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98 commits

Author SHA1 Message Date
Linus Torvalds
ed458df4d2 PnP: move pnpacpi/pnpbios_init to after PCI init
We already did that a long time ago for pnp_system_init, but
pnpacpi_init and pnpbios_init remained as subsys_initcalls, and get
linked into the kernel before the arch-specific routines that finalize
the PCI resources (pci_subsys_init).

This means that the PnP routines would either register their resources
before the PCI layer could, or would be unable to check whether a PCI
resource had already been registered.  Both are problematic.

I wanted to do this before 2.6.27, but every time we change something
like this, something breaks.  That said, _every_ single time we trust
some firmware (like PnP tables) more than we trust the hardware itself
(like PCI probing), the problems have been worse.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-10 08:00:17 -07:00
Bjorn Helgaas
de82ff783b PNPACPI: ignore the producer/consumer bit for extended IRQ descriptors
The Extended Interrupt descriptor has a producer/consumer bit, but
it's not clear what that would mean, and existing BIOSes use the bit
inconsistently.  This patch makes Linux PNPACPI ignore the bit.

The ACPI spec contains examples of PCI Interrupt Link devices marked
as ResourceProducers, but many BIOSes mark them as ResourceConsumers.

I also checked with a Windows contact, who said:

    Windows uses only "resource consumer" when dealing with
    interrupts.  There's no useful way of looking at a resource
    producer of interrupts.

    ... NT-based Windows largely infers the producer/consumer stuff
    from the device type and ignores the bits in the namespace.  This
    was necessary because Windows 98 ignored them and early namespaces
    contained random junk.

The reason I want to change this is because if PNPACPI devices exclude
ResourceProducer IRQ resources, we can't write PNP drivers for those
devices.

For example, on machines such as the the HP rx7620, rx7640, rx8620,
rx8640, and Superdome, HPET interrupts are ResourceProducers.  The
HPET driver currently has to use acpi_bus_register_driver() and do its
own _CRS parsing, even though it requires absolutely no ACPI-specific
functionality.

It would be better if the HPET driver were a PNP driver and took
advantage of the _CRS parsing built into PNPACPI.

This producer/consumer check was originally added here:
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=2b8de5f50e4a302b83ebcd5b0120621336d50bd6

to fix this bug:
    http://bugzilla.kernel.org/show_bug.cgi?id=6292

However, the bug was related only to memory and I/O port resources,
where the distinction is sensible and important to Linux.  Given that
the distinction is muddled for IRQ resources, I think it was a mistake
to add the check there.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-08-25 12:04:44 +02:00
Bjorn Helgaas
40ab4f4c1d PNPACPI: add support for HP vendor-specific CCSR descriptors
The HP CCSR descriptor describes MMIO address space that should appear
as a MEM resource.  This patch adds support for parsing these descriptors
in the _CRS data.

The visible effect of this is that these MEM resources will appear
in /sys/devices/pnp0/.../resources, which means that "lspnp -v" will
report it, user applications can use this to locate device CSR space,
and kernel drivers can use the normal PNP resource accessors to
locate them.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-07-16 23:27:07 +02:00
Bjorn Helgaas
1f32ca31e7 PNP: convert resource options to single linked list
ISAPNP, PNPBIOS, and ACPI describe the "possible resource settings" of
a device, i.e., the possibilities an OS bus driver has when it assigns
I/O port, MMIO, and other resources to the device.

PNP used to maintain this "possible resource setting" information in
one independent option structure and a list of dependent option
structures for each device.  Each of these option structures had lists
of I/O, memory, IRQ, and DMA resources, for example:

  dev
    independent options
      ind-io0  -> ind-io1  ...
      ind-mem0 -> ind-mem1 ...
      ...
    dependent option set 0
      dep0-io0  -> dep0-io1  ...
      dep0-mem0 -> dep0-mem1 ...
      ...
    dependent option set 1
      dep1-io0  -> dep1-io1  ...
      dep1-mem0 -> dep1-mem1 ...
      ...
    ...

This data structure was designed for ISAPNP, where the OS configures
device resource settings by writing directly to configuration
registers.  The OS can write the registers in arbitrary order much
like it writes PCI BARs.

However, for PNPBIOS and ACPI devices, the OS uses firmware interfaces
that perform device configuration, and it is important to pass the
desired settings to those interfaces in the correct order.  The OS
learns the correct order by using firmware interfaces that return the
"current resource settings" and "possible resource settings," but the
option structures above doesn't store the ordering information.

This patch replaces the independent and dependent lists with a single
list of options.  For example, a device might have possible resource
settings like this:

  dev
    options
      ind-io0 -> dep0-io0 -> dep1->io0 -> ind-io1 ...

All the possible settings are in the same list, in the order they
come from the firmware "possible resource settings" list.  Each entry
is tagged with an independent/dependent flag.  Dependent entries also
have a "set number" and an optional priority value.  All dependent
entries must be assigned from the same set.  For example, the OS can
use all the entries from dependent set 0, or all the entries from
dependent set 1, but it cannot mix entries from set 0 with entries
from set 1.

Prior to this patch PNP didn't keep track of the order of this list,
and it assigned all independent options first, then all dependent
ones.  Using the example above, that resulted in a "desired
configuration" list like this:

  ind->io0 -> ind->io1 -> depN-io0 ...

instead of the list the firmware expects, which looks like this:

  ind->io0 -> depN-io0 -> ind-io1 ...

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-16 23:27:07 +02:00
Bjorn Helgaas
e2a1a6f1cf PNP: remove extra 0x100 bit from option priority
When building resource options, ISAPNP and PNPBIOS set the priority
to something like "0x100 | PNP_RES_PRIORITY_ACCEPTABLE", but we
immediately mask off the 0x100 again in pnp_build_option(), so that
bit looks superfluous.

Thanks to Rene Herman <rene.herman@gmail.com> for pointing this out.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-16 23:27:07 +02:00
Bjorn Helgaas
fe2cf598e6 PNPACPI: ignore _PRS interrupt numbers larger than PNP_IRQ_NR
ACPI Extended Interrupt Descriptors can encode 32-bit interrupt
numbers, so an interrupt number may exceed the size of the bitmap
we use to track possible IRQ settings.

To avoid corrupting memory, complain and ignore too-large interrupt
numbers.

There's similar code in pnpacpi_parse_irq_option(), but I didn't
change that because the small IRQ descriptor can only encode
IRQs 0-15, which do not exceed bitmap size.

In the future, we could handle IRQ numbers greater than PNP_IRQ_NR
by replacing the bitmap with a table or list.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-16 23:27:07 +02:00
Bjorn Helgaas
c227536b4c PNP: centralize resource option allocations
This patch moves all the option allocations (pnp_mem, pnp_port, etc)
into the pnp_register_{mem,port,irq,dma}_resource() functions.  This
will make it easier to rework the option data structures.

The non-trivial part of this patch is the IRQ handling.  The backends
have to allocate a local pnp_irq_mask_t bitmap, populate it, and pass
a pointer to pnp_register_irq_resource().

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-16 23:27:07 +02:00
Bjorn Helgaas
7aefff5185 PNP: introduce pnp_irq_mask_t typedef
This adds a typedef for the IRQ bitmap, which should cause
no functional change, but will make it easier to pass a
pointer to a bitmap to pnp_register_irq_resource().

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-16 23:27:06 +02:00
Bjorn Helgaas
08c9f262f2 PNP: define PNP-specific IORESOURCE_IO_* flags alongside IRQ, DMA, MEM
PNP previously defined PNP_PORT_FLAG_16BITADDR and PNP_PORT_FLAG_FIXED
in a private header file, but put those flags in struct resource.flags
fields.  Better to make them IORESOURCE_IO_* flags like the existing
IRQ, DMA, and MEM flags.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-16 23:27:06 +02:00
Bjorn Helgaas
5acf914157 PNPACPI: keep disabled resources when parsing current config
When we parse a device's _CRS data (the current resource settings),
we should keep track of everything we find, even if it's currently
disabled or invalid.

This is what we already do for ISAPNP and PNPBIOS, and it helps
keep things matched up when we subsequently re-encode resources.
For example, consider a device with (mem, irq0, irq1, io), where
irq0 is disabled.  If we drop irq0 when parsing the _CRS, we will
mistakenly put irq1 in the irq0 slot when we encode resources
for an _SRS call.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-07-16 23:27:06 +02:00
Bjorn Helgaas
aee3ad815d PNP: replace pnp_resource_table with dynamically allocated resources
PNP used to have a fixed-size pnp_resource_table for tracking the
resources used by a device.  This table often overflowed, so we've
had to increase the table size, which wastes memory because most
devices have very few resources.

This patch replaces the table with a linked list of resources where
the entries are allocated on demand.

This removes messages like these:

    pnpacpi: exceeded the max number of IO resources
    00:01: too many I/O port resources

References:

    http://bugzilla.kernel.org/show_bug.cgi?id=9535
    http://bugzilla.kernel.org/show_bug.cgi?id=9740
    http://lkml.org/lkml/2007/11/30/110

This patch also changes the way PNP uses the IORESOURCE_UNSET,
IORESOURCE_AUTO, and IORESOURCE_DISABLED flags.

Prior to this patch, the pnp_resource_table entries used the flags
like this:

    IORESOURCE_UNSET
	This table entry is unused and available for use.  When this flag
	is set, we shouldn't look at anything else in the resource structure.
	This flag is set when a resource table entry is initialized.

    IORESOURCE_AUTO
	This resource was assigned automatically by pnp_assign_{io,mem,etc}().

	This flag is set when a resource table entry is initialized and
	cleared whenever we discover a resource setting by reading an ISAPNP
	config register, parsing a PNPBIOS resource data stream, parsing an
	ACPI _CRS list, or interpreting a sysfs "set" command.

	Resources marked IORESOURCE_AUTO are reinitialized and marked as
	IORESOURCE_UNSET by pnp_clean_resource_table() in these cases:

	    - before we attempt to assign resources automatically,
	    - if we fail to assign resources automatically,
	    - after disabling a device

    IORESOURCE_DISABLED
	Set by pnp_assign_{io,mem,etc}() when automatic assignment fails.
	Also set by PNPBIOS and PNPACPI for:

	    - invalid IRQs or GSI registration failures
	    - invalid DMA channels
	    - I/O ports above 0x10000
	    - mem ranges with negative length

After this patch, there is no pnp_resource_table, and the resource list
entries use the flags like this:

    IORESOURCE_UNSET
	This flag is no longer used in PNP.  Instead of keeping
	IORESOURCE_UNSET entries in the resource list, we remove
	entries from the list and free them.

    IORESOURCE_AUTO
	No change in meaning: it still means the resource was assigned
	automatically by pnp_assign_{port,mem,etc}(), but these functions
	now set the bit explicitly.

	We still "clean" a device's resource list in the same places,
	but rather than reinitializing IORESOURCE_AUTO entries, we
	just remove them from the list.

	Note that IORESOURCE_AUTO entries are always at the end of the
	list, so removing them doesn't reorder other list entries.
	This is because non-IORESOURCE_AUTO entries are added by the
	ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the
	sysfs "set" command.  In each of these cases, we completely free
	the resource list first.

    IORESOURCE_DISABLED
	In addition to the cases where we used to set this flag, ISAPNP now
	adds an IORESOURCE_DISABLED resource when it reads a configuration
	register with a "disabled" value.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-07-16 23:27:05 +02:00
David Brownell
2fe2de5f6c ACPI PM: acpi_pm_device_sleep_state() cleanup
Get rid of a superfluous acpi_pm_device_sleep_state() parameter.  The
only legitimate value of that parameter must be derived from the first
parameter, which is what all the callers already do.  (However, this
does not address the fact that ACPI still doesn't set up those flags.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-16 23:27:02 +02:00
Bjorn Helgaas
36d872a370 PNPACPI: use _CRS IRQ descriptor length for _SRS
When configuring the resources of an ACPI device, we first evaluate _CRS
to get a template of resource descriptors, then fill in the specific
resource values we want, and finally evaluate _SRS to actually configure
the device.

Some resources have optional fields, so the size of encoded descriptors
varies depending on the specific values.  For example, IRQ descriptors can
be either two or three bytes long.  The third byte contains triggering
information and can be omitted if the IRQ is edge-triggered and active
high.

The BIOS often assumes that IRQ descriptors in the _SRS buffer use the
same format as those in the _CRS buffer, so this patch enforces that
constraint.

The "Start Dependent Function" descriptor also has an optional byte, but
we don't currently encode those descriptors, so I didn't do anything for
those.

I have tested this patch on a Toshiba Portege 4000.  Without the patch,
parport_pc claims the parallel port only if I use "pnpacpi=off".  This
patch makes it work with PNPACPI.

This is an extension of a patch by Tom Jaeger:
    http://bugzilla.kernel.org/show_bug.cgi?id=9487#c42

References:
    http://bugzilla.kernel.org/show_bug.cgi?id=5832 Enabling ACPI Plug and Play in kernels >2.6.9 kills Parallel support
    http://bugzilla.kernel.org/show_bug.cgi?id=9487 buggy firmware expects four-byte IRQ resource descriptor (was: Serial port disappears after Suspend on Toshiba R25)
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1d5b285da1893b90507b081664ac27f1a8a3dc5b related ACPICA fix

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:46 -04:00
Bjorn Helgaas
a993273bea pnpacpi: fix shareable IRQ encode/decode
When we encode IRQ resources, we should use the "shareable" flag we got
from _PRS rather than guessing based on the IRQ trigger mode.

This is based on a patch by Tom Jaeger:
    http://bugzilla.kernel.org/show_bug.cgi?id=9487#c32

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:46 -04:00
Bjorn Helgaas
e9fe9e1881 pnpacpi: fix IRQ flag decoding
When decoding IRQ trigger mode and polarity, it is not enough to mask by
IORESOURCE_BITS because there are now additional bits defined.  For
example, if IORESOURCE_IRQ_SHAREABLE was set, we failed to set *triggering
and *polarity at all.

I can't point to a failure that this patch fixes, but
bugs in this area have caused problems when resuming after
suspend, for example:

    http://bugzilla.kernel.org/show_bug.cgi?id=6316
    http://bugzilla.kernel.org/show_bug.cgi?id=9487
    https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.22/+bug/152187

This is based on a patch by Tom Jaeger:
    http://bugzilla.kernel.org/show_bug.cgi?id=9487#c32

[rene.herman@keyaccess.nl: fix comment]
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:46 -04:00
Len Brown
008238b54a Merge branch 'pnp' into release 2008-04-30 13:59:05 -04:00
Sam Ravnborg
9448b0d43e acpi: fix section mismatch warning in pnpacpi
Fix following section mismatch warning:
WARNING: vmlinux.o(.text+0x153d69): Section mismatch in reference from the function is_exclusive_device() to the variable .init.data:excluded_id_list

is_exclusive_device is only used from __init context so document
this with the __init annotation and get rid of the warning.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-30 13:33:26 -04:00
Bjorn Helgaas
d152cf5d0c PNPACPI: move _CRS/_PRS warnings closer to the action
Move warnings about _CRS and _PRS problems to the place where we
actually make the ACPI calls.  Then we don't have to pass around
acpi_status values any more than necessary.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:30 -04:00
Bjorn Helgaas
d6180f3661 PNP: make generic pnp_add_mem_resource()
Add a pnp_add_mem_resource() that can be used by all the PNP
backends.  This consolidates a little more pnp_resource_table
knowledge into one place.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:29 -04:00
Bjorn Helgaas
cc8c2e3081 PNP: make generic pnp_add_io_resource()
Add a pnp_add_io_resource() that can be used by all the PNP
backends.  This consolidates a little more pnp_resource_table
knowledge into one place.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:29 -04:00
Bjorn Helgaas
dc16f5f2ed PNP: make generic pnp_add_dma_resource()
Add a pnp_add_dma_resource() that can be used by all the PNP
backends.  This consolidates a little more pnp_resource_table
knowledge into one place.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:28 -04:00
Bjorn Helgaas
dbddd0383c PNP: make generic pnp_add_irq_resource()
Add a pnp_add_irq_resource() that can be used by all the PNP
backends.  This consolidates a little more pnp_resource_table
knowledge into one place.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:28 -04:00
Bjorn Helgaas
06cb58a6eb PNP: remove pnp_resource_table references from resource decoders
This removes a few more references to the pnp_resource_table.
No functional change.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:27 -04:00
Bjorn Helgaas
02d83b5da3 PNP: make pnp_resource_table private to PNP core
There are no remaining references to the PNP_MAX_* constants or
the pnp_resource_table structure outside of the PNP core.  Make
them private to the PNP core.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:27 -04:00
Bjorn Helgaas
7e2cf31f1c PNP: convert encoders to use pnp_get_resource(), not pnp_resource_table
This removes more direct references to pnp_resource_table.  This
path is used when telling a device what resources it should use.

This doesn't convert ISAPNP because ISA needs to know the config
register index in addition to the resource itself.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:26 -04:00
Bjorn Helgaas
af11cb2d52 PNP: use dev_printk when possible
Use dev_printk() when possible for more informative error messages.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:23 -04:00
Bjorn Helgaas
f449000209 PNP: add pnp_init_resources(struct pnp_dev *) interface
Add pnp_init_resources(struct pnp_dev *) to replace
pnp_init_resource_table(), which takes a pointer to the
pnp_resource_table itself.  Passing only the pnp_dev * reduces
the possibility for error in the caller and removes the
pnp_resource_table implementation detail from the interface.

Even though pnp_init_resource_table() is exported, I did not
export pnp_init_resources() because it is used only by the PNP
core.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:22 -04:00
Bjorn Helgaas
72dcc883d8 PNP: add debug output to encoders
Add debug output to encoders (enabled by CONFIG_PNP_DEBUG).  This
uses dev_printk, so I had to add pnp_dev arguments at the same time.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:21 -04:00
Bjorn Helgaas
4ab55d8d4f PNP: remove more pnp_resource_table arguments
Stop passing around struct pnp_resource_table pointers.  In most cases,
the caller doesn't need to know how the resources are stored inside
the struct pnp_dev.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:21 -04:00
Bjorn Helgaas
59284cb409 PNP: remove pnp_resource_table from internal get/set interfaces
When we call protocol->get() and protocol->set() methods, we currently
supply pointers to both the pnp_dev and the pnp_resource_table even
though the pnp_resource_table should always be the one associated with
the pnp_dev.

This removes the pnp_resource_table arguments to make it clear that
these methods only operate on the specified pnp_dev.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:21 -04:00
Bjorn Helgaas
c1caf06ccf PNP: add debug output to option registration
Add debug output to resource option registration functions (enabled
by CONFIG_PNP_DEBUG).  This uses dev_printk, so I had to add pnp_dev
arguments at the same time.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:20 -04:00
Bjorn Helgaas
cdef6254e1 PNPACPI: pass pnp_dev instead of acpi_handle
Pass the pnp_dev pointer when possible instead of the acpi_handle.
This allows better error messages and reduces the chance of error
in the caller.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:19 -04:00
Bjorn Helgaas
cd7ec927d9 PNPACPI: extend irq_flags() to set IORESOURCE_IRQ_SHAREABLE when appropriate
This simplifies IRQ resource parsing slightly by computing all the
IORESOURCE_IRQ_* flags at the same time.

This also keeps track of shareability information when parsing options
from _PRS.  Previously we ignored shareability in _PRS.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:18 -04:00
Bjorn Helgaas
bb84b41d1a PNPACPI: hoist dma_flags() out of pnpacpi_parse_allocated_dmaresource()
Hoist dma_flags() out of pnpacpi_parse_allocated_dmaresource() into its
caller.  This makes pnpacpi_parse_allocated_dmaresource() more similar
to pnpbios_parse_allocated_dmaresource().

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:18 -04:00
Bjorn Helgaas
9570a20e9d PNPACPI: use temporaries to reduce repetition
No functional change, just fewer words and fewer chances for
transcription errors.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:18 -04:00
Bjorn Helgaas
f7e8466a04 PNPACPI: pnpacpi_encode_ext_irq() wrongly set "irq" instead of "extended_irq"
pnpacpi_encode_ext_irq() should set resource->data.extended_irq, not
resource->data.irq.

This has been wrong since at least 2.6.12.  I haven't seen any bug
reports, but it's clearly incorrect.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:18 -04:00
Bjorn Helgaas
bda1e4e5a3 PNP: add pnp_alloc_dev()
Add pnp_alloc_dev() to allocate a struct pnp_dev and fill in the
protocol, instance number, and initial PNP ID.  Now it is always
valid to use dev_printk() on any pnp_dev pointer.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:16 -04:00
Bjorn Helgaas
772defc629 PNP: change pnp_add_id() to allocate its own pnp_id structures
This moves some of the pnp_id knowledge out of the backends and into
the PNP core.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:16 -04:00
Bjorn Helgaas
1692b27bf3 PNP: make pnp_add_id() internal to PNP core
pnp_add_id() doesn't need to be exposed outside the PNP core, so
move the declaration to an internal header file.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:15 -04:00
Bjorn Helgaas
4a49049864 PNPACPI: continue after _CRS and _PRS errors
Keep going and register the device even if we have trouble parsing
_CRS or _PRS.  A parsing problem might mean we ignore some resources
the device is using, or we might not be able to change its resources.
But we should still take note of anything we *could* parse correctly.

Also remove reference to dev_id because I plan to remove it soon.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:15 -04:00
Bjorn Helgaas
1bd17e63a0 PNP: turn on -DDEBUG when CONFIG_PNP_DEBUG is set
Turn on -DDEBUG in CFLAGS when CONFIG_PNP_DEBUG=y.  This makes
dev_dbg() do what you expect.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-29 03:22:14 -04:00
Len Brown
0093cb1199 pnpacpi: fix potential corruption on "pnpacpi: exceeded the max number of IRQ resources 2"
PNP_MAX_IRQ is 2
If a device invokes pnpacpi_parse_allocated_irqresource() 0, 1, or 2 times, we are happy.
The 3rd time, we will fail and print "pnpacpi: exceeded the max number of IRQ resources: 2"
The 4th and subsequent calls (if this ever happened) would silently scribble on
irq_resource[2], which doesn't actualy exist.

Found-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-23 12:22:13 -07:00
Len Brown
33fd7afd66 pnpacpi: reduce printk severity for "pnpacpi: exceeded the max number of ..."
We have been printing these messages at KERN_ERR since 2.6.24,
per http://bugzilla.kernel.org/show_bug.cgi?id=9535

But KERN_ERR pops up on a console booted with "quiet"
and causes users to get alarmed and file bugs
about the message itself:
https://bugzilla.redhat.com/show_bug.cgi?id=436589

So reduce the severity of these messages to
KERN_WARNING, which is not printed by "quiet".

This message will still be seen without "quiet",
but a lot of messages are printed in that mode
and it will be less likely to cause undue alarm.

We could go all the way to KERN_DEBUG, but this
is a real warning after all, so it seems prudent
not to require "debug" to see it.

Signed-off-by: Len Brown <len.brown@intel.com>
2008-03-26 14:22:20 -04:00
Roel Kluin
6bf69b5ebf pnpacpi: __initdata is not an identifier
sparse complains at drivers/pnp/pnpacpi/core.c:39 with the error:
Trying to use reserved word '__attribute__' as identifier
Expected ) in function declarator, got ".init.data"

and at drivers/pnp/pnpacpi/core.c:49:38 with the error:
undefined identifier 'excluded_id_list'

With the patch below these sparse complaints do not occur

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-14 01:19:16 -05:00
Len Brown
c64768a7d6 Merge branches 'release', 'bugzilla-6217', 'bugzilla-6629', 'bugzilla-6933', 'bugzilla-7186', 'bugzilla-8269', 'bugzilla-8570', 'bugzilla-9139', 'bugzilla-9277', 'bugzilla-9341', 'bugzilla-9444', 'bugzilla-9614', 'bugzilla-9643' and 'bugzilla-9644' into release 2008-02-07 03:09:43 -05:00
Thomas Renninger
2bb9a6b32f pnp: declare PNP option parsing functions as __init
There are three kind of parse functions provided by PNP acpi/bios:
 - get current resources
 - set resources
 - get possible resources
The first two may be needed later at runtime.
The possible resource settings should never change dynamically.
And even if this would make any sense (I doubt it), the current implementation
only parses possible resource settings at early init time:
  -> declare all the option parsing __init

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-By: Rene Herman <rene.herman@gmail.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06 10:41:19 -08:00
Len Brown
efe7cf2dcf pnpacpi: print resource shortage message only once (more)
Wups, previous patch was ineffective in 2 cases.

http://bugzilla.kernel.org/show_bug.cgi?id=9535

Signed-off-by: Len Brown <len.brown@intel.com>
Reported-by: "Hartkopp, Oliver (K-EFE/E)" <oliver.hartkopp@volkswagen.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-01-17 15:38:58 -08:00
Shaohua Li
856608ee5e pnp: Failed to activate device 00:0a - Samsung P35 XVM 1600 III
PNP_WRITE requires protocol supports .set. If ACPI doesn't support _SRS, .set ismeanless, so PNP_WRITE.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-01-12 19:37:49 -05:00
Len Brown
66a21736de pnpacpi: print resource shortage message only once
pnpacpi: exceeded the max number of IO resources: 40

While this message is a real error and should thus
remain KERN_ERR (even a new dmesg line is seen as a regression
by some, since it was not printed in 2.6.23...) it is certainly
impolite to print this warning 50 times should you happen to
have the oddball system with 90 io resources under a device...

So print the warning just once.

In 2.6.25 we'll get rid of the limits altogether
and these warnings will vanish with them.

http://bugzilla.kernel.org/show_bug.cgi?id=9535

Signed-off-by: Len Brown <len.brown@intel.com>
2008-01-12 17:56:36 -05:00
Zhao Yakui
a7839e9606 PNP: increase the maximum number of resources
On some systems the number of resources(IO,MEM) returnedy by PNP device is
greater than the PNP constant, for example motherboard devices.  It brings
that some resources can't be reserved and resource confilicts.  This will
cause PCI resources are assigned wrongly in some systems, and cause hang.
This is a regression since we deleted ACPI motherboard driver and use PNP
system driver.

[akpm@linux-foundation.org: fix text and coding-style a bit]
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Thomas Renninger <trenn@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-29 09:24:52 -08:00