linux.git/arch/powerpc/kernel/of_platform.c, branch v2.6.24

[POWERPC] Move of_device allocation into of_device.[ch]

2007-10-17T12:30:07+00:00

Extract generic of_device allocation code from of_platform_device_create()
and move it into of_device.[ch], called of_device_alloc(). Also, there's now
of_device_free() which puts the device node.

This way, bus drivers that build on of_platform (like ibmebus will) can
build upon this code instead of reinventing the wheel.

Signed-off-by: Joachim Fenkes 
Acked-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[POWERPC] Prepare to remove of_platform_driver name

2007-10-09T11:00:48+00:00

The name field of of_platform_driver is just copied into the included
device_driver.  By not overriding an already initialised device_driver
name, we can convert the drivers over time to stop using the
of_platform_driver name.

Also we were not copying the owner field from of_platform_driver, so do
the same with it.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

Create drivers/of/platform.c

2007-07-20T04:25:51+00:00

and populate it with the common parts from PowerPC and Sparc[64].

Signed-off-by: Stephen Rothwell 
Acked-by: Paul Mackerras 
Acked-by: David S. Miller

some kmalloc/memset ->kzalloc (tree wide)

2007-07-19T17:04:50+00:00

Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc).

Here is a short excerpt of the semantic patch performing
this transformation:

@@
type T2;
expression x;
identifier f,fld;
expression E;
expression E1,E2;
expression e1,e2,e3,y;
statement S;
@@

 x =
- kmalloc
+ kzalloc
  (E1,E2)
  ...  when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\)
- memset((T2)x,0,E1);

@@
expression E1,E2,E3;
@@

- kzalloc(E1 * E2,E3)
+ kcalloc(E1,E2,E3)

[akpm@linux-foundation.org: get kcalloc args the right way around]
Signed-off-by: Yoann Padioleau 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Acked-by: Russell King 
Cc: Bryan Wu 
Acked-by: Jiri Slaby 
Cc: Dave Airlie 
Acked-by: Roland Dreier 
Cc: Jiri Kosina 
Acked-by: Dmitry Torokhov 
Cc: Benjamin Herrenschmidt 
Acked-by: Mauro Carvalho Chehab 
Acked-by: Pierre Ossman 
Cc: Jeff Garzik 
Cc: "David S. Miller" 
Acked-by: Greg KH 
Cc: James Bottomley 
Cc: "Antonino A. Daplas" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[POWERPC] Rewrite IO allocation & mapping on powerpc64

2007-06-14T12:29:56+00:00

This rewrites pretty much from scratch the handling of MMIO and PIO
space allocations on powerpc64.  The main goals are:

 - Get rid of imalloc and use more common code where possible
 - Simplify the current mess so that PIO space is allocated and
   mapped in a single place for PCI bridges
 - Handle allocation constraints of PIO for all bridges including
   hot plugged ones within the 2GB space reserved for IO ports,
   so that devices on hotplugged busses will now work with drivers
   that assume IO ports fit in an int.
 - Cleanup and separate tracking of the ISA space in the reserved
   low 64K of IO space. No ISA -> Nothing mapped there.

I booted a cell blade with IDE on PIO and MMIO and a dual G5 so
far, that's it :-)

With this patch, all allocations are done using the code in
mm/vmalloc.c, though we use the low level __get_vm_area with
explicit start/stop constraints in order to manage separate
areas for vmalloc/vmap, ioremap, and PCI IOs.

This greatly simplifies a lot of things, as you can see in the
diffstat of that patch :-)

A new pair of functions pcibios_map/unmap_io_space() now replace
all of the previous code that used to manipulate PCI IOs space.
The allocation is done at mapping time, which is now called from
scan_phb's, just before the devices are probed (instead of after,
which is by itself a bug fix). The only other caller is the PCI
hotplug code for hot adding PCI-PCI bridges (slots).

imalloc is gone, as is the "sub-allocation" thing, but I do beleive
that hotplug should still work in the sense that the space allocation
is always done by the PHB, but if you unmap a child bus of this PHB
(which seems to be possible), then the code should properly tear
down all the HPTE mappings for that area of the PHB allocated IO space.

I now always reserve the first 64K of IO space for the bridge with
the ISA bus on it. I have moved the code for tracking ISA in a separate
file which should also make it smarter if we ever are capable of
hot unplugging or re-plugging an ISA bridge.

This should have a side effect on platforms like powermac where VGA IOs
will no longer work. This is done on purpose though as they would have
worked semi-randomly before. The idea at this point is to isolate drivers
that might need to access those and fix them by providing a proper
function to obtain an offset to the legacy IOs of a given bus.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Fix pci_setup_phb_io_dynamic for pci_iomap

2007-06-07T01:44:40+00:00

We had a problem on a system with only dynamically allocated
PCI buses (using of_pci_phb_driver) in combination with libata.
This setup ended up having no "primary" phb, which means
that pci_io_base never got initialized and all IO port
numbers are 64 bit numbers, which is larger than the
PIO_MASK limit.

Signed-off-by: Arnd Bergmann 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Fix IO space on PCI buses created from of_platform

2007-05-17T11:11:14+00:00

This changes the way of_platform_pci creates PCI host bridges such
that it uses request_phb_iospace() for mapping the IO ports, instead
of using the dynamic hotplug stuff.  That guarantees the IO space
stays within the 2GB limit and thus doesn't break half of the legacy
drivers around.

Fixes a couple of warnings due to missing IO space while at it.

This patch is a temporary workaround for 2.6.22 before a more complete
rewrite of IO mappings is merged in 2.6.23

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Paul Mackerras

[POWERPC] Early serial debug support for PPC44x

2007-05-08T04:47:33+00:00

This adds support for early serial debugging via the built in
port on IBM/AMCC PowerPC 44x CPUs.  It uses a bolted TLB entry in
address space 1 for the UART's mapping, allowing robust debugging both
before and after the initialization of the MMU.

Signed-off-by: David Gibson 
Signed-off-by: Paul Mackerras

Merge branch 'linux-2.6' into for-2.6.22

2007-04-30T02:38:01+00:00

powerpc: make it compile for multithread change

2007-04-27T17:57:28+00:00

arch/powerpc/kernel/of_platform.c:479: error: unknown field `multithread_probe' specified in initializer

Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman