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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: (88 commits)
  PCI: fix HT MSI mapping fix
  PCI: don't enable too much HT MSI mapping
  x86/PCI: make pci=lastbus=255 work when acpi is on
  PCI: save and restore PCIe 2.0 registers
  PCI: update fakephp for bus_id removal
  PCI: fix kernel oops on bridge removal
  PCI: fix conflict between SR-IOV and config space sizing
  powerpc/PCI: include pci.h in powerpc MSI implementation
  PCI Hotplug: schedule fakephp for feature removal
  PCI Hotplug: rename legacy_fakephp to fakephp
  PCI Hotplug: restore fakephp interface with complete reimplementation
  PCI: Introduce /sys/bus/pci/devices/.../rescan
  PCI: Introduce /sys/bus/pci/devices/.../remove
  PCI: Introduce /sys/bus/pci/rescan
  PCI: Introduce pci_rescan_bus()
  PCI: do not enable bridges more than once
  PCI: do not initialize bridges more than once
  PCI: always scan child buses
  PCI: pci_scan_slot() returns newly found devices
  PCI: don't scan existing devices
  ...

Fix trivial append-only conflict in Documentation/feature-removal-schedule.txt
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Linus Torvalds 2009-04-01 09:47:12 -07:00
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Коммит e76e5b2c66
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70
Documentation/ABI/testing/sysfs-bus-pci
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@ -41,6 +41,49 @@ Description:
for the device and attempt to bind to it. For example:
# echo "8086 10f5" > /sys/bus/pci/drivers/foo/new_id
What: /sys/bus/pci/drivers/.../remove_id
Date: February 2009
Contact: Chris Wright <chrisw@sous-sol.org>
Description:
Writing a device ID to this file will remove an ID
that was dynamically added via the new_id sysfs entry.
The format for the device ID is:
VVVV DDDD SVVV SDDD CCCC MMMM. That is Vendor ID, Device
ID, Subsystem Vendor ID, Subsystem Device ID, Class,
and Class Mask. The Vendor ID and Device ID fields are
required, the rest are optional. After successfully
removing an ID, the driver will no longer support the
device. This is useful to ensure auto probing won't
match the driver to the device. For example:
# echo "8086 10f5" > /sys/bus/pci/drivers/foo/remove_id
What: /sys/bus/pci/rescan
Date: January 2009
Contact: Linux PCI developers <linux-pci@vger.kernel.org>
Description:
Writing a non-zero value to this attribute will
force a rescan of all PCI buses in the system, and
re-discover previously removed devices.
Depends on CONFIG_HOTPLUG.
What: /sys/bus/pci/devices/.../remove
Date: January 2009
Contact: Linux PCI developers <linux-pci@vger.kernel.org>
Description:
Writing a non-zero value to this attribute will
hot-remove the PCI device and any of its children.
Depends on CONFIG_HOTPLUG.
What: /sys/bus/pci/devices/.../rescan
Date: January 2009
Contact: Linux PCI developers <linux-pci@vger.kernel.org>
Description:
Writing a non-zero value to this attribute will
force a rescan of the device's parent bus and all
child buses, and re-discover devices removed earlier
from this part of the device tree.
Depends on CONFIG_HOTPLUG.
What: /sys/bus/pci/devices/.../vpd
Date: February 2008
Contact: Ben Hutchings <bhutchings@solarflare.com>
@ -52,3 +95,30 @@ Description:
that some devices may have malformatted data. If the
underlying VPD has a writable section then the
corresponding section of this file will be writable.
What: /sys/bus/pci/devices/.../virtfnN
Date: March 2009
Contact: Yu Zhao <yu.zhao@intel.com>
Description:
This symbolic link appears when hardware supports the SR-IOV
capability and the Physical Function driver has enabled it.
The symbolic link points to the PCI device sysfs entry of the
Virtual Function whose index is N (0...MaxVFs-1).
What: /sys/bus/pci/devices/.../dep_link
Date: March 2009
Contact: Yu Zhao <yu.zhao@intel.com>
Description:
This symbolic link appears when hardware supports the SR-IOV
capability and the Physical Function driver has enabled it,
and this device has vendor specific dependencies with others.
The symbolic link points to the PCI device sysfs entry of
Physical Function this device depends on.
What: /sys/bus/pci/devices/.../physfn
Date: March 2009
Contact: Yu Zhao <yu.zhao@intel.com>
Description:
This symbolic link appears when a device is a Virtual Function.
The symbolic link points to the PCI device sysfs entry of the
Physical Function this device associates with.

1
Documentation/DocBook/kernel-api.tmpl
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@ -199,6 +199,7 @@ X!Edrivers/pci/hotplug.c
-->
!Edrivers/pci/probe.c
!Edrivers/pci/rom.c
!Edrivers/pci/iov.c
</sect1>
<sect1><title>PCI Hotplug Support Library</title>
!Edrivers/pci/hotplug/pci_hotplug_core.c

702
Documentation/PCI/MSI-HOWTO.txt
Просмотреть файл

@ -4,506 +4,356 @@
Revised Feb 12, 2004 by Martine Silbermann
email: Martine.Silbermann@hp.com
Revised Jun 25, 2004 by Tom L Nguyen
Revised Jul 9, 2008 by Matthew Wilcox <willy@linux.intel.com>
Copyright 2003, 2008 Intel Corporation
1. About this guide
This guide describes the basics of Message Signaled Interrupts (MSI),
the advantages of using MSI over traditional interrupt mechanisms,
and how to enable your driver to use MSI or MSI-X. Also included is
a Frequently Asked Questions (FAQ) section.
This guide describes the basics of Message Signaled Interrupts (MSIs),
the advantages of using MSI over traditional interrupt mechanisms, how
to change your driver to use MSI or MSI-X and some basic diagnostics to
try if a device doesn't support MSIs.
1.1 Terminology
PCI devices can be single-function or multi-function. In either case,
when this text talks about enabling or disabling MSI on a "device
function," it is referring to one specific PCI device and function and
not to all functions on a PCI device (unless the PCI device has only
one function).
2. What are MSIs?
2. Copyright 2003 Intel Corporation
A Message Signaled Interrupt is a write from the device to a special
address which causes an interrupt to be received by the CPU.
3. What is MSI/MSI-X?
The MSI capability was first specified in PCI 2.2 and was later enhanced
in PCI 3.0 to allow each interrupt to be masked individually. The MSI-X
capability was also introduced with PCI 3.0. It supports more interrupts
per device than MSI and allows interrupts to be independently configured.
Message Signaled Interrupt (MSI), as described in the PCI Local Bus
Specification Revision 2.3 or later, is an optional feature, and a
required feature for PCI Express devices. MSI enables a device function
to request service by sending an Inbound Memory Write on its PCI bus to
the FSB as a Message Signal Interrupt transaction. Because MSI is
generated in the form of a Memory Write, all transaction conditions,
such as a Retry, Master-Abort, Target-Abort or normal completion, are
supported.
Devices may support both MSI and MSI-X, but only one can be enabled at
a time.
A PCI device that supports MSI must also support pin IRQ assertion
interrupt mechanism to provide backward compatibility for systems that
do not support MSI. In systems which support MSI, the bus driver is
responsible for initializing the message address and message data of
the device function's MSI/MSI-X capability structure during device
initial configuration.
An MSI capable device function indicates MSI support by implementing
the MSI/MSI-X capability structure in its PCI capability list. The
device function may implement both the MSI capability structure and
the MSI-X capability structure; however, the bus driver should not
enable both.
3. Why use MSIs?
The MSI capability structure contains Message Control register,
Message Address register and Message Data register. These registers
provide the bus driver control over MSI. The Message Control register
indicates the MSI capability supported by the device. The Message
Address register specifies the target address and the Message Data
register specifies the characteristics of the message. To request
service, the device function writes the content of the Message Data
register to the target address. The device and its software driver
are prohibited from writing to these registers.
There are three reasons why using MSIs can give an advantage over
traditional pin-based interrupts.
The MSI-X capability structure is an optional extension to MSI. It
uses an independent and separate capability structure. There are
some key advantages to implementing the MSI-X capability structure
over the MSI capability structure as described below.
Pin-based PCI interrupts are often shared amongst several devices.
To support this, the kernel must call each interrupt handler associated
with an interrupt, which leads to reduced performance for the system as
a whole. MSIs are never shared, so this problem cannot arise.
- Support a larger maximum number of vectors per function.
When a device writes data to memory, then raises a pin-based interrupt,
it is possible that the interrupt may arrive before all the data has
arrived in memory (this becomes more likely with devices behind PCI-PCI
bridges). In order to ensure that all the data has arrived in memory,
the interrupt handler must read a register on the device which raised
the interrupt. PCI transaction ordering rules require that all the data
arrives in memory before the value can be returned from the register.
Using MSIs avoids this problem as the interrupt-generating write cannot
pass the data writes, so by the time the interrupt is raised, the driver
knows that all the data has arrived in memory.
- Provide the ability for system software to configure
each vector with an independent message address and message
data, specified by a table that resides in Memory Space.
PCI devices can only support a single pin-based interrupt per function.
Often drivers have to query the device to find out what event has
occurred, slowing down interrupt handling for the common case. With
MSIs, a device can support more interrupts, allowing each interrupt
to be specialised to a different purpose. One possible design gives
infrequent conditions (such as errors) their own interrupt which allows
the driver to handle the normal interrupt handling path more efficiently.
Other possible designs include giving one interrupt to each packet queue
in a network card or each port in a storage controller.
- MSI and MSI-X both support per-vector masking. Per-vector
masking is an optional extension of MSI but a required
feature for MSI-X. Per-vector masking provides the kernel the
ability to mask/unmask a single MSI while running its
interrupt service routine. If per-vector masking is
not supported, then the device driver should provide the
hardware/software synchronization to ensure that the device
generates MSI when the driver wants it to do so.
4. Why use MSI?
4. How to use MSIs
As a benefit to the simplification of board design, MSI allows board
designers to remove out-of-band interrupt routing. MSI is another
step towards a legacy-free environment.
PCI devices are initialised to use pin-based interrupts. The device
driver has to set up the device to use MSI or MSI-X. Not all machines
support MSIs correctly, and for those machines, the APIs described below
will simply fail and the device will continue to use pin-based interrupts.
Due to increasing pressure on chipset and processor packages to
reduce pin count, the need for interrupt pins is expected to
diminish over time. Devices, due to pin constraints, may implement
messages to increase performance.
4.1 Include kernel support for MSIs
PCI Express endpoints uses INTx emulation (in-band messages) instead
of IRQ pin assertion. Using INTx emulation requires interrupt
sharing among devices connected to the same node (PCI bridge) while
MSI is unique (non-shared) and does not require BIOS configuration
support. As a result, the PCI Express technology requires MSI
support for better interrupt performance.
To support MSI or MSI-X, the kernel must be built with the CONFIG_PCI_MSI
option enabled. This option is only available on some architectures,
and it may depend on some other options also being set. For example,
on x86, you must also enable X86_UP_APIC or SMP in order to see the
CONFIG_PCI_MSI option.
Using MSI enables the device functions to support two or more
vectors, which can be configured to target different CPUs to
increase scalability.
4.2 Using MSI
5. Configuring a driver to use MSI/MSI-X
Most of the hard work is done for the driver in the PCI layer. It simply
has to request that the PCI layer set up the MSI capability for this
device.
By default, the kernel will not enable MSI/MSI-X on all devices that
support this capability. The CONFIG_PCI_MSI kernel option
must be selected to enable MSI/MSI-X support.
5.1 Including MSI/MSI-X support into the kernel
To allow MSI/MSI-X capable device drivers to selectively enable
MSI/MSI-X (using pci_enable_msi()/pci_enable_msix() as described
below), the VECTOR based scheme needs to be enabled by setting
CONFIG_PCI_MSI during kernel config.
Since the target of the inbound message is the local APIC, providing
CONFIG_X86_LOCAL_APIC must be enabled as well as CONFIG_PCI_MSI.
5.2 Configuring for MSI support
Due to the non-contiguous fashion in vector assignment of the
existing Linux kernel, this version does not support multiple
messages regardless of a device function is capable of supporting
more than one vector. To enable MSI on a device function's MSI
capability structure requires a device driver to call the function
pci_enable_msi() explicitly.
5.2.1 API pci_enable_msi
4.2.1 pci_enable_msi
int pci_enable_msi(struct pci_dev *dev)
With this new API, a device driver that wants to have MSI
enabled on its device function must call this API to enable MSI.
A successful call will initialize the MSI capability structure
with ONE vector, regardless of whether a device function is
capable of supporting multiple messages. This vector replaces the
pre-assigned dev->irq with a new MSI vector. To avoid a conflict
of the new assigned vector with existing pre-assigned vector requires
a device driver to call this API before calling request_irq().
A successful call will allocate ONE interrupt to the device, regardless
of how many MSIs the device supports. The device will be switched from
pin-based interrupt mode to MSI mode. The dev->irq number is changed
to a new number which represents the message signaled interrupt.
This function should be called before the driver calls request_irq()
since enabling MSIs disables the pin-based IRQ and the driver will not
receive interrupts on the old interrupt.
5.2.2 API pci_disable_msi
4.2.2 pci_enable_msi_block
int pci_enable_msi_block(struct pci_dev *dev, int count)
This variation on the above call allows a device driver to request multiple
MSIs. The MSI specification only allows interrupts to be allocated in
powers of two, up to a maximum of 2^5 (32).
If this function returns 0, it has succeeded in allocating at least as many
interrupts as the driver requested (it may have allocated more in order
to satisfy the power-of-two requirement). In this case, the function
enables MSI on this device and updates dev->irq to be the lowest of
the new interrupts assigned to it. The other interrupts assigned to
the device are in the range dev->irq to dev->irq + count - 1.
If this function returns a negative number, it indicates an error and
the driver should not attempt to request any more MSI interrupts for
this device. If this function returns a positive number, it will be
less than 'count' and indicate the number of interrupts that could have
been allocated. In neither case will the irq value have been
updated, nor will the device have been switched into MSI mode.
The device driver must decide what action to take if
pci_enable_msi_block() returns a value less than the number asked for.
Some devices can make use of fewer interrupts than the maximum they
request; in this case the driver should call pci_enable_msi_block()
again. Note that it is not guaranteed to succeed, even when the
'count' has been reduced to the value returned from a previous call to
pci_enable_msi_block(). This is because there are multiple constraints
on the number of vectors that can be allocated; pci_enable_msi_block()
will return as soon as it finds any constraint that doesn't allow the
call to succeed.
4.2.3 pci_disable_msi
void pci_disable_msi(struct pci_dev *dev)
This API should always be used to undo the effect of pci_enable_msi()
when a device driver is unloading. This API restores dev->irq with
the pre-assigned IOAPIC vector and switches a device's interrupt
mode to PCI pin-irq assertion/INTx emulation mode.
This function should be used to undo the effect of pci_enable_msi() or
pci_enable_msi_block(). Calling it restores dev->irq to the pin-based
interrupt number and frees the previously allocated message signaled
interrupt(s). The interrupt may subsequently be assigned to another
device, so drivers should not cache the value of dev->irq.
Note that a device driver should always call free_irq() on the MSI vector
that it has done request_irq() on before calling this API. Failure to do
so results in a BUG_ON() and a device will be left with MSI enabled and
leaks its vector.
A device driver must always call free_irq() on the interrupt(s)
for which it has called request_irq() before calling this function.
Failure to do so will result in a BUG_ON(), the device will be left with
MSI enabled and will leak its vector.
5.2.3 MSI mode vs. legacy mode diagram
4.3 Using MSI-X
The below diagram shows the events which switch the interrupt
mode on the MSI-capable device function between MSI mode and
PIN-IRQ assertion mode.
------------ pci_enable_msi ------------------------
| | <=============== | |
| MSI MODE | | PIN-IRQ ASSERTION MODE |
| | ===============> | |
------------ pci_disable_msi ------------------------
Figure 1. MSI Mode vs. Legacy Mode
In Figure 1, a device operates by default in legacy mode. Legacy
in this context means PCI pin-irq assertion or PCI-Express INTx
emulation. A successful MSI request (using pci_enable_msi()) switches
a device's interrupt mode to MSI mode. A pre-assigned IOAPIC vector
stored in dev->irq will be saved by the PCI subsystem and a new
assigned MSI vector will replace dev->irq.
To return back to its default mode, a device driver should always call
pci_disable_msi() to undo the effect of pci_enable_msi(). Note that a
device driver should always call free_irq() on the MSI vector it has
done request_irq() on before calling pci_disable_msi(). Failure to do
so results in a BUG_ON() and a device will be left with MSI enabled and
leaks its vector. Otherwise, the PCI subsystem restores a device's
dev->irq with a pre-assigned IOAPIC vector and marks the released
MSI vector as unused.
Once being marked as unused, there is no guarantee that the PCI
subsystem will reserve this MSI vector for a device. Depending on
the availability of current PCI vector resources and the number of
MSI/MSI-X requests from other drivers, this MSI may be re-assigned.
For the case where the PCI subsystem re-assigns this MSI vector to
another driver, a request to switch back to MSI mode may result
in being assigned a different MSI vector or a failure if no more
vectors are available.
5.3 Configuring for MSI-X support
Due to the ability of the system software to configure each vector of
the MSI-X capability structure with an independent message address
and message data, the non-contiguous fashion in vector assignment of
the existing Linux kernel has no impact on supporting multiple
messages on an MSI-X capable device functions. To enable MSI-X on
a device function's MSI-X capability structure requires its device
driver to call the function pci_enable_msix() explicitly.
The function pci_enable_msix(), once invoked, enables either
all or nothing, depending on the current availability of PCI vector
resources. If the PCI vector resources are available for the number
of vectors requested by a device driver, this function will configure
the MSI-X table of the MSI-X capability structure of a device with
requested messages. To emphasize this reason, for example, a device
may be capable for supporting the maximum of 32 vectors while its
software driver usually may request 4 vectors. It is recommended
that the device driver should call this function once during the
initialization phase of the device driver.
Unlike the function pci_enable_msi(), the function pci_enable_msix()
does not replace the pre-assigned IOAPIC dev->irq with a new MSI
vector because the PCI subsystem writes the 1:1 vector-to-entry mapping
into the field vector of each element contained in a second argument.
Note that the pre-assigned IOAPIC dev->irq is valid only if the device
operates in PIN-IRQ assertion mode. In MSI-X mode, any attempt at
using dev->irq by the device driver to request for interrupt service
may result in unpredictable behavior.
For each MSI-X vector granted, a device driver is responsible for calling
other functions like request_irq(), enable_irq(), etc. to enable
this vector with its corresponding interrupt service handler. It is
a device driver's choice to assign all vectors with the same
interrupt service handler or each vector with a unique interrupt
service handler.
5.3.1 Handling MMIO address space of MSI-X Table
The PCI 3.0 specification has implementation notes that MMIO address
space for a device's MSI-X structure should be isolated so that the
software system can set different pages for controlling accesses to the
MSI-X structure. The implementation of MSI support requires the PCI
subsystem, not a device driver, to maintain full control of the MSI-X
table/MSI-X PBA (Pending Bit Array) and MMIO address space of the MSI-X
table/MSI-X PBA. A device driver should not access the MMIO address
space of the MSI-X table/MSI-X PBA.
5.3.2 API pci_enable_msix
int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec)
This API enables a device driver to request the PCI subsystem
to enable MSI-X messages on its hardware device. Depending on
the availability of PCI vectors resources, the PCI subsystem enables
either all or none of the requested vectors.
Argument 'dev' points to the device (pci_dev) structure.
Argument 'entries' is a pointer to an array of msix_entry structs.
The number of entries is indicated in argument 'nvec'.
struct msix_entry is defined in /driver/pci/msi.h:
The MSI-X capability is much more flexible than the MSI capability.
It supports up to 2048 interrupts, each of which can be controlled
independently. To support this flexibility, drivers must use an array of
`struct msix_entry':
struct msix_entry {
u16 vector; /* kernel uses to write alloc vector */
u16 entry; /* driver uses to specify entry */
};
A device driver is responsible for initializing the field 'entry' of
each element with a unique entry supported by MSI-X table. Otherwise,
-EINVAL will be returned as a result. A successful return of zero
indicates the PCI subsystem completed initializing each of the requested
entries of the MSI-X table with message address and message data.
Last but not least, the PCI subsystem will write the 1:1
vector-to-entry mapping into the field 'vector' of each element. A
device driver is responsible for keeping track of allocated MSI-X
vectors in its internal data structure.
This allows for the device to use these interrupts in a sparse fashion;
for example it could use interrupts 3 and 1027 and allocate only a
two-element array. The driver is expected to fill in the 'entry' value
in each element of the array to indicate which entries it wants the kernel
to assign interrupts for. It is invalid to fill in two entries with the
same number.
A return of zero indicates that the number of MSI-X vectors was
successfully allocated. A return of greater than zero indicates
MSI-X vector shortage. Or a return of less than zero indicates
a failure. This failure may be a result of duplicate entries
specified in second argument, or a result of no available vector,
or a result of failing to initialize MSI-X table entries.
4.3.1 pci_enable_msix
5.3.3 API pci_disable_msix
int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec)
Calling this function asks the PCI subsystem to allocate 'nvec' MSIs.
The 'entries' argument is a pointer to an array of msix_entry structs
which should be at least 'nvec' entries in size. On success, the
function will return 0 and the device will have been switched into
MSI-X interrupt mode. The 'vector' elements in each entry will have
been filled in with the interrupt number. The driver should then call
request_irq() for each 'vector' that it decides to use.
If this function returns a negative number, it indicates an error and
the driver should not attempt to allocate any more MSI-X interrupts for
this device. If it returns a positive number, it indicates the maximum
number of interrupt vectors that could have been allocated. See example
below.
This function, in contrast with pci_enable_msi(), does not adjust
dev->irq. The device will not generate interrupts for this interrupt
number once MSI-X is enabled. The device driver is responsible for
keeping track of the interrupts assigned to the MSI-X vectors so it can
free them again later.
Device drivers should normally call this function once per device
during the initialization phase.
It is ideal if drivers can cope with a variable number of MSI-X interrupts,
there are many reasons why the platform may not be able to provide the
exact number a driver asks for.
A request loop to achieve that might look like:
static int foo_driver_enable_msix(struct foo_adapter *adapter, int nvec)
{
while (nvec >= FOO_DRIVER_MINIMUM_NVEC) {
rc = pci_enable_msix(adapter->pdev,
adapter->msix_entries, nvec);
if (rc > 0)
nvec = rc;
else
return rc;
}
return -ENOSPC;
}
4.3.2 pci_disable_msix
void pci_disable_msix(struct pci_dev *dev)
This API should always be used to undo the effect of pci_enable_msix()
when a device driver is unloading. Note that a device driver should
always call free_irq() on all MSI-X vectors it has done request_irq()
on before calling this API. Failure to do so results in a BUG_ON() and
a device will be left with MSI-X enabled and leaks its vectors.
This API should be used to undo the effect of pci_enable_msix(). It frees
the previously allocated message signaled interrupts. The interrupts may
subsequently be assigned to another device, so drivers should not cache
the value of the 'vector' elements over a call to pci_disable_msix().
5.3.4 MSI-X mode vs. legacy mode diagram
A device driver must always call free_irq() on the interrupt(s)
for which it has called request_irq() before calling this function.
Failure to do so will result in a BUG_ON(), the device will be left with
MSI enabled and will leak its vector.
The below diagram shows the events which switch the interrupt
mode on the MSI-X capable device function between MSI-X mode and
PIN-IRQ assertion mode (legacy).
4.3.3 The MSI-X Table
------------ pci_enable_msix(,,n) ------------------------
| | <=============== | |
| MSI-X MODE | | PIN-IRQ ASSERTION MODE |
| | ===============> | |
------------ pci_disable_msix ------------------------
The MSI-X capability specifies a BAR and offset within that BAR for the
MSI-X Table. This address is mapped by the PCI subsystem, and should not
be accessed directly by the device driver. If the driver wishes to
mask or unmask an interrupt, it should call disable_irq() / enable_irq().
Figure 2. MSI-X Mode vs. Legacy Mode
4.4 Handling devices implementing both MSI and MSI-X capabilities
In Figure 2, a device operates by default in legacy mode. A
successful MSI-X request (using pci_enable_msix()) switches a
device's interrupt mode to MSI-X mode. A pre-assigned IOAPIC vector
stored in dev->irq will be saved by the PCI subsystem; however,
unlike MSI mode, the PCI subsystem will not replace dev->irq with
assigned MSI-X vector because the PCI subsystem already writes the 1:1
vector-to-entry mapping into the field 'vector' of each element
specified in second argument.
If a device implements both MSI and MSI-X capabilities, it can
run in either MSI mode or MSI-X mode but not both simultaneously.
This is a requirement of the PCI spec, and it is enforced by the
PCI layer. Calling pci_enable_msi() when MSI-X is already enabled or
pci_enable_msix() when MSI is already enabled will result in an error.
If a device driver wishes to switch between MSI and MSI-X at runtime,
it must first quiesce the device, then switch it back to pin-interrupt
mode, before calling pci_enable_msi() or pci_enable_msix() and resuming
operation. This is not expected to be a common operation but may be
useful for debugging or testing during development.
To return back to its default mode, a device driver should always call
pci_disable_msix() to undo the effect of pci_enable_msix(). Note that
a device driver should always call free_irq() on all MSI-X vectors it
has done request_irq() on before calling pci_disable_msix(). Failure
to do so results in a BUG_ON() and a device will be left with MSI-X
enabled and leaks its vectors. Otherwise, the PCI subsystem switches a
device function's interrupt mode from MSI-X mode to legacy mode and
marks all allocated MSI-X vectors as unused.
4.5 Considerations when using MSIs
Once being marked as unused, there is no guarantee that the PCI
subsystem will reserve these MSI-X vectors for a device. Depending on
the availability of current PCI vector resources and the number of
MSI/MSI-X requests from other drivers, these MSI-X vectors may be
re-assigned.
4.5.1 Choosing between MSI-X and MSI
For the case where the PCI subsystem re-assigned these MSI-X vectors
to other drivers, a request to switch back to MSI-X mode may result
being assigned with another set of MSI-X vectors or a failure if no
more vectors are available.
If your device supports both MSI-X and MSI capabilities, you should use
the MSI-X facilities in preference to the MSI facilities. As mentioned
above, MSI-X supports any number of interrupts between 1 and 2048.
In constrast, MSI is restricted to a maximum of 32 interrupts (and
must be a power of two). In addition, the MSI interrupt vectors must
be allocated consecutively, so the system may not be able to allocate
as many vectors for MSI as it could for MSI-X. On some platforms, MSI
interrupts must all be targetted at the same set of CPUs whereas MSI-X
interrupts can all be targetted at different CPUs.
5.4 Handling function implementing both MSI and MSI-X capabilities
4.5.2 Spinlocks
For the case where a function implements both MSI and MSI-X
capabilities, the PCI subsystem enables a device to run either in MSI
mode or MSI-X mode but not both. A device driver determines whether it
wants MSI or MSI-X enabled on its hardware device. Once a device
driver requests for MSI, for example, it is prohibited from requesting
MSI-X; in other words, a device driver is not permitted to ping-pong
between MSI mod MSI-X mode during a run-time.
Most device drivers have a per-device spinlock which is taken in the
interrupt handler. With pin-based interrupts or a single MSI, it is not
necessary to disable interrupts (Linux guarantees the same interrupt will
not be re-entered). If a device uses multiple interrupts, the driver
must disable interrupts while the lock is held. If the device sends
a different interrupt, the driver will deadlock trying to recursively
acquire the spinlock.
5.5 Hardware requirements for MSI/MSI-X support
There are two solutions. The first is to take the lock with
spin_lock_irqsave() or spin_lock_irq() (see
Documentation/DocBook/kernel-locking). The second is to specify
IRQF_DISABLED to request_irq() so that the kernel runs the entire
interrupt routine with interrupts disabled.
MSI/MSI-X support requires support from both system hardware and
individual hardware device functions.
If your MSI interrupt routine does not hold the lock for the whole time
it is running, the first solution may be best. The second solution is
normally preferred as it avoids making two transitions from interrupt
disabled to enabled and back again.
5.5.1 Required x86 hardware support
4.6 How to tell whether MSI/MSI-X is enabled on a device
Since the target of MSI address is the local APIC CPU, enabling
MSI/MSI-X support in the Linux kernel is dependent on whether existing
system hardware supports local APIC. Users should verify that their
system supports local APIC operation by testing that it runs when
CONFIG_X86_LOCAL_APIC=y.
Using 'lspci -v' (as root) may show some devices with "MSI", "Message
Signalled Interrupts" or "MSI-X" capabilities. Each of these capabilities
has an 'Enable' flag which will be followed with either "+" (enabled)
or "-" (disabled).
In SMP environment, CONFIG_X86_LOCAL_APIC is automatically set;
however, in UP environment, users must manually set
CONFIG_X86_LOCAL_APIC. Once CONFIG_X86_LOCAL_APIC=y, setting
CONFIG_PCI_MSI enables the VECTOR based scheme and the option for
MSI-capable device drivers to selectively enable MSI/MSI-X.
Note that CONFIG_X86_IO_APIC setting is irrelevant because MSI/MSI-X
vector is allocated new during runtime and MSI/MSI-X support does not
depend on BIOS support. This key independency enables MSI/MSI-X
support on future IOxAPIC free platforms.
5. MSI quirks
5.5.2 Device hardware support
Several PCI chipsets or devices are known not to support MSIs.
The PCI stack provides three ways to disable MSIs:
The hardware device function supports MSI by indicating the
MSI/MSI-X capability structure on its PCI capability list. By
default, this capability structure will not be initialized by
the kernel to enable MSI during the system boot. In other words,
the device function is running on its default pin assertion mode.
Note that in many cases the hardware supporting MSI have bugs,
which may result in system hangs. The software driver of specific
MSI-capable hardware is responsible for deciding whether to call
pci_enable_msi or not. A return of zero indicates the kernel
successfully initialized the MSI/MSI-X capability structure of the
device function. The device function is now running on MSI/MSI-X mode.
1. globally
2. on all devices behind a specific bridge
3. on a single device
5.6 How to tell whether MSI/MSI-X is enabled on device function
5.1. Disabling MSIs globally
At the driver level, a return of zero from the function call of
pci_enable_msi()/pci_enable_msix() indicates to a device driver that
its device function is initialized successfully and ready to run in
MSI/MSI-X mode.
Some host chipsets simply don't support MSIs properly. If we're
lucky, the manufacturer knows this and has indicated it in the ACPI
FADT table. In this case, Linux will automatically disable MSIs.
Some boards don't include this information in the table and so we have
to detect them ourselves. The complete list of these is found near the
quirk_disable_all_msi() function in drivers/pci/quirks.c.
At the user level, users can use the command 'cat /proc/interrupts'
to display the vectors allocated for devices and their interrupt
MSI/MSI-X modes ("PCI-MSI"/"PCI-MSI-X"). Below shows MSI mode is
enabled on a SCSI Adaptec 39320D Ultra320 controller.
If you have a board which has problems with MSIs, you can pass pci=nomsi
on the kernel command line to disable MSIs on all devices. It would be
in your best interests to report the problem to linux-pci@vger.kernel.org
including a full 'lspci -v' so we can add the quirks to the kernel.
CPU0 CPU1
0: 324639 0 IO-APIC-edge timer
1: 1186 0 IO-APIC-edge i8042
2: 0 0 XT-PIC cascade
12: 2797 0 IO-APIC-edge i8042
14: 6543 0 IO-APIC-edge ide0
15: 1 0 IO-APIC-edge ide1
169: 0 0 IO-APIC-level uhci-hcd
185: 0 0 IO-APIC-level uhci-hcd
193: 138 10 PCI-MSI aic79xx
201: 30 0 PCI-MSI aic79xx
225: 30 0 IO-APIC-level aic7xxx
233: 30 0 IO-APIC-level aic7xxx
NMI: 0 0
LOC: 324553 325068
ERR: 0
MIS: 0
5.2. Disabling MSIs below a bridge
6. MSI quirks
Some PCI bridges are not able to route MSIs between busses properly.
In this case, MSIs must be disabled on all devices behind the bridge.
Several PCI chipsets or devices are known to not support MSI.
The PCI stack provides 3 possible levels of MSI disabling:
* on a single device
* on all devices behind a specific bridge
* globally
Some bridges allow you to enable MSIs by changing some bits in their
PCI configuration space (especially the Hypertransport chipsets such
as the nVidia nForce and Serverworks HT2000). As with host chipsets,
Linux mostly knows about them and automatically enables MSIs if it can.
If you have a bridge which Linux doesn't yet know about, you can enable
MSIs in configuration space using whatever method you know works, then
enable MSIs on that bridge by doing:
6.1. Disabling MSI on a single device
echo 1 > /sys/bus/pci/devices/$bridge/msi_bus
Under some circumstances it might be required to disable MSI on a
single device. This may be achieved by either not calling pci_enable_msi()
or all, or setting the pci_dev->no_msi flag before (most of the time
in a quirk).
where $bridge is the PCI address of the bridge you've enabled (eg
0000:00:0e.0).
6.2. Disabling MSI below a bridge
To disable MSIs, echo 0 instead of 1. Changing this value should be
done with caution as it can break interrupt handling for all devices
below this bridge.
The vast majority of MSI quirks are required by PCI bridges not
being able to route MSI between busses. In this case, MSI have to be
disabled on all devices behind this bridge. It is achieves by setting
the PCI_BUS_FLAGS_NO_MSI flag in the pci_bus->bus_flags of the bridge
subordinate bus. There is no need to set the same flag on bridges that
are below the broken bridge. When pci_enable_msi() is called to enable
MSI on a device, pci_msi_supported() takes care of checking the NO_MSI
flag in all parent busses of the device.
Again, please notify linux-pci@vger.kernel.org of any bridges that need
special handling.
Some bridges actually support dynamic MSI support enabling/disabling
by changing some bits in their PCI configuration space (especially
the Hypertransport chipsets such as the nVidia nForce and Serverworks
HT2000). It may then be required to update the NO_MSI flag on the
corresponding devices in the sysfs hierarchy. To enable MSI support
on device "0000:00:0e", do:
5.3. Disabling MSIs on a single device
echo 1 > /sys/bus/pci/devices/0000:00:0e/msi_bus
Some devices are known to have faulty MSI implementations. Usually this
is handled in the individual device driver but occasionally it's necessary
to handle this with a quirk. Some drivers have an option to disable use
of MSI. While this is a convenient workaround for the driver author,
it is not good practise, and should not be emulated.
To disable MSI support, echo 0 instead of 1. Note that it should be
used with caution since changing this value might break interrupts.
5.4. Finding why MSIs are disabled on a device
6.3. Disabling MSI globally
From the above three sections, you can see that there are many reasons
why MSIs may not be enabled for a given device. Your first step should
be to examine your dmesg carefully to determine whether MSIs are enabled
for your machine. You should also check your .config to be sure you
have enabled CONFIG_PCI_MSI.
Some extreme cases may require to disable MSI globally on the system.
For now, the only known case is a Serverworks PCI-X chipsets (MSI are
not supported on several busses that are not all connected to the
chipset in the Linux PCI hierarchy). In the vast majority of other
cases, disabling only behind a specific bridge is enough.
Then, 'lspci -t' gives the list of bridges above a device. Reading
/sys/bus/pci/devices/*/msi_bus will tell you whether MSI are enabled (1)
or disabled (0). If 0 is found in any of the msi_bus files belonging
to bridges between the PCI root and the device, MSIs are disabled.
For debugging purpose, the user may also pass pci=nomsi on the kernel
command-line to explicitly disable MSI globally. But, once the appro-
priate quirks are added to the kernel, this option should not be
required anymore.
6.4. Finding why MSI cannot be enabled on a device
Assuming that MSI are not enabled on a device, you should look at
dmesg to find messages that quirks may output when disabling MSI
on some devices, some bridges or even globally.
Then, lspci -t gives the list of bridges above a device. Reading
/sys/bus/pci/devices/0000:00:0e/msi_bus will tell you whether MSI
are enabled (1) or disabled (0). In 0 is found in a single bridge
msi_bus file above the device, MSI cannot be enabled.
7. FAQ
Q1. Are there any limitations on using the MSI?
A1. If the PCI device supports MSI and conforms to the
specification and the platform supports the APIC local bus,
then using MSI should work.
Q2. Will it work on all the Pentium processors (P3, P4, Xeon,
AMD processors)? In P3 IPI's are transmitted on the APIC local
bus and in P4 and Xeon they are transmitted on the system
bus. Are there any implications with this?
A2. MSI support enables a PCI device sending an inbound
memory write (0xfeexxxxx as target address) on its PCI bus
directly to the FSB. Since the message address has a
redirection hint bit cleared, it should work.
Q3. The target address 0xfeexxxxx will be translated by the
Host Bridge into an interrupt message. Are there any
limitations on the chipsets such as Intel 8xx, Intel e7xxx,
or VIA?
A3. If these chipsets support an inbound memory write with
target address set as 0xfeexxxxx, as conformed to PCI
specification 2.3 or latest, then it should work.
Q4. From the driver point of view, if the MSI is lost because
of errors occurring during inbound memory write, then it may
wait forever. Is there a mechanism for it to recover?
A4. Since the target of the transaction is an inbound memory
write, all transaction termination conditions (Retry,
Master-Abort, Target-Abort, or normal completion) are
supported. A device sending an MSI must abide by all the PCI
rules and conditions regarding that inbound memory write. So,
if a retry is signaled it must retry, etc... We believe that
the recommendation for Abort is also a retry (refer to PCI
specification 2.3 or latest).
It is also worth checking the device driver to see whether it supports MSIs.
For example, it may contain calls to pci_enable_msi(), pci_enable_msix() or
pci_enable_msi_block().

99
Documentation/PCI/pci-iov-howto.txt Normal file
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@ -0,0 +1,99 @@
PCI Express I/O Virtualization Howto
Copyright (C) 2009 Intel Corporation
Yu Zhao <yu.zhao@intel.com>
1. Overview
1.1 What is SR-IOV
Single Root I/O Virtualization (SR-IOV) is a PCI Express Extended
capability which makes one physical device appear as multiple virtual
devices. The physical device is referred to as Physical Function (PF)
while the virtual devices are referred to as Virtual Functions (VF).
Allocation of the VF can be dynamically controlled by the PF via
registers encapsulated in the capability. By default, this feature is
not enabled and the PF behaves as traditional PCIe device. Once it's
turned on, each VF's PCI configuration space can be accessed by its own
Bus, Device and Function Number (Routing ID). And each VF also has PCI
Memory Space, which is used to map its register set. VF device driver
operates on the register set so it can be functional and appear as a
real existing PCI device.
2. User Guide
2.1 How can I enable SR-IOV capability
The device driver (PF driver) will control the enabling and disabling
of the capability via API provided by SR-IOV core. If the hardware
has SR-IOV capability, loading its PF driver would enable it and all
VFs associated with the PF.
2.2 How can I use the Virtual Functions
The VF is treated as hot-plugged PCI devices in the kernel, so they
should be able to work in the same way as real PCI devices. The VF
requires device driver that is same as a normal PCI device's.
3. Developer Guide
3.1 SR-IOV API
To enable SR-IOV capability:
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
'nr_virtfn' is number of VFs to be enabled.
To disable SR-IOV capability:
void pci_disable_sriov(struct pci_dev *dev);
To notify SR-IOV core of Virtual Function Migration:
irqreturn_t pci_sriov_migration(struct pci_dev *dev);
3.2 Usage example
Following piece of code illustrates the usage of the SR-IOV API.
static int __devinit dev_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
pci_enable_sriov(dev, NR_VIRTFN);
...
return 0;
}
static void __devexit dev_remove(struct pci_dev *dev)
{
pci_disable_sriov(dev);
...
}
static int dev_suspend(struct pci_dev *dev, pm_message_t state)
{
...
return 0;
}
static int dev_resume(struct pci_dev *dev)
{
...
return 0;
}
static void dev_shutdown(struct pci_dev *dev)
{
...
}
static struct pci_driver dev_driver = {
.name = "SR-IOV Physical Function driver",
.id_table = dev_id_table,
.probe = dev_probe,
.remove = __devexit_p(dev_remove),
.suspend = dev_suspend,
.resume = dev_resume,
.shutdown = dev_shutdown,
};

32
Documentation/feature-removal-schedule.txt
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@ -392,3 +392,35 @@ Why: The defines and typedefs (hw_interrupt_type, no_irq_type, irq_desc_t)
have been kept around for migration reasons. After more than two years
it's time to remove them finally
Who: Thomas Gleixner <tglx@linutronix.de>
---------------------------
What: fakephp and associated sysfs files in /sys/bus/pci/slots/
When: 2011
Why: In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to
represent a machine's physical PCI slots. The change in semantics
had userspace implications, as the hotplug core no longer allowed
drivers to create multiple sysfs files per physical slot (required
for multi-function devices, e.g.). fakephp was seen as a developer's
tool only, and its interface changed. Too late, we learned that
there were some users of the fakephp interface.
In 2.6.30, the original fakephp interface was restored. At the same
time, the PCI core gained the ability that fakephp provided, namely
function-level hot-remove and hot-add.
Since the PCI core now provides the same functionality, exposed in:
/sys/bus/pci/rescan
/sys/bus/pci/devices/.../remove
/sys/bus/pci/devices/.../rescan
there is no functional reason to maintain fakephp as well.
We will keep the existing module so that 'modprobe fakephp' will
present the old /sys/bus/pci/slots/... interface for compatibility,
but users are urged to migrate their applications to the API above.
After a reasonable transition period, we will remove the legacy
fakephp interface.
Who: Alex Chiang <achiang@hp.com>

10
Documentation/filesystems/sysfs-pci.txt
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@ -12,6 +12,7 @@ that support it. For example, a given bus might look like this:
| |-- enable
| |-- irq
| |-- local_cpus
| |-- remove
| |-- resource
| |-- resource0
| |-- resource1
@ -36,6 +37,7 @@ files, each with their own function.
enable Whether the device is enabled (ascii, rw)
irq IRQ number (ascii, ro)
local_cpus nearby CPU mask (cpumask, ro)
remove remove device from kernel's list (ascii, wo)
resource PCI resource host addresses (ascii, ro)
resource0..N PCI resource N, if present (binary, mmap)
resource0_wc..N_wc PCI WC map resource N, if prefetchable (binary, mmap)
@ -46,6 +48,7 @@ files, each with their own function.
ro - read only file
rw - file is readable and writable
wo - write only file
mmap - file is mmapable
ascii - file contains ascii text
binary - file contains binary data
@ -73,6 +76,13 @@ that the device must be enabled for a rom read to return data succesfully.
In the event a driver is not bound to the device, it can be enabled using the
'enable' file, documented above.
The 'remove' file is used to remove the PCI device, by writing a non-zero
integer to the file. This does not involve any kind of hot-plug functionality,
e.g. powering off the device. The device is removed from the kernel's list of
PCI devices, the sysfs directory for it is removed, and the device will be
removed from any drivers attached to it. Removal of PCI root buses is
disallowed.
Accessing legacy resources through sysfs
----------------------------------------

11
Documentation/kernel-parameters.txt
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@ -1695,6 +1695,8 @@ and is between 256 and 4096 characters. It is defined in the file
See also Documentation/blockdev/paride.txt.
pci=option[,option...] [PCI] various PCI subsystem options:
earlydump [X86] dump PCI config space before the kernel
changes anything
off [X86] don't probe for the PCI bus
bios [X86-32] force use of PCI BIOS, don't access
the hardware directly. Use this if your machine
@ -1794,6 +1796,15 @@ and is between 256 and 4096 characters. It is defined in the file
cbmemsize=nn[KMG] The fixed amount of bus space which is
reserved for the CardBus bridge's memory
window. The default value is 64 megabytes.
resource_alignment=
Format:
[<order of align>@][<domain>:]<bus>:<slot>.<func>[; ...]
Specifies alignment and device to reassign
aligned memory resources.
If <order of align> is not specified,
PAGE_SIZE is used as alignment.
PCI-PCI bridge can be specified, if resource
windows need to be expanded.
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
Management.

14
arch/alpha/include/asm/pci.h
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@ -273,4 +273,18 @@ struct pci_dev *alpha_gendev_to_pci(struct device *dev);
extern struct pci_dev *isa_bridge;
extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
size_t count);
extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
size_t count);
extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
struct vm_area_struct *vma,
enum pci_mmap_state mmap_state);
extern void pci_adjust_legacy_attr(struct pci_bus *bus,
enum pci_mmap_state mmap_type);
#define HAVE_PCI_LEGACY 1
extern int pci_create_resource_files(struct pci_dev *dev);
extern void pci_remove_resource_files(struct pci_dev *dev);
#endif /* __ALPHA_PCI_H */

2
arch/alpha/kernel/Makefile
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@ -12,7 +12,7 @@ obj-y := entry.o traps.o process.o init_task.o osf_sys.o irq.o \
obj-$(CONFIG_VGA_HOSE) += console.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PCI) += pci.o pci_iommu.o
obj-$(CONFIG_PCI) += pci.o pci_iommu.o pci-sysfs.o
obj-$(CONFIG_SRM_ENV) += srm_env.o
obj-$(CONFIG_MODULES) += module.o

366
arch/alpha/kernel/pci-sysfs.c Normal file
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@ -0,0 +1,366 @@
/*
* arch/alpha/kernel/pci-sysfs.c
*
* Copyright (C) 2009 Ivan Kokshaysky
*
* Alpha PCI resource files.
*
* Loosely based on generic HAVE_PCI_MMAP implementation in
* drivers/pci/pci-sysfs.c
*/
#include <linux/sched.h>
#include <linux/pci.h>
static int hose_mmap_page_range(struct pci_controller *hose,
struct vm_area_struct *vma,
enum pci_mmap_state mmap_type, int sparse)
{
unsigned long base;
if (mmap_type == pci_mmap_mem)
base = sparse ? hose->sparse_mem_base : hose->dense_mem_base;
else
base = sparse ? hose->sparse_io_base : hose->dense_io_base;
vma->vm_pgoff += base >> PAGE_SHIFT;
vma->vm_flags |= (VM_IO | VM_RESERVED);
return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
vma->vm_end - vma->vm_start,
vma->vm_page_prot);
}
static int __pci_mmap_fits(struct pci_dev *pdev, int num,
struct vm_area_struct *vma, int sparse)
{
unsigned long nr, start, size;
int shift = sparse ? 5 : 0;
nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
start = vma->vm_pgoff;
size = ((pci_resource_len(pdev, num) - 1) >> (PAGE_SHIFT - shift)) + 1;
if (start < size && size - start >= nr)
return 1;
WARN(1, "process \"%s\" tried to map%s 0x%08lx-0x%08lx on %s BAR %d "
"(size 0x%08lx)\n",
current->comm, sparse ? " sparse" : "", start, start + nr,
pci_name(pdev), num, size);
return 0;
}
/**
* pci_mmap_resource - map a PCI resource into user memory space
* @kobj: kobject for mapping
* @attr: struct bin_attribute for the file being mapped
* @vma: struct vm_area_struct passed into the mmap
* @sparse: address space type
*
* Use the bus mapping routines to map a PCI resource into userspace.
*/
static int pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
struct vm_area_struct *vma, int sparse)
{
struct pci_dev *pdev = to_pci_dev(container_of(kobj,
struct device, kobj));
struct resource *res = (struct resource *)attr->private;
enum pci_mmap_state mmap_type;
struct pci_bus_region bar;
int i;
for (i = 0; i < PCI_ROM_RESOURCE; i++)
if (res == &pdev->resource[i])
break;
if (i >= PCI_ROM_RESOURCE)
return -ENODEV;
if (!__pci_mmap_fits(pdev, i, vma, sparse))
return -EINVAL;
if (iomem_is_exclusive(res->start))
return -EINVAL;
pcibios_resource_to_bus(pdev, &bar, res);
vma->vm_pgoff += bar.start >> (PAGE_SHIFT - (sparse ? 5 : 0));
mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;
return hose_mmap_page_range(pdev->sysdata, vma, mmap_type, sparse);
}
static int pci_mmap_resource_sparse(struct kobject *kobj,
struct bin_attribute *attr,
struct vm_area_struct *vma)
{
return pci_mmap_resource(kobj, attr, vma, 1);
}
static int pci_mmap_resource_dense(struct kobject *kobj,
struct bin_attribute *attr,
struct vm_area_struct *vma)
{
return pci_mmap_resource(kobj, attr, vma, 0);
}
/**
* pci_remove_resource_files - cleanup resource files
* @dev: dev to cleanup
*
* If we created resource files for @dev, remove them from sysfs and
* free their resources.
*/
void pci_remove_resource_files(struct pci_dev *pdev)
{
int i;
for (i = 0; i < PCI_ROM_RESOURCE; i++) {
struct bin_attribute *res_attr;
res_attr = pdev->res_attr[i];
if (res_attr) {
sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
kfree(res_attr);
}
res_attr = pdev->res_attr_wc[i];
if (res_attr) {
sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);
kfree(res_attr);
}
}
}
static int sparse_mem_mmap_fits(struct pci_dev *pdev, int num)
{
struct pci_bus_region bar;
struct pci_controller *hose = pdev->sysdata;
long dense_offset;
unsigned long sparse_size;
pcibios_resource_to_bus(pdev, &bar, &pdev->resource[num]);
/* All core logic chips have 4G sparse address space, except
CIA which has 16G (see xxx_SPARSE_MEM and xxx_DENSE_MEM
definitions in asm/core_xxx.h files). This corresponds
to 128M or 512M of the bus space. */
dense_offset = (long)(hose->dense_mem_base - hose->sparse_mem_base);
sparse_size = dense_offset >= 0x400000000UL ? 0x20000000 : 0x8000000;
return bar.end < sparse_size;
}
static int pci_create_one_attr(struct pci_dev *pdev, int num, char *name,
char *suffix, struct bin_attribute *res_attr,
unsigned long sparse)
{
size_t size = pci_resource_len(pdev, num);
sprintf(name, "resource%d%s", num, suffix);
res_attr->mmap = sparse ? pci_mmap_resource_sparse :
pci_mmap_resource_dense;
res_attr->attr.name = name;
res_attr->attr.mode = S_IRUSR | S_IWUSR;
res_attr->size = sparse ? size << 5 : size;
res_attr->private = &pdev->resource[num];
return sysfs_create_bin_file(&pdev->dev.kobj, res_attr);
}
static int pci_create_attr(struct pci_dev *pdev, int num)
{
/* allocate attribute structure, piggyback attribute name */
int retval, nlen1, nlen2 = 0, res_count = 1;
unsigned long sparse_base, dense_base;
struct bin_attribute *attr;
struct pci_controller *hose = pdev->sysdata;
char *suffix, *attr_name;
suffix = ""; /* Assume bwx machine, normal resourceN files. */
nlen1 = 10;
if (pdev->resource[num].flags & IORESOURCE_MEM) {
sparse_base = hose->sparse_mem_base;
dense_base = hose->dense_mem_base;
if (sparse_base && !sparse_mem_mmap_fits(pdev, num)) {
sparse_base = 0;
suffix = "_dense";
nlen1 = 16; /* resourceN_dense */
}
} else {
sparse_base = hose->sparse_io_base;
dense_base = hose->dense_io_base;
}
if (sparse_base) {
suffix = "_sparse";
nlen1 = 17;
if (dense_base) {
nlen2 = 16; /* resourceN_dense */
res_count = 2;
}
}
attr = kzalloc(sizeof(*attr) * res_count + nlen1 + nlen2, GFP_ATOMIC);
if (!attr)
return -ENOMEM;
/* Create bwx, sparse or single dense file */
attr_name = (char *)(attr + res_count);
pdev->res_attr[num] = attr;
retval = pci_create_one_attr(pdev, num, attr_name, suffix, attr,
sparse_base);
if (retval || res_count == 1)
return retval;
/* Create dense file */
attr_name += nlen1;
attr++;
pdev->res_attr_wc[num] = attr;
return pci_create_one_attr(pdev, num, attr_name, "_dense", attr, 0);
}
/**
* pci_create_resource_files - create resource files in sysfs for @dev
* @dev: dev in question
*
* Walk the resources in @dev creating files for each resource available.
*/
int pci_create_resource_files(struct pci_dev *pdev)
{
int i;
int retval;
/* Expose the PCI resources from this device as files */
for (i = 0; i < PCI_ROM_RESOURCE; i++) {
/* skip empty resources */
if (!pci_resource_len(pdev, i))
continue;
retval = pci_create_attr(pdev, i);
if (retval) {
pci_remove_resource_files(pdev);
return retval;
}
}
return 0;
}
/* Legacy I/O bus mapping stuff. */
static int __legacy_mmap_fits(struct pci_controller *hose,
struct vm_area_struct *vma,
unsigned long res_size, int sparse)
{
unsigned long nr, start, size;
nr = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
start = vma->vm_pgoff;
size = ((res_size - 1) >> PAGE_SHIFT) + 1;
if (start < size && size - start >= nr)
return 1;
WARN(1, "process \"%s\" tried to map%s 0x%08lx-0x%08lx on hose %d "
"(size 0x%08lx)\n",
current->comm, sparse ? " sparse" : "", start, start + nr,
hose->index, size);
return 0;
}
static inline int has_sparse(struct pci_controller *hose,
enum pci_mmap_state mmap_type)
{
unsigned long base;
base = (mmap_type == pci_mmap_mem) ? hose->sparse_mem_base :
hose->sparse_io_base;
return base != 0;
}
int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,
enum pci_mmap_state mmap_type)
{
struct pci_controller *hose = bus->sysdata;
int sparse = has_sparse(hose, mmap_type);
unsigned long res_size;
res_size = (mmap_type == pci_mmap_mem) ? bus->legacy_mem->size :
bus->legacy_io->size;
if (!__legacy_mmap_fits(hose, vma, res_size, sparse))
return -EINVAL;
return hose_mmap_page_range(hose, vma, mmap_type, sparse);
}
/**
* pci_adjust_legacy_attr - adjustment of legacy file attributes
* @b: bus to create files under
* @mmap_type: I/O port or memory
*
* Adjust file name and size for sparse mappings.
*/
void pci_adjust_legacy_attr(struct pci_bus *bus, enum pci_mmap_state mmap_type)
{
struct pci_controller *hose = bus->sysdata;
if (!has_sparse(hose, mmap_type))
return;
if (mmap_type == pci_mmap_mem) {
bus->legacy_mem->attr.name = "legacy_mem_sparse";
bus->legacy_mem->size <<= 5;
} else {
bus->legacy_io->attr.name = "legacy_io_sparse";
bus->legacy_io->size <<= 5;
}
return;
}
/* Legacy I/O bus read/write functions */
int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val, size_t size)
{
struct pci_controller *hose = bus->sysdata;
port += hose->io_space->start;
switch(size) {
case 1:
*((u8 *)val) = inb(port);
return 1;
case 2:
if (port & 1)
return -EINVAL;
*((u16 *)val) = inw(port);
return 2;
case 4:
if (port & 3)
return -EINVAL;
*((u32 *)val) = inl(port);
return 4;
}
return -EINVAL;
}
int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val, size_t size)
{
struct pci_controller *hose = bus->sysdata;
port += hose->io_space->start;
switch(size) {
case 1:
outb(port, val);
return 1;
case 2:
if (port & 1)
return -EINVAL;
outw(port, val);
return 2;
case 4:
if (port & 3)
return -EINVAL;
outl(port, val);
return 4;
}
return -EINVAL;
}

4
arch/powerpc/include/asm/pci.h
Просмотреть файл

@ -114,6 +114,10 @@ extern int pci_domain_nr(struct pci_bus *bus);
/* Decide whether to display the domain number in /proc */
extern int pci_proc_domain(struct pci_bus *bus);
/* MSI arch hooks */
#define arch_setup_msi_irqs arch_setup_msi_irqs
#define arch_teardown_msi_irqs arch_teardown_msi_irqs
#define arch_msi_check_device arch_msi_check_device
struct vm_area_struct;
/* Map a range of PCI memory or I/O space for a device into user space */

5
arch/powerpc/kernel/msi.c
Просмотреть файл

@ -9,6 +9,7 @@
#include <linux/kernel.h>
#include <linux/msi.h>
#include <linux/pci.h>
#include <asm/machdep.h>
@ -19,6 +20,10 @@ int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
return -ENOSYS;
}
/* PowerPC doesn't support multiple MSI yet */
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
if (ppc_md.msi_check_device) {
pr_debug("msi: Using platform check routine.\n");
return ppc_md.msi_check_device(dev, nvec, type);

3
arch/x86/include/asm/pci.h
Просмотреть файл

@ -86,6 +86,9 @@ static inline void early_quirks(void) { }
extern void pci_iommu_alloc(void);
/* MSI arch hook */
#define arch_setup_msi_irqs arch_setup_msi_irqs
#endif /* __KERNEL__ */
#ifdef CONFIG_X86_32

4
arch/x86/kernel/apic/io_apic.c
Просмотреть файл

@ -3468,6 +3468,10 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
struct intel_iommu *iommu = NULL;
int index = 0;
/* x86 doesn't support multiple MSI yet */
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
irq_want = nr_irqs_gsi;
sub_handle = 0;
list_for_each_entry(msidesc, &dev->msi_list, list) {

3
arch/x86/kernel/pci-dma.c
Просмотреть файл

@ -300,8 +300,7 @@ fs_initcall(pci_iommu_init);
static __devinit void via_no_dac(struct pci_dev *dev)
{
if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
printk(KERN_INFO
"PCI: VIA PCI bridge detected. Disabling DAC.\n");
dev_info(&dev->dev, "disabling DAC on VIA PCI bridge\n");
forbid_dac = 1;
}
}

19
arch/x86/pci/early.c
Просмотреть файл

@ -69,11 +69,12 @@ void early_dump_pci_device(u8 bus, u8 slot, u8 func)
int j;
u32 val;
printk(KERN_INFO "PCI: %02x:%02x:%02x", bus, slot, func);
printk(KERN_INFO "pci 0000:%02x:%02x.%d config space:",
bus, slot, func);
for (i = 0; i < 256; i += 4) {
if (!(i & 0x0f))
printk("\n%04x:",i);
printk("\n %02x:",i);
val = read_pci_config(bus, slot, func, i);
for (j = 0; j < 4; j++) {
@ -96,20 +97,22 @@ void early_dump_pci_devices(void)
for (func = 0; func < 8; func++) {
u32 class;
u8 type;
class = read_pci_config(bus, slot, func,
PCI_CLASS_REVISION);
if (class == 0xffffffff)
break;
continue;
early_dump_pci_device(bus, slot, func);
/* No multi-function device? */
type = read_pci_config_byte(bus, slot, func,
if (func == 0) {
type = read_pci_config_byte(bus, slot,
func,
PCI_HEADER_TYPE);
if (!(type & 0x80))
break;
if (!(type & 0x80))
break;
}
}
}
}
}

20
arch/x86/pci/fixup.c
Просмотреть файл

@ -494,26 +494,6 @@ static void __devinit pci_siemens_interrupt_controller(struct pci_dev *dev)
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015,
pci_siemens_interrupt_controller);
/*
* Regular PCI devices have 256 bytes, but AMD Family 10h/11h CPUs have
* 4096 bytes configuration space for each function of their processor
* configuration space.
*/
static void amd_cpu_pci_cfg_space_size(struct pci_dev *dev)
{
dev->cfg_size = pci_cfg_space_size_ext(dev);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1200, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1201, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1202, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1203, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1204, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1300, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1301, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1302, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1303, amd_cpu_pci_cfg_space_size);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1304, amd_cpu_pci_cfg_space_size);
/*
* SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
* confusing the PCI engine:

3
arch/x86/pci/legacy.c
Просмотреть файл

@ -50,8 +50,6 @@ static int __init pci_legacy_init(void)
if (pci_root_bus)
pci_bus_add_devices(pci_root_bus);
pcibios_fixup_peer_bridges();
return 0;
}
@ -67,6 +65,7 @@ int __init pci_subsys_init(void)
pci_visws_init();
#endif
pci_legacy_init();
pcibios_fixup_peer_bridges();
pcibios_irq_init();
pcibios_init();

225
arch/x86/pci/mmconfig-shared.c
Просмотреть файл

@ -14,6 +14,7 @@
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/bitmap.h>
#include <linux/sort.h>
#include <asm/e820.h>
#include <asm/pci_x86.h>
@ -24,24 +25,49 @@
/* Indicate if the mmcfg resources have been placed into the resource table. */
static int __initdata pci_mmcfg_resources_inserted;
static __init int extend_mmcfg(int num)
{
struct acpi_mcfg_allocation *new;
int new_num = pci_mmcfg_config_num + num;
new = kzalloc(sizeof(pci_mmcfg_config[0]) * new_num, GFP_KERNEL);
if (!new)
return -1;
if (pci_mmcfg_config) {
memcpy(new, pci_mmcfg_config,
sizeof(pci_mmcfg_config[0]) * new_num);
kfree(pci_mmcfg_config);
}
pci_mmcfg_config = new;
return 0;
}
static __init void fill_one_mmcfg(u64 addr, int segment, int start, int end)
{
int i = pci_mmcfg_config_num;
pci_mmcfg_config_num++;
pci_mmcfg_config[i].address = addr;
pci_mmcfg_config[i].pci_segment = segment;
pci_mmcfg_config[i].start_bus_number = start;
pci_mmcfg_config[i].end_bus_number = end;
}
static const char __init *pci_mmcfg_e7520(void)
{
u32 win;
raw_pci_ops->read(0, 0, PCI_DEVFN(0, 0), 0xce, 2, &win);
win = win & 0xf000;
if(win == 0x0000 || win == 0xf000)
pci_mmcfg_config_num = 0;
else {
pci_mmcfg_config_num = 1;
pci_mmcfg_config = kzalloc(sizeof(pci_mmcfg_config[0]), GFP_KERNEL);
if (!pci_mmcfg_config)
return NULL;
pci_mmcfg_config[0].address = win << 16;
pci_mmcfg_config[0].pci_segment = 0;
pci_mmcfg_config[0].start_bus_number = 0;
pci_mmcfg_config[0].end_bus_number = 255;
}
if (win == 0x0000 || win == 0xf000)
return NULL;
if (extend_mmcfg(1) == -1)
return NULL;
fill_one_mmcfg(win << 16, 0, 0, 255);
return "Intel Corporation E7520 Memory Controller Hub";
}
@ -50,13 +76,11 @@ static const char __init *pci_mmcfg_intel_945(void)
{
u32 pciexbar, mask = 0, len = 0;
pci_mmcfg_config_num = 1;
raw_pci_ops->read(0, 0, PCI_DEVFN(0, 0), 0x48, 4, &pciexbar);
/* Enable bit */
if (!(pciexbar & 1))
pci_mmcfg_config_num = 0;
return NULL;
/* Size bits */
switch ((pciexbar >> 1) & 3) {
@ -73,28 +97,23 @@ static const char __init *pci_mmcfg_intel_945(void)
len = 0x04000000U;
break;
default:
pci_mmcfg_config_num = 0;
return NULL;
}
/* Errata #2, things break when not aligned on a 256Mb boundary */
/* Can only happen in 64M/128M mode */
if ((pciexbar & mask) & 0x0fffffffU)
pci_mmcfg_config_num = 0;
return NULL;
/* Don't hit the APIC registers and their friends */
if ((pciexbar & mask) >= 0xf0000000U)
pci_mmcfg_config_num = 0;
return NULL;
if (pci_mmcfg_config_num) {
pci_mmcfg_config = kzalloc(sizeof(pci_mmcfg_config[0]), GFP_KERNEL);
if (!pci_mmcfg_config)
return NULL;
pci_mmcfg_config[0].address = pciexbar & mask;
pci_mmcfg_config[0].pci_segment = 0;
pci_mmcfg_config[0].start_bus_number = 0;
pci_mmcfg_config[0].end_bus_number = (len >> 20) - 1;
}
if (extend_mmcfg(1) == -1)
return NULL;
fill_one_mmcfg(pciexbar & mask, 0, 0, (len >> 20) - 1);
return "Intel Corporation 945G/GZ/P/PL Express Memory Controller Hub";
}
@ -138,22 +157,77 @@ static const char __init *pci_mmcfg_amd_fam10h(void)
busnbits = 8;
}
pci_mmcfg_config_num = (1 << segnbits);
pci_mmcfg_config = kzalloc(sizeof(pci_mmcfg_config[0]) *
pci_mmcfg_config_num, GFP_KERNEL);
if (!pci_mmcfg_config)
if (extend_mmcfg(1 << segnbits) == -1)
return NULL;
for (i = 0; i < (1 << segnbits); i++) {
pci_mmcfg_config[i].address = base + (1<<28) * i;
pci_mmcfg_config[i].pci_segment = i;
pci_mmcfg_config[i].start_bus_number = 0;
pci_mmcfg_config[i].end_bus_number = (1 << busnbits) - 1;
}
for (i = 0; i < (1 << segnbits); i++)
fill_one_mmcfg(base + (1<<28) * i, i, 0, (1 << busnbits) - 1);
return "AMD Family 10h NB";
}
static bool __initdata mcp55_checked;
static const char __init *pci_mmcfg_nvidia_mcp55(void)
{
int bus;
int mcp55_mmconf_found = 0;
static const u32 extcfg_regnum = 0x90;
static const u32 extcfg_regsize = 4;
static const u32 extcfg_enable_mask = 1<<31;
static const u32 extcfg_start_mask = 0xff<<16;
static const int extcfg_start_shift = 16;
static const u32 extcfg_size_mask = 0x3<<28;
static const int extcfg_size_shift = 28;
static const int extcfg_sizebus[] = {0x100, 0x80, 0x40, 0x20};
static const u32 extcfg_base_mask[] = {0x7ff8, 0x7ffc, 0x7ffe, 0x7fff};
static const int extcfg_base_lshift = 25;
/*
* do check if amd fam10h already took over
*/
if (!acpi_disabled || pci_mmcfg_config_num || mcp55_checked)
return NULL;
mcp55_checked = true;
for (bus = 0; bus < 256; bus++) {
u64 base;
u32 l, extcfg;
u16 vendor, device;
int start, size_index, end;
raw_pci_ops->read(0, bus, PCI_DEVFN(0, 0), 0, 4, &l);
vendor = l & 0xffff;
device = (l >> 16) & 0xffff;
if (PCI_VENDOR_ID_NVIDIA != vendor || 0x0369 != device)
continue;
raw_pci_ops->read(0, bus, PCI_DEVFN(0, 0), extcfg_regnum,
extcfg_regsize, &extcfg);
if (!(extcfg & extcfg_enable_mask))
continue;
if (extend_mmcfg(1) == -1)
continue;
size_index = (extcfg & extcfg_size_mask) >> extcfg_size_shift;
base = extcfg & extcfg_base_mask[size_index];
/* base could > 4G */
base <<= extcfg_base_lshift;
start = (extcfg & extcfg_start_mask) >> extcfg_start_shift;
end = start + extcfg_sizebus[size_index] - 1;
fill_one_mmcfg(base, 0, start, end);
mcp55_mmconf_found++;
}
if (!mcp55_mmconf_found)
return NULL;
return "nVidia MCP55";
}
struct pci_mmcfg_hostbridge_probe {
u32 bus;
u32 devfn;
@ -171,8 +245,52 @@ static struct pci_mmcfg_hostbridge_probe pci_mmcfg_probes[] __initdata = {
0x1200, pci_mmcfg_amd_fam10h },
{ 0xff, PCI_DEVFN(0, 0), PCI_VENDOR_ID_AMD,
0x1200, pci_mmcfg_amd_fam10h },
{ 0, PCI_DEVFN(0, 0), PCI_VENDOR_ID_NVIDIA,
0x0369, pci_mmcfg_nvidia_mcp55 },
};
static int __init cmp_mmcfg(const void *x1, const void *x2)
{
const typeof(pci_mmcfg_config[0]) *m1 = x1;
const typeof(pci_mmcfg_config[0]) *m2 = x2;
int start1, start2;
start1 = m1->start_bus_number;
start2 = m2->start_bus_number;
return start1 - start2;
}
static void __init pci_mmcfg_check_end_bus_number(void)
{
int i;
typeof(pci_mmcfg_config[0]) *cfg, *cfgx;
/* sort them at first */
sort(pci_mmcfg_config, pci_mmcfg_config_num,
sizeof(pci_mmcfg_config[0]), cmp_mmcfg, NULL);
/* last one*/
if (pci_mmcfg_config_num > 0) {
i = pci_mmcfg_config_num - 1;
cfg = &pci_mmcfg_config[i];
if (cfg->end_bus_number < cfg->start_bus_number)
cfg->end_bus_number = 255;
}
/* don't overlap please */
for (i = 0; i < pci_mmcfg_config_num - 1; i++) {
cfg = &pci_mmcfg_config[i];
cfgx = &pci_mmcfg_config[i+1];
if (cfg->end_bus_number < cfg->start_bus_number)
cfg->end_bus_number = 255;
if (cfg->end_bus_number >= cfgx->start_bus_number)
cfg->end_bus_number = cfgx->start_bus_number - 1;
}
}
static int __init pci_mmcfg_check_hostbridge(void)
{
u32 l;
@ -186,31 +304,33 @@ static int __init pci_mmcfg_check_hostbridge(void)
pci_mmcfg_config_num = 0;
pci_mmcfg_config = NULL;
name = NULL;
for (i = 0; !name && i < ARRAY_SIZE(pci_mmcfg_probes); i++) {
for (i = 0; i < ARRAY_SIZE(pci_mmcfg_probes); i++) {
bus = pci_mmcfg_probes[i].bus;
devfn = pci_mmcfg_probes[i].devfn;
raw_pci_ops->read(0, bus, devfn, 0, 4, &l);
vendor = l & 0xffff;
device = (l >> 16) & 0xffff;
name = NULL;
if (pci_mmcfg_probes[i].vendor == vendor &&
pci_mmcfg_probes[i].device == device)
name = pci_mmcfg_probes[i].probe();
if (name)
printk(KERN_INFO "PCI: Found %s with MMCONFIG support.\n",
name);
}
if (name) {
printk(KERN_INFO "PCI: Found %s %s MMCONFIG support.\n",
name, pci_mmcfg_config_num ? "with" : "without");
}
/* some end_bus_number is crazy, fix it */
pci_mmcfg_check_end_bus_number();
return name != NULL;
return pci_mmcfg_config_num != 0;
}
static void __init pci_mmcfg_insert_resources(void)
{
#define PCI_MMCFG_RESOURCE_NAME_LEN 19
#define PCI_MMCFG_RESOURCE_NAME_LEN 24
int i;
struct resource *res;
char *names;
@ -228,9 +348,10 @@ static void __init pci_mmcfg_insert_resources(void)
struct acpi_mcfg_allocation *cfg = &pci_mmcfg_config[i];
num_buses = cfg->end_bus_number - cfg->start_bus_number + 1;
res->name = names;
snprintf(names, PCI_MMCFG_RESOURCE_NAME_LEN, "PCI MMCONFIG %u",
cfg->pci_segment);
res->start = cfg->address;
snprintf(names, PCI_MMCFG_RESOURCE_NAME_LEN,
"PCI MMCONFIG %u [%02x-%02x]", cfg->pci_segment,
cfg->start_bus_number, cfg->end_bus_number);
res->start = cfg->address + (cfg->start_bus_number << 20);
res->end = res->start + (num_buses << 20) - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
insert_resource(&iomem_resource, res);
@ -354,8 +475,6 @@ static void __init pci_mmcfg_reject_broken(int early)
(pci_mmcfg_config[0].address == 0))
return;
cfg = &pci_mmcfg_config[0];
for (i = 0; i < pci_mmcfg_config_num; i++) {
int valid = 0;
u64 addr, size;
@ -423,10 +542,10 @@ static void __init __pci_mmcfg_init(int early)
known_bridge = 1;
}
if (!known_bridge) {
if (!known_bridge)
acpi_table_parse(ACPI_SIG_MCFG, acpi_parse_mcfg);
pci_mmcfg_reject_broken(early);
}
pci_mmcfg_reject_broken(early);
if ((pci_mmcfg_config_num == 0) ||
(pci_mmcfg_config == NULL) ||

15
arch/x86/pci/mmconfig_64.c
Просмотреть файл

@ -112,13 +112,18 @@ static struct pci_raw_ops pci_mmcfg = {
static void __iomem * __init mcfg_ioremap(struct acpi_mcfg_allocation *cfg)
{
void __iomem *addr;
u32 size;
u64 start, size;
size = (cfg->end_bus_number + 1) << 20;
addr = ioremap_nocache(cfg->address, size);
start = cfg->start_bus_number;
start <<= 20;
start += cfg->address;
size = cfg->end_bus_number + 1 - cfg->start_bus_number;
size <<= 20;
addr = ioremap_nocache(start, size);
if (addr) {
printk(KERN_INFO "PCI: Using MMCONFIG at %Lx - %Lx\n",
cfg->address, cfg->address + size - 1);
start, start + size - 1);
addr -= cfg->start_bus_number << 20;
}
return addr;
}
@ -157,7 +162,7 @@ void __init pci_mmcfg_arch_free(void)
for (i = 0; i < pci_mmcfg_config_num; ++i) {
if (pci_mmcfg_virt[i].virt) {
iounmap(pci_mmcfg_virt[i].virt);
iounmap(pci_mmcfg_virt[i].virt + (pci_mmcfg_virt[i].cfg->start_bus_number << 20));
pci_mmcfg_virt[i].virt = NULL;
pci_mmcfg_virt[i].cfg = NULL;
}

180
drivers/acpi/pci_root.c
Просмотреть файл

@ -66,11 +66,18 @@ struct acpi_pci_root {
struct acpi_device * device;
struct acpi_pci_id id;
struct pci_bus *bus;
u32 osc_support_set; /* _OSC state of support bits */
u32 osc_control_set; /* _OSC state of control bits */
u32 osc_control_qry; /* the latest _OSC query result */
u32 osc_queried:1; /* has _OSC control been queried? */
};
static LIST_HEAD(acpi_pci_roots);
static struct acpi_pci_driver *sub_driver;
static DEFINE_MUTEX(osc_lock);
int acpi_pci_register_driver(struct acpi_pci_driver *driver)
{
@ -185,6 +192,175 @@ static void acpi_pci_bridge_scan(struct acpi_device *device)
}
}
static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40,
0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
static acpi_status acpi_pci_run_osc(acpi_handle handle,
const u32 *capbuf, u32 *retval)
{
acpi_status status;
struct acpi_object_list input;
union acpi_object in_params[4];
struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *out_obj;
u32 errors;
/* Setting up input parameters */
input.count = 4;
input.pointer = in_params;
in_params[0].type = ACPI_TYPE_BUFFER;
in_params[0].buffer.length = 16;
in_params[0].buffer.pointer = OSC_UUID;
in_params[1].type = ACPI_TYPE_INTEGER;
in_params[1].integer.value = 1;
in_params[2].type = ACPI_TYPE_INTEGER;
in_params[2].integer.value = 3;
in_params[3].type = ACPI_TYPE_BUFFER;
in_params[3].buffer.length = 12;
in_params[3].buffer.pointer = (u8 *)capbuf;
status = acpi_evaluate_object(handle, "_OSC", &input, &output);
if (ACPI_FAILURE(status))
return status;
if (!output.length)
return AE_NULL_OBJECT;
out_obj = output.pointer;
if (out_obj->type != ACPI_TYPE_BUFFER) {
printk(KERN_DEBUG "_OSC evaluation returned wrong type\n");
status = AE_TYPE;
goto out_kfree;
}
/* Need to ignore the bit0 in result code */
errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
if (errors) {
if (errors & OSC_REQUEST_ERROR)
printk(KERN_DEBUG "_OSC request failed\n");
if (errors & OSC_INVALID_UUID_ERROR)
printk(KERN_DEBUG "_OSC invalid UUID\n");
if (errors & OSC_INVALID_REVISION_ERROR)
printk(KERN_DEBUG "_OSC invalid revision\n");
if (errors & OSC_CAPABILITIES_MASK_ERROR) {
if (capbuf[OSC_QUERY_TYPE] & OSC_QUERY_ENABLE)
goto out_success;
printk(KERN_DEBUG
"Firmware did not grant requested _OSC control\n");
status = AE_SUPPORT;
goto out_kfree;
}
status = AE_ERROR;
goto out_kfree;
}
out_success:
*retval = *((u32 *)(out_obj->buffer.pointer + 8));
status = AE_OK;
out_kfree:
kfree(output.pointer);
return status;
}
static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags)
{
acpi_status status;
u32 support_set, result, capbuf[3];
/* do _OSC query for all possible controls */
support_set = root->osc_support_set | (flags & OSC_SUPPORT_MASKS);
capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
capbuf[OSC_SUPPORT_TYPE] = support_set;
capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
if (ACPI_SUCCESS(status)) {
root->osc_support_set = support_set;
root->osc_control_qry = result;
root->osc_queried = 1;
}
return status;
}
static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
{
acpi_status status;
acpi_handle tmp;
status = acpi_get_handle(root->device->handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
mutex_lock(&osc_lock);
status = acpi_pci_query_osc(root, flags);
mutex_unlock(&osc_lock);
return status;
}
static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
{
struct acpi_pci_root *root;
list_for_each_entry(root, &acpi_pci_roots, node) {
if (root->device->handle == handle)
return root;
}
return NULL;
}
/**
* acpi_pci_osc_control_set - commit requested control to Firmware
* @handle: acpi_handle for the target ACPI object
* @flags: driver's requested control bits
*
* Attempt to take control from Firmware on requested control bits.
**/
acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
{
acpi_status status;
u32 control_req, result, capbuf[3];
acpi_handle tmp;
struct acpi_pci_root *root;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
control_req = (flags & OSC_CONTROL_MASKS);
if (!control_req)
return AE_TYPE;
root = acpi_pci_find_root(handle);
if (!root)
return AE_NOT_EXIST;
mutex_lock(&osc_lock);
/* No need to evaluate _OSC if the control was already granted. */
if ((root->osc_control_set & control_req) == control_req)
goto out;
/* Need to query controls first before requesting them */
if (!root->osc_queried) {
status = acpi_pci_query_osc(root, root->osc_support_set);
if (ACPI_FAILURE(status))
goto out;
}
if ((root->osc_control_qry & control_req) != control_req) {
printk(KERN_DEBUG
"Firmware did not grant requested _OSC control\n");
status = AE_SUPPORT;
goto out;
}
capbuf[OSC_QUERY_TYPE] = 0;
capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set;
capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req;
status = acpi_pci_run_osc(handle, capbuf, &result);
if (ACPI_SUCCESS(status))
root->osc_control_set = result;
out:
mutex_unlock(&osc_lock);
return status;
}
EXPORT_SYMBOL(acpi_pci_osc_control_set);
static int __devinit acpi_pci_root_add(struct acpi_device *device)
{
int result = 0;
@ -217,7 +393,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
* PCI domains, so we indicate this in _OSC support capabilities.
*/
flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
pci_acpi_osc_support(device->handle, flags);
acpi_pci_osc_support(root, flags);
/*
* Segment
@ -353,7 +529,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
if (pci_msi_enabled())
flags |= OSC_MSI_SUPPORT;
if (flags != base_flags)
pci_acpi_osc_support(device->handle, flags);
acpi_pci_osc_support(root, flags);
end:
if (result) {

10
drivers/pci/Kconfig
Просмотреть файл

@ -59,3 +59,13 @@ config HT_IRQ
This allows native hypertransport devices to use interrupts.
If unsure say Y.
config PCI_IOV
bool "PCI IOV support"
depends on PCI
help
I/O Virtualization is a PCI feature supported by some devices
which allows them to create virtual devices which share their
physical resources.
If unsure, say N.

2
drivers/pci/Makefile
Просмотреть файл

@ -29,6 +29,8 @@ obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o
obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o
obj-$(CONFIG_PCI_IOV) += iov.o
#
# Some architectures use the generic PCI setup functions
#

8
drivers/pci/bus.c
Просмотреть файл

@ -133,7 +133,7 @@ int pci_bus_add_child(struct pci_bus *bus)
*
* Call hotplug for each new devices.
*/
void pci_bus_add_devices(struct pci_bus *bus)
void pci_bus_add_devices(const struct pci_bus *bus)
{
struct pci_dev *dev;
struct pci_bus *child;
@ -184,8 +184,10 @@ void pci_enable_bridges(struct pci_bus *bus)
list_for_each_entry(dev, &bus->devices, bus_list) {
if (dev->subordinate) {
retval = pci_enable_device(dev);
pci_set_master(dev);
if (atomic_read(&dev->enable_cnt) == 0) {
retval = pci_enable_device(dev);
pci_set_master(dev);
}
pci_enable_bridges(dev->subordinate);
}
}

56
drivers/pci/hotplug/acpi_pcihp.c
Просмотреть файл

@ -30,9 +30,8 @@
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/acpi.h>
#include <linux/pci-acpi.h>
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#define MY_NAME "acpi_pcihp"
@ -333,19 +332,14 @@ acpi_status acpi_get_hp_params_from_firmware(struct pci_bus *bus,
{
acpi_status status = AE_NOT_FOUND;
acpi_handle handle, phandle;
struct pci_bus *pbus = bus;
struct pci_dev *pdev;
struct pci_bus *pbus;
do {
pdev = pbus->self;
if (!pdev) {
handle = acpi_get_pci_rootbridge_handle(
pci_domain_nr(pbus), pbus->number);
handle = NULL;
for (pbus = bus; pbus; pbus = pbus->parent) {
handle = acpi_pci_get_bridge_handle(pbus);
if (handle)
break;
}
handle = DEVICE_ACPI_HANDLE(&(pdev->dev));
pbus = pbus->parent;
} while (!handle);
}
/*
* _HPP settings apply to all child buses, until another _HPP is
@ -378,12 +372,10 @@ EXPORT_SYMBOL_GPL(acpi_get_hp_params_from_firmware);
*
* Attempt to take hotplug control from firmware.
*/
int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags)
int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
{
acpi_status status;
acpi_handle chandle, handle;
struct pci_dev *pdev = dev;
struct pci_bus *parent;
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
flags &= (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
@ -408,33 +400,25 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags)
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
dbg("Trying to get hotplug control for %s\n",
(char *)string.pointer);
status = pci_osc_control_set(handle, flags);
status = acpi_pci_osc_control_set(handle, flags);
if (ACPI_SUCCESS(status))
goto got_one;
kfree(string.pointer);
string = (struct acpi_buffer){ ACPI_ALLOCATE_BUFFER, NULL };
}
pdev = dev;
handle = DEVICE_ACPI_HANDLE(&dev->dev);
while (!handle) {
handle = DEVICE_ACPI_HANDLE(&pdev->dev);
if (!handle) {
/*
* This hotplug controller was not listed in the ACPI name
* space at all. Try to get acpi handle of parent pci bus.
*/
if (!pdev || !pdev->bus->parent)
break;
parent = pdev->bus->parent;
dbg("Could not find %s in acpi namespace, trying parent\n",
pci_name(pdev));
if (!parent->self)
/* Parent must be a host bridge */
handle = acpi_get_pci_rootbridge_handle(
pci_domain_nr(parent),
parent->number);
else
handle = DEVICE_ACPI_HANDLE(&(parent->self->dev));
pdev = parent->self;
struct pci_bus *pbus;
for (pbus = pdev->bus; pbus; pbus = pbus->parent) {
handle = acpi_pci_get_bridge_handle(pbus);
if (handle)
break;
}
}
while (handle) {
@ -453,13 +437,13 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *dev, u32 flags)
}
dbg("Cannot get control of hotplug hardware for pci %s\n",
pci_name(dev));
pci_name(pdev));
kfree(string.pointer);
return -ENODEV;
got_one:
dbg("Gained control for hotplug HW for pci %s (%s)\n", pci_name(dev),
(char *)string.pointer);
dbg("Gained control for hotplug HW for pci %s (%s)\n",
pci_name(pdev), (char *)string.pointer);
kfree(string.pointer);
return 0;
}

482
drivers/pci/hotplug/fakephp.c
Просмотреть файл

@ -1,395 +1,163 @@
/*
* Fake PCI Hot Plug Controller Driver
/* Works like the fakephp driver used to, except a little better.
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2003 IBM Corp.
* Copyright (C) 2003 Rolf Eike Beer <eike-kernel@sf-tec.de>
* - It's possible to remove devices with subordinate busses.
* - New PCI devices that appear via any method, not just a fakephp triggered
* rescan, will be noticed.
* - Devices that are removed via any method, not just a fakephp triggered
* removal, will also be noticed.
*
* Based on ideas and code from:
* Vladimir Kondratiev <vladimir.kondratiev@intel.com>
* Rolf Eike Beer <eike-kernel@sf-tec.de>
* Uses nothing from the pci-hotplug subsystem.
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* Send feedback to <greg@kroah.com>
*/
/*
*
* This driver will "emulate" removing PCI devices from the system. If
* the "power" file is written to with "0" then the specified PCI device
* will be completely removed from the kernel.
*
* WARNING, this does NOT turn off the power to the PCI device. This is
* a "logical" removal, not a physical or electrical removal.
*
* Use this module at your own risk, you have been warned!
*
* Enabling PCI devices is left as an exercise for the reader...
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/list.h>
#include <linux/kobject.h>
#include <linux/sysfs.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/pci.h>
#include <linux/device.h>
#include "../pci.h"
#if !defined(MODULE)
#define MY_NAME "fakephp"
#else
#define MY_NAME THIS_MODULE->name
#endif
#define dbg(format, arg...) \
do { \
if (debug) \
printk(KERN_DEBUG "%s: " format, \
MY_NAME , ## arg); \
} while (0)
#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
#define DRIVER_DESC "Fake PCI Hot Plug Controller Driver"
struct dummy_slot {
struct list_head node;
struct hotplug_slot *slot;
struct pci_dev *dev;
struct work_struct remove_work;
unsigned long removed;
struct legacy_slot {
struct kobject kobj;
struct pci_dev *dev;
struct list_head list;
};
static int debug;
static int dup_slots;
static LIST_HEAD(slot_list);
static struct workqueue_struct *dummyphp_wq;
static LIST_HEAD(legacy_list);
static void pci_rescan_worker(struct work_struct *work);
static DECLARE_WORK(pci_rescan_work, pci_rescan_worker);
static int enable_slot (struct hotplug_slot *slot);
static int disable_slot (struct hotplug_slot *slot);
static struct hotplug_slot_ops dummy_hotplug_slot_ops = {
.owner = THIS_MODULE,
.enable_slot = enable_slot,
.disable_slot = disable_slot,
};
static void dummy_release(struct hotplug_slot *slot)
static ssize_t legacy_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct dummy_slot *dslot = slot->private;
list_del(&dslot->node);
kfree(dslot->slot->info);
kfree(dslot->slot);
pci_dev_put(dslot->dev);
kfree(dslot);
struct legacy_slot *slot = container_of(kobj, typeof(*slot), kobj);
strcpy(buf, "1\n");
return 2;
}
#define SLOT_NAME_SIZE 8
static int add_slot(struct pci_dev *dev)
static void remove_callback(void *data)
{
struct dummy_slot *dslot;
struct hotplug_slot *slot;
char name[SLOT_NAME_SIZE];
int retval = -ENOMEM;
static int count = 1;
pci_remove_bus_device((struct pci_dev *)data);
}
slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
if (!slot)
goto error;
static ssize_t legacy_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t len)
{
struct legacy_slot *slot = container_of(kobj, typeof(*slot), kobj);
unsigned long val;
slot->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
if (!slot->info)
goto error_slot;
if (strict_strtoul(buf, 0, &val) < 0)
return -EINVAL;
slot->info->power_status = 1;
slot->info->max_bus_speed = PCI_SPEED_UNKNOWN;
slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
dslot = kzalloc(sizeof(struct dummy_slot), GFP_KERNEL);
if (!dslot)
goto error_info;
if (dup_slots)
snprintf(name, SLOT_NAME_SIZE, "fake");
if (val)
pci_rescan_bus(slot->dev->bus);
else
snprintf(name, SLOT_NAME_SIZE, "fake%d", count++);
dbg("slot->name = %s\n", name);
slot->ops = &dummy_hotplug_slot_ops;
slot->release = &dummy_release;
slot->private = dslot;
sysfs_schedule_callback(&slot->dev->dev.kobj, remove_callback,
slot->dev, THIS_MODULE);
return len;
}
retval = pci_hp_register(slot, dev->bus, PCI_SLOT(dev->devfn), name);
if (retval) {
err("pci_hp_register failed with error %d\n", retval);
goto error_dslot;
}
static struct attribute *legacy_attrs[] = {
&(struct attribute){ .name = "power", .mode = 0644 },
NULL,
};
dbg("slot->name = %s\n", hotplug_slot_name(slot));
dslot->slot = slot;
dslot->dev = pci_dev_get(dev);
list_add (&dslot->node, &slot_list);
return retval;
static void legacy_release(struct kobject *kobj)
{
struct legacy_slot *slot = container_of(kobj, typeof(*slot), kobj);
error_dslot:
kfree(dslot);
error_info:
kfree(slot->info);
error_slot:
pci_dev_put(slot->dev);
kfree(slot);
error:
return retval;
}
static int __init pci_scan_buses(void)
static struct kobj_type legacy_ktype = {
.sysfs_ops = &(struct sysfs_ops){
.store = legacy_store, .show = legacy_show
},
.release = &legacy_release,
.default_attrs = legacy_attrs,
};
static int legacy_add_slot(struct pci_dev *pdev)
{
struct pci_dev *dev = NULL;
int lastslot = 0;
while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
if (PCI_FUNC(dev->devfn) > 0 &&
lastslot == PCI_SLOT(dev->devfn))
continue;
lastslot = PCI_SLOT(dev->devfn);
add_slot(dev);
}
return 0;
}
static void remove_slot(struct dummy_slot *dslot)
{
int retval;
dbg("removing slot %s\n", hotplug_slot_name(dslot->slot));
retval = pci_hp_deregister(dslot->slot);
if (retval)
err("Problem unregistering a slot %s\n",
hotplug_slot_name(dslot->slot));
}
/* called from the single-threaded workqueue handler to remove a slot */
static void remove_slot_worker(struct work_struct *work)
{
struct dummy_slot *dslot =
container_of(work, struct dummy_slot, remove_work);
remove_slot(dslot);
}
/**
* pci_rescan_slot - Rescan slot
* @temp: Device template. Should be set: bus and devfn.
*
* Tries hard not to re-enable already existing devices;
* also handles scanning of subfunctions.
*/
static int pci_rescan_slot(struct pci_dev *temp)
{
struct pci_bus *bus = temp->bus;
struct pci_dev *dev;
int func;
u8 hdr_type;
int count = 0;
if (!pci_read_config_byte(temp, PCI_HEADER_TYPE, &hdr_type)) {
temp->hdr_type = hdr_type & 0x7f;
if ((dev = pci_get_slot(bus, temp->devfn)) != NULL)
pci_dev_put(dev);
else {
dev = pci_scan_single_device(bus, temp->devfn);
if (dev) {
dbg("New device on %s function %x:%x\n",
bus->name, temp->devfn >> 3,
temp->devfn & 7);
count++;
}
}
/* multifunction device? */
if (!(hdr_type & 0x80))
return count;
/* continue scanning for other functions */
for (func = 1, temp->devfn++; func < 8; func++, temp->devfn++) {
if (pci_read_config_byte(temp, PCI_HEADER_TYPE, &hdr_type))
continue;
temp->hdr_type = hdr_type & 0x7f;
if ((dev = pci_get_slot(bus, temp->devfn)) != NULL)
pci_dev_put(dev);
else {
dev = pci_scan_single_device(bus, temp->devfn);
if (dev) {
dbg("New device on %s function %x:%x\n",
bus->name, temp->devfn >> 3,
temp->devfn & 7);
count++;
}
}
}
}
return count;
}
/**
* pci_rescan_bus - Rescan PCI bus
* @bus: the PCI bus to rescan
*
* Call pci_rescan_slot for each possible function of the bus.
*/
static void pci_rescan_bus(const struct pci_bus *bus)
{
unsigned int devfn;
struct pci_dev *dev;
int retval;
int found = 0;
dev = alloc_pci_dev();
if (!dev)
return;
dev->bus = (struct pci_bus*)bus;
dev->sysdata = bus->sysdata;
for (devfn = 0; devfn < 0x100; devfn += 8) {
dev->devfn = devfn;
found += pci_rescan_slot(dev);
}
if (found) {
pci_bus_assign_resources(bus);
list_for_each_entry(dev, &bus->devices, bus_list) {
/* Skip already-added devices */
if (dev->is_added)
continue;
retval = pci_bus_add_device(dev);
if (retval)
dev_err(&dev->dev,
"Error adding device, continuing\n");
else
add_slot(dev);
}
pci_bus_add_devices(bus);
}
kfree(dev);
}
/* recursively scan all buses */
static void pci_rescan_buses(const struct list_head *list)
{
const struct list_head *l;
list_for_each(l,list) {
const struct pci_bus *b = pci_bus_b(l);
pci_rescan_bus(b);
pci_rescan_buses(&b->children);
}
}
/* initiate rescan of all pci buses */
static inline void pci_rescan(void) {
pci_rescan_buses(&pci_root_buses);
}
/* called from the single-threaded workqueue handler to rescan all pci buses */
static void pci_rescan_worker(struct work_struct *work)
{
pci_rescan();
}
static int enable_slot(struct hotplug_slot *hotplug_slot)
{
/* mis-use enable_slot for rescanning of the pci bus */
cancel_work_sync(&pci_rescan_work);
queue_work(dummyphp_wq, &pci_rescan_work);
return 0;
}
static int disable_slot(struct hotplug_slot *slot)
{
struct dummy_slot *dslot;
struct pci_dev *dev;
int func;
struct legacy_slot *slot = kzalloc(sizeof(*slot), GFP_KERNEL);
if (!slot)
return -ENODEV;
dslot = slot->private;
dbg("%s - physical_slot = %s\n", __func__, hotplug_slot_name(slot));
for (func = 7; func >= 0; func--) {
dev = pci_get_slot(dslot->dev->bus, dslot->dev->devfn + func);
if (!dev)
continue;
if (test_and_set_bit(0, &dslot->removed)) {
dbg("Slot already scheduled for removal\n");
pci_dev_put(dev);
return -ENODEV;
}
/* remove the device from the pci core */
pci_remove_bus_device(dev);
/* queue work item to blow away this sysfs entry and other
* parts.
*/
INIT_WORK(&dslot->remove_work, remove_slot_worker);
queue_work(dummyphp_wq, &dslot->remove_work);
pci_dev_put(dev);
}
return 0;
}
static void cleanup_slots (void)
{
struct list_head *tmp;
struct list_head *next;
struct dummy_slot *dslot;
destroy_workqueue(dummyphp_wq);
list_for_each_safe (tmp, next, &slot_list) {
dslot = list_entry (tmp, struct dummy_slot, node);
remove_slot(dslot);
}
}
static int __init dummyphp_init(void)
{
info(DRIVER_DESC "\n");
dummyphp_wq = create_singlethread_workqueue(MY_NAME);
if (!dummyphp_wq)
return -ENOMEM;
return pci_scan_buses();
if (kobject_init_and_add(&slot->kobj, &legacy_ktype,
&pci_slots_kset->kobj, "%s",
dev_name(&pdev->dev))) {
dev_warn(&pdev->dev, "Failed to created legacy fake slot\n");
return -EINVAL;
}
slot->dev = pci_dev_get(pdev);
list_add(&slot->list, &legacy_list);
return 0;
}
static void __exit dummyphp_exit(void)
static int legacy_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
cleanup_slots();
struct pci_dev *pdev = to_pci_dev(data);
if (action == BUS_NOTIFY_ADD_DEVICE) {
legacy_add_slot(pdev);
} else if (action == BUS_NOTIFY_DEL_DEVICE) {
struct legacy_slot *slot;
list_for_each_entry(slot, &legacy_list, list)
if (slot->dev == pdev)
goto found;
dev_warn(&pdev->dev, "Missing legacy fake slot?");
return -ENODEV;
found:
kobject_del(&slot->kobj);
list_del(&slot->list);
kobject_put(&slot->kobj);
}
return 0;
}
module_init(dummyphp_init);
module_exit(dummyphp_exit);
static struct notifier_block legacy_notifier = {
.notifier_call = legacy_notify
};
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
static int __init init_legacy(void)
{
struct pci_dev *pdev = NULL;
/* Add existing devices */
while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)))
legacy_add_slot(pdev);
/* Be alerted of any new ones */
bus_register_notifier(&pci_bus_type, &legacy_notifier);
return 0;
}
module_init(init_legacy);
static void __exit remove_legacy(void)
{
struct legacy_slot *slot, *tmp;
bus_unregister_notifier(&pci_bus_type, &legacy_notifier);
list_for_each_entry_safe(slot, tmp, &legacy_list, list) {
list_del(&slot->list);
kobject_del(&slot->kobj);
kobject_put(&slot->kobj);
}
}
module_exit(remove_legacy);
MODULE_AUTHOR("Trent Piepho <xyzzy@speakeasy.org>");
MODULE_DESCRIPTION("Legacy version of the fakephp interface");
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
module_param(dup_slots, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dup_slots, "Force duplicate slot names for debugging");

13
drivers/pci/hotplug/pciehp.h
Просмотреть файл

@ -46,10 +46,10 @@ extern int pciehp_force;
extern struct workqueue_struct *pciehp_wq;
#define dbg(format, arg...) \
do { \
if (pciehp_debug) \
printk("%s: " format, MY_NAME , ## arg); \
} while (0)
do { \
if (pciehp_debug) \
printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \
} while (0)
#define err(format, arg...) \
printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
#define info(format, arg...) \
@ -60,7 +60,7 @@ extern struct workqueue_struct *pciehp_wq;
#define ctrl_dbg(ctrl, format, arg...) \
do { \
if (pciehp_debug) \
dev_printk(, &ctrl->pcie->device, \
dev_printk(KERN_DEBUG, &ctrl->pcie->device, \
format, ## arg); \
} while (0)
#define ctrl_err(ctrl, format, arg...) \
@ -108,10 +108,11 @@ struct controller {
u32 slot_cap;
u8 cap_base;
struct timer_list poll_timer;
int cmd_busy;
unsigned int cmd_busy:1;
unsigned int no_cmd_complete:1;
unsigned int link_active_reporting:1;
unsigned int notification_enabled:1;
unsigned int power_fault_detected;
};
#define INT_BUTTON_IGNORE 0

21
drivers/pci/hotplug/pciehp_acpi.c
Просмотреть файл

@ -67,37 +67,27 @@ static int __init parse_detect_mode(void)
return PCIEHP_DETECT_DEFAULT;
}
static struct pcie_port_service_id __initdata port_pci_ids[] = {
{
.vendor = PCI_ANY_ID,
.device = PCI_ANY_ID,
.port_type = PCIE_ANY_PORT,
.service_type = PCIE_PORT_SERVICE_HP,
.driver_data = 0,
}, { /* end: all zeroes */ }
};
static int __initdata dup_slot_id;
static int __initdata acpi_slot_detected;
static struct list_head __initdata dummy_slots = LIST_HEAD_INIT(dummy_slots);
/* Dummy driver for dumplicate name detection */
static int __init dummy_probe(struct pcie_device *dev,
const struct pcie_port_service_id *id)
static int __init dummy_probe(struct pcie_device *dev)
{
int pos;
u32 slot_cap;
struct slot *slot, *tmp;
struct pci_dev *pdev = dev->port;
struct pci_bus *pbus = pdev->subordinate;
if (!(slot = kzalloc(sizeof(*slot), GFP_KERNEL)))
return -ENOMEM;
/* Note: pciehp_detect_mode != PCIEHP_DETECT_ACPI here */
if (pciehp_get_hp_hw_control_from_firmware(pdev))
return -ENODEV;
if (!(pos = pci_find_capability(pdev, PCI_CAP_ID_EXP)))
return -ENODEV;
pci_read_config_dword(pdev, pos + PCI_EXP_SLTCAP, &slot_cap);
slot = kzalloc(sizeof(*slot), GFP_KERNEL);
if (!slot)
return -ENOMEM;
slot->number = slot_cap >> 19;
list_for_each_entry(tmp, &dummy_slots, slot_list) {
if (tmp->number == slot->number)
@ -111,7 +101,8 @@ static int __init dummy_probe(struct pcie_device *dev,
static struct pcie_port_service_driver __initdata dummy_driver = {
.name = "pciehp_dummy",
.id_table = port_pci_ids,
.port_type = PCIE_ANY_PORT,
.service = PCIE_PORT_SERVICE_HP,
.probe = dummy_probe,
};

18
drivers/pci/hotplug/pciehp_core.c
Просмотреть файл

@ -401,7 +401,7 @@ static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_spe
return 0;
}
static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_id *id)
static int pciehp_probe(struct pcie_device *dev)
{
int rc;
struct controller *ctrl;
@ -475,7 +475,7 @@ static void pciehp_remove (struct pcie_device *dev)
}
#ifdef CONFIG_PM
static int pciehp_suspend (struct pcie_device *dev, pm_message_t state)
static int pciehp_suspend (struct pcie_device *dev)
{
dev_info(&dev->device, "%s ENTRY\n", __func__);
return 0;
@ -503,20 +503,12 @@ static int pciehp_resume (struct pcie_device *dev)
}
return 0;
}
#endif
static struct pcie_port_service_id port_pci_ids[] = { {
.vendor = PCI_ANY_ID,
.device = PCI_ANY_ID,
.port_type = PCIE_ANY_PORT,
.service_type = PCIE_PORT_SERVICE_HP,
.driver_data = 0,
}, { /* end: all zeroes */ }
};
#endif /* PM */
static struct pcie_port_service_driver hpdriver_portdrv = {
.name = PCIE_MODULE_NAME,
.id_table = &port_pci_ids[0],
.port_type = PCIE_ANY_PORT,
.service = PCIE_PORT_SERVICE_HP,
.probe = pciehp_probe,
.remove = pciehp_remove,

34
drivers/pci/hotplug/pciehp_hpc.c
Просмотреть файл

@ -548,23 +548,21 @@ static int hpc_power_on_slot(struct slot * slot)
slot_cmd = POWER_ON;
cmd_mask = PCI_EXP_SLTCTL_PCC;
/* Enable detection that we turned off at slot power-off time */
if (!pciehp_poll_mode) {
slot_cmd |= (PCI_EXP_SLTCTL_PFDE | PCI_EXP_SLTCTL_MRLSCE |
PCI_EXP_SLTCTL_PDCE);
cmd_mask |= (PCI_EXP_SLTCTL_PFDE | PCI_EXP_SLTCTL_MRLSCE |
PCI_EXP_SLTCTL_PDCE);
/* Enable power fault detection turned off at power off time */
slot_cmd |= PCI_EXP_SLTCTL_PFDE;
cmd_mask |= PCI_EXP_SLTCTL_PFDE;
}
retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
if (retval) {
ctrl_err(ctrl, "Write %x command failed!\n", slot_cmd);
return -1;
return retval;
}
ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n",
__func__, ctrl->cap_base + PCI_EXP_SLTCTL, slot_cmd);
ctrl->power_fault_detected = 0;
return retval;
}
@ -621,18 +619,10 @@ static int hpc_power_off_slot(struct slot * slot)
slot_cmd = POWER_OFF;
cmd_mask = PCI_EXP_SLTCTL_PCC;
/*
* If we get MRL or presence detect interrupts now, the isr
* will notice the sticky power-fault bit too and issue power
* indicator change commands. This will lead to an endless loop
* of command completions, since the power-fault bit remains on
* till the slot is powered on again.
*/
if (!pciehp_poll_mode) {
slot_cmd &= ~(PCI_EXP_SLTCTL_PFDE | PCI_EXP_SLTCTL_MRLSCE |
PCI_EXP_SLTCTL_PDCE);
cmd_mask |= (PCI_EXP_SLTCTL_PFDE | PCI_EXP_SLTCTL_MRLSCE |
PCI_EXP_SLTCTL_PDCE);
/* Disable power fault detection */
slot_cmd &= ~PCI_EXP_SLTCTL_PFDE;
cmd_mask |= PCI_EXP_SLTCTL_PFDE;
}
retval = pcie_write_cmd(ctrl, slot_cmd, cmd_mask);
@ -672,10 +662,11 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
detected &= (PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD |
PCI_EXP_SLTSTA_MRLSC | PCI_EXP_SLTSTA_PDC |
PCI_EXP_SLTSTA_CC);
detected &= ~intr_loc;
intr_loc |= detected;
if (!intr_loc)
return IRQ_NONE;
if (detected && pciehp_writew(ctrl, PCI_EXP_SLTSTA, detected)) {
if (detected && pciehp_writew(ctrl, PCI_EXP_SLTSTA, intr_loc)) {
ctrl_err(ctrl, "%s: Cannot write to SLOTSTATUS\n",
__func__);
return IRQ_NONE;
@ -709,9 +700,10 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
pciehp_handle_presence_change(p_slot);
/* Check Power Fault Detected */
if (intr_loc & PCI_EXP_SLTSTA_PFD)
if ((intr_loc & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
ctrl->power_fault_detected = 1;
pciehp_handle_power_fault(p_slot);
}
return IRQ_HANDLED;
}

10
drivers/pci/hotplug/shpchp.h
Просмотреть файл

@ -48,10 +48,10 @@ extern int shpchp_debug;
extern struct workqueue_struct *shpchp_wq;
#define dbg(format, arg...) \
do { \
if (shpchp_debug) \
printk("%s: " format, MY_NAME , ## arg); \
} while (0)
do { \
if (shpchp_debug) \
printk(KERN_DEBUG "%s: " format, MY_NAME , ## arg); \
} while (0)
#define err(format, arg...) \
printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
#define info(format, arg...) \
@ -62,7 +62,7 @@ extern struct workqueue_struct *shpchp_wq;
#define ctrl_dbg(ctrl, format, arg...) \
do { \
if (shpchp_debug) \
dev_printk(, &ctrl->pci_dev->dev, \
dev_printk(KERN_DEBUG, &ctrl->pci_dev->dev, \
format, ## arg); \
} while (0)
#define ctrl_err(ctrl, format, arg...) \

2
drivers/pci/hotplug/shpchp_pci.c
Просмотреть файл

@ -137,7 +137,7 @@ int __ref shpchp_configure_device(struct slot *p_slot)
busnr))
break;
}
if (busnr >= end) {
if (busnr > end) {
ctrl_err(ctrl,
"No free bus for hot-added bridge\n");
pci_dev_put(dev);

2
drivers/pci/intel-iommu.c
Просмотреть файл

@ -1782,7 +1782,7 @@ static inline void iommu_prepare_isa(void)
ret = iommu_prepare_identity_map(pdev, 0, 16*1024*1024);
if (ret)
printk("IOMMU: Failed to create 0-64M identity map, "
printk(KERN_ERR "IOMMU: Failed to create 0-64M identity map, "
"floppy might not work\n");
}

680
drivers/pci/iov.c Normal file
Просмотреть файл

@ -0,0 +1,680 @@
/*
* drivers/pci/iov.c
*
* Copyright (C) 2009 Intel Corporation, Yu Zhao <yu.zhao@intel.com>
*
* PCI Express I/O Virtualization (IOV) support.
* Single Root IOV 1.0
*/
#include <linux/pci.h>
#include <linux/mutex.h>
#include <linux/string.h>
#include <linux/delay.h>
#include "pci.h"
#define VIRTFN_ID_LEN 16
static inline u8 virtfn_bus(struct pci_dev *dev, int id)
{
return dev->bus->number + ((dev->devfn + dev->sriov->offset +
dev->sriov->stride * id) >> 8);
}
static inline u8 virtfn_devfn(struct pci_dev *dev, int id)
{
return (dev->devfn + dev->sriov->offset +
dev->sriov->stride * id) & 0xff;
}
static struct pci_bus *virtfn_add_bus(struct pci_bus *bus, int busnr)
{
int rc;
struct pci_bus *child;
if (bus->number == busnr)
return bus;
child = pci_find_bus(pci_domain_nr(bus), busnr);
if (child)
return child;
child = pci_add_new_bus(bus, NULL, busnr);
if (!child)
return NULL;
child->subordinate = busnr;
child->dev.parent = bus->bridge;
rc = pci_bus_add_child(child);
if (rc) {
pci_remove_bus(child);
return NULL;
}
return child;
}
static void virtfn_remove_bus(struct pci_bus *bus, int busnr)
{
struct pci_bus *child;
if (bus->number == busnr)
return;
child = pci_find_bus(pci_domain_nr(bus), busnr);
BUG_ON(!child);
if (list_empty(&child->devices))
pci_remove_bus(child);
}
static int virtfn_add(struct pci_dev *dev, int id, int reset)
{
int i;
int rc;
u64 size;
char buf[VIRTFN_ID_LEN];
struct pci_dev *virtfn;
struct resource *res;
struct pci_sriov *iov = dev->sriov;
virtfn = alloc_pci_dev();
if (!virtfn)
return -ENOMEM;
mutex_lock(&iov->dev->sriov->lock);
virtfn->bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id));
if (!virtfn->bus) {
kfree(virtfn);
mutex_unlock(&iov->dev->sriov->lock);
return -ENOMEM;
}
virtfn->devfn = virtfn_devfn(dev, id);
virtfn->vendor = dev->vendor;
pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_DID, &virtfn->device);
pci_setup_device(virtfn);
virtfn->dev.parent = dev->dev.parent;
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = dev->resource + PCI_IOV_RESOURCES + i;
if (!res->parent)
continue;
virtfn->resource[i].name = pci_name(virtfn);
virtfn->resource[i].flags = res->flags;
size = resource_size(res);
do_div(size, iov->total);
virtfn->resource[i].start = res->start + size * id;
virtfn->resource[i].end = virtfn->resource[i].start + size - 1;
rc = request_resource(res, &virtfn->resource[i]);
BUG_ON(rc);
}
if (reset)
pci_execute_reset_function(virtfn);
pci_device_add(virtfn, virtfn->bus);
mutex_unlock(&iov->dev->sriov->lock);
virtfn->physfn = pci_dev_get(dev);
virtfn->is_virtfn = 1;
rc = pci_bus_add_device(virtfn);
if (rc)
goto failed1;
sprintf(buf, "virtfn%u", id);
rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
if (rc)
goto failed1;
rc = sysfs_create_link(&virtfn->dev.kobj, &dev->dev.kobj, "physfn");
if (rc)
goto failed2;
kobject_uevent(&virtfn->dev.kobj, KOBJ_CHANGE);
return 0;
failed2:
sysfs_remove_link(&dev->dev.kobj, buf);
failed1:
pci_dev_put(dev);
mutex_lock(&iov->dev->sriov->lock);
pci_remove_bus_device(virtfn);
virtfn_remove_bus(dev->bus, virtfn_bus(dev, id));
mutex_unlock(&iov->dev->sriov->lock);
return rc;
}
static void virtfn_remove(struct pci_dev *dev, int id, int reset)
{
char buf[VIRTFN_ID_LEN];
struct pci_bus *bus;
struct pci_dev *virtfn;
struct pci_sriov *iov = dev->sriov;
bus = pci_find_bus(pci_domain_nr(dev->bus), virtfn_bus(dev, id));
if (!bus)
return;
virtfn = pci_get_slot(bus, virtfn_devfn(dev, id));
if (!virtfn)
return;
pci_dev_put(virtfn);
if (reset) {
device_release_driver(&virtfn->dev);
pci_execute_reset_function(virtfn);
}
sprintf(buf, "virtfn%u", id);
sysfs_remove_link(&dev->dev.kobj, buf);
sysfs_remove_link(&virtfn->dev.kobj, "physfn");
mutex_lock(&iov->dev->sriov->lock);
pci_remove_bus_device(virtfn);
virtfn_remove_bus(dev->bus, virtfn_bus(dev, id));
mutex_unlock(&iov->dev->sriov->lock);
pci_dev_put(dev);
}
static int sriov_migration(struct pci_dev *dev)
{
u16 status;
struct pci_sriov *iov = dev->sriov;
if (!iov->nr_virtfn)
return 0;
if (!(iov->cap & PCI_SRIOV_CAP_VFM))
return 0;
pci_read_config_word(dev, iov->pos + PCI_SRIOV_STATUS, &status);
if (!(status & PCI_SRIOV_STATUS_VFM))
return 0;
schedule_work(&iov->mtask);
return 1;
}
static void sriov_migration_task(struct work_struct *work)
{
int i;
u8 state;
u16 status;
struct pci_sriov *iov = container_of(work, struct pci_sriov, mtask);
for (i = iov->initial; i < iov->nr_virtfn; i++) {
state = readb(iov->mstate + i);
if (state == PCI_SRIOV_VFM_MI) {
writeb(PCI_SRIOV_VFM_AV, iov->mstate + i);
state = readb(iov->mstate + i);
if (state == PCI_SRIOV_VFM_AV)
virtfn_add(iov->self, i, 1);
} else if (state == PCI_SRIOV_VFM_MO) {
virtfn_remove(iov->self, i, 1);
writeb(PCI_SRIOV_VFM_UA, iov->mstate + i);
state = readb(iov->mstate + i);
if (state == PCI_SRIOV_VFM_AV)
virtfn_add(iov->self, i, 0);
}
}
pci_read_config_word(iov->self, iov->pos + PCI_SRIOV_STATUS, &status);
status &= ~PCI_SRIOV_STATUS_VFM;
pci_write_config_word(iov->self, iov->pos + PCI_SRIOV_STATUS, status);
}
static int sriov_enable_migration(struct pci_dev *dev, int nr_virtfn)
{
int bir;
u32 table;
resource_size_t pa;
struct pci_sriov *iov = dev->sriov;
if (nr_virtfn <= iov->initial)
return 0;
pci_read_config_dword(dev, iov->pos + PCI_SRIOV_VFM, &table);
bir = PCI_SRIOV_VFM_BIR(table);
if (bir > PCI_STD_RESOURCE_END)
return -EIO;
table = PCI_SRIOV_VFM_OFFSET(table);
if (table + nr_virtfn > pci_resource_len(dev, bir))
return -EIO;
pa = pci_resource_start(dev, bir) + table;
iov->mstate = ioremap(pa, nr_virtfn);
if (!iov->mstate)
return -ENOMEM;
INIT_WORK(&iov->mtask, sriov_migration_task);
iov->ctrl |= PCI_SRIOV_CTRL_VFM | PCI_SRIOV_CTRL_INTR;
pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
return 0;
}
static void sriov_disable_migration(struct pci_dev *dev)
{
struct pci_sriov *iov = dev->sriov;
iov->ctrl &= ~(PCI_SRIOV_CTRL_VFM | PCI_SRIOV_CTRL_INTR);
pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
cancel_work_sync(&iov->mtask);
iounmap(iov->mstate);
}
static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
{
int rc;
int i, j;
int nres;
u16 offset, stride, initial;
struct resource *res;
struct pci_dev *pdev;
struct pci_sriov *iov = dev->sriov;
if (!nr_virtfn)
return 0;
if (iov->nr_virtfn)
return -EINVAL;
pci_read_config_word(dev, iov->pos + PCI_SRIOV_INITIAL_VF, &initial);
if (initial > iov->total ||
(!(iov->cap & PCI_SRIOV_CAP_VFM) && (initial != iov->total)))
return -EIO;
if (nr_virtfn < 0 || nr_virtfn > iov->total ||
(!(iov->cap & PCI_SRIOV_CAP_VFM) && (nr_virtfn > initial)))
return -EINVAL;
pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, nr_virtfn);
pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_OFFSET, &offset);
pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_STRIDE, &stride);
if (!offset || (nr_virtfn > 1 && !stride))
return -EIO;
nres = 0;
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = dev->resource + PCI_IOV_RESOURCES + i;
if (res->parent)
nres++;
}
if (nres != iov->nres) {
dev_err(&dev->dev, "not enough MMIO resources for SR-IOV\n");
return -ENOMEM;
}
iov->offset = offset;
iov->stride = stride;
if (virtfn_bus(dev, nr_virtfn - 1) > dev->bus->subordinate) {
dev_err(&dev->dev, "SR-IOV: bus number out of range\n");
return -ENOMEM;
}
if (iov->link != dev->devfn) {
pdev = pci_get_slot(dev->bus, iov->link);
if (!pdev)
return -ENODEV;
pci_dev_put(pdev);
if (!pdev->is_physfn)
return -ENODEV;
rc = sysfs_create_link(&dev->dev.kobj,
&pdev->dev.kobj, "dep_link");
if (rc)
return rc;
}
iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE;
pci_block_user_cfg_access(dev);
pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
msleep(100);
pci_unblock_user_cfg_access(dev);
iov->initial = initial;
if (nr_virtfn < initial)
initial = nr_virtfn;
for (i = 0; i < initial; i++) {
rc = virtfn_add(dev, i, 0);
if (rc)
goto failed;
}
if (iov->cap & PCI_SRIOV_CAP_VFM) {
rc = sriov_enable_migration(dev, nr_virtfn);
if (rc)
goto failed;
}
kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE);
iov->nr_virtfn = nr_virtfn;
return 0;
failed:
for (j = 0; j < i; j++)
virtfn_remove(dev, j, 0);
iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
pci_block_user_cfg_access(dev);
pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
ssleep(1);
pci_unblock_user_cfg_access(dev);
if (iov->link != dev->devfn)
sysfs_remove_link(&dev->dev.kobj, "dep_link");
return rc;
}
static void sriov_disable(struct pci_dev *dev)
{
int i;
struct pci_sriov *iov = dev->sriov;
if (!iov->nr_virtfn)
return;
if (iov->cap & PCI_SRIOV_CAP_VFM)
sriov_disable_migration(dev);
for (i = 0; i < iov->nr_virtfn; i++)
virtfn_remove(dev, i, 0);
iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
pci_block_user_cfg_access(dev);
pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
ssleep(1);
pci_unblock_user_cfg_access(dev);
if (iov->link != dev->devfn)
sysfs_remove_link(&dev->dev.kobj, "dep_link");
iov->nr_virtfn = 0;
}
static int sriov_init(struct pci_dev *dev, int pos)
{
int i;
int rc;
int nres;
u32 pgsz;
u16 ctrl, total, offset, stride;
struct pci_sriov *iov;
struct resource *res;
struct pci_dev *pdev;
if (dev->pcie_type != PCI_EXP_TYPE_RC_END &&
dev->pcie_type != PCI_EXP_TYPE_ENDPOINT)
return -ENODEV;
pci_read_config_word(dev, pos + PCI_SRIOV_CTRL, &ctrl);
if (ctrl & PCI_SRIOV_CTRL_VFE) {
pci_write_config_word(dev, pos + PCI_SRIOV_CTRL, 0);
ssleep(1);
}
pci_read_config_word(dev, pos + PCI_SRIOV_TOTAL_VF, &total);
if (!total)
return 0;
ctrl = 0;
list_for_each_entry(pdev, &dev->bus->devices, bus_list)
if (pdev->is_physfn)
goto found;
pdev = NULL;
if (pci_ari_enabled(dev->bus))
ctrl |= PCI_SRIOV_CTRL_ARI;
found:
pci_write_config_word(dev, pos + PCI_SRIOV_CTRL, ctrl);
pci_write_config_word(dev, pos + PCI_SRIOV_NUM_VF, total);
pci_read_config_word(dev, pos + PCI_SRIOV_VF_OFFSET, &offset);
pci_read_config_word(dev, pos + PCI_SRIOV_VF_STRIDE, &stride);
if (!offset || (total > 1 && !stride))
return -EIO;
pci_read_config_dword(dev, pos + PCI_SRIOV_SUP_PGSIZE, &pgsz);
i = PAGE_SHIFT > 12 ? PAGE_SHIFT - 12 : 0;
pgsz &= ~((1 << i) - 1);
if (!pgsz)
return -EIO;
pgsz &= ~(pgsz - 1);
pci_write_config_dword(dev, pos + PCI_SRIOV_SYS_PGSIZE, pgsz);
nres = 0;
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = dev->resource + PCI_IOV_RESOURCES + i;
i += __pci_read_base(dev, pci_bar_unknown, res,
pos + PCI_SRIOV_BAR + i * 4);
if (!res->flags)
continue;
if (resource_size(res) & (PAGE_SIZE - 1)) {
rc = -EIO;
goto failed;
}
res->end = res->start + resource_size(res) * total - 1;
nres++;
}
iov = kzalloc(sizeof(*iov), GFP_KERNEL);
if (!iov) {
rc = -ENOMEM;
goto failed;
}
iov->pos = pos;
iov->nres = nres;
iov->ctrl = ctrl;
iov->total = total;
iov->offset = offset;
iov->stride = stride;
iov->pgsz = pgsz;
iov->self = dev;
pci_read_config_dword(dev, pos + PCI_SRIOV_CAP, &iov->cap);
pci_read_config_byte(dev, pos + PCI_SRIOV_FUNC_LINK, &iov->link);
if (pdev)
iov->dev = pci_dev_get(pdev);
else {
iov->dev = dev;
mutex_init(&iov->lock);
}
dev->sriov = iov;
dev->is_physfn = 1;
return 0;
failed:
for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
res = dev->resource + PCI_IOV_RESOURCES + i;
res->flags = 0;
}
return rc;
}
static void sriov_release(struct pci_dev *dev)
{
BUG_ON(dev->sriov->nr_virtfn);
if (dev == dev->sriov->dev)
mutex_destroy(&dev->sriov->lock);
else
pci_dev_put(dev->sriov->dev);
kfree(dev->sriov);
dev->sriov = NULL;
}
static void sriov_restore_state(struct pci_dev *dev)
{
int i;
u16 ctrl;
struct pci_sriov *iov = dev->sriov;
pci_read_config_word(dev, iov->pos + PCI_SRIOV_CTRL, &ctrl);
if (ctrl & PCI_SRIOV_CTRL_VFE)
return;
for (i = PCI_IOV_RESOURCES; i <= PCI_IOV_RESOURCE_END; i++)
pci_update_resource(dev, i);
pci_write_config_dword(dev, iov->pos + PCI_SRIOV_SYS_PGSIZE, iov->pgsz);
pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, iov->nr_virtfn);
pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
if (iov->ctrl & PCI_SRIOV_CTRL_VFE)
msleep(100);
}
/**
* pci_iov_init - initialize the IOV capability
* @dev: the PCI device
*
* Returns 0 on success, or negative on failure.
*/
int pci_iov_init(struct pci_dev *dev)
{
int pos;
if (!dev->is_pcie)
return -ENODEV;
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_SRIOV);
if (pos)
return sriov_init(dev, pos);
return -ENODEV;
}
/**
* pci_iov_release - release resources used by the IOV capability
* @dev: the PCI device
*/
void pci_iov_release(struct pci_dev *dev)
{
if (dev->is_physfn)
sriov_release(dev);
}
/**
* pci_iov_resource_bar - get position of the SR-IOV BAR
* @dev: the PCI device
* @resno: the resource number
* @type: the BAR type to be filled in
*
* Returns position of the BAR encapsulated in the SR-IOV capability.
*/
int pci_iov_resource_bar(struct pci_dev *dev, int resno,
enum pci_bar_type *type)
{
if (resno < PCI_IOV_RESOURCES || resno > PCI_IOV_RESOURCE_END)
return 0;
BUG_ON(!dev->is_physfn);
*type = pci_bar_unknown;
return dev->sriov->pos + PCI_SRIOV_BAR +
4 * (resno - PCI_IOV_RESOURCES);
}
/**
* pci_restore_iov_state - restore the state of the IOV capability
* @dev: the PCI device
*/
void pci_restore_iov_state(struct pci_dev *dev)
{
if (dev->is_physfn)
sriov_restore_state(dev);
}
/**
* pci_iov_bus_range - find bus range used by Virtual Function
* @bus: the PCI bus
*
* Returns max number of buses (exclude current one) used by Virtual
* Functions.
*/
int pci_iov_bus_range(struct pci_bus *bus)
{
int max = 0;
u8 busnr;
struct pci_dev *dev;
list_for_each_entry(dev, &bus->devices, bus_list) {
if (!dev->is_physfn)
continue;
busnr = virtfn_bus(dev, dev->sriov->total - 1);
if (busnr > max)
max = busnr;
}
return max ? max - bus->number : 0;
}
/**
* pci_enable_sriov - enable the SR-IOV capability
* @dev: the PCI device
*
* Returns 0 on success, or negative on failure.
*/
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{
might_sleep();
if (!dev->is_physfn)
return -ENODEV;
return sriov_enable(dev, nr_virtfn);
}
EXPORT_SYMBOL_GPL(pci_enable_sriov);
/**
* pci_disable_sriov - disable the SR-IOV capability
* @dev: the PCI device
*/
void pci_disable_sriov(struct pci_dev *dev)
{
might_sleep();
if (!dev->is_physfn)
return;
sriov_disable(dev);
}
EXPORT_SYMBOL_GPL(pci_disable_sriov);
/**
* pci_sriov_migration - notify SR-IOV core of Virtual Function Migration
* @dev: the PCI device
*
* Returns IRQ_HANDLED if the IRQ is handled, or IRQ_NONE if not.
*
* Physical Function driver is responsible to register IRQ handler using
* VF Migration Interrupt Message Number, and call this function when the
* interrupt is generated by the hardware.
*/
irqreturn_t pci_sriov_migration(struct pci_dev *dev)
{
if (!dev->is_physfn)
return IRQ_NONE;
return sriov_migration(dev) ? IRQ_HANDLED : IRQ_NONE;
}
EXPORT_SYMBOL_GPL(pci_sriov_migration);

420
drivers/pci/msi.c
Просмотреть файл

@ -27,48 +27,53 @@ static int pci_msi_enable = 1;
/* Arch hooks */
int __attribute__ ((weak))
arch_msi_check_device(struct pci_dev *dev, int nvec, int type)
#ifndef arch_msi_check_device
int arch_msi_check_device(struct pci_dev *dev, int nvec, int type)
{
return 0;
}
#endif
int __attribute__ ((weak))
arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *entry)
{
return 0;
}
int __attribute__ ((weak))
arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
#ifndef arch_setup_msi_irqs
int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
{
struct msi_desc *entry;
int ret;
/*
* If an architecture wants to support multiple MSI, it needs to
* override arch_setup_msi_irqs()
*/
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
list_for_each_entry(entry, &dev->msi_list, list) {
ret = arch_setup_msi_irq(dev, entry);
if (ret)
if (ret < 0)
return ret;
if (ret > 0)
return -ENOSPC;
}
return 0;
}
#endif
void __attribute__ ((weak)) arch_teardown_msi_irq(unsigned int irq)
{
return;
}
void __attribute__ ((weak))
arch_teardown_msi_irqs(struct pci_dev *dev)
#ifndef arch_teardown_msi_irqs
void arch_teardown_msi_irqs(struct pci_dev *dev)
{
struct msi_desc *entry;
list_for_each_entry(entry, &dev->msi_list, list) {
if (entry->irq != 0)
arch_teardown_msi_irq(entry->irq);
int i, nvec;
if (entry->irq == 0)
continue;
nvec = 1 << entry->msi_attrib.multiple;
for (i = 0; i < nvec; i++)
arch_teardown_msi_irq(entry->irq + i);
}
}
#endif
static void __msi_set_enable(struct pci_dev *dev, int pos, int enable)
{
@ -111,27 +116,14 @@ static inline __attribute_const__ u32 msi_mask(unsigned x)
return (1 << (1 << x)) - 1;
}
static void msix_flush_writes(struct irq_desc *desc)
static inline __attribute_const__ u32 msi_capable_mask(u16 control)
{
struct msi_desc *entry;
return msi_mask((control >> 1) & 7);
}
entry = get_irq_desc_msi(desc);
BUG_ON(!entry || !entry->dev);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
/* nothing to do */
break;
case PCI_CAP_ID_MSIX:
{
int offset = entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET;
readl(entry->mask_base + offset);
break;
}
default:
BUG();
break;
}
static inline __attribute_const__ u32 msi_enabled_mask(u16 control)
{
return msi_mask((control >> 4) & 7);
}
/*
@ -143,49 +135,71 @@ static void msix_flush_writes(struct irq_desc *desc)
* Returns 1 if it succeeded in masking the interrupt and 0 if the device
* doesn't support MSI masking.
*/
static int msi_set_mask_bits(struct irq_desc *desc, u32 mask, u32 flag)
static void msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag)
{
struct msi_desc *entry;
u32 mask_bits = desc->masked;
entry = get_irq_desc_msi(desc);
BUG_ON(!entry || !entry->dev);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
if (entry->msi_attrib.maskbit) {
int pos;
u32 mask_bits;
if (!desc->msi_attrib.maskbit)
return;
pos = (long)entry->mask_base;
pci_read_config_dword(entry->dev, pos, &mask_bits);
mask_bits &= ~(mask);
mask_bits |= flag & mask;
pci_write_config_dword(entry->dev, pos, mask_bits);
} else {
return 0;
}
break;
case PCI_CAP_ID_MSIX:
{
int offset = entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET;
writel(flag, entry->mask_base + offset);
readl(entry->mask_base + offset);
break;
mask_bits &= ~mask;
mask_bits |= flag;
pci_write_config_dword(desc->dev, desc->mask_pos, mask_bits);
desc->masked = mask_bits;
}
/*
* This internal function does not flush PCI writes to the device.
* All users must ensure that they read from the device before either
* assuming that the device state is up to date, or returning out of this
* file. This saves a few milliseconds when initialising devices with lots
* of MSI-X interrupts.
*/
static void msix_mask_irq(struct msi_desc *desc, u32 flag)
{
u32 mask_bits = desc->masked;
unsigned offset = desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET;
mask_bits &= ~1;
mask_bits |= flag;
writel(mask_bits, desc->mask_base + offset);
desc->masked = mask_bits;
}
static void msi_set_mask_bit(unsigned irq, u32 flag)
{
struct msi_desc *desc = get_irq_msi(irq);
if (desc->msi_attrib.is_msix) {
msix_mask_irq(desc, flag);
readl(desc->mask_base); /* Flush write to device */
} else {
unsigned offset = irq - desc->dev->irq;
msi_mask_irq(desc, 1 << offset, flag << offset);
}
default:
BUG();
break;
}
entry->msi_attrib.masked = !!flag;
return 1;
}
void mask_msi_irq(unsigned int irq)
{
msi_set_mask_bit(irq, 1);
}
void unmask_msi_irq(unsigned int irq)
{
msi_set_mask_bit(irq, 0);
}
void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_desc_msi(desc);
switch(entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
{
if (entry->msi_attrib.is_msix) {
void __iomem *base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
msg->address_lo = readl(base + PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET);
msg->address_hi = readl(base + PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET);
msg->data = readl(base + PCI_MSIX_ENTRY_DATA_OFFSET);
} else {
struct pci_dev *dev = entry->dev;
int pos = entry->msi_attrib.pos;
u16 data;
@ -201,21 +215,6 @@ void read_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
pci_read_config_word(dev, msi_data_reg(pos, 0), &data);
}
msg->data = data;
break;
}
case PCI_CAP_ID_MSIX:
{
void __iomem *base;
base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
msg->address_lo = readl(base + PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET);
msg->address_hi = readl(base + PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET);
msg->data = readl(base + PCI_MSIX_ENTRY_DATA_OFFSET);
break;
}
default:
BUG();
}
}
@ -229,11 +228,25 @@ void read_msi_msg(unsigned int irq, struct msi_msg *msg)
void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
{
struct msi_desc *entry = get_irq_desc_msi(desc);
switch (entry->msi_attrib.type) {
case PCI_CAP_ID_MSI:
{
if (entry->msi_attrib.is_msix) {
void __iomem *base;
base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
writel(msg->address_lo,
base + PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET);
writel(msg->address_hi,
base + PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET);
writel(msg->data, base + PCI_MSIX_ENTRY_DATA_OFFSET);
} else {
struct pci_dev *dev = entry->dev;
int pos = entry->msi_attrib.pos;
u16 msgctl;
pci_read_config_word(dev, msi_control_reg(pos), &msgctl);
msgctl &= ~PCI_MSI_FLAGS_QSIZE;
msgctl |= entry->msi_attrib.multiple << 4;
pci_write_config_word(dev, msi_control_reg(pos), msgctl);
pci_write_config_dword(dev, msi_lower_address_reg(pos),
msg->address_lo);
@ -246,23 +259,6 @@ void write_msi_msg_desc(struct irq_desc *desc, struct msi_msg *msg)
pci_write_config_word(dev, msi_data_reg(pos, 0),
msg->data);
}
break;
}
case PCI_CAP_ID_MSIX:
{
void __iomem *base;
base = entry->mask_base +
entry->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
writel(msg->address_lo,
base + PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET);
writel(msg->address_hi,
base + PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET);
writel(msg->data, base + PCI_MSIX_ENTRY_DATA_OFFSET);
break;
}
default:
BUG();
}
entry->msg = *msg;
}
@ -274,37 +270,18 @@ void write_msi_msg(unsigned int irq, struct msi_msg *msg)
write_msi_msg_desc(desc, msg);
}
void mask_msi_irq(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
msi_set_mask_bits(desc, 1, 1);
msix_flush_writes(desc);
}
void unmask_msi_irq(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
msi_set_mask_bits(desc, 1, 0);
msix_flush_writes(desc);
}
static int msi_free_irqs(struct pci_dev* dev);
static struct msi_desc* alloc_msi_entry(void)
static struct msi_desc *alloc_msi_entry(struct pci_dev *dev)
{
struct msi_desc *entry;
entry = kzalloc(sizeof(struct msi_desc), GFP_KERNEL);
if (!entry)
struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL);
if (!desc)
return NULL;
INIT_LIST_HEAD(&entry->list);
entry->irq = 0;
entry->dev = NULL;
INIT_LIST_HEAD(&desc->list);
desc->dev = dev;
return entry;
return desc;
}
static void pci_intx_for_msi(struct pci_dev *dev, int enable)
@ -328,15 +305,11 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
pci_intx_for_msi(dev, 0);
msi_set_enable(dev, 0);
write_msi_msg(dev->irq, &entry->msg);
if (entry->msi_attrib.maskbit) {
struct irq_desc *desc = irq_to_desc(dev->irq);
msi_set_mask_bits(desc, entry->msi_attrib.maskbits_mask,
entry->msi_attrib.masked);
}
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &control);
msi_mask_irq(entry, msi_capable_mask(control), entry->masked);
control &= ~PCI_MSI_FLAGS_QSIZE;
control |= PCI_MSI_FLAGS_ENABLE;
control |= (entry->msi_attrib.multiple << 4) | PCI_MSI_FLAGS_ENABLE;
pci_write_config_word(dev, pos + PCI_MSI_FLAGS, control);
}
@ -354,9 +327,8 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
msix_set_enable(dev, 0);
list_for_each_entry(entry, &dev->msi_list, list) {
struct irq_desc *desc = irq_to_desc(entry->irq);
write_msi_msg(entry->irq, &entry->msg);
msi_set_mask_bits(desc, 1, entry->msi_attrib.masked);
msix_mask_irq(entry, entry->masked);
}
BUG_ON(list_empty(&dev->msi_list));
@ -378,52 +350,48 @@ EXPORT_SYMBOL_GPL(pci_restore_msi_state);
/**
* msi_capability_init - configure device's MSI capability structure
* @dev: pointer to the pci_dev data structure of MSI device function
* @nvec: number of interrupts to allocate
*
* Setup the MSI capability structure of device function with a single
* MSI irq, regardless of device function is capable of handling
* multiple messages. A return of zero indicates the successful setup
* of an entry zero with the new MSI irq or non-zero for otherwise.
**/
static int msi_capability_init(struct pci_dev *dev)
* Setup the MSI capability structure of the device with the requested
* number of interrupts. A return value of zero indicates the successful
* setup of an entry with the new MSI irq. A negative return value indicates
* an error, and a positive return value indicates the number of interrupts
* which could have been allocated.
*/
static int msi_capability_init(struct pci_dev *dev, int nvec)
{
struct msi_desc *entry;
int pos, ret;
u16 control;
unsigned mask;
msi_set_enable(dev, 0); /* Ensure msi is disabled as I set it up */
pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
pci_read_config_word(dev, msi_control_reg(pos), &control);
/* MSI Entry Initialization */
entry = alloc_msi_entry();
entry = alloc_msi_entry(dev);
if (!entry)
return -ENOMEM;
entry->msi_attrib.type = PCI_CAP_ID_MSI;
entry->msi_attrib.is_msix = 0;
entry->msi_attrib.is_64 = is_64bit_address(control);
entry->msi_attrib.entry_nr = 0;
entry->msi_attrib.maskbit = is_mask_bit_support(control);
entry->msi_attrib.masked = 1;
entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
entry->msi_attrib.pos = pos;
entry->dev = dev;
if (entry->msi_attrib.maskbit) {
unsigned int base, maskbits, temp;
base = msi_mask_bits_reg(pos, entry->msi_attrib.is_64);
entry->mask_base = (void __iomem *)(long)base;
entry->mask_pos = msi_mask_bits_reg(pos, entry->msi_attrib.is_64);
/* All MSIs are unmasked by default, Mask them all */
if (entry->msi_attrib.maskbit)
pci_read_config_dword(dev, entry->mask_pos, &entry->masked);
mask = msi_capable_mask(control);
msi_mask_irq(entry, mask, mask);
/* All MSIs are unmasked by default, Mask them all */
pci_read_config_dword(dev, base, &maskbits);
temp = msi_mask((control & PCI_MSI_FLAGS_QMASK) >> 1);
maskbits |= temp;
pci_write_config_dword(dev, base, maskbits);
entry->msi_attrib.maskbits_mask = temp;
}
list_add_tail(&entry->list, &dev->msi_list);
/* Configure MSI capability structure */
ret = arch_setup_msi_irqs(dev, 1, PCI_CAP_ID_MSI);
ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
if (ret) {
msi_free_irqs(dev);
return ret;
@ -476,26 +444,28 @@ static int msix_capability_init(struct pci_dev *dev,
/* MSI-X Table Initialization */
for (i = 0; i < nvec; i++) {
entry = alloc_msi_entry();
entry = alloc_msi_entry(dev);
if (!entry)
break;
j = entries[i].entry;
entry->msi_attrib.type = PCI_CAP_ID_MSIX;
entry->msi_attrib.is_msix = 1;
entry->msi_attrib.is_64 = 1;
entry->msi_attrib.entry_nr = j;
entry->msi_attrib.maskbit = 1;
entry->msi_attrib.masked = 1;
entry->msi_attrib.default_irq = dev->irq;
entry->msi_attrib.pos = pos;
entry->dev = dev;
entry->mask_base = base;
entry->masked = readl(base + j * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
msix_mask_irq(entry, 1);
list_add_tail(&entry->list, &dev->msi_list);
}
ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
if (ret) {
if (ret < 0) {
/* If we had some success report the number of irqs
* we succeeded in setting up. */
int avail = 0;
list_for_each_entry(entry, &dev->msi_list, list) {
if (entry->irq != 0) {
@ -503,14 +473,13 @@ static int msix_capability_init(struct pci_dev *dev,
}
}
msi_free_irqs(dev);
if (avail != 0)
ret = avail;
}
/* If we had some success report the number of irqs
* we succeeded in setting up.
*/
if (avail == 0)
avail = ret;
return avail;
if (ret) {
msi_free_irqs(dev);
return ret;
}
i = 0;
@ -575,39 +544,54 @@ static int pci_msi_check_device(struct pci_dev* dev, int nvec, int type)
}
/**
* pci_enable_msi - configure device's MSI capability structure
* @dev: pointer to the pci_dev data structure of MSI device function
* pci_enable_msi_block - configure device's MSI capability structure
* @dev: device to configure
* @nvec: number of interrupts to configure
*
* Setup the MSI capability structure of device function with
* a single MSI irq upon its software driver call to request for
* MSI mode enabled on its hardware device function. A return of zero
* indicates the successful setup of an entry zero with the new MSI
* irq or non-zero for otherwise.
**/
int pci_enable_msi(struct pci_dev* dev)
* Allocate IRQs for a device with the MSI capability.
* This function returns a negative errno if an error occurs. If it
* is unable to allocate the number of interrupts requested, it returns
* the number of interrupts it might be able to allocate. If it successfully
* allocates at least the number of interrupts requested, it returns 0 and
* updates the @dev's irq member to the lowest new interrupt number; the
* other interrupt numbers allocated to this device are consecutive.
*/
int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
{
int status;
int status, pos, maxvec;
u16 msgctl;
status = pci_msi_check_device(dev, 1, PCI_CAP_ID_MSI);
pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
if (!pos)
return -EINVAL;
pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &msgctl);
maxvec = 1 << ((msgctl & PCI_MSI_FLAGS_QMASK) >> 1);
if (nvec > maxvec)
return maxvec;
status = pci_msi_check_device(dev, nvec, PCI_CAP_ID_MSI);
if (status)
return status;
WARN_ON(!!dev->msi_enabled);
/* Check whether driver already requested for MSI-X irqs */
/* Check whether driver already requested MSI-X irqs */
if (dev->msix_enabled) {
dev_info(&dev->dev, "can't enable MSI "
"(MSI-X already enabled)\n");
return -EINVAL;
}
status = msi_capability_init(dev);
status = msi_capability_init(dev, nvec);
return status;
}
EXPORT_SYMBOL(pci_enable_msi);
EXPORT_SYMBOL(pci_enable_msi_block);
void pci_msi_shutdown(struct pci_dev* dev)
void pci_msi_shutdown(struct pci_dev *dev)
{
struct msi_desc *entry;
struct msi_desc *desc;
u32 mask;
u16 ctrl;
if (!pci_msi_enable || !dev || !dev->msi_enabled)
return;
@ -617,19 +601,15 @@ void pci_msi_shutdown(struct pci_dev* dev)
dev->msi_enabled = 0;
BUG_ON(list_empty(&dev->msi_list));
entry = list_entry(dev->msi_list.next, struct msi_desc, list);
/* Return the the pci reset with msi irqs unmasked */
if (entry->msi_attrib.maskbit) {
u32 mask = entry->msi_attrib.maskbits_mask;
struct irq_desc *desc = irq_to_desc(dev->irq);
msi_set_mask_bits(desc, mask, ~mask);
}
if (!entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI)
return;
desc = list_first_entry(&dev->msi_list, struct msi_desc, list);
pci_read_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS, &ctrl);
mask = msi_capable_mask(ctrl);
msi_mask_irq(desc, mask, ~mask);
/* Restore dev->irq to its default pin-assertion irq */
dev->irq = entry->msi_attrib.default_irq;
dev->irq = desc->msi_attrib.default_irq;
}
void pci_disable_msi(struct pci_dev* dev)
{
struct msi_desc *entry;
@ -640,7 +620,7 @@ void pci_disable_msi(struct pci_dev* dev)
pci_msi_shutdown(dev);
entry = list_entry(dev->msi_list.next, struct msi_desc, list);
if (!entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI)
if (entry->msi_attrib.is_msix)
return;
msi_free_irqs(dev);
@ -652,14 +632,18 @@ static int msi_free_irqs(struct pci_dev* dev)
struct msi_desc *entry, *tmp;
list_for_each_entry(entry, &dev->msi_list, list) {
if (entry->irq)
BUG_ON(irq_has_action(entry->irq));
int i, nvec;
if (!entry->irq)
continue;
nvec = 1 << entry->msi_attrib.multiple;
for (i = 0; i < nvec; i++)
BUG_ON(irq_has_action(entry->irq + i));
}
arch_teardown_msi_irqs(dev);
list_for_each_entry_safe(entry, tmp, &dev->msi_list, list) {
if (entry->msi_attrib.type == PCI_CAP_ID_MSIX) {
if (entry->msi_attrib.is_msix) {
writel(1, entry->mask_base + entry->msi_attrib.entry_nr
* PCI_MSIX_ENTRY_SIZE
+ PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
@ -674,6 +658,23 @@ static int msi_free_irqs(struct pci_dev* dev)
return 0;
}
/**
* pci_msix_table_size - return the number of device's MSI-X table entries
* @dev: pointer to the pci_dev data structure of MSI-X device function
*/
int pci_msix_table_size(struct pci_dev *dev)
{
int pos;
u16 control;
pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
if (!pos)
return 0;
pci_read_config_word(dev, msi_control_reg(pos), &control);
return multi_msix_capable(control);
}
/**
* pci_enable_msix - configure device's MSI-X capability structure
* @dev: pointer to the pci_dev data structure of MSI-X device function
@ -691,9 +692,8 @@ static int msi_free_irqs(struct pci_dev* dev)
**/
int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
{
int status, pos, nr_entries;
int status, nr_entries;
int i, j;
u16 control;
if (!entries)
return -EINVAL;
@ -702,9 +702,7 @@ int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec)
if (status)
return status;
pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
pci_read_config_word(dev, msi_control_reg(pos), &control);
nr_entries = multi_msix_capable(control);
nr_entries = pci_msix_table_size(dev);
if (nvec > nr_entries)
return -EINVAL;

6
drivers/pci/msi.h
Просмотреть файл

@ -20,14 +20,8 @@
#define msi_mask_bits_reg(base, is64bit) \
( (is64bit == 1) ? base+PCI_MSI_MASK_BIT : base+PCI_MSI_MASK_BIT-4)
#define msi_disable(control) control &= ~PCI_MSI_FLAGS_ENABLE
#define multi_msi_capable(control) \
(1 << ((control & PCI_MSI_FLAGS_QMASK) >> 1))
#define multi_msi_enable(control, num) \
control |= (((num >> 1) << 4) & PCI_MSI_FLAGS_QSIZE);
#define is_64bit_address(control) (!!(control & PCI_MSI_FLAGS_64BIT))
#define is_mask_bit_support(control) (!!(control & PCI_MSI_FLAGS_MASKBIT))
#define msi_enable(control, num) multi_msi_enable(control, num); \
control |= PCI_MSI_FLAGS_ENABLE
#define msix_table_offset_reg(base) (base + 0x04)
#define msix_pba_offset_reg(base) (base + 0x08)

215
drivers/pci/pci-acpi.c
Просмотреть файл

@ -18,221 +18,6 @@
#include <linux/pci-acpi.h>
#include "pci.h"
struct acpi_osc_data {
acpi_handle handle;
u32 support_set;
u32 control_set;
u32 control_query;
int is_queried;
struct list_head sibiling;
};
static LIST_HEAD(acpi_osc_data_list);
struct acpi_osc_args {
u32 capbuf[3];
};
static DEFINE_MUTEX(pci_acpi_lock);
static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
{
struct acpi_osc_data *data;
list_for_each_entry(data, &acpi_osc_data_list, sibiling) {
if (data->handle == handle)
return data;
}
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return NULL;
INIT_LIST_HEAD(&data->sibiling);
data->handle = handle;
list_add_tail(&data->sibiling, &acpi_osc_data_list);
return data;
}
static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40,
0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
static acpi_status acpi_run_osc(acpi_handle handle,
struct acpi_osc_args *osc_args, u32 *retval)
{
acpi_status status;
struct acpi_object_list input;
union acpi_object in_params[4];
struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *out_obj;
u32 errors, flags = osc_args->capbuf[OSC_QUERY_TYPE];
/* Setting up input parameters */
input.count = 4;
input.pointer = in_params;
in_params[0].type = ACPI_TYPE_BUFFER;
in_params[0].buffer.length = 16;
in_params[0].buffer.pointer = OSC_UUID;
in_params[1].type = ACPI_TYPE_INTEGER;
in_params[1].integer.value = 1;
in_params[2].type = ACPI_TYPE_INTEGER;
in_params[2].integer.value = 3;
in_params[3].type = ACPI_TYPE_BUFFER;
in_params[3].buffer.length = 12;
in_params[3].buffer.pointer = (u8 *)osc_args->capbuf;
status = acpi_evaluate_object(handle, "_OSC", &input, &output);
if (ACPI_FAILURE(status))
return status;
if (!output.length)
return AE_NULL_OBJECT;
out_obj = output.pointer;
if (out_obj->type != ACPI_TYPE_BUFFER) {
printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");
status = AE_TYPE;
goto out_kfree;
}
/* Need to ignore the bit0 in result code */
errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
if (errors) {
if (errors & OSC_REQUEST_ERROR)
printk(KERN_DEBUG "_OSC request fails\n");
if (errors & OSC_INVALID_UUID_ERROR)
printk(KERN_DEBUG "_OSC invalid UUID\n");
if (errors & OSC_INVALID_REVISION_ERROR)
printk(KERN_DEBUG "_OSC invalid revision\n");
if (errors & OSC_CAPABILITIES_MASK_ERROR) {
if (flags & OSC_QUERY_ENABLE)
goto out_success;
printk(KERN_DEBUG "_OSC FW not grant req. control\n");
status = AE_SUPPORT;
goto out_kfree;
}
status = AE_ERROR;
goto out_kfree;
}
out_success:
*retval = *((u32 *)(out_obj->buffer.pointer + 8));
status = AE_OK;
out_kfree:
kfree(output.pointer);
return status;
}
static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data)
{
acpi_status status;
u32 support_set, result;
struct acpi_osc_args osc_args;
/* do _OSC query for all possible controls */
support_set = osc_data->support_set | (flags & OSC_SUPPORT_MASKS);
osc_args.capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
osc_args.capbuf[OSC_SUPPORT_TYPE] = support_set;
osc_args.capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
status = acpi_run_osc(osc_data->handle, &osc_args, &result);
if (ACPI_SUCCESS(status)) {
osc_data->support_set = support_set;
osc_data->control_query = result;
osc_data->is_queried = 1;
}
return status;
}
/*
* pci_acpi_osc_support: Invoke _OSC indicating support for the given feature
* @flags: Bitmask of flags to support
*
* See the ACPI spec for the definition of the flags
*/
int pci_acpi_osc_support(acpi_handle handle, u32 flags)
{
acpi_status status;
acpi_handle tmp;
struct acpi_osc_data *osc_data;
int rc = 0;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return -ENOTTY;
mutex_lock(&pci_acpi_lock);
osc_data = acpi_get_osc_data(handle);
if (!osc_data) {
printk(KERN_ERR "acpi osc data array is full\n");
rc = -ENOMEM;
goto out;
}
__acpi_query_osc(flags, osc_data);
out:
mutex_unlock(&pci_acpi_lock);
return rc;
}
/**
* pci_osc_control_set - commit requested control to Firmware
* @handle: acpi_handle for the target ACPI object
* @flags: driver's requested control bits
*
* Attempt to take control from Firmware on requested control bits.
**/
acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{
acpi_status status;
u32 control_req, control_set, result;
acpi_handle tmp;
struct acpi_osc_data *osc_data;
struct acpi_osc_args osc_args;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
mutex_lock(&pci_acpi_lock);
osc_data = acpi_get_osc_data(handle);
if (!osc_data) {
printk(KERN_ERR "acpi osc data array is full\n");
status = AE_ERROR;
goto out;
}
control_req = (flags & OSC_CONTROL_MASKS);
if (!control_req) {
status = AE_TYPE;
goto out;
}
/* No need to evaluate _OSC if the control was already granted. */
if ((osc_data->control_set & control_req) == control_req)
goto out;
if (!osc_data->is_queried) {
status = __acpi_query_osc(osc_data->support_set, osc_data);
if (ACPI_FAILURE(status))
goto out;
}
if ((osc_data->control_query & control_req) != control_req) {
status = AE_SUPPORT;
goto out;
}
control_set = osc_data->control_set | control_req;
osc_args.capbuf[OSC_QUERY_TYPE] = 0;
osc_args.capbuf[OSC_SUPPORT_TYPE] = osc_data->support_set;
osc_args.capbuf[OSC_CONTROL_TYPE] = control_set;
status = acpi_run_osc(handle, &osc_args, &result);
if (ACPI_SUCCESS(status))
osc_data->control_set = result;
out:
mutex_unlock(&pci_acpi_lock);
return status;
}
EXPORT_SYMBOL(pci_osc_control_set);
/*
* _SxD returns the D-state with the highest power
* (lowest D-state number) supported in the S-state "x".

81
drivers/pci/pci-driver.c
Просмотреть файл

@ -99,6 +99,52 @@ store_new_id(struct device_driver *driver, const char *buf, size_t count)
}
static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
/**
* store_remove_id - remove a PCI device ID from this driver
* @driver: target device driver
* @buf: buffer for scanning device ID data
* @count: input size
*
* Removes a dynamic pci device ID to this driver.
*/
static ssize_t
store_remove_id(struct device_driver *driver, const char *buf, size_t count)
{
struct pci_dynid *dynid, *n;
struct pci_driver *pdrv = to_pci_driver(driver);
__u32 vendor, device, subvendor = PCI_ANY_ID,
subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
int fields = 0;
int retval = -ENODEV;
fields = sscanf(buf, "%x %x %x %x %x %x",
&vendor, &device, &subvendor, &subdevice,
&class, &class_mask);
if (fields < 2)
return -EINVAL;
spin_lock(&pdrv->dynids.lock);
list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) {
struct pci_device_id *id = &dynid->id;
if ((id->vendor == vendor) &&
(id->device == device) &&
(subvendor == PCI_ANY_ID || id->subvendor == subvendor) &&
(subdevice == PCI_ANY_ID || id->subdevice == subdevice) &&
!((id->class ^ class) & class_mask)) {
list_del(&dynid->node);
kfree(dynid);
retval = 0;
break;
}
}
spin_unlock(&pdrv->dynids.lock);
if (retval)
return retval;
return count;
}
static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
static void
pci_free_dynids(struct pci_driver *drv)
{
@ -125,6 +171,20 @@ static void pci_remove_newid_file(struct pci_driver *drv)
{
driver_remove_file(&drv->driver, &driver_attr_new_id);
}
static int
pci_create_removeid_file(struct pci_driver *drv)
{
int error = 0;
if (drv->probe != NULL)
error = driver_create_file(&drv->driver,&driver_attr_remove_id);
return error;
}
static void pci_remove_removeid_file(struct pci_driver *drv)
{
driver_remove_file(&drv->driver, &driver_attr_remove_id);
}
#else /* !CONFIG_HOTPLUG */
static inline void pci_free_dynids(struct pci_driver *drv) {}
static inline int pci_create_newid_file(struct pci_driver *drv)
@ -132,6 +192,11 @@ static inline int pci_create_newid_file(struct pci_driver *drv)
return 0;
}
static inline void pci_remove_newid_file(struct pci_driver *drv) {}
static inline int pci_create_removeid_file(struct pci_driver *drv)
{
return 0;
}
static inline void pci_remove_removeid_file(struct pci_driver *drv) {}
#endif
/**
@ -899,13 +964,23 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
/* register with core */
error = driver_register(&drv->driver);
if (error)
return error;
goto out;
error = pci_create_newid_file(drv);
if (error)
driver_unregister(&drv->driver);
goto out_newid;
error = pci_create_removeid_file(drv);
if (error)
goto out_removeid;
out:
return error;
out_removeid:
pci_remove_newid_file(drv);
out_newid:
driver_unregister(&drv->driver);
goto out;
}
/**
@ -921,6 +996,7 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
void
pci_unregister_driver(struct pci_driver *drv)
{
pci_remove_removeid_file(drv);
pci_remove_newid_file(drv);
driver_unregister(&drv->driver);
pci_free_dynids(drv);
@ -1020,6 +1096,7 @@ struct bus_type pci_bus_type = {
.remove = pci_device_remove,
.shutdown = pci_device_shutdown,
.dev_attrs = pci_dev_attrs,
.bus_attrs = pci_bus_attrs,
.pm = PCI_PM_OPS_PTR,
};

124
drivers/pci/pci-sysfs.c
Просмотреть файл

@ -219,6 +219,83 @@ msi_bus_store(struct device *dev, struct device_attribute *attr,
return count;
}
#ifdef CONFIG_HOTPLUG
static DEFINE_MUTEX(pci_remove_rescan_mutex);
static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
size_t count)
{
unsigned long val;
struct pci_bus *b = NULL;
if (strict_strtoul(buf, 0, &val) < 0)
return -EINVAL;
if (val) {
mutex_lock(&pci_remove_rescan_mutex);
while ((b = pci_find_next_bus(b)) != NULL)
pci_rescan_bus(b);
mutex_unlock(&pci_remove_rescan_mutex);
}
return count;
}
struct bus_attribute pci_bus_attrs[] = {
__ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
__ATTR_NULL
};
static ssize_t
dev_rescan_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long val;
struct pci_dev *pdev = to_pci_dev(dev);
if (strict_strtoul(buf, 0, &val) < 0)
return -EINVAL;
if (val) {
mutex_lock(&pci_remove_rescan_mutex);
pci_rescan_bus(pdev->bus);
mutex_unlock(&pci_remove_rescan_mutex);
}
return count;
}
static void remove_callback(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
mutex_lock(&pci_remove_rescan_mutex);
pci_remove_bus_device(pdev);
mutex_unlock(&pci_remove_rescan_mutex);
}
static ssize_t
remove_store(struct device *dev, struct device_attribute *dummy,
const char *buf, size_t count)
{
int ret = 0;
unsigned long val;
struct pci_dev *pdev = to_pci_dev(dev);
if (strict_strtoul(buf, 0, &val) < 0)
return -EINVAL;
if (pci_is_root_bus(pdev->bus))
return -EBUSY;
/* An attribute cannot be unregistered by one of its own methods,
* so we have to use this roundabout approach.
*/
if (val)
ret = device_schedule_callback(dev, remove_callback);
if (ret)
count = ret;
return count;
}
#endif
struct device_attribute pci_dev_attrs[] = {
__ATTR_RO(resource),
__ATTR_RO(vendor),
@ -237,9 +314,24 @@ struct device_attribute pci_dev_attrs[] = {
__ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
broken_parity_status_show,broken_parity_status_store),
__ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
#ifdef CONFIG_HOTPLUG
__ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
__ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
#endif
__ATTR_NULL,
};
static ssize_t
boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf(buf, "%u\n",
!!(pdev->resource[PCI_ROM_RESOURCE].flags &
IORESOURCE_ROM_SHADOW));
}
struct device_attribute vga_attr = __ATTR_RO(boot_vga);
static ssize_t
pci_read_config(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
@ -492,6 +584,19 @@ pci_mmap_legacy_io(struct kobject *kobj, struct bin_attribute *attr,
return pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);
}
/**
* pci_adjust_legacy_attr - adjustment of legacy file attributes
* @b: bus to create files under
* @mmap_type: I/O port or memory
*
* Stub implementation. Can be overridden by arch if necessary.
*/
void __weak
pci_adjust_legacy_attr(struct pci_bus *b, enum pci_mmap_state mmap_type)
{
return;
}
/**
* pci_create_legacy_files - create legacy I/O port and memory files
* @b: bus to create files under
@ -518,6 +623,7 @@ void pci_create_legacy_files(struct pci_bus *b)
b->legacy_io->read = pci_read_legacy_io;
b->legacy_io->write = pci_write_legacy_io;
b->legacy_io->mmap = pci_mmap_legacy_io;
pci_adjust_legacy_attr(b, pci_mmap_io);
error = device_create_bin_file(&b->dev, b->legacy_io);
if (error)
goto legacy_io_err;
@ -528,6 +634,7 @@ void pci_create_legacy_files(struct pci_bus *b)
b->legacy_mem->size = 1024*1024;
b->legacy_mem->attr.mode = S_IRUSR | S_IWUSR;
b->legacy_mem->mmap = pci_mmap_legacy_mem;
pci_adjust_legacy_attr(b, pci_mmap_mem);
error = device_create_bin_file(&b->dev, b->legacy_mem);
if (error)
goto legacy_mem_err;
@ -719,8 +826,8 @@ static int pci_create_resource_files(struct pci_dev *pdev)
return 0;
}
#else /* !HAVE_PCI_MMAP */
static inline int pci_create_resource_files(struct pci_dev *dev) { return 0; }
static inline void pci_remove_resource_files(struct pci_dev *dev) { return; }
int __weak pci_create_resource_files(struct pci_dev *dev) { return 0; }
void __weak pci_remove_resource_files(struct pci_dev *dev) { return; }
#endif /* HAVE_PCI_MMAP */
/**
@ -884,18 +991,27 @@ int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
pdev->rom_attr = attr;
}
if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA) {
retval = device_create_file(&pdev->dev, &vga_attr);
if (retval)
goto err_rom_file;
}
/* add platform-specific attributes */
retval = pcibios_add_platform_entries(pdev);
if (retval)
goto err_rom_file;
goto err_vga_file;
/* add sysfs entries for various capabilities */
retval = pci_create_capabilities_sysfs(pdev);
if (retval)
goto err_rom_file;
goto err_vga_file;
return 0;
err_vga_file:
if ((pdev->class >> 8) == PCI_CLASS_DISPLAY_VGA)
device_remove_file(&pdev->dev, &vga_attr);
err_rom_file:
if (rom_size) {
sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);

197
drivers/pci/pci.c
Просмотреть файл

@ -20,6 +20,8 @@
#include <linux/pm_wakeup.h>
#include <linux/interrupt.h>
#include <asm/dma.h> /* isa_dma_bridge_buggy */
#include <linux/device.h>
#include <asm/setup.h>
#include "pci.h"
unsigned int pci_pm_d3_delay = PCI_PM_D3_WAIT;
@ -677,6 +679,8 @@ pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state)
EXPORT_SYMBOL(pci_choose_state);
#define PCI_EXP_SAVE_REGS 7
static int pci_save_pcie_state(struct pci_dev *dev)
{
int pos, i = 0;
@ -689,7 +693,7 @@ static int pci_save_pcie_state(struct pci_dev *dev)
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_EXP);
if (!save_state) {
dev_err(&dev->dev, "buffer not found in %s\n", __FUNCTION__);
dev_err(&dev->dev, "buffer not found in %s\n", __func__);
return -ENOMEM;
}
cap = (u16 *)&save_state->data[0];
@ -698,6 +702,9 @@ static int pci_save_pcie_state(struct pci_dev *dev)
pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_SLTCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_RTCTL, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_DEVCTL2, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_LNKCTL2, &cap[i++]);
pci_read_config_word(dev, pos + PCI_EXP_SLTCTL2, &cap[i++]);
return 0;
}
@ -718,6 +725,9 @@ static void pci_restore_pcie_state(struct pci_dev *dev)
pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_SLTCTL, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_RTCTL, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_DEVCTL2, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_LNKCTL2, cap[i++]);
pci_write_config_word(dev, pos + PCI_EXP_SLTCTL2, cap[i++]);
}
@ -732,7 +742,7 @@ static int pci_save_pcix_state(struct pci_dev *dev)
save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
if (!save_state) {
dev_err(&dev->dev, "buffer not found in %s\n", __FUNCTION__);
dev_err(&dev->dev, "buffer not found in %s\n", __func__);
return -ENOMEM;
}
@ -805,6 +815,7 @@ pci_restore_state(struct pci_dev *dev)
}
pci_restore_pcix_state(dev);
pci_restore_msi_state(dev);
pci_restore_iov_state(dev);
return 0;
}
@ -1401,7 +1412,8 @@ void pci_allocate_cap_save_buffers(struct pci_dev *dev)
{
int error;
error = pci_add_cap_save_buffer(dev, PCI_CAP_ID_EXP, 4 * sizeof(u16));
error = pci_add_cap_save_buffer(dev, PCI_CAP_ID_EXP,
PCI_EXP_SAVE_REGS * sizeof(u16));
if (error)
dev_err(&dev->dev,
"unable to preallocate PCI Express save buffer\n");
@ -1472,7 +1484,7 @@ pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge)
if (!pin)
return -1;
while (dev->bus->self) {
while (dev->bus->parent) {
pin = pci_swizzle_interrupt_pin(dev, pin);
dev = dev->bus->self;
}
@ -1492,7 +1504,7 @@ u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp)
{
u8 pin = *pinp;
while (dev->bus->self) {
while (dev->bus->parent) {
pin = pci_swizzle_interrupt_pin(dev, pin);
dev = dev->bus->self;
}
@ -2016,18 +2028,24 @@ static int __pcie_flr(struct pci_dev *dev, int probe)
pci_block_user_cfg_access(dev);
/* Wait for Transaction Pending bit clean */
pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
if (!(status & PCI_EXP_DEVSTA_TRPND))
goto transaction_done;
msleep(100);
pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
if (status & PCI_EXP_DEVSTA_TRPND) {
dev_info(&dev->dev, "Busy after 100ms while trying to reset; "
"sleeping for 1 second\n");
ssleep(1);
pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
if (status & PCI_EXP_DEVSTA_TRPND)
dev_info(&dev->dev, "Still busy after 1s; "
"proceeding with reset anyway\n");
}
if (!(status & PCI_EXP_DEVSTA_TRPND))
goto transaction_done;
dev_info(&dev->dev, "Busy after 100ms while trying to reset; "
"sleeping for 1 second\n");
ssleep(1);
pci_read_config_word(dev, exppos + PCI_EXP_DEVSTA, &status);
if (status & PCI_EXP_DEVSTA_TRPND)
dev_info(&dev->dev, "Still busy after 1s; "
"proceeding with reset anyway\n");
transaction_done:
pci_write_config_word(dev, exppos + PCI_EXP_DEVCTL,
PCI_EXP_DEVCTL_BCR_FLR);
mdelay(100);
@ -2054,18 +2072,24 @@ static int __pci_af_flr(struct pci_dev *dev, int probe)
pci_block_user_cfg_access(dev);
/* Wait for Transaction Pending bit clean */
pci_read_config_byte(dev, cappos + PCI_AF_STATUS, &status);
if (!(status & PCI_AF_STATUS_TP))
goto transaction_done;
msleep(100);
pci_read_config_byte(dev, cappos + PCI_AF_STATUS, &status);
if (status & PCI_AF_STATUS_TP) {
dev_info(&dev->dev, "Busy after 100ms while trying to"
" reset; sleeping for 1 second\n");
ssleep(1);
pci_read_config_byte(dev,
cappos + PCI_AF_STATUS, &status);
if (status & PCI_AF_STATUS_TP)
dev_info(&dev->dev, "Still busy after 1s; "
"proceeding with reset anyway\n");
}
if (!(status & PCI_AF_STATUS_TP))
goto transaction_done;
dev_info(&dev->dev, "Busy after 100ms while trying to"
" reset; sleeping for 1 second\n");
ssleep(1);
pci_read_config_byte(dev, cappos + PCI_AF_STATUS, &status);
if (status & PCI_AF_STATUS_TP)
dev_info(&dev->dev, "Still busy after 1s; "
"proceeding with reset anyway\n");
transaction_done:
pci_write_config_byte(dev, cappos + PCI_AF_CTRL, PCI_AF_CTRL_FLR);
mdelay(100);
@ -2334,18 +2358,140 @@ int pci_select_bars(struct pci_dev *dev, unsigned long flags)
*/
int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
{
int reg;
if (resno < PCI_ROM_RESOURCE) {
*type = pci_bar_unknown;
return PCI_BASE_ADDRESS_0 + 4 * resno;
} else if (resno == PCI_ROM_RESOURCE) {
*type = pci_bar_mem32;
return dev->rom_base_reg;
} else if (resno < PCI_BRIDGE_RESOURCES) {
/* device specific resource */
reg = pci_iov_resource_bar(dev, resno, type);
if (reg)
return reg;
}
dev_err(&dev->dev, "BAR: invalid resource #%d\n", resno);
return 0;
}
#define RESOURCE_ALIGNMENT_PARAM_SIZE COMMAND_LINE_SIZE
static char resource_alignment_param[RESOURCE_ALIGNMENT_PARAM_SIZE] = {0};
spinlock_t resource_alignment_lock = SPIN_LOCK_UNLOCKED;
/**
* pci_specified_resource_alignment - get resource alignment specified by user.
* @dev: the PCI device to get
*
* RETURNS: Resource alignment if it is specified.
* Zero if it is not specified.
*/
resource_size_t pci_specified_resource_alignment(struct pci_dev *dev)
{
int seg, bus, slot, func, align_order, count;
resource_size_t align = 0;
char *p;
spin_lock(&resource_alignment_lock);
p = resource_alignment_param;
while (*p) {
count = 0;
if (sscanf(p, "%d%n", &align_order, &count) == 1 &&
p[count] == '@') {
p += count + 1;
} else {
align_order = -1;
}
if (sscanf(p, "%x:%x:%x.%x%n",
&seg, &bus, &slot, &func, &count) != 4) {
seg = 0;
if (sscanf(p, "%x:%x.%x%n",
&bus, &slot, &func, &count) != 3) {
/* Invalid format */
printk(KERN_ERR "PCI: Can't parse resource_alignment parameter: %s\n",
p);
break;
}
}
p += count;
if (seg == pci_domain_nr(dev->bus) &&
bus == dev->bus->number &&
slot == PCI_SLOT(dev->devfn) &&
func == PCI_FUNC(dev->devfn)) {
if (align_order == -1) {
align = PAGE_SIZE;
} else {
align = 1 << align_order;
}
/* Found */
break;
}
if (*p != ';' && *p != ',') {
/* End of param or invalid format */
break;
}
p++;
}
spin_unlock(&resource_alignment_lock);
return align;
}
/**
* pci_is_reassigndev - check if specified PCI is target device to reassign
* @dev: the PCI device to check
*
* RETURNS: non-zero for PCI device is a target device to reassign,
* or zero is not.
*/
int pci_is_reassigndev(struct pci_dev *dev)
{
return (pci_specified_resource_alignment(dev) != 0);
}
ssize_t pci_set_resource_alignment_param(const char *buf, size_t count)
{
if (count > RESOURCE_ALIGNMENT_PARAM_SIZE - 1)
count = RESOURCE_ALIGNMENT_PARAM_SIZE - 1;
spin_lock(&resource_alignment_lock);
strncpy(resource_alignment_param, buf, count);
resource_alignment_param[count] = '\0';
spin_unlock(&resource_alignment_lock);
return count;
}
ssize_t pci_get_resource_alignment_param(char *buf, size_t size)
{
size_t count;
spin_lock(&resource_alignment_lock);
count = snprintf(buf, size, "%s", resource_alignment_param);
spin_unlock(&resource_alignment_lock);
return count;
}
static ssize_t pci_resource_alignment_show(struct bus_type *bus, char *buf)
{
return pci_get_resource_alignment_param(buf, PAGE_SIZE);
}
static ssize_t pci_resource_alignment_store(struct bus_type *bus,
const char *buf, size_t count)
{
return pci_set_resource_alignment_param(buf, count);
}
BUS_ATTR(resource_alignment, 0644, pci_resource_alignment_show,
pci_resource_alignment_store);
static int __init pci_resource_alignment_sysfs_init(void)
{
return bus_create_file(&pci_bus_type,
&bus_attr_resource_alignment);
}
late_initcall(pci_resource_alignment_sysfs_init);
static void __devinit pci_no_domains(void)
{
#ifdef CONFIG_PCI_DOMAINS
@ -2394,6 +2540,9 @@ static int __init pci_setup(char *str)
pci_cardbus_io_size = memparse(str + 9, &str);
} else if (!strncmp(str, "cbmemsize=", 10)) {
pci_cardbus_mem_size = memparse(str + 10, &str);
} else if (!strncmp(str, "resource_alignment=", 19)) {
pci_set_resource_alignment_param(str + 19,
strlen(str + 19));
} else {
printk(KERN_ERR "PCI: Unknown option `%s'\n",
str);

65
drivers/pci/pci.h
Просмотреть файл

@ -1,6 +1,8 @@
#ifndef DRIVERS_PCI_H
#define DRIVERS_PCI_H
#include <linux/workqueue.h>
#define PCI_CFG_SPACE_SIZE 256
#define PCI_CFG_SPACE_EXP_SIZE 4096
@ -135,6 +137,12 @@ extern int pcie_mch_quirk;
extern struct device_attribute pci_dev_attrs[];
extern struct device_attribute dev_attr_cpuaffinity;
extern struct device_attribute dev_attr_cpulistaffinity;
#ifdef CONFIG_HOTPLUG
extern struct bus_attribute pci_bus_attrs[];
#else
#define pci_bus_attrs NULL
#endif
/**
* pci_match_one_device - Tell if a PCI device structure has a matching
@ -177,6 +185,7 @@ enum pci_bar_type {
pci_bar_mem64, /* A 64-bit memory BAR */
};
extern int pci_setup_device(struct pci_dev *dev);
extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
struct resource *res, unsigned int reg);
extern int pci_resource_bar(struct pci_dev *dev, int resno,
@ -194,4 +203,60 @@ static inline int pci_ari_enabled(struct pci_bus *bus)
return bus->self && bus->self->ari_enabled;
}
#ifdef CONFIG_PCI_QUIRKS
extern int pci_is_reassigndev(struct pci_dev *dev);
resource_size_t pci_specified_resource_alignment(struct pci_dev *dev);
extern void pci_disable_bridge_window(struct pci_dev *dev);
#endif
/* Single Root I/O Virtualization */
struct pci_sriov {
int pos; /* capability position */
int nres; /* number of resources */
u32 cap; /* SR-IOV Capabilities */
u16 ctrl; /* SR-IOV Control */
u16 total; /* total VFs associated with the PF */
u16 initial; /* initial VFs associated with the PF */
u16 nr_virtfn; /* number of VFs available */
u16 offset; /* first VF Routing ID offset */
u16 stride; /* following VF stride */
u32 pgsz; /* page size for BAR alignment */
u8 link; /* Function Dependency Link */
struct pci_dev *dev; /* lowest numbered PF */
struct pci_dev *self; /* this PF */
struct mutex lock; /* lock for VF bus */
struct work_struct mtask; /* VF Migration task */
u8 __iomem *mstate; /* VF Migration State Array */
};
#ifdef CONFIG_PCI_IOV
extern int pci_iov_init(struct pci_dev *dev);
extern void pci_iov_release(struct pci_dev *dev);
extern int pci_iov_resource_bar(struct pci_dev *dev, int resno,
enum pci_bar_type *type);
extern void pci_restore_iov_state(struct pci_dev *dev);
extern int pci_iov_bus_range(struct pci_bus *bus);
#else
static inline int pci_iov_init(struct pci_dev *dev)
{
return -ENODEV;
}
static inline void pci_iov_release(struct pci_dev *dev)
{
}
static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
enum pci_bar_type *type)
{
return 0;
}
static inline void pci_restore_iov_state(struct pci_dev *dev)
{
}
static inline int pci_iov_bus_range(struct pci_bus *bus)
{
return 0;
}
#endif /* CONFIG_PCI_IOV */
#endif /* DRIVERS_PCI_H */

28
drivers/pci/pcie/aer/aerdrv.c
Просмотреть файл

@ -38,30 +38,13 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static int __devinit aer_probe (struct pcie_device *dev,
const struct pcie_port_service_id *id );
static int __devinit aer_probe (struct pcie_device *dev);
static void aer_remove(struct pcie_device *dev);
static int aer_suspend(struct pcie_device *dev, pm_message_t state)
{return 0;}
static int aer_resume(struct pcie_device *dev) {return 0;}
static pci_ers_result_t aer_error_detected(struct pci_dev *dev,
enum pci_channel_state error);
static void aer_error_resume(struct pci_dev *dev);
static pci_ers_result_t aer_root_reset(struct pci_dev *dev);
/*
* PCI Express bus's AER Root service driver data structure
*/
static struct pcie_port_service_id aer_id[] = {
{
.vendor = PCI_ANY_ID,
.device = PCI_ANY_ID,
.port_type = PCIE_RC_PORT,
.service_type = PCIE_PORT_SERVICE_AER,
},
{ /* end: all zeroes */ }
};
static struct pci_error_handlers aer_error_handlers = {
.error_detected = aer_error_detected,
.resume = aer_error_resume,
@ -69,14 +52,12 @@ static struct pci_error_handlers aer_error_handlers = {
static struct pcie_port_service_driver aerdriver = {
.name = "aer",
.id_table = &aer_id[0],
.port_type = PCIE_ANY_PORT,
.service = PCIE_PORT_SERVICE_AER,
.probe = aer_probe,
.remove = aer_remove,
.suspend = aer_suspend,
.resume = aer_resume,
.err_handler = &aer_error_handlers,
.reset_link = aer_root_reset,
@ -207,8 +188,7 @@ static void aer_remove(struct pcie_device *dev)
*
* Invoked when PCI Express bus loads AER service driver.
**/
static int __devinit aer_probe (struct pcie_device *dev,
const struct pcie_port_service_id *id )
static int __devinit aer_probe (struct pcie_device *dev)
{
int status;
struct aer_rpc *rpc;

2
drivers/pci/pcie/aer/aerdrv_acpi.c
Просмотреть файл

@ -38,7 +38,7 @@ int aer_osc_setup(struct pcie_device *pciedev)
handle = acpi_find_root_bridge_handle(pdev);
if (handle) {
status = pci_osc_control_set(handle,
status = acpi_pci_osc_control_set(handle,
OSC_PCI_EXPRESS_AER_CONTROL |
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
}

10
drivers/pci/pcie/aer/aerdrv_core.c
Просмотреть файл

@ -351,21 +351,21 @@ static int find_aer_service_iter(struct device *device, void *data)
{
struct device_driver *driver;
struct pcie_port_service_driver *service_driver;
struct pcie_device *pcie_dev;
struct find_aer_service_data *result;
result = (struct find_aer_service_data *) data;
if (device->bus == &pcie_port_bus_type) {
pcie_dev = to_pcie_device(device);
if (pcie_dev->id.port_type == PCIE_SW_DOWNSTREAM_PORT)
struct pcie_port_data *port_data;
port_data = pci_get_drvdata(to_pcie_device(device)->port);
if (port_data->port_type == PCIE_SW_DOWNSTREAM_PORT)
result->is_downstream = 1;
driver = device->driver;
if (driver) {
service_driver = to_service_driver(driver);
if (service_driver->id_table->service_type ==
PCIE_PORT_SERVICE_AER) {
if (service_driver->service == PCIE_PORT_SERVICE_AER) {
result->aer_driver = service_driver;
return 1;
}

14
drivers/pci/pcie/portdrv.h
Просмотреть файл

@ -25,19 +25,21 @@
#define PCIE_CAPABILITIES_REG 0x2
#define PCIE_SLOT_CAPABILITIES_REG 0x14
#define PCIE_PORT_DEVICE_MAXSERVICES 4
#define PCIE_PORT_MSI_VECTOR_MASK 0x1f
/*
* According to the PCI Express Base Specification 2.0, the indices of the MSI-X
* table entires used by port services must not exceed 31
*/
#define PCIE_PORT_MAX_MSIX_ENTRIES 32
#define get_descriptor_id(type, service) (((type - 4) << 4) | service)
struct pcie_port_device_ext {
int interrupt_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
};
extern struct bus_type pcie_port_bus_type;
extern int pcie_port_device_probe(struct pci_dev *dev);
extern int pcie_port_device_register(struct pci_dev *dev);
#ifdef CONFIG_PM
extern int pcie_port_device_suspend(struct pci_dev *dev, pm_message_t state);
extern int pcie_port_device_resume(struct pci_dev *dev);
extern int pcie_port_device_suspend(struct device *dev);
extern int pcie_port_device_resume(struct device *dev);
#endif
extern void pcie_port_device_remove(struct pci_dev *dev);
extern int __must_check pcie_port_bus_register(void);

18
drivers/pci/pcie/portdrv_bus.c
Просмотреть файл

@ -26,20 +26,22 @@ EXPORT_SYMBOL_GPL(pcie_port_bus_type);
static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
{
struct pcie_device *pciedev;
struct pcie_port_data *port_data;
struct pcie_port_service_driver *driver;
if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
return 0;
pciedev = to_pcie_device(dev);
driver = to_service_driver(drv);
if ( (driver->id_table->vendor != PCI_ANY_ID &&
driver->id_table->vendor != pciedev->id.vendor) ||
(driver->id_table->device != PCI_ANY_ID &&
driver->id_table->device != pciedev->id.device) ||
(driver->id_table->port_type != PCIE_ANY_PORT &&
driver->id_table->port_type != pciedev->id.port_type) ||
driver->id_table->service_type != pciedev->id.service_type )
if (driver->service != pciedev->service)
return 0;
port_data = pci_get_drvdata(pciedev->port);
if (driver->port_type != PCIE_ANY_PORT
&& driver->port_type != port_data->port_type)
return 0;
return 1;

377
drivers/pci/pcie/portdrv_core.c
Просмотреть файл

@ -15,10 +15,9 @@
#include <linux/slab.h>
#include <linux/pcieport_if.h>
#include "../pci.h"
#include "portdrv.h"
extern int pcie_mch_quirk; /* MSI-quirk Indicator */
/**
* release_pcie_device - free PCI Express port service device structure
* @dev: Port service device to release
@ -31,26 +30,150 @@ static void release_pcie_device(struct device *dev)
kfree(to_pcie_device(dev));
}
static int is_msi_quirked(struct pci_dev *dev)
/**
* pcie_port_msix_add_entry - add entry to given array of MSI-X entries
* @entries: Array of MSI-X entries
* @new_entry: Index of the entry to add to the array
* @nr_entries: Number of entries aleady in the array
*
* Return value: Position of the added entry in the array
*/
static int pcie_port_msix_add_entry(
struct msix_entry *entries, int new_entry, int nr_entries)
{
int port_type, quirk = 0;
u16 reg16;
int j;
pci_read_config_word(dev,
pci_find_capability(dev, PCI_CAP_ID_EXP) +
PCIE_CAPABILITIES_REG, &reg16);
port_type = (reg16 >> 4) & PORT_TYPE_MASK;
switch(port_type) {
case PCIE_RC_PORT:
if (pcie_mch_quirk == 1)
quirk = 1;
break;
case PCIE_SW_UPSTREAM_PORT:
case PCIE_SW_DOWNSTREAM_PORT:
default:
break;
for (j = 0; j < nr_entries; j++)
if (entries[j].entry == new_entry)
return j;
entries[j].entry = new_entry;
return j;
}
/**
* pcie_port_enable_msix - try to set up MSI-X as interrupt mode for given port
* @dev: PCI Express port to handle
* @vectors: Array of interrupt vectors to populate
* @mask: Bitmask of port capabilities returned by get_port_device_capability()
*
* Return value: 0 on success, error code on failure
*/
static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask)
{
struct msix_entry *msix_entries;
int idx[PCIE_PORT_DEVICE_MAXSERVICES];
int nr_entries, status, pos, i, nvec;
u16 reg16;
u32 reg32;
nr_entries = pci_msix_table_size(dev);
if (!nr_entries)
return -EINVAL;
if (nr_entries > PCIE_PORT_MAX_MSIX_ENTRIES)
nr_entries = PCIE_PORT_MAX_MSIX_ENTRIES;
msix_entries = kzalloc(sizeof(*msix_entries) * nr_entries, GFP_KERNEL);
if (!msix_entries)
return -ENOMEM;
/*
* Allocate as many entries as the port wants, so that we can check
* which of them will be useful. Moreover, if nr_entries is correctly
* equal to the number of entries this port actually uses, we'll happily
* go through without any tricks.
*/
for (i = 0; i < nr_entries; i++)
msix_entries[i].entry = i;
status = pci_enable_msix(dev, msix_entries, nr_entries);
if (status)
goto Exit;
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
idx[i] = -1;
status = -EIO;
nvec = 0;
if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) {
int entry;
/*
* The code below follows the PCI Express Base Specification 2.0
* stating in Section 6.1.6 that "PME and Hot-Plug Event
* interrupts (when both are implemented) always share the same
* MSI or MSI-X vector, as indicated by the Interrupt Message
* Number field in the PCI Express Capabilities register", where
* according to Section 7.8.2 of the specification "For MSI-X,
* the value in this field indicates which MSI-X Table entry is
* used to generate the interrupt message."
*/
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, &reg16);
entry = (reg16 >> 9) & PCIE_PORT_MSI_VECTOR_MASK;
if (entry >= nr_entries)
goto Error;
i = pcie_port_msix_add_entry(msix_entries, entry, nvec);
if (i == nvec)
nvec++;
idx[PCIE_PORT_SERVICE_PME_SHIFT] = i;
idx[PCIE_PORT_SERVICE_HP_SHIFT] = i;
}
return quirk;
if (mask & PCIE_PORT_SERVICE_AER) {
int entry;
/*
* The code below follows Section 7.10.10 of the PCI Express
* Base Specification 2.0 stating that bits 31-27 of the Root
* Error Status Register contain a value indicating which of the
* MSI/MSI-X vectors assigned to the port is going to be used
* for AER, where "For MSI-X, the value in this register
* indicates which MSI-X Table entry is used to generate the
* interrupt message."
*/
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &reg32);
entry = reg32 >> 27;
if (entry >= nr_entries)
goto Error;
i = pcie_port_msix_add_entry(msix_entries, entry, nvec);
if (i == nvec)
nvec++;
idx[PCIE_PORT_SERVICE_AER_SHIFT] = i;
}
/*
* If nvec is equal to the allocated number of entries, we can just use
* what we have. Otherwise, the port has some extra entries not for the
* services we know and we need to work around that.
*/
if (nvec == nr_entries) {
status = 0;
} else {
/* Drop the temporary MSI-X setup */
pci_disable_msix(dev);
/* Now allocate the MSI-X vectors for real */
status = pci_enable_msix(dev, msix_entries, nvec);
if (status)
goto Exit;
}
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
vectors[i] = idx[i] >= 0 ? msix_entries[idx[i]].vector : -1;
Exit:
kfree(msix_entries);
return status;
Error:
pci_disable_msix(dev);
goto Exit;
}
/**
@ -64,47 +187,32 @@ static int is_msi_quirked(struct pci_dev *dev)
*/
static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
{
int i, pos, nvec, status = -EINVAL;
int interrupt_mode = PCIE_PORT_INTx_MODE;
struct pcie_port_data *port_data = pci_get_drvdata(dev);
int irq, interrupt_mode = PCIE_PORT_NO_IRQ;
int i;
/* Set INTx as default */
for (i = 0, nvec = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
if (mask & (1 << i))
nvec++;
vectors[i] = dev->irq;
}
/* Check MSI quirk */
if (is_msi_quirked(dev))
return interrupt_mode;
if (port_data->port_type == PCIE_RC_PORT && pcie_mch_quirk)
goto Fallback;
/* Select MSI-X over MSI if supported */
pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
if (pos) {
struct msix_entry msix_entries[PCIE_PORT_DEVICE_MAXSERVICES] =
{{0, 0}, {0, 1}, {0, 2}, {0, 3}};
status = pci_enable_msix(dev, msix_entries, nvec);
if (!status) {
int j = 0;
/* Try to use MSI-X if supported */
if (!pcie_port_enable_msix(dev, vectors, mask))
return PCIE_PORT_MSIX_MODE;
/* We're not going to use MSI-X, so try MSI and fall back to INTx */
if (!pci_enable_msi(dev))
interrupt_mode = PCIE_PORT_MSI_MODE;
Fallback:
if (interrupt_mode == PCIE_PORT_NO_IRQ && dev->pin)
interrupt_mode = PCIE_PORT_INTx_MODE;
irq = interrupt_mode != PCIE_PORT_NO_IRQ ? dev->irq : -1;
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
vectors[i] = irq;
vectors[PCIE_PORT_SERVICE_VC_SHIFT] = -1;
interrupt_mode = PCIE_PORT_MSIX_MODE;
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
if (mask & (1 << i))
vectors[i] = msix_entries[j++].vector;
}
}
}
if (status) {
pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
if (pos) {
status = pci_enable_msi(dev);
if (!status) {
interrupt_mode = PCIE_PORT_MSI_MODE;
for (i = 0;i < PCIE_PORT_DEVICE_MAXSERVICES;i++)
vectors[i] = dev->irq;
}
}
}
return interrupt_mode;
}
@ -132,13 +240,11 @@ static int get_port_device_capability(struct pci_dev *dev)
pos + PCIE_SLOT_CAPABILITIES_REG, &reg32);
if (reg32 & SLOT_HP_CAPABLE_MASK)
services |= PCIE_PORT_SERVICE_HP;
}
/* PME Capable - root port capability */
if (((reg16 >> 4) & PORT_TYPE_MASK) == PCIE_RC_PORT)
services |= PCIE_PORT_SERVICE_PME;
}
/* AER capable */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR))
services |= PCIE_PORT_SERVICE_AER;
/* VC support */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC))
services |= PCIE_PORT_SERVICE_VC;
@ -152,20 +258,17 @@ static int get_port_device_capability(struct pci_dev *dev)
* @port_type: Type of the port
* @service_type: Type of service to associate with the service device
* @irq: Interrupt vector to associate with the service device
* @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI)
*/
static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
int port_type, int service_type, int irq, int irq_mode)
int service_type, int irq)
{
struct pcie_port_data *port_data = pci_get_drvdata(parent);
struct device *device;
int port_type = port_data->port_type;
dev->port = parent;
dev->interrupt_mode = irq_mode;
dev->irq = irq;
dev->id.vendor = parent->vendor;
dev->id.device = parent->device;
dev->id.port_type = port_type;
dev->id.service_type = (1 << service_type);
dev->service = service_type;
/* Initialize generic device interface */
device = &dev->device;
@ -185,10 +288,9 @@ static void pcie_device_init(struct pci_dev *parent, struct pcie_device *dev,
* @port_type: Type of the port
* @service_type: Type of service to associate with the service device
* @irq: Interrupt vector to associate with the service device
* @irq_mode: Interrupt mode of the service (INTx, MSI-X, MSI)
*/
static struct pcie_device* alloc_pcie_device(struct pci_dev *parent,
int port_type, int service_type, int irq, int irq_mode)
int service_type, int irq)
{
struct pcie_device *device;
@ -196,7 +298,7 @@ static struct pcie_device* alloc_pcie_device(struct pci_dev *parent,
if (!device)
return NULL;
pcie_device_init(parent, device, port_type, service_type, irq,irq_mode);
pcie_device_init(parent, device, service_type, irq);
return device;
}
@ -230,63 +332,90 @@ int pcie_port_device_probe(struct pci_dev *dev)
*/
int pcie_port_device_register(struct pci_dev *dev)
{
struct pcie_port_device_ext *p_ext;
int status, type, capabilities, irq_mode, i;
struct pcie_port_data *port_data;
int status, capabilities, irq_mode, i, nr_serv;
int vectors[PCIE_PORT_DEVICE_MAXSERVICES];
u16 reg16;
/* Allocate port device extension */
if (!(p_ext = kmalloc(sizeof(struct pcie_port_device_ext), GFP_KERNEL)))
port_data = kzalloc(sizeof(*port_data), GFP_KERNEL);
if (!port_data)
return -ENOMEM;
pci_set_drvdata(dev, p_ext);
pci_set_drvdata(dev, port_data);
/* Get port type */
pci_read_config_word(dev,
pci_find_capability(dev, PCI_CAP_ID_EXP) +
PCIE_CAPABILITIES_REG, &reg16);
type = (reg16 >> 4) & PORT_TYPE_MASK;
port_data->port_type = (reg16 >> 4) & PORT_TYPE_MASK;
/* Now get port services */
capabilities = get_port_device_capability(dev);
/* Root ports are capable of generating PME too */
if (port_data->port_type == PCIE_RC_PORT)
capabilities |= PCIE_PORT_SERVICE_PME;
irq_mode = assign_interrupt_mode(dev, vectors, capabilities);
p_ext->interrupt_mode = irq_mode;
if (irq_mode == PCIE_PORT_NO_IRQ) {
/*
* Don't use service devices that require interrupts if there is
* no way to generate them.
*/
if (!(capabilities & PCIE_PORT_SERVICE_VC)) {
status = -ENODEV;
goto Error;
}
capabilities = PCIE_PORT_SERVICE_VC;
}
port_data->port_irq_mode = irq_mode;
status = pci_enable_device(dev);
if (status)
goto Error;
pci_set_master(dev);
/* Allocate child services if any */
for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
for (i = 0, nr_serv = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
struct pcie_device *child;
int service = 1 << i;
if (capabilities & (1 << i)) {
child = alloc_pcie_device(
dev, /* parent */
type, /* port type */
i, /* service type */
vectors[i], /* irq */
irq_mode /* interrupt mode */);
if (child) {
status = device_register(&child->device);
if (status) {
kfree(child);
continue;
}
get_device(&child->device);
}
if (!(capabilities & service))
continue;
child = alloc_pcie_device(dev, service, vectors[i]);
if (!child)
continue;
status = device_register(&child->device);
if (status) {
kfree(child);
continue;
}
get_device(&child->device);
nr_serv++;
}
if (!nr_serv) {
pci_disable_device(dev);
status = -ENODEV;
goto Error;
}
return 0;
Error:
kfree(port_data);
return status;
}
#ifdef CONFIG_PM
static int suspend_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
pm_message_t state = * (pm_message_t *) data;
if ((dev->bus == &pcie_port_bus_type) &&
(dev->driver)) {
service_driver = to_service_driver(dev->driver);
if (service_driver->suspend)
service_driver->suspend(to_pcie_device(dev), state);
service_driver->suspend(to_pcie_device(dev));
}
return 0;
}
@ -294,11 +423,10 @@ static int suspend_iter(struct device *dev, void *data)
/**
* pcie_port_device_suspend - suspend port services associated with a PCIe port
* @dev: PCI Express port to handle
* @state: Representation of system power management transition in progress
*/
int pcie_port_device_suspend(struct pci_dev *dev, pm_message_t state)
int pcie_port_device_suspend(struct device *dev)
{
return device_for_each_child(&dev->dev, &state, suspend_iter);
return device_for_each_child(dev, NULL, suspend_iter);
}
static int resume_iter(struct device *dev, void *data)
@ -318,24 +446,17 @@ static int resume_iter(struct device *dev, void *data)
* pcie_port_device_suspend - resume port services associated with a PCIe port
* @dev: PCI Express port to handle
*/
int pcie_port_device_resume(struct pci_dev *dev)
int pcie_port_device_resume(struct device *dev)
{
return device_for_each_child(&dev->dev, NULL, resume_iter);
return device_for_each_child(dev, NULL, resume_iter);
}
#endif
#endif /* PM */
static int remove_iter(struct device *dev, void *data)
{
struct pcie_port_service_driver *service_driver;
if (dev->bus == &pcie_port_bus_type) {
if (dev->driver) {
service_driver = to_service_driver(dev->driver);
if (service_driver->remove)
service_driver->remove(to_pcie_device(dev));
}
*(unsigned long*)data = (unsigned long)dev;
return 1;
put_device(dev);
device_unregister(dev);
}
return 0;
}
@ -349,25 +470,21 @@ static int remove_iter(struct device *dev, void *data)
*/
void pcie_port_device_remove(struct pci_dev *dev)
{
struct device *device;
unsigned long device_addr;
int interrupt_mode = PCIE_PORT_INTx_MODE;
int status;
struct pcie_port_data *port_data = pci_get_drvdata(dev);
do {
status = device_for_each_child(&dev->dev, &device_addr, remove_iter);
if (status) {
device = (struct device*)device_addr;
interrupt_mode = (to_pcie_device(device))->interrupt_mode;
put_device(device);
device_unregister(device);
}
} while (status);
/* Switch to INTx by default if MSI enabled */
if (interrupt_mode == PCIE_PORT_MSIX_MODE)
device_for_each_child(&dev->dev, NULL, remove_iter);
pci_disable_device(dev);
switch (port_data->port_irq_mode) {
case PCIE_PORT_MSIX_MODE:
pci_disable_msix(dev);
else if (interrupt_mode == PCIE_PORT_MSI_MODE)
break;
case PCIE_PORT_MSI_MODE:
pci_disable_msi(dev);
break;
}
kfree(port_data);
}
/**
@ -392,7 +509,7 @@ static int pcie_port_probe_service(struct device *dev)
return -ENODEV;
pciedev = to_pcie_device(dev);
status = driver->probe(pciedev, driver->id_table);
status = driver->probe(pciedev);
if (!status) {
dev_printk(KERN_DEBUG, dev, "service driver %s loaded\n",
driver->name);

50
drivers/pci/pcie/portdrv_pci.c
Просмотреть файл

@ -32,11 +32,6 @@ MODULE_LICENSE("GPL");
/* global data */
static const char device_name[] = "pcieport-driver";
static int pcie_portdrv_save_config(struct pci_dev *dev)
{
return pci_save_state(dev);
}
static int pcie_portdrv_restore_config(struct pci_dev *dev)
{
int retval;
@ -49,21 +44,21 @@ static int pcie_portdrv_restore_config(struct pci_dev *dev)
}
#ifdef CONFIG_PM
static int pcie_portdrv_suspend(struct pci_dev *dev, pm_message_t state)
{
return pcie_port_device_suspend(dev, state);
static struct dev_pm_ops pcie_portdrv_pm_ops = {
.suspend = pcie_port_device_suspend,
.resume = pcie_port_device_resume,
.freeze = pcie_port_device_suspend,
.thaw = pcie_port_device_resume,
.poweroff = pcie_port_device_suspend,
.restore = pcie_port_device_resume,
};
}
#define PCIE_PORTDRV_PM_OPS (&pcie_portdrv_pm_ops)
static int pcie_portdrv_resume(struct pci_dev *dev)
{
pci_set_master(dev);
return pcie_port_device_resume(dev);
}
#else
#define pcie_portdrv_suspend NULL
#define pcie_portdrv_resume NULL
#endif
#else /* !PM */
#define PCIE_PORTDRV_PM_OPS NULL
#endif /* !PM */
/*
* pcie_portdrv_probe - Probe PCI-Express port devices
@ -82,20 +77,15 @@ static int __devinit pcie_portdrv_probe (struct pci_dev *dev,
if (status)
return status;
if (pci_enable_device(dev) < 0)
return -ENODEV;
pci_set_master(dev);
if (!dev->irq && dev->pin) {
dev_warn(&dev->dev, "device [%04x:%04x] has invalid IRQ; "
"check vendor BIOS\n", dev->vendor, dev->device);
}
if (pcie_port_device_register(dev)) {
pci_disable_device(dev);
return -ENOMEM;
}
status = pcie_port_device_register(dev);
if (status)
return status;
pcie_portdrv_save_config(dev);
pci_save_state(dev);
return 0;
}
@ -104,7 +94,6 @@ static void pcie_portdrv_remove (struct pci_dev *dev)
{
pcie_port_device_remove(dev);
pci_disable_device(dev);
kfree(pci_get_drvdata(dev));
}
static int error_detected_iter(struct device *device, void *data)
@ -278,10 +267,9 @@ static struct pci_driver pcie_portdriver = {
.probe = pcie_portdrv_probe,
.remove = pcie_portdrv_remove,
.suspend = pcie_portdrv_suspend,
.resume = pcie_portdrv_resume,
.err_handler = &pcie_portdrv_err_handler,
.driver.pm = PCIE_PORTDRV_PM_OPS,
};
static int __init pcie_portdrv_init(void)

208
drivers/pci/probe.c
Просмотреть файл

@ -287,7 +287,7 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
struct resource *res;
int i;
if (!dev) /* It's a host bus, nothing to read */
if (!child->parent) /* It's a host bus, nothing to read */
return;
if (dev->transparent) {
@ -511,21 +511,21 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
/*
* If we already got to this bus through a different bridge,
* ignore it. This can happen with the i450NX chipset.
* don't re-add it. This can happen with the i450NX chipset.
*
* However, we continue to descend down the hierarchy and
* scan remaining child buses.
*/
if (pci_find_bus(pci_domain_nr(bus), busnr)) {
dev_info(&dev->dev, "bus %04x:%02x already known\n",
pci_domain_nr(bus), busnr);
goto out;
child = pci_find_bus(pci_domain_nr(bus), busnr);
if (!child) {
child = pci_add_new_bus(bus, dev, busnr);
if (!child)
goto out;
child->primary = buses & 0xFF;
child->subordinate = (buses >> 16) & 0xFF;
child->bridge_ctl = bctl;
}
child = pci_add_new_bus(bus, dev, busnr);
if (!child)
goto out;
child->primary = buses & 0xFF;
child->subordinate = (buses >> 16) & 0xFF;
child->bridge_ctl = bctl;
cmax = pci_scan_child_bus(child);
if (cmax > max)
max = cmax;
@ -674,6 +674,19 @@ static void pci_read_irq(struct pci_dev *dev)
dev->irq = irq;
}
static void set_pcie_port_type(struct pci_dev *pdev)
{
int pos;
u16 reg16;
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (!pos)
return;
pdev->is_pcie = 1;
pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, &reg16);
pdev->pcie_type = (reg16 & PCI_EXP_FLAGS_TYPE) >> 4;
}
#define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED)
/**
@ -683,12 +696,33 @@ static void pci_read_irq(struct pci_dev *dev)
* Initialize the device structure with information about the device's
* vendor,class,memory and IO-space addresses,IRQ lines etc.
* Called at initialisation of the PCI subsystem and by CardBus services.
* Returns 0 on success and -1 if unknown type of device (not normal, bridge
* or CardBus).
* Returns 0 on success and negative if unknown type of device (not normal,
* bridge or CardBus).
*/
static int pci_setup_device(struct pci_dev * dev)
int pci_setup_device(struct pci_dev *dev)
{
u32 class;
u8 hdr_type;
struct pci_slot *slot;
if (pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type))
return -EIO;
dev->sysdata = dev->bus->sysdata;
dev->dev.parent = dev->bus->bridge;
dev->dev.bus = &pci_bus_type;
dev->hdr_type = hdr_type & 0x7f;
dev->multifunction = !!(hdr_type & 0x80);
dev->error_state = pci_channel_io_normal;
set_pcie_port_type(dev);
list_for_each_entry(slot, &dev->bus->slots, list)
if (PCI_SLOT(dev->devfn) == slot->number)
dev->slot = slot;
/* Assume 32-bit PCI; let 64-bit PCI cards (which are far rarer)
set this higher, assuming the system even supports it. */
dev->dma_mask = 0xffffffff;
dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(dev->bus),
dev->bus->number, PCI_SLOT(dev->devfn),
@ -703,12 +737,14 @@ static int pci_setup_device(struct pci_dev * dev)
dev_dbg(&dev->dev, "found [%04x:%04x] class %06x header type %02x\n",
dev->vendor, dev->device, class, dev->hdr_type);
/* need to have dev->class ready */
dev->cfg_size = pci_cfg_space_size(dev);
/* "Unknown power state" */
dev->current_state = PCI_UNKNOWN;
/* Early fixups, before probing the BARs */
pci_fixup_device(pci_fixup_early, dev);
class = dev->class >> 8;
switch (dev->hdr_type) { /* header type */
case PCI_HEADER_TYPE_NORMAL: /* standard header */
@ -770,7 +806,7 @@ static int pci_setup_device(struct pci_dev * dev)
default: /* unknown header */
dev_err(&dev->dev, "unknown header type %02x, "
"ignoring device\n", dev->hdr_type);
return -1;
return -EIO;
bad:
dev_err(&dev->dev, "ignoring class %02x (doesn't match header "
@ -785,6 +821,7 @@ static int pci_setup_device(struct pci_dev * dev)
static void pci_release_capabilities(struct pci_dev *dev)
{
pci_vpd_release(dev);
pci_iov_release(dev);
}
/**
@ -803,19 +840,6 @@ static void pci_release_dev(struct device *dev)
kfree(pci_dev);
}
static void set_pcie_port_type(struct pci_dev *pdev)
{
int pos;
u16 reg16;
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (!pos)
return;
pdev->is_pcie = 1;
pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, &reg16);
pdev->pcie_type = (reg16 & PCI_EXP_FLAGS_TYPE) >> 4;
}
/**
* pci_cfg_space_size - get the configuration space size of the PCI device.
* @dev: PCI device
@ -847,6 +871,11 @@ int pci_cfg_space_size(struct pci_dev *dev)
{
int pos;
u32 status;
u16 class;
class = dev->class >> 8;
if (class == PCI_CLASS_BRIDGE_HOST)
return pci_cfg_space_size_ext(dev);
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (!pos) {
@ -891,9 +920,7 @@ EXPORT_SYMBOL(alloc_pci_dev);
static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
{
struct pci_dev *dev;
struct pci_slot *slot;
u32 l;
u8 hdr_type;
int delay = 1;
if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, &l))
@ -920,34 +947,16 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
}
}
if (pci_bus_read_config_byte(bus, devfn, PCI_HEADER_TYPE, &hdr_type))
return NULL;
dev = alloc_pci_dev();
if (!dev)
return NULL;
dev->bus = bus;
dev->sysdata = bus->sysdata;
dev->dev.parent = bus->bridge;
dev->dev.bus = &pci_bus_type;
dev->devfn = devfn;
dev->hdr_type = hdr_type & 0x7f;
dev->multifunction = !!(hdr_type & 0x80);
dev->vendor = l & 0xffff;
dev->device = (l >> 16) & 0xffff;
dev->cfg_size = pci_cfg_space_size(dev);
dev->error_state = pci_channel_io_normal;
set_pcie_port_type(dev);
list_for_each_entry(slot, &bus->slots, list)
if (PCI_SLOT(devfn) == slot->number)
dev->slot = slot;
/* Assume 32-bit PCI; let 64-bit PCI cards (which are far rarer)
set this higher, assuming the system even supports it. */
dev->dma_mask = 0xffffffff;
if (pci_setup_device(dev) < 0) {
if (pci_setup_device(dev)) {
kfree(dev);
return NULL;
}
@ -972,6 +981,9 @@ static void pci_init_capabilities(struct pci_dev *dev)
/* Alternative Routing-ID Forwarding */
pci_enable_ari(dev);
/* Single Root I/O Virtualization */
pci_iov_init(dev);
}
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
@ -1006,6 +1018,12 @@ struct pci_dev *__ref pci_scan_single_device(struct pci_bus *bus, int devfn)
{
struct pci_dev *dev;
dev = pci_get_slot(bus, devfn);
if (dev) {
pci_dev_put(dev);
return dev;
}
dev = pci_scan_device(bus, devfn);
if (!dev)
return NULL;
@ -1024,35 +1042,27 @@ EXPORT_SYMBOL(pci_scan_single_device);
* Scan a PCI slot on the specified PCI bus for devices, adding
* discovered devices to the @bus->devices list. New devices
* will not have is_added set.
*
* Returns the number of new devices found.
*/
int pci_scan_slot(struct pci_bus *bus, int devfn)
{
int func, nr = 0;
int scan_all_fns;
int fn, nr = 0;
struct pci_dev *dev;
scan_all_fns = pcibios_scan_all_fns(bus, devfn);
dev = pci_scan_single_device(bus, devfn);
if (dev && !dev->is_added) /* new device? */
nr++;
for (func = 0; func < 8; func++, devfn++) {
struct pci_dev *dev;
dev = pci_scan_single_device(bus, devfn);
if (dev) {
nr++;
/*
* If this is a single function device,
* don't scan past the first function.
*/
if (!dev->multifunction) {
if (func > 0) {
dev->multifunction = 1;
} else {
break;
}
if ((dev && dev->multifunction) ||
(!dev && pcibios_scan_all_fns(bus, devfn))) {
for (fn = 1; fn < 8; fn++) {
dev = pci_scan_single_device(bus, devfn + fn);
if (dev) {
if (!dev->is_added)
nr++;
dev->multifunction = 1;
}
} else {
if (func == 0 && !scan_all_fns)
break;
}
}
@ -1074,12 +1084,21 @@ unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus)
for (devfn = 0; devfn < 0x100; devfn += 8)
pci_scan_slot(bus, devfn);
/* Reserve buses for SR-IOV capability. */
max += pci_iov_bus_range(bus);
/*
* After performing arch-dependent fixup of the bus, look behind
* all PCI-to-PCI bridges on this bus.
*/
pr_debug("PCI: Fixups for bus %04x:%02x\n", pci_domain_nr(bus), bus->number);
pcibios_fixup_bus(bus);
if (!bus->is_added) {
pr_debug("PCI: Fixups for bus %04x:%02x\n",
pci_domain_nr(bus), bus->number);
pcibios_fixup_bus(bus);
if (pci_is_root_bus(bus))
bus->is_added = 1;
}
for (pass=0; pass < 2; pass++)
list_for_each_entry(dev, &bus->devices, bus_list) {
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
@ -1114,7 +1133,7 @@ struct pci_bus * pci_create_bus(struct device *parent,
if (!b)
return NULL;
dev = kmalloc(sizeof(*dev), GFP_KERNEL);
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev){
kfree(b);
return NULL;
@ -1133,7 +1152,6 @@ struct pci_bus * pci_create_bus(struct device *parent,
list_add_tail(&b->node, &pci_root_buses);
up_write(&pci_bus_sem);
memset(dev, 0, sizeof(*dev));
dev->parent = parent;
dev->release = pci_release_bus_bridge_dev;
dev_set_name(dev, "pci%04x:%02x", pci_domain_nr(b), bus);
@ -1193,6 +1211,38 @@ struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent,
EXPORT_SYMBOL(pci_scan_bus_parented);
#ifdef CONFIG_HOTPLUG
/**
* pci_rescan_bus - scan a PCI bus for devices.
* @bus: PCI bus to scan
*
* Scan a PCI bus and child buses for new devices, adds them,
* and enables them.
*
* Returns the max number of subordinate bus discovered.
*/
unsigned int __devinit pci_rescan_bus(struct pci_bus *bus)
{
unsigned int max;
struct pci_dev *dev;
max = pci_scan_child_bus(bus);
down_read(&pci_bus_sem);
list_for_each_entry(dev, &bus->devices, bus_list)
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
if (dev->subordinate)
pci_bus_size_bridges(dev->subordinate);
up_read(&pci_bus_sem);
pci_bus_assign_resources(bus);
pci_enable_bridges(bus);
pci_bus_add_devices(bus);
return max;
}
EXPORT_SYMBOL_GPL(pci_rescan_bus);
EXPORT_SYMBOL(pci_add_new_bus);
EXPORT_SYMBOL(pci_scan_slot);
EXPORT_SYMBOL(pci_scan_bridge);

221
drivers/pci/quirks.c
Просмотреть файл

@ -24,6 +24,7 @@
#include <linux/kallsyms.h>
#include <linux/dmi.h>
#include <linux/pci-aspm.h>
#include <linux/ioport.h>
#include "pci.h"
int isa_dma_bridge_buggy;
@ -34,6 +35,65 @@ int pcie_mch_quirk;
EXPORT_SYMBOL(pcie_mch_quirk);
#ifdef CONFIG_PCI_QUIRKS
/*
* This quirk function disables the device and releases resources
* which is specified by kernel's boot parameter 'pci=resource_alignment='.
* It also rounds up size to specified alignment.
* Later on, the kernel will assign page-aligned memory resource back
* to that device.
*/
static void __devinit quirk_resource_alignment(struct pci_dev *dev)
{
int i;
struct resource *r;
resource_size_t align, size;
if (!pci_is_reassigndev(dev))
return;
if (dev->hdr_type == PCI_HEADER_TYPE_NORMAL &&
(dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) {
dev_warn(&dev->dev,
"Can't reassign resources to host bridge.\n");
return;
}
dev_info(&dev->dev, "Disabling device and release resources.\n");
pci_disable_device(dev);
align = pci_specified_resource_alignment(dev);
for (i=0; i < PCI_BRIDGE_RESOURCES; i++) {
r = &dev->resource[i];
if (!(r->flags & IORESOURCE_MEM))
continue;
size = resource_size(r);
if (size < align) {
size = align;
dev_info(&dev->dev,
"Rounding up size of resource #%d to %#llx.\n",
i, (unsigned long long)size);
}
r->end = size - 1;
r->start = 0;
}
/* Need to disable bridge's resource window,
* to enable the kernel to reassign new resource
* window later on.
*/
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE &&
(dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
r = &dev->resource[i];
if (!(r->flags & IORESOURCE_MEM))
continue;
r->end = resource_size(r) - 1;
r->start = 0;
}
pci_disable_bridge_window(dev);
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_resource_alignment);
/* The Mellanox Tavor device gives false positive parity errors
* Mark this device with a broken_parity_status, to allow
* PCI scanning code to "skip" this now blacklisted device.
@ -1126,10 +1186,15 @@ static void __init asus_hides_smbus_hostbridge(struct pci_dev *dev)
* its on-board VGA controller */
asus_hides_smbus = 1;
}
else if (dev->device == PCI_DEVICE_ID_INTEL_82845G_IG)
else if (dev->device == PCI_DEVICE_ID_INTEL_82801DB_2)
switch(dev->subsystem_device) {
case 0x00b8: /* Compaq Evo D510 CMT */
case 0x00b9: /* Compaq Evo D510 SFF */
/* Motherboard doesn't have Host bridge
* subvendor/subdevice IDs and on-board VGA
* controller is disabled if an AGP card is
* inserted, therefore checking USB UHCI
* Controller #1 */
asus_hides_smbus = 1;
}
else if (dev->device == PCI_DEVICE_ID_INTEL_82815_CGC)
@ -1154,7 +1219,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82855GM_HB, as
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82915GM_HB, asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82810_IG3, asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82845G_IG, asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_2, asus_hides_smbus_hostbridge);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82815_CGC, asus_hides_smbus_hostbridge);
static void asus_hides_smbus_lpc(struct pci_dev *dev)
@ -1664,9 +1729,13 @@ static void __devinit quirk_netmos(struct pci_dev *dev)
* of parallel ports and <S> is the number of serial ports.
*/
switch (dev->device) {
case PCI_DEVICE_ID_NETMOS_9835:
/* Well, this rule doesn't hold for the following 9835 device */
if (dev->subsystem_vendor == PCI_VENDOR_ID_IBM &&
dev->subsystem_device == 0x0299)
return;
case PCI_DEVICE_ID_NETMOS_9735:
case PCI_DEVICE_ID_NETMOS_9745:
case PCI_DEVICE_ID_NETMOS_9835:
case PCI_DEVICE_ID_NETMOS_9845:
case PCI_DEVICE_ID_NETMOS_9855:
if ((dev->class >> 8) == PCI_CLASS_COMMUNICATION_SERIAL &&
@ -2078,6 +2147,92 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA,
PCI_DEVICE_ID_NVIDIA_NVENET_15,
nvenet_msi_disable);
static int __devinit ht_check_msi_mapping(struct pci_dev *dev)
{
int pos, ttl = 48;
int found = 0;
/* check if there is HT MSI cap or enabled on this device */
pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
while (pos && ttl--) {
u8 flags;
if (found < 1)
found = 1;
if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
&flags) == 0) {
if (flags & HT_MSI_FLAGS_ENABLE) {
if (found < 2) {
found = 2;
break;
}
}
}
pos = pci_find_next_ht_capability(dev, pos,
HT_CAPTYPE_MSI_MAPPING);
}
return found;
}
static int __devinit host_bridge_with_leaf(struct pci_dev *host_bridge)
{
struct pci_dev *dev;
int pos;
int i, dev_no;
int found = 0;
dev_no = host_bridge->devfn >> 3;
for (i = dev_no + 1; i < 0x20; i++) {
dev = pci_get_slot(host_bridge->bus, PCI_DEVFN(i, 0));
if (!dev)
continue;
/* found next host bridge ?*/
pos = pci_find_ht_capability(dev, HT_CAPTYPE_SLAVE);
if (pos != 0) {
pci_dev_put(dev);
break;
}
if (ht_check_msi_mapping(dev)) {
found = 1;
pci_dev_put(dev);
break;
}
pci_dev_put(dev);
}
return found;
}
#define PCI_HT_CAP_SLAVE_CTRL0 4 /* link control */
#define PCI_HT_CAP_SLAVE_CTRL1 8 /* link control to */
static int __devinit is_end_of_ht_chain(struct pci_dev *dev)
{
int pos, ctrl_off;
int end = 0;
u16 flags, ctrl;
pos = pci_find_ht_capability(dev, HT_CAPTYPE_SLAVE);
if (!pos)
goto out;
pci_read_config_word(dev, pos + PCI_CAP_FLAGS, &flags);
ctrl_off = ((flags >> 10) & 1) ?
PCI_HT_CAP_SLAVE_CTRL0 : PCI_HT_CAP_SLAVE_CTRL1;
pci_read_config_word(dev, pos + ctrl_off, &ctrl);
if (ctrl & (1 << 6))
end = 1;
out:
return end;
}
static void __devinit nv_ht_enable_msi_mapping(struct pci_dev *dev)
{
struct pci_dev *host_bridge;
@ -2102,6 +2257,11 @@ static void __devinit nv_ht_enable_msi_mapping(struct pci_dev *dev)
if (!found)
return;
/* don't enable end_device/host_bridge with leaf directly here */
if (host_bridge == dev && is_end_of_ht_chain(host_bridge) &&
host_bridge_with_leaf(host_bridge))
goto out;
/* root did that ! */
if (msi_ht_cap_enabled(host_bridge))
goto out;
@ -2132,44 +2292,12 @@ static void __devinit ht_disable_msi_mapping(struct pci_dev *dev)
}
}
static int __devinit ht_check_msi_mapping(struct pci_dev *dev)
{
int pos, ttl = 48;
int found = 0;
/* check if there is HT MSI cap or enabled on this device */
pos = pci_find_ht_capability(dev, HT_CAPTYPE_MSI_MAPPING);
while (pos && ttl--) {
u8 flags;
if (found < 1)
found = 1;
if (pci_read_config_byte(dev, pos + HT_MSI_FLAGS,
&flags) == 0) {
if (flags & HT_MSI_FLAGS_ENABLE) {
if (found < 2) {
found = 2;
break;
}
}
}
pos = pci_find_next_ht_capability(dev, pos,
HT_CAPTYPE_MSI_MAPPING);
}
return found;
}
static void __devinit nv_msi_ht_cap_quirk(struct pci_dev *dev)
static void __devinit __nv_msi_ht_cap_quirk(struct pci_dev *dev, int all)
{
struct pci_dev *host_bridge;
int pos;
int found;
/* Enabling HT MSI mapping on this device breaks MCP51 */
if (dev->device == 0x270)
return;
/* check if there is HT MSI cap or enabled on this device */
found = ht_check_msi_mapping(dev);
@ -2193,7 +2321,10 @@ static void __devinit nv_msi_ht_cap_quirk(struct pci_dev *dev)
/* Host bridge is to HT */
if (found == 1) {
/* it is not enabled, try to enable it */
nv_ht_enable_msi_mapping(dev);
if (all)
ht_enable_msi_mapping(dev);
else
nv_ht_enable_msi_mapping(dev);
}
return;
}
@ -2205,8 +2336,20 @@ static void __devinit nv_msi_ht_cap_quirk(struct pci_dev *dev)
/* Host bridge is not to HT, disable HT MSI mapping on this device */
ht_disable_msi_mapping(dev);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk);
static void __devinit nv_msi_ht_cap_quirk_all(struct pci_dev *dev)
{
return __nv_msi_ht_cap_quirk(dev, 1);
}
static void __devinit nv_msi_ht_cap_quirk_leaf(struct pci_dev *dev)
{
return __nv_msi_ht_cap_quirk(dev, 0);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, nv_msi_ht_cap_quirk_leaf);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_ANY_ID, nv_msi_ht_cap_quirk_all);
static void __devinit quirk_msi_intx_disable_bug(struct pci_dev *dev)
{

4
drivers/pci/remove.c
Просмотреть файл

@ -71,6 +71,9 @@ void pci_remove_bus(struct pci_bus *pci_bus)
down_write(&pci_bus_sem);
list_del(&pci_bus->node);
up_write(&pci_bus_sem);
if (!pci_bus->is_added)
return;
pci_remove_legacy_files(pci_bus);
device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
device_remove_file(&pci_bus->dev, &dev_attr_cpulistaffinity);
@ -92,6 +95,7 @@ EXPORT_SYMBOL(pci_remove_bus);
*/
void pci_remove_bus_device(struct pci_dev *dev)
{
pci_stop_bus_device(dev);
if (dev->subordinate) {
struct pci_bus *b = dev->subordinate;

2
drivers/pci/search.c
Просмотреть файл

@ -29,7 +29,7 @@ pci_find_upstream_pcie_bridge(struct pci_dev *pdev)
if (pdev->is_pcie)
return NULL;
while (1) {
if (!pdev->bus->self)
if (!pdev->bus->parent)
break;
pdev = pdev->bus->self;
/* a p2p bridge */

7
drivers/pci/setup-bus.c
Просмотреть файл

@ -27,7 +27,7 @@
#include <linux/slab.h>
static void pbus_assign_resources_sorted(struct pci_bus *bus)
static void pbus_assign_resources_sorted(const struct pci_bus *bus)
{
struct pci_dev *dev;
struct resource *res;
@ -144,6 +144,9 @@ static void pci_setup_bridge(struct pci_bus *bus)
struct pci_bus_region region;
u32 l, bu, lu, io_upper16;
if (!pci_is_root_bus(bus) && bus->is_added)
return;
dev_info(&bridge->dev, "PCI bridge, secondary bus %04x:%02x\n",
pci_domain_nr(bus), bus->number);
@ -495,7 +498,7 @@ void __ref pci_bus_size_bridges(struct pci_bus *bus)
}
EXPORT_SYMBOL(pci_bus_size_bridges);
void __ref pci_bus_assign_resources(struct pci_bus *bus)
void __ref pci_bus_assign_resources(const struct pci_bus *bus)
{
struct pci_bus *b;
struct pci_dev *dev;

15
drivers/pci/setup-res.c
Просмотреть файл

@ -120,6 +120,21 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
return err;
}
#ifdef CONFIG_PCI_QUIRKS
void pci_disable_bridge_window(struct pci_dev *dev)
{
dev_dbg(&dev->dev, "Disabling bridge window.\n");
/* MMIO Base/Limit */
pci_write_config_dword(dev, PCI_MEMORY_BASE, 0x0000fff0);
/* Prefetchable MMIO Base/Limit */
pci_write_config_dword(dev, PCI_PREF_LIMIT_UPPER32, 0);
pci_write_config_dword(dev, PCI_PREF_MEMORY_BASE, 0x0000fff0);
pci_write_config_dword(dev, PCI_PREF_BASE_UPPER32, 0xffffffff);
}
#endif /* CONFIG_PCI_QUIRKS */
int pci_assign_resource(struct pci_dev *dev, int resno)
{
struct pci_bus *bus = dev->bus;

18
drivers/pci/slot.c
Просмотреть файл

@ -1,8 +1,8 @@
/*
* drivers/pci/slot.c
* Copyright (C) 2006 Matthew Wilcox <matthew@wil.cx>
* Copyright (C) 2006-2008 Hewlett-Packard Development Company, L.P.
* Alex Chiang <achiang@hp.com>
* Copyright (C) 2006-2009 Hewlett-Packard Development Company, L.P.
* Alex Chiang <achiang@hp.com>
*/
#include <linux/kobject.h>
@ -52,8 +52,8 @@ static void pci_slot_release(struct kobject *kobj)
struct pci_dev *dev;
struct pci_slot *slot = to_pci_slot(kobj);
pr_debug("%s: releasing pci_slot on %x:%d\n", __func__,
slot->bus->number, slot->number);
dev_dbg(&slot->bus->dev, "dev %02x, released physical slot %s\n",
slot->number, pci_slot_name(slot));
list_for_each_entry(dev, &slot->bus->devices, bus_list)
if (PCI_SLOT(dev->devfn) == slot->number)
@ -248,9 +248,8 @@ placeholder:
if (PCI_SLOT(dev->devfn) == slot_nr)
dev->slot = slot;
/* Don't care if debug printk has a -1 for slot_nr */
pr_debug("%s: created pci_slot on %04x:%02x:%02x\n",
__func__, pci_domain_nr(parent), parent->number, slot_nr);
dev_dbg(&parent->dev, "dev %02x, created physical slot %s\n",
slot_nr, pci_slot_name(slot));
out:
kfree(slot_name);
@ -299,9 +298,8 @@ EXPORT_SYMBOL_GPL(pci_renumber_slot);
*/
void pci_destroy_slot(struct pci_slot *slot)
{
pr_debug("%s: dec refcount to %d on %04x:%02x:%02x\n", __func__,
atomic_read(&slot->kobj.kref.refcount) - 1,
pci_domain_nr(slot->bus), slot->bus->number, slot->number);
dev_dbg(&slot->bus->dev, "dev %02x, dec refcount to %d\n",
slot->number, atomic_read(&slot->kobj.kref.refcount) - 1);
down_write(&pci_bus_sem);
kobject_put(&slot->kobj);

34
include/linux/acpi.h
Просмотреть файл

@ -257,6 +257,40 @@ void __init acpi_no_s4_hw_signature(void);
void __init acpi_old_suspend_ordering(void);
void __init acpi_s4_no_nvs(void);
#endif /* CONFIG_PM_SLEEP */
#define OSC_QUERY_TYPE 0
#define OSC_SUPPORT_TYPE 1
#define OSC_CONTROL_TYPE 2
#define OSC_SUPPORT_MASKS 0x1f
/* _OSC DW0 Definition */
#define OSC_QUERY_ENABLE 1
#define OSC_REQUEST_ERROR 2
#define OSC_INVALID_UUID_ERROR 4
#define OSC_INVALID_REVISION_ERROR 8
#define OSC_CAPABILITIES_MASK_ERROR 16
/* _OSC DW1 Definition (OS Support Fields) */
#define OSC_EXT_PCI_CONFIG_SUPPORT 1
#define OSC_ACTIVE_STATE_PWR_SUPPORT 2
#define OSC_CLOCK_PWR_CAPABILITY_SUPPORT 4
#define OSC_PCI_SEGMENT_GROUPS_SUPPORT 8
#define OSC_MSI_SUPPORT 16
/* _OSC DW1 Definition (OS Control Fields) */
#define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 1
#define OSC_SHPC_NATIVE_HP_CONTROL 2
#define OSC_PCI_EXPRESS_PME_CONTROL 4
#define OSC_PCI_EXPRESS_AER_CONTROL 8
#define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL 16
#define OSC_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \
OSC_SHPC_NATIVE_HP_CONTROL | \
OSC_PCI_EXPRESS_PME_CONTROL | \
OSC_PCI_EXPRESS_AER_CONTROL | \
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL)
extern acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags);
#else /* CONFIG_ACPI */
static inline int early_acpi_boot_init(void)

13
include/linux/msi.h
Просмотреть файл

@ -20,20 +20,23 @@ extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
struct msi_desc {
struct {
__u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
__u8 is_msix : 1;
__u8 multiple: 3; /* log2 number of messages */
__u8 maskbit : 1; /* mask-pending bit supported ? */
__u8 masked : 1;
__u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
__u8 pos; /* Location of the msi capability */
__u32 maskbits_mask; /* mask bits mask */
__u16 entry_nr; /* specific enabled entry */
unsigned default_irq; /* default pre-assigned irq */
}msi_attrib;
} msi_attrib;
u32 masked; /* mask bits */
unsigned int irq;
struct list_head list;
void __iomem *mask_base;
union {
void __iomem *mask_base;
u8 mask_pos;
};
struct pci_dev *dev;
/* Last set MSI message */

67
include/linux/pci-acpi.h
Просмотреть файл

@ -10,72 +10,25 @@
#include <linux/acpi.h>
#define OSC_QUERY_TYPE 0
#define OSC_SUPPORT_TYPE 1
#define OSC_CONTROL_TYPE 2
#define OSC_SUPPORT_MASKS 0x1f
/*
* _OSC DW0 Definition
*/
#define OSC_QUERY_ENABLE 1
#define OSC_REQUEST_ERROR 2
#define OSC_INVALID_UUID_ERROR 4
#define OSC_INVALID_REVISION_ERROR 8
#define OSC_CAPABILITIES_MASK_ERROR 16
/*
* _OSC DW1 Definition (OS Support Fields)
*/
#define OSC_EXT_PCI_CONFIG_SUPPORT 1
#define OSC_ACTIVE_STATE_PWR_SUPPORT 2
#define OSC_CLOCK_PWR_CAPABILITY_SUPPORT 4
#define OSC_PCI_SEGMENT_GROUPS_SUPPORT 8
#define OSC_MSI_SUPPORT 16
/*
* _OSC DW1 Definition (OS Control Fields)
*/
#define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL 1
#define OSC_SHPC_NATIVE_HP_CONTROL 2
#define OSC_PCI_EXPRESS_PME_CONTROL 4
#define OSC_PCI_EXPRESS_AER_CONTROL 8
#define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL 16
#define OSC_CONTROL_MASKS (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | \
OSC_SHPC_NATIVE_HP_CONTROL | \
OSC_PCI_EXPRESS_PME_CONTROL | \
OSC_PCI_EXPRESS_AER_CONTROL | \
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL)
#ifdef CONFIG_ACPI
extern acpi_status pci_osc_control_set(acpi_handle handle, u32 flags);
int pci_acpi_osc_support(acpi_handle handle, u32 flags);
static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
{
/* Find root host bridge */
while (pdev->bus->self)
pdev = pdev->bus->self;
return acpi_get_pci_rootbridge_handle(pci_domain_nr(pdev->bus),
pdev->bus->number);
struct pci_bus *pbus = pdev->bus;
/* Find a PCI root bus */
while (pbus->parent)
pbus = pbus->parent;
return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus),
pbus->number);
}
static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
{
int seg = pci_domain_nr(pbus), busnr = pbus->number;
struct pci_dev *bridge = pbus->self;
if (bridge)
return DEVICE_ACPI_HANDLE(&(bridge->dev));
return acpi_get_pci_rootbridge_handle(seg, busnr);
if (pbus->parent)
return DEVICE_ACPI_HANDLE(&(pbus->self->dev));
return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus),
pbus->number);
}
#else
#if !defined(AE_ERROR)
typedef u32 acpi_status;
#define AE_ERROR (acpi_status) (0x0001)
#endif
static inline acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{return AE_ERROR;}
static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
{ return NULL; }
#endif

61
include/linux/pci.h
Просмотреть файл

@ -52,6 +52,7 @@
#include <asm/atomic.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/irqreturn.h>
/* Include the ID list */
#include <linux/pci_ids.h>
@ -93,6 +94,12 @@ enum {
/* #6: expansion ROM resource */
PCI_ROM_RESOURCE,
/* device specific resources */
#ifdef CONFIG_PCI_IOV
PCI_IOV_RESOURCES,
PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
#endif
/* resources assigned to buses behind the bridge */
#define PCI_BRIDGE_RESOURCE_NUM 4
@ -180,6 +187,7 @@ struct pci_cap_saved_state {
struct pcie_link_state;
struct pci_vpd;
struct pci_sriov;
/*
* The pci_dev structure is used to describe PCI devices.
@ -257,6 +265,8 @@ struct pci_dev {
unsigned int is_managed:1;
unsigned int is_pcie:1;
unsigned int state_saved:1;
unsigned int is_physfn:1;
unsigned int is_virtfn:1;
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */
@ -270,6 +280,12 @@ struct pci_dev {
struct list_head msi_list;
#endif
struct pci_vpd *vpd;
#ifdef CONFIG_PCI_IOV
union {
struct pci_sriov *sriov; /* SR-IOV capability related */
struct pci_dev *physfn; /* the PF this VF is associated with */
};
#endif
};
extern struct pci_dev *alloc_pci_dev(void);
@ -341,6 +357,15 @@ struct pci_bus {
#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
/*
* Returns true if the pci bus is root (behind host-pci bridge),
* false otherwise
*/
static inline bool pci_is_root_bus(struct pci_bus *pbus)
{
return !(pbus->parent);
}
#ifdef CONFIG_PCI_MSI
static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
{
@ -528,7 +553,7 @@ void pcibios_update_irq(struct pci_dev *, int irq);
/* Generic PCI functions used internally */
extern struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(struct pci_bus *bus);
void pci_bus_add_devices(const struct pci_bus *bus);
struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata);
static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
@ -702,6 +727,9 @@ int pci_back_from_sleep(struct pci_dev *dev);
/* Functions for PCI Hotplug drivers to use */
int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
#ifdef CONFIG_HOTPLUG
unsigned int pci_rescan_bus(struct pci_bus *bus);
#endif
/* Vital product data routines */
ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
@ -709,7 +737,7 @@ ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void
int pci_vpd_truncate(struct pci_dev *dev, size_t size);
/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
void pci_bus_assign_resources(struct pci_bus *bus);
void pci_bus_assign_resources(const struct pci_bus *bus);
void pci_bus_size_bridges(struct pci_bus *bus);
int pci_claim_resource(struct pci_dev *, int);
void pci_assign_unassigned_resources(void);
@ -790,7 +818,7 @@ struct msix_entry {
#ifndef CONFIG_PCI_MSI
static inline int pci_enable_msi(struct pci_dev *dev)
static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
{
return -1;
}
@ -800,6 +828,10 @@ static inline void pci_msi_shutdown(struct pci_dev *dev)
static inline void pci_disable_msi(struct pci_dev *dev)
{ }
static inline int pci_msix_table_size(struct pci_dev *dev)
{
return 0;
}
static inline int pci_enable_msix(struct pci_dev *dev,
struct msix_entry *entries, int nvec)
{
@ -821,9 +853,10 @@ static inline int pci_msi_enabled(void)
return 0;
}
#else
extern int pci_enable_msi(struct pci_dev *dev);
extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
extern void pci_msi_shutdown(struct pci_dev *dev);
extern void pci_disable_msi(struct pci_dev *dev);
extern int pci_msix_table_size(struct pci_dev *dev);
extern int pci_enable_msix(struct pci_dev *dev,
struct msix_entry *entries, int nvec);
extern void pci_msix_shutdown(struct pci_dev *dev);
@ -842,6 +875,8 @@ static inline int pcie_aspm_enabled(void)
extern int pcie_aspm_enabled(void);
#endif
#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
#ifdef CONFIG_HT_IRQ
/* The functions a driver should call */
int ht_create_irq(struct pci_dev *dev, int idx);
@ -1195,5 +1230,23 @@ int pci_ext_cfg_avail(struct pci_dev *dev);
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
#ifdef CONFIG_PCI_IOV
extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
extern void pci_disable_sriov(struct pci_dev *dev);
extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
#else
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{
return -ENODEV;
}
static inline void pci_disable_sriov(struct pci_dev *dev)
{
}
static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
{
return IRQ_NONE;
}
#endif
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */

1
include/linux/pci_ids.h
Просмотреть файл

@ -2396,6 +2396,7 @@
#define PCI_DEVICE_ID_INTEL_82801CA_12 0x248c
#define PCI_DEVICE_ID_INTEL_82801DB_0 0x24c0
#define PCI_DEVICE_ID_INTEL_82801DB_1 0x24c1
#define PCI_DEVICE_ID_INTEL_82801DB_2 0x24c2
#define PCI_DEVICE_ID_INTEL_82801DB_3 0x24c3
#define PCI_DEVICE_ID_INTEL_82801DB_5 0x24c5
#define PCI_DEVICE_ID_INTEL_82801DB_6 0x24c6

37
include/linux/pci_regs.h
Просмотреть файл

@ -235,7 +235,7 @@
#define PCI_PM_CAP_PME_SHIFT 11 /* Start of the PME Mask in PMC */
#define PCI_PM_CTRL 4 /* PM control and status register */
#define PCI_PM_CTRL_STATE_MASK 0x0003 /* Current power state (D0 to D3) */
#define PCI_PM_CTRL_NO_SOFT_RESET 0x0004 /* No reset for D3hot->D0 */
#define PCI_PM_CTRL_NO_SOFT_RESET 0x0008 /* No reset for D3hot->D0 */
#define PCI_PM_CTRL_PME_ENABLE 0x0100 /* PME pin enable */
#define PCI_PM_CTRL_DATA_SEL_MASK 0x1e00 /* Data select (??) */
#define PCI_PM_CTRL_DATA_SCALE_MASK 0x6000 /* Data scale (??) */
@ -375,6 +375,7 @@
#define PCI_EXP_TYPE_UPSTREAM 0x5 /* Upstream Port */
#define PCI_EXP_TYPE_DOWNSTREAM 0x6 /* Downstream Port */
#define PCI_EXP_TYPE_PCI_BRIDGE 0x7 /* PCI/PCI-X Bridge */
#define PCI_EXP_TYPE_RC_END 0x9 /* Root Complex Integrated Endpoint */
#define PCI_EXP_FLAGS_SLOT 0x0100 /* Slot implemented */
#define PCI_EXP_FLAGS_IRQ 0x3e00 /* Interrupt message number */
#define PCI_EXP_DEVCAP 4 /* Device capabilities */
@ -487,6 +488,8 @@
#define PCI_EXP_DEVCAP2_ARI 0x20 /* Alternative Routing-ID */
#define PCI_EXP_DEVCTL2 40 /* Device Control 2 */
#define PCI_EXP_DEVCTL2_ARI 0x20 /* Alternative Routing-ID */
#define PCI_EXP_LNKCTL2 48 /* Link Control 2 */
#define PCI_EXP_SLTCTL2 56 /* Slot Control 2 */
/* Extended Capabilities (PCI-X 2.0 and Express) */
#define PCI_EXT_CAP_ID(header) (header & 0x0000ffff)
@ -498,6 +501,7 @@
#define PCI_EXT_CAP_ID_DSN 3
#define PCI_EXT_CAP_ID_PWR 4
#define PCI_EXT_CAP_ID_ARI 14
#define PCI_EXT_CAP_ID_SRIOV 16
/* Advanced Error Reporting */
#define PCI_ERR_UNCOR_STATUS 4 /* Uncorrectable Error Status */
@ -615,4 +619,35 @@
#define PCI_ARI_CTRL_ACS 0x0002 /* ACS Function Groups Enable */
#define PCI_ARI_CTRL_FG(x) (((x) >> 4) & 7) /* Function Group */
/* Single Root I/O Virtualization */
#define PCI_SRIOV_CAP 0x04 /* SR-IOV Capabilities */
#define PCI_SRIOV_CAP_VFM 0x01 /* VF Migration Capable */
#define PCI_SRIOV_CAP_INTR(x) ((x) >> 21) /* Interrupt Message Number */
#define PCI_SRIOV_CTRL 0x08 /* SR-IOV Control */
#define PCI_SRIOV_CTRL_VFE 0x01 /* VF Enable */
#define PCI_SRIOV_CTRL_VFM 0x02 /* VF Migration Enable */
#define PCI_SRIOV_CTRL_INTR 0x04 /* VF Migration Interrupt Enable */
#define PCI_SRIOV_CTRL_MSE 0x08 /* VF Memory Space Enable */
#define PCI_SRIOV_CTRL_ARI 0x10 /* ARI Capable Hierarchy */
#define PCI_SRIOV_STATUS 0x0a /* SR-IOV Status */
#define PCI_SRIOV_STATUS_VFM 0x01 /* VF Migration Status */
#define PCI_SRIOV_INITIAL_VF 0x0c /* Initial VFs */
#define PCI_SRIOV_TOTAL_VF 0x0e /* Total VFs */
#define PCI_SRIOV_NUM_VF 0x10 /* Number of VFs */
#define PCI_SRIOV_FUNC_LINK 0x12 /* Function Dependency Link */
#define PCI_SRIOV_VF_OFFSET 0x14 /* First VF Offset */
#define PCI_SRIOV_VF_STRIDE 0x16 /* Following VF Stride */
#define PCI_SRIOV_VF_DID 0x1a /* VF Device ID */
#define PCI_SRIOV_SUP_PGSIZE 0x1c /* Supported Page Sizes */
#define PCI_SRIOV_SYS_PGSIZE 0x20 /* System Page Size */
#define PCI_SRIOV_BAR 0x24 /* VF BAR0 */
#define PCI_SRIOV_NUM_BARS 6 /* Number of VF BARs */
#define PCI_SRIOV_VFM 0x3c /* VF Migration State Array Offset*/
#define PCI_SRIOV_VFM_BIR(x) ((x) & 7) /* State BIR */
#define PCI_SRIOV_VFM_OFFSET(x) ((x) & ~7) /* State Offset */
#define PCI_SRIOV_VFM_UA 0x0 /* Inactive.Unavailable */
#define PCI_SRIOV_VFM_MI 0x1 /* Dormant.MigrateIn */
#define PCI_SRIOV_VFM_MO 0x2 /* Active.MigrateOut */
#define PCI_SRIOV_VFM_AV 0x3 /* Active.Available */
#endif /* LINUX_PCI_REGS_H */

36
include/linux/pcieport_if.h
Просмотреть файл

@ -16,29 +16,30 @@
#define PCIE_ANY_PORT 7
/* Service Type */
#define PCIE_PORT_SERVICE_PME 1 /* Power Management Event */
#define PCIE_PORT_SERVICE_AER 2 /* Advanced Error Reporting */
#define PCIE_PORT_SERVICE_HP 4 /* Native Hotplug */
#define PCIE_PORT_SERVICE_VC 8 /* Virtual Channel */
#define PCIE_PORT_SERVICE_PME_SHIFT 0 /* Power Management Event */
#define PCIE_PORT_SERVICE_PME (1 << PCIE_PORT_SERVICE_PME_SHIFT)
#define PCIE_PORT_SERVICE_AER_SHIFT 1 /* Advanced Error Reporting */
#define PCIE_PORT_SERVICE_AER (1 << PCIE_PORT_SERVICE_AER_SHIFT)
#define PCIE_PORT_SERVICE_HP_SHIFT 2 /* Native Hotplug */
#define PCIE_PORT_SERVICE_HP (1 << PCIE_PORT_SERVICE_HP_SHIFT)
#define PCIE_PORT_SERVICE_VC_SHIFT 3 /* Virtual Channel */
#define PCIE_PORT_SERVICE_VC (1 << PCIE_PORT_SERVICE_VC_SHIFT)
/* Root/Upstream/Downstream Port's Interrupt Mode */
#define PCIE_PORT_NO_IRQ (-1)
#define PCIE_PORT_INTx_MODE 0
#define PCIE_PORT_MSI_MODE 1
#define PCIE_PORT_MSIX_MODE 2
struct pcie_port_service_id {
__u32 vendor, device; /* Vendor and device ID or PCI_ANY_ID*/
__u32 subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
__u32 class, class_mask; /* (class,subclass,prog-if) triplet */
__u32 port_type, service_type; /* Port Entity */
kernel_ulong_t driver_data;
struct pcie_port_data {
int port_type; /* Type of the port */
int port_irq_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
};
struct pcie_device {
int irq; /* Service IRQ/MSI/MSI-X Vector */
int interrupt_mode; /* [0:INTx | 1:MSI | 2:MSI-X] */
struct pcie_port_service_id id; /* Service ID */
struct pci_dev *port; /* Root/Upstream/Downstream Port */
struct pci_dev *port; /* Root/Upstream/Downstream Port */
u32 service; /* Port service this device represents */
void *priv_data; /* Service Private Data */
struct device device; /* Generic Device Interface */
};
@ -56,10 +57,9 @@ static inline void* get_service_data(struct pcie_device *dev)
struct pcie_port_service_driver {
const char *name;
int (*probe) (struct pcie_device *dev,
const struct pcie_port_service_id *id);
int (*probe) (struct pcie_device *dev);
void (*remove) (struct pcie_device *dev);
int (*suspend) (struct pcie_device *dev, pm_message_t state);
int (*suspend) (struct pcie_device *dev);
int (*resume) (struct pcie_device *dev);
/* Service Error Recovery Handler */
@ -68,7 +68,9 @@ struct pcie_port_service_driver {
/* Link Reset Capability - AER service driver specific */
pci_ers_result_t (*reset_link) (struct pci_dev *dev);
const struct pcie_port_service_id *id_table;
int port_type; /* Type of the port this driver can handle */
u32 service; /* Port service this device represents */
struct device_driver driver;
};
#define to_service_driver(d) \