linux-toradex.git/arch/powerpc/kernel/pci_of_scan.c, branch v3.4.2

powerpc/PCI: convert devtree bus addresses to resource

2012-03-20T17:41:51+00:00

Normal PCI enumeration via PCI config space uses __pci_read_base(), where
the PCI core applies any bus-to-resource offset.  But powerpc doesn't use
that path when enumerating via the device tree.

In 6c5705fec63d, I converted powerpc to use the PCI core bus-to-resource
conversion, but I missed these powerpc-specific paths.  Some powerpc
platforms fail to boot ("Cannot allocate resource region," "device not
available," etc.) between that commit and this one.

This adds the corresponding bus-to-resource conversion in the paths that
read BAR values from the OF device tree.

CC: Anton Blanchard 
CC: Benjamin Herrenschmidt 
CC: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Bjorn Helgaas 
Signed-off-by: Jesse Barnes

powerpc: add export.h to files making use of EXPORT_SYMBOL

2011-10-31T23:30:37+00:00

With module.h being implicitly everywhere via device.h, the absence
of explicitly including something for EXPORT_SYMBOL went unnoticed.
Since we are heading to fix things up and clean module.h from the
device.h file, we need to explicitly include these files now.

Signed-off-by: Paul Gortmaker

pci/of: Match PCI devices to OF nodes dynamically

2011-06-07T23:08:17+00:00

powerpc has two different ways of matching PCI devices to their
corresponding OF node (if any) for historical reasons. The ppc64 one
does a scan looking for matching bus/dev/fn, while the ppc32 one does a
scan looking only for matching dev/fn on each level in order to be
agnostic to busses being renumbered (which Linux does on some
platforms).

This removes both and instead moves the matching code to the PCI core
itself. It's the most logical place to do it: when a pci_dev is created,
we know the parent and thus can do a single level scan for the matching
device_node (if any).

The benefit is that all archs now get the matching for free. There's one
hook the arch might want to provide to match a PHB bus to its device
node. A default weak implementation is provided that looks for the
parent device device node, but it's not entirely reliable on powerpc for
various reasons so powerpc provides its own.

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Michal Simek 
Acked-by: Jesse Barnes

powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller

2011-02-04T18:46:51+00:00

Currently, ppc32 uses sysdata for the pci_controller pointer, and
ppc64 uses it to hold the device_node pointer.  This patch moves the
of_node pointer into (struct pci_bus*)->dev.of_node and
(struct pci_dev*)->dev.of_node so that sysdata can be converted to always
use the pci_controller pointer instead.  It also fixes up the
allocating of pci devices so that the of_node pointer gets assigned
consistently and increments the ref count.

Signed-off-by: Grant Likely

powerpc/pci: Fix checking for child bridges in PCI code.

2010-08-24T05:28:27+00:00

pci_device_to_OF_node() can return null, and list_for_each_entry will
never enter the loop when dev is NULL, so it looks like this test is
a typo.

Reported-by: Julia Lawall 
Signed-off-by: Grant Likely 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pci: Drop unnecessary null test

2010-08-24T05:26:28+00:00

list_for_each_entry binds its first argument to a non-null value, and thus
any null test on the value of that argument is superfluous.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// 
@@
iterator I;
expression x,E,E1,E2;
statement S,S1,S2;
@@

I(x,...) { <...
- if (x != NULL || ...)
  S
  ...> }
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pci: Check devices status property when scanning OF tree

2010-05-21T07:31:09+00:00

We ran into an issue where it looks like we're not properly ignoring a
pci device with a non-good status property when we walk the device tree
and instanciate the Linux side PCI devices.

However, the EEH init code does look for the property and disables EEH
on these devices. This leaves us in an inconsistent where we are poking
at a supposedly bad piece of hardware and RTAS will block our config
cycles because EEH isn't enabled anyway.

Signed-of-by: Sonny Rao 

Signed-off-by: Benjamin Herrenschmidt

powerpc: Remove trailing space in messages

2010-02-09T02:56:23+00:00

Signed-off-by: Frans Pop 
Cc: linuxppc-dev@ozlabs.org
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pci: Add missing call to header fixup

2010-01-29T05:51:11+00:00

Add missing call to  pci_fixup_device(pci_fixup_early, ...) when
building the pci_dev from scratch off the Open Firmware device-tree

Signed-off-by: Benjamin Herrenschmidt

powerpc/pci: Add missing hookup to pci_slot

2010-01-29T05:51:10+00:00

Add missing hookup to existing pci_slot when building the pci_dev from
scratch off the Open Firmware device-tree

Signed-off-by: Benjamin Herrenschmidt