linux-stable.git/include/linux/device.h, branch linux-2.6.25.y

iommu sg merging: add device_dma_parameters structure

2008-02-05T17:44:10+00:00

IOMMUs merges scatter/gather segments without considering a low level
driver's restrictions. The problem is that IOMMUs can't access to the
limitations because they are in request_queue.

This patchset introduces a new structure, device_dma_parameters,
including dma information. A pointer to device_dma_parameters is added
to struct device. The bus specific structures (like pci_dev) includes
device_dma_parameters. Low level drivers can use dma_set_max_seg_size
to tell IOMMUs about the restrictions.

We can move more dma stuff in struct device (like dma_mask) to struct
device_dma_parameters later (needs some cleanups before that).

This includes patches for all the IOMMUs that could merge sg (x86_64,
ppc, IA64, alpha, sparc64, and parisc) though only the ppc patch was
tested. The patches for other IOMMUs are only compile tested.

This patch:

Add a new structure, device_dma_parameters, including dma information.  A
pointer to device_dma_parameters is added to struct device.

- there are only max_segment_size and segment_boundary_mask there but we'll
  move more dma stuff in struct device (like dma_mask) to struct
  device_dma_parameters later.  segment_boundary_mask is not supported yet.

- new accessors for the dma parameters are added.  So we can easily change
  where to place struct device_dma_parameters in the future.

- dma_get_max_seg_size returns 64K if dma_parms in struct device isn't set
  up properly.  64K is the default max_segment_size in the block layer.

Signed-off-by: FUJITA Tomonori 
Acked-by: Jeff Garzik 
Cc: James Bottomley 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

PM: Export device_pm_schedule_removal

2008-02-02T23:14:48+00:00

Move the declaration of device_pm_schedule_removal() to device.h
and make it exported, as it will be used directly by some drivers
for unregistering device objects during suspend/resume cycles in a
safe way.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Pavel Machek 
Signed-off-by: Greg Kroah-Hartman

Driver core: add bus_find_device_by_name function

2008-01-27T23:01:39+00:00

The driver core, and some other parts of the kernel just want to find a
device based on a name for a specific bus.  Give them a simple wrapper
to prevent them from having to always roll their own.

This will be used in the PPC patch later in this series.

Cc: Paul Mackerras 
Signed-off-by: Greg Kroah-Hartman

Driver core: fix coding style issues in device.h

2008-01-25T05:04:46+00:00

Finally clean up the odd spaces and other mess in device.h

Signed-off-by: Greg Kroah-Hartman

Driver Core: add class iteration api

2008-01-25T04:40:44+00:00

Add the following class iteration functions for driver use:
	class_for_each_device
	class_find_device
	class_for_each_child
	class_find_child

Signed-off-by: Dave Young 
Acked-by: Cornelia Huck 
Signed-off-by: Greg Kroah-Hartman

Driver core: move the static kobject out of struct driver

2008-01-25T04:40:35+00:00

This patch removes the kobject, and a few other driver-core-only fields
out of struct driver and into the driver core only.  Now drivers can be
safely create on the stack or statically (like they currently are.)

Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

Driver: add driver_add_kobj for looney iseries_veth driver

2008-01-25T04:40:34+00:00

The iseries driver wants to hang kobjects off of its driver, so, to
preserve backwards compatibility, we need to add a call to the driver
core to allow future changes to work properly.

Hopefully no one uses this function in the future and the iseries_veth
driver authors come to their senses so I can remove this hack...

Cc: Dave Larson 
Cc: Santiago Leon 
Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

driver core: Introduce default attribute groups.

2008-01-25T04:40:34+00:00

This is lot like default attributes for devices (and indeed,
a lot of the code is lifted from there).

Signed-off-by: Cornelia Huck 
Signed-off-by: Greg Kroah-Hartman

driver core: remove fields from struct bus_type

2008-01-25T04:40:33+00:00

struct bus_type is static everywhere in the kernel.  This moves the
kobject in the structure out of it, and a bunch of other private only to
the driver core fields are now moved to a private structure.  This lets
us dynamically create the backing kobject properly and gives us the
chance to be able to document to users exactly how to use the struct
bus_type as there are no fields they can improperly access.

Thanks to Kay for the build fixes on this patch.

Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman

driver core: add way to get to bus device klist

2008-01-25T04:40:33+00:00

This allows an easier way to get to the device klist associated with a
struct bus_type (you have three to choose from...)  This will make it
easier to move these fields to be dynamic in a future patch.

The only user of this is the PCI core which horribly abuses this
interface to rearrange the order of the pci devices.  This should be
done using the existing bus device walking functions, but that's left
for future patches.

Cc: Kay Sievers 
Signed-off-by: Greg Kroah-Hartman