Commit Graph

1658 Commits

Author SHA1 Message Date
Alex Chiang
867556fe74 PCI Hotplug: cpqphp: refactor cpqhp_probe
Apply DeMorgan's theorem:

	if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL))

turns into

	if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL))

Now we can bail out early from the function if the controller is not
supported.

This allows us to un-indent the remainder of the function quite a bit and
make it much more readable.

Fix up some extra braces, and un-indent the 'case' labels in the switch
statement as per CodingStyle.

No functional change.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:11 -07:00
Alex Chiang
04225fe7e6 PCI Hotplug: cpqphp: eliminate stray braces
Clean up style and eliminate superfluous braces and parens.

No functional change.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:10 -07:00
Alex Chiang
b4d897a48d PCI Hotplug: cpqphp: remove useless prototypes in cpqphp_core.c
Impact: refactor

Refactor code to follow convention more closely and eliminate the need
for some useless prototypes.

No functional change.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:09 -07:00
Alex Chiang
86a58023e4 PCI Hotplug: cpqphp: obey 80 column convention in cpqphp.h
Clean up cpqphp.h to follow 80 column convention.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:09 -07:00
Alex Chiang
427438c61b PCI Hotplug: cpqphp: fix comment style
Fix up comments from C++ to C-style, wrapping if necessary, etc.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:08 -07:00
Alex Chiang
861fefbf55 PCI Hotplug: cpqphp: stray whitespace cleanups
Clean up all stray whitespace issues, such as trailing whitespace,
spaces before tabs, etc. and whatever else vim's c_space_errors
highlights in red.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:07 -07:00
Yinghai Lu
d09ee9687e PCI: improve resource allocation under transparent bridges
We could run out of space under under 4g, but devices under transparent
bridges can use 64bit resources, so keep trying on the parent bus until
we hit a non-transparent bridge.

Impact: better support for assigning unassigned resources

Reviewed-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:07 -07:00
Yinghai Lu
1f82de10d6 PCI/x86: don't assume prefetchable ranges are 64bit
We should not assign 64bit ranges to PCI devices that only take 32bit
prefetchable addresses.

Try to set IORESOURCE_MEM_64 in 64bit resource of pci_device/pci_bridge
and make the bus resource only have that bit set when all devices under
it support 64bit prefetchable memory.  Use that flag to allocate
resources from that range.

Reported-by: Yannick <yannick.roehlly@free.fr>
Reviewed-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:06 -07:00
Hidetoshi Seto
67b5db6502 PCI MSI: Define PCI_MSI_MASK_32/64
Impact: cleanup, improve readability

Define PCI_MSI_MASK_32/64 for 32/64bit devices, instead of using
implicit offset (-4), "PCI_MSI_MASK_BIT - 4" and "PCI_MSI_MASK_BIT".

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:06 -07:00
akpm@linux-foundation.org
64f039d3d7 PCI: ibmphp_core.c: fix warning due to missing module_exit()
drivers/pci/hotplug/ibmphp_core.c:1414: warning: `ibmphp_exit' defined but not used

Signed-off-by: Zhenwen Xu <helight.xu@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:05 -07:00
Greg Kroah-Hartman
ad4efa359d PCIE: remove driver_data direct access of struct device
In the near future, the driver core is going to not allow direct access
to the driver_data pointer in struct device.  Instead, the functions
dev_get_drvdata() and dev_set_drvdata() should be used.  These functions
have been around since the beginning, so are backwards compatible with
all older kernel versions.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:04 -07:00
Hidetoshi Seto
04846b5b81 PCI MSI: Remove unused/obsolete macros and definitions
Impact: cleanup, spec compliance

This patch does:

 - Remove unused msi/msix_enable/disable macros.
   User should use msi/msix_set_enable() functions instead.

 - Remove unused msix_mask/unmask/pending macros.
   These macros are useless because they are not based on any of
   the PCI Local Bus Specifications properly.
   It seems that they were written based on a draft of PCI spec,
   and that the draft was the MSI-X ECN that underwent membership
   review in September 2002.
   (* In the draft, the size of a entry in MSI-X table was 64bit,
      containing 32bit message data and DWORD aligned lower address
      plus a pending bit and a mask bit.(30+1+1bit)  The higher
      address was placed in MSI-X capability structure and shared
      by all entries.)

 - Remove PCI_MSIX_FLAGS_BITMASK.
   This definition also come from the draft ECN.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-11 12:04:03 -07:00
Yu Zhao
f79b1b146b PCI: use fixed-up device class when configuring device
The device class may be changed after the fixup, so re-read the class
value from pci_dev when configuring the device.  Otherwise some devices
such as JMicron SATA controller won't work.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Tested-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-04 11:29:43 +01:00
Alex Chiang
9d911d7903 PCI Hotplug: acpiphp: don't store a pci_dev in acpiphp_func
An oops can occur if a user attempts to use both PCI logical
hotplug and the ACPI physical hotplug driver (acpiphp) in this
sequence, where $slot/address == $device.

In other words, if acpiphp has claimed a PCI device, and that
device is logically removed, then acpiphp may oops when it
attempts to access it again.

	# echo 1 > /sys/bus/pci/devices/$device/remove
	# echo 0 > /sys/bus/pci/slots/$slot/power

Unable to handle kernel NULL pointer dereference (address 0000000000000000)
Call Trace:
 [<a000000100016390>] show_stack+0x50/0xa0
 [<a000000100016c60>] show_regs+0x820/0x860
 [<a00000010003b390>] die+0x190/0x2a0
 [<a000000100066a40>] ia64_do_page_fault+0x8e0/0xa40
 [<a00000010000c7a0>] ia64_native_leave_kernel+0x0/0x270
 [<a0000001003b2660>] pci_remove_bus_device+0x120/0x260
 [<a0000002060549f0>] acpiphp_disable_slot+0x410/0x540 [acpiphp]
 [<a0000002060505c0>] disable_slot+0xc0/0x120 [acpiphp]
 [<a0000002040d21c0>] power_write_file+0x1e0/0x2a0 [pci_hotplug]
 [<a0000001003bb820>] pci_slot_attr_store+0x60/0xa0
 [<a000000100240f70>] sysfs_write_file+0x230/0x2c0
 [<a000000100195750>] vfs_write+0x190/0x2e0
 [<a0000001001961a0>] sys_write+0x80/0x100
 [<a00000010000c600>] ia64_ret_from_syscall+0x0/0x20
 [<a000000000010720>] __kernel_syscall_via_break+0x0/0x20

The root cause of this oops is that the logical remove ("echo 1 >
/sys/bus/pci/devices/$device/remove") destroyed the pci_dev. The
pci_dev struct itself wasn't deallocated because acpiphp kept a
reference, but some of its fields became invalid.

acpiphp doesn't have any real reason to keep a pointer to a
pci_dev around. It can always derive it using pci_get_slot().

If a logical remove destroys the pci_dev, acpiphp won't find it
and is thus prevented from causing mischief.

Reviewed-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reported-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-05-27 02:04:24 -07:00
Rafael J. Wysocki
b3bad72e49 PCI PM: Fix initialization and kexec breakage for some devices
Recent PCI PM changes introduced a bug that causes some devices to be
mishandled after kexec and during early initialization.  The failure
scenario in the kexec case is the following:

* Assume a PCI device is not power-manageable by the platform and has
  PCI_PM_CTRL_NO_SOFT_RESET set in PMCSR.
* The device is put into D3 before kexec (using the native PCI PM).
* After kexec, pci_setup_device() sets the device's power state to
  PCI_UNKNOWN.
* pci_set_power_state(dev, PCI_D0) is called by the device's driver.
* __pci_start_power_transition(dev, PCI_D0) is called and since the
  device is not power-manageable by the platform, it causes
  pci_update_current_state(dev, PCI_D0) to be called.  As a result
  the device's current_state field is updated to PCI_D3, in
  accordance with the contents of its PCI PM registers.
* pci_raw_set_power_state() is called and it changes the device power
  state to D0.  *However*, it should also call pci_restore_bars() to
  reinitialize the device, but it doesn't, because the device's
  current_state field has been modified earlier.

To prevent this from happening, modify pci_platform_power_transition()
so that it doesn't use pci_update_current_state() to update the
current_state field for devices that aren't power-manageable by the
platform.  Instead, this field should be updated directly for devices
that don't support the native PCI PM.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-05-19 15:26:07 -07:00
Linus Torvalds
72357d5955 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI MSI: Fix MSI-X with NIU cards
  PCI: Fix pci-e port driver slot_reset bad default return value
2009-05-15 16:47:55 -07:00
Matthew Wilcox
8d18101853 PCI MSI: Fix MSI-X with NIU cards
The NIU device refuses to allow accesses to MSI-X registers before MSI-X
is enabled.  This patch fixes the problem by moving the read of the mask
register to after MSI-X is enabled.

Reported-by: David S. Miller <davem@davemloft.net>
Tested-by: David S. Miller <davem@davemloft.net>
Reviewed-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-05-11 17:02:27 -07:00
David Woodhouse
fd18de50b9 intel-iommu: PAE memory corruption fix
PAGE_MASK is 0xFFFFF000 on i386 -- even with PAE.

So it's not sufficient to ensure that you use phys_addr_t or uint64_t
everywhere you handle physical addresses -- you also have to avoid using
the construct 'addr & PAGE_MASK', because that will strip the high 32
bits of the address.

This patch avoids that problem by using PHYSICAL_PAGE_MASK instead of
PAGE_MASK where appropriate. It leaves '& PAGE_MASK' in a few instances
that don't matter -- where it's being used on the virtual bus addresses
we're dishing out, which are 32-bit anyway.

Since PHYSICAL_PAGE_MASK is not present on other architectures, we have
to define it (to PAGE_MASK) if it's not already defined.

Maybe it would be better just to fix PAGE_MASK for i386/PAE?

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-11 07:51:01 -07:00
Zhang, Yanmin
029091df01 PCI: Fix pci-e port driver slot_reset bad default return value
When an upstream port reports an AER error to root port, kernel
starts error recovery procedures. The default return value of
function pcie_portdrv_slot_reset is PCI_ERS_RESULT_NONE. If all
port service drivers of the downstream port under the upstream
port have no slot_reset method in pci_error_handlers, AER recovery
would stop without resume. Below patch against 2.6.30-rc3 fixes it.

Signed-off-by: Zhang Yanmin <yanmin.zhang@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-05-05 12:20:57 -07:00
Yu Zhao
1b6b8ce2ac PCI: only save/restore existent registers in the PCIe capability
PCIe 1.1 base neither requires the endpoint to implement the entire
PCIe capability structure nor specifies default values of registers
that are not implemented by the device. So we only save and restore
registers that must be implemented by different device types if the
device PCIe capability version is 1.

PCIe 1.1 Capability Structure Expansion ECN and PCIe 2.0 requires
all registers in the PCIe capability to be either implemented or
hardwired to 0. Their PCIe capability version is 2.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 15:59:41 -07:00
Randy Dunlap
cffb2fafb7 docbooks: add/fix PCI kernel-doc
Add drivers/pci/*.c source files to DocBook/kernel-api.tmpl
and update those pci/*.c source files that need kernel-doc fixes.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 14:49:33 -07:00
Yinghai Lu
681bf59721 PCI: cleanup debug output resources
Remove outputs for 0 sized resources and indicate prefetchability.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 14:49:25 -07:00
Matthew Wilcox
0bb1be3e30 x86/PCI: Move set_pci_bus_resources_arch_default into arch/x86
Commit 30a18d6c3f introduced a new
function to set the PCI bus resources.  Unfortunately, neither the
author, nor the committers seemed to know that we already have somewhere
to do that -- pcibios_fixup_bus().  This patch moves the hook (used only
by the K8 code) into x86-specific code where it should have been in the
first place.

Cc: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 13:57:36 -07:00
Thomas Renninger
162dedd39d PCI quirk: disable MSI on VIA VT3364 chipsets
Without this patch, Broadcom BCM5906 Ethernet controllers set up via MSI
cause the machine to hang.  Tejun agreed that the best is to blacklist
the whole chipset and after adding it, seeing the other VIA quirks
disabling MSI, this very much looks like the right way.

Cc: <stable@kernel.org>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-22 13:53:03 -07:00
Linus Torvalds
7b11428d37 Merge git://git.infradead.org/iommu-2.6
* git://git.infradead.org/iommu-2.6:
  intel-iommu: Avoid panic() for DRHD at address zero.
  Intel-IOMMU Alignment Issue in dma_pte_clear_range()
2009-04-13 11:35:50 -07:00
David Woodhouse
e523b38e2f intel-iommu: Avoid panic() for DRHD at address zero.
If the BIOS does something obviously stupid, like claiming that the
registers for the IOMMU are at physical address zero, then print a nasty
message and abort, rather than trying to set up the IOMMU and then later
panicking.

It's becoming more and more obvious that trusting this stuff to the BIOS
was a mistake.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-10 22:27:48 -07:00
Linus Torvalds
8e2c4f2844 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: pci_slot: grab refcount on slot's bus
  PCI Hotplug: acpiphp: grab refcount on p2p subordinate bus
  PCI: allow PCI core hotplug to remove PCI root bus
  PCI: Fix oops in pci_vpd_truncate
  PCI: don't corrupt enable_cnt when doing manual resource alignment
  PCI: annotate pci_rescan_bus as __ref, not __devinit
  PCI-IOV: fix missing kernel-doc
  PCI: Setup disabled bridges even if buses are added
  PCI: SR-IOV quirk for Intel 82576 NIC
2009-04-07 11:24:19 -07:00
Yang Hongyang
284901a90a dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)
Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07 08:31:11 -07:00
Yang Hongyang
6a35528a83 dma-mapping: replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64)
Replace all DMA_64BIT_MASK macro with DMA_BIT_MASK(64)

Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07 08:31:10 -07:00
Anton Vorontsov
d407e32efe PCI: Fix oops in pci_vpd_truncate
pci_vpd_truncate() should check for dev->vpd->attr, otherwise this might
happen:

  sky2 driver version 1.22
  Unable to handle kernel paging request for data at address 0x0000000c
  Faulting instruction address: 0xc01836fc
  Oops: Kernel access of bad area, sig: 11 [#1]
  [...]
  NIP [c01836fc] pci_vpd_truncate+0x38/0x40
  LR [c029be18] sky2_probe+0x14c/0x518
  Call Trace:
  [ef82bde0] [c029bda4] sky2_probe+0xd8/0x518 (unreliable)
  [ef82be20] [c018a11c] local_pci_probe+0x24/0x34
  [ef82be30] [c018a14c] pci_call_probe+0x20/0x30
  [ef82be50] [c018a330] __pci_device_probe+0x64/0x78
  [ef82be60] [c018a44c] pci_device_probe+0x30/0x58
  [ef82be80] [c01aa270] really_probe+0x78/0x1a0
  [ef82bea0] [c01aa460] __driver_attach+0xa4/0xa8
  [ef82bec0] [c01a96ac] bus_for_each_dev+0x60/0x9c
  [ef82bef0] [c01aa0b4] driver_attach+0x24/0x34
  [ef82bf00] [c01a9e08] bus_add_driver+0x12c/0x1cc
  [ef82bf20] [c01aa87c] driver_register+0x6c/0x110
  [ef82bf30] [c018a770] __pci_register_driver+0x4c/0x9c
  [ef82bf50] [c03782c8] sky2_init_module+0x30/0x40
  [ef82bf60] [c0001dbc] do_one_initcall+0x34/0x1a0
  [ef82bfd0] [c0362240] do_initcalls+0x38/0x58

This happens with CONFIG_SKY2=y, and "ip=on" kernel command line, so
pci_vpd_truncate() is called before late_initcall(pci_sysfs_init),
therefore ->attr isn't yet initialized.

Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-04-07 08:05:38 -07:00
Fenghua Yu
31d3568dfe Intel-IOMMU Alignment Issue in dma_pte_clear_range()
This issue was pointed out by Linus.

In dma_pte_clear_range() in intel-iommu.c

start = PAGE_ALIGN(start);
end &= PAGE_MASK;
npages = (end - start) / VTD_PAGE_SIZE;

In partial page case, start could be bigger than end and npages will be
negative.

Currently the issue doesn't show up as a real bug in because start and 
end have been aligned to page boundary already by all callers. So the 
issue has been hidden. But it is dangerous programming practice.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-06 14:47:00 -07:00
Linus Torvalds
ffa009c366 Merge git://git.infradead.org/iommu-2.6
* git://git.infradead.org/iommu-2.6:
  drivers/pci/intr_remapping.c: include acpi.h
  intel-iommu: Fix oops in device_to_iommu() when devices not found.
  intel-iommu: Handle PCI domains appropriately.
  intel-iommu: Fix device-to-iommu mapping for PCI-PCI bridges.
  x2apic/intr-remap: decouple interrupt remapping from x2apic
  x86, dmar: check if it's initialized before disable queue invalidation
  intel-iommu: set compatibility format interrupt
  Intel IOMMU Suspend/Resume Support - Interrupt Remapping
  Intel IOMMU Suspend/Resume Support - Queued Invalidation
  Intel IOMMU Suspend/Resume Support - DMAR
  intel-iommu: Add for_each_iommu() and for_each_active_iommu() macros
2009-04-06 14:26:05 -07:00
Alexander Beregalov
46f06b7237 drivers/pci/intr_remapping.c: include acpi.h
Fix this build error:
drivers/pci/intr_remapping.c: In function 'ir_parse_ioapic_scope':
drivers/pci/intr_remapping.c:617: error: invalid use of undefined type
				         'struct acpi_dmar_hardware_unit'

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-06 13:45:48 -07:00
David Woodhouse
4958c5dc7b intel-iommu: Fix oops in device_to_iommu() when devices not found.
It's possible for a device in the drhd->devices[] array to be NULL if
it wasn't found at boot time, which means we have to check for that
case.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-06 13:30:01 -07:00
Alex Chiang
5d4a4b25dd PCI Hotplug: acpiphp: grab refcount on p2p subordinate bus
If a logical hot unplug (remove) is performed on a bridge claimed
by acpiphp and then acpiphp is unloaded, we will encounter an oops.

This is because acpiphp will access the bridge's subordinate bus,
which was released by the user's prior hot unplug.

The solution is to grab a reference on the subordinate PCI bus.
This will prevent the bus from release until acpiphp is unloaded.

Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reported-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:30:26 -07:00
Alex Chiang
c2ac7cdc67 PCI: allow PCI core hotplug to remove PCI root bus
There is no reason to prevent removal of root bus devices. A subsequent
rescan will find them just fine.

Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:30:02 -07:00
Anton Vorontsov
d6141668c2 PCI: Fix oops in pci_vpd_truncate
pci_vpd_truncate() should check for dev->vpd->attr, otherwise
this might happen:

sky2 driver version 1.22
Unable to handle kernel paging request for data at address 0x0000000c
Faulting instruction address: 0xc01836fc
Oops: Kernel access of bad area, sig: 11 [#1]
[...]
NIP [c01836fc] pci_vpd_truncate+0x38/0x40
LR [c029be18] sky2_probe+0x14c/0x518
Call Trace:
[ef82bde0] [c029bda4] sky2_probe+0xd8/0x518 (unreliable)
[ef82be20] [c018a11c] local_pci_probe+0x24/0x34
[ef82be30] [c018a14c] pci_call_probe+0x20/0x30
[ef82be50] [c018a330] __pci_device_probe+0x64/0x78
[ef82be60] [c018a44c] pci_device_probe+0x30/0x58
[ef82be80] [c01aa270] really_probe+0x78/0x1a0
[ef82bea0] [c01aa460] __driver_attach+0xa4/0xa8
[ef82bec0] [c01a96ac] bus_for_each_dev+0x60/0x9c
[ef82bef0] [c01aa0b4] driver_attach+0x24/0x34
[ef82bf00] [c01a9e08] bus_add_driver+0x12c/0x1cc
[ef82bf20] [c01aa87c] driver_register+0x6c/0x110
[ef82bf30] [c018a770] __pci_register_driver+0x4c/0x9c
[ef82bf50] [c03782c8] sky2_init_module+0x30/0x40
[ef82bf60] [c0001dbc] do_one_initcall+0x34/0x1a0
[ef82bfd0] [c0362240] do_initcalls+0x38/0x58

This happens with CONFIG_SKY2=y, and "ip=on" kernel command line, so
pci_vpd_truncate() is called before late_initcall(pci_sysfs_init),
therefore ->attr isn't yet initialized.

Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:28:35 -07:00
Yuji Shimada
0cdbe30f0b PCI: don't corrupt enable_cnt when doing manual resource alignment
This patch fixes breakage of of enable_cnt in quirk_resource_alignment.

Currently, quirk_resource_alignment calls pci_disable_device.
pci_disable_device decrements enable_cnt, so that enable_cnt becomes -1.

The patch disables memory decoding, writing command register directly.
So enable_cnt is not broken.

Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:27:58 -07:00
Alex Chiang
5446a6bdb5 PCI: annotate pci_rescan_bus as __ref, not __devinit
pci_rescan_bus was annotated as __devinit, which is wrong,
because it will never be part of device initialization.
Howevever, we can't simply drop the annotation, because then we
get section warnings about calling pci_scan_child_bus (which is
correctly marked as __devinit).

pci_rescan_bus will only get built when CONFIG_HOTPLUG is set,
meaning that __devinit is a nop, so we know that pci_scan_child_bus
has not been freed.

Annotate as __ref to silence modpost.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:26:07 -07:00
Randy Dunlap
52a8873ba4 PCI-IOV: fix missing kernel-doc
Fix PCI iov kernel-doc warning:

Warning(drivers/pci/iov.c:638): No description found for parameter 'nr_virtfn'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:25:33 -07:00
Yuji Shimada
296ccb086d PCI: Setup disabled bridges even if buses are added
This patch sets up disabled bridges even if buses have already been
added.

pci_assign_unassigned_resources is called after buses are added.
pci_assign_unassigned_resources calls pci_bus_assign_resources.
pci_bus_assign_resources calls pci_setup_bridge to configure BARs of
bridges.

Currently pci_setup_bridge returns immediately if the bus have already
been added. So pci_assign_unassigned_resources can't configure BARs of
bridges that were added in a disabled state; this patch fixes the issue.

On logical hot-add, we need to prevent the kernel from re-initializing
bridges that have already been initialized. To achieve this,
pci_setup_bridge returns immediately if the bridge have already been
enabled.

We don't need to check whether the specified bus is a root bus or not.
pci_setup_bridge is not called on a root bus, because a root bus does
not have a bridge.

The patch adds a new helper function, pci_is_enabled. I made the
function name similar to pci_is_managed. The codes which use
enable_cnt directly are changed to use pci_is_enabled.

Acked-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:25:06 -07:00
Yu Zhao
7eb93b175d PCI: SR-IOV quirk for Intel 82576 NIC
If BIOS doesn't allocate resources for the SR-IOV BARs, zero the Flash
BAR and program the SR-IOV BARs to use the old Flash Memory Space.

Please refer to Intel 82576 Gigabit Ethernet Controller Datasheet
section 7.9.2.14.2 for details.
http://download.intel.com/design/network/datashts/82576_Datasheet.pdf

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-04-06 11:21:40 -07:00
Linus Torvalds
32fb6c1756 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (140 commits)
  ACPI: processor: use .notify method instead of installing handler directly
  ACPI: button: use .notify method instead of installing handler directly
  ACPI: support acpi_device_ops .notify methods
  toshiba-acpi: remove MAINTAINERS entry
  ACPI: battery: asynchronous init
  acer-wmi: Update copyright notice & documentation
  acer-wmi: Cleanup the failure cleanup handling
  acer-wmi: Blacklist Acer Aspire One
  video: build fix
  thinkpad-acpi: rework brightness support
  thinkpad-acpi: enhanced debugging messages for the fan subdriver
  thinkpad-acpi: enhanced debugging messages for the hotkey subdriver
  thinkpad-acpi: enhanced debugging messages for rfkill subdrivers
  thinkpad-acpi: restrict access to some firmware LEDs
  thinkpad-acpi: remove HKEY disable functionality
  thinkpad-acpi: add new debug helpers and warn of deprecated atts
  thinkpad-acpi: add missing log levels
  thinkpad-acpi: cleanup debug helpers
  thinkpad-acpi: documentation cleanup
  thinkpad-acpi: drop ibm-acpi alias
  ...
2009-04-05 11:16:25 -07:00
Linus Torvalds
90975ef712 Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask: (36 commits)
  cpumask: remove cpumask allocation from idle_balance, fix
  numa, cpumask: move numa_node_id default implementation to topology.h, fix
  cpumask: remove cpumask allocation from idle_balance
  x86: cpumask: x86 mmio-mod.c use cpumask_var_t for downed_cpus
  x86: cpumask: update 32-bit APM not to mug current->cpus_allowed
  x86: microcode: cleanup
  x86: cpumask: use work_on_cpu in arch/x86/kernel/microcode_core.c
  cpumask: fix CONFIG_CPUMASK_OFFSTACK=y cpu hotunplug crash
  numa, cpumask: move numa_node_id default implementation to topology.h
  cpumask: convert node_to_cpumask_map[] to cpumask_var_t
  cpumask: remove x86 cpumask_t uses.
  cpumask: use cpumask_var_t in uv_flush_tlb_others.
  cpumask: remove cpumask_t assignment from vector_allocation_domain()
  cpumask: make Xen use the new operators.
  cpumask: clean up summit's send_IPI functions
  cpumask: use new cpumask functions throughout x86
  x86: unify cpu_callin_mask/cpu_callout_mask/cpu_initialized_mask/cpu_sibling_setup_mask
  cpumask: convert struct cpuinfo_x86's llc_shared_map to cpumask_var_t
  cpumask: convert node_to_cpumask_map[] to cpumask_var_t
  x86: unify 32 and 64-bit node_to_cpumask_map
  ...
2009-04-05 10:33:07 -07:00
Len Brown
478c6a43fc Merge branch 'linus' into release
Conflicts:
	arch/x86/kernel/cpu/cpufreq/longhaul.c

Signed-off-by: Len Brown <len.brown@intel.com>
2009-04-05 02:14:15 -04:00
David Woodhouse
276dbf9970 intel-iommu: Handle PCI domains appropriately.
We were comparing {bus,devfn} and assuming that a match meant it was the
same device. It doesn't -- the same {bus,devfn} can exist in
multiple PCI domains. Include domain number in device identification
(and call it 'segment' in most places, because there's already a lot of
references to 'domain' which means something else, and this code is
infected with ACPI thinking already).

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-04 10:43:31 +01:00
David Woodhouse
924b6231ed intel-iommu: Fix device-to-iommu mapping for PCI-PCI bridges.
When the DMAR table identifies that a PCI-PCI bridge belongs to a given
IOMMU, that means that the bridge and all devices behind it should be
associated with the IOMMU. Not just the bridge itself.

This fixes the device_to_iommu() function accordingly.

(It's broken if you have the same PCI bus numbers in multiple domains,
but this function was always broken in that way; I'll be dealing with
that later).

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-04 10:43:29 +01:00
Han, Weidong
d0b03bd1c6 x2apic/intr-remap: decouple interrupt remapping from x2apic
interrupt remapping must be enabled before enabling x2apic, but
interrupt remapping doesn't depend on x2apic, it can be used
separately. Enable interrupt remapping in init_dmars even x2apic
is not supported.

[dwmw2: Update Kconfig accordingly, fix build with INTR_REMAP && !X2APIC]

Signed-off-by: Weidong Han <weidong.han@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-04 10:42:28 +01:00
Han, Weidong
34aaaa948e x86, dmar: check if it's initialized before disable queue invalidation
If queue invalidation is disabled after it's already initialized,
dmar_enable_qi won't re-enable it due to iommu->qi is allocated.
It may result in system hang when use queue invalidation. Add this
check to avoid this case.

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-04-04 10:41:32 +01:00
Linus Torvalds
811158b147 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits)
  trivial: Update my email address
  trivial: NULL noise: drivers/mtd/tests/mtd_*test.c
  trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h
  trivial: Fix misspelling of "Celsius".
  trivial: remove unused variable 'path' in alloc_file()
  trivial: fix a pdlfush -> pdflush typo in comment
  trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL
  trivial: wusb: Storage class should be before const qualifier
  trivial: drivers/char/bsr.c: Storage class should be before const qualifier
  trivial: h8300: Storage class should be before const qualifier
  trivial: fix where cgroup documentation is not correctly referred to
  trivial: Give the right path in Documentation example
  trivial: MTD: remove EOL from MODULE_DESCRIPTION
  trivial: Fix typo in bio_split()'s documentation
  trivial: PWM: fix of #endif comment
  trivial: fix typos/grammar errors in Kconfig texts
  trivial: Fix misspelling of firmware
  trivial: cgroups: documentation typo and spelling corrections
  trivial: Update contact info for Jochen Hein
  trivial: fix typo "resgister" -> "register"
  ...
2009-04-03 15:24:35 -07:00