation/video4linux/gspca.txt
浏览文件 @ 45bd00d3
......@@ -140,6 +140,7 @@ spca500 04fc:7333 PalmPixDC85
sunplus 04fc:ffff Pure DigitalDakota
spca501 0506:00df 3Com HomeConnect Lite
sunplus 052b:1513 Megapix V4
sunplus 052b:1803 MegaImage VI
tv8532 0545:808b Veo Stingray
tv8532 0545:8333 Veo Stingray
sunplus 0546:3155 Polaroid PDC3070
......@@ -182,6 +183,7 @@ ov534 06f8:3002 Hercules Blog Webcam
ov534 06f8:3003 Hercules Dualpix HD Weblog
sonixj 06f8:3004 Hercules Classic Silver
sonixj 06f8:3008 Hercules Deluxe Optical Glass
pac7311 06f8:3009 Hercules Classic Link
spca508 0733:0110 ViewQuest VQ110
spca508 0130:0130 Clone Digital Webcam 11043
spca501 0733:0401 Intel Create and Share
......@@ -235,8 +237,10 @@ pac7311 093a:2621 PAC731x
pac7311 093a:2622 Genius Eye 312
pac7311 093a:2624 PAC7302
pac7311 093a:2626 Labtec 2200
pac7311 093a:2629 Genious iSlim 300
pac7311 093a:262a Webcam 300k
pac7311 093a:262c Philips SPC 230 NC
jeilinj 0979:0280 Sakar 57379
zc3xx 0ac8:0302 Z-star Vimicro zc0302
vc032x 0ac8:0321 Vimicro generic vc0321
vc032x 0ac8:0323 Vimicro Vc0323
......@@ -247,6 +251,7 @@ zc3xx 0ac8:305b Z-star Vimicro zc0305b
zc3xx 0ac8:307b Ldlc VC302+Ov7620
vc032x 0ac8:c001 Sony embedded vimicro
vc032x 0ac8:c002 Sony embedded vimicro
vc032x 0ac8:c301 Samsung Q1 Ultra Premium
spca508 0af9:0010 Hama USB Sightcam 100
spca508 0af9:0011 Hama USB Sightcam 100
sonixb 0c45:6001 Genius VideoCAM NB
......@@ -284,6 +289,7 @@ sonixj 0c45:613a Microdia Sonix PC Camera
sonixj 0c45:613b Surfer SN-206
sonixj 0c45:613c Sonix Pccam168
sonixj 0c45:6143 Sonix Pccam168
sonixj 0c45:6148 Digitus DA-70811/ZSMC USB PC Camera ZS211/Microdia
sn9c20x 0c45:6240 PC Camera (SN9C201 + MT9M001)
sn9c20x 0c45:6242 PC Camera (SN9C201 + MT9M111)
sn9c20x 0c45:6248 PC Camera (SN9C201 + OV9655)
......
Documentation/video4linux/si4713.txt 0 → 100644
浏览文件 @ 45bd00d3
Driver for I2C radios for the Silicon Labs Si4713 FM Radio Transmitters
Copyright (c) 2009 Nokia Corporation
Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
Information about the Device
============================
This chip is a Silicon Labs product. It is a I2C device, currently on 0x63 address.
Basically, it has transmission and signal noise level measurement features.
The Si4713 integrates transmit functions for FM broadcast stereo transmission.
The chip also allows integrated receive power scanning to identify low signal
power FM channels.
The chip is programmed using commands and responses. There are also several
properties which can change the behavior of this chip.
Users must comply with local regulations on radio frequency (RF) transmission.
Device driver description
=========================
There are two modules to handle this device. One is a I2C device driver
and the other is a platform driver.
The I2C device driver exports a v4l2-subdev interface to the kernel.
All properties can also be accessed by v4l2 extended controls interface, by
using the v4l2-subdev calls (g_ext_ctrls, s_ext_ctrls).
The platform device driver exports a v4l2 radio device interface to user land.
So, it uses the I2C device driver as a sub device in order to send the user
commands to the actual device. Basically it is a wrapper to the I2C device driver.
Applications can use v4l2 radio API to specify frequency of operation, mute state,
etc. But mostly of its properties will be present in the extended controls.
When the v4l2 mute property is set to 1 (true), the driver will turn the chip off.
Properties description
======================
The properties can be accessed using v4l2 extended controls.
Here is an output from v4l2-ctl util:
/ # v4l2-ctl -d /dev/radio0 --all -L
Driver Info:
Driver name : radio-si4713
Card type : Silicon Labs Si4713 Modulator
Bus info :
Driver version: 0
Capabilities : 0x00080800
RDS Output
Modulator
Audio output: 0 (FM Modulator Audio Out)
Frequency: 1408000 (88.000000 MHz)
Video Standard = 0x00000000
Modulator:
Name : FM Modulator
Capabilities : 62.5 Hz stereo rds
Frequency range : 76.0 MHz - 108.0 MHz
Subchannel modulation: stereo+rds
User Controls
mute (bool) : default=1 value=0
FM Radio Modulator Controls
rds_signal_deviation (int) : min=0 max=90000 step=10 default=200 value=200 flags=slider
rds_program_id (int) : min=0 max=65535 step=1 default=0 value=0
rds_program_type (int) : min=0 max=31 step=1 default=0 value=0
rds_ps_name (str) : min=0 max=96 step=8 value='si4713 '
rds_radio_text (str) : min=0 max=384 step=32 value=''
audio_limiter_feature_enabled (bool) : default=1 value=1
audio_limiter_release_time (int) : min=250 max=102390 step=50 default=5010 value=5010 flags=slider
audio_limiter_deviation (int) : min=0 max=90000 step=10 default=66250 value=66250 flags=slider
audio_compression_feature_enabl (bool) : default=1 value=1
audio_compression_gain (int) : min=0 max=20 step=1 default=15 value=15 flags=slider
audio_compression_threshold (int) : min=-40 max=0 step=1 default=-40 value=-40 flags=slider
audio_compression_attack_time (int) : min=0 max=5000 step=500 default=0 value=0 flags=slider
audio_compression_release_time (int) : min=100000 max=1000000 step=100000 default=1000000 value=1000000 flags=slider
pilot_tone_feature_enabled (bool) : default=1 value=1
pilot_tone_deviation (int) : min=0 max=90000 step=10 default=6750 value=6750 flags=slider
pilot_tone_frequency (int) : min=0 max=19000 step=1 default=19000 value=19000 flags=slider
pre_emphasis_settings (menu) : min=0 max=2 default=1 value=1
tune_power_level (int) : min=0 max=120 step=1 default=88 value=88 flags=slider
tune_antenna_capacitor (int) : min=0 max=191 step=1 default=0 value=110 flags=slider
/ #
Here is a summary of them:
* Pilot is an audible tone sent by the device.
pilot_frequency - Configures the frequency of the stereo pilot tone.
pilot_deviation - Configures pilot tone frequency deviation level.
pilot_enabled - Enables or disables the pilot tone feature.
* The si4713 device is capable of applying audio compression to the transmitted signal.
acomp_enabled - Enables or disables the audio dynamic range control feature.
acomp_gain - Sets the gain for audio dynamic range control.
acomp_threshold - Sets the threshold level for audio dynamic range control.
acomp_attack_time - Sets the attack time for audio dynamic range control.
acomp_release_time - Sets the release time for audio dynamic range control.
* Limiter setups audio deviation limiter feature. Once a over deviation occurs,
it is possible to adjust the front-end gain of the audio input and always
prevent over deviation.
limiter_enabled - Enables or disables the limiter feature.
limiter_deviation - Configures audio frequency deviation level.
limiter_release_time - Sets the limiter release time.
* Tuning power
power_level - Sets the output power level for signal transmission.
antenna_capacitor - This selects the value of antenna tuning capacitor manually
or automatically if set to zero.
* RDS related
rds_ps_name - Sets the RDS ps name field for transmission.
rds_radio_text - Sets the RDS radio text for transmission.
rds_pi - Sets the RDS PI field for transmission.
rds_pty - Sets the RDS PTY field for transmission.
* Region related
preemphasis - sets the preemphasis to be applied for transmission.
RNL
===
This device also has an interface to measure received noise level. To do that, you should
ioctl the device node. Here is an code of example:
int main (int argc, char *argv[])
{
struct si4713_rnl rnl;
int fd = open("/dev/radio0", O_RDWR);
int rval;
if (argc < 2)
return -EINVAL;
if (fd < 0)
return fd;
sscanf(argv[1], "%d", &rnl.frequency);
rval = ioctl(fd, SI4713_IOC_MEASURE_RNL, &rnl);
if (rval < 0)
return rval;
printf("received noise level: %d\n", rnl.rnl);
close(fd);
}
The struct si4713_rnl and SI4713_IOC_MEASURE_RNL are defined under
include/media/si4713.h.
Stereo/Mono and RDS subchannels
===============================
The device can also be configured using the available sub channels for
transmission. To do that use S/G_MODULATOR ioctl and configure txsubchans properly.
Refer to v4l2-spec for proper use of this ioctl.
Testing
=======
Testing is usually done with v4l2-ctl utility for managing FM tuner cards.
The tool can be found in v4l-dvb repository under v4l2-apps/util directory.
Example for setting rds ps name:
# v4l2-ctl -d /dev/radio0 --set-ctrl=rds_ps_name="Dummy"
Documentation/vm/slub.txt
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P Poisoning (object and padding)
U User tracking (free and alloc)
T Trace (please only use on single slabs)
O Switch debugging off for caches that would have
caused higher minimum slab orders
- Switch all debugging off (useful if the kernel is
configured with CONFIG_SLUB_DEBUG_ON)
......@@ -59,6 +61,14 @@ to the dentry cache with
slub_debug=F,dentry
Debugging options may require the minimum possible slab order to increase as
a result of storing the metadata (for example, caches with PAGE_SIZE object
sizes). This has a higher liklihood of resulting in slab allocation errors
in low memory situations or if there's high fragmentation of memory. To
switch off debugging for such caches by default, use
slub_debug=O
In case you forgot to enable debugging on the kernel command line: It is
possible to enable debugging manually when the kernel is up. Look at the
contents of:
......
Documentation/x86/zero-page.txt
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000/040 ALL screen_info Text mode or frame buffer information
(struct screen_info)
040/014 ALL apm_bios_info APM BIOS information (struct apm_bios_info)
058/008 ALL tboot_addr Physical address of tboot shared page
060/010 ALL ist_info Intel SpeedStep (IST) BIOS support information
(struct ist_info)
080/010 ALL hd0_info hd0 disk parameter, OBSOLETE!!
......
MAINTAINERS
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VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 31
EXTRAVERSION = -rc9
EXTRAVERSION =
NAME = Man-Eating Seals of Antiquity
# *DOCUMENTATION*
......@@ -325,7 +325,7 @@ CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
MODFLAGS = -DMODULE
CFLAGS_MODULE = $(MODFLAGS)
AFLAGS_MODULE = $(MODFLAGS)
LDFLAGS_MODULE =
LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
CFLAGS_KERNEL =
AFLAGS_KERNEL =
CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
......
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If unsure, say N.
config OPROFILE_EVENT_MULTIPLEX
bool "OProfile multiplexing support (EXPERIMENTAL)"
default n
depends on OPROFILE && X86
help
The number of hardware counters is limited. The multiplexing
feature enables OProfile to gather more events than counters
are provided by the hardware. This is realized by switching
between events at an user specified time interval.
If unsure, say N.
config HAVE_OPROFILE
bool
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#define unmap_page_from_agp(page)
#define flush_agp_cache() mb()
/* Convert a physical address to an address suitable for the GART. */
#define phys_to_gart(x) (x)
#define gart_to_phys(x) (x)
/* GATT allocation. Returns/accepts GATT kernel virtual address. */
#define alloc_gatt_pages(order) \
((char *)__get_free_pages(GFP_KERNEL, (order)))
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bus numbers. */
#define pcibios_assign_all_busses() 1
#define pcibios_scan_all_fns(a, b) 0
#define PCIBIOS_MIN_IO alpha_mv.min_io_address
#define PCIBIOS_MIN_MEM alpha_mv.min_mem_address
......
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#define SO_RCVTIMEO 0x1012
#define SO_SNDTIMEO 0x1013
#define SO_ACCEPTCONN 0x1014
#define SO_PROTOCOL 0x1028
#define SO_DOMAIN 0x1029
/* linux-specific, might as well be the same as on i386 */
#define SO_NO_CHECK 11
......
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#define TIF_UAC_SIGBUS 7
#define TIF_MEMDIE 8
#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */
#define TIF_NOTIFY_RESUME 10 /* callback before returning to user */
#define TIF_FREEZE 16 /* is freezing for suspend */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
......@@ -82,10 +83,12 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_FREEZE (1<<TIF_FREEZE)
/* Work to do on interrupt/exception return. */
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED)
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
_TIF_NOTIFY_RESUME)
/* Work to do on any return to userspace. */
#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \
......
arch/alpha/include/asm/tlbflush.h
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#define _ALPHA_TLBFLUSH_H
#include <linux/mm.h>
#include <linux/sched.h>
#include <asm/compiler.h>
#include <asm/pgalloc.h>
......
arch/alpha/kernel/signal.c
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#include <linux/binfmts.h>
#include <linux/bitops.h>
#include <linux/syscalls.h>
#include <linux/tracehook.h>
#include <asm/uaccess.h>
#include <asm/sigcontext.h>
......@@ -683,4 +684,11 @@ do_notify_resume(struct pt_regs *regs, struct switch_stack *sw,
{
if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
do_signal(regs, sw, r0, r19);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
tracehook_notify_resume(regs);
if (current->replacement_session_keyring)
key_replace_session_keyring();
}
}
arch/alpha/kernel/vmlinux.lds.S
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__bss_stop = .;
_end = .;
/* Sections to be discarded */
/DISCARD/ : {
EXIT_TEXT
EXIT_DATA
*(.exitcall.exit)
}
.mdebug 0 : {
*(.mdebug)
}
......@@ -150,4 +143,6 @@ SECTIONS
STABS_DEBUG
DWARF_DEBUG
DISCARDS
}
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# n, but then RMK will have to kill you ;).
config FRAME_POINTER
bool
depends on !THUMB2_KERNEL
default y if !ARM_UNWIND
help
If you say N here, the resulting kernel will be slightly smaller and
......
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/*
* linux/arch/arm/boot/compressed/head-sa1100.S
*
* Copyright (C) 1999 Nicolas Pitre <nico@cam.org>
* Copyright (C) 1999 Nicolas Pitre <nico@fluxnic.net>
*
* SA1100 specific tweaks. This is merged into head.S by the linker.
*
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arch/arm/mach-bcmring/include/mach/csp/hw_cfg.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/dma.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/entry-macro.S 0 → 100644
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arch/arm/mach-bcmring/include/mach/hardware.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/irqs.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/memory.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/system.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/timer.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/uncompress.h 0 → 100644
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arch/arm/mach-bcmring/include/mach/vmalloc.h 0 → 100644
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arch/arm/mach-bcmring/irq.c 0 → 100644
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arch/arm/mach-bcmring/mm.c 0 → 100644
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arch/arm/mach-bcmring/timer.c 0 → 100644
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arch/arm/mach-ep93xx/adssphere.c
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arch/arm/mach-ep93xx/clock.c
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arch/arm/mach-ep93xx/core.c
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arch/arm/mach-ep93xx/edb93xx.c
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arch/arm/mach-ep93xx/gesbc9312.c
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arch/arm/mach-ep93xx/gpio.c
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arch/arm/mach-ep93xx/micro9.c
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arch/arm/mach-ep93xx/ts72xx.c
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arch/arm/mach-ixp4xx/common.c
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arch/arm/mach-kirkwood/Kconfig
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arch/arm/mach-kirkwood/Makefile
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arch/arm/mach-kirkwood/common.c
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arch/arm/mach-mx1/clock.c
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arch/arm/mach-mx1/devices.c
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arch/arm/mach-mx1/generic.c
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arch/arm/mach-mx1/mx1ads.c
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arch/arm/mach-mx1/scb9328.c
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arch/arm/mach-mx2/Kconfig
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arch/arm/mach-mx2/Makefile
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arch/arm/mach-mx2/clock_imx21.c
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arch/arm/mach-mx2/clock_imx27.c
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arch/arm/mach-mx2/devices.c
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arch/arm/mach-mx2/devices.h
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arch/arm/mach-mx2/eukrea_mbimx27-baseboard.c 0 → 100644
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arch/arm/mach-mx2/generic.c
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arch/arm/mach-mx2/mx21ads.c
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arch/arm/mach-mx2/mx27ads.c
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arch/arm/mach-mx2/mx27lite.c
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arch/arm/mach-mx2/mx27pdk.c
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arch/arm/mach-mx2/pca100.c 0 → 100644
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arch/arm/mach-mx2/pcm038.c
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arch/arm/mach-mx25/Kconfig 0 → 100644
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arch/arm/mach-mx25/Makefile.boot 0 → 100644
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arch/arm/mach-mx25/clock.c 0 → 100644
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arch/arm/mach-mx25/devices.c 0 → 100644
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arch/arm/mach-mx25/devices.h 0 → 100644
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arch/arm/mach-mx25/mm.c 0 → 100644
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arch/arm/mach-mx25/mx25pdk.c 0 → 100644
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arch/arm/mach-mx3/armadillo5x0.c
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arch/arm/mach-mx3/clock-imx35.c
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arch/arm/mach-mx3/clock.c
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arch/arm/mach-mx3/devices.c
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arch/arm/mach-mx3/devices.h
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arch/arm/mach-mx3/mm.c
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arch/arm/mach-mx3/mx31ads.c
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arch/arm/mach-mx3/mx31lilly.c
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arch/arm/mach-mx3/mx31lite.c
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arch/arm/mach-mx3/mx31moboard.c
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arch/arm/mach-mx3/mx31pdk.c
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arch/arm/mach-mx3/mx35pdk.c
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arch/arm/mach-mx3/pcm037.c
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arch/arm/mach-mx3/pcm043.c
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arch/arm/mach-mx3/qong.c
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arch/arm/mach-mxc91231/Kconfig 0 → 100644
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arch/arm/mach-mxc91231/Makefile 0 → 100644
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arch/arm/mach-mxc91231/Makefile.boot 0 → 100644
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arch/arm/mach-mxc91231/clock.c 0 → 100644
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arch/arm/mach-mxc91231/crm_regs.h 0 → 100644
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arch/arm/mach-mxc91231/devices.c 0 → 100644
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arch/arm/mach-mxc91231/devices.h 0 → 100644
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arch/arm/mach-mxc91231/iomux.c 0 → 100644
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arch/arm/mach-mxc91231/magx-zn5.c 0 → 100644
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arch/arm/mach-mxc91231/mm.c 0 → 100644
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arch/arm/mach-mxc91231/system.c 0 → 100644
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arch/arm/mach-nomadik/Kconfig 0 → 100644
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arch/arm/mach-nomadik/Makefile 0 → 100644
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arch/arm/mach-nomadik/Makefile.boot 0 → 100644
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arch/arm/mach-nomadik/board-nhk8815.c 0 → 100644
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arch/arm/mach-nomadik/clock.c 0 → 100644
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arch/arm/mach-nomadik/clock.h 0 → 100644
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arch/arm/mach-nomadik/cpu-8815.c 0 → 100644
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arch/arm/mach-nomadik/gpio.c 0 → 100644
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arch/arm/mach-nomadik/i2c-8815nhk.c 0 → 100644
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arch/arm/mach-nomadik/include/mach/clkdev.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/debug-macro.S 0 → 100644
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arch/arm/mach-nomadik/include/mach/entry-macro.S 0 → 100644
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arch/arm/mach-nomadik/include/mach/gpio.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/hardware.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/io.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/irqs.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/memory.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/mtu.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/setup.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/system.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/timex.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/uncompress.h 0 → 100644
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arch/arm/mach-nomadik/include/mach/vmalloc.h 0 → 100644
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arch/arm/mach-nomadik/timer.c 0 → 100644
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arch/arm/mach-omap2/board-4430sdp.c
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arch/arm/mach-omap2/mcbsp.c
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arch/arm/mach-omap2/serial.c
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arch/arm/mach-orion5x/Kconfig
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arch/arm/mach-orion5x/Makefile
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arch/arm/mach-orion5x/addr-map.c
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arch/arm/mach-orion5x/d2net-setup.c 0 → 100644
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arch/arm/mach-orion5x/net2big-setup.c 0 → 100644
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arch/arm/mach-pxa/sharpsl_pm.c
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arch/arm/mach-realview/Kconfig
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arch/arm/mach-realview/core.c
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arch/arm/mach-realview/include/mach/gpio.h 0 → 100644
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arch/arm/mach-realview/platsmp.c
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arch/arm/mach-s3c2410/Kconfig
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arch/arm/mach-s3c2410/Makefile
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arch/arm/mach-s3c2410/cpu-freq.c 0 → 100644
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arch/arm/mach-s3c2410/dma.c
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arch/arm/mach-s3c2410/s3c2410.c
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arch/arm/mach-s3c2412/Kconfig
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arch/arm/mach-s3c2440/Kconfig
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arch/arm/mach-s3c2440/mach-osiris.c
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arch/arm/mach-s3c6400/s3c6400.c
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arch/arm/mach-s3c6410/cpu.c
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arch/arm/mach-sa1100/pm.c
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arch/arm/mach-sa1100/time.c
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arch/arm/mach-u300/mmc.c
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arch/arm/mach-versatile/core.c
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arch/arm/mach-w90x900/Kconfig
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arch/arm/mach-w90x900/gpio.c
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arch/arm/mach-w90x900/irq.c
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arch/arm/mach-w90x900/time.c
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arch/arm/mm/Kconfig
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arch/arm/mm/alignment.c
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arch/arm/mm/cache-v7.S
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arch/arm/mm/dma-mapping.c
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arch/arm/mm/fault.c
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arch/arm/mm/flush.c
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arch/arm/mm/highmem.c
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arch/arm/mm/init.c
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arch/arm/mm/nommu.c
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arch/arm/mm/proc-macros.S
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arch/arm/mm/proc-v7.S
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arch/arm/mm/proc-xscale.S
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arch/arm/plat-iop/setup.c
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arch/arm/plat-mxc/Kconfig
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arch/arm/plat-mxc/clock.c
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arch/arm/plat-mxc/gpio.c
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arch/arm/plat-mxc/iomux-v3.c
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arch/arm/plat-mxc/irq.c
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arch/arm/plat-mxc/pwm.c
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arch/arm/plat-mxc/system.c
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arch/arm/plat-mxc/time.c
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arch/arm/plat-omap/debug-leds.c
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arch/arm/plat-omap/dma.c
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arch/arm/plat-omap/gpio.c
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arch/arm/plat-omap/mcbsp.c
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arch/arm/plat-s3c/Kconfig
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arch/arm/plat-s3c/Makefile
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arch/arm/plat-s3c/include/plat/audio-simtec.h 0 → 100644
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arch/arm/plat-s3c/include/plat/hwmon.h 0 → 100644
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arch/arm/plat-s3c/pwm.c 0 → 100644
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arch/arm/plat-s3c24xx/Kconfig
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arch/arm/plat-s3c24xx/Makefile
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arch/arm/plat-s3c24xx/adc.c
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arch/arm/plat-s3c24xx/cpu-freq.c 0 → 100644
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arch/arm/plat-s3c24xx/cpu.c
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arch/arm/plat-s3c24xx/devs.c
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arch/arm/plat-s3c24xx/include/plat/cpu-freq-core.h 0 → 100644
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arch/arm/plat-s3c24xx/include/plat/fiq.h 0 → 100644
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arch/arm/plat-s3c24xx/irq.c
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arch/arm/plat-s3c24xx/pwm.c 已删除 100644 → 0
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arch/arm/plat-s3c24xx/s3c2410-cpufreq-utils.c 0 → 100644
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arch/arm/plat-s3c24xx/s3c2410-iotiming.c 0 → 100644
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arch/arm/plat-s3c24xx/s3c2412-iotiming.c 0 → 100644
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arch/arm/plat-s3c24xx/s3c2440-cpufreq.c 0 → 100644
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arch/arm/plat-s3c24xx/s3c2440-pll-12000000.c 0 → 100644
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arch/arm/plat-s3c24xx/s3c2440-pll-16934400.c 0 → 100644
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arch/arm/plat-s3c24xx/spi-bus1-gpd8_9_10.c 0 → 100644
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arch/arm/plat-s3c64xx/Kconfig
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arch/arm/plat-s3c64xx/Makefile
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arch/arm/plat-s5pc1xx/Kconfig 0 → 100644
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arch/arm/plat-s5pc1xx/Makefile 0 → 100644
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arch/arm/plat-s5pc1xx/cpu.c 0 → 100644
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arch/arm/plat-s5pc1xx/dev-uart.c 0 → 100644
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arch/arm/plat-s5pc1xx/include/plat/irqs.h 0 → 100644
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arch/arm/plat-s5pc1xx/include/plat/pll.h 0 → 100644
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arch/arm/plat-s5pc1xx/include/plat/regs-clock.h 0 → 100644
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arch/arm/plat-s5pc1xx/include/plat/s5pc100.h 0 → 100644
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arch/arm/plat-s5pc1xx/irq.c 0 → 100644
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arch/arm/plat-s5pc1xx/s5pc100-clock.c 0 → 100644
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arch/arm/plat-s5pc1xx/s5pc100-init.c 0 → 100644
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arch/arm/plat-s5pc1xx/setup-i2c0.c 0 → 100644
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arch/arm/plat-s5pc1xx/setup-i2c1.c 0 → 100644
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arch/arm/tools/mach-types
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arch/arm/vfp/entry.S
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arch/arm/vfp/vfphw.S
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arch/avr32/include/asm/socket.h
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arch/avr32/kernel/entry-avr32b.S
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arch/avr32/kernel/signal.c
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arch/avr32/kernel/vmlinux.lds.S
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arch/blackfin/kernel/vmlinux.lds.S
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arch/blackfin/mm/sram-alloc.c
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arch/cris/include/asm/mmu_context.h
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arch/cris/include/asm/socket.h
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arch/cris/kernel/ptrace.c
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arch/cris/kernel/vmlinux.lds.S
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arch/cris/mm/fault.c
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arch/frv/include/asm/socket.h
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arch/frv/kernel/signal.c
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arch/frv/kernel/vmlinux.lds.S
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arch/frv/mb93090-mb00/pci-frv.c
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arch/h8300/include/asm/pci.h
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arch/h8300/include/asm/socket.h
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arch/h8300/kernel/signal.c
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arch/h8300/kernel/vmlinux.lds.S
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arch/ia64/Kconfig
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arch/ia64/hp/sim/simeth.c
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arch/ia64/include/asm/agp.h
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arch/ia64/include/asm/device.h
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arch/ia64/include/asm/dma-mapping.h
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arch/ia64/include/asm/kvm_host.h
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arch/ia64/include/asm/kvm_para.h
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arch/ia64/include/asm/pci.h
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arch/ia64/include/asm/socket.h
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arch/ia64/kernel/head.S
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arch/ia64/kernel/process.c
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arch/ia64/kernel/setup.c
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arch/ia64/kernel/smp.c
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arch/ia64/kernel/vmlinux.lds.S
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arch/ia64/kvm/Kconfig
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arch/ia64/kvm/kvm-ia64.c
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arch/ia64/kvm/vcpu.c
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