Commit Graph

138 Commits

Author SHA1 Message Date
Greg Kroah-Hartman 5136b2da77 PCI: convert bus code to use dev_groups
The dev_attrs field of struct bus_type is going away soon, dev_groups
should be used instead.  This converts the PCI bus code to use the
correct field.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-10-07 14:58:42 -06:00
Greg Kroah-Hartman 0f49ba5599 PCI: convert bus code to use bus_groups
The bus_attrs field of struct bus_type is going away soon, dev_groups
should be used instead.  This converts the PCI bus code to use the
correct field.

Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-10-07 14:51:02 -06:00
Linus Torvalds cc998ff881 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking changes from David Miller:
 "Noteworthy changes this time around:

   1) Multicast rejoin support for team driver, from Jiri Pirko.

   2) Centralize and simplify TCP RTT measurement handling in order to
      reduce the impact of bad RTO seeding from SYN/ACKs.  Also, when
      both timestamps and local RTT measurements are available prefer
      the later because there are broken middleware devices which
      scramble the timestamp.

      From Yuchung Cheng.

   3) Add TCP_NOTSENT_LOWAT socket option to limit the amount of kernel
      memory consumed to queue up unsend user data.  From Eric Dumazet.

   4) Add a "physical port ID" abstraction for network devices, from
      Jiri Pirko.

   5) Add a "suppress" operation to influence fib_rules lookups, from
      Stefan Tomanek.

   6) Add a networking development FAQ, from Paul Gortmaker.

   7) Extend the information provided by tcp_probe and add ipv6 support,
      from Daniel Borkmann.

   8) Use RCU locking more extensively in openvswitch data paths, from
      Pravin B Shelar.

   9) Add SCTP support to openvswitch, from Joe Stringer.

  10) Add EF10 chip support to SFC driver, from Ben Hutchings.

  11) Add new SYNPROXY netfilter target, from Patrick McHardy.

  12) Compute a rate approximation for sending in TCP sockets, and use
      this to more intelligently coalesce TSO frames.  Furthermore, add
      a new packet scheduler which takes advantage of this estimate when
      available.  From Eric Dumazet.

  13) Allow AF_PACKET fanouts with random selection, from Daniel
      Borkmann.

  14) Add ipv6 support to vxlan driver, from Cong Wang"

Resolved conflicts as per discussion.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1218 commits)
  openvswitch: Fix alignment of struct sw_flow_key.
  netfilter: Fix build errors with xt_socket.c
  tcp: Add missing braces to do_tcp_setsockopt
  caif: Add missing braces to multiline if in cfctrl_linkup_request
  bnx2x: Add missing braces in bnx2x:bnx2x_link_initialize
  vxlan: Fix kernel panic on device delete.
  net: mvneta: implement ->ndo_do_ioctl() to support PHY ioctls
  net: mvneta: properly disable HW PHY polling and ensure adjust_link() works
  icplus: Use netif_running to determine device state
  ethernet/arc/arc_emac: Fix huge delays in large file copies
  tuntap: orphan frags before trying to set tx timestamp
  tuntap: purge socket error queue on detach
  qlcnic: use standard NAPI weights
  ipv6:introduce function to find route for redirect
  bnx2x: VF RSS support - VF side
  bnx2x: VF RSS support - PF side
  vxlan: Notify drivers for listening UDP port changes
  net: usbnet: update addr_assign_type if appropriate
  driver/net: enic: update enic maintainers and driver
  driver/net: enic: Exposing symbols for Cisco's low latency driver
  ...
2013-09-05 14:54:29 -07:00
Jacob Keller 343e51ae6e PCI: expose pcie_link_speed and pcix_bus_speed arrays
pcie_link_speed and pcix_bus_speed are arrays used by probe.c to correctly
convert lnksta register values into the pci_bus_speed enum. These static arrays
are useful outside probe for this purpose. This patch makes these defines into
conist arrays and exposes them with an extern header in drivers/pci/pci.h

-v2-
* move extern declarations to drivers/pci/pci.h

CC: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2013-07-30 18:16:36 -07:00
Greg Kroah-Hartman 56039e658c PCI: Convert class code to use dev_groups
The dev_attrs field of struct class is going away soon, dev_groups
should be used instead.  This converts the PCI class code to use the
correct field.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-07-25 12:18:42 -06:00
Jiang Liu d66ecb7220 PCI / ACPI: Use boot-time resource allocation rules during hotplug
On x86 platforms, the kernel respects PCI resource assignments from
the BIOS and only reassigns resources for unassigned BARs at boot
time.  However, with the ACPI-based hotplug (acpiphp), it ignores the
BIOS' PCI resource assignments completely and reassigns all resources
by itself.  This causes differences in PCI resource allocation
between boot time and runtime hotplug to occur, which is generally
undesirable and sometimes actively breaks things.

Namely, if there are enough resources, reassigning all PCI resources
during runtime hotplug should work, but it may fail if the resources
are constrained.  This may happen, for instance, when some PCI
devices with huge MMIO BARs are involved in the runtime hotplug
operations, because the current PCI MMIO alignment algorithm may
waste huge chunks of MMIO address space in those cases.

On the Alexander's Sony VAIO VPCZ23A4R the BIOS allocates limited
MMIO resources for the dock station which contains a device
(graphics adapter) with a 256MB MMIO BAR.  An attempt to reassign
that during runtime hotplug causes the dock station MMIO window to be
exhausted and acpiphp fails to allocate resources for the majority
of devices on the dock station as a result.

To prevent that from happening, modify acpiphp to follow the boot
time resources allocation behavior so that the BIOS' resource
assignments are respected during runtime hotplug too.

[rjw: Changelog]
References: https://bugzilla.kernel.org/show_bug.cgi?id=56531
Reported-and-tested-by: Alexander E. Patrakov <patrakov@gmail.com>
Tested-by: Illya Klymov <xanf@xanf.me>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: 3.9+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-23 01:01:35 +02:00
Bjorn Helgaas f39d5b7291 PCI: Remove "extern" from function declarations
We had an inconsistent mix of using and omitting the "extern" keyword
on function declarations in header files.  This removes them all.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-04-17 10:21:17 -06:00
Bjorn Helgaas 939de1d69c Merge branch 'pci/yinghai-root-bus-hotplug' into next
* pci/yinghai-root-bus-hotplug:
  PCI: Put pci_dev in device tree as early as possible
  PCI: Skip attaching driver in device_add()
  PCI: acpiphp: Keep driver loaded even if no slots found
  PCI/ACPI: Print info if host bridge notify handler installation fails
  PCI: acpiphp: Move host bridge hotplug to pci_root.c
  PCI/ACPI: acpiphp: Rename alloc_acpiphp_hp_work() to alloc_acpi_hp_work()
  PCI: Make device create/destroy logic symmetric
  PCI: Fix reference count leak in pci_dev_present()
  PCI: Set pci_dev dev_node early so IOAPIC irq_descs are allocated locally
  PCI: Add root bus children dev's res to fail list
  PCI: acpiphp: Add is_hotplug_bridge detection

Conflicts:
	drivers/pci/pci.h
2013-01-26 17:35:58 -07:00
Bjorn Helgaas 14b5cb37cc Merge branch 'pci/yijing-ari' into next
* pci/yijing-ari:
  PCI: shpchp: Iterate over all devices in slot, not functions 0-7
  PCI: sgihp: Iterate over all devices in slot, not functions 0-7
  PCI: cpcihp: Iterate over all devices in slot, not functions 0-7
  PCI: pciehp: Iterate over all devices in slot, not functions 0-7
  PCI: Consolidate "next-function" functions
  PCI: Rename pci_enable_ari() to pci_configure_ari()
  PCI: Enable ARI if dev and upstream bridge support it; disable otherwise
2013-01-26 17:27:36 -07:00
Yinghai Lu 4f535093cf PCI: Put pci_dev in device tree as early as possible
We want to put pci_dev structs in the device tree as soon as possible so
for_each_pci_dev() iteration will not miss them, but driver attachment
needs to be delayed until after pci_assign_unassigned_resources() to make
sure all devices have resources assigned first.

This patch moves device registering from pci_bus_add_devices() to
pci_device_add(), which happens earlier, leaving driver attachment in
pci_bus_add_devices().

It also removes unattached child bus handling in pci_bus_add_devices().
That's not needed because child bus via pci_add_new_bus() is already
in parent bus children list.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-01-25 16:22:37 -07:00
Yijing Wang 31ab247623 PCI: Rename pci_enable_ari() to pci_configure_ari()
pci_enable_ari() now supports enabling or disabling ARI forwarding.  So
rename pci_enable_ari() to pci_configure_ari() for easy understanding.

No functional change.

[bhelgaas: changelog]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-01-25 09:21:10 -07:00
Rafael J. Wysocki d2e5f0c16a ACPI / PCI: Rework the setup and cleanup of device wakeup
Currently, the ACPI wakeup capability of PCI devices is set up
in two different places, partially in acpi_pci_bind() where
runtime wakeup is initialized and partially in
platform_pci_wakeup_init(), where system wakeup is initialized.
The cleanup is only done in acpi_pci_unbind() and it only covers
runtime wakeup.

Use the new .setup() and .cleanup() callbacks in struct acpi_bus_type
to consolidate that code and do the setup and the cleanup each in one
place.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Toshi Kani <toshi.kani@hp.com>
2013-01-03 13:09:41 +01:00
Linus Torvalds 193c0d6825 PCI changes for the v3.8 merge window:
Host bridge hotplug:
     - Untangle _PRT from struct pci_bus (Bjorn Helgaas)
     - Request _OSC control before scanning root bus (Taku Izumi)
     - Assign resources when adding host bridge (Yinghai Lu)
     - Remove root bus when removing host bridge (Yinghai Lu)
     - Remove _PRT during hot remove (Yinghai Lu)
 
   SRIOV
     - Add sysfs knobs to control numVFs (Don Dutile)
 
   Power management
     - Notify devices when power resource turned on (Huang Ying)
 
   Bug fixes
     - Work around broken _SEG on HP xw9300 (Bjorn Helgaas)
     - Keep runtime PM enabled for unbound PCI devices (Huang Ying)
     - Fix Optimus dual-GPU runtime D3 suspend issue (Dave Airlie)
     - Fix xen frontend shutdown issue (David Vrabel)
     - Work around PLX PCI 9050 BAR alignment erratum (Ian Abbott)
 
   Miscellaneous
     - Add GPL license for drivers/pci/ioapic (Andrew Cooks)
     - Add standard PCI-X, PCIe ASPM register #defines (Bjorn Helgaas)
     - NumaChip remote PCI support (Daniel Blueman)
     - Fix PCIe Link Capabilities Supported Link Speed definition (Jingoo Han)
     - Convert dev_printk() to dev_info(), etc (Joe Perches)
     - Add support for non PCI BAR ROM data (Matthew Garrett)
     - Add x86 support for host bridge translation offset (Mike Yoknis)
     - Report success only when every driver supports AER (Vijay Pandarathil)
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Merge tag 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI update from Bjorn Helgaas:
 "Host bridge hotplug:
   - Untangle _PRT from struct pci_bus (Bjorn Helgaas)
   - Request _OSC control before scanning root bus (Taku Izumi)
   - Assign resources when adding host bridge (Yinghai Lu)
   - Remove root bus when removing host bridge (Yinghai Lu)
   - Remove _PRT during hot remove (Yinghai Lu)

  SRIOV
    - Add sysfs knobs to control numVFs (Don Dutile)

  Power management
   - Notify devices when power resource turned on (Huang Ying)

  Bug fixes
   - Work around broken _SEG on HP xw9300 (Bjorn Helgaas)
   - Keep runtime PM enabled for unbound PCI devices (Huang Ying)
   - Fix Optimus dual-GPU runtime D3 suspend issue (Dave Airlie)
   - Fix xen frontend shutdown issue (David Vrabel)
   - Work around PLX PCI 9050 BAR alignment erratum (Ian Abbott)

  Miscellaneous
   - Add GPL license for drivers/pci/ioapic (Andrew Cooks)
   - Add standard PCI-X, PCIe ASPM register #defines (Bjorn Helgaas)
   - NumaChip remote PCI support (Daniel Blueman)
   - Fix PCIe Link Capabilities Supported Link Speed definition (Jingoo
     Han)
   - Convert dev_printk() to dev_info(), etc (Joe Perches)
   - Add support for non PCI BAR ROM data (Matthew Garrett)
   - Add x86 support for host bridge translation offset (Mike Yoknis)
   - Report success only when every driver supports AER (Vijay
     Pandarathil)"

Fix up trivial conflicts.

* tag 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits)
  PCI: Use phys_addr_t for physical ROM address
  x86/PCI: Add NumaChip remote PCI support
  ath9k: Use standard #defines for PCIe Capability ASPM fields
  iwlwifi: Use standard #defines for PCIe Capability ASPM fields
  iwlwifi: collapse wrapper for pcie_capability_read_word()
  iwlegacy: Use standard #defines for PCIe Capability ASPM fields
  iwlegacy: collapse wrapper for pcie_capability_read_word()
  cxgb3: Use standard #defines for PCIe Capability ASPM fields
  PCI: Add standard PCIe Capability Link ASPM field names
  PCI/portdrv: Use PCI Express Capability accessors
  PCI: Use standard PCIe Capability Link register field names
  x86: Use PCI setup data
  PCI: Add support for non-BAR ROMs
  PCI: Add pcibios_add_device
  EFI: Stash ROMs if they're not in the PCI BAR
  PCI: Add and use standard PCI-X Capability register names
  PCI/PM: Keep runtime PM enabled for unbound PCI devices
  xen-pcifront: Handle backend CLOSED without CLOSING
  PCI: SRIOV control and status via sysfs (documentation)
  PCI/AER: Report success only when every device has AER-aware driver
  ...
2012-12-13 12:14:47 -08:00
Bill Pemberton 8ccc9aa17a PCI: Move pci_uevent into pci-driver.c
With the demise of CONFIG_HOTPLUG as an option, the pci_uevent
function located in hotplug.c will now always be used and doesn't need
special treatment in the Makefile.  Move pci_uevent into pci-driver.c
and remove hotplug.c

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28 13:00:58 -08:00
Bill Pemberton b40b97ae73 PCI: Remove CONFIG_HOTPLUG ifdefs
Remove conditional code based on CONFIG_HOTPLUG being false.  It's
always on now in preparation of it going away as an option.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28 12:53:46 -08:00
Bjorn Helgaas d3fe3988fb Merge branch 'for-linus' into next
* for-linus:
  PCI/portdrv: Don't create hotplug slots unless port supports hotplug
  PCI/PM: Fix proc config reg access for D3cold and bridge suspending
  PCI/PM: Resume device before shutdown
  PCI/PM: Fix deadlock when unbinding device if parent in D3cold
2012-11-26 13:00:57 -07:00
Bjorn Helgaas 6b13672469 PCI: Use spec names for SR-IOV capability fields
Use the same names (almost) as the spec for TotalVFs, InitialVFs, NumVFs.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-11-09 21:38:53 -07:00
Donald Dutile bff73156d3 PCI: Provide method to reduce the number of total VFs supported
Some implementations of SRIOV provide a capability structure
value of TotalVFs that is greater than what the software can support.
Provide a method to reduce the capability structure reported value
to the value the driver can support.
This ensures sysfs reports the current capability of the system,
hardware and software.
Example for its use: igb & ixgbe -- report 8 & 64 as TotalVFs,
but drivers only support 7 & 63 maximum.

Signed-off-by: Donald Dutile <ddutile@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-11-09 21:37:39 -07:00
Yinghai Lu 4e15c46bdc PCI: Add pci_device_type to pdev's device struct
Need type filled in device structure so it can be used for visible
attribute control in sysfs for pci_dev.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-11-09 20:07:31 -07:00
Huang Ying b3c32c4f95 PCI/PM: Fix proc config reg access for D3cold and bridge suspending
In https://bugzilla.kernel.org/show_bug.cgi?id=48981
Peter reported that /proc/bus/pci/??/??.? does not work for 3.6.
This is because the device configuration space registers are
not accessible if the corresponding parent bridge is suspended or
the device is put into D3cold state.

This is the same as /sys/bus/pci/devices/0000:??:??.?/config access
issue.  So the function used to solve sysfs issue is used to solve
this issue.

This patch moves pci_config_pm_runtime_get()/_put() from pci/pci-sysfs.c
to pci/pci.c and makes them extern so they can be used by both the
sysfs and proc paths.

[bhelgaas: changelog, references, reporters]
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=48981
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=49031
Reported-by: Forrest Loomis <cybercyst@gmail.com>
Reported-by: Peter <lekensteyn@gmail.com>
Reported-by: Micael Dias <kam1kaz3@gmail.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org		# v3.6+
2012-11-05 10:46:23 -07:00
Bjorn Helgaas a7711ba109 Merge branch 'pci/rafael-pci_set_power_state-rebase' into next
* pci/rafael-pci_set_power_state-rebase:
  PCI / PM: restore the original behavior of pci_set_power_state()
2012-07-05 16:29:52 -06:00
Rafael J. Wysocki db288c9c5f PCI / PM: restore the original behavior of pci_set_power_state()
Commit cc2893b6 (PCI: Ensure we re-enable devices on resume)
addressed the problem with USB not being powered after resume on
recent Lenovo machines, but it did that in a suboptimal way.
Namely, it should have changed the relevant code paths only,
which are pci_pm_resume_noirq() and pci_pm_restore_noirq() supposed
to restore the device's power and standard configuration registers
after system resume from suspend or hibernation.  Instead, however,
it modified pci_set_power_state() which is executed in several
other situations too.  That resulted in some undesirable effects,
like attempting to change a device's power state in the same way
multiple times in a row (up to as many as 4 times in a row in the
snd_hda_intel driver).

Fix the bug addressed by commit cc2893b6 in an alternative way,
by forcibly powering up all devices in pci_pm_default_resume_early(),
which is called by pci_pm_resume_noirq() and pci_pm_restore_noirq()
to restore the device's power and standard configuration registers,
and modifying pci_pm_runtime_resume() to avoid the forcible power-up
if not necessary.  Then, revert the changes made by commit cc2893b6
to make the confusion introduced by it go away.

Acked-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-07-05 15:20:00 -06:00
Bjorn Helgaas 35e7f73c32 Merge branch 'topic/huang-d3cold-v7' into next
* topic/huang-d3cold-v7:
  PCI/PM: add PCIe runtime D3cold support
  PCI: do not call pci_set_power_state with PCI_D3cold
  PCI/PM: add runtime PM support to PCIe port
  ACPI/PM: specify lowest allowed state for device sleep state
2012-06-23 11:59:43 -06:00
Huang Ying 448bd857d4 PCI/PM: add PCIe runtime D3cold support
This patch adds runtime D3cold support and corresponding ACPI platform
support.  This patch only enables runtime D3cold support; it does not
enable D3cold support during system suspend/hibernate.

D3cold is the deepest power saving state for a PCIe device, where its main
power is removed.  While it is in D3cold, you can't access the device at
all, not even its configuration space (which is still accessible in D3hot).
Therefore the PCI PM registers can not be used to transition into/out of
the D3cold state; that must be done by platform logic such as ACPI _PR3.

To support wakeup from D3cold, a system may provide auxiliary power, which
allows a device to request wakeup using a Beacon or the sideband WAKE#
signal.  WAKE# is usually connected to platform logic such as ACPI GPE.
This is quite different from other power saving states, where devices
request wakeup via a PME message on the PCIe link.

Some devices, such as those in plug-in slots, have no direct platform
logic.  For example, there is usually no ACPI _PR3 for them.  D3cold
support for these devices can be done via the PCIe Downstream Port leading
to the device.  When the PCIe port is powered on/off, the device is powered
on/off too.  Wakeup events from the device will be notified to the
corresponding PCIe port.

For more information about PCIe D3cold and corresponding ACPI support,
please refer to:

- PCI Express Base Specification Revision 2.0
- Advanced Configuration and Power Interface Specification Revision 5.0

[bhelgaas: changelog]
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Originally-by: Zheng Yan <zheng.z.yan@intel.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-06-23 10:50:59 -06:00
Bjorn Helgaas cc2fa3fa32 Merge branch 'topic/alex-vfio-prep' into next
* topic/alex-vfio-prep:
  PCI: misc pci_reg additions
  PCI: create common pcibios_err_to_errno
  PCI: export pci_user functions for use by other drivers
  PCI: add ACS validation utility
  PCI: add PCI DMA source ID quirk
2012-06-13 17:04:54 -06:00
Yinghai Lu 06aef8cec7 PCI: hotplug: remove pci_do_scan_bus()
All callers of pci_do_scan_bus() are gone, so remove it.

Note that pci_do_scan_bus() was exported, so out-of-tree modules could
depend on it.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-06-13 15:42:27 -06:00
Yinghai Lu a8e4b9c101 PCI: add generic pci_hp_add_bridge()
This creates a generic pci_hp_add_bridge() that can be used by several
hotplug drivers.

[bhelgaas: split out from pciehp patch]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-06-13 15:42:26 -06:00
Alex Williamson c63587d7f5 PCI: export pci_user functions for use by other drivers
VFIO PCI support will make use of these for user-initiated
PCI config accesses.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2012-06-12 09:21:42 -06:00
Yinghai Lu 2069ecfbe1 PCI: Move "pci reassigndev resource alignment" out of quirks.c
This isn't really a quirk; calling it directly from pci_add_device makes
more sense.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-02-24 14:37:26 -08:00
Yinghai Lu b55438fdd5 PCI: prepare pci=realloc for multiple options
Let the user could enable and disable with pci=realloc=on or pci=realloc=off

Also
1. move variable and functions near the place they are used.
2. change macro to function
3. change related functions and variable to static and _init
4. update parameter description accordingly.

This will let us add a config option to control default behavior, and
still allow the user to turn off automatic reallocation if it fails on
their platform until a permanent solution is found.

-v2: still honor pci=realloc, and treat it as pci=realloc=on
     also use enum instead of ...
-v3: update kernel-paramenters.txt according to Jesse.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-02-24 08:47:42 -08:00
Yinghai Lu f796841e49 PCI: fix memleak for pci dev removing during hotplug
unreferenced object 0xffff880276d17700 (size 64):
  comm "swapper/0", pid 1, jiffies 4294897182 (age 3976.028s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 18 f9 de 76 02 88 ff ff  ...........v....
    10 00 00 00 0e 00 00 00 0f 28 40 00 00 00 00 00  .........(@.....
  backtrace:
    [<ffffffff81c8aede>] kmemleak_alloc+0x26/0x43
    [<ffffffff811385f0>] __kmalloc+0x121/0x183
    [<ffffffff813cf821>] pci_add_cap_save_buffer+0x35/0x7c
    [<ffffffff813d12b7>] pci_allocate_cap_save_buffers+0x1d/0x65
    [<ffffffff813cdb52>] pci_device_add+0x92/0xf1
    [<ffffffff81c8afe6>] pci_scan_single_device+0x9f/0xa1
    [<ffffffff813cdbd2>] pci_scan_slot.part.20+0x21/0x106
    [<ffffffff813cdce2>] pci_scan_slot+0x2b/0x35
    [<ffffffff81c8dae4>] __pci_scan_child_bus+0x51/0x107
    [<ffffffff81c8d75b>] pci_scan_bridge+0x376/0x6ae
    [<ffffffff81c8db60>] __pci_scan_child_bus+0xcd/0x107
    [<ffffffff81c8dbab>] pci_scan_child_bus+0x11/0x2a
    [<ffffffff81cca58c>] pci_acpi_scan_root+0x18b/0x21c
    [<ffffffff81c916be>] acpi_pci_root_add+0x1e1/0x42a
    [<ffffffff81406210>] acpi_device_probe+0x50/0x190
    [<ffffffff814a0227>] really_probe+0x99/0x126

Need to free saved_buffer for capabilities.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-02-23 12:08:53 -08:00
Yinghai Lu efdc87dab1 PCI: Separate pci_bus_read_dev_vendor_id from pci_scan_device
We can reuse it for pciehp probing.

-v2: according to Kenji, fix crs timeout checking, and export the function
     for later use when pciehp is compiled as a module.

Suggested-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-02-14 08:44:59 -08:00
Hao, Xudong 1900ca132f PCI: Enable ATS at the device state restore
During S3 or S4 resume or PCI reset, ATS regs aren't restored correctly.
This patch enables ATS at the device state restore if PCI device has ATS
capability.

Signed-off-by: Xudong Hao <xudong.hao@intel.com>
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06 12:11:18 -08:00
Jan Kiszka a2e27787f8 PCI: Introduce INTx check & mask API
These new PCI services allow to probe for 2.3-compliant INTx masking
support and then use the feature from PCI interrupt handlers. The
services are properly synchronized with concurrent config space access
via sysfs or on device reset.

This enables generic PCI device drivers like uio_pci_generic or KVM's
device assignment to implement the necessary kernel-side IRQ handling
without any knowledge about device-specific interrupt status and control
registers.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2012-01-06 12:10:34 -08:00
Ram Pai 0a2daa1cf3 PCI: make cardbus-bridge resources optional
Allocate resources to cardbus bridge only after all other genuine
resources requests are satisfied. Dont retry if resource allocation
for cardbus-bridges fail.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-08-01 11:50:40 -07:00
Linus Torvalds 6d16d6d9bb Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  iommu/core: Fix build with INTR_REMAP=y && CONFIG_DMAR=n
  iommu/amd: Don't use MSI address range for DMA addresses
  iommu/amd: Move missing parts to drivers/iommu
  iommu: Move iommu Kconfig entries to submenu
  x86/ia64: intel-iommu: move to drivers/iommu/
  x86: amd_iommu: move to drivers/iommu/
  msm: iommu: move to drivers/iommu/
  drivers: iommu: move to a dedicated folder
  x86/amd-iommu: Store device alias as dev_data pointer
  x86/amd-iommu: Search for existind dev_data before allocting a new one
  x86/amd-iommu: Allow dev_data->alias to be NULL
  x86/amd-iommu: Use only dev_data in low-level domain attach/detach functions
  x86/amd-iommu: Use only dev_data for dte and iotlb flushing routines
  x86/amd-iommu: Store ATS state in dev_data
  x86/amd-iommu: Store devid in dev_data
  x86/amd-iommu: Introduce global dev_data_list
  x86/amd-iommu: Remove redundant device_flush_dte() calls
  iommu-api: Add missing header file

Fix up trivial conflicts (independent additions close to each other) in
drivers/Makefile and include/linux/pci.h
2011-07-22 16:39:42 -07:00
Ram Pai f483d3923d PCI: conditional resource-reallocation through kernel parameter pci=realloc
Multiple attempts to dynamically reallocate pci resources have
unfortunately lead to regressions. Though we continue to fix the
regressions and fine tune the dynamic-reallocation behavior, we have not
reached a acceptable state yet.
    
This patch provides a interim solution. It disables dynamic reallocation
by default, but adds the ability to enable it through pci=realloc kernel
command line parameter.
    
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-07-08 15:49:20 -07:00
Ohad Ben-Cohen 166e9278a3 x86/ia64: intel-iommu: move to drivers/iommu/
This should ease finding similarities with different platforms,
with the intention of solving problems once in a generic framework
which everyone can use.

Note: to move intel-iommu.c, the declaration of pci_find_upstream_pcie_bridge()
has to move from drivers/pci/pci.h to include/linux/pci.h. This is handled
in this patch, too.

As suggested, also drop DMAR's EXPERIMENTAL tag while we're at it.

Compile-tested on x86_64.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-06-21 10:49:30 +02:00
Linus Torvalds 5e152b4c9e Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (27 commits)
  PCI: Don't use dmi_name_in_vendors in quirk
  PCI: remove unused AER functions
  PCI/sysfs: move bus cpuaffinity to class dev_attrs
  PCI: add rescan to /sys/.../pci_bus/.../
  PCI: update bridge resources to get more big ranges when allocating space (again)
  KVM: Use pci_store/load_saved_state() around VM device usage
  PCI: Add interfaces to store and load the device saved state
  PCI: Track the size of each saved capability data area
  PCI/e1000e: Add and use pci_disable_link_state_locked()
  x86/PCI: derive pcibios_last_bus from ACPI MCFG
  PCI: add latency tolerance reporting enable/disable support
  PCI: add OBFF enable/disable support
  PCI: add ID-based ordering enable/disable support
  PCI hotplug: acpiphp: assume device is in state D0 after powering on a slot.
  PCI: Set PCIE maxpayload for card during hotplug insertion
  PCI/ACPI: Report _OSC control mask returned on failure to get control
  x86/PCI: irq and pci_ids patch for Intel Panther Point DeviceIDs
  PCI: handle positive error codes
  PCI: check pci_vpd_pci22_wait() return
  PCI: Use ICH6_GPIO_EN in ich6_lpc_acpi_gpio
  ...

Fix up trivial conflicts in include/linux/pci_ids.h: commit a6e5e2be44
moved the intel SMBUS ID definitons to the i2c-i801.c driver.
2011-05-23 15:39:34 -07:00
Yinghai Lu dc2c2c9dd5 PCI/sysfs: move bus cpuaffinity to class dev_attrs
Requested by Greg KH to fix a race condition in the creating of PCI bus
cpuaffinity files.

Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-05-21 12:17:13 -07:00
Yinghai Lu b9d320fcb6 PCI: add rescan to /sys/.../pci_bus/.../
After remove the device from /sys, we have to rescan all or
find out the bridge and access /sys../device/rescan there.

this patch add /sys/.../pci_bus/.../rescan. So user can rescan more easy.
that is more clean and easy to understand.

like after remove 0000:c4:00.0, you can rescan 0000:c4 directly.

-v2: According to Jesse, use function instead of exposing attr, so could hide
	#ifdef in header file.
     also add code to remove rescan file in remove path.
-v3: GregKH pointed out that we should use dev_attrs to avoid racing.
     So add pcibus_attrs and make it to be member of pcibus_attrs.
-v4: Change name to pcibus_dev_attrs according to GregKH

Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-05-21 12:17:12 -07:00
Joerg Roedel 5cdede2408 PCI: Move ATS declarations in seperate header file
This patch moves the relevant declarations from the local
header file in drivers/pci to a more accessible locations so
that it can be used by the AMD IOMMU driver too.
The file is named pci-ats.h because support for the PCI PRI
capability will also be added there in a later patch-set.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-04-11 09:01:41 +02:00
Narendra_K@Dell.com 6058989bad PCI: Export ACPI _DSM provided firmware instance number and string name to sysfs
This patch exports ACPI _DSM (Device Specific Method) provided firmware
instance number and string name of PCI devices as defined by 'PCI
Firmware Specification Revision 3.1' section 4.6.7.( DSM for Naming a
PCI or PCI Express Device Under Operating Systems) to sysfs.

New files created are:
  /sys/bus/pci/devices/.../label which contains the firmware name for
the device in question, and
  /sys/bus/pci/devices/.../acpi_index which contains the firmware device type
instance for the given device.

cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/acpi_index
1
cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/label
Embedded Broadcom 5709C NIC 1

cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.1/acpi_index
2
cat /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.1/label
Embedded Broadcom 5709C NIC 2

The ACPI _DSM provided firmware 'instance number' and 'string name' will
be given priority if the firmware also provides 'SMBIOS type 41 device
type instance and string'.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Jordan Hargrave <jordan_hargrave@dell.com>
Signed-off-by: Narendra K <narendra_k@dell.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-03-04 10:41:56 -08:00
Rafael J. Wysocki b6e335aeeb PCI/PM: Use pm_wakeup_event() directly for reporting wakeup events
After recent changes related to wakeup events pm_wakeup_event()
automatically checks if the given device is configured to signal wakeup,
so pci_wakeup_event() may be a static inline function calling
pm_wakeup_event() directly.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-01-14 08:55:43 -08:00
Rafael J. Wysocki 415e12b237 PCI/ACPI: Request _OSC control once for each root bridge (v3)
Move the evaluation of acpi_pci_osc_control_set() (to request control of
PCI Express native features) into acpi_pci_root_add() to avoid calling
it many times for the same root complex with the same arguments.
Additionally, check if all of the requisite _OSC support bits are set
before calling acpi_pci_osc_control_set() for a given root complex.

References: https://bugzilla.kernel.org/show_bug.cgi?id=20232
Reported-by: Ozan Caglayan <ozan@pardus.org.tr>
Tested-by: Ozan Caglayan <ozan@pardus.org.tr>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-01-14 08:55:41 -08:00
Martin Wilck 3b519e4ea6 PCI: fix size checks for mmap() on /proc/bus/pci files
The checks for valid mmaps of PCI resources made through /proc/bus/pci files
that were introduced in 9eff02e204 have several
problems:

1. mmap() calls on /proc/bus/pci files are made with real file offsets > 0,
whereas under /sys/bus/pci/devices, the start of the resource corresponds
to offset 0. This may lead to false negatives in pci_mmap_fits(), which
implicitly assumes the /sys/bus/pci/devices layout.

2. The loop in proc_bus_pci_mmap doesn't skip empty resouces. This leads
to false positives, because pci_mmap_fits() doesn't treat empty resources
correctly (the calculated size is 1 << (8*sizeof(resource_size_t)-PAGE_SHIFT)
in this case!).

3. If a user maps resources with BAR > 0, pci_mmap_fits will emit bogus
WARNINGS for the first resources that don't fit until the correct one is found.

On many controllers the first 2-4 BARs are used, and the others are empty.
In this case, an mmap attempt will first fail on the non-empty BARs
(including the "right" BAR because of 1.) and emit bogus WARNINGS because
of 3., and finally succeed on the first empty BAR because of 2.
This is certainly not the intended behaviour.

This patch addresses all 3 issues.
Updated with an enum type for the additional parameter for pci_mmap_fits().

Cc: stable@kernel.org
Signed-off-by: Martin Wilck <martin.wilck@ts.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-11-11 09:34:32 -08:00
Matthew Garrett bf4d290869 PCI: Export some PCI PM functionality
It's helpful to have some extra PCI power management functions available to
platform code, so move the declarations to an exported header.

Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-10-17 20:03:06 -07:00
Cam Macdonell 0e52247a2e PCI: fix pci_resource_alignment prototype
This fixes the prototype for both pci_resource_alignment() and
pci_sriov_resource_alignment().

Patch started as debugging effort from Cam Macdonell.

Cc: Cam Macdonell <cam@cs.ualberta.ca>
Cc: Avi Kivity <avi@redhat.com>
[chrisw: add iov bits]
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-09-09 13:41:25 -07:00
Rafael J. Wysocki f1a7bfaf6b PCI: PCIe AER: Introduce pci_aer_available()
Introduce a function allowing the caller to check whether to try to
enable PCIe AER.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-24 13:43:08 -07:00
Linus Torvalds 1cfd2bda8c Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (30 commits)
  PCI: update for owner removal from struct device_attribute
  PCI: Fix warnings when CONFIG_DMI unset
  PCI: Do not run NVidia quirks related to MSI with MSI disabled
  x86/PCI: use for_each_pci_dev()
  PCI: use for_each_pci_dev()
  PCI: MSI: Restore read_msi_msg_desc(); add get_cached_msi_msg_desc()
  PCI: export SMBIOS provided firmware instance and label to sysfs
  PCI: Allow read/write access to sysfs I/O port resources
  x86/PCI: use host bridge _CRS info on ASRock ALiveSATA2-GLAN
  PCI: remove unused HAVE_ARCH_PCI_SET_DMA_MAX_SEGMENT_{SIZE|BOUNDARY}
  PCI: disable mmio during bar sizing
  PCI: MSI: Remove unsafe and unnecessary hardware access
  PCI: Default PCIe ASPM control to on and require !EMBEDDED to disable
  PCI: kernel oops on access to pci proc file while hot-removal
  PCI: pci-sysfs: remove casts from void*
  ACPI: Disable ASPM if the platform won't provide _OSC control for PCIe
  PCI hotplug: make sure child bridges are enabled at hotplug time
  PCI hotplug: shpchp: Removed check for hotplug of display devices
  PCI hotplug: pciehp: Fixed return value sign for pciehp_unconfigure_device
  PCI: Don't enable aspm before drivers have had a chance to veto it
  ...
2010-08-06 11:44:36 -07:00