21 Mar, 2009
4 commits
-
This interface allows the user to force a rescan of the device's
parent bus and all subordinate buses, and rediscover devices removed
earlier from this part of the device tree.Cc: Trent Piepho
Signed-off-by: Alex Chiang
Signed-off-by: Jesse Barnes -
This patch adds an attribute named "remove" to a PCI device's sysfs
directory. Writing a non-zero value to this attribute will remove the PCI
device and any children of it.Trent Piepho wrote the original implementation and documentation.
Thanks to Vegard Nossum for testing under kmemcheck and finding locking
issues with the sysfs interface.Cc: Trent Piepho
Tested-by: Vegard Nossum
Signed-off-by: Alex Chiang
Signed-off-by: Jesse Barnes -
This interface allows the user to force a rescan of all PCI buses
in system, and rediscover devices that have been removed earlier.pci_bus_attrs implementation from Trent Piepho.
Thanks to Vegard Nossum for discovering locking issues with the
sysfs interface.Cc: Trent Piepho
Signed-off-by: Alex Chiang
Signed-off-by: Jesse Barnes -
X really would like to know which VGA device was considered the boot
device by the system. The x86 PCI fixups have support for discovering
this but we provide no way to expose it to userspace.This adds a sysfs file per VGA class device which has the value 0 for
non the boot device or unknown, and 1 if the VGA device is the boot
device.Acked-by: Greg Kroah-Hartman
Signed-off-by: Dave Airlie
Signed-off-by: Jesse Barnes
20 Mar, 2009
1 commit
-
This closes http://bugzilla.kernel.org/show_bug.cgi?id=10893
which is a showstopper for X development on alpha.The generic HAVE_PCI_MMAP code (drivers/pci-sysfs.c) is not
very useful since we have to deal with three different types
of MMIO address spaces: sparse and dense mappings for old
ev4/ev5 machines and "normal" 1:1 MMIO space (bwx) for ev56 and
later.
Also "write combine" mappings are meaningless on alpha - roughly
speaking, alpha does write combining, IO reordering and other
optimizations by default, unless user splits IO accesses
with memory barriers.I think the cleanest way to deal with resource files on alpha
is to convert the default no-op pci_create_resource_files() and
pci_remove_resource_files() for !HAVE_PCI_MMAP case into __weak
functions and override them with alpha specific ones.Another alpha hook is needed for "legacy_" resource files
to handle sparse addressing (pci_adjust_legacy_attr).With the "standard" resourceN files on ev56/ev6 libpciaccess
works "out of the box". Handling of resourceN_sparse/resourceN_dense
files on older machines obviously requires some userland work.Sparse/dense stuff has been tested on sx164 (pca56/pyxis, normally
uses bwx IO) with the kernel hacked into "cia compatible" mode.Signed-off-by: Ivan Kokshaysky
Signed-off-by: Jesse Barnes
05 Feb, 2009
1 commit
-
This patch makes the ROM reading code return an error to user space if
the size of the ROM read is equal to 0.The patch also emits a warnings if the contents of the ROM are invalid,
and documents the effects of the "enable" file on ROM reading.Signed-off-by: Timothy S. Nelson
Acked-by: Alex Villacis-Lasso
Signed-off-by: Jesse Barnes
10 Jan, 2009
1 commit
-
* 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
[IA64] fix typo in cpumask_of_pcibus()
x86: fix x86_32 builds for summit and es7000 arch's
cpumask: use work_on_cpu in acpi-cpufreq.c for read_measured_perf_ctrs
cpumask: use work_on_cpu in acpi-cpufreq.c for drv_read and drv_write
cpumask: use cpumask_var_t in acpi-cpufreq.c
cpumask: use work_on_cpu in acpi/cstate.c
cpumask: convert struct cpufreq_policy to cpumask_var_t
cpumask: replace CPUMASK_ALLOC etc with cpumask_var_t
x86: cleanup remaining cpumask_t ops in smpboot code
cpumask: update pci_bus_show_cpuaffinity to use new cpumask API
cpumask: update local_cpus_show to use new cpumask API
ia64: cpumask fix for is_affinity_mask_valid()
08 Jan, 2009
5 commits
-
Change PCI VPD API which was only used by sysfs to something usable
in drivers.
* move iteration over multiple words to the low level
* use conventional types for arguments
* add exportable wrapperSigned-off-by: Stephen Hemminger
Signed-off-by: Jesse Barnes -
This patch moves all definitions of the PCI resource names to an 'enum',
and also replaces some hard-coded resource variables with symbol
names. This change eases introduction of device specific resources.Reviewed-by: Bjorn Helgaas
Signed-off-by: Yu Zhao
Signed-off-by: Jesse Barnes -
PCI devices have three settable boolean attributes, enable,
broken_parity_status, and msi_bus.The store functions for these would silently interpret "0x01" as false,
"1llogical" as true, and "true" would be (silently!) ignored and do
nothing.This is inconsistent with typical sysfs handling of settable attributes,
and just plain doesn't make much sense.So, use strict_strtoul(), which was created for this purpose. The store
functions will treat a value of 0 as false, non-zero as true, and return
-EINVAL for a parse failure.Additionally, is_enabled_store() and msi_bus_store() return -EPERM if
CAP_SYS_ADMIN is lacking, rather than silently doing nothing. This is more
typical behavior for sysfs attributes that need a capability.And msi_bus_store() will only print the "forced subordinate bus ..."
warning if the MSI flag was actually forced to a different value.Signed-off-by: Trent Piepho
Signed-off-by: Jesse Barnes -
Device drivers that use pci_request_regions() (and similar APIs) have a
reasonable expectation that they are the only ones accessing their device.
As part of the e1000e hunt, we were afraid that some userland (X or some
bootsplash stuff) was mapping the MMIO region that the driver thought it
had exclusively via /dev/mem or via various sysfs resource mappings.This patch adds the option for device drivers to cause their reserved
regions to the "banned from /dev/mem use" list, so now both kernel memory
and device-exclusive MMIO regions are banned.
NOTE: This is only active when CONFIG_STRICT_DEVMEM is set.In addition to the config option, a kernel parameter iomem=relaxed is
provided for the cases where developers want to diagnose, in the field,
drivers issues from userspace.Reviewed-by: Matthew Wilcox
Signed-off-by: Arjan van de Ven
Signed-off-by: Jesse Barnes -
/proc/bus/pci allows you to mmap resource ranges too, so we should probably be
checking to make sure the mapping is somewhat valid. Uses the same code as the recent sysfs mmap range checking patch from Linus.Acked-by: David Miller
Signed-off-by: Jesse Barnes
04 Jan, 2009
1 commit
-
Impact: use new cpumask API to reduce stack usage
Replace the local cpumask_t variable with a pointer to the
const cpumask that needs to be printed.Signed-off-by: Mike Travis
Signed-off-by: Ingo Molnar
13 Dec, 2008
1 commit
-
…t_scnprintf to take pointers.
Impact: change calling convention of existing cpumask APIs
Most cpumask functions started with cpus_: these have been replaced by
cpumask_ ones which take struct cpumask pointers as expected.These four functions don't have good replacement names; fortunately
they're rarely used, so we just change them over.Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: paulus@samba.org
Cc: mingo@redhat.com
Cc: tony.luck@intel.com
Cc: ralf@linux-mips.org
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: cl@linux-foundation.org
Cc: srostedt@redhat.com
04 Nov, 2008
1 commit
-
pci_mmap_fits() returns the wrong answer if the sysfs resource file size
is not a multiple of the page size. vm_end and vm_start are already
page-aligned, so size - start < nr, causing mmap() to return EINVAL.Signed-off-by: Ed Swierk
Signed-off-by: Andrew Morton
Signed-off-by: Jesse Barnes
21 Oct, 2008
3 commits
-
This adds the ability to mmap legacy IO space to the legacy_io files
in sysfs on platforms that support it. This will allow to clean up
X to use this instead of /dev/mem for legacy IO accesses such as
those performed by Int10.While at it I moved pci_create/remove_legacy_files() to pci-sysfs.c
where I think they belong, thus making more things statis in there
and cleaned up some spurrious prototypes in the ia64 pci.h fileSigned-off-by: Benjamin Herrenschmidt
Signed-off-by: Jesse Barnes -
This patch centralizes functions used to add and remove sysfs entries
for various capabilities. With this cleanup, the code is more readable
and easier for adding new capability related functions.Signed-off-by: Yu Zhao
Signed-off-by: Jesse Barnes -
This is a cleanup that changes all PCI configuration space size
representations to the macros (PCI_CFG_SPACE_SIZE and
PCI_CFG_SPACE_EXP_SIZE). And the macros are also moved from
drivers/pci/probe.c to drivers/pci/pci.h.Signed-off-by: Yu Zhao
Signed-off-by: Jesse Barnes
03 Oct, 2008
1 commit
-
This is loosely based on a patch by Jesse Barnes to check the user-space
PCI mappings though the sysfs interfaces. Quoting Jesse's original
explanation:It's fairly common for applications to map PCI resources through sysfs.
However, with the current implementation, it's possible for an application
to map far more than the range corresponding to the resourceN file it
opened. This patch plugs that hole by checking the range at mmap time,
similar to what is done on platforms like sparc64 in their lower level
PCI remapping routines.It was initially put together to help debug the e1000e NVRAM corruption
problem, since we initially thought an X driver might be walking past the
end of one of its mappings and clobbering the NVRAM. It now looks like
that's not the case, but doing the check is still important for obvious
reasons.and this version of the patch differs in that it uses a helper function
to clarify the code, and does all the checks in pages (instead of bytes)
in order to avoid overflows when doing "<< PAGE_SHIFT" etc.Acked-by: Jesse Barnes
Signed-off-by: Linus Torvalds
03 Jul, 2008
1 commit
-
For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
VPD end tag will hang the device. This problem was initially
observed when a vpd entry was created in sysfs
('/sys/bus/pci/devices//vpd'). A read to this sysfs entry
will dump 32k of data. Reading a full 32k will cause an access
beyond the VPD end tag causing the device to hang. Once the device
is hung, the bnx2 driver will not be able to reset the device.
We believe that it is legal to read beyond the end tag and
therefore the solution is to limit the read/write length.A majority of this patch is from Matthew Wilcox who gave code for
reworking the PCI vpd size information. A PCI quirk added for the
Broadcom NIC's to limit the read/write's.Signed-off-by: Benjamin Li
Signed-off-by: Matthew Wilcox
Signed-off-by: Jesse Barnes
02 Jul, 2008
1 commit
-
Some PCI devices will lock up if we attempt to read from VPD addresses
beyond some device-dependent limit. Until we can identify these
devices and adjust the file size accordingly, only let root read VPD
through sysfs to prevent a DoS by normal users.Signed-off-by: Ben Hutchings
Signed-off-by: Jesse Barnes
13 Jun, 2008
1 commit
-
Now that we can actually do write combining properly, there's no need to have
the FIXME.Signed-off-by: Jesse Barnes
12 Jun, 2008
1 commit
-
For the ranges with IORESOURCE_PREFETCH, export a new resource_wc interface in
pci /sysfs along with resource (which is uncached).Signed-off-by: Venkatesh Pallipadi
Signed-off-by: Suresh Siddha
Acked-by: Jesse Barnes
Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner
22 Apr, 2008
1 commit
-
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/pci-2.6: (42 commits)
PCI: Change PCI subsystem MAINTAINER
PCI: pci-iommu-iotlb-flushing-speedup
PCI: pci_setup_bridge() mustn't be __devinit
PCI: pci_bus_size_cardbus() mustn't be __devinit
PCI: pci_scan_device() mustn't be __devinit
PCI: pci_alloc_child_bus() mustn't be __devinit
PCI: replace remaining __FUNCTION__ occurrences
PCI: Hotplug: fakephp: Return success, not ENODEV, when bus rescan is triggered
PCI: Hotplug: Fix leaks in IBM Hot Plug Controller Driver - ibmphp_init_devno()
PCI: clean up resource alignment management
PCI: aerdrv_acpi.c: remove unneeded NULL check
PCI: Update VIA CX700 quirk
PCI: Expose PCI VPD through sysfs
PCI: iommu: iotlb flushing
PCI: simplify quirk debug output
PCI: iova RB tree setup tweak
PCI: parisc: use generic pci_enable_resources()
PCI: ppc: use generic pci_enable_resources()
PCI: powerpc: use generic pci_enable_resources()
PCI: ia64: use generic pci_enable_resources()
...
21 Apr, 2008
2 commits
-
Vital Product Data (VPD) may be exposed by PCI devices in several
ways. It is generally unsafe to read this information through the
existing interfaces to user-land because of stateful interfaces.This adds:
- abstract operations for VPD access (struct pci_vpd_ops)
- VPD state information in struct pci_dev (struct pci_vpd)
- an implementation of the VPD access method specified in PCI 2.2
(in access.c)
- a 'vpd' binary file in sysfs directories for PCI devices with VPD
operations definedIt adds a probe for PCI 2.2 VPD in pci_scan_device() and release of
VPD state in pci_release_dev().Signed-off-by: Ben Hutchings
Signed-off-by: Greg Kroah-Hartman -
PCI Express ASPM defines a protocol for PCI Express components in the D0
state to reduce Link power by placing their Links into a low power state
and instructing the other end of the Link to do likewise. This
capability allows hardware-autonomous, dynamic Link power reduction
beyond what is achievable by software-only controlled power management.
However, The device should be configured by software appropriately.
Enabling ASPM will save power, but will introduce device latency.This patch adds ASPM support in Linux. It introduces a global policy for
ASPM, a sysfs file /sys/module/pcie_aspm/parameters/policy can control
it. The interface can be used as a boot option too. Currently we have
below setting:
-default, BIOS default setting
-powersave, highest power saving mode, enable all available ASPM
state and clock power management
-performance, highest performance, disable ASPM and clock power
management
By default, the 'default' policy is used currently.In my test, power difference between powersave mode and performance mode
is about 1.3w in a system with 3 PCIE links.Note: some devices might not work well with aspm, either because chipset
issue or device issue. The patch provide API (pci_disable_link_state),
driver can disable ASPM for specific device.Signed-off-by: Shaohua Li
Signed-off-by: Greg Kroah-Hartman
20 Apr, 2008
1 commit
-
* Cleaned up references to cpumask_scnprintf() and added new
cpulist_scnprintf() interfaces where appropriate.* Fix some small bugs (or code efficiency improvments) for various uses
of cpumask_scnprintf.* Clean up some checkpatch errors.
Signed-off-by: Mike Travis
Signed-off-by: Ingo Molnar
03 Feb, 2008
1 commit
-
This reverts commit 6c723d5bd89f03fc3ef627d50f89ade054d2ee3b.
It caused build errors on non-x86 platforms, config file confusion, and
even some boot errors on some x86-64 boxes. All around, not quite ready
for prime-time :(Cc: Shaohua Li
Signed-off-by: Greg Kroah-Hartman
02 Feb, 2008
2 commits
-
This moves the pci_bus class device to be a real struct device and at
the same time, place it in the device tree in the correct location.Note, the old "bridge" symlink is now gone, but this was a non-standard
link and no userspace program used it. If you need to determine the
device that the bus is on, follow the standard device symlink, or walk
up the device tree.Signed-off-by: Greg Kroah-Hartman
-
PCI Express ASPM defines a protocol for PCI Express components in the D0
state to reduce Link power by placing their Links into a low power state
and instructing the other end of the Link to do likewise. This
capability allows hardware-autonomous, dynamic Link power reduction
beyond what is achievable by software-only controlled power management.
However, The device should be configured by software appropriately.
Enabling ASPM will save power, but will introduce device latency.This patch adds ASPM support in Linux. It introduces a global policy for
ASPM, a sysfs file /sys/module/pcie_aspm/parameters/policy can control
it. The interface can be used as a boot option too. Currently we have
below setting:
-default, BIOS default setting
-powersave, highest power saving mode, enable all available ASPM
state
and clock power management
-performance, highest performance, disable ASPM and clock power
management
By default, the 'default' policy is used currently.In my test, power difference between powersave mode and performance mode
is about 1.3w in a system with 3 PCIE links.Signed-off-by: Shaohua Li
Signed-off-by: Greg Kroah-Hartman
29 Nov, 2007
1 commit
-
There should be a pci_dev_put when breaking out of a loop that iterates
over calls to pci_get_device and similar functions.This was fixed using the following semantic patch.
//
@@
identifier d;
type T;
expression e;
iterator for_each_pci_dev;
@@T *d;
...
for_each_pci_dev(d)
{... when != pci_dev_put(d)
when != e = d
(
return d;
|
+ pci_dev_put(d);
? return ...;
)
...}
//Signed-off-by: Julia Lawall
Signed-off-by: Greg Kroah-Hartman
17 Jul, 2007
1 commit
-
I forgot to remove capability.h from mm.h while removing sched.h! This
patch remedies that, because the only inline function which was using
CAP_something was made out of line.Cross-compile tested without regressions on:
all powerpc defconfigs
all mips defconfigs
all m68k defconfigs
all arm defconfigs
all ia64 defconfigsalpha alpha-allnoconfig alpha-defconfig alpha-up
arm
i386 i386-allnoconfig i386-defconfig i386-up
ia64 ia64-allnoconfig ia64-defconfig ia64-up
m68k
mips
parisc parisc-allnoconfig parisc-defconfig parisc-up
powerpc powerpc-up
s390 s390-allnoconfig s390-defconfig s390-up
sparc sparc-allnoconfig sparc-defconfig sparc-up
sparc64 sparc64-allnoconfig sparc64-defconfig sparc64-up
um-x86_64
x86_64 x86_64-allnoconfig x86_64-defconfig x86_64-upas well as my two usual configs.
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Jul, 2007
1 commit
-
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (34 commits)
PCI: Only build PCI syscalls on architectures that want them
PCI: limit pci_get_bus_and_slot to domain 0
PCI: hotplug: acpiphp: avoid acpiphp "cannot get bridge info" PCI hotplug failure
PCI: hotplug: acpiphp: remove hot plug parameter write to PCI host bridge
PCI: hotplug: acpiphp: fix slot poweroff problem on systems without _PS3
PCI: hotplug: pciehp: wait for 1 second after power off slot
PCI: pci_set_power_state(): check for PM capabilities earlier
PCI: cpci_hotplug: Convert to use the kthread API
PCI: add pci_try_set_mwi
PCI: pcie: remove SPIN_LOCK_UNLOCKED
PCI: ROUND_UP macro cleanup in drivers/pci
PCI: remove pci_dac_dma_... APIs
PCI: pci-x-pci-express-read-control-interfaces cleanups
PCI: Fix typo in include/linux/pci.h
PCI: pci_ids, remove double or more empty lines
PCI: pci_ids, add atheros and 3com_2 vendors
PCI: pci_ids, reorder some entries
PCI: i386: traps, change VENDOR to DEVICE
PCI: ATM: lanai, change VENDOR to DEVICE
PCI: Change all drivers to use pci_device->revision
...
12 Jul, 2007
4 commits
-
Well, first of all, I don't want to change so many files either.
What I do:
Adding a new parameter "struct bin_attribute *" in the
.read/.write methods for the sysfs binary attributes.In fact, only the four lines change in fs/sysfs/bin.c and
include/linux/sysfs.h do the real work.
But I have to update all the files that use binary attributes
to make them compatible with the new .read and .write methods.
I'm not sure if I missed any. :(Why I do this:
For a sysfs attribute, we can get a pointer pointing to the
struct attribute in the .show/.store method,
while we can't do this for the binary attributes.
I don't know why this is different, but this does make it not
so handy to use the binary attributes as the regular ones.
So I think this patch is reasonable. :)Who benefits from it:
The patch that exposes ACPI tables in sysfs
requires such an improvement.
All the table binary attributes share the same .read method.
Parameter "struct bin_attribute *" is used to get
the table signature and instance number which are used to
distinguish different ACPI table binary attributes.Without this parameter, we need to offer different .read methods
for different ACPI table binary attributes.
This is impossible as there are various ACPI tables on different
platforms, and we don't know what they are until they are loaded.Signed-off-by: Zhang Rui
Signed-off-by: Greg Kroah-Hartman -
sysfs is now completely out of driver/module lifetime game. After
deletion, a sysfs node doesn't access anything outside sysfs proper,
so there's no reason to hold onto the attribute owners. Note that
often the wrong modules were accounted for as owners leading to
accessing removed modules.This patch kills now unnecessary attribute->owner. Note that with
this change, userland holding a sysfs node does not prevent the
backing module from being unloaded.For more info regarding lifetime rule cleanup, please read the
following message.http://article.gmane.org/gmane.linux.kernel/510293
(tweaked by Greg to not delete the field just yet, to make it easier to
merge things properly.)Signed-off-by: Tejun Heo
Cc: Cornelia Huck
Cc: Andrew Morton
Signed-off-by: Greg Kroah-Hartman -
Currently pcibios_add_platform_entries() returns void, but could fail,
so instead have it return an int and propagate errors up to
pci_create_sysfs_dev_files().Fixes:
arch/powerpc/kernel/pci_64.c: In function 'pcibios_add_platform_entries':
arch/powerpc/kernel/pci_64.c:878: warning: ignoring return value of
'device_create_file', declared with attribute warn_unused_result
arch/powerpc/kernel/pci_32.c: In function 'pcibios_add_platform_entries':
arch/powerpc/kernel/pci_32.c:1043: warning: ignoring return value of
'device_create_file', declared with attribute warn_unused_resultSigned-off-by: Michael Ellerman
Signed-off-by: Greg Kroah-Hartman -
I'm not sure if this is going to fly, weak symbols work on the compilers I'm
using, but whether they work for all of the affected architectures I can't say.
I've cc'ed as many arch maintainers/lists as I could find.But assuming they do, we can use a weak empty definition of
pcibios_add_platform_entries() to avoid having an empty definition on every
arch.Signed-off-by: Michael Ellerman
Signed-off-by: Greg Kroah-Hartman
03 May, 2007
2 commits
-
pci_create_sysfs_dev_files() should call pci_remove_resource_files() in
its error path, to match the call it makes to pci_create_resource_files().Signed-off-by: Michael Ellerman
Signed-off-by: Greg Kroah-Hartman -
At one time, if a BIOS ROM shadow was detected for the boot video
device (stored at offset 0xc0000), we'd set a special resource flag,
IORESOURCE_ROM_SHADOW, so that the sysfs ROM file code could handle
it properly. That broke along the way somewhere though, so current
kernels will be missing 'rom' files in sysfs if the video device
doesn't have an explicit ROM BAR.This patch fixes the regression by moving the video fixup quirk to a
little later in the boot cycle (to avoid having its work undone by
PCI resource allocation) and checking in the PCI sysfs code whether
a rom file should be created due to a shadow resource, which is also
moved to a little later in the boot cycle so it will occur after the
video fixup. Tested and works on my i386 test box.Signed-off-by: Jesse Barnes
Signed-off-by: Greg Kroah-Hartman
17 Feb, 2007
1 commit
-
Export the numa-node attribute of PCI devices in sysfs so that
user applications may choose where to be placed accordingly.Signed-off-by: Brice Goglin
Signed-off-by: Greg Kroah-Hartman
