linux-toradex.git/include/linux/pci.h, branch tegra-9.12.10

PCI: return error on failure to read PCI ROMs

2009-02-05T00:58:41+00:00

This patch makes the ROM reading code return an error to user space if
the size of the ROM read is equal to 0.

The patch also emits a warnings if the contents of the ROM are invalid,
and documents the effects of the "enable" file on ROM reading.

Signed-off-by: Timothy S. Nelson 
Acked-by: Alex Villacis-Lasso 
Signed-off-by: Jesse Barnes

PCI PM: Restore standard config registers of all devices early

2009-01-16T20:57:58+00:00

There is a problem in our handling of suspend-resume of PCI devices that
many of them have their standard config registers restored with
interrupts enabled and they are put into the full power state with
interrupts enabled as well.  This may lead to the following scenario:
  * an interrupt vector is shared between two or more devices
  * one device is resumed earlier and generates an interrupt
  * the interrupt handler of another device tries to handle it and
    attempts to access the device the config space of which hasn't been
    restored yet and/or which still is in a low power state
  * the system crashes as a result

To prevent this from happening we should restore the standard
configuration registers of all devices with interrupts disabled and we
should put them into the D0 power state right after that.
Unfortunately, this cannot be done using the existing
pci_set_power_state(), because it can sleep.  Also, to do it we have to
make sure that the config spaces of all devices were actually saved
during suspend.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Linus Torvalds 
Signed-off-by: Jesse Barnes

x86/PCI: Do not use interrupt links for devices using MSI-X

2009-01-07T19:13:25+00:00

pcibios_enable_device() and pcibios_disable_device() don't handle
IRQs for devices that have MSI enabled and it should treat the
devices with MSI-X enabled in the same way.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Ingo Molnar 
Signed-off-by: Jesse Barnes

PCI: Add pci_clear_master() as opposite of pci_set_master()

2009-01-07T19:13:23+00:00

During an online device reset it may be useful to disable bus-mastering.
pci_disable_device() does that, and far more besides, so is not suitable
for an online reset.

Add pci_clear_master() which does just this.

Signed-off-by: Ben Hutchings 
Reviewed-by: Matthew Wilcox 
Signed-off-by: Jesse Barnes

PCI: add interface to set visible size of VPD

2009-01-07T19:13:18+00:00

The VPD on all devices may not be 32K. Unfortunately, there is no
generic way to find the size, so this adds a simple API hook
to reset it.

Signed-off-by: Stephen Hemminger 
Signed-off-by: Jesse Barnes

PCI: revise VPD access interface

2009-01-07T19:13:17+00:00

Change PCI VPD API which was only used by sysfs to something usable
in drivers.
   * move iteration over multiple words to the low level
   * use conventional types for arguments
   * add exportable wrapper

Signed-off-by: Stephen Hemminger 
Signed-off-by: Jesse Barnes

PCI: add pci_common_swizzle() for INTx swizzling

2009-01-07T19:13:12+00:00

This patch adds pci_common_swizzle(), which swizzles INTx values all the
way up to a root bridge.

This common implementation can replace several architecture-specific
ones.  This should someday be combined with pci_get_interrupt_pin(),
but I left it separate for now to make reviewing easier.

Signed-off-by: Bjorn Helgaas 
Signed-off-by: Jesse Barnes

PCI: define PCI resource names in an 'enum'

2009-01-07T19:13:01+00:00

This patch moves all definitions of the PCI resource names to an 'enum',
and also replaces some hard-coded resource variables with symbol
names. This change eases introduction of device specific resources.

Reviewed-by: Bjorn Helgaas 
Signed-off-by: Yu Zhao 
Signed-off-by: Jesse Barnes

PCI: remove unnecessary arg of pci_update_resource()

2009-01-07T19:13:00+00:00

This cleanup removes unnecessary argument 'struct resource *res' in
pci_update_resource(), so it takes same arguments as other companion
functions (pci_assign_resource(), etc.).

Signed-off-by: Yu Zhao 
Signed-off-by: Jesse Barnes

PCI: uninline pci_ioremap_bar()

2009-01-07T19:12:57+00:00

It's too large to be inlined.

Acked-by: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Jesse Barnes