linux-toradex.git/drivers/pci/probe.c, branch v2.6.30-rc8

x86/PCI: Move set_pci_bus_resources_arch_default into arch/x86

2009-04-22T20:57:36+00:00

Commit 30a18d6c3f1e774de656ebd8ff219d53e2ba4029 introduced a new
function to set the PCI bus resources.  Unfortunately, neither the
author, nor the committers seemed to know that we already have somewhere
to do that -- pcibios_fixup_bus().  This patch moves the hook (used only
by the K8 code) into x86-specific code where it should have been in the
first place.

Cc: Yinghai Lu 
Signed-off-by: Matthew Wilcox 
Acked-by: Ingo Molnar 
Signed-off-by: Jesse Barnes

PCI: annotate pci_rescan_bus as ref, not devinit

2009-04-06T18:26:07+00:00

pci_rescan_bus was annotated as __devinit, which is wrong,
because it will never be part of device initialization.
Howevever, we can't simply drop the annotation, because then we
get section warnings about calling pci_scan_child_bus (which is
correctly marked as __devinit).

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

Annotate as __ref to silence modpost.

Signed-off-by: Alex Chiang 
Signed-off-by: Jesse Barnes

PCI: fix conflict between SR-IOV and config space sizing

2009-03-26T22:50:18+00:00

New pci_cfg_space_size() needs invalid pdev->class, put it in the
right place in the pci_setup_device().

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

PCI: Introduce /sys/bus/pci/rescan

2009-03-20T21:57:58+00:00

This interface allows the user to force a rescan of all PCI buses
in system, and rediscover devices that have been removed earlier.

pci_bus_attrs implementation from Trent Piepho.

Thanks to Vegard Nossum for discovering locking issues with the
sysfs interface.

Cc: Trent Piepho 
Signed-off-by: Alex Chiang 
Signed-off-by: Jesse Barnes

PCI: Introduce pci_rescan_bus()

2009-03-20T21:57:44+00:00

This API is used by the PCI core to rescan a bus and rediscover
newly added devices.

Over time, it is expected that the various PCI hotplug drivers
will migrate to this interface and away from the old
pci_do_scan_bus() interface.

Signed-off-by: Alex Chiang 
Signed-off-by: Jesse Barnes

PCI: always scan child buses

2009-03-20T21:57:21+00:00

While scanning bridges, we stop our scan if we encounter a bus
that we've seen before, to work around some buggy chipsets. This
is a good idea, but prevents us from fully scanning the PCI bus
at a future time (to find newly hot-added devices, for example).

Change the logic so that we skip _re-adding_ an existing bus
that we've seen before, but also allow the scan to descend to
all child buses.

Now that we're potentially scanning our child buses again, we
also need to be sure not to attempt re-initializing their BARs
so we avoid that.

This patch lays the groundwork to allow the user to issue a
rescan of the PCI bus at any time.

Signed-off-by: Alex Chiang 
Signed-off-by: Jesse Barnes

PCI: pci_scan_slot() returns newly found devices

2009-03-20T21:57:05+00:00

pci_scan_slot() has been rewritten to be less complex and will now
return the number of *new* devices found.

Existing callers need not worry because they already assume that
they can't call pci_scan_slot() on an already-scanned slot.

Thus, there is no semantic change for existing callers: returning
newly found devices (this patch) is exactly equal to returning all
found devices (before this patch).

This patch adds some more groundwork to allow us to rescan the
PCI bus during runtime to discover newly added devices.

Signed-off-by: Trent Piepho 
Reviewed-by: Alex Chiang 
Signed-off-by: Alex Chiang 
Signed-off-by: Jesse Barnes

PCI: don't scan existing devices

2009-03-20T21:56:45+00:00

pci_scan_single_device is supposed to add newly discovered
devices to pci_bus->devices, but doesn't check to see if the
device has already been added. This can cause problems if we ever
want to use this interface to rescan the PCI bus.

If the device is already added, just return it.

Signed-off-by: Trent Piepho 
Signed-off-by: Alex Chiang 
Signed-off-by: Jesse Barnes

PCI: centralize device setup code

2009-03-20T17:48:25+00:00

Move the device setup stuff into pci_setup_device() which will be used
to setup the Virtual Function later.

Reviewed-by: Matthew Wilcox 
Signed-off-by: Yu Zhao 
Signed-off-by: Jesse Barnes

PCI: reserve bus range for SR-IOV device

2009-03-20T17:48:24+00:00

Reserve the bus number range used by the Virtual Function when
pcibios_assign_all_busses() returns true.

Reviewed-by: Matthew Wilcox 
Signed-off-by: Yu Zhao 
Signed-off-by: Jesse Barnes