linux-toradex.git/drivers/parisc/lba_pci.c, branch v3.4.107

Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system

2012-03-28T22:58:21+00:00

Pull "Disintegrate and delete asm/system.h" from David Howells:
 "Here are a bunch of patches to disintegrate asm/system.h into a set of
  separate bits to relieve the problem of circular inclusion
  dependencies.

  I've built all the working defconfigs from all the arches that I can
  and made sure that they don't break.

  The reason for these patches is that I recently encountered a circular
  dependency problem that came about when I produced some patches to
  optimise get_order() by rewriting it to use ilog2().

  This uses bitops - and on the SH arch asm/bitops.h drags in
  asm-generic/get_order.h by a circuituous route involving asm/system.h.

  The main difficulty seems to be asm/system.h.  It holds a number of
  low level bits with no/few dependencies that are commonly used (eg.
  memory barriers) and a number of bits with more dependencies that
  aren't used in many places (eg.  switch_to()).

  These patches break asm/system.h up into the following core pieces:

    (1) asm/barrier.h

        Move memory barriers here.  This already done for MIPS and Alpha.

    (2) asm/switch_to.h

        Move switch_to() and related stuff here.

    (3) asm/exec.h

        Move arch_align_stack() here.  Other process execution related bits
        could perhaps go here from asm/processor.h.

    (4) asm/cmpxchg.h

        Move xchg() and cmpxchg() here as they're full word atomic ops and
        frequently used by atomic_xchg() and atomic_cmpxchg().

    (5) asm/bug.h

        Move die() and related bits.

    (6) asm/auxvec.h

        Move AT_VECTOR_SIZE_ARCH here.

  Other arch headers are created as needed on a per-arch basis."

Fixed up some conflicts from other header file cleanups and moving code
around that has happened in the meantime, so David's testing is somewhat
weakened by that.  We'll find out anything that got broken and fix it..

* tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)
  Delete all instances of asm/system.h
  Remove all #inclusions of asm/system.h
  Add #includes needed to permit the removal of asm/system.h
  Move all declarations of free_initmem() to linux/mm.h
  Disintegrate asm/system.h for OpenRISC
  Split arch_align_stack() out from asm-generic/system.h
  Split the switch_to() wrapper out of asm-generic/system.h
  Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
  Create asm-generic/barrier.h
  Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
  Disintegrate asm/system.h for Xtensa
  Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]
  Disintegrate asm/system.h for Tile
  Disintegrate asm/system.h for Sparc
  Disintegrate asm/system.h for SH
  Disintegrate asm/system.h for Score
  Disintegrate asm/system.h for S390
  Disintegrate asm/system.h for PowerPC
  Disintegrate asm/system.h for PA-RISC
  Disintegrate asm/system.h for MN10300
  ...

Remove all #inclusions of asm/system.h

2012-03-28T17:30:03+00:00

Remove all #inclusions of asm/system.h preparatory to splitting and killing
it.  Performed with the following command:

perl -p -i -e 's!^#\s*include\s*.*\n!!' `grep -Irl '^#\s*include\s*' *`

Signed-off-by: David Howells

parisc/PCI: get rid of device resource fixups

2012-02-24T03:19:03+00:00

Tell the PCI core about host bridge address translation so it can take
care of bus-to-resource conversion for us.

CC: linux-parisc@vger.kernel.org
Signed-off-by: Bjorn Helgaas

parisc/PCI: lba: convert to pci_create_root_bus() for correct root bus resources

2012-01-06T20:11:07+00:00

Supply root bus resources to pci_create_root_bus() so they're correct
immediately.  This fixes the problem of "early" and "header" quirks seeing
incorrect root bus resources.

CC: linux-parisc@vger.kernel.org
Signed-off-by: Bjorn Helgaas 
Signed-off-by: Jesse Barnes

parisc/PCI: lba: use pci_create_bus() instead of pci_scan_bus_parented()

2012-01-06T20:11:06+00:00

No functional change here; just converting from pci_scan_bus_parented()
to pci_create_bus() to make a future patch simpler.

CC: linux-parisc@vger.kernel.org
Signed-off-by: Bjorn Helgaas 
Signed-off-by: Jesse Barnes

parisc/PCI: lba: deal with LMMIO/PAT overlaps before creating PCI root bus

2012-01-06T20:11:05+00:00

This moves the truncate_pat_collision() call out of the pcibios_fixup_bus()
path so that when a future patch builds a list of root bus resources for
pci_create_bus(), it can use the truncated LMMIO range.

truncate_pat_collision() used to be called in this path:

    pci_scan_bus_parented
      pci_create_bus
      pci_scan_child_bus
        pcibios_fixup_bus
	  lba_fixup_bus
	    truncate_pat_collision

All of the PAT and lba_dev resource setup must be done before we call
pci_scan_bus_parented(), so it should be safe to move the
truncate_pat_collision() to just before pci_scan_bus_parented().

CC: linux-parisc@vger.kernel.org
Signed-off-by: Bjorn Helgaas 
Signed-off-by: Jesse Barnes

parisc: fixed faulty check in lba_pci

2009-08-02T10:35:40+00:00

This patche fixes a spelling error that has resulted from copy and pasting.
The location of the error was found using a semantic patch but the semantic
patch was not trying to find these errors. After looking things over it
seemed logical that this change was needed.

Signed-off-by: Stoyan Gaydarov 
Signed-off-by: Helge Deller

parisc: Fix gcc 4.4 warning in lba_pci.c

2009-07-03T03:34:08+00:00

gcc 4.4 warns about:
drivers/parisc/lba_pci.c: In function 'lba_pat_resources':
drivers/parisc/lba_pci.c:1099: warning: the frame size of 8280 bytes is larger than 4096 bytes

The problem is we declare two large structures on the stack. They don't need
to be on the stack since they are only used during LBA initialization (which
is serialized). Moving to be "static".

Signed-off-by: Grant Grundler 
Signed-off-by: Kyle McMartin

parisc: advertise PCI devs after "assign_resources"

2009-07-03T03:34:07+00:00

Alex Chiang asked me why PARISC was calling pci_bus_add_devices()
and pci_bus_assign_resources() in the opposite order from everyone else.
No reason and I couldn't see any data dependency.
Patch below applies cleanly to 2.6.30-rc2.

Later, I suspected the code worked only because no drivers would be
loaded/ready until much later in the system initialization sequence.

Tested "LBA" code on J6000 (32-bit) and A500 (64-bit SMP) with 2.6.30-rc2.
Not tested with any Dino controllers.
Not tested with PCI-PCI Bridge (TBD).

Reported-by: Alex Chiang 
Signed-off-by: Grant Grundler 
Signed-off-by: Kyle McMartin

parisc: fix wrong assumption about bus->self

2009-03-13T05:19:12+00:00

Kenji Kaneshige  posted a patch series
to linux-pci to fix a wrong assumption about pci_bus->self==NULL for
all PCI host bus controllers. While PARISC platforms to not behave
this way, I prefer to have the code consistent across architectures.
The following patch replaces pci_bus->self with pci_bus->parent when
used as a test to check for "root bus controller".

Signed-off-by: Grant Grundler 
Signed-off-by: Kyle McMartin